Dissertations / Theses on the topic 'Electric power systems – Economic aspects'
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MacGregor, Paul R. "The net utility revenue impact of small power producing facilities operating under spot pricing policies." Diss., Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/13845.
Full textShaalan, Hesham Ezzat. "An interval mathematics approach to economic evaluation of power distribution systems." Diss., Virginia Tech, 1992. http://hdl.handle.net/10919/40081.
Full textSu, Jifeng, and 宿吉鋒. "An analytical assessment of generation asset in the restructured electricity industry." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B37116381.
Full textChan, Chi-yiu, and 陳志銚. "The application of insurance theory to power system operating reserve market." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B3124399X.
Full textThai, Doan Hoang Cau Australian Graduate School of Management Australian School of Business UNSW. "Analysing tacit collusion in oligopolistic electricity markets using a co-evolutionary approach." Awarded by:University of New South Wales. Australian Graduate School of Management, 2005. http://handle.unsw.edu.au/1959.4/22478.
Full textGonçalves, Richard Aderbal. "Algoritmos culturais para o problema do despacho de energia elétrica." Universidade Tecnológica Federal do Paraná, 2010. http://repositorio.utfpr.edu.br/jspui/handle/1/902.
Full textNesta tese, os Sistemas Imunológicos Artificiais são aplicados a diferentes instâncias do despacho econômico e econômico/ambiental de energia elétrica. Os sistemas imunes considerados são baseados no princípio da seleção clonal e usam uma representação real com operador de \emph{aging} puro e operadores de hipermutação utilizando distribuições de probabilidade Gaussianas e de Cauchy. Algoritmos Culturais utilizando fontes de conhecimento normativo, situacional, histórico e topográfico são incorporados para melhorar a capacidade de otimização global dos sistemas imunes. Todas as abordagens propostas possuem vários pontos de auto-adaptação e a maioria utiliza um operador de busca local baseado na técnica quase-simplex. Uma sequência caótica também é considerada como uma potencial fonte de melhoria na variação cultural do algoritmo. Procedimentos de reparação constituem outra contribuição do trabalho e são aplicados para evitar lidar com soluções infactíveis em todos os problemas abordados. Na primeira parte dos experimentos, quatro instâncias do problema do despacho econômico de energia são consideradas. Em todos os casos, foi utilizada uma função não suave de custo de combustível levando em consideração os efeitos de ponto de válvula. Uma das instâncias também considera as perdas na transmissão de energia. Nos experimentos de comparação entre as abordagens propostas, as versões imuno-culturais superam a versão puramente imune. O método cultural proposto que apresenta melhor resultado é escolhido para ser comparado a outras técnicas modernas de otimização reportadas na literatura recente. Em todos os casos mono-objetivo considerados, a abordagem proposta é capaz de encontrar o menor custo de combustível. A segunda parte dos experimentos trata do problema do despacho econômico/ambiental. Esta é uma versão do problema do despacho econômico de energia onde a emissão de poluentes é adicionada como um novo objetivo, tornando este um problema de otimização multiobjetivo não-linear com restrições. Algoritmos imuno-culturais baseados em fatores de escalarização e dominância de Pareto são propostos para este caso. Várias instâncias do problema são utilizadas nos experimentos, algumas das quais consideram perdas na transmissão de energia. Os algoritmos propostos são favoravelmente comparados com um algoritmo do estado-da-arte para otimização multiobjetivo. O melhor algoritmo proposto também é comparado com métodos reportados na literatura recente. As comparações mostram o bom desempenho da melhor abordagem proposta e confirmam seu potencial para resolver o problema do despacho econômico/ambiental de energia.
In this thesis, Artificial Immune Systems are applied to solve different instances of the economic and environmental/economic load dispatch problems. The immune systems considered here are based on the clonal selection principle and use a real coded representation with pure aging operator and hypermutation operators utilizing Gaussian and Cauchy distributions. Cultural Algorithms using normative, situational, historical and topographical knowledge sources are incorporated to improve the global optimization capability of immune systems. All the proposed approaches have several points of self-adaptation and most of them use a local search operator that is based on a quasi-simplex technique. A chaotic sequence is also considered as a potential source of improvement to the cultural variation. Repair procedures represent another contribution of this work and are applied to avoid dealing with infeasible solutions in all the considered problems. In the first part of the experiments, four instances of the economic load dispatch problem are considered. In all the cases, a non-smooth fuel cost function which takes into account the valve-point loading effects is utilized. One of instances also considers energy transmission losses. In the experiments conducted to compare the proposed approaches, the immune-cultural based approaches outperformed the pure immune version. The proposed cultural method which presents the best performance is chosen to be compared with other modern optimization techniques reported in the recent literature. In all the mono-objective cases considered, the proposed approach is capable of finding the minimum fuel cost value. The second part of the experiments deals with the environmental/economic load dispatch problem. This is a multi-objective version of the economic load dispatch where pollution emission is added as an objective, it is formulated as a non-linear constrained multi-objective optimization problem. Cultural immune algorithms based on scalarizing factors and Pareto-dominance are proposed for this case. Several instances of the problem are considered, some dealing with energy transmission losses. The proposed algorithms are favorably compared with a state-of-art algorithm for multi-objective optimization (the Non-dominated Sorting Genetic Algorithm II - NSGA - II). The best proposed algorithm is also compared with methods reported in recent literature. The comparisons demonstrate the good performance of the best proposed approach and confirm its potential to solve the environmental/economic load dispatch problem.
Gupta, Rajnish. "Economic impact of non-utility generation on electric power systems." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/nq23935.pdf.
Full textShu, Chang. "Application of optimization methods for power system economic operation and transfer capability evaluation /." Internet access available to MUN users only, 2003. http://collections.mun.ca/u?/theses,163245.
