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Oregon State University
1.
Cicilio, Phylicia.
Dynamic Load Model Placement and Development with Case Study of Microgrid in Nome, Alaska.
Degree: MS, 2017, Oregon State University
URL: http://hdl.handle.net/1957/61896 
► Dynamic modeling is key to the successful operation and reliability of electrical grids by evaluating transient stability. Developing dynamic load models and identifying where they…
(more)
▼ Dynamic modeling is key to the successful operation and reliability of electrical grids by evaluating transient stability. Developing dynamic load models and identifying where they are necessary is a challenging task as loads are an aggregation of individual devices that change throughout the year. This thesis investigates how to develop those load models and provides preliminary guidelines for where to prioritize placement of dynamic load models in the system.
A case study in Nome, Alaska is performed on developing a dynamic load model for their microgrid. Electricity cost in Alaska's rural communities reaches up to five times higher than the national average. Theses rural communities' microgrids are powered primarily by diesel generators causing high electricity costs. This thesis examines the community of Nome, Alaska which has installed wind turbines to combat their dependency on diesel. Intermittent generation from the wind turbines can compromise the grid's resiliency and reliability. Dynamic modeling and reliability analysis are necessary to analyze possible solutions for stabilizing the grid. Adequate fidelity for the load model is necessary to perform dynamic simulations. A static ZIP load model and composite load model are created in this paper and are compared for improved modelling. Additionally, this load benchmark is used to evaluate the integration of an energy storage device to Nome's microgrid for improved transient stability. Using the composite load model in the microgrid model, a battery is modeled using the PSS/E CBEST energy storage model, demonstrating the transient stability improvement provided by installing an energy storage device to the grid. Any microgrid utility, such as in Nome, Alaska, can adapt and use this load model development process depending on available computation resources and necessary data resolution for a particular generation and demand portfolio.
Advisors/Committee Members: Cotilla-Sanchez, Eduardo (advisor), Brekken, Ted (committee member).
Subjects/Keywords: power systems
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APA (6th Edition):
Cicilio, P. (2017). Dynamic Load Model Placement and Development with Case Study of Microgrid in Nome, Alaska. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/61896
Chicago Manual of Style (16th Edition):
Cicilio, Phylicia. “Dynamic Load Model Placement and Development with Case Study of Microgrid in Nome, Alaska.” 2017. Masters Thesis, Oregon State University. Accessed December 16, 2019.
http://hdl.handle.net/1957/61896.
MLA Handbook (7th Edition):
Cicilio, Phylicia. “Dynamic Load Model Placement and Development with Case Study of Microgrid in Nome, Alaska.” 2017. Web. 16 Dec 2019.
Vancouver:
Cicilio P. Dynamic Load Model Placement and Development with Case Study of Microgrid in Nome, Alaska. [Internet] [Masters thesis]. Oregon State University; 2017. [cited 2019 Dec 16].
Available from: http://hdl.handle.net/1957/61896.
Council of Science Editors:
Cicilio P. Dynamic Load Model Placement and Development with Case Study of Microgrid in Nome, Alaska. [Masters Thesis]. Oregon State University; 2017. Available from: http://hdl.handle.net/1957/61896
McMaster University
2.
Al-Musawi, Laith.
SHUNT ACTIVE POWER FILTERING FOR SMART APPLIANCES.
Degree: MASc, 2016, McMaster University
URL: http://hdl.handle.net/11375/19101
► Due to the increasing trend towards energy saving of white goods appliances and the commercial viability of power electronic components, there has been an expansion…
(more)
▼ Due to the increasing trend towards energy saving of white goods appliances and the commercial viability of power electronic components, there has been an expansion in the use of solid state electronics and variable frequency drive motors in these applications. However, a major drawback of using such energy efficient loads is the introduction of current harmonics onto the local distribution grid. Furthermore, the proliferation of such devices elevates the harmonic content of the supply voltage and the ensuing potential impact on residential distribution networks. This thesis investigates the harmonic content generated by some representative household appliances and suggests a solution to minimize current harmonics by means of active filtering. An active filter circuit is proposed and simulations will be undertaken to compare filter performance when used as an active front end versus a feeder input compensator. Further, a hardware design of the filter was implemented to experimentally verify the filter operation.
Thesis
Master of Applied Science (MASc)
Advisors/Committee Members: Al-Mutawaly, Nafia, Schofield, Nigel, Electrical and Computer Engineering.
Subjects/Keywords: Power Quality; Power Systems; Power Electronics; Control.
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APA (6th Edition):
Al-Musawi, L. (2016). SHUNT ACTIVE POWER FILTERING FOR SMART APPLIANCES. (Masters Thesis). McMaster University. Retrieved from http://hdl.handle.net/11375/19101
Chicago Manual of Style (16th Edition):
Al-Musawi, Laith. “SHUNT ACTIVE POWER FILTERING FOR SMART APPLIANCES.” 2016. Masters Thesis, McMaster University. Accessed December 16, 2019.
http://hdl.handle.net/11375/19101.
MLA Handbook (7th Edition):
Al-Musawi, Laith. “SHUNT ACTIVE POWER FILTERING FOR SMART APPLIANCES.” 2016. Web. 16 Dec 2019.
Vancouver:
Al-Musawi L. SHUNT ACTIVE POWER FILTERING FOR SMART APPLIANCES. [Internet] [Masters thesis]. McMaster University; 2016. [cited 2019 Dec 16].
Available from: http://hdl.handle.net/11375/19101.
Council of Science Editors:
Al-Musawi L. SHUNT ACTIVE POWER FILTERING FOR SMART APPLIANCES. [Masters Thesis]. McMaster University; 2016. Available from: http://hdl.handle.net/11375/19101
Georgia Tech
3.
Ainsworth, Nathan Grey.
Towards a distributed control regime for robust synchronization and power sharing of inverter-based ac power networks.
Degree: PhD, Electrical and Computer Engineering, 2014, Georgia Tech
URL: http://hdl.handle.net/1853/53985
► The objective of the proposed research is 1) to develop a general dynamic condition sufficient to ensure frequency synchronization of inverter-based AC power networks, and…
(more)
▼ The objective of the proposed research is 1) to develop a general dynamic condition sufficient to ensure frequency synchronization of inverter-based AC
power networks, and 2) to develop a distributed control regime that is capable of guaranteeing that the above condition holds for a scalable class of such networks. I will first develop a structure-preserving model of an arbitrary network whose sources are all inverters operating frequency-droop control. By applying graph theoretic methods to the model, I will show that there exists a “safe operating region” of the state space such that if the network angle trajectory stays in this region, then frequency synchronization is shown by Lyapunov-like methods. By analogy to similar problems solved in other applications, I will develop a new distributed control regime to constrain a network of the target class to the safe operating region, thus guaranteeing frequency synchronization. These techniques may form the basis for future development of ultra-reliable, scalable inverter-based networks.
Advisors/Committee Members: Grijalva, Santiago (advisor), Egerstedt, Magnus (committee member), Harley, Ronald (committee member), Saeedifard, Maryam (committee member), Nemirovski, Arkadi (committee member).
Subjects/Keywords: Power systems; Control systems
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APA (6th Edition):
Ainsworth, N. G. (2014). Towards a distributed control regime for robust synchronization and power sharing of inverter-based ac power networks. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/53985
Chicago Manual of Style (16th Edition):
Ainsworth, Nathan Grey. “Towards a distributed control regime for robust synchronization and power sharing of inverter-based ac power networks.” 2014. Doctoral Dissertation, Georgia Tech. Accessed December 16, 2019.
http://hdl.handle.net/1853/53985.
MLA Handbook (7th Edition):
Ainsworth, Nathan Grey. “Towards a distributed control regime for robust synchronization and power sharing of inverter-based ac power networks.” 2014. Web. 16 Dec 2019.
Vancouver:
Ainsworth NG. Towards a distributed control regime for robust synchronization and power sharing of inverter-based ac power networks. [Internet] [Doctoral dissertation]. Georgia Tech; 2014. [cited 2019 Dec 16].
Available from: http://hdl.handle.net/1853/53985.
Council of Science Editors:
Ainsworth NG. Towards a distributed control regime for robust synchronization and power sharing of inverter-based ac power networks. [Doctoral Dissertation]. Georgia Tech; 2014. Available from: http://hdl.handle.net/1853/53985
University of Tasmania
4.
Hasan, KN.
Control of power electronic interfaces for photovoltaic power systems.
Degree: 2009, University of Tasmania
URL: https://eprints.utas.edu.au/20717/1/whole_HasanKaziNazmul2009_thesis.pdf
► This thesis deals with the control of power electronic interfaces for photovoltaic applications. The main objective is to develop and employ effective control algorithms and…
(more)
▼ This thesis deals with the control of power electronic interfaces for photovoltaic applications. The main objective is to develop and employ effective control algorithms and topologies that are optimally suited for photovoltaic power conversion systems. The studies, comprising of analysis, modeling, control and experimental evaluation, clearly enhance overall system performance. The major items of investigation in this thesis are power electronic converter design and modeling, current mode control, maximum power point tracking techniques, and control for energy storage systems.
The nonlinear and time varying characteristics of both the photovoltaic module and switch-mode power converters cause problems in photovoltaic systems control. The weather dependency of photovoltaic system makes these problems even more severe. As the photovoltaic source usually acts as a current source, this thesis proposes current mode control methods as a suitable control solution in photovoltaic power systems. The thesis proposes an improved algorithm, based on current mode control, to ensure an accurate tracking of the maximum power point of the photovoltaic module. In addition, four current mode control methods are investigated for the dc-dc converter controller to obtain a stable dc bus voltage. The results obtained are compared with the voltage mode control. Finally, a new control algorithm is proposed for charging and discharging of the photovoltaic battery storage system, which allows versatile power transfer among the photovoltaic source, battery and load.
Extensive simulation studies were performed based on MATLAB/Simulink/ Simpower to verify the control methods of the maximum power point tracking, dc-dc converter control and energy storage interface for a 3 KW photovoltaic power system. The current mode control methods have shown significant improvement in different aspects of the power quality, especially in case of input changes, load variations, transient responses and harmonics. A dSPACE DS1104 DSP (digital signal processor) hardware and software system was used in a prototype experimental evaluation to validate the improved performances of the current mode control of dc-dc converter for photovoltaic systems.
