Determination of Maximum Permissible Temperature Rise Considering Repetitive Over-Current Characteristics of YBCO Coated Conductors

Author

Kim, Min Jae ; Ahn, Min Cheol ; Yang, Seong Eun ; Park, Dong Keun ; Kim, Young Jae ; Ko, Tae Kuk ; Lee, Chanjoo ; Seok, Bok-Yeol

Author_Institution

Sch. of Electr. & Electron. Eng., Yonsei Univ., Seoul

Volume

18

Issue

2

fYear

2008

fDate

6/1/2008 12:00:00 AM

Firstpage

660

Lastpage

663

Abstract

Here we suggest stable maximum temperature criteria of YBCO coated conductors (CCs) considering degradation of YBCO by repetitive exposure to excessive temperature rise. Stable maximum permissible temperature was experimentally determined as the maximum temperature at which CC does not suffer from critical current degradation or burnout. By comparing various over-current characteristics with short-circuit characteristics in regards to the pattern of generated resistance and joule heating flux, maximum permissible temperature rise of YBCO CC in superconducting fault current limiter (SFCL) can be determined as 400 K. Our research is expected to provide rudimental basis for the temperature design of various superconducting power applications including SFCL.

Keywords

barium compounds; critical currents; fault current limiters; high-temperature superconductors; superconducting devices; yttrium compounds; YBCO; coated conductors; critical current degradation; high temperature superconductors; maximum permissible temperature rise; over current; superconducting fault current limiter; temperature 400 K; Coated conductor; high temperature superconductor; over-current; superconducting fault current limiter;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2008.921397

Filename

4497939