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The problem of charge accumulation on the surface of basin-type insulators under DC voltage is importantly related to the insulator structure. Most of the related simulation studies have not considered the micro discharge situation that often exists. In this paper, a micro discharge model of insulator surface is established, and the surface charge distribution of insulators with different inclination parameters is examined in the presence of micro discharge. The simulation results show that the micro discharge significantly affects the surface charge distribution, and the charge polarity is reversed near the discharge area, which is due to the enhancement of gas side conduction by the micro discharge. When the discharge is near the high voltage electrode, the larger the inclination angle is, the larger the maximum value of the surface charge density near the discharge area is, and the larger the range of changes in the accumulated charge compared with no discharge. When the discharge is far away from the high voltage electrode, the range of change is basically independent of the inclination angle. It is hoped that this study will contribute to the optimization of insulator structure.

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Effect of Inclined Structure of DC GIL Insulators on Surface Charge Under Micro Discharge Conditions

  • 会议论文

  • 发表日期：

    2026年

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  • Chengyan Han,
  • Junping Zhao,
  • Jinchu Chen,
  • Ming Yin,
  • Dongliang Liu,
  • Xiaoang Li

摘要

The problem of charge accumulation on the surface of basin-type insulators under DC voltage is importantly related to the insulator structure. Most of the related simulation studies have not considered the micro discharge situation that often exists. In this paper, a micro discharge model of insulator surface is established, and the surface charge distribution of insulators with different inclination parameters is examined in the presence of micro discharge. The simulation results show that the micro discharge significantly affects the surface charge distribution, and the charge polarity is reversed near the discharge area, which is due to the enhancement of gas side conduction by the micro discharge. When the discharge is near the high voltage electrode, the larger the inclination angle is, the larger the maximum value of the surface charge density near the discharge area is, and the larger the range of changes in the accumulated charge compared with no discharge. When the discharge is far away from the high voltage electrode, the range of change is basically independent of the inclination angle. It is hoped that this study will contribute to the optimization of insulator structure.