CN1205762A - Wind turbine yaw system - Google Patents
Wind turbine yaw system Download PDFInfo
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- CN1205762A CN1205762A CN96199120A CN96199120A CN1205762A CN 1205762 A CN1205762 A CN 1205762A CN 96199120 A CN96199120 A CN 96199120A CN 96199120 A CN96199120 A CN 96199120A CN 1205762 A CN1205762 A CN 1205762A
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- gondola
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- 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
Abstract
The invention relates to a yawing system for wind turbines for adjusting the wind turbine in the required direction against the wind by turning about the yawing axle (14) of the turbine and for preventing the periodic vibrations in the nacelle about the yawing axle being transmitted as pulsating moments to the tower construction. The invention is characterised by at least one hydraulic motor (34) for turning the nacelle (12) about the yawing axle (14), a controllable throttle valve (50), named a parallel valve, arranged in a parallel line (by-pass line) to the hydraulic motor (34) and means (30) capable of changing the opening diameter of said throttle valve (50) in accordance with the position of the nacelle in relation to the wind direction.
Description
Technical field
The present invention relates to a kind of arrangement for deflecting of wind turbine, it can be used for adjusting wind turbine, makes it to rotate towards required wind direction around its yawing axis; Simultaneously, can prevent that also the periodic vibration that gondola is produced from going to tower structure with the transmission of torque of pulsed when yawing axis rotates.
Background of invention
In conventional art, the wind power station makes the turbo machine gondola deflect to the required angle of facining the wind with oil hydraulic motor.In case after gondola arrived required direction, it was just locked by strong lock.Turbo machine is fixed on this direction always, and up to the certain minimum angles of change of the wind, at this moment, lock is opened, and turbo machine rotates to new position, and locked once more.This system has a lot of shortcomings and narrow limitation: turbo machine does not reach optimum efficient; Stress on the lock is too big, usually causes the slippage and the damage of normal lock.Another problem of this wind turbine is: act on epitrochanterian power and make generation vibration in the gondola, this vibration is not of uniform size in the whole Sweep range of rotor.Such as, the wind speed of eminence is just greater than the wind speed near ground.
These shortcomings are well-known, and people have developed many devices and prevented that these vibrations from especially going on the tower to the power station structure with the transmission of torque of pulsed.For example, EP-A1-0110807 has described a kind of device, it is being provided with a flow control valve to the bypass oil pipe of oil hydraulic motor, make the direction deflection of gondola with it towards wind, simultaneously, be provided with hydraulic accumulator, to reduce in the hydraulic system because the pressure surge that gondola is produced around the yawing axis vibration.The inventor who proposes native system has done test to this device, and find: bring about the desired effect in order to make bypass valve, its restriction must have a very big diameter, and this fundamentally need produce very big liquid stream in oil pump, so that turbo machine deflection.Therefore, this technological scheme is considered in fact infeasible.
Also have a problem to be, the energy that the gondola fluctuation produces does not pass to a tower, but by being retained in the hydraulic system for once more the accumulation of energy of hydraulic pressure accumulator.In addition, the energy of storing in the hydraulic accumulator has also played bad effect, this be because, when gondola rotated on the extreme position, hydraulic accumulator was full of fully, at this moment, the direction that pressure applies is constant, and the direction of vibration is to return, and so not only can not play the effect that reduces vibration, makes the vibration aggravation on the contrary.Therefore, to a great extent, do not wish that the vibrational energy that produces is not eliminated.
Summary of the invention
The objective of the invention is: reduce the periodic vibration of generation in service; The energy that prevents to vibrate generation is passed in the structure of turbo machine and goes; Simultaneously, make the continuous deflection of turbo machine, allow it rotate in the face of wind direction all the time.This purpose is realized by a turbo machine arrangement for deflecting, to regulate turbo machine, it is rotated around yawing axis, thereby makes turbo machine all the time in the face of wind direction; Can also prevent gondola around the periodic vibration of yawing axis with the pulsed transmission of torque to tower structure, it is characterized in that: gondola is to be provided with like this, and it can rotate around yawing axis under the effect of at least one oil hydraulic motor; There is a controlled throttle valve to be arranged on the oil pipe in parallel (bypass oil pipe) of oil hydraulic motor; The bore of described throttle valve can be regulated with respect to the residing position of wind direction according to gondola.
