Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)
- 2005.07a
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- Pages.54-56
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- 2005
Analysis of Fault Current limiting Characteristics According to Fault Type in Integrated Three-Phase Flux-Lock Type Superconducting Fault Current limiting
사고종류에 따른 삼상 일체화된 자속구속형 SFCL의 사고전류제한특성 분석
- Park, Chung-Ryul (Chonbuk National Uni.) ;
- Lim, Sung-Hun (Research Center of Industrial Technology, Chonbuk National Uni.) ;
- Park, Hyoung-Min (Chosun Univ.) ;
- Cho, Yong-Sun (Chosun Univ.) ;
- Choi, Hyo-Sang (Chosun Univ.) ;
- Han, Byoung-Sung (Chonbuk National Uni.)
- 박충렬 (전북대학교 전기공학과) ;
- 임성훈 (전북대학교 공업기술연구센터) ;
- 박형민 (조선대학교 전기공학과) ;
- 조용선 (조선대학교 전기공학과) ;
- 최효상 (조선대학교 전기공학과) ;
- 한병성 (전북대학교 전기공학과)
- Published : 2005.07.07
Abstract
In this paper, we investigated the quench characteristics of HTSC elements in the integrated three-phase flux-lock type SFCL according to fault types such as the single-line-to-ground fault, the double-line-to-ground fault, the line-to-line fault and the three-line-to-ground fault. The integrated three-phase flux-lock type SFCL was the upgrade version of the single-phase flux-lock type SFCL. The structure of the integrated three-phase flux-lock type SFCL consisted of three-phase flux-lock reactor wound on an iron core with the ratio of the same turn between coil 1 and coil 2 in each phase. When the SFCL is operated under the normal condition, the flux generated in the iron core is zero because the flux generated between two coils of each single phase is canceled out. Therefore, the SFCL's impedance is zero, and the SFCL has negligible influence on the power system. However, if a fault occurs in any single-phase among three phases, the flux generated in the iron core is not zero any more. The flux makes HTSC elements of all phases quench irrespective of the fault type, which reduces the current of fault phase as well as the current of sound phase. It was observed that the fault current limiting characteristics of the suggested SFCL were dependent on the quench characteristics of HTSC elements in all three phases.