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Dissertations / Theses on the topic 'Electric power distribution. Electric generators'

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Published: 4 June 2021

Last updated: 1 February 2022

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1

Park, Ju-chirl. "Modeling and simulation of selected distributed generation sources and their assessment." Morgantown, W. Va. : [West Virginia University Libraries], 1999. http://etd.wvu.edu/templates/showETD.cfm?recnum=1104.

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Thesis (M.S.)--West Virginia University, 1999.<br>Title from document title page. Document formatted into pages; contains v, 99 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 88-91).

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2

Malinga, Bongani. "Modeling and control of a wind turbine as a distributed resource in an electric power system." Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=2110.

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Thesis (M.S.)--West Virginia University, 2001.<br>Title from document title page. Document formatted into pages; contains xiv, 106 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 90-92).

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3

Palu, Ivo. "Impact of wind parks on power system containing thermal power plants = Tuuleparkide mõju soojuselektrijaamadega energiasüsteemile /." Tallinn : TUI Press, 2009. http://digi.lib.ttu.ee/i/?443.

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4

Khushalani, Sarika. "Development of power flow with distributed generators and reconfiguration for restoration of unbalanced distribution systems." Diss., Mississippi State : Mississippi State University, 2006. http://sun.library.msstate.edu/ETD-db/ETD-browse/browse.

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5

Solanki, Jignesh M. "Multi-agent based control and reconfiguration for restoration of distribution systems with distributed generators." Diss., Mississippi State : Mississippi State University, 2006. http://sun.library.msstate.edu/ETD-db/ETD-browse/browse.

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6

Sklar, Akiva A. "A Numerical Investigation of a Thermodielectric Power Generation System." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/14020.

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The performance of a novel micro-thermodielectric power generation device (MTDPG) was investigated in order to determine if thermodielectric power generation can compete with current portable power generation technologies. Thermodielectric power generation is a direct energy conversion technology that converts heat directly into high voltage direct current. It requires dielectric (i.e., capacitive) materials whose charge storing capabilities are a function of temperature. This property is exploited by heating these materials after they are charged; as their temperature increases, their charge storage capability decreases, forcing them to eject a portion of their surface charge to an appropriate electronic storage device. Previously, predicting the performance of a thermodielectric power generator was hindered by a poor understanding of the materials thermodynamic properties and the affect unsteady heat transfer losses have on system performance. In order to improve predictive capabilities in this study, a thermodielectric equation of state was developed that describes the relationship between the applied electric field, the surface charge stored by the thermodielectric material, and its temperature. This state equation was then used to derive expressions for the material's thermodynamic states (internal energy, entropy), which were subsequently used to determine the optimum material properties for power generation. Next, a numerical simulation code was developed to determine the heat transfer capabilities of a micro-scale parallel plate heat recuperator (MPPHR), a device designed specifically to a) provide the unsteady heating and cooling necessary for thermodielectric power generation and b) minimize the unsteady heat transfer losses of the system. The previously derived thermodynamic equations were then incorporated into the numerical simulation code, creating a tool capable of determining the thermodynamic performance of an MTDPG, in terms of the thermal efficiency, percent Carnot efficiency, and energy/power density, when the material properties and the operating regime of the MPPHR were varied. The performance of the MTDPG was optimized for an operating temperature range of 300 500 K. The optimization predicted that the MTDPG could provide a thermal efficiency of 29.7 percent. This corresponds to 74.2 percent of the Carnot efficiency. The power density of this MTDPG depends on the operating frequency and can exceed 1,000,000 W/m3.

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7

Choi, Sungyun. "Autonomous state estimation and its application to the autonomous operation of the distribution system with distributed generations." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50250.

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The objective of this thesis is to propose guidelines for advanced operation, control, and protection of the restructured distribution system by designing the architecture and functionality for autonomous operation of the distribution system with DGs. The proposed architecture consists of (1) autonomous state estimation and (2) applications that enable autonomous operation; in particular, three applications are discussed: setting-less component protection, instant-by-instant management, and short-term operational planning. Key elements of the proposed approach have been verified: (1) the proposed autonomous state estimation has been experimentally tested using laboratory test systems and (2) the feasibility of the setting-less component protection has been tested with numerical simulations.

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8

Al-Agele, Saif. "Electrical Power and Storage for NASA Next Generation Aircraft." Wright State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright1515632677356171.

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9

Salles, Corrêa Diogo. "Metodologias para analise do risco de ocorrencia de ilhamentos não intencionais de geradores sincronos distribuidos." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/259998.