Description of drawings
Below the embodiment who recommends is described, the accompanying drawing that is referenced to comprises:
Fig. 1 is the side view that has the wind turbine gondola of partial cutaway;
Fig. 2 is the circuit diagram of deflection hydraulic system;
Fig. 3 shows the gondola of gondola in yawing axis periodic vibration process and the situation of change of the angle of wind direction;
Fig. 4 shows the situation of change according to the gondola vibration velocity of Fig. 3;
Fig. 5 is that the valve in parallel in the system obtains the also control graph of processing control signals;
Fig. 6 shows the nominal value signal, and this signal is the input signal of control valve in parallel; With
Fig. 7 and Fig. 8 show the variation of the pressure reduction in the hydraulic system in the periodic vibration, and one is the valve with fixed orifice, and another is the valve of controlling according to the present invention.
Explanation to preferred embodiment
The wind turbine that will install is shown in the label among Fig. 1 10 in the present invention.The same with traditional mode, this turbo machine comprises a gondola 12, and this gondola 12 is installed in rotation on the tower 16 around yawing axis 14.Gondola 12 comprises turbine shaft 18, at an end of this turbine shaft 18 motor 20 is installed.The other end of axle 18 links to each other with gear 22, and this gear 22 passes to generator 24 to rotation by train of gearings.Be provided with measuring wind speed device 26 and wind transducer on gondola, air velocity transducer 26 is used to measure wind-force, and wind transducer is exactly a wind flag 28.These two elements all link to each other with controlling device 30 with control by lead, and this control and controlling device comprise microprocessor.
Gondola 12 is connected on the tower 16 rotationally by bearing 32.In an illustrated embodiment, between tower and gondola, be provided with two oil hydraulic motors 34.Between tower and gondola, also be provided with direction sensor 36.This direction sensor links to each other with control gear 30 by lead.As shown in Figure 2, oil hydraulic motor 34 is connected between two hydraulic oil pipes 38 in parallel.Oil pipe 38 links to each other with proportional control valve 40, that is to say, the bore of this control valve is directly proportional with the voltage that is born, and this control valve communicates with liquid pump 42 on the one hand, communicates with hydraulic oil container 44 on the one hand.Two reduction valve 46 are being set between two oil pipes 38, are that is to say, they are in parallel with oil hydraulic motor 34, and only direction is opposite.With proportional control modulating valve 50 in addition of oil hydraulic motor 34 parallel connections, the valve in parallel that it is just mentioned herein.Liquid supplementation pipe 52 makes liquid pump 42 link to each other with parallel transistor 56 by relief valve 54.End in liquid supplementation pipe 52 is equipped with an one-way valve 58.
On each root and the hydraulic tube 38 that oil hydraulic motor 34 links to each other a pressure transducer 60 is housed all, is used for measuring the hydraulic pressure of oil hydraulic motor 34 both sides.Pressure transducer 60 links to each other with controlling device 30 by oil pipe.Temperature transducer 62 links to each other with oil hydraulic circuit, and it also is connected on the controlling device 30 by oil pipe.In addition, control valve 40 also links to each other with controlling device 30 with valve 50 in parallel.
