CN100398813C - Method of controlling aerodynamic load of a wind turbine based on local blade flow measurement - Google Patents
Method of controlling aerodynamic load of a wind turbine based on local blade flow measurement Download PDFInfo
- Publication number
- CN100398813C CN100398813C CNB2004800074512A CN200480007451A CN100398813C CN 100398813 C CN100398813 C CN 100398813C CN B2004800074512 A CNB2004800074512 A CN B2004800074512A CN 200480007451 A CN200480007451 A CN 200480007451A CN 100398813 C CN100398813 C CN 100398813C
- Authority
- CN
- China
- Prior art keywords
- blade
- angle
- attack
- blades
- relative velocity
- 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 48
- 238000005259 measurement Methods 0.000 title claims abstract description 16
- 230000008569 process Effects 0.000 claims description 2
- 238000009530 blood pressure measurement Methods 0.000 claims 2
- 230000003993 interaction Effects 0.000 abstract 1
- 241000282326 Felis catus Species 0.000 description 18
- 230000008859 change Effects 0.000 description 16
- 238000004088 simulation Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 7
- 230000009467 reduction Effects 0.000 description 7
- 230000001105 regulatory effect Effects 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000013016 damping Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
Images
Classifications
-
- 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 present invention relates to a method of controlling the aerodynamic load of a wind turbine's blades individually in such a way that the dynamic aerodynamic loads on the turbine are reduced and power production is optimised. In general the present invention will improve the overall stability of the turbine leading to reduce fatigue loads, reduced extreme loads during operation and reduced risk of blade-tower interaction. In particular preferred embodiment of the invention, flow properties are measured locally on the different blades or in front of the blades and from these measurements the pitch angle settings are changed, in other ways changing the aerodynamic properties, for the blades through a control unit.
Description
The field
The present invention relates to reduce the dynamic air dynamic load on the turbo machine and to optimize the mode that power is exported, the method for the aerodynamic load of independent control wind turbine blade.In a word, the present invention will improve the general stability of turbo machine, to reduce fatigue loads, reduce the limit load in the operating process and to reduce the interactional risk of blade tower.In a preferred embodiment of the invention, on different blades or at blade front local measurement mobile performance, changed the helix angle setting based on these measurements, otherwise changed the aerodynamic quality of blade by control unit.
Another aspect of the present invention relates to the method for special flow measurement method, design control system and how to change the method for vane aerodynamic performance.
Background technique
The size of present wind turbine makes wind can not be evenly distributed on whole rotor region as a rule.Difference on these wind speed that caused by turbulent flow, wind shear, yaw error operation, tower shadow and wake effect etc., the aerodynamic force that can change on blade in rotary course causes the serious fatigue loads of turbo machine, also causes limit load under some situation.
Traditional controlling method of pitch regulated turbo machine is to control the collective pitch (promptly all blades forward same angle simultaneously to) of all blades be provided with yet the output of the power of the very clear and definite turbo machine of the best is provided.From U. S. Patent 4,339,666 can learn, the control of helix angle is that the mode that the maximum load with rotor and generator is lower than maximum permissible value realizes.This patent has been described and has been used mean wind velocity and turbulent flow to be used as main Control Parameter.Yet its drawback is not consider the variation of wind speed on rotor region.
Can know a kind of measurement from patent WO0133075, how control the method for wind turbine helix angle, compensate uneven wind load by individual pitch based on the turbo machine mechanical load.Yet its drawback is because the huge aerodynamic force damping of blade, some the time can measurement mechanical load after the wind-force disturbance takes place.
U. S. Patent 6 361 275 has been authorized a kind of wind turbine patent of using individual pitch effectively to alleviate load.This patent mainly focuses on the effect of using strainometer or analog sensing lead on blade or hub.In conjunction with load measure, mentioned the measurement of the local wind speed and direction on blade.Yet owing to focus on the load measure performance, it does not have explanation how to use these different flow-sensint units.The unique channel that aerodynamic sensors is placed in vane trailing edge and change aerodynamic load is by adjusting the pitch of blade or partial blade.
