Comprehensive Analyses of Control Techniques in Dual Active Bridge DC–DC Converter for G2V Operations

Power conversion via high-frequency link (HFL) using DC–DC converters is gaining gradual popularity in Electric Vehicles (EVs) and the power sector due to their high power density, lightweight, cost-effectiveness, and reliability without conciliatory efficiency. One such promising DC–DC converter that combines bidirectional ability with energy storage and isolation is the dual active bridge (DAB). This paper presents the outcome of various control methodologies on the peak inductor current, primary and secondary side voltage of the HF transformer, and output power of a DAB converter. This converter regulates power flow in both directions by employing phase shift techniques. The traditional control techniques can be categorized as single-phase shift (SPS), dual-phase shift (DPS), and triple-phase shift (TPS). Closed-loop controlling and simulation results for all three control techniques are presented here along with a comparative analysis. It is observed that with an increase in the degree of freedom of control, both peak inductor current and switching stress reduce. As the degree of control increases, so does the overall performance of the DAB converter.