Minimum current stress operation of dual active half-bridge converter using triple phase shift control for renewable energy applications

With the development of renewable energy, dual active half bridge (DAHB) has been widely used in renewable energy systems. For the purpose of reducing the damage caused by excessive current stress and improve the operation performance of the DAHB, this article proposes an optimized strategy of minimum current based on the Karush–Kuhn–Tucker (KKT) method. The expressions of current stress corresponding to each mode are analyzed through mathematical derivation. Then the optimal solution of duty ratios are solved through KKT method. The proposed strategy decreases the current stress and improves the operation conditions compared to conventional single phase shift (SPS) and dual phase shift (DPS). Finally, simulation results conducted to validate the effect of proposed strategy.