US20090092449A1 - Anchoring arrangement for floating wind turbine installations - Google Patents

Anchoring arrangement for floating wind turbine installations Download PDF

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Publication number
US20090092449A1
US20090092449A1 US11/919,887 US91988706A US2009092449A1 US 20090092449 A1 US20090092449 A1 US 20090092449A1 US 91988706 A US91988706 A US 91988706A US 2009092449 A1 US2009092449 A1 US 2009092449A1
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US
United States
Prior art keywords
lines
floating cell
floating
arrangement
anchoring
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US11/919,887
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English (en)
Inventor
Dagfinn Sveen
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Hywind AS
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to NORSK HYDRO ASA reassignment NORSK HYDRO ASA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SVEEN, DAGFINN
Publication of US20090092449A1 publication Critical patent/US20090092449A1/en
Assigned to STATOIL ASA reassignment STATOIL ASA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NORSK HYDRO ASA
Assigned to HYWIND AS reassignment HYWIND AS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: STATOIL ASA
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
    • 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
    • F03D13/22—Foundations specially adapted for 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
    • 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
    • B63B2035/442—Spar-type semi-submersible structures, i.e. shaped as single slender, e.g. substantially cylindrical or trussed vertical bodies
    • 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
    • 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
    • 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 relates to an anchoring arrangement for a floating wind turbine installation, such wind turbine installation comprising a floating cell, a tower arranged over the floating cell, a generator mounted on the tower which is rotatable in relation to wind direction and fitted with a wind rotor, and an anchor line arrangement connected to anchors on the sea bed.
  • wind turbines are arranged such that the rotor faces the wind with the tower positioned downstream of the wind direction. This is to avoid the wind flow being disturbed before it passes through the rotor, which could otherwise lead to loss of energy and disruptive vibrations and impulses in the turbine.
  • Yawing is performed by a system which registers the wind direction and automatically drives the pinion by a motor to make the rotor turn into the direction of the wind.
  • Resistance to rotation is provided by anchor lines which are pre-tensioned by a specific force. When anchor lines are fixed directly to a slim cylindrical construction, then, as described below, this gives low resistance to rotation as the anchor line is connected near the rotation axis. Resistance to rotation occurs when the tower is rotated from its equilibrium position and a righting arm occurs as a function of angle ( ) and radius (r) from the rotation axis to the line fixing point.
  • the righting arm (a) is in this case:
  • the righting force corresponds to the normal component F n on the rotation axis of the pre-tension on the line, and the righting moment will then become:
  • the resistance moment against rotation is thus, as shown above, a sine function with a maximum at 90° (see below). At small angles of rotation the rotation resistance will act like a linear rotation spring.
  • the present invention provides a solution for anchoring a floating wind turbine installation by which it is possible to increase significantly the initial resistance to rotation round the vertical axis. It further provides a solution which is extremely simple and can be used for anchoring wind turbine installations in very deep water.
  • the invention is characterised in that the individual anchor lines, at a certain distance from the floating cell and at a fixing point on the individual anchor line, are each connected to at least two separate lines which slant outwards and are fixed to the floating cell in a delta-shaped arrangement, as indicated in the attached independent claim 1 .
  • FIG. 1 shows a perspective sketch of a floating wind turbine with an anchoring arrangement according to the present invention
  • FIG. 2 shows a skeleton sketch of the anchoring arrangement in relation to the invention shown in FIG. 1 and
  • FIG. 3 shows a diagram in which rotation resistance (rotation moment) is calculated on the basis of the rotation angle for a conventional anchor system compared with the present invention.
  • FIG. 1 shows a perspective sketch of a floating wind turbine installation 1 with an anchoring arrangement 6 according to the invention.
  • the wind turbine includes, apart from anchoring lines 11 , a preferably circular elongated floating cell 7 , a tower 8 mounted on the floating cell 7 , and on top of the tower a generator 9 which can be rotated in relation to wind direction, bearing a wind rotor 10 .
  • the elongated shape has been selected from a desire to achieve low displacement with good stability and thus minimal effect from wind and waves.
  • Weights 12 can further advantageously be arranged on the anchor lines to create the necessary tension in these.
  • anchor lines 11 have been used at intervals of 120°.
  • the individual anchor lines 11 are each fixed at one end to anchors or anchoring points on the sea bed (not shown), and at the other end, at a certain distance from the floating cell 7 at a fixing point 5 , they are connected to two lines 2 and 3 which slant outwards and are fixed to floating cell 7 at paired jointly arranged brackets. 4 .
  • Each of the anchor lines 11 forms with these a delta-shaped pattern or Y-shaped bifurcation at/towards the fixing point on floating cell 7 .
  • the length of lines 11 is relatively long, depending on the depth of the sea bed where the wind turbine is located, and the pre-tensioning in the individual anchor lines may be of the order of 1000 kN.
  • the lines' angle to the horizontal plane is approx. 30-70° and the length of the lines 2 , 3 , depending on the dimensions of the wind turbine installation and of the floating cell as a whole, may be of the order of 50 m.
  • FIG. 3 shows a diagram in which rotation resistance (rotation moment) is calculated on the basis of the rotation angle for a conventional anchor system compared with the present invention.
  • rotation resistance rotation moment
  • the critical angle for slack in one of the delta lines in the example calculated here is of the order of 6°.
  • the curve here changes direction at a moment upwards of 14000 kNm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • General Engineering & Computer Science (AREA)
  • Ocean & Marine Engineering (AREA)
  • Wind Motors (AREA)
US11/919,887 2005-05-06 2006-05-04 Anchoring arrangement for floating wind turbine installations Abandoned US20090092449A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NO20052261 2005-05-06
NO20052261A NO325261B1 (no) 2005-05-06 2005-05-06 Forankringsarrangement for flytende vindturbininstallasjoner.
PCT/NO2006/000164 WO2006121337A1 (fr) 2005-05-06 2006-05-04 Structure d’ancrage pour installation a turbine eolienne flottante