Subjects/Keywords: Photovoltaic power systems
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APA (6th Edition):
Hasan, K. (2009). Control of power electronic interfaces for photovoltaic power systems. (Thesis). University of Tasmania. Retrieved from https://eprints.utas.edu.au/20717/1/whole_HasanKaziNazmul2009_thesis.pdf
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):
Hasan, KN. “Control of power electronic interfaces for photovoltaic power systems.” 2009. Thesis, University of Tasmania. Accessed December 16, 2019.
https://eprints.utas.edu.au/20717/1/whole_HasanKaziNazmul2009_thesis.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Hasan, KN. “Control of power electronic interfaces for photovoltaic power systems.” 2009. Web. 16 Dec 2019.
Vancouver:
Hasan K. Control of power electronic interfaces for photovoltaic power systems. [Internet] [Thesis]. University of Tasmania; 2009. [cited 2019 Dec 16].
Available from: https://eprints.utas.edu.au/20717/1/whole_HasanKaziNazmul2009_thesis.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Hasan K. Control of power electronic interfaces for photovoltaic power systems. [Thesis]. University of Tasmania; 2009. Available from: https://eprints.utas.edu.au/20717/1/whole_HasanKaziNazmul2009_thesis.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Arkansas
5.
Wall, Robert.
Intelligent Application of Flexible AC Transmission System Components in an Evolving Power Grid.
Degree: MSEE, 2018, University of Arkansas
URL: https://scholarworks.uark.edu/etd/3043
► The world revolves around energy and the energy sector is continually transforming and evolving. The status quo has been set by governing agencies in…
(more)
▼ The world revolves around energy and the energy sector is continually transforming and evolving. The status quo has been set by governing agencies in the United States for completely reliable
power. The demand for energy efficiency continually rises for multiple reasons. Technology has improved for all sectors of the
power grid, including renewable energy sources, fault protection, and SMART grid technology. The addition of new energy sources has led to the decommissioning of inefficient energy sources. The implementation of new technologies and
power load on a large scale, coupled with the removal of grid stabilizers has posed different challenges that have been overcome using Flexible AC Transmission System devices or FACTS. FACTS devices increase
power quality, reliability and efficiency of a
power grid, if implemented correctly. With several different FACTS devices, the many
power grid situations and FACTS combinations must be methodically tested and planned. ETAP and MATLAB/SIMULINK simulate designed
power systems accurately with the additional functionality to model FACTS. The simulation of the IEEE nine bus model with potentially problematic variations applied show that FACTS components are required. The simulation show that the
power factor and energy efficiency increased with FACTS. The avoidance of blackouts with fault recovery was made plausible, with less overshoot and quicker convergence time. Finally, combining FACTS can increase the revitalization of the
power grid through the replacement of polluting generation to renewable generation.
Advisors/Committee Members: Roy A. McCann, Juan C. Balda, Larry J. Roe.
Subjects/Keywords: FACTS; Power Systems; Reactive Power Consumption; Energy Systems; Power and Energy
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APA (6th Edition):
Wall, R. (2018). Intelligent Application of Flexible AC Transmission System Components in an Evolving Power Grid. (Masters Thesis). University of Arkansas. Retrieved from https://scholarworks.uark.edu/etd/3043
Chicago Manual of Style (16th Edition):
Wall, Robert. “Intelligent Application of Flexible AC Transmission System Components in an Evolving Power Grid.” 2018. Masters Thesis, University of Arkansas. Accessed December 16, 2019.
https://scholarworks.uark.edu/etd/3043.
MLA Handbook (7th Edition):
Wall, Robert. “Intelligent Application of Flexible AC Transmission System Components in an Evolving Power Grid.” 2018. Web. 16 Dec 2019.
Vancouver:
Wall R. Intelligent Application of Flexible AC Transmission System Components in an Evolving Power Grid. [Internet] [Masters thesis]. University of Arkansas; 2018. [cited 2019 Dec 16].
Available from: https://scholarworks.uark.edu/etd/3043.
Council of Science Editors:
Wall R. Intelligent Application of Flexible AC Transmission System Components in an Evolving Power Grid. [Masters Thesis]. University of Arkansas; 2018. Available from: https://scholarworks.uark.edu/etd/3043
Stellenbosch University
6.
Steyn, Anrich Frederik Willem.
Modelling the technical influence of randomly distributed solar PV uptake on electrical distribution networks.
Degree: MEng, Electrical and Electronic Engineering, 2019, Stellenbosch University
URL: http://hdl.handle.net/10019.1/106150
► ENGLISH ABSTRACT: The solar photovoltaic (PV) industry has seen an exponential growth over the last decade, prompted mainly by government incentives and -regulations. Although the…
(more)
▼ ENGLISH ABSTRACT: The solar photovoltaic (PV) industry has seen an exponential growth over the last decade,
prompted mainly by government incentives and -regulations. Although the global PV industry is dominated by large, utility-scale PV plants, there has been an increase in the uptake of
distributed generation (DG) in the form of residential-, commercial- and industrial rooftop PV
systems. Globally, utilities are confronted with the issue of integrating DG into electrical distribution networks. The introduction of DG via renewable energy technologies will cause a metamorphosis of conventional passive
power systems into active
power systems. DG will influence the technical characteristics of conventional
power systems, posing technical challenges
with regards to operation and control of the
power system.
This project investigates network integration of distributed rooftop PV
systems on three distribution networks (one residential, one commercial and one industrial) in Cape Town,
South Africa. The residential and commercial networks are owned and operated by the City of Cape Town Municipality, whereas the industrial network is owned and operated by Eskom, the South African national electricity utility. Amidst the lack of a South African national standard with regard to distributed PV installations, the aim is to start to fill a void in
the understanding of PV network integration, in order to provide Eskom and CCT, as well as other local municipalities, with a better understanding of the technical effects of PV on
distribution networks, as well as the PV hosting capacity of these distribution networks.
This project develops a methodology that can be used to model the technical influence of randomly distributed solar PV uptake on electrical distribution networks. This study
focuses solely on the technical effects of voltage rise and equipment overload as network constraints for allowable PV uptake. The methodology first develops techniques with which to model network topology, -loads and PV generators. Subsequently, a simulation methodology is developed and applied to the distribution networks by means of algorithms developed in Digsilent Programming Language.
For the residential- and industrial area, the amount of PV-eligible roof space provides potential PV generation capacity that far exceeds the load requirements of the area. It is shown that allowable PV installations on the residential LV networks vary between 187 kW - 373 kW, and allowable PV penetration levels vary between 82% - 150%. Conductor overload and overvoltage constrain allowable PV uptake on the residential LV networks, whereas the residential MV/LV transformers provide adequate capacity to handle much higher PV penetration levels. The industrial network has the lowest allowable PV penetration level (31 %)
due to transformers being overloaded by large PV
systems. The commercial area experiences no limit to the uptake of PV, since there is not enough PV-eligible roofspace, and subsequent potential PV generation capacity, to cause network…
Advisors/Committee Members: Rix, A. J., Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering..
Subjects/Keywords: UCTD; Photovoltaic power systems; Electric power distribution; Electric power systems
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APA (6th Edition):
Steyn, A. F. W. (2019). Modelling the technical influence of randomly distributed solar PV uptake on electrical distribution networks. (Thesis). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/106150
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):
Steyn, Anrich Frederik Willem. “Modelling the technical influence of randomly distributed solar PV uptake on electrical distribution networks.” 2019. Thesis, Stellenbosch University. Accessed December 16, 2019.
http://hdl.handle.net/10019.1/106150.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Steyn, Anrich Frederik Willem. “Modelling the technical influence of randomly distributed solar PV uptake on electrical distribution networks.” 2019. Web. 16 Dec 2019.
Vancouver:
Steyn AFW. Modelling the technical influence of randomly distributed solar PV uptake on electrical distribution networks. [Internet] [Thesis]. Stellenbosch University; 2019. [cited 2019 Dec 16].
Available from: http://hdl.handle.net/10019.1/106150.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Steyn AFW. Modelling the technical influence of randomly distributed solar PV uptake on electrical distribution networks. [Thesis]. Stellenbosch University; 2019. Available from: http://hdl.handle.net/10019.1/106150
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of KwaZulu-Natal
7.
Ijumba, Nelson M.
System identification of classic HVDC systems.
Degree: 2011, University of KwaZulu-Natal
URL: http://hdl.handle.net/10413/9104
► Determining models from observations and studying the models’ properties is essentially the functionality of science. Models attempt to link observations into some pattern. System identification…
(more)
▼ Determining models from observations and studying the models’ properties is essentially the functionality of science. Models attempt to link observations into some pattern. System identification is the art of building mathematical models of dynamic systems based on observed data from the systems. This paper presents a system identification methodology that can be utilized to derive the classic HVDC plant transfer functions. The model development and verification was performed using the PSCAD/EMTDC software. The calculated results illustrated excellent response matching with the system results. The derived HVDC plant transfer functions can be utilized to perform small signal stability studies of HVDC-HVAC interactions and its use can also be extended to facilitate the analytical design of HVDC control systems.
Subjects/Keywords: Electric power systems.; Electric power systems – Computer programs.; HVDC control systems.
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APA (6th Edition):
Ijumba, N. M. (2011). System identification of classic HVDC systems. (Thesis). University of KwaZulu-Natal. Retrieved from http://hdl.handle.net/10413/9104
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):
Ijumba, Nelson M. “System identification of classic HVDC systems.” 2011. Thesis, University of KwaZulu-Natal. Accessed December 16, 2019.
http://hdl.handle.net/10413/9104.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ijumba, Nelson M. “System identification of classic HVDC systems.” 2011. Web. 16 Dec 2019.
Vancouver:
Ijumba NM. System identification of classic HVDC systems. [Internet] [Thesis]. University of KwaZulu-Natal; 2011. [cited 2019 Dec 16].
Available from: http://hdl.handle.net/10413/9104.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ijumba NM. System identification of classic HVDC systems. [Thesis]. University of KwaZulu-Natal; 2011. Available from: http://hdl.handle.net/10413/9104
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Rutgers University
8.
Sagar, Nishant, 1986-.
Powerline communications systems: overview and analysis.
