DOI QR코드

DOI QR Code

전압증가 시 재폐로 동작에 따른 변압기형 초전도 한류기의 특성 분석

Characteristics on the Transformer-Type SFCL According to Reclosing Operation the Voltage Increase

  • 투고 : 2010.10.28
  • 심사 : 2010.11.19
  • 발행 : 2010.12.01

초록

Fault current in power system is expected to increase by demand of power capacity. Therefore, when the fault occurred, fault current was increased in the power system. Many studies have been progressed to limit the fault current. Superconducting fault current limiter (SFCL) is one of them which has been studied in worldwide. In this paper, we will analyze characteristics of a transformer-type SFCL by reclosing operation when the voltage increases. Twice opening times in the reclosing of circuit breaker were set as the 0.5 and 15 seconds, respectively. Turn's number of primary and secondary coils set 4:2 and we increased voltages from 120V to 280V for each experiment. By the current waveform, maximum fault current in second and third cycles was lowered when the voltage was increased. In the recovery waveform, recovery time was increased as the voltage was increased. The reason was that power burden of the SFCL increased when consumption power was increased, so the time to get back to SFCL took longer. We compared the characteristics of a resistive-type and transformer-type SFCL. As a result, we found that the fault current of a transformer-type was lower than resistive-type and recovery time of the SFCL was shorter. Consequently, transformer-type SFCL was more profitable for limitation of fault current and recovery time under the same condition for reclosing operation.

키워드

참고문헌

  1. 김준환, 이강완, "전력계통, 고정전류 증대와 대응방안," 전기저널, 1권, 1호, pp. 19, 1998.
  2. R. K. Smith, P. G. Slade, M. Sarkozi, E. J. Stacey, J. J. Bonk, and M. Mehta, "Solid state distribution current limiter and circuit breaker : application requirements and contral strategies," IEEE Trans. Power Deli, Vol. 8, No. 3, p.1155, 1993. https://doi.org/10.1109/61.252640
  3. 임성훈, 최명호, 이현수, 한병성, "차폐유도형 고온초전 도 전류제한기의 설계 및특성시물레이션," 전기학회논문지, 48권, 3호, pp. 173,1999.
  4. Y. S. Cho, H. S. Choi, H. M, Park, S. B. Chung, "Characteristics of Transformer-Type SFCL according to the Connecting Methods of Secondary Coils," KIEE, Vol. 56 No 12,pp. 2078, 2007.
  5. B. H. Choi, B. S. Han, "3차 권선에 저항을 사용한 변압기형 전류제한기의 동작 특성," Journal of the Korean Institute of Electrical and Electronic Material Engineers, Vol. 21, No. 12, pp. 1111, 2008. https://doi.org/10.4313/JKEM.2008.21.12.1111