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University of Hawaii – Manoa
1.
Torres, Jordan Shoichi.
Performance analysis of grid-tied photovoltaic micro-inverters.
Degree: 2016, University of Hawaii – Manoa
URL: http://hdl.handle.net/10125/101858 
► M.S. University of Hawaii at Manoa 2013.
Hawaii is the most petroleum dependent state in the nation. Despite having an abundance of natural resources, 94…
(more)
▼ M.S. University of Hawaii at Manoa 2013.
Hawaii is the most petroleum dependent state in the nation. Despite having an abundance of natural resources, 94 percent of Hawaii's primary energy was derived from imported oil in 2010 [1]. "Residential consumers in Hawaii pay twice the national average for electricity and almost three times the national average (per BTU) for total energy consumed in homes" [2]. Decreasing Hawaii's dependency on imported fossil fuels will put the state on the path of increased independence from fluctuating oil prices and availability, as well as decreasing the pollution associated with the burning of oil.
The burning of oil at power plants and the combustion of gasoline for transportation emits harmful pollutants into the atmosphere promoting global warming which is detrimental to the earth's atmosphere and have negative effects on human well-being. These negative impacts associated with Hawaii's fossil fuel dependence create the necessity for a change in Hawaii's primary energy source.
Renewable energies are a potential solution to increase the state's energy security, which would increase economical stability. Renewable portfolio standards were established to provide states with a mechanism to increase renewable energy generation while using a costeffective, market-based approach that is administratively efficient [3]. The Hawaii Clean Energy Initiative (HCEI) established in 2008 promotes reduced energy consumption through building and household efficiency and increased deployment of renewable energy generation technologies.
The goal of the initiative is to reduce fossil fuel use by 70% clean energy by 2030 with 30% from efficiency measures and 40% coming from locally generated renewable sources [4]. In 2009, Hawaii consumed 269.8 Trillion Btu, (249.8 Trillion Btu from non-renewable energy and 20 Trillion Btu from renewable energies) [5]. The 20 Trillion Btu of renewable energies is further broken down into: 4.4% from biomass, 0.4% from hydropower, 1% from wind, 0.6% from geothermal and 1% from solar [5]. The grid-tied photovoltaic (PV) system is one way of harnessing solar energy which is growing in popularity among residential applications.
Grid-tied PV systems are a convenient renewable energy option available for residential applications in Hawaii for its scalability factor as well as the lack of an environmental impact assessment (EIA) that is required for larger renewable energies like wind, geothermal and hydroelectric powers. Residential grid-tied PV systems are composed of solar panels or PV modules that convert the solar energy to electricity which are connected to the grid via a conditioning system (inverters) as illustrated in Figure 1. Hawaii has recently seen a drastic increase in residential PV installations as a result of high electric rates and substantial tax credit incentives. Micro-inverter technology is the popular choice for the residential or small capacity systems (<10 kW).
This thesis presents the design, fabrication, testing and analysis from the data…
Subjects/Keywords: grid-tied photovoltaic micro-inverters
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APA (6th Edition):
Torres, J. S. (2016). Performance analysis of grid-tied photovoltaic micro-inverters. (Thesis). University of Hawaii – Manoa. Retrieved from http://hdl.handle.net/10125/101858
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Torres, Jordan Shoichi. “Performance analysis of grid-tied photovoltaic micro-inverters.” 2016. Thesis, University of Hawaii – Manoa. Accessed March 01, 2021.
http://hdl.handle.net/10125/101858.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Torres, Jordan Shoichi. “Performance analysis of grid-tied photovoltaic micro-inverters.” 2016. Web. 01 Mar 2021.
Vancouver:
Torres JS. Performance analysis of grid-tied photovoltaic micro-inverters. [Internet] [Thesis]. University of Hawaii – Manoa; 2016. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/10125/101858.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Torres JS. Performance analysis of grid-tied photovoltaic micro-inverters. [Thesis]. University of Hawaii – Manoa; 2016. Available from: http://hdl.handle.net/10125/101858
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of New South Wales
2.
Wang, Yunqi.
Transients in Electricity Networks with Distributed Generation.
Degree: Electrical Engineering & Telecommunications, 2015, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/54266
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:13762/SOURCE02?view=true
► Micro-grids are becoming very popular due to the plug-and-play nature of their integration. However, the high penetration of distributed generators (DGs) may also create potential…
(more)
▼ Micro-grids are becoming very popular due to the plug-and-play nature of their integration. However, the high penetration of distributed generators (DGs) may also create potential instability due to the special characteristics of DG units and their low inertia. With the increase of DG penetration level, the overall dynamics of the power system may become significantly impaired. Thus, the increasing penetration of distributed generation into the electricity network presents new challenges for reliable operation of the whole system.This thesis investigates the
micro-
grid dynamic performance caused by different kinds of common disturbances such as sudden switching of Photovoltaic (PV) source, loss of a large system load and three-phase fault. The simulations and experiments are conducted in different
micro-
grid configurations. The critical clearing time (CCT) of the
micro-
grid under the three-phase fault condition is also discussed.The research results, from both computer simulations and laboratory experiments, show that the
micro-
grid transient performance is affected by a number of factors including
micro-
grid operation mode, energy storage capacity, DG penetration level and disturbance level. It is shown that the application of distributed generation can help enhance the
micro-
grid transient performance. However, it is difficult for the
micro-
grid to maintain stability under a disturbance without any energy storage as the characteristics of the DG make it incapable to adjust the system parameters during the transient. The DG power output may reduce, and in the worst situation, the protection will operate to isolate the DG from the
micro-
grid. This will lead to a loss of power generation and result in a more serious disturbance in the
grid. The application of battery storage can improve the
micro-
grid transient performance considerably. The power rush can be absorbed by this device and the
micro-
grid dynamic response is substantially improved. However, the disturbance in the
micro-
grid is unpredictable and it is difficult to determine the capacity and location of the storage device, which are the two main factors that will affect the battery performance.The research also shows that the CCT of the
micro-
grid with multiple DGs is different from the traditional network with only synchronous generators. The CCT is affected by the DG penetration level, wind turbine protection insertion time and battery storage capacity level.
Advisors/Committee Members: Phung, Toan, Electrical Engineering & Telecommunications, Faculty of Engineering, UNSW, Ravishankar, Jayashri, Electrical Engineering & Telecommunications, Faculty of Engineering, UNSW.
Subjects/Keywords: Stability; Micro-grid; Transient
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APA (6th Edition):
Wang, Y. (2015). Transients in Electricity Networks with Distributed Generation. (Masters Thesis). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/54266 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:13762/SOURCE02?view=true
Chicago Manual of Style (16th Edition):
Wang, Yunqi. “Transients in Electricity Networks with Distributed Generation.” 2015. Masters Thesis, University of New South Wales. Accessed March 01, 2021.
http://handle.unsw.edu.au/1959.4/54266 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:13762/SOURCE02?view=true.
MLA Handbook (7th Edition):
Wang, Yunqi. “Transients in Electricity Networks with Distributed Generation.” 2015. Web. 01 Mar 2021.
Vancouver:
Wang Y. Transients in Electricity Networks with Distributed Generation. [Internet] [Masters thesis]. University of New South Wales; 2015. [cited 2021 Mar 01].
Available from: http://handle.unsw.edu.au/1959.4/54266 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:13762/SOURCE02?view=true.
Council of Science Editors:
Wang Y. Transients in Electricity Networks with Distributed Generation. [Masters Thesis]. University of New South Wales; 2015. Available from: http://handle.unsw.edu.au/1959.4/54266 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:13762/SOURCE02?view=true
Delft University of Technology
3.
Eroglu, Ibrahim (author).
AC/DC and hybrid microgrid comparison for a waterpump system.
Degree: 2019, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:90b1f6f9-ab8e-4fa2-b0d4-ecdc78010512
► In this thesis, the main objective is to argue and address the best fitting micro grid electric distribution system for a typical water-pump systems whereby…
(more)
▼ In this thesis, the main objective is to argue and address the best fitting micro grid electric distribution system for a typical water-pump systems whereby the primary energy sources is renewable. So far, the grid whose main sources were wind, fossil fuel and solar energy has achieved the energy supply for the pump located at 51° 26’ 58” N and 4° 13’ 41” E. Seasonal changes were taken into consideration when carrying out the analyzes in the study from both perspectives; the load side and the energy sources. Energy efficiency is analyzed and compared across multiple types of micro grid distribution systems, and the raw data are processed by HOMER program and the results are deduced as such. The study consists of various grid configurations. Each grid configuration (AC, DC and hybrid AC/DC) is also analyzed by assuming that all three main energy sources are connected to the micro grid. The system performance is also analyzed with 50% load increase in the AC-DC hybrid network. Besides, each grid configuration was re-analyzed using multiple types wind turbine and PV panels and the results were depicted. In Rilland-Netherlands, which was the selected pilot area, solar energy technologies are not utilized sufficiently because the solar energy potential is low. Therefore, most of the energy is supplied by wind power generation systems. For this region, energy surplus produced could be stored in batteries. However, this is not an option due to the cost and technical constraints. According to the analysis results obtained via the HOMER program, the most appropriate solution is to use a hybrid micro grid whose energy source is renewable and it is Grid-Connected. In this regard, the Grid/PV/wind renewable hybrid in a hybrid AC/DC micro-grid system is the most suitable one for the selected pilot area Rilland-Netherlands.
Electrical Sustainable Energy
Advisors/Committee Members: Ferreira, Bram (mentor), van Heese, Peter (mentor), Rueda Torres, Jose (graduation committee), Dong, Jianfei (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: AC micro-grid; DC micro-grid; Hybrid AC/DC micro-grid; PV Systems; Wind; Productivity analysis; Energy production
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APA (6th Edition):
Eroglu, I. (. (2019). AC/DC and hybrid microgrid comparison for a waterpump system. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:90b1f6f9-ab8e-4fa2-b0d4-ecdc78010512
Chicago Manual of Style (16th Edition):
Eroglu, Ibrahim (author). “AC/DC and hybrid microgrid comparison for a waterpump system.” 2019. Masters Thesis, Delft University of Technology. Accessed March 01, 2021.
http://resolver.tudelft.nl/uuid:90b1f6f9-ab8e-4fa2-b0d4-ecdc78010512.
MLA Handbook (7th Edition):
Eroglu, Ibrahim (author). “AC/DC and hybrid microgrid comparison for a waterpump system.” 2019. Web. 01 Mar 2021.
Vancouver:
Eroglu I(. AC/DC and hybrid microgrid comparison for a waterpump system. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Mar 01].
Available from: http://resolver.tudelft.nl/uuid:90b1f6f9-ab8e-4fa2-b0d4-ecdc78010512.
Council of Science Editors:
Eroglu I(. AC/DC and hybrid microgrid comparison for a waterpump system. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:90b1f6f9-ab8e-4fa2-b0d4-ecdc78010512
Texas A&M University
4.
Haider, Sajjad.
Energy Security and Resiliency for the Texas National Guard.
Degree: MS, Energy, 2018, Texas A&M University
URL: http://hdl.handle.net/1969.1/174148
► The Texas Military Department (TMD) faces energy security issues due to the dependency of electricity from the grid that can be disrupted in case of…
(more)
▼ The Texas Military Department (TMD) faces energy security issues due to the dependency of electricity from the
grid that can be disrupted in case of a natural disaster like Hurricane Harvey hitting Texas. This motivates us to generate electricity at the location using locally available renewable sources, reducing TMDs dependency on the
grid and giving a sense of energy security. The fall in the price of renewable energy over the last few years makes them a suitable candidate for harnessing greener energy and establishing an independent
micro grid. Most of these renewable energy sources are intermittent in nature which takes our focus on storage options, along with greater reliance on more reliable energy sources such as biomass and natural gas.
This study targets the electricity consumption of Camp Swift on an annual basis. From the optimization results we can learn that we can produce over 40% of the energy through renewable sources which is which is higher than the state average of 18%. This results in a total cost of about 2.7 million USD out of which about 62000 USD is kept for running costs while 2.33 million USD is the expected cost of setting up this
grid. By using Biomass and Natural Gas, in conjunction with Solar and a Diesel Generator, the system is able to produce 5.5 million kWh of electricity against annual demand of less than 2 million kWh which can be used to sell electricity back to the
grid in the event of a
grid failure or via net metering enabled smart meters.
Advisors/Committee Members: Walewski, Dr. John (advisor), Damnajovic, Dr. Ivan (committee member), Balog, Dr. Robert (committee member).
Subjects/Keywords: Energy; resilience; micro-grid; renewable; optimization
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APA (6th Edition):
Haider, S. (2018). Energy Security and Resiliency for the Texas National Guard. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/174148
Chicago Manual of Style (16th Edition):
Haider, Sajjad. “Energy Security and Resiliency for the Texas National Guard.” 2018. Masters Thesis, Texas A&M University. Accessed March 01, 2021.
http://hdl.handle.net/1969.1/174148.
