一种新型级联型变换器三角载波控制算法的仿真分析  

Research on a new Triangular Carrier Control Algorithm of Cascaded Multi-level Converter

作　　者：龙庆文[1] 欧阳红林[1] 丁伟[1] 谭玉东[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《变流技术与电力牵引》2008年第4期16-19,60,共5页Converter Technology & Electric Traction

基　　金：湖南省科技厅科技计划-功率单元级联型中高压变频器的研究(计划编号:06CK3005)

摘　　要：级联型多电平变换器作为一种应用于高压大功率变换场合的新型变换器,其控制方法是当前的一个研究热点。基于现有的研究成果和控制自由度组合思想,讨论了一种已有的多电平变换器三角载波PWM控制方法,根据它的优缺点,提出了一种适用于级联型多电平变换器的新型PWM方法,介绍了其原理和特点。为了比较新旧算法的控制效果,采用功能强大的Matlab软件进行仿真研究,仿真结果表明,所提出的新方法不仅保持了原有的良好谐波特性,而且能够有效提高直流电压利用率,减少开关损耗。Cascaded multi-level converter is a novel converter used in high voltage and high power application field. And its corresponding control algorithm is a research hot points.Based on current research results and the thoughts of control degrees of freedom combination, the paper discusses a existing triangle carrier PWM methods of multi-level converter firstly.According to its advantages and disadvantages,a new kind of PWM strategy is presented, which is suitable for cascade multilevel converters. In order to compare the control effects of them, some simulations have been done by the powerful Matlab simulation software. The simulation results show the new proposed method can not only keep a good harmonic characteristics, but also efficiently improve dc voltage utifization and reduce switching loss.

关 键 词：多电平变换器 三角载波 自由度 控制性能 仿真 

分 类 号：TM464[电气工程—电器]