Development of a HTS magnet system for long-run operation test in sub-cooled nitrogen

Tae Jung Kim, Hyoungku Kang, Min Cheol Ahn, Chanjoo Lee, Duck Kweon Bae, Bok Yeol Seok, Ho Myung Chang, Tae Kuk Ko

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

This paper deals with the development of a 6.6 kV/200 A HTS magnet for inductive superconducting fault current limiter (SFCL) that uses a sub-cooled nitrogen cooling system which is expected to be very useful to the applied HTS machines. The several characteristics of the HTS magnet such as critical current, electrical insulation and heat transfer can be enhanced in the sub-cooled nitrogen cooling system rather than in saturated liquid nitrogen (LN2) cooling system. To obtain sub-cooled nitrogen, LN2 was cooled down to 64 K with GM-cryocooler and its pressure was kept at 101 kPa with gaseous helium. In this investigation, the HTS magnet for a 6.6 kV/200 A SFCL was developed and its long-run operation characteristics were measured and analyzed. The characteristics of the sub-cooled nitrogen system like temperature, level of LN2 and pressure of cryogenic system were not degraded in spite of the several over current tests, electrical insulation tests, and even long-run operation tests with rated transport current.

Original languageEnglish
Article number1643095
Pages (from-to)1324-1327
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume16
Issue number2
DOIs
Publication statusPublished - 2006 Jun 1

Fingerprint

Magnets
cooling systems
Nitrogen
magnets
Cooling systems
Superconducting fault current limiters
electrical insulation
nitrogen
Insulation
Helium
Critical currents
Liquid nitrogen
liquid nitrogen
Cryogenics
cryogenics
critical current
heat transfer
helium
Heat transfer
Temperature

All Science Journal Classification (ASJC) codes

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

Cite this

Kim, Tae Jung ; Kang, Hyoungku ; Ahn, Min Cheol ; Lee, Chanjoo ; Bae, Duck Kweon ; Seok, Bok Yeol ; Chang, Ho Myung ; Ko, Tae Kuk. / Development of a HTS magnet system for long-run operation test in sub-cooled nitrogen. In: IEEE Transactions on Applied Superconductivity. 2006 ; Vol. 16, No. 2. pp. 1324-1327.
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Development of a HTS magnet system for long-run operation test in sub-cooled nitrogen. / Kim, Tae Jung; Kang, Hyoungku; Ahn, Min Cheol; Lee, Chanjoo; Bae, Duck Kweon; Seok, Bok Yeol; Chang, Ho Myung; Ko, Tae Kuk.

In: IEEE Transactions on Applied Superconductivity, Vol. 16, No. 2, 1643095, 01.06.2006, p. 1324-1327.

Research output: Contribution to journalArticle

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