基于故障相电流的接地选线保护原理及应用研究

Application and Principle of Ground Wire-selecting Protection Based on Breakdown Phase Current

对现有几种小电流接地(漏电)保护原理及在选线保护应用进行了分析比较,提出了基于故障相电流的接地选线保护原理和选线判据,能较好地解决馈线自动化中单相接地故障区段的识别和定位问题。

This paper analyses and compares several existing principles of little current ground （leakage） protection in addition to the application of wire selecting protection. The ground wire-selecting protection principles based on breakdown phase current as well as the wire-selecting criterion are put forward, which solves the discernment and position problems for the single-phase ground connection breakdown zone in feedback current automation.