A floating marine platform is provided including a central column, at least three peripheral columns circumferentially around the central column, radially extending beams from the central column that connect the peripheral columns with the central column, and structural members spanning between each adjacent pair of peripheral columns. The structural members are pre-tensioned.

The disclosure provides a method and system to monitor and advise the status of a group of floating platforms, such as offshore floating wind platforms, by using a floating platform's motion in the group and detect one or more anomalies to identify one or more disorders (including irregularities) in the group. Input for this method can include information of wind speed and direction and orientations of the wind turbine nacelles. The orientation of the platform can complement the orientation of a wind turbine nacelle on the platform in case the platform is equipped with a turret. Disorders include, but not limited to, mooring line failure, shifts of a drag anchor, other issues with the mooring system components such as fairleads, issues with the ballasting configuration of the floater, issues with the turret (if any), issues with the swivel of the nacelle, issues with the rotor, and issues with the blades.

The disclosure provides a method and system to monitor and advise the status of a group of floating platforms, such as offshore floating wind platforms, by using a floating platform's motion in the group and detect one or more anomalies to identify one or more disorders (including irregularities) in the group. Input for this method can include information of wind speed and direction and orientations of the wind turbine nacelles. The orientation of the platform can complement the orientation of a wind turbine nacelle on the platform in case the platform is equipped with a turret. Disorders include, but not limited to, mooring line failure, shifts of a drag anchor, other issues with the mooring system components such as fairleads, issues with the ballasting configuration of the floater, issues with the turret (if any), issues with the swivel of the nacelle, issues with the rotor, and issues with the blades.

A deep-sea multi-energy integrated platform for complementary power generation, production, living and exploration includes a platform body and a sustainable power supply system, where the platform body includes a column cabin, an upper platform housing, a lower platform housing and a current guide column; the column cabin, the current guide column, the lower platform housing and the upper platform housing are mutually connected to form a triangular platform with a hollow cavity, and a net is disposed in the hollow cavity to form a mariculture zone; the sustainable power supply system includes a wind-driven generator disposed at an end of a top surface of the upper platform housing, a solar panel disposed above a middle portion of the top surface of the upper platform housing, a wave power generation apparatus disposed on the current guide column, and several tidal current power generation apparatuses.

A deep-sea multi-energy integrated platform for complementary power generation, production, living and exploration includes a platform body and a sustainable power supply system, where the platform body includes a column cabin, an upper platform housing, a lower platform housing and a current guide column; the column cabin, the current guide column, the lower platform housing and the upper platform housing are mutually connected to form a triangular platform with a hollow cavity, and a net is disposed in the hollow cavity to form a mariculture zone; the sustainable power supply system includes a wind-driven generator disposed at an end of a top surface of the upper platform housing, a solar panel disposed above a middle portion of the top surface of the upper platform housing, a wave power generation apparatus disposed on the current guide column, and several tidal current power generation apparatuses.

A buoyant offshore renewable energy system mounting platform is provided for positioning a renewable energy device in a body of water, the body of water comprising a surface and a bed, the platform comprising a framework, comprising at least three vertexes, and at least one mooring member for positioning the platform relative to the surface and bed of the body of water. Each of the at least three vertexes having at least one buoyancy member. The buoyancy member preferably comprising a plurality of buoyancy units wherein at least one of the buoyancy members comprises a renewable energy device selected from: a renewable energy convertor; a renewable energy harnessing apparatus; a renewable energy processing apparatus; a renewable energy storing apparatus; a renewable energy data capture apparatus; a data storing apparatus.

A method and a device for dampening movement in a multiple rotor (MR) wind turbine located at sea and comprising a tower (2) extending in an upwards direction, a load carrying structure (3, 4) forming a first section (3) and a second section (4), the first and second sections extending in different directions away from the tower (2). To provide efficient dampening of the movement, the method comprises tethering a first body (20) to the first section (3), the first body being at least partly submerged into the sea.

A method and a device for dampening movement in a multiple rotor (MR) wind turbine located at sea and comprising a tower (2) extending in an upwards direction, a load carrying structure (3, 4) forming a first section (3) and a second section (4), the first and second sections extending in different directions away from the tower (2). To provide efficient dampening of the movement, the method comprises tethering a first body (20) to the first section (3), the first body being at least partly submerged into the sea.

A wind turbine foundation structure comprising a hollow structural member having a longitudinally extending circumferential wall, the wall being bounded at the top by a top end face and bounded at the bottom by a bottom end face, wherein the wall is formed from a mineral building material and in that a wall thickness of the wall tapers from the top end face towards the bottom end face.

A system for maintaining buoyant, energy-capture devices in general relative position in water in the presence of surface waves allows heeling of the energy capture devices while preventing collision. The system includes a grid of structural members that resists compression while permitting limited relative surface displacement between the first and second energy-capture devices. The structural members may be partially compressible and provide a restoring force, and they may allow heeling. Electricity from wave energy capture devices is combined in a way that smoothes variations inherent in wave action. Electricity from wind energy capture devices is combined with energy from wave energy capture devices for transmission to shore.