Electrical behavior of Bi-2223/Ag tapes under applied alternating over-currents

被引:17
作者
Yim, SW
Lim, SH
Kim, HR
Hwang, SD
Kishio, K
机构
[1] Korea Elect Power Res Inst, Taejon, South Korea
[2] Chonbuk Natl Univ, Res Ctr Ind Technol, Engn Res Inst, Chonju, South Korea
关键词
alternating over-current; Bi-2223/Ag tapes; protection of HTS machine; quench development;
D O I
10.1109/TASC.2005.847493
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
As a study for the protection of HTS power machines operated under AC conditions, the electrical behavior of Bi-2223/Ag tapes with applied alternating over-currents was investigated. Using the HTS tape of 57 A I-c and 106 K T-c, we measured the V-I curves for the over-critical current region from 150 A(P) to 507 A(P). From the experimental results, 3 matters were investigated. Firstly, using the resistance increase data obtained from the curves, quench development was analyzed as a function of the amplitude and duration of the applied currents. Secondly, to understand these phenomena in detail, we investigated the current distribution between the superconductor and the metal sheath in Bi-2223/Ag tape, applying the equivalent equations and data of V-I curves. Finally, we confirmed the relationship between the resistance and temperature generated by the over-critical current experimentally. As a result, we could find the optimal operating condition considering the protection of the HTS tape against the alternating over-current.
引用
收藏
页码:2482 / 2487
页数:6
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