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In case of three-phase short circuit situation in power transformers, the winding will be subjected to a great short-circuit electromotive force impact due to the instantaneous rise of the current, which may cause serious deformation of the winding and other faults. A three-dimensional model of a power transformer was built in Maxwell software, and the transient electromagnetic field simulation analysis is carried out on the model, and the winding current and the axial and radial electromotive force distribution of the transformer during the three-phase short-circuit fault of the transformer are obtained. The results show that the axial force of the winding is greater at the ends than in the center, but the radial force is less at the ends than in the center. This study is helpful in improving the short circuit resistance of transformers.

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Study on the Evolutionary Properties of Transformer Spatial Electromagnetic Force Under Short-Circuit Condition

  • 会议论文

  • 发表日期：

    2026年

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  • Chuangye Zhao,
  • Haitao Yang,
  • Guocheng Ding,
  • Zhibin Nie

摘要

In case of three-phase short circuit situation in power transformers, the winding will be subjected to a great short-circuit electromotive force impact due to the instantaneous rise of the current, which may cause serious deformation of the winding and other faults. A three-dimensional model of a power transformer was built in Maxwell software, and the transient electromagnetic field simulation analysis is carried out on the model, and the winding current and the axial and radial electromotive force distribution of the transformer during the three-phase short-circuit fault of the transformer are obtained. The results show that the axial force of the winding is greater at the ends than in the center, but the radial force is less at the ends than in the center. This study is helpful in improving the short circuit resistance of transformers.