SMES-UPS for large-scaled SC magnet system of LHD

Shuichi Yamada, T. Mito, H. Chikaraishi, A. Nishimura, H. Kojima, Y. Nakanishi, T. Uede, T. Satow, O. Motojima

Research output: Contribution to journalArticle

Abstract

The LHD is an SC experimental fusion device of heliotron type. Eight sets of the helium compressors with total electric power of 3.5 MW are installed in the cryogenic system. The analytical studies of the SMES-UPS for the compressors under the deep voltage sag are reported in this paper. The amplitude and frequency of the voltage decrease gradually by the regenerating effect of the induction motors. The SMES-UPS system proposed in this report has the following functions; (1) variable frequency control, (2) regulations by ACR and AVR, and (3) rapid isolation and synchronous reconnection from the loads to grid line. We have demonstrated that SMES was useful for the large-scaled cryogenic system of the experimental fusion device.

Original languageEnglish
Pages (from-to)1149-1153
Number of pages5
JournalFusion Engineering and Design
Volume66-68
DOIs
Publication statusPublished - 2003 Sep 1
Externally publishedYes

Keywords

  • Cryogenic system
  • Induction motor
  • LHD
  • SMES
  • UPS
  • Voltage sag

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'SMES-UPS for large-scaled SC magnet system of LHD'. Together they form a unique fingerprint.

  • Cite this

    Yamada, S., Mito, T., Chikaraishi, H., Nishimura, A., Kojima, H., Nakanishi, Y., Uede, T., Satow, T., & Motojima, O. (2003). SMES-UPS for large-scaled SC magnet system of LHD. Fusion Engineering and Design, 66-68, 1149-1153. https://doi.org/10.1016/S0920-3796(03)00297-7