Sudden Short-Circuit Test of 22-kV YBCO Triaxial Superconducting Cable

Kazuhisa Adachi, Kei Shiohara, Hideo Sugane, Tasuku Kitamura, Noubuhiro Mido, Takayo Hasegawa, Masayuki Konno, Masataka Iwakuma

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

For the power line between a power generator and a step-up transformer, isolated power bus (IPB) is generally used. The present IPB has a normal cylindrical conductor made of aluminum or copper at the center of the outer jacket and generates very huge Joule loss. To decrease it, superconducting buses have been developing. In this study, a 22-kV 3-kA triaxial superconducting bus was designed and fabricated with YBa2Cu3O7-d (YBCO) tapes and the various kinds of properties were investigated. Previously, the ac and lightning impulse withstand voltage test, critical current Ic test, and ac loss measurement were conducted and it was shown that the developed triaxial superconducting cable met the designed specifications. In this paper, a sudden short-circuit test of a 2-m-long triaxial cable was carried out by using a 200-MVA short-circuit generator. For protection, each phase of the cable was connected to a XLPE cable with a length of 3 m and a cross-sectional area of 250 mm2 in parallel. Three-phase short-circuit current of 25 kA was applied to every phase of the cable bath-cooled with liquid nitrogen at 77 K for 2 s. As a result, the following tremendous phenomenon was demonstrated. Any phase of the triaxial cable kept a flux-flow state and did not quench. Short-circuit current was shared between the superconducting cable and the connected XLPE cable, and the branch current ratio varied even during one period of 60 Hz. The numerical simulation was also conducted to explain the phenomenon theoretically. That should contribute to the instantaneous recovery to a normal operation after a short-period interrupt of the circuit.

Original languageEnglish
Article number5401104
JournalIEEE Transactions on Applied Superconductivity
Volume28
Issue number4
DOIs
Publication statusPublished - Jun 2018

Fingerprint

Superconducting cables
short circuits
Short circuit currents
cables
Cables
short circuit currents
Critical currents
Power transformers
Lightning
Liquid nitrogen
Aluminum
jackets
power lines
Tapes
electric generators
barium copper yttrium oxide
Copper
lightning
liquid nitrogen
transformers

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Sudden Short-Circuit Test of 22-kV YBCO Triaxial Superconducting Cable. / Adachi, Kazuhisa; Shiohara, Kei; Sugane, Hideo; Kitamura, Tasuku; Mido, Noubuhiro; Hasegawa, Takayo; Konno, Masayuki; Iwakuma, Masataka.

In: IEEE Transactions on Applied Superconductivity, Vol. 28, No. 4, 5401104, 06.2018.

Research output: Contribution to journalArticle

Adachi, K, Shiohara, K, Sugane, H, Kitamura, T, Mido, N, Hasegawa, T, Konno, M & Iwakuma, M 2018, 'Sudden Short-Circuit Test of 22-kV YBCO Triaxial Superconducting Cable', IEEE Transactions on Applied Superconductivity, vol. 28, no. 4, 5401104. https://doi.org/10.1109/TASC.2018.2798058
Adachi, Kazuhisa ; Shiohara, Kei ; Sugane, Hideo ; Kitamura, Tasuku ; Mido, Noubuhiro ; Hasegawa, Takayo ; Konno, Masayuki ; Iwakuma, Masataka. / Sudden Short-Circuit Test of 22-kV YBCO Triaxial Superconducting Cable. In: IEEE Transactions on Applied Superconductivity. 2018 ; Vol. 28, No. 4.
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