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.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第1期124-129,共6页
Journal of Tongji University:Natural Science
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
three-level inverters
carrier-PWM strategies
neutral-point departure
harmonic-wave distribution