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Orientadores: Walmir de Freitas Filho, Jose Carlos de Melo Vieira Junior<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação<br>Made available in DSpace on 2018-08-11T06:20:40Z (GMT). No. of bitstreams: 1 SallesCorrea_Diogo_M.pdf: 1373306 bytes, checksum: a6a2357bf0c337089786c03c519bbd7d (MD5) Previous issue date: 2008<br>Resumo: Geradores síncronos conectados em redes de distribuição de energia elétrica estão sujeitos a operarem de forma ilhada após contingências como, por exemplo, curtos-circuitos. Ilhamento ocorre quando uma parte da rede de distribuição opera eletricamente isolada da subestação da concessionária, mas continua a ser energizada por geradores distribuídos. Devido a um conjunto de implicações técnicas e de segurança, a prática atualmente utilizada pelas concessionárias e recomendada pelos principais guias técnicos é desconectar todos os geradores da rede isolada tão logo ocorra um ilhamento. Existem diversas técnicas de proteção desenvolvidas para detectar ilhamentos e a maioria delas possui limitações técnicas e são propensas a falharem em determinadas situações. Neste contexto, torna-se importante conhecer a probabilidade ou risco da proteção falhar na detecção de ilhamentos em sistemas de distribuição de energia elétrica com geradores distribuídos e, por conseguinte, decidir se o sistema de proteção utilizado é adequado ou não. A falha da detecção de uma situação de ilhamento é tecnicamente denominada ilhamento não intencional. Esta dissertação de mestrado apresenta uma série de metodologias desenvolvidas para analisar o risco da ocorrência de ilhamentos não intencionais devido à falha do sistema de proteção de geradores síncronos. O sistema de proteção antiilhamento considerado neste trabalho é composto por relés baseados em medidas de freqüência e/ou tensão visto que atualmente estes são considerados os dispositivos mais eficientes para realizar tal tarefa. Como os desempenhos desses relés estão fortemente relacionados aos desbalanços de potência ativa e reativa na rede ilhada, respectivamente, as metodologias desenvolvidas baseiam-se nas curvas de carga do sistema de distribuição, nos patamares de geração de potência ativa e reativa e no cálculo de um índice numérico que indica o risco de falha da proteção antiilhamento. Diversos métodos eficientes foram desenvolvidos para calcular diretamente este índice de risco sem a necessidade de executar numerosas simulações de transitórios eletromagnéticos. Ressalta-se que os principais fatores que afetam o desempenho do sistema de proteção antiilhamento podem ser prontamente determinados com a aplicação das metodologias desenvolvidas. Os resultados obtidos mostraram-se precisos quando comparados aos obtidos por meio de repetidas simulações do tipo de transitórios eletromagnéticos<br>Abstract: Distributed synchronous generators connected to distribution power systems are prone to operate islanded after contingencies such as short circuits. Islanding occurs when a portion of the distribution network operates electrically isolated from the utility grid substation, yet continues to be energized by local distributed generators connected to the isolated system. Due to a number of technical and safety concerns, the procedure currently adopted by utilities and recommended by the main technical guides is to disconnect all the generators immediately after an islanding event. There are several anti-islanding techniques and the majority of them present technical limitations so that they are likely to fail in certain situations. In this context, it becomes important to know the probability or the risk of the protection scheme to fail in the detection of islanding events in distribution power systems containing distributed generators and, ultimately, determine whether the protection scheme under study is adequate or not. The failure of islanding detection is technically denominated non intentional islanding. This work presents a number of methodologies developed to evaluate the risk of occurrence of non intentional islanding due to the failure of synchronous generators protection systems. The anti-islanding protection system considered in this work is composed of relays based on measures of frequency and/or voltage, since these are considered to be the most efficient methods to perform this task. As the performance of these relays is strongly dependent on the active and reactive power imbalances in the islanded system, respectively, the methodologies are based on the distribution network feeder load curves, the active and reactive power generation levels and on the calculation of numerical index to quantify the risk level of protection system failure. Efficient methods were developed to directly calculate these risk indexes without performing several electromagnetic transient simulations. Through these methods, the main factors impacting on the performance of the antiislanding protection schemes can be determined. The results obtained by the usage of the proposed methodologies presented a very good match with those obtained by electromagnetic transient simulations<br>Mestrado<br>Energia Eletrica<br>Mestre em Engenharia Elétrica

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10

Aljaism, Wadah A., University of Western Sydney, and School of Engineering and Industrial Design. "Control method for renewable energy generators." THESIS_XXX_EID_Aljaism_W.xml, 2002. http://handle.uws.edu.au:8081/1959.7/796.

