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电网技术  2014 

模块化多电平换流器的容错控制策略

DOI: 10.13335/j.1000-3673.pst.2014.09.029, PP. 2497-2503

Keywords: 模块化多电平换流器,热备用,容错运行,环流抑制,数学模型

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Abstract:

为了分析模块化多电平换流器在子模块故障时系统的运行性能，建立了系统在热备用的模式下上、下桥臂不对称运行的数学模型，分析结果表明上、下桥臂不对称运行会增加故障桥臂环流中的基频成分，通过改变故障桥臂子模块的平均开关频率可抑制基频环流。分析了采取容错控制策略后系统性能及所允许的最大故障子模块数量。PSCAD/EMTDC仿真结果验证了所得结论正确性。

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