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Tesi sul tema "Electric power"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Kulworawanichpong, Thanatchai. "Optimising AC electric railway power flows with power electronic control." Thesis, University of Birmingham, 2004. http://etheses.bham.ac.uk//id/eprint/4/.

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The latest generation of AC-fed traction drives, employing high-speed switching devices, is able to control the reactive power drawn from the overhead line by each equipment. If the conditions at each locomotive or train could be fed back to a central control point, it is possible for a centrally located controller to calculate optimal values for the reactive power in each drive and to send those commands back to the individual equipment. In this thesis, AC railway power flows are optimised in real time and the results are used to achieve some particular system objective via control of the PWM

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2

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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3

Valirad, sina, and Mahyar Parsasirat. "Iran's electric power system." Thesis, Blekinge Tekniska Högskola, Avdelningen för elektroteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-11227.

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Abstract Iran is a very vast country with about 80 million population that they are really fragmented. Providing electricitypower for all the society which is duty of power ministry of Iran according to the resources and facilities. The thesis gives an overview of production of electrical energy in Iran and how the production is divided ondifferent energy sources. At the present time there are 197 power plants are producing electricity to supportthe country that they are combination of 8 kind of different power plants which are thermal power plants, gaspower stations, combined cycles, hydro po

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4

Årdal, Frode. "International trade with electric power." Thesis, Norwegian University of Science and Technology, Department of Electrical Power Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-9821.

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<p>In 2003 the European Commission introduced the Directive 2003/54/EC and Regulation 1228/2003/EC which increased the focus on the liberalization of the European electricity market. The international electricity trade has increased and created new challenges related to cross-border transmission and compensation mechanisms. The focus of the report has been to discuss the development of the electricity market in Europe, and the status of international exchange. The report also discusses the concept of cross-border trade and transit, and investigates a proposed ITC model and whether correct in

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5

Moffatt, Robert Alexander. "Wireless transfer of electric power." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/51595.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2009.<br>Includes bibliographical references (leaf 49).<br>In this dissertation, I describe the design and construction of a system which can transfer electric power wirelessly. This is accomplished using inductive, near-field, non-radiative coupling between self-resonant copper helices. In our first experiment, we transfered 60W of power over a distance of 2m with 45% efficiency. In our second experiment, we designed a system which can transfer power from a single source to two devices, each 2m away, with 60% total effici

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6

Foo, Ming Qing. "Secure electric power grid operation." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/106964.

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Thesis: S.M., Massachusetts Institute of Technology, School of Engineering, Center for Computational Engineering, Computation for Design and Optimization Program, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 87-91).<br>This thesis examines two problems concerning the secure and reliable operation of the electric power grid. The first part studies the distributed operation of the electric power grid using the power flow problem, which is vital to the operation of the grid. The power flow problem is a feasibility problem for finding an assignment o

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7

Greenhalgh, Daniel. "Aerostat for electric power generation." Thesis, University of Southampton, 2017. https://eprints.soton.ac.uk/415870/.

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Solar power is one source of renewable energy that is well established but, in the UK, expensive per kilowatt due to low levels of insolation caused by cloud cover. To over- come the limitations of cloud cover, an aerostat for electrical power generation has been proposed in literature. The aerostat would float at an altitude of six kilometres, above the majority of cloud cover, and can receive around 3.3 times the annual insolation of a ground based system in the UK. The aim of this work is to further demonstrate the feasibility of such an aerostat concept. This is achieved by considering thr

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8

Redi, Stefano. "Aerostat for electric power generation." Thesis, University of Southampton, 2011. https://eprints.soton.ac.uk/390101/.

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The exploitation of renewable energy sources is currently at the top of the agenda of many governments that are required to face the problem of the rising energy demand. In particular photovoltaics is considered one of the most promising technologies to meet the energy needs in the long term. However the effective exploitation of this source has always been hindered in many northern countries (like the UK) due to the weather conditions which are detrimental for the efficiency of photovoltaic generators. As a possible solution to this problem, this research presents the preliminary concept eval

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9

Hawkins, Nigel Trevor. "On-line reactive power management in electric power systems." Thesis, Imperial College London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363434.