Degree: MS, Electrical and Computer Engineering, 2011, Rutgers University
URL: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000061509
► The electric power distribution grid is a medium over which fast and reliable communication services can be provided. Power Line Communications (PLC) systems provide an…
(more)
▼ The electric
power distribution grid is a medium over which fast and reliable communication services can be provided.
Power Line Communications (PLC)
systems provide an alternative to wireless communications in the transmission of data within buildings and vehicles. In recent years, increased interest in PLC
systems for both commercial and residence applications has resulted in the development of standards for use of the electric
power grid as a communications channel conveying messages in addition to
power. The types of applications range from simple inexpensive services centered around networked household appliances, where data rates are on the order of kilobits per second, to Internet access via the electrical outlet wall socket, where data rates are on the order of megabits per second. Currently, PLC
systems can accommodate high- iii speed networking that includes broadband Internet access, voice over-IP, and the interconnectivity of home entertainment devices. The development of a
Power Line Communications system presents a significant challenge for the communications engineer due to the unusual channel characteristics that affect high-speed signal transmission. The electric
power grid is designed for, and operated at, 50/60 Hz throughout the world. Furthermore, the topology of a local electric
power grid network is often very irregular resulting in significant dispersion of the transmitted message signals. This thesis presents an overview of the major features and characteristics of PLC
systems, the fundamental properties of powerline channels, and an analysis of PLC system performance in the presence of realistic powerline channel conditions. The development of a powerline communication system requires detailed knowledge of the electric
power grid channel properties, such as the frequency transfer function and the interference processes, in order to choose a suitable transmission method. The noise interference and channel multipath effects are the main impairments to the performance of PLC
systems. This thesis presents appropriate channel models for use in the design of PLC
systems. In particular, the Bit Error Rate (BER) performance of a single-carrier Binary Phase Shift Keying (BPSK) system operating over a multipath channel is analyzed and compared with the performance obtained with a multi-carrier data transmission scheme.
Advisors/Committee Members: Sagar, Nishant, 1986- (author), Daut, David G (chair), Orfanidis, Sophocles (internal member), Sannuti, Pedda (internal member).
Subjects/Keywords: Electric power systems—Communication systems; Electric power systems – Standards
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APA (6th Edition):
Sagar, Nishant, 1. (2011). Powerline communications systems: overview and analysis. (Masters Thesis). Rutgers University. Retrieved from http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000061509
Chicago Manual of Style (16th Edition):
Sagar, Nishant, 1986-. “Powerline communications systems: overview and analysis.” 2011. Masters Thesis, Rutgers University. Accessed December 16, 2019.
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000061509.
MLA Handbook (7th Edition):
Sagar, Nishant, 1986-. “Powerline communications systems: overview and analysis.” 2011. Web. 16 Dec 2019.
Vancouver:
Sagar, Nishant 1. Powerline communications systems: overview and analysis. [Internet] [Masters thesis]. Rutgers University; 2011. [cited 2019 Dec 16].
Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000061509.
Council of Science Editors:
Sagar, Nishant 1. Powerline communications systems: overview and analysis. [Masters Thesis]. Rutgers University; 2011. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000061509
University of Limerick
9.
Effler, Simon.
Enhancing digital control for DC/DC converters.
Degree: 2010, University of Limerick
URL: http://hdl.handle.net/10344/5820
► peer-reviewed
The continuing trend in switched-mode power supplies clearly leads to the delivery of more output power with an ever increasing number of voltages more…
(more)
▼ peer-reviewed
The continuing trend in switched-mode power supplies clearly leads to the
delivery of more output power with an ever increasing number of voltages
more efficiently at less cost. Increasing power management requirements, i.e.
communication functionalities, contribute significantly to the need for digitally
controlled power supplies.
While most of these designs still use simple PID compensators, the introduction
of more advanced compensation techniques will improve the system performance
considerably. However, one reason for the slow adoption of digital power
converters is the lack of proper design tools for advanced digital controllers.
This issue is addressed in this thesis where an automated design procedure
based on Generalized Predictive Control (GPC) has been developed. Reallife
design criteria are used to optimize compensators for application-specific
requirements without the need for extensive control expertise.
Another issue in today’s digital power systems is the choice of system architecture.
Two different concepts are widely used. For high output power demands
and fast transient response, multi-phase converters are used which modulate a
number of parallel power converters (phases). In this thesis, a new modulator
concept is proposed which enables the use of efficiency-improving techniques
without increasing the design complexity. The proposed modulator features
an internal duty cycle redistribution without complex management overhead.
With this modulator, phase shedding can be accommodated together with
improved transient behaviour.
An alternative concept commonly used today is an intermediate bus architecture
with multiple separate point-of-load converters; each controlled by
its individual digital core. Digital communication signals between the converters
are required to implement advanced control features, such as phase
shedding or current sharing. In this thesis, new techniques are proposed which
enable the use of these advanced control features without the need for digital
communication signals. Firstly, a new algorithm for phase alignment and
frequency synchronization between the individual converters is detailed which
uses the perturbance generated by the individual power supplies on the input
voltage. Secondly, a novel current distribution principle based on smart power
converters is presented. It enables the distribution of the output current over
the individual power converters to optimize overall efficiency. Each converter
optimizes its output current based on predefined optimal currents without
requiring information about the total output current.
Advisors/Committee Members: Rinne, Karl, Halton, Mark, IRC.
Subjects/Keywords: digital power systems; output power; communication signals
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APA (6th Edition):
Effler, S. (2010). Enhancing digital control for DC/DC converters. (Thesis). University of Limerick. Retrieved from http://hdl.handle.net/10344/5820
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):
Effler, Simon. “Enhancing digital control for DC/DC converters.” 2010. Thesis, University of Limerick. Accessed December 16, 2019.
http://hdl.handle.net/10344/5820.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Effler, Simon. “Enhancing digital control for DC/DC converters.” 2010. Web. 16 Dec 2019.
Vancouver:
Effler S. Enhancing digital control for DC/DC converters. [Internet] [Thesis]. University of Limerick; 2010. [cited 2019 Dec 16].
Available from: http://hdl.handle.net/10344/5820.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Effler S. Enhancing digital control for DC/DC converters. [Thesis]. University of Limerick; 2010. Available from: http://hdl.handle.net/10344/5820
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
10.
Salah Aldeen Mohamed Zeyada, Mosab.
Adaptive underfrequency load shedding based on real time simulation.
Degree: 2014, University of Tennessee – Chattanooga
URL: https://scholar.utc.edu/theses/154
► Conventional Underfrequency Load Shedding (UFLS) is used to balance generation and load when underfrequency conditions occur. It sheds a fixed, predetermined amount of load irrespective…
(more)
▼ Conventional Underfrequency Load Shedding (UFLS) is used to balance generation and load when underfrequency conditions occur. It sheds a fixed, predetermined amount of load irrespective of disturbance location. Several adaptive UFLS schemes are proposed in the literature. Recent research discussed utilizing synchrophasor messages to implement adaptive UFLS but these studies have been using virtual PMUs. Of late, hardware implementations for adaptive UFLS scheme using actual Phasor Measurement Units (PMUs) are reported but also these studies are based on small
power systems. This study presents hardware implementation of adaptive UFLS based on real time simulation of IEEE39-bus system.
The simulation tool used was OPAL-RT eMEGAsim real time digital simulator. To emulate the actual environment where the scheme could be used, a complete phasor network setup is established using actual devices, such as high accuracy Global Positioning System (GPS) clocks, PMUs and Synchrophasor Vector Processor (SVP).
The results obtained show that the adaptive UFLS scheme restored the frequency and curtailed the load based on voltage sag. Furthermore, the results are compared with conventional UFLS scheme.
Advisors/Committee Members: Eltom, Ahmed H., Ofoli, Abdul, Kobet, Gary, College of Engineering and Computer Science.
Subjects/Keywords: Electric power distribution; Electric power systems
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APA (6th Edition):
Salah Aldeen Mohamed Zeyada, M. (2014). Adaptive underfrequency load shedding based on real time simulation. (Masters Thesis). University of Tennessee – Chattanooga. Retrieved from https://scholar.utc.edu/theses/154
Chicago Manual of Style (16th Edition):
Salah Aldeen Mohamed Zeyada, Mosab. “Adaptive underfrequency load shedding based on real time simulation.” 2014. Masters Thesis, University of Tennessee – Chattanooga. Accessed December 16, 2019.
https://scholar.utc.edu/theses/154.
MLA Handbook (7th Edition):
Salah Aldeen Mohamed Zeyada, Mosab. “Adaptive underfrequency load shedding based on real time simulation.” 2014. Web. 16 Dec 2019.
Vancouver:
Salah Aldeen Mohamed Zeyada M. Adaptive underfrequency load shedding based on real time simulation. [Internet] [Masters thesis]. University of Tennessee – Chattanooga; 2014. [cited 2019 Dec 16].
Available from: https://scholar.utc.edu/theses/154.
Council of Science Editors:
Salah Aldeen Mohamed Zeyada M. Adaptive underfrequency load shedding based on real time simulation. [Masters Thesis]. University of Tennessee – Chattanooga; 2014. Available from: https://scholar.utc.edu/theses/154
11.
Abd Elwahid, Sarra.
Hardware implementation of an automatic adaptive centralized under frequency load shedding.
Degree: 2013, University of Tennessee – Chattanooga
URL: https://scholar.utc.edu/theses/186
► Due to the shortcomings of the conventional Under Frequency Load Shedding UFLS, most researches develop an adaptive UFLS schemes. With the aid of new technology…
(more)
▼ Due to the shortcomings of the conventional Under Frequency Load Shedding UFLS, most researches develop an adaptive UFLS schemes. With the aid of new technology hardware that enables the implementation of Wide Area Monitoring Protection and Control (WAMPC)
application, this gives the opportunity for using industrial grade hardware to implement, evaluate these schemes and, therefore, to validate the recent research findings for industrial use.
This study implements a centralized adaptive UFLS algorithm using industry grade hardware such as Phasor Measurement Units (PMUs), Synchrophasor Vector Processor (SVP) that resembles real time system operation.
The study examines disturbance effects on the frequency at different disturbance
locations. Each time the algorithm decisions are able to restore system frequency to a safe level and improve voltage level at the load buses. Besides, the algorithm is able to distribute the amount of
power to be shed differently with the disturbance locations.