Publications (1)

Publication Number Publication Date
US20090092449A1 true US20090092449A1 (en) 2009-04-09

Family

ID=35277013

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/919,887 Abandoned US20090092449A1 (en) 2005-05-06 2006-05-04 Anchoring arrangement for floating wind turbine installations

Country Status (10)

Country Link
US (1) US20090092449A1 (fr)
EP (1) EP1881927B1 (fr)
JP (1) JP5011279B2 (fr)
KR (1) KR20080017337A (fr)
CN (1) CN101193792B (fr)
CA (1) CA2608233C (fr)
ES (1) ES2424834T3 (fr)
NO (1) NO325261B1 (fr)
PT (1) PT1881927E (fr)
WO (1) WO2006121337A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2636896A1 (fr) * 2010-11-05 2013-09-11 National Maritime Research Institute Amortisseur d'oscillation roulis-lacet d'une éolienne et éolienne flottante
US8641002B2 (en) 2011-05-20 2014-02-04 Art Hand Tower mounting apparatus
US10308328B2 (en) * 2014-07-01 2019-06-04 Aerodyn Engineering Gmbh Floating wind turbine with a floating foundation, and method for installation of such a wind turbine
GB2590508A (en) * 2019-12-20 2021-06-30 Sustainable Marine Energy Ltd Improved turret mooring system

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO325903B1 (no) * 2007-02-28 2008-08-11 Njord Floating Wind Power Platform As Nedvinds vindkraftverk og en fremgangsmate for drift av et nedvinds vindkraftverk
SE532886C8 (sv) * 2008-09-18 2010-06-01 Hm Power Ab Flytbart vindkraftverk (V-form)
CA2747541C (fr) 2008-12-18 2017-07-11 Single Buoy Moorings Inc. Eoliennes de haute mer amovibles dotees d'un systeme d'amarrage installe au prealable
US8192160B2 (en) 2010-09-01 2012-06-05 General Electric Company Wind turbine having variable height and method for operating the same
US9457873B2 (en) * 2010-12-21 2016-10-04 Lockheed Martin Corporation On-site fabricated fiber-composite floating platforms for offshore applications
WO2012107045A2 (fr) 2011-02-10 2012-08-16 Per Uggen Ancre ou ensemble d'amarrage permettant de réguler activement la direction de fondations flottantes équipées d'au moins deux turbines éoliennes, afin d'être capable de maintenir ou d'orienter les fondations flottantes vers la meilleure direction du vent actuelle
KR101338122B1 (ko) * 2012-11-01 2013-12-06 한국해양과학기술원 수동형 요잉 감쇠장치가 구비된 부유식 풍력 발전기
FR3074138B1 (fr) 2017-11-29 2021-08-27 Saipem Sa Structure de support flottant pour eolienne offshore et procede d'installation d'une eolienne munie d'une telle structure de support
GB2597761B (en) * 2020-08-04 2022-11-16 Equinor Energy As Mooring system for floating wind turbine
FR3139794A1 (fr) 2022-09-21 2024-03-22 Saipem S.A. Structure de support flottant à multiples colonnes centrales pour éolienne offshore et procédé d’assemblage d’une telle structure

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2388171A (en) * 1944-07-13 1945-10-30 Edward W Mcvitty Floating breakwater for seaplanes, flying boats, and for other uses
US3082608A (en) * 1960-05-30 1963-03-26 Intercontinental Marine Dev Lt Marine platform
US3572043A (en) * 1969-02-24 1971-03-23 Ernest A Clara Underwater structure
US3837308A (en) * 1971-05-24 1974-09-24 Sanders Associates Inc Floating power plant
US4155673A (en) * 1977-05-26 1979-05-22 Mitsui Engineering & Shipbuilding Co. Ltd. Floating structure
US5404868A (en) * 1992-03-31 1995-04-11 Vedanta Society Of Western Washington Apparatus using a balloon supported reflective surface for reflecting light from the sun
US5476059A (en) * 1994-12-20 1995-12-19 Imodco, Inc. Turret drive mechanism
US6182763B1 (en) * 1996-08-27 2001-02-06 Den Norske Stats Oljeselskap A.S. Subsea module
US20050229836A1 (en) * 2002-05-22 2005-10-20 Eystein Borgen Device for a wind power station placed in deep water
US20060269362A1 (en) * 2003-05-21 2006-11-30 Henriksen Svein D Arrangement for anchoring a floating structure

