HTS电力技术应用中的氮气绝缘特性研究  

Electrical insulation characteristics of nitrogen gas 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：《低温与超导》2015年第4期1-5,共5页Cryogenics and Superconductivity

基　　金：国家"863"资助项目(2012AA050403);江苏省产学研资助项目(BY2012245)

摘　　要：近年来,随着高温超导电力技术的快速发展,超导电力装置的电压等级也不断提高,目前已由配电级发展到110k V以上输电级。液氮作为超导绕组等超导电力装置核心部件的制冷剂,同时起到超导装置的高电压绝缘介质的作用。文中针对短路故障、短时脉冲过电流、瞬时过电压等极端情况下,由于液氮瞬间汽化,引发的超导电力装置绝缘水平退化问题,通过实验系统研究了氮气的绝缘与击穿特性,并重点研究了电极形状、电极间距和气体压力等因素对气体的击穿特性的影响规律,为高温超导电力装置,特别是电阻型超导限流器的设计与运行,提供理论与实验依据。Recent years, with the rapid development of high temperature superconducting （HTS） power technology, the volt- age levels of superconducting power devices are also improved from distribution level to transmission level over 110kV. Liquid ni- trogen used as the refrigerant of the superconducting power devices, also play as high voltage insulation dielectric. During the short circuit fault and short pulse current, transient over voltage and other extreme conditions, liquid nitrogen will flash vaporate. This would lead to the degradation of insulation. In this paper, the insulation and breakdown characteristics of nitrogen gas, the influence law and focuses on the breakdown characteristics of the electrode shape and electrode spacing, gas pressure and temper- ature were studied by experiences. It would provide theoretical and experimental basis for the design and operation of HTS power device, especially for resistive type superconducting fault current limiter.

关 键 词：巴申定律 氮气 高温超导 击穿特性 

分 类 号：TM26[一般工业技术—材料科学与工程]