Advisors/Committee Members: Eltom, Ahmed H., Kobet, Gary, Ofoli, Abdul, College of Engineering and Computer Science.
Subjects/Keywords: Electric power systems; Electric power distribution
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APA (6th Edition):
Abd Elwahid, S. (2013). Hardware implementation of an automatic adaptive centralized under frequency load shedding. (Masters Thesis). University of Tennessee – Chattanooga. Retrieved from https://scholar.utc.edu/theses/186
Chicago Manual of Style (16th Edition):
Abd Elwahid, Sarra. “Hardware implementation of an automatic adaptive centralized under frequency load shedding.” 2013. Masters Thesis, University of Tennessee – Chattanooga. Accessed December 16, 2019.
https://scholar.utc.edu/theses/186.
MLA Handbook (7th Edition):
Abd Elwahid, Sarra. “Hardware implementation of an automatic adaptive centralized under frequency load shedding.” 2013. Web. 16 Dec 2019.
Vancouver:
Abd Elwahid S. Hardware implementation of an automatic adaptive centralized under frequency load shedding. [Internet] [Masters thesis]. University of Tennessee – Chattanooga; 2013. [cited 2019 Dec 16].
Available from: https://scholar.utc.edu/theses/186.
Council of Science Editors:
Abd Elwahid S. Hardware implementation of an automatic adaptive centralized under frequency load shedding. [Masters Thesis]. University of Tennessee – Chattanooga; 2013. Available from: https://scholar.utc.edu/theses/186
12.
Goff, Cassandra Ha.
Fast bus protection using iec 61850.
Degree: 2013, University of Tennessee – Chattanooga
URL: https://scholar.utc.edu/theses/277
► International Electrotechnical Commission (IEC) 61850 is the latest technology that allows electric power utilities to build low cost digital substations. Because limited objective information is…
(more)
▼ International Electrotechnical Commission (IEC) 61850 is the latest technology that
allows electric
power utilities to build low cost
digital substations.
Because limited objective
information is available, electric
power utilities desire independent evaluations of IEC 61850
from end users.
The objective of this study was to compare the IEC 61850 method to the hardwired
method to find an optimal solution for the fast
bus protection scheme.
System disturbance
clearing time, engineering and construction costs, and interoperability between multivendor
microprocessor-based relays were used
as the criteria for the evaluation.
This research measured the protection speed of the hardwired method and the IEC 61850
method for the fast bus protection scheme, utilizing relays from the same and mixed
manufacturers. The results of the study show
that IEC 61850 method is simple, cost effective,
and offers speed of operation comparable to the hardwired method.
Advisors/Committee Members: Eltom, Ahmed H., Craven, Stephen D., Ofoli, Abdul, R., Kobet, Gary L., College of Engineering and Computer Science.
Subjects/Keywords: Electric power systems; Electric power distribution
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APA (6th Edition):
Goff, C. H. (2013). Fast bus protection using iec 61850. (Masters Thesis). University of Tennessee – Chattanooga. Retrieved from https://scholar.utc.edu/theses/277
Chicago Manual of Style (16th Edition):
Goff, Cassandra Ha. “Fast bus protection using iec 61850.” 2013. Masters Thesis, University of Tennessee – Chattanooga. Accessed December 16, 2019.
https://scholar.utc.edu/theses/277.
MLA Handbook (7th Edition):
Goff, Cassandra Ha. “Fast bus protection using iec 61850.” 2013. Web. 16 Dec 2019.
Vancouver:
Goff CH. Fast bus protection using iec 61850. [Internet] [Masters thesis]. University of Tennessee – Chattanooga; 2013. [cited 2019 Dec 16].
Available from: https://scholar.utc.edu/theses/277.
Council of Science Editors:
Goff CH. Fast bus protection using iec 61850. [Masters Thesis]. University of Tennessee – Chattanooga; 2013. Available from: https://scholar.utc.edu/theses/277
13.
Manandhar, Sudip.
Reliability assessment of smart distribution system and analysis of automatic line switches.
Degree: 2013, University of Tennessee – Chattanooga
URL: https://scholar.utc.edu/theses/331
► Electric Power reliability is a major concern of any utility company. Although the distribution system is getting advanced, reliable energy at a cheaper cost is…
(more)
▼ Electric
Power reliability is a major concern of any utility company. Although the
distribution system is getting advanced, reliable energy at a cheaper cost is still a big concern.
Power utility companies are trying to provide reliable energy through many
possible ways. One
of the possible solutions is use of automatic switches.
Power utility companies are using automatic switch called IntelliRupter®
for automatic
fault detection, isolation and service restoration. It has been the biggest achievement in
improving reliability so far. However, such automation is very costly. It needs proper planning
for installation of such devices so that the utility company can make the most benefit at optimal
cost.
The main objective of the study is to compute reliability of the distribution system using
Failure Mode and Effect Analysis method. Also, it presents step by step economic analysis to
determine optimum number and location of automatic switch fulfilling reliability and economic
constraints.
Advisors/Committee Members: Sisworahardjo, Nurhidajat, Eltom, Ahmed H., Ofoli, Abjul, College of Engineering and Computer Science.
Subjects/Keywords: Electric power systems; Electric power distribution
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APA (6th Edition):
Manandhar, S. (2013). Reliability assessment of smart distribution system and analysis of automatic line switches. (Masters Thesis). University of Tennessee – Chattanooga. Retrieved from https://scholar.utc.edu/theses/331
Chicago Manual of Style (16th Edition):
Manandhar, Sudip. “Reliability assessment of smart distribution system and analysis of automatic line switches.” 2013. Masters Thesis, University of Tennessee – Chattanooga. Accessed December 16, 2019.
https://scholar.utc.edu/theses/331.
MLA Handbook (7th Edition):
Manandhar, Sudip. “Reliability assessment of smart distribution system and analysis of automatic line switches.” 2013. Web. 16 Dec 2019.
Vancouver:
Manandhar S. Reliability assessment of smart distribution system and analysis of automatic line switches. [Internet] [Masters thesis]. University of Tennessee – Chattanooga; 2013. [cited 2019 Dec 16].
Available from: https://scholar.utc.edu/theses/331.
Council of Science Editors:
Manandhar S. Reliability assessment of smart distribution system and analysis of automatic line switches. [Masters Thesis]. University of Tennessee – Chattanooga; 2013. Available from: https://scholar.utc.edu/theses/331
14.
Patterson, Russell William.
Analysis of two-stage shunt capacitor bank protection deficiencies with mitigation suggested.
Degree: 2013, University of Tennessee – Chattanooga
URL: https://scholar.utc.edu/theses/360
► A large utility was experiencing a problem when switching a two-stage capacitor bank resulting in misoperations of the bank protection. When the bypass switch is…
(more)
▼ A large
utility was experiencing a problem
when
switching
a
two-stage capacitor
bank
resulting
in misoperations of the bank protection. When the bypass switch is
opened a long duration dc offset occurs across all capacitors. This dc causes saturation of
the tap point VT resulting in a false differential voltage and misoperation of the
protection. The utility had to
disable
the
voltage differential
during switching until the
phenomenon could be studied and a suitable solution found.
The work is a comprehensive analysis
of the
transients
affecting the protection
and how the problem could be mitigated.
An analytical approach was taken to
understand the
occurrence of
the dc offset
and
an
Electromagnetics Transients Program (EMTP)
was used to study various
mitigation techniques.
A
simple solution
is presented for future
installations that
prevents
the problem completely. A “next best” mitigation
is presented for existing
banks
where
reconfiguration would not be cost justified.
Advisors/Committee Members: Eltom, Ahmed H., Sisworahardjo, Nurhidajat, Kobet, Gary L., College of Engineering and Computer Science.
Subjects/Keywords: Electric power systems; Electric power distribution
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Manager
APA (6th Edition):
Patterson, R. W. (2013). Analysis of two-stage shunt capacitor bank protection deficiencies with mitigation suggested. (Masters Thesis). University of Tennessee – Chattanooga. Retrieved from https://scholar.utc.edu/theses/360
Chicago Manual of Style (16th Edition):
Patterson, Russell William. “Analysis of two-stage shunt capacitor bank protection deficiencies with mitigation suggested.” 2013. Masters Thesis, University of Tennessee – Chattanooga. Accessed December 16, 2019.
https://scholar.utc.edu/theses/360.
MLA Handbook (7th Edition):
Patterson, Russell William. “Analysis of two-stage shunt capacitor bank protection deficiencies with mitigation suggested.” 2013. Web. 16 Dec 2019.
Vancouver:
Patterson RW. Analysis of two-stage shunt capacitor bank protection deficiencies with mitigation suggested. [Internet] [Masters thesis]. University of Tennessee – Chattanooga; 2013. [cited 2019 Dec 16].
Available from: https://scholar.utc.edu/theses/360.
Council of Science Editors:
Patterson RW. Analysis of two-stage shunt capacitor bank protection deficiencies with mitigation suggested. [Masters Thesis]. University of Tennessee – Chattanooga; 2013. Available from: https://scholar.utc.edu/theses/360
15.
Mohammed, Enass.
Investigation of a new method for synchronous generator loss of excitation protection.
Degree: 2017, University of Tennessee – Chattanooga
URL: https://scholar.utc.edu/theses/520
► ABSTRACT Synchronous generator loss of field can compromise both generator and power grid stability and therefore must be quickly detected. In this thesis, a new…
(more)
▼ ABSTRACT
Synchronous generator loss of field can compromise both generator and
power grid stability and therefore must be quickly detected.
In this thesis, a new proposed method for LOF detection has been further explored and its shortcomings corrected.The detection index has been calculated based on these new modifications. The modifications include a more robust delta estimation technique and a removal of a required algorithm condition. Two methods are used to estimate the rotor angle and bothprovide a similar estimation. The first method depends on the integration of the rotor speed over time, while the second method is based on equations presented in a published paper.
Moreover, the algorithm was tested on both a 2-bus system and the IEEE 9-bus system to investigate the detection time, security and reliability of the proposed method.
The simulation model wasbuiltusing a Real Time Digital Simulator (RTDS) to simulate generator loss of excitation on a 2-bus and 9-bus system. The algorithm was then tested under various operating conditions (normal system conditions and disturbances). The advantages and drawbacks of the proposed algorithm are discussed in the thesis.
