Conceptual design of 100 MVA high temperature superconducting auto-transformers

Author

Nagasawa, Toru ; Yamaguchi, Mitsugi ; Fukui, Satoshi

Author_Institution

Graduate Sch. of Sci. & Technol., Niigata Univ., Japan

Volume

13

Issue

2

fYear

2003

fDate

6/1/2003 12:00:00 AM

Firstpage

2306

Lastpage

2309

Abstract

This paper describes the conceptual design of 100 MVA high temperature superconducting (HTS) autotransformers as well as coreless ones having the rating of three-phase, 50 Hz, and 132 kV/66 kV. Each one is compared with conventional oil-immersed autotransformers. The HTS autotransformers with core will provide a percent impedance of 11.7% close to the conventional one and require an air gap field of 0.33 T, while the coreless HTS autotransformers require 25.8% and 0.7 T respectively. HTS autotransformers with a core have a 22% smaller window size and 0.3% higher efficiency than conventional ones. The coreless HTS autotransformers need HTS tapes about two times the length required for the HTS autotransformer with a core.

Keywords

autotransformers; high-temperature superconductors; superconducting tapes; superconducting transformers; 0.33 T; 0.7 T; 100 MVA; 132 kV; 50 Hz; 66 kV; HTS tapes; air gap field; coreless autotransformer; efficiency; high temperature superconducting auto-transformers; percent impedance; window size; Fault current limiters; High temperature superconductors; Impedance; Low voltage; Magnetic field induced strain; Research and development; Superconducting coils; Superconducting devices; Superconducting magnetic energy storage; Transformer cores;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2003.813101

Filename

1212082