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Oregon State University
1.
Yen, Zuan Z.
Analysis and optimal sizing of an energy storage system for wind farm applications.
Degree: MS, Electrical and Computer Engineering, 2009, Oregon State University
URL: http://hdl.handle.net/1957/11924 
► Modern wind energy is the technology of choice with a short payback period for increasing renewable energy portfolios. Bonneville Power Administration (BPA), a United States…
(more)
▼ Modern
wind energy is the technology of choice with a short payback period for increasing renewable energy portfolios. Bonneville Power Administration (BPA), a United States power authority in the Pacific Northwest expects to increase their
wind energy capacity from 2,000 megawatts to 6,000 megawatts within the next five years. Currently BPA uses their vast hydroelectric resources to counteract the variability of
wind energy, but the control of hydroelectric power is somewhat limited by water and fish conditions on the Columbia River. As the integration of
wind energy continues to increase, the variability of
wind energy on the power system must be addressed. Large scale energy storage
systems such as pumped hydro, compressed air, and flow cell batteries are viable technologies to support high
wind energy integration. This thesis presents a method for obtaining optimal energy capacity and power rating of an energy storage system for
wind farm support.
Advisors/Committee Members: Brekken, Ted K (advisor), von Jouanne, Annette (committee member).
Subjects/Keywords: Wind; Wind energy conversion systems
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APA (6th Edition):
Yen, Z. Z. (2009). Analysis and optimal sizing of an energy storage system for wind farm applications. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/11924
Chicago Manual of Style (16th Edition):
Yen, Zuan Z. “Analysis and optimal sizing of an energy storage system for wind farm applications.” 2009. Masters Thesis, Oregon State University. Accessed March 05, 2021.
http://hdl.handle.net/1957/11924.
MLA Handbook (7th Edition):
Yen, Zuan Z. “Analysis and optimal sizing of an energy storage system for wind farm applications.” 2009. Web. 05 Mar 2021.
Vancouver:
Yen ZZ. Analysis and optimal sizing of an energy storage system for wind farm applications. [Internet] [Masters thesis]. Oregon State University; 2009. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1957/11924.
Council of Science Editors:
Yen ZZ. Analysis and optimal sizing of an energy storage system for wind farm applications. [Masters Thesis]. Oregon State University; 2009. Available from: http://hdl.handle.net/1957/11924
Georgia Tech
2.
Dowling, Matthew R.
Energy harvesting for parafoil and payload aircraft systems.
Degree: MS, Mechanical Engineering, 2017, Georgia Tech
URL: http://hdl.handle.net/1853/59280
► Guided airdrop systems offer an efficient and reliable means of delivering payloads to remote or hard-to-access locations. Utilizing a set of sensors and actuators, the…
(more)
▼ Guided airdrop
systems offer an efficient and reliable means of delivering payloads to remote or hard-to-access locations. Utilizing a set of sensors and actuators, the Airborne Guidance Unit (AGU) intelligently controls the aircraft to a desired impact point (IP). These onboard electronics are powered using high-power-density batteries such as Lithium Polymer or Nickel Metal Hydride batteries. A logistics issue for guided airdrop
systems is maintaining these batteries inside the AGU so that when the system is deployed, the batteries are adequately charged and are able to provide the requisite power to the system. It is typical for a guided airdrop system to be packed and readied for use well before deployment leading to non-negligible battery self-discharge. This necessitates a process to monitor battery life and recharge the
systems after a certain time interval.
This paper explores using a small-scale
wind energy harvesting system to provide the necessary power for the onboard electronics and actuation for a guided airdrop system. Sizing studies are reported to estimate the required scale of both the turbine rotor and generator. Using this information, a full-scale AGU with an integrated twin horizontal axis
wind turbine system was designed, fabricated, and tested in a
wind tunnel to determine the system’s viability. Results indicate that a 0.33 m diameter turbine system can generate over 3.7 W of continuous power at a
wind speed of 8 m/s. This is sufficient to power low-power consumption guided airdrop
systems, such as a bleed air actuated system.
Advisors/Committee Members: Costello, Mark F. (advisor), Rogers, Jonathan (committee member), Sankar, Lakshmi (committee member).
Subjects/Keywords: Wind turbine; Wind energy; Guided airdrop systems
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APA (6th Edition):
Dowling, M. R. (2017). Energy harvesting for parafoil and payload aircraft systems. (Masters Thesis). Georgia Tech. Retrieved from http://hdl.handle.net/1853/59280
Chicago Manual of Style (16th Edition):
Dowling, Matthew R. “Energy harvesting for parafoil and payload aircraft systems.” 2017. Masters Thesis, Georgia Tech. Accessed March 05, 2021.
http://hdl.handle.net/1853/59280.
MLA Handbook (7th Edition):
Dowling, Matthew R. “Energy harvesting for parafoil and payload aircraft systems.” 2017. Web. 05 Mar 2021.
Vancouver:
Dowling MR. Energy harvesting for parafoil and payload aircraft systems. [Internet] [Masters thesis]. Georgia Tech; 2017. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1853/59280.
Council of Science Editors:
Dowling MR. Energy harvesting for parafoil and payload aircraft systems. [Masters Thesis]. Georgia Tech; 2017. Available from: http://hdl.handle.net/1853/59280
Penn State University
3.
Cheruvu, Ramya.
Optimization of Power Generation in Airborne Wind Energy Systems.
Degree: 2015, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/25105
► Optimization of power generation is important for Airborne Wind Energy Systems to increase their cost effectiveness and hence industry viability. In this thesis, an approach…
(more)
▼ Optimization of power generation is important for Airborne
Wind Energy
Systems to increase their cost effectiveness and hence industry viability. In this thesis, an approach to optimal control of airborne
wind turbine along with shape optimization of
wind turbine is proposed. A simplified model of an airborne
wind turbine, constrained for motion along the vertical direction is considered. The Panel method is used for analysis of flow field and pressure distribution on the airborne
wind turbine. The results of this analysis are used to compute real-time lift forces acting on the turbine, which in turn give the power generated at each instant in time. An optimal strategy, using Dynamic Programming algorithm, has been developed to maximize the integral of instantaneous power generated, by adjustment of altitude and orientation of turbine.
Advisors/Committee Members: Hosam Kadry Fathy, Thesis Advisor/Co-Advisor.
Subjects/Keywords: airborne wind energy systems; optimization
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APA (6th Edition):
Cheruvu, R. (2015). Optimization of Power Generation in Airborne Wind Energy Systems. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/25105
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):
Cheruvu, Ramya. “Optimization of Power Generation in Airborne Wind Energy Systems.” 2015. Thesis, Penn State University. Accessed March 05, 2021.
https://submit-etda.libraries.psu.edu/catalog/25105.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Cheruvu, Ramya. “Optimization of Power Generation in Airborne Wind Energy Systems.” 2015. Web. 05 Mar 2021.
Vancouver:
Cheruvu R. Optimization of Power Generation in Airborne Wind Energy Systems. [Internet] [Thesis]. Penn State University; 2015. [cited 2021 Mar 05].
Available from: https://submit-etda.libraries.psu.edu/catalog/25105.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Cheruvu R. Optimization of Power Generation in Airborne Wind Energy Systems. [Thesis]. Penn State University; 2015. Available from: https://submit-etda.libraries.psu.edu/catalog/25105
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Delft University of Technology
4.
Ratzlaff, T. (author).
Effects Future Renewable Installations Will Have on System Synchronous and Synthetic Inertia.
Degree: 2012, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:1c94be1d-3619-40a1-86fa-4a93941cce50
► As wind and solar displace conventional generators, concerns are growing on the effect these asynchronous generators may have on such frequency stabilization services as primary…
(more)
▼ As wind and solar displace conventional generators, concerns are growing on the effect these asynchronous generators may have on such frequency stabilization services as primary and inertial response. An investigation into the system inertia of a future European energy scenario that integrates a high percentage of renewables was done using the output of a 2030 economic dispatch model to evaluate potential problems. The dispatch model provides a realistic view of possible scheduled generator mixes for three synchronous regions in Europe, as simulated for the year 2030, and allows an analysis of the available system inertia in this future scenario. This analysis yielded a positive view into the state of the synchronous system, and suggests that wind turbine installations alone is not a good predictor of a system synchronous inertia. Also central to the analysis was an investigation of the possible ways wind turbines can contribute a synthetic inertial response in a contingency event. The literature based theoretical inertial capabilities present in wind turbines are used to estimate the resource of synthetic inertia available in future systems. This capability was aggregated after using mesoscale meteorological data for its computation. Across each of the European synchronous regions for the 2030 energy scenario, the coincidence of the synthetic inertial capability was compared to the synchronous inertial capability and the stability of those systems was investigated.
Intelligent Electrical Power Grids
Electrical Sustainable Energy
Electrical Engineering, Mathematics and Computer Science
Advisors/Committee Members: Rawn, B.G. (mentor), Gibescu, M. (mentor).
Subjects/Keywords: wind energy; power systems
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APA ·
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APA (6th Edition):
Ratzlaff, T. (. (2012). Effects Future Renewable Installations Will Have on System Synchronous and Synthetic Inertia. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:1c94be1d-3619-40a1-86fa-4a93941cce50
Chicago Manual of Style (16th Edition):
Ratzlaff, T (author). “Effects Future Renewable Installations Will Have on System Synchronous and Synthetic Inertia.” 2012. Masters Thesis, Delft University of Technology. Accessed March 05, 2021.
http://resolver.tudelft.nl/uuid:1c94be1d-3619-40a1-86fa-4a93941cce50.
MLA Handbook (7th Edition):
Ratzlaff, T (author). “Effects Future Renewable Installations Will Have on System Synchronous and Synthetic Inertia.” 2012. Web. 05 Mar 2021.
Vancouver:
Ratzlaff T(. Effects Future Renewable Installations Will Have on System Synchronous and Synthetic Inertia. [Internet] [Masters thesis]. Delft University of Technology; 2012. [cited 2021 Mar 05].
Available from: http://resolver.tudelft.nl/uuid:1c94be1d-3619-40a1-86fa-4a93941cce50.
Council of Science Editors:
Ratzlaff T(. Effects Future Renewable Installations Will Have on System Synchronous and Synthetic Inertia. [Masters Thesis]. Delft University of Technology; 2012. Available from: http://resolver.tudelft.nl/uuid:1c94be1d-3619-40a1-86fa-4a93941cce50
Delft University of Technology
5.
Krishnakanth, R. (author).
Concept design of an installation vessel to install fully assembled next generation offshore wind energy turbines.
