Conversor trifásico bidirecional de três níveis com alto fator de potência para aplicação em sistemas de recarga de baterias de veículos elétricos

Abstract

This paper proposes a bidirectional three-phase and three-level converter (3L-SNPC) and proposes its application to a charging station for electric vehicles. The proposed converter is capable of operating at high power factor either as a DC-to-AC converter or as an AC-DC converter employing the same control and modulation strategy. The converter has the advantages of providing three voltage levels in each leg, the voltages in all semiconductors are equal to half of the total voltage of the DC bus and the voltages in the DC bus capacitors are balanced. Current and voltage control circuits are properly presented to ensure a high power factor and low THD. In order to validate the study, simulation results for the converter with total power of 15 kW are presented and widely discussed.