高电压技术2017，Vol.43Issue(11)：3534-3542,9.DOI:10.13336/j.1003-6520.hve.20171031007
高压直流海底电缆电-热-流多物理场耦合仿真
Coupled Simulation on Electro-thermal-fluid Multiple Physical Fields of HVDC Submarine Cable
摘要
Abstract
Distribution of radial temperature and electric field is an important parameter to reflect the operation state of high-voltage direct-current(HVDC) submarine cables,and it is of great significance to study the electro-thermal coupling law of submarine cable considering fluid field.According to the ±160 kV HVDC submarine cable of Nan'ao project,a three-dimensional (3D) electro-thermal-fluid coupling model of the submarine cable and its laying environment were set up by using the COMSOL Multiphysics finite element analysis software.By using the control variable method,the impacts of ampacity,seawater temperature,and seawater velocity on the radial temperature and electric field distribution of the submarine cable were analyzed by two kinds of laying methods including laying and burying.The results indicate that the ampacity is the main influencing factor of radial temperature and electric field distribution.Based on the model,it is found that the submarine cable conductor temperature and insulation temperature difference both have linear relationship with seawater temperature.Tiny seawater velocity can significantly reduce the temperature of the submarine cable,thus a seawater velocity correction factor of static seawater heat dissipation is proposed.The flow of seawater is beneficial to the heat dissipation of the submarine cable,which results in the change of the temperature distribution of the submarine cable.Furthermore,the flow of seawater will affect the electrical conductivity of the submarine cable insulation material to change the electric field distribution.关键词
高压直流/海底电缆/电-热-流耦合/COMSOL Multiphysics/载流量/温度/海水流速Key words
HVDC/submarine cable/electro-thermal-fluid coupling/COMSOL Multiphysics/ampacity/temperature/seawater velocity引用本文复制引用
郝艳捧,陈云,阳林,邱伟豪,傅明利,侯帅..高压直流海底电缆电-热-流多物理场耦合仿真[J].高电压技术,2017,43(11):3534-3542,9.基金项目
南方电网公司科技项目(K-KY2014-31).Project supported by Science and Technology Project of China Southern Power Grid (K-KY2014-31). （K-KY2014-31）
