DE19628073C1 - Wind-powered generation plant rotor blade angle correction method - Google Patents
Wind-powered generation plant rotor blade angle correction methodInfo
- Publication number
- DE19628073C1 DE19628073C1 DE19628073A DE19628073A DE19628073C1 DE 19628073 C1 DE19628073 C1 DE 19628073C1 DE 19628073 A DE19628073 A DE 19628073A DE 19628073 A DE19628073 A DE 19628073A DE 19628073 C1 DE19628073 C1 DE 19628073C1
- Authority
- DE
- Germany
- Prior art keywords
- rotor
- blade angle
- wind turbine
- rotor blades
- adjusting
- 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.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000012937 correction Methods 0.000 title abstract description 4
- 238000005259 measurement Methods 0.000 claims abstract description 5
- 238000012935 Averaging Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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
- F03D7/04—Automatic control; Regulation
- F03D7/042—Automatic control; Regulation by means of an electrical or electronic controller
- F03D7/043—Automatic control; Regulation by means of an electrical or electronic controller characterised by the type of control logic
-
- 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
- F03D13/30—Commissioning, e.g. inspection, testing or final adjustment before releasing for production
- F03D13/35—Balancing static or dynamic imbalances
-
- 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
- F03D7/022—Adjusting aerodynamic properties of the blades
- F03D7/024—Adjusting aerodynamic properties of the blades of individual blades
-
- 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
-
- 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
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/335—Output power or torque
-
- 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
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
Description
Die Erfindung betrifft ein Verfahren zur Justierung der Blattwinkel der Rotorblätter einer Windkraftanlage.The invention relates to a method for adjusting the Blade angle of the rotor blades of a wind turbine.
Die Rotorblätter üblicher Windkraftanlagen werden im allgemeinen mit einer Nullmarkierung an der Blattwurzel auf einen bestimmten Einstellwinkel ausgerichtet. Tole ranzen in der Verwindung, gegebenenfalls sogar Alte rungsprozesse, führen dann zu einer Differenz der Blatt winkel im Betrieb. The rotor blades of conventional wind turbines are in the generally with a zero mark on the leaf root aligned to a certain setting angle. Tole satchel in the twist, possibly even old people processes, then lead to a difference in sheets angle in operation.
Diese Differenz kann eine aerodynamische Unsymmetrie er geben, die die Betriebsfestigkeitslasten einer Wind kraftanlage unnötig erhöht und dynamisch eine Anregung einer Schwingung mit der Rotordrehzahl bewirkt. Dies ist unerwünscht.This difference can result in an aerodynamic asymmetry give that the durability loads of a wind power plant unnecessarily increased and dynamic a stimulus an oscillation with the rotor speed. This is undesirable.
Die Erfindung hat sich daher zur Aufgabe gestellt, die auftretenden unsymmetrischen Belastungen zu minimieren.The invention is therefore based on the task to minimize occurring asymmetrical loads.
Erfindungsgemäß wird dies durch die Merkmale des gelten den Anspruchs 1 gelöst. Die Unteransprüche geben vor teilhafte Ausführungsformen der Erfindung wieder.According to the invention, this will apply due to the features of solved the claim 1. The sub-claims specify partial embodiments of the invention again.
Insbesondere ist vorteilhaft für den Fall, daß die Anla
ge eine Einzelblattverstellung besitzt, folgendes Ver
fahren zur automatischen Symmetrierung zu verwenden:
Bei gleichmäßigem, also insbesondere bei mäßig starkem
Wind registriert der Betriebsführungsrechner alle Lei
stungsmaxima, die sich aus der natürlichen Windscherung
ergeben und korreliert diese zur Rotorposition. Für je
des Blatt werden die Maxima summiert. Nach einer vorbe
stimmten Zeit wird dann durch Vergleich festgestellt, ob
eines oder mehrere der Rotorblätter im Mittelungszeit
raum überdurchschnittliche Leistungsmaxima erzeugt ha
ben. Sofern dies der Fall ist, werden die entsprechenden
Korrekturen am Blattwinkel vorgenommen. Beispielsweise
wird dieses eine Blatt um einen vorgewählten Minimal
schritt zurückgestellt, woraufhin die Messung erneut be
ginnt.In particular, it is advantageous to use the following procedure for automatic balancing in the event that the system has a single sheet adjustment:
In the case of a steady, that is to say in particular a moderately strong wind, the operational management computer registers all the power maxima which result from the natural wind shear and correlates them to the rotor position. The maxima are summed for each sheet. After a predetermined time, it is then determined by comparison whether one or more of the rotor blades has generated above-average power maxima in the averaging period. If this is the case, the corresponding corrections are made to the blade angle. For example, this one sheet is set back by a preselected minimum step, whereupon the measurement begins again.
