A flotation system for an offshore power generation platform comprises: multiple buoyant bodies each containing a high-pressure air and ballast water therein to create buoyancy; connecting members connecting the multiple buoyant bodies to each other; ballast water flowing tubes through which the ballast water contained in the multiple buoyant bodies flows with respect to each other; a high-pressure tank supplying the high-pressure air into the multiple buoyant bodies; a compressor replenishing air pressure present in the high-pressure tank; an equilibrium sensor sensing an equilibrium state of each of the multiple buoyant bodies and transmitting a signal; and a controller controlling, in response to the signal from the equilibrium sensor, an amount of air supplied from the high-pressure tank to the buoyant body and an amount of air discharged from the buoyant body.

A mooring system for mooring a floating platform having a plurality of stabilizing arms with floats, the mooring system including an anchoring system containing a plurality of anchors and anchoring cables for anchoring the mooring system in deep sea. The center part of the mooring system includes a mooring unit containing a plurality of mooring elements and positioning wires, where each mooring element is connected to an adjacent mooring element with a positioning wire and to an anchor.

A floating platform for high-power wind turbines, comprising a concrete substructure, said concrete substructure forming the base of the platform, which remains semi-submerged in the operating position, and consisting of a square lower slab on which a series of beams and five hollow reinforced concrete cylinders are constructed, distributed at the corners and the center of said lower slab; a metal superstructure supported on the concrete substructure and forming the base for connection with the wind turbine tower, said tower being coupled at the center thereof; and metal covers covering each of the cylinders, on which the metal superstructure is supported and to which vertical pillars are secured, linked together by beams, which join at the central pillar by an element whereon the base of the wind turbine tower is secured.

A floating device for supporting an offshore wind turbine, comprising a central floating pillar for fixedly receiving a tower of the wind turbine, at least three peripheral floaters, and one leg per floater, each leg extending in a longitudinal direction that runs radially in relation to the central pillar; each leg has a proximal end that is secured to the central pillar, and a distal end that is secured to the floater; the legs include an outer tubular element, which extends in the longitudinal direction of the leg and has a curved cross-section perpendicularly to the longitudinal direction, and an inner tubular element, which extends in the longitudinal direction of the leg and has a polygonal cross-section perpendicularly to the longitudinal direction, the polygonal cross-section being inscribed in the curved cross-section. The invention also relates to a floating wind turbine unit comprising the device and a wind turbine.

A floating offshore structure includes a buoyant hull including a first column, a second column, and a pontoon coupled to the first column and the second column. The pontoon extends horizontally from the first column to the second column. The pontoon includes a first tubular member, a second tubular member positioned laterally adjacent to the first tubular member, a first edge plate extending horizontally from the first tubular member, and a second edge plate extending horizontally from the second tubular member. The first tubular member and the second tubular member are disposed between the first edge plate and the second edge plate. Each tubular member has a central axis, a first end coupled to the lower end of the first column, and a second end coupled to the lower end of the second column. The longitudinal axis of the first tubular member and the longitudinal axis of the second tubular member are disposed in a common horizontal plane.

The invention relates to a ducted wind turbine having a turbine rotor assembly which extracts kinetic energy from air flowing there past. The rotor assembly includes a plurality of rotor blades having rotor tips at their outermost ends which define a rotor tip sweep circumference. A duct assembly at least partially surrounds said rotor tip sweep circumference and a base platform supports the ducted wind turbine. The duct assembly is mounted on the base platform by way of a weathervane bearing arrangement such that the duct assembly may weathervane around the turbine rotor assembly in response to changes in wind direction. A semi-submersible support platform, wave energy capture apparatus, torsional bearing mechanism and a latticework wind turbine tower associated with the ducted wind turbine are also provided.

Disclosed herein are a floating platform and a floating offshore wind power generator with the same. The floating offshore wind power generator according to an embodiment includes a power generator disposed on an upper portion and configured to perform a wind power generation action, and a floating platform configured to support the power generator while floating on the sea. The floating platform includes a plurality of floats provided in the form of a hollow cylindrical shape and erected in a vertical direction, a connecting beam connecting and binding between the plurality of the floats, and a strake having a spiral shape and provided on an outer circumference of a lower region of each of floats while avoiding a connecting position of the connecting beam.

The floating system is a single column tension leg platform for a floating offshore wind turbine (SCTLP). The single column tension leg platform comprises a central main vertical floating column, a buoyant base attached to and disposed below the central main vertical floating column, a station keeping system attached to the buoyant base, and an inter array cable riser system. The buoyant base is of one of a triangular shape and a circular shape.

Techniques and systems to reduce movement of at least one portion of an offshore platform. One portion of the offshore platform can provide a connection to a seafloor. A second portion of the offshore platform provides a lateral force to the first portion of the offshore platform while allowing for vertical movement between the first portion and the second portion of the offshore platform.

A floating offshore structure includes a buoyant hull including a first column, a second column, and a pontoon coupled to the first column and the second column. Each column is vertically oriented and the pontoon extends horizontally from the first column to the second column. Each column has a central axis, an upper end, and a lower end. The pontoon includes a first tubular member and a second tubular member positioned laterally adjacent to the first tubular member. Each tubular member has a central axis, a first end coupled to the lower end of the first column, and a second end coupled to the lower end of the second column. The longitudinal axis of the first tubular member and the longitudinal axis of the second tubular member are disposed in a common horizontal plane.