模块化多电平换流器冗余运行控制策略研究
IEEE Transactions on Power Electronics（2015）
Abstract
冗余子模块(SM)是保证模块化多电平换流器(MMC)正常稳定运行的前提.介绍了MMC含冗余SM的工作原理和数学模型,分析了3种SM冗余保护方案,提出MMC动态冗余运行方案.为抑制SM电容电压波动,提出能量均衡控制及基于电容电压排序算法的调制策略.基于Matlab/Simulink所构建模型的仿真结果表明,动态冗余控制策略可保证冗余SM正常参与工作并保持电容电压稳定,系统整流侧可输出良好的直流电压.
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Key words
redundant operation control strategy
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