强风沙环境汤生电离系数计算  

Calculation of Townsend Ionization Coefficient in Strong Wind⁃sand Environment

作　　者：史志鹏 张庆平 康永强 李帅兵 李宏伟 曹炳磊 SHI Zhipeng;ZHANG Qingping;KANG Yongqiang;LI Shuaibing;LI Hongwei;CAO Binglei(School of New Energy and Power Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Power Research Institute of State Grid Ningxia Electric Power Company,Yinchuan 750000,China)

机构地区：[1]兰州交通大学新能源与动力工程学院,兰州730070 [2]国网宁夏电力有限公司电力科学研究院,银川750000

出　　处：《高压电器》2022年第3期37-42,共6页High Voltage Apparatus

基　　金：国家自然科学基金项目(52067014,52167018);宁夏自然科学基金项目(2021AAC03493);甘肃省教育厅青年博士基金项目(2021QB⁃060);甘肃省自然科学基金(20JR10RA226);兰州交通大学青年科学研究基金项目(2020013,2019029)。

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。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 environ⁃ment 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 elec⁃trode 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.

关 键 词：强风沙环境 汤生理论 汤生电离系数 气体放电 

分 类 号：U270[机械工程—车辆工程]