Dual active bridge (DAB) converters are widely used in electric vehicles, energy storage, and DC microgrids because they support bidirectional power transfer, high power density, and soft switching. However, they face challenges such as high current stress, losses, and sensitivity to load changes and disturbances. This work proposes a new H-infinity control strategy, optimized with an advanced NSGA-II algorithm, to improve DAB performance under constant power load (CPL) conditions. The method automatically tunes controller parameters to reduce peak and RMS currents while maintaining robust stability. Simulation results confirm that the approach provides fast response, strong robustness, and improved efficiency compared to conventional controllers.
