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352 / 2022-03-15 16:53:57
Molecule polarity analysis of C3F7CN-Epoxy interface based on surface electrostatic potential
gas insulation,surface,surface charge,GIL,SF6
4. High Voltage Insulation System: Air, Gas, Vacuum Dielectrics
摘要录用
陈 庚 / 华北电力大学
Xuanning Zhang / North China Electric Power University
Yanyu Liang / North China Electric Power University
shaocong wu / North China Electric Power University
Hao Xu / North China Electric Power University
幼萍 屠 / 华北电力大学
When C3F7CN gas is applied into DC gas insulation equipment, obvious hetero-polar charges will appear on the surface of the spacers, which may result in insulator surface flashover accident. The hetero-polar charge pattern formed by the migration of insulation gas micro discharge and partial discharge to the insulator surface is related to the molecular polarity of the gas-solid interface adsorption layer. Based on density functional theory (DFT), the surface electrostatic potential distribution of C3F7CN, CO2 gas and epoxy under DC electric field is calculated. The affinity polarity and ability of solid and gas single molecules are analyzed. The bimolecular model of the gas-solid interface layer between C3F7CN, CO2 gas and epoxy resin is established, the electrostatic potential distribution on the bimolecular surface under DC electric field strength is calculated, and the local polarity and electric affinity of the gas-solid interface bimolecular layer composed of different gases and epoxy resin are analyzed. It is found that under DC voltage, due to the relatively fixed binding site of C3F7CN and epoxy, the non-uniformity of electrostatic potential is stronger than that of symmetrical structural gases SF6, which has a strong attraction to carriers and promotes the formation of hetero-polar charge patterns on the surface of basin insulators. The results of this paper provide a theoretical basis for the development of eco-friendly gas insulation equipment.

 
重要日期

  • 会议日期

    09月25日

    2022

    至

    09月29日

    2022

  • 08月15日 2022

    提前注册日期

  • 09月10日 2022

    报告提交截止日期

  • 11月10日 2022

    注册截止日期

  • 11月30日 2022

    初稿截稿日期

  • 11月30日 2022

    终稿截稿日期

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IEEE DEIS
承办单位
Chongqing University
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