三电极开关系统自击穿特性微观分析  

Micro-analysis on Characteristics of self-breakdown of Triple-electrode Switch

作　　者：詹艳艳[1,2] 刘晓明 吴楠[1] ZHAN Yanyan;LIU Xiaoming;WU Nan(Shenyang University of Technology,Shenyang 110870,China;Tianjin Polytechnic University,Tianjin 300387,China;Shenyang Ligong University,Shenyang 11159,China)

机构地区：[1]沈阳工业大学电气工程学院,沈阳110870 [2]沈阳理工大学自动化与电气工程学院,沈阳110159 [3]天津工业大学天津市电工电能新技术重点实验室,天津300387

出　　处：《沈阳理工大学学报》2018年第1期11-16,共6页Journal of Shenyang Ligong University

基　　金：国家自然科学基金资助项目(51377106)

摘　　要：针对三电极开关系统基于粒子扩散、碰撞、电离、激发等过程,建立等离子体流体—化学模型,采用有限元法,模拟真空条件下三电极开关自击穿微观过程,并与其在SF_6介质中微观过程进行对比分析。仿真分析了开关从放电初始到等离子体通道形成的物理过程。结果表明,与SF_6介质相比,开关在真空条件下等离子体通道电子密度数较多、电子温度较低;开关等离子体通道电子密度和电子温度随间距增加而增加。Aiming at the system of triple-electrode switch,the fluid-chemistry model of plasma is established based on the particles’diffusion,collision,ionization and excitation and the finite element method.The micro process of self-breakdown of triple-electrode switch system is simulated in vacuum and contrasted with the process in SF 6.The simulation results analyzes the physical process from initial discharge to plasma channel formed.The plasma channel has more electron number in vacuum than that in SF 6,and the electron temperature is lower.Electron density and electron temperature increases with the distance increasing,which describes physical mechanism of triple-electrode switch system.

关 键 词：三电极开关 自击穿微观过程 等离子体通道 流体化学模型 

分 类 号：TM854[电气工程—高电压与绝缘技术]