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The unique climatic environment in the western high-altitude regions leads to a substantial increase in the probability of insulation failures in power equipment. When power equipment experiences partial discharge, its internal insulation medium undergoes complex chemical reactions, producing specific decomposition gaseous products. Using gas sensors to analyze the gas composition inside the power equipment can enable real-time monitoring of whether an insulation fault has occurred within, thereby preventing further expansion of the insulation accident. To this end, based on the self-built air discharge test platform and gas analysis platform, this paper investigates the effects of pressure and humidity changes in high-altitude environments on the air discharge decomposition characteristics. Additionally, based on the experimental results, it elucidates the decomposition mechanism of air discharge in high-altitude environments, which has broad application prospects in the field of air discharge fault detection in power equipment.

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Breakdown Characteristics and Decomposition Mechanisms of Air-Insulation Mediums in High-Altitude Conditions

  • 会议论文

  • 发表日期：

    2025年

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  • Fan Sun,
  • Feng Jing,
  • Jiakun Wang,
  • Xizhe Li,
  • Zhaohui Zhai,
  • Xiao Liu,
  • Kanglu Li,
  • Jifeng Chu

摘要

The unique climatic environment in the western high-altitude regions leads to a substantial increase in the probability of insulation failures in power equipment. When power equipment experiences partial discharge, its internal insulation medium undergoes complex chemical reactions, producing specific decomposition gaseous products. Using gas sensors to analyze the gas composition inside the power equipment can enable real-time monitoring of whether an insulation fault has occurred within, thereby preventing further expansion of the insulation accident. To this end, based on the self-built air discharge test platform and gas analysis platform, this paper investigates the effects of pressure and humidity changes in high-altitude environments on the air discharge decomposition characteristics. Additionally, based on the experimental results, it elucidates the decomposition mechanism of air discharge in high-altitude environments, which has broad application prospects in the field of air discharge fault detection in power equipment.