Overcurrent characteristics of 1 m long superconducting model cable using YBCO coated conductors

Hiroshi Ueda, X. Wang, A. Ishiyama, S. Mukoyama, M. Yagi, N. Kashima, S. Nagaya, Y. Shiohara

Research output: Contribution to journalArticle

Abstract

In applications to power transmission cables, a number of YBCO tapes would be assembled and wound spirally on a Cu former. The YBCO tapes and the Cu former would be connected in parallel and could be subjected to short-circuit fault currents 10 to 30 times the operating current. The fault currents would drive the YBCO tapes into the normal state and thus generate Joule heating for the duration of the fault. Therefore, in order to examine the stability and feasibility of YBCO power transmission cables, it is important to demonstrate the redistribution of the transport current and the electromagnetic coupling between the YBCO tapes and the Cu former during a short-circuit fault current. We constructed a 1 m long superconducting model cable and subjected it to an overcurrent with a peak of 31.5 kArms for a duration of 2.0 s, as established by JEC (Japanese Electrotechnical Committee), in a liquid nitrogen bath. We examined the redistribution of the transport current between the YBCO sample tapes and the Cu former by using Hall probes. In addition, we developed a novel computer code based on the finite element method and an equivalent circuit in order to clarify the characteristics of the redistribution of the transport current and the thermal behaviour within the cable. Finally, we designed a 10 m long cable that would reach the degradation temperature of the YBCO tape due to the fault currents.

Original languageEnglish
Article number012168
JournalJournal of Physics: Conference Series
Volume97
Issue number1
DOIs
Publication statusPublished - Feb 1 2008
Externally publishedYes

Fingerprint

cables
conductors
tapes
power transmission
short circuits
electromagnetic coupling
Joule heating
equivalent circuits
liquid nitrogen
baths
finite element method
degradation
computer programs
probes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Overcurrent characteristics of 1 m long superconducting model cable using YBCO coated conductors. / Ueda, Hiroshi; Wang, X.; Ishiyama, A.; Mukoyama, S.; Yagi, M.; Kashima, N.; Nagaya, S.; Shiohara, Y.

In: Journal of Physics: Conference Series, Vol. 97, No. 1, 012168, 01.02.2008.

Research output: Contribution to journalArticle

Ueda, Hiroshi ; Wang, X. ; Ishiyama, A. ; Mukoyama, S. ; Yagi, M. ; Kashima, N. ; Nagaya, S. ; Shiohara, Y. / Overcurrent characteristics of 1 m long superconducting model cable using YBCO coated conductors. In: Journal of Physics: Conference Series. 2008 ; Vol. 97, No. 1.
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