Full textLi, Furong. "Optimal economic operation of electric power systems using genetic based algorithms." Thesis, Liverpool John Moores University, 1996. http://researchonline.ljmu.ac.uk/5567/.
Full textNg, Kwok-kei Simon, and 吳國基. "A game-theoretic study of the strategic interaction between transmission and generation expansion planning in a restructuredelectricity market." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B39343534.
Full textMacRae, Angus Neil. "Economic and cost engineering aspects of wind energy conversion systems." Thesis, Robert Gordon University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.258961.
Full textLow, Yee Weng. "Techno-economic model for designing marine and offshore power generating systems." Diss., Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/15868.
Full textAl-Gobaisi, Darwish M. K. F. "Economic scheduling in electric power systems : a mathematical model for the U.A.E." Thesis, Loughborough University, 1988. https://dspace.lboro.ac.uk/2134/7288.
Full textPagonis, 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.
Full textJohansson, Nicklas. "Aspects on Dynamic Power Flow Controllers and Related Devices for Increased Flexibility in Electric Power Systems." Doctoral thesis, KTH, Elektriska maskiner och effektelektronik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-37823.
Full textQC 20110819
Liu, Xinghua, and 刘兴华. "Power system operation integrating clean energy and environmental considerations." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B43085866.
Full textTham, Poh Weng Electrical Engineering & Telecommunications Faculty of Engineering UNSW. "Managing market risks in the Australian national electricity market." Awarded by:University of New South Wales. School of Electrical Engineering & Telecommunications, 2005. http://handle.unsw.edu.au/1959.4/20834.
Full textParail, Vladimir. "Evaluation of market-based investment in electricity transmission infrastructure." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610004.
Full text刑衛國 and Weiguo Xing. "Evaluation and scheduling of private power production." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B31242522.
Full textYan, Yonghe, and 嚴勇河. "A multi-agent based approach to transmission cost allocation." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B3124256X.
Full textRibeiro, Alexandre dos Santos. "Soluções para micro sistema elétrico eficiente abastecendo Centro Cirúrgico Móvel na Amazônia." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/3/3143/tde-20102010-115650/.
Full textThe help to populations that need for some modern benefits, achievements of mankind, is a practice of promoting citizenship. This paper shows a technical study on the implementation of temporary electrical installations in isolated locations that is intended to subsidize the activity developed by a group of surgeons that take care of indigenous peoples of Amazonia. The group \"Expedicionários da Saúde\" held since 2004 expeditions to the Amazon communities seeking to bring specialized surgical care to indigenous populations by allowing their return to social life, with recovery of vision and other skills essential for their activities. A diagnosis of conditions found during one of these expeditions showed that many of the failures that often hinder the normal progress of activities can be corrected with simple actions that can be done by the team itself. The strategies presented in detail, as the implementation of energy efficiency actions that reduce energy demand, reduce the large need for fuel and the logistical difficulties involved in its transporting, the cares in carrying out electrical installations and optimal sizing of generators, provide increasing the availability of the electrical system, its security and its users and collaborate with the success of the expedition doctor performed.
Endegnanew, Atsede Gualu. "Distributed generation in future distribution systems : Dynamic aspects." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for elkraftteknikk, 2010. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-11242.
Full textSomayajula, Deepak. "Control aspects of a double-input buckboost power electronic converter." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2009. http://scholarsmine.mst.edu/thesis/pdf/Somayajula_2009_09007dcc8070c9e2.pdf.
Full textVita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed November 17, 2009) Includes bibliographical references (p. 67-70).
Scarsi, Gian Carlo. "Electricity distribution in Italy : microeconomic efficiency analysis of local distributing units with methodological cross-checking." Thesis, University of Oxford, 1998. http://ora.ox.ac.uk/objects/uuid:ca322a0b-7fd0-4a02-a237-bb4b6f02eeda.
Full textBlack, Jason W. (Jason Wayne). "Integrating demand into the U.S. electric power system : technical, economic, and regulatory frameworks for responsive load." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/31168.
Full textIncludes bibliographical references (v. 2, p. 311-316).
The electric power system in the US developed with the assumption of exogenous, inelastic demand. The resulting evolution of the power system reinforced this assumption as nearly all controls, monitors, and feedbacks were implemented on the supply side. Time invariant, averaged retail pricing was a natural extension of the assumption of exogenous demand and also reinforced this condition. As a result, the market designs and physical control of the system exclude active participation by consumers. Advances in information and communications technologies enable cost effective integration of demand response. Integrating demand into the US electricity system will allow the development of a more complete market and has the potential for large efficiency gains. Without feedbacks between supply and demand, attempts to develop competitive markets for electricity will suffer from a greater potential for market power and system failure. This thesis provides an analysis of the technical, regulatory, and market issues to determine a system structure that provides incentives for demand response. An integrated, dynamic simulation model is utilized to demonstrate the effects of large scale adoption of demand response technologies. The model includes distributed decision making by both consumers and investors in generation capacity, the effects of their decisions on market prices, and the feedbacks between them. Large scale adoption of demand response technology is simulated to quantify the potential benefits of responsive demand. The effects of technology improvement via learning, long term demand elasticity, and policies to promote adoption are considered.
(cont.) The simulations show that diminishing returns for adopters and free rider effects limit the attractiveness of individual adoption. A subsidy to alleviate the costs to adopters can be justified by the significant system level savings from widespread participation. Several pernicious effects can emerge from large scale demand response, however, including increased price volatility due to reductions in generation capacity reserve margin, increases in long term demand, and increased emissions from the substitution of peak generation capacity, such as natural gas and renewables by intermediate capacity. Significant rent transfers will also occur, and stakeholder analysis is conducted to determine interests and distributional effects of large scale demand response.
by Jason W. Black.
