电网变化对零序电流保护灵敏性影响的分析

Analysis m Sensihvity of Zero Sequence Current Relay Affected by Change Network Component

分别讨论了当电力系统主要元件如发电机、变压器、线路停运或投运时 ,系统正、负、零序网络等值阻抗的变化 ,从而分析接地故障时 ,通过开关的零序电流的变化及对零序电流保护产生的影响 ,得出了一般性的结论 ,对继电保护整定计算和运行管理工作具有实际意义 .

This paper discuss the change of three sequence networks when major components such as generator, transformermerm, line is cut or not in power system. The change of zero sequence current through fault point and switch is analysed,the influence to zero sequence current relay is discussed and the general conclusion is got.