Invention is described
A purpose of the preferred embodiment of the invention is by a kind of method based on the work of the control of the local air dynamic flow parameter measurement on blade or before blade wind turbine is provided, to overcome above-mentioned defective.In a particularly preferred embodiment of the present invention, measure and utilized flow parameter.This method comprises also that preferably computational load alleviates the method and apparatus that individual pitch angle is provided with, as the superposed signal of the collective pitch angle setting relevant with power.
According to a preferred embodiment of the invention, provide a kind of independent control to preferably include the method for each operational condition of wind turbine of at least two blades.This method preferably includes step, determines at least a Aerodynamic Flows performance near each blade, and determines one or more operating conditions, for example helix angle, angle of flap deflection etc. based on the mobile performance of determining for each blade.
In a particularly preferred embodiment of the present invention, giving the operating conditions of fixed blade is helix angle, and wherein said helix angle comprises composition of determining based on blade incidence and the composition of determining based on the speed of relative blade.The present invention also comprises the wind turbine that is fit to carry out the method according to this invention.
Below in conjunction with accompanying drawing the preferred embodiments of the invention are described, wherein
Fig. 1 schematically shows the rotor of wind turbine;
Fig. 2-5 expression is furnished with the different embodiments according to the blade of the preferred embodiments of the invention of flow measurement equipment.In Fig. 5 a and 5b, PS represents pressure transducer and is represented by thick black line;
Fig. 6 represents the blade according to the preferred embodiments of the invention, and TEF represents trailing edge flap among the figure;
Fig. 7 schematically shows the regulating system according to the preferred embodiments of the invention of the aerodynamic load of control wind turbine;
Fig. 8 is illustrated on the Tellus T-1995 angle of attack measured and the wing to the blade moment of flexure.Can see good correlation.From Madsen 1991; Header text:RISO NATIONAL LABORATORY, DENMARK; Oct.31,1990; 12:50; File:D t132bi t32ix1 Points averaged 15; Records:2500-2999;
Fig. 9 schematically shows the correlation between the angle of attack and lift and the resistance respectively;
Figure 10 schematically shows the correlation between the angle of attack and the lift, and represents the non-linear partial of this correlation especially;
Figure 11 schematically shows the blade that radian can change;
Figure 12 schematically shows the blade with movable trailing edge, represents movable trailing edge by MTE in the drawings;
Figure 13 represents optimum cycle pitch amplitude θ
CycWith wind speed V in the face
xRatio, the outer wind speed V of the face that is plotted as
yFunction;
Figure 14 represents optimum cycle pitch amplitude θ
CycWith wind speed V in the face
xRatio, be plotted as the function of the duplicate ratio of rotational speed and specified rotational speed;
Figure 15 represents optimum cycle pitch amplitude θ
CycWith wind speed V in the face
xRatio, be plotted as the function of collective pitch angle;
Figure 16 represents mark as used herein;
Figure 17 represents to have the even inflow of the 20m/s of negative especially wind shear.Collective pitch regulation.From beginning to be the wind speed of hub and rotor bottom, the helix angle of blade 1 and mean value, the angle of attack of blade 1 and average angle of attack, relative velocity and mean value in the face of blade 1, blade 1 is in the flap moment of root with in the yawing moment of cat head;
Figure 18 represents to have the even inflow of the 20m/s of negative especially wind shear.Individual pitch regulation.From beginning to be the wind speed of hub and rotor bottom, the helix angle of blade 1 and mean value, the angle of attack of blade 1 and average angle of attack, relative velocity and mean value in the face of blade 1, blade 1 is in the flap moment of root with in the yawing moment of cat head;
Figure 19 represents the collective pitch regulation of 30 degree yaw errors and 7m/s.From beginning to be the wind speed and direction of hub, helix angle, blade 1 is in the flap moment of root, cat head heeling moment and cat head yawing moment;
Figure 20 represents the individual pitch regulation of 30 degree yaw errors and 7m/s.From beginning to be the wind speed and direction of hub, helix angle, blade 1 is in the flap moment of root, cat head heeling moment and cat head yawing moment;
Figure 21 represents the collective pitch regulation of 30 degree yaw errors and 25m/s.From beginning to be the wind speed and direction of hub, helix angle, blade 1 is in the flap moment of root, cat head heeling moment and cat head yawing moment;
Figure 22 represents the individual pitch regulation of 30 degree yaw errors and 25m/s.From beginning to be the wind speed and direction of hub, helix angle, blade 1 is in the flap moment of root, cat head heeling moment and cat head yawing moment;
Figure 23 represents the 1HZ equivalent loads of selected sensor; With
Figure 24 represents electric power mean value.10 and the wind speed of 16m/s between can see little difference.
