WO2010033068A1 - Floatable windpower plant - Google Patents

Floatable windpower plant Download PDF

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Publication number
WO2010033068A1
WO2010033068A1 PCT/SE2009/051001 SE2009051001W WO2010033068A1 WO 2010033068 A1 WO2010033068 A1 WO 2010033068A1 SE 2009051001 W SE2009051001 W SE 2009051001W WO 2010033068 A1 WO2010033068 A1 WO 2010033068A1
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WO
WIPO (PCT)
Prior art keywords
frame
accordance
oriented
frame structure
coordinated
Prior art date
Application number
PCT/SE2009/051001
Other languages
French (fr)
Inventor
Bertil Moritz
Original Assignee
Hm Power Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hm Power Ab filed Critical Hm Power Ab
Priority to EP09814845.5A priority Critical patent/EP2324244A4/en
Priority to CN200980136863.9A priority patent/CN102159832B/en
Publication of WO2010033068A1 publication Critical patent/WO2010033068A1/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
    • 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
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/02—Wind motors with rotation axis substantially parallel to the air flow entering the rotor  having a plurality of rotors
    • 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
    • F03D13/10—Assembly of wind motors; Arrangements for erecting wind motors
    • 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
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/93—Mounting on supporting structures or systems on a structure floating on a liquid surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/95—Mounting on supporting structures or systems offshore
    • 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

