Fast Dynamic Response Control for Bidirectional Single-stage Isolated Matrix Converter

Abstract

Bidirectional single-stage isolated matrix converter(BSMIC) has a great application prospect in battery testing and electric vehicles charging systems with the advantages of wide power transfer range and high efficiency. In battery testing systems, it also needs a fast dynamic response. This paper proposes a hybrid modulation and control strategy to realize the fast dynamic response. A hybrid modulation strategy is proposed, which consists of a seven-segments space vectors pulse wide modulation(SS-SVPWM) for the matrix converter semi-stage and a phase-shift modulation for the H-bridge semi-stage. Then, a dual-loop control strategy is proposed. Both modulation ratio and phase-shift angle are used to control the output current. Finally, simulation results verify the effectiveness of the proposed modulation and control strategy.