无绝缘高温超导线圈横向电阻率提高的方法研究  

Method of enhancing transverse resistivity for no-insulation HTS coil

作　　者：鲁燕青 王银顺 朱承治 王秋良[3] 刘建华[3] Lu Yanqing;Wang Yinshun;Zhu Chengzhi;Wang Qiuliang;Liu Jianhua(State Key Laboratory for Alternate Electrical Power System with Renewable Source,North China Electric Power University,Beijing 102206,China;State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310007,China;Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]新能源电力系统国家重点实验室.华北电力大学,北京102206 [2]国网浙江省电力有限公司,杭州310007 [3]中国科学院电工研究所,北京100190

出　　处：《低温与超导》2019年第10期45-48,71,共5页Cryogenics and Superconductivity

基　　金：国家电网公司科技项目(52110418003H)资助

摘　　要：与传统高温超导绝缘线圈相比,无绝缘线圈在绕制过程中使用不锈钢带与超导带并绕,不锈钢带提高了线圈的机械强度并对线圈有保护作用,这样绕制的无绝缘线圈具有稳定性高、失超自我保护能力强、失超恢复快等优点。然而,由于其线圈匝间横向电阻率过低,在励磁过程中无绝缘线圈会出现不稳定、不均匀磁场。为此,提出一种无绝缘线圈中不锈钢带横向电阻率提高的方法,来增强线圈的稳定性和降低屏蔽电流。为提高横向电阻率,对不锈钢带进行热处理和化学处理。通过实验验证,结果表明:该处理工艺能有效提高无绝缘线圈的横向电阻率,对增强无绝缘高温超导线圈的稳定性具有重要实用价值。Compared with conventional high temperature superconducting(HTS) insulation coils, the no-insulation(NI)HTS coils are generally co-wound by stainless steel(SS)tape and HTS tape in order to improve the mechanical strength and protect the coils. So that the NI coils have the advantages of high stability, strong quench self-protection ability and fast recovery from quench. However, due to the low transverse resistivity among turns of the coil, the unstable and nonuniform magnetic field appears in the NI coil during the exciting process. This paper proposed a method for improving stability and decreasing screen current by enhancing transverse resistivity among turns of NI HTS coils. In order to enhance the transverse resistivity, the SS tape was thermally and chemically treated. The verified experimental results show that the process can effectively enhance the transverse resistivity of the NI coils such that has significant application for improving their temporal stability.

关 键 词：无绝缘线圈 高温超导带材 不锈钢带材 横向电阻率 

分 类 号：TM26[一般工业技术—材料科学与工程]