Degree: 2014, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:2024b8f8-56a3-4bd5-a62f-8e1227d7eff4
► The shifting of the European energy market towards the wind energy means there will be more wind farms developed in deeper water and farther away…
(more)
▼ The shifting of the European energy market towards the
wind energy means there will be more
wind farms developed in deeper water and farther away from the shore. The existing infrastructure being used for installation is seldom purpose-built for this task, resulting in delays and consequently loss of money for the operators and contractors. Furthermore, the existing process is labor intensive, time consuming and not very safe, the vessels are limited by design to work in moderate sea conditions that for instance exist in the North Sea during the summer season. Seaway Heavy Lifting has been actively involved in solutions for the single lift installation of
wind turbine generators (WTG’s). This thesis is to investigate whether there can be a new concept based on improved hull shapes to install WTG’s in a single lift operation more efficiently. The study involves the development of a concept which can provide safe and speedy transportation and installation of fully assembled next generation WTG’s. The selection of the hull shape is based on an extensive but subjective multi criteria analysis using the mission profile and functional requirements of the vessel and available research & operational data. Most important criteria used are: sufficient capacity to carry 8 completely assembled WTG’s of 7MW in vertical position on deck, sufficient speed potential for good North Sea logistics, good motion characteristics for high installation work-ability, sufficient stability to perform the lifting task. From the multi criteria analysis the SWATH (small water plane area twin hull) appears to be the most promising hull shape and is therefore selected for further analysis. Because Seaway Heavy Lifting has more than two decades experience with mono hull heavy lift vessels, a dual draft mono hull vessel dedicated for WTG installation is also analysed for reference. The dimensions of both vessels are determined based on a parametric study in order to comply with the various design requirements. The required deck area and layout together with the strict stability requirements like drop load criteria and intact stability turned out to be important for overall dimensions of both the SWATH and dual draft mono hull. Furthermore a sensitivity analysis is done on these dimensions to check which ones affect the operability of the SWATH. The stability calculations are validated with the help of recognized stability software. Different speed scenarios are evaluated for a given location to check the dependence on vessel speed, resistance and power requirements which could limit the operability. Based on the derived dimensions both vessels are subjected to multi-body frequency domain motion analysis using a recognized hydrodynamics program. Subsequently the workability of both vessels is investigated using very detailed 2D wave spectral data available for an important North Sea
wind farm development area. The results of this thesis are the first steps towards establishing the SWATH as a viable option for operating as a WTG installation vessel.…
Advisors/Committee Members: Huijsmans, R. (mentor), Weustink, R. (mentor).
Subjects/Keywords: floating systems; wind turbine
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APA (6th Edition):
Krishnakanth, R. (. (2014). Concept design of an installation vessel to install fully assembled next generation offshore wind energy turbines. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:2024b8f8-56a3-4bd5-a62f-8e1227d7eff4
Chicago Manual of Style (16th Edition):
Krishnakanth, R (author). “Concept design of an installation vessel to install fully assembled next generation offshore wind energy turbines.” 2014. Masters Thesis, Delft University of Technology. Accessed March 05, 2021.
http://resolver.tudelft.nl/uuid:2024b8f8-56a3-4bd5-a62f-8e1227d7eff4.
MLA Handbook (7th Edition):
Krishnakanth, R (author). “Concept design of an installation vessel to install fully assembled next generation offshore wind energy turbines.” 2014. Web. 05 Mar 2021.
Vancouver:
Krishnakanth R(. Concept design of an installation vessel to install fully assembled next generation offshore wind energy turbines. [Internet] [Masters thesis]. Delft University of Technology; 2014. [cited 2021 Mar 05].
Available from: http://resolver.tudelft.nl/uuid:2024b8f8-56a3-4bd5-a62f-8e1227d7eff4.
Council of Science Editors:
Krishnakanth R(. Concept design of an installation vessel to install fully assembled next generation offshore wind energy turbines. [Masters Thesis]. Delft University of Technology; 2014. Available from: http://resolver.tudelft.nl/uuid:2024b8f8-56a3-4bd5-a62f-8e1227d7eff4
Ryerson University
6.
Jafari, Murad.
Power factor control in a wind energy conversion system via synchronous generator excitation.
Degree: 2014, Ryerson University
URL: https://digital.library.ryerson.ca/islandora/object/RULA%3A3049
► For high power wind turbines current sources converter (CSC) topologies offer favourable features such as a simple structure, grid friendly waveforms, and reliable grid short…
(more)
▼ For high power
wind turbines current sources converter (CSC) topologies offer favourable features such as a simple structure, grid friendly waveforms, and reliable grid short circuit protection.
Several topologies have been proposed to achieve maximum power point tracking (MPPT) in a
wind energy conversion system (WECS) and control the output power factor within a wide range of
wind speeds. Some of these topologies are reviewed and a novel approach and control strategy is proposed.
The proposed system consists of an electrically excited synchronous generator (EESG), a diode rectifier on the generator-side, and a pulse wave modulated (PWM) current source inverter (CSI) on the grid-side. In the proposed control scheme, the diode rectifier does not offer any control freedoms, therefore controlling the output power and the power factor falls on the EESG and the PWM CSI. The generator excitation is controlled according to the
wind speed value to improve operation range whereby the desired grid side power factor can be maintained, while the control freedoms of the CSI are used to regulate the power output of the WECS and to perform maximum power point tracking (MPPT).
Theoretical analysis was conducted to investigate the feasibility and limits of this approach and the factors affecting it, and computer simulations confirmed the validity of this approach, showing an improved
wind speed range where the desired power factor was maintained.
Advisors/Committee Members: Ryerson University (Degree grantor).
Subjects/Keywords: Wind energy conversion systems; Renewable energy sources; Wind turbines
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APA (6th Edition):
Jafari, M. (2014). Power factor control in a wind energy conversion system via synchronous generator excitation. (Thesis). Ryerson University. Retrieved from https://digital.library.ryerson.ca/islandora/object/RULA%3A3049
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):
Jafari, Murad. “Power factor control in a wind energy conversion system via synchronous generator excitation.” 2014. Thesis, Ryerson University. Accessed March 05, 2021.
https://digital.library.ryerson.ca/islandora/object/RULA%3A3049.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Jafari, Murad. “Power factor control in a wind energy conversion system via synchronous generator excitation.” 2014. Web. 05 Mar 2021.
Vancouver:
Jafari M. Power factor control in a wind energy conversion system via synchronous generator excitation. [Internet] [Thesis]. Ryerson University; 2014. [cited 2021 Mar 05].
Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A3049.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Jafari M. Power factor control in a wind energy conversion system via synchronous generator excitation. [Thesis]. Ryerson University; 2014. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A3049
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Stellenbosch University
7.
Groch, Matthew.
Modelling and short-term forecasting of high wind speed events at operational wind farms.
Degree: PhD, Electrical and Electronic Engineering, 2019, Stellenbosch University
URL: http://hdl.handle.net/10019.1/107184
► ENGLISH ABSTRACT: The increasing penetration of wind energy has prompted a reform of the prototypical operational practices of conventional power systems, especially systems dominated by…
(more)
▼ ENGLISH ABSTRACT: The increasing penetration of wind energy has prompted a reform of the prototypical operational
practices of conventional power systems, especially systems dominated by thermal generation sources.
The variable nature of wind energy generation requires that further investments be made into more
flexible plant with faster start-up capabilities to safeguard against potential shortfalls in generation.
These rapid response services are dispatched by the System Operator in reaction to large power ramps
to ensure that energy balance is maintained. Rapid response services, however, typically assumes the
form of storage or gas turbines, which are procured at a high cost.
In the context of wind power ramping phenomena, High Wind Speed Shutdown (HWSS), potentially,
represents the most severe risk to power system stability. It is clear from the available literature, that
HWSS has not been extensively investigated to date. Although the need for forecasting and
quantification of the impacts of HWSS feature strongly in the available literature, no models have thus
far been formulated to describe this phenomenon, and no event-based forecasting models have been
proposed in response to this research question.
This dissertation targets two major aspects of HWSS, namely the modelling, quantification, and
comparison of the relative risk of HWSS events, and the short-term operational forecasting of HWSS
events. It is evident from the literature that the development of a dedicated HWSS forecasting model
will assist in the management and mitigation of the short-term risk associated with HWSS events. The
development of site-specific models with which to quantify and compare temporal risk will,
furthermore, aid in the siting of wind farms in regions with a low susceptibility for HWSS events.
Two novel event-based forecasting techniques are proposed for the short-term forecasting of HWSS
events, namely an Artificial Neural Network (ANN) model approach, and a hybrid model using an
original statistical downscaling methodology. Both of the proposed model topologies utilise an
ensemble wind speed forecast derived using the Weather Research and Forecasting (WRF) model, as
well as additional environmental variables such as wind direction and temperature. The results prove
that both models demonstrate good accuracy for the forecasting of localised high wind speed events
which occur at the micro-scale level, which is in line with HWSS events.
A technique is proposed for site characterisation and comparison of HWSS events for wind farm site
planning. The proposed technique utilises a probabilistic spatial wind speed distribution to determine
turbine-level wind speeds. A rule-based methodology is applied to extract HWSS events from microscale
wind speeds. The resulting binary event series is analysed using survival theory to create a timeto-
event model for subsequent analysis and relative probabilistic comparison of risk between sites.
AFRIKAANSE OPSOMMING: Die toenemende indringing penetrasie van…
Advisors/Committee Members: Vermeulen, H. J., Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering..
Subjects/Keywords: Winds – Speed; Wind farms; Wind energy conversion systems; Artificial neural network
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APA ·
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Manager
APA (6th Edition):
Groch, M. (2019). Modelling and short-term forecasting of high wind speed events at operational wind farms. (Doctoral Dissertation). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/107184
Chicago Manual of Style (16th Edition):
Groch, Matthew. “Modelling and short-term forecasting of high wind speed events at operational wind farms.” 2019. Doctoral Dissertation, Stellenbosch University. Accessed March 05, 2021.
http://hdl.handle.net/10019.1/107184.
MLA Handbook (7th Edition):
Groch, Matthew. “Modelling and short-term forecasting of high wind speed events at operational wind farms.” 2019. Web. 05 Mar 2021.
Vancouver:
Groch M. Modelling and short-term forecasting of high wind speed events at operational wind farms. [Internet] [Doctoral dissertation]. Stellenbosch University; 2019. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10019.1/107184.
Council of Science Editors:
Groch M. Modelling and short-term forecasting of high wind speed events at operational wind farms. [Doctoral Dissertation]. Stellenbosch University; 2019. Available from: http://hdl.handle.net/10019.1/107184
Stellenbosch University
8.
Mbukani, Mwana Wa Kalaga.
Modelling and control of doubly-fed induction generator systems in wind turbine applications.
Degree: MEng, Electrical and Electronic Engineering, 2017, Stellenbosch University
URL: http://hdl.handle.net/10019.1/101232
► ENGLISH ABSTRACT: The need to reduce the world's carbon foot print has led to a significant rise in wind energy generation. The doubly-fed induction generator…
(more)
▼ ENGLISH ABSTRACT: The need to reduce the world's carbon foot print has led to a significant rise
in wind energy generation. The doubly-fed induction generator (DFIG) is one
of the most popular wind turbine generators partly due to its low rated backto-
back converter. A constant DC-link voltage in the doubly-fed induction
generator system's back to back converter allows for bidirectional power flow
of the rotor power. Hence, effective control of the DC-link voltage is necessary.
The presence of the switching elements in the back-to-back converter creates
harmonics in the systems. LCL and L filters are mostly used to mitigate the
harmonics.
DFIGs are mainly connected to the grid, however, they can be used in
stand-alone mode in isolated rural areas, where there are low loads with no
grid connection. DFIGs in the stand-alone mode have to be controlled such
that they provide voltage and frequency stability at varying load conditions
and changing wind speeds.
In this thesis, the power control of the grid-connected DFIG systems in
wind turbine applications is presented. Power factor regulation is conducted
since it helps in the reduction of the costs linked to the capacitor bank. Maximum
power point tracking is also investigated. DC-link voltage control is
analysed whereby the grid-side converter is controlled as a voltage-source converter.
A comparative analysis of the LCL filter and L filter for switching frequencies
below 5 kHz is done and described in this thesis. This is important for
systems with low sampling frequencies. Furthermore, in this thesis, the control
of a stand-alone DFIG together with simulation result, is presented. Experimental
results are also given to demonstrate the effectiveness of the developed
rotor-side control algorithm on a DFIG test bed.