MLA Handbook (7th Edition):
Haider, Sajjad. “Energy Security and Resiliency for the Texas National Guard.” 2018. Web. 01 Mar 2021.
Vancouver:
Haider S. Energy Security and Resiliency for the Texas National Guard. [Internet] [Masters thesis]. Texas A&M University; 2018. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/1969.1/174148.
Council of Science Editors:
Haider S. Energy Security and Resiliency for the Texas National Guard. [Masters Thesis]. Texas A&M University; 2018. Available from: http://hdl.handle.net/1969.1/174148
University of California – San Diego
5.
Gu, Tianhao.
An Evaluation on the Cost Efficiency of Wind and Solar Hybrid Power System.
Degree: Engineering Sciences (Mechanical Engineering), 2017, University of California – San Diego
URL: http://www.escholarship.org/uc/item/6tm1w78r
► Solar energy generation is intermittent due to the limitation of night time and weather, so batteries are normally used to stabilize the solar energy output…
(more)
▼ Solar energy generation is intermittent due to the limitation of night time and weather, so batteries are normally used to stabilize the solar energy output in the distributed generation system. However, batteries are still expensive and have relatively short life span. The motivation of this research is to evaluate if wind energy can be a more cost efficient solution to replace battery storage. An algorithm is created to analyze the solar irradiance, wind speed and load data from two different cities, Atlantic City and San Diego. Then find the most cost efficient renewable energy solution for each city under different renewable energy penetration level. The result shows that the wind energy is not a good substitution for battery. The solar and wind hybrid system can reach higher renewable energy penetration level, but the cost of the system and the wasted energy percentage is also extremely high. In San Diego, the integration of wind energy does not bring any economic benefit to the solar system. In Atlantic City, where the wind energy resource is abundant, adding wind turbines to the solar battery system can lower the system cost while maintaining the same level of renewable energy penetration.
Subjects/Keywords: Energy; Social psychology; Micro Grid; Solar; Wind
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APA (6th Edition):
Gu, T. (2017). An Evaluation on the Cost Efficiency of Wind and Solar Hybrid Power System. (Thesis). University of California – San Diego. Retrieved from http://www.escholarship.org/uc/item/6tm1w78r
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Gu, Tianhao. “An Evaluation on the Cost Efficiency of Wind and Solar Hybrid Power System.” 2017. Thesis, University of California – San Diego. Accessed March 01, 2021.
http://www.escholarship.org/uc/item/6tm1w78r.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Gu, Tianhao. “An Evaluation on the Cost Efficiency of Wind and Solar Hybrid Power System.” 2017. Web. 01 Mar 2021.
Vancouver:
Gu T. An Evaluation on the Cost Efficiency of Wind and Solar Hybrid Power System. [Internet] [Thesis]. University of California – San Diego; 2017. [cited 2021 Mar 01].
Available from: http://www.escholarship.org/uc/item/6tm1w78r.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Gu T. An Evaluation on the Cost Efficiency of Wind and Solar Hybrid Power System. [Thesis]. University of California – San Diego; 2017. Available from: http://www.escholarship.org/uc/item/6tm1w78r
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
6.
Haque, Md. Emdadul.
Design of a Self-sufficient Micro-Grid with Renewable Energy Production.
Degree: 2013, , Department of Communication Systems
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-5270
► In power development technology there are pioneering various μ-grid concepts, that integrating multiple distributed power generation sources into a small network serving some or…
(more)
▼ In power development technology there are pioneering various μ-grid concepts, that integrating multiple distributed power generation sources into a small network serving some or all of the energy needs of participating users can provide benefits including reduced energy costs, increased overall energy efficiency and improved environmental performance and local electric system reliability. In the fast progression of technology the electric vehicles, electric construction equipment and machinery such as- road building or quarries would greatly benefited from electrification and the by this revolutions, they able defending the environment from detrimental effect and potential energy (and local emission) reduction is sufficient. These types of sites are often remotely located and it is much costly to meet the high voltage utility grid or distribution grid, which are normally far-off from the sites. Hence, it would be advantageous to be able to set up such sites without having to build long and expensive connections to high voltage transmission and distribution grids. In this project we have design and proposed a self-sufficient smart DC micro-grid providing renewable energy resources to supply electric machinery is designed. This grid is capable of meeting energy as well as peak power demands of machine site while offering the possibility to fully rely on locally produced renewable energy. In this project we have included price and performance forecasting for solar and wind energy, charger, grid energy storage system and micro-grid power electronics. Therefore, with this design it is capable to provide efficient power supply to the site and can meet the demand at peak loads. Grid modeling and simulating results (including loads, storage and energy production) are done by MATLAB.
+8801717142518
Subjects/Keywords: Micro Grid; Renewable energy; Wind Turbine
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APA (6th Edition):
Haque, M. E. (2013). Design of a Self-sufficient Micro-Grid with Renewable Energy Production. (Thesis). , Department of Communication Systems. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:bth-5270
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Haque, Md Emdadul. “Design of a Self-sufficient Micro-Grid with Renewable Energy Production.” 2013. Thesis, , Department of Communication Systems. Accessed March 01, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:bth-5270.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Haque, Md Emdadul. “Design of a Self-sufficient Micro-Grid with Renewable Energy Production.” 2013. Web. 01 Mar 2021.
Vancouver:
Haque ME. Design of a Self-sufficient Micro-Grid with Renewable Energy Production. [Internet] [Thesis]. , Department of Communication Systems; 2013. [cited 2021 Mar 01].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-5270.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Haque ME. Design of a Self-sufficient Micro-Grid with Renewable Energy Production. [Thesis]. , Department of Communication Systems; 2013. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-5270
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Louisiana State University
7.
Lamichhane, Sumiti.
Micro grid stability improvements by employing storage.
Degree: MSEE, Electrical and Computer Engineering, 2012, Louisiana State University
URL: etd-05252012-144155
;
https://digitalcommons.lsu.edu/gradschool_theses/888
► Storage devices can be used in a power gird to store the excess energy when the energy production is high and the demand is low…
(more)
▼ Storage devices can be used in a power gird to store the excess energy when the energy production is high and the demand is low and utilize the stored energy when the produced energy cannot meet the high demands of the consumers. This thesis represents a micro grid consisting of a conventional synchronous generator, as well as renewable energy sources, energy storage, and loads in order to investigate the effective energy flow control and transient stability improvement by employing thermal storage. Thermal storage, unlike electrical one (such as battery) is more environmental friendly, has longer life span, and is more effective in power flow control. In this thesis, resistive and heat pump type thermal storage are proposed and its stability effects on micro grids are evaluated. A suitable model is developed for the thermal storage and the grid’s stability analysis is adopted by using linearization methods. Consequently, by designing an optimal controller for the storage the stability of the micro grid is improved as verified through the simulations.
Subjects/Keywords: micro grid; storage; battery; thermal storage; stability
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APA (6th Edition):
Lamichhane, S. (2012). Micro grid stability improvements by employing storage. (Masters Thesis). Louisiana State University. Retrieved from etd-05252012-144155 ; https://digitalcommons.lsu.edu/gradschool_theses/888
Chicago Manual of Style (16th Edition):
Lamichhane, Sumiti. “Micro grid stability improvements by employing storage.” 2012. Masters Thesis, Louisiana State University. Accessed March 01, 2021.
etd-05252012-144155 ; https://digitalcommons.lsu.edu/gradschool_theses/888.
MLA Handbook (7th Edition):
Lamichhane, Sumiti. “Micro grid stability improvements by employing storage.” 2012. Web. 01 Mar 2021.
Vancouver:
Lamichhane S. Micro grid stability improvements by employing storage. [Internet] [Masters thesis]. Louisiana State University; 2012. [cited 2021 Mar 01].
Available from: etd-05252012-144155 ; https://digitalcommons.lsu.edu/gradschool_theses/888.
Council of Science Editors:
Lamichhane S. Micro grid stability improvements by employing storage. [Masters Thesis]. Louisiana State University; 2012. Available from: etd-05252012-144155 ; https://digitalcommons.lsu.edu/gradschool_theses/888
University of New South Wales
8.
Wang, Yunqi.
Detection and Classification of Disturbances in Islanded Micro-grid.
Degree: Electrical Engineering & Telecommunications, 2018, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/61517
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:56398/SOURCE02?view=true
► Micro-grids are envisaged as single plug-and-play electrical systems that can operate either in grid-connected or islanded modes. Their main sources of power are renewable and…
(more)
▼ Micro-grids are envisaged as single plug-and-play electrical systems that can operate either in
grid-connected or islanded modes. Their main sources of power are renewable and are usually integrated through power electronic devices. These present new challenges to reliable operation of the system due to their inherent incapability to regulate the system. Power quality (PQ) disturbances in the
micro-
grid make it further vulnerable, especially when the
micro-
grid operates in an islanded mode. The PQ disturbances only occur for a few cycles and cannot be easily detected directly in the time domain.This thesis utilizes wavelet transformation (WT) method to detect and analyse the disturbance signals in the islanded
micro-
grid. The signals are collected from both simulation and experimental setup. The wavelet-based and time domain based feature extraction algorithms are investigated and compared. Factors that can affect the performance of these methods are discussed. Furthermore, three different types of wavelet-based feature extraction methods are also tested and two of them – normilized Renyi entropy with signal energy and normalized Renyi entropy with distribution volume, are algorithms which have not been applied into the power system before.The results show that the disturbances created by using simulated data are successfully identified using wavelet transformation. The variation of wavelet coefficients helps in identifying the time and duration of the disturbances. However, when data from the
micro-
grid laboratory setup is used, the performance of the WT is not satisfactory due to presence of noise and harmonics. Although, single disturbances such as voltage sag, swell and interruption can still be identified and classified, the WT is unable to detect and classify multiple disturbances, especially when non-linear loads are involved. The presence of non-linear loads in islanded
micro-grids, increases the fluctuations of the WT coefficients, thus making the disturbance signals to be buried.To overcome this issue, the Renyi entropy is used to improve the performance of WT. A comparison is made between the time-domain Renyi and wavelet-based Renyi. The results show that the wavelet-based Renyi has improved efficiency. Two normalized Renyi entropies are also investigated and compared with the normal Renyi entropy, to overcome the problem whereby Renyi entropy fails to detect zero-mean cross-terms in some cases when odd is used, as well as to reduce the distribution to the unity signal energy case. These two algorithms are found to show higher accuracy and efficiency for classifying multiple disturbances in an islanded
micro-
grid.
Advisors/Committee Members: Ravishankar, Jayashri, Electrical Engineering & Telecommunications, Faculty of Engineering, UNSW, Phung, Toan, Electrical Engineering & Telecommunications, Faculty of Engineering, UNSW.
Subjects/Keywords: Feature extraction; Power quality; Micro-grid
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APA (6th Edition):
Wang, Y. (2018). Detection and Classification of Disturbances in Islanded Micro-grid. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/61517 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:56398/SOURCE02?view=true
Chicago Manual of Style (16th Edition):
Wang, Yunqi. “Detection and Classification of Disturbances in Islanded Micro-grid.” 2018. Doctoral Dissertation, University of New South Wales. Accessed March 01, 2021.
http://handle.unsw.edu.au/1959.4/61517 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:56398/SOURCE02?view=true.
MLA Handbook (7th Edition):
Wang, Yunqi. “Detection and Classification of Disturbances in Islanded Micro-grid.” 2018. Web. 01 Mar 2021.
Vancouver:
Wang Y. Detection and Classification of Disturbances in Islanded Micro-grid. [Internet] [Doctoral dissertation]. University of New South Wales; 2018. [cited 2021 Mar 01].
Available from: http://handle.unsw.edu.au/1959.4/61517 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:56398/SOURCE02?view=true.
Council of Science Editors:
Wang Y. Detection and Classification of Disturbances in Islanded Micro-grid. [Doctoral Dissertation]. University of New South Wales; 2018. Available from: http://handle.unsw.edu.au/1959.4/61517 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:56398/SOURCE02?view=true
Humboldt State University
9.
Quetchenbach, Thomas.
Implementation of a low-cost smart grid device to prevent brownouts in village micro-hydro systems.
Degree: 2011, Humboldt State University
URL: http://hdl.handle.net/2148/911
► Brownouts are a common problem in micro-hydro mini-grid systems due to the limited supply of power and the difficulty of restricting usage. The GridShare is…
(more)
▼ Brownouts are a common problem in
micro-hydro mini-
grid systems due to the limited supply of power and the difficulty of restricting usage. The GridShare is a device designed to alleviate brownouts by limiting peak power and encouraging load-shifting to off-peak times. The device is installed at each household???s electrical service entrance and measures voltage and current consumption. Indicator lights inform the customer whether a brownout is occurring; if the customer attempts to use large appliances, such as rice cookers, during a brownout, the GridShare disconnects power to the house until the appliance is turned off. The objective of this master???s degree project was to advance the design of the GridShare device from a prototype to a production design ready for small-scale manufacturing and to manufacture, assemble, and test enough GridShare devices to perform an installation in the village of Rukubji, Bhutan. Based on our testing and a field visit by the GridShare team in June 2010, several changes were made to the circuit design, and several prototype devices were built. To enable the production of 120 GridShare devices, a printed circuit board was designed, allowing automated fabrication and assembly. A comprehensive testing protocol was developed to evaluate the device???s ability to withstand the electrical and environmental conditions at the installation site, including exposure to low voltage and frequency and low and high ambient temperatures. The final version of the GridShare passed all tests; 120 devices were manufactured, shipped to Bhutan, and installed in Rukubji in June 2011. Further work will be needed to assess effectiveness and user satisfaction.
