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电网技术  2011 

一种综合频率扫描和复转矩系数的次同步谐振风险定量评估方法

, PP. 101-105

Keywords: 次同步谐振,频率扫描,复转矩系数

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Abstract:

针对串补输电系统的次同步谐振(SSR)风险,本文提出了一种综合频率扫描和复转矩系数的定量评估方法,它首先利用阻抗—频率扫描获得串补输电网的简化等值模型及其参数,然后根据复转矩系数法推导出机组各扭振模式的阻尼显式表达式,兼顾了轴系机械阻尼和电气阻尼。实例研究表明该方法与特征根分析法的结果一致,但它的原理简洁直观、计算量小,且为机网参数的显式函数,能对多机组和多模式SSR提供直接、精确和定量的阻尼结果,可应用于工程上多机组、多串补和多个电压等级复杂电网的SSR风险评估。

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