摘要
Abstract
As wind power development gradually extends to deep and far-offshore areas with richer resources and fewer constraints,the strategic value and development potential of floating offshore wind power technology have become increasingly prominent.However,the assembly of ultra-large-capacity floating wind turbines places higher requirements on onshore ports.Coupled with the limitations such as tight existing port resources,large investment and long construction cycle for new ports,the installation of floating wind turbines has become a key bottleneck restricting the efficient advancement of deep and far-offshore floating wind power projects.This paper proposes and independently develops an innovative offshore installation scheme for floating wind turbines—the mobile terminal scheme.The scheme is divided into two types:the semi-submersible vessel bottom-sitting mobile terminal scheme and the jack-up mobile terminal scheme.Firstly,the parameter settings and operation processes of the two mobile terminal schemes are elaborated in detail.Then,taking the IEA-15MW semi-submersible wind turbine as an example,numerical simulation methods are used to systematically analyze and verify the operation processes and forces of the two mobile terminal schemes,and economic evaluations are conducted.Finally,an analysis is conducted on the advantages and challenges faced by the mobile terminal solution.The research results show that:1)The mobile terminal scheme is located in offshore areas with relatively stable wind and waves and suitable water depth.A marine mobile terminal is formed by the bottom-sitting of a semi-submersible vessel or a jack-up platform,and multiple mooring piles and limit piles are laid to achieve precise positioning and multi-degree-of-freedom motion constraint of the floating body.The floating body is fixed after berthing and sitting on the semi-submersible vessel or jack-up platform,which can effectively reduce the impact risk on the semi-submersible vessel or jack-up platform during the berthing process of the floating body and improve the safety and stability of the overall installation operation.Full-revolving cranes are installed on the installation platforms,which can complete the simultaneous hoisting operation of two wind turbines.2)The mobile terminal scheme does not require the rental of onshore ports,and has the advantages of controllable maintenance costs,high operation efficiency,high flexibility and reliable technology.3)Although the mobile terminal scheme will face challenges in terms of seabed conditions,marine ecological environment impact,technical complexity and operation environment during implementation,these challenges can be effectively addressed through strengthening preliminary surveys,optimizing technical schemes,and strictly implementing safety and environmental protection management to ensure the smooth implementation of the project.The research results provide an economical,efficient and flexible deployment solution for the installation of wind turbines in deep and far-offshore floating wind power projects,and have important supporting significance for promoting the large-scale and commercial development of floating offshore wind power.关键词
海上风电/漂浮式风电机组/离岸安装/移动码头/半潜船/自升式平台/数值模拟Key words
offshore wind power/floating wind turbines/offshore installation/mobile terminal/semi-submersible vessel/jack-up platform/numerical simulation分类
海洋科学
