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Dissertations / Theses on the topic 'Power System Losses'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Suriyamongkol, Dan. "Non-Technical losses in electrical power systems." Ohio University / OhioLINK, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1175007802.

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2

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 distributi

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3

Idoniboyeobu, Dikio Clifford. "Transient performance of protection current transformers including representation of saturation and core losses." Thesis, University of Manchester, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.291733.

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4

Alqarni, Mohammed. "A high efficiency photovoltaic inverter system configuration with maximum power point tracking." Thesis, Brunel University, 2016. http://bura.brunel.ac.uk/handle/2438/12767.

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The increase in demand for renewable energy sources has been exponential in recent years and is mainly driven by factors that include the growth of greenhouse emissions and the decline in fossil fuel reservoirs. Photovoltaic (PV) energy, one of the more prominent renewable energy sources, produces electricity directly from sunlight, noiselessly and harmlessly to the environment. Additionally, PV energy systems are easy to install and financially supported by many governments, which has helped disseminate PV technology worldwide. The total generated power from PV installations (and the number o

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5

Ainah, Priye. "Coordinated active power reduction strategy for voltage rise mitigation in LV distribution network." Thesis, University of Cape Town, 2018. http://hdl.handle.net/11427/28351.

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Integration of renewable energy systems by the utility, customers, and the third party into the electric power system, most especially in the MV and LV distribution networks grew over the last decade due to the liberalization of the electricity market, rising energy demand, and increasing environmental concern. The distributed rooftop PV system contributes to relieve the overall load, reduce losses, avoid conventional generation upgrade, and better matching of demand on the LV distribution network. Originally, the LV distribution network is designed for unidirectional current flow, that is fro

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6

Jadli, Utkarsh. "Parasitic Capacitances of Power Transistors and Their Effects in Power Electronic Systems." Thesis, Griffith University, 2021. http://hdl.handle.net/10072/409657.

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Power electronic circuits are often called switching converters because of the use of power semiconductor devices that act as switches to facilitate necessary conversions of electrical energy from one form to another. There are energy losses during this conversion, and the power semiconductor devices are a major contributor to the reduced conversion efficiency. In the case of power transistors, the resistance of the device (commonly referred as “on resistance”) operating as a switch in “on” mode is responsible for the so-called conduction losses, whereas intrinsic parasitic capacitances are re

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7

Altamirano, Chavez Armando. "An efficient algorithm using Householder's formulas for the solution of faulted power systems." Thesis, Kansas State University, 1986. http://hdl.handle.net/2097/9896.

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8

Venkatesan, Balaji Srinivasan. "Modeling, Simulation and Correlation of Drag losses in a Power Transfer Unit of an All- Wheel Drive System." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-283800.

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A Power Transfer Unit (PTU) of an All-Wheel Drive System is a hypoid gear transmission unit that distributes the power from the vehicle transmission to all wheels of the vehicle. This thesis aims at increasing the fidelity of the analytical power loss calculation methods through test data correlation and develop a 1D simulation model that can be used to evaluate the drag losses in the PTU at early design stages. Firstly, the analytical methods to predict the frictional losses and oil churning losses due to the hypoid gearset, rolling bearings and seals immersed in oil are studied. Several dra

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9

Brossier, Pierre. "Combined analytical and empirical modelling of power losses in rolling element bearings." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI081.

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Le développement de l’industrie du transport conduit la conception de transmissions mécaniques de puissance toujours plus légères et efficientes. Les composants de ces transmissions doivent supporter des efforts transmis dans des environnements de plus en plus restreints. Du fait que les carters soient devenus de plus en plus compacts, les systèmes de refroidissement se sont aussi complexifiés. C’est dans ce contexte que les paliers à roulement, plus communément appelés roulements, doivent produire moins de chaleur, opérer dans des espaces plus proches des engrènements, tout en ayant des durée

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10

Li, Ke. "Analysis of Energy losses of Microbial Fuel Cells (MFCs) and Design of an Innovative Constructed Wetlands-MFC." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1500604673955179.

