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 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 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 modular floating platform connector includes a connecting unit with a hollow center chamber that has one or more inside diameters. The chamber may have wall surfaces to secure components to modular floating platforms. The connector may further incorporate one or more external features such as a collar and retaining ribs that engage with the connecting tabs on modular floating platform float modules to securely hold the float modules together and to retain attachment members of accessories, fixtures, structures and other components to modular floating platforms.

A method of installing a wind turbine generator onto a floating foundation. The floating foundation has variable buoyancy and is pre-ballasted to float at a predetermined vertical position before installation of a wind turbine generator component onto the floating foundation. A wind turbine generator component supported by lifting equipment is brought towards the floating foundation until contact is made with the floating foundation. Ballast is removed from the floating foundation to increase the buoyancy of the floating foundation such that weight of the wind turbine generator component supported by the floating foundation is increased from substantially zero to substantially the entire weight of the wind turbine generator component. The vertical position of the floating foundation is substantially unchanged during transferring weight of the wind turbine generator component onto the floating foundation.

A method of installing a wind turbine generator onto a floating foundation. The floating foundation has variable buoyancy and is pre-ballasted to float at a predetermined vertical position before installation of a wind turbine generator component onto the floating foundation. A wind turbine generator component supported by lifting equipment is brought towards the floating foundation until contact is made with the floating foundation. Ballast is removed from the floating foundation to increase the buoyancy of the floating foundation such that weight of the wind turbine generator component supported by the floating foundation is increased from substantially zero to substantially the entire weight of the wind turbine generator component. The vertical position of the floating foundation is substantially unchanged during transferring weight of the wind turbine generator component onto the floating foundation.

A method of installing an offshore wind turbine includes the step of raising a full-length tower for the offshore wind turbine by moving it longitudinally from a container in a substructure, the substructure being a support structure for the wind turbine, wherein the substructure is arranged with a container configured for housing a tower for the wind turbine substantially in its entirety.

A method of installing an offshore wind turbine includes the step of raising a full-length tower for the offshore wind turbine by moving it longitudinally from a container in a substructure, the substructure being a support structure for the wind turbine, wherein the substructure is arranged with a container configured for housing a tower for the wind turbine substantially in its entirety.

A method and an installation facility for assembling a plurality of floating wind turbines (12). The method comprising establishing an installation facility by arranging an installation vessel (1), having a crane (4), at a sheltered place, mooring a barge (2) next to said vessel (1). Further transporting a plurality of turbine blades (6), a plurality of tower sections (8) and a plurality of nacelles (10) to said installation facility, lifting of these parts onto said installation facility. Further towing a first floating wind turbine foundation (11 a) to said installation facility, erecting a tower (8a) on said first foundation (11 a) by assembling a set of said tower sections (8), installing a nacelle (10) on top of said tower (8a), installing a set of turbine blades (6) onto said nacelle (10) to make a completed wind turbine (12a), and finally towing said first wind turbine (12a) away.

A method and an installation facility for assembling a plurality of floating wind turbines (12). The method comprising establishing an installation facility by arranging an installation vessel (1), having a crane (4), at a sheltered place, mooring a barge (2) next to said vessel (1). Further transporting a plurality of turbine blades (6), a plurality of tower sections (8) and a plurality of nacelles (10) to said installation facility, lifting of these parts onto said installation facility. Further towing a first floating wind turbine foundation (11 a) to said installation facility, erecting a tower (8a) on said first foundation (11 a) by assembling a set of said tower sections (8), installing a nacelle (10) on top of said tower (8a), installing a set of turbine blades (6) onto said nacelle (10) to make a completed wind turbine (12a), and finally towing said first wind turbine (12a) away.