Ph.D.
Lee, Kelvin. "A study of supply function equilibria in electricity markets /." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=112573.
Full textThis thesis analyzes market power in electricity markets through the notion of Nash equilibrium (NE) and, more specifically, through Supply Function Equilibrium (SFE). We will examine how SFE can be modified to incorporate capacity constraints on generators and generating companies (gencos) controlling more than one generator for a Poolco electricity market with marginal pricing.
A genco's supply function is assumed to be of the form gi=l-aibi . Gaming is done either with ai or bi only, while keeping the other parameter at true cost. Gaming with both variables cannot be analyzed since the problem would have too many degrees of freedom. For each possible generator output level (minimum output, maximum output, or in between), analytical methods are employed to determine all candidate Nash equilibria. Then, simulations are performed over the range of possible genco offers to determine whether these candidates meet the complete set of Nash equilibrium criteria, specifically whether any genco can or cannot improve its profit by gaming.
For various inelastic demand levels, study cases indicate that there are either no Nash equilibria or only one. In the multi-unit genco case, the price of electricity is found to be higher than in the case where each genco owns only one generator, illustrating the effect of market concentration on the price. Whether capacity constraints are considered or not, the price of electricity appears to be higher if gencos are allowed to game with bi instead of ai.
The inclusion of capacity constraints on generators and the consideration of the multi-unit genco case will allow for better genco modeling in a Poolco market with marginal pricing. In turn, this will lead to more accurate analysis of the effects of current and possible rules and regulations on the price of electricity.
Jones, Sophia Christina Acle. "Micro-cogeneration optimal design for service hot water thermal loads." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/16016.
Full textSchneider, Bettina. "Economic feasibility study for the wave energy technology of Gaia Power Group Pty Ltd." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/79331.
Full textGaia Power is a South African start-up in the renewable energy industry. Among other products, they developed a wave energy converter, which is a device used to extract energy from ocean waves. This research deals with the economic feasibility study of the wave energy converter. Wave energy is a young field of research, especially in the South African context. Therefore sources for multiple angles of the project had to be found, analysed and brought into the Gaia Power context. Understanding the cost drivers of a wave energy plant was the foundation of the research itself. The Gaia Power specific levelised cost of electricity generation was calculated based on actual supplier quotes, reference costs found in the literature as well as assumptions. Still, such a calculation is actually more an estimation due to a high uncertainty level in all cost components. Especially the construction cost as well as the discount rate used have therefore been tested for sensitivity. Gaia Power‟s target production cost was R0.54 kWh, which equalled the Eskom tariff at the time of this research. Taking into account a R0.10/kWh fee payable to Eskom, the target cost sank to R0.44, which is about 25 percent lower than the minimum value for electricity generation cost found in the literature. This target was therefore expected to be and proved to be difficult to reach. The calculated levelised electricity cost was R0.99/kWh, with a possible range of R0.54/kWh to R1.60/kWh observed in the sensitivity analysis. These results show that the Gaia Power wave energy converter in the given specifications was not economically feasible. It was therefore recommended to rethink the specifications in order to reduce construction cost, which proved to be the largest cost driver. Besides the quantitative findings, this research also has a strong qualitative side. During the whole research it became obvious that there was an overall high risk level in the project due to the lack of experience with wave energy in general and in South Africa specifically, as well as the high impact of weather on the construction. Those risks were identified, analysed and recommended mitigation actions were derived.
Craig, Michael T. "Economic and Environmental Costs, Benefits, and Trade-offs of Low-carbon Technologies in the Electric Power Sector." Research Showcase @ CMU, 2017. http://repository.cmu.edu/dissertations/1099.
Full textIshaque, 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.
Full textBukula, Mvuleni Joseph. "The influence of the electricity distribution restructuring on the Nelson Mandela Bay Municipality." Thesis, Nelson Mandela Metropolitan University, 2009. http://hdl.handle.net/10948/928.
Full textNguyen, Duy Huu Manh. "Analysing electricity markets with evolutionary computation." University of Western Australia. School of Electrical, Electronic and Computer Engineering, 2002. http://theses.library.uwa.edu.au/adt-WU2003.0018.
Full textMutluer, Bilge Halas. "Design, Implementation And Engineering Aspects Of Tcr For Industrial Svc Systems." Phd thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609424/index.pdf.
Full texta novel, unified and relocatable SVC for open cast lignite mining in Turkey is designed, implemented and commissioned. The second case study is the first 12 pulse TCR design and implementation for ladle furnace compensation in the world. The SVC simulation results are verified by data acquired in the field. Real time data are also simulated in EMTDC/PSCAD program to verify the control system responses of the commissioned systems.
Seres, Stephen. "The power generation sector's demand for fossil fuels : a quantitative assessment on the viability of carbon fees for the reduction of greenhouse gas emissions." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=31535.
