Tesi sul tema "Electrical power plant"
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SILVA, FRANCISCO CARLOS SANTANNA DA. "ACTUAL REACTIVE POWER CAPABILITY EVALUATION IN AN ELECTRICAL POWER PLANT". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2002. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=2472@1.
As curvas de capacidade de geração de potência reativa fornecidas pelos fabricantes são elaboradas em função dos parâmetros de projeto do gerador, e geralmente não consideram as condições de operação da planta e do sistema como fatores limitantes. É sabido que as condições de operação da planta, tais como tensões nominais do terminal do gerador e das barras auxiliares, valores limites dos reguladores de tensão, potência máxima da turbina e dispositivos de limitação e proteção de sub e sobreexcitação podem ser fatores limitantes da capacidade de geração e absorção de potência reativa. Neste trabalho foi elaborado um método e desenvolvida uma ferramenta computacional para identificar a curva de capacidade real de geração de potência reativa para qualquer ponto de operação. Este trabalho pode ser estendido para qualquer gerador, conhecidas as características da usina. Nos estudos de caso apresentados pôde-se verificar que é possível ampliar a capacidade de geração reativa da usina apenas conhecendo seus reais limites, não necessitando portanto, de grandes investimentos para o aumento dessa capacidade.
They show that different generator loads produce greater heating in different parts of generator. A method is described and a software is presented to evaluate the actual reactive power capability curve considering the operating condition.This paper shows that it is possible to enlarge the reactive power capability only by knowing the actual capability limitations, without raising costs and keeping operation safe.It is important to the generator agent to know its capabilities if it is desidered to provide reactive support as an ancillary service in the new competitive environment.
Chan, Lai Cheong. "Investigation on energy efficiency of electrical power system in Macau Coloane power plant". Thesis, University of Macau, 2012. http://umaclib3.umac.mo/record=b2586280.
Boesak, Dawid John Johannes. "Voltage stability analysis of a power system network comprising a nuclear power plant". Master's thesis, Faculty of Engineering and the Built Environment, 2018. http://hdl.handle.net/11427/30056.
Claassens, Andries Johannes. "Transient modelling of induction motors in a petrochemical plant using Matlab". Thesis, Stellenbosch : Stellenbosch University, 2008. http://hdl.handle.net/10019.1/20432.
ENGLISH ABSTRACT: The behaviour of induction motors at a petrochemical plant under transient conditions was investigated with the view to improve plant immunity to voltage fluctuations. The benefits of using a phase-variable induction motor model rather than the simpler d-q models usually employed are investigated. A simplified model of the plant electrical distribution system was derived. Phase variable and d-q induction motor models were implemented as well as a synchronous generator model. Practical considerations precluded the use of commercial software for the simulation of transient conditions and a basic simulation program was developed using Matlab to evaluate the behaviour of the dynamic machine models and distribution system. It was established that the configuration of the installed re-acceleration system can be optimised to reduce the possibility of plant outages as a result of voltage fluctuations. It was found that the use of more detailed induction machine models provide valuable insight into system behaviour and is justified if accurate motor parameters are available or can be estimated. The simplified plant model yielded useful results and enabled the identification of incorrect system data. The investigation showed that Matlab is suitable for the rapid development of a basic transient simulation program that can be used to study the behaviour of different interconnected dynamic machine models.
AFRIKAANSE OPSOMMING: Die gedrag van induksiemotors in 'n petrochemiese aanleg onder oorgangstoestande is ondersoek ten einde die immuniteit van die aanleg vir spanningsfluktuasies te verbeter. Die voordele van die gebruik van 'n fase-veranderlike induksiemotor model eerder as die eenvoudiger d-q modelle wat normaalweg gebruik word is ondersoek. 'n Vereenvoudigde model van die aanleg se elektriese distribusiestelsel is afgelei. Faseveranderlike en d-q induksiemotor modelle is geimplementeer sowel as 'n sinkroongenerator model. Praktiese oorwegings het die gebruik van kommersiële programmatuur vir die simulasie van oorgangstoestande verhoed en 'n basiese program is in Matlab ontwikkel om die gedrag dinamiese masjienmodelle en die distribusiestelsel te evalueer. Daar is vasgestel dat die konfigurasie van die geinstalleerde herversnellerstelsel geoptimeer kan word om die moontlikheid van aanleg onderbrekings as gevolg van spanningsfluktuasies te verminder. Daar is gevind dat die gebruik van meer gedetaileerde induksiemasjien modelle waardevolle insig in die gedrag van die stelsel lewer en geregverdig is indien akkurate motorparameters beskikbaar is of afgeskat kan word. Die vereenvoudigde model van die aanleg het bruikbare resultate gelewer en die het die identifikasie van foutiewe stelseldata moontlik gemaak. Die ondersoek het getoon dat Matlab geskik is vir die snelle ontwikkeling van 'n basiese oorgangsimulasie program wat gebruik kan word om die gedrag van verskillende gekoppelde dinamiese masjienemodelle te bestudeer.
