Title :
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
fDate :
6/1/2008 12:00:00 AM
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;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2008.921397
