Calculation of Shielding Failure Rate on Transmission Line Based on Improved EGM and the Analysis of Typical Accident

XU Fei; WANG Jian-guo; ZHOU Wen-jun; WEI Li-jing; DENG Guang-wu; MA Bin

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Calculation of Shielding Failure Rate on Transmission Line Based on Improved EGM and the Analysis of Typical Accident

更新时间：2025-04-26

- Calculation of Shielding Failure Rate on Transmission Line Based on Improved EGM and the Analysis of Typical Accident
- High VoltageApparatus Issue 3, Pages: 205-207(2006)
- 作者机构：
  
  1. 武汉大学电气工程学院
  2. 武汉大学电气工程学院湖北武汉430072
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM75
- Published：2006
- 稿件说明：
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[1]许飞,王建国,周文俊,卫李静,邓光武,马斌.改进电气几何模型对输电线路绕击率的计算及典型故障分析[J].高压电器,2006(03):205-207.

XU Fei, WANG Jian-guo, ZHOU Wen-jun, et al. Calculation of Shielding Failure Rate on Transmission Line Based on Improved EGM and the Analysis of Typical Accident[J]. High voltageapparatus, 2006, (3): 205-207.
[1]许飞,王建国,周文俊,卫李静,邓光武,马斌.改进电气几何模型对输电线路绕击率的计算及典型故障分析[J].高压电器,2006(03):205-207. DOI：

XU Fei, WANG Jian-guo, ZHOU Wen-jun, et al. Calculation of Shielding Failure Rate on Transmission Line Based on Improved EGM and the Analysis of Typical Accident[J]. High voltageapparatus, 2006, (3): 205-207. DOI：

摘要

提出了改进的电气几何模型

成功地解释了用原EGM法难以解释的现场事故原因。应用改进的电气几何模型分析了输电线路杆塔结构、避雷线和导线的布置、雷电流的幅值、地面倾角对绕击率的影响。结果表明

在地形复杂的山区

大电流也能对线路造成绕击。

Abstract

The improved electric geometrical model is proposed

and some on-site accidents are successfully explained

which are difficultly commented by EGM.With such model the effect of tower structure

lightning current amplitude

angle of the lightning incidence

as well as the ground angle on the shielding failure rate are analyzed.It is concluded that large lightning current can stride across lightning conductors to strike conductors under certain conditions in mountain areas.

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