Development of UPS-SMES as a protection from momentary voltage drop

Author

Mito, Toshiyuki ; Kawagoe, Akifumi ; Chikaraishi, Hirotaka ; Okumura, Kagao ; Abe, Ryo ; Baba, Tomosumi ; Yamauchi, Kenji ; Yokota, Mitsuhiro ; Henmi, Tsutomu ; Seo, Kazutaka ; Hayashi, Kazuo ; Iwakuma, Masataka ; Sumiyoshi, Fumio

Author_Institution

National Inst. for Fusion Sci., Toki, Japan

Volume

14

Issue

2

fYear

2004

fDate

6/1/2004 12:00:00 AM

Firstpage

721

Lastpage

726

Abstract

We have been developing the UPS-SMES as a protection from momentary voltage drop and power failure. The superconducting system is suitable as electric power storage for large energy extraction in a short time. The most important feature of superconducting coil system for the UPS-SMES is easy handling and maintenance-free operation. We have selected low temperature superconducting (LTS) coils instead of high temperature superconducting (HTS) coils from the viewpoint of cost and performance. However, it is difficult for the conventional LTS coils to fulfill maintenance-free operation since the cooling methods are either pool boiling with liquid helium or forced flow of supercritical helium. Thus, a conduction cooled LTS pulse coil has been designed as a key component of the UPS-SMES. The development program of 1 MW, 1 sec UPS-SMES is explained.

Keywords

cooling; power supply quality; power system faults; power system protection; superconducting coils; superconducting magnet energy storage; uninterruptible power supplies; 1 MW; 1 s; LTS coils; LTS pulse coil; UPS-SMES development; conduction cooling; cooling methods; electric power storage; forced flow supercritical helium; large energy extraction; liquid helium; low temperature superconducting coils; maintenance-free operation; momentary voltage drop protection; pool boiling; power failure protection; superconducting coil system; superconducting system; uninterruptible power supplies; Control systems; DC-DC power converters; High temperature superconductors; Power system protection; Samarium; Superconducting coils; Superconducting magnetic energy storage; Switches; Uninterruptible power systems; Voltage; Conduction cooled; UPS SMES; momentary voltage drop; power failure;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2004.830084

Filename

1324894