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10

St, Leger Aaron Nwankpa Chika O. "Power system security assessment through analog computation /." Philadelphia, Pa. : Drexel University, 2008. http://hdl.handle.net/1860/2815.

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11

Van, Greunen Corneluis Erasmus. "Neutral-point-clamped shunt active filter." Thesis, Link to the online version, 2005. http://hdl.handle.net/10019/1265.

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12

Tai, Sio Un. "Power quality study in Macau and virtual power analyzer." Thesis, University of Macau, 2012. http://umaclib3.umac.mo/record=b2586277.

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13

Nyman, Johan, and Amy Rankka. "Energy Efficient, Electric-Hydraulic Power Pack." Thesis, Linköpings universitet, Fordonssystem, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-119477.

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Along with increased oil prices and rising environmental issues, a demand for alternatives to combustion engine driven hydraulic applications has risen. In the field of mobile hydraulics, the hydraulic applications have traditionally been driven by the combustion engine of the vehicle on which they are mounted. By instead using a battery driven power pack the hydraulic application is able to operate without the engine running, saving fuel costs and reducing sound levels. In this thesis, the concept of using an electric-hydraulic power pack with a variable-speed electric motor and a fixed-displ

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14

El-Sedawi, I. R. M. "Hierarchical control for electric power systems." Thesis, City University London, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379642.

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15

Taylor, Joshua Adam. "Conic optimization of electric power systems." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/67601.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2011.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 103-115).<br>The electric power grid is recognized as an essential modern infrastructure that poses numerous canonical design and operational problems. Perhaps most critically, the inherently large scale of the power grid and similar systems necessitates fast algorithms. A particular complication distinguishing problems in power systems from those arising in other large infrastructures is the mathematical description

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16

Ashraf, Hafiz Farhan, and Shakeel Khan. "Analysis of Pakistan's Electric Power Sector." Thesis, Blekinge Tekniska Högskola, Avdelningen för elektroteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-11796.

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Pakistan is among some countries which has a lot of potential to produce electricity. The country is geographically very rich in terms of various renewable resources which are low costing to produce electricity and at the same time more environment friendly. But still from last 15 years Pakistan has a series of crises in power sector and there is a shortfall because electricity demand is growing day by day and the resources to produce electricity are not used efficiently. This study covers how the country is producing electricity from different available resources, furthermore to address how t

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17

Mude, Kishore Naik. "Wireless power transfer for electric vehicle." Doctoral thesis, Università degli studi di Padova, 2015. http://hdl.handle.net/11577/3424096.

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Wireless Power Transfer (WPT) systems transfer electric energy from a source to a load without any wired connection. WPTs are attractive for many industrial applications because of their advantages compared to the wired counterpart, such as no exposed wires, ease of charging, and fearless transmission of power in adverse environmental conditions. Adoption of WPTs to charge the on-board batteries of an electric vehicle (EV) has got attention from some companies, and efforts are being made for development and improvement of the various associated topologies. WPT is achieved through the affordabl

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18

Perdikakis, William S. "Electric Machine and Converter Power Sourcing Challenges of More Electric Aircraft." The Ohio State University, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1620676445543609.

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19

Lund, Richard. "Multilevel Power Electronic Converters for Electrical motor Drives." Doctoral thesis, Norwegian University of Science and Technology, Faculty of Information Technology, Mathematics and Electrical Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-687.

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<p>Power electronic converters are widely used in industrial power conversion systems both for utility and drives applications. As the power level increases, the voltage level is increased accordingly to obtain satisfactory efficiency. During the last years, the voltage rating of fast switching high voltage semiconductors such as the Insulated Gate Bipolar Transistor (IGBT) has increased. Still, there is a need for series connection of switching devices. In this area of applications, the Multilevel Converter has shown growing popularity.</p><p>The fundamental advantages of the Multilevel Conve

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20

Gous, Marthinus Gerhardus Faculin. "Shunt active power filtering algorithms for unbalanced, non-linear loads." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/53589.

