SE1100744A1 - Combination of wind and wave power plants with a common platform - Google Patents

Combination of wind and wave power plants with a common platform Download PDF

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Publication number
SE1100744A1
SE1100744A1 SE1100744A SE1100744A SE1100744A1 SE 1100744 A1 SE1100744 A1 SE 1100744A1 SE 1100744 A SE1100744 A SE 1100744A SE 1100744 A SE1100744 A SE 1100744A SE 1100744 A1 SE1100744 A1 SE 1100744A1
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SE
Sweden
Prior art keywords
generator
wind turbine
platform
wave
plant
Prior art date
Application number
SE1100744A
Other languages
Swedish (sv)
Inventor
Heinz Lendenmann
Muhamad Reza
Robert Chin
Original Assignee
Abb Research Ltd
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Publication date
Application filed by Abb Research Ltd filed Critical Abb Research Ltd
Priority to SE1100744A priority Critical patent/SE1100744A1/en
Publication of SE1100744A1 publication Critical patent/SE1100744A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • F03D13/25—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
    • F03D13/256—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation on a floating support, i.e. floating wind motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
    • F03B13/14—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy
    • F03B13/16—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem"
    • F03B13/18—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • F03D13/25—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/008—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations the wind motor being combined with water energy converters, e.g. a water turbine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/10—Combinations of wind motors with apparatus storing energy
    • F03D9/11—Combinations of wind motors with apparatus storing energy storing electrical energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/10—Combinations of wind motors with apparatus storing energy
    • F03D9/12—Combinations of wind motors with apparatus storing energy storing kinetic energy, e.g. using flywheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B63B2035/4433—Floating structures carrying electric power plants
    • B63B2035/446—Floating structures carrying electric power plants for converting wind energy into electric energy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B63B2035/4433—Floating structures carrying electric power plants
    • B63B2035/4466—Floating structures carrying electric power plants for converting water energy into electric energy, e.g. from tidal flows, waves or currents
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/727—Offshore wind turbines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

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  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Sustainable Energy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Power Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Wind Motors (AREA)

Abstract

Ett kraftverk 2 för omvandling av vind och vågor till elektrisk energi. Kraftverket innefattar en flytande plattform 3, ett vindkraftverk 1 med vingförsedd rötor kopplad till en generator,. och ett vågkraftverk 6 kopplat till en generator. Vindkraftverket 1 är anordnat på den flytande plattformen 3 och vågkraftverket 6 är väsentligen placerat under vindkraftverket. Kraftverket är avsett att placeras där tillgången på vind- och vågenergi är god, såsom till havs. Vindkraftverket och vågkraftverket överför energi via en genemsam elledning, såsom en havskabel. Kraftverket kan även vara försett med en energilagrande anordning såsom ett svänghjul 4, och förankras med ankare 5 till havsbottnen.(Figur 4)A power plant 2 for the conversion of wind and waves into electrical energy. The power plant comprises a floating platform 3, a wind turbine 1 with winged rotor connected to a generator ,. and a wave power plant 6 connected to a generator. The wind turbine 1 is arranged on the floating platform 3 and the wave power plant 6 is located substantially below the wind turbine. The power plant is intended to be located where the supply of wind and wave energy is good, such as at sea. The wind turbine and the wave power plant transmit energy via a transparent power line, such as a submarine cable. The power plant can also be equipped with an energy storage device such as a flywheel 4, and anchored with anchors 5 to the seabed. (Figure 4)

Description

capture devices. The structural members may be partially compressible and provide a restor- ing force, and they may allow heeling. Electricity from wave energy capture devices is com- bined 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. capture devices. The structural members may be partially compressible and provide a restor- ing force, and they may allow healing. Electricity from wave energy capture devices is com- bined 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.

Abstract Of Us 2011204644 (A1) An energy generator for gcnerating energy from renewable alternative sources, includes: a flotable platform adapted to be partially immersed in a fluid; a tower element arranged on the platfonn and including at least one wind generator for collecting wind energy and converting the same into electric energy, at least one first energy accumulator and at least one inverter.Abstract Of Us 2011204644 (A1) An energy generator for gcnerating energy from renewable alternative sources, includes: a fl otable platform adapted to be partially immersed in a fl uid; a tower element arranged on the platfonn and including at least one wind generator for collecting wind energy and converting the same into electric energy, at least one fi rst energy accumulator and at least one inverter.