AFRIKAANSE OPSOMMING: Die behoefte om die wêreld se koolstof spoor te verminder het gelei tot 'n
groot toename in die windopwekking van energie. Die dubbel-gevoerde induksie
generator is een van die mees gewilde wind-turbine opwekkers, gedeeltelik
weens die lae kapasiteit rug-aan-rug omsetter. Die konstante GS-bus spanning
in die induksie generator sisteem se rug-aan-rug omsetter maak twee-rigting
vloei van die rotordrywing moontlik. Daarom is doeltreffende beheer van die
GS-bus spanning nodig. Die teenwoordigheid van die skakelelemente in die
rug-aan-rug omsetter skep harmoniek in die sisteme. LCL en L filters word
meestal gebruik om die harmoniek te verminder.
Dubbel-gevoerde induksie generators word meestal aan die network gekonnekteer,
maar kan ook in alleen-staan modus gebruik word vir verafgeleë landelike
gebiede met lae las en sonder network konneksies. Hierdie alleenstaande
generators moet so beheer word dat hulle stabiele spanning en frekwersie onder
verskillende lastoestande en windspoede kan verskaf.
In hierdie tesis word die beheer van die drywing in die network-verbinde
Dubbel-gevoerde induksie generator sisteme in die windturbine toepassings
bespreek. Regulering van die arbeidsfaktor word toegepas…
Advisors/Committee Members: Gule, Nkosanathi, Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering..
Subjects/Keywords: UCTD; Wind energy conversion systems; Wind turbines; Induction generators
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Manager
APA (6th Edition):
Mbukani, M. W. K. (2017). Modelling and control of doubly-fed induction generator systems in wind turbine applications. (Thesis). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/101232
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):
Mbukani, Mwana Wa Kalaga. “Modelling and control of doubly-fed induction generator systems in wind turbine applications.” 2017. Thesis, Stellenbosch University. Accessed March 05, 2021.
http://hdl.handle.net/10019.1/101232.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mbukani, Mwana Wa Kalaga. “Modelling and control of doubly-fed induction generator systems in wind turbine applications.” 2017. Web. 05 Mar 2021.
Vancouver:
Mbukani MWK. Modelling and control of doubly-fed induction generator systems in wind turbine applications. [Internet] [Thesis]. Stellenbosch University; 2017. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10019.1/101232.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mbukani MWK. Modelling and control of doubly-fed induction generator systems in wind turbine applications. [Thesis]. Stellenbosch University; 2017. Available from: http://hdl.handle.net/10019.1/101232
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Toronto
9.
Li, Xiaoguang.
Estimating Wind Forecast Errors and Quantifying Its Impact on System Operations Subject to Optimal Dispatch.
Degree: 2011, University of Toronto
URL: http://hdl.handle.net/1807/31312
► Wind power is being added to the supply mix of numerous jurisdictions, and an increasing level of uncertainties will be the new reality for many…
(more)
▼ Wind power is being added to the supply mix of numerous jurisdictions, and an increasing level of uncertainties will be the new reality for many system operators. Accurately estimating these uncertainties and properly analyzing their effects will be very important to the reliable operation of the grid. A method is proposed to use historical wind speed, power, and forecast data to estimate the potential future forecast errors. The method uses the weather conditions and ramp events to improve the accuracy of the estimation. A bilevel programming technique is proposed to quantify the effects of the estimated uncertainties. It improves upon existing methods by modeling the transmission network and the re-dispatch of the generators by operators. The technique is tested with multiple systems to illustrate the feasibility of using this technique to alert system operators to potential problems during operation.
MAST
Advisors/Committee Members: Tate, Zeb, Electrical and Computer Engineering.
Subjects/Keywords: power systems; optimal dispatch; wind integration; wind forecast error; 0791
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APA (6th Edition):
Li, X. (2011). Estimating Wind Forecast Errors and Quantifying Its Impact on System Operations Subject to Optimal Dispatch. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/31312
Chicago Manual of Style (16th Edition):
Li, Xiaoguang. “Estimating Wind Forecast Errors and Quantifying Its Impact on System Operations Subject to Optimal Dispatch.” 2011. Masters Thesis, University of Toronto. Accessed March 05, 2021.
http://hdl.handle.net/1807/31312.
MLA Handbook (7th Edition):
Li, Xiaoguang. “Estimating Wind Forecast Errors and Quantifying Its Impact on System Operations Subject to Optimal Dispatch.” 2011. Web. 05 Mar 2021.
Vancouver:
Li X. Estimating Wind Forecast Errors and Quantifying Its Impact on System Operations Subject to Optimal Dispatch. [Internet] [Masters thesis]. University of Toronto; 2011. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1807/31312.
Council of Science Editors:
Li X. Estimating Wind Forecast Errors and Quantifying Its Impact on System Operations Subject to Optimal Dispatch. [Masters Thesis]. University of Toronto; 2011. Available from: http://hdl.handle.net/1807/31312
Uppsala University
10.
Mummery, Robert.
What are the uncertainties and potential impacts of "Brexit"/the EU referendum result on the UK wind energy sector?.
Degree: Earth Sciences, 2019, Uppsala University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-393318
► This study examines the potential effects of Brexit on the wind power industry within the UK. It became apparent that in order to reach…
(more)
▼ This study examines the potential effects of Brexit on the wind power industry within the UK. It became apparent that in order to reach the objective that the approach of the research needed to be broadened as it was found that Brexit has potential effects in many areas of the UK's electricity industry, including the import and export of electricity and the associated fuels used in the generation of electricity. It was found that in the event of a hard Brexit, one with no deal, that the UK's physical connections by undersea cables with the EU may be disrupted. There is a raft of legislation within the Internal Energy Market (IEM) governing this issue that will need a complete rewrite should the UK be forced to leave the IEM. Consideration was given to the effect of Brexit on the three main traditional methods used to generate electricity in the UK, coal, gas and nuclear power and how wind powered energy could be used to fill any shortfall directly or indirectly caused by Brexit. The UK Government has pledged to eradicate the use of coal in generating electricity by 2025 so the study considered only the short term effect of this. For gas, the UK is a net importer, albeit mainly from outside the EU, so the implications of Brexit on gas fired generation of electricity were discussed and found to be negligible. For nuclear powered electricity generation the implications were found to be more serious. The UK would have to resign its membership of Euratom, the European Atomic Agency Community. The potential implications of this include, limited access to nuclear fuel, and reduced participation into nuclear research carried out by the EU. The scope of Euratom also includes a large variety of areas including the safeguarding of nuclear materials in storage and in transit along with radiation protection. Plans by two Japanese companies to build new nuclear power stations in the UK have been shelved with Brexit adding to the uncertainty of their viability. It was found that the combined implications of the above could result in a shortfall in the medium term provision of electricity within the UK. Finally it was discussed whether or not wind powered energy could fill this void and it was found that the UK Government could overcome the deficiency by encouraging investment in wind power by increasing the value of their Contract for Difference, CfD, auctions.
Subjects/Keywords: Brexit; Wind power; UK; Wind energy; Energy; Policy; Energy Systems; Energisystem
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APA (6th Edition):
Mummery, R. (2019). What are the uncertainties and potential impacts of "Brexit"/the EU referendum result on the UK wind energy sector?. (Thesis). Uppsala University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-393318
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):
Mummery, Robert. “What are the uncertainties and potential impacts of "Brexit"/the EU referendum result on the UK wind energy sector?.” 2019. Thesis, Uppsala University. Accessed March 05, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-393318.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mummery, Robert. “What are the uncertainties and potential impacts of "Brexit"/the EU referendum result on the UK wind energy sector?.” 2019. Web. 05 Mar 2021.
Vancouver:
Mummery R. What are the uncertainties and potential impacts of "Brexit"/the EU referendum result on the UK wind energy sector?. [Internet] [Thesis]. Uppsala University; 2019. [cited 2021 Mar 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-393318.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mummery R. What are the uncertainties and potential impacts of "Brexit"/the EU referendum result on the UK wind energy sector?. [Thesis]. Uppsala University; 2019. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-393318
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Victoria
11.
Khorsand Asgari, Iman.
Instrumentation, Control, and Testing of a Small Wind Turbine Test Rig.
Degree: Department of Mechanical Engineering, 2015, University of Victoria
URL: http://hdl.handle.net/1828/6060
► As a cost-effective test method, a vehicle-based test rig can be utilized in small wind turbine experimental work to facilitate turbine performance tests under a…
(more)
▼ As a cost-effective test method, a vehicle-based test rig can be utilized in small
wind turbine experimental work to facilitate turbine performance tests under a range of controlled
wind speeds, as well as to validate turbulent flow models. The instrumentation of a custom trailer-based mobile
wind turbine test rig has been modified to provide a platform for full rotor speed control. A control system coupled to an electric vehicle controller with regenerative braking technology was developed in five steps, namely: system modeling in Simulink, system identification, control system design and analysis, control system implementation in LabVIEW, and Proportional-Integral-Derivative (PID) controller tuning in real-time. A custom Graphical User Interface (GUI) was also developed. Furthermore, a Computational Fluid Dynamics (CFD) analysis was conducted to assess the potential impact of towing vehicle’s disturbance on the free stream available to the rotor disc. This trailer rig will allow up to a 1kW
wind turbine. It can be towed behind a vehicle to conduct steady state tests or it can be parked in an open area to collect unsteady field data. It has been tested in a towed scenario and the Blade Element Momentum (BEM) predictions were compared with the obtained aggregate performance curve.
Advisors/Committee Members: Crawford, Curran (supervisor).
Subjects/Keywords: Renewable Energy Systems; Wind Energy; Wind Turbine Testing
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APA (6th Edition):
Khorsand Asgari, I. (2015). Instrumentation, Control, and Testing of a Small Wind Turbine Test Rig. (Masters Thesis). University of Victoria. Retrieved from http://hdl.handle.net/1828/6060
Chicago Manual of Style (16th Edition):
Khorsand Asgari, Iman. “Instrumentation, Control, and Testing of a Small Wind Turbine Test Rig.” 2015. Masters Thesis, University of Victoria. Accessed March 05, 2021.
http://hdl.handle.net/1828/6060.
MLA Handbook (7th Edition):
Khorsand Asgari, Iman. “Instrumentation, Control, and Testing of a Small Wind Turbine Test Rig.” 2015. Web. 05 Mar 2021.
Vancouver:
Khorsand Asgari I. Instrumentation, Control, and Testing of a Small Wind Turbine Test Rig. [Internet] [Masters thesis]. University of Victoria; 2015. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1828/6060.
Council of Science Editors:
Khorsand Asgari I. Instrumentation, Control, and Testing of a Small Wind Turbine Test Rig. [Masters Thesis]. University of Victoria; 2015. Available from: http://hdl.handle.net/1828/6060
University of Minnesota
12.
Coburn, Jacob.
Wind in the Upper Midwest: Assessing Wind Resource Variability and Representation in Reanalyses.