With regard to three kinds of different situations, the present invention will be described in more detail below, so that the control criterion of its structure, working principle and control system to be described.The rotation of gondola when hanging down wind speed
In running order when turbo machine, when hydraulic system is in pressure state, control system is in running order, all sensors are all constantly being monitored.Under certain wind speed, turbo machine does not rotate, and this is because device does not produce any electric current when hanging down wind speed.But turbo machine will keep consistent with the direction of wind with gondola, so that when wind speed strengthens, can turn round.Wind flag 28 on the gondola shows the direction of wind, and signal is sent to control gear 30 continuously.If gondola is not in correct angle with respect to wind direction, control gear 30 is just opened control valve 40, and the hydraulic oil after the supercharging is entered oil hydraulic motor 34 through oil pipe 38, and this motor 34 rotates gondola.Direction sensor 36 detects the direction of gondola, when the wind direction of detected direction and 28 demonstrations of wind flag is consistent, control valve 40 throttlings, gondola also stops operating, below the working principle of valve 50 in parallel is done illustrating in greater detail, but it is being closed in above deflection.When the constant wind speed of wind direction increases
When wind speed increased to a predetermined particular value, wind turbine began to rotate.When the blade of turbo machine forwards the running position to by position of rest, and/or the lock of locking turbine shaft 18 is by position of rest when released, and turbo machine all can begin to rotate.When turbo machine rotates, the power that on blade and whole device, all can change.The variation of power mainly is that therefore, in the turbo machine rotation process, the load that its eminence blade is born is greater than other blade because the wind speed on the different heights is inequality, and high wind speed is big more highly more usually.This variation has caused the periodic vibration of gondola 12 around its yawing axis 14.Fig. 3 represents angle of yaw and time relation curve, and Fig. 4 represents yaw rate.Make oil hydraulic motor begin to rotate around the rotation of yawing axis, according to the difference of direction, produced pressure in one or another one oil pipe, hydraulic oil begins to flow.The flow of oil hydraulic motor and the variation of pressure and deflection speed cophasing that is to say, when speed was the highest, pressure difference was also maximum.Control gear 30 constantly obtains in two oil pipes about pressure value P
1With P
2Information, and calculating pressure is poor, with the pressure difference as two oil pipes.Pressure difference is imported into control circuit 70, sees Fig. 5, and as actual data, hereinafter is called P
dThe nominal pressure difference also is transfused to control circuit, hereinafter is called P
DrTo introduce below and how obtain P
DrValue.
At P
DrWith P
dValue be transfused to before the control circuit, earlier they are taken absolute value.In control circuit they are compared, the departure of leaving circuit is P
DeP
DeAt first will handle through so-called lagging filter 72, lagging filter 72 is a kind of low-pass filters, and it amplifies low frequency, and amplification multiple is greater than the magnification factor of high frequency.From lagging filter 72 picked up signal d
Pg, it is delivered to valve 50 in parallel, signal d
PgConsistent with restriction, that is to say that departure is big more, it is big more that valve in parallel is opened.Because valve 50 common reverse operations in parallel, promptly departure is big more, and it is more little that valve 50 in parallel is opened, so the value that obtains from lagging filter 72 just must be got inverse.This will carry out in circuit 74, and correction factor of circuit 74 usefulness makes signal d
PgGet inverse.The signal d that in circuit 74, obtains
p, its size has determined the bore of valve in parallel, just goes the stretching degree of control valve with the voltage of certain value.When valve 50 in parallel was opened, oil flow in the low pressure fuel pipe through valve 50 from high-pressure oil pipe.Just as said, pressure is constantly measured, pressure reduction P
dAlso constantly with nominal value P
DrCompare regulating error P
DeThrough handling, ceaselessly controlling the bore d of valve in parallel
pDetermining of name pressure difference
As mentioned above, the control of valve in parallel is to be finished by the value that compares actual pressure differential and nominal pressure reduction, and valve opens and closes up to departure and reduces to minimum.The name pressure difference is to obtain by following method.Wind flag 28 constantly shows wind direction, and promptly the nominal value of gondola angle of yaw hereinafter is called THr.Simultaneously, direction sensor 36 shows the actual value of gondola angle of yaw, is called TH.These two kinds of signals all enter control circuit 76, and its output signal is departure THe.When gondola angle of yaw during around its nominal value THr cyclic swing, departure THe also constantly changes its symbol.Departure partly enters a circuit, comprises a lagging filter 78 in this circuit, to calculate required average pressure reduction P
DmrDeparture THr then enters another lagging filter 82 as signal, to calculate average nominal speed ω
Rg, this device deflection speed that should have just.The signal that receives from direction sensor 36 is imported into the loop 84, to obtain actual rotational speed omega.Owing to be periodic vibration, the symbol of this signal also can change.
