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[국내논문] Analysis on the electrical degradation characteristics of 2G HTS wires with respect to the electrical breakdown voltages 원문보기

Progress in superconductivity and cryogenics : PSAC, v.17 no.3, 2015년, pp.37 - 40  

Kang, Jong O (Department of Electrical Engineering, Korea national University of Transportation) ,  Lee, Onyou (Department of Electrical Engineering, Korea national University of Transportation) ,  Mo, Young Kyu (Department of Electrical Engineering, Korea national University of Transportation) ,  Kim, Junil (Department of Electrical Engineering, Korea national University of Transportation) ,  Bang, Seungmin (Department of Electrical Engineering, Korea national University of Transportation) ,  Lee, Hongseok (Department of Electrical Engineering, Korea national University of Transportation) ,  Lee, Jae-Hun (SuNAM Co., Ltd.) ,  Jang, Cheolyeong (SuNAM Co., Ltd.) ,  Kang, Hyoungku (Department of Electrical Engineering, Korea national University of Transportation)

Abstract ▼ AI-Helper 아이콘AI-Helper

Recently, the electrical insulation design for electrical apparatuses is important to cope with the tendency of high voltage. The degradation characteristics of a superconducting coil due to an electrical breakdown should be considered to design a high voltage superconducting coil. In this paper, th...

주제어

#degradation characteristics   #critical current   #electrical breakdown   #index number   #stabilizer   #2G HTS wire  

AI 본문요약
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제안 방법

  • All experiments are performed in liquid nitrogen to verify the degradation characteristics of 2G HTS wires with respect to AC and DC electrical breakdown tests. The electrical breakdown voltages applied to the 2G HTS wires are 50, 70, and 100kV, with AC and DC voltage.
  • This paper deals with the degradation characteristics of 2G HTS wires with respect to an electrical breakdown, to establish a fundamental database for designing high voltage superconducting systems. In this study, three kinds of 2G HTS wires which have stainless steel(STS), brass and copper stabilizer are prepared to verify the degradation effect of 2G HTS wires according to the stabilizer material. The degradation characteristics of 2G HTS wires, such as Ic and index number are measured by performing electrical breakdown tests.
  • Thus, the superconducting coil must consider an unexpected dielectric breakdown accident for developing the superconducting apparatuses [1, 2]. This paper deals with the degradation characteristics of 2G HTS wires with respect to an electrical breakdown, to establish a fundamental database for designing high voltage superconducting systems. In this study, three kinds of 2G HTS wires which have stainless steel(STS), brass and copper stabilizer are prepared to verify the degradation effect of 2G HTS wires according to the stabilizer material.
  • It is concluded that the degradation characteristics of 2G HTS wires are affected by the magnitude of applied voltage and stabilizer material. To investigate relationship between degradation characteristics and micro-structure of 2G HTS wires, the cross-sectional view of 2G HTS wires is observed by using a SEM.

대상 데이터

  • The electrical characteristics such as Ic and index number of 2G HTS wires are measured by using a four probe method with a 1µV/cm criterion in saturated liquid nitrogen at a temperature of 77K [3]. To analyze the degradation characteristics according to electrical breakdown, the three kinds of 2G HTS wires manufactured by SuNAM Company Limited are used in this study. The specimens of 2G HTS wires are composed with different stabilizer materials respectively.
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참고문헌 (4)

  1. I. Sauers, "High voltage studies of dielectric materials for HTS power equipment," IEEE Trans. Appl. Supercond., vol. 9, no. 6, pp 922-931, 2002. 

  2. Jeong Il Heo, Jonggi Hong, Seokho Nam, Seyong Choi, and Hyoungku Kang, "Design of Current Leads for a High Voltage Superconducting Apparatus," IEEE Trans. Appl. Supercond., vol. 23, Article #. 4800805, 2013. 

    상세보기

  3. Y. Iwasa, Case Study on Superconducting Magnets: Design and Operational Issues, Plenum Press, pp. 306-307, 1994 

  4. Jong O Kang, Onyou Lee, Seungmin Bang, Junil Kim, Hongseok Lee, Jonggi Hong, Seokho Nam, and Hyoungku Kang, "Degradation Characteristics of Superconducting Wires according to with respect to Electrical Breakdown Tests," IEEE Trans. Appl. Supercond., vol. 25, No.3, Article #. 8800804, 2015. 

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