大学物理 ›› 2018, Vol. 37 ›› Issue (4): 51-53.doi: 10.16854 /j.cnki.1000-0712.170377

• 物理.自然.技术.社会 • 上一篇    下一篇

雷电电磁场传输线方程的修正与分析

叶根   

  1. 普洱学院物理系,云南普洱665000
  • 收稿日期:2017-06-23 修回日期:2017-09-29 出版日期:2018-04-21 发布日期:2018-04-21
  • 作者简介:叶根( 1971-) ,女,云南普洱人,普洱学院物理系副教授,硕士,主要从事物理教学与雷电防护研究工
  • 基金资助:
    普洱学院课题项目( 201315) 资助

Correction and analysis of transmission line equations of the lightning electromagnetic field

YE Gen   

  1. Department of Physics,Pu’er College,Pu’er,Yunnan 665000,China
  • Received:2017-06-23 Revised:2017-09-29 Online:2018-04-21 Published:2018-04-21

摘要: 考虑大地的有限导电率时,大地附近的水平电场对电源线和电子设备的影响更为显著,因此,在假设大地为完全导 体的情况下推导出来的雷电电磁场传输线方程需进行修正. 利用修正过的传输线方程以及大地的各种参数,经过计算得到雷电过电压在传输线上的传播情况,并对大地有限导电率的影响作了讨论分析.

关键词: 雷电电磁场, 大地有限导电率, 传输线方程

Abstract: Considering the finite conductivity of the earth,the horizontal electric field of the near earth is more significant influence on the power cord and electronic equipment. Therefore,the earth conductor is supposed to be a noble ideal,in this case,the transmission line equation of the lightning electromagnetic field is derived,which needs to be revised. We use the modified transmission line equation and the various parameters of the earth and get the spread of lightning overvoltage on the transmission line. The impact on the limited earth conductivity is discussed and analyzed.

Key words: lightning electromagnetic field, finite conductivity of the earth, transmission line equation