Design for Charge–Discharge System of Battery Based on the Three-Phase PWM Rectifier

Abstract

To solve the problem of low power factor and harmonic pollution in traditional charge–discharge device, a novel configuration which consists of a three-phase voltage source PWM rectifier and Bi-directional DC–DC converter was proposed. It charges battery in rectifier mode and allows energy which is discharged by battery to feedback to power grid. A charge–discharge simulation model based on constant charge/discharge is designed. Simulation results show that the system can achieve sinusoidal input currents and reduce harmonic pollution, and at the same time achieve discharge process of energy to feedback to power gird and save energy.