三相PWM整流器的无差拍控制算法研究

The research of deadbeat control for three-phase pwm rectifiers

本文建立了三相高功率因数PWM整流器的数学模型,并研究了其数字化的无差拍控制算法。对整流器的直流电压和功率因数的控制可以转化为对交流电流的控制。通过下一周期的电流指令值计算整流器交流电压控制律,使得正弦电流能够跟踪其指令值。然后利用空间矢量脉宽调制(SVPWM)方法得到IGBT器件的控制脉冲。该算法无需坐标变换,只需一个PI环节,参数整定容易。实验结果验证了该算法的可行性。

The paper researches the deadbeat control of the three-phase PWM rectifier based on its mathematical model. The DC bus voltage and the power factor of the PWM rectifier are controlled by three phase AC currents. The voltage control law is obtained by the referential current value in next period. Then the space vector PWM method is used controlling the pulse of the IGBTs. This method is very simple with one PI controller. The experimental results show that the algorithm is verifiable and feasible.