Semi-submersible high-power offshore floating type wind power platform with flat lower floating bodies

Abstract

The invention relates to a semi-submersible high-power offshore floating type wind power platform with flat lower floating bodies, which comprises a fan and a tower drum arranged at one end of the tower drum. The platform further comprises a platform body, a mooring cable and an anchoring foundation. The platform body is connected with the anchoring foundation and positioned through the mooring cable. The platform body comprises a plurality of stand columns, a plurality of lower floating bodies and a plurality of upper supporting rods. The lower floating bodies are in butt joint to form a polygonal structure, the stand columns are installed on the surfaces of the lower floating bodies and located at the vertexes of the polygonal structure, the upper supporting rods are arranged along the side lines of the polygonal structure and connected between the adjacent stand columns, and the other end of the tower drum is connected with any one stand column. The floating type wind power platformis simple in structure, the wave area of the stand columns is small, the flat lower floating bodies are located at the deep position below the water surface, the wave force borne by the body is small, movement of the platform in waves can be reduced, and the wave resistance of the floating type wind power platform is improved. Due to the fact that no supporting rod structure exists underwater, fatigue nodes are few, and maintenance of the platform structure is facilitated.

Description

technical field [0001] The invention relates to the technical field of marine renewable energy, in particular to a semi-submersible high-power offshore floating wind power platform suitable for operation in sea areas with a water depth not less than 30 meters. Background technique [0002] At present, although the development and utilization of offshore wind power in my country has a certain scale, it is mainly developed based on fixed offshore wind farms. This kind of wind farm mainly uses single piles or jacket foundations to fix wind turbines on the seabed. Two technologies The biggest drawback is that the application in sea areas with a water depth of more than 50 meters will lead to a sharp increase in engineering difficulty and manufacturing costs. Sea areas with a water depth of more than 50 meters have the characteristics of higher wind speed and better wind quality, higher power generation efficiency, and greater development potential. [0003] As a special type of ...

AI Technical Summary

Problems solved by technology

[0003] As a special type of platform, the floating wind power platform is fundamentally different from conventional marine structures. Unfavorable factors such as the large weight of the wind turbine itself, the high center of gravity, the wind receiving area and the large wind inclination moment make the overall layout and configuration of the floating wind power platform Design is more technically challenging than traditional floating platforms

When the power of the wind turbine increases, the scale of the unit becomes larger and the wind load it receives increases, to ensure that the movement angle of the floating wind power platform is small in waves (especially in severe sea conditions, where the significant wave height is large and the spectrum peak period is long), It is necessary to increase the roll and pitch stiffness of the floating wind power platform system accordingly. If the mass matrix of the system cannot be increased accordingly, the resonance period of the platform will be reduced, and the resonance period may fall within the range of the wave period. System resonance occurs, endangering the safety of the floating wind power platform system

Images