Development of a 22kV/6.9kV single-phase model for a 3MVA HTS power transformer

Kazuo Funaki, Masataka Iwakuma, Kazuhiro Kajikawa, Masanori Hara, Junya Suehiro, Takehiro Ito, Yasuyuki Takata, Takaaki Bohno, Shin Ichi Nose, Masayuki Konno, Yujiro Yagi, Hiroshi Maruyama, Takenori Ogata, Shigeru Yoshida, Kouichi Ohashi, Hironobu Kimura, Katsuya Tsutsumi

Research output: Contribution to journalConference article

73 Citations (Scopus)

Abstract

We have developed a 22kV/6.9kV HTS single-phase transformer cooled by liquid nitrogen for field test, which is a practical model for the single-phase part of a 3MVA HTS power transformer. First, we numerically simulated electromagnetic, mechanical and thermal conditions of the windings in accidental cases of short-circuit and lightning impulse, and considered the winding structure withstanding the severe loads. We constructed a small-sized model coil of Bi-2223 Ag/Mn-sheathed tapes and confirmed applicability of the design concept for the over-current and high-withstand-voltage tests. We designed and constructed a single-phase HTS transformer on the basis of the model-coil-test results. The primary and secondary windings are transposed parallel conductors of two and six Bi-2223 Ag/Mn tapes, respectively. The same tests for the HTS transformer as for usual oil-filled ones indicated the reliable operation and high performance. The field test in a distribution grid of Kyushu Electric Power Co. included inrush-current test and long-term operation of the transformer cooled by a continuous supply system of subcooled liquid nitrogen with cryocoolers.

Original languageEnglish
Pages (from-to)1578-1581
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume11
Issue number1 II
DOIs
Publication statusPublished - Mar 1 2001
Event2000 Applied Superconductivity Conference - Virginia Beach, VA, United States
Duration: Sep 17 2000Sep 22 2000

Fingerprint

Power transformers
transformers
Liquid nitrogen
Tapes
field tests
liquid nitrogen
tapes
Lightning
coils
Short circuit currents
Oils
short circuits
lightning
electric power
Electric potential
impulses
high voltages
conductors
oils
grids

All Science Journal Classification (ASJC) codes

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

Cite this

Development of a 22kV/6.9kV single-phase model for a 3MVA HTS power transformer. / Funaki, Kazuo; Iwakuma, Masataka; Kajikawa, Kazuhiro; Hara, Masanori; Suehiro, Junya; Ito, Takehiro; Takata, Yasuyuki; Bohno, Takaaki; Nose, Shin Ichi; Konno, Masayuki; Yagi, Yujiro; Maruyama, Hiroshi; Ogata, Takenori; Yoshida, Shigeru; Ohashi, Kouichi; Kimura, Hironobu; Tsutsumi, Katsuya.

In: IEEE Transactions on Applied Superconductivity, Vol. 11, No. 1 II, 01.03.2001, p. 1578-1581.

Research output: Contribution to journalConference article

Funaki, K, Iwakuma, M, Kajikawa, K, Hara, M, Suehiro, J, Ito, T, Takata, Y, Bohno, T, Nose, SI, Konno, M, Yagi, Y, Maruyama, H, Ogata, T, Yoshida, S, Ohashi, K, Kimura, H & Tsutsumi, K 2001, 'Development of a 22kV/6.9kV single-phase model for a 3MVA HTS power transformer', IEEE Transactions on Applied Superconductivity, vol. 11, no. 1 II, pp. 1578-1581. https://doi.org/10.1109/77.920079
Funaki, Kazuo ; Iwakuma, Masataka ; Kajikawa, Kazuhiro ; Hara, Masanori ; Suehiro, Junya ; Ito, Takehiro ; Takata, Yasuyuki ; Bohno, Takaaki ; Nose, Shin Ichi ; Konno, Masayuki ; Yagi, Yujiro ; Maruyama, Hiroshi ; Ogata, Takenori ; Yoshida, Shigeru ; Ohashi, Kouichi ; Kimura, Hironobu ; Tsutsumi, Katsuya. / Development of a 22kV/6.9kV single-phase model for a 3MVA HTS power transformer. In: IEEE Transactions on Applied Superconductivity. 2001 ; Vol. 11, No. 1 II. pp. 1578-1581.
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