基于EMD特征识别的接触网绝缘子泄漏电流在线检测  

Online Detection of Leakage Current of Contact Network Insulators Based on EMD Feature Recognition

作　　者：刘德天 于瀚 李铁鑫 汪洪浩 LIU Detian;YU Han;LI Tiexin;WANG Honghao(Jinzhou Power Supply Section,Jinzhou 121000,China;Changchun High-speed Railway Infrastructure Section,Changchun 130000,China)

机构地区：[1]锦州供电段,辽宁锦州121000 [2]长春高铁基础设施段,吉林长春130000

出　　处：《电工技术》2025年第5期183-185,188,共4页Electric Engineering

摘　　要：常规的接触网绝缘子泄漏电流在线检测方法主要使用ESDD等值附盐密度提取泄漏表征,易受电流幅值表征变化影响,导致泄漏电流检测偏差较高,因此提出一种基于EMD特征识别的接触网绝缘子泄漏电流在线检测方法。利用EMD特征识别处理绝缘子泄漏电流检测信号,分析接触网绝缘子泄漏电流频域特性,从而完成绝缘子泄漏电流在线检测。实验结果表明,在不同编号绝缘子下,设计的接触网绝缘子电流在线检测方法检测的泄漏电流与实际泄漏电流较接近,偏差较小,检测性能良好,有一定的应用价值,为解决接触网绝缘子安全问题、降低接触网运行维护难度作出了一定的贡献。The conventional online detection method for leakage current of overhead contact line insulators mainly uses ESDD to extract leakage characterization,which is easily affected by changes in current amplitude characterization,resulting in high leakage current detection deviation.Therefore,a new online detection method for leakage current of overhead contact line insulators based on EMD feature recognition is proposed.By utilizing EMD feature recognition to process insulator leakage current detection signals,analyzing the frequency domain characteristics of contact line insulator leakage current,online detection of insulator leakage current has been completed.The experimental results show that under different numbered insulators,the leakage current detected by the designed online detection method for contact network insulators is close to the actual leakage current,with small deviation and good detection performance.It has certain application value and has made a certain contribution to solving the safety problem of contact network insulators and reducing the difficulty of contact network operation and maintenance.

关 键 词：EMD特征识别 接触网 绝缘子 泄漏电流 在线检测 

分 类 号：U225.8[交通运输工程—道路与铁道工程]