Degree: PhD, Geography, 2020, University of Minnesota
URL: http://hdl.handle.net/11299/216894
► Wind has become an important element of climate for consideration due to the its growing presence as a renewable source of energy. Variations in wind…
(more)
▼ Wind has become an important element of climate for consideration due to the its growing presence as a renewable source of energy. Variations in wind create uncertainty which adversely impacts investment and planning decisions and can lead to structural damage to equipment when extreme events occur which are not able to be adequately planned for. Long-term wind variations are related to climate variability over periods ranging from months to years, with the so-called teleconnections possibly driving significant changes in power output. The goal of this study was to assess the potential impacts of modes of variability within the climate system on wind energy output in the Upper Midwest (UMW: 40-52°N, 87-105°W), a North American region rich in wind resources and experiencing rapid turbine deployment. First, to facilitate this goal, the representation of wind resources by reanalysis models was tested, as were methods of extrapolating 10-meter wind speeds to heights more common of wind turbines (hub-height, often around 80-100 meters). Reanalyzed wind fields were found to capture many of the mean, variational and distributional characteristics of wind speeds at 10-meters as measured by weather stations, though declining trends in the observations were not found to be accurately replicated in the reanalysis models. Next, four methods of wind speed extrapolation commonly used in the literature were tested for their capacity to capture the mean and variations in wind speeds from tall towers measuring at heights ranging from 39-100 meters above ground level. Each method was applied to four reanalyses and results compared against tall tower data. All of the method-reanalysis combinations produced wind speeds which were too slow than observed and less variable than those measured at the tall towers, though the variable exponent power rule applied to MERRA was able to achieve relatively close results with small mean biases. 80-meter wind fields were generated from MERRA using the variable exponent power rule for application in the final section of this study. The 80-meter wind fields were utilized to derive wind energy output. This power output data was then used in a multiple linear regression model to assess the influence of several teleconnections important to the UMW, as well as potential effects of solar forcing variations. This model was applied to each grid cell and season, allowing for spatial and temporal variations in the relationships between the modes of variability and power production to manifest. The magnitude and significance of the teleconnections and solar forcing vary throughout the year and across the region. These influences are shown to fit with expectations of flow set by sea level pressure anomaly patterns. Extreme monthly wind energy anomalies are explored, with the strongest extremes affecting most of the region simultaneously and negative power anomalies found to persist for periods of several months to a year. Negative power output episodes are shown to follow from a combination of synoptic and…
Subjects/Keywords: climate; earth systems; physical geography; renewable energy; wind energy; wind power
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Export
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Manager
APA (6th Edition):
Coburn, J. (2020). Wind in the Upper Midwest: Assessing Wind Resource Variability and Representation in Reanalyses. (Doctoral Dissertation). University of Minnesota. Retrieved from http://hdl.handle.net/11299/216894
Chicago Manual of Style (16th Edition):
Coburn, Jacob. “Wind in the Upper Midwest: Assessing Wind Resource Variability and Representation in Reanalyses.” 2020. Doctoral Dissertation, University of Minnesota. Accessed March 05, 2021.
http://hdl.handle.net/11299/216894.
MLA Handbook (7th Edition):
Coburn, Jacob. “Wind in the Upper Midwest: Assessing Wind Resource Variability and Representation in Reanalyses.” 2020. Web. 05 Mar 2021.
Vancouver:
Coburn J. Wind in the Upper Midwest: Assessing Wind Resource Variability and Representation in Reanalyses. [Internet] [Doctoral dissertation]. University of Minnesota; 2020. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/11299/216894.
Council of Science Editors:
Coburn J. Wind in the Upper Midwest: Assessing Wind Resource Variability and Representation in Reanalyses. [Doctoral Dissertation]. University of Minnesota; 2020. Available from: http://hdl.handle.net/11299/216894
Cal Poly
13.
Tavakolinia, Fereshteh.
Wind- Chimney (Integrating the Principles of a Wind-Catcher and a Solar-Chimney to Provide Natural Ventilation).
Degree: MS, Architecture, 2011, Cal Poly
URL: https://digitalcommons.calpoly.edu/theses/678
;
10.15368/theses.2011.232
► WIND-CHIMNEY Integrating the principles of a wind-catcher and a solar chimney to provide natural ventilation Fereshteh Tavakolinia Abstract This paper suggests using a wind-catcher…
(more)
▼ WIND-CHIMNEY
Integrating the principles of a
wind-catcher and a solar chimney to provide natural ventilation
Fereshteh Tavakolinia
Abstract
This paper suggests using a
wind-catcher integrated with a solar-chimney in a single story building so that the resident might benefit from natural ventilation, a passive cooling system, and heating strategies; it would also help to decrease energy use, CO2 emissions, and pollution. This system is able to remove undesirable interior heat pollution from a building and provide thermal comfort for the occupant. The present study introduces the use of a solar-chimney with an underground air channel combined with a
wind-catcher, all as part of one device. Both the
wind-catcher and solar chimney concepts used for improving a room’s natural ventilation are individually and analytically studied. This paper shows that the solar-chimney can be completely used to control and improve the underground cooling system during the day without any electricity. With a proper design, the solar-chimney can provide a thermally comfortable indoor environment for many hours during hot summers. The end product of this thesis research is a natural ventilation system and techniques that improve air quality and thermal comfort levels in a single story building. The proposed
wind-chimney could eventually be designed for use in commercial, retail, and multi-story buildings.
Advisors/Committee Members: James Doerfler, Jacob Feldman.
Subjects/Keywords: Wind-Catcher; Wind-Chimney; Solar Chimney; Natural ventilation systems; Architecture
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APA (6th Edition):
Tavakolinia, F. (2011). Wind- Chimney (Integrating the Principles of a Wind-Catcher and a Solar-Chimney to Provide Natural Ventilation). (Masters Thesis). Cal Poly. Retrieved from https://digitalcommons.calpoly.edu/theses/678 ; 10.15368/theses.2011.232
Chicago Manual of Style (16th Edition):
Tavakolinia, Fereshteh. “Wind- Chimney (Integrating the Principles of a Wind-Catcher and a Solar-Chimney to Provide Natural Ventilation).” 2011. Masters Thesis, Cal Poly. Accessed March 05, 2021.
https://digitalcommons.calpoly.edu/theses/678 ; 10.15368/theses.2011.232.
MLA Handbook (7th Edition):
Tavakolinia, Fereshteh. “Wind- Chimney (Integrating the Principles of a Wind-Catcher and a Solar-Chimney to Provide Natural Ventilation).” 2011. Web. 05 Mar 2021.
Vancouver:
Tavakolinia F. Wind- Chimney (Integrating the Principles of a Wind-Catcher and a Solar-Chimney to Provide Natural Ventilation). [Internet] [Masters thesis]. Cal Poly; 2011. [cited 2021 Mar 05].
Available from: https://digitalcommons.calpoly.edu/theses/678 ; 10.15368/theses.2011.232.
Council of Science Editors:
Tavakolinia F. Wind- Chimney (Integrating the Principles of a Wind-Catcher and a Solar-Chimney to Provide Natural Ventilation). [Masters Thesis]. Cal Poly; 2011. Available from: https://digitalcommons.calpoly.edu/theses/678 ; 10.15368/theses.2011.232
University of Oklahoma
14.
Aula, Fadhil T.
POWER CONTROL AND MANAGEMENT OF THE GRID CONTAINING LARGE-SCALE WIND POWER SYSTEMS.
Degree: PhD, 2013, University of Oklahoma
URL: http://hdl.handle.net/11244/318798
To summarize, the methods and their results presented in this dissertation, enhance the operation of the large-scale wind power systems and reduce their drawbacks on the operation of the power grid.
Advisors/Committee Members: Lee, Samuel C (advisor).Subjects/Keywords: Wind energy conversion systems – Design and construction; Wind power industry
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Manager
APA (6th Edition):
Aula, F. T. (2013). POWER CONTROL AND MANAGEMENT OF THE GRID CONTAINING LARGE-SCALE WIND POWER SYSTEMS. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/318798
Chicago Manual of Style (16th Edition):
Aula, Fadhil T. “POWER CONTROL AND MANAGEMENT OF THE GRID CONTAINING LARGE-SCALE WIND POWER SYSTEMS.” 2013. Doctoral Dissertation, University of Oklahoma. Accessed March 05, 2021.
http://hdl.handle.net/11244/318798.
MLA Handbook (7th Edition):
Aula, Fadhil T. “POWER CONTROL AND MANAGEMENT OF THE GRID CONTAINING LARGE-SCALE WIND POWER SYSTEMS.” 2013. Web. 05 Mar 2021.
Vancouver:
Aula FT. POWER CONTROL AND MANAGEMENT OF THE GRID CONTAINING LARGE-SCALE WIND POWER SYSTEMS. [Internet] [Doctoral dissertation]. University of Oklahoma; 2013. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/11244/318798.
Council of Science Editors:
Aula FT. POWER CONTROL AND MANAGEMENT OF THE GRID CONTAINING LARGE-SCALE WIND POWER SYSTEMS. [Doctoral Dissertation]. University of Oklahoma; 2013. Available from: http://hdl.handle.net/11244/318798
Texas A&M University
15.
Trevino, Alexis.
Modular Micro-Wind Turbine for Providing Power to Train Sensing Systems.
Degree: MS, Mechanical Engineering, 2018, Texas A&M University
URL: http://hdl.handle.net/1969.1/173617
► The proposed work involves developing a wind turbine system that charges batteries to provide required power of sensing and communication systems, while railroad operates at…
(more)
▼ The proposed work involves developing a
wind turbine system that charges batteries to provide required power of sensing and communication
systems, while railroad operates at expected operating conditions. For this project, a 50 mph
wind and 50 watts power requirement is assumed. Taking into account inefficiencies and parasitic losses in the
wind turbine and electrical system, a blade diameter of 7 inches is calculated to be necessary for this application. Since off the shelf
wind turbines are not designed for this specification, it is necessary to design the most efficient blade shape for this application while also taking into account the electrical charging system power requirements.
For a constant
wind speed, a
wind turbine blade has a characteristic torque (or power) vs angular velocity curve, that is dependent on the angle of twist and chord length distribution, hub and overall radius, and airfoil of the blade. Similarly, the electrical system has a characteristic torque vs angular velocity (power vs angular velocity) curve that is dependent on the state of charge of the battery. The design approach used in this project was to create several
wind turbine blade and electrical system characteristic power curves. Next, the intersection between
wind turbine blade and electrical characteristic curve that yields the highest power transfer is used to choose a
wind turbine blade shape.
The objective of this work is to develop a battery charging system along with an optimized
wind turbine blade that provides the highest power transfer to the battery; manufacture the blade with close dimensional agreement; and test on a
wind tunnel to compare theoretical and experimental torque, power, and efficiency curves as well as charging of battery.
Advisors/Committee Members: Palazzolo, Alan (advisor), Kim, Won-jong (committee member), Allen, David (committee member).
Subjects/Keywords: Modular Micro Wind Turbine; Micro-Wind Turbine; optimized wind turbine for powering train sensing systems; Wind Turbine Optimization
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Manager
APA (6th Edition):
Trevino, A. (2018). Modular Micro-Wind Turbine for Providing Power to Train Sensing Systems. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/173617
Chicago Manual of Style (16th Edition):
Trevino, Alexis. “Modular Micro-Wind Turbine for Providing Power to Train Sensing Systems.” 2018. Masters Thesis, Texas A&M University. Accessed March 05, 2021.
http://hdl.handle.net/1969.1/173617.
MLA Handbook (7th Edition):
Trevino, Alexis. “Modular Micro-Wind Turbine for Providing Power to Train Sensing Systems.” 2018. Web. 05 Mar 2021.
Vancouver:
Trevino A. Modular Micro-Wind Turbine for Providing Power to Train Sensing Systems. [Internet] [Masters thesis]. Texas A&M University; 2018. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1969.1/173617.
Council of Science Editors:
Trevino A. Modular Micro-Wind Turbine for Providing Power to Train Sensing Systems. [Masters Thesis]. Texas A&M University; 2018. Available from: http://hdl.handle.net/1969.1/173617
Anna University
16.
Mayurappriyan P S.
Analysis of horizontal axis wind turbine
generators;.
