摘要
为了模拟远区空间雷电电磁脉冲场,以便开展空间电子信息装备在空中受雷电电磁场影响研究,本文对远场区空间雷电电磁脉冲场的波形特征进行分析,从理论上探索了远场区空中不同高度处雷电电磁脉冲场与回击通道底部电流之间的相互关系。通过理论推导和近似处理,得到了基于传输线模型的远场区空间雷电电磁脉冲场和回击通道底部电流之间的关系。对比雷电电磁场的精确表达式与近似表达式描绘的波形,结果表明:远场区距离地面一定高度的空间雷电电磁场波形与回击通道底部电流波形存在局域特征近似性,且二者之间近似关系的适用高度随着水平距离的增大而近似线性增大。
In order to simulate the lightning electromagnetic pulse field in far-field to carry out the research on the influence of the electronic information equipment by the lightning electromagnetic field in the sky, the author conducts a further analysis on the characteristics of spatial LEMP waveform, and theoretically makes a research on the correlation between the LEMP and the lightning return stroke channel base current in different levels. Through theoretical derivation and approximation, the author concludes the relations between spatial LEMP and return stroke channel base current in the far field based on the TL model. Compareing the waveforms of the exact expressions and approximate expressions of the lightning electromagnetic field, it is concluded that the waveform of the spatial LEMP in the far-field, which has a certain distance with the earth, and the waveform of the return stroke channel base current are similar locally. And the suitable height of their approximate relations increased with the increasing of horizontal distance, tending to act as a linear increasing.
作者
王李鹏
王晓嘉
Wang Lipeng;Wang Xiaojia(Jiuquan Satellite Launch Center,Lanzhou 732750;Northwest Institute of Nuclear Technology,Xi＇an 710024)
出处
《电气技术》
2018年第10期10-15,22,共7页
Electrical Engineering
基金
国家自然科学基金资助项目(51377171)
