基于有限元分析的水下脐带电缆电场与温度场特性  

Electric Field and Temperature Field Characteristics of Subsea Umbilical Cable Based on Finite Element Method

作　　者：刘骥[1] 李秀婧[1] 高欢[2] 郭宏[3] 

机构地区：[1]哈尔滨理工大学电气与电子工程学院,哈尔滨150080 [2]上海电缆研究所,上海200093 [3]中国海洋石油总公司研究总院,北京100027

出　　处：《高电压技术》2014年第6期1658-1665,共8页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2012CB723308);国家高技术研究发展计划(863计划)(2009AA09Z301-1)~~

摘　　要：为解决具有复杂结构单元的水下采油生产用脐带缆无法利用传统解析方法确定绝缘厚度和载流量的问题,采用有限元法计算、分析了脐带缆端面的电场与温度场分布。通过对不同绝缘材料、绝缘厚度与结构形式的脐带缆模型进行对比研究,给出了利用ANSYS软件优化确定脐带缆载流量的方法。研究结果表明,脐带缆中电缆单元的相对位置对电场分布影响很小,而电场主要集中在电缆单元内部导体的相线间;电场分析得出交联聚乙烯绝缘的临界厚度为0.25 mm;不同脐带缆结构中,中心钢管结构脐带缆的载流量可达近60 A,散热性能优于中心电缆结构脐带缆;此外,分别采用交联聚乙烯与乙丙橡胶绝缘的2类脐带缆的最高场强与载流量差异并不明显。综上,有限元方法可以用来确定脐带缆绝缘厚度与额定载流量。The umbilical cables used for subsea oil production have complex units, so the traditional analytical method is unable to determine their insulation thickness and ampacity. To solve this problem, we used a finite element method to calculate and analyze the electric filed and temperature field in umbilical cables. We also compared umbilical models with different insulating materials, different insulation thicknesses and different structure forms, and then proposed a method of optimization design based on ANSYS, for determining the ampacity of umbilical cable. It is shown that the relative positions of units in umbilical cable hardly affect the distribution of electric field, while the electric field mainly focuses on the phase-phase line of inner conductor in the units. According to analysis of electric field, the critical thickness of crosslinked polyethylene（XLPE） is 0.25 mm. As for the umlicical cables with different structures, the one with central steel tube has ampacity up to about 60 A, which is superior to the type with central cable. However, there are slight differences in peak electric field and amplicity between XLPE cable and ethylene-propylene rubber（EPR） cable. Conclusively, the finite element method is applicable for determining the insulation thickness and ampacity of umbilical cables.

关 键 词：脐带缆 有限元法 电场 绝缘厚度 温度场 载流量 

分 类 号：TM247[一般工业技术—材料科学与工程]