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Thesis (MScEng)--University of Stellenbosch, 2003.<br>ENGLISH ABSTRACT: This thesis presents the design and implementation of shunt active power filtering algorithms for unbalanced, non-linear loads. A three-phase four-wire topology is developed in the dqO space. Based on this development an accurate dynamic system model, taking into account the effect of the neutral inductor is developed. The synchronous reference frame technique is expanded to enable the isolation of the zero sequence current component into its instantaneous active and reactive current components. Additionally a predi

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21

Doorduin, Riaan. "Electricity theft detection on a low voltage reticulation environment." Thesis, Stellenbosch : University of Stellenbosch, 2004. http://hdl.handle.net/10019.1/16310.

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Thesis (MScIng)--University of Stellenbosch, 2004.<br>ENGLISH ABSTRACT: Electricity theft in South Africa has become a major problem. This led to several developments from both industries and research institutes to counter these actions. Since equipment is already installed and major capital has been invested to provide electricity for a broad spectrum of consumers, the challenge is to find a low cost solution harnessing current investments and technology to detect electricity theft more accurately. This thesis investigates into the electricity theft topic. Two different methods, Time Dom

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22

Tong, Shiqiong Miu Karen Nan. "Slack bus modeling for distributed generation and its impacts on distribution system analysis, operation and planning /." Philadelphia, Pa. : Drexel University, 2006. http://hdl.handle.net/1860/1229.

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23

Cecchi, Valentina Miu Karen Nan. "A modeling approach for electric power transmission lines in the presence of non-fundamental frequencies/." Philadelphia, Pa. : Drexel University, 2008. http://hdl.handle.net/1860/2583.

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24

Yazdani, Atousa. "Energy and voltage management methods for multilevel converters for bulk power system power quality improvement." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2009. http://scholarsmine.mst.edu/thesis/pdf/Yazdani_09007dcc805c8ecd.pdf.

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Thesis (Ph. D.)--Missouri University of Science and Technology, 2009.<br>Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed February 18, 2009) Includes bibliographical references.

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25

Huss, William Reed. "Load forecasting for electric utilities /." The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487263399023837.

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26

Kaymaz, Pinar Valenzuela Jorge F. "Electric power generation expansion in deregulated markets." Auburn, Ala., 2007. http://repo.lib.auburn.edu/Send%2002-04-08/KAYMAZ_PINAR_52.pdf.

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27

Cheng, Fai-chut. "Analysis of electric fields in power cables /." [Hong Kong] : University of Hong Kong, 1989. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12736181.

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28

Kobziev, V., and E. Krasowski. "Some lines of energysaving in electric power industry." Thesis, ДРУКАРНЯ МАДРИД, 2016. http://openarchive.nure.ua/handle/document/8409.

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29

Yeoh, Seang Shen. "Control strategies for the More Electric Aircraft starter-generator electrical power system." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/34098/.

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The trend towards development of More Electric Aircraft (MEA) has been driven by increased fuel fossil prices and stricter environmental policies. This is supported by breakthroughs in power electronic systems and electrical machines. The application of MEA is expected to reduce the aircraft mass and drag, thereby increasing fuel efficiency and reduced environmental impact. The starter-generator (S/G) scheme is one of the solutions from the MEA concept that brings the most significant improvement to the electrical power generation system. A S/G system is proposed from the possible solutions br

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30

Pagonis, Meletios. "Electrical power aspects of distributed propulsion systems in turbo-electric powered aircraft." Thesis, Cranfield University, 2015. http://dspace.lib.cranfield.ac.uk/handle/1826/9873.

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The aerospace industry is currently looking at options for fulfilling the technological development targets set for the next aircraft generations. Conventional engines and aircraft architectures are now at a maturity level which makes the realisation of these targets extremely problematic. Radical solutions seem to be necessary and Electric Distributed Propulsion is the most promising concept for future aviation. Several studies showed that the viability of this novel concept depends on the implementation of a superconducting power network. The particularities of a superconducting power networ

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31

Mesgarpour, Tousi Maryam. "Electric Field Grading and Electrical Insulation Design for High Voltage, High Power Density Wide Bandgap Power Modules." Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/100621.