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11

Dresch, Rodolfo de Freitas Valle. "Análise do efeito da modelagem da carga nas estimativas de perdas elétricas em sistemas de distribuição." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/103754.

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As perdas elétricas, que no Brasil giram em torno de 14,4%, são prejudiciais ao desempenho técnico e financeiro das concessionárias de energia elétrica, principalmente em um cenário de uma eminente crise energética e alta regulação. A mitigação das perdas elétricas está diretamente relacionada com sua correta estimação. Para operar um sistema de energia elétrica, é de fundamental importância definir a correta modelagem dos elementos do sistema. As metodologias de estimação das perdas de energia, para sistemas de distribuição, vigentes não levam em conta possíveis erros na correta modelagem das

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12

Марчук, Павло Павлович, та Pavlo Marchuk. "Вплив географічно розподілених відновлювальних джерел енергії на втрати в електричних мережах". Master's thesis, Тернопільський національний технічний університет імені Івана Пулюя, кафедра електричної інженерії,Тернопіль, Україна, 2020. http://elartu.tntu.edu.ua/handle/lib/33204.

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Розроблено метод, який базується на аналізі чутливості, втрат потужності в електромережі і дозволяє однозначно характеризувати доцільність приєднання розподілених джерел енергії в обраних вузлах, виходячи з технічної ефективності експлуатації розподільних мереж, а також мінімізації втрат електроенергії при її транспортуванні.<br>Метою кваліфікаційної роботи було дослідити впливінтеграції сонячних фотоелектричних установок до існуючої розподільчої мережі.Удосконалено методику, яка базується на аналізі чутливості втрат потужності в електромережі і дозволяє однозначно характеризувати доцільність

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13

Кріса, Андрій Володимирович, та Andrii Krisa. "Розробка заходів зниження втрат електроенергії в системі електропостачання металообробного цеху". Master's thesis, ТНТУ імені Івана Пулюя, 2019. http://elartu.tntu.edu.ua/handle/lib/29780.

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В дипломній роботі проведено модернізацію системи електропостачання металообробного цеху електромеханічного заводу відповідно до розроблених заходів зниження втрат електроенергії. Проведено дослідження математичної моделі вибору оптимальних проектних рішень для системи електропостачання металообробного цеху по критерію мінімуму затрат, та згідно з нею здійснено розрахунки електричних навантажень цеху, вибір оптимального місця розташування центру живлення та оптимальних потужностей силових трансформаторів КТП. Проведено вибір оптимальної схеми силової та освітлювальної мережі металообробного це

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14

Mohammad, Mostak. "Optimization of Inductive Wireless Charging Systems for Electric Vehicles: Minimizing Magnetic Losses and Limiting Electromagnetic Field Emissions." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1564756659521461.

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15

Bueno, Edilson Aparecido. "Redução de perdas tecnicas atraves de reconfigurações de redes de distribuição de energia eletrica sob demandas variaveis." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/261734.

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Orientadores: Christiano Lyra Filho, Celso Cavellucci<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação<br>Made available in DSpace on 2018-08-07T20:13:55Z (GMT). No. of bitstreams: 1 Bueno_EdilsonAparecido_M.pdf: 1593593 bytes, checksum: ff2749c689002cc1c4de48ee0899defc (MD5) Previous issue date: 2005<br>Resumo: Este trabalho apresenta uma nova visão para o problema de redução das perdas técnicas em sistemas de distribuição de energia elétrica, através de reconfiguração de redes. A principal inovação consiste em abordar o problem

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16

Silva, Carlos Alexandre Ferreira Da. "Modeling and optimization of power losses in poly-V belt transmissions : Application to the Front Engine Accessory Drive of trucks." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEI079/document.

