A New Method for the Calculation of the Linear Charge Density and Current in Upward Positive Leader

被引：0
|
作者：
Zheng, Dong [1 ,2 ]
Chen, Mingli [2 ]
Zhang, Yijun [1 ]
Lu, Weitao [1 ]
机构：
[1] Chinese Acad Meteorol Sci, Lab Lightning Phys & Protect Engn, Zhong Guan Cun South St 46, Beijing, Peoples R China
[2] Hong Kong Polytech Univ, Dept Bldg Serv Engn, Kowloon, Hong Kong, Peoples R China
来源：
2010 ASIA-PACIFIC INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY & TECHNICAL EXHIBITION ON EMC RF/MICROWAVE MEASUREMENTS & INSTRUMENTATION | 2010年
关键词：
D O I：
10.1109/APEMC.2010.5475547
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A new method for the calculation of the linear charge density (LCD) and current in upward positive leader (UPL) is put forward in this study. It is tested in three classical artificially triggered lightning discharges. The current calculated based on the charge density and the velocity of the leader are compared with the measured current, relative brightness of the leader channel in the frame of high-speed camera and some current waveforms reported by other authors. The results indicate that before the disintegration of the wire, LCDs in UPLs are of magnitude from several to hundreds of micro-coulombs per meter and the distribution of LCD was strongly skewed toward the UPL tips. Additionally, the calculated current in the UPLs are of magnitude from less than one to tens of amperes and increase with the leader propagating. The method is believed to be reliable through the analysis and compare.
引用
收藏
页码：1526 / 1529
页数：4
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