Falls das Maximum sich vergrößert, wird ein beispiels weise doppelter Weg in die andere Richtung beschritten, falls in erwünschter Weise sich das Maximum verringert hat, wird so lange weitergestellt, bis eine gleichmäßige Ausbeute aller Rotorblätter erreicht wird.If the maximum increases, an example becomes wise double way in the other direction, if desired, the maximum decreases has continued until an even one Yield of all rotor blades is achieved.
Selbstverständlich ist es auch möglich, statt einer Ver stellung eines Rotors, der ein Maximum aufweist, die an deren beiden Rotoren entsprechend zu verstellen. Durch die Verstellung jeweils nur eines Rotors ist es jedoch einfacher, die tatsächlichen Auswirkungen der Verstel lung zu überprüfen.Of course it is also possible to use a Ver position of a rotor that has a maximum, the to adjust their two rotors accordingly. By however, it is only the adjustment of one rotor at a time easier the actual impact of the Verstel check.
Weitere Vorteile der Erfindung ergeben sich aus nachfol gender Beschreibung eines bevorzugten Ausführungsbei spiels anhand der beigefügten Zeichnung.Further advantages of the invention result from the following Description of a preferred embodiment game based on the attached drawing.
Dabei zeigt:It shows:
Fig. 1 die sich tatsächlich ergebende Zuordnung der Leistungsmaxima zu den einzelnen Rotorpositio nen anhand eines beispielsweise über einen Zeitraum von mehreren Umdrehungen erfassenden Zeitbereiches anhand einer Kurve der Lei stungsabgabe, Fig. 1, the actually resulting assignment of power to the individual maxima Rotorpositio NEN by way of example, over a period of several revolutions detected time range based on a curve of the Lei stungsabgabe,
Fig. 2 eine graphische Darstellung, bei der die Lei stungsbeiträge, die jedem Rotorblatt zugeord net sind, aufsummiert sind, und Fig. 2 is a graphical representation in which the performance contributions which are assigned to each rotor blade are added up, and
Fig. 3 eine schematische Darstellung der mathemati schen Weiterbehandlung der Leistungsbeiträge, die jedem Rotorblatt zugeordnet sind. Fig. 3 is a schematic representation of the mathematical further processing of the contributions that are assigned to each rotor blade.
Sobald ein Rotorblatt nach oben steht, d. h. möglichst weit von dem die Luftbewegung bremsenden Boden entfernt ist, wird sich ein kleines lokales Maximum im Leistungs verlauf ergeben. Diese Maxima werden nun bei nicht ju stierten Anlagen für unterschiedliche Blätter des Rotors meist leider unterschiedliche Amplituden haben, d. h. die Blätter liefern leicht unterschiedliche Leistungsbeiträ ge.As soon as a rotor blade is up, i. H. if possible far from the floor that is stopping air movement is, there will be a small local maximum in performance course. These maxima are now at not ju systems for different blades of the rotor mostly have different amplitudes, d. H. the Leaves provide slightly different contributions ge.