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This thesis presents a study on the design method to optimise the performance for producing green power from multiple renewable energy generators. The design method is presented through PLC (Programmable Logic Controller) theory. All the digital and analogue inputs are connected to the input cards. According to different operations conditions for each generator, the PLC will image all the inputs and outputs, from these images; a software program has been built to create a control method for multiple renewable energy generators to optimise production of green power. A control voltage will supply the output contractor from each generator via an interface relay. Three renewable generators (wind, solar, battery bank) have been used in the model system and the fourth generator is the back up diesel generator. The priority is for the wind generator due to availability of wind 24 hours a day, then solar, battery bank, and LPG or Diesel generators. Interlocking between the operations of the four contractors has been built to prevent interface between them. Change over between contractors, according to the generator's change over has also been built, so that it will delay supplying the main bus bar to prevent sudden supply to the load. Further study for controlling multiple renewable energy generators for different conditions such as controlling the multi-renewable energy generators from remote, or supplying weather forecast data from bureau of meteorology to the PLC directly as recommended.<br>Master of Electrical Engineering (Hons)

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11

Liao, Te-Ning. "A vertical axial-field generator and its stability in power system /." [Hong Kong : University of Hong Kong], 1986. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12334339.

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12

Eyisi, Chiebuka. "Load Estimation for Electric Power Distribution Networks." Master's thesis, University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5935.

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In electric power distribution systems, the major determinant in electricity supply strategy is the quantity of demand. Customers need to be accurately represented using updated nodal load information as a requirement for efficient control and operation of the distribution network. In Distribution Load Estimation (DLE), two major categories of data are utilized: historical data and direct real-time measured data. In this thesis, a comprehensive survey on the state-of-the-art methods for estimating loads in distribution networks is presented. Then, a novel method for representing historical data in the form of Representative Load Curves (RLCs) for use in real-time DLE is also described. Adaptive Neuro-Fuzzy Inference Systems (ANFIS) is used in this regard to determine RLCs. An RLC is a curve that represents the behavior of the load during a specified time span; typically daily, weekly or monthly based on historical data. Although RLCs provide insight about the variation of load, it is not accurate enough for estimating real-time load. This therefore, should be used along with real-time measurements to estimate the load more accurately. It is notable that more accurate RLCs lead to better real-time load estimation in distribution networks. This thesis addresses the need to obtain accurate RLCs to assist in the decision-making process pertaining to Radial Distribution Networks (RDNs).This thesis proposes a method based on Adaptive Neuro-Fuzzy Inference Systems (ANFIS) architecture to estimate the RLCs for Distribution Networks. The performance of the method is demonstrated and simulated, on a test 11kV Radial Distribution Network using the MATLAB software. The Mean Absolute Percent Error (MAPE) criterion is used to justify the accuracy of the RLCs.<br>M.S.E.E.<br>Masters<br>Electrical Engineering and Computing<br>Engineering and Computer Science<br>Electrical Engineering

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13

Nayar, C. V. "Development of an electrical generation scheme using wind energy." University of Western Australia. Dept. of Electrical and Electronic Engineering, 1985. http://theses.library.uwa.edu.au/adt-WU2006.0118.

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[Truncated Abstract] This thesis describes investigations carried out in the development of a wind powered generation system suitable for interconnection with a power grid ... The simplicity and flexibility exhibited by the induction machines in providing electromechanical energy conversion make it the most favoured choice for wind-powered systems operated in parallel with an existing powers system. Although not as common as the ‘squirrel cage’ induction machine, the slip-ring type has several attractive features in providing constant-frequency ac power when driven from a varaible-speed source such as a wind turbine. The fundamental energy conversion properties of the induction machine system are studied in order to determine the suitability of these systems for constant-frequency variable-speed electric power generation. Two distinct control policies are formulated: (i) optimising power from the wind when the generator is connected to an ‘infinite’ bus bar and, (ii), scheduling a constant output power irrespective of fluctuations in wind speed when the generator is operated in parallel with a ‘weak grid’.

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14

Fletcher, Robert Henry. "Optimal distribution system horizon planning /." Thesis, Connect to this title online; UW restricted, 2007. http://hdl.handle.net/1773/6018.

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15

Matavalam, Roop Kishore R. "Power distribution reliability as a function of weather." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0006668.

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16

Yang, Xiaoguang Miu Karen Nan. "Unbalanced power converter modeling for AC/DC power distribution systems /." Philadelphia, Pa. : Drexel University, 2006. http://hdl.handle.net/1860/1231.

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17

Golder, Andrew S. Miu Karen Nan. "Photovoltaic generator modeling for large scale distribution system studies /." Philadelphia, Pa. : Drexel University, 2006. http://hdl.handle.net/1860/1220.