Advisors/Committee Members: Cashman, Eileen.
Subjects/Keywords: Bhutan; GridShare; Micro hydropower; Energy; Rural electrification; Mini-grid; Smart grid; Hydroelectricity; Micro-hydro
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APA (6th Edition):
Quetchenbach, T. (2011). Implementation of a low-cost smart grid device to prevent brownouts in village micro-hydro systems. (Thesis). Humboldt State University. Retrieved from http://hdl.handle.net/2148/911
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Quetchenbach, Thomas. “Implementation of a low-cost smart grid device to prevent brownouts in village micro-hydro systems.” 2011. Thesis, Humboldt State University. Accessed March 01, 2021.
http://hdl.handle.net/2148/911.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Quetchenbach, Thomas. “Implementation of a low-cost smart grid device to prevent brownouts in village micro-hydro systems.” 2011. Web. 01 Mar 2021.
Vancouver:
Quetchenbach T. Implementation of a low-cost smart grid device to prevent brownouts in village micro-hydro systems. [Internet] [Thesis]. Humboldt State University; 2011. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/2148/911.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Quetchenbach T. Implementation of a low-cost smart grid device to prevent brownouts in village micro-hydro systems. [Thesis]. Humboldt State University; 2011. Available from: http://hdl.handle.net/2148/911
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Universidade Federal de Viçosa
10.
Gustavo Azevedo Xavier.
Simulação de micro-redes de energia elétrica com geração fotovoltaica e armazenamento de energia.
Degree: 2011, Universidade Federal de Viçosa
URL: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3828
► No presente trabalho foi simulado e avaliado o uso de energia solar fotovoltaica e seu armazenamento em baterias em sistemas chamados micro-redes. No modelo de…
(more)
▼ No presente trabalho foi simulado e avaliado o uso de energia solar fotovoltaica e seu armazenamento em baterias em sistemas chamados micro-redes. No modelo de micro-rede proposto, consumidores residenciais proprietários de sistemas fotovoltaicos se unem a outros consumidores sem geração própria, de forma que seja possível a comercialização do excedente gerado. Foram estudadas diferentes topologias de micro-redes e analisado o retorno do investimento em diferentes situações.Os dados de radiação simulados estocasticamente, considerando o comportamento estatístico de uma série de 20 anos dos dados de radiação para a cidade de Viçosa, MG para o período de um ano. Com os dados simulados e a modelagem dos geradores fotovoltaicos foi calculada a potência elétrica de saída dos painéis solares. As cargas das residências foram estimadas determinando-se primeiramente os equipamentos elétricos instalados e a seguir foi utilizada uma metodologia para traçar a curva de carga também de maneira estocástica, a fim de simular o mais fielmente possível a curva de carga. Sabendo-se a carga e a quantidade de energia gerada e considerando as baterias completamente carregadas no início das simulações, foi possível realizar o balanço de energia do sistema. Calculando-se a quantidade de energia excedente a cada instante, foram calculados o fluxo de caixa da micro-rede e feitas as análises econômicas para estudar a viabilidade econômica do sistema. As análises mostraram que os preços praticados atualmente no Brasil inviabilizam a utilização da energia solar fotovoltaica. Foram feitas análises de sensibilidade variando alguns parâmetros econômicos para saber em qual situação o investimento será viável. Foram também analisados aspectos estratégicos, ecológicos e de enquadramento tarifário e de legislação que podem vir a colaborar para que sistemas fotovoltaicos de micro redes se tornem viáveis.
In the present work it was simulated and evaluated the use of photovoltaicsolar energy and itsinbattery storage in systems called micro-grids. In the proposed micro-grid model, residential consumers owners of photovoltaic systems unite to other consumers without their owns generations units, so it is possible to trade the surplus generated energy. Different topologies of micro-gridswere studied and analyzed the return on investment in different situations. Stochastic data of radiation were simulated for the city of Viçosa/MG for the period of one year, that is considering the statistic behavior of a series of 20 of years. With simulated data and modeling of photovoltaic generators were calculated the output power of the solar panels. The loads of residentialconsumers were estimated by determining the electrical equipment installed and then was used a methodology for plotting the load stochastically as well, this was done in order to simulate with fidelity the load curve. Knowing the load and the amount of energy generated and considering the batteries fully charged at the beginning of the simulations, it was possible to perform the energy balance of…
Advisors/Committee Members: Delly Oliveira Filho, Roberto Precci Lopes, Paulo Marcos de Barros Monteiro, Antônia Sônia Alves Cardoso Diniz, Aristides Ribeiro, José Helvécio Martins, Tarcisio de Assunção Pizziolo.
Subjects/Keywords: Micro-redes; Energia fotovoltaica; Micro-grid; Photovoltaic energy; ENGENHARIA AGRICOLA
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APA (6th Edition):
Xavier, G. A. (2011). Simulação de micro-redes de energia elétrica com geração fotovoltaica e armazenamento de energia. (Thesis). Universidade Federal de Viçosa. Retrieved from http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3828
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Xavier, Gustavo Azevedo. “Simulação de micro-redes de energia elétrica com geração fotovoltaica e armazenamento de energia.” 2011. Thesis, Universidade Federal de Viçosa. Accessed March 01, 2021.
http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3828.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Xavier, Gustavo Azevedo. “Simulação de micro-redes de energia elétrica com geração fotovoltaica e armazenamento de energia.” 2011. Web. 01 Mar 2021.
Vancouver:
Xavier GA. Simulação de micro-redes de energia elétrica com geração fotovoltaica e armazenamento de energia. [Internet] [Thesis]. Universidade Federal de Viçosa; 2011. [cited 2021 Mar 01].
Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3828.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Xavier GA. Simulação de micro-redes de energia elétrica com geração fotovoltaica e armazenamento de energia. [Thesis]. Universidade Federal de Viçosa; 2011. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3828
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Minnesota
11.
Shah, Jalpa Kaushil.
Dynamic power flow control for a smart micro-grid by a power electronic transformer.
Degree: PhD, Electrical Engineering, 2011, University of Minnesota
URL: http://purl.umn.edu/108278
► A novel strategy, for control of the power flow for a smart micro-grid is proposed. The utility grid power is dynamically controlled by a Power…
(more)
▼ A novel strategy, for control of the power flow for a smart micro-grid is proposed. The
utility grid power is dynamically controlled by a Power Electronic Transformer (PET). A
60 Hz, step-down transformer is generally used at the point of common coupling (PCC),
to connect the micro-grid to the power system grid. Substitution of the conventional 60Hz
transformer, by a PET, results in enhanced micro-grid power management system, during
grid-connected operation. The smart micro-grid is a set of controllable loads and
distributed energy resources (DER); both renewable and non-renewable; that supply
demand of a group of customers. The proposed dynamic power limiter (also referred to as
PET) is a high-frequency, isolated power-converter system, comprised of a highfrequency
step-down transformer and three-phase to single-phase matrix converters. The
matrix converters are modulated with a novel pulse width modulation (PWM) strategy for
a bi-directional power flow control. The output of the matrix converter generates a high
frequency (few kHz) pulsating single phase AC at the primary and secondary of the transformer, which are phase shifted for active power control. The PET also allows
voltage regulation by control of reactive power. The entire system; represented as two,
three-phase AC systems with an intermediate high-frequency transformer; is simulated
using Matlab/Simulink. The equivalent system has utility grid at the input side and a
micro-grid on the output side. The micro-grid is modeled as an interconnected system
consisting of set of DERs and smart loads. The simulation analyzes the change in micro grid’s power generation and consumption in response to the change in its local grid
frequency, upon limiting the utility grid power. The PET hence restores the system
frequency by adjusting supply and demand at the PCC. The micro-grid can now
participate in frequency regulation for the main grid. The simulation results are obtained
to verify the operation and claims of the dynamic power limiter as stated below:
1. Restricted active power flow to the micro-grid, at a desired value determined by
the main utility grid.
2. Utilization of the change in local grid frequency, to dynamically control the active
power generation or consumption within the micro-grid.
3. Decentralized control of the DERs as well as the controllable loads, which operate synchronously, to supply the demand within the micro-grid.
4. Bi-directional active-power flow capability at the PCC.
5. Voltage regulation by control of reactive power.
6. Contribution of the micro-grid components in frequency regulation of the main
grid.
7. Smooth transition from islanding to grid-connected mode of the micro-grid,
without the need of grid synchronization.
8. Extra degree of freedom due to the presence of active-power controller in a
possible deregulation and market strategy within the micro-grid.
Subjects/Keywords: Matrix converter; Micro-grid; Power electronics transformer; Power systems; PWM; Smart grid; Electrical Engineering
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Manager
APA (6th Edition):
Shah, J. K. (2011). Dynamic power flow control for a smart micro-grid by a power electronic transformer. (Doctoral Dissertation). University of Minnesota. Retrieved from http://purl.umn.edu/108278
Chicago Manual of Style (16th Edition):
Shah, Jalpa Kaushil. “Dynamic power flow control for a smart micro-grid by a power electronic transformer.” 2011. Doctoral Dissertation, University of Minnesota. Accessed March 01, 2021.
http://purl.umn.edu/108278.
MLA Handbook (7th Edition):
Shah, Jalpa Kaushil. “Dynamic power flow control for a smart micro-grid by a power electronic transformer.” 2011. Web. 01 Mar 2021.
Vancouver:
Shah JK. Dynamic power flow control for a smart micro-grid by a power electronic transformer. [Internet] [Doctoral dissertation]. University of Minnesota; 2011. [cited 2021 Mar 01].
Available from: http://purl.umn.edu/108278.
Council of Science Editors:
Shah JK. Dynamic power flow control for a smart micro-grid by a power electronic transformer. [Doctoral Dissertation]. University of Minnesota; 2011. Available from: http://purl.umn.edu/108278
Louisiana State University
12.
Kazemlou, Shaghayegh.
Discrete time modeling and control of DC/DC switching converter for solar energy systems.
Degree: MS, Electrical and Computer Engineering, 2013, Louisiana State University
URL: etd-10092013-142149
;
https://digitalcommons.lsu.edu/gradschool_theses/422
► Distributed generation networks including micro grids benefit from solar cells that are controlled by dc-dc converters. In this research a nonlinear discrete-time model for a…
(more)
▼ Distributed generation networks including micro grids benefit from solar cells that are controlled by dc-dc converters. In this research a nonlinear discrete-time model for a buck converter tied to a solar system is derived with unknown internal dynamics. Then, adaptive neural network (NN) controller is employed to enhance stability of dc-dc converter connected to grid-tie inverter (GTI) in the presence of power system disturbances. The NN weights are tuned online by using a novel update law. By using Lyapunov techniques, all signals can be shown to be uniformly ultimately bounded (UUB). In addition, the interaction of the converter with the GTI is investigated to assure stability of the entire interconnected system while the GTI is controlled via a novel stabilizer similar to power system stabilizer (PSS). The proposed nonlinear discrete-time converter controller along with the GTI, equipped with PSS, is simulated in Matlab Simulink environment. The results have highlighted the effectiveness of the proposed modeling and controller design.
Subjects/Keywords: Solar Energy Source; Grid-Tie Inverter; Micro Grid; Discrete-Time Controller; Neural Network; Switching Converter
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kazemlou, S. (2013). Discrete time modeling and control of DC/DC switching converter for solar energy systems. (Masters Thesis). Louisiana State University. Retrieved from etd-10092013-142149 ; https://digitalcommons.lsu.edu/gradschool_theses/422
Chicago Manual of Style (16th Edition):
Kazemlou, Shaghayegh. “Discrete time modeling and control of DC/DC switching converter for solar energy systems.” 2013. Masters Thesis, Louisiana State University. Accessed March 01, 2021.
etd-10092013-142149 ; https://digitalcommons.lsu.edu/gradschool_theses/422.
MLA Handbook (7th Edition):
Kazemlou, Shaghayegh. “Discrete time modeling and control of DC/DC switching converter for solar energy systems.” 2013. Web. 01 Mar 2021.
Vancouver:
Kazemlou S. Discrete time modeling and control of DC/DC switching converter for solar energy systems. [Internet] [Masters thesis]. Louisiana State University; 2013. [cited 2021 Mar 01].
Available from: etd-10092013-142149 ; https://digitalcommons.lsu.edu/gradschool_theses/422.
Council of Science Editors:
Kazemlou S. Discrete time modeling and control of DC/DC switching converter for solar energy systems. [Masters Thesis]. Louisiana State University; 2013. Available from: etd-10092013-142149 ; https://digitalcommons.lsu.edu/gradschool_theses/422
Queens University
13.