Al-Hamdan, Qusai Zuhair Mohammed. "Design criteria and performance of gas turbines in a combined power and power (CPP) plant for electrical power generation". Thesis, University of Hertfordshire, 2002. http://hdl.handle.net/2299/14041.
Al-Hajri, Muhammad T. "Electrical power energy optimization at hydrocarbon industrial plant using intelligent algorithms". Thesis, Brunel University, 2016. http://bura.brunel.ac.uk/handle/2438/12681.
Emmanuel, Paul. "Investigation into transient stability of a nuclear power plant using DIgSILENT". Master's thesis, University of Cape Town, 2016. http://hdl.handle.net/11427/20322.
Lilje, Peter. "Stabilising an islanded nuclear power plant with a high- energy resistor". Doctoral thesis, University of Cape Town, 2009. http://hdl.handle.net/11427/5298.
Qur'an, Omar Ali Sammour. "Design criteria and performance of steam turbines in a CPP plant for electrical power generation". Thesis, University of Hertfordshire, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.247306.
Rico, Melgoza J. Jesús. "Steady state modelling of non-linear power plant components". Thesis, University of Glasgow, 1997. http://theses.gla.ac.uk/5319/.
Meadowcroft, Brian K. "Hidden Failures in Shipboard Electrical Integrated Propulsion Plants". Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/42754.
Master of Science
Goree, Adam Tracker. "Grounding design for personal safety of a large scale wind power plant". Thesis, Colorado School of Mines, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10164243.
Grounding of electrical power systems has and will always be one of the most essential aspects of any electrical system design. Without a proper, well designed and effective efficient grounding network personal safety is at risk, equipment protection cannot be assured, and proper system operation cannot be maintained. Because of these reasons grounding design has become well researched, with long established standards strictly dictating the construction and integration of such ground networks. However with an ever diversifying power grid generation mix, integration of new technologies has become common. The need for these diverse technologies along with their cultural and societal demand has enabled them to outrun the standards and conceptual knowledge required for their safe construction. One such area exists in the grounding design of large scale Wind Power Plants (WPP). While most generation facilities aim to reduce their landmass to the smallest possible footprint wind power plants require adequate spacing in order to optimize wind quality and power generation with construction costs. This necessitates a generation facility or power plant that can reach up to several square miles. At areas of this size and distribution, established grounding design practices become ineffective and inapplicable while current standards become insufficient due to failing assumptions.
This thesis offers an overview of grounding concepts tailored to the unique requirements of Wind Power Plants, a discussion concerning the recommended design methodology for such a network, and real world simulations of these problematic scenarios as a basis of study for WPP grounding. Currently there is very little literature and no standard or guidelines in industry for the specific challenges posed by WPP grounding. Lack of this documentation has led to debate in industry over the topic. It is hoped that this research will provide a basic WPP grounding design methodology and demonstrate the need for the further creation of a standard or guide.
Kariuki, Kibaara Samuel. "Technical and economic analysis of parabolic trough concentrating solar thermal power plant". Master's thesis, University of Cape Town, 2012. http://hdl.handle.net/11427/11929.
Includes bibliographical references.
This thesis reports on the technical and economic analysis of wet and dry cooling technologies of parabolic trough CSTP plant. This was done through modelling and simulation of a standalone and grid connected parabolic trough using the System Advisor Model (SAM).
Mthwecu, Sabatha. "Modelling and macroeconomic analysis of a Solar PV/diesel hybrid power plant". Master's thesis, University of Cape Town, 2015. http://hdl.handle.net/11427/13729.
Sharifnia, Hamidreza. "Safety related model and studies of Trojan Nuclear Power Plant electrical distribution system". PDXScholar, 1988. https://pdxscholar.library.pdx.edu/open_access_etds/3875.
Ercan, Noyan. "A Decision Support Tool For Feasibility Assessment Of Hydro Electrical Power Plant Projects". Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613982/index.pdf.
Hassan, Mohamed Elhafiz. "Power Plant Operation Optimization : Unit Commitment of Combined Cycle Power Plants Using Machine Learning and MILP". Thesis, mohamed-ahmed@siemens.com, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-395304.
Ishaque, Mohammed. "A new method for calculating the economic benefits of varying degrees of power factor correction for industrial plant loads". PDXScholar, 1992. https://pdxscholar.library.pdx.edu/open_access_etds/4322.
Amba, Harsha Vardhan. "Operation and Monitoring of Parabolic Trough Concentrated Solar Power Plant". Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/5891.
Draganescu, Mihai. "Study of supercritical coal-fired power plant dynamic responses and control for grid code compliance". Thesis, University of Warwick, 2015. http://wrap.warwick.ac.uk/73963/.
Le, Louarn Theobald. "Optimization Of A Virtual Power Plant In The German Electricity Market". Thesis, KTH, Elkraftteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-217380.