The energy generator further includes at least one system for storing and converting mechani- cal energy; the system for storing and converting mechanical energy including at least one charge mechanical accumulator, at least one flywheel balance coupled with the charge me- chanical accumulator and a device for converting mechanical energy into electric energy. The wave motion or the stream of fluid where the platform is immersed determines an oscillating movement of the platform, of the tower element and of the at least one balance to charge the mechanical accumulator, which in tum releases the energy produced by its movement to the device for converting mechanical energy.The energy generator further includes at least one system for storing and converting mechanical energy; the system for storing and converting mechanical energy including at least one charge mechanical accumulator, at least one fl ywheel balance coupled with the charge me- chanical accumulator and a device for converting mechanical energy into electric energy. The wave motion or the stream of fl uid where the platform is immersed determines an oscillating movement of the platform, of the tower element and of the at least one balance to charge the mechanical accumulator, which in tum releases the energy produced by its movement to the device for converting mechanical energy.

Summary of invention It is an object of the invention to make energy production better, avoiding the shortcomings of the prior art, and to provide an electrical power plant for use at deep sea. It may include or be combined with any or all of the above mentioned constructions of the prior art.Summary of invention It is an object of the invention to make energy production better, avoiding the shortcomings of the prior art, and to provide an electrical power plant for use at deep sea. It may include or be combined with any or all of the above mentioned constructions of the prior art.

Within this invention, wind turbine and wave power generator is combined and constructed in one floating platform construction with or without energy storage, so that high energy generation density within a certain area/footprint (e.g. per sqkm) at a deep sea may be obtained.Within this invention, wind turbine and wave power generator is combined and constructed in one platform oating platform construction with or without energy storage, so that high energy generation density within a certain area / footprint (e.g. per sqkm) at a deep sea may be obtained.

For these purposes the invention provides an electrical power generating plant comprising a platform, a wind turbine and a wave power generator in combination, which wind turbine is arranged on the platform and wave power generator is connected to the platform and adapted to extract energy from the movements of the platform, as the platfonn is moved by the sea.For these purposes the invention provides an electrical power generating plant comprising a platform, a wind turbine and a wave power generator in combination, which wind turbine is arranged on the platform and wave power generator is connected to the platform and adapted to extract energy from the movements of the platform, as the platfonn is moved by the sea.

In a preferred embodiment, the platform is a floating platform.In a preferred embodiment, the platform is an platform oating platform.

In an embodiment, the wave power genearator is arranged between the sea bed and the plat- form and adapted to extract energy from the movment of the platform in relation to the sea bed.In an embodiment, the wave power generator is arranged between the sea bed and the platform and adapted to extract energy from the movement of the platform in relation to the sea bed.

In an embodiment, the wind turbine is arranged vertically above the wave power genearator.In one embodiment, the wind turbine is arranged vertically above the wave power generator.

In an embodiment, said plant includes an energy storage system coupled to the wind turbine or the wave power generator, or both, to store energy harnessed by the wind turbine or the wave power generator. Preferably, said energy storage system is a battery system, or altema- tively a fly wheel systern or a combination of battery system and fly wheel.In an embodiment, said plant includes an energy storage system coupled to the wind turbine or the wave power generator, or both, to store energy harnessed by the wind turbine or the wave power generator. Preferably, said energy storage system is a battery system, or altema- tively a wheel y wheel systern or a combination of battery system and wheel y wheel.

In an embodiment, said plant comprises at least one cable terminal for electrical connection to an electrical cable, and being adapted for transferring electrical power that has been generated by plant by means of an electrical cable to a power transmission system such as a power grid.In an embodiment, said plant comprises at least one cable terminal for electrical connection to an electrical cable, and being adapted for transferring electrical power that has been generated by plant by means of an electrical cable to a power transmission system such as a power grid.

In an embodiment, said plant includes means for anchoring the plant, especially the floating platform, such as an anchor.In an embodiment, said plant includes means for anchoring the plant, especially the fl oating platform, such as an anchor.

In an ernbodiment, the plant includes a generator that is common to the wave power generator and the wind turbine.In an ernbodiment, the plant includes a generator that is common to the wave power generator and the wind turbine.

In an ernbodiment, the plant comprises at least one generator that is either dedictated for the wind turbine or the wave power generator, especially one generator for the wind turbine and one generator for the wave power generator.In an ernbodiment, the plant comprises at least one generator that is either dedicated to the wind turbine or the wave power generator, especially one generator for the wind turbine and one generator for the wave power generator.

In an embodiment, the plant, said generator being a rotating type of generator or linear gen- CTQIOI".In an embodiment, the plant, said generator being a rotating type of generator or linear gen- CTQIOI ".

