基于护套、铠装环流分配对载流量影响的海缆结构优化研究

Research on Submarine Cable Structure Optimization Based on the Influence ofSheath and Armor Circulation Distribution on Current Carrying Capacity

海缆损耗发热是制约海缆载流量的关键因素,减小海缆损耗提高海缆载流量对提高海缆的可靠性和经济性意义重大。相对于陆缆,海缆多了一层铠装层,结构更加复杂,建立合理的分析模型至关重要。该文对比分析了几种电力电缆建模方式,考虑到海缆结构相对复杂的特点,建立了基于ATP-EMTP的海缆仿真模型。基于此模型,详细分析了铠装层材质对海缆环流的影响,并提出了镀锌钢丝+铜丝的优化方案,分析结果显示,此方案可有效减小涡流损耗的同时大大降低环流损耗,从而提高了海缆的载流量。另外,基于所得到的环流分流特性,提出并验证了进一步减小环流损耗的思路,探讨了可能出现的问题和改善措施。

As the submarine heat loss is the key factor restricting the carrying capacity of the submarine cable,reducing the loss and improving the carrying capacity are significant to enhance the reliability and economy of the submarine cable.Compared with the cable used on land,the cable is more complex due to its additional armor layer.In this paper,several models of the submarine cable are analyzed and a submarine simulation model is established based on the ATPEMTP.The impact on the submarine circulation with different materials is analyzed based on the simulation model.An optimization scheme(galvanized steel wire+copper)is proposed.The analysis results show that this scheme can effectively reduce the eddy current loss while greatly reduce the circulating current loss and improve the carrying capacity of the submarine cable.At last,some ideas for reducing circulation loss are also proposed and some problems which might occur and improvement measures are also discussed.