한국전자통신학회논문지 (The Journal of the Korea institute of electronic communication sciences)

한국전자통신학회 (Korea Institute of Electronic Communication Science)
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한류기용 초전도 선재개발에 관한 연구

A Study on Development of Superconducting Wires for a Fault Current Limiter

  • 황광수 (국립목포대학교 대학원) ;
  • 이헌주 ((주)서남) ;
  • 문채주 (국립목포대학교 스마트그리드연구소)
  • 투고 : 2022.02.14
  • 심사 : 2022.04.17
  • 발행 : 2022.04.30
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초록

초전도 한류기는 초전도 전이를 이용하여 전류를 제어하는 전력기기로, 수 msec 이내에 고장전류를 정상전류로 변환하여 전력계통의 유연성, 안정성 및 신뢰성을 높일 수 있는 기기이다. 고온초전도 선재는 상전이 속도가 빠르고 임계전류밀도가 높으며 교류손실이 적어 초전도 한류기에 적합한 소재이지만 최적화 연구가 부족함에 따라 고온초전도 선재 특성에 의존하는 기존 방식은 한류소자의 설계, 투입 선재의 양 등에 있어 비효율적이다. 따라서 초전도 한류기에 적합한 선재를 개발하기 위해 임계전류 균일도 향상, 최적의 안정화재 재료 선정 및 균일 적층 기술 개발 연구가 수행되었다. 본 연구를 통하여 개발된 고온 초전도 선재는 710m 길이에서 평균 804 A/12mm-w의 임계전류를 가지는 선재제조 기술을 확보함에 따라 효율성 향상, 비용 절감 및 크기 축소로 경제적 성과를 확보할 수 있었다.

A superconducting fault current limiter(SFCL) is a power device that exploits superconducting transition to control currents and enhances the flexibility, stability and reliability of the power system within a few milliseconds. With a high phase transition speed, high critical current densities and little AC loss, high-temperature superconducting (HTS) wires are suitable for a resistive-type SFCL. However, HTS wires due to the lack of optimization research are rather inefficient to directly apply to a fault current limiter in terms of the design and capacity, for the existing method relied the characteristics. Therefore, in order to develop a suitable wire for an SFCL, it is necessary to enhance critical current uniformity, select optimal stabilizer materials and conducted research on the development of uniform stabilizer layering technology. The high temperature superconducting wires manufactured by this study get an average critical current of 804 A/12mm-width at the length of 710m; therefore, conducted research was able to secure economic performance by improving efficiency, reducing costs, and reducing size.

키워드

과제정보

This study is a joint project by Korea Electric Power Corporation (KEPCO) and SuNAM Co., Ltd., which was conducted in 2018. We would like to thank all organizations and persons who contributed to this study.

참고문헌

  1. M. Ahn, B. Seok, and T. Ko, "Repetitive Over-current Properties of YBCO Coated Conductor for Applying to SFCL," J. of the Korea Institute of Applied Superconductivity and Cryogenics, vol. 9, no. 3, pp. 26-31, 2007.
  2. E. Park and Y. Kim, "Experimental Analysis for core Losses Prediction in Electric Machines by Using Soft Magnetic Composite," J. of the Korea Institute of Electronic Communication Sciences, vol. 16, no. 3, 2021, pp. 471-476. https://doi.org/10.13067/JKIECS.2021.16.3.471
  3. C. Kim, "A Theory of Specific Heat Discontinuity of the Super Conducting Crystals by Using the Linear Model for Critical Magnetic Field," J. of the Korea Institute of Electronic Communication Sciences, vol. 13, no. 1, 2018, pp. 23-28. https://doi.org/10.13067/JKIECS.2018.13.1.23
  4. B. Douine, K. Berger, and N. Ivanov, "Characterization of High-Temperature Superconductor Bulks for Electrical Machine Application," MDPI Materials, vol. 14, issue 1636, 2021, pp. 1-12.
  5. Y. Ko, "A Study on the Application Cases of High Temperature Superconductivity to Electrical Power System," J. of the Korea Institute of Electronic Communication Sciences, vol. 10, no. 7, 2015, pp. 775-780. https://doi.org/10.13067/JKIECS.2015.10.7.775
  6. D. Yoon, "A Feasibility Study on HTS Cable for the Grid Integration of Renewable Energy," Phsics Procedia, vol. 45, 2013, pp. 281-284. https://doi.org/10.1016/j.phpro.2013.05.022
  7. O. Hyun, "Development of the 6.6 kV Resistive-type Superconducting Fault Current Limiters," J. of the Korea Institute of Applied Superconductivity and Cryogenics, vol. 6, no. 2, 2004, pp. 21-25.
  8. B. Jung, "Analysis of Operation Characteristics of DC Circuit Breaker with Superconducting Current Limiting Element," J. of the Korea Institute of Electronic Communication Sciences, vol. 15, no. 6, 2020, pp 1069-1074. https://doi.org/10.13067/JKIECS.2020.15.6.1069
  9. O. Hyun, "Brief Review of the Field Test and Application of a Superconducting Fault Current Limiter," Progress in Superconductivity and Cryogenics, vol. 19, no. 4, 2017, pp 1-11. https://doi.org/10.9714/PSAC.2017.19.4.001
  10. O. Hyun, "Prospect of Development and Utilization of Hybrid Superconducting Fault Current Limiters," J. of the Korea Institute of Applied Superconductivity and Cryogenics, vol. 9, no. 2, 2007, pp 14-18.
  11. O. Hyun, "Development Superconducting Fault Current Limiters," J. of the Korea Institute of Applied Superconductivity and Cryogenics, vol. 13, no. 2, 2011, pp 7-10.
  12. H. Kim, "Development of the 154 kV Superconducting Fault Current Limiters," J. of Electrical World, Special Issues 2, 2015, pp. 19-25.