时间补偿法在电网雷击事故鉴定中的初步应用  

Preliminary Application of Time-of-arrival Revised Method for One Lightning Accident in Power Transmission Line

作　　者：宋琳 丁锋 陈佳雯 孟繁辉 顾佳颖 李杰[3] SONG Lin;DING Feng;CHEN Jia-wen;MENG Fan-hui;GU Jia-ying;LI Jie(Qingdao Meteorological Disaster Protection Technology Center, Qingdao 266003, China;Qingdao Meteorological Disaster Prevention Engineering Technology Research Center, Qingdao 266003, China;The Key Laboratory of Meteorological Disaster, Ministry of Education(KLME)/ Joint International Research Laboratory of Climate and Environment Change(ILCEC)/ Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disaster (CIC-FEMD)/ Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, China)

机构地区：[1]青岛市气象灾害防御技术中心,青岛266003 [2]青岛市气象灾害防御工程技术研究中心,青岛266003 [3]南京信息工程大学气象灾害教育部重点实验室/气候与环境变化国际合作联合实验室/气象灾害预报预警与评估协同创新中心/中国气象局气溶胶与云降水重点开放实验室,南京210044

出　　处：《科学技术与工程》2022年第6期2201-2208,共8页Science Technology and Engineering

基　　金：国家自然科学基金(41871020);中国气象局核心业务发展专项(CMAHX20160209)。

摘　　要：以昆明地区的多山地形为例,利用二维时域有限差分算法(two-dimensional finite-difference time-domain,2D FDTD),模拟研究了该地区多山地形对雷电多站时差定位精度的影响,讨论了时间补偿法在云南昆明供电局厂普Ⅰ回线路出现的一次雷击断路跳闸事故的初步应用。结果表明:从模拟结果看出,随着传播路径和地形高程的增加,相应的地闪回击电磁脉冲的到达时间明显延长,这种时间延长会造成地闪回击定位的偏差。从这次雷击跳闸事故中的应用效果看,当采用10%峰值法定位时,利用时间补偿法修订之前的定位偏差为113 m,修订之后的偏差为74 m;当采用逐峰法定位时,修订之前的偏差为212 m,修订之后122 m;当采用互相关算法时,修订之前的偏差为233 m,修订之后135 m。可以看出,当考虑时间补偿法后,定位结果都明显提高了。A two-dimensional finite-difference time-domain(2D FDTD)algorithm was used to simulate the propagation of lightning electromagnetic signals along mountainous terrains in Kunming,Yunnan Province,and the preliminary application of the time-of-arrival(TOA)revised method for one lightning outage accident in Yunnan Power transmission line were studied.The results show as follows.With the increase of the propagation path and the vertical profiles of topographic map from the return stroke points to the observation sites,the arrival time of the lightning electromagnetic field delays more,which will result in an error of the lightning location.From one lightning outage accident,it is found that the lightning location error decreases from 113 m to 74 m after the TOA revised method for the arrival time according to the 10%threshold method,and the location error decreases from 212 m to 122 m according to the peak field time and from 233 m to 135 m according to the waveform cross-correlation technique.Above all,the TOA revised method is very useful for the lightning location algorithm in the mountainous terrains.

关 键 词：时间补偿法 雷电电磁场 二维时域有限差分法 山体地形 时差定位 

分 类 号：P427.3[天文地球—大气科学及气象学]