微气象条件下输电线路覆冰厚度预测方法

Prediction Method of Ice Thickness for Transmission Lines under Micro-Meteorological Conditions

摘要: 电网在长期露天运行过程中，输电线路极易遭受各种自然灾害，其中线路覆冰会引起覆冰区域周边大面积停电，甚至使当地电网崩溃，造成巨额经济损失。因此，对输电线路覆冰厚度预测方法进行了研究。通过获取第i时间段初始导线半径和第i时间段覆冰环境参数，计算第i时间段单位长度线路覆冰质量，再根据所述覆冰质量，计算第i时间段的覆冰厚度，从而获得覆冰总厚度。经过实例认证，该覆冰厚度的预测误差在5%以内，可以提高输电线路覆冰厚度测量的准确性，为输电线路的安全运行提供了保障。

Abstract: During the long-time open air operations, transmission lines in the power grid are vulnerable to various natural disasters. In particular, ice covered lines will cause large power outages around the icing area, even the collapse of the local power grid, resulting in huge economic losses. Therefore, the prediction method for icing thickness of transmission line is studied. By acquiring the icing environmental parameters in period I and the initial radius, the mass of coating ice per unit of transmission line is calculated, and then the total ice thickness in the whole line is obtained. Through the verification of real example, it is found that the prediction error of the ice thickness is less than 5%; it can improve the accuracy of ice thickness measurement of the transmission line and a guarantee for the safe operation of transmission lines.