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2278562A1 (fr) * 1973-12-21 1976-02-13 Petroles Cie Francaise Perfectionnement aux ancrages de structures flottantes
EP0387445A3 (fr) * 1989-03-16 1991-03-20 Chu Associates Inc Antenne monopole
DE10056857B4 (de) * 1999-11-18 2004-05-27 They, Jan, Dr. rer. nat. Verankerungsstabilisierte Trägerboje
JP4743953B2 (ja) * 2000-12-18 2011-08-10 三井造船株式会社 浮体式風力発電装置及びその設置方法
EP1270848B1 (fr) * 2001-06-24 2006-09-13 Joachim Falkenhagen Affaiblissement souple avec des câbles pour bâtiments maritimes

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2388171A (en) * 1944-07-13 1945-10-30 Edward W Mcvitty Floating breakwater for seaplanes, flying boats, and for other uses
US3082608A (en) * 1960-05-30 1963-03-26 Intercontinental Marine Dev Lt Marine platform
US3572043A (en) * 1969-02-24 1971-03-23 Ernest A Clara Underwater structure
US3837308A (en) * 1971-05-24 1974-09-24 Sanders Associates Inc Floating power plant
US4155673A (en) * 1977-05-26 1979-05-22 Mitsui Engineering & Shipbuilding Co. Ltd. Floating structure
US5404868A (en) * 1992-03-31 1995-04-11 Vedanta Society Of Western Washington Apparatus using a balloon supported reflective surface for reflecting light from the sun
US5476059A (en) * 1994-12-20 1995-12-19 Imodco, Inc. Turret drive mechanism
US6182763B1 (en) * 1996-08-27 2001-02-06 Den Norske Stats Oljeselskap A.S. Subsea module
US20050229836A1 (en) * 2002-05-22 2005-10-20 Eystein Borgen Device for a wind power station placed in deep water
US20060269362A1 (en) * 2003-05-21 2006-11-30 Henriksen Svein D Arrangement for anchoring a floating structure

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2636896A1 (fr) * 2010-11-05 2013-09-11 National Maritime Research Institute Amortisseur d'oscillation roulis-lacet d'une éolienne et éolienne flottante
EP2636896A4 (fr) * 2010-11-05 2014-12-31 Nat Maritime Res Inst Amortisseur d'oscillation roulis-lacet d'une éolienne et éolienne flottante
US9879649B2 (en) 2010-11-05 2018-01-30 National Institute Of Maritime, Port And Aviation Technology Floating offshore wind turbine
US11242837B2 (en) 2010-11-05 2022-02-08 National Institute Of Maritime, Port And Aviation Technology Floating offshore wind turbine
US8641002B2 (en) 2011-05-20 2014-02-04 Art Hand Tower mounting apparatus
US10308328B2 (en) * 2014-07-01 2019-06-04 Aerodyn Engineering Gmbh Floating wind turbine with a floating foundation, and method for installation of such a wind turbine
GB2590508A (en) * 2019-12-20 2021-06-30 Sustainable Marine Energy Ltd Improved turret mooring system
GB2590508B (en) * 2019-12-20 2021-12-22 Sustainable Marine Energy Ltd Improved turret mooring system

Also Published As

Publication number Publication date
NO20052261L (no) 2006-11-07
WO2006121337A1 (fr) 2006-11-16
CA2608233A1 (fr) 2006-11-16
JP2008540902A (ja) 2008-11-20
CN101193792B (zh) 2011-04-13
PT1881927E (pt) 2013-08-27
EP1881927A4 (fr) 2011-01-19
CA2608233C (fr) 2011-03-29
NO20052261D0 (no) 2005-05-06
CN101193792A (zh) 2008-06-04
JP5011279B2 (ja) 2012-08-29
EP1881927A1 (fr) 2008-01-30
KR20080017337A (ko) 2008-02-26
ES2424834T3 (es) 2013-10-09
NO325261B1 (no) 2008-03-17
EP1881927B1 (fr) 2013-07-17

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AS Assignment

Owner name: NORSK HYDRO ASA, NORWAY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SVEEN, DAGFINN;REEL/FRAME:020568/0072

Effective date: 20071109

AS Assignment

Owner name: STATOIL ASA, NORWAY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:NORSK HYDRO ASA;REEL/FRAME:031547/0984

Effective date: 20120625

AS Assignment

Owner name: HYWIND AS, NORWAY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:STATOIL ASA;REEL/FRAME:031649/0799

Effective date: 20130508

STCB Information on status: application discontinuation

Free format text: ABANDONED -- AFTER EXAMINER'S ANSWER OR BOARD OF APPEALS DECISION