三电平PWM整流器几个关键问题的分析

Research and Simulation of Three-level PWM Rectifier

对三电平PWM整流器的拓扑结构进行了分析,采用了电压、电流的双闭环策略对系统进行控制,介绍了调节器参数的工程选择方法。系统采用电压空间矢量脉宽调制(SVPWM)技术,对其异于两电平SVPWM的部分作了详细分析,给出了空间矢量扇区的判断依据以及中点电位波动控制策略等。利用所述方法对系统进行了仿真分析,验证了系统的正确性,确定了调节器的参数,在此基础上使用TMS320F2812型DSP作为主控芯片完成了样机的研制,取得了不错的效果。

Three-level PWM rectifier topology is analyzed,using the voltage and current double closedloop control strategy to adjust this system,engineered regulator parameter selection method is introduced.This article describes the three-level voltage space vector pulse width modulation（SVPWM） technique,some detailed analysis is got about the different from the aspects of the two-level SVPWM,the judgment of the sectors and the control strategies of the mid-point potential are given,then,using the method to simulink the system.Through the simulation,the correctness and determine the parameters of the regulator are proved,on this basis,using TMS320F2812 DSP as the main chipbased,prototype development is completed,and obtain a satisfactory results.