Influence of Geoelectric Parameters and Ground Equivalent Thickness on Vertical Electric Fields Nearby the Return-Stroke Channel

YU Jian-li; CHENG Long; FAN Ya-dong; ZHANG Ying-dong; LU Zhi-wei

doi:10.12263/DZXB.20210120

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Influence of Geoelectric Parameters and Ground Equivalent Thickness on Vertical Electric Fields Nearby the Return-Stroke Channel

PAPERS | 更新时间：2025-12-08

- Influence of Geoelectric Parameters and Ground Equivalent Thickness on Vertical Electric Fields Nearby the Return-Stroke Channel
- ACTA ELECTRONICA SINICA Vol. 50, Issue 5, Pages: 1159-1166(2022)
- 作者机构：
  
  1.潍坊学院信息与控制工程学院, 山东潍坊 261061
  2.现代电力系统仿真控制与绿色电能新技术教育部重点实验室(东北电力大学),吉林吉林 132012
  3.武汉大学电气与自动化学院, 湖北武汉 430072
- 作者简介：
- 基金信息：
- DOI：10.12263/DZXB.20210120
  CLC： TM863
- Received：18 January 2021，
  
  Revised：2021-05-04，
  
  Published：25 May 2022
- 稿件说明：
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于建立,程龙,樊亚东等.大地电参数和地面等值厚度对地闪通道附近垂直电场的影响[J].电子学报,2022,50(05):1159-1166.

YU Jian-li,CHENG Long,FAN Ya-dong,et al.Influence of Geoelectric Parameters and Ground Equivalent Thickness on Vertical Electric Fields Nearby the Return-Stroke Channel[J].ACTA ELECTRONICA SINICA,2022,50(05):1159-1166.
于建立,程龙,樊亚东等.大地电参数和地面等值厚度对地闪通道附近垂直电场的影响[J].电子学报,2022,50(05):1159-1166. DOI： 10.12263/DZXB.20210120.

YU Jian-li,CHENG Long,FAN Ya-dong,et al.Influence of Geoelectric Parameters and Ground Equivalent Thickness on Vertical Electric Fields Nearby the Return-Stroke Channel[J].ACTA ELECTRONICA SINICA,2022,50(05):1159-1166. DOI： 10.12263/DZXB.20210120.

摘要

为了深入理解地闪回击电磁脉冲特性，采用时域有限差分方法计算了地闪回击200m以内地面、20m高和50m高的垂直电场.分析了大地电导率、大地相对介电常数以及地面等值厚度三个特征量对该范围内垂直电场的影响.结果表明，该范围内地面和空间垂直电场均在2~3μs的快速上升后出现时间较长的“平台”波形，“平台”高度和波头上升陡度均随回击距离和高度增加而非线性降低.50m远地面场和空间场“平台”高度随大地电导率增大分别提高和降低，10μs内最大变化5%~10%，并且此处“平台”高度随地面等值厚度增大而略有增加.大地相对介电常数对该范围内垂直电场的影响可忽略.

Abstract

In order to understand the characteristics of lightning electromagnetic pulse(LEMP) generated by cloud-to-ground lightning

the vertical electric fields within 200m with the different heights of ground

20m high and 50m high were calculated by using the finite difference time domain(FDTD) method. The influences of three characteristic parameters of earth conductivity

earth relative permittivity and ground equivalent thickness on vertical electric field were analyzed. Results show that

in this range

the vertical electric field on ground and in space appears a long "platform" waveform after a rapid rise of 2~3μs. The platform height and the rise steepness of wave front decrease nonlinearly with the increase of return-stroke distance and height. The "platform" height of vertical electric fields with the return-stroke distance of 50m on ground and in space increases and decreases respectively with the increase of the earth conductivity

and the maximum change is about 5%~10% within 10μs. In addition

the "platform" height with the same return-stroke distance increases slightly with the increase of ground equivalent thickness. The influence of the earth relative permittivity on the vertical electric field in this range can be ignored.

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references

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