电工技术学报  2021, Vol. 36 Issue (18): 3884-3890    DOI: 10.19595/j.cnki.1000-6753.tces.200817
电工理论 |
热扰动冲击下的高温超导电缆失超恢复特性
祝乘风, 厉彦忠, 谭宏博, 史佳敏, 聂杨
西安交通大学能源与动力工程学院 西安 710049
Numerical Analysis on the Quench and Recovery of the High Temperature Superconducting Cable Subjected to Thermal Disturbance
Zhu Chengfeng, Li Yanzhong, Tan Hongbo, Shi Jiamin, Nie Yang
School of Energy and Power Engineering Xi'an Jiaotong University Xi'an 710049 China
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摘要 高温超导(HTS)电缆在运行过程中,不可避免会遇到热扰动冲击,当热扰动能量足够大时会引起高温超导电缆的局部失超,并沿着电缆轴向传播。该文通过建立等效电路模型和一维传热模型,实现电场和温度场的耦合求解,得到高温超导电缆在热扰动冲击下的失超恢复特性,并考虑热流脉冲和液氮流速对电缆失超恢复过程的影响。结果表明:当热扰动能量低于临界恢复能量时,高温超导电缆在液氮冷却下逐渐恢复至超导态;否则,电缆的失超段将沿着轴向传播,导致电缆整体失超。随着努塞尔数的增大,临界恢复能量呈指数增大。电缆恢复时间与液氮流速呈幂律关系。该文计算结果对高温超导电缆的正常运行具有指导意义。
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祝乘风
厉彦忠
谭宏博
史佳敏
聂杨
关键词 高温超导电缆电磁热耦合失超传播热扰动流动换热    
Abstract:During the operation of HTS cable, it is inevitable to encounter thermal disturbance. If the thermal disturbance is large enough, local quench will occur and spread along the cable. By establishing the equivalent circuit model and one-dimensional heat transfer model, the coupling solution of electric field and temperature field was realized in this paper. The quench and recovery characteristics in the superconducting cable were obtained, and the influence of liquid nitrogen flow rate and heat pulse energy on the quench propagation was considered. The results show that when the thermal disturbance energy is lower than the critical recovery energy, the cable returns to superconducting stage by the cooling of liquid nitrogen. Otherwise, the local quench will propagate, leading to the whole quench of HTS. With the increase of Nusselt number, the critical pulse energy of recovery increases exponentially. The recovery time has a power law relationship with the liquid nitrogen flow rate. The analysis results provide the theoretical basis for the stable operation of HTS cables.
Key wordsHigh temperature superconducting cable    coupled electric-thermal    quench propagation    thermal disturbance    flow and heat transfer   
收稿日期: 2020-07-09     
PACS: TK124  
  TM725  
基金资助:国家重点研发计划资助项目(2018YFB0904400)
通讯作者: 厉彦忠 男,1958年生,教授,博士生导师,研究方向为高温超导输电。E-mail: yzli-epe@mail.xjtu.edu.cn   
作者简介: 祝乘风 男,1996年生,博士研究生,研究方向为电磁热耦合。E-mail: zhuchengfeng@stu.xjtu.edu.cn
引用本文:   
祝乘风, 厉彦忠, 谭宏博, 史佳敏, 聂杨. 热扰动冲击下的高温超导电缆失超恢复特性[J]. 电工技术学报, 2021, 36(18): 3884-3890. Zhu Chengfeng, Li Yanzhong, Tan Hongbo, Shi Jiamin, Nie Yang. Numerical Analysis on the Quench and Recovery of the High Temperature Superconducting Cable Subjected to Thermal Disturbance. Transactions of China Electrotechnical Society, 2021, 36(18): 3884-3890.
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