Li, Yang.
An Efficient Demand-Side Load Shedding Algorithm in Smart Grid
.
Degree: Electrical and Computer Engineering, 2013, Queens University
URL: http://hdl.handle.net/1974/8333
► Rapid advances in the smart grid technology are making it possible to tackle a lot of problems in the aged power systems. High-speed data acquisition…
(more)
▼ Rapid advances in the smart grid technology are making it possible to tackle a lot of problems in the aged power systems. High-speed data acquisition system, high-voltage power electronic equipment, advanced utility and customer interaction technologies, as well as distributed renewable generation are enabling the revolution in the electric power generation, delivery and distribution. Through the implementation of ubiquitous metering and communication networks, the customers would no longer be a passive receiver of the electrical energy, but instead, an active participant in the power system and electricity market. They can not only sell their own energy to the utility, but also take part in the emergency restoration in the power grid. Nonetheless, some technical barriers are encountered during this revolution, such as difficulties in integrating home automation, smart metering, customer interaction and power system operation into the whole system.
This thesis proposes a customer involved load shedding algorithm for both the power system frequency control and the micro-grid islanding. This new algorithm possesses the features of centralized load control and distributed load control, which fully utilizes the advantages of hierarchical communication networks along with the home automation. The proposed algorithm considers the reliability of the power grid as well as the comfort of the electricity users. In the power distribution system, the high-level control centre is responsible for coordinating the local load controllers, whilst the local controller takes charge of frequency monitoring and decision making. In the micro-grid, a centralized control strategy is adopted to better serve the system with the wide set of information available at the micro-grid control centre. The simulation results have demonstrated the correctness and feasibility of the proposed algorithm. Finally, the hardware implementation further tests the validity of the wireless sensor networks serving as the system’s monitoring and communication technology.
Subjects/Keywords: Wireless Sensor Network
;
Demand Response
;
Load Shedding
;
Micro-Grid Islanding
;
Smart Grid
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Li, Y. (2013). An Efficient Demand-Side Load Shedding Algorithm in Smart Grid
. (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/8333
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Li, Yang. “An Efficient Demand-Side Load Shedding Algorithm in Smart Grid
.” 2013. Thesis, Queens University. Accessed March 01, 2021.
http://hdl.handle.net/1974/8333.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Li, Yang. “An Efficient Demand-Side Load Shedding Algorithm in Smart Grid
.” 2013. Web. 01 Mar 2021.
Vancouver:
Li Y. An Efficient Demand-Side Load Shedding Algorithm in Smart Grid
. [Internet] [Thesis]. Queens University; 2013. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/1974/8333.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Li Y. An Efficient Demand-Side Load Shedding Algorithm in Smart Grid
. [Thesis]. Queens University; 2013. Available from: http://hdl.handle.net/1974/8333
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
14.
Nasr, Sarah.
Optimisation d’un réseau ferroviaire à l’aide de solutions smart-grids : Optimization of railway network using smart-grid solutions.
Degree: Docteur es, Génie électrique, 2016, Université Paris-Saclay (ComUE)
URL: http://www.theses.fr/2016SACLC026
► L'amélioration de l'efficacité énergétique est devenue aujourd'hui une nécessité dans tous les domaines techniques. La réduction de la consommation, et donc du bilan carbone, est…
(more)
▼ L'amélioration de l'efficacité énergétique est devenue aujourd'hui une nécessité dans tous les domaines techniques. La réduction de la consommation, et donc du bilan carbone, est placée parmi les priorités mondiales tel que le paquet énergie-climat 2020 de l'Union Européenne.Les systèmes ferroviaires font partie des plus grands consommateurs d'énergie. Des solutions électriques sont développées pour réduire les pertes dans ces systèmes, optimiser la consommation et donc réduire la facture énergétique globale. Étant donné la diversité de ces systèmes, deux catégories principales sont considérées. La première regroupe les lignes urbaines caractérisées par une électrification en mode DC et un trafic relativement dense. Dans ce cas, l'énergie de freinage brûlée dans les rhéostats des trains constitue une perte considérable. La solution proposée consiste à récupérer cette énergie à l'aide d'un DC micro-grid installé dans une station passager. Elle permettra une interaction avec son environnement non-ferroviaire comme par exemple réutiliser cette énergie pour charger des bus électriques hybrides stationnant à proximité. Ce micro-grid contient un premier convertisseur DC/DC qui récupère l’excès d'énergie de freinage d'un train et l'injecte dans un DC busbar. Un deuxième convertisseur DC/DC va ensuite la stocker dans un système de stockage hybride pour que le bus électrique puisse se charger une fois branché au DC busbar. Le micro-grid est relié au réseau par un onduleur réversible AC/DC de faible puissance. L'ensemble est géré localement par un système gestion de puissance. Une évaluation énergétique montre que cette solution est intéressante lorsqu’un investissement, station de charge, est nécessaire pour charger les bus. En plus, dans le cas du DC micro-grid, aucun contrat avec le fournisseur d’électricité n’est nécessaire. La stabilité du système est aussi étudiée et une commande de stabilisation, le backstepping, est appliquée. Ce nouveau concept d’une future station intelligente permettra au système ferroviaire de communiquer avec son environnement qui est en pleine évolution.La deuxième catégorie est constituée par les lignes régionales et les lignes à grandes vitesses fonctionnant en mode AC. Contrairement au cas précédent, l’excès d’énergie de freinage est renvoyé à travers les sous-stations d’alimentation. Par conséquence, une deuxième solution propose la réduction de la consommation totale par l’optimisation du profile de vitesse de chaque train et la synchronisation de la grille horaire. Ceci est réalisé à l’aide d’un algorithme d’évolution différentielle. Chaque profile de vitesse est découpé en zones auxquelles sont attribuées des paramètres de conduite. L'optimisation de ces derniers permet de générer un nouveau profile de conduite optimal. Les résultats montrent la possibilité de faire des économies d’énergie tout en respectant la ponctualité des trains.
Increasing energy efficiency is nowadays a requirement in all technical fields. The reduction of global consumption, thus carbon footprint, has become the…
Advisors/Committee Members: Sadarnac, Daniel (thesis director), Iordache, Marius (thesis director), Petit, Marc (thesis director).
Subjects/Keywords: Ferroviaire; DC Micro-Grid; Freinage électrique; Efficacité énergétique; Grille-horaire; Railway; DC Micro-Grid; Electric braking; Energy efficiency; Timetable
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APA ·
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MLA ·
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Nasr, S. (2016). Optimisation d’un réseau ferroviaire à l’aide de solutions smart-grids : Optimization of railway network using smart-grid solutions. (Doctoral Dissertation). Université Paris-Saclay (ComUE). Retrieved from http://www.theses.fr/2016SACLC026
Chicago Manual of Style (16th Edition):
Nasr, Sarah. “Optimisation d’un réseau ferroviaire à l’aide de solutions smart-grids : Optimization of railway network using smart-grid solutions.” 2016. Doctoral Dissertation, Université Paris-Saclay (ComUE). Accessed March 01, 2021.
http://www.theses.fr/2016SACLC026.
MLA Handbook (7th Edition):
Nasr, Sarah. “Optimisation d’un réseau ferroviaire à l’aide de solutions smart-grids : Optimization of railway network using smart-grid solutions.” 2016. Web. 01 Mar 2021.
Vancouver:
Nasr S. Optimisation d’un réseau ferroviaire à l’aide de solutions smart-grids : Optimization of railway network using smart-grid solutions. [Internet] [Doctoral dissertation]. Université Paris-Saclay (ComUE); 2016. [cited 2021 Mar 01].
Available from: http://www.theses.fr/2016SACLC026.
Council of Science Editors:
Nasr S. Optimisation d’un réseau ferroviaire à l’aide de solutions smart-grids : Optimization of railway network using smart-grid solutions. [Doctoral Dissertation]. Université Paris-Saclay (ComUE); 2016. Available from: http://www.theses.fr/2016SACLC026
NSYSU
15.
Lee, Yih-Der.
The Operation and Control of Micro-grid Systems with Dispersed Generation.
Degree: PhD, Electrical Engineering, 2009, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0805109-163008
► This dissertation is to design the operation strategy and protective scheme of micro-grid systems with dispersed generation (DG). The industrial power system with cogeneration units…
(more)
▼ This dissertation is to design the operation strategy and protective scheme of
micro-
grid systems with dispersed generation (DG). The industrial power system with cogeneration units and the distribution feeder with wind power generators were selected as the study
micro-grids for computer simulation. The mathematical models of cogeneration units and wind generators were included in the computer simulation by considering the operation control modes of DGs. The
micro-
grid systems and the nearby utility networks were constructed to solve the power flows of the
micro-grids with various operation scenarios of power generation and load demand. For the severe external fault contingencies, the
micro-grids have to be isolated from the utility power system in time to prevent the tripping of critical loads and DGs. By considering the fault ride through capability of cogenerators and voltage tolerance curves of critical loads, the critical tripping time (CTT) of tie circuit breaker of the
micro-grids was determined according to the transient stability analysis. To maintain the stable operation of the
micro-grids after tie line tripping, the load shedding scheme was designed by applying the under frequency and under voltage relays to disconnect the proper amount of non-critical loads according to the governor responses of cogeneration units.
For the
micro-
grid of distribution feeder with wind power generator, the STATCOM was used to provide adaptive reactive power compensation for the mitigation of voltage fluctuation due to the variation of wind speed and feeder loading. The STATCOM can also be applied for the support of terminal voltage of wind generator (WG) to enhance the transient response of the
micro-
grid. The CTT of tie circuit breaker was determined by considering the low voltage ride through (LVRT) capability and the critical fault cleaning time of WG. To achieve more effective islanding operation of the
micro-grids, the artificial neural network (ANN) was applied to determine the proper timing for tie line tripping and the proper amount of load shedding by using the wind speed, feeder loading and the voltage of
micro-
grid system as the input of ANN. To verify the effectiveness of the proposed tie line tripping and load shedding scheme, different fault contingencies of the external utility network have been simulated by using the computer program for the transient stability analysis. It is found that the critical and voltage sensitive loads of the
micro-
grid can be maintained when the tie circuit breaker is activated to isolate the external fault in time and followed by the execution of load shedding scheme.
Advisors/Committee Members: Chih-Wen Liu (chair), Tsai-Hsiang Chen (chair), Chan-Nan Lu (chair), Cheng-Ting Hsu (chair), Shyh-Jier Huang (chair), Ying-Yi Hong (chair), Chao-Shun Chen (committee member), Li Wang (chair).
Subjects/Keywords: artificial neural network; wind power generation; STATCOM; micro-grid; cogeneration system
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Manager
APA (6th Edition):
Lee, Y. (2009). The Operation and Control of Micro-grid Systems with Dispersed Generation. (Doctoral Dissertation). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0805109-163008
Chicago Manual of Style (16th Edition):
Lee, Yih-Der. “The Operation and Control of Micro-grid Systems with Dispersed Generation.” 2009. Doctoral Dissertation, NSYSU. Accessed March 01, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0805109-163008.
MLA Handbook (7th Edition):
Lee, Yih-Der. “The Operation and Control of Micro-grid Systems with Dispersed Generation.” 2009. Web. 01 Mar 2021.
Vancouver:
Lee Y. The Operation and Control of Micro-grid Systems with Dispersed Generation. [Internet] [Doctoral dissertation]. NSYSU; 2009. [cited 2021 Mar 01].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0805109-163008.
Council of Science Editors:
Lee Y. The Operation and Control of Micro-grid Systems with Dispersed Generation. [Doctoral Dissertation]. NSYSU; 2009. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0805109-163008
16.
Trigueiro dos Santos, Leonardo.
Contribution on the day-ahead and operational optimization for DC microgrid building-integrated : Contribution pour l'optimisation J-1 et opérationnelle d'un micro-réseau DC intégré au bâtiment.
Degree: Docteur es, Génie Électrique : Laboratoire Avenues - GSU (EA-7284), 2017, Compiègne
URL: http://www.theses.fr/2017COMP2352
► Cette recherche se concentre sur l'optimisation d'un micro-réseau en interaction avec le réseau électrique intelligent. Il s'agit de la recherche de solutions optimales pour la…
(more)
▼ Cette recherche se concentre sur l'optimisation d'un micro-réseau en interaction avec le réseau électrique intelligent. Il s'agit de la recherche de solutions optimales pour la conception d'un micro-réseau afin de minimiser les coûts, d'une part, et la possibilité augmenter 1'utilisation des sources renouvelables, d'autre part. La supervision, doit traiter la prise en compte des incertitudes dans la gestion prédictive optimisée des flux de puissance.
