Conjunto de controle finito para o inversor conectado à rede aplicado na suavização de distorção
DOI:
https://doi.org/10.18618/REP.2023.4.0025Keywords:
controle de corrente, controle Preditivo Baseado no Modelo, Fonte de Energia Renovável, Inversor Conectado à Rede, Rede com Tensão DistorcidaAbstract
Neste trabalho é proposto uma alteração no controle preditivo de corrente finite control set (FCS) para um inversor trifásico conectado à rede elétrica de forma a possibilitar sua operação com tensão distorcida. O controlador FCS de corrente usa o modelo do sistema em tempo discreto para predizer o comportamento futuro da corrente, e uma função custo do erro entre as predições e as referências. Esta função custo é minimizada pela de seleção direta do sinal de controle ótimo a ser aplicado no inversor. Testes experimentais foram realizados em uma bancada de 2 kW/220 V e comprovam a eficiência do sistema de controle proposto, mostrando-se capaz de manter distorção harmônica total (THD) abaixo de 5%, de acordo com a norma IEEE std 519- 2014, mesmo na condição de uma rede com tensão distorcida, para comprovar o desempenho superior do controlador proposto, foi realizado os testes experimentais em comparação com o FCS clássico. Por fim, podemos concluir que as aprimorações implementadas no algoritmo de controle possibilitaram alcançar um desempenho elevado no controle, especialmente em aplicações de conversores conectados à rede elétrica.
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