The main contribution of this paper is to present a proposal for the development of an active power filter (APF) for a wind power generation system connected to the electric grid, using the three-phase induction generator with squirrel cage rotor (SCIG). In the induction generator side converter (IGSC) the power control is done by the magnetizing current and electromagnetic torque in coordinates dq. Thus, the wind system controls the active and reactive powers, as well as performing the active filtering function in the grid currents. Harmonic compensation is performed by an algorithm applied to the grid side converter (GSC). That technique improves the power quality and keeps the voltage at DC bus. The studied system was mathematically modeled and simulated using the Matlab / Simulink software. When SCIG provides 2 kW of active power, the THD from 18,94% (without APF) was reduced to 3,93% for GSC operating with APF function.
A principal contribuição deste trabalho é apresentar uma proposta para o desenvolvimento de um Filtro Ativo de Potência (FAP) para um sistema de geração de energia eólica conectado à rede elétrica, utilizando o gerador de indução trifásico com rotor gaiola de esquilo (GIGE). Assim, o sistema de geração eólica proposto controla as potências ativa e reativa, bem como realiza a função de filtragem ativa das correntes da rede elétrica. A compensação harmônica é realizada por um algoritmo aplicado ao conversor do lado da rede elétrica. Esta técnica melhora a qualidade de energia. O sistema estudado foi matematicamente modelado e simulado usando o software Matlab / Simulink. Resultados de simulação confirmam a eficácia da pesquisa proposta.
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