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Previous issue date: 2015-06-19 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Dist?rbios el?tricos como afundamentos de tens?o, interrup??es e desequil?brios de
tens?o podem causar s?rios problemas para os consumidores e para as empresas de gera??o
e transmiss?o de energia. Nos ?ltimos anos, essas empresas de servi?os el?tricos
v?m empregando t?cnicas e equipamentos de prote??o para evitar a ocorr?ncia dist?rbios
ou para amenizar os seus efeitos no sistema. Geradores de dist?rbios s?o utilizados
para analisar o comportamento de equipamentos el?tricos e eletr?nicos frente a poss?veis
dist?rbios el?tricos. A an?lise dessas falhas permite o desenvolvimento equipamentos
de prote??o adequados. Neste trabalho ? apresentado o desenvolvimento de um gerador
de dist?rbios baseado em conversores de pot?ncia que, aliado com uma estrat?gia de
controle, ? capaz de gerar v?rios tipos de dist?rbios sim?tricos como: afundamentos trif?-
sicos, eleva??es trif?sicas e inje??o de harm?nicos. A estrat?gia de controle ? baseada no
controle linear discreto e no controle repetitivo. S?o detalhadas as etapas do projeto dos
controladores e do filtro utilizado para a redu??o de harm?nicos na sa?da. S?o apresentados
os resultados obtidos com simula??es computacionais e os resultados obtidos com
ensaios do sistema implementado em laborat?rio. / Electrical disturbances such as voltage sags, interruptions and voltage unbalances
might cause serious problems for the end-user and for the companies of generation and
transmission of energy. Few years ago, those companies have been using methods and
equipments of protection to avoid the disturbances? presence or to mitigate their effects
on the power system. Disturbances generators are used to analyse the behavior of electrical
and electronic equipments affected by disturbances. The analysis of those failures
allows the development of appropriated protection equipments. In this paper, the development
of a disturbances generator based on power converters is presented. The disturbance
generator developed is able to generate some symmetrical disturbances, such as: voltage
sags, voltage swells and harmonic distortion. The control strategy used in the disturbance
generator is based on discrete and repetitive control. The steps of the design of the control
and of the filter used for reducing harmonic in the output, are detailed in the text. Are
presented the obtained results on computational simulations and the obtained results on
laboratory tests.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/20288 |
| Date | 19 June 2015 |
| Creators | Chaves J?nior, Emanoel Raimundo Queiroz |
| Contributors | 59464305800, http://lattes.cnpq.br/4823406157799513, Monteiro, Jos? Roberto Boffino de Almeida, 14947744880, http://lattes.cnpq.br/2532775927158810, Ribeiro, Ricardo L?cio de Ara?jo, 31804683434, http://lattes.cnpq.br/6628177274865696, Roda, Valentin Obac |
| Publisher | Universidade Federal do Rio Grande do Norte, PROGRAMA DE P?S-GRADUA??O EM ENGENHARIA EL?TRICA E DE COMPUTA??O, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | Unknown |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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