32 / 2021-05-24 23:00:24

强风沙环境汤生电离系数计算

由于西北地区恶劣的气候环境，常年爆发强风沙天气，使电网线路外绝缘和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。本文以板-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。



Due to the harsh climate environment in Northwest China, strong wind-sand weather broke out all year round, which exposed the external insulators of power grid lines and high-speed train roof to strong wind-sand environment, leading to insulation discharge and frequent accidents. The characteristics of gas discharge in wind-sand environment are quite different from those of static gas discharge. The air flow and sand have an important influence on the discharge ionization process in windy and sandy environment, Taking the uniform field formed by plate-plate electrode as the analysis object, considering the influence of airflow speed, sand distorting the electric field and sand charge capture on the discharge process in strong wind-sand environment, the analytical expression of Townsend ionization coefficient under wind-sand condition is derived 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.