Degree: horizontal axis wind turbine generators, 2014, Anna University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/24201
► In India wind power has emerged as the leading green energy newlinetechnology with an average growth rate of 30 India is the worlds fifth newlinelargest…
(more)
▼ In India wind power has emerged as the leading
green energy newlinetechnology with an average growth rate of 30
India is the worlds fifth newlinelargest producer of wind power
with a total installed capacity of 14723 MW newlineas of July 2011
Wind power has been concentrated in few regions especially
newlinethe southern state of Tamil Nadu which maintains its
position as the state newlinewith the largest wind power
installation with 6160 MW till July 2011 newlineAlmost all the Wind
Turbine Generators WTG has the axis of rotation in
newlinehorizontal direction and hence they are termed as horizontal
axis WTG newlineGenerally the Indian power systems are not
sufficient to cater to the needs of newlineincrease in wind farms
in a few rural areas where the existing transmission newlineand
distribution grids are very weak The power quality of the grid
influences newlinethe performance and safety of the WTG and the
life time of mechanical and newlineelectrical components Hence
rather than the technical advancements of newlineWTG the power
quality issues are also to be studied newline
newline
Reference p.196-201
Advisors/Committee Members: Jovitha jerome.
Subjects/Keywords: electrical engineering; power systems; wind turbine generators
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Manager
APA (6th Edition):
S, M. P. (2014). Analysis of horizontal axis wind turbine
generators;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/24201
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):
S, Mayurappriyan P. “Analysis of horizontal axis wind turbine
generators;.” 2014. Thesis, Anna University. Accessed March 05, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/24201.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
S, Mayurappriyan P. “Analysis of horizontal axis wind turbine
generators;.” 2014. Web. 05 Mar 2021.
Vancouver:
S MP. Analysis of horizontal axis wind turbine
generators;. [Internet] [Thesis]. Anna University; 2014. [cited 2021 Mar 05].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/24201.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
S MP. Analysis of horizontal axis wind turbine
generators;. [Thesis]. Anna University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/24201
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Victoria
17.
Gassner, Andy.
Sizing storage and wind generation capacities in remote power systems.
Degree: Dept. of Mechanical Engineering, 2011, University of Victoria
URL: http://hdl.handle.net/1828/3618
► Global adoption of renewable energy is increasing due to growing concern over climate change, increasing costs associated with conventional generation, and decreasing capital investment costs…
(more)
▼ Global adoption of renewable energy is increasing due to growing concern over climate change, increasing costs associated with conventional generation, and decreasing capital investment costs of renewable energy technologies. Specifically,
wind power represents the most technologically mature renewable alternative and is recognized as a cost effective generation source in both large and small power
systems. However, the variability due to the stochastic nature of the
wind resource introduces technological limitations to the amount of
wind power which can be integrated in a power system. Energy storage is seen as a solution to mitigate the variability in
wind power output.
Wind power and energy storage devices have the potential to contribute a substantial amount of renewable generation to meet the electricity demand in remote power
systems. Remote power
systems are characterized by their self reliance on electrical generation. The basic function of a remote power system is to provide the necessary power to satisfy the community’s electricity demand requirements as economically as possible with an adequate level of continuity and reliability.
Advisors/Committee Members: Rowe, Andrew Michael (supervisor), Wild, Peter Martin (supervisor).
Subjects/Keywords: renewable energy; wind power; remote power systems
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Manager
APA (6th Edition):
Gassner, A. (2011). Sizing storage and wind generation capacities in remote power systems. (Masters Thesis). University of Victoria. Retrieved from http://hdl.handle.net/1828/3618
Chicago Manual of Style (16th Edition):
Gassner, Andy. “Sizing storage and wind generation capacities in remote power systems.” 2011. Masters Thesis, University of Victoria. Accessed March 05, 2021.
http://hdl.handle.net/1828/3618.
MLA Handbook (7th Edition):
Gassner, Andy. “Sizing storage and wind generation capacities in remote power systems.” 2011. Web. 05 Mar 2021.
Vancouver:
Gassner A. Sizing storage and wind generation capacities in remote power systems. [Internet] [Masters thesis]. University of Victoria; 2011. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1828/3618.
Council of Science Editors:
Gassner A. Sizing storage and wind generation capacities in remote power systems. [Masters Thesis]. University of Victoria; 2011. Available from: http://hdl.handle.net/1828/3618
Ryerson University
18.
Syed, Irtaza Mohammad.
Power Quality Improvement by Supercapacitor Energy Storage.
Degree: 2010, Ryerson University
URL: https://digital.library.ryerson.ca/islandora/object/RULA%3A1491
► Harnessing green and renewable sources of energy is a future solution that addresses rising energy demands and growing environmental concerns. Among these, tapping wind energy…
(more)
▼ Harnessing green and renewable sources of energy is a future solution that addresses rising energy demands and growing environmental concerns. Among these, tapping
wind energy using
wind turbines appears to be one of the most promising solutions. A
wind energy conversion system captures kinetic energy of
wind and converts it into electrical energy. By nature, availability of
wind energy is stochastic and intermittent. In contrast, electric power system expects a steady and planned supply of energy. This thesis addresses the gap in characteristics of
wind energy supply and conventional electric energy demand. This thesis considers a doubly fed induction generator (DFIG) connected to a
wind turbine to harness
wind energy. The proposed topology connects a Supercapacitor through a buck-boost chopper to the DC link of rotor circuit. The Supercapacitor works to perform the job of a flywheel. The thesis proposes an appropriate control system that controls the output of the DFIG to constant value (Pref) eliminating short-term fluctuations. This control system works to control the buck-boost chopper and works as a inner control loop. Thereafter, this thesis proposes and optimization algorithm that considers short-term forecasted
wind speeds (energy) for several minutes. It then optimizes to determine a minimum set of output values of the DFIG (Pref). It ensures that output of the DFIG has minimum changes thus minimizing intermittency in the DFIG output. This optimization algorithm forms the outer loop in the overall control strategy.The complete system is implemented in Matlab/Simulink and analysed in this thesis. The results demonstrate that the inner and outer control loops work to minimize output power oscillations and improve power quality.
Advisors/Committee Members: Ryerson University (Degree grantor).
Subjects/Keywords: Wind energy conversion systems – Automatic control; Wind energy conversion systems; Induction generators
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APA (6th Edition):
Syed, I. M. (2010). Power Quality Improvement by Supercapacitor Energy Storage. (Thesis). Ryerson University. Retrieved from https://digital.library.ryerson.ca/islandora/object/RULA%3A1491
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):
Syed, Irtaza Mohammad. “Power Quality Improvement by Supercapacitor Energy Storage.” 2010. Thesis, Ryerson University. Accessed March 05, 2021.
https://digital.library.ryerson.ca/islandora/object/RULA%3A1491.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Syed, Irtaza Mohammad. “Power Quality Improvement by Supercapacitor Energy Storage.” 2010. Web. 05 Mar 2021.
Vancouver:
Syed IM. Power Quality Improvement by Supercapacitor Energy Storage. [Internet] [Thesis]. Ryerson University; 2010. [cited 2021 Mar 05].
Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A1491.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Syed IM. Power Quality Improvement by Supercapacitor Energy Storage. [Thesis]. Ryerson University; 2010. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A1491
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Colorado School of Mines
19.
Rezaei, Vahid.
Active robust control of wind turbines.
Degree: MS(M.S.), Electrical Engineering and Computer Science, 2014, Colorado School of Mines
URL: http://hdl.handle.net/11124/365
► The research work conducted in this thesis focuses on robustness of wind energy conversion system with respect to faults in pitch actuator in order to…
(more)
▼ The research work conducted in this thesis focuses on robustness of
wind energy conversion system with respect to faults in pitch actuator in order to prevent unnecessary emergency shutdown, and keep the turbine operational without significant inefficiency in its overall performance. The objective is to investigate the feasibility of using a fault estimator and a light detection and ranging (LIDAR) system as additional sensors to design a suitable control system for
wind turbines. Robust control technique is used to address these issues. Three controllers are proposed in this work that try to address sources of inaccuracy in
wind turbine operation: An active fault tolerant controller is first designed using a fault estimator. It is shown that a set of locally robust controllers with respect to the fault, together with a suitable smooth mixing approach, manages to overcome the problem of faults in the pitch actuator. To address the
wind-dependent behavior of turbines, a second controller is designed using the LIDAR sensor. In this configuration, LIDAR provides the look ahead
wind information and generates a smooth scheduling signal to provide active robustness with respect to the changes in
wind speed. Lastly, utilizing both the fault estimator and LIDAR, a 2-dimentional
wind-dependent active fault tolerant controller is developed to control the
wind turbine in region 3 of operation. The feasibility of the proposed ideas is verified in simulation. For this purpose, the US National Renewable Energy Laboratory's FAST code is used to model the 3-balded controls advanced research turbine. A discussion on practical considerations and ideas for future work are also presented.
Advisors/Committee Members: Mohagheghi, Salman (advisor), Vincent, Tyrone (committee member), Moore, Kevin L., 1960- (committee member).
Subjects/Keywords: wind turbine; robust control; pitch control; fault tolerant control; Wind turbines; Wind energy conversion systems; Feedback control systems; Optical radar; Actuators
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APA (6th Edition):
Rezaei, V. (2014). Active robust control of wind turbines. (Masters Thesis). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/365
Chicago Manual of Style (16th Edition):
Rezaei, Vahid. “Active robust control of wind turbines.” 2014. Masters Thesis, Colorado School of Mines. Accessed March 05, 2021.
http://hdl.handle.net/11124/365.
MLA Handbook (7th Edition):
Rezaei, Vahid. “Active robust control of wind turbines.” 2014. Web. 05 Mar 2021.
Vancouver:
Rezaei V. Active robust control of wind turbines. [Internet] [Masters thesis]. Colorado School of Mines; 2014. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/11124/365.
Council of Science Editors:
Rezaei V. Active robust control of wind turbines. [Masters Thesis]. Colorado School of Mines; 2014. Available from: http://hdl.handle.net/11124/365
University of Manchester
20.
Martinez-Cesena, Eduardo Alejandro.
Real options theory applied to renewable energy generation projects planning.
Degree: PhD, 2012, University of Manchester
URL: https://www.research.manchester.ac.uk/portal/en/theses/real-options-theory-applied-to-renewable-energy-generation-projects-planning(280f3df5-f1be-4999-bd33-3931ce3cdbbd).html
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.555531
► The existing environmental threats and the ever increasing global dependence on electric power highlight the importance of producing power in a sustainable manner. In accordance,…
(more)
▼ The existing environmental threats and the ever increasing global dependence on electric power highlight the importance of producing power in a sustainable manner. In accordance, it is vital to attract investments in electricity generation projects based on renewable energy sources, also called renewable energy projects (REP). This poses a challenge, as REP tend to be less financially competitive than their fossil fuel based counterparts. Moreover, the power grid has to be upgraded to integrate large amounts of RESs in an efficient and economic manner. An appealing alternative to enhance the financial appealing of REP is to improve the techniques used for their assessment. These tools produce robust and economically sound assessments, but tend to undervalue REP and other projects under uncertainty, as they neglect the flexibility of the projects to be adjusted in response to uncertainty. This can be corrected by extending the tools with the aid of real options (RO) theory. RO theory can be used to extend assessment techniques to value flexibility derived from the projects, their management, and even their environment, which can be used to enhance the financial value of REP in the changing power sector. In addition, the scope of RO theory is increasing to address flexibility in the design of the projects. Therefore, the theory can drive investments in REP and motivate the design of more profitable projects. This research project seeks to analyse the potential of RO theory to increase the financial worth of different types of REP in the current and changing power sector. The novelties of this research are that it expands RO theory by addressing the flexibility within the design of the projects, the potential of RO theory to manage uncertainties that are exclusive to the projects or typical in the power sector, and other relevant areas of research interest. The research produced several RO methodologies to model the planning, operation, and design of hydropower projects, wind power projects, and solar photovoltaic projects in existing power sector environments and environments characterised by high penetration of RESs and consumers with demand response capabilities. The results demonstrate the applicability of RO theory to enhance the financial value of different types of REP under a wide range of circumstances.
