地下电力电缆温度场及载流量的数值计算  

Numerical Simulation of Thermal Fields and Ampacity of Underground Power Cables

作　　者：于建立[1] 常树生[1] 牛远方[1] 葛丽婷[1] 

机构地区：[1]东北电力大学电气工程学院,吉林吉林132012

出　　处：《东北电力大学学报》2008年第4期62-65,共4页Journal of Northeast Electric Power University

摘　　要：对地下电力电缆温度场和载流量进行了研究。基于有限差分法,采用直角坐标和极坐标相结合的思想,对计算区域进行不均匀网格的划分。对电缆及其周围土壤的温度场进行迭代,并进行两种坐标系之间的插值计算,得到一个收敛的温度场。多次循环后电缆缆芯达到上限温度值,可得电缆的载流量。This paper studies the thermal fields and ampacity of underground power cables. Based on the finite difference method （ FDM）, the thought of combination of Cartesian coordinates and polar coordinates is used. Iteration calculation is used in cable region and surrounding soil region respectively and interpolation is used between the two coordinates. After several times of cycle, when. cable core reaches upper temperature, the ampacity of the cables is obtained.

关 键 词：电力电缆 温度场 载流量 有限差分 坐标组合 

分 类 号：TM247[一般工业技术—材料科学与工程]