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Progress in superconductivity v.13 no.3, 2012년, pp.189 - 194  
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

고전압 초전도코일 개발을 위한 이용률에 따른 $SF_6$가스의 절연특성에 관한 연구
Analysis on the Dielectric Characteristics of $SF_6$ Gas for Developing a High Voltage Superconducting Coil

남석호    (Korea National University of Transportation   ); 홍종기    (Korea National University of Transportation   ); 허정일    (Korea National University of Transportation   ); 강형구    (Korea National University of Transportation  );
  • 초록

    Studies on the development of high voltage superconducting apparatuses, such as transmission superconducting fault current limiters (SFCLs) and superconducting cables, have been performed worldwide. In this paper, a study on the electrical insulation characteristics of electro negative gas according to various pressures and utilization factors was conducted as a part of developing a high voltage superconducting coil with a sub-cooled nitrogen cooling system. Some gases such as helium (He), nitrogen ( $N_2$ ), and sulfur hexafluoride ( $SF_6$ ) are considered for pressurizing the sub-cooled nitrogen cooling system of high voltage SFCLs and superconducting cables. $SF_6$ is used to pressurize and enhance the dielectric performance of a superconducting system of a sub-cooled nitrogen cooling system for superconducting cables being developed in the Republic of Korea. In this paper, dielectric experiments on AC voltage, as well as lightning impulse voltage of $SF_6$ , are conducted according to various utilization factors by using several kinds of sphere-to-plane electrode systems. As results, it is known that the empirical formulae of $SF_6$ , known as an electro negative gas, are derived according to various pressures and utilization factors. Also, the appropriate pressure condition for designing a high voltage superconducting coil is found from the viewpoint of dielectric performance.


  • 주제어

    dielectric experiments .   electro negative gas .   insulation characteristics .   utilization factors.  

  • 참고문헌 (7)

    1. Hyoungku Kang, Min Cheol Ahn, Yong Ku Kim, Duck Kweon Bae, Yong Soo Yoon, Tae Kuk Ko, Jung Ho Kim, and Jinho Joo, "Design, Fabrication and Testing of Superconducting DC Reactor for 1.2 kV/80 A Inductive Fault Current Limiter", IEEE Trans. on Applied Superconductivity, vol. 13, no. 2, pp. 2008- 2011, June 2003. 
    2. Hyoungku Kang, Chanjoo Lee, Kwanwoo Nam, Yong Soo Yoon, Ho-Myung Chang, Tae Kuk Ko, and Bok-Yeol Seok, "Development of a 13.2 kV/630 A (8.3 MVA) High Temperature Superconducting Fault Current Limiter", IEEE Trans. on Applied Superconductivity, vol. 18, no. 2, pp. 628-631, June 2008. 
    3. Kim, H.J.; Kwag, D.S.; Kim, S.H.; Cho, J.W.; Seong, K.C.; "Electrical Insulation Design and Experimental Results of a High-Temperature Superconducting Cable", IEEE Trans. on Applied Superconductivity, vol. 17, no. 2, pp. 1743-1747, June 2007. 
    4. Hyoungku Kang, Chanjoo Lee, Tae Kuk Ko, and Bok-Yeol Seok, "Electrical Breakdown Characteristics of Superconducting Magnet System in Sub-Cooled Liquid Nitrogen", IEEE Trans. on Applied Superconductivity, vol. 17, no. 2, pp. 1509-1512, June 2007. 
    5. S.H. Lee, W.J. Shin, Umer A. Khan, S.H. Oh, J.K. Seong, B.W. Lee, "Design and installation of extra high voltage cryogenic dielectric test facilities for the superconducting electric equipment", Physica C, In Press, 2011. 
    6. Yeon Suk Choi, Ho-Myung Chang, and Steven W. Van Sciver, "Performance of extended surface from a cryocooler for subcooling liquid nitrogen by natural convection", Cryogenics, vol. 46, pp. 396-402, 2006. 
    7. H. Kang, T.K. Ko, "Experimental Study on the Dielectric Characteristics of Gaseous Insulation Medium according to Temperature and Pressure", International Symposium on Superconductivity, SAP73, 2010. 

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