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Ice-melting with DC is one of the means of effective defense for power grid to deal with ice disaster. Aiming at the problem of low precision caused by ignoring the dynamic characteristics of temperature in the existing ice-melting model, the heat balance equation based on three stages of DC ice-melting physical process was constructed in this paper, and the finite element method and the finite difference method were adopted to obtain the time domain curves of temperature. In addition, the corresponding ice-melting tests were carried out in the artificial climate chamber, and the temperature calculation model proposed in this paper was verified by real-time measurement of the ice surface temperature, the upper and lower surface temperatures of the conductor and the ambient temperature. The results showed that the average relative error of ice surface temperature is less than 10%, and the average correlation coefficients between the measured and simulated values of the upper and lower surface temperatures of the conductor are 0.78 and 0.86, respectively.

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Study on Time Domain Temperature Variation Characteristics of Iced Conductors in DC Ice-Melting Process

  • 会议论文

  • 发表日期：

    2025年

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  • Lei Xia,
  • Zhijin Zhang,
  • Ran Li,
  • Yongfu Li,
  • Fei Huang,
  • Xiping Jiang

摘要

Ice-melting with DC is one of the means of effective defense for power grid to deal with ice disaster. Aiming at the problem of low precision caused by ignoring the dynamic characteristics of temperature in the existing ice-melting model, the heat balance equation based on three stages of DC ice-melting physical process was constructed in this paper, and the finite element method and the finite difference method were adopted to obtain the time domain curves of temperature. In addition, the corresponding ice-melting tests were carried out in the artificial climate chamber, and the temperature calculation model proposed in this paper was verified by real-time measurement of the ice surface temperature, the upper and lower surface temperatures of the conductor and the ambient temperature. The results showed that the average relative error of ice surface temperature is less than 10%, and the average correlation coefficients between the measured and simulated values of the upper and lower surface temperatures of the conductor are 0.78 and 0.86, respectively.