Advisors/Committee Members: Eltom, Ahmed H., Karrar, Abdelrahman A., Kobet, Gary L., College of Engineering and Computer Science.
Subjects/Keywords: Electric power systems; Electric power system stability
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APA (6th Edition):
Mohammed, E. (2017). Investigation of a new method for synchronous generator loss of excitation protection. (Masters Thesis). University of Tennessee – Chattanooga. Retrieved from https://scholar.utc.edu/theses/520
Chicago Manual of Style (16th Edition):
Mohammed, Enass. “Investigation of a new method for synchronous generator loss of excitation protection.” 2017. Masters Thesis, University of Tennessee – Chattanooga. Accessed December 16, 2019.
https://scholar.utc.edu/theses/520.
MLA Handbook (7th Edition):
Mohammed, Enass. “Investigation of a new method for synchronous generator loss of excitation protection.” 2017. Web. 16 Dec 2019.
Vancouver:
Mohammed E. Investigation of a new method for synchronous generator loss of excitation protection. [Internet] [Masters thesis]. University of Tennessee – Chattanooga; 2017. [cited 2019 Dec 16].
Available from: https://scholar.utc.edu/theses/520.
Council of Science Editors:
Mohammed E. Investigation of a new method for synchronous generator loss of excitation protection. [Masters Thesis]. University of Tennessee – Chattanooga; 2017. Available from: https://scholar.utc.edu/theses/520
University of Victoria
16.
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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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 December 16, 2019.
http://hdl.handle.net/1828/3618.
MLA Handbook (7th Edition):
Gassner, Andy. “Sizing storage and wind generation capacities in remote power systems.” 2011. Web. 16 Dec 2019.
Vancouver:
Gassner A. Sizing storage and wind generation capacities in remote power systems. [Internet] [Masters thesis]. University of Victoria; 2011. [cited 2019 Dec 16].
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
Louisiana State University
17.
Boudreaux, John Albert.
Design, Simulation, and Construction of an IEEE 14-Bus Power System.
Degree: MSEE, Power and Energy, 2018, Louisiana State University
URL: https://digitalcommons.lsu.edu/gradschool_theses/4801
► Today’s bulk power system is massive, complex, and very dynamic. The U.S. power grid spans from coast to coast and even as far reaching…
(more)
▼ Today’s bulk power system is massive, complex, and very dynamic. The U.S. power grid spans from coast to coast and even as far reaching as Canada. With the addition of new technologies such as renewable energies and power electronics to aid in power conversion and control, the power system grows more complex by the day. The most common approach of analyzing power system stability is through computer modeling and simulation. Due to the vast size and inaccessibility of transmission systems, real time testing can prove difficult. The motivation of this project was to design, simulate, and construct an IEEE 14 bus power system for future use in a lab setting to test, in real time, novel control techniques for various forms of generation and their impacts on the stability of the grid. This thesis presents the theory used to design and construct an IEEE 14-bus power system. A comparison of results from modeling and simulation with actual lab data obtained from the constructed test set up.
Subjects/Keywords: Power Systems; Electrical Engineering; Electric Power
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APA (6th Edition):
Boudreaux, J. A. (2018). Design, Simulation, and Construction of an IEEE 14-Bus Power System. (Masters Thesis). Louisiana State University. Retrieved from https://digitalcommons.lsu.edu/gradschool_theses/4801
Chicago Manual of Style (16th Edition):
Boudreaux, John Albert. “Design, Simulation, and Construction of an IEEE 14-Bus Power System.” 2018. Masters Thesis, Louisiana State University. Accessed December 16, 2019.
https://digitalcommons.lsu.edu/gradschool_theses/4801.
MLA Handbook (7th Edition):
Boudreaux, John Albert. “Design, Simulation, and Construction of an IEEE 14-Bus Power System.” 2018. Web. 16 Dec 2019.
Vancouver:
Boudreaux JA. Design, Simulation, and Construction of an IEEE 14-Bus Power System. [Internet] [Masters thesis]. Louisiana State University; 2018. [cited 2019 Dec 16].
Available from: https://digitalcommons.lsu.edu/gradschool_theses/4801.
Council of Science Editors:
Boudreaux JA. Design, Simulation, and Construction of an IEEE 14-Bus Power System. [Masters Thesis]. Louisiana State University; 2018. Available from: https://digitalcommons.lsu.edu/gradschool_theses/4801
18.
Alverson, Mugdha.
Relay coordination with multiple breaker-in/breaker-out stations on the transmission line.
Degree: 2019, University of Tennessee – Chattanooga
URL: https://scholar.utc.edu/theses/592
► The main purpose of power system protection is to remove faults from the system as soon as possible so minimum damage happens to the transmission…
(more)
▼ The main purpose of
power system protection is to remove faults from the system as soon as possible so minimum damage happens to the transmission line or other equipment connected to the line. Tennessee Valley Authority (TVA) planners want to add multiple breaker-in/breaker-out stations on a two terminal transmission lines to reduce the number of Customer Connection Point Interruption (CCPI). This paper discusses the difficulty of setting up the zone distance relays and overcurrent relays when multiple breaker-in/breaker-out stations are added on the transmission line. It explains how many breakers can safely be added without compromising the zone 2 time delay of 50 cycles (limit imposed by TVA), how to set distance relay for phase faults and instantaneous overcurrent as well as time overcurrent relay for ground fault. It makes recommendation for not placing the breaker-in/breaker-out stations at a certain distance on transmission line and also talks about the maximum line loadability according to NERC standard PRC-023 when zone 2 of the distance element is set higher than 130%.
Advisors/Committee Members: Kobet, Gary L., Eltom, Ahmed H., Karrar, Abdelrahman, College of Engineering and Computer Science.
Subjects/Keywords: Electric power systems; Electric power distribution
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APA (6th Edition):
Alverson, M. (2019). Relay coordination with multiple breaker-in/breaker-out stations on the transmission line. (Masters Thesis). University of Tennessee – Chattanooga. Retrieved from https://scholar.utc.edu/theses/592
Chicago Manual of Style (16th Edition):
Alverson, Mugdha. “Relay coordination with multiple breaker-in/breaker-out stations on the transmission line.” 2019. Masters Thesis, University of Tennessee – Chattanooga. Accessed December 16, 2019.
https://scholar.utc.edu/theses/592.
MLA Handbook (7th Edition):
Alverson, Mugdha. “Relay coordination with multiple breaker-in/breaker-out stations on the transmission line.” 2019. Web. 16 Dec 2019.
Vancouver:
Alverson M. Relay coordination with multiple breaker-in/breaker-out stations on the transmission line. [Internet] [Masters thesis]. University of Tennessee – Chattanooga; 2019. [cited 2019 Dec 16].
Available from: https://scholar.utc.edu/theses/592.
Council of Science Editors:
Alverson M. Relay coordination with multiple breaker-in/breaker-out stations on the transmission line. [Masters Thesis]. University of Tennessee – Chattanooga; 2019. Available from: https://scholar.utc.edu/theses/592
19.
Lautigar, Mitch.
Automated transmission line fault analysis the SMT method.
Degree: 2019, University of Tennessee – Chattanooga
URL: https://scholar.utc.edu/theses/600
► Analyzing faults from transmission lines automatically using a computer is a complex, multi-step process that takes a literal understanding of how the computer reads the…
(more)
▼ Analyzing faults from transmission lines automatically using a computer is a complex, multi-step process that takes a literal understanding of how the computer reads the data. While there are many ways to approach this problem (e.g.. Inductance Calculation), the Square Mean Test method allows for quick, and efficient calculations of any files read in from Intelliruptors. These calculations are then grouped and classified together outside of this project to prioritize faults that need to be looked at.
Advisors/Committee Members: Karrar, Abdelrahman, Ahmed, Raga, Ofoli, Abdul R., Hay, Robert, College of Engineering and Computer Science.
Subjects/Keywords: Electric power systems; Electric power distribution
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to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lautigar, M. (2019). Automated transmission line fault analysis the SMT method. (Masters Thesis). University of Tennessee – Chattanooga. Retrieved from https://scholar.utc.edu/theses/600
Chicago Manual of Style (16th Edition):
Lautigar, Mitch. “Automated transmission line fault analysis the SMT method.” 2019. Masters Thesis, University of Tennessee – Chattanooga. Accessed December 16, 2019.
https://scholar.utc.edu/theses/600.
MLA Handbook (7th Edition):
Lautigar, Mitch. “Automated transmission line fault analysis the SMT method.” 2019. Web. 16 Dec 2019.
Vancouver:
Lautigar M. Automated transmission line fault analysis the SMT method. [Internet] [Masters thesis]. University of Tennessee – Chattanooga; 2019. [cited 2019 Dec 16].
Available from: https://scholar.utc.edu/theses/600.
Council of Science Editors:
Lautigar M. Automated transmission line fault analysis the SMT method. [Masters Thesis]. University of Tennessee – Chattanooga; 2019. Available from: https://scholar.utc.edu/theses/600
University of New South Wales
20.
Zhang, Ying.
The secret life of ERP: from technical tool, instrument of control, to transformative agent.
Degree: Information Systems, Technology & Management, 2011, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/51420
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:10104/SOURCE02?view=true
► In the Information Systems (IS) discipline there has been a continued interest in understanding how IT or IS development, implementation and use draw from and…
(more)
▼ In the Information
Systems (IS) discipline there has been a continued interest in understanding how IT or IS development, implementation and use draw from and impact on social and
power relations and the distribution of
power in various contexts. This thesis aims to understand the role that the implementation and use of an enterprise system such as ERP can play in the (re)configuration, (re)construction and exercise of
power in organisational contexts. To achieve the aim, the thesis i) draws from extensive literature related to IS (and specifically ERP) and
power, ii) develops a Foucauldian theoretical foundation to study ERP and
power in organisational contexts and iii) examines a case of an ERP implementation and use in a State Owned Enterprise (SOE) in China as part of an ongoing modernization program. The thesis answers the following empirical research questions:1. How are various forms of exercise of
power and control enacted through the ERP system implementation and use in business processes and practices?2. How do these enactments reconfigure
power relations and reconstitute the regime of truth? 3. What is the role of the ERP system in such a process of
power (re)construction?The case study demonstrates how the ERP implementation aimed at rationalizing business processes led to largely covert attempts at increasing surveillance, standardization, disciplining, and subjugation. These attempts are met with counteraction in various forms through a ‘care of the self’, including overt resistance, e.g. openly challenging and arguing, non-participation, and covert resistance, e.g. distancing, persistence, creating workarounds. The analysis reveals the outcomes of the ERP implementation do not only result from the perception of technological (mis)fit or the interpretation by powerful groups but more importantly spring from mutual constitution of the ERP system and the human actors leading to reconfiguration of
power relations. This is explained by proposing a concept of
power-technology nexus as an instance of the broader notion of
power/knowledge discussed by Foucault. The emergence of
power-technology nexus indicates that the more ERP enabled processes get enacted, the more ERP becomes integral to the circulation and exercise of
power, and the more the ERP system becomes a material embodiment of the
power/knowledge nexus, thus a transformative agent. These empirical and theoretical results contribute not only to better understanding of the mutual reconstruction of
power and technology, but also provide a theoretical foundation for a more critical view of the wider societal and political consequences of technology that can help inform both research and practice.
