Wave energy converter with surface electric grid

Patent metadata

Field	Value
Publication number	US-11248580-B2
Application number	US-201816495044-A
Country	US
Kind code	B2
Filing date	Mar 19, 2018
Priority date	Mar 18, 2017
Publication date	Feb 15, 2022
Grant date	Feb 15, 2022

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 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 floating motion-to-energy converters, comprising:
a plurality of flexible mooring connectors interconnecting the plurality of floating motion-to-energy converters; and
an electric energy network interconnecting the floating motion-to-energy converters so as to communicate electrical energy generated at the floating motion-to-energy converters to a remote power consumer, the electrical energy network arranged substantially parallel to and adjacent to a surface of the body of water;
wherein the motion-to-energy converters include three or more electrical couplings spaced about the converter's perimeter, and
wherein the electrical couplings are sockets adapted to receive an electrical plug.

2. The energy farm of claim 1 , wherein a mooring cable is connected to a single cable connecting the electric energy network to the floor bed.

3. The energy farm of claim 2 , wherein all of the floating motion-to-energy converters of the electric energy farm utilize the single cable connecting the electric energy network to the floor bed.

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

5. The energy farm of claim 1 , wherein the motion-to-energy converters are interconnected with a pair of mono-pole cables.

6. The energy farm of claim 1 , wherein the motion-to-energy converters each include a central hub housing a plurality of electrical connectors, the central hub enclosed by a removable housing.

7. The energy farm of claim 1 , wherein the motion-to-energy converters include wiring for both serial and parallel energy communication.

8. The energy farm of claim 1 , wherein the motion-to-energy converters include a rectifier.

9. The energy farm of claim 1 , wherein the motion-to-energy converters include a generator.

10. The energy farm of claim 1 , wherein the motion-to-energy converters include a transformer.

11. The energy farm of claim 1 , wherein the motion-to-energy converters are electrically interconnected in a serial manner such that generators on each motion-to-energy converter causes a voltage of each converter to be added to a voltage generated by each of the other converters serially connected.

12. The energy farm of claim 1 , wherein all of the electrical energy collected by the energy farm is forwarded to a power buoy for retransmission to an energy client.

13. The energy farm of claim 1 , wherein the electrical energy is at least partially used by the motion-to-energy converters to generate a chemical fuel.

14. The energy farm of claim 1 , wherein the electric energy network comprises only a single path connecting any two converters within the farm, such that there is no redundant paths through any two converters.

15. The energy farm of claim 1 , wherein the electric energy network comprises no fewer than three direct couplings for every motion-to-energy converter in the network.

16. An energy farm comprising a plurality of floating motion-to-energy converters, comprising:
a plurality of flexible mooring connectors interconnecting the plurality of floating motion-to-energy converters;
an electric energy network interconnecting the floating motion-to-energy converters so as to communicate electrical energy generated at the floating motion-to-energy converters to a remote power consumer, the electrical energy network arranged substantially parallel to and adjacent to a surface of the body of water; and
a network backbone of a highest gauge value cable extending centrally through the network;
wherein the electric energy network comprises electrical cables of different gauge to connect a pair of motion-to-energy converters.

17. The energy farm of claim 16 , wherein a gauge value of a cable connecting two motion-to-energy converters is reduced where the motion-to-energy converters are indirectly connected to the network backbone.

Assignees

• Moffat Brian Lee
• Sheldon Coulson Garth Alexander
• Lone Gull Holdings Ltd

Inventors

• Moffat Brian Lee
• Sheldon-Coulson Garth Alexander

Classifications

• Y02E60/16

  Mechanical energy storage, e.g. flywheels or pressurised fluids · CPC title

• 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

• F05B2240/40

  Use of a multiplicity of similar components · CPC title

• F05B2240/96

  as part of a wind turbine farm · CPC title