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电网技术  2009 

水电机组并网运行频率调节系统的稳定性

, PP. 57-62

Keywords: 水电机组,频率稳定性,并网运行,主导时间常数

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Abstract:

在刚性联结电网模型基础上,分析了水电机组并网运行频率调节系统稳定性。随着一次调频机组及容量增加,产生了电网频率稳定性下降的问题。如果电网中存在多个小容量机组的调节系统,稳定性较差,将会引起整个电网频率调节系统稳定性下降或不稳定情况发生。因此必须重视小容量机组并入大电网运行时忽视系统稳定性的现象,足够的单机调节系统稳定性可以保证多机调节系统的稳定。当各机组调节系统主导时间常数相同时,各执行机构动作趋于同步,电网频率调节系统才会获得良好的动态品质。

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