Durch zeitliche Mittelung für einen längeren Bereich von ca. zehn Minuten oder einer Stunde ergeben sich durch Integralbildung über jeweils einen Bereich, in dem das fragliche Rotorblatt nach oben steht, die beispielsweise in Fig. 2 dargestellten Säulendiagramme mit unterschied lichen Höhen für die Leistungskomponenten jeweils eines Rotorblattes.By time averaging for a longer range of about ten minutes or an hour, integral formation over a range in which the rotor blade in question stands up gives the column diagrams shown in FIG. 2 with different heights for the power components, one each Rotor blade.
Durch Auswertung der Differenzen der sich in diesem Säu lendiagramm ergebenden Werte können Blattwinkelkorrektu ren errechnet werden, die zu einer Verstellung des Kor rekturwinkels führen, so daß anschließend eine neue Mes sung vorgenommen werden kann. Ein selbstlernendes oder rekursives System läßt sich mit geeigneter Elektronik leicht herstellen.By evaluating the differences in this column Values resulting from the graph can correct the blade angle be calculated that lead to an adjustment of the Cor lead rectification angle, so that then a new measurement solution can be made. A self-learning or recursive system can be with suitable electronics easy to manufacture.
Einem ersten zeitaufgelösten Messen der Leistungsabgabe der Windkraftanlage schließt sich also eine (zunächst beliebige) Zuordnung der auf dem Leistungsverlauf auf tretenden zeitlichen Abschnitte zu den Leistungsbeiträ gen der einzelnen Rotorblätter an.A first time-resolved measurement of the power output the wind turbine therefore closes one (initially any) assignment on the performance history occurring time periods for the performance contributions against the individual rotor blades.
Daraufhin werden die einzelnen Blätter des Rotors zur Minimierung der aufgetretenen Differenzen der Leistungs beiträge zur Minimierung aerodynamischer Unwuchten nach dem Ergebnis justiert, das nach dem Aufsummieren der Zeitabschnitte auf dem Leistungsverlauf über jeweils ei nen Winkelbereich zu den Rotorblättern und Differenzbil dung ermittelt wird. Zu diesem Zweck werden die zur Sym metrie notwendigen Verstellwinkel aus den Leistungsdif ferenzen von der Betriebsführung errechnet.The individual blades of the rotor then become Minimize the differences in performance that occur contributes to minimizing aerodynamic imbalances adjusted the result after adding up the Periods of performance over each egg NEN angular range to the rotor blades and differential balance is determined. For this purpose, the Sym necessary adjustment angle from the performance dif computed by the management.
Schwankende Windverhältnisse (Böen) während des Summati onszeitraums werden durch eine Mittelung über einen Be reich von. ca. 10 min-1 h mitberücksichtigt.Fluctuating wind conditions (gusts) during the summati ons period are averaged over a Be rich of. approx. 10 min-1 h also taken into account.
Das Einstellen der Blätter kann mit einem willkürlichen Verstellen eines Rotorblattes in eine erste Richtung (Rückstellung) begonnen werden, woraufhin der zugeordne te Leistungsbeitrag mit dem bisherigen Wert verglichen wird, zur Bestimmung ob die Differenz größer geworden ist und in eine andere Richtung gedreht werden muß, oder ob bessere Abstimmung erreicht ist. Alternativ kann auch durch erneutes zeitaufgelöstes Messen der zugeordneten Leistungsbeiträge bestimmt werden, ob die Differenz grö ßer geworden ist und in eine andere Richtung gedreht werden muß, oder ob bessere Abstimmung erreicht ist.The setting of the leaves can be done with an arbitrary Adjusting a rotor blade in a first direction (Default) are started, whereupon the assigned te performance contribution compared with the previous value is used to determine whether the difference has increased is and must be turned in a different direction, or whether better coordination has been achieved. Alternatively, too by measuring the assigned time again Performance contributions are determined whether the difference is large has grown and turned in a different direction must be, or whether better coordination has been achieved.
Claims (4)
- a) zeitaufgelöstes Messen der Leistungsabgabe der Windkraftanlage,
- b) Zuordnung der auf dem Leistungsverlauf über die Zeit auftretenden zeitlichen Abschnitte zu den Lei stungsbeiträgen der einzelnen Rotorblätter,
- c) Einstellung einzelner Blätter des Rotors zur Mini mierung der aufgetretenen Differenzen der Lei stungsbeiträge zur Minimierung aerodynamischer Un wuchten.
