浮式风机共享锚点系泊系统动力响应分析与成本评估

为提高海上浮式风机(Floating Offshore Wind Turbine, FOWT)的系泊效率和经济效益，以NREL 5 MW海上浮式发电机组OC3 Hywind系泊系统为研究目标，研究一种新型多系泊线共享锚点的系泊设计方式，即风电场中多个相邻风机共享锚点，将多线锚净力定义为作用在该锚上的系泊线张力的矢量和，并在SIMA RIFLEX软件中进行时域响应模拟，对多线共享锚点系泊系统进行动力响应分析和成本评估。结果表明：对于大规模海上风电场，采用3线和4线共享锚点的设计可使所需锚点的数量分别降低66.7%和75.0%;与传统的单线锚系泊相比，3线和4线共享锚点的设计均使多线锚载荷减小；对于风机数量为100个的大规模风电场而言，采用3线和4线共享锚点的设计可使风电场中锚的总成本分别降低55.94%和63.49%。该研究可为共享系泊设计在海上风电场中的应用提供参考。

Dynamic Response Analysis and Cost Evaluation of Floating Offshore Wind Turbines with Shared Anchor Mooring System

In order to improve the mooring efficiency and economic benefits of Floating Offshore Wind Turbine (FOWT), the OC3 Hywind mooring system of NREL 5 MW offshore floating generator set is taken as the research objective. A novel design method of multiline shared anchor is studied, that is, the adjacent wind turbines in the wind farms share anchors instead of being moored separately. The multiline anchor net force is computed as the vector sum of the contributing mooring line tensions acting on the anchor. The time domain simulation is performed in SIMA RIFLEX, the dynamic response of the multiline shared anchor mooring system is analyzed and the cost is evaluated. the results show that: for large scale offshore wind farms, using 3-line and 4-line shared anchor design can reduce the number of anchors required by 66.7% and 75.0%, respectively; in terms of dynamic response, compared with the conventional single-line mooring, the 3-line and 4-line anchor load of shared anchor design is reduced; for large-scale wind farm with 100 wind turbines, the mooring anchor cost could be reduced by 55.94% and 63.49% by adopting the design of 3-line and 4-line shared anchor. The study can provide reference for the application of shared anchor mooring in the offshore wind farm.