百kV/cm场强下SF_(6)气体开关纳秒脉冲击穿场强和时延经验公式  

Empirical formula of breakdown electric field and time delay for SF_(6) gas switch under nanosecond pulse and hundreds of kV/cm electric field

作　　者：郭帆[1] 贾伟[1] 谢霖燊[1] 陈志强[1] 吴伟[1] 谢彦召[2] Guo Fan;Jia Wei;Xie Linshen;Chen Zhiqiang;Wu Wei;Xie Yanzhao(State Key Laboratory of Intense Pulsed Radiation Stimulation and Effect,Northwest Institute of Nuclear Technology,Xi’an 710024,China;State Key Laboratory of Electrical Insulation and Power Equipment,Xi'an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西北核技术研究所强脉冲辐射环境模拟与效应国家重点实验室,西安710024 [2]西安交通大学电气绝缘与电力设备国家重点实验室,西安710049

出　　处：《强激光与粒子束》2022年第7期47-52,共6页High Power Laser and Particle Beams

摘　　要：百kV/cm高场强纳秒脉冲条件下,采用J.C.Martin经验公式估算SF_(6)气体击穿场强时,估算值与实验结果差异显著。为了进一步指导高场强脉冲气体开关设计,为开关工作状态调节提供依据,借鉴经典击穿场强经验公式形式建立了百kV/cm场强下SF_(6)气体开关纳秒脉冲击穿场强和时延与实验参数之间的关系,基于实验数据拟合形成了修正系数的击穿场强和时延经验公式。研究表明,百kV/cm场强和纳秒脉冲条件下脉冲电压斜率对开关击穿特性有重要影响,击穿场强与击穿时延相互关联。百ns至μs脉冲与几十ns脉冲气体放电机理的区别引起放电过程中击穿时延组成发生变化,导致了经典击穿场强经验公式估算值与实验结果的显著差异。修正系数的击穿经验公式可为电磁脉冲模拟器输出开关提供更为精确的工程设计依据。There are significant differences between the calculation results and experimental results by using J.C.Martin empirical formula to estimate the breakdown electric field for hundreds of kV/cm electric field and nanosecond pulse.To improve the design of pulsed gas switch and adjustment of working conditions,the relationships between the breakdown electric field and time delay and the experimental parameters based on the classical empirical formula is established.The empirical formula of breakdown electric field and time delay for SF_(6)gas switch under nanosecond pulse and hundreds of kV/cm electric field is presented.It is indicated that the slope of pulse will affect the breakdown characteristics of nanosecond pulse in high electric field and the breakdown electric field is correlated with the breakdown time delay.The differences between the calculation results and experimental results are caused by the experimental conditions.The fitting expression of empirical formula can give more guidance for the design of output switch in the electromagnetic pulse simulator.

关 键 词：高电场强度 纳秒脉冲 击穿场强 击穿时延 经验公式 

分 类 号：TM89[电气工程—高电压与绝缘技术]