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정인성 ( In Sung Jeong ) 조선대학교 공학기술연구원 2014 공학기술논문지 Vol.7 No.1
본 논문에서는 계통에서 가장 많이 발생 할 수 있는 지락사고를 발생시켜 사고전류의 제한특성을 분석하였다. 분석결과 사고 후 제한된 사고전류는 초전도한류기를 적용할 경우와 크게 다르지 않는 것으로 나타났다. 또한 인터럽터의 동작시간도 짧기 때문에 배전계통 적용 시 2차 사고의 예방과 보호기기와 보호협조도 유연할 것으로 분석되었다.
In-Sung Jeong(정인성),Byung-Ik Jung(정병익),Hyo-Sang Choi(최효상) 대한전기학회 2015 전기학회논문지 Vol.64 No.4
This paper proposed an high-speed superconducting fault current limiter (H-SFCL). The proposed H-SFCL functioned the initial fault current could be covered by the SFCL and the continued fault current after the one-cycle from fault occurrence could be controlled current-limiting-element of the normal conduction. To investigate the operation characteristics of the H-SFCL, a simulation power system was constructed, and a single line-to-ground fault was occurred. As a result, the H-SFCL limited the fault current by more than about 70%, and it was confirmed that the electric power burden was reduced compared to the SFCL that consisted only of superconductors.
초전도 코일을 적용한 자기공명방식 무선전력전송의 송 · 수신 코일 배열에 따른 효율 분석
강민상(Min-Sang Kang),최효상(Hyo-Sang Choi),정인성(In-Sung Jeong) 대한전기학회 2014 전기학회논문지 Vol.63 No.6
In this paper, we analyzed the efficiency of magnetic resonance wireless power transmission (WPT) using superconductor coil according to the changing position of transmission and receiving coils. We implemented a WPT system using a magnetic resonance at a frequency of 63.1 kHz. Transmission and receiving coils using superconductor coil were wound on a spiral manner of diameter 100mm. For comparison, transmission and receiving coils using normal conductor coil were designed under the same condition. At a distance of 50mm, we measured efficiency when transmission-receiving coils were matched 25%, 50%, 75% and 100%. When a superconductor coil was applied to the transmission and receiving units, efficiency of WPT was very high. In addition, in the case of the superconducting transmission-receiving coils, when coils matched 100% the efficiency was 30% and matched 25% the efficiency was 8%.