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<p>This study investigates the electro-thermal distortion characteristics of broken-strand conductors under DC ice-melting condition by establishing an electromagnetic-thermodynamic coupling model and solving it via the finite volume method. The results reveal that breakage of aluminum strands in transmission conductors causes significant distortions in the axial and radial electric fields, electromagnetic losses, and temperature fields at the broken strand location. The electromagnetic losses at the broken site are approximately 4.7 times the average of the intact region, and the distortion severity increases with damage severity and current excitation. Axial temperature decays rapidly within 10&#xa0;cm on either side of the damage center and stabilizes at distances beyond 20&#xa0;cm. These findings provide a theoretical basis for the safe operation of iced transmission lines.</p>

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Research on Electro-Thermal Distortion Characteristics of Broken Strand Conductor Under DC ice-Melting Condition

  • 期刊论文

  • 发表日期：

    2026年8月4日

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  • He Zhu,
  • Zhidong Gao,
  • Jiahao Zhou,
  • Sichuang Liu,
  • Xinyang Li,
  • Guoqian Liu,
  • Sicheng Cheng,
  • Jixin Guo

摘要

This study investigates the electro-thermal distortion characteristics of broken-strand conductors under DC ice-melting condition by establishing an electromagnetic-thermodynamic coupling model and solving it via the finite volume method. The results reveal that breakage of aluminum strands in transmission conductors causes significant distortions in the axial and radial electric fields, electromagnetic losses, and temperature fields at the broken strand location. The electromagnetic losses at the broken site are approximately 4.7 times the average of the intact region, and the distortion severity increases with damage severity and current excitation. Axial temperature decays rapidly within 10 cm on either side of the damage center and stabilizes at distances beyond 20 cm. These findings provide a theoretical basis for the safe operation of iced transmission lines.