基于群到达时间法的雷电定位系统及其定位误差分析  

Lightning Locating System Based on Time of Group Arrival Method and Location Error Analysis

作　　者：蔡新景 王延廷[2] 刘兴山[2] 苏有权[2] 王一平[2] 魏春龙[2] CAI Xinjing;WANG Yanting;LIU Xingshan;SU Youquan;WANG Yiping;WEI Chunlong(College of Electrical Engineering,Shenyang University of Technology,Shenyang 110870,China;Taipingwan Power Plant,Northeast Power Grid Corporation,Liaoning Dandong 118000,China)

机构地区：[1]沈阳工业大学电气工程学院,沈阳110870 [2]东北电网公司太平湾发电厂,辽宁丹东118000

出　　处：《高压电器》2020年第11期241-244,共4页High Voltage Apparatus

基　　金：辽宁省高等学校创新人才支持计划项目(LR2019-047);辽宁自然科学基金面上项目(2020-215);国家电网公司东北分部项目(2018-66)。

摘　　要：雷电定位系统是雷电物理和雷电防护领域的一个热点问题。当雷电放电产生的甚低频电磁辐射信号传输距离较远时,基于互相关函数的时差法往往不能准确进行雷电定位。基于此,文中深入研究了群到达时间法定位基本原理,并探讨了GPS时间误差、相位测量误差和频率测量误差对定位精度的影响。结果表明,采用群到达时间法进行雷电定位是可行的;GPS时间误差和相位测量误差导致定位误差较小,而频率测量误差对定位精度影响较大。Lightning location systems have received much attention in the fields of lightning physics and lightning protection.When the transmission distance of VLF electromagnetic radiation signal generated by lightning discharge is long,the time difference method based on cross-correlation function is often unable to accurately locate.In this pa-per the principle of time of group arrival method are investigated,and the effects of error of absolute time determined from GPS,phase measurement,and frequency measurement on lightning location accuracy are analyzed.It is shown that it is feasible to use time of group arrival method for lightning location.The effects of error of absolute time deter-mined from GPS and phase measurement on lightning location accuracy are small,however,the effect of error of fre-quency measurement on lightning location accuracy is comparatively larger.

关 键 词：雷电定位系统 群到达时间法 甚低频 群速度 相位 色散 

分 类 号：TM863[电气工程—高电压与绝缘技术]