10 kV架空配电网接地故障原因模拟试验及特征分析  

Simulation Test and Characteristic Analysis of Grounding Fault Causes of 10 kV Overhead Distribution Network

作　　者：杨帆 金鑫[3] 沈煜 梁永亮 杨志淳[1,2] 薛永端 YANG Fan;JIN Xin;SHEN Yu;LIANG Yongliang;YANG Zhichun;XUE Yongduan(State Grid Hubei Electric Power Research Institute,Wuhan 430077,China;Key Laboratory of High-voltage Field-test Technique of SGCC,Wuhan 430077,China3.Control and Information School of China Petroleum University(East China),Qingdao 266580,China)

机构地区：[1]国网湖北省电力公司电力科学研究院,湖北武汉430077 [2]国家电网公司高压电气设备现场试验技术重点实验室,湖北武汉430077 [3]中国石油大学(华东)信息与控制工程学院,山东青岛266580

出　　处：《供用电》2019年第3期37-43,共7页Distribution & Utilization

基　　金：国家自然科学基金项目(51477184);国网湖北省电力有限公司科技项目(52153216001P)~~

摘　　要：配电网接地故障原因的正确辨识对线路人员的故障排查、快速抢修等具有重要意义。配电自动化的快速发展为基于故障录波数据的故障原因识别提供了可能性。针对实际10 kV配电网架空线路,对故障原因进行了更有针对性的划分,设计了避雷器击穿、绝缘子闪络、导线对横担放电以及导线落到泥土地、沙地、水塘共6种原因的接地故障模拟试验方案,进行现场试验获取对应的录波数据;通过对波形时频特征分析比较,提出表征不同故障原因波形特点的5项特征参量;提出基于KNN的配电网架空线路接地故障原因的自动识别算法。现场实际录波数据证明了提出的特征参量能够为接地故障原因识别提供有效参考。The correct identification of grounding fault causes of distribution network is of great significance for troubleshooting and emergency repair to operation and maintenance staffs.The rapid development of distribution automation provides the possibility to identify fault causes based on fault recorder data.For the actual overhead line of the 10kV distribution network, this paper designs a grounding fault simulation test plan for lightning arrester breakdown,insulator flashover,wire to cross arm discharge and wire falling into mud,sand and pond to obtain corresponding fault recorder data.Then,this paper analyzes and compares the characteristics of fault waveforms with different causes,and proposes five characteristic parameters that can be used to characterize the causes of these faults,which provides a basis for the identification of grounding fault causes.An automatic identification algorithm based on KNN for grounding faults of distribution network is proposed.The recorder data at the site proves that the proposed characteristic parameters can provides an effective reference for grounding fault causes identification of distribution network.

关 键 词：架空线路 单相接地故障 故障原因 接地试验 特征分析 配电网 

分 类 号：TM77[电气工程—电力系统及自动化]