Definitions

  • the present invention generally refers to a floatable wind power plant and more specifically to a wind power plant, which is designed as a floating structure.
  • the latter refers to and is intended to be used in a system for creating prerequisites for generating electric power and electric energy from a prevailing force of a wind and the direction of the wind.
  • Systems of this type can then comprise a; individual but coordinated pontoon units which are floatable in a body of water, b; a plurality of, at least two, adjacent to each other oriented and coordinated wind turbines (wind-driven propellers), c; a mooring system solidly anchored to a restricted bottom area of said body of water, d; a gen- erator unit which may be driven by the rotational movement of wind turbines for generating said electric power, e; a cable section connected on the one hand to said generator unit and on the other hand to a land-based distribution network distributing generated electric power.
  • This invention has been created with the purpose of being applied with at least two of said pontoon units which may be coordinated with one carrier beam or similar, oriented such as horizontally, adapted to form and/or support a first frame structure which is vertically or substantially vertically oriented, to which frame structure and/or carrier beam said wind turbines are distributed, preferably sidewise-relatedly, and wherein at least a third one of said pontoon units is to be coordinated with a second horizontally or substantially horizontally oriented frame structure, wherein said first frame structure and said second frame structure are united to each other i.a. by means of associated frame portions.
  • a floatable wind power plant in the form of an individual structure related to a body of water is shown and described and more particularly a structure for creating prerequisites from a prevailing wind force and the direction of the wind for generating electric power.
  • the structure of the mentioned type comprises a; individual but mechanically coordinated pontoon units which are floatable in a body of water, b; a plurality of, at least two, adjacent to each other oriented and coordinated wind turbines (wind-driven propellers), c; a mooring system solidly anchored to a restricted bottom area of said body of water, d; a generator unit which may be driven by the rotational movements of one or more wind turbines for generating said electric power, and ⁇ ; a cable section connected on the one hand to said generator unit and on the other hand to a land- based distribution network distributing generated electric power.
  • said pontoon units are to be structured by and associated with at least two vertical or at least substantially vertical floatable posts for i.a. forming a first vertical frame structure.
  • a third pontoon unit Said two (three) post-shaped pontoon units are flexurally rigid in themselves and are furthermore adapted to be able to support vertically at least one horizontally oriented carrier beam structure, which is flexurally rigid in itself.
  • Such carrier beam structure is to be adapted and dimensioned such, that it will be able to support a plurality of said wind turbines horizontally.
  • Each one of said post-shaped pontoon units and said upright or third pontoon unit are mutually dimensioned and/or adapted such, with their lower partial portions Immersed in said body of water, as to retain the upper portions of said two frame structures floating over the surface of the water.
  • sais upright is to be laterally displaced by one plane, oriented through said first frame structure and said posts, with the upright being adapted over a second frame structure on the one hand to be able to cooperate rotatably rigidly with said first frame structure and on the other hand to be attached to and to be able to cooperate fixedly with said mooring system.
  • said pontoon units are to cooperate with a horizontally oriented carrier beam adapted to be included in, to form and/or to support a first vertically or substantially vertically oriented frame structure, to which frame structure and/or carrier beam said wind turbines are side-relatedly distributed, and wherein at least a third one of said pontoon units is coordinated with a second, horizontally or sub- sta ⁇ tially horizontally oriented frame structure, said first frame structure and said second frame structure being i.a. solidly connected to each other by means of associated frame portions.
  • first frame structure comprise points of attachment for wires, chains or similar means dimensioned for tractive forces and attached to the second frame structure.
  • the upper attachment point be comprised of the carrier beam structure and/or an upper area for the downwardly converging frame portions of the first frame structure.
  • the present invention takes the known technology of a floating wind power plant, indicated by way of introduction, such as in the form of a system related to a body of water for creating prerequisites from a prevailing wind force and direction of the wind for generating electric power, comprising a; individual but coordina- ted pontoon units which are floatable in a body of water, b; a plurality of, at least two, adjacent to each other oriented and coordinated wind turbines (wind-driven propellers), c; a mooring system solidly anchored to a restricted bottom area of said body of water, d; a generator unit which may be driven by the rotational movement of the wind turbines for generating said electric power, and e; a cable section connected on the one hand to said generator unit and on the other hand to a land-based distribution network distributing generated electric power.
  • a floating wind power plant indicated by way of introduction, such as in the form of a system related to a body of water for creating prerequisites from a prevailing wind force and direction of
  • the invention is based on that at least two of said pontoon units are coordinated with a horizontally oriented carrier beam or carrier beam structure a- dapted to form and/or support a first, a vertically or substantially vertically oriented fra- me structure, to which frame structure and/or carrier beam structure said turbines are side-reiatedly distributed, and wherein at least a third one of said pontoon units is coordinated with a second horizontally or substantially horizontally oriented frame structure, wherein said first frame structure and said second frame structure are mutually united by means of associated frame portions.
  • the present invention directs that said pontoon units belonging to the first frame structure are to be shaped as two downwardly converging frame portions or posts and that one pontoon unit belonging to the second frame structure is to be adapted to cooperate with a frame portion allotted to the second frame structure, such as converging frame portions facing away from the first frame structure.
  • said first frame structure with at least one horizontally oriented carrier beam and frame portions belonging to the pontoon units allotted to the frame structure, is to be oriented in one and the same pla- ne, such as a vertical plane.
  • the mentioned converging frame portions are to be allotted a mutual angle of less than 90° and more than 50°.
  • the mentioned converging frame portions can then be oriented and coordinated for forming a coordinated pointed portion.
  • the mentioned converging frame portions can then be coordinated with one or more carrier beams oriented over the water surface.
  • Said converging frame portions can then be coordinated by means of cross-wise positioned, for tractive forces dimensioned wires, bars, chains and/or cables or the like.
  • Said first frame structure can with its carrier beam embodiment be adapted to sturtly support individual pontoon units with the respective associated stationary fastening points oriented in an area of 10 - 30 % of the total length of the carrier beam, counted from one or both end surfaces of the carrier beam.
  • Said first frame structure is then to be attached to said second frame structure over the water surface by means of a stationary connection but, however, articulated connection around a horizontal axis of rotation.
  • said first frame structure is to be able to comprise fastening points for wires, bars, chains and/or cables or the like dimensioned for tractive forces, wherein said fastening points should be oriented above and below the indicated articulated con- nection.
  • the upper fastening point can then be comprised of the carrier beam and/or an upper area for the downwardly converging frame portions of the first frame structure.
  • Said second frame structure is, with the horizontally oriented frame portions be- longing to the pontoon unit, oriented in one and the same, such as horizontal, plane with and/or exhibits an external downwardly deflected frame portion.
  • Said converging frame portions can then be allotted a mutual angle of less than 65° and more than 40°.
  • Said converging frame portions with their deflected frame portions are oriented so as to form a coordinated pointed portion.
  • Said converging frame portions are adjacent to their deflected frame portion coordinated with a carrier beam oriented over the surface of the water.
  • Said converging frame portions are coordinated over diverging bars or cables dimensioned for tractive forces.
  • Said first frame structure comprises attachment points for wires, chains or similar means dimensioned for tractive forces and attached to the second frame structure.
  • Said fastening points are oriented at the same distance or at least substantially at the same distance above and below the articulated connection.
  • the upper fastening point comprises the carrier beam and/or an upper area for the downwardly converging frame portions of the first frame structure.
  • the present invention indicates that the converging portions or pontoon units allotted to the first frame structure are to be placed such, with regard to the wind turbines, that bracing can be carried out without interfering with said wind turbines.
  • Said carrier beam and said frame portion or frame portions allotted to the menti- oned second frame structure are to be oriented at such vertical height over a water level that a wave with an expected maximal high height can pass underneath.
  • the mooring system should exhibit a docking point under the surface of the water and coordinated with the second frame structure and with a buoy arrangement attached thereto. Said buoy arrangement is then to be adapted to support a submarine cable section for the land-based distribution network distributing generated electric power, which cable section is over a cable connector to be in electric connection with a cable section allotted to the second frame structure and/or the first frame structure.
  • a cable section can then be adapted to extend from docking points a distance along the second frame structure.
  • Structures of this type can then include i.a. a; individual but coordinated ponto- on units, which are floatable in a body of water, b; a plurality of, at least two, adjacent to each other oriented and coordinated, wind turbines (wind-driven propellers), c; a mooring system, solidly anchored to a restricted bottom area of said body of water, d; a generator unit, which may be driven by the rotational movement of the wind turbines for generating said electric power, and e: a cable section (or sections), connected on the one hand to said generator unit and on the other hand to a land-based distribution network distributing thus generated electric power.
  • two pontoon units belonging to a first frame structure, are to be shaped as downwardly converging frame portions or posts and that a pontoon unit or upright belonging to a second frame structure is to be adapted to co- operate at a distance with the second frame structure over an allotted frame portion, such as converging frame portions facing away from the first frame structure.
  • Figure 1 shows a first frame structure of a water-supported wind power plant or a structure in a front view and exposing two pontoons units or posts viewed in a direction from an eye of a wind allotted to the direction of the wind, in addition thereto
  • Figure 1a illustrates a proposed alternative with another converging angle and orientation of the two pontoon units or posts.
  • Figure 2 shows a larger part of the structure of Figure 1 in a perspective view, exhibiting the significant characteristics and features associated with the present invention, with a first vertical frame structure in rotatable cooperation with a second more horizontal frame structure.
  • Figure 3 shows the structure of Figures 1 and 2 in a side view and parallel to a prevailing direction of the wind and its eye of the wind, and
  • Figure 4 shows the structure according to Figures 1 and 2 in an interna! or side view iliustrating the existence of a docking point.
  • Pontoon unite concerns one or more vertical posts (1 , 2) and/or one or more uprights (3), with their lower portions immersed in a body of water.
  • the beam structure concerns a flexurally rigid beam with a structure, which can support a selected number of wind turbines and one or more generator units and which can enclose a system transferring a rotational movement.
  • a bar-shaped means, dimensioned for taking up compressive forces concerns a structure which primarily is dimensioned for being able to take up compressive forces, but which also can take up tractive forces.
  • a means, dimensioned for taking up tractive forces concerns a structure, which primarily is dimensioned for being able to take up tractive forces but with minor or no requirements of being able to take up compressive forces.
