三电平PWM整流器双闭环系统设计与仿真

三电平PWM整流器多采用电压控制外环和电流控制内环组成的双闭环控制系统,电压外环的作用,是根据直流电压Vdc的大小决定三电平PWM整流器输出功率的大小和方向,以及三相电流给定信号。电流内环的作用,是使整流器的实际输入电流能够跟踪电流给定,实现单位功率因数或功率因数可变。本文主要研究了三电平PWM整流器的系统设计,并进行了仿真。结果表明,设计的双闭环系统具有良好的抗扰动性能,动态响应也得到了明显的改善。

The Design and Simulation of Three-level PWM Rectifier Based on the Double Closed Loop

The model of three-level PWM rectifier is usually designed based on the double closed loop of voltage outer and current inner. The outer-voltage decides the size of three-level PWM rectifier output and the direction of three-phase Current reference signal. The current internal tracks the current number. This major studies three-level PWM rectifier system design and simulation, the results show that the design of the double closed loop system has good performance, the disturbances have also been active response to a marked improvement.