DOI QR코드

DOI QR Code

Analysis of Transient Characteristics of SFCL using the Three-Phase Transformer and Power Switch

삼상 변압기와 전력용 스위치를 이용한 초전도 한류기의 과도특성 해석

  • 정병익 (조선대학교 공과대학 전기공학과) ;
  • 최효상 (조선대학교 공과대학 전기공학과) ;
  • 박정일 (조선대학교 공과대학 전기공학과) ;
  • 조금배 (조선대학교 공과대학 전기공학과)
  • Received : 2012.08.20
  • Accepted : 2012.09.28
  • Published : 2012.11.01

Abstract

The research of superconducting fault current limiter (SFCL) for reduction of the fault current is actively underway in the worldwide. In this paper, we analyzed the characteristics of a SFCL using the transformer and superconducting elements combined mutually in accordance with the fault types. The structure of this SFCL was composed of the secondary and third windings of a transformer connected to the load and the superconducting element, respectively. The provided electric power flew into the load connected to the secondary winding of the transformer in normal state. On the other hand, when the fault occurred in power system, the fault current was limited by closing the line of third winding of the transformer. At this time, the effect of the fault was minimized by opening the fault line in secondary winding of a transformer in power system. The sensing of the fault state was performed by the current transformer(CT) and then turn-on and turn-off switching behavior of the secondary line in the transformer was performed by the silicon-controlled rectifier(SCR). As a result, the proposed SFCL limited the fault current within one-cycle efficiently. Also, the degradation of the superconducting element in the normal state was avoided.

Keywords

Superconducting Fault Current Limiter (SFCL);Transformer;Power switch

Acknowledgement

Supported by : 한국연구재단

References

  1. Hyo-Sang Choi, Byung-Ik Jung, and Yong-Sung Cho, "Transient Characteristics of a Flux-Coupling Type Superconducting Fault Current Limiter According to Winding Direction," IEEE Trans. Appl. Superconduct., vol. 19, no. 3, pp. 1827-1830, 2009 https://doi.org/10.1109/TASC.2009.2017836
  2. Hyo-Sang Choi, Yong-Sun Cho, and Sung-Hun Lim, "Operational characteristics of hybrid-type SFCL by the number of secondary windings with YBCO films," IEEE Trans. Appl. Supercond., Vol. 16, No. 2, pp. 719-722, June 2006. https://doi.org/10.1109/TASC.2006.871270
  3. S. Kozak, and T. Janowski, "Physical and numerical models of superconducting fault current limiters," IEEE Trans. Appl. Supercond., Vol. 13, No. 2, pp. 2068-2071, June 2003. https://doi.org/10.1109/TASC.2003.812989
  4. C.A. Baldan, C.Y. Shigue, D.S.S. Figueira, E.R. Filho, and R.C. Freitas, "Test results of a superconducting FCL using bifilar coil of BSCCO-2212," IEEE Trans. Appl. Supercond., Vol. 16, No. 2, pp. 695-698, June 2006. https://doi.org/10.1109/TASC.2006.871264
  5. Hyo-Sang Choi, Yong-Sun Cho, "Critical Current Equalization via Neutral Lines in a Transformer-Type SFCL," IEEE Trans. Appl. Supercond., Vol. 18, No. 2, pp. 733-736, June 2008. https://doi.org/10.1109/TASC.2008.920635
  6. Hyo-Sang Choi, Sung-Hun Lim, "Operating Performance of the Flux-Lock and the Transformer Type Superconducting Fault Current Limiter Using the YBCO Thin Films," IEEE Trans. Appl. Supercond., Vol. 17, No. 2, pp. 1823-1826, June 2007. https://doi.org/10.1109/TASC.2007.898482
  7. Ok-Bae Hyun, Sang-Do Cha, Hye-Rim Kim, Hyo-Sang Choi, Si-Dol Hwang, "Shunt-assisted simultaneous quenches in series-connected resistive SFCL components," IEEE Trans. Appl. Supercond., Vol. 13, No. 2, pp. 2060-2063, June 2003. https://doi.org/10.1109/TASC.2003.812986
  8. Jin-Seok Kim, Sung-Hun Lim, and Jae-Chul Kim, "Comparative Analysis on current limiting characteristics of hybrid superconducting fault current limiters (SFCLs) with first half cycle limiting and non-limiting operation," Journal of Electrical Engineering & Technology, vol. 7, no. 5, pp. 659-663, 2012. https://doi.org/10.5370/JEET.2012.7.5.659
  9. Hyo-Sang Choi, Byung-Ik Jung, and Yong-Sung Cho, "Transient Characteristics of a Flux-Coupling Type Superconducting Fault Current Limiter According to Winding Direction," IEEE Trans. Appl. Superconduct., vol. 19, no. 3, pp. 1827-1830, 2009. https://doi.org/10.1109/TASC.2009.2017836