电力电缆故障检测及故障点定位方法分析  

Analysis of Power Cable Fault Detection and Fault Point Location Method

作　　者：石磊[1] 杨智伟[2] 

机构地区：[1]国网衡水供电公司,河北衡水053000 [2]华北电力大学,河北保定071003

出　　处：《内蒙古电力技术》2014年第1期97-100,共4页Inner Mongolia Electric Power

摘　　要：针对采用地埋方式的电力电缆发生故障后较架空线路更难以确定故障点位置的问题,选取有代表性的10 kV电缆发生高阻故障时故障点的定位过程实例,介绍了根据故障性质采用二次脉冲法测距并定位故障点的方法。针对电缆运行过程中出现的高阻故障,首先查阅电缆相关资料,掌握电缆的详细信息;使用万用表、绝缘电阻表判断电缆故障类型,根据故障类型确定相应的测试方法;使用故障测试仪测试电缆的长度,查看测试结果是否与资料相符,初步确定故障点距离;最后采用二次脉冲法对故障点精确定位找出故障点,剥开电缆查明电缆故障原因,以便采取相应的防范措施。该方法容易掌握,尤其对于短距离故障,测试波形更容易分析,能够迅速确定故障距离,使得电缆测试效率更高,定点定位时间更短。As the failure power buried cables are more difficult to identify the fault point location than that of overhead lines, select a representative locating fault point process instance of 10 kV cable, the author introduced a method of rangeing and locating fault point with secondary pulse method according to the fault characteristics. In view of high resistance fault cable during operation process, firstly consult and grasp the relevant cable information; secondly use the muhimeter, insulation resistance meter to determine cable fault type, according to which to determine the corresponding test methods; thirdly, use malfunction meters to the test the cable, view test results and data, and preliminary determine the fault point distance; finally, locate the fault precisely and find the fault point, stripping cable to find out the reason of cable fault, and then take the corresponding preventive measures. The method is easy to grasp, especially for short distance fault waveform analysis, and it can help determine the fault distance so quickly that the cable testing are in much higher efficiency and shorter time to fixed point and position.

关 键 词：电力电缆 故障点 故障测距 电缆长度 定位 二次脉冲法 

分 类 号：TM247[一般工业技术—材料科学与工程]