Sistema de Controle Multi-Malhas para Inversor Multiníveis Quasi-Z-Source com uma Única Fonte de Entrada
DOI:
https://doi.org/10.18618/REP.2019.2.0049Keywords:
Controle de malhas em cascata, Conversor cc-ca, Filtro LCL, Inversor multinível em cascata (CMI), Inversor quasi-Z-source (qZSI), Sistema de potência fotovoltaicaAbstract
Uma estratégia de controle baseada na estrutura de malhas em cascata e controladores Proporcional-Integral (PI) e Proporcional-Ressonante (PR) é proposta e apresentada para o inversor Quasi-Z-Source em Cascata com uma Única Entrada (SS qZS-CMI). Este inversor serve como interface para um arranjo fotovoltaico (FV) com um pequeno número de painéis conectados em série. A estratégia de controle proposta permite a injeção de corrente
na rede monofásica com alta qualidade, proporcionando o equilíbrio das tensões dos barramentos de cada módulo inversor e o rastreamento do ponto de máxima potência do arranjo. Resultados experimentais de um protótipo de um inversor SS qZS-CMI com cinco níveis comprovam o desempenho do sistema e os benefícios do emprego desta topologia em relação a outros inversores multiníveis.
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