Proteção Direta de Sobrecorrente no Controle de uma Microgrid Trifásica
DOI:
https://doi.org/10.18618/REP.2015.2.185194Keywords:
Gerador Distribuído, Limitador de Corrente, Microrrede, Proteção, MicrogeraçãoAbstract
A demanda por energia mais limpa e os avanc¸os nos procedimentos de conexa˜o de unidades de microgerac¸a˜o a` rede de distribuic¸a˜o contribuem para maior participac¸a˜o dessas no sistema ele´trico. Por isto, este artigo propo˜e um novo esquema de limitac¸a˜o de corrente por meio de uma malha auxiliar de controle, que permitira´ limitar a corrente nas unidades sem as desconectar e tambe´m alterar a divisa˜o de carga estabelecida pelos paraˆmetros de controle. Especificamente para o me´todo de controle utilizado, a protec¸a˜o de sobrecorrente limita a corrente fornecida, uma vez que a malha interna de controle de corrente na˜o a faz. A malha de protec¸a˜o proposta na˜o pretende substituir os conhecidos limitadores de corrente de falha. Os resultados de simulac¸a˜o e experimentais de uma microrrede com duas unidades trifa´sicas de microgerac¸a˜o, trabalhando no modo ilhado ou conectado, demonstram a efetividade do me´todo.
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