A Dynamic Phase-Shift Control Method to Suppress Current DC Bias for Bidirectional Dual-Active Bridge Converter

This paper presents a method for suppressing transient dc bias of inductor current in dual-active bridge (DAB) converters, which is applicable to the frequently used modulation methods. The suggested method is applicable to widely adopted modulation techniques. Through the independent implementation of dynamic volt-seconds balancing for each half-bridge independently, the inductor current can swiftly attain the novel reference steady state while greatly suppressing transient dc-bias components. Concurrently, this method can eliminate the narrow pulse phenomenon. To validate the effectiveness of the suggested control strategy, simulations are performed.