Impactos das Variações de Tensão de Curta Duração na Geração de Harmônicos por Aerogeradores Síncronos

Márcio Arvelos Moraes, José Carlos de Oliveira

Abstract

Os parques eólicos se apresentam com crescente participação nas matrizes de geração elétrica dos mais diversos países, dentre os quais o Brasil. Não obstante as constantes evoluções das tecnologias utilizadas, os complexos eólicos continuam à base dos geradores de indução e síncronos, atrelados com suas respectivas estruturas eletrônicas de conversão. Estes, dentre outros fenômenos, promovem impactos sobre os indicadores de qualidade. À luz deste fato, os agentes reguladores, através de seus documentos normativos, determinam que as autorizações aos acessos somente são concedidas após a aprovação dos estudos de impactos, em cujo cenário está inserida a questão das distorções harmônicas provocadas nas redes de conexão. Também, após o comissionamento das instalações, há ainda necessidade de estudos pós-operatórios, quando são empregados bancos de dados advindos de medições e não mais dos fabricantes. Sob tais circunstâncias, os conteúdos espectrais podem evidenciar alterações das amplitudes das ordens harmônicas características, e ainda, o surgimento de outras frequências não previstas, principalmente quando as redes de interligação se apresentam com anomalias. Neste cenário, o presente trabalho tem por meta apresentar resultados ...Continue Reading

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