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Ces travaux s’inscrivent dans le cadre du projet EDIT(Efficient Distribution Truck, FUI19), piloté par le groupe Volvo Trucks, dont l’objectif de réduction de consommation pour 2020 est fixé à 13% par rapport à un véhicule actuel EURO-6. Le projet EDIT porte sur cinq axes techniques d’amélioration dont un consiste en l’obtention d’un système optimisé de transmission par courroie poly-V au regard des pertes de puissance. Actuellement les faces avant de moteur sont perfectionnées sur le plan mécanique ; cela signifie que la durée de vie de ses composants est optimisée, et que les nuisances vibra

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17

Гапон, Дмитро Анатолійович. "Методи та засоби аналізу якості електропостачання та електромагнітної сумісності електротехнічних комплексів та систем". Thesis, Національний технічний університет "Харківський політехнічний інститут", 2020. http://repository.kpi.kharkov.ua/handle/KhPI-Press/48421.

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Дисертація на здобуття наукового ступеня доктора технічних наук за спеціальністю 05.09.03 – "Електротехнічні комплекси та системи". – Національний технічний університет "Харківський політехнічний інститут", Харків, 2019. У дисертаційній роботі вирішується важлива науково-технічна проблема підвищення якості електропостачання електротехнічних об'єктів, комплексів та систем і забезпечення їх електромагнітної сумісності шляхом розвитку математичного та апаратного забезпечення систем обліку електроенергії з урахуванням енергетичної ефективності режимів електроспоживання і виявлених порушень меж ел

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18

Sehil, Khaled. "A super-capacitor based energy storage for quick variation in stand-alone PV systems." Thesis, Brunel University, 2018. http://bura.brunel.ac.uk/handle/2438/16222.

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Photovoltaic (PV) system is one of the most prominent energy sources, producing electricity directly from sunlight. In additionally, it is easy to install and is supported financially by many governments as part of their strategy to reduce CO2 gas emissions, and to achieve their agreed set of reduction targets by 2020. In the meantime, researchers have been working on the PV system to make it more efficient, easy to maintain, reliable to use and cost effective. In the stand-alone PV system, a battery is required. This is due to the fluctuating nature of the output energy delivered by the PV ar

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19

Das, Choton Kanti. "Smart management strategies of utility-scale energy storage systems in power networks." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2019. https://ro.ecu.edu.au/theses/2209.

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Power systems are presently experiencing a period of rapid change driven by various interrelated issues, e.g., integration of renewables, demand management, power congestion, power quality requirements, and frequency regulation. Although the deployment of Energy Storage Systems (ESSs) has been shown to provide effective solutions to many of these issues, misplacement or non-optimal sizing of these systems can adversely affect network performance. This present research has revealed some novel working strategies for optimal allocation and sizing of utility-scale ESSs to address some important is

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20

Faria, Lucas Teles de [UNESP]. "Estimação espaço-temporal das perdas não técnicas no sistema de distribuição de energia elétrica." Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/137834.

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Submitted by LUCAS TELES DE FARIA null (lucas.teles.faria@gmail.com) on 2016-04-06T05:42:40Z No. of bitstreams: 1 TESE_DOUTORADO_ENG.ELETRICA_LUCAS-TELES-DE-FARIA.pdf: 4869615 bytes, checksum: 5cea8811bb7d053c5440e3d6fb5d55cd (MD5)<br>Approved for entry into archive by Juliano Benedito Ferreira (julianoferreira@reitoria.unesp.br) on 2016-04-07T19:51:32Z (GMT) No. of bitstreams: 1 faria_lt_dr_ilha.pdf: 4869615 bytes, checksum: 5cea8811bb7d053c5440e3d6fb5d55cd (MD5)<br>Made available in DSpace on 2016-04-07T19:51:32Z (GMT). No. of bitstreams: 1 faria_lt_dr_ilha.pdf: 4869615 bytes, checksum:

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Ставицький, Валерій Вікторович, Олександр Васильович Башта, Павло Леонідович Носко, and Юрій Олександрович Цибрій. "Losses of power in the gear systems." Thesis, National Aviation University, 2019. http://er.nau.edu.ua/handle/NAU/39481.

