A floating foundation includes a plurality of unit modules that can be fabricated in an efficient manner and then assembled, on shore or afloat near the deployment location. The floating foundation can be applied to various offshore energy systems, such as wind power generation, and in deployment locations with limited infrastructure.

A wind-energy-power-generating device is disclosed for flotation on a body of water. The device includes a turbine assembly having rotor blades rotating about a rotation axis for harnessing kinetic energy from an airflow. The device includes a cowl at least partially surrounding said turbine assembly and defining an airflow passageway between a cowl inlet and outlet, having an inlet and outlet axis, respectively. The inlet and outlet axis intersect at a redirect angle. The device includes a base platform adapted to support the turbine assembly and cowl on the water. The cowl is rotatably mounted on the base platform such that it is rotatable around the turbine assembly to self-align with a wind direction. Stabilising arms extend from the base platform and are spaced circumferentially around a platform axis, to stabilise it on the water. A wind-energy-power-generating device secured to the ground or other fixed non-floating structure is also described.

A semi-submersible floating wind power generator includes a wind power generator set, a post device, a load carrying device and a mooring device. The wind power generator set is disposed at a first end of the post device. The load carrying device is disposed at a second end of the post device. The mooring device is disposed at the second end of the post device. The post device includes a main post and multiple auxiliary posts. The main post is disposed in parallel with the multiple auxiliary posts, and second ends of the multiple auxiliary posts are aligned such that the second ends of the multiple auxiliary posts form a first plane, and the second end of the main post is disposed at a position closer to the first end of the main post than the first plane.

Disclosed are wind turbines suitable for floating application. The wind turbines include multiple floats and multiple towers connected to the floats, a turbine rotor, including a hub and a plurality of blades, structurally supported by the plurality of towers, the turbine rotor coupled to an electrical generator; and have a very shallow draft even for rated capacities of at least 1 MW. The wind turbines can have a single mooring line for yawing eliminating the need for a nacelle, and can allow for deck-level belt driven electrical generators without the need for gear boxes.

The invention relates to a floating windmill installation (1, 1′, 1″), wherein the floating windmill installation (1, 1′, 1″) comprises: —a windmill (10, 10′) comprising a tower (14), —a floating installation (20, 20′) comprising an aperture (22) penetrating the floating installation (1, 1′, 1″) for accommodating the tower (14), and—means for raising and lowering the tower (14) up and down through the aperture (22).

The present invention discloses a large-scale model testing system of a floating offshore wind power generation device, and a method for manufacturing the large-scale model testing system. The large-scale model testing system comprises a floating wind power generation device model, model response measurement systems and environmental parameter measurement systems. The floating wind power generation device model comprises a floating foundation and a tower, wherein a wind turbine is connected to the top of the tower. A plurality of anchoring devices is connected to the side surface of the floating foundation. Each model response measurement system comprises an IMU unit, a wind turbine monitoring unit and an anchoring tension measurement unit. Each environmental parameter measurement system comprises a buoy-type wave height meter, a wind speed and direction meter and a flow velocity and direction meter.

Techniques are disclosed herein for minimizing movement of an offshore wind turbine. Using the technologies described, a wind turbine may be mounted on a marine platform that is constructed and deployed to reduce environmental loads (e.g., wind, waves, . . . ) on the platform in both shallow and deep water. In some configurations, a fully restrained platform (FRP) is configured to support a wind turbine. According to some examples, moorings are attached to the FRP and/or the structure of the wind turbine structure to reduce movement in six degrees of freedom.

A method and system for tensioning a hyperstatic system involves two structures connected to each other, including: a) connecting, by at least one non-adjustable tendon and at least one adjustable tendon which is formed by a tendon coupled to a cylinder in an initially retracted position, an upper structure to a lower structure which is positioned below the upper structure while maintaining zero tension in the tendons; step b) applying a force to the upper structure and/or the lower structure in order to tension each adjustable tendon and to deploy the respective cylinder thereof, the tension of each non-adjustable tendon remaining at zero; and step c) progressively increasing the force until the tension of each non-adjustable tendon reaches a threshold value which brings about a load transfer from the lower structure to the upper structure to allow the lower structure to be supported by the upper structure.

A method for constructing a floater for a floatable wind energy power plant includes providing a first pre-assembled part with at least one first connection arrangement, providing a second pre-assembled part with at least one second connection arrangement, arranging the at least one first connection arrangement of the first pre-assembled part proximate to the at least one second connection arrangement of the second pre-assembled part so as to form a connection site which includes at least a part of the at least one first connection arrangement and at least a part of the at least one second connection arrangement, sealingly arranging an enclosure about the connection site so as to seal the enclosure against an ingress of water, and connecting the first pre-assembled part and the second pre-assembled part at the connection site. Each of the first pre-assembled part and the second pre-assembled part are floatable.

A method for controlling an inclination of a floating wind turbine platform to optimize power production, or to reduce loads on the turbine, tower, and platform, or both, includes receiving data associated with the inclination of the floating wind turbine platform and wind speed and direction data. An angle of difference between the turbine blade plane and the wind direction is determined, where the angle of difference has a vertical component. A platform ballast system is then caused to distribute ballast to reduce the vertical component to a target angle chosen to optimize power production, or reduce turbine, tower, and platform loads, or both.