架空输电线路覆冰和融冰仿真研究

Simulation Research on Ice Coating and Ice Melting of Overhead Transmission Line

为了辅助运行人员在冬季不同气象条件下对输电线路的覆冰危害进行定量分析,以及合理选择直流融冰电流和融冰时间,对架空线路的覆冰和融冰仿真软件进行了研究,提出了一种便于使用的考虑导线所处微地形环境和风向等综合因素的覆冰增长计算方法,并分析了覆冰仿真软件程序框图;利用载流导线的热平衡方程,选择导线最高允许运行温度为70℃,计算了导线的最大融冰电流并对计算误差进行了分析;利用覆冰导线表面冰融化时的热平衡方程,分析了覆冰导线融冰时间的计算方法,并分析了融冰仿真软件的程序框图。

In order to assist operation personnel to make quantitative analysis on the hazard of ice coating for overhead transmission lines under different meteorological conditions in winter and to make rational selection of ice melting DC and time,this paper studies the simulating software for ice coating and ice melting of overhead transmission line,puts forward a user-friendly method for calculating the growth of coating ice on overhead transmission line taking the micro-topographic environment of the conducting wires and the direction of the wind into consideration,and analyzes the program diagram of ice coating simulation software,and by suing the heat balance equation and selecting 70 ℃ as the highest allowable operating temperature of the conducting wires,calculates the maximum ice melting current of the conducting wires and analyzes the miscalculations,and by using the heat balance equation for surface ice melting of the conducting wires coated by ices,analyzes the method for calculating the ice melting time of the conducting wires coated by ices,and also analyzes the program diagram of ice melting simulation software.