Eliminating harmonic pollution and improving power factor is an essential part of the power electronics researching field. Because PWM rectifier have the virtues: high power factor and bidirectional transmission of power, the study of the three-phase PWM rectifier applying to medium and large power is becoming one of the studying hotspots on international and native. So it is essential to study the control strategy.Firstly, the paper discusses the principle of the three-phase Voltage Source Rectifier (VSR) ...