Observador Por Modos Deslizantes Aplicado No Controle Das Tensões Equivalentes Dos Polos Em Conversores Multiníveis Modulares
DOI:
https://doi.org/10.18618/REP.2017.3.2697Keywords:
Controle das Tensões Equivalentes, Conversor Multinível Modular, Observador por Modos DeslizantesAbstract
Este artigo propõe um observador por modos deslizantes aplicado no controle das tensões equivalentes dos polos de conversores multiníveis modulares (MMC) em aplicações com elevado número de submódulos conectados em série, com o objetivo de reduzir a complexidade do sistema de comunicação. Esta técnica é utilizada no sistema de controle do MMC, possibilitando uma implementação mais simples, uma vez que não é necessário o envio das tensões de todos os capacitores para o processador central. O observador proposto possui um termo adicional que permite um melhor desempenho transitório, ao contrário de observadores por modos deslizantes já propostos. Adicionalmente, uma análise de estabilidade por Lyapunov é apresentada juntamente com a definição dos ganhos do observador. Resultados de simulação e experimentais são incluídos para demonstrar o adequado desempenho do observador com o sistema de controle do MMC sob diferentes condições de operação.
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