基于有限元法的单芯电缆温度场仿真研究

Temperature field simulation of single core cable based on FEM

结合传热学知识对地下直埋单芯电缆温度场进行了研究,利用有限元软件分别仿真了单根电缆和三相电缆的温度场,通过对比分析仿真结果,提出了利用单根电缆温度得到三相电缆温度的方法.结果表明,二者温度差和电流呈现良好的二次函数关系,并且电缆各层的温度差异都可以用同一拟合函数计算得到.将该方法应用到电缆接头的温度场仿真中,使仿真结果更加准确.

Combining with the heat transfer theory,the temperature field of direct buried single core cable is studied.The temperature field of single cable and three-phase cable simulated by using the finite element software.By comparing and analyzing the simulation results,a method of getting three-phase cable temperature through single cable temperature is proposed.The results show that the temperature difference and the current exhibit good quadratic function,and the temperature difference between every layer can be calculated by the same fitting function.And then the method is applied to the cable joint temperature field simulation,so as to make the simulation results more accurate.