This thesis study focuses on a DC microgrid building-integrated satisfying the power balance at the local level and supplying DC loads during both, grid-connected and isolated operation modes. Considering that energy management can be defined as a group of different control strategies and operational practices that together with the new physical equipment and software solutions aims to accomplish the objectives of energy management, the main objective of this thesis is to define the energy management strategies for the building-integrated DC microgrid, aiming to keep the bus voltage stable as well as to reduce the energy cost to the end users and the negative impact to the main grid. Therefore, this research work focuses to optimize and develop the implementation of the designed controller of building-integrated DC microgrid. The proposed DC microgrid consists of PV building-integrated sources, a storage system, a main grid connection for the grid-connected mode and a micro turbine for the off-grid or isolated mode, and a DC load (electric appliances of a tertiary building). The bidirectional connections with the main grid and the storage aim to supply the building’s DC appliances, and sell or store the energy surplus. The results validate the operation of the whole system, ensuring the capability of the proposed supervisory control to manage the energy power flow while ensuring voltage stability. Other goals concern the analyze of the proposed separation between optimization and real time power balance and the usage of the proposed load shedding/restoration algorithm in the microgrid environment are also validate. Regarding the technical contributions, the work of this thesis allowed the creation and the practical development of a test bench for microgrid based on PV sources emulator, which allows the repeatability conditions (closeness of the agreement between the results of successive measurements of the same solar irradiance and air temperature carried out under the same conditions of measurement) and reproducibility (closeness of the agreement between the results of measurements of the same solar irradiation and air temperature carried out under changed conditions of measurement). Numerous experimental tests were carried out and allowed the validation of the proposed concepts.
Advisors/Committee Members: Sechilariu, Manuela (thesis director), Locment, Fabrice (thesis director).
Subjects/Keywords: Micro-réseau; Optimization; Load shedding; Photovoltaic; Microgrid; Smart grid
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APA ·
Chicago ·
MLA ·
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CSE |
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to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Trigueiro dos Santos, L. (2017). Contribution on the day-ahead and operational optimization for DC microgrid building-integrated : Contribution pour l'optimisation J-1 et opérationnelle d'un micro-réseau DC intégré au bâtiment. (Doctoral Dissertation). Compiègne. Retrieved from http://www.theses.fr/2017COMP2352
Chicago Manual of Style (16th Edition):
Trigueiro dos Santos, Leonardo. “Contribution on the day-ahead and operational optimization for DC microgrid building-integrated : Contribution pour l'optimisation J-1 et opérationnelle d'un micro-réseau DC intégré au bâtiment.” 2017. Doctoral Dissertation, Compiègne. Accessed March 01, 2021.
http://www.theses.fr/2017COMP2352.
MLA Handbook (7th Edition):
Trigueiro dos Santos, Leonardo. “Contribution on the day-ahead and operational optimization for DC microgrid building-integrated : Contribution pour l'optimisation J-1 et opérationnelle d'un micro-réseau DC intégré au bâtiment.” 2017. Web. 01 Mar 2021.
Vancouver:
Trigueiro dos Santos L. Contribution on the day-ahead and operational optimization for DC microgrid building-integrated : Contribution pour l'optimisation J-1 et opérationnelle d'un micro-réseau DC intégré au bâtiment. [Internet] [Doctoral dissertation]. Compiègne; 2017. [cited 2021 Mar 01].
Available from: http://www.theses.fr/2017COMP2352.
Council of Science Editors:
Trigueiro dos Santos L. Contribution on the day-ahead and operational optimization for DC microgrid building-integrated : Contribution pour l'optimisation J-1 et opérationnelle d'un micro-réseau DC intégré au bâtiment. [Doctoral Dissertation]. Compiègne; 2017. Available from: http://www.theses.fr/2017COMP2352
Texas A&M University
17.
Harris, William Robert.
Sustainable Rural Microgrid: Engineering and Economics.
Degree: MS, Electrical Engineering, 2017, Texas A&M University
URL: http://hdl.handle.net/1969.1/165748
► Traditional electrification strategies focused on centralized grid expansion are financially infeasible for extending electricity connections to millions of rural households in developing countries. Instead, estimates…
(more)
▼ Traditional electrification strategies focused on centralized
grid expansion are financially infeasible for extending electricity connections to millions of rural households in developing countries. Instead, estimates predict mini-utilities and off-
grid approaches will need to provide electricity to at least 154 million households if universal electrification is to be reached by the target of 2030 set by the United Nations’ Sustainable Energy for All Initiative. Additionally, the large populations within developing countries and predictions of future electricity consumption suggest that fossil fuel-based electrification strategies for these countries would vastly increase the volume of greenhouse gas (GHG) emissions per annum and should be avoided. Renewable technologies such as photovoltaic (PV) arrays, wind turbines, and biomass gasifiers provide sustainable energy alternatives. With the advent of such renewable technologies, DC microgrids are increasingly advantageous compared to AC systems in rural applications, predominantly due to the reduction of AC to DC power conversions and native DC tendency of loads. A holistic methodological approach to designing a miniutility is described in this thesis, including technical, financial, and managerial considerations.
Microgrid architecture topologies are proposed in this thesis, including photovoltaic, biomass gasifier, and wind turbine generators as well as generator hybridization topologies. Rural systems have unique design challenges due to their consumers’ low purchasing power, sparse population density, minimal power consumption and tendency for slow growth. Sizing generators appropriately is paramount. In many cases, detailed renewable resource data may be unavailable, a condition taken into consideration by utilizing publicly available low-resolution global climate datasets from NASA for generator sizing purposes. Power converter topologies are also briefly discussed. As an example, a microgrid topology and business model is constructed for a model village case study using the methodology and architectures described in this thesis. The results of the case study highlight the limitations of minimizing net preset cost as an optimization objective and instead propose maximum average cost to period as an alternative metric for comparison. Additionally, longer loan periods are found to favor capital-intensive microgrid architecture, such as solar and wind technologies.
Advisors/Committee Members: Ehsani, Mehrdad (advisor), Kish, Laszlo (committee member), Xie, Le (committee member), Allaire, Douglas (committee member).
Subjects/Keywords: Rural electrification; microgrid; micro grid; Sustainable energy; renewable energy
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APA ·
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MLA ·
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CSE |
Export
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Manager
APA (6th Edition):
Harris, W. R. (2017). Sustainable Rural Microgrid: Engineering and Economics. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/165748
Chicago Manual of Style (16th Edition):
Harris, William Robert. “Sustainable Rural Microgrid: Engineering and Economics.” 2017. Masters Thesis, Texas A&M University. Accessed March 01, 2021.
http://hdl.handle.net/1969.1/165748.
MLA Handbook (7th Edition):
Harris, William Robert. “Sustainable Rural Microgrid: Engineering and Economics.” 2017. Web. 01 Mar 2021.
Vancouver:
Harris WR. Sustainable Rural Microgrid: Engineering and Economics. [Internet] [Masters thesis]. Texas A&M University; 2017. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/1969.1/165748.
Council of Science Editors:
Harris WR. Sustainable Rural Microgrid: Engineering and Economics. [Masters Thesis]. Texas A&M University; 2017. Available from: http://hdl.handle.net/1969.1/165748
Penn State University
18.
He, Zhanwei.
Sizing and Techno-economic Analysis of Hybrid-Combined Heat and Power -PV- Battery Storage Systems of Commercial and Industrial Buildings.
Degree: 2018, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/15084zuh45
► This paper focuses on simulating hybrid solar energy-combined heat and power-battery storage systems with different sizes, types, and number to determine the optimal system configurations…
(more)
▼ This paper focuses on simulating hybrid solar energy-combined heat and power-battery storage systems with different sizes, types, and number to determine the optimal system configurations with the goal of minimizing life-cycle cost and maximizing fossil energy savings. A
micro-
grid solar photovoltaic generation subsystem operated in parallel with, a gas-fired engine and a battery storage subsystem and operating within a macro-
grid connected environment is modeled. The hybrid system supplies the
micro-
grid system dynamic electrical and thermal demands, which is simulated by HOMER (Hybrid Optimization of Multiple Electric Renewables). In this study, solar energy is to meet the peak
micro-
grid system electrical demand. Considering the fluctuations of solar energy production, the gas-fired engine is used to supply unmet,
micro-
grid electrical demands. The engine is sized with part load operating characteristics to allow excess PV-engine-battery generation for sales back to macro-
grid on high solar flux, high macro-
grid demand days. Because the hybrid system choices could change with key factors variations, this study takes into account some factors, like demand profile from two building types, initial component installment cost, and the energy price to make technical and economic analysis. For instance, commercial and industrial buildings with different electrical and thermal demand profile should be considered separately and decreasing PV system price and fuel price could be an opportunity for hybrid system. Also, the study evaluates the potential impact of dispatch strategies on energy savings and explore the correlations between each operating component size and energy cost.
Advisors/Committee Members: James Freihaut, Thesis Advisor/Co-Advisor, Donghyun Rim, Committee Member, Gregory Scott Pavlak, Committee Member.
Subjects/Keywords: Combined Heat and Power; Micro-grid; solar power; hybrid system; HOMER
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
He, Z. (2018). Sizing and Techno-economic Analysis of Hybrid-Combined Heat and Power -PV- Battery Storage Systems of Commercial and Industrial Buildings. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/15084zuh45
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
He, Zhanwei. “Sizing and Techno-economic Analysis of Hybrid-Combined Heat and Power -PV- Battery Storage Systems of Commercial and Industrial Buildings.” 2018. Thesis, Penn State University. Accessed March 01, 2021.
https://submit-etda.libraries.psu.edu/catalog/15084zuh45.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
He, Zhanwei. “Sizing and Techno-economic Analysis of Hybrid-Combined Heat and Power -PV- Battery Storage Systems of Commercial and Industrial Buildings.” 2018. Web. 01 Mar 2021.
Vancouver:
He Z. Sizing and Techno-economic Analysis of Hybrid-Combined Heat and Power -PV- Battery Storage Systems of Commercial and Industrial Buildings. [Internet] [Thesis]. Penn State University; 2018. [cited 2021 Mar 01].
Available from: https://submit-etda.libraries.psu.edu/catalog/15084zuh45.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
He Z. Sizing and Techno-economic Analysis of Hybrid-Combined Heat and Power -PV- Battery Storage Systems of Commercial and Industrial Buildings. [Thesis]. Penn State University; 2018. Available from: https://submit-etda.libraries.psu.edu/catalog/15084zuh45
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Addis Ababa University
19.
Yohannes, Tesfaye.
APPLICATION OF MICRO-HYDRO PV/BATTERY OFF- GRID HYBRID ENERGY SYSTEM FOR ETHIOPIAN RURAL AREA
.
Degree: 2014, Addis Ababa University
URL: http://etd.aau.edu.et/dspace/handle/123456789/5230
► Ethiopia is a developing country with a total access to electricity not exceeding 41% (in 2012) and the number of household connected to this access…
(more)
▼ Ethiopia is a developing country with a total access to electricity not exceeding 41% (in 2012) and the
number of household connected to this access is 17%. About 85% of the population lives in places where
access to electricity is less than 2%. The village for this study, Mogno Keshenbel Village (8.57
N,
37.45
0
E) has a total population of 4526 and 874 households (CSA, 2007, Guder Wereda Health Office).
The village is about 68km from Guder substation; whicht makes the extension of the
grid not yet practical
and off
grid electrification is the best option for the village. The community in the Mogno Keshenbel
village uses Kerosene for lighting, water for milling and biomass for cooking and dry cells for radios.
Nothing has been done so far in developing the renewable energy resources, such as small-scale hydro,
solar and wind energy in the village.
In this study, feasibility of
micro hydro/PV/battery hybrid electric supply system to the village is analyzed
using HOMER software (hybrid optimization model for electrical renewable) as optimization and
sensitivity analysis tool. The logic behind HOMER selection is that it is proven and worldwide used for
micro power design. Hydro potential of the village is analyzed by measuring the gross head of the river
with the help of GPS (Geographical Position System) and stream flow data obtained from Ministry of
Water, Irrigation and Energy and also Meteorological data of the village is collected from National
Meteorological Agency of Ethiopia and NASA. Surface Metrology is used for the estimation of solar
energy potentials. Electric load for the basic needs of the community, such as, for lighting, radio,
television, ‘injera Mittad”, water pumps, milk processing and flour mills is estimated. One primary school
and one health posts are also considered for the community. Additionally three Protestant churches and
two Orthodox churches also considered. As a result, many feasible hybrid system combinations are
generated, and accordingly, total net present cost (NPC) of the hybrid configuration and cost of energy
(COE) for PV/
micro hydro/ battery hybrid system is 394,819 and 0.044/kWh, respectively, which is
much lower than previously studied
Micro hydro/wind hybrid system and PV/hydro/wind hybrid systems,
and this value is less than the current
grid price of Ethiopian (0.06) [EPCO].
Advisors/Committee Members: Dr - Ing. Edessa Dribssa (advisor).
