Development of a 630 kVA Three-Phase HTS Transformer With Amorphous Alloy Cores

Author

Wang, Yinshun ; Zhao, Xiang ; Han, Junjie ; Li, Huidong ; Guan, Ying ; Bao, Qing ; Xiao, Liye ; Lin, Liangzhen ; Xu, Xi ; Song, Naihao ; Zhang, Fengyuan

Author_Institution

Chinese Acad. Sci., Beijing

Volume

17

Issue

2

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

2051

Lastpage

2054

Abstract

This paper describes design and operation of a three-phase HTS power transformer with capacity of 630 kVA operated in liquid nitrogen of 77 K for primary/secondary voltages of 10.5 kV/0.4 kV. The windings were wound by hermetic stainless steel-enforced multifilamentary Bi2223/Ag tapes. The structures of primary and secondary windings are solenoid and double-pancake respectively. Cryostat is made from electrical insulating materials with room temperature bore for commercial amorphous alloy core. Fundamental characteristics of the transformer are obtained by standard short-circuit and no-load tests. The ac losses were calculated and measured by method of conventional transformer. The HTS power transformer successfully operated in a live power grid.

Keywords

cryostats; high-temperature superconductors; power transformers; superconducting tapes; superconducting transformers; HTS power transformer; ac losses; amorphous alloy cores; cryostat; electrical insulating materials; hermetic stainless steel; live power grid; multifllamentary tapes; three-phase HTS transformer; Amorphous materials; Boring; Dielectrics and electrical insulation; High temperature superconductors; Nitrogen; Power transformer insulation; Power transformers; Solenoids; Transformer cores; Wounds; AC losses; Bi2223/Ag hermetic tapes; amorphous alloy core; high temperature superconductor (HTS) transformer; windings;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2007.898162

Filename

4277802