Bidirectional Charging System for Electric Vehicle with Improved Power Quality

Electric vehicle (EV) connected to the electric grid can not only recharge its own battery but can also feed energy back into the grid referred to as vehicle-to-grid (V2G). This technique helps to reduce peak load, regulating voltage, balancing of the load and increase the stability of power system. In this paper a battery electric vehicle (BEV) was utilized for both charging and discharging power. Bidirectional power transfer is accomplished through a bidirectional DC-DC converter and a single-phase full bridge inverter. This topology can minimize the harmonic distortion of the grid-injected current and keep it within standards. The control method proposed in this paper provides the user with the flexibility to select the operational mode of the circuit. Simulation of this system is verified in MATLAB Simulink.