架空配电线路故障电弧的电磁辐射特性及故障定位应用  

Electromagnetic Radiation Characteristics of Overhead Distribution Line Fault Arc and Their Fault Location Application

作　　者：杨庆[1] 齐玥 韦思宇 王科 刘红文 YANG Qing;QI Yue;WEI Siyu;WANG Ke;LIU Hongwen(State Key Laboratory of Power Transmission Equipment&System Security and New Technology(Chongqing University),Shapingba District,Chongqing 400044,China;Nanning Power Supply Bureau,Guangxi Power Grid Company Limited,Nanning 530000,Guangxi Zhuang Autonomous Region,China;Electric Power Research Institute of Yunnan Power Grid,Kunming 650217,Yunnan Province,China)

机构地区：[1]输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆市沙坪坝区400044 [2]广西电网有限责任公司南宁供电局,广西壮族自治区南宁市530000 [3]云南电网有限责任公司电力科学研究院,云南省昆明市650217

出　　处：《中国电机工程学报》2024年第1期353-361,I0029,共10页Proceedings of the CSEE

基　　金：国家自然科学基金项目(52077019)。

摘　　要：针对架空配电线路电弧接地故障点定位难题,该文研究架空配电线路故障电弧的电磁辐射特性,探索基于电磁辐射信号的电弧故障定位方法的可行性。通过10 k V配网真型故障模拟试验平台,分析接地电弧电磁辐射的时域与频域特性及传播衰减规律,结果表明:电弧电流的电磁辐射特征频段为20~30 MHz,该特征频段不会受到中性点接地方式、电弧接地介质与线路结构参数的显著影响,且特征频段内辐射信号在传播过程中衰减较慢。在此基础上,设计一种小型化三角形单极子–环形组合平面天线,工作频率为20~500 MHz。利用自制天线开展小型电弧故障定位实验,为后续配网电弧故障定位的应用研究提供基础。It is difficult to locate the single-phase arc grounding fault of overhead distribution lines accurately.In this paper,the electromagnetic radiation characteristics of overhead distribution line arc fault are studied,and the feasibility of arc fault location method based on electromagnetic radiation signals is investigated.Through the test platform for real type fault simulation of 10 kV distribution network,the time domain and frequency domain characteristics as well as propagation attenuation law of electromagnetic radiation from grounding arc are analyzed.It is indicated that the electromagnetic radiation characteristic frequency range of arc current is 20~30 MHz,which is not affected by neutral grounding mode,arc grounding medium and distribution line parameters significantly.The radiation signals within the characteristic frequency range attenuate slowly in propagation.Accordingly,a miniaturized triangular monopole-loop combined planar antenna with a bandwidth of 20~500 MHz is designed.A miniature arc fault location experiment is carried out utilizing the designed antenna,which provides a basis for subsequent research on the practical application of arc fault location in distribution network.

关 键 词：架空配电线路 接地电弧 电磁辐射 时域特性 频域特性 故障定位 

分 类 号：TM75[电气工程—电力系统及自动化]