CPS-SPWM在模块组合多电平变换器中的应用
Beijing Jiaotong Daxue Xuebao/Journal of Beijing Jiaotong University(2011)
Abstract
模块组合多电平变换器(MMC)是一种新的拓扑结构,MMC的输出波形为多电平,有效降低了开关器件的物理开关频率和开关损耗;MMC所特有的模块化结构使其设计灵活,利于普及.本文分析了MMC的结构和工作原理,研究了载波移相脉宽调制技术(Carrier Phase-Shifted SP-WM,CPS-SPWM)在MMC中的应用特点,在此基础上提出了CPS-SPWM在MMC中的具体实现方法,仿真结果表明基于CPS-SPWM的MMC具有较大的传输带宽和较高的等效开关频率,有效抑制和消除了低次谐波,CPS- SPWM是一种适合于MMC的调制技术.
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Key words
Carrier phase-shifted SPWM,Modularity,Multilevel converter,Signal distribution
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