Statistical Analysis of Lightning Electric Field Measured Under Equatorial Region Condition
Statistical Analysis of Lightning Electric Field Measured Under Equatorial Region Condition
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DOI：
10.1016/j.protcy.2013.12.224
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
B. Salimi;K. Mehranzamir;Z. Abdul-Malek
中科院分区：
文献类型：
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作者：
B. Salimi;K. Mehranzamir;Z. Abdul-Malek
闪电可以被描述为由于大气气候条件而产生的瞬间大电流放电，通常在几十公里内。闪电是由静电场(慢场变化)、辐射场(快场变化)和与电荷运动相关的磁场引起的。研究大气电学研究所需要的各种雷电参数，如电流、电荷转移等，都可以从雷电场分量的测量中提取出来。雷电特性及其统计信息是雷电防护系统设计和雷电辐射场计算的基础。本文分析了马来西亚南部负地闪产生的电场特征。研究了5次不同雷暴过程(每次雷暴持续约4-5小时)产生的220次地闪资料。统计结果显示，7%的闪光是单笔划闪光，最高记录的笔画数为每闪14次。在超过95%的闪光中可以识别出初步的击穿特征。观测到的闪电信号的初步击穿时间的最大和最小持续时间分别为38ms和490us。
Lightning can be described as transient high current electric discharges usually within few tens of kilometers resulting from the atmospheric climate condition. Lightning are due to the electrostatic field (slow field changes), radiated field (fast field changes) and magnetic fields associated with the motion of charges. The various lightning parameters such as electric current, charge transfer, as required for analysis of atmospheric electricity research can be extracted from the measurement of lightning field components. Lightning characteristics and their statistical information are the foundation for the design of lightning protection system as well as for the calculation of lightning radiated fields. In this paper, the characteristics of electric fields generated by negative cloud-to-ground lightning discharges in south of Malaysia are analyzed. A total of 220 cloud-to-ground lightning discharge from 5 different thunderstorm events (each event lasts for about 4-5 hours) were investigated. The findings of the statistical results showed that 7% of the flashes were single stroke flashes, and the maximum number of strokes recorded was 14 multiple strokes per flash. A preliminary breakdown signature in more than 95% of the flashes can be identified. The maximum and minimum of preliminary breakdown time duration of the observed lightning signals were 38 ms and 490 us, respectively.