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Fault Current Limiting Characteristic of Non-inductively Wound HTS Magnets in Sub-cooled $LN_2$ Cooling System
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  • Fault Current Limiting Characteristic of Non-inductively Wound HTS Magnets in Sub-cooled $LN_2$ Cooling System
  • Fault Current Limiting Characteristic of Non-inductively Wound HTS Magnets in Sub-cooled $LN_2$ Cooling System
저자명
Park. Dong-Keun,Ahn. Min-Cheol,Yang. Seong-Eun,Lee. Chan-Joo,Seok. Bok-Yeol,Yoon. Yong-Soo,Ko. Tae-Kuk
간행물명
한국초전도·저온공학회논문지
권/호정보
2006년|8권 2호|pp.29-32 (4 pages)
발행정보
한국초전도저온공학회
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정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

An advanced superconducting fault current limiter (SFCL) using $high-T_c$ superconducting (HTS) wire has been developed. The SFCL has a non-inductively wound magnet for reducing loss in normal state. Two types of non-inductively wound magnets, the solenoid type and the pancake type, were designed and manufactured by using Bi-2223 wire in this research. Short-circuit tests of the magnets were performed in sub-cooled $LN_2$ cooling system of 65 K. The magnets are thermally more stable and have a higher critical current in 65 K sub-cooled $LN_2$ cooling system than in 77 K saturated one. Because the resistivity of matrix at 65 K is lower than the resistivity at 77 K, the magnets generate a small resistance to reduce the fault current when the quench occurs. The magnets could limit the fault current to low current level with such a small resistance. The current limiting characteristic of the magnets was analyzed from the test result. The solenoid type was wound in parallel to make it non-inductive. The pancake type was also connected in parallel to be compared with the solenoid type in the same condition. The solenoid type was found to have a good thermal stability compared with the pancake type. It also had as large resistance as the pancake type to limit the fault current in sub-cooled $LN_2$ cooling system.