电工技术学报  2022, Vol. 37 Issue (19): 5044-5055    DOI: 10.19595/j.cnki.1000-6753.tces.221256
电工理论与新技术 |
非均匀高温超导带材对CORC电缆失超特性的影响研究
李显皓1, 徐颖1, 任丽1, 唐跃进1, 彭思思2
1.强电磁工程与新技术国家重点实验室(华中科技大学电气与电子工程学院) 武汉 430074;
2.武汉船用电力推进装置研究所 武汉 430070
Influence of Non-Uniform High Temperature Superconducting Tapes on Quench Characteristics of CORC Cable
Li Xianhao1, Xu Ying1, Ren Li1, Tang Yuejin1, Peng Sisi2
1. State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan 430074 China;
2. Wuhan Institute of Marine Electric Propulsion Wuhan 430070 China
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摘要 高温超导CORC(conductor on round core)电缆失超时的热负荷严重威胁了低温系统和电缆本体的安全稳定运行。受微米级超导薄膜制备工艺等的影响,CORC电缆并绕的多根高温超导带材不均匀。为分析不均匀临界电流对CORC电缆失超特性的影响,该文搭建了基于三维T-A方程的有限元模型。以降维的带材曲面为求解区域,以等效的电流密度为求解变量,失超模型在同一几何中表达超导和常导两种属性,构建电流和电势两种约束。在导体域建立降维的热模型,用以考虑损耗和传热的影响;在全局建立等效的电路模型,用以控制并联导体的分流。进一步地,耦合模型考虑温度依赖的接头电阻以模拟CORC电缆带材的烧断和电流的突变。结果表明,非均匀高温超导带材影响了电流重分配的动态响应,加快了局部失超的发展过程。
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李显皓
徐颖
任丽
唐跃进
彭思思
关键词 高温超导CORC电缆局部失超不均匀性临界电流有限元法    
Abstract:The thermal load of the high temperature superconducting (HTS) CORC cable during quenching threatens the safe and stable operation of the cryogenic system and the cable body. Affected by the preparation process of micron-scale superconducting thin films, multiple HTS tapes wound in parallel with the CORC cable are not uniform. To analyze the influence of non-uniform critical current on quench characteristics of CORC cables, a finite element model based on the three-dimensional T-A formulation was built. Taking the reduced-dimensional tape surface as the solution area and the equivalent current density as the solution variable, the quench model expressed two properties of superconductivity and normal-conductivity, and constructed two constraints of current and potential in the same geometry. A reduced-dimensional thermal model was established in the conductor domain to consider the effects of loss and heat transfer; an equivalent circuit model was established globally to control the current redistribution. Further, the coupled model considered the temperature-dependent terminal resistance to simulate the burnout of tape and abrupt changes in current. The simulation results show that non-uniform HTS tapes affect the dynamic response of current redistribution and accelerate the development of local quench.
Key wordsHigh temperature superconducting CORC cable    local quench    non-uniformity    critical current    finite element method   
收稿日期: 2022-06-30     
PACS: TM26  
基金资助:GF科技重点实验室基金资助项目(6142217210207)
通讯作者: 任 丽 女,1968年生,教授,博士生导师,研究方向为超导电力。E-mail:renli@mail.hust.edu.cn   
作者简介: 李显皓 男,1997年生,博士研究生,研究方向为超导电缆多场分析。E-mail:lixh@hust.edu.cn
引用本文:   
李显皓, 徐颖, 任丽, 唐跃进, 彭思思. 非均匀高温超导带材对CORC电缆失超特性的影响研究[J]. 电工技术学报, 2022, 37(19): 5044-5055. Li Xianhao, Xu Ying, Ren Li, Tang Yuejin, Peng Sisi. Influence of Non-Uniform High Temperature Superconducting Tapes on Quench Characteristics of CORC Cable. Transactions of China Electrotechnical Society, 2022, 37(19): 5044-5055.
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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.221256          https://dgjsxb.ces-transaction.com/CN/Y2022/V37/I19/5044