基于有限元仿真的架空导线径向温度场分析  

Analysis on Radial Temperature Field of Overhead Conductor Based on Finite Element Simulation

作　　者：刘志陆 李恒真 刘刚[2] 张鸣 谭劲章 LIU Zhilu;LI Hengzhen;LIU Gang;ZHANG Ming;TAN Jinzhang(Foshan Power Supply Bureau of Guangdong Power Grid Corporation Limited,Foshan 528000,China;School of Electric Power Engineering,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]广东电网有限责任公司佛山供电局,广东佛山528000 [2]华南理工大学电力学院,广东广州510640

出　　处：《绝缘材料》2021年第3期84-90,共7页Insulating Materials

摘　　要：为研究架空导线的径向温度场分布情况,首先以传热学理论为基础,根据导线的物理结构建立有限元三维仿真模型,并设计仿真实验,然后对仿真结果与实验结果进行对比分析。结果表明:自然对流条件下,导线径向温差最高可达10.4℃,不同方位上导线表面最大温差为3.4℃。自然对流条件下的仿真结果与实测值基本吻合,导线各层温度的相对误差均在±5%以内,验证了仿真模型的可靠性;强制对流条件下,仿真结果与实测值存在较大差异,说明不同散热条件引起的导线轴向传热对导线的径向温度场分布造成显著影响。出于保守考虑,工程测温中通过测得导线不同方位上的最大表面温度值乘以修正系数1.05~1.10即可得到导线线芯温度值。In order to study the radial temperature field distribution of overhead conductor, firstly, on the basis of heat transfer theory, a 3 D model of finite element simulation was established according to the physical structure of conductor, and a simulation experiment was designed. Then the simulation and experimental results were compared. The results show that under natural convection conditions, the maximum radial temperature difference of the conductor can reach 10.4℃, and the maximum surface temperature difference of different position on conductor is 3.4℃. The simulation results coincide with the measured values under natural convection conditions basically, and the relative error between each layer temperature of the conductor is within ±5%, which verifies the reliability of the simulation model. Under forced convection conditions, there are obvious difference between simulation results and measured values, which indicates that the axial heat transfer of the conductor caused by different heat dissipation conditions has significant effect on the radial temperature field distribution of the conductor. For conservative consideration, in practical applications, the core temperature of conductor can be calculated by multiplying the maximum surface temperature of conductor measured from different position of conductor with correction coefficient of 1.05-1.10.

关 键 词：架空导线 径向温差 有限元仿真 轴向传热 表面温度 线芯温度 

分 类 号：TM245[一般工业技术—材料科学与工程]