Transient stability analysis of large aluminum stabilized superconductor by 2D and 3D finite element analysis

Tomokazu Tsuchiya, So Noguchi, Hideo Yamashita, Atsushi Ishiyama, Nagato Yanagi, Toshiyuki Mito

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Very-large-current composite superconductors are used in SMES coils and fusion applications. These superconductors have large cross-sectional areas of high purity aluminum to improve their stability. Once a normal zone is initiated in such superconductors, the current transfers from the superconducting strands to the aluminum stabilizer according to the Maxwell's equations and the temperature distribution. However, the time constant of current diffusion in the aluminum stabilizer is very long as electrical resistivity of aluminum is very low. Therefore, excess Joule heating is generated in a small region of aluminum stabilizer near superconducting strands, and the temperature increases locally. Some 2D numerical analyses have been carried out in order to investigate the transient stability of the superconductor applied to the Helical Coil of LHD in National Institute for Fusion Science. But, as the performance of computers have improved, huge numerical simulations are new feasible. So we wrote a 3D finite element analysis code ourselves to carry out some now analyses that we compared with 2D analysis.

Original languageEnglish
Pages (from-to)1330-1333
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume14
Issue number2
DOIs
Publication statusPublished - 2004 Jun 1

Keywords

  • 3D numerical analysis
  • Aluminum stabilized superconductor
  • Minimum normal-zone propagation velocity
  • Transient stability

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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