配网自动化系统小电流接地故障定位方法

Small current ground fault location method for distribution automation system

中国的配电中压网一般都是架空线使用较多,其中系统多是小电流形式,在整个电网中单相接故障占80%以上,但是在中国自动配电网中基本没有小电流的故障接地定位系统,这极大的影响了自动配电网系统的可靠性。本文将会提出一种接地小电流故障区段定位的新方法,先获取单相基地电网中的小电流故障情况,再利用边界故障区间算法计算相邻区段起点标识量和路径故障标识量。

The distribution network in China generally uses more overhead lines,and the system is mostly in the form of small currents.The single-phase connection in the entire network accounts for more than 80%of the failures,but it is basically small in China's automatic distribution network.Current fault grounding system,which greatly affects the reliability of automatic distribution network system.This article will propose a new method for locating small current fault segments in grounding.First,obtain the small-current fault condition in the single-phase power grid,and then use the boundary fault interval algorithm to calculate the starting segment identifier and the path fault identifier of the adjacent segments.