地闪回击电场波形参数分析及类型自动识别程序设计
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摘要
针对正负地闪准确区分识别技术手段较难的缺陷,对闪电电场的波形进行了分析,对地闪回击波形的参数特征进行了分析和统计,并研究闪电放电类型的自动识别。利用时间分辨率为50 ns的快天线电场变化和126 MHz甚高频(VHF)辐射资料,对雷暴过程中闪电的波形进行时域特征分析。通过对闪电电场波形数据的分析,给出了识别地闪回击的依据,设定回击的上升时间在1~20μs之间,下降时间在2.5~500μs之间,编写程序实现回击的自动识别,并进行了实际测试。结果表明,自动识别程序对负地闪回击的识别效率可达95%,实现了较为有效的自动识别,对于雷电探测和雷电防护工作来说有很大的实用价值。
Aiming at the defect that the positive and negative CG accurately distinguish recognition technology is difficult,the waveform of lightning electric field are analyzed,analysis and statistics on theparameters of return-stroke waveform are carried out,And study the automatic identification of lightningdischarge types. By using the fast electric field variation of time resolution 50 ns and the 126 MHz veryhigh frequency(VHF)radiation data,the characteristics of lightning waveform during thunderstorm areanalyzed in time domain. Through the analysis of lightning electric field waveform data,gives back thelightning recognition basis,setting back the rise time between 1~20 s,fall time between 2.5~500 s,write the automatic recognition program counter,and the actual test. The results show that the recognitionefficiency of automatic recognition program to negative ground return stroke is 95%,and the automatic iden-tification is more effective. It has great practical value for lightning detection and lightning protection work.
Aiming at the defect that the positive and negative CG accurately distinguish recognition technology is difficult,the waveform of lightning electric field are analyzed,analysis and statistics on theparameters of return-stroke waveform are carried out,And study the automatic identification of lightningdischarge types. By using the fast electric field variation of time resolution 50 ns and the 126 MHz veryhigh frequency(VHF)radiation data,the characteristics of lightning waveform during thunderstorm areanalyzed in time domain. Through the analysis of lightning electric field waveform data,gives back thelightning recognition basis,setting back the rise time between 1~20 s,fall time between 2.5~500 s,write the automatic recognition program counter,and the actual test. The results show that the recognitionefficiency of automatic recognition program to negative ground return stroke is 95%,and the automatic iden-tification is more effective. It has great practical value for lightning detection and lightning protection work.
引文
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[11]张少卿.地闪回击脉冲电磁场空间分布规律研究[D].哈尔滨:哈尔滨工业大学,2013.ZHANG Shaoqing.Study on the spatial distribution of pulsed electromagnetic field of ground flashback[D].Harbin:Harbin Institute of Technology,2013
[12]蒋宝忠,滕欢.雷电回击模型在雷电电磁场计算中的应用分析[J].四川电力技术,2010,33(2):38-41.JIANG Baozhong,TENG Huan.The application and analysis of lightning strike model in the calculation of lightning electromagnetic field[J].Sichuan electric power technology,2010,33(2):38-41.
[13]ERIKSSON A J.An Improved Electrogeometric Model for Transmission Line Shielding Analysis[J].IEEE Transactions on Power Delivery,1987,2(3):871-885.
[14]BABA Y,RAKOV V A.Lightning strikes to tall objects:Currents inferred from far electromagnetic fields versus directly measured currents[J].Geophysical Research Letters,2007,341(19):255-268.
[15]DALESSANDRO F,PETROV N.Field study on the interception efficiency of lightning protection systems and comparison with models[J].Proceedings of the Royal Society A Mathematical Physical&Engineering Sciences,2009,113(462):1365-1386.
[2]UMAN M A.The art and science of lightning protection[M].Cambridge University Press.2008:3-20
[3]弗拉迪米尔A.洛可夫,马丁A.乌曼.雷电[M].张云峰,吴建兰,译.北京:机械工业出版社,2016:85-87
[4]崔逊.全球闪电定位系统_WWLLN_探测效率和探测精度评估[D].南京:南京信息工程大学,2013
[5]KRIDER E P,NOGGLE R C,UMAN M A,A gated,wideband magnetic direction finder for lightning return strokes[J].Appl.Metoer,1976,15:301-306.
[6]CASPER P W,BENT R B,Results from the LPATS USA national lightning detecting and tracking system from the1991 lightning season[R].in Proc,21st Int.Conf.on lightning protection,Berlin,339-342.
[7]FINKE U,KREYER O,Detect and locate lightning events from Geostationary Satellite observations[R].Report part I:Review of existing lightning location systems,September2002:3-17.
[8]郄秀书,刘欣生,张广庶,等.甘肃中川地区雷暴的地闪特征[J].气象学报,1998,56(3):312-322.QIE Xiushu,LIU Xinsheng,ZHANG Guangshu,et al.Gan-su Zhongchuan area of thunderstorm characteristics of flash[J].Journal of meteorology,1998,56(3):312-322.
[9]董万胜,刘欣生.利用闪电宽带干涉仪系统对地闪先导—回击过程的观测研究[J].中国科学:,2002,32(1):81-88.DONG Wansheng,LIU Xinsheng.Using the lightning wideband interferometer system for the observation of the pilot and return process of the ground flicker[J].Chinese Science:2002,32(1):81-88.
[10]祝宝友,陶善昌,谭涌波.伴随超强VHF辐射的闪电双极性窄脉冲初步观测[J].气象学报,2007,65(1):124-130.ZHU Baoyou,TAO Shanchang,TAN Yongbo.With lightning bipolar super VHF radiation pulse preliminary observation[J].Journal of meteorology,2007,65(1):124-130.
[11]张少卿.地闪回击脉冲电磁场空间分布规律研究[D].哈尔滨:哈尔滨工业大学,2013.ZHANG Shaoqing.Study on the spatial distribution of pulsed electromagnetic field of ground flashback[D].Harbin:Harbin Institute of Technology,2013
[12]蒋宝忠,滕欢.雷电回击模型在雷电电磁场计算中的应用分析[J].四川电力技术,2010,33(2):38-41.JIANG Baozhong,TENG Huan.The application and analysis of lightning strike model in the calculation of lightning electromagnetic field[J].Sichuan electric power technology,2010,33(2):38-41.
[13]ERIKSSON A J.An Improved Electrogeometric Model for Transmission Line Shielding Analysis[J].IEEE Transactions on Power Delivery,1987,2(3):871-885.
[14]BABA Y,RAKOV V A.Lightning strikes to tall objects:Currents inferred from far electromagnetic fields versus directly measured currents[J].Geophysical Research Letters,2007,341(19):255-268.
[15]DALESSANDRO F,PETROV N.Field study on the interception efficiency of lightning protection systems and comparison with models[J].Proceedings of the Royal Society A Mathematical Physical&Engineering Sciences,2009,113(462):1365-1386.