三电平电压型PWM整流器

Three-level Voltage Source PWM Rectifier

在整流电路中,PWM技术可实现功率因数补偿、谐波补偿、四象限运行,输出电压可调节等性能,同时具有体积小、重量轻、动态响应速度高等优点。基于大功率考虑,对三电平电压型PWM整流电路进行了分析。在控制方法上选择了电流前馈解耦矢量控制,通过旋转坐标变换实现网侧无功和有功的独立控制,并通过仿真和实验验证了控制算法的可行性。

PWM technology which is applied to the rectifier can achieve the power factor compensation,harmonic compen-sation and the four-quadrant operation.It has adjustable output voltage performance with small size,light weight,high speed dynamic response.Based on the high-power considerations,the three-level voltage source PWM rectifier is analyzed.On the choice of control method in the current feed-forward decoupling vector control methods,coordinate transformation can achieve independent control of the net reactive power and active power.Simulation and experiment verify the feasibili-ty of control algorithm.