- a) time-resolved measurement of the power output of the wind turbine,
- b) assignment of the time segments occurring over time to the power contributions of the individual rotor blades,
- c) Adjustment of individual blades of the rotor to minimize the differences in performance which have occurred to minimize aerodynamic imbalances.
- - Aufsummieren einer Vielzahl von Leistungswerten über jeweils einen Winkelbereich, in dem ein zu geordnetes Rotorblatt annähernd vertikal nach oben steht, um damit eine Leistungsmittelung über schwankende Windverhältnisse während des Summati onszeitraums durchzuführen.
- - Sum up a large number of power values over an angular range in which an assigned rotor blade is approximately vertically upward, in order to carry out a power averaging over fluctuating wind conditions during the summation period.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19628073A DE19628073C1 (en) | 1996-07-12 | 1996-07-12 | Wind-powered generation plant rotor blade angle correction method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19628073A DE19628073C1 (en) | 1996-07-12 | 1996-07-12 | Wind-powered generation plant rotor blade angle correction method |
Publications (1)
Publication Number | Publication Date |
---|---|
DE19628073C1 true DE19628073C1 (en) | 1997-09-18 |
Family
ID=7799608
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19628073A Expired - Fee Related DE19628073C1 (en) | 1996-07-12 | 1996-07-12 | Wind-powered generation plant rotor blade angle correction method |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE19628073C1 (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10032314C1 (en) * | 2000-07-04 | 2001-12-13 | Aloys Wobben | Rotor blade angle evaluation method for wind-powered energy plant uses processor supplied with data for measured distance between rotor blade and mast of energy plant |
WO2005090781A1 (en) | 2004-03-22 | 2005-09-29 | Sway As | A method for reduction of axial power variations of a wind power plant |
DE102008013392A1 (en) | 2008-03-10 | 2009-09-17 | Christoph Lucks | Method for detecting spur running of rotor blade of tower of wind power plant, involves arranging enclosure opposite to tower in tilted manner, and arranging rotor with two rotor blades on wind-power plant |
US7883317B2 (en) | 2007-02-02 | 2011-02-08 | General Electric Company | Method for optimizing the operation of a wind turbine |
US7887292B2 (en) | 2007-03-16 | 2011-02-15 | Vestas Wind Systems A/S | Method for condition monitoring a rotor of a wind energy plant |
CN102162425A (en) * | 2010-02-23 | 2011-08-24 | 瑞能系统股份公司 | Method and device for attaching a reference marking to a rotor blade of a wind turbine |
DE102014118258A1 (en) | 2014-12-09 | 2016-06-09 | cp.max Rotortechnik GmbH & Co. KG | Method for reducing aerodynamic imbalances of wind turbines |
WO2016091254A1 (en) | 2014-12-09 | 2016-06-16 | Cp.Max Rotortechnik Gmbh & Co.Kg | Method for the reduction of aerodynamic imbalances of wind turbines |
EP2226501B1 (en) | 2005-06-21 | 2016-08-10 | Senvion GmbH | Method and arrangement for measuring of a wind energy plant |
EP1399674B1 (en) | 2001-06-07 | 2016-12-21 | Wobben Properties GmbH | Method for maximizing the energy output of a wind turbine |
WO2017028866A1 (en) * | 2015-08-19 | 2017-02-23 | Scada International A/S | A method for the detection of an anomaly in a wind turbine blade |
-
1996
- 1996-07-12 DE DE19628073A patent/DE19628073C1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
NICHTS ERMITTELT * |
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10032314C1 (en) * | 2000-07-04 | 2001-12-13 | Aloys Wobben | Rotor blade angle evaluation method for wind-powered energy plant uses processor supplied with data for measured distance between rotor blade and mast of energy plant |
