基于IEC 60287和有限元法的高压海底电缆温度场分析方法  

Analysis Method for Temperature of High Voltage Submarine Cable Based on IEC 60287 and Finite Element

作　　者：段佳冰 尹成群[1] 吕安强[1] 李永倩[1,2] 

机构地区：[1]华北电力大学电子与通信工程系,河北保定071003 [2]华北电力大学苏州研究院,江苏苏州215123

出　　处：《高压电器》2014年第1期1-6,共6页High Voltage Apparatus

基　　金：中央高校基本科研业务费专项资金(13MS62);福建省电力有限公司重大科技项目(TZ201104);河北省自然科学基金(E2012502045);苏州市科技发展计划项目(SYG201013)~~

摘　　要：高压交联聚乙烯（XLPE）海底电缆结构复杂、敷设环境特殊，分析导体温度时需要考虑较多因素。笔者详细介绍了海缆分层及参数计算注意事项，参照IEC60287标准进行计算，建立了海缆的精确热路模型，获得了海缆导体温度及各层温度的矩阵方程。采用有限元方法仿真了不同环境温度及负荷下的海缆温度场，环境温度在14～24℃之间、电流在100～500A之间变化时，热路模型与有限元仿真获得的导体温度偏差小于0．3℃。仿真结果表明．热路模型得到的导体温度及各层温度关系的计算精度满足要求，且与外界环境温度无关，为精确计算海缆导体温度提供参考。The structure of high-voltage cross-linked polyethylene submarine cable is very complex, and the cable laid in special environment. The method of stratification and the parameter calculation are described in this paper according to IEC 60287 standard. The thermal circuit model and the matrix equation are built up to calculate the temperatures of the conductor and different layers of submarine cable. Finite element method is used to simulate the cable temperature field of different ambient temperature and current, when the ambient temperature is between 14--24℃ and current value changes between 100-500 A, the deviation between the conductor temperatures calculated by thermal circuit model and finite element simulation is less than 0.3 ℃. Analysis result shows that the calculation accuracy of the temperatures of conductor and different layers can meet the requirements, and it is independent of the ambient temperature. The thermal model provides a reference for the accurate calculation of submarine cable conductor temperature.

关 键 词：海底电缆 温度场 IEC 60287 热路模型 有限元法 

分 类 号：TM751[电气工程—电力系统及自动化]