Subjects/Keywords: 621.31; Real Options theory; Power systems economics; Hydropower systems; Wind power systems; Solar Photovoltaic systems
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APA (6th Edition):
Martinez-Cesena, E. A. (2012). Real options theory applied to renewable energy generation projects planning. (Doctoral Dissertation). University of Manchester. Retrieved from https://www.research.manchester.ac.uk/portal/en/theses/real-options-theory-applied-to-renewable-energy-generation-projects-planning(280f3df5-f1be-4999-bd33-3931ce3cdbbd).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.555531
Chicago Manual of Style (16th Edition):
Martinez-Cesena, Eduardo Alejandro. “Real options theory applied to renewable energy generation projects planning.” 2012. Doctoral Dissertation, University of Manchester. Accessed March 05, 2021.
https://www.research.manchester.ac.uk/portal/en/theses/real-options-theory-applied-to-renewable-energy-generation-projects-planning(280f3df5-f1be-4999-bd33-3931ce3cdbbd).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.555531.
MLA Handbook (7th Edition):
Martinez-Cesena, Eduardo Alejandro. “Real options theory applied to renewable energy generation projects planning.” 2012. Web. 05 Mar 2021.
Vancouver:
Martinez-Cesena EA. Real options theory applied to renewable energy generation projects planning. [Internet] [Doctoral dissertation]. University of Manchester; 2012. [cited 2021 Mar 05].
Available from: https://www.research.manchester.ac.uk/portal/en/theses/real-options-theory-applied-to-renewable-energy-generation-projects-planning(280f3df5-f1be-4999-bd33-3931ce3cdbbd).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.555531.
Council of Science Editors:
Martinez-Cesena EA. Real options theory applied to renewable energy generation projects planning. [Doctoral Dissertation]. University of Manchester; 2012. Available from: https://www.research.manchester.ac.uk/portal/en/theses/real-options-theory-applied-to-renewable-energy-generation-projects-planning(280f3df5-f1be-4999-bd33-3931ce3cdbbd).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.555531
Iowa State University
21.
David, Nicholas.
The nature of double-fed induction generators for frequency and voltage support from wind turbines.
Degree: 2020, Iowa State University
URL: https://lib.dr.iastate.edu/etd/18301
► This research improves the understanding and utility of power electronic controlled grid-connected wind turbines by studying their physical capabilities. The primary topic is of inertia…
(more)
▼ This research improves the understanding and utility of power electronic controlled grid-connected wind turbines by studying their physical capabilities. The primary topic is of inertia and capability for frequency response. Frequency response characteristics of these turbines are not well understood and there is opportunity to improve the art of generator control to make better use of the resource. More specifically, it is hypothesized that physical inertia of the massive power electronic-coupled rotor hub assembly can provide a naturally stable fast frequency response. This is contrary to popular belief that wind turbines can only provide emulated inertia with methods like frequency-power droop control. This work first derives the estimated potential for load transient response considering the rotor mass and without control influence. A new low-inertia approach, in which the grid frequency is assumed to be non-constant, proves that sufficient inertia and response capability exists. It shows that even though a wind turbine rotor is indirectly coupled to the grid via power electronics, there is still an inherent frequency response provided by nature of the system dynamics, even if not intended. Wind turbine controllers in use today work to emulate the effects of synchronous inertia on frequency response, but they do not use the capability in a natural and fulfilling way. In fact, today's state-of-the art controllers are already understood to be insufficient for a 100% wind-powered system, by way of practice and observation. What is lacking is an ability to provide adequate fast frequency response for regulation during transient. To that point, it is shown here that double-fed induction generator wind turbines without well-designed frequency control can actually have a temporary load-rejecting response. Here, the connection of physical inertia and control design to frequency response is quantified with transfer functions derived for the wind turbine electromechanical and electromagnetic systems.
Using the non-constant frequency assumption, this work then proposes a generator PE controller to correct and prescribe the frequency response; voltage response is designed in a similar way. It modifies the dynamic properties and affords the ability to provide adequate frequency response from physical inertia. The controller adds frequency- and voltage-responsive transient-only components to the already-existing generator qd current commands of steady-state torque and reactive power controllers, respectively. Control parameters are designed using the DFIG dynamic model to place poles and zeros of the respective transfer functions. In this way, response is predefined and stability is assured with a prescribed control action. The effect is faster frequency regulation (approximately 1.5x faster) with higher nadir and arrested frequency when compared to the current art of droop control. Additionally, the duration of load-support response is limited only by the stored energy capacity of the rotating mass. With the proposed…
Subjects/Keywords: control systems; frequency response; power electronics; power systems; wind energy
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APA ·
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Export
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APA (6th Edition):
David, N. (2020). The nature of double-fed induction generators for frequency and voltage support from wind turbines. (Thesis). Iowa State University. Retrieved from https://lib.dr.iastate.edu/etd/18301
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):
David, Nicholas. “The nature of double-fed induction generators for frequency and voltage support from wind turbines.” 2020. Thesis, Iowa State University. Accessed March 05, 2021.
https://lib.dr.iastate.edu/etd/18301.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
David, Nicholas. “The nature of double-fed induction generators for frequency and voltage support from wind turbines.” 2020. Web. 05 Mar 2021.
Vancouver:
David N. The nature of double-fed induction generators for frequency and voltage support from wind turbines. [Internet] [Thesis]. Iowa State University; 2020. [cited 2021 Mar 05].
Available from: https://lib.dr.iastate.edu/etd/18301.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
David N. The nature of double-fed induction generators for frequency and voltage support from wind turbines. [Thesis]. Iowa State University; 2020. Available from: https://lib.dr.iastate.edu/etd/18301
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Ryerson University
22.
Montazeri, Miad Mohaghegh.
Improved Low Voltage Ride Through Capability of Wind Farm using STATCOM.
Degree: 2011, Ryerson University
URL: https://digital.library.ryerson.ca/islandora/object/RULA%3A1658
► Using power electronic converters with reduced capacity in doubly-fed induction generator (DFIG) based wind turbines make them vulnerable to over-current during grid disturbances. This thesis…
(more)
▼ Using power electronic converters with reduced capacity in doubly-fed induction generator (DFIG) based
wind turbines make them vulnerable to over-current during grid disturbances. This thesis aims to analyze the behaviour of doubly-fed induction generators based
wind farm for various timing schemes of crowbar deactivation and resumption of rotor side converter (RSC) in the case of grid fault. Also, usage of a static synchronous compensator (STATCOM) for the purpose of stabilizing the grid voltage after a three-phase fault is studied in this these. Moreover, finding minimum capacity of STATCOM which ensures low-voltage ride through (LVRT) of
wind farm is studied. Finally, coordination of reactive power from
wind turbine generators and STATCOM in steady-state condition is performed. All the results in this thesis show that STATCOM improves low voltage ride through (LVRT) capability of
wind farm and assists for an uninterrupted operation of
wind turbine generators during grid faults.
Advisors/Committee Members: Ryerson University (Degree grantor).
Subjects/Keywords: Wind turbines – Mathematical models; Wind energy conversion systems – Mathematical models; Wind turbines – Automatic control; Capacitors; Synchronous; Atmospheric turbulence – Mathematical models
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Export
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Manager
APA (6th Edition):
Montazeri, M. M. (2011). Improved Low Voltage Ride Through Capability of Wind Farm using STATCOM. (Thesis). Ryerson University. Retrieved from https://digital.library.ryerson.ca/islandora/object/RULA%3A1658
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):
Montazeri, Miad Mohaghegh. “Improved Low Voltage Ride Through Capability of Wind Farm using STATCOM.” 2011. Thesis, Ryerson University. Accessed March 05, 2021.
https://digital.library.ryerson.ca/islandora/object/RULA%3A1658.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Montazeri, Miad Mohaghegh. “Improved Low Voltage Ride Through Capability of Wind Farm using STATCOM.” 2011. Web. 05 Mar 2021.
Vancouver:
Montazeri MM. Improved Low Voltage Ride Through Capability of Wind Farm using STATCOM. [Internet] [Thesis]. Ryerson University; 2011. [cited 2021 Mar 05].
Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A1658.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Montazeri MM. Improved Low Voltage Ride Through Capability of Wind Farm using STATCOM. [Thesis]. Ryerson University; 2011. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A1658
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Ryerson University
23.
Dadhania, Amitkumar.
Modeling of Doubly Fed Induction Generators for Distribution System Power Flow Analysis.
Degree: 2010, Ryerson University
URL: https://digital.library.ryerson.ca/islandora/object/RULA%3A971
► Large-scale integration of Wind Generators (WGs) with distribution systems is underway right across the globe in a drive to harness green energy. The Doubly Fed…
(more)
▼ Large-scale integration of
Wind Generators (WGs) with distribution
systems is underway right across the globe in a drive to harness green energy. The Doubly Fed Induction Generator (DFIG) is an important type of WG due to its robustness and versatility. Its accurate and efficient modeling is very important in distribution
systems planning and analysis studies, as the older approximate representation method (the constant PQ model) is no longer sufficient given the scale of integration of WGs.This thesis proposes a new three-phase model for the DFIG, compatible with unbalanced three-phase distribution
systems, by deriving an analytical representation of its three major components, namely the
wind turbine, the voltage source converter, and the wound-rotor induction machine. The proposed model has a set of nonlinear equations that yields the total three-phase active and reactive powers injected into the grid by the DFIG as a function of the grid voltage and
wind turbine parameters. This proposed model is integrated with a three-phased unbalanced power flow method and reported in this thesis. The proposed method opens up a new way to conduct power flow studies on unbalanced distribution
systems with WGs.The proposed DFIG model is verified using Matlab-Simulink. IEEE 37-bus test system data from the IEEE Distribution System sub-committee is used to benchmark the results of the power flow method.
Advisors/Committee Members: Venkatesh, Bala (Thesis advisor), Sood, Vijay (Thesis advisor), Ryerson University (Degree grantor).
Subjects/Keywords: Wind turbines – Mathematical models; Wind energy conversion systems – Mathematical models; Electric machinery; Induction – Mathematical models; Wind turbines – Automatic control
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APA ·
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Manager
APA (6th Edition):
Dadhania, A. (2010). Modeling of Doubly Fed Induction Generators for Distribution System Power Flow Analysis. (Thesis). Ryerson University. Retrieved from https://digital.library.ryerson.ca/islandora/object/RULA%3A971
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):
Dadhania, Amitkumar. “Modeling of Doubly Fed Induction Generators for Distribution System Power Flow Analysis.” 2010. Thesis, Ryerson University. Accessed March 05, 2021.
https://digital.library.ryerson.ca/islandora/object/RULA%3A971.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Dadhania, Amitkumar. “Modeling of Doubly Fed Induction Generators for Distribution System Power Flow Analysis.” 2010. Web. 05 Mar 2021.
Vancouver:
Dadhania A. Modeling of Doubly Fed Induction Generators for Distribution System Power Flow Analysis. [Internet] [Thesis]. Ryerson University; 2010. [cited 2021 Mar 05].
Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A971.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Dadhania A. Modeling of Doubly Fed Induction Generators for Distribution System Power Flow Analysis. [Thesis]. Ryerson University; 2010. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A971
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Durban University of Technology
24.
Aluko, Anuoluwapo Oluwatobiloba.
Modelling and performance analysis of doubly fed induction generator wind farm.