Waves over the sea surface are generated by wind. The speed and the duration of time of the wind blows determine the height of the waves. The invention may be used to utilize the fact that area with stronger wind, such as at deep sea, will also provide stronger waves in such that a combination/hybrid of floating wind turbines and wave power generators is a viable ap- proach for effective hamessing wind and wave power at deep sea.Waves over the sea surface are generated by wind. The speed and duration of time of the wind blows determine the height of the waves. The invention may be used to utilize the fact that area with stronger wind, such as at deep sea, will also provide stronger waves in such that a combination / hybrid of fl oating wind turbines and wave power generators is a viable ap- proach for effective hamessing wind and wave power at deep sea.

Short description of the figures The invention will in the following be described in more detail with reference to the accom- panying drawings, which are illustrating the invention for fascilitating performing of the in- vention and therefore are simplified. The figures are not drawn to scale.Short description of the figures The invention will in the following be described in more detail with reference to the accom- panying drawings, which are illustrating the invention for facilitating performing of the invention and therefore are simpli fi ed. The fi gures are not drawn to scale.

Figure 1 illustrates a first embodiment of a power plant for deep sea. Fig 1 illustrates a hori- zontal-axis wind turbine with floating wave energy power platform. The movement of the floating platform for a floating off-shore horizontal-axis wind turbine is utilized simultaneous- ly for the wave power generation.Figure 1 illustrates the first embodiment of a power plant for deep sea. Fig. 1 illustrates a horizontal-axis wind turbine with fl oating wave energy power platform. The movement of the ating oating platform for a ating oating off-shore horizontal-axis wind turbine is utilized simultaneously- ly for the wave power generation.

Figure 2 illustrates a second embodiment of a power plant for deep sea having a horizontal- axis wind turbine with floating wave energy power platform, with a coupled energy storage device such as flywheel.Figure 2 illustrates a second embodiment of a power plant for deep sea having a horizontal- axis wind turbine with fl oating wave energy power platform, with a coupled energy storage device such as w ywheel.

Figure 3 illustrates a third embodiment of a power plant for deep sea, providing an extension of the first embodiment illustrated in figure 1, where a number of wave generators are con- nected between two floating wind turbine platfonns.Figure 3 illustrates a third embodiment of a power plant for deep sea, providing an extension of the first embodiment illustrated in Figure 1, where a number of wave generators are connected between two wind turbine platforms.

Figure 4 illustrates a fourth embodiment of a power plant for deep sea, including a vertical- axis wind turbine and wave generator utilize one common rotating generator of vertical axis, with or without energy storage system.Figure 4 illustrates a fourth embodiment of a power plant for deep sea, including a vertical-axis wind turbine and wave generator utilize one common rotating generator of vertical axis, with or without energy storage system.

Figure 5 illustrate fifth embodiment of a power plant for deep sea, wherein a horizontal-axis wind turbine and wave generator utilize one common rotating generator with gear/converter for converting rotation of the wind turbine into vertical shafi movement , with or without energy storage system.Figure 5 illustrates an embodiment of a power plant for deep sea, where a horizontal-axis wind turbine and wave generator utilize one common rotating generator with gear / converter for converting rotation of the wind turbine into vertical sha movement, with or without energy storage system .

Description of embodiments Figure 1 illustrates an energy generating plant having a wind mill With a wind turbine of a type having a horizontal axis of rotation, which turbine is provided with a rotor with wings and the turbine is arranged on a pole or tower. The wind turbine is arranged to generate ener- gy, i.e. electrical or mechanical, from the wind. The windmill is secured to a floating plat- form, and the floating platform is connected to an anchor on the sea bed via a first and a second wave generator. The wave generator is provided to use the relative movement between the anchor, i.e. the sea bed, and the platform for generating electrical energy, or alternatively mechanical for further conversion to electrical energy. The energy from the Wind mill and the wave generators are combined in the form of electrical energy and transferred via a common electrical transmission cable to the shore.Description of embodiments Figure 1 illustrates an energy generating plant having a wind mill With a wind turbine of a type having a horizontal axis of rotation, which turbine is provided with a rotor with wings and the turbine is arranged on a pole or tower. The wind turbine is arranged to generate energy, i.e. electrical or mechanical, from the wind. The windmill is secured to an plat oating platform, and the fl oating platform is connected to an anchor on the sea bed via a fi rst and a second wave generator. The wave generator is provided to use the relative movement between the anchor, i.e. the sea bed, and the platform for generating electrical energy, or alternatively mechanical for further conversion to electrical energy. The energy from the Wind mill and the wave generators are combined in the form of electrical energy and transferred via a common electrical transmission cable to the shore.

