HTS电力技术应用中低温氮气的绝缘特性研究  

Dielectric breakdown characteristics of cryogenic nitrogen gas above liquid nitrogen applied in HTS electric power equipment

作　　者：张京业[1] 戴少涛[1] 施飞[2] 赵连岐[2] 朱志芹[1] 滕玉平[1] 周微微[1] 王邦柱[1] 许熙[1] 

机构地区：[1]中国科学院电工研究所,北京100190 [2]江苏中天科技股份有限公司,南通226463

出　　处：《低温工程》2015年第4期13-16,38,共5页Cryogenics

基　　金：国家863(2012AA050403);江苏省产学研(BY2012245)联合资助

摘　　要：针对超导电力装置的低温高电压绝缘问题,通过低温高电压实验装置,系统地研究了液氮液面以上低温氮气的绝缘与击穿特性,重点研究了高压电极的形状、电极之间的间距和气体压力等因素对低温氮气击穿特性的影响规律。结果表明:在液氮液面以上固定的位置(确保低温氮气的温度一致),电极间距越大击穿电压越高;击穿电压随气体压力近似线性增加;电极形状对低温氮气的击穿电压影响显著,电极间隙的电场越均匀,击穿电压越高。In view of the superconducting power device of high voltage insulation problem, the insula- tion and breakdown characteristics of cryogenic nitrogen gas above liquid nitrogen were researched through the high voltage experimental device system, focusing on the influence law of the electrode shape, electrode spacing, gas pressure and other factors on breakdown characteristics of liquid nitrogen. The results show that the electrode gaps the greater the higher the breakdown voltage, breakdown voltage with the increase of gas pressure is lineal increase, effect on the breakdown voltage of cryogenic nitrogen gas above liquid nitro- gen is significantly.

关 键 词：巴申定律 氮气 高温超导 击穿特性 

分 类 号：TB663[一般工业技术—制冷工程]