  • Figures 1 to 4 show a floatable wind power plant in the form of a wind force activating structure "A" related to a body of water for creating prerequisites for generating electric power in a generator "G” from a prevailing force of wind and direction of wind from an eye 1 W of the wind.
  • the structure "A” comprises a; individual but coordinated pontoon units 1 , 2 and (3), respectively, which are floatable in a body of water “V 1 b; a plurality of, at least two, adjacent to each other oriented and coordinated wind turbines 4, 4a, 4b, and 4c, respectively, (wind-driven propellers), c; a mooring system 11 M” solidly anchored to a restricted bottom area “B” of said body of water “V", d; a generator unit “G” which may be driven by the rotational movement of a turbine for generating said electric power, and e; a cable section "K” connected on the one hand to said generator unit and on the other hand to a land-based distribution network (not shown) distributing thus generated electric power.
  • At least two of said pontoon units in the form of posts 1 , 2 are coordinated with a horizontally oriented carrier beam structure 5 adapted to form and/or support a first, a vertically or substantially vertically oriented frame structure 21 , to which frame structure and/or carrier beam 5 said turbines are side-relatedly distributed, and wherein at least a third one of said pontoon units (3) is coordinated with a second, a horizontal or substantially horizontally oriented frame structure 22, wherein said first frame structure 21 and said second frame structure 22 are by means of associated frame portions firmly but ro- tatably united to each other around a horizontal axis 6' of rotation.
  • Said two pontoon units 1 , 2 are structured by and associated with at least two posts 1 ', 2', which are floatable per se, are vertical, or are at least substantially vertical, for, together with additional structural elements and means, forming said first frame structure 21 and with at least one upright (3) or pontoon unit, stabilizing the vertical position of a frame structure 21 in the body of water "V.
  • the present invention will in the following be described with two posts 1 ', 2' associated with pontoon units and one upright 3 associated with a pontoon unit it should be noted that this embodiment can be increased by more posts and uprights than are mentioned here and distributed in different manner than the ones which are shown here and are utilized as minimum requirements.
  • Said two posts V 1 2' associated with pontoon units are adapted to be able to support said horizontally oriented carrier beam structure 5, which is flexurally rigid in itself, said structure 5 being adapted and dimensioned such, that it can support said turbines 4, 4a, 4b, and 4c, respectively.
  • Each one of the two mentioned posts or pontoon units 1 , 2 and said upright 3, such as in Figure 2 are so dimensioned and/or adapted that with their lower portions 1a, 2a, 3a lowered into said body of water “V” they keep the frame structure 21 floating over the water surface "Va” and with said upright 3 being displaced sideways by a plane “P” oriented by said frame structure 21 and said two posts V 1 2'.
  • Said pontoon units 1 , 2 belonging to the first frame structure 21 are shaped as two downwardly converging frame portions 11 (1), 12 (2).
  • Said pontoon unit or upright 3 is adapted to cooperate with the second frame structure 22 over a frame portion (22a, 22b) or converging two frame portions 22a, 22b facing the first frame structure 21.
  • Said first frame structure 21 is, with its horizontally oriented carrier beam structure 5 and its frame portions or posts 1 ', 2' belonging to its pontoon unit, oriented in one and the same plane, such as said vertical plane "P".
  • Said converging frame portions 11, 12 or posts 1', 2' have a mutual angle "a" which is smaller than 90°, but normally bigger or larger than 50°, such as around 75°, in Figure 1.
  • Said converging frame portions 11, 12 are here oriented so as to form a coordinated pointed portion 13.
  • Said converging frame portions 11, 12 are here coordinated with a carrier beam 6 oriented over the water surface "Va".
  • the carrier beam 6 is horizontally oriented and located below the wind turbines fastened at half the length of the frame portions 11, 12.
  • Said converging frame portions 11", 12" are in Figure 1a alternative, coordinated by means of crossing bars or cables 14, 14a dimensioned for tractive forces.
  • Said first frame structure 21 with its first carrier beam 5 and its second carrier beam 6 is adapted to solidly support individual pontoon units 1 , 2, respectively, with and by, respectiveiy, associated fixed fastening points oriented within an area "b" of about 10 - 30 % of the total length of carrier beam 5, counted from one or both end surfaces 5a and 5b, respectiveiy, of carrier beam 5. It is particularly indicated that said first frame structure 21 is attached to said second frame structure 22 by means of stationary but articulated connections which here are designated 16, 17.
  • said first frame structure 21 is to comprise attachment points for wires, chains or similar dimensioned for tractive forces and extend- ing in a direction from the second frame structure 22 and towards the first frame structure 21
  • the upper attachment point "p1", '"p1"' for the wires 22a' and 22b', respectiveiy, comprises either the carrier beam 5 and/or an upper area for the downwardly converging frame portions of the first frame structure 21 or the posts 1 ', 2'.
  • the upright or pontoon unit 3 is adapted on the one hand to cooperate "rotata- bty rigidly" by using said wires, with said first frame portion 21 and on the other hand to be attached to and adheringly cooperate with said mooring system "M" via a docking point 7.
  • a “rotatably rigid” attachment and cooperation mean that the upright 3 and the post 1 ' (alternatively the post 2') are provided with a bar-shaped means 22a, (22b), which is rotatably fastened to post 1 at 16, wherein the rotatably rigid fastening is achieved by said means 22a', 22a" taking up tractive forces.
  • the structure "A" more specifically indicates that between said upright 3 and each one of the two posts, a first post 1' and a second post 2', there extends a bar-shaped means dimensioned for taking up pressure, one means 22a for the left post 1 ' and a similar means 22b for the right post 2'.
  • the first means 22a', 22b" and second means 22b', 22b", such as in the form of a wire with turnbuckles or similar, are fastened to the first 1 ' and second 2' post in known manner on one side each of the rotatable attachment 16 and 17, respectively, for the bar-shaped means 22a and 22b, respectively,
  • the bar-shaped means 22a, 22b are attached to their respective posts V and 2' within a defined middle area "c", which is oriented between the beam structure 5 and a water surface "Va” belonging to the body of water "V".
  • a beam structure 6 dimensioned primarily for compressive forces is adapted to cooperate fixedly with the two posts 1 ', 2' close to but above a surface of water "Va” belonging to the body of water.
  • One single generator unit “G” is adapted here by means of a system “S” transferring a rotational movement to be driven by only one or a plurality of turbines 4, 4a, 4b and 4c, respectively, allotted to the beam structure 5.
  • Said upright 3 or pontoon unit is adapted to be able to cooperate with and/or enclose a transformer unit "T” and a cable connection "KT
  • Said transformer unit "T” can then be positioned in such manner within or adjacent to upright 3 that it wiil serve as ballast for said upright 3.
  • Cooperating means 22a', 22a"; 22b', 22b"; taking up tractive forces and being in the form of cables are in cooperation with and in connection with bars 22a, 22b or the like taking up tractive forces to form a firm structure in the form of a triangle.
  • the number of wind turbines 4, 4a, 4b and 4c which are to be coordinated with the beam structure 5 is chosen to exceed two and usually fall below six, such as the in- dicated and illustrated number of four in the exemplifying embodiment.
  • All of the wind turbines 4, 4b; 4a, 4c are adapted for directly cooperating with the system "S" transferring the rotational motion for synchronous operation of the propellers.
  • the propellers of the individual tur- bines 4 - 4c are adapted to be able to overlap each other's surfaces of coverage 4', 4a', 4b' and 4c', respectively.
  • Said bar-shaped means 5, 6, 11, 12, 22a and 22b, respectively, which are dimensioned for taking up a compressive force, are structured as one or more pipe portions, one or more framework structures, for reducing the dead weight. More particularly, these should be designed with small or no ability to float and with a small actuation surface for wind and/or waves.
  • Said wind turbine and/or wind turbines are arranged and adapted to directly be able to cooperate with the system "S" transferring rotational movement without associ- ated gear boxes.
  • Said vertically oriented posts 1', 2' can then be associated with a circular or elliptical, or at least substantially circular or elliptical, cross section with its main axis or major axis oriented parallel to the lengthwise positioning 5' of the beam structure 5.
  • Each one of said posts 1 ', 2' and the upright 3 can be hollow so as to form a float, with a cylindrical or elliptical or other cross-sectional shape.
  • All of the turbines 4 - 4c are coordinated in one and the same or at least substantially one and the same vertical plane, such as a plane adjacent said plane "P", through the frame portion 21 and side-related beam structure 5 in the direction of the upright 3.
  • Said upright is adapted to take a vertical position over the actuation of ballast, and over means 2a', 22a", 22b', 22b" it exhibits a flexurally rigid attachment to said posts 1', 2'.
  • a chosen anchorage system "M” is adapted to exhibit a well-defined point of fixation 7.
  • Said point of fixation 7 is adapted to such depth "d” below the water surface "Va” that when the wind force increases and becomes higher, this point of fixation 7 will lower the upright 3 in such manner as to decrease the angular position of the pontoon unit and the frame portion 21 as related to said vertical plane "P".
  • Said beam structure 5 has the shape of an aperture profile and surrounds the mentioned system "S” transferring a rotational movement for driving one and the same generator unit "G", wherein said generator unit should be centrally positioned with regard to the beam structure 5.
  • the relevant platform or structure "A", according to Figures 1 and 2 has a allotted width, which is greater than 200 meters, and therefore occuring variations in wind speeds must be considered. This also leads to that rotating the platform will be neces- sary by other means so that it can be positioned in a best angle with regard to the main direction.
  • said second frame structure 22 with horizontally oriented frame portions 22a, 22b belonging to pontoon units is oriented in one and the same plane, such as a horizontal plane "PV with and/or exhibiting a lower downwardly deflected frame portion 23.
  • Said converging frame portions 22a, 22b are allotted a mutual angle "b" of Jess than 65° and more than 40°.
  • Said converging frame portions 22a, 22b with their deflected frame portion 23 are oriented so as to form a coordinated point-shaped portion 24 (13), whereas said converging frame portions 22a, 22b are adjacent to their deflected frame portion 23 coordinated with a carrier beam 25 oriented over the water surface 'Va".
  • Said first frame structure 21 comprises attachment points for wires, chains or similar means 22a', 22a", 22b', 22b" dimensioned for tractive forces and fastened to or adjacent to the external end portion 24 of the second frame structure 22.
  • the fastening points are here oriented at the same distance, or at least substantially the same distance, above and below the articulated connection 16, 17 of the carrier beam 6. According to the invention the possibility is indicated, that the converging frame portions or pontoon units associated with the first frame structure 21 can be placed such, with regard to the wind turbines, that bracing can occur without interfering with said wind turbines.
  • Said carrier beam 6 and said frame portion or frame portions allotted to the se- cond frame structure 22 can be oriented at such vertical height (h) over a level of water "Va" that an expected wave of high height can pass underneath.
  • the mooring system "M” exhibits a docking point 7 under the water surface "Va” and with a buoy arrangement 30 connected thereto coordinated with the second frame structure 22.
  • the buoy arrangement 30 is adapted to support a submarine cable section "K2" for the land-based distribution network which distributes generated electric power and which cable section "K2" is electrically connected over a cable connection "k1" to a cable section “K3" ("K1") allotted to the second frame structure 22 and/or to the first frame structure 21.
  • the cable secton "K3" is adapted to extend from docking points 7 a distance along the second frame structure 22.
  • an anchorage and a cable of this design can be installed irrespective of the floating unit.
  • This system simplifies a procedure of towing the unit to a harbour for maintenance by only disconnecting over the docking point 7.
  • the cable too, has a simpie plug arrangement.
  • the float, the buoy 30 can in connecting the unit cooperate with the external portion 24 so that waves do not subject the cable to strain.
  • This positioning "K4" of the cable is illustrated by a dashed line.
  • each shown unit and/or circuit can be com- bined with each other illustrated unit and/or circuit within the frame of being able to reach the desired technical function.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Wind Motors (AREA)

