AC over-current test results of YBCO conductor for YBCO power transformer with fault current limiting function

A. Tomioka, T. Otonari, T. Ogata, Masataka Iwakuma, H. Okamoto, H. Hayashi, Y. Iijima, T. Saito, Y. Gosho, K. Tanabe, T. Izumi, Y. Shiohara

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We are developing elemental technology for 66 kV/6.9 kV 20 MVA-class YBCO power transformer. The YBCO transformer is considered to have a possibility to stabilize the power system by improving function of fault current limiting. Current limiting behavior functions over critical current flows. There is a possibility that superconducting characteristic may be damaged due to increase in temperature of YBCO tapes. Therefore, we have taken a measure to combine YBCO tape with CuNi tape or Cu Tape. We manufactured model coils using these conductors and conducted the AC over-current tests. The test current was two to seven times larger than the I c of conductor and it was damped with time from its maximum value according to the generation of conductor resistance. We verified the effectiveness of current limiting characteristics. In these tests, the I c of model coil did not degrade. We consider this conductor to be able to withstand AC over-current with the function of current limiting.

Original languageEnglish
Pages (from-to)1367-1373
Number of pages7
JournalPhysica C: Superconductivity and its applications
Volume471
Issue number21-22
DOIs
Publication statusPublished - Nov 1 2011

Fingerprint

Electric fault currents
Power transformers
transformers
Tapes
alternating current
conductors
tapes
Critical currents
coils
critical current
Temperature

All Science Journal Classification (ASJC) codes

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

Cite this

AC over-current test results of YBCO conductor for YBCO power transformer with fault current limiting function. / Tomioka, A.; Otonari, T.; Ogata, T.; Iwakuma, Masataka; Okamoto, H.; Hayashi, H.; Iijima, Y.; Saito, T.; Gosho, Y.; Tanabe, K.; Izumi, T.; Shiohara, Y.

In: Physica C: Superconductivity and its applications, Vol. 471, No. 21-22, 01.11.2011, p. 1367-1373.

Research output: Contribution to journalArticle

Tomioka, A, Otonari, T, Ogata, T, Iwakuma, M, Okamoto, H, Hayashi, H, Iijima, Y, Saito, T, Gosho, Y, Tanabe, K, Izumi, T & Shiohara, Y 2011, 'AC over-current test results of YBCO conductor for YBCO power transformer with fault current limiting function', Physica C: Superconductivity and its applications, vol. 471, no. 21-22, pp. 1367-1373. https://doi.org/10.1016/j.physc.2011.05.196
Tomioka, A. ; Otonari, T. ; Ogata, T. ; Iwakuma, Masataka ; Okamoto, H. ; Hayashi, H. ; Iijima, Y. ; Saito, T. ; Gosho, Y. ; Tanabe, K. ; Izumi, T. ; Shiohara, Y. / AC over-current test results of YBCO conductor for YBCO power transformer with fault current limiting function. In: Physica C: Superconductivity and its applications. 2011 ; Vol. 471, No. 21-22. pp. 1367-1373.
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