模块组合型多电平变换器的控制策略  

Studies on control strategies of modular multilevel converters

作　　者：杨晓峰[1] 孙浩[1] 支刚[1] 郑琼林[1] 

机构地区：[1]北京交通大学电气工程学院,北京100044

出　　处：《北京交通大学学报》2011年第2期128-132,共5页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：北京交通大学优秀博士生科技创新基金资助(141091522)

摘　　要：对模块组合型多电平变换器(MMC)的脉冲调制策略和电压控制策略进行了理论分析和实验研究,建立了MMC系统的数学模型,在此基础上提出一种适用于MMC特点的载波移相SPWM控制策略和电压控制策略,无需额外的硬件电路,即可实现对MMC功率单元直流电容电压良好的稳压和均衡控制效果.通过一台三电平MMC实验样机的实验结果,分析了其稳态和静态工作特性,验证了控制策略的有效性.This paper researches the pulse modulation and the voltage control strategies of the modular multilevel converter（MMC）.Based on analysis of the mathematics model of MMC,an optimized carrier phase-shifted SPWM modulation strategy and combination voltage control method were proposed for achieving voltage-balancing of the multiple floating dc capacitors without any external circuit.The dynamic and static characteristics were explained in detail on a three-level MMC prototype.The effectiveness of the proposed modulation strategy and the feasibility of MMC were verified by the experimental results.

关 键 词：多电平变换器 模块化 功率单元 载波移相SPWM 数学模型 

分 类 号：TM46[电气工程—电器] TM761