改变步长的输电线路不平衡张力计算方法

Imbalanced Tension Calculation Method of Transmission Lines with Mending Steps

通过分析传统输电线路不平衡张力计算方法,得出第1档内应力和计算步长的选取影响计算收敛,传统方法难以保证快速收敛的同时实现高精度计算。提出一种改变步长的不平衡张力计算方法,研究了初值选取方法和步长变换方法,并给出了程序流程。在计算11种工作情况下,1个耐张段内的各档应力,传统方法和改变步长方法的计算结果相同,但是改变步长法计算效率大大提高。

According to the study of the traditional imbalanced tension calculation method for transmission lines,it is found that the first span inner stress and the step selection affects the convergence of calculation and it is hard for the traditional method to realize high accuracy calculation while rapid convergence is ensured.A new imbalanced tension calculation method with mending steps is proposed,and the methods for initial value selection and for mending steps are studied,and the program flow chart is presented.Under eleven operational conditions,the stresses of every span within a strain section calculated respectively with the traditional method and the mending step method are same but the calculation efficiency of the mending step method is improved greatly.