三电平变流器多载波PWM控制技术研究  

Carrier-PWM Control Strategies of Three-Level Converters

作　　者：康劲松[1] 巫影[2] 张烨[1] 陶生桂[1] 

机构地区：[1]同济大学电子与信息工程学院,上海201804 [2]海军工程大学船动学院,湖北武汉430023

出　　处：《同济大学学报（自然科学版）》2010年第1期124-129,共6页Journal of Tongji University:Natural Science

摘　　要：对二极管箝位型和飞跨电容型两种三电平变流器拓扑的多载波PWM(脉冲宽度调制)控制策略进行研究,重点对这两种拓扑结构中存在的中点电位不平衡问题,以及不同拓扑结构所适用的多载波PWM方法,进行了理论分析和论证;通过Matlab/Simulink软件的仿真研究,分析了在不同调制度下输出电压的谐波分布和谐波畸变率,确定了载波层叠法与载波移相法的拓扑结构实用类型,论证了多载波PWM控制策略的实用性和可行性.This paper presents researches on the pulse width modulation（PWM） strategies and the principal for three-level diode-clamped and flying-capacitor converters, especially, the neutral-point unbalanced problem and the control strategies for different topological structures. An investigation was made of the harmonic wave distribution and the aberration rate of the line-voltage in different modulation rates on the basis of the Matlab/Simulink software, which determines the practical topology types in two different modulation strategies （phase disposition and phase shift ）. Both the theoretical and experimental results prove its practicability and feasibility.

关 键 词：三电平变流器 多载波PWM控制 中点电位偏离 谐波分布 

分 类 号：TM921[电气工程—电力电子与电力传动]