This new load reduction strategy of regulating is preferably based on flowing into the measurement of the parameter angle of attack and relative velocity.Very obvious, between variation that flows into parameter and blade load response, there is very strong correlation, for example referring to Madsen-1991, Fig. 8, and if known inflow, the load that can take measures to alleviate the back increases.
At present, the most direct measured performance to be considered to, the local relative speed of wind and the angle of attack of the single blade that the representative distance that begins from hub is interior.Can use the velocity measuring instrument (see figure 2) that is installed in blade radius 3/4 to 5/6 place's (see figure 1) to do these.The benefit of this system is, the speed and the angle of attack are all measured and can measure in the blade front.This optimum system choosing is designed to make firm and maintains easily.Another kind of method at the blade front measuring wind and the angle of attack is to use the pipe with pressure measuring device.Identical with the principle of velocity measuring instrument, this embodiment is an example design firm and that maintain easily, referring to Fig. 3.
The method of the third measuring speed and the angle of attack is to use the sound wave recording anemometer that is located at the blade front, sees Fig. 4.When using this system, the temperature range of should taking into account system using.
The method of the 4th kind of measuring speed and the angle of attack is by measuring local pressure distribution on blade profile, seeing Fig. 5 a, 5b.
The 5th kind of method of measuring the angle of attack is to use movably trailing edge flap, sees Fig. 6.
The total principle according to the present invention, this method preferably with alleviate dynamic load and keep turbine output output not change or or even the slight mode that increases, use the aerodynamic parameter of being surveyed to control blade incidence.Therefore, the present invention preferably only based on aerodynamic quality and therefore this method preferably do not use for example mechanical load of direct measurement.
Usually, owing to have direct relation between the angle of attack and the aerodynamic lift, if the angle of attack of three blades is identical, the difference of the aerodynamic lift of rotor blade can reduce greatly.According to the preferred embodiments of the invention, a kind of method of doing like this is the error that minimizes between the mean angle of attack of the instant angle of attack of blade and all blades.This can finish by using ratio-monolithic controller for example shown in Figure 7.Beyond the angle of attack, the local velocity on the blade also influences aerodynamic force.Yet because the change of helix angle does not influence rapid change, this measurement signal need be used another kind of control system.Regulating based on the ratio helix angle of difference between local velocity and the blade mean velocity is a kind of suitable method.
An advantage of above-mentioned control system is when proper operation, and the output of the power of turbo machine can not be affected.Power output controller is controlled the collective pitch setting of blade, the invention provides the stack pitch signal of load reduction.Because the angle of attack preferably is adjusted to and can also optimizes collective pitch angle, therefore produce more high-power.The reason of this situation is, local air power distributes and has optimum angle of attack, herein lift height and resistance is low.Under low wind speed, best power output if desired, the collective pitch angle setting can be regulated by mean angle of attack and control.
Because the pass between lift, resistance and the angle of attack ties up to and is highly non-linear in the maximum lift scope, when blade incidence was more stable, above-mentioned load reduction control section was considered to produce better power output performance, therefore has higher lift mean value.
Investigated the several method of structure based on the regulator that flows into.The most promising a kind of method is from the action based on relative velocity, to separate the action of measuring based on the angle of attack.If this is identical according to keep the local angle of attack on all three blades substantially, the supposition that load also can be identical.But this is only effective when not having skew inflow (yaw error, the gradient, rotor tilt etc.) to take place, because this load situation makes relative velocity produce significant change and therefore cause the load of variation on rotor.Skew inflow can compensate by the action based on relative velocity, because the relative velocity that the mobile generation 1P in the rotor cover changes.If helix angle changes in mutually with the variation of relative velocity, load will reduce---this difficulty is to change pitch with minimum as far as possible phase delay and correct mobile range.For the i blade, be shown θ from angle of attack pitch label table partly
δ i, a, be shown θ from the pitch label table of relative velocity part
δ i, bIn addition, it is extremely important to guarantee that action from relative velocity does not influence angle of attack regulator.This will describe afterwards.
