电缆沟敷设方式下电缆温度场计算模型

针对电缆沟敷设方式下电力电缆的广泛应用以及传统方法载流量计算参数较难确定的不足,根据传热学的基本原理,利用有限单元自动划分法,建立了一种基于有限元法的电缆载流量计算模型,能够按照实际敷设情况的变化对模型参数进行修改。根据电缆的结构参数和周围敷设区域的物性参数分析了电缆沟中电缆区域温度场分布情况,并提出了一种基于二分法来计算电缆载流量的方法。可为优化电缆敷设方案提供理论依据。

Calculation Model of Cable Temperature Field under Cable Trench Laying

Aiming at the popular application of the power cable under cable trench laying and the deficiencies of the traditional methods,of which the calculation parameters are difficult to be determined,based on the principle of heat transfer theory and finite element method（FEM）,a calculation model of cable ampacity is constructed by adopting the method of finite element dividing automatically,and the parameters of the model can be modified conveniently according to the actual situation.Based on the structural parameters of cable and the physical parameters of the laying area,the temperature distribution of different layers of cable trench is analyzed,and the dichotomy is employed to calculate the cable ampacity.It can provide a significant theoretical basis for optimizing the cable laying model.