减小PWM变频器共模电压和过电压的策略研究  

Strategy of Reducing PWM Inverter′ s Common-mode Voltage and Over-voltage

作　　者：唐丽娜[1] 戴鹏[1] 倪帅[1] 

机构地区：[1]中国矿业大学信息与电气工程学院,江苏徐州221008

出　　处：《电气传动》2013年第3期35-39,共5页Electric Drive

摘　　要：为了解决PWM变频系统中存在的共模电压和过电压问题,以二极管钳位型(NPC)三电平变频器为例,首先阐述了变频器共模电压和过电压的产生机理。在此基础上,提出一种新型共模电压和过电压抑制策略,即通过对变频器调制策略的优化抑制共模电压,并在优化后的变频器输出端加入滤波器来抑制过电压,从而达到同时抑制一个变频系统中共模电压和过电压的目的。最后,论文通过计算机仿真分析验证了此种抑制策略的有效性。In order to solve common-mode voltage and over-voltage problems in PWM converter system, take the NPC threelevel rectifier as an example, and described common- mode voltage and over- voltage generation mechanism firstly. Based on a new common mode voltage and suppression strategy were proposed, which suppress common-mode voltage by PWM optimization, and suppress over-voltage by adding inverter output filter, in order to achieve the aim of suppressing a system ＇ s common - mode voltage and overvoltage at the same time. Simulation results verify that the proposed control plot has a good balancing effect.

关 键 词：共模电压 过电压 PWM优化 滤波器 MATLAB PSPICE 

分 类 号：TM46[电气工程—电器]