Action based on angle of attack measurement
If " it is identical that the angle of attack of all three blades keeps, and load is with identical " is the basic thought of this adjusting part.This is very effective load reduction method, can eliminate the load that is derived from the low frequent turbulence on wind shear or the wind direction.It can be by using pi regulator, and control is finished based on the helix angle of error between the angle of attack of single blade and the mean angle of attack, referring to Fig. 7.The little means of error have produced the system that does not conflict with common pitch regulator between the mean value of the angle of attack on the single blade and all blades by using.Collective pitch regulator control average level, and the difference of individual pitch regulator minimizes blade incidence.Very obvious, can utilize as far as possible little phase delay to finish and measure and action.
Action based on the relative velocity measurement
Compare with the survey angle of attack, seem partly to use PI-base conditioner unit infeasible, because the influence that velocity variations is changed by helix angle hardly to relative velocity.Therefore need use a model-the Ji regulator.Based on simulation, the helix angle significant need changes in mutually with the difference of relative velocity.Crucial to determine suitable pitch range of variables, because this is different from the size that relies on relative velocity in the wind speed and face at least.
The special relative speed of wind regulator that uses in this analysis is based on wind speed and Rotor V in the face
xCalculating.
V
x＝V
relcos(α+θ) (1)
θ
δi，b＝(V
x-V
x，ave)K(ω，θ
col) (2)
(V wherein
x-V
X, ave) be the error between the relative velocity in the centre plane of relative velocity and three blades in the face on the single blade, and K (ω, θ
Col) be gain function.This gain function is function of wind speed substantially, but uses collective pitch angle stronger under high wind speed.This gain function is based on skew inflow and the calculating of being furnished with the turbo machine of circulation pitch regulator, because this adjusting is fit to this inflow of compensation very much, referring to Caselitz-1997 and Bossanyi-2003.Utilize these calculating to find optimum range.By being drawn on, the result determines gain function among Figure 13.Same result has been plotted as the function of spinner velocity and helix angle in Figure 14 and 15, the gain function of derivation formula (3).A concrete feature of non-linear gain function is to have signal gain to change.Helix angle should change and change in mutually with relative velocity under low wind speed, and is being higher than under the specified high wind speed and should changing in anti-phase.
Wherein α and β are the slopes of curve of Figure 14 and 15, K
0Be ω=ω among Figure 15
RefThe gain at place, θ
0Be the helix angle (being about 9 ° among Figure 15) of 0 gain, θ
ColBe collective pitch angle, ω is rotary speed of rotator and ω
RefIt is specified rotary speed of rotator.
How to avoid two interference between the flow conditioner
When turbo machine is worked under skew inflow, relative velocity V in the face
xChange.This variation may cause change in angle of attack, and this helix angle that causes angle of attack regulator to do to make mistake is then regulated.Therefore this by V
xThe variation of the helix angle that changes that the change in angle of attack of determining cause need be eliminated and caused by the relative velocity regulator also needs to eliminate.
According to V
xThe angle of attack variable that changes is roughly
Wherein
Wherein B is a blade quantity.The modification input of angle of attack regulator is
Referring to the explanation of Figure 16 to term.
Owing to measured the angle of attack, therefore can also optimize collective pitch angle, thereby produce more high-power.Its reason is that local air power distributes and to have optimum angle of attack, wherein lift height and resistance is low.Under low wind speed, best power output if desired can be controlled the collective pitch angle setting by the mean angle of attack measurement, sees Fig. 9.
Because the pass between lift, resistance and the angle of attack ties up to the maximum lift zone and is highly non-linear, above-mentioned load reduction control section is considered to, when blade incidence is more stable, can obtain better power output performance, therefore have higher lift mean value, see Figure 10.
The method of control aerodynamic quality
The aerodynamic lift of control blade and the basic skills of resistance are the helix angles by the change individual vanes, as mentioned above.The independent method that changes helix angle is found in for example EP 1 241 350A1, US-5,011,373, EP 0 359 624 B1.
