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基于模块组合多电平变换器的STATCOM及其控制

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Keywords: 模块组合多电平变换器,静止同步补偿器,功率单元,无功发生,负序平衡

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Abstract:

本文提出一种基于模块组合多电平变换器(ModularMultilevelConverter,MMC)的新型综合补偿装置M-STATCOM,具有模块化、体积小、损耗低、等效开关频率高等优点,无需工频变压器即可直接应用于中高压电网。M-STATCOM不仅能工作于无功发生工况实现对电网的无功补偿,也适用于三相不平衡系统电能质量问题的综合治理应用。本文详细分析了M-STATCOM的结构特点和工作原理,在此基础上提出了无功发生工况和综合补偿工况两种工况下的控制方案。实验结果表明了本文提出控制策略的有效性和理论分析的正确性。

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