Distribuerade energik¨allor blir allt viktigare i det tyska eln¨atverket. En l¨osning f¨or atthantera det v¨axande antalet distribuerade tillg°angar ¨ar Virtual Power Plant-konceptet.Ett virtuellt kraftverk styr decentraliserade generatorer och laster f¨or att efterlikna ettnormalt kraftverk. Baserat p°a ny teknik anv¨ander det avancerad kommunikationsteknikf¨or att tillhandah°alla olika tj¨anster (generering av energi, styrning av kraftsystem, balanseringstj¨anster ...). Denna avhandling f¨oresl°ar en stokastisk blanda heltalsmodell avett virtuellt kraftverk. Deltagandet i olika produkter studeras: F¨ors¨aljning av maktp°a daglig basis p°a spotmarknaden, vilket ger flexibilitet till den sekund¨ara och terti¨arareservmarknaden. Det speciella med denna modell ¨ar att den tar h¨ansyn till de int¨aktersom genereras av den stokastiska aktiveringen av reservmarknaden. Ett operationsverktygmed namnet AlocaBid implementeras i Python, baserat p°a den utvecklade matematiskamodellen. Modellens prestanda utv¨arderas med fyra studiefall, som representerartypiska marknadssituationer. Resultaten visar f¨ordelen med den f¨oreslagna modelleframf¨or den senaste tekniken f¨or budgivningens f¨ordelning.
Mohamed, Omar R. Ibrahim. "Study of energy efficient supercritical coal-fired power plant dynamic responses and control strategies". Thesis, University of Birmingham, 2012. http://etheses.bham.ac.uk//id/eprint/3662/.
Suliman, Ahmad. "A test case for implementing feedback control in a micro hydro power plant". Kansas State University, 2010. http://hdl.handle.net/2097/6847.
Department of Electrical and Computer Engineering
Dwight D. Day
Micro-hydro turbines generate power for small villages and industries in Afghanistan. They usually produce less than 100 kW of power. Currently the flow into the turbine is controlled manually and the voltage is controlled automatically with an electronic load controller. Excess power not used by the village is dumped into a community water heater. For larger sites that have a reservoir and/or large variable load throughout the day and night, the turbine needs to be fitted with an automatic flow control system to conserve water in the reservoir or deal with the variable loads. Large turbines usually use hydraulic governors that automatically adjust the flow of water into the turbine. For micro-hydro sized plants this method would be too expensive and be difficult to build and maintain locally. For this reason, a 3 phase AC induction motor will be used to move the internal flow control valve of the turbine. Because a sudden change in load is possible (30 – 40%) for micro-hydro plants, the electronic load controller will also be needed to respond to quick changes in load so that the village voltage does not exceed 220V. This report documents the process of building a test system comprising of a dynamic resistive load, microcontroller controlled resistive load, a three phase AC generator and a DC Motor. Where the dynamic resistive load represents the load of the village, the computer controlled resistive load would represent the community water heater, the three phase AC generator represents the Generator on site and the DC Motor together with its DC input voltage would emulate the turbine and its water flow respectively. The DC input voltage would be also controlled with a PWM signal through a delay loop to represent the water gate delay effects on the turbine as close as possible. With this, it would be possible to completely build and test a control system that emulates the dynamics of a water turbine generator.
SILVA, BRUNO NOGUEIRA. "SET UP OF A FORECASTING MODEL FOR ELECTRICAL ENERGY SPOT PRICES IN BRAZIL AND VALUATION OF A THERMOELECTRICAL POWER PLANT USING REAL OPTIONS MODEL". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2001. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=1941@1.
O Setor de energia elétrica no Brasil vem sofrendo fortes mudanças estruturais, cujo principal objetivo é criar um caráter competitivo para permitir ao setor crescer não mais por investimentos estatais, mas sim pelas mãos do capital privado. Com isso, espera-se que a oferta possa acompanhar a demanda crescente nos últimos anos, devido a falta de investimentos no setor, e fazer com que o risco de déficit de carga no futuro diminua. O Programa Prioritário de Termelétricas, lançado pelo governo federal, vai aumentar a oferta de energia no país com a construção de usinas termelétricas, aproveitando o fato da disponibilidade de gás natural existente, e com isso aumentará a participação de geração térmica na matriz energética brasileira. Essa mudança vai conferir mais confiabilidade ao parque gerador de energia, diminuindo o risco de déficit energético pela redução do nível de água dos reservatórios das usinas hidrelétricas. Além disso, as usinas termelétricas são uma alternativa de curto prazo para o Brasil, pois devido ao reduzido prazo de construção, permitiria o aumento da oferta durante a transição para o mercado competitivo, minimizando com isso os riscos de déficit no futuro. As termelétricas, nessa nova estrutura do setor elétrico brasileiro, podem se declarar flexíveis ou inflexíveis. Uma termelétrica flexível é aquela onde sua energia pode ser comercializada no Mercado Atacadista de Energia (MAE), logo ficando sujeita a volatilidade do mercado spot, mas podendo obter grandes lucros. Uma termelétrica inflexível é aquela onde toda sua energia é comercializada mediante contratos bilaterais, ou seja, a energia gerada não é comercializada no MAE. Isto reduz as incertezas, mas também reduz as oportunidades de grandes lucros. A maior incerteza de um projeto do setor elétrico brasileiro é o preço da energia elétrica que em países onde este setor foi reestruturado, como o Brasil, é determinado através do custo marginal de curto prazo (CMCP), por um modelo de otimização energética não publicado ao mercado. Em vista disso, essa dissertação se propõe a formular um modelo para os preços de energia elétrica no Brasil, avaliar uma planta de geração térmica utilizando a Teoria de Opções Reais aliada a técnica de simulação de Monte Carlo e comparar os resultados com os obtidos por Alessandro de Lima Castro em sua dissertação de Mestrado defendida em abril de 2000 cujo título é Avaliação de Investimento de Capital em Projetos de Geração Termoelétrica no Setor Elétrico Brasileiro Usando Teoria das Opções Reais.