Abstract

This invention comprises a structure ("A") for creating, from a prevailing wind force ("W"), prerequisites for generating electric power, In the water carried structure ( ("A") It is suggested that among utilized pontoon units (1, 2, 3) at least two, in themselves cal, posts (1', 2'),and a beam structure (5) be coordinated for forming a first frame structure (21) and at feast one upright (3) stabilizing the first frame structure (21) position in the body of water included in a second frame structure (22). The Invention indicates that a triangular first frame structure (21) is to be in a stationary but around a horizontal turning shaft (6') rotatable connection (16, 17) with the second triangular frame structure (22).

Description

TITLE OF THE INVENTION: FLOATABLE WINDPOWER PLANT
TECHNICAL FIELD OF THE INVENTION
The present invention generally refers to a floatable wind power plant and more specifically to a wind power plant, which is designed as a floating structure.
With regard to the application of the invention, the latter refers to and is intended to be used in a system for creating prerequisites for generating electric power and electric energy from a prevailing force of a wind and the direction of the wind.
Systems of this type can then comprise a; individual but coordinated pontoon units which are floatable in a body of water, b; a plurality of, at least two, adjacent to each other oriented and coordinated wind turbines (wind-driven propellers), c; a mooring system solidly anchored to a restricted bottom area of said body of water, d; a gen- erator unit which may be driven by the rotational movement of wind turbines for generating said electric power, e; a cable section connected on the one hand to said generator unit and on the other hand to a land-based distribution network distributing generated electric power.
This invention has been created with the purpose of being applied with at least two of said pontoon units which may be coordinated with one carrier beam or similar, oriented such as horizontally, adapted to form and/or support a first frame structure which is vertically or substantially vertically oriented, to which frame structure and/or carrier beam said wind turbines are distributed, preferably sidewise-relatedly, and wherein at least a third one of said pontoon units is to be coordinated with a second horizontally or substantially horizontally oriented frame structure, wherein said first frame structure and said second frame structure are united to each other i.a. by means of associated frame portions.
BACKGROUND OF THE INVENTION Methods, arrangements and structures related to the above-mentioned techni- cai field and having a function and a character, which fulfil the posed requirements are known earlier in a plurality of different embodiments.
With regard to relevant systems it is known earlier to structure required pontoons or pontoon units so that the latter rest horizontally and floatingly on a surface of wa- ter or to structure them as floating vertical posts, such as with associated ballast or ballast-related arrangements.
As examples of the first-mentioned category the contents of the following patent publications may be mentioned, viz. NL-1008 318; EP-1 106 825-A2; US-6294 844-B1; DE-32 24 976-A1; DE-197 27330-A1; WO-00/58621-A1; DE-19846 796-A1, and WO- 02/073032-A1,
As examples of the last-mentioned category having vertical posts serving as pontoon units the contents of patent publications WO-2G05/G40604-A2 and WO-03/076 800-A2 may be mentioned.
If the basic prerequisites associated with the present invention are considered, the subject matter of patent publication WO-2007/009 464-A1 may also be noted as prior art, particularly Figures 1 and 2 shown therein.
Here a floatable wind power plant in the form of an individual structure related to a body of water is shown and described and more particularly a structure for creating prerequisites from a prevailing wind force and the direction of the wind for generating electric power.
The structure of the mentioned type comprises a; individual but mechanically coordinated pontoon units which are floatable in a body of water, b; a plurality of, at least two, adjacent to each other oriented and coordinated wind turbines (wind-driven propellers), c; a mooring system solidly anchored to a restricted bottom area of said body of water, d; a generator unit which may be driven by the rotational movements of one or more wind turbines for generating said electric power, and β; a cable section connected on the one hand to said generator unit and on the other hand to a land- based distribution network distributing generated electric power.
More particularly said pontoon units are to be structured by and associated with at least two vertical or at least substantially vertical floatable posts for i.a. forming a first vertical frame structure.
At any rate the existence of an upright or corresponding stabilizing the vertical position of the first frame structure in the body of water will be required, which however in the following will be designated as a third pontoon unit. Said two (three) post-shaped pontoon units are flexurally rigid in themselves and are furthermore adapted to be able to support vertically at least one horizontally oriented carrier beam structure, which is flexurally rigid in itself.
Such carrier beam structure is to be adapted and dimensioned such, that it will be able to support a plurality of said wind turbines horizontally.
Each one of said post-shaped pontoon units and said upright or third pontoon unit are mutually dimensioned and/or adapted such, with their lower partial portions Immersed in said body of water, as to retain the upper portions of said two frame structures floating over the surface of the water. Furthermore, sais upright is to be laterally displaced by one plane, oriented through said first frame structure and said posts, with the upright being adapted over a second frame structure on the one hand to be able to cooperate rotatably rigidly with said first frame structure and on the other hand to be attached to and to be able to cooperate fixedly with said mooring system. It is particularly indicated here that said pontoon units are to cooperate with a horizontally oriented carrier beam adapted to be included in, to form and/or to support a first vertically or substantially vertically oriented frame structure, to which frame structure and/or carrier beam said wind turbines are side-relatedly distributed, and wherein at least a third one of said pontoon units is coordinated with a second, horizontally or sub- staπtially horizontally oriented frame structure, said first frame structure and said second frame structure being i.a. solidly connected to each other by means of associated frame portions.
DISCLOSURE OF THE PRESENT INVENTION TECHNICAL PROBLEM
If the circumstance is considered, that the technical considerations which a person skilled in the relevant technical art must carry out in order to offer a solution to one or more given technical problems are on the one hand initially a necessary understanding of the meaures and/or the sequence of measures which are to be carried out and on the other hand a necessary choice of the one or more means which are required, the following technical problems should in consideration of this be relevant in producing the present subject of invention.
Considering the standpoint of earlier technology, as it has been described above, it should therefore be seen as a technical problem to be able to understand the sig- nificance of, the advantages related to and/or the technical measures and considerations which will be required for creating, in a floating wind power plant, a structure related to a body of water and more particularly as a structure for creating on the basis of a prevailing force of a wind prerequisites for generating electric power, to offer a light structu- re which can be based on utilizing two or more vertical posts serving as pontoon units, one or more vertical uprights or the like, also serving as pontoon units, one or more bar shaped means dimensioned for the specific taking up of compressive forces and a plurality of means dimensioned for the specific taking up of tractive forces so as to thereby offer the pontoon units associated with the first frame structure to be shaped as two downwardly converging frame portions with their lower partial portions surrounded by the body of water and with the upright or pontoon unit associated with the second frame structure being adapted to cooperate with the frame portions of the second frame structure such as converging frame portions facing away from the first frame structure.
There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations that will be required for Setting said first frame structure, with its horizontally oriented carrier beams and its frame portions or posts belonging to the pontoon units, be oriented in one and the same plane, such as a vertical plane or at least a substantially vertical plane.
There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations that will be required for letting converging frame portions belonging to the pontoon units be associated with a mutual angle field of less than 90° and more than 50°.
There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations that will be re- quired for letting said converging frame portions which are attached to the carrier beam be oriented so as to mutually form a coodinated pointed portion.
There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations that will be required for letting said converging frame portions of the carrier beam be coordinated with a carrier beam oriented over the surface of the water and the forming of the waves.
There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations that will be required for letting said converging frame portions be coordinated and stiffened over cross-wise positioned wires, bars, chains, and/or cables dimensioned for tractive forces. There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations that will be required for letting said first frame structure with its associated carrier beam structure be adapted to support solely an individual one of two pontoon units with the respective ones of associated fixed fastening points oriented within an area of 10 - 30% of the total length of the carrier beam, counting from the end surfaces of the carrier beam.
