Controle e Análise de Estabilidade de Conversores CC-CC em Modo de Compartilhamento de Potência
DOI:
https://doi.org/10.18618/REP.2019.1.0039Keywords:
Controle droop, Controle Hierárquico, Controle mestre-escravo, estabilidadeAbstract
Neste artigo apresenta-se um estudo comparativo entre técnicas aplicadas ao controle de conversores cc-cc com saídas conectadas em paralelo. Este tipo de conexão é comum em aplicações envolvendo microrredes, em que um mesmo barramento CC é compartilhado entre diversos estágios de processamento de energia. As técnicas de controle abordadas neste artigo diferenciam-se quanto à forma de implementação, que pode ser local ou coordenado. Além de apresentarem diferentes comportamentos quanto à complexidade, robustez, modularidade e rastreamento de referência, tais técnicas influenciam a estabilidade do sistema, uma vez que alteram a impedância equivalente de saída dos conversores. A fim de avaliar tais características, o artigo compara experimentalmente as técnicas de controle do tipo droop, hierárquico e mestre-escravo, e apresenta uma análise da estabilidade em nível de eletrônica de potência, considerando um sistema composto por três conversores Boost com saídas compartilhadas.
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