Full textTomiyama, Elias Kento 1981. "Estudo do aspecto locacional da alocação de custos da transmissão = Study of the locational aspect in the transmission cost allocation problem." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/262018.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação
Made available in DSpace on 2018-08-21T03:54:49Z (GMT). No. of bitstreams: 1 Tomiyama_EliasKento_M.pdf: 3080864 bytes, checksum: 7293fe7b3271c5c27e9b967c48a4e245 (MD5) Previous issue date: 2012
Resumo: Esta dissertação de mestrado apresenta quatro metodologias de alocação de custos da transmissão: Pro rata (PR), Divisão Proporcional (PS), Zbus-médio (Zbus_AVG) e Nodal. Enquanto a primeira desconsidera o aspecto locacional e aloca os custos baseado apenas na quantidade de potência produzida pelos geradores e consumida pelas cargas, as últimas três levam em conta este aspecto, ou seja, as tarifas pagas por geradores e cargas dependem do seu ponto de conexão na rede elétrica. Através de simulações computacionais são levantadas várias situações de operação no sentido de avaliar a influência e as possíveis implicações de ordem regulatória, política, econômica e social de um país provocadas pela inclusão do aspecto locacional na definição das tarifas de uso do sistema de transmissão. Por fim, mostra-se a possibilidade de se considerar as tarifas pagas pelos agentes do sistema como um critério de decisão a mais no problema do planejamento da expansão da transmissão
Abstract: This dissertation describes four transmission cost allocation methodologies: Pro rata (PR), Proportional sharing (PS), Zbus-average (Zbus_AVG) and Nodal. While the first one disregards the locational aspect and allocates costs based only on the amount of power delivered by generators and consumed by loads, the last three ones take this aspect into account, i.e. charges are dependent on where generators and demands are connected in the network. Several computer simulations were made in order to assess the influence of the locational aspect into transmission pricing scheme and the results were used for a critical analysis, including political, regulatory, economic and social aspects. Finally, we discuss the possibility of using the fees paid by transmission system agents as an additional criterion for the Transmission Expansion Planning problem
Mestrado
Energia Eletrica
Mestre em Engenharia Elétrica
Krishnamurthy, Senthil. "Development of decomposition methods for solution of a multiarea power dispatch optimisation problem." Thesis, Cape Peninsula University of Technology, 2013. http://hdl.handle.net/20.500.11838/1193.
Full textThe objective of the economic dispatch problem of electrical power generation is to schedule the committed generating unit outputs to meet the required load demand while satisfying the system equality and inequality constraints. The thesis formulates single area and multi-area Combined Economic Emission Dispatch (CEED) problem as single criterion, bi-criterion and multi-criteria optimisation problems based on fuel cost and emission criterion functions, constraints over the operational limits of the generator and the tie-lines, and requirements for a balance between the produced power and the system demand and power loss. Various methods, algorithms and softwares are developed to find solution of the formulated problems in single area and multi-area power systems. The developed methods are based on the classical Lagrange's and on the meta-heuristic Particle Swarm Optimisation (PSO) techniques for a single criterion function. Transformation of the bi-criteria or multi-criteria dispatch problem to a single criterion one is done by some existing and two proposed in the thesis penalty factors. The solution of the CEED problems is obtained through implementation of the developed software in a sequential way using a single computer, or in a data-parallel way in a Matlab Cluster of Computers (CC). The capabilities of the developed Lagrange's and PSO algorithms are compared on the basis of the obtained results. The conclusion is that the Lagrange's method and algorithm allows to receive better solution for less computation time. Data-parallel implementation of the developed software allows a lot of results to be obtained for the same problem using different values of some of the problem parameters. According to the literature papers, there are many algorithms available to solve the CEED problem for the single area power systems using sequential methods of optimisation, but they consume more computation time to solve this problem. The thesis aim is to develop a decomposition-coordinating algorithm for solution of the Multi Area Economic Emission Dispatch (MAEED) problem of power systems. The MAEED problem deals with the optimal power dispatch inside and between the multiple areas and addresses the environmental issue during the economic dispatch. To ensure the system security, tie-line transfer limits between different areas are incorporated as a set of constraints in the optimisation problem. A decomposition coordinating method based on the Lagrange's algorithm is developed to derive a set of optimal solutions to minimize the fuel cost and emissions of the multi-area power systems. An augmented function of Lagrange is applied and its decomposition in interconnected sub problems is done using a new coordinating-vector. Task-parallel computing in a Matlab Cluster is used to solve the multi-area dispatch problem. The calculations and tasks allocation to the Cluster workers are based on a shared memory architecture. Implementation of the calculation algorithm using a Cluster of Computers allows quick and simpler solutions to the multi-area CEED problem. The thesis applied the developed algorithms for the various problem formulation scenarios, i.e. fuel cost and emission function with and without valve point loading effect, quadratic and cubic fuel cost and emission functions. The various IEEE benchmark models are used to test the developed Lagrange's and PSO algorithms in the sequential, data-parallel, and task-parallel implementations. Developed methods, algorithms and software programmes can be applied for solution of various energy management problems in the regional and national control centres, smart grid applications, and in education and research institutions.
Enzinger, Sharn Emma 1973. "The economic impact of greenhouse policy upon the Australian electricity industry : an applied general equilibrium analysis." Monash University, Centre of Policy Studies, 2001. http://arrow.monash.edu.au/hdl/1959.1/8383.
Full textMalgas, Isaac. "Towards risk management in a deregulated and competitive electricity supply industry." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/53195.
Full textENGLISH ABSTRACT: The energy sector of the South African economy is poised to change in extraordinary ways. In just a few short years from now, the days will be gone when generators are guaranteed of their income and where regional distributors have the monopoly in the regions that they are servicing. Other energy markets in the world, such as oil and gas, have been free of regulation for many years. More recently, local policymakers have been focussing on increasing competition in the electricity sector and in so doing, liberate electric utilities from government's long established control. The shift away from government regulation of energy will lead to something even more important than placing downward pressure on the price of a MWh. It will instigate the development of multiple trading centres and platforms that are dedicated to competition in the free trade of electricity and related products. With the deregulation of the electricity supply industry and the inevitable introduction of competition, the real risks of energy trading will be faced by generators and distributors alike. This research investigates the changes that are set to occur within the next few years, based on developments that have unfolded in countries where electricity supply industries have been privatised and utilities and distributors are managing their risks in this new competitive environment. It explains how the South African Electricity Supply Industry may change with respect to the develop of markets which provide risk cover to industry players, the practices assumed by utilities in international electricity supply industries to minimise their risk exposure, and how industry players can use derivative instruments to manage their risks better.
