Research on Liquefaction Characteristics of SF6 Substitute Gases

Zhikang Yuan; Youping Tu; Cong Wang; Sichen Qin; Geng Chen

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자료유형: 학술저널

저자정보: Zhikang Yuan (North China Electric Power University) Youping Tu (North China Electric Power University) Cong Wang (North China Electric Power University) Sichen Qin (North China Electric Power University) Geng Chen (North China Electric Power University)

저널정보: 대한전기학회 Journal of Electrical Engineering & Technology Journal of Electrical Engineering & Technology Vol.13 No.6

발행연도: 2018.11

수록면: 2,545 - 2,552 (8page)

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SF₆ has been widely used in high voltage power equipment, such as gas insulated switchgear (GIS) and gas insulated transmission line (GIL), because of its excellent insulation and arc extinguishing performance. However, SF₆ faces two environmental problems: greenhouse effect and high liquefaction temperature. Therefore, to find the SF₆ substitute gases has become a research hotspot in recent years. In this paper, the liquefaction characteristics of SF₆ substitute gases were studied. Peng–Robinson equation of state with the van der Waals mixing rule (PR-vdW model) was used to calculate the dew point temperature of the binary gas mixtures, with SF₆, C₃F₈, c-C₄F₈, CF₃I or C₄F₇N as the insulating gas and N₂ or CO₂ as the buffer gas. The sequence of the dew point temperatures of the binary gas mixtures under the same pressure and composition ratio was obtained. SF₆/N₂ ＜ SF₆/CO₂ ＜ C₃F₈/N₂ ＜ C₃F₈/CO₂ ＜ CF₃I/N₂ ＜ CF₃I/CO₂ ＜ c-C₄F₈/N₂ ＜ C₄F₇N/N₂ ＜ c-C₄F₈/CO₂ ＜C₄F₇N/CO₂. SF₆/N₂ gas mixture showed the best temperature adaptability and C₄F₇N/CO₂ gas mixture showed the worst temperature adaptability. Furthermore, the dew point temperatures of the SF₆ substitute gases at different pressures and the upper limits of the insulating gas mole fraction at -30℃, -20℃ and -10℃ were obtained. The results would supply sufficient data support for GIS/GIL operators and researchers.

#SF₆ substitute gases #GIS and GIL #Peng-Robinson equation of state #van der Waals mixing rule #dew point temperature

참고문헌 (27)

참고문헌 신청

R. Watson, “Common themes for ecologists in global issues,” Journal of Applied Ecology, vol. 36, no. 1, pp. 1-10, 1999. J. Devins, “Replacement gases of SF6,” IEEE Transactions on Electrical Insulation, vol. 15, no. 2, pp. 81-86, 1980. L. Christophorou, J. Olthoff, R. Brunt, “Sulfur hexafluoride and the electric power industry,” IEEE Electrical Insulation Magazine, vol. 13, no. 5, pp. 20-24, 1997. N. Malik, A. Qureshi. “A review of electrical breakdown in mixtures of SF6 and other gases,” IEEE Transactions on Electrical Insulation, vol. 14, no. 1, pp. 1-13, 1979. D. Xiao, “Development prospect of gas insulation based on environmental protection,” High Voltage Engineering, vol. 42, no. 4, pp. 1035-1046, 2016.

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