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
杨庆 1齐玥 1韦思宇 2王科 3刘红文3
作者信息
- 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
- 折叠
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10kV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20～30MHz,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20～500MHz.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.
Abstract
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 10kV 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Key words
overhead distribution network/grounding arc/electromagnetic radiation/time domain characteristic/frequency domain characteristic/fault location引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据