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<p>The vital application of high direct current (DC) de-icing technology is imperative for protecting transmission lines from ice-related disasters. This study, focusing on the LGJ-400/50 steel-cored aluminum stranded wire, comprehensively analyzes the mechanisms and characteristics of high DC de-icing. Utilizing Maxwell and Fluent for simulation, we investigate current density and temperature fields. Numerical calculation models for de-icing under various ice cover densities and finite element twisted conductor models are established and experimentally validated. Findings indicate that high-density ice layers significantly hinder internal heat conduction and dissipation, leading to heat accumulation within the steel core and a temperature rise. The ice cover’s thermal conductivity shows a positive correlation with ice cover density. With increasing thermal conductivity, the heat dissipation value on the ice layer surface expands, revealing a pronounced upward trend in the required de-icing time. Irregularly covered ice conductors exhibit a shorter de-icing time than uniformly covered ice.</p>

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The Impact of Ice Cover Density on the De-Icing Time of High Direct Current in Transmission Lines

  • 期刊论文

  • 发表日期：

    2025年7月14日

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  • Yang Feng,
  • Xia Lei,
  • Wang Xiangkun,
  • Wang Yao,
  • Feng Chongyang

摘要

The vital application of high direct current (DC) de-icing technology is imperative for protecting transmission lines from ice-related disasters. This study, focusing on the LGJ-400/50 steel-cored aluminum stranded wire, comprehensively analyzes the mechanisms and characteristics of high DC de-icing. Utilizing Maxwell and Fluent for simulation, we investigate current density and temperature fields. Numerical calculation models for de-icing under various ice cover densities and finite element twisted conductor models are established and experimentally validated. Findings indicate that high-density ice layers significantly hinder internal heat conduction and dissipation, leading to heat accumulation within the steel core and a temperature rise. The ice cover’s thermal conductivity shows a positive correlation with ice cover density. With increasing thermal conductivity, the heat dissipation value on the ice layer surface expands, revealing a pronounced upward trend in the required de-icing time. Irregularly covered ice conductors exhibit a shorter de-icing time than uniformly covered ice.