The Brazilian Electricity Sector has experienced strong structural changes, whose main objective is to create a competitiveness character to allow for the sector to grow not more for state investments, but now for the hands of the private capital. So, it is expected that supply can meet the growing demand in the last years, due to the lack of investments in the sector, and consequently reduce the risk of load deficit in the future. The Emergency Program of Thermal Plants, introduced by the federal government, will increase the offer of energy in the country with the construction of thermal plants, taking advantage of the availability of natural gas, and thus, will increase the participation of thermal generation in Brazil. That change will give more reliability to the Brazilian Electric System, reducing the risk of energy deficit due to the reduction of the level of water in the reservoirs of the hydro plants. Besides, thermal plants is a short-term alternative to Brazil, because its construction term is shorter than that of hydro plants, so this will increase the offer of energy during the transition for the competitive market, and so reducing the risk of load deficit in the future. Thermal Plants, in that new structure of the Brazilian Electric Sector, can be declared flexible either or inflexible. A flexible thermal plant is that where its energy can be negotiated in a WholeSale Energy Market, and so being subjects the volatility of the spot market, but it could obtain great profits. An inflexible thermal plant is that where its whole energy is negotiated by through bilateral contracts, that is, the energy generated is not negociated in the WholeSale Energy Market. This reduces uncertainties, but it also reduces the opportunities of great profits. The largest uncertainty of a project of the Brazilian electric sector is the price of electricity, and in countries where this sector was restructured, like in Brazil, it is determined through the short run marginal cost (SRMC), for energetic otimization model not published to the market. Thus, this dissertation intends to formulate a model for the price of electricity in Brazil, to evaluate a thermal plant using Real Options Theory and Monte Carlo simulation, and to compare the results with CASTRO´s dissertation: Evaluation of Capital Investment in Thermoelectric Generation Projects in the Brazilian Electricity Sector Using Real Options Theory.
El Sector de energía eléctrica en Brasil ha sufrido fuertes cambios extructurales, con el objetivo de crear un carácter competitivo que permita el crecimiento de este sector, en manos del capital privado y no más por inversiones estatales. Con esto, se espera que la oferta consiga acompañar la demanda cresciente en los últimos años, debido a la falta de inversiones en el sector, y conseguir que el riesgo de déficit de carga en el futuro disminuya. El Programa Prioritario de Termoeléctricas, lanzado por el gobierno federal, pretende aumentar la oferta de energía en el país con la construcción de centrales termoeléctricas, aprovechando la disponibilidad de gas natural existente. Como consecuencia aumentará la participación de la generación térmica en la matriz energética brasilera. Este cambio dará mayor confiabilidad al parque generador de energía, diminuyendo el riesgo de déficit energético por la reducción del nível de agua de los depósitos de las centrales hidroeléctricas. Además, las centrales termoeléctricas constituyen una alternativa de corto plazo para Brasil que, gracias al reducido plazo de construcción, permitiría el aumento de la oferta durante la transición para el mercado competitivo, minimizando así, los riesgos de déficit en el futuro. Las termoeléctricas, en esta nueva extructura del sector eléctrico brasilero, pueden declararse flexibles o inflexibles. Em una termoeléctrica flexible la energía puede ser comercializada en el Mercado Atacadista de Energía (MAE), sujetándose a la volatilidad del mercado spot, pero pudiendo obtener grandes lucros. Una termoeléctrica inflexível comercializa toda su energía mediante contratos bilaterales, o sea, la energía generada no se comercializa en el MAE. Esto reduce los riesgos, pero también reduce las oportunidades de grandes lucros. El mayor riesgo de un proyecto del sector eléctrico brasilero es el precio de la energía eléctrica que, en países donde este sector fue reextructurado, (como en Brasil) se determina a través del costo marginal de corto plazo (CMCP); a través de un modelo de optimización energética no publicado al mercado. Esta disertación se propone formular un modelo para los precios de energía eléctrica en el Brasil, evaluar una planta de generación térmica utilizando la Teoría de Opciones Reales aliada a la técnica de simulación de Monte Carlo; y comparar nuestros resultados con los obtenidos por Alesandro de Lima Castro en su disertación de Mestrado defendida en abril de 2000 bajo el título Evaluación de Inversión de Capital en Proyectos de Generación Termoeléctrica en el Sector Eléctrico Brasilero Usando Teoría de las Opciones Reales.
