Disturbance Rejection and Harmonic mitigation for Solid State Transformer through Passivity Based Control

Abstract

This research proposes the passivity based control (PBC) design for the 2-stage solid state transformer (SST) (comprising of dual active bridge converter and dc/ac inverter). The design ensures the asymptotic convergence of the tracking error to zero and the robustness against input voltage sag/swell and also for the load disturbances. In addition, the design facilitates the mitigation of voltage harmonics for inverter. The performance of the passivity based controller is demonstrated through simulations using MATLAB/Simulink.