架空输电线路覆冰不平衡张力影响因素研究

Affecting Factors of Icing Unbalance Tension of Overhead Transmission Lines

覆冰不平衡张力是导致直线塔倒塔和损坏的主要原因之一,如何提高杆塔抵抗覆冰不平衡张力的能力是设计人员必须关注的问题.结合架空输电线路的地形、覆冰特点,从耐张段的连续档数量、档距大小及不均匀性、挂点高差、断面模型、悬垂串等多方面,对影响覆冰不平衡张力的相关因素进行了详细的计算分析论证,结论用于指导杆塔排位优化,同时作为杆塔结构设计的依据之一,全面提高重覆冰区线路的抗冰能力.

Icing unbalance tension,one of the main causes of collapse and damage of towers,is of main concern to designers to find ways to improve the ability of combating the icing unbalance tension. Combined with the topography,ice coating characteristics of overhead transmission lines,and from the perspectives of the number ofspans in the tension segments,the length and non-uniformity of spans,the hanging point elevation,the section model,the suspension insulator,the paper conducts a detailed analysis and verification of the relative factors in this regard. The conclusion can be used to guide the tower arranging optimization,and used as one of the tower structure design basis,thereby improving the ability of transmission lines to resist ice coating in heavy icing areas.