Malevanovas, Rimantas. "Saulės elektrinės parametrų stebėjimo įrenginys. Bakalauro darbas". Bachelor's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140716_102900-72939.
The objective of bachelor’s project was to design, build and test prototype of a Solar Power Plant Monitoring system. Two hardware pieces and two software (monitoring program for PC and firmware for hardware) items were designed. System is based on AtMega168 microcontroller collecting data from via SPI bus attached measurement device and transmitting collected data to PC software via LAN for processing, displaying and saving the data. PC software works as dual server: receives data from hardware using and, in separate process, services requests from internet users, returning webpage template with most recent processed data.
Macháč, Petr. "Výpočet ustáleného chodu sítě 110 kV". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220676.
Borges, Rafael Cruz. "Um algoritmo para sintonia de controladores robustos para amortecimento de modos intra-planta em sistemas de potência". Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/18/18154/tde-10082009-114735/.
The problem of intra-plant modes is characterized by the oscillation of the machines within a power station against each other. These modes are usually well-damped, but improper settings for the parameters for power system stabilizers (PSSs), aiming at enhancing the damping of local modes, for example, can reduce the damping of the intra-plant modes. This possibility must be avoided by a careful tuning of the stabilizers, over a model that is able to represent the intra-plant modes. This tuning process may be involved and time-consuming, requiring many hours of work from a specialist. In this paper, we present a computerized algorithm that is capable of performing this process with minimum intervention of the human designer (therefore alleviating the burden of PSS tuning for the engineer and placing most of it on the computer) and apply it to find a PSS tuning to damp both local and intra-plant modes of the same plant. As shown in the paper, the algorithm is capable of tuning PSSs for several operating conditions at once, which may also result in better tuning when compared to sequential approaches.
GROULT, Mathieu. "Optimization of Electromechanical Studies for the Connection of Hydro Generation". Thesis, KTH, Elkraftteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-221802.
Den nuvarande elproduktionsmodellen baseras på kraftverk som är direktkopplade till stamnätet. Stamnätet i sin tur matar distributionsnätet som därefter levererar el till slutkonsumenterna. För att säkerställa stamnätets integritet samt säkerhet och undvika strömavbrott kvantifieras prestandan hos varje generator som är ansluten till det med hjälp av nätkoder. När det gäller det franska stamnätet skrivs prestandakraven i ett dokument som utfärdas av den franska transmissionssystemoperatören (TSO). Olika händelser med olika anslutningskonfigurationer måste simuleras där dess prestanda ska utvärderats. Syftet med dessa simuleringar är att identifiera stabiliteten vid varje elproduktionsenhet med bl. a. dess reaktionstid för den aktiva effekten efter kortslutningar.Med tanke på antalet generatorer som är anslutna till stamnätet framträder ett behov för överföringsoptimering vilket är syftet med detta examensarbete. För att utföra dessa simuleringar på ett effektivt sätt på alla generatorer som ägs av den ledande franska elproducenten, EDF, bidrar denna avhandling med ett verktyg som heter AuDySim kodat i mjukvarorna MATLAB och EUROSTAG. Verktyget gör det möjligt för användaren att konfigurera en elproduktionsenhet innan man utför alla simuleringar som specificeras av TSO:n och samtidigt producerar en rapport som innehåller grafisk- och data resultat. Både simuleringar och rapporten produceras automatiskt för att optimera en bearbetningstid och resursanvändning.För att validera verktygets prestanda utförs två fallstudier på olika typer av kraftverk. De två fallstudierna fokuserar på ett hydraulisk- respektive ett kärnkraftverk. I resultaten utvärderas prestanda för varje typ av kraftverk, med fokus på maskinens rotorvinkelstabilitet och andra viktiga faktorer, såsom spänning och aktiv effekt. Resultat leder till slutsatsen att AuDySim uppfyller sitt uppdrag genom att automatiskt analysera prestanda hos en elektrisk generationsenhet och presentera analysen i en rapport.
Kapusto, Rimas. "Mažosios vėjo jėgainės tyrimas". Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140617_111846-15327.
Survey energy characteristics of little capacity horizontal axis wind power plant and identify efficiency increase potential.
Dembinskas, Donatas. "Kogeneracinės jėgainės elektrotechninė dalis". Bachelor's thesis, Lithuanian Academic Libraries Network (LABT), 2011. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2011~D_20110804_093038-46733.
