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向无源网络供电的双端柔性直流输电系统小信号稳定性分析

DOI: 10.13334/j.0258-8013.pcsee.2015.10.005, PP. 2400-2408

Keywords: 无源网络,柔性直流输电,小信号稳定性分析,同步旋转坐标系,灵敏度分析

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Abstract:

小信号稳定性分析是柔性直流输电系统设计、工程建设及运行的前提,针对无源网络供电的双端柔性直流输电系统小信号稳定性展开研究。首先通过同步旋转坐标系的灵活选择与转换,推导系统各环节的线性化方程,建立不受交流系统短路容量限制的全局小信号模型,并通过电磁暂态仿真与小信号模型仿真对比,验证其正确性。基于该模型,采用模态分析法对系统稳定性进行分析,并提出灵敏度分析方法,用于识别系统不稳定性的症结。通过案例分析及仿真,证明该分析方法具备良好的准确性。

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