Numerical Modeling and Experimental Analysis of AC Critical Current in YBCO-Coated Conductors

被引：4
|
作者：
Liu, Hongwei [1 ,2 ]
Li, Guangxi [1 ,2 ]
Zhang, Huiyuan [3 ]
Wang, Yinshun [1 ,2 ]
机构：
[1] North China Elect Power Univ, Beijing Key Lab High Voltage & EMC, Beijing 102206, Peoples R China
[2] North China Elect Power Univ, State Key Lab Alternate Elect Power Syst Renewabl, Beijing 102206, Peoples R China
[3] North China Elect Power Univ, Sch Elect & Elect Engn, Beijing 102206, Peoples R China
来源：
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2015年 / 25卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Alternate current capacity; frequency dependence; I-V curves; YBCO; LOSSES; TAPES;
D O I：
10.1109/TASC.2014.2365109
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Critical current is generally defined by the dc measurement at which current produces voltage of E-c = 10(-4) Vm(-1). However, most applications of superconductor are operating at alternating current (ac). Moreover, the ac current-carrying capability of superconductor has attracted extensive attention. This paper is aimed to define the transport ac critical current and put forward a novel electric field criterion based on numerical modeling and experimental analysis. YBCO-coated conductor is investigated because of its power application potential and good anisotropy compared to Bi2223/Ag high-temperature superconductor. On measurement of I-V curves of YBCO-coated conductors at different frequency and liquid nitrogen temperature of 77 K, a novel criterion of transport ac critical current was proposed. Numerical modeling of finite element method was carried out, which was coincident with the experimental results.
引用
收藏
页数：5
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