TY - JOUR
T1 - Current margin against the fault current in REBCO coated conductors
AU - Ishiyama, Atsusi
AU - Momotari, Hiroshi
AU - Wang, Xudong
AU - Arai, Michio
AU - Ueda, Hiroshi
AU - Ohya, Masayoshi
AU - Ohmatsu, Kazuya
AU - Fujiwara, Noboru
N1 - Funding Information:
Manuscript received August 02, 2010; accepted September 29, 2010. Date of publication November 11, 2010; date of current version May 27, 2011. This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) as the Project for Development of Materials & Power Application of Coated Conductors, M-PACC.
PY - 2011/6
Y1 - 2011/6
N2 - The application of yttrium barium copper oxide (YBCO) coated conductors in power cables is anticipated. In practical applications, high-temperature superconducting (HTS) cables can be subjected to short-circuit fault current and are expected to operate for over 30 years. In order to safeguard the current margin of YBCO coated conductors against fault current, we carried out preliminary experiments on overcurrent characteristics using an HTS model cable. Meanwhile, we performed numerical simulations to clarify the electromagnetic and thermal behaviors of the HTS model cable. In this study, we numerically simulated the fault current waveform in each YBCO coated conductor that constitutes an entire cable. We then carried out experiments focusing on the current-voltage (I -V) characteristics and the current margin without causing critical current (Ic) degradation against the fault current by varying the amplitude of the waveform obtained numerically. Furthermore, we repeatedly applied the fault current to a YBCO coated conductor to experimentally investigate the Ic degradation caused by iterative fault current.
AB - The application of yttrium barium copper oxide (YBCO) coated conductors in power cables is anticipated. In practical applications, high-temperature superconducting (HTS) cables can be subjected to short-circuit fault current and are expected to operate for over 30 years. In order to safeguard the current margin of YBCO coated conductors against fault current, we carried out preliminary experiments on overcurrent characteristics using an HTS model cable. Meanwhile, we performed numerical simulations to clarify the electromagnetic and thermal behaviors of the HTS model cable. In this study, we numerically simulated the fault current waveform in each YBCO coated conductor that constitutes an entire cable. We then carried out experiments focusing on the current-voltage (I -V) characteristics and the current margin without causing critical current (Ic) degradation against the fault current by varying the amplitude of the waveform obtained numerically. Furthermore, we repeatedly applied the fault current to a YBCO coated conductor to experimentally investigate the Ic degradation caused by iterative fault current.
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U2 - 10.1109/TASC.2010.2086413
DO - 10.1109/TASC.2010.2086413
M3 - Article
AN - SCOPUS:79957938137
SN - 1051-8223
VL - 21
SP - 3033
EP - 3036
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 3 PART 3
M1 - 5629451
ER -