地表近区雷电回击电磁场的计算与特征分析  

Calculation and Character Analysis of Electromagnetic Field of Lightning Return Stroke in Near-field on the Surface of Ground

作　　者：王琳[1,2] 陈亚洲[1] 杜思尚 李冰 万浩江[1] 

机构地区：[1]军械工程学院静电与电磁防护研究所 [2]77108部队 [3]62301部队 [4]63963部队

出　　处：《高电压技术》2012年第11期2899-2905,共7页High Voltage Engineering

基　　金：国家自然科学基金(51077132)~~

摘　　要：为了揭示雷电回击电磁场导数与回击通道底部电流导数之间的内在联系,基于传输线(TL)模型从理论上对地表近区雷电回击电磁场导数和回击通道底部电流导数进行了研究。用偶极子法精确计算电磁场的结果表明,在距离雷电回击通道50m范围内,电场导数的波形与回击通道底部电流导数的波形基本符合;在距离雷电回击通道200m范围内,磁场导数的波形与回击通道底部电流导数的波形基本符合。由此可得出结论:近区回击电磁场导数的波形与雷电回击通道底部电流导数的波形近似。In order to reveal the inherent relationship between the electromagnetic field of return stroke and channel-base current, we searched the derivative of electromagnetic field of lightning return stroke in near-field on the surface of ground and derivative of channel-base current of lightning return stroke from theory with transmission line （TL） model in this papper. The results by accurately calculating with a dipole method show that the waveform of the derivative of the electric field and waveform of the derivative of approximate calculation are consistent within 50 meters far from lightning return stroke channel; and the waveform of the derivative of the magnetic field and the waveform of the derivative of approximate calculation are consistent within 200 meters. The result concludes that the waveform of the derivative of electromagnetic field near lightning return stroke channel on the surface of ground is similar with waveform of the derivative of channel-base current of lightning return stroke.

关 键 词：雷电回击电磁场 近区 回击模型 偶极子法 导数 通道底部电流 

分 类 号：TM153.1[电气工程—电工理论与新技术]