A rapid charging system with bi-directional power flow for plug-in hybrid electric vehicle
This paper presents the rapid battery charging system with bidirectional power flow capability of Plug-in-Hybrid Electric Vehicle (PHEV) application. Rectangular Phase Shift with PWM (RPPWM) is used for Zero Voltage Switching (ZVS) based Dual-Active-Bridge, controls the power flow capability in both direction and reduces the control complexity. Boost converter is fed from the rectified ac mains voltage to regulate the constant output DC voltage at desired level and to improve the power factor. The proposed boost converter provides the bidirectional power flow, DAB is implemented. It chooses either the Constant-Current or Constant-Voltage approach and operates using RPPWM and Proportional-Integral controllers by which system complexity is reduced. The system could charge the battery from C.C to C.V smoothly which leads to a longer life cycle and safe operation of battery. In proposed control method, SOC reaches maximum value within 56.4 minutes which is less compared to that of the time. The charging/discharging response of the proposed system is tested and verified through simulation Study is performed in MATLAB/SIMULINK.