There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations that will be required for letting said first frame structure be attached to said second frame structure over a firm but around a horizontal rotational axis articulated connection.
There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations that will be required for letting said first frame structure comprise attachment points for wires, bars, chains, wires or the like, dimensioned for tractive forces. There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations that will be required for letting said attachment points be oriented above and below the horizontally articulated connection between the first frame structure and the second frame structure. There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations that will be required for letting an upper point of attachment be comprised of the structures of the carrier beam itself and/or an upper area for the downwardly converging frame portions of the first frame structure and/or pontoon units in the form of posts.
There is a technical probiem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations that will be required for letting said mentioned second frame structure with its horizontally oriented frame portions belonging to the pontoon unit be oriented in one and the same, such as horizontal, plane having an external deflected frame portion, such as fastened to a pontoon unit. There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations that will be required for letting said converging frane portions have a mutual angle of less than 65° and more than 40°.
There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations that will be required for letting said converging frame portions with their downwardly deflected frame portion be oriented so as to form a coordinated pointed ty shaped portion as a pontoon unit. There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations that will be required for letting said converging frame portions, adjacent to their deflected frame portion, be coordinated with a carrier beam oriented over the surface of the water and over an expected maximal wave height. There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations that will be required for letting said converging frame portions be coordinated over diverging bars or cables dimensioned for tractive forces.
There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations that will be required for letting said first frame structure comprise points of attachment for wires, chains or similar means dimensioned for tractive forces and attached to the second frame structure.
There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations that will be required for letting said fastening points be oriented at the same distance or at (east substantially the same distance over and below the fixed and articulated connection.
There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations that will be re- quired for letting the upper attachment point be comprised of the carrier beam structure and/or an upper area for the downwardly converging frame portions of the first frame structure.
There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations that will be re- quired for letting the converging frame portions allotted to the first frame structure or the pontoon units be positioned such, with regard to the wind turbines, that bracing can occur without interfering with said wind turbines.
There is a technical problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations that will be re- quired for letting said carrier beam and said frame portion or frame portions allotted to the second frame structure be oriented at such vertical height over a level of water that an expected high wave height can pass underneath.
There is a technical problem in being abie to understand the significance of, the advantages related to and/or the technical measures and considerations that will be required for Jetting the mooring system exhibit a docking point under the surface of the water and coordinated with the second frame structure and with a buoy arrangement attached thereto.
There is a technical problem in being able to understand the significance of, the advantages related to and/or the technicai measures and considerations that will be required for letting the buoy arrangement be adapted to support a submarine cable secti¬ on for the distribution network based on land and distributing generated electric power, said cable section being electrically connected over a cable connection to a cable section allotted to the second frame structure and/or the first frame structure. There is a technicai problem in being able to understand the significance of, the advantages related to and/or the technical measures and considerations that will be required for letting a cable section be adapted to extend from docking points a distance a- long the second frame structure.
THE SOLUTION
As its starting point the present invention takes the known technology of a floating wind power plant, indicated by way of introduction, such as in the form of a system related to a body of water for creating prerequisites from a prevailing wind force and direction of the wind for generating electric power, comprising a; individual but coordina- ted pontoon units which are floatable in a body of water, b; a plurality of, at least two, adjacent to each other oriented and coordinated wind turbines (wind-driven propellers), c; a mooring system solidly anchored to a restricted bottom area of said body of water, d; a generator unit which may be driven by the rotational movement of the wind turbines for generating said electric power, and e; a cable section connected on the one hand to said generator unit and on the other hand to a land-based distribution network distributing generated electric power.
Furthermore, the invention is based on that at least two of said pontoon units are coordinated with a horizontally oriented carrier beam or carrier beam structure a- dapted to form and/or support a first, a vertically or substantially vertically oriented fra- me structure, to which frame structure and/or carrier beam structure said turbines are side-reiatedly distributed, and wherein at least a third one of said pontoon units is coordinated with a second horizontally or substantially horizontally oriented frame structure, wherein said first frame structure and said second frame structure are mutually united by means of associated frame portions.
In a structure of the relevant type the present invention directs that said pontoon units belonging to the first frame structure are to be shaped as two downwardly converging frame portions or posts and that one pontoon unit belonging to the second frame structure is to be adapted to cooperate with a frame portion allotted to the second frame structure, such as converging frame portions facing away from the first frame structure.
As proposed embodiments, falling within the scope of the present invention, it is indicated that for said floatable wind power plant or structure, said first frame structure, with at least one horizontally oriented carrier beam and frame portions belonging to the pontoon units allotted to the frame structure, is to be oriented in one and the same pla- ne, such as a vertical plane.
The mentioned converging frame portions are to be allotted a mutual angle of less than 90° and more than 50°.
The mentioned converging frame portions can then be oriented and coordinated for forming a coordinated pointed portion. The mentioned converging frame portions can then be coordinated with one or more carrier beams oriented over the water surface.
Said converging frame portions can then be coordinated by means of cross-wise positioned, for tractive forces dimensioned wires, bars, chains and/or cables or the like. Said first frame structure can with its carrier beam embodiment be adapted to sturtly support individual pontoon units with the respective associated stationary fastening points oriented in an area of 10 - 30 % of the total length of the carrier beam, counted from one or both end surfaces of the carrier beam.
Said first frame structure is then to be attached to said second frame structure over the water surface by means of a stationary connection but, however, articulated connection around a horizontal axis of rotation.
Furthermore, said first frame structure is to be able to comprise fastening points for wires, bars, chains and/or cables or the like dimensioned for tractive forces, wherein said fastening points should be oriented above and below the indicated articulated con- nection.
The upper fastening point can then be comprised of the carrier beam and/or an upper area for the downwardly converging frame portions of the first frame structure.
Said second frame structure is, with the horizontally oriented frame portions be- longing to the pontoon unit, oriented in one and the same, such as horizontal, plane with and/or exhibits an external downwardly deflected frame portion.
Said converging frame portions can then be allotted a mutual angle of less than 65° and more than 40°.
Said converging frame portions with their deflected frame portions are oriented so as to form a coordinated pointed portion.
Said converging frame portions are adjacent to their deflected frame portion coordinated with a carrier beam oriented over the surface of the water.
Said converging frame portions are coordinated over diverging bars or cables dimensioned for tractive forces. Said first frame structure comprises attachment points for wires, chains or similar means dimensioned for tractive forces and attached to the second frame structure.
Said fastening points are oriented at the same distance or at least substantially at the same distance above and below the articulated connection.
The upper fastening point comprises the carrier beam and/or an upper area for the downwardly converging frame portions of the first frame structure.
Furthermore the present invention indicates that the converging portions or pontoon units allotted to the first frame structure are to be placed such, with regard to the wind turbines, that bracing can be carried out without interfering with said wind turbines.
