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模块组合型多电平变换器的控制策略

Beijing Jiaotong Daxue Xuebao/Journal of Beijing Jiaotong University(2011)

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Abstract
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.
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Key words
Carrier phase-shifted SPWM,Mathematical model,Modularity,Multilevel converter,Power unit
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