摘要
海底电缆作为高压电力的输送管缆,在运行期间会产生大量的热,海缆的温度场分析需重点关注。本文以海底交联聚乙烯(XLPE)三芯海缆为例,介绍了计算温度场和载流量的方法。基于IEC60287标准建立热路模型,推导了三芯海缆导体和外表面的温度差和载流量计算公式。利用COMSOL Multiphysics软件建立二维海缆模型。模拟温度场分布并与解析计算结果进行对比,结果表明导体温度在两种情况下计算的误差在1%内,且随着载流的增大,导体温度增加的幅度逐渐增大;而载流量在两种情况下计算的误差在1.5%左右,但随着环境温度的增大,载流量降低的幅度基本不变。
Submarine cables are used for high-voltage power transmission.During operation,it will generate a large amount of heat which should be focused on.In this article,a method of calculating the temperature field and current-carrying capacity is introduced by taking one submarine cross-linked polyethylene(XLPE)three-core cable as an example.Based on the IEC 60287 standard,a thermal circuit model is established,and the temperature difference between cable conductor and outer surface and current-carrying capacity calculation formula of cable conductor are derived.The finite element software COMSOL Multiphysics is used to establish a two-dimensional cable model,and the temperature distribution is simulated and compared with the results calculated by analytical formula.The results show that the calculated error of the conductor temperature calculated from the above two methods cases is within 1%,and the increase amplitude of conductor temperature gradually increases with the increase of the current.While the calculation error of the ampacity in both cases is about 1.5%,however,the decreasing amplitude of current-carrying ampacity is basically unchanged with increasing of the environment temperature.
作者
张巍伟
Zhang Weiwei(Offshore Oil Engineering Co.,Ltd Engineering Company,Tianjin 300451,China)
出处
《船电技术》
2020年第10期40-44,共5页
Marine Electric & Electronic Engineering
关键词
海底电缆
热路模型
有限元
温度场
载流量
submarine cable
thermal circuit model
finite element model
temperature field
current-carrying capacity