Subjects/Keywords: Hybrid energy systems;
Photovoltaic;
Micro - hydro;
off - grid system
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APA ·
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MLA ·
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CSE |
Export
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Manager
APA (6th Edition):
Yohannes, T. (2014). APPLICATION OF MICRO-HYDRO PV/BATTERY OFF- GRID HYBRID ENERGY SYSTEM FOR ETHIOPIAN RURAL AREA
. (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/5230
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Yohannes, Tesfaye. “APPLICATION OF MICRO-HYDRO PV/BATTERY OFF- GRID HYBRID ENERGY SYSTEM FOR ETHIOPIAN RURAL AREA
.” 2014. Thesis, Addis Ababa University. Accessed March 01, 2021.
http://etd.aau.edu.et/dspace/handle/123456789/5230.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Yohannes, Tesfaye. “APPLICATION OF MICRO-HYDRO PV/BATTERY OFF- GRID HYBRID ENERGY SYSTEM FOR ETHIOPIAN RURAL AREA
.” 2014. Web. 01 Mar 2021.
Vancouver:
Yohannes T. APPLICATION OF MICRO-HYDRO PV/BATTERY OFF- GRID HYBRID ENERGY SYSTEM FOR ETHIOPIAN RURAL AREA
. [Internet] [Thesis]. Addis Ababa University; 2014. [cited 2021 Mar 01].
Available from: http://etd.aau.edu.et/dspace/handle/123456789/5230.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Yohannes T. APPLICATION OF MICRO-HYDRO PV/BATTERY OFF- GRID HYBRID ENERGY SYSTEM FOR ETHIOPIAN RURAL AREA
. [Thesis]. Addis Ababa University; 2014. Available from: http://etd.aau.edu.et/dspace/handle/123456789/5230
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Ontario Institute of Technology
20.
Koraz, Yahya.
Risk-modeling tools for designing resilient micro energy grids.
Degree: 2019, University of Ontario Institute of Technology
URL: http://hdl.handle.net/10155/1022
► Micro energy grid (MEG) is widely used to meet the combined electricity, heating, cooling and natural gas demands for numerous customers??? types. Design of MEGs…
(more)
▼ Micro energy
grid (MEG) is widely used to meet the combined electricity, heating, cooling and natural gas demands for numerous customers??? types. Design of MEGs were extensively introduced in numerous articles, however safety analysis methods for MEG design are not existing so far. This study develops a hazard and operability (HAZOP) matrix for MEGs by proposing a resilience matrix. In addition, it proposes two advanced risk-modeling approaches, namely fault tree and layer of resilience analysis (LORA), for risk and resilience analysis of MEG. Selected independent resilience layers (IRLs) were proposed to achieve a resilient MEG by increasing safety integrity level (SIL). IRLs are applied using co-generation and thermal energy storage (TES) technologies to mitigate the hazards of system failure, increase efficiency, and minimize greenhouse gas emissions. The proposed risk assessment approach aims to design a resilient MEG that has the ability to deal with those potentials efficiently. In addition, an energy risk analysis has been applied to each MEG???s physical domains such as electrical, thermal, mechanical and chemical. These concurrent objectives lead to achieving higher resilience, fewer greenhouse gases emissions, and greater sustains economy. A multi-level hierarchical decision making (MLHDM) is one of the IRLs that are proposed in this study. It aims to boost the MEG???s self-healing features on risks uncertainty of the system operation. The structural design of MLHDM consists of three concurrent levels functioning together to achieve a resilient operation. The simulation results of the proposed resilient MEG infrastructure that combine a selected group of IRLs, shows the ability to work with high level of self-healing capability under various hazardous scenarios as well as meeting the on-demand energy requirement. On the other hand, intelligent reasoning algorithms using Bayesian belief network (BBN) are proposed to accurately and instantaneously estimate risks in MEG. This study introduces a hybridsafety assessment approach for MEG diagnosis by using a combination of ANFIS and BBN techniques. Finally, the validation results of the proposed safety analysis tools reveal promising solution for designing resilient MEGs.
Advisors/Committee Members: Dong, Min (Nominal).
Subjects/Keywords: Micro energy grid; Fault diagnosis and prognosis; Risk-modelling; Risk analysis
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APA ·
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Export
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Manager
APA (6th Edition):
Koraz, Y. (2019). Risk-modeling tools for designing resilient micro energy grids. (Thesis). University of Ontario Institute of Technology. Retrieved from http://hdl.handle.net/10155/1022
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Koraz, Yahya. “Risk-modeling tools for designing resilient micro energy grids.” 2019. Thesis, University of Ontario Institute of Technology. Accessed March 01, 2021.
http://hdl.handle.net/10155/1022.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Koraz, Yahya. “Risk-modeling tools for designing resilient micro energy grids.” 2019. Web. 01 Mar 2021.
Vancouver:
Koraz Y. Risk-modeling tools for designing resilient micro energy grids. [Internet] [Thesis]. University of Ontario Institute of Technology; 2019. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/10155/1022.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Koraz Y. Risk-modeling tools for designing resilient micro energy grids. [Thesis]. University of Ontario Institute of Technology; 2019. Available from: http://hdl.handle.net/10155/1022
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
KTH
21.
Ratneswaran, Kanagaratnam.
Hybrid Power System for Eluvaithivu Island Sri Lanka.
Degree: Heat and Power Technology, 2011, KTH
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-146337
► Government of Sri Lanka has policy target to achieve 100% electrification by end of year 2012. Grid-based electrification is possible up to maximum 95%…
(more)
▼ Government of Sri Lanka has policy target to achieve 100% electrification by end of year 2012. Grid-based electrification is possible up to maximum 95% of the population in Sri Lanka. Balance 5% of the electrification has to be mainly depending on off-grid technologies such as solar PV, wind, biomass and micro hydro. Use of renewable based off-grid technologies is limited by the seasonal variation of the resource. This barrier could be overcome by coupling renewable based power generation technologies with a diesel generation thereby forming a hybrid power system. Given the comparatively higher investment cost, a hybrid power plant needs to be carefully designed and optimized to generate electricity at competitive prices. There are some Isolated Islands located in the Jaffna Peninsula (Northern part of Sri Lanka) called Eluvaithivu, Analaithivu, Nainathivu and Delft Islands. These islands are far away from mainland. At present diesel generators are supplying electricity to these islands for limited hours. Electrification rate of these islands are very low due to the Grid limitations. Also cost of electricity generation is very high due to the high diesel price. The main objective of the present study is “Selection of optimized mix of renewable based power generation technologies to form a mini-grid and to supply reliable, cost effective electricity supply to the people living in Eluvaithivu Island’ and thereby support the 100% electrification target by Govt. of Sri Lanka in 2012. Data collection, survey has been conducted in the Eluvaithivu Island to find out the status of present system, priority needs, resource data and load data to propose suitable power system for this Island. An extensive analyse was conducted using HOMER software model and the result is presented in the report. Optimum design emerges as a wind-diesel hybrid power system having wind turbines generator, diesel generators, battery bank, converter and a hybrid controller. The result revealed that the economic viability of the project, in the form of a community owned wind-diesel hybrid power system operated on cost-recovery basis is not feasible. But it is an attractive option for CEB to reduce its long term losses on diesel fuel. In other words, if CEB implement this project, it would be an ideal win-win situation where both the CEB and the island community are benefited.
Subjects/Keywords: Hybrid power system; Renewable Energy; Micro Grid; Isolated power system
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Manager
APA (6th Edition):
Ratneswaran, K. (2011). Hybrid Power System for Eluvaithivu Island Sri Lanka. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-146337
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Ratneswaran, Kanagaratnam. “Hybrid Power System for Eluvaithivu Island Sri Lanka.” 2011. Thesis, KTH. Accessed March 01, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-146337.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ratneswaran, Kanagaratnam. “Hybrid Power System for Eluvaithivu Island Sri Lanka.” 2011. Web. 01 Mar 2021.
Vancouver:
Ratneswaran K. Hybrid Power System for Eluvaithivu Island Sri Lanka. [Internet] [Thesis]. KTH; 2011. [cited 2021 Mar 01].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-146337.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ratneswaran K. Hybrid Power System for Eluvaithivu Island Sri Lanka. [Thesis]. KTH; 2011. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-146337
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Delft University of Technology
22.
van den Biggelaar, Dirk (author).
Towards Decentralized Grids: EnergyBazaar: decentralized free-market energy-trade within an isolated community micro-grid.
Degree: 2018, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:9b1f7b2f-fec8-4993-bcf7-37ab301c0d02
► We witness the rise of prosumers: consumers that produce a surplus of energy that can be sup- plied back into the grid. However, for…
(more)
▼ We witness the rise of prosumers: consumers that produce a surplus of energy that can be sup- plied back into the
grid. However, for energy-trade between prosumers and consumers, a cen- tralized and undesirable middle-man is still necessary. We developed a method to decentralize essential aspects of energy distribution between households. Macro-grids are divided into vari- ous neighborhood sized community-grids; a
micro-
grid. A
micro-
grid as a community yields a degree of self-sustainability. Nevertheless,
micro-grids currently still possess centralized elements. The presence of central controllers, trading-agents or banks, maintains this undesirable situation. Decentralization of a power-
grid increases end-user autonomy, independency and fairness in the system. We propose to establish a truly transactive
micro-
grid: decentralized in its energy distribution, control and money-flow by deploying EnergyBazaar, a distributed trading algorithm. Concepts of game theory are used in the design to enable EnergyBazaar to solve the economic dispatch problem: agents want to individually optimize their social welfare, while the collective task is to stabilize the
grid.
Micro-grids make use of a decoupled hierarchical structure: primary control is responsible for fast dynamics of voltage and frequency, secondary control coordinates the economics within the
micro-
grid. In its core, EnergyBazaar coordinates inverter-based droop parameters within the Energy Storage System (ESS) of each agent, managing their charging/discharging behaviour. A trade-off is identified between economical gain and the necessity of surviving energy scarcity. For this, energy patterns are predicted and acted upon. In contrast to a coordinator dictating a centralized solution, EnergyBazaar creates a free market, where agents individually converge to a global Nash equilibrium. A comparison is made to show performance of both. By rejecting centralized institutions in the
micro-
grid, trust challenges are introduced: achieving decentralized money-flows, the necessity of shared information during distributed optimization and the manipulation of the free-market by malicious agents. We introduce an approach of mitigating these issues in a decentralized paradigm by embedding EnergyBazaar in a smart-contract deployed on a blockchain platform.
Advisors/Committee Members: Erkin, Zekeriya (mentor), Mazo Espinosa, Manuel (mentor), Hijgenaar, Sjors (mentor), Delft University of Technology (degree granting institution).
Subjects/Keywords: Decentralised Micro-Grid; Game-Theory; Blockchain; Distributed Optimization
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APA (6th Edition):
van den Biggelaar, D. (. (2018). Towards Decentralized Grids: EnergyBazaar: decentralized free-market energy-trade within an isolated community micro-grid. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:9b1f7b2f-fec8-4993-bcf7-37ab301c0d02
Chicago Manual of Style (16th Edition):
van den Biggelaar, Dirk (author). “Towards Decentralized Grids: EnergyBazaar: decentralized free-market energy-trade within an isolated community micro-grid.” 2018. Masters Thesis, Delft University of Technology. Accessed March 01, 2021.
http://resolver.tudelft.nl/uuid:9b1f7b2f-fec8-4993-bcf7-37ab301c0d02.
MLA Handbook (7th Edition):
van den Biggelaar, Dirk (author). “Towards Decentralized Grids: EnergyBazaar: decentralized free-market energy-trade within an isolated community micro-grid.” 2018. Web. 01 Mar 2021.
Vancouver:
van den Biggelaar D(. Towards Decentralized Grids: EnergyBazaar: decentralized free-market energy-trade within an isolated community micro-grid. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Mar 01].
Available from: http://resolver.tudelft.nl/uuid:9b1f7b2f-fec8-4993-bcf7-37ab301c0d02.
Council of Science Editors:
van den Biggelaar D(. Towards Decentralized Grids: EnergyBazaar: decentralized free-market energy-trade within an isolated community micro-grid. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:9b1f7b2f-fec8-4993-bcf7-37ab301c0d02
University of Ontario Institute of Technology
23.
Tomal, Mayn.
Optimal planning and operation of CHP within micro energy grids.
