Calculation of Townsend Ionization Coefficient in Strong Wind-sand Environment

SHI Zhipeng; ZHANG Qingping; KANG Yongqiang; LI Shuaibing; LI Hongwei; CAO Binglei

doi:10.13296/j.1001-1609.hva.2022.03.005

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Calculation of Townsend Ionization Coefficient in Strong Wind-sand Environment

更新时间：2025-04-26

- Calculation of Townsend Ionization Coefficient in Strong Wind-sand Environment
- High VoltageApparatus Vol. 58, Issue 3, Pages: 37-42(2022)
- 作者机构：
  
  1. 兰州交通大学新能源与动力工程学院
  2. 国网宁夏电力有限公司电力科学研究院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2022.03.005
  CLC： U270
- Published：2022
- 稿件说明：
移动端阅览
SHI Zhipeng, ZHANG Qingping, KANG Yongqiang, et al. Calculation of Townsend Ionization Coefficient in Strong Wind-sand Environment[J]. High voltageapparatus, 2022, 58(3): 37-42.
DOI：

SHI Zhipeng, ZHANG Qingping, KANG Yongqiang, et al. Calculation of Townsend Ionization Coefficient in Strong Wind-sand Environment[J]. High voltageapparatus, 2022, 58(3): 37-42. DOI： 10.13296/j.1001-1609.hva.2022.03.005.

摘要

由于西北地区恶劣的气候环境，常年爆发强风沙天气，使高速列车车顶外绝缘常年暴露在强风沙环境中，引发绝缘放电导致事故频发。处于风沙环境下的气体放电特性与静态气体放电特性有较大差异，风沙环境下气流与沙尘对放电电离过程产生重要影响。文中以板—板电极所形成的均匀场为分析对象，考虑强风沙环境下气流速度、沙粒畸变电场和沙粒荷电捕获对放电过程所造成的影响，应用强化偶极子模型，推导了风沙条件下汤生电离系数的解析表达式。研究结果对于定量分析强风沙环境下气体放电特性具有理论参考价值。

Abstract

The external insulation on the roof of high-speed train is exposed to strong wind-sand environment due to the harsh climate environment and strong wind sand weather all year round in the Northwest region of China

which leads to frequent accident because of insulation discharge. The characteristics of gas discharge in wind-sand environment are quite different from those of static gas discharge

and the airflow and sand have an serious influence on the discharge ionization process in wind-sand environment. In this paper

the uniform field formed by plate-plate electrode is taken as the analysis object

the analytical expression of Townsend ionization coefficient under wind-sand condition is derived by considering the influence of airflow speed

sand distorting the electric field and sand capture of the electrons on the discharge process in strong wind-sand environment and also by using the dipole-enhanced model. The research results have theoretical reference value for quantitative analysis of gas discharge characteristics in strong wind-sand environment.

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