AFRIKAANSE OPSOMMING: Die elektrisiteitsvoorsieningssektor is gereed om groot veranderings te maak. Binne 'n paar jaar, sal ons die einde sien van die dae waar kragstasies gewaarborg is van hulle inkomste en waar streeksvoorsieners die monopolie het in die streke waarin hulle verskaf. Ander energie markte in die wêreld, soos die van olie en natuurlike gas, is al sonder regulering vir baie jare. Meer onlangs het beleidsrade hul tyd toegewy aan die instelling van kompetisie in die elektrisiteitsvoorsieningssektor om utiliteitsmaatskappye vry te maak van staatsbeheer. Hierdie beweging weg van staatsbeheer sal lei na iets meer as net die afwaardse druk op die prys van 'n MWh. Dit sal die begin merk van die ontwikkeling van veelvoudige verhoë wat toegewyd is aan kompetisie in die vrye handel van elektrisiteit en soortgelyke produkte. Met die deregulering en die onvermydelike indiening van kompetisie, sal die ware risikos van energie handel aanvaar word deur voortbrengers en verskaffers van elektrisiteit. Hierdie navorsing stel ondersoek in die veranderings wat van plan is om te gebeur in die volgende paar jaar en is gebaseer op die ontwikkelinge wat in lande afgespeel het waar elektrisiteitsvoorsieningsnywerhede geprivatiseer is en waar voortbrengers en verskaffers van elektrisiteit hulle risikos bestuur in hierdie nuwe mededingende sektor. Dit verduidelik hoe die Suid-Afrikaanse elektrisiteitsvoorsieningsnywerheid mag verander teen opsigte van die ontwikkeling van markte wat risiko versekering aanbied vir utiliteitsmaatskappye, die praktyke wat deur hierdie spelers toegepas word om hulle blootstelling aan risikos te verminder, en ook hoe hulle afgeleide instrumente gebruik om hulle risikos beter te bestuur.
Kotoane, Mapule. "Modelling risk of Blue Crane (Anthropoides paradiseus) collision with power lines in the Overberg region." Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/50024.
Full textENGLISH ABSTRACT: This study addresses the problem of Blue Crane (Anthropoides paradiseus) collisions with power lines in the Overberg region, home to approximately 50% of South Africa's national bird's global population. The low visibility of power lines against the landscape is considered to be the major cause of collisions. These claim at least 20 birds annually, which is a considerable loss to a vulnerable species. For this study, expert knowledge of the Blue Cranes' biology, general behaviour and use of its habitat were compiled. These were then translated into rules that were integrated into a Geographic Information System (GIS) to establish a predictive model, which attempts to identify and quantify risk power lines that Blue Cranes are most likely to collide with. The criteria that were considered included landscape proximity of power lines to water bodies arid congregation sites, land cover, power lines orientation in relation to predominant wind directions (North Westerly and South Easterly) and visibility of the power lines against the landscape. The power lines were ranked as highest, high, medium, low and no risk. It is recommended that this classification be used to prioritize the proactive marking of power lines with bird flappers in order to reduce collisions. The results show that 27% of the power lines in the study area pose the highest risk and should therefore be marked immediately. The power lines classified as high (1%), medium (28%) and low risk (21 %) should be marked over short, medium and long term, respectively .. The study demonstrated the potential of GIS in the conservation of Blue Crane. The GIS model developed in this study can be applied in areas of similar habitat such as the Swartland or with some modifications in a slightly different habitat such as the Karoo. It is envisaged that the results of this study will be of great value to the ESKOM (South African Electricity Commission) and Endangered Wildlife Trust (EWT) Partnership and conservation authorities in the effort to save the Blue Crane.
AFRIKAANSE OPSOMMING: Hierdie studie het die probleem van botsings deur Bloukraanvoëls met kraglyne in die Overberg-omgewing van die Wes-Kaap ondersoek. Die Overberg-omgewing huisves ongeveer 50% van Suid Afrikaanse nasionale voël se wêreldbevolking van Bloukraanvoëls, en aangesien kraglyne normaalweg nie maklik sigbaar is teen die landskapsagtergrond nie, verhoog dit, tesame met die biologiese eienskappe van Bloukraanvoëls, die waarskynlikheid dat die voëls met kraglyne sal bots. Hierdie botsings met kraglyne eis minstens 20 Bloukraanvoëls per jaar, wat 'n aansienlike en beduidende aantal vir 'n kritiese bedreigde spesie is. Die studie het gepoog om spesialiskennis oor Bloukraanvoël-biologie, algemene gedrag en habitatgebruik, om te sit in 'n stel reëls, wat in 'n Geografiese Inligtingstelsel (GIS) geïntegreer is om 'n voorspellingsmodel te bou. Hierdie voorspellingsmodel is aangewend om kraglyne wat 'n hoë risiko vir Bloukraanvoëls inhou, te identifiseer en die waarskynlikheid vir botsings te kwantifiseer. Die model aanvaar dat die volgende omgewingsfaktore in die Overberg-omgewing verband hou met die waarskynlikheid van botsings, naamlik: die nabyheid van kraglyne aan waterliggame of gebiede waar voëls saamtrek, die voorkoms van natuurlike veld, die heersende windrigtings (Noordwes en Noordoos) en lae sigbaarheid van kraglyne teen die donker landskapsagtergrond. Die geïdentifiseerde kraglyne is as eerste-, tweede, derde. en vierderangse prioriteit geprioritiseer om as riglyn te dien vir die proaktiewe aanbring van flappers (wat dit ten doel het om voëlbotsings te verminder) deur ESKOM. Die studie het bevind dat 27% van die kraglyne in die Overberg-omgewing eersterang prioriteite is, en dat hierdie kraglyne onmiddellik gemerk sal moet word. Die tweederang prioriteit kraglyne (1%) saloor die mediumtermyn gemerk word, terwyl die derderangse prioriteit kraglyne (28%) oor die langtermyn gemerk sal word. Die vierde prioriteit kraglyne (21 %) kon oor die langertermyn gemerk word. Die studie het die omvang van die probleem, sowel as die rol van GIS in die bewaring van die Bloukraanvoëls beklemtoon. Die GIS-model wat in die studie ontwikkel en gebruik is, kan in soortgelyke gebiede soos die Swartland, of in ietwat verskillende omgewings soos die Karoo getoets word, met die doelom die habitatvoorkeure van Bloukraanvoëls beter te verstaan en navorsers te help om 'n beter begrip van die model te ontwikkel en sodoende die resultate te verbeter. Dit word voorsien dat hierdie studie en verslag baie belangrik sal wees vir die ESKOM-EWT Vennootskap en ander betrokke bewaringsorganisasies in 'n poging om Bloukraanvoël-bewaring aan te help.
