重覆冰架空输电线路不平衡张力的精确计算方法

A Precise Calculation Method for Unbalanced Tension of Heavy Icing Overhead Transmission Line

摘要: 不均匀覆冰(或不均匀风)会使直线塔两侧出现不平衡张力，导致铁塔受到弯矩和扭矩或绝缘子串上拔，产生永久性事故。采用悬链线模型精确计算杆塔的不平衡张力，是重覆冰地区架空输电线路设计的基础。本文介绍了求解上述问题数值的精确计算方法，通过与规程对比，表明计算方法是正确的。

Abstract: Uneven ice accumulation (or differential wind) will produce some unbalanced tension on both sides of the straight line tower. Unbalanced tension can generate bending moment and torsion moment, and the suspension insulator string will bring about some turning up, which will bring permanent accident. Calculating the unbalanced tension accurately under the catenary model is the foundation of designing overhead transmission line in heavy icing area. This paper introduces a precise calculation method for unbalanced tension of heavy icing overhead transmission line, and the result shows that the method is very precise.