无交流电流传感器的三相PWM整流器比例谐振控制策略研究

Study on the Three-phase PWM Rectifier Proportional Resonance Control Strategy for Non-AC current Sensor

提出了一种无交流电流传感器的PWM整流器PR控制方法,交流电流通过检测开关状态和直流电流进行电流重构获得,进行最小调制时间补偿控制,以确保正确重构交流电流。整流器采用空间矢量PWM电流控制,控制系统采用电压外环PI控制和电流内环PR控制结构。研究表明,该控制策略有良好的控制性能,可以实现网侧电流正弦化和单位功率因数运行。

Putforward a kind of PWM rectifier control method for PR without AC currentsensor,alternating current by detecting the switch state and reconstruct current dc current gain,Minimum modulation time compensation control to ensure that the correct reconstruction of alternating current.Rectifier using space vector PWM current control,control system adopts voltage outer loop PI control and current inner loop control structure PR,research shows that the control strategy has good control performance and can realize net side current sinusoidal and unit power factor operation.