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This paper provides a review of experimental investigations and available models of gear load-independent power losses for spur, helical, and bevel gears. The aim of the review is to provide a comprehensive compilation of published information on gear load-independent power losses to assist gearbox designers in identifying relevant experimental and modeling information.

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22

Seetharaman, Satya. "An Investigation of Load-independent Power Losses of Gear Systems." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1248457135.

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23

Svoboda, Ondřej. "Návrh elektrizace jednokolejné trati." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2019. http://www.nusl.cz/ntk/nusl-400599.

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The main topic of the thesis is the design of single-track electrification of a direct current system of 3 kV and an alternating current system of 5 kV 50 Hz and then economically evaluate it over a period of 30 years. The work deals with basic traction systems and also deals with the calculation of main parameters of electric trains. The thesis describes in detail the procedure for the design of the electrification of the track and a partial introduction to the simulation programs that were used for energy calculations.

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Montsutsumi, Márcio Masatoshi [UNESP]. "Otimização simultânea da reconfiguração e da alocação de bancos de capacitores em sistema de distribuição radiais utilizando uma estratégia multipartida." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/148620.

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Submitted by MÁRCIO MASATOSHI MONTSUTSUMI null (montsujp@gmail.com) on 2017-01-25T16:40:08Z No. of bitstreams: 1 Dissertação_Márcio.pdf: 1995959 bytes, checksum: 8aa82a70776b8de6528f15a91ec55e78 (MD5)<br>Approved for entry into archive by LUIZA DE MENEZES ROMANETTO (luizamenezes@reitoria.unesp.br) on 2017-01-27T12:45:18Z (GMT) No. of bitstreams: 1 montsutsumi_mm_me_ilha.pdf: 1995959 bytes, checksum: 8aa82a70776b8de6528f15a91ec55e78 (MD5)<br>Made available in DSpace on 2017-01-27T12:45:18Z (GMT). No. of bitstreams: 1 montsutsumi_mm_me_ilha.pdf: 1995959 bytes, checksum: 8aa82a70776b8de6528f1

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Montsutsumi, Márcio Masatoshi. "Otimização simultânea da reconfiguração e da alocação de bancos de capacitores em sistema de distribuição radiais utilizando uma estratégia multipartida /." Ilha Solteira, 2017. http://hdl.handle.net/11449/148620.

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Orientador: Rubén Augusto Romero Lázaro<br>Resumo: The purpose of this research is to develop a tool for optimization in power system distribution that uses meta-heuristic based on a multi-start methodology to reconfigure and allocate fixed and switched capacitor banks to obtain the radial topology that presents the lowest operating cost. To find initial radial topologies for system reconfiguration, the Prim algorithm was applied and to the current solution an improvement process called “neighborhood search” was performed. The improved system is subjected to a capacitor allocation algorithm sh

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26

Chayanam, Kavitha. "Analysis of Telecommunications Outages Due to Power Loss." Ohio University / OhioLINK, 2005. http://www.ohiolink.edu/etd/view.cgi?ohiou1125024491.

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Vaněrková, Tereza. "Návrh chlazení elektrických strojů pro výrobní stroje a systémy." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-432781.

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The aim of this thesis is to design the water-cooling system for a synchronous motor with an output of 10kW. The power loss was analytically determinated. For the initial water-cooling system and for two design proposals, thermal models were calculated in Ansys. The same boundary conditions were set for all three models. Then the analysis results of the temperature distribution on the machine surface and in the slots were compared. The comparison also includes the economical cost of the production and service of the machine. Then the production documentation was created, consisting of the asse

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28

Vedera, Kevin G. "An Experimental Methodology for Evaluating Power Losses of Rolling Element Bearings Subjected to Combined Radial and Axial Loads." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1522933829712819.

