The short-circuit test results of 6.9 kV/2.3 kV 400 kVA-class YBCO model transformer

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

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Abstract

We are developing an elemental technology for 66 kV/6.9 kV 20 MVA-class power transformer with YBCO conductors. The protection of short-circuit technology is one of the elemental technologies for HTS transformer. Since short-circuit current is much higher than critical current of YBCO tape, there is a possibility that superconducting characteristics may be damaged during short-circuit period. We made a conductor to compose the YBCO tape with copper tape. We manufactured 6.9 kV/2.3 kV 400 kVA-class YBCO model transformer using this conductor and performed short-circuit current test. The short-circuit current of primary winding was 346 A which was about six times larger than the rated current. The I-V characteristics of the winding did not change before and after the test. We may consider this conductor withstands short-circuit current.

Original languageEnglish
Pages (from-to)1374-1378
Number of pages5
JournalPhysica C: Superconductivity and its applications
Volume471
Issue number21-22
DOIs
Publication statusPublished - Nov 1 2011

All Science Journal Classification (ASJC) codes

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

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    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). The short-circuit test results of 6.9 kV/2.3 kV 400 kVA-class YBCO model transformer. Physica C: Superconductivity and its applications, 471(21-22), 1374-1378. https://doi.org/10.1016/j.physc.2011.05.197