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Experimental Investigation of the Breakdown Voltage of CO2, N2, and SF6 Gases, and CO2–SF6 and N2–SF6 Mixtures under Different Voltage Waveforms

descriptionPublicationkeyboard_double_arrow_right Article , Conference object , Journal , Other literature type 12 Apr 2018Publisher:MDPI AGJournal:Energies, volume 11, page 902 (eissn: 1996-1073,

Authors: Abderrahmane Beroual; Usama Khaled; Mamadou-Lamine Coulibaly;

doi: 10.3390/en11040902

Experimental Investigation of the Breakdown Voltage of CO2, N2, and SF6 Gases, and CO2–SF6 and N2–SF6 Mixtures under Different Voltage Waveforms

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Abstract

This paper is devoted to a comparison study of the breakdown voltage of CO2, N2, and SF6 gases, and CO2–SF6 and N2–SF6 mixtures under different voltage waveforms, namely AC, DC, and lightning impulse voltages, in point–plane and sphere–sphere electrode arrangements. The influence of pressure, voltage polarity, and percentage of SF6 in CO2 and N2 were studied, and equivalencies between the breakdown voltage of SF6 and those of the considered mixtures were analyzed. It is shown that the breakdown voltage of SF6 is the highest, whatever the applied voltage waveforms. Similarly, for a given voltage waveform, the breakdown voltage of SF6 is the highest. The AC breakdown voltage is the lowest for all gases. The addition of small amounts of SF6 to CO2 and N2 significantly improved the breakdown voltages of both natural gases. For a given breakdown voltage, the ratio between the pressure of CO2 to that of SF6 was generally lower than the pressure of N2 to SF6, whatever the voltage waveforms.

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Keywords

sulfur hexafluoride, Technology, DC, nitrogen, breakdown voltage, gas pressure, nitrogen; carbon dioxide; sulfur hexafluoride; SF<sub>6</sub> gas mixtures; breakdown voltage; DC; AC; lightning impulse voltage; gas pressure; polarity, polarity, T, carbon dioxide, AC, SF6 gas mixtures, lightning impulse voltage

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