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Neurouth, Adrien. "Etude de la performance énergetique d’une transmission de puissance haute vitesse." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI017/document.

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Une des voies d’amélioration des véhicules hybrides et électriques est l’utilisation de moteurs tournant plus vite, jusqu’à plus de 42.000tr/min. Le but est d’augmenter la densité de puissance et le rendement des groupes motopropulseurs. Pour utiliser ces moteurs de nouveaux réducteurs mécaniques doivent être développés. Cela doit se faire sans générer de surcoût important face aux solutions utilisées à basse vitesse et en assurant un niveau de performance énergétique élevé. Cette thèse se situe en amont de la phase de conception d’un réducteur haute vitesse lubrifié par barbotage. Elle a pour

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Canovas, Lotthagen Zandra. "Defining, analyzing and determining power losses - due to icing on wind turbine blades." Thesis, Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-48251.

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The wind power industry is one of the fastest-growing renewable energy industries in the world. Since more energy can be extracted from wind when the density is higher, a lot of the investments made in the wind power industry are made in cold climates. But with cold climates come harsh weather conditions such as icing. The icing on wind power rotor blades causes the aerodynamic properties of the blade to shift and with further ice accretion, the wind power plant can come to a standstill causing a loss of power, until the ice is melted. How big these losses are, depend greatly on site-specific

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Brierley, Scott. "CALCULATING POWER SPECTRAL DENSITY IN A NETWORKBASED TELEMETRY SYSTEM." International Foundation for Telemetering, 2003. http://hdl.handle.net/10150/606738.

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International Telemetering Conference Proceedings / October 20-23, 2003 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>Calculating the power spectral density (PSD) at the transducer or data acquisition system offers advantages in a network-based telemetry system. The PSD is provided in real time to the users. The conversion to PSD can either be lossless (allowing a complete reconstruction of the transducer signal) or lossy (providing data compression). Post-processing can convert the PSD back to time histories if desired. A complete reconstruction of the signal is possible, includ

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32

Rajasekaran, Vinod. "Power delivery in systems with lossy cables or interconnects." Diss., Available online, Georgia Institute of Technology, 2003:, 2003. http://etd.gatech.edu/theses/available/etd-11252003-095456/unrestricted/rajasekaranvinod200312phd.pdf.

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Thesis (Ph. D.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2004.<br>Dr. Bonnie S. Heck, Committee Chair; David G. Taylor, Committee Member; Thomas. G. Habetler, Committee Member; Linda M. Wills, Committee Member; Eric Johnson, Committee Member. Includes bibliography.

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33

Jiao, Yang. "High Power High Frequency 3-level NPC Power Conversion System." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/56653.

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The high penetration of renewable energy and the emerging concept of micro-grid system raises challenges to the high power conversion techniques. Multilevel converter plays the key role in such applications and is studied in detail in the dissertation. The topologies and modulation techniques for multilevel converter are categorized at first by a thorough literature survey. The pros and cons for various multilevel topologies and modulation techniques are discussed. The 3-level neutral point clamped (NPC) topology is selected to build a 200kVA, 20 kHz power conversion system. The modularized ph

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van, der Walt Rhyno Lambertus Reyneke. "Photovoltaic based distributed generation power system protection." Diss., University of Pretoria, 2017. http://hdl.handle.net/2263/62807.

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In recent years, the world has seen a significant growth in energy requirements. To meet this requirement and also driven by environmental issues with conventional power plants, engineers and consumers have started a growing trend in the deployment of distributed renewable power plants such as photovoltaic (PV) power plants and wind turbines. The introduction of distributed generation pose some serious issues for power system protection and control engineers. One of the major challenges are power system protection. Conventional distribution power systems take on a radial topology, with c

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McDermott, Thomas E. "A Heuristic Nonlinear Constructive Method for Electric Power Distribution System Reconfiguration." Diss., Virginia Tech, 1998. http://hdl.handle.net/10919/30447.

