防止导线覆冰临界电流的传热研究

摘要

对导线覆冰过程进行传热分析,建立了导线覆冰过程的热平衡方程,导出适合任何条件的导线表面温度表达式,提出防止导线覆冰临界电流的计算公式,表明临界电流的大小与风速、含湿量、气温、过冷却水滴直径及导线本身特性有关,为通过科学调度负荷实现预防导线覆冰提供了理论依据。%In this paper the heat transfer processes on conductor icing have been analyzed the heat balance equation has been set up the surface temperature relation which is suitable for any icing condition has been derived and the formula to calculate the current which is required to prevent wires from icing has been proposed. It shows that wind speed liquid water content air temperature diameter of the super cooled droplets and properties of the conductor may determine the current. It may provide a theoretical basis for preventing wires from icing by scientific load management.