Desenvolvimento de hardware para balanceamento de fases em microrredes isoladas

Gabriel De SousaShigeaki Leite de Lima

Abstract

Com o aumento na Geração Distribuída (GD) no Sistema Interligado Nacional (SIN) associado ao conceito de smartgrids se tornam presente, as microrredes inteligentes, têm surgido em várias países e com alguma penetração no Brasil. Há um avanço da GD Solar para uso residencial, no qual a geração de energia é injetada diretamente na rede de distribuição, sendo que o controle do balanceamento de corrente nas fases está diretamente associado a fase que a unidade consumidora está conectada, havendo um controle por parte da empresa de distribuição. Todavia, há casos particulares que são as microrredes isoladas, aquelas que não estão conectadas a rede de distribuição, possuindo geração, por meio de geração solar ou eólica ou sistemas híbridos, e com banco de baterias e conversores para à formação da rede. Nesses casos o balanceamento de corrente nas fases se torna importante, pois os conversores são setados, a não permitir sobrecargas acima de 25 % por fase. Neste trabalho é apresentado um hardware para o balanceamento automático de fases, de forma a preservar a vida útil dos conversores, reduzir o número de desligamentos por sobrecarga, além de reduzir as perdas no ponto de conexão da microrrede.

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