Kasmaei, Mahdi Pourakbari. "Despacho ótimo de potências ativa e reativa de sistema elétricos multi-áreas considerando restrições físicas, econômicas e ambientais = Envronmentally constrained active-reactive optimal power flow-a compromising strategy for economic-emission dispatch and a multi-area paradigm /." Ilha Solteira, 2015. http://hdl.handle.net/11449/126414.
Full textBanca: Ruben Augusto Romero Lazaro
Banca: Antonio Padilha Feltrin
Banca: Elizete de Andrade Amorim
Banca: Roberto Chouhy Leborgne
Resumo: Nos estudos de planejamento da operação de sistemas de energia elétrica a formulação e solução dos problemas de despacho econômico-ambiental e multi-área são considerados dois problemas de otimização desafiadores. Neste trabalho propõem-se dois novos modelos matemáticos que visam contribuir e contornar algumas desvantagens dos modelos existentes na literatura para os problemas de fluxo de potência ótimo ativo-reativo econômico- ambiental (FPOAREA), e uma formulação integrada para problema multi-área (FPOAREA- MA). No FPOAREA propõe-se uma formulação eficaz para obter um compromisso adequado entre os custos de geração e de emissão, através de um paradigma baseado em normalização inequívoca (PBNI). Ao contrário dos métodos comumente utilizados, que são principalmente aplicáveis a problemas de FPO simples (despacho econômico, despacho econômico com restrições de segurança, etc.), na abordagem PBNI, ao invés de usar um custo do controle da poluição com base na potência máxima (CCPBPM), utiliza-se um custo de controle adaptativo da poluição (CCAP), que representa o custo de controle baseado na topologia atual de operação da rede. A principal contribuição desse paradigma é utiliza a teoria da normalização para o FPO econômico-orientado, o FPO ambiental-orientado, e até mesmo para o fator CCAP. No modelo proposto para o FPOAREA-MA em vez de usar metodologias de decomposição descritas na literatura que têm várias desvantagens e problemas de coordenação, uma formulação integrada que considera as restrições ambientais é proposta. Esta formulação integrada foi desenvolvida com base nos conceitos de modelos centralizados e descentralizados. Este modelo pode ser facilmente resolvido através de solvers comerciais e a sua resposta é precisa, e os resultados obtidos podem ser usados em mercados de eletricidade, planejamento de linhas de interconexões entre sistemas vizinhos, etc. Para mostrar...
Abstract: In a power system, the economic and emission dispatch and multi-area-based problems are considered as the two most challenging optimization problems. This work presents two novel mathematical models to address some drawbacks of the existing models in the domain of the aforementioned problems, including an economic and emission active- reactive optimal power flow (AROPF), and an integrated formulation for multi-area environmentally-constrained AROPF. In order to obtain an effective formulation to make an appropriate compromise between cost and emission, an unequivocal normalization-based paradigm (UNBP) is presented that solves the dynamic economic and emission AROPF problems. Unlike the commonly used methods, which are mostly applicable to simple OPF problems (economic dispatch, security-constrained economic dispatch, etc.), in the UNBP approach, rather than using a maximum output-based pollution control cost (MOPCC), an adaptive pollution control cost (APCC) is employed, which is a topology-based control cost is used. The main contribution of this paradigm is to make use of the normalization theory for the economic- oriented OPF, the environment-oriented OPF, and even for the APCC factor. In addition, in this work a multi-area active-reactive optimal power flow (MA- AROPF) is proposed. In the MA-AROPF model, instead of using decomposition methodologies that have several disadvantages and shortcomings, an integrated formulation that considers the environmental constraints is proposed. This integrated formulation has been created based on the concepts of centralized and decentralized models. This model can be easily solved via commercial solvers and because of its precise answer, it can be used in electricity markets, tie line planning, etc. In order to show the easy implementable characteristic of the MA-AROPF, it is applied on a tie line planning problem. In this work, in order to obtain optimal tie lines, the planning is performed under ...
Doutor
Kasmaei, Mahdi Pourakbari [UNESP]. "Despacho ótimo de potências ativa e reativa de sistema elétricos multi-áreas considerando restrições físicas, econômicas e ambientais =: Envronmentally constrained active-reactive optimal power flow-a compromising strategy for economic-emission dispatch and a multi-area paradigm." Universidade Estadual Paulista (UNESP), 2015. http://hdl.handle.net/11449/126414.