Degree: 2018, Durban University of Technology
URL: http://hdl.handle.net/10321/3177
► Submitted in fulfillment of the requirements for the degree of Master of Engineering in Electrical Power Engineering, Durban University of Technology, Durban, South Africa, 2018.…
(more)
▼ Submitted in fulfillment of the requirements for the degree of Master of Engineering in Electrical Power Engineering, Durban University of Technology, Durban, South Africa, 2018.
Power generation from renewable sources like wind and sun have increased substantially owing to various challenges such as government regulations, environmental pollution and depletion of non-renewable energy sources over the past few decades. Of all renewable energy sources, wind appears to be the foremost of choice due to economies of scale. Due the intermittent nature of wind, the increase in the penetration of wind power to the grid gives rise to several challenges in which power quality is the most critical. The mitigation of power quality challenges to grid-connected wind energy systems and other renewable energy plants led to the development of the renewable energy grid code. This research focuses on voltage quality as one of the power quality issues affecting connection of renewable energy plants to the grid.
This research models and performs analysis of a grid-connected doubly fed induction generator (DFIG) wind farm. Using the IEEE 9 bus system as a base case for the study, the modelled wind farm is then integrated into the base case. Steady state performance and performance during faults are analyzed using load flow study and transient stability studies respectively. The load flow study is carried out to comparatively evaluate the steady state stability of the base case and the wind farm integrated network with respect to the NRS 048 South Africa standard. The transient stability study is carried out on the wind farm integrated network with compliance to the South Africa renewable energy grid code (SAREGC) which allows the wind farm to reduce active power production during a continuous low voltage event below 85% at the point of common coupling. This work compensates the wind farm with a static synchronous compensator (STATCOM) to keep the voltage at the point of common coupling above the set point, thereby keeping the wind farm connected to the grid and supplying maximum active power during a low voltage event. The results show that the static synchronous compensator allows the wind farm ride through a low voltage event without disconnection and reduction in active power supply and the wind farm increases the transient stability of the network.
M
Advisors/Committee Members: Akindeji, Kayode Timothy, Dorrell, D.G., Sewchurran, Sanjeeth.
Subjects/Keywords: Wind power plants – Computer simulation; Wind power plants – Mathematical models; Induction generators; Wind energy conversion systems; Renewable energy sources
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Export
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Manager
APA (6th Edition):
Aluko, A. O. (2018). Modelling and performance analysis of doubly fed induction generator wind farm. (Thesis). Durban University of Technology. Retrieved from http://hdl.handle.net/10321/3177
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):
Aluko, Anuoluwapo Oluwatobiloba. “Modelling and performance analysis of doubly fed induction generator wind farm.” 2018. Thesis, Durban University of Technology. Accessed March 05, 2021.
http://hdl.handle.net/10321/3177.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Aluko, Anuoluwapo Oluwatobiloba. “Modelling and performance analysis of doubly fed induction generator wind farm.” 2018. Web. 05 Mar 2021.
Vancouver:
Aluko AO. Modelling and performance analysis of doubly fed induction generator wind farm. [Internet] [Thesis]. Durban University of Technology; 2018. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10321/3177.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Aluko AO. Modelling and performance analysis of doubly fed induction generator wind farm. [Thesis]. Durban University of Technology; 2018. Available from: http://hdl.handle.net/10321/3177
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Ryerson University
25.
Farahani, Kamran Masteri.
Modeling and Analysis of a Flywheel Energy Storage System for Voltage Regulation.
Degree: 2012, Ryerson University
URL: https://digital.library.ryerson.ca/islandora/object/RULA%3A1867
► Ontario in 21st century is progressing rapidly to source a bulk of its energy supply from green and renewable energy sources, including wind energy. However…
(more)
▼ Ontario in 21st century is progressing rapidly to source a bulk of its energy supply from green and renewable energy sources, including
wind energy. However there are technical challenges. A significant limiting factor in the large-scale integration of
wind energy is the inherent intermittent nature of
wind supply. The purpose of the research project is to develop appropriate control
systems to integrate energy storage into the Ontario electricity grid given that energy storage constitutes a fundamental component of a modernized electricity grid. The challenges are multiple. Given that
wind generators driven by
wind have an output that is intermittent and highly variable, as a result the power supply voltages on distribution lines change at a rapid rate. This research develops a control strategy for the flywheel system to inject or draw real power to or from the connected line on a voltage command, thereby mitigating voltage swings created by variable and intermittent power supply from
wind generators.
Advisors/Committee Members: Ryerson University (Degree grantor).
Subjects/Keywords: Flywheels – Ontario – Mathematical models; Energe storage; Wind energy conversion systems; Wind turbines
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APA (6th Edition):
Farahani, K. M. (2012). Modeling and Analysis of a Flywheel Energy Storage System for Voltage Regulation. (Thesis). Ryerson University. Retrieved from https://digital.library.ryerson.ca/islandora/object/RULA%3A1867
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):
Farahani, Kamran Masteri. “Modeling and Analysis of a Flywheel Energy Storage System for Voltage Regulation.” 2012. Thesis, Ryerson University. Accessed March 05, 2021.
https://digital.library.ryerson.ca/islandora/object/RULA%3A1867.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Farahani, Kamran Masteri. “Modeling and Analysis of a Flywheel Energy Storage System for Voltage Regulation.” 2012. Web. 05 Mar 2021.
Vancouver:
Farahani KM. Modeling and Analysis of a Flywheel Energy Storage System for Voltage Regulation. [Internet] [Thesis]. Ryerson University; 2012. [cited 2021 Mar 05].
Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A1867.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Farahani KM. Modeling and Analysis of a Flywheel Energy Storage System for Voltage Regulation. [Thesis]. Ryerson University; 2012. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A1867
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Ryerson University
26.
Tan, Xiatian.
A novel configuration and control of CSI wind energy system with diode rectifier and buck converter.
Degree: 2011, Ryerson University
URL: https://digital.library.ryerson.ca/islandora/object/RULA%3A1162
► This thesis is dedicated to the research of a new converter configuration and control scheme development for direct drive permanent magnet synchronous generator (PMSG) based…
(more)
▼ This thesis is dedicated to the research of a new converter configuration and control scheme development for direct drive permanent magnet synchronous generator (PMSG) based high power
wind energy conversion system (WECS). The proposed converter consists of a diode rectifier, a buck converter and a pulse-width modulated (PWM) current source inverter (CSI). Detailed feasibility study of the proposed configuration is conducted based on the theoretical analysis. A suitable control scheme is designed to optimize the system performance. The maximum power point tracking (MPPT) is achieved through duty cycle adjustment of the buck converter, while the reactive power delivery and the DC current regulation are realized by the CSI controller through manipulating modulation index and delay angle. More importantly, the DC current is evaluated and controlled to the minimum value at various operating conditions.Simulation of a 2 MW WECS is carried out in Matlab/Simulink to verity the control objectives of MPPT, power factor adjustment and DC current minimization. The simulation results prove the feasibility of the proposed system that serves as an attracting alternative for high power WECS.
Advisors/Committee Members: Wu, Bin (Thesis advisor), Ryerson University (Degree grantor).
Subjects/Keywords: Wind power; Wind energy conversion systems – Design and construction; Electric current rectifiers
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APA (6th Edition):
Tan, X. (2011). A novel configuration and control of CSI wind energy system with diode rectifier and buck converter. (Thesis). Ryerson University. Retrieved from https://digital.library.ryerson.ca/islandora/object/RULA%3A1162
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):
Tan, Xiatian. “A novel configuration and control of CSI wind energy system with diode rectifier and buck converter.” 2011. Thesis, Ryerson University. Accessed March 05, 2021.
https://digital.library.ryerson.ca/islandora/object/RULA%3A1162.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Tan, Xiatian. “A novel configuration and control of CSI wind energy system with diode rectifier and buck converter.” 2011. Web. 05 Mar 2021.
Vancouver:
Tan X. A novel configuration and control of CSI wind energy system with diode rectifier and buck converter. [Internet] [Thesis]. Ryerson University; 2011. [cited 2021 Mar 05].
Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A1162.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Tan X. A novel configuration and control of CSI wind energy system with diode rectifier and buck converter. [Thesis]. Ryerson University; 2011. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A1162
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Ryerson University
27.
Yaramasu, Venkata Narasimha Rao.
Predictive control of multilevel converters for megawatt wind energy conversion systems.
Degree: 2014, Ryerson University
URL: https://digital.library.ryerson.ca/islandora/object/RULA%3A3459
► This dissertation proposes two novel medium voltage (MV) multilevel converter configurations for use with permanent magnet synchronous generator (PMSG) based megawatt (MW) wind energy conversion…
(more)
▼ This dissertation proposes two novel medium voltage (MV) multilevel converter configurations
for use with permanent magnet synchronous generator (PMSG) based megawatt
(MW)
wind energy conversion
systems (WECS). The classical control techniques, based on
linear PI regulators and low band-width modulation, present several technical issues during
lower switching frequency operation. To overcome these issues, a high performance finite
control-set model predictive control (FCS-MPC) strategy is proposed to control the power
converters employed in the MW-PMSG-WECS.
The proposed three-level and four-level converters combine the advantages of proven
wind
turbine technologies, such as low-cost generator-side passive converters, and efficient gridside
multilevel converters. The intermediate dc-dc multilevel converters ensure balancing
of the capacitor voltages during all operating conditions. With this feature, the grid-side
multilevel converters produce better grid current waveforms compared to the back-to-back
connected converters.
A generalized approach for the predictive control of an n-level diode-clamped converter
was investigated. The FCS-MPC strategy for current control and decoupled active/reactive
power regulation of grid-connected multilevel converters was also analyzed. The major WECS requirements such as maximum power point tracking, balancing of dc-link capacitor
voltages, switching frequency minimization, common-mode voltage mitigation, regulation
of net dc-bus voltage, and grid reactive power control have been modeled in terms of
power converter switching states. These control objectives have been accomplished during
each sampling interval by selecting the switching states which minimize the generator- and
grid-side cost functions.
Issues related to the weighting factors selection, control delay compensation, accurate
extrapolation of references, control of variable switching frequency nature, prediction of
variables over two samples with reduced computational burden, and robustness analysis, are
also addressed in this dissertation.
To keep the dc-bus voltage constant during low voltage ride-through operation, predictive
control scheme is proposed for the power converters while storing surplus energy in the
turbine-generator rotor inertia. The generation and exchange of reference control variables
during symmetrical grid voltage dips is suggested to meet the grid code requirements. The
proposed solution is efficient as no energy is dissipated in the dc-link crowbar.
The simulation and experimental results validate the proposed MV converters and predictive
control schemes.
Advisors/Committee Members: Wu, Bin (Thesis advisor), Ryerson University (Degree grantor).
Subjects/Keywords: Wind energy conversion systems; Electric current converters – Automatic control; Predictive control; Wind power
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CSE |
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APA (6th Edition):
Yaramasu, V. N. R. (2014). Predictive control of multilevel converters for megawatt wind energy conversion systems. (Thesis). Ryerson University. Retrieved from https://digital.library.ryerson.ca/islandora/object/RULA%3A3459
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):
Yaramasu, Venkata Narasimha Rao. “Predictive control of multilevel converters for megawatt wind energy conversion systems.” 2014. Thesis, Ryerson University. Accessed March 05, 2021.
https://digital.library.ryerson.ca/islandora/object/RULA%3A3459.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Yaramasu, Venkata Narasimha Rao. “Predictive control of multilevel converters for megawatt wind energy conversion systems.” 2014. Web. 05 Mar 2021.
