基于时间序列迭代的输电线路覆冰厚度估计方法

An Estimation Method for Icing Thickness of Transmission Line Based on Time Series Iteration

摘要:

冰灾严重影响输电线路的安全运行，会造成巨大的经济损失。当覆冰产生后，输电线路的弧垂最低点有可能产生位置变化，杆塔拉力传感器所承受的导线长度也会随之变化。文中提出一种基于时间序列迭代的输电线路覆冰厚度估计方法，通过多次迭代计算覆冰与线路等效厚度与密度，以减小弧垂最低点位置变化对覆冰厚度测量的影响。在承受导线长度持续增加、先增加后减少、持续减少、先减少后增加的4种仿真实验情景中，所提出的覆冰厚度估计方法的准确性及科学性均得到了验证。

Abstract:

Ice disaster seriously affects the safe operation of transmission lines and causes huge economic losses. When the icing occurs, the position of the lowest sag of transmission line may change, and the length of the wire borne by tower tension sensor varies accordingly. An estimation method for icing thickness of transmission lines based on time series iteration method is proposed. The equivalent thickness and density of icing and line are calculated by several iterations to reduce the influence of the changes of the position of the lowest sag on the icing thickness measurement. The accuracy and scientificity of the proposed estimation method are verified in four simulation experiment scenarios, in which the length of the subjected wire continues to increase, firstly increases and then decreases, continuously decreases, and firstly decreases and then increases.