AC loss properties of a 1 MVA single-phase HTS power transformer

Author

Iwakuma, Masataka ; Funaki, Kazuo ; Kajikawa, Kazuhiro ; Tanaka, Hideki ; Bohno, Takaaki ; Tomioka, Akira ; Yamada, Hisao ; Nose, Shinichi ; Konno, Masayuki ; Yagi, Yujiro ; Maruyama, Hiroshi ; Ogata, Takenori ; Yoshida, Shigeru ; Ohashi, Kouichi ; Tsutsu

Author_Institution

Res. Inst. of Superconductivity, Kyushu Univ., Fukuoka, Japan

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

1482

Lastpage

1485

Abstract

We designed and built a single-phase 1 MVA-22/6.9 kV HTS transformer with the multi-layered cylindrical windings composed of Bi2223 parallel conductors. In advance of the design, the AC loss induced in the windings was estimated on the basis of the observed results in a strand. A subcooled liquid nitrogen cryogenic system with the corresponding cooling capacity was developed and attached to the transformer. The actual AC loss was measured by an electrical method. It was a great part of the total heat load and dominated the temperature rise of subcooled liquid nitrogen. We discussed the validity of the present estimation procedure of the AC loss in the windings as compared with the observed results

Keywords

bismuth compounds; calcium compounds; cooling; high-temperature superconductors; loss measurement; power transformers; strontium compounds; superconducting transformers; 1 MVA; 22 kV; 6.9 kV; AC loss measurement; AC loss properties; Bi2223 parallel conductors; Bi₂Sr₂Ca₂Cu₃O; cooling capacity; multi-layered cylindrical windings; single-phase HTS power transformer; subcooled liquid nitrogen; subcooled liquid nitrogen cryogenic system; temperature rise; total heat load; Circuit faults; Conductors; Cooling; Cryogenics; High temperature superconductors; Nitrogen; Nose; Power transformers; Telephony; Yagi-Uda antennas;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.920054

Filename

920054