Advisors/Committee Members: Cecez-Kecmanovic, Dubravka, Information Systems, Technology & Management, Australian School of Business, UNSW.
Subjects/Keywords: Power-technology nexus; ERP systems; Power relations
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APA (6th Edition):
Zhang, Y. (2011). The secret life of ERP: from technical tool, instrument of control, to transformative agent. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/51420 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:10104/SOURCE02?view=true
Chicago Manual of Style (16th Edition):
Zhang, Ying. “The secret life of ERP: from technical tool, instrument of control, to transformative agent.” 2011. Doctoral Dissertation, University of New South Wales. Accessed December 16, 2019.
http://handle.unsw.edu.au/1959.4/51420 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:10104/SOURCE02?view=true.
MLA Handbook (7th Edition):
Zhang, Ying. “The secret life of ERP: from technical tool, instrument of control, to transformative agent.” 2011. Web. 16 Dec 2019.
Vancouver:
Zhang Y. The secret life of ERP: from technical tool, instrument of control, to transformative agent. [Internet] [Doctoral dissertation]. University of New South Wales; 2011. [cited 2019 Dec 16].
Available from: http://handle.unsw.edu.au/1959.4/51420 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:10104/SOURCE02?view=true.
Council of Science Editors:
Zhang Y. The secret life of ERP: from technical tool, instrument of control, to transformative agent. [Doctoral Dissertation]. University of New South Wales; 2011. Available from: http://handle.unsw.edu.au/1959.4/51420 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:10104/SOURCE02?view=true
University of KwaZulu-Natal
21.
Naicker, Kubendran.
Application of distance protection for transformers in Eskom transmission.
Degree: Electric power and energy systems, 2014, University of KwaZulu-Natal
URL: http://hdl.handle.net/10413/12543
► Eskom is South Africa’s state owned utility who is responsible for the generation, transmission and distribution of electricity. The transmission network in Eskom consists of…
(more)
▼ Eskom is South Africa’s state owned utility who is responsible for the generation, transmission and distribution of electricity. The transmission network in Eskom consists of thousands of kilometres of lines operating at voltages from 220kV to 765kV. Three winding transformers, two winding transformers and autotransformers are employed in Eskom’s transmission network.
High Voltage (HV) Inverse Definite Minimum Time (IDMT) overcurrent protection and Medium Voltage (MV) IDMT overcurrent protection are employed to provide backup for these transformer’s differential protection and for uncleared through faults. Eskom’s Transmission setting philosophy states “that the HV and MV IDMT overcurrent elements must be stable at 2 x full load current of the transformer”. This has resulted in MV and HV over-current protection not detecting MV multiphase busbar faults in substations with low MV fault levels which are located far away from generating stations.
In such cases a possible solution is to use distance protection for transformers. This research study investigates how the different vector groups of the
power transformer affect the impedance measured by the protection relay, and how standard distance algorithms in protection relays respond to faults located on the MV side of the
power transformer. The study consists of a literature review of current practices of transformer distance protection.
Autotransformers and distance relays are discussed with manual fault calculation examples. The effects of tap-changers and transformer inrush current on transformer distance protection are also discussed. DigSilent
Power Factory software version 15.0.2 was used in the modelling and simulation of faults. The response of distance elements for various faults located on the MV side of transformers are analysed and summarised in two tables which indicate which loops will measure the precise distance to fault through the various transformers and which loops will measure the distance to fault with a slight error.
Multifunction Intelligent Electronic Devices (IEDs) with both distance and differential functions are now being commissioned in the Eskom transmission network for the protection of transformers. The distance elements employed in transformer IEDs are similar to distance elements found in a line distance relay. These distance functions can be set to provide local backup protection for uncleared HV and MV busbar faults in the Eskom Transmission network.
Advisors/Committee Members: Davidson, Innocent E (advisor), Perera, Anura (advisor).
Subjects/Keywords: Electric power and energy systems.
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APA (6th Edition):
Naicker, K. (2014). Application of distance protection for transformers in Eskom transmission. (Thesis). University of KwaZulu-Natal. Retrieved from http://hdl.handle.net/10413/12543
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):
Naicker, Kubendran. “Application of distance protection for transformers in Eskom transmission.” 2014. Thesis, University of KwaZulu-Natal. Accessed December 16, 2019.
http://hdl.handle.net/10413/12543.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Naicker, Kubendran. “Application of distance protection for transformers in Eskom transmission.” 2014. Web. 16 Dec 2019.
Vancouver:
Naicker K. Application of distance protection for transformers in Eskom transmission. [Internet] [Thesis]. University of KwaZulu-Natal; 2014. [cited 2019 Dec 16].
Available from: http://hdl.handle.net/10413/12543.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Naicker K. Application of distance protection for transformers in Eskom transmission. [Thesis]. University of KwaZulu-Natal; 2014. Available from: http://hdl.handle.net/10413/12543
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
22.
Abdelmoumene, Abdelkader.
Design and Implementation of a Reliable Digital Relay for Electrical Equipment.
Degree: 2015, Université M'Hamed Bougara Boumerdès
URL: http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/2187
► 87 p. : ill. ; 30 cm
While an electrical power system is one of the more complex and important systems ever built by human…
(more)
▼ 87 p. : ill. ; 30 cm
While an electrical power system is one of the more complex and important systems ever built by human civilization; the protection system is not less complexity. The situation is aggravated by the increasing complexity of protection schemes and the use of digital relays containing software for the management of the different operating conditions of power systems. Digital relays are a result of the application of microprocessor technology in the protection industry. These relays are in an extensive use in modern protection schemes and are also a very active area of research. A particular emphasis has been given to the development of algorithms that allow obtaining the most accurate decision in the fastest way. Besides, the low reliability level of digital relays is regarded as a dark point that hovers about them and considered as major worry stated by many specialists in the field of power system. The work reported in this thesis has made the following contributions :
-An exhausting review which resumes the main highlights in protective relay's developments and trends.
-An enhanced algorithm based on the theory of harmonic analysis to discriminate between the internal fault and the inrush current created during the switching of the power transformer. The simulation results of the proposed differential relay gave very satisfactory results in term of discrimination as well as in term of rapidity (operating time).
- A new algorithm for numerical overcurrent protection of induction motors. The effectiveness of our developed model was proven by comparing its behaviors versus different abnormal situations with various inverse time characteristics normalized by the IEC standard.
- A comprehensive analytical approach for assessing and improving the reliability of digital protective relay has been presented. After identifying the common cause failures; the fault Tree method has been used to analyze and quantify the failure rate, the reliability as well as the lifetime of DR. The results of the proposed methodology reveal that the failure rate is reduced by 25 %, the reliability is significantly improved and the lifetime is extended by more than 30 %
Subjects/Keywords: Reliability (Engineering); Power systems
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APA (6th Edition):
Abdelmoumene, A. (2015). Design and Implementation of a Reliable Digital Relay for Electrical Equipment. (Thesis). Université M'Hamed Bougara Boumerdès. Retrieved from http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/2187
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):
Abdelmoumene, Abdelkader. “Design and Implementation of a Reliable Digital Relay for Electrical Equipment.” 2015. Thesis, Université M'Hamed Bougara Boumerdès. Accessed December 16, 2019.
http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/2187.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Abdelmoumene, Abdelkader. “Design and Implementation of a Reliable Digital Relay for Electrical Equipment.” 2015. Web. 16 Dec 2019.
Vancouver:
Abdelmoumene A. Design and Implementation of a Reliable Digital Relay for Electrical Equipment. [Internet] [Thesis]. Université M'Hamed Bougara Boumerdès; 2015. [cited 2019 Dec 16].
Available from: http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/2187.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Abdelmoumene A. Design and Implementation of a Reliable Digital Relay for Electrical Equipment. [Thesis]. Université M'Hamed Bougara Boumerdès; 2015. Available from: http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/2187
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Pretoria
23.
De Lange, Ezzard.
The impact of
increased electricity prices on consumer demand.
Degree: Gordon Institute of Business
Science (GIBS), 2010, University of Pretoria
URL: http://hdl.handle.net/2263/23096
► The impact on demand resulting from an electricity price increase is unknown, Dekenah, Heunis, Gaunt and Cheek (2003). This study focused on large Eskom customers…
(more)
▼ The impact on demand resulting from an electricity price
increase is unknown, Dekenah, Heunis, Gaunt and Cheek (2003). This
study focused on large Eskom customers (industry and mining) and
the impact of increased electricity prices (Eskom Megaflex
Time-of-Use tariff) on their electricity demand is analysed. Since,
the impact of this can be only be realised in the long-run (> 5
years), this study made use of historical data. In particular, the
impact of the revised Megaflex tariff in 2002, which increased high
season (winter) peak active charges by approximately 40% against an
approximate reduction of 30% in the low season (winter) was
analysed. It was found that the price elasticity of large Eskom
customers is inelastic in the short-run (< 2 years) and elastic
in the long-run. This is particularly evident in the Manufacturing
sector. Furthermore, it was found that price is not the only input
cost in the short-run, but economic factors such as commodity
prices also influence consumption behaviour. This is particularly
evident in the Mining sector. It was also found that alternatives
(i.e. mandatory and voluntary load reduction programmes, etc.)
impact electricity load profiles. In conclusion, this study found
sufficient evidence in support of the research hypothesis.