Vancouver:
Yaramasu VNR. Predictive control of multilevel converters for megawatt wind energy conversion systems. [Internet] [Thesis]. Ryerson University; 2014. [cited 2021 Mar 05].
Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A3459.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Yaramasu VNR. Predictive control of multilevel converters for megawatt wind energy conversion systems. [Thesis]. Ryerson University; 2014. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A3459
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Stellenbosch University
28.
Mbukani, Mwana Wa Kalaga.
Position/speed sensor-less control of wind energy conversion systems based on Rotor-Tied Doubly-Fed induction generator systems.
Degree: PhD, Electrical and Electronic Engineering, 2019, Stellenbosch University
URL: http://hdl.handle.net/10019.1/107085
► ENGLISH ABSTRACT: The doubly-fed induction generator (DFIG) is amongst the most popular wind turbine generator in South Africa. This is partly due to the fact…
(more)
▼ ENGLISH ABSTRACT: The doubly-fed induction generator (DFIG) is amongst the most popular wind
turbine generator in South Africa. This is partly due to the fact that its backtoback power converters are partially rated. More precisely, they are rated at 30% of the generator rated power. A new DFIG topology has been proposed recently. That is the rotor-tied doubly-fed induction generator (RDFIG). In this topology, the rotor side is connected to the grid while the stator side is
connected to the power converter. It has been shown that this topology holds the advantage of higher effeciency compared to the standard DFIG topology.
High accuracy in all the measurements is required for the optimum operations of wind energy conversion systems (WECSs). The measurement of the rotor position/speed is amongst the most important measurements when it comes
to implement any control system for the WECS. The conventional method of measuring the rotor position/speed is to use an electronic/mechanical sensor (encoder or resolver). This measurement involves the use of long cables and
in a harsh environment, this can lead to faulty operations of the WECS.
In this thesis, several slip speed estimators for sensor-less control of RDFIGbased WECSs are developed and implemented. The proposed slip speed estimators
are based on the association of different sliding mode observers and the PLL estimator. The association of the PLL estimator improves the estimation performance by reducing the noise created by the sliding control control functions.
Also, the proposed PLL estimator helps in avoiding a phase shift of π in super-synchronous operating conditions. In addition, in this thesis, several sliding mode observers were developed in order to improve the estimation performance.
The proposed sliding mode observers were satisfactory for all the operating conditions of the RDFIG-based WECSs.
The robustness of the proposed slip speed estimators is validated experimentally under various operating conditions. A 5.5-kW custom-designed gridconnected
RDFIG test-bench based on a National Instrument (NI) PXIe-8115 controller is used. The proposed slip speed estimators solve the problem linked to the failure of the electromechanical sensors. The overall sensor-less control
strategy provides an alternative to the sensor-based control of the RDFIGs.
Also, the proposed sensor-less vector control strategy can be used as a back-up in case the electromechanical sensor fails.
AFRIKAANSE OPSOMMING: Die dubbelgevoerde induksiegenerator (DFIG) is een van die gewildste windturbinegenerators in Suid-Afrika. Dit is deels as gevolg van die laer kapasiteit omsetters wat die DFIG benodig. 'n Nuwe DFIG-topologie is onlangs voorgestel:
Die rotorgebonde DFIG (RDFIG). In dié topologie word die masjien se
rotor aan die netwerk gekoppel en die stator aan laer kapasiteit omsetters. Dit is bewys dat hierdie topologie 'n hoër masjieneffektiwiteit het in vergelyking met die standaard-DFIG.
Hoë akkuraatheid van metings word vereis vir die optimale beheer van…
Advisors/Committee Members: Gule, Nkosinathi, Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering..
Subjects/Keywords: UCTD; Wind power; Wind energy conversion systems; Rotors; Doubly-fed induction generator
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APA ·
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CSE |
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APA (6th Edition):
Mbukani, M. W. K. (2019). Position/speed sensor-less control of wind energy conversion systems based on Rotor-Tied Doubly-Fed induction generator systems. (Doctoral Dissertation). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/107085
Chicago Manual of Style (16th Edition):
Mbukani, Mwana Wa Kalaga. “Position/speed sensor-less control of wind energy conversion systems based on Rotor-Tied Doubly-Fed induction generator systems.” 2019. Doctoral Dissertation, Stellenbosch University. Accessed March 05, 2021.
http://hdl.handle.net/10019.1/107085.
MLA Handbook (7th Edition):
Mbukani, Mwana Wa Kalaga. “Position/speed sensor-less control of wind energy conversion systems based on Rotor-Tied Doubly-Fed induction generator systems.” 2019. Web. 05 Mar 2021.
Vancouver:
Mbukani MWK. Position/speed sensor-less control of wind energy conversion systems based on Rotor-Tied Doubly-Fed induction generator systems. [Internet] [Doctoral dissertation]. Stellenbosch University; 2019. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10019.1/107085.
Council of Science Editors:
Mbukani MWK. Position/speed sensor-less control of wind energy conversion systems based on Rotor-Tied Doubly-Fed induction generator systems. [Doctoral Dissertation]. Stellenbosch University; 2019. Available from: http://hdl.handle.net/10019.1/107085
University of Arkansas
29.
Morris, Jessica M.
Experimentation and Modeling of the Effects of Along-Wind Dispersion on Cloud Characteristics of Finite-Duration Contaminant Releases in the Atmosphere.
Degree: PhD, 2018, University of Arkansas
URL: https://scholarworks.uark.edu/etd/3088
► Along-wind dispersion, or stretching of the cloud in the direction of the wind, plays an important role in the concentration and modeling of contaminant…
(more)
▼ Along-
wind dispersion, or stretching of the cloud in the direction of the
wind, plays an important role in the concentration and modeling of contaminant releases in the atmosphere. Theoretical and empirical derivations were compared for appropriate parameterization of along-
wind dispersion. Available field data were analyzed to evaluate and improve previous parameterizations of the along-
wind dispersion coefficient, σ_x. An experimental test program was developed and executed in an ultra-low speed
wind tunnel at the Chemical Hazards Research Center to determine the effects of the time distribution coefficient on true finite-duration releases from an original area source. Multiple
wind speeds, release durations, and downwind distances were investigated with ensemble averages for improved quality of the cloud characteristics for each set of test conditions. An overall relationship between the time of peak arrival (TOPa) and the time distribution coefficient σ_t= 0.23*TOPa was demonstrated across all parameters. From this relationship, the along-
wind dispersion coefficient can be accurately predicted and scaled appropriately. Additional relationships for the leading and trailing edges of the cloud are appropriately modeled.
Advisors/Committee Members: Tom O. Spicer III, Jerry Havens, Heather Walker.
Subjects/Keywords: Along-wind Dispersion; Atmosphere; Finite-duration Releases; Modeling; Wind Tunnel; Process Control and Systems
Record Details
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APA ·
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APA (6th Edition):
Morris, J. M. (2018). Experimentation and Modeling of the Effects of Along-Wind Dispersion on Cloud Characteristics of Finite-Duration Contaminant Releases in the Atmosphere. (Doctoral Dissertation). University of Arkansas. Retrieved from https://scholarworks.uark.edu/etd/3088
Chicago Manual of Style (16th Edition):
Morris, Jessica M. “Experimentation and Modeling of the Effects of Along-Wind Dispersion on Cloud Characteristics of Finite-Duration Contaminant Releases in the Atmosphere.” 2018. Doctoral Dissertation, University of Arkansas. Accessed March 05, 2021.
https://scholarworks.uark.edu/etd/3088.
MLA Handbook (7th Edition):
Morris, Jessica M. “Experimentation and Modeling of the Effects of Along-Wind Dispersion on Cloud Characteristics of Finite-Duration Contaminant Releases in the Atmosphere.” 2018. Web. 05 Mar 2021.
Vancouver:
Morris JM. Experimentation and Modeling of the Effects of Along-Wind Dispersion on Cloud Characteristics of Finite-Duration Contaminant Releases in the Atmosphere. [Internet] [Doctoral dissertation]. University of Arkansas; 2018. [cited 2021 Mar 05].
Available from: https://scholarworks.uark.edu/etd/3088.
Council of Science Editors:
Morris JM. Experimentation and Modeling of the Effects of Along-Wind Dispersion on Cloud Characteristics of Finite-Duration Contaminant Releases in the Atmosphere. [Doctoral Dissertation]. University of Arkansas; 2018. Available from: https://scholarworks.uark.edu/etd/3088
Cape Peninsula University of Technology
30.
Luta, Doudou Nanitamo.
Modelling of hybrid solar wind integrated generation systems in an electrical distribution network
.
Degree: 2014, Cape Peninsula University of Technology
URL: http://etd.cput.ac.za/handle/20.500.11838/1177
► The research in this thesis deals with the application of Model Based Systems Engineering (MBSE) practices in the modelling of power systems. More particularly, we…
(more)
▼ The research in this thesis deals with the application of Model Based Systems Engineering (MBSE) practices in the modelling of power systems. More particularly, we have presented the modelling hybrid photovoltaic wind integrated in an electrical distribution network using SysML (System Modelling Language) which is a modelling language in support of MBSE. MBSE refers to a formalised practice of systems development through the application of modelling principles, methods, languages and tools to the entire lifecycle of a system.
Generally speaking, the modelling of power systems is performed using software such as Matlab Simulink, DigSilent, PowerWorld etc. These software programs allow modelling of a system considering only a specific viewpoint, depending on the objective that is to be assessed.
The advantage of the SysML over the above mentioned modelling languages lies from the fact that SysML includes different viewpoints of a system. These views are known as the Four Pillars of SysML. Pillar One refers to the requirements of a system and includes all the functional and non-functional requirements. Pillar Two deals with the structure representation of a system by considering all its subsystems and their different connections. Pillar Three considers the behaviour of a system and includes its activities, sequences and different states. The last Pillar includes the detailed characteristics, physical laws and constraints on the system.
The main objectives of this research are the development of models which will include: the system’s requirements; the system’s structure representation in term of different entities involved and the relationship between them; the system’s behaviours in terms of activities in different cases considered and transitions from one state to another as well as the interaction between the system and all the stakeholders.
Keywords: Model Based Systems Engineering (MBSE), System Modelling Language (SysML), Renewable Energy systems, Hybrid power systems, photovoltaic systems, wind power systems.
Subjects/Keywords: Solar wind;
Hybrid power systems;
Electric power distribution;
Solar energy – Hybrid systems;
Systems engineering
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APA ·
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MLA ·
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to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Luta, D. N. (2014). Modelling of hybrid solar wind integrated generation systems in an electrical distribution network
. (Thesis). Cape Peninsula University of Technology. Retrieved from http://etd.cput.ac.za/handle/20.500.11838/1177
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):
Luta, Doudou Nanitamo. “Modelling of hybrid solar wind integrated generation systems in an electrical distribution network
.” 2014. Thesis, Cape Peninsula University of Technology. Accessed March 05, 2021.
http://etd.cput.ac.za/handle/20.500.11838/1177.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Luta, Doudou Nanitamo. “Modelling of hybrid solar wind integrated generation systems in an electrical distribution network
.” 2014. Web. 05 Mar 2021.
Vancouver:
Luta DN. Modelling of hybrid solar wind integrated generation systems in an electrical distribution network
. [Internet] [Thesis]. Cape Peninsula University of Technology; 2014. [cited 2021 Mar 05].
Available from: http://etd.cput.ac.za/handle/20.500.11838/1177.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Luta DN. Modelling of hybrid solar wind integrated generation systems in an electrical distribution network
. [Thesis]. Cape Peninsula University of Technology; 2014. Available from: http://etd.cput.ac.za/handle/20.500.11838/1177
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
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