Figure 2 illustrates an embodiment similar to the embodiment of figure 1, however provided With energy storage means in the form of a flywheel energy storage system arranged on the platform The flywheel energy storage system is coupled to both the wind mill and the wave generators and adapted for receiving and storing energy from both the wind mill and each of the wave generators.Figure 2 illustrates an embodiment similar to the embodiment of ure gure 1, however provided With energy storage means in the form of a fl ywheel energy storage system arranged on the platform The fl ywheel energy storage system is coupled to both the wind mill and the wave generators and adapted for receiving and storing energy from both the wind mill and each of the wave generators.

Figure 3 illustrates an embodiment wherein two energy generating plants of the type illu- strated in figure 1 are interconnected via an intennediate wave generator, arranged for capr- turing relative movement between the floating platform of the first palnt and the floating plat- form of the second plant. Only one intennediate wave generator is illustrated in the figure, but more than one may be used. The energy generated in the wave generator is transferred to ei- ther plant for further transfer to the shore grid. Figure 3 also indicates that further plants can be connected via further wave generators. Each such Wave generator is adapted to generate electrical energy fi°om the relative movements of each pair of interconnected plant platfonns, which platfonns are moved by the sea, waves and respective wind mill.Figure 3 illustrates an embodiment where two energy generating plants of the type illustrated in ure gure 1 are interconnected via an intennediate wave generator, arranged for capr- turing relative movement between the fl oating platform of the fi rst palnt and the fl oating platform of the second plant. Only one intennediate wave generator is illustrated in the fi gure, but more than one may be used. The energy generated in the wave generator is transferred to ei- ther plant for further transfer to the shore grid. Figure 3 also indicates that further plants can be connected via further wave generators. Each such Wave generator is adapted to generate electrical energy fi ° om the relative movements of each pair of interconnected plant platfonns, which platfonns are moved by the sea, waves and respective wind mill.

Figure 4 illustrates an embodiment of a power generating plant 2 having a vertical-axis wind turbine 1 and a wave generator 6. The wind mill 1 and the wave generator 6 are coupled to a common vertical generator axis and share the generator arranged in the platform 3.. This em- bodiment preferably includes an energy storing flywheel system 4. The anchor 5 secures the plant platform to the sea bed via the wave generator 6, similar to the anchors of the plants of gigures l-3.Figure 4 illustrates an embodiment of a power generating plant 2 having a vertical-axis wind turbine 1 and a wave generator 6. The wind mill 1 and the wave generator 6 are coupled to a common vertical generator axis and share the generator arranged in the platform 3 .. This em- bodiment preferably includes an energy storing fl ywheel system 4. The anchor 5 secures the plant platform to the sea bed via the wave generator 6, similar to the anchors of the plants of gigures l-3.

Figure 5 illustrates an embodiment wherein the wind mill turbine has a horizontal rotor axis.Figure 5 illustrates an embodiment where the wind mill turbine has a horizontal rotor axis.

And the turbine is coupled via a gear converting the horizontal rotation into a vertical recipro- cating motion of a piston. The vertical piston movement of the wind mill gear system is coupled to a linear generator. Also a wave generator capturing the relative motion between the platfonn and the seabed is arranged and coupled to the linear generator so that the vertical motions from the wind mill is operatively connected to the linear wave motion capturing ge- nerator and this same linear generator converts this motion from both energy sources into electrical energy.And the turbine is coupled via a gear converting the horizontal rotation into a vertical reciprocating motion of a piston. The vertical piston movement of the wind mill gear system is coupled to a linear generator. Also a wave generator capturing the relative motion between the platfonn and the seabed is arranged and coupled to the linear generator so that the vertical motions from the wind mill is operatively connected to the linear wave motion capturing ge- nerator and this same linear generator converts this motion from both energy sources into electrical energy.

The electrical energy generated by the plants illustrated in figures 1-5 are transferred to the shore via a respective electrical cable connected to a terminal on each platfonn. However the terrninals and the cables are not illustrated in the figures.The electrical energy generated by the plants illustrated in Figures 1-5 are transferred to the shore via a respective electrical cable connected to a terminal on each platform. However the terrninals and the cables are not illustrated in the fi gures.

