超宽带射频技术对变压器多局部放电源的定位  

Multi-PD Sources Location by UWB RF Detection in Power Transformers

作　　者：唐志国[1] 常文治[1] 王彩雄[1] 陈金祥[2] 吴文宣[2] 李成榕[1] 

机构地区：[1]华北电力大学高电压与电磁兼容北京市重点实验室,北京102206 [2]福建省电力试验研究院,福州350007

出　　处：《高电压技术》2009年第7期1612-1617,共6页High Voltage Engineering

基　　金：国家自然科学基金(50477040);长江学者和创新团队发展计划(IRT0515)~~

摘　　要：电力变压器局部放电故障大多是在很短时间间隔内相继出现多个放电源,因此对于多放电源的有效定位是定位技术成功的关键,为解决多点局部放电源的定位问题,采用基于最短光程原理的超宽带射频定位技术,用4阵元传感器阵列检测局部放电源激发的电磁辐射波,获取3个相对时延作为计算参量,利用时间差算法实现对局部放电源空间几何位置进行搜索定位,在实验室环境下进行了空间多点模拟局部放电源的定位试验,多放电源的定位误差控制在10cm以内。此外,还介绍了最近在现场真实设备上进行局部放电定位的探索研究,为该技术向实用化方向的发展做出了有益的尝试。In most cases, there are multi-PD Sources in a very short time intervals when partial discharge fault happens in power transformers, as a result, accurate location of multi-PD sources is the key and premise to success of transformers PD location technology. In this paper, the ultra-wideband （ UWB） radio frequency （RF） location method was used, this method integrated PD RF detection and antenna array techniques based on Huygens-Fresnel principle of electromagnetic waves propagation, the PD electromagnetic radiation waves were received by 4 sensors array, getting the time difference of arrival （TDOA） as PD location calculation parameters, then, the PD location could be calculated by the Time-Difference location algorithm, demonstrating high sensitivity and accuracy for single PD source location by experiments in laboratory. Multi-PD sources location was also studied using the UWB RF location method. The results indicate that location error of every PD source is less than 10 centimeters. Moreover, a practical location case is given on a real transformer, it is a useful attempt to the practical direction of the UWB RF location method.

关 键 词：电力变压器 局部放电 超宽带 射频 定位 多局部放电源 

分 类 号：TM835[电气工程—高电压与绝缘技术]