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18

Aljaism, Wadah. "Control method for renewable energy generators /." View thesis, 2002. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20031223.093139/index.html.

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19

Ozel, Kerem. "Losses In Electric Distribution System." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/2/12607916/index.pdf.

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The purpose of this thesis is to examine the technical losses in Electric Distribution Systems, the sources of the losses, minimum levels of the losses, ways to decrease the losses and current applications in Turkey. The wrong and weak parts of the current applications are determined and emphasized. Ways to decrease losses in Distribution Systems are advised. The energy resources in the world are decreasing rapidly. There is a rapid growth in consumption. It is a must to use existing resources in most efficient way because there is no unlimited energy source. Losses in the electric distribution systems are one of the most important subjects because the most of the technical losses in electric systems occur in the distribution systems.

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20

Murthy, Raghuram Ananda, University of Western Sydney, and of Mechatronic Computer and Electrical Engineering School. "Dynamics of tethering cables for a flying electric generator." THESIS_XXX_MCEE_Murthy_R.xml, 2000. http://handle.uws.edu.au:8081/1959.7/674.

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The dynamics of a tether cable for a flying wind generator, employed to generate electricity by utilising the high velocity jet-stream winds in the troposphere, is analysed. A non-linear mathematical model for the study of the dynamics of the cable is described by a partial differential equation, which is solved analytically without damping. For unsteady and damped states, ordinary differential equations are obtained by adopting a discrete analysis approach, which are solved numerically with the aid of MATLAB software. Solutions are found for a range of lumped masses to represent the cable and each solution is verified against a previous case. Likewise, the result for the three masses is checked against the cable using a single lumped mass. The analysis is extended to seven discrete masses. This research highlights the dynamic behaviour of the cable subjected to wind gusts on the rotors and it also represents an appreciable input to the flying wind generator concept. The dynamic behaviour of the cable is critical for a flying electric generator.<br>Master of Engineering (Hons)

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21

Xia, Xiuxian. "Dynamic power distribution management for all electric aircraft." Thesis, Cranfield University, 2011. http://dspace.lib.cranfield.ac.uk/handle/1826/6285.

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In recent years, with the rapid development of electric and electronic technology, the All-Electric Aircraft (AEA) concept has attracted more and more attention, which only utilizes the electric power instead of conventional hydraulic and pneumatic power to supply all the airframe systems. To meet the power requirements under various flight stages and operating conditions, the AEA approach has resulted in the current aircraft electrical power generation capacity up to 1.6 MW. To satisfy the power quality and stability requirements, the advanced power electronic interfaces and more efficient power distribution systems must be investigated. Moreover, with the purpose of taking the full advantages of available electrical power, novel dynamic power distribution management research and design for an AEA must be carried out. The main objective of this thesis is to investigate and develop a methodology of more efficient power distribution management with the purpose of minimizing the rated power generating capacity and the mass of the electrical power system (EPS) including the power generation system and the power distribution system in an AEA. It is important to analyse and compare the subsistent electrical power distribution management approaches in current aircraft. Therefore the electrical power systems of A320 and B777, especially the power management system, will be discussed in this thesis. Most importantly the baseline aircraft, the Flying Crane is the outcome of the group design project. The whole project began in March 2008, and ended in September 2010, including three stages: conceptual design, preliminary design and detailed design. The dynamic power distribution management research is based on the power distribution system of the Flying Crane. The main task of the investigation is to analyse and manage the power usage among and inside typical airframe systems by using dynamic power distribution management method. The characteristics and operation process of these systems will be investigated in detail and thoroughly. By using the method of dynamic power distribution management, all the electrical consumers and sub-systems powered by electricity are managed effectively. The performance of an aircraft can be improved by reducing the peak load requirement on board. Furthermore, the electrical system architecture, distributed power distribution system and the dynamic power distribution management system for AEA are presented. Finally, the mass of the whole electrical power system is estimated and analysed carefully.

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22

Kline, Daniel B. "Graphical modeling of shipboard electric power distribution systems." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1993. http://handle.dtic.mil/100.2/ADA276742.

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23

Bertling, Lina. "Reliability-centred maintenance for electric power distribution systems." Doctoral thesis, KTH, Electrical Systems, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3391.

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24

廖德寧 and Te-Ning Liao. "A vertical axial-field generator and its stability in power system." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1986. http://hub.hku.hk/bib/B31207789.

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25

Oka, Ashok A. "Reliability and restoration algorithms for electrical distribution systems." Diss., This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-08232007-111001/.

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26

Xu, Ran. "Loss of field protection and its impact on power system stability." Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Thesis/Fall2009/r_xu_120109.pdf.

