Control Strategy of TPC with A Grid Port

An isolated three-port converter (TPC) without DC-link electrolytic capacitor is studied in this paper, which is applicable to vehicle to grid (V2G) and distributed generation (DG) system. The small signal model of the converter is formulated by means of fundamental component approximation. Furthermore, a high bandwidth current controller is employed for DC power source current control which can reduce double grid frequency ripple power on the DC side. A grid-connected current controller in dq synchronous frame for both active and reactive power regulation with virtual damping compensation is presented to eliminate resonance of grid LC filter. Simulation results validate the control strategy, and experiment results will be provided in full paper.