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With global environmental regulations restricting the strong greenhouse gas SF6, the power industry urgently needs to develop low-carbon insulation medium replacement technologies. However, in ultra-high voltage and large capacity switchgear, the high temperature arc and enormous energy caused by extreme short-circuit currents pose strict requirements for the insulation performance of insulating gases. Traditional environmentally friendly gases have problems such as insufficient arc control capability and slow medium recovery. To this end, this article conducts numerical simulations using a three-dimensional MHD model. For high-current operating conditions, using a transverse magnetic electrode structure as the carrier, under the influence of a transverse magnetic field, the three-dimensional MHD model explores the impact of different SF₆/N₂ mixing ratios on the arc control capability of the electrode. It provides theoretical support for designing a new generation of circuit breakers under high current conditions, considering environmental protection and reliability under extreme conditions.

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Research on Arc Control Performance of Transverse Magnetic Electrode Under Different Gas Mixing Ratios

  • 会议论文

  • 发表日期：

    2026年

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  • Xuebin Qu,
  • Hua Chen,
  • Yong Yu,
  • Dawei Huo,
  • Zhen Liu,
  • Qiran Li,
  • Zhenyu Yue,
  • Wei Dang

摘要

With global environmental regulations restricting the strong greenhouse gas SF6, the power industry urgently needs to develop low-carbon insulation medium replacement technologies. However, in ultra-high voltage and large capacity switchgear, the high temperature arc and enormous energy caused by extreme short-circuit currents pose strict requirements for the insulation performance of insulating gases. Traditional environmentally friendly gases have problems such as insufficient arc control capability and slow medium recovery. To this end, this article conducts numerical simulations using a three-dimensional MHD model. For high-current operating conditions, using a transverse magnetic electrode structure as the carrier, under the influence of a transverse magnetic field, the three-dimensional MHD model explores the impact of different SF₆/N₂ mixing ratios on the arc control capability of the electrode. It provides theoretical support for designing a new generation of circuit breakers under high current conditions, considering environmental protection and reliability under extreme conditions.