A high-voltage electrical power supply line for the provides a secure and water-proof connection transfer of high-voltage electricity through an inner high-voltage electrical cable between a single point mooring (SPM) buoy and/or a caternary anchor leg mooring (CALM) buoy and an LNG vessel moored to the SPM CALM buoy, with a secured connection on each end of the high-voltage electrical cable, disallowing and prevent current flow through high-voltage electrical cable until a secure and confirmed connection is established between connectors attaching the high-voltage electrical power supply line to the SPM CALM buoy and the LNG vessel.

A floating cable connection for an offshore structure such as a floating wind turbine comprises two or more substantially parallel elongate tubes each comprising an internal passageway for accommodating a respective cable. At least one buoyant element is fixed to the tubes and support formations fixed relative to the or each buoyant element are arranged to hold the tubes in an upright orientation on the offshore structure. The buoyant element comprises a hollow housing containing at least one electrical connector such as a junction box within a watertight internal compartment. The or each connector electrically connects upper ends of the cables to each other.

A floating cable connection for an offshore structure such as a floating wind turbine comprises two or more substantially parallel elongate tubes each comprising an internal passageway for accommodating a respective cable. At least one buoyant element is fixed to the tubes and support formations fixed relative to the or each buoyant element are arranged to hold the tubes in an upright orientation on the offshore structure. The buoyant element comprises a hollow housing containing at least one electrical connector such as a junction box within a watertight internal compartment. The or each connector electrically connects upper ends of the cables to each other.

The present invention provides for an adaptive tension compensator system for offshore charging of a vessel via an umbilical cable of a motor driven reeling drum provided at a power station. The compensator system comprises a motor hub member (102), mountable to a motor shaft (20) and configured to transmit rotary motion between a motor (18) and the reeling drum (16) along a first rotational axis (104); a reel hub member (106), mountable to the reeling drum, arranged coaxial with said motor hub member and configured to transmit rotary motion between the reeling drum and the motor, and a coupling mechanism (108), operably coupled between said reel hub member and said motor hub member, adapted to transmit rotary motion between said reel hub member and said motor hub member when the motor is in a first mode, and adapted to provide a biased rotational motion of said reel hub member about said first rotational axis between a first angular position (110) and a second angular position (112) relative to said motor hub member, when the motor is in a second mode.

A method for connecting an offshore cable end and a platform cable end on a platform includes the steps of pulling the offshore cable end, which is covered by a pull-in head, onto the platform through the pull-in head, fixating the offshore cable end in a platform-mounted hang-off device, and removing the pull-in head from the offshore cable end. The platform cable end is placed in a predefined position relative to the fixated offshore cable end and the offshore cable conductor and the platform cable conductor are connected by attaching an offshore cable conductor and a platform cable conductor to a connector. The offshore cable end, the platform cable end, and the connector are enclosed by a joint body.

A rigid sea joint system for jointing submarine power cables, the rigid sea joint system including: an outer mechanical metal casing arranged to accommodate an electrical joint between a first submarine power cable and a second submarine power cable, the outer mechanical metal casing having a first end provided with a first opening configured to receive a portion of the first submarine power cable into an interior of the outer mechanical metal casing, and a second end provided with a second opening configured to receive a portion of the second submarine power cable into the interior of the outer mechanical metal casing, a first metal adapter flange attached to the first end, around the first opening, a second metal adapter flange attached to the second end, around the second opening, a first metal bend restrictor attached to the first metal adapter flange, a second metal bend restrictor attached to the second metal adapter flange, a first electrically insulating element arranged between the first metal adapter flange and the outer mechanical metal casing, electrically insulating the outer mechanical metal casing from the first metal bend restrictor, and a second electrically insulating element arranged between the second metal adapter flange and the outer mechanical metal casing, electrically insulating the outer mechanical metal casing from the second metal bend restrictor.

A floating power-generation group comprises a floating hub such as a spar buoy that is anchored to subsea foundations by anchor lines. Floating power producer units such as wind turbines are connected electrically and mechanically to the hub. The power producer units are each moored by mooring lines. At least one mooring line extends inwardly toward the hub to effect mechanical connection to the hub and at least one other mooring line extends outwardly toward a subsea foundation. The groups are combined as a set whose hubs are connected electrically to each other via subsea energy storage units. Anchor lines of different groups can share subsea foundations. The storage units comprise pumping machinery to expel water from an elongate storage volume and generating machinery to generate electricity from a flow of water entering the storage volume. The pumping machinery can be in deeper water than the generating machinery.

An apparatus that a wind turbine configured for floating on a surface of water, wherein the wind turbine is operable to generate electrical energy. The wind turbine can include a floating base configured to support the wind turbine on the surface of water, and a cable configured to transmit the electrical energy. The wind turbine can also include a first sheave configured to support a part of the cable, and a second sheave configured to support a part of the cable. The cable is reeved between the first sheave and second sheave, and the first sheave is operable to impart a predetermined force to the cable to thereby maintain the cable at a predetermined tension.

An apparatus that a wind turbine configured for floating on a surface of water, wherein the wind turbine is operable to generate electrical energy. The wind turbine can include a floating base configured to support the wind turbine on the surface of water, and a cable configured to transmit the electrical energy. The wind turbine can also include a first sheave configured to support a part of the cable, and a second sheave configured to support a part of the cable. The cable is reeved between the first sheave and second sheave, and the first sheave is operable to impart a predetermined force to the cable to thereby maintain the cable at a predetermined tension.

A high-voltage electrical power supply line for the provides a secure and water-proof connection transfer of high-voltage electricity through an inner high-voltage electrical cable between a single point mooring (SPM) buoy and/or a caternary anchor leg mooring (CALM) buoy and an LNG vessel moored to the SPM CALM buoy, with a secured connection on each end of the high-voltage electrical cable, disallowing and prevent current flow through high-voltage electrical cable until a secure and confirmed connection is established between connectors attaching the high-voltage electrical power supply line to the SPM CALM buoy and the LNG vessel.