Sistema De Filtragem Ativa Com Inversor Multinível Assimétrico Em Cascata De Dezenove Níveis E Controle De Tensão Nos Barramentos Cc
DOI:
https://doi.org/10.18618/REP.2006.1.017024Keywords:
Filtro Ativo Paralelo, Inversor Multinível com Células em Cascata, Qualidade de Energia ElétricaAbstract
Este artigo apresenta a implementação de um filtro ativo paralelo baseada no Conversor Multinível em Cascata Assimétrico. No esquema de controle proposto neste artigo, além de não serem necessárias fontes de tensão CC isoladas para manter constantes e balanceadas as tensões nos barramentos CC, não há a necessidade de transformadores para acoplamento com a rede. Com isso elimina-se a principal desvantagem do conversor que é requerer fontes de tensão CC isoladas com capacidade de operação em dois quadrantes ou que o acoplamento com a rede seja feito através de transformadores especiais. Um procedimento de précarga dos capacitores, necessário para evitar transitórios iniciais indesejáveis, também é discutido. Resultados experimentais são apresentados para validar o esquema proposto.
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