人工触发闪电箭式先导和企图先导光电同步观测与模拟  

Photoelectric Synchronous Observation and Simulation of Dart Leader and Attempted Leader of Artificially Triggered Lightning

作　　者：蔡力 储汪祥[1,2] 韦道明 闫继平 高耀庭 Cai Li;Chu Wangxiang;Wei Daoming;Yan Jiping;Gao Yaoting(Engineering Research Center of Lightning Protection&Grounding Technology Ministry of Education Wuhan 430072,China;School of Electrical Engineering and Automation Wuhan University Wuhan 430072,China;Unit 32021 of Chinese People's Liberation Army Beijing 100080,China;Unit 32020 of Chinese People's Liberation Army Wuhan 430061,China;Unit 31016 of Chinese People's Liberation Army Beijing 100080,China)

机构地区：[1]雷电防护与接地技术教育部工程研究中心,武汉430072 [2]武汉大学电气与自动化学院,武汉430072 [3]中国人民解放军32021部队,北京100080 [4]中国人民解放军32020部队,武汉430061 [5]中国人民解放军31016部队,北京100080

出　　处：《电工技术学报》2023年第S01期177-186,共10页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(52177154)。

摘　　要：基于同步光学和电场数据分析了人工触发闪电的箭式先导和企图先导的发展过程,测得了两种先导的二维传播速度,箭式先导的二维传播速度的取值范围为1.5×10^(6)~10.9×10^(6)m/s,企图先导二维传播速度在0.4×10^(6)~2.9×10^(6)m/s之间。企图先导终止前在光学和电场上同箭式先导都存在一定的相似性。企图先导二维传播速度小于箭式先导的速度,放电过程也不如箭式先导强烈。利用分段速度源电荷模型对箭式先导和企图先导的电场波形进行模拟,估算了先导发展时的电荷密度,最终所得的模拟曲线与实测曲线能较好地吻合。The time and place of lightning are determined by using the artificial lightning technology,which makes lightning current and electric field data easily measured.In the past,the research of lightning mainly focused on the statistical analysis of artificial lightning electromagnetic field and current data,and only the stepped leader with slow development speed can be observed optically.With the application and upgrading of high-speed cameras and other equipment,the optical development process of the fast-developing dart leader has been gradually reported,and some leaders(attempted leader(AL))that did not develop to the ground have also been found.Rocket-triggered lightning experiments were conducted at the Guangzhou Field Experiment Site for Lightning Research and Testing in Conghua,Guangzhou,during the summer of 2018 and 2019.The optical measurement system of the experimental base has been upgraded,and the number of pictures taken by the high-speed camera per second is 20000,which makes the optical development process of the dart leader and the attempted leader recorded.This paper selects one of the typical lightning events for analysis.This event has a total of 8 dart leader and 15 attempted leader processes.The development process of the dart leader and the attempted leader was analyzed from the perspective of optics and electric field,and the 2-D propagation speed of the two kinds of leaders were measured:the value range of the speed of the dart leader is 1.5~10.9×10^(6)m/s,the 2-D propagation speed of the attempted leader is 0.4~2.9×10^(6)m/s.At the same time,the termination heights of these 15 attempted leaders were also measured,and they all terminated above 500 m.The terminal heights of AL2,AL5,AL6,AL11 and AL15 all exceed 1 km,which indicates that they have more chance to develop into arrow leader.The termination height of AL15 is 505 m,which is the most likely to develop into dart leader.The electric field waveforms of the dart leader and the attempted leader show the development characteristics of the

关 键 词：人工触发闪电 箭式先导 企图先导 源电荷模型 

分 类 号：TM863[电气工程—高电压与绝缘技术]