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Thesis (M.S. in electrical engineering)--Washington State University, December 2009.<br>Title from PDF title page (viewed on Jan. 28, 2010). "School of Electrical Engineering and Computer Science." Includes bibliographical references (p. 99-101).

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27

Lindsey, Keon. "A feasibility study of oscillating-wing power generators." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2002. http://library.nps.navy.mil/uhtbin/hyperion-image/02sep%5FLindsey.pdf.

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Thesis (M.S. in Aeronautical Engineering)--Naval Postgraduate School, September 2002.<br>Thesis advisor(s): Kevin D. Jones, Max F. Platzer. Includes bibliographical references (p. 61). Also available online.

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28

Lee, Seung Jae. "Configuration control of distribution feeders in normal and emergency states /." Thesis, Connect to this title online; UW restricted, 1988. http://hdl.handle.net/1773/5923.

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Brown, Richard E. "Reliability assessment and design optimization in electric power distribution systems /." Thesis, Connect to this title online; UW restricted, 1996. http://hdl.handle.net/1773/6036.

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30

Mellet, Dieter Sydney-Charles. "An integrated continuous output linear power sensor using Hall effect vector multiplication." Diss., Pretoria : [s.n.], 2002. http://upetd.up.ac.za/thesis/available/etd-09012005-120807.

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Chan, Morgan Hing-Lap. "Communication channel characteristics and behaviour of intrabuilding power distribution circuits." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/25081.

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Intrabuilding power distribution circuits offer a number of unique advantages for local area networking. To enable the selection of proper error-control codes and protocols for reliable data communication services, error pattern statistics of intrabuilding power line channels are obtained. Also, error-causing disturbances are identified and their relationships to specific types of error patterns are determined. It is found that error occurrence is highly periodic, with periodicity being a function of the power line frequency which is nominally 60Hz in North America. Furthermore, results indicate that error pattern behaviour is relatively insensitive to communication carrier frequency and modulation schemes. Based on the measurement results, hybrid ARQ with bit-interleaving is suggested for reliable data transmission at high data rate (19,200bps). Burst error correcting codes can be used to reduce decoder cost and complexity with some sacrifices in performance. At lower data rates (1,200bps or below), effective error control can be accomplished more easily. Finally, the attenuation characteristics of a number of typical power line channels are presented. It is found that high frequency bypass can be used to improve signal transmission between different phases of the distribution transformer.<br>Applied Science, Faculty of<br>Electrical and Computer Engineering, Department of<br>Graduate

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Mbango, Fessor. "Investigation into alternative protection solutions for distribution networks." Thesis, Cape Peninsula University of Technology, 2009. http://hdl.handle.net/20.500.11838/1107.

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Thesis (MTech (Electrical Engineering))--Cape Peninsula University of Technology, 2009<br>Recently, due to concerns about the liberalization of electricity supply, deregulation and global impact on the environment, securing a reliable power supply has become an important social need worldwide To ensure this need is fulfilled, detailed investigations and developments are In progress on power distribution systems protection and the monitoring of apparatus which Is part of the thesis. The main objective of a protection schemes is mainly to keep the power system stable by isolating only the affected components or the section of the electricity network in which the fault has developed while allowing the rest of the network to continue operating. It is important to note that the protection equipment does not prevent faults from occurring, but it limits the damaging effect of the fault and protects other healthy equipment. This is only achieved if the protection system of the electrical network involved complies with the requirements and purpose of the electrical protection standards. These requirements include the Operational speed, Reliability, Security and Sensitivity. In conventional substations that are still existing Within the utilities networks, a number of long cables are then used to complete the links between substation equipment in order for them to communicate (hardwired). This method is uneconomical and is being phased out completely in the near future. Over the last few years a new standard for substation automation communication has been developed Within the International Electrotechnical Commission (IEC), the IEC 61850. This standard defines the integration requirements of multi-vendor compliant relays and other lED's for multiple protection schemes as well as control and automation techniques. In this particular thesis, Distribution protection is the area of interest, particularly the application of Time and Overcurrent protection schemes. A look into different protection alternatives and the application of new technologies for Electrical Power Distribution Systems that unify protection and control units so that they can be incorporated into Intelligent Substation as opposed to the most existing (conventional substation) is analyzed. The proposed algorithm has been verified through simulations of the CPUT and Eureka three phase power distribution systems. A testing Lab is also part of this thesis and Is meant for experiments as well as simulation performance in order to gain knowledge and skills for designing and engineer substations with lEG 61850 standards equiprnents. The results indicate that the reduction of copper wiring cable has increased and the communication speed has improved and simplified.