The proposed embodiments of the invention have some noteable features: 1. It utilizes the floating platform of wind turbine as the main mover for the wave generator in one combination. 2. It enables the use of one generator (rotation and linear) for two different prime movers (wind and wave). 3. It enables to smoothen the power generation by utilizing potential uncorrelated fluctuations in wind and wave as well as utilizing energy storage in form of “fly-wheel”, having low speed with high inertia. 4. It utilizes common components for grid connection, e.g. switchgears, converters, transfonners, cables, line protections, etc.The proposed embodiments of the invention have some notable features: 1. It utilizes the fl oating platform of wind turbine as the main mover for the wave generator in one combination. 2. It enables the use of one generator (rotation and linear) for two different prime movers (wind and wave). 3. It enables to smoothen the power generation by utilizing potential uncorrelated ctu uctuations in wind and wave as well as utilizing energy storage in form of “fl y-wheel”, having low speed with high inertia. 4. It utilizes common components for grid connection, e.g. switchgears, converters, transfonners, cables, line protections, etc.

An idea of this invention is to thus combine wind turbine and wave power generators in one floating platform/construction, with or without energy storage system. By sharing one foot- print and one point of connection to the collection grid some benefits can be expected as: -Better utilization of space, higher energy generation density. No extra footprint needed when flowing wind turbine is combined with wave generator, since they are sharing the space verti- cally; thus the energy generation density (per area of power plant) is higher (compared to a system with solely a wind turbine or wave generator alone).An idea of this invention is to thus combine wind turbine and wave power generators in one platform oating platform / construction, with or without energy storage system. By sharing one foot- print and one point of connection to the collection grid some bene fi ts can be expected as: -Better utilization of space, higher energy generation density. No extra footprint needed when wing owing wind turbine is combined with wave generator, since they are sharing the space vertically; thus the energy generation density (per area of power plant) is higher (compared to a system with solely a wind turbine or wave generator alone).

-Fluctuations in wind power generation are not fully correlated with fluctuations in wave power generation so that the utilization of the collection grid and the transmission line can be higher, even without the implementation of energy storage (the utilization will be further enhanced with the implementation of energy storage).-Fluctuations in wind power generation are not fully correlated with fl uctuations in wave power generation so that the utilization of the collection grid and the transmission line can be higher, even without the implementation of energy storage (the utilization will be further enhanced with the implementation of energy storage).

- Less components per generation unit (potential sharing on generators, switching equipment, converters/transformers, etc.).- Less components per generation unit (potential sharing on generators, switching equipment, converters / transformers, etc.).

The proposed construction may be utilized to create some further benefits: 1. Cheaper overall electricity generation costs, especially for power plant owner and electrici- ty customers. 2. Smoother power generation outputs from renewable energy generations, thus better overall power system performance, especially for utility where the renewable power plant will be connected. 3. Utilisation of generators may be increased providing better overall economy when invest- ing in generator. Better pay-off for generators. 4. Also increased power generation for invested drives and other power system components for offshore power grid systems.The proposed construction may be utilized to create some further benefits: 1. Cheaper overall electricity generation costs, especially for power plant owner and electrici- ty customers. 2. Smoother power generation outputs from renewable energy generations, thus better overall power system performance, especially for utility where the renewable power plant will be connected. 3. Utilization of generators may be increased providing better overall economy when investing in generator. Better pay-off for generators. 4. Also increased power generation for invested drives and other power system components for offshore power grid systems.

Claims (11)