Signal P
Dm, ω
RgWith ω be the input value of circuit 86, to calculate actual damping pressure value P
DrdSignal P
DmrLeft circuit 78, and passed through such processing: wave filter amplifies the signal low frequency part, and filters out its HFS.This means that just in case wind direction changes, gondola is done the cycle when rotating around yawing axis, the departure THe that obtains by relatively THr and TH will be filtered, and P
DmrEqual zero.Work as P
DmrWhen equalling zero, with damping pressure P
DrdBe set to be lower than slightly the pressure maximum that hydraulic system can bear.The signal of rotating speed T is to use like this, and it should be just or negative that its symbol is used to refer to damping pressure actually.When gondola periodic vibration, symbol also is the cycle variation.Damping pressure P
DrdOutput signal will be one and be symmetrical in 0, the rectangular wave of amplitude constant.Then, signal is handled through oversampling circuit 88, and the zero energy setting device known to circuit 88 is below will illustrate in greater detail it.The output signal of circuit 88 is exactly present nominal pressure difference P
Dr, then, it shown in part i waveform among Fig. 6, enters control circuit 70 with the form of the rectangular wave of symmetry, and it will at first experience the processing of absolute value at this.Because this signal is the rectangular wave of symmetry before this, with it through after absolute value conversion, this signal have one constant on the occasion of.
As mentioned above, the actual value P of pressure reduction
dEnter control circuit 70, and it is compared with constant nominal value.Therefore, departure signal P
DeAlso fluctuate, and pressure reduction is big more P along with vibration
DeValue more little.P
DeGot after the inverse, this signal makes valve d in parallel
pOpen, described signal is directly proportional in itself with the bore that valve in parallel is opened, and that opens is big more, and pressure reduction is also big more.This means that when gondola was on the extreme position of vibration, pressure reduction was minimum, valve in parallel opens up into its institute can open maximum caliber.When gondola when extreme position goes back to, along with oil hydraulic motor begins rotation, pressure reduction increases.This is detected by pressure transducer 60, and the pressure reduction after the calculating enters control circuit, and compares with nominal value.
The output signal of control circuit will diminish, like this, and the opening bore and also can diminish thereupon of valve.Therefore, control circuit is being controlled valve, and control circuit utilizes this principle operation, that is: pressure reduction is remained on the constant relatively numerical value.When the energy transfer of vibrating generation was in hydraulic pressure installation, because the damping function of pressure reduction, when hydraulic oil flow through bypass valve, energy will be released with the form of heat energy.Damping force by between each differential pressure curve and the area that is enclosed between X-axis determine.Shown in Fig. 7 and 8, if having the comparing of valve in parallel of the valve in parallel of fixed throttle port and the control according to the present invention, the restriction of design can obtain bigger damping force according to the present invention.Changing wind direction than high wind
If wind direction changes in operation process, gondola also has to turn to the direction in face of wind, and this is in order to obtain optimum operation on the one hand, also is for fear of the tilting force that acts on the whole device on the one hand.When direction changed, the wind flag showed wind direction, and THr changes.This variation is introduced among the departure THe, and THe is as a low frequency signal variable quantity, and it is exaggerated in lagging filter.Like this, just obtained a P
DmrValue, shown in a curve below among Fig. 6, P
DmrBe used to calculate damping pressure P
DrdGet on P for making gondola can turn to required direction
DrdTo be deducted a suitable value, and be endowed suitable symbol.Like this, P
DrdJust obtain one and looked asymmetric and that is to say square-wave signal, had lower vibration amplitude in a side of X-axis, shown in II part curve among Fig. 6.P
DrdIn the name of be worth input control circuit 70, to control valve in parallel and to handle by the mode identical with above-mentioned mode.What taken place in the adjustment process of valve in parallel is to be absolute damping in one direction, and at other direction, just on the required direction that forwards to of gondola, to have less damping.When gondola when yawing axis rotates, each vibrational period gondola is all towards step-length of required direction deflection, so just obtained continuous adjustment action, simultaneously, has been subjected to the damping function of system.Therefore, in running, periodic vibration is used to rotate gondola, corrects its rotation along wind direction.So, in running, just changed the direction of gondola without control valve 40.
As mentioned above, signal P
DrdEntering so-called zero energy setting device 88 handles.Signal P
Dmr, P and P
DrdAlso enter this circuit.According to the intrasystem in the running maximum pressure of hydraulic system of the present invention is 350 crust, helps obtaining on oil hydraulic motor 34 big torque like this.The deficiency of this high system pressure is that hydraulic oil has slight compressibility, makes it have buoyancy effect.When periodic vibration arrived extreme position, although pressure reduction should offset with damping for zero, can in fact still exist pressure reduction this moment, this can cause buoyancy effect.When speed was zero, zero energy setting device 88 was given nominal value of valve in parallel, and it is opened fully, like this, just can make hydraulic oil by and make the pressure reduction reduction at this place.If wind direction is fixed, pressure reduction is preferably zero, and still, if because the change of wind direction must be proofreaied and correct the gondola direction, at this moment, pressure just is reduced to a certain particular value.Therefore, if from P
DmrThe value of signal be not equal to zero, the zero energy setting device will adjust.
