地下直埋电缆温度场和载流量的数值计算  

Numerical Computation of Temperature Field and Ampacity of Underground Cables

作　　者：孟凡凤[1] 李香龙[1] 徐燕飞[1] 梁永春[1] 李彦明[1] 李忠魁[2] 

机构地区：[1]西安交通大学,西安710049 [2]郑州电业局,郑州450006

出　　处：《绝缘材料》2006年第4期59-61,64,共4页Insulating Materials

摘　　要：结合传热学知识对地下直埋电缆温度场进行分析,构造出热传导方程和边界条件后利用有限元法计算了地下电缆的温度场分布,计算区域采用三角形单元剖分法。电缆的载流量采用二分法进行迭代求解。文中给出了三根单芯电缆的温度场分布图,并得到载流量和埋深的关系。In this paper, temperature distributions of buried cable were analyzed according to the knowledge of heat transfer, after constructing heat conduction equation and boundary condition, temperature distributions were calculated with the finite element method in which the grids divided into a triangle format. The ampacities of cables are solved with dichotomy. Temperature distribution maps of three single core cables and the relation between ampacities and buried depth are obtained.

关 键 词：电缆 温度场分布 载流量 热量分析 有限元法 

分 类 号：TM247[一般工业技术—材料科学与工程] O242.21[电气工程—电工理论与新技术]