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Chen, William Wen-Hou. "An auxiliary power distribution network for an electric vehicle." Thesis, University of Canterbury. Department of Electrical and Computer Engineering, 2003. http://hdl.handle.net/10092/2284.

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The University of Canterbury purchased a modern Toyota MR2 sports car with the intention of converting it into an electric vehicle. Similar to the common combustion engine vehicles, electric vehicles requires power and control systems to operate the 12Vdc auxiliaries, such as lights, indicators and wipers. Traditional technology results in a large number of wires in the wiring harness. To reduce the number of wires, an alternative method is to use a pair of control lines and a universal power connection around the vehicle. This power and control system is named the "Power Distribution Network" and it is implemented by using multiple power converters and a differential control system. This thesis presents the design, implementation, and test results of the Power Distribution Network for the MR2. The 300Vdc nominal battery voltage is converted to an intermediate voltage of 48V. This configuration is considered more efficient than the usual 12V distribution system since smaller and lighter wires can be used to carry same amount of power. The Power Distribution Network operates off the 48V intermediate voltage, and provides 12V output power to drive all the auxiliaries in the vehicle. The Power Distribution Network also has the ability of detect faults from the auxiliary loads as well as turn on and off these loads. The Power Distribution Network is implemented with two major systems: the Auxiliary Power System, which consists of a 360W Cuk converter with current limiting control circuits to step-down voltage from the 48V intermediate voltage to the 12V. The other system is the CAN Control system, it is developed using micro-controllers and standalone CAN controllers that control and monitor the auxiliary loads in the vehicle. The prototype Power Distribution Network is fully operational and has been tested with eight of 12V light bulbs which are used to simulate the auxiliary loads in the vehicle. Experimental measurements show that the prototype is able to successfully control the light bulbs under the full load condition. This confirms that in principle the Power Distribution Network is suitable as the power and control system for the auxiliary loads in an electric vehicle.

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McDonald, John D. F. "Investigations into the design of Powerformer for optimal generator and system performance under fault conditions /." [St. Lucia, Qld], 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18316.pdf.

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Bachry, Andrzej. "Power quality studies in distribution systems involving spectral decomposition." Magdeburg : Univ, 2004. http://www.loc.gov/catdir/toc/fy0604/2005390390.html.

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Arunachalam, Suresh. "Expansion of an existing power system - a study." Diss., Rolla, Mo. : University of Missouri--Rolla, 1989. http://scholarsmine.mst.edu/thesis/pdf/Arunachalam_09007dcc805881ce.pdf.

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Thesis (M.S.)--University of Missouri--Rolla, 1989.<br>Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed October 7, 2008) Includes bibliographical references (p. 89).

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Vieira, Thiago Correia. "Metodologia para avaliação do risco de ilhamento não intencional de geradores eólicos distribuídos." reponame:Repositório Institucional da UFABC, 2014.

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Orientador: Prof. Dr. Ahda Pionkoski Grilo Pavani<br>Dissertação (mestrado) - Universidade Federal do ABC, Programa de Pós-Graduação em Engenharia Elétrica, 2014.<br>O ilhamento não intencional ocorre quando a proteção não é capaz de detectar a operação ilhada de parte do sistema de distribuição. Estas falhas ocorrem para condições específicas de geração e carga do subsistema ilhado, nas quais as variações de tensão e frequência após o ilhamento não são suficientes para sensibilizar a proteção. Neste trabalho é apresentada uma metodologia para o cálculo do índice de risco de ilhamento não intencional de geradores eólicos distribuídos, considerando que estes geradores empregam relés de sub/sobrefrequência e sub/sobretensão para proteção anti-ilhamento. A metodologia desenvolvida utiliza curvas características de velocidade de vento de uma região e curvas de carga para identificar as possíveis condições de operação do sistema. Com a aplicação da metodologia proposta é possível avaliar o risco da proteção anti-ilhamento baseada em relés de sub/sobretensão e sub/sobrefrequência não detectar o ilhamento. Como resultado, a concessionária poderá avaliar se somente a proteção anti-ilhamento baseada nestes relés é suficiente, ou se devido ao alto risco de não detecção esquemas mais sofisticados devem ser empregados.<br>The unintentional islanding occurs when the protection is not able to detect the islanded part of the distribution system operation. These failures occur for specific conditions of generation and load islanded subsystem in which the variations of voltage and frequency after islanding are not sufficient to sensitize protection. In this work a methodology to calculate the unintentional islanding risk index of distributed wind generators is presented, considering that these generators employ under/overfrequency and under/overvoltage protection relays for anti-islanding. The methodology uses the characteristic curves of wind speed in a region and load curves to identify the possible operating conditions of the system. Proposed methodology can assess the risk of anti-islanding protection based on under/overvoltage and under/overfrequency relays not detect islanding condition. As a result, the utility can only assess whether the anti-islanding protection based on these relays is sufficient, or if due to the high risk of failure to detect more sophisticated schemes must be employed.