Cogeneration technologically advanced of heat and electricity production. It is particularly relevant for Lithuania, because there exists a strong need for heat production, the restructuring of heat and electricity networks, is changing its legal framework, the development of market relations. Undergraduate work is designed combined heat and power plant. Cogeneration plant will be used for alternative fuel: biogas which derived from the landfill. However, in order to improve the efficiency of cogeneration landfill gas is mixed with natural gas in certain proportion. Combined heat and power plant is designed according to the Republic of Lithuania laws and regulations. Heat comes from cogeneration emissions into the atmosphere in summer. It was found that in order to increase the heat recovery efficiency, not only in winter but in summer, for example to be equipped with heated vegetable production complexes.
Razyapova, Aygul. "Tvorba a estimace modelu malé vodní elektrárny v programu PSCAD". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-242038.
Rader, Jordan D. "Loss of normal feedwater ATWS for Vogtle Electric Generating Plant using RETRAN-02". Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31741.
Committee Chair: Abdel-Khalik, Said I.; Committee Member: Ghiaasiaan, S. Mostafa; Committee Member: Hertel, Nolan E. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Iindombo, Julia Dimbulukweni. "Efficiency plan for large interconnected urban ring main network under contingency conditions". Thesis, Cape Peninsula University of Technology, 2011. http://hdl.handle.net/20.500.11838/1185.
In a situation, where there is a shortage of power generation or the power stations are operating with a very low reserve margin, as is typically the current position in South Africa, there is a need to operate distribution network at the highest possible efficiency by utilising network power loss reduction techniques. Such techniques are especially important when contingencies occur as they tend to increase loss, reduce efficiencies and cause power supplies to such networks to increase. This increase can cause the network or multiples of such networks to be load shed as the power stations do not have the reserve margins to meet this increased demand. The ideal situation would thus be to minimise network loss and in so doing decrease the amount of power needed and possibly avoid load shedding. Thus, there is a need to study efficiency, network loss reduction under contingency conditions and this is the focus of the research. Most large urban distribution networks are operated as ring main networks. Ring networks are considered to have less power loss. However, a major component in a ring network can cause the loss to substantially increase; resulting in power shortage in the network. There is an urgency to eliminate high network loss. An efficiency plan was developed for a large ring network that reduces the loss so that its input power can be decreased. In this way, the available power existing due to the contingency can be more evenly spread, and the number of ring main networks to be load shed could be reduced.
Li, Rong. "Power plant investment appraisal : electric industry and economic growth nexus". Thesis, University of Strathclyde, 2012. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=25811.
Scimone, Tommaso. "Energy Storage in Electric Power Generation Plant from Renewable Sources". Thesis, Università degli Studi di Catania, 2011. http://hdl.handle.net/10761/228.
Itiki, Rodney. "Metodologia para mapeamento de zonas operacionais em sistemas de transmissão VSC-HVDC". Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/3/3143/tde-09042018-145504/.
High voltage direct current power transmission systems based on voltage source converters (VSC-HVDC), as opposed to alternating current ones, operates as elements of control of electrical variables, being useful for stability of power system. Besides this advantage, VSC-HVDC systems have limitations in stable performance, which instigates the development of a methodology for mapping its operational zones of stability and possible regions of instability. The author initially studied the details of the VSC-HVDC technology such as the power electronic principles and the control strategies used on this research. Subsequently, the author investigated synchronous generator models for interconnection on the AC side of the VSC-HVDC converter stations. Finally, the author applied the VSC-HVDC technology on a model of power system with two converter stations, one located on an offshore port and the other on the shore, next to an alternating current high voltage power grid. Simulations and analysis of this system were carried out considering various operational conditions. The graphic of generated and consumed power on offshore port, obtained by the application of the methodology for mapping operational zones, presents a great potential of being implemented in the man-machine interface of an operation workstation, thus providing high level online information for the operator of the offshore port electrical system and consequently improving its situational awareness of the proximity to instability limits.
Ly, Cuong. "Reliability study of the Callide power station electrical system". Thesis, Queensland University of Technology, 1997. https://eprints.qut.edu.au/36023/1/36023_Ly_1997.pdf.
Murphy, Jill E. "Determination of failure criteria for electric cables exposed to fire for use in a nuclear power plant risk analysis". Link to electronic thesis, 2004. http://www.wpi.edu/Pubs/ETD/Available/etd-0114104-132801.
CHAGAS, EDUARDO BARROS DAS. "PROJECT FINANCE IN THE BRAZILIAN ELECTRIC POWER INDUSTRY: THE BARRA GRANDE HYDRO POWER PLANT CASE". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2006. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=8340@1.
A presente pesquisa se destina a estudar, de forma descritiva e explicativa, o Project Finance como modo de estruturação financeira de projetos de investimento, especialmente às vantagens e desvantagens desta estrutura em comparação às estruturas de financiamentos corporativos tradicionais e na questão do tratamento dispensado por esta estrutura aos diversos riscos relativos ao investimento. Para tal, através da coleta e análise de dados e informações de domínio público, foi utilizada a metodologia de estudo de caso simples aplicada ao caso da Usina Hidrelétrica de Barra Grande, empreendida pela Barra Grande Energética S/A - BAESA, no contexto macro econômico do novo modelo institucional para o setor elétrico.
