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이중퀜치를 이용한 자속구속형 초전도한류기의 과도전류제한 특성
최상재,임성훈,Choi, Sang-Jae,Lim, Sung-Hun 한국전기전자재료학회 2017 전기전자재료학회논문지 Vol.30 No.2
In this paper, the flux-lock type superconducting fault current limiter (SFCL) using double quench was suggested and its transient current limiting characteristics were analyzed. The suggested flux-lock type SFCL using double quench consists of two magnetically coupled windings and two $high-T_{c}$ superconducting (HTSC) elements connected in series with each winding. To analyze the transient current limiting characteristics of the flux-lock type SFCL using double quench, the short-circuit tests according to the fault angles, which affect the transient component of the fault current right after the fault occurs, were executed. From the comparative analysis for the short-circuit tests at both $0^{\circ}$ and $90^{\circ}$ fault angles, the useful transient current limiting operations of the suggested flux-lock type SFCL through the double or the single quench occurrence were confirmed.
단일·이중소자를 이용한 자기결합 초전도 한류기의 자화특성 및 누적에너지 비교분석
최상재,김보희,임성훈,Choi, Sang-Jae,Kim, Bo-Hee,Lim, Sung-Hun 한국전기전자재료학회 2017 전기전자재료학회논문지 Vol.30 No.2
In this paper, the magnetization characteristics and the stored energy of magnetically coupled superconducting fault current limiter (SFCL)s using single and double high-Tc superconducting (HTSC) elements were compared. To analyze the magnetization characteristics and the stored energy, the magnetizing current and the flux linkage, which were derived from the electrical equivalent circuit of the SFCL using single and double HTSC elements, were calculated from the voltages and the current measured in the short-circuit tests. Through the comparative analysis on the magnetization characteristics and the stored energy for SFCL using sing and double HTSC elements, the magnetically coupled SFCL using double HTSC elements was shown to be more effective than the SFCL using single HTSC element from the point of view of the magnetic saturation.
자기결합 이중퀜치 초전도 한류기의 고장각에 따른 과도상태 전자기학적 특성분석
최상재(Sang-Jae Choi),임성훈(Sung-Hun Lim) 한국조명·전기설비학회 2017 조명·전기설비학회논문지 Vol.31 No.1
In this paper, double quench of superconducting fault current limiter(SFCL) using parallel magnetic coupling was studied. Magnetic coupling has been known with no electrical direct connection but magnetic connection. Also, it is known to be safer than non magnetic coupling superconducting fault current limiter. Double quench SFCL is effective to limit large current. It is included in inductive-type SFCL and is more stable on heat for resistive, rectifier-type SFCL. Amplitude of electric and magnetic field distribution on double quench SFCL were obtained through its equivalent circuit and imitating experiments.