The method of second kind of change aerodynamic load is the profile radian by the ACTIVE CONTROL blade, sees Figure 11.
The third method that changes aerodynamic profile is by wing flap or aileron, sees Figure 12.
Duty factor
By the aeroelasticity simulation, HAWC has compared control system with code, sees Petersen-1997, Larsen-2001.Carried out the simulation of several types, in the wind territory of determining, carried out the performance that different controllers are understood in basic simulation at the beginning, simulated in the turbulent flow at random that in turbo machine reality, can run at last.The turbo machine that uses in the simulation has the specified nominal power of 2～MW.
Shear and yaw error operation
Simulate different controlling methods in a large amount of positions, included nature turbulent flow and no nature turbulent flow.Yet be the basic property of explanation different system, the no turbulent flow simulation in determining the wind territory has been shown in Figure 17 to Figure 22.Should special negative wind shear be similar to positive but have the wind speed of increase, at the hub place than high by 50% in rotor bottom.In having or not turbulent flow simulation, the rotor helical-screw angle is set to 0, because this is basic consistent with yaw error contribution.
In Figure 17, can see the performance of the turbo machine of being furnished with collective pitch regulation.On blade flap moment and cat head yawing moment, can see heavy load.In Figure 18, can see the performance of the turbo machine of being furnished with individual pitch system.Blade flap moment and cat head yawing moment reduce, and the difference of the mean angle of attack of the angle of attack and three blades also reduces.Helix angle is varied non-sinusoidal, and this is the low-down main cause of yawing moment.
In Figure 19 to Figure 22, can see the simulation of turbo machine in yaw error operation.Compare with common pitch system, individual pitch system produces load reduction on blade flap moment, cat head heeling moment and cat head yawing moment.
Fatigue loads calculates
The fatigue loads scope based on IEC61400-1, rank 1B has been calculated in the load of more different controlling methods (common, circulation and independent).Loading condition is normal output situation, has ± 10% yaw error, and wind speed range is 4m/s to 24m/s.The wind condition V of turbo machine rank 1B
Ave=10.0m/s, I
15=0.16, a=3).Roughness length is 0.2m, and this is consistent with the wind shear in specifying in IEC61400.With the Mann modeling turbulent flow, see Mann-1998.
For total fatigue loads of summing up wind turbine alleviates, in Figure 23 and table 1, provide the equivalent loads of selected load sensor.Limit load during operation is shown in Table 2.
The influence of power output is shown among Figure 24.Compare with common pitch regulated, outputs in 20 years of individual pitch have increased by 0.6%.
The contrast of table 1:20 fatigue loads, n=10
7-index
| Sensor | m | Jointly | Independent |
| The blade flap at |
12 | 1.0 | 0.72 |
| Blade pitch is adjusted | 12 | 1.0 | 1.01 |
| Driving |
5 | 1.0 | 1.00 |
| The bending shaft at |
5 | 1.0 | 0.91 |
| Cat head tilts | 5 | 1.0 | 0.69 |
| The |
5 | 1.0 | 0.65 |
| The tower slanted |
5 | 1.0 | 0.78 |
| The |
5 | 1.0 | 0.59 |
Table 2: the contrast-index of limit load during operation
| Sensor | Jointly | Independent |
| The blade flap at hub place | 1.0 | 0.86 |
| Blade pitch is adjusted | 1.0 | 0.94 |
| Driving torque | 1.0 | 0.79 |
| The bending shaft at hub place | 1.0 | 0.98 |
| Cat head tilts | 1.0 | 1.03 |
| The cat head driftage | 1.0 | 0.68 |
| The tower slanted floor | 1.0 | 0.70 |
| The cat head side | 1.0 | 0.64 |
Reference
Madsen-1991：H.A.Madsen.Aerodynamics and Structural Dynamics of aHorizontal Axis Wind Turbine.Risφ-M-2902，Risoe，National Laboratory，February 1991.
Caselitz-1997：P.Caselitz，W.Kleinkauf，T.
