EP2373886A2 - Position de repos d'une eolienne - Google Patents

Position de repos d'une eolienne

Info

Publication number
EP2373886A2
EP2373886A2 EP09805996A EP09805996A EP2373886A2 EP 2373886 A2 EP2373886 A2 EP 2373886A2 EP 09805996 A EP09805996 A EP 09805996A EP 09805996 A EP09805996 A EP 09805996A EP 2373886 A2 EP2373886 A2 EP 2373886A2
Authority
EP
European Patent Office
Prior art keywords
rotor
blade
blades
angle
rotor blade
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.)
Withdrawn
Application number
EP09805996A
Other languages
German (de)
English (en)
Inventor
Sönke Siegfriedsen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aerodyn Engineering GmbH
Original Assignee
Aerodyn Engineering GmbH
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 Aerodyn Engineering GmbH filed Critical Aerodyn Engineering GmbH
Publication of EP2373886A2 publication Critical patent/EP2373886A2/fr
Withdrawn legal-status Critical Current

Links

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
    • F03D7/00—Controlling wind motors 
    • F03D7/02—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • F03D7/022—Adjusting aerodynamic properties of the blades
    • F03D7/0224—Adjusting blade pitch
    • 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
    • F03D7/00—Controlling wind motors 
    • F03D7/02—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • F03D7/0264—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor for stopping; controlling in emergency situations
    • F03D7/0268—Parking or storm protection
    • 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
    • F05B2250/00—Geometry
    • F05B2250/30—Arrangement of components
    • F05B2250/33—Arrangement of components symmetrical
    • 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
    • F05B2260/00—Function
    • F05B2260/30—Retaining components in desired mutual position
    • F05B2260/301—Retaining bolts or nuts
    • 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
    • F05B2260/00—Function
    • F05B2260/70—Adjusting of angle of incidence or attack of rotating blades
    • F05B2260/74—Adjusting of angle of incidence or attack of rotating blades by turning around an axis perpendicular the rotor centre line
    • 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
    • F05B2260/00—Function
    • F05B2260/90—Braking
    • F05B2260/901—Braking using aerodynamic forces, i.e. lift or drag
    • 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
    • F05B2260/00—Function
    • F05B2260/90—Braking
    • F05B2260/902—Braking using frictional mechanical forces
    • 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
    • F05B2270/00—Control
    • F05B2270/10—Purpose of the control system
    • F05B2270/109—Purpose of the control system to prolong engine life
    • F05B2270/1095—Purpose of the control system to prolong engine life by limiting mechanical stresses
    • 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