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Lee, Cheuk-wing. "Transmission expansion planning in a restructured electricity market." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B38959410.

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Mehryoon, Shah M. "Analysis and comparison of power loss and voltage drop of 15 kV and 20 kV medium voltage levels in the north substation of the Kabul power distrubution system by CYMDIST." Ohio : Ohio University, 2009. http://www.ohiolink.edu/etd/view.cgi?ohiou1258137124.

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Kunte, Rohit S. "A wavelet transform-based islanding detection algorithm for inverter assisted distributed generators a thesis presented to the faculty of the Graduate School, Tennessee Technological University /." Click to access online, 2009. http://proquest.umi.com/pqdweb?index=8&sid=2&srchmode=1&vinst=PROD&fmt=6&startpage=-1&clientid=28564&vname=PQD&RQT=309&did=1786737271&scaling=FULL&ts=1250274536&vtype=PQD&rqt=309&TS=1250275236&clientId=28564.

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Morton, Anthony B. "Managed DC power reticulation systems /." Connect to thesis, 1999. http://eprints.unimelb.edu.au/archive/00000655.

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Wang, Yen-Ju. "Modeling, prediction and mitigation of power distribution system voltage distortion caused by nonlinear loads /." free to MU campus, to others for purchase, 2000. http://wwwlib.umi.com/cr/mo/fullcit?p9974696.

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Sun, Yi, and 孙毅. "Path-dependent valuation of generators in the capacity, energy and carbon markets." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B45876332.

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Khaliq, Abdul. "Preventive control for the attainment of a dynamically secure power system." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/13893.

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Angeles-Camacho, César. "Phase domain modelling and simulation of large-scale power systems with VSC-based FACTS equipment." Connect to e-thesis, 2005. http://theses.gla.ac.uk/849/.

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Thesis (Ph.D.) -- University of Glasgow, 2005.<br>Ph.D. thesis submitted to the Department of Electronics and Electrical Engineering, University of Glasgow, 2005. Includes bibliographical references. Print version also available.

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Fallier, William F. "Analysis of system wide distortion in an integrated power system utilizing a high voltage DC bus and silicon carbide power devices." Thesis, Monterey, California. Naval Postgraduate School, 2007. http://hdl.handle.net/10945/3006.

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This research investigates the distortion on the electrical distribution system for a high voltage DC Integrated Power System (IPS). The analysis was concentrated on the power supplied to a propulsion motor driven by an inverter with simulated silicon carbide switches. Theoretically, silicon carbide switches have the advantage of being able to withstand a very large blocking voltage and carry very large forward currents. Silicon carbide switches are also very efficient due to their quick rise and fall times. Since silicon carbide switches can withstand high voltage differentials and switch faster than silicon switches, the switching effects on the electrical distribution system were investigated. The current state of silicon carbide power electronics was also investigated. This research quantifies the current and voltage distortion over various operating conditions. A system model was developed using Matlab, Simulink, and SimPowerSystems. The model consisted of a synchronous generator supplying a rectifier and inverter set driving an induction motor. This induction motor simulates the propulsion motor for a Navy ship. This model had a DC link voltage of 10 kV in order to simulate future Navy IPS systems. The current and voltage distortion were compared to MIL STD 1399 and IEEE STD 519 and 45.<br>Contract Number: N62271-97-G-0026

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Nduku, Nyaniso Prudent. "Development of methods for distribution network power quality variation monitoring." Thesis, Cape Peninsula University of Technology, 2009. http://hdl.handle.net/20.500.11838/1144.

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Thesis (MTech (Electrical Engineering))--Cape Peninsula University of Technology, 2009<br>The purpose of this project is to develop methods for distribution network power quality' variations monitoring. Power quality (PO) has become a significant issue for both power suppliers and customers. There have been important changes in power system regarding to power quality requirements. "Power quality" is the combination at voltage quality and current quality. The main research problem of the project is to investigate the power quality of a distribution network by selection of proper measurement, applying and developing the existing classic and modern signal conditioning methods for power disturbance's parameters extracting and monitoring. The research objectives are: To study the standard lEC 61000-4-30 requirements. to investigate the common couplings in the distribution network. To identity the points for measurement, to develop MySQL database for the data from the measurement and to develop MATLAB software tor simulation of the network To develop methods based on Fourier transforms for estimation of the parameters of the disturbances. To develop software for the methods implementation, The influence of different loads on power quality disturbances are considered in the distribution network. Points on the network and meters according to the lEC power quality standards are investigated and applied for the CPUT Bellville campus distribution network. The implementation of the power quality monitoring for the CPUT Bellville campus helps the quality of power supply to be improved and the used power to be reduced. MATLAB programs to communicate with the database and calculate the disturbances and power quality parameters are developed.

