TY - JOUR
T1 - Degradation of YBCO coated conductors due to an over-current pulse
AU - Ishiyama, Atsushi
AU - Arai, Michio
AU - Momotari, Hiroshi
AU - Wang, Xudong
AU - Ueda, Hiroshi
AU - Saito, Takashi
AU - Aoki, Yuji
AU - Yagi, Masashi
AU - Machi, Takato
AU - Fujiwara, Noboru
N1 - Funding Information:
Manuscript received August 03, 2010; accepted October 16, 2010. Date of publication December 23, 2010; date of current version May 27, 2011. This work was supported by the New Energy and Industrial Technology Development Organization (NEDO). A. Ishiyama, M. Arai, H. Momotari, X. Wang, and H. Ueda are with the Department of Electrical Engineering and Bioscience, Waseda University, Shin-juku-ku, Tokyo 169-8555, Japan (e-mail: atsushi@waseda.jp). T. Saito is with Fujikura, Ltd., 1440, Mutsuzaki, Sakura, Chiba 285-8550, Japan. Y. Aoki is with SWCC Showa Cable Systems Co., Ltd., Sagamihara, Kanagawa 229-1133, Japan. M. Yagi is with Furukawa Electric Co., Ltd, Marunouchi Nakadori Bldg., Chiyodaku, Tokyo 100-8322, Japan. T. Machi and N. Fujiwara are with International Superconductivity Technology Center, Superconductivity Research Laboratory, Koto-ku, Tokyo 135-0062, Japan. Digital Object Identifier 10.1109/TASC.2010.2092396
PY - 2011/6
Y1 - 2011/6
N2 - YBCO coated conductors are candidate materials for future electric power devices such as transmission cables, transformers, and fault current limiters. In practical applications, YBCO coated conductors are subject to short-circuit fault currents greater than the operating current. These fault currents cause heat generation, resulting in degradation of the characteristics of YBCO coated conductors. It is therefore necessary to identify the maximum temperatures under which YBCO coated conductors can operate without suffering degradation. To date, we have carried out preliminary experiments on the degradation of YBCO coated conductors due to an over-current pulse. We also focused on the relationship between increases in temperature and Ic degradation. In this study, we prepared YBCO coated conductors fabricated by TFA-MOD method. We also carried out over-current tests to investigate the Ic degradation and performed numerical simulations on thermal stress to estimate the stress and strain acting on the YBCO layer.
AB - YBCO coated conductors are candidate materials for future electric power devices such as transmission cables, transformers, and fault current limiters. In practical applications, YBCO coated conductors are subject to short-circuit fault currents greater than the operating current. These fault currents cause heat generation, resulting in degradation of the characteristics of YBCO coated conductors. It is therefore necessary to identify the maximum temperatures under which YBCO coated conductors can operate without suffering degradation. To date, we have carried out preliminary experiments on the degradation of YBCO coated conductors due to an over-current pulse. We also focused on the relationship between increases in temperature and Ic degradation. In this study, we prepared YBCO coated conductors fabricated by TFA-MOD method. We also carried out over-current tests to investigate the Ic degradation and performed numerical simulations on thermal stress to estimate the stress and strain acting on the YBCO layer.
KW - Degradation
KW - Over-current pulse
KW - Temperature limitation
KW - Thermal stress analysis
KW - YBCO coated conductors
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U2 - 10.1109/TASC.2010.2092396
DO - 10.1109/TASC.2010.2092396
M3 - Article
AN - SCOPUS:79957950093
SN - 1051-8223
VL - 21
SP - 3025
EP - 3028
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 3 PART 3
M1 - 5674093
ER -