Full textNos estudos de planejamento da operação de sistemas de energia elétrica a formulação e solução dos problemas de despacho econômico-ambiental e multi-área são considerados dois problemas de otimização desafiadores. Neste trabalho propõem-se dois novos modelos matemáticos que visam contribuir e contornar algumas desvantagens dos modelos existentes na literatura para os problemas de fluxo de potência ótimo ativo-reativo econômico- ambiental (FPOAREA), e uma formulação integrada para problema multi-área (FPOAREA- MA). No FPOAREA propõe-se uma formulação eficaz para obter um compromisso adequado entre os custos de geração e de emissão, através de um paradigma baseado em normalização inequívoca (PBNI). Ao contrário dos métodos comumente utilizados, que são principalmente aplicáveis a problemas de FPO simples (despacho econômico, despacho econômico com restrições de segurança, etc.), na abordagem PBNI, ao invés de usar um custo do controle da poluição com base na potência máxima (CCPBPM), utiliza-se um custo de controle adaptativo da poluição (CCAP), que representa o custo de controle baseado na topologia atual de operação da rede. A principal contribuição desse paradigma é utiliza a teoria da normalização para o FPO econômico-orientado, o FPO ambiental-orientado, e até mesmo para o fator CCAP. No modelo proposto para o FPOAREA-MA em vez de usar metodologias de decomposição descritas na literatura que têm várias desvantagens e problemas de coordenação, uma formulação integrada que considera as restrições ambientais é proposta. Esta formulação integrada foi desenvolvida com base nos conceitos de modelos centralizados e descentralizados. Este modelo pode ser facilmente resolvido através de solvers comerciais e a sua resposta é precisa, e os resultados obtidos podem ser usados em mercados de eletricidade, planejamento de linhas de interconexões entre sistemas vizinhos, etc. Para mostrar...
In a power system, the economic and emission dispatch and multi-area-based problems are considered as the two most challenging optimization problems. This work presents two novel mathematical models to address some drawbacks of the existing models in the domain of the aforementioned problems, including an economic and emission active- reactive optimal power flow (AROPF), and an integrated formulation for multi-area environmentally-constrained AROPF. In order to obtain an effective formulation to make an appropriate compromise between cost and emission, an unequivocal normalization-based paradigm (UNBP) is presented that solves the dynamic economic and emission AROPF problems. Unlike the commonly used methods, which are mostly applicable to simple OPF problems (economic dispatch, security-constrained economic dispatch, etc.), in the UNBP approach, rather than using a maximum output-based pollution control cost (MOPCC), an adaptive pollution control cost (APCC) is employed, which is a topology-based control cost is used. The main contribution of this paradigm is to make use of the normalization theory for the economic- oriented OPF, the environment-oriented OPF, and even for the APCC factor. In addition, in this work a multi-area active-reactive optimal power flow (MA- AROPF) is proposed. In the MA-AROPF model, instead of using decomposition methodologies that have several disadvantages and shortcomings, an integrated formulation that considers the environmental constraints is proposed. This integrated formulation has been created based on the concepts of centralized and decentralized models. This model can be easily solved via commercial solvers and because of its precise answer, it can be used in electricity markets, tie line planning, etc. In order to show the easy implementable characteristic of the MA-AROPF, it is applied on a tie line planning problem. In this work, in order to obtain optimal tie lines, the planning is performed under ...
Lochery, Emma. "Generating power : electricity provision and state formation in Somaliland." Thesis, University of Oxford, 2015. http://ora.ox.ac.uk/objects/uuid:0d386359-b711-4137-bd3c-0aeb78a12c39.
Full textParedes, Romel Wiliams Jimenez. "Desenvolvimento de uma metodologia para a coordenação hidrotérmica de longo prazo em mercado elétrico competitivo." Universidade Federal do Maranhão, 2007. http://tedebc.ufma.br:8080/jspui/handle/tede/447.
Full textIn this work a methodology based on linear programming for long-term hydrothermal scheduling of electric power systems is proposed. The objective of the hydrothermal scheduling is to find an optimal operation for a specific time interval and with high reliability and minimum cost. That is equivalent to determine an optimal generation scheduling for the power plants and for each time interval considered, in order to the power system satisfies the forecasted demand. Linear models of the power system components are adopted, and with the option to solve systems with multiple reservoirs and buses. It was implemented a computer program using MATLAB platform for application to small test power systems and configurations of real-size systems such as the interconnected Peruvian System and the Brazilian South-Souheast System. For the solution of the linear optimization problem was used the interior points method. From the analysis of the test systems results is concluded that the linear model may capture adequately the relevant characteristics of the real power system and it may be eficient and precise such as the detailed model.
Neste trabalho é proposta uma metodologia baseada em programação linear para a solução da coordenação hidrotérmica de longo prazo de sistemas de energia elétrica. O objetivo da coordenação hidrotérmica é encontrar uma política de operação ótima em um determinado período de tempo, com alta confiabilidade e custo mínimo. Isto equivale a determinar um cronograma ótimo de geração para cada usina, a cada intervalo de tempo, de modo que o sistema atenda a demanda prevista. Adotam-se modelos lineares dos componentes do sistema de potência, com a opção de resolver sistemas com múltiplos reservatórios e múltiplas barras. Foi implementado um programa computacional em MATLAB para a solução de sistemas teste de pequeno porte e configurações de sistemas de potência reais tal como o Sistema Interligado Peruano e o Sistema Brasileiro da Bacia Sul-Sudeste. Para a solução do problema de otimização linear foi utilizado o método de pontos interiores. Da análise dos resultados com os sistemas teste conclui-se que o modelo linear pode capturar adequadamente as características relevantes do sistema real e pode ser tão eficiente e preciso quanto o modelo detalhado.
