Browse > Article

SLI, AC Breakdown Voltage Characteristics of $SF_6/CF_4$ Mixtures Gas in Nonuniform Field  

Hwang, Cheong-Ho (인하대 전기학과)
Sung, Heo-Gyung (인하대 전기공학과)
Huh, Chang-Su (인하대 전기공학과)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.57, no.2, 2008 , pp. 245-251 More about this Journal
Abstract
Although many studies have been carried out about binary gas mixtures with $SF_6$, few studies were presented about breakdown characteristics of $SF_6/CF_4$ mixtures. At present study the breakdown characteristics of $SF_6/CF_4$ mixtures in non-uniform field was performed. The experiments were carried out under AC voltage and standard lightning impulse(SLI) voltage. Breakdown characteristics were investigated for $SF_6/CF_4$ mixtures when AC voltages and standard lighting impulse voltage was applied in a needle-plane. The needle-plane electrode whose gap distance was 3 mm were used in a test chamber. $SF_6/CF_4$ mixtures contained from 0 to 100% $SF_6$ and the experimental gas pressure ranged from 0.1 to 0.5 MPa. The breakdown characteristics of $SF_6/CF_4$ mixtures in non-uniform field may be influenced by defects like needle-shaped protrusions. In case of slowly rising SLI voltage and AC voltage it is enhanced by corona-stabilization. This phenomena caused by the ion drift during streamer development and the resulting space-charge is investigated. In non-uniform field under negative SLI voltage the breakdown voltage was increase linearly but under positive SLI voltage the breakdown voltage increase non-linearly. The breakdown voltage in needle-plane electrode displayed N shape characteristics for increasing the content of $SF_6$ at AC voltage. $SF_6/CF_4$ mixture has good dielectric strength and arc-extinguishing properties than pure SF6. This paper presents experimental results on breakdown characteristics for various mixtures of $SF_6/CF_4$ at practical pressures. We could make an environment friendly gas insulation material with maintaining dielectric strength by combing $SF_6\;and\;CF_4$ which generates a lower lever of the global warming effect.
Keywords
Breakdown; AC Voltage; standard lightning impulse voltage; $SF_6$; $CF_4$;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
Times Cited By SCOPUS : 0
연도 인용수 순위
1 Y. Qiu, Y. P. Feng, "Investigation of SF6-N2, SF6-CO2 and SF6-air as substitutes for SF6 insulation", IEEE International Symposium on Electrical Insulation, Vol.2, p. 766, 1996
2 D. Kind and K. Feser, "High-voltage test techniques", Newnes, p. 14. 2001
3 서상현, 유회영, 김상남, 하성철, "$SF_6$ 가스의 전리 및 부착계수에 관한 연구", 조명 전기설비학회지 Vol.10, No.6, p. 622, 1996
4 W. Ziomek and E. Kuffel, "Breakdown and prebreakdown characteristics of SF6/CF4 mixtures in non-uniform electric field", High Voltage Engineering, Eleventh International Sysposium on Conf. Vol.3, No. 467, p.243, 1999
5 M. Zou and J. P. Reynders, "Synergy between SF6 and other gases to enhance dielectric strength", 10th International Symposium on High Voltage Engineering, p.251, 1997
6 V. N. Maller and M. S. Naidu, "Advances in High Voltage Insulation And Arc Interruption in $SF_6$ And Vacuum", Pergamon press, pp.1-11, 1981
7 T. Nitta, N. Yamada, Y. Fujiwara, "Area effect of electrical breakdown in compressed $SF_6$", IEEE Transactions on Power Apparatus and Systems, Volume PAS-93, Issue. 2, p.625, 1974
8 G. J. Cliteur, Y. Hayashi, E. Haginomori, K.Suzuki, "Calculation of the uniform breakdown field strength of $SF_6$ Gas", IEEE Transactions on Dielectrics and Electrical Insulation, Vol.5, No. 6, p.847, 1998
9 송병두, 하성철, "볼츠만 방정식에 의한 $CF_4$ 분자 가스의 전자이동속도특성에 관한 연구", 전기전자재료학회논문지, Vol.17, No.11, p.1252, November 2004
10 M. L. Trudeau, M. F. Frechette and R. Y. Laroque, " Sparks in SF6 and SF6/CF4 Atmospheres : impact on metallic and insulating surfaces". conference Record of the IEEE International Symposium on Electrical Insulation, Montreal, Quebec, Canada, June 16-19, 1996
11 J. Berg, E. Kuffel, "Breakdown voltage characteristics of SF6/CF4 mixtures in uniform and non-uniform field gaps", Electrical Insulation and Dielectric Phenomena, Annual Report., Conf, p. 126 - 129, 1995
12 황청호, 박신우, 김남렬, 허창수. "평등전계에서 SF6/CF4 혼합 가스의 AC 절연내력 특성", 한국전기전자재료학회지, vol. 20, No.4, p. 381, April 2007   과학기술학회마을   DOI
13 서호준, 이동희, "$SF_6계$ 혼합 가스의 뇌임펄스 절연파괴 특성", 전기전자재료학회, Vol.18, No.7, p.667, 2005   과학기술학회마을   DOI