No description available.

Fundação de Amparo a Pesquisa do Estado de Minas Gerais / The search for solutions to the various problems of power quality, especially to voltage deviation from the standard values, account today, with an extensive range of products aiming above all the dynamic regulation of the supply voltage. Despite this recognition, the challenges to find alternatives technologies that take into account the use of compensators with more attractive operational and economic properties, are still motivating research worldwide. Among the devices based on the principle of consumption or supply of reactive power, in the 60 s came a product design nominated by Reactor Core Saturated Compensator- CERNS. This device is constituted by an inductive unit, comprising a magnetic core and windings with special features, connected in parallel with a capacitor unit. Although this equipment has been widely used in the past, the lack of publications on the subject resulted in a large gap in knowledge domain and dissemination of this technology. This fact contributed to a demand for dedicated efforts in recent years by national and international researchers. In the light of the attractions offered by this philosophy for voltage regulators, the subject has reawakened the interest for research and developments about the project, construction and operation of these compensators, thus aiming the technology domain. On the above, added to efforts previously made by national institutions, arises the present thesis aimed at providing a computational program to assist in the specification and basic design of saturated core reactors and means for determination of the equivalent electrical parameters needed to the model of the equipment proposed and implemented in the ATP simulator. Finally, performance studies are carried out to highlight and to validate the operational efficiency and computational model developed. / A busca por soluções para os distintos problemas da qualidade da energia elétrica, com destaque às variações das tensões de suprimento, conta, na atualidade, com uma extensa gama de produtos visando, sobretudo, a regulação dinâmica da tensão de suprimento. Não obstante tal reconhecimento, os desafios por estratégias alternativas em que pese o emprego de compensadores com propriedades operacionais e econômicas mais atrativas continuam motivando pesquisas em todo o mundo. Dentre os dispositivos fundamentados no princípio do consumo ou fornecimento de potências reativas, nos anos 60 surgiu uma concepção de produto, denominado Compensador a Reator a Núcleo Saturado CERNS. Este é composto, fundamentalmente, por um núcleo magnético com características e enrolamentos especiais e capacitores conectados em paralelo. Embora este equipamento tenha sido amplamente utilizado no passado, a ausência de publicações sobre o tema resultou numa grande lacuna para o conhecimento, domínio e difusão desta tecnologia. Tal fato corroborou para uma demanda de esforços dedicados nos últimos anos no âmbito nacional e internacional e, à luz dos atrativos oferecidos pela presente filosofia para os reguladores, o assunto voltou a despertar interesses para as pesquisas e desenvolvimentos visando o domínio da tecnologia para o projeto, construção e operação destes compensadores. Diante do exposto, somado a esforços já alcançados através de desenvolvimentos anteriores realizados por instituições nacionais, surge esta tese, a qual encontra-se fundamentada no desenvolvimento de uma estratégia computacional para o dimensionamento do compensador, projeto básico do reator saturado e análise de desempenho no domínio do tempo. Para tanto é utilizada a plataforma ATP, de domínio público e aceitação comprovada no cenário nacional. Por fim, estudos diversos de desempenho são conduzidos para a validação da eficácia operacional e do modelo computacional desenvolvido. / Doutor em Ciências

This paper deals with possible ways of voltage regulation. Theoretical part includes a search of published methods and the available voltage regulators. Acquired theoretical knowledge has been applied in the development of mathematical models of two selected controllers applied to the testing network. The result of this work is a summary of the outcomes of dynamic simulations with two selected regulators at various locations in testing network. Comparing the results of dynamic simulation for two selected states was chosen the most appropriate regulator and its optimal location in testing network.

This Master's thesis deals with solution of nonstandard operation connection of E.ON's 22kV distribution network in given area, considering the possibilities of operating dispersed electric power sources currently available, as well as possible power sources connected to the distribution network in the future and its potential operation limitation. A part of this paper is a description of calculation methods used for network evaluation in steady state, with emphasis on linear calculations used by E-Vlivy program, in which the operational possibilities are simulated. Therefore, a description of this program is also included. Suggested operation possibilities correspond with E.ON's valid distribution network operation rules. The outcome of this paper will serve to E.ON's 22kV network's controllers as materials for network operating in nonstandard operation states.