三相电压型PWM逆变器双闭环控制策略研究

Research on Double Closed-Loop Controlling Strategy Based on Three-Phase Voltage Source PWM Inverter

提出了一种基于三相电压型PWM逆变器的电压电流双闭环控制方法。通过建立三相电压型PWM逆变器在两相同步旋转坐标系下的数学模型,引入电压电流双闭环控制方法,利用电压外环实现对输出电压的稳定控制,电流内环实现对输出电流的控制,并用SIMLIMNK建模。仿真结果证明电压电流双闭环控制方法可有效地改善逆变器的动态响应及抗扰能力。

This paper puts forward a voltage and current double closed-loop control- ling method based on three-phase voltage source PWM inverter. Through the math model of three-phase voltage source PWM inverter on two-phase synchronous rotating coordinates, the double closed-loop controlling method is introduced. The output voltage＇can be stably controlled by the outside loop of voltage, the output current can be controlled by the current inner loop, and the model can be established by the SIMLIMNK. ,It is.verified that the dynamic response and intederence rejection ability of the inverter can effectively be improved by the voltage and current double closed-loop controlling method.