EP1399674B1 (en) | 2001-06-07 | 2016-12-21 | Wobben Properties GmbH | Method for maximizing the energy output of a wind turbine |
EP1399674B2 (en) † | 2001-06-07 | 2020-02-26 | Wobben Properties GmbH | Method for maximizing the energy output of a wind turbine |
NO342746B1 (en) * | 2004-03-22 | 2018-08-06 | Sway As | Procedure for reducing axial power variations in a wind turbine. |
WO2005090781A1 (en) | 2004-03-22 | 2005-09-29 | Sway As | A method for reduction of axial power variations of a wind power plant |
AU2005224580B2 (en) * | 2004-03-22 | 2011-02-24 | Sway As | A method for reduction of axial power variations of a wind power plant |
EP2226501B1 (en) | 2005-06-21 | 2016-08-10 | Senvion GmbH | Method and arrangement for measuring of a wind energy plant |
EP2226501B2 (en) † | 2005-06-21 | 2020-12-09 | Senvion GmbH | Method and arrangement for measuring of a wind energy plant |
US7883317B2 (en) | 2007-02-02 | 2011-02-08 | General Electric Company | Method for optimizing the operation of a wind turbine |
EP1959130B1 (en) | 2007-02-02 | 2017-05-03 | General Electric Company | Method for optimizing the operation of a wind turbine |
EP1959130A3 (en) * | 2007-02-02 | 2015-06-24 | General Electric Company | Method for optimizing the operation of a wind turbine |
EP2122430B1 (en) | 2007-03-16 | 2017-12-06 | Vestas Wind Systems A/S | Method for condition monitoring a rotor of a wind energy plant |
US7887292B2 (en) | 2007-03-16 | 2011-02-15 | Vestas Wind Systems A/S | Method for condition monitoring a rotor of a wind energy plant |
DE102008013392B4 (en) * | 2008-03-10 | 2013-02-07 | Windcomp Gmbh | Method for detecting the tracking of the rotor blades of a wind turbine |
DE102008013392A1 (en) | 2008-03-10 | 2009-09-17 | Christoph Lucks | Method for detecting spur running of rotor blade of tower of wind power plant, involves arranging enclosure opposite to tower in tilted manner, and arranging rotor with two rotor blades on wind-power plant |
DE102010002230B4 (en) * | 2010-02-23 | 2014-11-27 | Senvion Se | Method and device for attaching a reference mark on a rotor blade for a wind turbine |
US8585948B2 (en) | 2010-02-23 | 2013-11-19 | Repower Systems Se | Method and device for applying a reference mark on a rotor blade for a wind power plant |
CN102162425B (en) * | 2010-02-23 | 2013-08-07 | 瑞能系统欧洲股份公司 | Method and device for attaching a reference marking to a rotor blade of a wind turbine |
EP2362094A2 (en) | 2010-02-23 | 2011-08-31 | REpower Systems AG | Method and device for attaching a reference marking to a rotor blade of a wind turbine |
DE102010002230A1 (en) | 2010-02-23 | 2011-08-25 | REpower Systems AG, 22297 | Method and device for attaching a reference mark on a rotor blade for a wind turbine |
CN102162425A (en) * | 2010-02-23 | 2011-08-24 | 瑞能系统股份公司 | Method and device for attaching a reference marking to a rotor blade of a wind turbine |
WO2016091254A1 (en) | 2014-12-09 | 2016-06-16 | Cp.Max Rotortechnik Gmbh & Co.Kg | Method for the reduction of aerodynamic imbalances of wind turbines |
DE102014118258A1 (en) | 2014-12-09 | 2016-06-09 | cp.max Rotortechnik GmbH & Co. KG | Method for reducing aerodynamic imbalances of wind turbines |
WO2017028866A1 (en) * | 2015-08-19 | 2017-02-23 | Scada International A/S | A method for the detection of an anomaly in a wind turbine blade |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8100 | Publication of patent without earlier publication of application | ||
D1 | Grant (no unexamined application published) patent law 81 | ||
8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: AERODYN ENGINEERING GMBH, 24768 RENDSBURG, DE |
|
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20130201 |