Copyright
Advisors/Committee Members: Mr M Holland (advisor).
Subjects/Keywords: UCTD; Electronic
power systems
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Manager
APA (6th Edition):
De Lange, E. (2010). The impact of
increased electricity prices on consumer demand. (Masters Thesis). University of Pretoria. Retrieved from http://hdl.handle.net/2263/23096
Chicago Manual of Style (16th Edition):
De Lange, Ezzard. “The impact of
increased electricity prices on consumer demand.” 2010. Masters Thesis, University of Pretoria. Accessed December 16, 2019.
http://hdl.handle.net/2263/23096.
MLA Handbook (7th Edition):
De Lange, Ezzard. “The impact of
increased electricity prices on consumer demand.” 2010. Web. 16 Dec 2019.
Vancouver:
De Lange E. The impact of
increased electricity prices on consumer demand. [Internet] [Masters thesis]. University of Pretoria; 2010. [cited 2019 Dec 16].
Available from: http://hdl.handle.net/2263/23096.
Council of Science Editors:
De Lange E. The impact of
increased electricity prices on consumer demand. [Masters Thesis]. University of Pretoria; 2010. Available from: http://hdl.handle.net/2263/23096
24.
Suresh Kumar T.
Realibility analysis of composite power systems using
facts controllers.
Degree: Electrical Engineering, 2013, Jawaharlal Nehru Technological University, Anantapuram
URL: http://shodhganga.inflibnet.ac.in/handle/10603/12389
► FACTS technologies can have major positive impacts on power system reliability performance and the actual benefits obtained can be assessed using suitable models and practice.…
(more)
▼ FACTS technologies can have major positive impacts
on power system reliability performance and the actual benefits
obtained can be assessed using suitable models and practice.
Emerging techniques for composite power system reliability
evaluation mainly focus on conventional generation and transmission
facilities. In this thesis, the impact of FACTS controllers on
Composite Power System Reliability on RBTS is examined by
incorporating the controller devices. FACTS controllers are used
for natural sharing of power where as series compensator is used
for reducing the effect of inductance. Addition of capacitance in
series with the transmission line modifies the reactance of line.
Number of TCSC s and UPFC s are connected in series (which is a
multi module), to determine the individual reliability. This can be
done by using state space representation or series-parallel system
configuration using network reduction technique. Reliability
analysis of the entire transmission system is being carried out by
using load indices like loss of load expectation (LOLE) and loss of
energy expectation (LOEE). A comparison has been carried out
between the FACTS controllers (UPFC and TCSC); the results show a
major improvement in the system reliability when using UPFC and
series compensator. Software has been developed to determine the
load indices and the limiting state probabilities using MATLAB / C.
newlineA novel approach of composite power system has been
presented by incorporating FACTS controllers in the RBTS system in
all the transmission lines for determining the system reliability.
Multi module FACTS controllers are also incorporated newlinein the
system to determine the reliability of the system by using state
space representation or series parallel representation using
network reduction technique. Investigation results show a
significant improvement in the Load point, system indices,
probability of failure and EENS when utilizing UPFC rather than
TCSC in all transmission lines and generation capacity while
comparing the FACTS devices.
Conclusion p. 164-166, References p. 167-177,
Appendixes p. 178-180
Advisors/Committee Members: Sankar V.
Subjects/Keywords: Electrical Engineering; Composite power systems
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Manager
APA (6th Edition):
T, S. K. (2013). Realibility analysis of composite power systems using
facts controllers. (Thesis). Jawaharlal Nehru Technological University, Anantapuram. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/12389
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):
T, Suresh Kumar. “Realibility analysis of composite power systems using
facts controllers.” 2013. Thesis, Jawaharlal Nehru Technological University, Anantapuram. Accessed December 16, 2019.
http://shodhganga.inflibnet.ac.in/handle/10603/12389.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
T, Suresh Kumar. “Realibility analysis of composite power systems using
facts controllers.” 2013. Web. 16 Dec 2019.
Vancouver:
T SK. Realibility analysis of composite power systems using
facts controllers. [Internet] [Thesis]. Jawaharlal Nehru Technological University, Anantapuram; 2013. [cited 2019 Dec 16].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/12389.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
T SK. Realibility analysis of composite power systems using
facts controllers. [Thesis]. Jawaharlal Nehru Technological University, Anantapuram; 2013. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/12389
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
25.
Chava, Sunil Kumar.
Transmission loading relief in deregulated power
systems; -.
Degree: Electrical and Electronic Engineering, 2013, Jawaharlal Nehru Technological University, Hyderabad
URL: http://shodhganga.inflibnet.ac.in/handle/10603/17295
► In this thesis, important factors that may affect generating newlinecompanies profit margins through wholesale electricity trading are newlinediscussed. These factors include generators capabilities, types of…
(more)
▼ In this thesis, important factors that may affect
generating newlinecompanies profit margins through wholesale
electricity trading are newlinediscussed. These factors include
generators capabilities, types of newlinegenerators owned, fuel
costs, transmission losses and settling price newlinevariation. It
demonstrates how proper analysis of these factors using newlinethe
solutions of Optimal Power Flow (OPF), can allow companies to
newlinemaximize overall revenue. Through this OPF analysis,
companies will newlinebe able to determine, for example, which
generators are most newlineeconomical to run, best locations for
generators to be situated at, and newlinealso the scheduling of
generators as demand changes throughout the day and season. It
illustrates how solutions of OPF can be used to maximize companies
revenue under different scenarios.
References p. 193-203 Appendix p.
204-278
Advisors/Committee Members: Subramanyam, P S.
Subjects/Keywords: Transmission; Deregulated; Power systems
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APA (6th Edition):
Chava, S. K. (2013). Transmission loading relief in deregulated power
systems; -. (Thesis). Jawaharlal Nehru Technological University, Hyderabad. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/17295
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):
Chava, Sunil Kumar. “Transmission loading relief in deregulated power
systems; -.” 2013. Thesis, Jawaharlal Nehru Technological University, Hyderabad. Accessed December 16, 2019.
http://shodhganga.inflibnet.ac.in/handle/10603/17295.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chava, Sunil Kumar. “Transmission loading relief in deregulated power
systems; -.” 2013. Web. 16 Dec 2019.
Vancouver:
Chava SK. Transmission loading relief in deregulated power
systems; -. [Internet] [Thesis]. Jawaharlal Nehru Technological University, Hyderabad; 2013. [cited 2019 Dec 16].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/17295.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chava SK. Transmission loading relief in deregulated power
systems; -. [Thesis]. Jawaharlal Nehru Technological University, Hyderabad; 2013. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/17295
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
26.
Sutha S.
Application of computational Intelligent techniques for
solving Power systems security problems;.
Degree: Application of computational Intelligent techniques
for solving Power systems security problems, 2014, Anna University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/26549
► The growth of large interconnected power systems demands a high newlinedegree of security for normal operation Consequently the burden of the newlinesystem operators has increased…
(more)
▼ The growth of large interconnected power systems
demands a high newlinedegree of security for normal operation
Consequently the burden of the newlinesystem operators has
increased tremendously Their effort is to ensure that all
newlinethe customers are satisfied with good quality of electric
power supplied all the newlinetime Therefore it becomes a necessity
to develop methods for a quick newlinesecurity evaluation of power
system performance using real time data In fact newlinethe operator
will be able to detect system conditions which may lead to
newlinepossible failure or deterioration of the quality of power
supply before the newlineoccurrence of such conditions The
evaluation forewarns the operators that the newlinesystem is not in
secure operating conditions and appropriate precautions and newline
or remedial actions must be taken quickly newline
newline
appendix p169-187, reference
p188-197.
Advisors/Committee Members: Kamaraj N.
Subjects/Keywords: Electrical Engineering; Power systems security
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APA ·
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MLA ·
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
S, S. (2014). Application of computational Intelligent techniques for
solving Power systems security problems;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/26549
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, Sutha. “Application of computational Intelligent techniques for
solving Power systems security problems;.” 2014. Thesis, Anna University. Accessed December 16, 2019.
http://shodhganga.inflibnet.ac.in/handle/10603/26549.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
S, Sutha. “Application of computational Intelligent techniques for
solving Power systems security problems;.” 2014. Web. 16 Dec 2019.
Vancouver:
S S. Application of computational Intelligent techniques for
solving Power systems security problems;. [Internet] [Thesis]. Anna University; 2014. [cited 2019 Dec 16].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/26549.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
S S. Application of computational Intelligent techniques for
solving Power systems security problems;. [Thesis]. Anna University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/26549
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Technology, Sydney
27.
Hart, AC.
Power-relations and information systems development.
Degree: 2014, University of Technology, Sydney
URL: http://hdl.handle.net/10453/30347
► Problems of communication in the interplay between the information systems professional and their clients have resulted in a preponderance of methods and frameworks of structured…
(more)
▼ Problems of communication in the interplay between the information systems professional and their clients have resulted in a preponderance of methods and frameworks of structured interaction that have failed to produce consistently successful outcomes, and in the author’s professional experience are ignored as impractical to confront the chaos of the day to day micro level that shape outcomes. What seems to be more germane to understand in the problem of communication is the relations of power between participants. And, if we accept that perspective of power as a relation that is important to understand in analysing the problem of communication, we must necessarily choose to delve further than the mainstream IS literature where the power of A over B, or the power of A to enable B dominates, because such trajectories ignore three important aspects. Firstly, the entanglement of these IS researchers and authors themselves in a relation of power with power as an object which is itself party to rhetoric that seems to be concerned with ethical or partisan debate (cf. Lucas, 1984; Stahl, 2008, Rowlands and Kautz, 2013). Secondly, in treating power as an object, the network of possible complex relations where power could be said to happen is bypassed in favour of a simpler actor-centric model. Thirdly, and most importantly for this research, is the possibility that power must necessarily not only occur in the skills and techniques of the information systems professional (techne) but also in the interplay of knowledges (episteme) that are deployed at the times of communication with their embedded rationalities (cf. Bjorn-Andersen and Eason, 1980; Law, 1991; and Baunsgaard and Clegg 2013). Broadly speaking for us, power-relations are deployed in the potential interplay between discourses, where discourse defines the boundaries of potentially competing, simultaneously operating and conflicted epistemologies.
