基于有限元法的架空线路温度计算与仿真分析

A Study on the Temperature Calculation and Simulation Analysis of the Overhead Line Based on the Finite Element Method

提出了一种有限元法求解输电线路温度分布的方法,建立了输电线路温度场数学模型和铜导线输电线路有限元模型。通过ANSYS有限元软件仿真得出不同载流量条件下,输电线路温度场的分布情况。仿真结果表明,导线通入电流越大,导线的径向温度温差增大,环境温度变化与导线外表面的温度变化规律近似为线性关系。该方法可以预测输电线路最大承受的载荷量,为实现输电线路动态增容提供了理论依据。

This paper proposes a finite element method to solve the temperature distribution of the transmission line.A mathematical model of the temperature field of the transmission line and a finite element model of the cooper conductor transmission line are established.The distribution of the temperature field of the transmission line in different carrier current conditions is obtained by the ANSYS finite element software simulation.The simulation results show that the larger the current is,the larger the radial temperature difference of the conductor is,and the variation of the ambient temperature and the temperature variation of the outer surface of the conductor are in a approximate linear relationship.This method can predict the maximum load capacity of the transmission line and provide a theoretical basis for dynamic capacity increase of it.