气隙长度对大气压下环氧树脂阻挡放电的影响研究  

Research on effect of air gap length on epoxy resin barrier discharge in atmospheric pressure air

作　　者：张梦瑶 郑全福 罗林根[1] 盛戈皞[1] 江秀臣[1] ZHANG Mengyao;ZHENG Quanfu;LUO Lingen;SHENG Gehao;JIANG Xiuchen(Department of Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学电气工程系,上海200240

出　　处：《电机与控制学报》2024年第5期17-26,共10页Electric Machines and Control

摘　　要：为了研究气隙长度对大气压下介质阻挡放电的影响机制,从而进一步明晰介质阻挡放电的放电机理及特性,基于气体放电流体模型,针对长度3 mm以下的环氧树脂阻挡同轴电极气隙,在外施电场恒定的条件下对其放电微观过程进行仿真,从带电粒子微观运动角度研究气隙长度对气隙放电特性的影响。仿真结果表明:在长度小于3 mm的气隙中,环氧树脂的阻挡导致电子崩无法发展成为流注,其放电形式为汤森放电;气隙长度对放电过程的影响主要通过改变带电粒子的分布和电场强度来实现;气隙长度对放电发展速度几乎没有影响;当电子崩靠近较短气隙的阳极时,其崩头密度低于较长气隙;随着气隙长度的增加,放电电流峰值增大,上升速度和降落速度增加,脉冲宽度减小。通过对比理论计算与实验结果,证明了仿真方法的合理性。In order to investigate the influence of air gap length on dielectric barrier discharge at atmospheric pressure,and further analyze the discharge mechanism and characteristics of dielectric barrier discharge,under the condition of a constant external electric field,the fluid model was used to simulate the microscopic process of discharge in coaxial plate gap inhibited by epoxy resin less than 3 mm long.The influence of gap length on the characteristics of air gap discharge was investigated from the perspective of charged particle microscopic motion.Simulation results indicate that in gaps with lengths less than 3 mm,epoxy resin prevents the development of electron avalanches into streamers,resulting in Townsend discharge.The impact of gap length on the discharge process is primarily achieved by influencing the distribution of charged particles and the electric field.Gap length has almost no effect on the development speed of the discharge.When electron avalanches approach the anode in shorter gaps,the density of electron in the front of avalanche is lower than that in longer gaps.As the gap length increases,the discharge current peak value increases,and both the rise and fall rates of the current increase while the pulse width decreases.Compared theoretical calculation with experimental results,the rationality of this simulation method was verified.

关 键 词：介质阻挡放电 气隙长度 汤森放电 电子崩 流体模型 放电电流 

分 类 号：TM852[电气工程—高电压与绝缘技术]