Wave energy converter with surface electric grid

Patent metadata

Field	Value
Publication number	US-11879421-B2
Application number	US-202117548462-A
Country	US
Kind code	B2
Filing date	Dec 10, 2021
Priority date	Mar 18, 2017
Publication date	Jan 23, 2024
Grant date	Jan 23, 2024

Abstract

An energy farm having an electrical grid through which power generated by the devices in the farm may be combined and transmitted. The electrical grid is formed through the electrical interconnection of devices in a farm through electrical connections that remain, in whole or at least in part, adjacent to the surface of the body of water on which the devices float. A plurality of flexible converters of the network have no direct or immediate electrical interface with a subsea power cable (i.e. a cable on or under the seafloor), but instead transmit electricity to other converters in a daisy-chained fashion.

First claim

We claim:

1. An energy farm, comprising:
a plurality of motion-to-energy converters adapted to float at an upper surface of a body of water;
a plurality of flexible mooring connectors interconnecting the plurality of motion-to-energy converters;
a power consumer; and
a plurality of electrical cables interconnecting the motion-to-energy converters so as to communicate electrical energy generated at the motion-to-energy converters to the power consumer, the plurality of electrical cables arranged substantially parallel to and adjacent to the upper surface of the body of water;
wherein the motion-to-energy converters generate electricity independent of any other motion-to-energy converter; and
wherein each flexible mooring connector interconnecting first and second motion-to-energy converters does not determine a minimum distance between the first and second motion-to-energy converters.

2. The energy farm of claim 1 , wherein the electrical cables transmit electrical signals of varying electrical currents.

3. The energy farm of claim 1 , wherein the electrical cables transmit electrical signals of varying electrical voltages.

4. The energy farm of claim 1 , wherein the electrical cables transmit electrical signals communicating data to and from the motion-to-energy converters.

5. The energy farm of claim 1 , wherein the mooring system includes buoyant, non-rigid separation-restoring connectors coupling the motion-to-energy converters.

6. The energy farm of claim 1 , wherein the plurality of motion-to-energy converters includes a wave-to-energy converter.

7. The energy farm of claim 1 , wherein the plurality of motion-to-energy converters includes a motion-to-energy converter that is connected to one of one, two, three, four, five, and six electrical cables.

8. The energy farm of claim 1 , wherein the plurality of motion-to-energy converters includes a motion-to-energy converter that permits the transmission of a varying electrical current from a first connected electrical cable to a second connected electrical cable.

9. The energy farm of claim 1 , wherein the plurality of motion-to-energy converters includes a motion-to-energy converter that permits the transmission of a varying electrical voltage from a first connected electrical cable to a second connected electrical cable.

10. The energy farm of claim 1 , wherein the plurality of motion-to-energy converters includes a motion-to-energy converter that permits kserial communication of electrical energy from a first connected electrical cable to a second connected electrical cable.

11. The energy farm of claim 1 , wherein the plurality of motion-to-energy converters includes a motion-to-energy converter that permits a parallel communication of electrical energy from a first connected electrical cable to a second connected electrical cable.

12. The energy farm of claim 1 , wherein the plurality of motion-to-energy converters includes a motion-to-energy converter that includes a rectifier.

13. The energy farm of claim 1 , wherein the plurality of motion-to-energy converters includes a motion-to-energy converter that includes a transformer.

14. The energy farm of claim 1 , wherein the plurality of motion-to-energy converters includes a motion-to-energy converter that includes a generator.

15. The energy farm of claim 1 , wherein a gauge of a first electrical cable is different than a gauge of a second electrical cable.

16. The energy farm of claim 1 , wherein the power consumer is a floating computer data center.

17. The energy farm of claim 1 , wherein the power consumer is a floating chemical-fuel- production apparatus.

18. The energy farm of claim 1 , wherein the power consumer is a floating seawater- mineral-extraction apparatus.

19. The energy farm of claim 1 , wherein the power consumer is an autonomous vessel.

20. The energy farm of claim 1 , wherein the power consumer is a manned vessel.

21. The energy farm of claim 1 , wherein the power consumer is a chemical-processing apparatus.

22. The energy farm of claim 1 , wherein the power consumer is electrically connected to the electrical cables of the energy farm by a terrestrial electrical power grid.

23. The energy farm of claim 1 , wherein the flexible mooring connector is a cable.

24. The energy farm of claim 23 , wherein each motion-to-energy converter is connected to at least one other motion-to-energy converter by a mooring cable and an electrical cable.

25. The energy farm of claim 1 , wherein the flexible mooring connector is buoyant.

26. The energy farm of claim 1 , wherein the flexible mooring connector is supported by buoyant elements separate from the motion-to-energy converters.

Assignees

• Lone Gull Holdings Ltd

Inventors

• Moffat Brian Lee
• Sheldon-Coulson Garth Alexander

Classifications

• F03B13/18 Primary

  where the other member, {i.e. rem} is fixed, at least at one point, with respect to the sea bed or shore · CPC title

• F03B13/14 Primary

  using wave energy · CPC title

• B63B21/50

  Anchoring arrangements {or methods} for special vessels, e.g. for floating drilling platforms or dredgers · CPC title

• F05B2240/40

  Use of a multiplicity of similar components · CPC title

• F05B2240/96

  as part of a wind turbine farm · CPC title