海-陆混合路径对雷电电磁场传播的影响

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摘要利用Barrick等效表面阻抗法和Wait近似算法等研究了粗糙海-陆混合路径对雷电电磁场传播的影响。结果表明,当雷电发生在海面,电磁辐射场沿海-陆混合路径传播时,即使在陆地部分的传播长度仅为几十米,对2MHz以上甚高频的衰减也不容忽视,陆地部分对电磁场传播的影响远远大于海面。因此,利用海面对雷电电磁波谱进行测量,需要考虑海-陆混合路径传播的影响。如果关注的频率超过10MHz,还需要考虑海浪的影响。

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	李涵
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关键词 ：海-陆混合路径, 地闪回击, 电磁场, 频谱

Abstract：Based on the Barrick theory and Wait approximate theory, the propagation effects of the rough and ocean-land mixed path on the electromagnetic fields generated by lightning return stoke are analyzed. When the field propagates from the ocean surface to the land section, the lightning frequencies above about 2MHz undergo a rapid attenuation along the mixed path, and the effect of the rough land section on the fields is much more than that of the rough ocean surface. The propagation effect of a small land section with tens of meters width on the electromagnetic spectrum may not be ignored. Therefore, the lightning frequency spectrum experimentally obtained near the coast line should take into account the errors introduced by the rough and ocean-land mixed path. The attenuation of the frequency components higher than 10MHz may be caused significantly by the rough ocean surface.

Key words： Rough ocean-land mixed path lightning return stroke electromagnetic fields frequency spectrum

收稿日期: 2013-03-04 出版日期: 2014-06-16

PACS:

TM15

基金资助:南方电网公司科技资助项目（K-GX2012-024）

作者简介: 李涵男,1980年生,博士,博士后,研究方向为雷电监测和预警、电力系统防雷。邓雨荣男,1965年生,硕士,教授级高工,研究方向为高电压与绝缘技术、输变电设备状态监测和评估。

引用本文:

李涵, 邓雨荣, 朱时阳, 杨璟. 海-陆混合路径对雷电电磁场传播的影响[J]. 电工技术学报, 2014, 29(1): 229-235. Li Han, Deng Yurong, Zhu Shiyang, Yang Jin. Propagation Effects of the Rough and Ocean-Land Mixed Path on the Lightning-Radiated Electromagnetic Fields. Transactions of China Electrotechnical Society, 2014, 29(1): 229-235.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2014/V29/I1/229

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