Input current-ripple reduction technique for two-stage single-phase inverter based on double channel current feedback

Abstract

A two-stage single-phase inverter tends to draw an ac ripple current at twice the output frequency which will decrease the performance of the inverter. In this paper, based on back current gain model, an active input ripple current reduction technique with double channel current feedback is proposed by modifying the conventional voltage and current double-loop control method. The double channel current feedback is based on the original dual loop to add a current suppression channel. Finally, simulation results with this control method were provided for verification.