变电站软母线下料长度二分法数值计算模型

针对变电站软母线的下料长度问题,提出一种二分法的数值求解模型.首先在假设水平应力已知的条件下,由受力分析建立软母线下料长度的非线性耦合解析模型,进而设计变电站软母线下料长度二分法数值计算模型,并利用二分法得到精确的数值解.仿真与应用结果表明,数值计算模型能够得到非常准确的下料长度,安装后的软导线总弧垂误差均在-2%~+3%以内,具有良好的施工效果.

The dichotomy numerical calculation model of soft-bus conductor length in transformer substation

The soft-bus conductor in transformer substation is a kind of short-distance overhead lines, and its cutting length is directly affected by length and weight of the tension insulator string. Under the assumption of that the horizontal stress is known, this article establishes a nonlinear coupling analytical model of soft-bus conductor length through stress analysis. Furthermore, it designs a numerical calculation of soft-bus conductor length in transformer substation. Given the sag, the numerical calculation consists of five modules, namely the dichotomy adjustment of sag step, the horizontal stress calculation and adjustment, the projection length calculation, the adjustment for calculation error of total sag, and the calculation of soft-bus conductor length. Then the numerical calculation obtains accurate numerical solution through dichotomy. It is demonstrated by the result of simulation and application that an accurate soft-bus conductor length can be worked out through the numerical calculation method. Besides, the total sag error of soft wire after installation is between -2% to 3% so that the construction effect will be satisfactory.