J.Petschenka，M.Reichardtand
Reduction of fatigue loads on wind energy converters by advancedcontrol methods.Proceedings of the international conference held in Dublin Castle，Ireland.IWEA 1997
Bossanyi-2003：E.A.Bossanyi.Individual Blade Pitch Control for LoadReduction.Wind Energy，6：119-128.2003
Petersen-1996：J.T.Petersen，The Aeroelastic Code HawC-Model andComparisons.28
th IEA Experts Meeting：‘State of the Art of AeroelasticCodes’.DTU，Lyngby，1996
Larsen-2001：T.J.Larsen.Description of the DLL Regulation Interface inHAWC.Ris-R-1290(en)，Risoe，National Laboratory，september 2001.
Mann-1998：J.Mann.Wind Field Stimulation.Prob.Engng.Mech，ElsevierScience，vol 13(no4)：pp 269-283，1998
Claims (12)
1. an independent control comprises the method for each operational condition of wind turbine of at least two blades, described method comprises step, near each blade, determine at least a Aerodynamic Flows performance, and determine the operating conditions that one or more comprise helix angle for each blade based on the mobile performance of determining
Wherein said helix angle comprises composition of determining based on blade incidence and the composition of determining based on the wind speed of relative blade,
And wherein the composition of determining based on the angle of attack is determined according to the error between the mean angle of attack of the instant angle of attack of blade and all blades.
2. according to the process of claim 1 wherein that the skew inflow condition of the variation by considering to cause the projection of relative velocity on the rotor plane revises the error between the instant angle of attack and the mean angle of attack.
3. according to the method for claim 1 or 2, wherein determine by the difference homophase of relative velocity based on the composition that relative velocity is determined.
4. according to the method for claim 1 or 2, wherein the composition of determining based on relative velocity is determined the error between the speed in the centre plane of relative velocity and all blades in the face of the single blade that work multiplies each other by a gain function.
5. according to the method for claim 1 or 2, wherein this at least one mobile performance comprises the instant angle of attack.
6. according to the method for claim 1 or 2, wherein this at least one mobile performance comprises instant local wind speed.
7. according to the method for claim 1 or 2, wherein this at least one mobile performance is by local measurement.
8. according to the method for claim 1 or 2, wherein these at least two blades can be fixed in hub along the mode that its longitudinal axis independently rotates with each blade, and one or more operating conditions that wherein should determine comprise that the individual pitch angle of each blade and this method comprise each blade is set in individual pitch angle that their are determined.
9. according to the method for claim 1 or 2, wherein each blade has movably wing flap or aileron, and the operating conditions of determining comprises the setting of wing flap movably or aileron.
10. according to the method for claim 5, wherein determine the instant angle of attack by velocity measuring instrument, trailing edge flap hinge, sound wave recording anemometer, the pressure measurement of blade surface, laser Doppler anemometer.
11., wherein measure local wind speed by the pressure measurement that utilizes velocity measuring instrument, sound wave recording anemometer, laser Doppler anemometer, blade surface according to claim 6 method.
12. according to the method for claim 1 or 2, comprise or further comprise one or more following steps,
Write down the air pressure on each blade
Write down the air pressure on each trailing edge
Write down the air pressure on each blade inlet edge
The record mechanical load;
The pressure of record supporting structure
Near or the contiguous wind speed of locating of record wind turbine
The record auxiliary data
Send record data/definite mobile performance to analytical equipment, and/or
The data of analyzing stored in storage device.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DKPA200300249 | 2003-02-18 | ||
| DKPA200300249 | 2003-02-18 | ||
| DKPA200400058 | 2004-01-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1774576A CN1774576A (en) | 2006-05-17 |
| CN100398813C true CN100398813C (en) | 2008-07-02 |
Family
