500 kV海底电缆损耗分析与节能措施

由于特殊的敷设环境，海底电缆的损耗是设计选型时需要重点关注的问题，登陆段的损耗发热更是海缆工程传输电流受限制的瓶颈。从海缆结构、影响因素等方面对海缆损耗进行分析，建立了海缆损耗计算模型；以第二回海南联网工程为例，计算了四种不同铠装型式的500 kV海缆在海底、滩涂、陆地三种敷设环境下的损耗以及经济运行成本，并提出了扁铜线铠装海缆是海底联网工程的首选产品；最后总结分析了有效的登陆段节能降损措施。

Power Loss Analysis and Energy Saving Measures of 500 kV Submarine Cables

Due to the special laying environment, the loss of submarine cables is one of the focuses in the design and model selection stage, especially the loss in the landing parts of the cables which generates heat and becomes a bottleneck to constrain the transfer current. Basod on analysis of structure and loss influence factors, the calculation model is set up. For Hainan interconnection project II, the loss and economic operation cost of four different armoring 500 kV cables at three laying environment (the bottom of the sea, tidal flats, landing parts) are calculated, and the flat copper wire armoured cable is proposed as the first choice for submarine project. Finally, the effective energy saving measures for the landing parts are analyzed.