Estimativa de Impedância para Suporte de Estabilidade e Qualidade de Energia em Inversores Conectados à Rede
DOI:
https://doi.org/10.18618/REP.2022.2.0004Keywords:
Amortecimento ativo, Análise de Estabilidade, Controle Adaptativo, Estimação de impedância, Método de Newton-RaphsonAbstract
Este trabalho propõe um método de estimação da impedância de rede adequado a sistemas de geração distribuída conectados à rede por meio de inversores. O procedimento é baseado em variações nas potências ativa e reativa injetadas no sistema de potência pelo inversor. As variações provocam alterações nos valores de tensão e corrente no Ponto de Acoplamento Comum (PAC). Essas alterações são usadas para estimar a resistência e indutância da rede através de análise numérica de Newton-Raphson. Além disso, a estimativa da impedância é usada para adaptar uma técnica de amortecimento ativo do sistema de controle do inversor. O método proposto é verificado por meio de simulações no ambiente PSIM e experimentalmente em tempo real por meio de plataforma de testes Hardware-in-the-Loop (HIL).
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