电感补偿法在交流电网绝缘故障定位中的应用

The Apply of Compensated Inductance Mothod in Insulated Fault Orientation of AC Electrified Wire Netting

针对双频法在系统分布电容较大时故障支路漏电流过小,不能被电流传感器检测到的缺陷,提出了在中性点投入电感补偿故障支路漏电流的方法,并推导出投入的补偿电感随系统分布电容变化的理论公式。通过仿真验证了该公式的正确性以及采用电感补偿法的可行性。

With the increase of system distributed capacitor,the leak current of grounding fault branch is so small that can't be detected by current sensor.This paper presents the method for launch inductance into neural point to com- pensate the leak current,and establishes the theoretic formula for the variation of the compensated inductance versus system distributed capcitor.