Junil Kim, Onyou Lee, Young Kyu Mo, Seungmin Bang, Jong O Kang, Hongseok Lee, Seokho Nam, Hyoungku Kang
언어
영어(ENG)
URL
https://www.earticle.net/Article/A255255
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※ 학술발표대회집, 워크숍 자료집 중 4페이지 이내 논문은 '요약'만 제공되는 경우가 있으니, 구매 전에 간행물명, 페이지 수 확인 부탁 드립니다.
4,000원
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초록
영어
A liquid nitrogen (LN2) is usually used to be a coolant and insulant for a HTS coil system. HTS wires for a superconducting apparatus may be surrounded by gaseous nitrogen (GN2) due to film boiling generated by a quench or voids occurred by electrical breakdown. The increased maximum electric field intensity at GN2 may result in the degradation of dielectric strength of a HTS coil system. In this paper, a study on the dielectric characteristics of a composite insulation system composed of LN2 and GN2 is performed. A sphere-to-plane electrode system made with stainless steel is used to perform the experiments under AC and lightning impulse voltage condition. A sphere electrode is surrounded by GN2 and a plane electrode is immersed into LN2 to conduct dielectric experiments with a composite insulation system. The dielectric experiments are performed according to the level of LN2 from the plane electrode to a sphere electrode. It is found that the dielectric characteristics of a composite insulation system are dependent on the level of LN2 and the field utilization factor of an electrode system.
Junil Kim [ Department of Electrical Engineering, Korea National University of Transportation, 50 Daehak-ro, Republic of Korea ]
Onyou Lee [ Department of Electrical Engineering, Korea National University of Transportation, 50 Daehak-ro, Republic of Korea ]
Young Kyu Mo [ Department of Electrical Engineering, Korea National University of Transportation, 50 Daehak-ro, Republic of Korea ]
Seungmin Bang [ Department of Electrical Engineering, Korea National University of Transportation, 50 Daehak-ro, Republic of Korea ]
Jong O Kang [ Department of Electrical Engineering, Korea National University of Transportation, 50 Daehak-ro, Republic of Korea ]
Hongseok Lee [ Department of Electrical Engineering, Korea National University of Transportation, 50 Daehak-ro, Republic of Korea ]
Seokho Nam [ Department of Electrical Engineering, Applied Superconductivity Lab, Yonsei University, Seoul, Republic of Korea ]
Hyoungku Kang [ Department of Electrical Engineering, Korea National University of Transportation, 50 Daehak-ro, Republic of Korea ]
Corresponding author