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电网技术  2006 

输电线路分布参数频率特性对能量平衡保护的影响

, PP. 35-39

Keywords: 能量平衡保护,输电线路,分布参数,频率特性,电力系统

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Abstract:

能量平衡保护通过比较2种计算方法获得的线路输入能量的差异来区分区内外故障,一种方法是实测能量,另一种方法是基于无内部故障的线路分布参数模型计算其能量消耗。文章分析了输电线路零序参数和正序参数的频率特性,说明了正序参数中仅电阻随频率升高而增大,电感和电容基本不变。从而在理论上证明了采用对应正序参数模分量的能量平衡保护的性能基本不受输电线路分布参数频率特性的影响,此结论得到了ATP仿真结果的验证。

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