지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
오류제보하기
When the fault occurs in power system, the fault-current exceeds breaking capacity of the circuit breaker. So, reliablity of the power system is decreased sharply. Superconducting fault-current limiter (SFCL) is operated without impedance in normal state. The fault-current is limited by its impedance during the fault condition. However, the SFCL has several weak points such as huge size, high-price, liquid-nitrogen operation for the real power system. In this paper, We suggested the high-speed interrupter to limit the fault- current in case of the single line-to-ground fault. In addition, we compared the high-speed interrupter with the SFCL to ensure the operation reliability. The proposed interrupter detected the fault-current through the CT, and the power was supplied by operation of the SCR control system. In this experiment, the power of high-speed interrupter was applied after the 4.8[msec] from fault instant. The on-off operation of the interrupter was started after half-cycle from the fault. The fault-current was flowed into the impedance element by the switching operation of the high-speed interrupter. So, the fault current was limited within one cycle, and then it didnt exceed the capacity of a circuit breaker. We confirmed that there was slight difference between the SFCL with high-speed interrupter in terms of limiting-time of the fault-current and switching speed of the SCR. The high-speed interrupter was considered to be more efficient than the SFCL in size, cost or reliability.
목차
Abstract
1. 서론
2. 본론
3. 결론
References
감사의 글
저자소개
참고문헌 (5)
참고문헌 신청
1. [학술지(정기간행물)] - H. S. Choi / 2001 / Quench characteristics of resistive superconducting fault current limiters based on YBCO films / Physica C 351 : 415 ~ 420
2. [학술지(정기간행물)] - H. S. Choi / 2002 / Switching properties of hybrid type superconducting fault current limiter using YBCO stripes / IEEE Trans. Appl. Supercond 12 : 1833 ~ 1838
3. [학위논문] - J. T. You / 2005 / A study on the improvement of reliability on electric power system as the increase of fault capacity
4. [학술대회논문] - H. R. Kim / 2007 / Analysis on recovery characteristics of superconduvting fault current limiter / MT-20 Conference on Magnet Technology
5. [학술지(정기간행물)] - K. H. Ha / 2012 / Operational Behaviors of Flux-Coupling Type SFCL Using Integrated Three Phase Transformer Under Transient State / IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 22 (3) : 5601604 ~ 5601604
2. [학술지(정기간행물)] - H. S. Choi / 2002 / Switching properties of hybrid type superconducting fault current limiter using YBCO stripes / IEEE Trans. Appl. Supercond 12 : 1833 ~ 1838
3. [학위논문] - J. T. You / 2005 / A study on the improvement of reliability on electric power system as the increase of fault capacity
4. [학술대회논문] - H. R. Kim / 2007 / Analysis on recovery characteristics of superconduvting fault current limiter / MT-20 Conference on Magnet Technology
5. [학술지(정기간행물)] - K. H. Ha / 2012 / Operational Behaviors of Flux-Coupling Type SFCL Using Integrated Three Phase Transformer Under Transient State / IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 22 (3) : 5601604 ~ 5601604
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UCI(KEPA) : I410-ECN-0101-2014-560-000596412