This research work intends to examine, in a descriptive and explaining manner, the Project Finance as a way to financially structure investment projects, especially when it comes to the advantages and disadvantages of this financial structure as compared to traditional corporate financing, and in the assessment of investment related risks. To do so, publicly available data was collected and analyzed through the Simple Case Research method applied to the Barra Grande Hydro Power Plant Case, within the new Brazilian electric power institutional framework.
Bergman, Andrew. "Determinants of Fuel Choice in New Electric Power Plants". Scholarship @ Claremont, 2013. http://scholarship.claremont.edu/cmc_theses/774.
Bengtsson, Sara. "Modelling of a Power System in a Combined Cycle Power Plant". Thesis, Uppsala universitet, Elektricitetslära, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-149318.
Öström, Daniel. "Styrning av värmepanna med PLC : Från relästyrning till digital styrning". Thesis, Mittuniversitetet, Avdelningen för elektronikkonstruktion, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-31091.
At the municipality-owned energy company Sala Heby Energi AB work is underway to convert the control of a heating-pan from relay control and analog monitoring to digital control with PLC. Within the framework of this degree project, three specific parts of this conversion are studied: a theoretical study aimed at mapping the pros and cons of the conversion, an examination of the possibility of improving individual control functions in conjunction with the conversion and the establishment of a schematic diagram or overview of the heat boiler that will serve as a basis for its implementation in the SCADA-system of the combined power and heating plant. An advantage of relay control is that it can be cost-effective to handle individual simple control tasks. However, overall and in particular for controlling major more complex processes the benefits of digital control is large. This in terms of cost-effectiveness for larger systems, possibilities for more efficient alarm management and the ability to log operational data. Two individual functions are studied: control of the heating pans damper in relation to the steam pressure and fuel management control. To adjust the height of the damper, two control options are compared using Simulink simulations. Conventional PID control is com-pared to a self-configured fuzzy controller. Much due to a poorly substantiated modelling of the process, the fuzzy regulator's possible benefits to the PID regulator can not be determined. Future studies of the fuzzy regulator could potentially change this circumstance. Furthermore, the control of functions for the fuel management are discussed, mainly authorship of drivers who will fill fuel to the fuel storage. In order for them to have access to the fuel management functions when the combined power and heating plant is unmanned, a key switch solution is proposed to activate the control functions. Finally, a new digital overview picture is produced for the system of the heating pan. This contains minor up-dates and adjustments compared to two overview images depicted on the old control cabinets.
Huss, William Reed. "Load forecasting for electric utilities /". The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487263399023837.
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.
Prada, Gil Mikel de. "Design, operation and control of novel electrical concepts for offshore wind power plants". Doctoral thesis, Universitat Politècnica de Catalunya, 2014. http://hdl.handle.net/10803/277427.
La energía eólica marina es un sector emergente que se encuentra en plena expansión. Múltiples circunstancias tales como que cada vez sea más difícil encontrar lugares propicios en tierra (principalmente en Europa) para la instalación de parques eólicos, que a medida que el parque se aleja de la costa el impacto visual y auditivo es menor y que en el mar el viento sopla con más intensidad y de una manera más constante que en tierra, lo cual posibilita obtener una mayor generación de energía eólica, han provocado que cada vez existan más parques eólicos marinos. Hoy en día, factores medioambientales y sociales están obligando a construir los parques eólicos marinos cada vez más alejados de la costa y se espera que esta tendencia continúe en los próximos años. Varios estudios han demostrado que a partir de una cierta distancia crítica entre el parque eólico y su punto de conexión a tierra (aproximadamente 55-70 km), la transmisión mediante alta tensión en corriente continua (ATCC) resulta una opción más interesante que a través de una transmisión en alta tensión de corriente alterna (ATCA), ya que las pérdidas en los cables se ven reducidas, así como los requerimientos de potencia reactiva. Esta tendencia hacia construir parques eólicos marinos cada vez mayores y a ubicarlos más alejados de la costa, supone el tener que resolver ciertos retos técnicos, económicos y políticos a fin de poder ser más competitivos en el futuro en comparación con otras fuentes de generación de energía. Hoy en día existe una importante preocupación por tratar de reducir el elevado coste actual de la energía para los proyectos de eólica marina a base de mejorar la fiabilidad y disponibilidad del sistema, reducir costes de operación y mantenimiento y/o incrementar la generación de energía. Esta tesis tiene como objetivo proponer conceptos eléctricos novedosos, aplicados a parques eólicos marinos, que resulten más rentables que los existentes actualmente. Asimismo, esta tesis pretende analizar de una manera