Degree: 2016, University of Ontario Institute of Technology
URL: http://hdl.handle.net/10155/651
► In this study, an optimal planning with respect to capacity sizes and types of prime movers for CHP systems within micro energy grids has been…
(more)
▼ In this study, an optimal planning with respect to capacity sizes and types of prime movers for CHP systems within
micro energy grids has been discussed. The objective is to minimize the total net present cost, carbon dioxide (CO2) emission, and mono-nitrogen oxides (NOx) emission for a certain load (electrical or heat) condition. A multi-objective GA (genetic algorithm) was applied to solve the planning problem in order to optimize CHP prime mover types and capacities. Costs, emissions, and efficiencies of CHP prime movers depend on their types, capacity range, and part-load performance. Four candidate CHP prime mover technologies with different characteristics are involved in this study which are; internal combustion engine (ICE), gas turbine (GT), fuel cell (FC), and Stirling engine (SE). The surplus/deficient electricity can possibly be sold to/bought from the main electrical
grid, while the remaining heat demand is met from the conventional natural gas based heating units. The approach was applied to four different load type including a typical
micro energy
grid system as a case study, and the effectiveness of the proposed method was verified. Moreover, a hybrid operational planning algorithm (to maximize primary resource utilization or minimize running cost operation) for CHP prime mover in
micro energy grids (MEGs) has been introduced. The proposed operational planning algorithm has been compared with conventional heat and thermal load following modes of operation. The results found the study are very much dependent on the load (heat and electrical) of the system. However, in almost all the scenarios discussed in the study, proposed system with CHP technologies having optimum sizing results is a significant economic and environmental benefit over the conventional energy infrastructure. It is found that, with optimal capacity of PMs, return on investment of the CHP system could be as high as 13% which leads to a payback period of only 7.8 years. Similarly, with the proposed capacity planning tool, maximum achievable CO2 and NOx emission reduction were 15% and 61% respectively. Moreover, from the case studies it is also seen that, proposed hybrid load following modes were consistently able to maximize PM efficiency and minimize system cost during operation.
Advisors/Committee Members: Gabbar, Hossam A..
Subjects/Keywords: CHP; Genetic algorithm; Micro energy grid; Planning; Operation
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Manager
APA (6th Edition):
Tomal, M. (2016). Optimal planning and operation of CHP within micro energy grids. (Thesis). University of Ontario Institute of Technology. Retrieved from http://hdl.handle.net/10155/651
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Tomal, Mayn. “Optimal planning and operation of CHP within micro energy grids.” 2016. Thesis, University of Ontario Institute of Technology. Accessed March 01, 2021.
http://hdl.handle.net/10155/651.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Tomal, Mayn. “Optimal planning and operation of CHP within micro energy grids.” 2016. Web. 01 Mar 2021.
Vancouver:
Tomal M. Optimal planning and operation of CHP within micro energy grids. [Internet] [Thesis]. University of Ontario Institute of Technology; 2016. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/10155/651.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Tomal M. Optimal planning and operation of CHP within micro energy grids. [Thesis]. University of Ontario Institute of Technology; 2016. Available from: http://hdl.handle.net/10155/651
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Ontario Institute of Technology
24.
Sewilam, Tamer Sayed Abdelhamid Abdelgayed.
Automated wavelet-based fault detection and diagnosis for smart distribution systems and microgrids.
Degree: 2017, University of Ontario Institute of Technology
URL: http://hdl.handle.net/10155/817
► The legacy electric power system is defined as a one-way power flow from a centralized power generation plant to customers (consumers). In the smart distribution…
(more)
▼ The legacy electric power system is defined as a one-way power flow from a centralized
power generation plant to customers (consumers). In the smart distribution systems, the customers
are allowed to produce electricity through the distributed energy resources (e.g. solar
photovoltaics), as well as to consume energy, hence, the smart distribution systems can be defined
as a two-way power flow. The
Micro-
Grid system is defined as a part of the smart distribution
system that may include distributed energy resources, energy storage systems and loads. In
addition, the
Micro-
Grid system can operate in two modes,
grid-connected or non-
grid-connected
(i.e., islanded mode). The protection of the
Micro-
Grid system represents one of the major
operational challenges, in particular when considering the integration of distributed energy
resources, which may result in different fault current levels, especially in islanding mode.
However, the capability of protection system equipment to be more accurate and dependable for
faults diagnostic in the
Micro-
Grid is considered a challenge until now.
In this thesis, an automated wavelet-based fault detection and diagnosis technique based on
a combination of Wavelet Transform, Harmony Search Algorithm, and Machine Learning
approaches is developed for fault diagnosing in the
Micro-
Grid systems. The harmony search
algorithm as an optimization technique is used to identify the optimum wavelet function(s) and the
optimum wavelet decomposition level(s) to extract the most prominent features that are hidden in
the current/voltage waveforms when applying the discrete wavelet transform. This is unlike
previous works in which only one arbitrary wavelet function is used based on a trial and error
process.
In order to automate the fault classification process in
Micro-
Grid system, and to examine
the effectiveness of the automated wavelet-based fault detection and diagnosis method against
iii
other approaches, two machine learning techniques (i.e. Decision Tree as an eager learner, and KNearest
Neighbor as a lazy learner) are used. The performance of the two classifiers is estimated
using the Monte Carlo stratified cross validation method. The Consortium for Electric Reliability
Technology Solutions
Micro-
Grid is used as a test-bed system after modelling in Power Systems
Computer Aided Design/Electromagnetic Transient Direct Current software package. The study
also takes into consideration different operating modes, different fault types, different fault
resistances, and also different fault locations.
The results of implementing the proposed automated wavelet-based fault detection and
diagnosis technique shows a significant improvement in the classification accuracy compared to
other previous approaches reaching an overall accuracy of 95.63% in the
Micro-
Grid test-bed
system. In addition, the proposed technique has been verified experimentally, and the results of
the experimental set-up confirmed the validity/effectiveness of the proposed approach in real-time
…
Advisors/Committee Members: Ibrahim, Walid M., Sidhu, Tarlochan.
Subjects/Keywords: Micro-Grid; Fault diagnosis; Feature extraction; Wavelet transforms; Harmony search algorithm
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Manager
APA (6th Edition):
Sewilam, T. S. A. A. (2017). Automated wavelet-based fault detection and diagnosis for smart distribution systems and microgrids. (Thesis). University of Ontario Institute of Technology. Retrieved from http://hdl.handle.net/10155/817
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Sewilam, Tamer Sayed Abdelhamid Abdelgayed. “Automated wavelet-based fault detection and diagnosis for smart distribution systems and microgrids.” 2017. Thesis, University of Ontario Institute of Technology. Accessed March 01, 2021.
http://hdl.handle.net/10155/817.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sewilam, Tamer Sayed Abdelhamid Abdelgayed. “Automated wavelet-based fault detection and diagnosis for smart distribution systems and microgrids.” 2017. Web. 01 Mar 2021.
Vancouver:
Sewilam TSAA. Automated wavelet-based fault detection and diagnosis for smart distribution systems and microgrids. [Internet] [Thesis]. University of Ontario Institute of Technology; 2017. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/10155/817.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sewilam TSAA. Automated wavelet-based fault detection and diagnosis for smart distribution systems and microgrids. [Thesis]. University of Ontario Institute of Technology; 2017. Available from: http://hdl.handle.net/10155/817
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Arizona
25.
Miller, Darren Alexis.
SELECTIVE POLARIZATION IMAGER FOR CONTRAST ENHANCEMENT IN EXTENDED SCATTERING MEDIA
.
Degree: 2011, University of Arizona
URL: http://hdl.handle.net/10150/202512
► Improved imaging and detection of objects through turbid obscurants is a vital problem of current interest to both military and civilian entities. Image quality is…
(more)
▼ Improved imaging and detection of objects through turbid obscurants is a vital problem of current interest to both military and civilian entities. Image quality is severely degraded when obscurant fields such as fog, smoke, dust, etc., lie between an object and the light-collecting optics. Conventional intensity imaging through turbid media suffers from rapid loss of image contrast due to light scattering from particles (e.g. in fog) or random variations of refractive index (e.g. in medical imaging). Intensity imaging does not differentiate between rays scattered off particles in the obscurant field and those reflected off objects within the field. Scattering degrades image quality in all spectral bands (UV, visible, and IR), although the amount of degradation is wavelength dependent. This dissertation features the development of innovative system designs and techniques that utilize scattered radiation's deterministic polarization state evolution to greatly enhance the image contrast of stand-off objects within obscurant fields such as smoke, fog, or dust using active polarized illumination in the visible. The produced sensors acquire and process image data in real time using computationally non-intensive algorithms that differentiate between radiation that scatters or reflects from obscured objects and the radiation from the scattering media, improving image contrast by factors of ten or greater for dense water vapor obscurants.
Advisors/Committee Members: Dereniak, Eustace L (advisor), Milster, Tom D. (committeemember), Wilson, Daniel W. (committeemember), Dereniak, Eustace L. (committeemember).
Subjects/Keywords: Optical;
Polarization;
Scattering;
Wire-grid;
Optical Sciences;
Imaging;
micro-optics
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CSE |
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Manager
APA (6th Edition):
Miller, D. A. (2011). SELECTIVE POLARIZATION IMAGER FOR CONTRAST ENHANCEMENT IN EXTENDED SCATTERING MEDIA
. (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/202512
Chicago Manual of Style (16th Edition):
Miller, Darren Alexis. “SELECTIVE POLARIZATION IMAGER FOR CONTRAST ENHANCEMENT IN EXTENDED SCATTERING MEDIA
.” 2011. Doctoral Dissertation, University of Arizona. Accessed March 01, 2021.
http://hdl.handle.net/10150/202512.
MLA Handbook (7th Edition):
Miller, Darren Alexis. “SELECTIVE POLARIZATION IMAGER FOR CONTRAST ENHANCEMENT IN EXTENDED SCATTERING MEDIA
.” 2011. Web. 01 Mar 2021.
Vancouver:
Miller DA. SELECTIVE POLARIZATION IMAGER FOR CONTRAST ENHANCEMENT IN EXTENDED SCATTERING MEDIA
. [Internet] [Doctoral dissertation]. University of Arizona; 2011. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/10150/202512.
Council of Science Editors:
Miller DA. SELECTIVE POLARIZATION IMAGER FOR CONTRAST ENHANCEMENT IN EXTENDED SCATTERING MEDIA
. [Doctoral Dissertation]. University of Arizona; 2011. Available from: http://hdl.handle.net/10150/202512
University of New South Wales
26.
Niu, Haichuan.
Micro grid-islanding detection, autonomous operation, synchronization and re-synchronization and battery based energy storage.
Degree: Electrical Engineering & Telecommunications, 2014, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/54113
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:13109/SOURCE02?view=true
► The penetration of micro-grid system containing renewable energy generation is increasing exponentially for alleviating the energy source crisis and environmental pollution. Micro-grids are expected to…
(more)
▼ The penetration of
micro-
grid system containing renewable energy generation is increasing exponentially for alleviating the energy source crisis and environmental pollution.
Micro-grids are expected to achieve two priority aims, which are increase in stability and improvement of renewable energy generation efficiency. In terms of the first aim,
micro-
grid needs to keep operating with or without main-
grid connecting. In
grid disconnected condition, which is also called islanded condition,
micro-
grid system has to ensure its reliability and energy quality, to balance power between generators and loads. For the second aim,
micro-
grid with renewable energy sources is expected to extract maximum available energy at any moment. For realizing this aim, the energy storage system should be embedded in a
micro-
grid to help sharing the surplus energy from generators or missing energy required by loads.Based on above two aims, this thesis presents a comprehensive modeling of a
micro-
grid with the functions of islanding detection, autonomous operation, synchronization and re-synchronization and energy storage. Topology of local distribution generation is modeled by a
grid-tied inverter with LCL filter. Proportional resonant controller is applied to control the inverter. A new islanding detection method which is a combination of two passive detection methods has been adopted in this research. A new method for autonomous operation of islanded
micro-
grid which combines weak droop control and PQ control has been used in this research. An effective and fast 50Hz-signal extracting filter, Windowed-sinc band-pass filter has been used for synchronizing and re-synchronizing between
micro-
grid and main
grid. A combination of bi-directional buck/boost converter and DC/AC converter is applied to connect the energy storage block with
micro-
grid to fulfill the discharging/charging function. A full code-based implementation of this
micro-
grid modeling has been conducted in Matlab Simulink environment. The simulation results have verified that this new
micro-
grid model could operate well. Specifically, firstly, by combining two passive islanding detection methods, one can reach error-free islanding detection and protection. Secondly, autonomous operation of
micro-
grid containing three DGs could be realized by employing weak droop control and PQ control. The weak droop control could share the unbalanced energy between generators and loads automatically. Thirdly, smooth synchronization and re-synchronization could be obtained by extracting fundamental signal of each inverter output by the Windowed-sinc band-pass filter. Lastly, a battery energy system has been adopted to inject or absorb energy into or from
micro-
grid.
Advisors/Committee Members: Zhang, Daming, Electrical Engineering & Telecommunications, Faculty of Engineering, UNSW.
Subjects/Keywords: Synchronization and Re-synchronization; Micro-grid; Autonomous Operation; Energy Storage
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CSE |
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to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Niu, H. (2014). Micro grid-islanding detection, autonomous operation, synchronization and re-synchronization and battery based energy storage. (Masters Thesis). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/54113 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:13109/SOURCE02?view=true
Chicago Manual of Style (16th Edition):
Niu, Haichuan. “Micro grid-islanding detection, autonomous operation, synchronization and re-synchronization and battery based energy storage.” 2014. Masters Thesis, University of New South Wales. Accessed March 01, 2021.
http://handle.unsw.edu.au/1959.4/54113 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:13109/SOURCE02?view=true.
MLA Handbook (7th Edition):
Niu, Haichuan. “Micro grid-islanding detection, autonomous operation, synchronization and re-synchronization and battery based energy storage.” 2014. Web. 01 Mar 2021.