Throttling meeting by 50 pairs of hydraulic oil of valve in parallel makes a large amount of heat of generation in the hydraulic oil, and this is that the energy that is produced by periodic vibration in valve is transformed into.In order to keep a normal operating temperature, the hydraulic oil of heat must constantly be replaced and cool off.These are finished by control valve 40, and it constantly provides fresh oil, and remove the hydraulic oil of heat.The above-mentioned adjusting action of control valve 40 is being carried out always, even if also be like this in turbine operation.Flow in the turbo machine is by control valve 50 direct compensation, and the flow that the flow that comes the self-deflection valve occurs when suppressing periodic vibration usually.Temperature in the oil hydraulic circuit is also constantly by temperature transducer 90 monitoring, as shown in Figure 2.
According to damping of the present invention and deflection system following advantage is arranged: existing hydraulic system and oil hydraulic motor still can use on the one hand; On the other hand,, can obtain one than the better damping of existing systems by effective throttling of valve in parallel, simultaneously, the excess energy that vibration produced in can also the elimination system, and no longer it is passed to structure or be kept in the system; In addition, the throttling of valve in parallel can also make gondola deflect when producing damping force.
Have to be noted that the present invention is not limited to top description and embodiment shown in the drawings, it can also be made amendment within the scope of the appended claims.
Claims (7)
1. the arrangement for deflecting of a wind turbine is used to regulate turbo machine and makes it around its yawing axis (14) rotation, thereby makes turbo machine be in required direction in the face of wind direction all the time; Can also offset the periodic vibration of gondola around yawing axis, this periodic vibration, is characterized in that to tower structure with the pulsed transmission of torque: have at least an oil hydraulic motor (34) to be used for making gondola (12) to rotate around yawing axis (14); A controlled throttle valve (50) is arranged, be also referred to as valve in parallel, be arranged on to the oil pipe in parallel of oil hydraulic motor (34) in other words on the bypass oil pipe; Also be provided with element (30), this element (30) can make the bore of described throttle valve (50) regulate with respect to the residing position of wind direction according to gondola.
2. device as claimed in claim 1 is characterized in that: the periodic vibration of gondola produces pressure reduction in hydraulic tube (38), this hydraulic tube (38) links to each other with oil hydraulic motor; Be provided with parts (36,38), it constantly measures the actual value (TH) and the nominal value (THr) of gondola present position; Be provided with parts (76), it constantly compares their difference (THe), and this difference comprises the nominal value (P that described pressure reduction should have
Dr); Be provided with parts (60), it constantly measures the actual value (P of described pressure reduction
d); And be provided with parts (70), the actual value of its more described pressure reduction and nominal value, wherein, difference (P
De) constituted the control signal of described valve in parallel (50).
3. device as claimed in claim 2 is characterized in that: be provided with valve in parallel (50), its control mode is to make the described difference of described nominal pressure difference and actual pressure differential value minimum.
4. device as claimed in claim 3 is characterized in that: be provided with parts (36), it constantly measures the speed (ω) of gondola in the periodic vibration process; And be provided with parts (30), it regulates the nominal value (P of described pressure reduction
Dr) symbol, make it consistent with the symbol of described speed, that is to say, described nominal value periodically on the occasion of and negative value between change.
5. device as claimed in claim 4 is characterized in that: be provided with parts (30), it is with the nominal value (P of described pressure reduction
Dr) be set to be lower than slightly the maximum working load that rotates the gondola hydraulic pressure installation, condition is that the difference symmetry between the actual value of gondola position and the nominal value changes, just, gondola is around yawing axis periodic vibration, and its amplitude is identical in the both sides of the nominal value of this position size.
