小电流接地系统单相接地选线方法分析与探讨

分析了现有小电流接地系统发生单相接地故障选线方法的优缺点、适用范围以及影响其准确性的因素,总结了现有选线方法中的两大矛盾:单相接地故障复杂性与选线方法单一性;故障信号信息多样性与信息利用量低之间的矛盾。为提高单相故障选线准确性提供思路。

This paper analyses deeply the reasons ,advantage and disadvantage,serviceable range that effect fault line detection accuracy and dependability from the one-phase-to-ground fault line detection theory for indirect grounding power system.We find two main contrediction：The conditions of one-phase-to-ground fault is too complex while the signal get from fault line detection is too limted;The message of the fauh signal is variable while the efficiency of message＇ use is too poor.This paper provide a new wey of thinking to improve the accuracy of fault line detection.