Said carrier beam and said frame portion or frame portions allotted to the menti- oned second frame structure are to be oriented at such vertical height over a water level that a wave with an expected maximal high height can pass underneath.
It is particularly indicated that the mooring system should exhibit a docking point under the surface of the water and coordinated with the second frame structure and with a buoy arrangement attached thereto. Said buoy arrangement is then to be adapted to support a submarine cable section for the land-based distribution network distributing generated electric power, which cable section is over a cable connector to be in electric connection with a cable section allotted to the second frame structure and/or the first frame structure.
A cable section can then be adapted to extend from docking points a distance along the second frame structure.
ADVANTAGES
The advantages that primarily must be considered to be characterizing of the present invention and the specific significant characteristics indicated thereby are that in this manner prerequisites generating electric power have been created in a floatable wind power piant in the form of a structure, and from a prevailing wind force and direction of the wind.
Structures of this type can then include i.a. a; individual but coordinated ponto- on units, which are floatable in a body of water, b; a plurality of, at least two, adjacent to each other oriented and coordinated, wind turbines (wind-driven propellers), c; a mooring system, solidly anchored to a restricted bottom area of said body of water, d; a generator unit, which may be driven by the rotational movement of the wind turbines for generating said electric power, and e: a cable section (or sections), connected on the one hand to said generator unit and on the other hand to a land-based distribution network distributing thus generated electric power.
More specifically, it is indicated that two pontoon units, belonging to a first frame structure, are to be shaped as downwardly converging frame portions or posts and that a pontoon unit or upright belonging to a second frame structure is to be adapted to co- operate at a distance with the second frame structure over an allotted frame portion, such as converging frame portions facing away from the first frame structure.
The subject matter, that primarily is to be considered to be characterizing of the present invention, is disclosed in the characterizing portion of the foilowing claim 1.
SHORT DESCRIPTION OF THE DRAWINGS
A presently proposed embodiment, exhibiting the significant characteristics associated with the present invention, will now for exemplifying purposes be described more specifically with reference to the accompanying drawing, in which; Figure 1 shows a first frame structure of a water-supported wind power plant or a structure in a front view and exposing two pontoons units or posts viewed in a direction from an eye of a wind allotted to the direction of the wind, in addition thereto Figure 1a illustrates a proposed alternative with another converging angle and orientation of the two pontoon units or posts.
Figure 2 shows a larger part of the structure of Figure 1 in a perspective view, exhibiting the significant characteristics and features associated with the present invention, with a first vertical frame structure in rotatable cooperation with a second more horizontal frame structure.
Figure 3 shows the structure of Figures 1 and 2 in a side view and parallel to a prevailing direction of the wind and its eye of the wind, and
Figure 4 shows the structure according to Figures 1 and 2 in an interna! or side view iliustrating the existence of a docking point.
DEFINITIONS "Pontoon unite" concerns one or more vertical posts (1 , 2) and/or one or more uprights (3), with their lower portions immersed in a body of water.
The beam structure concerns a flexurally rigid beam with a structure, which can support a selected number of wind turbines and one or more generator units and which can enclose a system transferring a rotational movement. A bar-shaped means, dimensioned for taking up compressive forces concerns a structure which primarily is dimensioned for being able to take up compressive forces, but which also can take up tractive forces.
A means, dimensioned for taking up tractive forces concerns a structure, which primarily is dimensioned for being able to take up tractive forces but with minor or no requirements of being able to take up compressive forces.
DESCRIPTION OF EMBODIMENT NOW PROPOSED
By way of introduction it should be pointed out that in the following description of a presently proposed embodiment which exhibits the significant characteristics rela- ted to the invention and which is clarified by the figures shown in the foliowing drawings we have chosen words and a specific terminology with the purpose of thereby primarily clarifying the concept of the invention.
However, in this connection it should be noted that the terms chosen here are not to be seen as limiting solely to the expressions utilized and chosen here and it goes without saying that each such chosen term is to be chosen in such manner that it in addition comprises aii technical equivalents that work in the same manner or essentialiy the same manner in order to thereby achieve the same or substantially the same purpose and/or technical effect. Thus, with reference to the accompanying Figures 1 , 1a, 2, 3, and 4 not only is the present invention shown schematically and in detail but the significant peculiarities related to the invention have also been concretized by the now proposed and in the following more specifically described embodiment.
Thus, Figures 1 to 4, respectively, show a floatable wind power plant in the form of a wind force activating structure "A" related to a body of water for creating prerequisites for generating electric power in a generator "G" from a prevailing force of wind and direction of wind from an eye 1W of the wind.
In accordance with Figure 1 the structure "A" comprises a; individual but coordinated pontoon units 1 , 2 and (3), respectively, which are floatable in a body of water "V1 b; a plurality of, at least two, adjacent to each other oriented and coordinated wind turbines 4, 4a, 4b, and 4c, respectively, (wind-driven propellers), c; a mooring system 11M" solidly anchored to a restricted bottom area "B" of said body of water "V", d; a generator unit "G" which may be driven by the rotational movement of a turbine for generating said electric power, and e; a cable section "K" connected on the one hand to said generator unit and on the other hand to a land-based distribution network (not shown) distributing thus generated electric power.
At least two of said pontoon units in the form of posts 1 , 2 are coordinated with a horizontally oriented carrier beam structure 5 adapted to form and/or support a first, a vertically or substantially vertically oriented frame structure 21 , to which frame structure and/or carrier beam 5 said turbines are side-relatedly distributed, and wherein at least a third one of said pontoon units (3) is coordinated with a second, a horizontal or substantially horizontally oriented frame structure 22, wherein said first frame structure 21 and said second frame structure 22 are by means of associated frame portions firmly but ro- tatably united to each other around a horizontal axis 6' of rotation. Said two pontoon units 1 , 2 are structured by and associated with at least two posts 1 ', 2', which are floatable per se, are vertical, or are at least substantially vertical, for, together with additional structural elements and means, forming said first frame structure 21 and with at least one upright (3) or pontoon unit, stabilizing the vertical position of a frame structure 21 in the body of water "V. Even though the present invention will in the following be described with two posts 1 ', 2' associated with pontoon units and one upright 3 associated with a pontoon unit it should be noted that this embodiment can be increased by more posts and uprights than are mentioned here and distributed in different manner than the ones which are shown here and are utilized as minimum requirements.
Said two posts V1 2' associated with pontoon units are adapted to be able to support said horizontally oriented carrier beam structure 5, which is flexurally rigid in itself, said structure 5 being adapted and dimensioned such, that it can support said turbines 4, 4a, 4b, and 4c, respectively. Each one of the two mentioned posts or pontoon units 1 , 2 and said upright 3, such as in Figure 2, are so dimensioned and/or adapted that with their lower portions 1a, 2a, 3a lowered into said body of water "V" they keep the frame structure 21 floating over the water surface "Va" and with said upright 3 being displaced sideways by a plane "P" oriented by said frame structure 21 and said two posts V1 2'. Said pontoon units 1 , 2 belonging to the first frame structure 21 are shaped as two downwardly converging frame portions 11 (1), 12 (2).
Said pontoon unit or upright 3 is adapted to cooperate with the second frame structure 22 over a frame portion (22a, 22b) or converging two frame portions 22a, 22b facing the first frame structure 21. Said first frame structure 21 is, with its horizontally oriented carrier beam structure 5 and its frame portions or posts 1 ', 2' belonging to its pontoon unit, oriented in one and the same plane, such as said vertical plane "P".
Said converging frame portions 11, 12 or posts 1', 2' have a mutual angle "a" which is smaller than 90°, but normally bigger or larger than 50°, such as around 75°, in Figure 1.
Said converging frame portions 11, 12 are here oriented so as to form a coordinated pointed portion 13.
Said converging frame portions 11, 12 are here coordinated with a carrier beam 6 oriented over the water surface "Va". The carrier beam 6 is horizontally oriented and located below the wind turbines fastened at half the length of the frame portions 11, 12. Said converging frame portions 11", 12" are in Figure 1a alternative, coordinated by means of crossing bars or cables 14, 14a dimensioned for tractive forces.