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The electric power distribution system usually operates a radial configuration, with tie switches between circuits to provide alternate feeds. The losses would be minimized if all switches were closed, but this is not done because it complicates the system's protection against overcurrents. Whenever a component fails, some of the switches must be operated to restore power to as many customers as possible. As loads vary with time, switch operations may reduce losses in the system. Both of these are applications for reconfiguration. The problem is combinatorial, which precludes algorithms that

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36

Kolar, Sandra. "A Comparison of Wind Power Production with Three Different De- and Anti-Icing Systems." Thesis, Uppsala universitet, Elektricitetslära, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-254966.

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This thesis is done within the master program in energy systems engineering at Uppsala University and in cooperation with OX2. The aim was to compare the operation and performance of three different de- and anti-icing systems for wind turbines during the winter 2014/2015. The systems evaluated were de-icing with heating resistances, de-icing with warm air and anti-icing with heating resistances. Inconsistency in the operation of the wind turbines and the systems as well as lack of information made it hard to compare the efficiencies of the systems. The systems showed tendencies to improve the

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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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Terrier, Viktor. "North European Power Systems Reliability." Thesis, KTH, Elkraftteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-202581.

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The North European power system (Sweden, Finland, Norway, Denmark, Estonia, Latvia and Lithuania) is facing changes in its electricity production. The increasing share of intermittent power sources, such as wind power, makes the production less predictable. The decommissioning of large plants, for environmental or market reasons, leads to a decrease of production capacity while the demand can increase, which is detrimental to the power system reliability. Investments in interconnections and new power plants can be made to strengthen the system. Evaluating the reliability becomes essential to d

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Wong, Victor J. K. (Jack Keung). "Effects of capture, power loss factor, and variable transmit power level in multiple-access systems." Thesis, University of British Columbia, 1991. http://hdl.handle.net/2429/30121.

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The problem of data transmission in a slotted ALOHA system with one central base station and a number of mobiles is addressed. Of particular interest is the probability qi of successful packet reception ("capture") when i mobile users transmit in a given time slot. This probability depends on the propagation law, as well as fading, transmit power variations, spatial distribution and capture models. The capture probability in a noisy system is studied and the values of qi for large i appear to be independent of the noise level as long as the noise is reasonable (i.e. the normalized noise power

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Shimizu, H., Y. Yokomizu, T. Kato, et al. "Transmission loss of prospective power transmission model system integrated under superconducting environment." IEEE, 1997. http://hdl.handle.net/2237/6804.

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CARDENAS, SERGIO ALONSO ALVAREZ. "DISAGGREGATION POWER MODEL AND FLOWS AND LOSS ESTIMATION APPLIED FOR SUBTRANSMISSION SYSTEM." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2017. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=33988@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>PROGRAMA DE EXCELENCIA ACADEMICA<br>A estimação dos fluxos de potência e perdas técnicas nos sistemas de subtransmissão é um grande desafio para as distribuidoras pela importância no planejamento e operação do sistema. Por isso, surge a necessidade de contar com modelos que permitam simular estas grandezas, para o adequado planejamento do sistema. Neste trabalho é proposto e implementado um modelo de estimação de fluxos de potência e perdas técnicas em um sistema de subtransmis

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Öztürk, Esma. "WAKE INDUCED POWER DEFICIT ANALYSIS ON WIND TURBINES IN FORESTED MODERATELY COMPLEX TERRAIN USING SCADA DATA." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-346639.

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Over the last few decades, wind power has shown a continuous and significant developmentin the energy market globally. Having reached a certain level in both technologyand in dimensions, the role of optimizing wind turbines as well as wind farms hasbecome an additional aspect to future development and research. Since turbine wakescan cause significant power deficits within a farm, research in this area has the potentialfor large improvements in wind farm design. A wake is described as the downstream flow behind the rotor of an operating windturbine. The two main characteristics of wakes are a

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Ding, Qifeng. "Optimal meter placement and transaction-based loss allocation in deregulated power system operation." Texas A&M University, 2004. http://hdl.handle.net/1969.1/1475.

