10kV电缆故障测距及定位典型案例分析  

Typical cases analysis of 10kV cable fault location

作　　者：陶宇航[1] 张熹 宫祥龙 TAO Yuhang;ZHANG Xi;GONG Xianglong(Chengxi District Supply Company,State Grid Tianjin Electric Power Company,Tianjin 300113)

机构地区：[1]国网天津市电力公司城西供电分公司,天津300113

出　　处：《电气技术》2022年第2期88-93,共6页Electrical Engineering

摘　　要：随着社会经济的不断发展,城市配电网中的电缆线路占比越来越大。当电缆发生故障时,由于放电位置在地层下,需要首先进行故障定位才可进行修复。本文结合六起10kV中压电缆故障,通过低压脉冲法、冲闪法及二次脉冲法分析波形数据,进行故障点位初步测距;再通过声磁同步法,精确定位故障点。最后,将电缆故障部分进行解剖,分析具体故障原因,为中压电缆终端在电力系统中安全、稳定运行提供依据。With the continuous development of social economy,cable lines account for an increasing proportion of urban power supply networks.Because the discharge location is usually under the soil layer when a cable faults,it is necessary to locate the fault first before it can be repaired.This article combines six 10kV medium voltage cross-linked polyethylene cable faults,analyzes the waveform data through the low-voltage pulse method,the flash method and the secondary pulse method,and conducts a preliminary distance measurement of the fault point;and uses the acousto-magnetic synchronization method to accurately locate the fault location.Finally,the fault part of the cable is dissected,and the specific cause of the fault is analyzed to provide a basis for the safe and stable operation of the medium-voltage cable terminal in the power system.

关 键 词：中压电缆 故障定位 波形分析 配电网 

分 类 号：TM75[电气工程—电力系统及自动化]