Transient Response Optimization of Bidirectional Dual-Active-Bridge DC/DC Converters Based on Dual-Phase-Shift

Abstract

Bidirectional power conversion plays an important role in sustainable energy generation systems, where dual-active-bridge (DAB) is a highly promising topology. However, DAB converters with traditional dual-phase-shift (DPS) can produce DC bias and hard switching during transients. In this paper, an optimized DPS control strategy for DAB is introduced which can eliminate the transient DC bias well, and can be used to maintain soft switching in the transient state. Plenty of experiments are carried out by establishing a DAB prototype. These experimental results verify the effectiveness of the proposed DPS control strategy.