Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-04-25T20:57:54Z No. of bitstreams: 1 EmanoelRaimundoQueirozChavesJunior_DISSERT.pdf: 5363568 bytes, checksum: 97255b1fe368ebcedba1b59ade2a13f4 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-04-27T00:17:41Z (GMT) No. of bitstreams: 1 EmanoelRaimundoQueirozChavesJunior_DISSERT.pdf: 5363568 bytes, checksum: 97255b1fe368ebcedba1b59ade2a13f4 (MD5) / Made available in DSpace on 2016-04-27T00:17:41Z (GMT). No. of bitstreams: 1 EmanoelRaimundoQueirozChavesJunior_DISSERT.pdf: 5363568 bytes, checksum: 97255b1fe368ebcedba1b59ade2a13f4 (MD5) 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.