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The trend towards more and all-electric apparatuses and more electrification will lead to higher electrical demand. Increases in electrical power demand can be provided by either higher currents or higher voltages. Due to "weight" and "voltage" drop, a raise in the current is not preferred; so, "higher voltages" are being considered. Another trend is to reduce the size and weight of apparatuses. Combined, these two trends result in the high voltage, high power density concept. It is expected that by 2030, 80% of all electric power will flow through "power electronics systems". In regards to th

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32

Alvarez, Rogelio E. "Interdicting electrical power grids." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Mar%5FAlvarez.pdf.

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Thesis (M.S. in Operations Research)--Naval Postgraduate School, March 2004.<br>Thesis advisor(s): Javier Salmeron, R. Kevin Wood. Includes bibliographical references (p. 69-70). Also available online.

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33

da, Silva Larsson Stefan. "Electric quality measurements and analysis of the electric power net at Händelöverket." Thesis, Linköpings universitet, Institutionen för teknik och naturvetenskap, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-96301.

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Electric quality is a common concept for a energy delivery without interference. In time with he development of the technology which produce more complex devices connected to the lectric mains increase the demands on a electric delivery without interference. The purpose ith this report was to investigate the electric quality to chosen places at the combined power nd heating plant of E.ON in Händelö. The degree thesis is performed at the company ES lektroSandberg which have their manning/crew at Händelö. From the analyse it was suppose o show the result and give proposal to any problem that may

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34

鄭輝質 and Fai-chut Cheng. "Analysis of electric fields in power cables." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1989. http://hub.hku.hk/bib/B31209142.

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35

Chen, Chuen-Song. "On-chip current and power measurement techniques for integrated circuits with regulated power /." View online ; access limited to URI, 2008. http://0-digitalcommons.uri.edu.helin.uri.edu/dissertations/AAI3314451.

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36

Victor, Eric L. "Thermal analysis of PANSAT electric power subsystem." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA283417.

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37

Holmgren, Åke. "Vulnerability analysis of electric power delivery networks." Licentiate thesis, KTH, Land and Water Resources Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-1738.

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<p>Disturbances in the services provided by the infrastructuresystemse.g. electric power supplies and communicationscan have serious implications for everyday life,economic prosperity and national security. The disturbances canbe initiated by natural disasters, adverse weather, technicalfailures, human errors, sabotage, terrorism or acts of war. Theaim of this thesis is to study methods for proactivevulnerability analysis of electric power delivery networks(i.e. to analyze their sensitivity to threats and hazards), andto formalize vulnerability as a theoretical concept.</p><p>The thesis cons

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38

Novik, Frode Karstein. "Power system for electric heating of pipelines." Thesis, Norwegian University of Science and Technology, Department of Electrical Power Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-8936.

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<p>Direct electrical heating (DEH) of pipelines is a flow assurance method that has proven to be a good and reliable solution for preventing the formation of hydrates and wax in multiphase flow lines. The technology is installed on several pipelines in the North Sea and has become StatoilHydros preferred method for flow assurance. Tyrihans is the newest installation with 10 MW DEH for a 43 km pipline. However, the pipeline represents a considerable single-phase load which makes the power system dependent on a balancing unit for providing symmetrical conditions. This limits the step out distanc

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39

Holmgren, Åke J. "Quantitative vulnerability analysis of electric power networks." Doctoral thesis, KTH, Transporter och samhällsekonomi, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3969.

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Disturbances in the supply of electric power can have serious implications for everyday life as well as for national (homeland) security. A power outage can be initiated by natural disasters, adverse weather, technical failures, human errors, sabotage, terrorism, and acts of war. The vulnerability of a system is described as a sensitivity to threats and hazards, and is measured by P (Q(t) > q), i.e. the probability of at least one disturbance with negative societal consequences Q larger than some critical value q, during a given period of time (0,t]. The aim of the thesis is to present meth

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Fotuhi-Firuzabad, Mahmud. "Operating health analysis of electric power systems." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0012/NQ27407.pdf.