In order to accommodate these points, we determined to conduct an interpretative epistemological analysis of the possible power-relations that the information systems professional may be subject to. To do this we broadly sought to follow Foucault (1969) and conduct an archaeology of the knowledge, obtained by open ended interview, of the narrative histories of eight ISD professionals, who came from a diverse set of backgrounds and perspectives spanning project management, systems programming, systems and business analysis, technology and business management, medicine, and systems infrastructure and networking.
The approach we took was firstly to excavate their narratives for significant epistemological elements, elements that seem to hold epistemological significance for the person, horizontally identifying shared and non-shared elements as well. These elements are then vertically transposed to a maximum available set of possible epistemological meanings independent of their origin in the narrative, with identification of groupings of lexical siblings and antonyms becoming the discursive formations. This allows us to…
Subjects/Keywords: Epistemology.; Power.; Information systems.
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APA (6th Edition):
Hart, A. (2014). Power-relations and information systems development. (Thesis). University of Technology, Sydney. Retrieved from http://hdl.handle.net/10453/30347
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):
Hart, AC. “Power-relations and information systems development.” 2014. Thesis, University of Technology, Sydney. Accessed December 16, 2019.
http://hdl.handle.net/10453/30347.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Hart, AC. “Power-relations and information systems development.” 2014. Web. 16 Dec 2019.
Vancouver:
Hart A. Power-relations and information systems development. [Internet] [Thesis]. University of Technology, Sydney; 2014. [cited 2019 Dec 16].
Available from: http://hdl.handle.net/10453/30347.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Hart A. Power-relations and information systems development. [Thesis]. University of Technology, Sydney; 2014. Available from: http://hdl.handle.net/10453/30347
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
NSYSU
28.
Chan, Shu-ting.
The servey of channel transformation of Taiwan enterprise in China.
Degree: Master, Business Management, 2008, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0630108-173249
► Abstract High quality powering systems have become the requirements for computers and electronic devices users. Uninterruptible power systems (UPS) are needed in office automation, home…
(more)
▼ Abstract
High quality powering
systems have become the requirements for computers and electronic devices users. Uninterruptible
power systems (UPS) are needed in office automation, home and small and medium enterprise computers and governmental network projects. In 2006, total UPSs sold in PRC exceeded 1,279 thousand units, with a sales value exceeding 2.61 billion RMB. The UPS industry experienced an 8% stable growth backed by economy growth of PRC.
This research served theoretical basis and the understanding of industry practices as the base, describing the business model of UPS industry in PRC. This thesis also contains an in-depth interview with the leader of Powercom Co., an UPS manufacturer in PRC, on topics such as channel structure (length, width and density), relation control, channel motivation (strategy in effect and methods used) and conflict management (reasons, forms and solutions), trying to combine theories and practices.
This study found that Powercom experienced three channel transformations in PRC market. Phase 1: instead of touching the market directly, they entered PRC via an agent, plays only the role of manufacturer â a longer, narrower channel structure, with a traditional marketing relation aims at short-term profits, and price is the incentive. When the relation went down, Powercom took destructive solutions. Phase 2: Retailing channels were established in provinces in PRC, and the PRC market was divided in to four independent geographic marketing sectors, no intersection selling were allowed â allowing the four sections to have their own storage and selling
systems and compete with each other, resulting horizontal conflicts between section sellers. Phase 3: the marketing efforts are directed by a Great China concept, although the four offices still in charge of dealing orders and selling, no geographical restrictions exist. The channel structure was turned from density to selective distribution. Their relation with distributors are thus turned in to vertical
systems, thus common objective, instead of price alone is the incentive to motivate firm members.
Keywords: Uninterruptible
power systems, cannel transformation
Advisors/Committee Members: Chun-Tuan Chang (chair), Kuang S. Yeh (committee member), Yung-Chih, Lien (chair).
Subjects/Keywords: Uninterruptible power systems; channel transformation
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APA ·
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MLA ·
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Chan, S. (2008). The servey of channel transformation of Taiwan enterprise in China. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0630108-173249
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):
Chan, Shu-ting. “The servey of channel transformation of Taiwan enterprise in China.” 2008. Thesis, NSYSU. Accessed December 16, 2019.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0630108-173249.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chan, Shu-ting. “The servey of channel transformation of Taiwan enterprise in China.” 2008. Web. 16 Dec 2019.
Vancouver:
Chan S. The servey of channel transformation of Taiwan enterprise in China. [Internet] [Thesis]. NSYSU; 2008. [cited 2019 Dec 16].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0630108-173249.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chan S. The servey of channel transformation of Taiwan enterprise in China. [Thesis]. NSYSU; 2008. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0630108-173249
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Pretoria
29.
[No author].
The impact of increased electricity prices on consumer
demand
.
Degree: 2010, University of Pretoria
URL: http://upetd.up.ac.za/thesis/available/etd-03102010-161210/
► The impact on demand resulting from an electricity price increase is unknown, Dekenah, Heunis, Gaunt and Cheek (2003). This study focused on large Eskom customers…
(more)
▼ The impact on demand resulting from an electricity
price increase is unknown, Dekenah, Heunis, Gaunt and Cheek (2003).
This study focused on large Eskom customers (industry and mining)
and the impact of increased electricity prices (Eskom Megaflex
Time-of-Use tariff) on their electricity demand is analysed. Since,
the impact of this can be only be realised in the long-run (> 5
years), this study made use of historical data. In particular, the
impact of the revised Megaflex tariff in 2002, which increased high
season (winter) peak active charges by approximately 40% against an
approximate reduction of 30% in the low season (winter) was
analysed. It was found that the price elasticity of large Eskom
customers is inelastic in the short-run (< 2 years) and elastic
in the long-run. This is particularly evident in the Manufacturing
sector. Furthermore, it was found that price is not the only input
cost in the short-run, but economic factors such as commodity
prices also influence consumption behaviour. This is particularly
evident in the Mining sector. It was also found that alternatives
(i.e. mandatory and voluntary load reduction programmes, etc.)
impact electricity load profiles. In conclusion, this study found
sufficient evidence in support of the research hypothesis.
Copyright
Advisors/Committee Members: Mr M Holland (advisor).
Subjects/Keywords: UCTD;
Electronic power systems
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APA (6th Edition):
author], [. (2010). The impact of increased electricity prices on consumer
demand
. (Masters Thesis). University of Pretoria. Retrieved from http://upetd.up.ac.za/thesis/available/etd-03102010-161210/
Chicago Manual of Style (16th Edition):
author], [No. “The impact of increased electricity prices on consumer
demand
.” 2010. Masters Thesis, University of Pretoria. Accessed December 16, 2019.
http://upetd.up.ac.za/thesis/available/etd-03102010-161210/.
MLA Handbook (7th Edition):
author], [No. “The impact of increased electricity prices on consumer
demand
.” 2010. Web. 16 Dec 2019.
Vancouver:
author] [. The impact of increased electricity prices on consumer
demand
. [Internet] [Masters thesis]. University of Pretoria; 2010. [cited 2019 Dec 16].
Available from: http://upetd.up.ac.za/thesis/available/etd-03102010-161210/.
Council of Science Editors:
author] [. The impact of increased electricity prices on consumer
demand
. [Masters Thesis]. University of Pretoria; 2010. Available from: http://upetd.up.ac.za/thesis/available/etd-03102010-161210/
Georgia Tech
30.
Costley, Mitcham Hudson.
Prosumer-based decentralized unit commitment for future electricity grids.
Degree: PhD, Electrical and Computer Engineering, 2015, Georgia Tech
URL: http://hdl.handle.net/1853/54890
► The contributions of this research are a scalable formulation and solution method for decentralized unit commitment, experimental results comparing decentralized unit commitment solution times to…
(more)
▼ The contributions of this research are a scalable formulation and solution method for decentralized unit commitment, experimental results comparing decentralized unit commitment solution times to conventional unit commitment methods, a demonstration of the benefits of faster unit commitment computation time, and extensions of decentralized unit commitment to handle system network security constraints. We begin with a discussion motivating the shift from centralized
power system control architectures to decentralized architectures and describe the characteristics of such an architecture. We then develop a formulation and solution method to solve decentralized unit commitment by adapting an existing approach for separable convex optimization problems to the nonconvex domain of unit commitment. The potential computational speed benefits of the novel decentralized unit commitment approach are then further investigated through a rolling-horizon framework that represents how system operators make decisions and adjustments online as new information is revealed. Finally, the decentralized unit commitment approach is extended to include network contingency constraints, a crucial function for the maintenance of system security. The results indicate decentralized unit commitment holds promise as a way of coordinating system operations in a future decentralized grid and also may provide a way to leverage parallel computing resources to solve large-scale unit commitment problems with greater speed and model fidelity than is possible with conventional methods.
Advisors/Committee Members: Grijalva, Santiago (advisor), Egerstedt, Magnus (advisor), Ahmed, Shabbir (advisor), Meliopoulos, Sakis (advisor), Ferri, Bonnie (advisor), Saeedifard, Maryam (advisor).
Subjects/Keywords: Power systems; Unit commitment; Optimization
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APA ·
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MLA ·
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Costley, M. H. (2015). Prosumer-based decentralized unit commitment for future electricity grids. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/54890
Chicago Manual of Style (16th Edition):
Costley, Mitcham Hudson. “Prosumer-based decentralized unit commitment for future electricity grids.” 2015. Doctoral Dissertation, Georgia Tech. Accessed December 16, 2019.
http://hdl.handle.net/1853/54890.
MLA Handbook (7th Edition):
Costley, Mitcham Hudson. “Prosumer-based decentralized unit commitment for future electricity grids.” 2015. Web. 16 Dec 2019.
Vancouver:
Costley MH. Prosumer-based decentralized unit commitment for future electricity grids. [Internet] [Doctoral dissertation]. Georgia Tech; 2015. [cited 2019 Dec 16].
Available from: http://hdl.handle.net/1853/54890.
Council of Science Editors:
Costley MH. Prosumer-based decentralized unit commitment for future electricity grids. [Doctoral Dissertation]. Georgia Tech; 2015. Available from: http://hdl.handle.net/1853/54890
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Open Access Theses and Dissertations
