• 学术论文 •

### 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

1. 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
• 收稿日期:2021-01-18 修回日期:2021-05-04 出版日期:2022-05-25 发布日期:2022-06-18
• 作者简介:于建立 男,1983年4月出生于吉林省通化市.现为潍坊学院副教授、硕士生导师.获省级科技进步奖1项.在国内外发表学术论文10余篇.E‑mail: yu_jianli@foxmail.com

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

YU Jian-li1,2,3, CHENG Long2, FAN Ya-dong3, ZHANG Ying-dong2, LU Zhi-wei2

1. 1.College of Information and Control Engineering，Weifang University，Weifang，Shandong 261061，China
2.Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology，Ministry of Education （Northeast Electric Power University），Jilin，Jilin 132012，China
3.School of Electrical Engineering and Automation，Wuhan University，Wuhan，Hubei 430072，China
• Received:2021-01-18 Revised:2021-05-04 Online:2022-05-25 Published:2022-06-18

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.