Development of a HTS magnet system for long-run operation test in sub-cooled nitrogen
- Authors
- Kim, Tae Jung; Kang, Hyoungku; Ahn, Min Cheol; Lee, Chanjoo; Bae, Duck Kweon; Seok, Bok-Yeol; Chang, Ho-Myung; Ko, Tae Kuk
- Issue Date
- Jun-2006
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- cryogenic system; HTS magnet; SFCL; sub-cooled nitrogen
- Citation
- IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, v.16, no.2, pp.1324 - 1327
- Journal Title
- IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
- Volume
- 16
- Number
- 2
- Start Page
- 1324
- End Page
- 1327
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/24552
- DOI
- 10.1109/TASC.2006.871212
- ISSN
- 1051-8223
- 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.
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Collections - College of Engineering > Department of Mechanical and System Design Engineering > 1. Journal Articles
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