Investigation on the inductive and resistive fault current limiting HTS power cable

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발행기관 : 한국초전도저온공학회 수록지정보 : 한국초전도저온공학회논문지 / 16권 / 2호 / 59 ~ 63 페이지
저자명 : Sangyoon Lee,Jongho Choi,Dongmin Kim,Yonghyun Kwon,Seokho Kim,Kideok Sim,Jeonwook Cho

영어 초록

HTS power cable bypass the fault current through the former to protect superconducting tapes. On the other hand, the fault current limiting (FCL) power cable can be considered to mitigate the fault current using its increased inductance and resistance. Using the increased resistance of the cable is similar to the conventional resistive fault current limiter. In case of HTS power cable, the magnetic field of HTS power cable is mostly shielded by the induced current on the shield layer during normal operation. However, quench occurs at the shield layer and its current is kept below its critical current at the fault condition. Consequently, the magnetic field starts to spread out and it generates additional inductive impedance of the cable. The inductive impedance can be enhanced more by installing materials of high magnetic susceptibility around the HTS power cable. It is a concept of SFCL power cable. In this paper, a sample SFCL power cable is suggested and experimental results are presented to investigate the effect of iron cover on the impedance generation. The tests results are analyzed to verify the generation of the inductive and resistive impedance. The analysis results suggest the possible applications of the SFCL power cable to reduce the fault current in a real grid.

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Investigation on the inductive and resistive fault current limiting HTS power cable