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Holmgren, Åke J. "Quantitative vulnerability analysis of electric power networks /." Stockholm : Division of Safety Research, Royal Institute of Technology, 2006. http://www.diva-portal.org/kth/theses/abstract.xsql?dbid=3969.

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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 dat

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FACEROLI, SILVANA TEREZINHA. "SIMULATOR FOR ELECTRIC POWER NETWOKS TRANSIENT ANALYSIS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2002. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=2754@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>Muitas das atuais técnicas de simulação de redes elétricas de potência são baseadas em plataformas computacionais do tipo EMTP. Basicamente, este método de simulação transforma os componentes elétricos a parâmetros concentrados e a topologia da rede em um procedimento matemático recursivo. Para cada nova iteração, a solução da rede é estimada como uma função de estados prévios e valores de entrada atuais. Passos de integração pequenos geram soluções precisas por estender a banda de freqüências representada. No entanto, i

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Leung, Tommy (Tommy Chun Ting). "Coupled natural gas and electric power systems." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/98547.

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Thesis: Ph. D., Massachusetts Institute of Technology, Engineering Systems Division, 2015.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 235-240).<br>Scarce pipeline capacity in regions that rely on natural gas technologies for electricity generation has created volatile prices and reliability concerns. Gas-fired generation firms uniquely operate as large consumers in the gas market and l

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McCoy, Timothy J. (Timothy John). "Dynamic simulation of shipboard electric power systems." Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/12495.

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46

Singhavilai, Thamvarit. "Identification of electric power system dynamic equivalent." Thesis, University of Strathclyde, 2011. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=15647.

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47

Kamanzi, Janvier. "Thermal electric solar power conversion panel development." Thesis, Cape Peninsula University of Technology, 2017. http://hdl.handle.net/20.500.11838/2527.

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Thesis (DTech (Engineering))--Cape Peninsula University of Technology, 2017.<br>The world has been experiencing energy-related problems following pressuring energy demands which go along with the global economy growth. These problems can be phrased in three paradoxical statements: Firstly, in spite of a massive and costless solar energy, global unprecedented energy crisis has prevailed, resulting in skyrocketing costs. Secondly, though the sun releases a clean energy, yet conventional plants are mainly being run on unclean energy sources despite their part in the climate changes and global war

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Fomina, Olena Volodymirivna, and Olena Ihorivna Hnasko. "Cost management of Ukrainian electric power companies." Thesis, National Aviation University, 2021. https://er.nau.edu.ua/handle/NAU/53947.

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1. National accounting standard 16 “Costs”. URL: https://zakon.rada.gov.ua; 2. Rymar T.M. Cost management strategy of energy companies in the process of technical re-equipment. Bulletin of the National University “Lviv Polytechnic”. Problems of economics and management. № 484. 2003. P. 361 – 366; 3. Azhnakin S.H. The problems of energy saving and energy efficiency of electric power companies’ operations. Economic innovations. № 55. 2013. P.9 – 22; 4. Germany’s onshore wind expansion continues to struggle. URL: https://www.euractiv.com; 5. Fomina O.V. Managerial accounting

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Kryukova, N. V., Evgen Viktorovych Goncharov, and I. V. Polyakov. "Modern monitoring systems of electric power lines." Thesis, NTU "KhPI", 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/38909.

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Ojha, Abhi. "Coupled Natural Gas and Electric Power Systems." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/78666.

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Abstract (sommario):

Decreasing gas prices and the pressing need for fast-responding electric power generators are currently transforming natural gas networks. The intermittent operation of gas-fired plants to balance wind generation introduces spatiotemporal fluctuations of increasing gas demand. At the heart of modeling, monitoring, and control of gas networks is a set of nonlinear equations relating nodal gas injections and pressures to flows over pipelines. Given gas demands at all points of the network, the gas flow task aims at finding the rest of the physical quantities. For a tree network, the problem enjo

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