Controle da Potência Gerada em Microrredes Autônomas e Isoladas com Fontes de Energia Renováveis e Sistema de Armazenamento com Bancos de Baterias
DOI:
https://doi.org/10.18618/REP.2014.2.152162Keywords:
Banco de baterias, Controle de Potência, Estado de Carga, Fontes Renováveis de Energia, Microrredes, Turbinas EólicasAbstract
Este trabalho apresenta uma nova estratégia para controlar a potência gerada por fontes de energia renováveis conectadas à microrredes autônomas e isoladas, que utilizam sistema de armazenamento a base de banco de baterias. O principal objetivo da estratégia de controle proposta é manter o balanço de energia dentro da microrrede para que a integridade dos bancos de baterias seja garantida, mesmo quando houver potencial para geração de mais energia do que a carga pode consumir e os bancos de baterias são capazes armazenar. Essa meta é alcançada controlando a quantidade de potência gerada dentro da microrrede, sem dissipar eventual excesso de energia gerada em cargas resistivas auxiliares e sem utilizar qualquer comunicação física entre os sistemas de controle dos conversores de potência envolvidos. A frequência elétrica da microrrede é utilizada para informar quanta potência cada fonte de energia pode gerar para que a tensão dos bancos de baterias seja mantida abaixo do seu valor máximo permitido. Um método de controle droop modificado é proposto para implementar esse tarefa.
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