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模块化多电平变流器稳态运行特性分析

, PP. 90-99

Keywords: 模块化多电平变流器,稳态,环流,通用矩阵方程

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Abstract:

在考虑桥臂电流包含所有次谐波成份的基础上,提出一种新的模块化多电平变流器(MMC)稳态运行特性分析方法。通过研究分析MMC内部各电气变量间的耦合关系,推导得出系统通用矩阵方程,进而得到桥臂电流、子模块电容电压、相间环流等电气变量解析表达式,并总结了各变量稳态运行规律。该方法计算过程相对简单,计算结果更为精确。基于23电平MMC背靠背平台的仿真、实验结果与理论分析结果对比,证明了所提方法的可行性与可靠性。

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