10 15 20 25 30 Claims10 15 20 25 30 Claims 1. An electrical power generating plant (2) comprising a platform (3), a wind turbine (1) and a wave power generator (6) in combination, which wind turbine is arranged on the platform and wave power generator is connected to the platform and adapted to extract energy from the movements of the platform.An electrical power generating plant (2) comprising a platform (3), a wind turbine (1) and a wave power generator (6) in combination, which wind turbine is arranged on the platform and wave power generator is connected to the platform and adapted to extract energy from the movements of the platform. 2. An electrical power generating plant (2) according to any of the previous claims, wherein the platform (3) is a floating platform.An electrical power generating plant (2) according to any of the previous claims, wherein the platform (3) is a ating oating platform. 3. An electrical power generating plant (2) according to any of the previous claims, wherein the wave power genearator (6) is arranged between the sea bed and the platfonn and adapted to extract energy from the movment of the platform in relation to the sea bed.An electrical power generating plant (2) according to any of the previous claims, wherein the wave power generator (6) is arranged between the sea bed and the platfonn and adapted to extract energy from the movment of the platform in relation to the sea bed. 4. An electrical power generating plant (2) according to any of the previous claims, wherein the wind turbine (1) is arranged vertically above the Wave power genearator (6).An electrical power generating plant (2) according to any of the previous claims, wherein the wind turbine (1) is arranged vertically above the Wave power generator (6). 5. An electrical power generating plant (2) according to any of the previous claims, said plant including an energy storage system (4) coupled to the wind turbine (1) or the wave power generator (6), or both (1, 6), to store energy hamessed by the wind turbine or the wave power generator, preferably said energy storage system (4) being a battery system, or altematively a fly wheel system (4) or a combination of battery system and fly wheel.5. An electrical power generating plant (2) according to any of the previous claims, said plant including an energy storage system (4) coupled to the wind turbine (1) or the wave power generator (6), or both (1, 6), to store energy hamessed by the wind turbine or the wave power generator, preferably said energy storage system (4) being a battery system, or altematively a fly wheel system (4) or a combination of battery system and fl y wheel. 6. An electrical power generating plant (2) according to any of the previous claims, said plant (2) comprises at least one cable terminal for electrical connection to an electrical cable, and being adapted for transferring electrical power that has been generated by plant by means of an electrical cable to a power transmission system such as a power grid.An electrical power generating plant (2) according to any of the previous claims, said plant (2) comprises at least one cable terminal for electrical connection to an electrical cable, and being adapted for transferring electrical power that has been generated by plant by means of an electrical cable to a power transmission system such as a power grid. 7. An electrical power generating plant (2) according to any of the previous claims, said plant includes means for anchoring the plant, especially the floating platform, such as an anchor.7. An electrical power generating plant (2) according to any of the previous claims, said plant includes means for anchoring the plant, especially the fl oating platform, such as an anchor. 8. An electrical power generating plant (2) according to any of the previous claims including a generator that is common to the wave power generator and the wind turbine. 10An electrical power generating plant (2) according to any of the previous claims including a generator that is common to the wave power generator and the wind turbine. 10 9. An electrical power generating plant (2) according to any of the previous claims, including at least one generator that is either dedictated for the wind turbine or the wave power genera- tor, especially one generator for the wind turbine and one generator for the wave power gen- erator.9. An electrical power generating plant (2) according to any of the previous claims, including at least one generator that is either dedicated to the wind turbine or the wave power generator, especially one generator for the wind turbine and one generator for the wave power gen- erator. 10. An electrical power generating plant (2) according to any of the previous claims 8 or 9, said generator being a rotating type of generator or linear generator.10. An electrical power generating plant (2) according to any of the previous claims 8 or 9, said generator being a rotating type of generator or linear generator. 11. An electrical power generating plant (2) according to any of the previous claims, the wind turbine being a horizontal-axis wind turbine or a vertical-axis wind turbine.11. An electrical power generating plant (2) according to any of the previous claims, the wind turbine being a horizontal-axis wind turbine or a vertical-axis wind turbine.
SE1100744A 2011-10-07 2011-10-07 Combination of wind and wave power plants with a common platform SE1100744A1 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103629051A (en) * 2013-11-25 2014-03-12 江苏大学 Deep ocean floating type wind power and wave energy hybrid grid-connected power generation method and device
GB2511272A (en) * 2012-03-13 2014-09-03 Norges Teknisk Naturvitenskapelige Uni A wind turbine
CN104989596A (en) * 2015-07-24 2015-10-21 中国华能集团清洁能源技术研究院有限公司 Combined power generation device with offshore wind power and ocean wave energy
CN105422375A (en) * 2015-12-11 2016-03-23 天津大学 Seawave generator platform with composite rotating wind power generation and flywheel energy storage functions
CN109804158A (en) * 2017-03-24 2019-05-24 马斯特重工业株式会社 Floating offshore wind power plant

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2511272A (en) * 2012-03-13 2014-09-03 Norges Teknisk Naturvitenskapelige Uni A wind turbine
CN103629051A (en) * 2013-11-25 2014-03-12 江苏大学 Deep ocean floating type wind power and wave energy hybrid grid-connected power generation method and device
CN104989596A (en) * 2015-07-24 2015-10-21 中国华能集团清洁能源技术研究院有限公司 Combined power generation device with offshore wind power and ocean wave energy
CN105422375A (en) * 2015-12-11 2016-03-23 天津大学 Seawave generator platform with composite rotating wind power generation and flywheel energy storage functions
CN109804158A (en) * 2017-03-24 2019-05-24 马斯特重工业株式会社 Floating offshore wind power plant

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