Definitions

  • the invention relates to a method for bringing a two-bladed rotor of a wind turbine into a parking position.
  • wind turbines are particularly at risk in areas with high extreme winds, especially seasonal winds and hurricanes, such as hurricanes or typhoons, which also have high turbulence.
  • EP 0 709 571 A2 discloses a wind turbine with a two-bladed rotor which has rotor blades with rotor blade sections that rotate freely relative to one another, so that on the one hand the entire rotor can be aligned parallel to the wind direction or at least the load acting on the rotor can be reduced in the case of a frontal flow ,
  • a disadvantage of this design is the very complex sheet structure, which is complicated and prone to high wind loads.
  • DE 101 41 098 Al dispenses entirely with braking and locking of the rotor. Rather, the rotor is unbraked there and not locked in a rotational position be stabilized in that the turbulence-induced migration of the rotor from the parking position is prevented by adjusting the rotor blades in a rotational movement counteracting position. The control should cause such a "spin" of the rotor without leaving the parking position.
  • the object of the invention is therefore to reduce the loads occurring in a wind turbine with a braked and locked rotor such that they can withstand turbulent flows sufficiently.
  • the basic idea of the invention is to bring the two-bladed rotor of a wind power plant by braking into a parking position in which the rotor blades are aligned horizontally.
  • the rotor is locked by means of locking form-locking, wherein the Locking means particularly preferably designed as engaging in Arretierfactn engaging hydraulically driven locking pin.
  • the sheets are also aligned with each other in their pitch angle to the longitudinal axis, that takes into account the inclination of the rotor axis and the aerodynamic properties of the blades on the rotor axis a minimum of torque and, if possible, a minimum acting on the blade roots loads.
  • the self-weight moments on the blade flanges should be present as the mean load value.
  • the sheets are to be aligned with each other in their pitch angle to the longitudinal axis, so that leaf buoyancy forces are generated, which compensate (in time average), the dead weight of the leaves.
  • These buoyancy forces should preferably also counteract the pitching moment generated by the inclination of the rotor axis.
  • a control which controls the brake pressure of the rotor brake via a pressure regulating valve such that the rotational speed of the rotor is braked by the angular and / or position detection of the rotor in such a way that the rotor comes to a standstill in the horizontal parking position. Then a test device is used, which checks the accuracy of the approached position. In a position in which the locking means can not engage in their cooperating with these recordings, the controller releases the rotor again, whereupon the rotor can rotate again and a new braking and testing process is triggered. On the other hand, if the approached position coincides with the predetermined tolerances, locking pins are preferably retracted into locking receptacles which engage the. Lock the rotor in its horizontal position by positive engagement.
  • the rotor of the two-bladed rotor wind turbine is spent by controlled target braking in a horizontal parking position, braked and preferably locked by inserting hydraulically operated bolts in therefor provided on the rotor shots. Then the rotor blades are each in one of the Achsne Trent the rotor axis of the wind turbine and the aerodynamic properties of the blade when it flows from below and from above dependent position, in which these preferably stay permanently.
  • the blade angles of the two blades are different due to their usually asymmetrical design with respect to the chord of the blade.
  • the wind turbine is designed as a leeward rotor and is braked in a horizontal position, and the yaw brake (s) is released and the yaw motors decoupled, i. the output teeth of the Yaw motor to avoid overspeed no longer engaged with the toothed ring gear arranged on the tower, an independent tracking of the rotor can be done at Wmd therapiess capableung. This ensures that the leaves are not flown by the side and can develop only small buoyancy forces.
  • Advantage of the system according to the invention is that can be dispensed with moving parts to regulate the parking position and thus required during parking position systems for generating auxiliary power.
  • the wind turbine according to the invention is subject to less wear compared to conventional systems and, compared to these, also has a higher stability and safety.
  • FIG. 1 is a sectional view of an aerodynamic profile of a rotor blade of a wind turbine
  • FIG. 2 is a graph illustrating the lift coefficients (CL) versus the angle of attack of a profile
  • Fig. 3 is a schematic, cut in different planes of the sheet
  • 5a is a perspective view of a wind turbine after the
  • FIG. 5b is a front view of the wind turbine of Fig. 5a;
  • 6a shows a side view of a wind energy plant with a two-twin rotor
  • FIG. 6b shows a profile section of the one sheet of the wind energy plant at approximately half the length of the sheet
  • Fig. 6c is a profile section of the other sheet of the wind turbine at approximately half the sheet length
  • Fig. 8a is a diagram for a two-bladed rotor of a conventional
  • Wind energy plant represents the load of the rotor axis with the torque MZR over time
  • Fig. 8b is a diagram illustrating the application of the method according to the invention, the load of the rotor axis of a two-bladed rotor with the torque MZR over time.
  • Fig. 1 shows a schematic sectional view of an aerodynamic profile 10.
  • the tlotorblattprofil 10 is constructed asymmetrically with respect to its chord - it is clear ⁇ u recognize that the top 12 of the profile 10 is shaped differently than the bottom 14.
  • the angle ⁇ denotes the here Angle between the flow and the chord, wherein the chord is the straight line connecting the nose point and the edge of the profile.
  • FIG. 2 shows that a different flow angle ⁇ in asymmetrically shaped profiles leads to different profile lift coefficients CL.
  • ⁇ n angle ⁇ of -4 ° leads to a more than half lower buoyancy force than an inflow angle ⁇ of + 4 °.
  • Fig. 3 shows schematically the forming along the axis of a rotor blade different profiles, wherein the profiles are formed at the blade tip thinner than at the blade root and the profiles are wound against each other.
  • FIG. 4 shows a second diagram for illustrating the torque MZ R acting on the rotor axis as a function of the blade pitch angle ⁇ , ie the angle between the optimum production position and the rotor plane (which is defined as 0 °), with constant flow.
  • FIG. 5a and 5b show a wind energy plant according to the invention with the rotor braked and locked in the parking position according to the invention.
  • the wind turbine 100 is equipped with a two-bladed rotor 20. It can clearly be seen that the rotor 20 is brought into a horizontal position.
  • the wind turbine 100 is shown in a coordinate system with an x, y and z axis.
  • the R point denotes the intersection of the y and z axes
  • the T point denotes the intersection of the x and z axes.
  • Fig. 5b shows the wind turbine of Fig. 5a in a frontal view, wherein - as will be described in the following to Fig. 7 - the blade position of left rotor blade 30 and right rotor blade 40 is different from each other.
  • FIG. 6 schematic side view of the wind turbine 100 of FIG. 5 illustrates the blade angle position of left rotor blade 30 and right rotor blade 40 in conventionally operated plants.
  • z denotes the rotor axis
  • the angle ⁇ the inclination of the rotor axis to the horizontal
  • ⁇ the blade angle to the rotor axis a vertically standing on the rotor axis.
  • Fig. 7 now shows the setting of the two rotor blades when using the method according to the invention.
  • the two blades 30 and 40 are set to one another such that there is a minimum of torque on the rotor axis and a minimum of stress on the rotor blade flanges through the rotor blades.
  • the sheet pitch for the sheet 30 shown in FIG. 7b is between 92 ° and 95 °
  • the sheet pitch for the other sheet 40 of FIG. 7c is between 88 ° and 85 °.
  • FIG. 8 clearly shows the load distribution on the rotor axis which has been improved by the method according to the invention by means of graphs representing the load of the rotor axis (the torque MZR) of a twin-blade rotor over time.

