超导带材并联结构的失超传播特性研究  

Experimental study on the quench characteristic of YBCO tapes with different arranggements

作　　者：蒲东昇 任丽[1] 胡子珩 章彬 汪伟 徐颖[1] 陈贵伦 周考 Pu Dongsheng;Ren Li;Hu Ziheng;Zhang Bin;Wang Wei;Xu Yin;Chen Guilun;Zhou Kao(R&D Center of Applied Superconductivity,State Key Lab.of AEET,Huazhong University of Science and Technology,Wuhan 430074,China;Shenzhen Power Supply Bureau Co.,Ltd,Shenzhen 518001,China)

机构地区：[1]华中科技大学超导电力研究中心,华中科技大学强电磁工程与新技术国家重点实验室,武汉430074 [2]深圳供电局有限公司,深圳518001

出　　处：《低温与超导》2020年第6期36-42,共7页Cryogenics and Superconductivity

基　　金：国家自然科学基金(51707074);深圳供电局有限公司科技项目(090000KK52170171)资助。

摘　　要：失超传播速度vnzp和最小失超能量Emq是超导磁体的失超保护设计的重要参数。对由YBCO制成的单长导体、平行并联双导体和堆叠并联双导体进行实验,测试和分析了液氮温度下三种不同结构样品的失超传播速度和最小失超能量,监测了并联结构受到局部热干扰时的带材分流情况,及带材分流对于失超特性的影响。结果表明,分流现象导致失超传播速度降低,最小失超能量升高;通流比相同时,堆叠并联结构相比单根带材,失超传播速度约下降14%,最小失超能量约上升13%。Normal zone propagation velocity and minimum quench energy are the important parameters for quench protection of superconducting magnets.In this research,a series of experiments were conducted on single-length conductor,parallel double conductors and stack double conductors made of YBCO high temperature superconducting(HTS)tapes at the liquid nitrogen temperature,and their normal zone propagation velocities and minimum quench energies were tested and analyzed.Also,the current sharing of the parallel structure subjected to local thermal interference was monitored,and the influence of current sharing on the quenching characteristics was analyzed.The experimental results show that the current sharing leads to a decrease in the rate of VNZP and a increase in the rate of EMQ.When the flow ratio is the same,compared with single-length conductor,the quenching propagation speed of stack double conductors decreases by about 14%,and the minimum quenching energy increases by about 13%.

关 键 词：失超传播 YBCO带材 并联结构 

分 类 号：TB26[一般工业技术—工程设计测绘]