低压配电网单相接地故障行波自动检测方法研究  

Research on Fault Traveling Wave Automatic Detection Method for Single Phase to Ground in Low-Voltage Distribution Network

作　　者：刘禹志 计蕴宁 马健 LIU Yuzhi;JI Yunning;MA Jian(Yitong Manchu Autonomous County Power Supply Company,State Grid Jilin Electric Power Co.,Ltd.,Siping,Jilin 130000,China)

机构地区：[1]国网吉林省电力有限公司伊通满族自治县供电公司,吉林四平130000

出　　处：《自动化应用》2025年第6期153-155,共3页Automation Application

摘　　要：针对现有方法在复杂环境中检测故障行波信号误差较高的问题,提出了一种低压配电网单相接地故障行波自动检测方法。该方法先对故障行波进行了采集,然后利用变分模态分解技术对故障行波信号进行分解,最后基于Teager能量算子标定故障波头的位置,应用故障录波器记录并分析数据,以实现低压配电网单相接地故障的精确检测与定位。结果表明,该方法的检测灵敏度高于0.90,定位准确率高于98.5%,响应时间不超过0.35 ms,证明其检测效果较好。Addressing the issue of high error rates in detecting fault traveling wave signals in complex environments using existing methods,an automatic detection approach for single phase to ground fault traveling waves in low-voltage distribution networks is proposed.This method initially collects the fault traveling waves and then utilizes variational mode decomposition to decompose the fault traveling wave signals.Subsequently,the Teager energy operator is employed to pinpoint the location of the fault wavefront.Fault recorders are used to record and analyze the data,enabling precise detection and localization of single phase to ground faults in low-voltage distribution networks.The results indicate that the detection sensitivity of this method exceeds 0.90,with a positioning accuracy higher than 98.5%,and a response time of less than 0.35 ms,demonstrating its effectiveness in detection.

关 键 词：低压配电网 单相接地 故障行波 自动检测 变分模态分解 

分 类 号：TM75[电气工程—电力系统及自动化]