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Javanshir, Marjan. "DC distribution system for data center." Thesis, Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B39344952.

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Julie, Ferdie Gavin. "Development of an IEC 61850 standard-based automation system for a distribution power network." Thesis, Cape Peninsula University of Technology, 2014. http://hdl.handle.net/20.500.11838/1183.

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Thesis submitted in fulfillment of the requirements for the degree Master of Technology: Electrical Engineering in the Faculty of Engineering at the Cape Peninsula University of Technology<br>The electric power distribution network, an essential section of the electric power system, supplies electrical power to the customer. Automating the distribution network allows for better efficiency, reliability, and level of work through the installation of distribution control systems. Presently, research and development efforts are focused in the area of communication technologies and application of the IEC 61850 protocol to make distribution automation more comprehensive, efficient and affordable. The aim of the thesis is to evaluate the relevance of the IEC61850 standard-based technology in the development and investigation of the distribution automation for a typical underground distribution network through the development of a distribution automation algorithm for fault detection, location, isolation and service restoration and the building of a lab scale test bench Distribution Automation (DA) has been around for many decades and each utility applies its developments for different reasons. Nowadays, due to the advancement in the communication technology, authentic and automatic reconfigurable power system that replies swiftly to instantaneous events is possible. Distribution automation functions do not only supersede legacy devices, but it allows the distribution network to function on another lever. The primary function of a DA system is to enable the devices on the distribution network to be operated and controlled remotely to automatically locate, isolate and reconnect supply during fault conditions. Utilities have become increasingly interested in DA due to the numerous benefits it offers. Operations, maintenance and efficiencies within substations and out on the feeders can be improved by the development of new additional capabilities of DA. Furthermore, the new standard-based technology has advanced further than a traditional Distribution Supervisory and Control Data Acquisition (DSCADA) system. These days the most important components of a DA system include Intelligent Electronic Devices (IEDs). IEDs have evolved through the years and execute various protection related actions, monitoring and control functions and are very promising for improving the operation of the DA systems. The thesis has developed an algorithm for automatic fault detection, location, isolation and system supply restoration using the functions of the IEC61850 standard-based technology. A lab scale system that would meet existing and future requirements for the control and automation of a typical underground distribution system is designed and constructed. The requirement for the lab scale distribution system is to have the ability to clear faults through reliable and fast protection operation, isolate faulted section/s, on the network and restore power to the unaffected parts of the network through automation control operation functions of the IEC61850 standard. Various tests and simulations have been done on the lab scale test bench to prove that the objective of the thesis is achieved. Keywords: IEC61850 Standard, Distribution automation, Distribution automation system, IEDs, Lab scale test bench, Protection, Algorithm for automatic control

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Gudivada, Venkata Thulasi Prasad. "Impact of photovoltaic generators and electric vehicles on a weak low voltage distribution grid." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/43810.

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In this thesis, the behaviour of a weak power distribution grid at the Point of Common Coupling (PCC) in the presence of a Photovoltaic (PV) inverter and Electric Vehicles (EV) as loads is analyzed. The grid connected to PV and EV has high impedance. The impact at PCC when the injected power varies in conjunction with the frequency and voltage deviation with a delay in inverter fed power is elaborated. Various measures such as peak shaving, coordinated charging, voltage drop correction have already been developed to mitigate the impact at PCC. These measures are observed on a combined EV and PV setup. In general, the grid tied inverter injects power based on an average grid voltage calculation at stable synchronization with the grid. If an error (for instance, an error in average grid voltage calculation) persists in such a case causing a loss in synchronization between the PV inverter and the grid, then a delay in the power injected may result in an oscillation at the PCC. A simple two bus system is considered to analyze the result of transportation delay. The delay and droop parameters of the PV inverter are altered whose results are quantitatively analyzed. The model abides the grid codes for active power reduction and static voltage support requirements. Further, the impact of a fault along with an inverter delay is analyzed. Simulative analysis is performed in the DIgSILENT PowerFactory software. To reduce the impact at PCC, performance criteria are analyzed whose parameters could be measured and altered. Scenarios are developed to analyze EV‟s impact in the presence and absence of storage and Distributed Generator (DG) that can be extended onto the micro grids.

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