Development of REBCO superconducting transformers with a current limiting function

M. Iwakuma, Y. Katanosaka, S. Sato, H. Hayashi, H. Okamoto, Y. Gosho, A. Tomioka, M. Konno, Y. Iijima, T. Saitoh, T. Ohkuma, A. Tagomori, T. Izumi, Y. Shiohara

研究成果: ジャーナルへの寄稿記事

11 引用 (Scopus)

抄録

We designed and fabricated a 10 kVA single-phase transformer with RE 1Ba2Cu3O7-δ (REBCO, RE:Rare Earth, Y, Gd, etc.) superconducting tapes. It had a 4-winding structure at the beginning. In this study, we removed the auxiliary windings and made a test as a general 2-winding transformer. Making repeated short circuit tests, we further investigated the response of the REBCO superconducting windings against a fault excess current. Although the short circuit current decayed satisfactorily, the whole of the REBCO superconducting windings did not shift to normal state even if the short circuit current exceeded the critical current all over the length of REBCO tapes. The induced normal resistance depended on the primary voltage. To study the phenomena, we derived the basic equations and made numerical simulations taking into account of flux-flow state, in which the equivalent resistance and generated heat are much smaller than those in normal state, and also the dependences of the critical current on temperature, applied magnetic field and the applied field angle to the tape face. It was clarified that short circuit current was limited not only by normal resistance but also by flux-flow one. The introduction of the concept of flux-flow state made it possible to quantitatively explain the behavior of the REBCO superconducting transformer at a sudden short circuit.

元の言語英語
記事番号6376116
ジャーナルIEEE Transactions on Applied Superconductivity
23
発行部数3
DOI
出版物ステータス出版済み - 1 21 2013

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transformers
Short circuit currents
short circuit currents
tapes
Critical currents
short circuits
Fluxes
Tapes
critical current
Superconducting tapes
Transformer windings
Electric fault currents
Rare earths
rare earth elements
Magnetic fields
heat
shift
Computer simulation
Electric potential
electric potential

All Science Journal Classification (ASJC) codes

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

これを引用

Development of REBCO superconducting transformers with a current limiting function. / Iwakuma, M.; Katanosaka, Y.; Sato, S.; Hayashi, H.; Okamoto, H.; Gosho, Y.; Tomioka, A.; Konno, M.; Iijima, Y.; Saitoh, T.; Ohkuma, T.; Tagomori, A.; Izumi, T.; Shiohara, Y.

:: IEEE Transactions on Applied Superconductivity, 巻 23, 番号 3, 6376116, 21.01.2013.

研究成果: ジャーナルへの寄稿記事

Iwakuma, M, Katanosaka, Y, Sato, S, Hayashi, H, Okamoto, H, Gosho, Y, Tomioka, A, Konno, M, Iijima, Y, Saitoh, T, Ohkuma, T, Tagomori, A, Izumi, T & Shiohara, Y 2013, 'Development of REBCO superconducting transformers with a current limiting function', IEEE Transactions on Applied Superconductivity, 巻. 23, 番号 3, 6376116. https://doi.org/10.1109/TASC.2012.2232345
Iwakuma, M. ; Katanosaka, Y. ; Sato, S. ; Hayashi, H. ; Okamoto, H. ; Gosho, Y. ; Tomioka, A. ; Konno, M. ; Iijima, Y. ; Saitoh, T. ; Ohkuma, T. ; Tagomori, A. ; Izumi, T. ; Shiohara, Y. / Development of REBCO superconducting transformers with a current limiting function. :: IEEE Transactions on Applied Superconductivity. 2013 ; 巻 23, 番号 3.
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