基于线电压分布特征的相间短路故障测距  

Phase to phase short circuit fault location based on line voltage distribution characteristics

作　　者：朱健 董礼清 薛晨 王玮[2] 李娟 王润坤 ZHU Jian;DONG Liqing;XUE Chen;WANG Wei;LI Juan;WANG Runku(Yangzhou Power Supply Branch of State Grid Jiangsu Electric Power Co.,Ltd.,Yangzhou 225001,China;Research Center for Smart Grid,Shandong University of Technology,Zibo 255049,China;Electric Power Research Institute of State Grid Jiangsu Electric Power Co.,Ltd.,Nanjing 211103,China)

机构地区：[1]国网江苏省电力有限公司扬州供电分公司,江苏扬州225001 [2]山东理工大学智能电网研究院,山东淄博255049 [3]国网江苏省电力有限公司电力科学研究院,江苏南京211103

出　　处：《供用电》2023年第1期49-55,共7页Distribution & Utilization

基　　金：国网江苏省电力有限公司科技项目(J2020101)。

摘　　要：为提高配电网相间短路故障的修复速度、提高供电可靠性,提出一种利用线电压分布特征的配电网相间短路故障测距方法。首先,通过已有的故障区段定位技术,将故障线路划分为故障点上游区段和故障点下游区段;然后,利用配电终端的电压信息,拟合得到两区段的最小线电压分布函数;最后,联立方程组求解判断故障点位置。利用仿真数据和实际录波数据对该方法进行测试,取得了较好的测距效果。该方法的原理简单,可以通过现有的装置和系统进行应用,经济性好,具有较好的应用前景。In order to improve the repair speed of phase to phase short circuit fault in distribution network and improve the reliability of power supply,a method of phase to phase short circuit fault location in distribution network based on the characteristics of line voltage distribution is proposed.Firstly,using the existing fault section location technology,the fault line is divided into the upstream section and the downstream section of the fault point;Then,the line voltage distribution function of the two sections is fitted by using the voltage information of the distribution terminal;Finally,the simultaneous equations are solved to judge the location of the fault point.The method is tested with simulation data and recording actual data,verification results show that this method has good ranging effect.The principle of this method is simple and economical,which can be realized by using the existing devices and has a good application prospect.

关 键 词：配电网 相间短路故障 故障测距 线电压分布 函数拟合 

分 类 号：TM72[电气工程—电力系统及自动化]