Landscapes

  • 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)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Wind Motors (AREA)

Abstract

L'invention concerne un procédé pour installer un rotor à deux pales d'une éolienne dans une position de stationnement qui est caractérisé par une orientation des pales de rotor dans un plan horizontal et un freinage du rotor.
EP09805996A 2009-01-02 2009-12-03 Position de repos d'une eolienne Withdrawn EP2373886A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009004070A DE102009004070A1 (de) 2009-01-02 2009-01-02 Windenergieanlage
PCT/DE2009/001727 WO2010075833A2 (fr) 2009-01-02 2009-12-03 Éolienne

Publications (1)

Publication Number Publication Date
EP2373886A2 true EP2373886A2 (fr) 2011-10-12

Family

ID=42234709

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09805996A Withdrawn EP2373886A2 (fr) 2009-01-02 2009-12-03 Position de repos d'une eolienne

Country Status (5)

Country Link
US (1) US8704391B2 (fr)
EP (1) EP2373886A2 (fr)
CN (1) CN102301131B (fr)
DE (1) DE102009004070A1 (fr)
WO (1) WO2010075833A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK177278B1 (en) 2011-05-19 2012-09-17 Envision Energy Denmark Aps A wind turbine and associated control method
JP6025869B2 (ja) * 2012-12-19 2016-11-16 三菱重工業株式会社 風車及びその運転方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4561826A (en) * 1983-03-10 1985-12-31 Taylor Derek A Vertical axis wind turbines
EP0709571A3 (fr) 1994-10-25 1996-12-11 Autoflug Energietech Gmbh Position de repos à faible charge pour éolienne
US5746576A (en) * 1996-10-15 1998-05-05 World Power Technologies, Inc. Wind energy conversion device with angled governing mechanism
US6441507B1 (en) * 2000-03-22 2002-08-27 The Wind Turbine Company Rotor pitch control method and apparatus for parking wind turbine
US20020067274A1 (en) * 2000-12-05 2002-06-06 Haller Mark E. Wind turbine hailstorm protection system having a hailstorm sensor to signal for changing turbine blade positions
DE10141098A1 (de) 2001-08-22 2003-03-06 Gen Electric Windkraftanlage
DE10162942A1 (de) 2001-12-20 2003-07-03 Gen Electric Verfahren zum Betreiben einer Windkraftanlage und Windkraftanlage
DE102004013624A1 (de) * 2004-03-19 2005-10-06 Sb Contractor A/S Verfahren zum Betreiben einer Windenergieanlage und Windenergieanlage
DE102007058746A1 (de) 2007-06-18 2008-12-24 Hanning & Kahl Gmbh & Co. Kg Arretierungsvorrichtung für eine Windturbine
DE102007045437A1 (de) * 2007-09-22 2009-04-02 Nordex Energy Gmbh Verfahren zur Steuerung einer Windenergieanlage

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010075833A2 *

Also Published As

Publication number Publication date
US8704391B2 (en) 2014-04-22
WO2010075833A2 (fr) 2010-07-08
WO2010075833A3 (fr) 2011-04-14
US20110248501A1 (en) 2011-10-13
CN102301131B (zh) 2014-04-09
DE102009004070A1 (de) 2010-07-08
CN102301131A (zh) 2011-12-28

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