Simulation of Three-Phase Voltage-Source PWM Rectifier with LCL Filter

Three-phase voltage source PWM rectifier can attenuate high frequency harmonics effectively with LCL-filter which has the advantages such as smaller inductance and less output current’s THD in contrast with traditional L-filter, and suitable for medium and high power applications. In this paper, mathematical model of PWM rectifier with LCL-filter is analyzed and dual closed-loop control structure of inner current loop and outer voltage loop is designed, then the LCL-filter‘s parameters are analyzed and designed. At last, a simulation model of the rectifier is established; the simulation results show that the grid-side currents have lower harmonic distortions and the rectifier runs at high power factor, which verify the validity of the proposed method.

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