exhaustiva la factibilidad, tanto técnica como económica, de dichos conceptos. Asuntos tales como el diseño, la optimización, el modelaje, la operación y el control son presentes en la tesis. El alcance del trabajo se focaliza en la zona colectora de un parque eólico y, por lo tanto, no se analiza, el sistema de transmisión ni su integración a la red. Dicha zona comprende todo el equipamiento necesario para recolectar la potencia generada por los aerogeneradores y transmitirla a la plataforma marina de ATCC. El primer concepto innovador de parque eólico evaluado puede ser aplicado tanto en parques situados en tierra como en el mar, que tengan una red colectora interna de corriente alterna en media tensión (MTCA) y un sistema de transmisión tanto ATCC o ATCA. Respecto al resto de configuraciones presentadas, estas vienen motivadas por la presencia de la tecnología ATCC y su capacidad para desacoplar eléctricamente la red interna del parque eólico del sistema eléctrico de potencia situado en tierra. Así pues, la primera propuesta de parque eólico a analizar consiste en operar algunas máquinas concretas por debajo de su punto óptimo de operación a fin de poder reducir el efecto estela dentro del parque y poder así maximizar la potencia total extraída por el mismo. Las tres siguientes configuraciones de parque analizadas se fundamentan en la posibilidad que ofrece la tecnología ATCC de poder operar la red interna del parque eólico a una frecuencia variable. En base a este nuevo concepto, la segunda propuesta de parque investigada consiste en prescindir de los convertidores individuales de cada turbina y conectar todos los generadores síncronos del parque eólico (o un simple grupo de máquinas) directamente al convertidor central, el cual opera a frecuencia variable. El tercer diseño de parque eólico se basa en una topología híbrida dentro del parque combinado MTCA y MTCC. Esta configuración surge de optimizar la propuesta anterior de parque eólico. Asimismo, la cuarta propuesta a analizar estudia la posibilidad de tener un parque consistente en generadores de inducción doblemente alimentados conectados a un convertidor común de tensión controlada situado en la plataforma marina, en el cual los convertidores de cada máquina sean de un tamaño menor a lo habitual (aproximadamente a un deslizamiento nominal de un 5%). Este sistema es analizado en detalle tanto estática como dinámicamente. Finalmente, el último concepto que se presenta en esta tesis analiza la posibilidad de considerar un parque eólico marino completamente (transmisión y red interna del parque) constituido mediante tecnología en CC, con el fin de poder reducir las pérdidas tanto en la red interna del parque como en el cable de exportación. En términos generales se puede concluir que todos los conceptos propuestos a lo largo de esta tesis sugieren un gran potencial para poder ser aplicados en futuros parques eólicos marinos, ya que su coste de energía se ve reducido en comparación con los parques eólicos existentes hoy en día.
Jones, I. D. "Assessment and design of small-scale hydro-electric power plants". Thesis, University of Salford, 1988. http://usir.salford.ac.uk/2212/.
Al-qalawi, Usama. "On estimation of efficiencies of hospitals and electric power plants /". Available to subscribers only, 2008. http://proquest.umi.com/pqdweb?did=1674093241&sid=1&Fmt=2&clientId=1509&RQT=309&VName=PQD.
"Department of Economics." Keywords: Estimation, Hospitals, Electric power plants, Efficiency. Includes bibliographical references (p. 87-93). Also available online.
Al-Qalawi, Usama Robin. "On Estimation of Efficiencies of Hospitals and Electric Power Plants". OpenSIUC, 2008. https://opensiuc.lib.siu.edu/dissertations/254.
Smyth, Thomas Paton. "A review of the emergency electric power supply systems at PWR nuclear power plants". Master's thesis, University of Cape Town, 1989. http://hdl.handle.net/11427/22430.
The Emergency Electric Power Supply Systems at Pressurized Water Reactor Nuclear Power Plants are reviewed, problem areas are identified, and recommendations are made for existing and future Nuclear Power Plants. A simplified introduction to a typical Pressurized Water Nuclear Reactor is given and the problems associated with the commercial use of nuclear power are discussed. An overview of the Nuclear industry's solutions is presented and covers the Reliability of equipment and the American Regulatory requirements. The alternating and direct current power supply systems are examined in terms of plant operational state and equipment type (Diesel generators, Grid network, Lead-acid batteries, Battery chargers, Inverters, and Power Distribution networks). The trends in the design of Emergency Electric Power supply systems at Nuclear Power Plants are presented. The loss of all alternating current power, known as Station Blackout, is discussed and the American and European response to this. problem is presented. Problems experienced in the direct current systems are discussed and solutions are presented. The experience at Koeberg Nuclear Power station with Lead-acid batteries is included in the discussion. The thesis concludes with recommendations for designers and operators of the Electric Power Supply Systems at Nuclear Power Stations.
Pappu, Venkata Ajay Kumar. "Implementing frequency regulation capability in a solar photovoltaic power plant". Diss., Rolla, Mo. : Missouri University of Science and Technology, 2010. http://scholarsmine.mst.edu/thesis/pdf/Pappu_09007dcc807d51ca.pdf.
Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed July 19, 2010) Includes bibliographical references (p. 88-90).