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In this dissertation topics of optimal meter placement and transaction-based loss allocation in deregulated power system operation are investigated. Firstly, Chapter II introduces the basic idea of candidate measurement identification, which is the selection of candidate measurement sets, each of which will make the system observable under a given contingency (loss of measurements and network topology changes). A new method is then developed for optimal meter placement, which is the choice of the optimal combination out of the selected candidate measurement sets in order to ensure the entire

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Tania, Mutmainna. "Wide Area Measurement Applications for Improvement of Power System Protection." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/19241.

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The increasing demand for electricity over the last few decades has not been followed by adequate growth in electric infrastructure. As a result, the reliability and safety of the electric grids are facing tremendously growing pressure. Large blackouts in the recent past indicate that sustaining system reliability and integrity turns out to be more and more difficult due to reduced transmission capacity margins and increased stress on the system. Due to the heavy loading conditions that occur when the system is under stress, the protection systems are susceptible to mis-operation. It is under

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Bouchard, Derrick Earl. "Towards loss minimization in power distribution systems using AI, the WatDist algorithm." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq21333.pdf.

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Lukman, Dedek Electrical Engineering &amp Telecommunications Faculty of Engineering UNSW. "Loss minimization in the modified algorithm of load flow analysis in industrial power system." Awarded by:University of New South Wales, 2002. http://handle.unsw.edu.au/1959.4/35453.

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The research looks at an alternative technique of loss minimization using B-loss formula in solving load flow analysis. A modeling of electrical system elements is first developed. A literature review on the history and development of load flow analysis and loss minimization especially on the use of B-loss formula are delivered. A report on load flow in practice and loss minimization measures based on a utility visit to EnergyAustralia is given. An analysis on three types of industrial power systems is also discussed. A substantial study on EDSA was made to adapt the commercial load flow progr

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Cheung, Grace M. "Development of an automated efficiency and loss measurement system for high-efficiency power converters." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/61150.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2010.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 105).<br>When building a high performance power converter system, characterization becomes a significant task in and of itself. This thesis addresses the development of an automated efficiency and loss measurement system for high-efficiency power converters. The design, construction, calibration, and evaluation of such a measurement setup is described, including development of software to control

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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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Kim, Alexander. "Switching-Loss Measurement of Current and Advanced Switching Devices for Medium-Power Systems." Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/34568.

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The ultimate goal for power electronics is to convert one form of raw electrical energy into a usable power source with the lowest amount of loss. A considerable portion of these losses are due to the use of switching devices themselves. Device losses can be apportioned to conduction loss and switching loss. It is commonly known and practiced that conduction loss can be reduced by driving MOSFETs and IGBTs harder with gate voltages closer to the maximum rating. This lowers the voltage across the device in the path of the amplified current and ultimately reduces power dissipated by the device.

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Taiby, Awrang. "WIDEBAND, LOW-LOSS, HIGH-POWER HANDLING DIPLEXER FOR AIRBORNE EARLY WARNING (AEW) SYSTEMS." DigitalCommons@CalPoly, 2012. https://digitalcommons.calpoly.edu/theses/745.

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Airborne Early Warning (AEW) systems rely on rotary couplers (RC) to interface rotating antenna elements on aircraft exteriors with stationary onboard systems. The demand for additional channels in new generation AEW systems increases the complexity of rotary couplers significantly. On the other hand, if signals in separate frequency bands use the same channel, existing AEW designs could incorporate additional channels with only minor changes. Passive RF diplexers can accomplish this task. Required characteristics include low-loss (<0.5dB), wideband (4.4:1), and high-power (>6kW) handling

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