直埋电力电缆温度场计算模型  

Mathematical Model for Calculation of the Temperature Profile in Buried Power Cables

作　　者：周晓虎[1] 周秧[1] 唐雷[1] 童剑[2] 于建立[1] 

机构地区：[1]东北电力大学电气工程学院,吉林吉林132012 [2]浙江电力教育培训中心浙西分中心,浙江建德311600

出　　处：《电线电缆》2007年第5期33-36,共4页Wire & Cable

摘　　要：研究了埋设于复杂土壤中的电力电缆在暂态和稳态情况下的温度场和载流量,用有限差分法离散传热方程,对电缆和土壤区域分别采用极坐标和直角坐标;为了加快计算速度,采用了不均匀网络。本模型适用于电力电缆稳态和短路或过载等暂态的温度场和载流量的计算。The temperature profile and current carrying capacity in the transient state and steady state of the power cables buried in muhilayered soil were investigated. A mathematical model based on the finite different method was presented to solve the heat diffusion equation in cylindrical coordinates in the cable and in Cartesian coordinates in the surrounding soil. A variable step discretization was used to quicken the calculation. The model is used to calculate the temperature profile and current carrying capacity in the steady state and transient state （such as short circuit or overloading） of power cables.

关 键 词：有限差分 载流量 温度场 电力电缆 

分 类 号：TM247[一般工业技术—材料科学与工程]