6. device as claimed in claim 4 is characterized in that: be provided with parts (30), the difference that it can described size changes the nominal value (P of described pressure reduction
Dr), condition is, the poor asymmetry change between the actual value of gondola position and the nominal value, and just, gondola is around yawing axis periodic vibration, and its amplitude is bigger in a side of the nominal value at same position place.
7. device as claimed in claim 6 is characterized in that: be provided with parts (30), its can with the nominal value of pressure reduction on the occasion of reducing a corresponding quantity, at this moment, the symbol of difference of vibration is for just, vice versa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96199120A CN1205762A (en) | 1995-12-18 | 1996-12-06 | Wind turbine yaw system |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9504512-6 | 1995-12-18 | ||
| CN96199120A CN1205762A (en) | 1995-12-18 | 1996-12-06 | Wind turbine yaw system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1205762A true CN1205762A (en) | 1999-01-20 |
Family
ID=5129330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96199120A Pending CN1205762A (en) | 1995-12-18 | 1996-12-06 | Wind turbine yaw system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1205762A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022262A (en) * | 2009-08-25 | 2011-04-20 | 维斯塔斯风力系统集团公司 | Yaw system for a nacelle of a wind turbine and wind turbine |
| CN101503988B (en) * | 2008-02-04 | 2011-06-15 | 段小平 | Wind power generation plant |
| CN101078390B (en) * | 2006-05-25 | 2012-04-25 | 通用电气公司 | Methods and apparatus for assembling and operating semi-monocoque rotary machines |
| CN101294549B (en) * | 2007-04-27 | 2012-10-10 | Xemcvwec公司 | Wind turbine |
| CN103321854A (en) * | 2013-05-29 | 2013-09-25 | 国家电网公司 | Vibration control method for wind generator set tower |
| CN103867382A (en) * | 2012-12-18 | 2014-06-18 | 苏州工业园区新宏博通讯科技有限公司 | Wind power generation system |
| CN101725468B (en) * | 2008-10-28 | 2015-07-22 | 西门子公司 | Wind turbine arrangement and method for aligning a wind turbine with the wind direction |
| CN111219294A (en) * | 2018-11-27 | 2020-06-02 | 维斯塔斯风力系统集团公司 | Active yaw mitigation of wind-induced vibration |
| US11781524B2 (en) | 2018-11-27 | 2023-10-10 | Vestas Wind Systems A/S | Active yaw mitigation of wind induced vibrations |
-
1996
- 1996-12-06 CN CN96199120A patent/CN1205762A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101078390B (en) * | 2006-05-25 | 2012-04-25 | 通用电气公司 | Methods and apparatus for assembling and operating semi-monocoque rotary machines |
| CN101294549B (en) * | 2007-04-27 | 2012-10-10 | Xemcvwec公司 | Wind turbine |
| CN101503988B (en) * | 2008-02-04 | 2011-06-15 | 段小平 | Wind power generation plant |
| CN101725468B (en) * | 2008-10-28 | 2015-07-22 | 西门子公司 | Wind turbine arrangement and method for aligning a wind turbine with the wind direction |
| CN102022262A (en) * | 2009-08-25 | 2011-04-20 | 维斯塔斯风力系统集团公司 | Yaw system for a nacelle of a wind turbine and wind turbine |
| CN103867382A (en) * | 2012-12-18 | 2014-06-18 | 苏州工业园区新宏博通讯科技有限公司 | Wind power generation system |
| CN103321854A (en) * | 2013-05-29 | 2013-09-25 | 国家电网公司 | Vibration control method for wind generator set tower |
| CN103321854B (en) * | 2013-05-29 | 2016-08-10 | 国家电网公司 | A kind of vibration control method for wind generator set tower |
| CN111219294A (en) * | 2018-11-27 | 2020-06-02 | 维斯塔斯风力系统集团公司 | Active yaw mitigation of wind-induced vibration |
| CN111219294B (en) * | 2018-11-27 | 2022-04-12 | 维斯塔斯风力系统集团公司 | Active yaw mitigation of wind-induced vibration |
| US11781524B2 (en) | 2018-11-27 | 2023-10-10 | Vestas Wind Systems A/S | Active yaw mitigation of wind induced vibrations |
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| CB02 | Change of applicant information |
Applicant after: GE Energy A.S. Applicant before: The company of several |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: KAVANA COMPANY TO: GE ENERGY(NORWAY) CORP. |
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| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |