窄间隙SF_6放电过程粒子动力学行为  

Particle dynamics property of the narrow-gap SF_6 during its discharge process

作　　者：赵文君[1] 兰浩[1] 肖达正[1] 

机构地区：[1]四川省电力公司宜宾电业局,四川宜宾644000

出　　处：《黑龙江电力》2013年第1期72-75,81,共5页Heilongjiang Electric Power

摘　　要：为了能够从微观上深入研究SF6气体的放电机理,采用粒子连续性方程耦合泊松方程构建SF6气体放电流体模型,其中粒子连续性方程由电子、正离子和负离子连续性方程构成,用有限元法对该模型进行耦合求解。模拟过程考虑了带电粒子及中性气体分子间的电离、吸附、复合以及扩散等过程。仿真结果表明,SF6气体放电过程包含三个阶段:电子崩阶段、电子崩转化为流注阶段、流注放电阶段。In order to study the discharge mechanism of SF6 from micro point of view, this paper establishes the flu- id model of SF6 discharge by particle continuity equation coupling poisson equation, which is solved by finite ele- ment method. Among the equations, the particle equation is established by electron, positive and negative ion con- tinuity equation. The ionization, adsorption, compound and spread amongc harged ion and neutral gas molecules are taken into consideration. The simulation result shows that there are three stages of SF6 discharge： electron ava- lanche; electron avalanche transformed into streamer; streamer discharge.

关 键 词：六氟化硫 电子崩 流注放电 有限元法 

分 类 号：TM853[电气工程—高电压与绝缘技术]