南方电网技术2017，Vol.11Issue(12)：56-61,6.DOI:10.13648/j.cnki.issn1674-0629.2017.12.009
基于分布式串联电感雷电回击电磁模型的电流分布及辐射电磁场研究
Study on Current Distribution and Radiated Electromagnetic Fields Based on Lightning Return Stroke Electromagnetic Model of Distributed Series Inductance
摘要
Abstract
Lighting return-stroke models are needed to specify the electromagnetic radiation source in studying the production of transi ent optical emission in the lower ionosphere,the energetic radiation from lighting,and characterization of Earth's electromagnetic environment,as well as studying lightning interaction with various objects and systems.Electromagnetic models of the lightning return stroke that based on Maxwell's equations allow a self-consistent full-wave solution.In this paper,the electromagnetic lightning return stroke model with distributed series inductance is disscussed.The finite difference time domain method (FDTD) is employed to calculate the spatial distribution of current along the lightning channel.The dipole technique is used to calculate the radiated electromagnetic field when the source is known.The results show that,by choosing the parameter of distributed series inductance in 2 ～ 10 μH/m,the propagation speed of lightning current are in c/3 ～ 2c/3.With the rising of distributed series inductance,the current-wave propagation speed decreases,the electric strength in the near field area increases and the attenuation become more significant over distance.The change of distributed series inductance has little effect on the magnetic field.关键词
雷电回击模型/分布式串联电感/时域有限差分法/偶极子法Key words
lighting return-stroke models/distributed series inductance/finite difference time domain method/dipole technique分类
信息技术与安全科学引用本文复制引用
项阳,厉天威,王琦,刘磊..基于分布式串联电感雷电回击电磁模型的电流分布及辐射电磁场研究[J].南方电网技术,2017,11(12):56-61,6.基金项目
中国南方电网有限责任公司科技项目(SEPRI-K175002).Supported by the Science and Technology Project of China Southern Power Grid Co.,Ltd.(SEPRI-K175002). （SEPRI-K175002）
