三电平PWM整流器双闭环控制系统研究  

Research on Dual Closed-Loop Control of Three-Level PWM Rectifier System

作　　者：李爽 王春祥 严彩忠 

机构地区：[1]上海辛格林纳新时达电机有限公司

出　　处：《变频器世界》2012年第2期68-72,共5页The World of Inverters

摘　　要：本文对三电平PWM整流器的拓扑结构进行了分析,结合三电平PWM整流器的数学模型,提出了一种固定开关频率的控制方法。采用功率、电流的双闭环策略通过SVPWM对系统进行控制。该方法使用MATLAB/SIMULINK软件仿真,结果表明,该控制方法能保证中点电位平衡、网侧电流谐波小,具有良好的动、静态性能,实现了单位功率因数运行,通过样机实验,验证了所提方法的正确性和可行性。In this paper, base on analyzing the three-level PWM rectifier topology combined with the three-level PWM rectifier mathematical model, a fixed switching frequency dual close-loop control method was proposed. Take the power as out loop and the current inner loop as control strategy to control the system with SVPWM. The Simulation results by soft- ware MATLAB/SIMULINK shoWs that the control method can guarantee the midpoint poten- tial balance, the current harmonics of net side is smaller, it has a good static and dynamic performance, can operate under unity power factor. The correctness and feasibility of the proposed method is verified by the experiment.

关 键 词：中点箝位式三电平 PWM整流器 空间矢量调制 瞬时功率控制 

分 类 号：TM461[电气工程—电器]