Vancouver:
Niu H. Micro grid-islanding detection, autonomous operation, synchronization and re-synchronization and battery based energy storage. [Internet] [Masters thesis]. University of New South Wales; 2014. [cited 2021 Mar 01].
Available from: http://handle.unsw.edu.au/1959.4/54113 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:13109/SOURCE02?view=true.
Council of Science Editors:
Niu H. Micro grid-islanding detection, autonomous operation, synchronization and re-synchronization and battery based energy storage. [Masters Thesis]. University of New South Wales; 2014. Available from: http://handle.unsw.edu.au/1959.4/54113 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:13109/SOURCE02?view=true
27.
Dufrane, Stacey.
Optimization of daytime fuel consumption for a hybrid diesel and photovoltaic industrial micro-grid.
Degree: MS(M.S.), Mechanical Engineering, 2017, Colorado State University
URL: http://hdl.handle.net/10217/181470
► The work to be presented will examine the optimization of daytime diesel fuel consumption for a hybrid diesel and photovoltaic (PV) industrial micro-grid with no…
(more)
▼ The work to be presented will examine the optimization of daytime diesel fuel consumption for a hybrid diesel and photovoltaic (PV) industrial
micro-
grid with no energy storage. The
micro-
grid utilizes a control system developed to forecast PV transients and manage the diesel generators providing electrical supply to the
micro-
grid. The work focuses on optimization of daytime fuel consumption when PV generation is available. Simulations were utilized to minimize diesel consumption while maintaining secure operations by controlling both PV curtailment and diesel generation. The control system utilizes a cloud forecast system based upon sky imaging, developed by CSIRO (Australia), to predict the presence of cloud cover in concentric "rings" around the sun's position in the sky. The control system utilizes these cloud detections to establish supervisory settings for PV and diesel generation. Work included methods to optimize control response for the number of rings around the sun, studied the use of two different sizes of generators to allow for increased PV utilization, and modification of generator controller settings to reduce fault occurrence. The work indicates that increasing the number of rings used to create the PV forecast has the greatest impact on reducing the number of faults, while having a minimal impact on the total diesel consumption. Additionally, increasing the total number of generators in the system increases PV utilization and decreases fuel consumption.
Advisors/Committee Members: Marchese, Anthony (advisor), Zimmerle, Daniel (advisor), Suryanarayanan, Siddharth (committee member), Bradley, Thomas (committee member).
Subjects/Keywords: micro-grid; microgrid; photovoltaic
…LIST OF FIGURES
FIGURE 1-1: SINGLE-LINE DIAGRAM FOR TANZANIA MICRO-GRID… …3
FIGURE 1-2: POWER OUTPUT FOR THE MICRO-GRID FOR APPROX. 115 DAYS........... 5
FIGURE 1-3… …26
FIGURE 1-15: SET-UP OF THE HYBRID DIESEL-PV MICRO-GRID… …daytime diesel fuel consumption for an industrial
micro-grid located in Tanzania. The micro-grid… …system at the micro-grid site prior to the introduction
of photovoltaics. A partner company…
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Dufrane, S. (2017). Optimization of daytime fuel consumption for a hybrid diesel and photovoltaic industrial micro-grid. (Masters Thesis). Colorado State University. Retrieved from http://hdl.handle.net/10217/181470
Chicago Manual of Style (16th Edition):
Dufrane, Stacey. “Optimization of daytime fuel consumption for a hybrid diesel and photovoltaic industrial micro-grid.” 2017. Masters Thesis, Colorado State University. Accessed March 01, 2021.
http://hdl.handle.net/10217/181470.
MLA Handbook (7th Edition):
Dufrane, Stacey. “Optimization of daytime fuel consumption for a hybrid diesel and photovoltaic industrial micro-grid.” 2017. Web. 01 Mar 2021.
Vancouver:
Dufrane S. Optimization of daytime fuel consumption for a hybrid diesel and photovoltaic industrial micro-grid. [Internet] [Masters thesis]. Colorado State University; 2017. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/10217/181470.
Council of Science Editors:
Dufrane S. Optimization of daytime fuel consumption for a hybrid diesel and photovoltaic industrial micro-grid. [Masters Thesis]. Colorado State University; 2017. Available from: http://hdl.handle.net/10217/181470
University of North Texas
28.
Black, Travis Glenn.
Resilience of Microgrid during Catastrophic Events.
Degree: 2018, University of North Texas
URL: https://digital.library.unt.edu/ark:/67531/metadc1157603/
► Today, there is a growing number of buildings in a neighborhood and business parks that are utilizing renewable energy generation, to reduce their electric bill…
(more)
▼ Today, there is a growing number of buildings in a neighborhood and business parks that are utilizing renewable energy generation, to reduce their electric bill and carbon footprint. The most current way of implementing a renewable energy generation is to use solar panels or a windmill to generate power; then use a charge controller connected to a battery bank to store power. Once stored, the user can then access a clean source of power from these batteries instead of the main power
grid. This type of power structure is utilizing a single module system in respect of one building. As the industry of renewable power generation continues to increase, we start to see a new way of implementing the infrastructure of the power system. Instead of having just individual buildings generating power, storing power, using power, and selling power there is a fifth step that can be added, sharing power. The idea of multiple buildings connected to each other to
share power has been named a microgrid by the power community. With this ability to share power in a microgrid system, a catastrophic event which cause shutdowns of power production can be better managed. This paper then discusses the data from simulations and a built physical model of a resilient microgrid utilizing these principles.
Advisors/Committee Members: Acevedo, Miguel F., Zhong, Xiangnan, Yang, Tao.
Subjects/Keywords: Microgrid; Micro-grid; micro grid; Solar Energy; Simulink; SAM; Resilience; LTSpice; Catastrophic Events; Natural Disasters; Shutdowns; Main Power Grid; Engineering, Electronics and Electrical
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Brno University of Technology
29.
Cabala, Ľuboš.
Spolupráce mikro zdrojů v rámci malé smart grid: Cooperation of micro sources within small smart grid.
Degree: 2018, Brno University of Technology
URL: http://hdl.handle.net/11012/28026
► This thesis concerns with design of micro sources and their implementation in Micro grid system. In the first part the work is aimed at definition…
(more)
▼ This thesis concerns with design of
micro sources and their implementation in
Micro grid system. In the first part the work is aimed at definition of smart -
grid, where describes their advantages, disadvantages and necessary changes, which has to be made in current distribution network for implementation this system. Further on the thesis concerns with detailed description of
Micro grid, configuration of this kind of network, the issues in implementation and possibilities to provide ancillary services. The work also describes marginally virtual power plants, presents definition, components and types of virtual power plants. The final chapter describes the creation of
micro sources in System modeler and subsequent testing of consumption cover to operate in island mode.
Advisors/Committee Members: Radil, Lukáš (advisor), Macháček, Jan (referee).
Subjects/Keywords: mikro zdroje; smart - grid; micro grid; virtuální elektrárna; Wolfram System modeler; matematický model elektrárny; diagram zatížení; micro sources; smart - grid; micro grid; virtual power plant; Wolfram System modeler; mathematical model of power plant; load diagram
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MLA ·
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Manager
APA (6th Edition):
Cabala, . (2018). Spolupráce mikro zdrojů v rámci malé smart grid: Cooperation of micro sources within small smart grid. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/28026
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Cabala, Ľuboš. “Spolupráce mikro zdrojů v rámci malé smart grid: Cooperation of micro sources within small smart grid.” 2018. Thesis, Brno University of Technology. Accessed March 01, 2021.
http://hdl.handle.net/11012/28026.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Cabala, Ľuboš. “Spolupráce mikro zdrojů v rámci malé smart grid: Cooperation of micro sources within small smart grid.” 2018. Web. 01 Mar 2021.
Vancouver:
Cabala . Spolupráce mikro zdrojů v rámci malé smart grid: Cooperation of micro sources within small smart grid. [Internet] [Thesis]. Brno University of Technology; 2018. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/11012/28026.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Cabala . Spolupráce mikro zdrojů v rámci malé smart grid: Cooperation of micro sources within small smart grid. [Thesis]. Brno University of Technology; 2018. Available from: http://hdl.handle.net/11012/28026
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
30.
Varela, José Francisco Manteiga.
Simulação de redes elétricas inteligentes.
Degree: 2018, Instituto Politécnico de Bragança
URL: https://www.rcaap.pt/detail.jsp?id=oai:bibliotecadigital.ipb.pt:10198/17747
► La demanda de energía eléctrica está creciendo rápidamente y el suministro debe ser ininterrumpido incluso si existen crisis o estados de emergencia. La demanda aliada…
(more)
▼ La demanda de energía eléctrica está creciendo rápidamente y el suministro debe ser
ininterrumpido incluso si existen crisis o estados de emergencia. La demanda aliada a la
inconsistencia creada por la introducción creciente de fuentes de energía renovable, genera
inestabilidad, tanto en la red de transmisión como en la red de distribución. Con el fin
de acomodar todos estos cambios, la red ha sufrido varias modificaciones, tanto a nivel
de estructura como a nivel de control, convirtiéndose en una red inteligente denominada
Smartgrid. Este nuevo concepto, tiene como principal objetivo el desarrollo de una red
eléctrica con capacidad para gestionar de una forma más eficiente sus recursos e infraestructuras,
e integrar a los consumidores como productores en el sistema eléctrico de
energía, (incluyendo también los vehículos eléctricos y productores de energía eléctrica
usando energías renovables). Entre los componentes de una Smartgrid, cabe destacar a
la Microgrid como el elemento constructivo básico, un elemento constructivo que en las
últimas décadas se ha venido desarrollando gracias a la introducción de una gran cantidad
de fuentes de generación eléctrica de origen renovable, conectadas a nivel de baja y media
tensión en las redes de distribución. El objetivo de este trabajo es estudiar, modelar y
simular una Microgrid, usando la plataforma Matlab Simulink para comprender mejor su
comportamiento. El estudio parte de una primera configuración (CASO 1), en el que la
Microgrid se compone de cuatro tipos de viviendas, que se diferencian por incluir más
o menos elementos de generación eléctrica renovable (eólica y fotovoltaica), y bloques
de almacenamiento de energía (baterías), además de una instalación común a todas las
viviendas. Para finalizar, se considera un segundo caso (CASO 2) donde se aumenta el
número de los elementos que componen la Microgrid y para finalizar, cumpliendo con una de las principales características que debe de tener una Microgrid, se estima el hecho de
eliminar uno de sus componentes y que esta, siga funcionando.
A procura de eletricidade está a crescer rapidamente e o seu fornecimento deve ser
ininterrupto, mesmo que haja crises ou estados de emergência. A procura, aliada à inconsistência
criado pela crescente introdução de fontes de energia renováveis, gera instabilidade,
tanto na rede de transmissão como na distribuição. Para acomodar estas mudanças, a
rede tem sofrido várias alterações ao nível da estrutura e do nível de controle, tornando-se
uma rede inteligente, dita Smartgrid. Este novo conceito tem como objetivo principal o
desenvolvimento de uma rede elétrica capaz de gerir de forma mais eficiente os seus recursos
e infra-estrutura e integrar os consumidores como productores no sistema de energia
elétrica (incluindo também veículos elétricos e produtores de energia elétrica de fontes
renováveis). Entre os componentes de uma Smartgrid inclui-se a Microgrid como o elemento
de construção básica, um elemento de construção que nas últimas décadas tem sido
desenvolvido pela introdução de…
Advisors/Committee Members: Leitão, Paulo, Jove, Esteban.
Subjects/Keywords: Smart grid; Micro grid; Matlab; Simulink; Energías renovables; Generación distribuida; Domínio/Área Científica::Engenharia e Tecnologia::Outras Engenharias e Tecnologias
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APA (6th Edition):
Varela, J. F. M. (2018). Simulação de redes elétricas inteligentes. (Thesis). Instituto Politécnico de Bragança. Retrieved from https://www.rcaap.pt/detail.jsp?id=oai:bibliotecadigital.ipb.pt:10198/17747
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Varela, José Francisco Manteiga. “Simulação de redes elétricas inteligentes.” 2018. Thesis, Instituto Politécnico de Bragança. Accessed March 01, 2021.
https://www.rcaap.pt/detail.jsp?id=oai:bibliotecadigital.ipb.pt:10198/17747.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Varela, José Francisco Manteiga. “Simulação de redes elétricas inteligentes.” 2018. Web. 01 Mar 2021.
Vancouver:
Varela JFM. Simulação de redes elétricas inteligentes. [Internet] [Thesis]. Instituto Politécnico de Bragança; 2018. [cited 2021 Mar 01].
Available from: https://www.rcaap.pt/detail.jsp?id=oai:bibliotecadigital.ipb.pt:10198/17747.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Varela JFM. Simulação de redes elétricas inteligentes. [Thesis]. Instituto Politécnico de Bragança; 2018. Available from: https://www.rcaap.pt/detail.jsp?id=oai:bibliotecadigital.ipb.pt:10198/17747
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
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