Said first frame structure 21 with its first carrier beam 5 and its second carrier beam 6 is adapted to solidly support individual pontoon units 1 , 2, respectively, with and by, respectiveiy, associated fixed fastening points oriented within an area "b" of about 10 - 30 % of the total length of carrier beam 5, counted from one or both end surfaces 5a and 5b, respectiveiy, of carrier beam 5. It is particularly indicated that said first frame structure 21 is attached to said second frame structure 22 by means of stationary but articulated connections which here are designated 16, 17.
Furthermore it is indicated that said first frame structure 21 is to comprise attachment points for wires, chains or similar dimensioned for tractive forces and extend- ing in a direction from the second frame structure 22 and towards the first frame structure 21
Said attachment points are oriented above and below the articulated connection 16, 17, which Figure 2 has the purpose of illustrating. The wires have there been provided with reference designations 22a' and 22a" for the frame portion 22a and 22b' and 22b" for the frame portion 22b, respectiveiy.
The upper attachment point "p1", '"p1"' for the wires 22a' and 22b', respectiveiy, comprises either the carrier beam 5 and/or an upper area for the downwardly converging frame portions of the first frame structure 21 or the posts 1 ', 2'.
The upright or pontoon unit 3 is adapted on the one hand to cooperate "rotata- bty rigidly" by using said wires, with said first frame portion 21 and on the other hand to be attached to and adheringly cooperate with said mooring system "M" via a docking point 7.
A "rotatably rigid" attachment and cooperation mean that the upright 3 and the post 1 ' (alternatively the post 2') are provided with a bar-shaped means 22a, (22b), which is rotatably fastened to post 1 at 16, wherein the rotatably rigid fastening is achieved by said means 22a', 22a" taking up tractive forces.
The structure "A" more specifically indicates that between said upright 3 and each one of the two posts, a first post 1' and a second post 2', there extends a bar-shaped means dimensioned for taking up pressure, one means 22a for the left post 1 ' and a similar means 22b for the right post 2'.
The first means 22a', 22b" and second means 22b', 22b", such as in the form of a wire with turnbuckles or similar, are fastened to the first 1 ' and second 2' post in known manner on one side each of the rotatable attachment 16 and 17, respectively, for the bar-shaped means 22a and 22b, respectively,
The bar-shaped means 22a, 22b are attached to their respective posts V and 2' within a defined middle area "c", which is oriented between the beam structure 5 and a water surface "Va" belonging to the body of water "V". A beam structure 6 dimensioned primarily for compressive forces is adapted to cooperate fixedly with the two posts 1 ', 2' close to but above a surface of water "Va" belonging to the body of water.
One single generator unit "G" is adapted here by means of a system "S" transferring a rotational movement to be driven by only one or a plurality of turbines 4, 4a, 4b and 4c, respectively, allotted to the beam structure 5.
Said upright 3 or pontoon unit is adapted to be able to cooperate with and/or enclose a transformer unit "T" and a cable connection "KT
Said transformer unit "T" can then be positioned in such manner within or adjacent to upright 3 that it wiil serve as ballast for said upright 3. Cooperating means 22a', 22a"; 22b', 22b"; taking up tractive forces and being in the form of cables are in cooperation with and in connection with bars 22a, 22b or the like taking up tractive forces to form a firm structure in the form of a triangle.
The number of wind turbines 4, 4a, 4b and 4c which are to be coordinated with the beam structure 5 is chosen to exceed two and usually fall below six, such as the in- dicated and illustrated number of four in the exemplifying embodiment.
All of the wind turbines 4, 4b; 4a, 4c are adapted for directly cooperating with the system "S" transferring the rotational motion for synchronous operation of the propellers.
Over the mentioned synchronous operation the propellers of the individual tur- bines 4 - 4c are adapted to be able to overlap each other's surfaces of coverage 4', 4a', 4b' and 4c', respectively.
Said bar-shaped means 5, 6, 11, 12, 22a and 22b, respectively, which are dimensioned for taking up a compressive force, are structured as one or more pipe portions, one or more framework structures, for reducing the dead weight. More particularly, these should be designed with small or no ability to float and with a small actuation surface for wind and/or waves.
Said wind turbine and/or wind turbines are arranged and adapted to directly be able to cooperate with the system "S" transferring rotational movement without associ- ated gear boxes.
Said vertically oriented posts 1', 2' can then be associated with a circular or elliptical, or at least substantially circular or elliptical, cross section with its main axis or major axis oriented parallel to the lengthwise positioning 5' of the beam structure 5. Each one of said posts 1 ', 2' and the upright 3 can be hollow so as to form a float, with a cylindrical or elliptical or other cross-sectional shape.
Reducing the actuation and effect of a wave motion occurs by reducing the surface, which is intended to face the eye of the wind "W", where this surface can be a framework of known technology. All of the turbines 4 - 4c are coordinated in one and the same or at least substantially one and the same vertical plane, such as a plane adjacent said plane "P", through the frame portion 21 and side-related beam structure 5 in the direction of the upright 3.
Said upright is adapted to take a vertical position over the actuation of ballast, and over means 2a', 22a", 22b', 22b" it exhibits a flexurally rigid attachment to said posts 1', 2'.
A chosen anchorage system "M" is adapted to exhibit a well-defined point of fixation 7.
Said point of fixation 7 is adapted to such depth "d" below the water surface "Va" that when the wind force increases and becomes higher, this point of fixation 7 will lower the upright 3 in such manner as to decrease the angular position of the pontoon unit and the frame portion 21 as related to said vertical plane "P".
Said beam structure 5 has the shape of an aperture profile and surrounds the mentioned system "S" transferring a rotational movement for driving one and the same generator unit "G", wherein said generator unit should be centrally positioned with regard to the beam structure 5.
The relevant platform or structure "A", according to Figures 1 and 2, has a allotted width, which is greater than 200 meters, and therefore occuring variations in wind speeds must be considered. This also leads to that rotating the platform will be neces- sary by other means so that it can be positioned in a best angle with regard to the main direction.
With reference primarily to Figures 2 and 3, respectively, it is shown that said second frame structure 22 with horizontally oriented frame portions 22a, 22b belonging to pontoon units is oriented in one and the same plane, such as a horizontal plane "PV with and/or exhibiting a lower downwardly deflected frame portion 23.
Said converging frame portions 22a, 22b are allotted a mutual angle "b" of Jess than 65° and more than 40°. Said converging frame portions 22a, 22b with their deflected frame portion 23 are oriented so as to form a coordinated point-shaped portion 24 (13), whereas said converging frame portions 22a, 22b are adjacent to their deflected frame portion 23 coordinated with a carrier beam 25 oriented over the water surface 'Va".
Said first frame structure 21 comprises attachment points for wires, chains or similar means 22a', 22a", 22b', 22b" dimensioned for tractive forces and fastened to or adjacent to the external end portion 24 of the second frame structure 22.
The fastening points are here oriented at the same distance, or at least substantially the same distance, above and below the articulated connection 16, 17 of the carrier beam 6. According to the invention the possibility is indicated, that the converging frame portions or pontoon units associated with the first frame structure 21 can be placed such, with regard to the wind turbines, that bracing can occur without interfering with said wind turbines.
Said carrier beam 6 and said frame portion or frame portions allotted to the se- cond frame structure 22 can be oriented at such vertical height (h) over a level of water "Va" that an expected wave of high height can pass underneath.
With reference to Figure 4 it is illustrated that the mooring system "M" exhibits a docking point 7 under the water surface "Va" and with a buoy arrangement 30 connected thereto coordinated with the second frame structure 22. The buoy arrangement 30 is adapted to support a submarine cable section "K2" for the land-based distribution network which distributes generated electric power and which cable section "K2" is electrically connected over a cable connection "k1" to a cable section "K3" ("K1") allotted to the second frame structure 22 and/or to the first frame structure 21. The cable secton "K3" is adapted to extend from docking points 7 a distance along the second frame structure 22.
According to the embodiment of Figure 4 an anchorage and a cable of this design can be installed irrespective of the floating unit. This system simplifies a procedure of towing the unit to a harbour for maintenance by only disconnecting over the docking point 7.
The cable, too, has a simpie plug arrangement.
Furthermore, the float, the buoy 30 can in connecting the unit cooperate with the external portion 24 so that waves do not subject the cable to strain. This positioning "K4" of the cable is illustrated by a dashed line.
The invention is of course not limited to the embodiment disclosed above as an example and can be subject to modifications within the frame of the inventive concept illustrated in the following claims.
It should be particularly noted that each shown unit and/or circuit can be com- bined with each other illustrated unit and/or circuit within the frame of being able to reach the desired technical function.

