计及局放信号传播特性的多源局放定位算法  

Multi-source PD Location Algorithm Considering PD Signal Propagation Characteristics

作　　者：符玲[1] 刘鸿[1,2] 林圣 何正友[1] FU Ling;LIU Hong;LIN Sheng;HE Zhengyou(College of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China;State Grid Chongqing Shiqu Power Supply Company, Chongqing 400015, China)

机构地区：[1]西南交通大学电气工程学院,成都610031 [2]国网重庆市区供电公司,重庆400015

出　　处：《高电压技术》2017年第12期4060-4069,共10页High Voltage Engineering

基　　金：国家自然科学基金(51307145);中央高校基本科研业务费专项资金(2682015CX028)~~

摘　　要：为减小电缆局放定位过程中噪声干扰及反射干扰的影响,并实现多个局放源的定位,提出了一种基于局放匹配对识别及利用多组局放匹配对进行多源局放定位的算法,来提高在上述干扰工况中的定位精度。该算法利用局放信号的幅值突变特点以及在电缆中的传播特性来识别局放匹配对,再基于局放匹配对识别结果进行多源局放的定位,进而结合DBSCAN信号聚类方法来修正局放定位结果以实现对多源局放的精确定位。仿真结果表明,该多源局放定位算法能够在不同信噪比工况下,有效识别局放匹配对并精确估计出局放源的个数和位置,同时,由于利用了多组局放匹配对进行定位,其精确性比利用单组局放匹配对定位的精确性更高。In order to reduce the influences of noise interference and reflection interference in the process of cable PD location and realize location for multiple PD sources, we put forward a multi-source PD location algorithm which is based on the PD matching pair recognition to improve the locating accuracy. The algorithm uses the PD signal amplitude mutation and the propagation characteristics in cable to identify the PD matching pair, locates the multiple PD sources based on the identify results, and corrects the location results through the DBSCAN clustering method to realize the accurate location of multiple PD sources. The simulation results show that the multi-source PD location algorithm can effectively identify the PD matching pair and accurately estimate the numbers and location of PD sources in different SNR conditions Meanwhile, because multiple sets of PD matching pairs are used for location, the location accuracy is higher than that of using one set of PD matching signals.

关 键 词：局部放电 定位 传播特性 局放匹配对 多局放源 干扰 聚类 

分 类 号：TM855[电气工程—高电压与绝缘技术]