Tulpule, Pinak J. "Control and optimization of energy flow in hybrid large scale systems - A microgrid for photovoltaic based PEV charging station." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1313522717.
Full textWeiland, Daniel Albert. "Rooftop pv impacts on fossil fuel electricity generation and co2 emissions in the pacific northwest." Thesis, Portland State University, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=1547603.
Full textThis thesis estimates the impacts of rooftop photovoltaic (PV) capacity on electricity generation and CO2 emissions in America's Pacific Northwest. The region's demand for electricity is increasing at the same time that it is attempting to reduce its greenhouse gas emissions. The electricity generated by rooftop PV capacity is expected to displace electricity from fossil fueled electricity generators and reduce CO2 emissions, but when and how much? And how can this region maximize and focus the impacts of additional rooftop PV capacity on CO2 emissions? To answer these questions, an hourly urban rooftop PV generation profile for 2009 was created from estimates of regional rooftop PV capacity and solar resource data. That profile was compared with the region's hourly fossil fuel generation profile for 2009 to determine how much urban rooftop PV generation reduced annual fossil fuel electricity generation and CO2 emissions. Those reductions were then projected for a range of additional multiples of rooftop PV capacity. The conclusions indicate that additional rooftop PV capacity in the region primarily displaces electricity from natural gas generators, and shows that the timing of rooftop PV generation corresponds with the use of fossil fuel generators. Each additional Wp/ capita of rooftop PV capacity reduces CO2 emissions by 9,600 to 7,300 tons/ year. The final discussion proposes some methods to maximize and focus rooftop PV impacts on CO2 emissions, and also suggests some questions for further research.
Abdel-Karim, Khalid Hasan. "Economic power factor determination of electric power systems." 1988. http://hdl.handle.net/2097/23726.
Full textChintamani, Vyjayanthi. "Planning And Operational Aspects Of Real And Reactive Power In Deregulated Power Systems." Thesis, 2010. http://etd.iisc.ernet.in/handle/2005/2269.
Full textVisakha, K. "Some Aspects Of Voltage Stability Improvement In Planning And Operation Of Power Systems." Thesis, 2004. http://etd.iisc.ernet.in/handle/2005/1169.
Full textPretorius, Zirk Bernardus. "Aspects of management of the electricity supply industry in a deregulated environment." Thesis, 2012. http://hdl.handle.net/10210/7554.
Full textTraditionally, the Electricity Supply Industry (ESI) organisational structure consisted of generating plant, transmission and distribution networks, a regulating authority and network control, all vertically integrated into single organisational structure. The result of the vertically integrated organisational structure, in other words an organisation where all the functions belong to a single organisation, and some of the organisation's functions are not the sole responsibility of one specific functional area, has been a captive market for the industry. No real market forces existed to control the industry. The responsibility for the industry was traditionally left in the hands of a single organisation, accountable only to the regulating authority. However, the industry has recently been subjected to incredible pressure to reform. The incentive to reform is based on various factors, ranging from sound business decisions, the need to reduce government debt, reduction of primary energy cost for key industries to political pressure. A common thread throughout the reform exercise is the requirement that competition must be introduced into the ESI to ensure market forces on the industry. To introduce competition into the industry, the authorities often start by unbundling the different functions in the industry. The second step is to identify the functions that can only operate effectively as a monopoly. The authorities then need to determine the optimum balance between regulatory rules and requirements and market forces on the. industry. By introducing the optimum balance between industry regulation, market forces and the specific needs of each country, the changes in the industry may result in long term gain for the industry's host country. The gains are often measured in reduced electricity cost and growth in industries dependant on the ESI as a primary energy source. The study incorporates a wide range of issues, starting with the drivers behind the deregulation effort through management tools to regulatory rules and requirements in the deregulated environment. The study evaluates the risks and benefits of the deregulated market, and examines the tools adopted from the financial markets and used in the new electricity markets. The requirement for regulatory rules will be evident throughout the dissertation, and will be discussed in detail in the final chapter. The study is concluded with the message that the common factors and resultant solutions are of such a nature that it would not be necessary to develop a new set of rules, regulations and management tools for a country starting down the road of deregulation. It would however be required to determine the needs of the industry's host country and to adapt the current tools and regulatory rules to the country it is implemented in. The final outcome of the dissertation is that the post-deregulated industry has only just started operating under the new regulatory regime and using the newly developed electricity markets. The industry is still subject to a severe learning curve, adapting and developing daily to satisfy the needs of a deregulated industry. There are sections of the industry that still need to be examined and optimised. However, the success of some of the deregulation efforts in the industry, and especially the deregulation in the UK confidently underwrite any equivalent exercise in the ESI.
Berrisford, Andrew John. "The development of a demand profile forecasting model for Eskom, with particular emphasis on the estimation of the demand impact of time differentiated tariffs." Thesis, 2016. http://hdl.handle.net/10539/20671.
Full textAccurate forecastinu of system Maximum Demand (MDl is vital ~o Esk011l. Under-estimating the MD could re-ul: in a generation capacity shortage. with devastating consequences for the economy. Similarly. a high MD forecast would result in overcapacity. with expensive generating plant standing idle The traditional method of MD forecasting in Eskorn has become unreliable due to a changing relationship between forecast energy sales and expected maximum demand. The reasons for the changing system demand profile were isolated and analysed. Alternative MD forecasting techniques are evaluated and end-use hourly aggregation modets were ;d'~ntifieJ as a method suitable for Eskorn, An experimental demand profile forecasting moue! was developed, using data from a previous project. The model was tested and proved able to cope with the structural changes in the system demand profile. This resulted in the adoption of this technique by Eskorn and approval for the devclopn-ent of a f\.JJ1 scale de manu profile forecasting model.