大跨越分裂导线的静力求解

STATIC ANALISYS AND COMPUTATION OF LONG-SPAN MULTI-CONDUCTOR TRANSMISSION LINES

大跨越分裂导线静平衡构形和张力分布的准确计算 ,对于线路设计、导线结构的动特性分析以及舞动分析计算都是很重要的。对于多档连续导线 ,由于档间张力的传递和悬挂防舞器等重物产生集中载荷 ,使得对这种导线结构的静力分析计算产生困难 ,还未见有比较准确、有效的分析方法。该文采用无抗弯导线段的静态控制分方程 ,分别对于集中载荷和有集中载荷的情况 ,得到了多档导线静态构形和张力的解析计算公式 ,给出了相应的计算步骤。计算实例表明该文的方法可信有效。所得结果既可用于大跨越分裂导线、也可推广用于一般线路的静态设计分析。

The static configuration and tension distribution analysis of conductor of overh ead transmission lines are important for the line design,dynamic behavior determ ination and galloping prediction.It is difficult to comput the static configurat ion and tension for a long multi-span transmission line with galloping control devices are attached,because the tension distributions are not continuous and tr ansferred between the spans in this cased.There are no effective static analysis methods for such conductor structures.In this paper,a set of governing differen tial equations for the conductor static analysis is developed with the bending s tiffness effects to be neglected.The analytical solutions of the equations are o btained and the corresponding computational schemes are suggested.The catenary c onfiguration and tension of the conductor can be calculated by using these formu las and schemes.Numerical computations for a real transmission line which evalua tes the efficiencies of the methods of this paper is given.The results show that the methods obtained in this paper are effective.