Estrutura de Controle Hierárquico para o Paralelismo de UPS de Dupla Conversão com Equalização das Temperaturas dos Capacitores dos Barramentos CC
DOI:
https://doi.org/10.18618/REP.2018.4.0001Keywords:
Controle Hierárquico, fontes ininterruptas de energia, Gerenciamento Térmico, ParalelismoAbstract
Este trabalho propõe uma estrutura de controle hierárquico que permite realizar a equalização das temperaturas internas dos capacitores de barramento de UPSs conectadas em paralelo. Os capacitores eletrolíticos, usualmente utilizados em barramentos CC, são um dos principais responsáveis por falhas em sistemas de conversão de energia, sendo que a vida útil destes componentes é sensível a elevadas temperaturas de operação. Neste sentido, com o intuito de aumentar a vida útil de sistemas ininterruptos de energia conectados em paralelo, este trabalho propõe a adição de uma malha de controle que, através da medição indireta das temperaturas das UPSs, gerencia a potência ativa que cada UPS deve fornecer, a fim de equalizar as temperaturas dos capacitores. Resultados hardware-in-the-loop são adquiridos considerando duas UPSs monofásicas de 10 kVA conectadas em paralelo e localizadas em ambientes com temperaturas distintas, comprovando o bom desempenho e a viabilidade da proposta.
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