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DC electric field support insulator dielectric gas-solid interface charge accumulation triggered along the surface of the flashover failure is the current high-voltage gas insulation equipment development of the key issues. And dielectric dielectric due to its high resistivity and excellent temperature stability, in the electric field - temperature gradient joint action can still be stable long-term operation. In this paper, we consider to build a simulation model of dielectric-dielectric gas-solid interface charge accumulation under the joint action of electric field-temperature gradient, analyze the influence of room temperature and temperature gradient on the accumulation characteristics of alumina dielectric SF6 gas-solid interface charge under DC electric field, and verify the validity of the simulation model by combining with the actual measurement results. The results show that alumina dielectrics have better gas-solid interface charge accumulation characteristics than epoxy resins under combined electric-thermal stress, and can replace epoxy resins as the pillar insulating materials in high-voltage gas insulating equipment.

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Numerical Calculation on Alumina-SF6 Interface Under Different Electrical-Thermal Stress

  • 会议论文

  • 发表日期：

    2026年

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  • Jinyin Zhang,
  • Shangchen Yun,
  • Xiaoxing Wei,
  • Yinjun Shi,
  • Xiao Yang

摘要

DC electric field support insulator dielectric gas-solid interface charge accumulation triggered along the surface of the flashover failure is the current high-voltage gas insulation equipment development of the key issues. And dielectric dielectric due to its high resistivity and excellent temperature stability, in the electric field - temperature gradient joint action can still be stable long-term operation. In this paper, we consider to build a simulation model of dielectric-dielectric gas-solid interface charge accumulation under the joint action of electric field-temperature gradient, analyze the influence of room temperature and temperature gradient on the accumulation characteristics of alumina dielectric SF6 gas-solid interface charge under DC electric field, and verify the validity of the simulation model by combining with the actual measurement results. The results show that alumina dielectrics have better gas-solid interface charge accumulation characteristics than epoxy resins under combined electric-thermal stress, and can replace epoxy resins as the pillar insulating materials in high-voltage gas insulating equipment.