李宁;王跃;王兆安;

• 1:西安交通大学电气工程学院

摘要(Abstract)：

三电平NPC变流器的调制策略中,双调制波载波调制策略(double modulation wave carrier-based PWM,DMWPWM)是一种可以实现全调制度和全功率因数中点电压无波动的调制策略。首先分析了已有DMWPWM策略的基本原理,推导了DMWPWM策略调制波与传统SPWM策略调制波的关系,在此基础上提出了应用于三电平NPC变流器的DMWPWM策略。然后,从输出相电压总谐波畸变率(total harmonic distortion,THD)特性、直流电压利用率以及器件开关损耗三方面对新型DMWPWM策略与传统正弦脉冲宽度调制(sinusoidal pulse width modulation,SPWM)策略进行对比,进一步阐明了所提方法特点。仿真和实验结果验证了理论分析的正确性。

关键词(KeyWords)： 三电平NPC变流器;双调制波载波调制策略;直流电压利用率;器件开关损耗

Abstract:

Keywords:

基金项目(Foundation): 国家863高技术基金项目(2012AA050206);; 新世纪优秀人才支持计划项目~~

作者(Author): 李宁;王跃;王兆安;

Email:

DOI: 10.13335/j.1000-3673.pst.2014.03.025

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