Claims

1. A floatable wind power plant in the form of a structure related to a body of water for creating prerequisites from a prevailing wind force for generating electric energy, comprising; a; individual but coordinated pontoon units, which are floatable in a body of water, b; a plurality of, at least two, adjacent to each other oriented and coordinated, wind turbines (wind-driven propellers), c; a mooring system, solidly anchorable to a restricted bottom area of said body of water, d; a generator unit, which is to be driven by the rotational movement of the wind turbines for generating said electric power, e; a cable section, connected on the one hand to said generator unit and on the other hand to a land-based distribution network, wherein at least two of said pontoon units are coordinated with a horizontally oriented, or essentially horizontally oriented, carrier beam structure, adapted to form and/or support a first, a vertical or substantially vertically oriented, frame structure, to which first frame structure and/or carrier beam structure said turbines are side-relatedly distributed, and wherein at least a third one of said pontoon units is coordinated with a second frame structure oriented horizontally or substantially horizontally, wherein said first frame structure and said second frame structure are firmly attached to each other by means of associated frame portions, characterized in that the two mentioned pontoon unit, associated with the first frame structure, is shaped as two downwardly converging frame portions or posts and that said third pontoon unit, associated with the second frame structure or upright, is adapted to cooperate with the first frame structure over a stationary, but around an axis of rotation rotatable, attachment.
2. Structure in accordance with claim 1 , characterized in that said first frame portion comprising converging frame portions, said frame portions are facing away from the carrier beam structure.
3. Structure in accordance with claim 1 , characterized in that said first frame structure with a horizontally oriented carrier beam structure and frame portions associ- ated with the pontoon are oriented in one and the same plane, such as a vertical or essentially verticat plane.
4. Structure in accordance with any one of the preceding claims, characterized in that said converging frame portions are allotted an internal angle of less than 90° and more than 50°.
5. Structure in accordance with any one of the preceding claims, characterized in that said converging frame portions are oriented for forming a coordinated pointed portion or the like.
6. Structure in accordance with any one of the preceding claims, characterized in that said converging frame portions are coordinated with a carrier beam oriented over the surface of the water.
7. Structure in accordance with any one of the preceding claims, characterized in that said converging frame portions are coordinated over crosswise disposed bars or cables, dimensioned for tractive forces.
8, Structure in accordance with any one of the preceding claims, characterized in that said first frame structure and its carrier beam structure are adapted to firmly support individual pontoon units with respective ones of the associated fixed attachment points oriented in an area of 10 - 30 % of the total length of the carrier beam structure counted from an end surface allotted to said carrier beam.
9. Structure in accordance with any one of the preceding claims, particularly claim 2, characterized in that said first frame structure is fastened to said second frame structure over an articulated connection.
10. Structure in accordance with any one of the preceding claims, characterized in that said first frame structure is adapted to comprise attachment points for wires, chains or the like dimensioned for tractive forces.
11. Structure in accordance with any one of the preceding claims, such as claim 9 or 1O1 characterized in that said connections or attachment points are oriented over and/or under the articulated connection.
12. Structure in accordance with any one of the preceding claims, characterized in that said over or upper attachment point consists of the carrier beam structure and/or an upper area for the downwardly converging frame portions of the first frame structure.
13. Structure in accordance with any one of the preceding claims, particularly claim
1 or 2, characterized in that said second frame structure, having one or more horizon- tally oriented frame portions associated with the pontoon units, is oriented in one and the same, such as a horizontal, plane and exhibits an external downwardly deflected frame portion.
14. Structure in accordance with any one of the preceding claims, characterized in that said converging frame portions are allotted a mutual angle of less than 65° and more than 40°,
15. Structure in accordance with any one of the preceding claims, particularly claim 13, characterized in that said converging frame portions with their deflected frame portion are oriented for forming a coordinated pointed portion.
16. Structure in accordance with any one of the preceding claims, particularly claim 13, characterized in that said converging frame portions are adjacently to their down- wardly deflected frame portion coordinated with a carrier beam oriented over the surface of the water.
17. Structure in accordance with any one of the preceding claims, characterized in that said converging frame portions are coordinated over diverging bars or cables di- mensioned for tractive forces.
18. Structure in accordance with any one of the preceding claims, characterized in that said first frame structure comprises attachment points for wires, chains or similar means, dimensioned for tractive forces and attached to the second frame structure.
19. Structure in accordance with any one of the preceding claims, particulariy claim
18, characterized in that said attachment points are oriented at the same or at least substantially the same distance over and under the articulated connection.
20. Structure in accordance with any one of the preceding claims, particularly claim
18 or 19, characterized in that an upper attachment point consists of the carrier beam structure and/or an upper area for the downwardly converging frame portions of the first frame structure.
21. Structure in accordance with claim 1 , characterized in that the converging frame portions or pontoon units allotted to the first frame structure are positioned such with regard to the wind turbines that bracing can be carried out without interfering with said wind turbines.
22. Structure in accordance with claim 6, characterized in that said carrier beam and said frame portion or frame portions allotted to the second frame structure are oriented at such vertical height over a water level that an expected high wave height can pass underneath.
23 Structure in accordance with claim 1 , characterized in that the mooring system exhibits a docking point below the surface of the water coordinated with the second frame structure and with a buoy arrangement attached thereto,
24. Structure in accordance with claim 23, characterized in that the buoy arrangement is adapted to support a submarine cable section for the land-based distribution network distributing generated electric power and which cable section over a cable con¬ nection is in electric conncection with a cable section allotted to the second frame structure and/or the first frame structure.
25. Structure in accordance with claim 23, characterized in that a cable structure is adapted to extend from docking points a distance along the second frame structure.
PCT/SE2009/051001 2008-09-18 2009-09-08 Floatable windpower plant WO2010033068A1 (en)

Priority Applications (2)

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EP09814845.5A EP2324244A4 (en) 2008-09-18 2009-09-08 Floatable windpower plant
CN200980136863.9A CN102159832B (en) 2008-09-18 2009-09-08 Floatable windpower plant

Applications Claiming Priority (2)

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SE0801992A SE532886C8 (en) 2008-09-18 2008-09-18 Removable wind turbine (V-shape)
SE0801992-9 2008-09-18

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WO (1) WO2010033068A1 (en)

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Publication number Publication date
SE0801992A1 (en) 2010-03-19
SE532886C8 (en) 2010-06-01
EP2324244A1 (en) 2011-05-25
EP2324244A4 (en) 2013-12-25
CN102159832B (en) 2014-05-14
CN102159832A (en) 2011-08-17
SE532886C2 (en) 2010-04-27

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