Encontro de Energia no Meio Rural

Resumo

MARTINS, Geomar Machado, POMILIO, José Antenor e VENDRUSCULO, Edson A. Inversor comutado em baixa frequência para aplicação de cacs na geração distribuída. In Anais do 5º Encontro de Energia no Meio Rural, 2004, Campinas (SP) [online]. 2004 [citado 04 Maio 2024]. Disponível em: <http://www.proceedings.scielo.br/scielo.php?script=sci_arttext&pid=MSC0000000022004000200010&lng=pt&nrm=iso> .

The connection of Fuel Cell Power Plants with the utility grid generally needs an electronic power converter for processing the locally generated power and injecting current into the system. Since the source provides a DC voltage, the converter must be able to produce a low-distortion, high-power factor AC current. This paper presents the results obtained with use of a three-phase and a single-phase inverter using low-frequency commutation. An auxiliary circuit is added to the inverter topologies in order to reduce the output voltage distortion, thus improving the current waveform. The main advantages of this approach are the minimization of the switching losses (i.e. high efficiency) and the elimination of the EMI (which avoids high-frequency filters necessary in high-frequency commutation inverters).