基于双端原理的中压电缆潜伏性故障定位方法  

Method for locating latent faults of medium voltage cables based on double-ended principle

作　　者：区伟潮 葛阳 朱延廷 高厚磊[2] 龚辉昶 OU Weichao;GE Yang;ZHU Yantin;GAO Houlei;GONG Huichang(Foshan Power Supply Bureau,Guangdong Power Grid Co.,Ltd.,Foshan 528000,Guangdong,China;College of Electrical Engineering,Shandong University,Jinan 250061,Shandong,China)

机构地区：[1]广东电网有限责任公司佛山供电局,广东佛山528000 [2]山东大学电气工程学院,山东济南250061

出　　处：《山东大学学报（工学版）》2022年第5期84-91,共8页Journal of Shandong University（Engineering Science）

基　　金：南方电网公司科技项目资助项目(030600KK52190184 GDKJXM20198132)。

摘　　要：提出一种基于小波包变换和相关性分析的中压配电电缆潜伏性故障行波双端测距方法。利用小波包变换对电缆故障相信号进行处理,提取故障特征信号,确定故障行波到达电缆双端的准确时间。通过相关性分析确定故障行波到达双端时刻的时间差,结合一般情况下的高频行波波速及行波测距公式对故障进行定位,并通过仿真验证本研究所提潜伏性故障行波双端测距方法的有效性。A traveling wave double-ended fault location method for medium voltage distribution cables was presented based on wavelet packet transform and correlation analysis. The wavelet packet transform was used to process the cable fault phase signal, extract the fault characteristic signal, and determine the accurate time when the fault traveling wave reached the cable double ends. The correlation analysis was used to determine the time difference when the fault traveling wave arrived at both ends, combined with the general high-frequency traveling wave velocity and traveling wave ranging formula to locate the fault.

关 键 词：故障定位 行波双端测距 小波包变换 相关性分析 

分 类 号：TM75[电气工程—电力系统及自动化]