2011-03-302011-03-302009-18-11NASCIMENTO, André Cavalcante do. Avaliação de estratégias de controle de potência reativa de aerogeradores síncronos em redes elétricas. 2009. 83 f. Orientador: Marcus Vinicius Alves Nunes; Coorientador: Ubiratan Holanda Bezerra. Tese (Doutorado em Engenharia Elétrica) - Instituto de Tecnologia, Universidade Federal do Pará, Belém, 2009.Disponível em: http://www.repositorio.ufpa.br:8080/jspui/handle/2011/2062. Acesso em:.http://www.repositorio.ufpa.br:8080/jspui/handle/2011/2062In the present work a methodology of reactive power injection in electric grids during voltage dips provoked by short-circuit, in connected wind farms, adopted at some countries with technological maturity in the production of wind energy in the world is evaluated. In the developed studies, the direct drive synchronous wind generator was used with full converter due to the high controllability of the converter connected to the electric grid and for possessing high capacity of reactive power supply, compared to other wind generators technologies. In Brazil, the grid code to connect wind farms to the electric grids, defined by the National Operator of the Electrical System, doesn't stipulate yet the need of adoption of such methodology during faults in the electric grid. It just specifies the ride through apability curve for voltage dips that the wind generators should follow to avoid the trip of the undervoltage relay. Criteria of the synchronous wind generators protection are evaluated starting from short-circuit simulations in a test grid with adoption of the Brazilian grid code, without reactive power injection, being compared with those of other countries that adopt reactive power injection curves.porAcesso AbertoAerogeradores síncronosControle de potência reativaNormas de interligação de parques eólicosControle de tensãoCapacidade de sobrevivência a sobretensõesProteção de aerogeradoresSynchronous generators wind turbineReactive power controlGrid codesVoltage controlRide through the faultWind turbine protectionTeseCNPQ::ENGENHARIAS::ENGENHARIA ELETRICA::SISTEMAS ELETRICOS DE POTENCIA::GERACAO DA ENERGIA ELETRICACNPQ::ENGENHARIAS::ENGENHARIA ELETRICA::SISTEMAS ELETRICOS DE POTENCIA::MEDICAO, CONTROLE, CORRECAO E PROTECAO DE SISTEMAS ELETRICOS DE POTENCIACNPQ::ENGENHARIAS::ENGENHARIA ELETRICA::SISTEMAS ELETRICOS DE POTENCIA::MAQUINAS ELETRICAS E DISPOSITIVOS DE POTENCIA