ID=34955717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800074512A Expired - Fee Related CN100398813C (en) | 2003-02-18 | 2004-02-18 | Method of controlling aerodynamic load of a wind turbine based on local blade flow measurement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100398813C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102483038A (en) * | 2009-08-06 | 2012-05-30 | 维斯塔斯风力系统集团公司 | Rotor blade control based on detecting turbulence |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4994947B2 (en) * | 2007-05-21 | 2012-08-08 | 三菱重工業株式会社 | Wind power generator and yaw rotation drive method for wind power generator |
| US7950901B2 (en) * | 2007-08-13 | 2011-05-31 | General Electric Company | System and method for loads reduction in a horizontal-axis wind turbine using upwind information |
| DK2110551T4 (en) * | 2008-04-15 | 2019-05-13 | Siemens Ag | Method and device for forecast-based wind turbine control |
| US20090311097A1 (en) * | 2008-06-13 | 2009-12-17 | General Electric Company | Wind turbine inflow angle monitoring and control system |
| US8057174B2 (en) * | 2008-10-09 | 2011-11-15 | General Electric Company | Method for controlling a wind turbine using a wind flow model |
| SE536174C2 (en) * | 2009-02-09 | 2013-06-11 | Xemc Xiangtan Electric Mfg Group Corp Lt | Method for controlling a wind turbine |
| GB2468693A (en) * | 2009-03-18 | 2010-09-22 | Vestas Wind Sys As | Wind turbine blade control |
| EP2327876A1 (en) * | 2009-11-30 | 2011-06-01 | Lm Glasfiber A/S | Wind turbine blade provided with optical wind velocity measurement system |
| GB2476506A (en) * | 2009-12-23 | 2011-06-29 | Vestas Wind Sys As | Method And Apparatus Protecting Wind Turbines From Low Cycle Fatigue Damage |
| US8308433B2 (en) * | 2010-09-30 | 2012-11-13 | General Electric Company | System and method for controlling wind turbine blades |
| PL2659133T3 (en) * | 2010-12-30 | 2022-05-23 | Lm Wp Patent Holding A/S | Wind turbine blade with cross-sectional sensors |
| CN102635501B (en) * | 2012-04-27 | 2013-07-24 | 中船重工(重庆)海装风电设备有限公司 | Yaw control method, device and system for fans |
| CN106468240A (en) * | 2015-08-20 | 2017-03-01 | 北京博比风电科技有限公司 | A kind of wind generator set blade synergistic device design |
| CN106677978A (en) * | 2015-11-11 | 2017-05-17 | 北京博比风电科技有限公司 | Blade jet-flow synergistic system design for wind generator set |
| CN108005847B (en) * | 2016-11-02 | 2019-08-06 | 远景能源（江苏）有限公司 | Reduce the method for wind turbine loads when non-power generating is run |
| CN109695536B (en) * | 2019-01-27 | 2020-09-04 | 上海理工大学 | Lift type vertical axis wind turbine with swinging type gurney flap device and control method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4161658A (en) * | 1978-06-15 | 1979-07-17 | United Technologies Corporation | Wind turbine generator having integrator tracking |
| US4297076A (en) * | 1979-06-08 | 1981-10-27 | Lockheed Corporation | Wind turbine |
| EP0995904A2 (en) * | 1998-10-20 | 2000-04-26 | Tacke Windenergie GmbH | Wind turbine |
| US6320272B1 (en) * | 1997-03-26 | 2001-11-20 | Forskningscenter Riso | Wind turbine with a wind velocity measurement system |
| US6361275B1 (en) * | 1997-07-25 | 2002-03-26 | Aloys Wobben | Wind energy installation |
-
2004
- 2004-02-18 CN CNB2004800074512A patent/CN100398813C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4161658A (en) * | 1978-06-15 | 1979-07-17 | United Technologies Corporation | Wind turbine generator having integrator tracking |
| US4297076A (en) * | 1979-06-08 | 1981-10-27 | Lockheed Corporation | Wind turbine |
| US6320272B1 (en) * | 1997-03-26 | 2001-11-20 | Forskningscenter Riso | Wind turbine with a wind velocity measurement system |
| US6361275B1 (en) * | 1997-07-25 | 2002-03-26 | Aloys Wobben | Wind energy installation |
| EP0995904A2 (en) * | 1998-10-20 | 2000-04-26 | Tacke Windenergie GmbH | Wind turbine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102483038A (en) * | 2009-08-06 | 2012-05-30 | 维斯塔斯风力系统集团公司 | Rotor blade control based on detecting turbulence |
| CN102483038B (en) * | 2009-08-06 | 2014-10-15 | 维斯塔斯风力系统集团公司 | Rotor blade control based on detecting turbulence |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1774576A (en) | 2006-05-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100398813C (en) | Method of controlling aerodynamic load of a wind turbine based on local blade flow measurement | |
| US7445431B2 (en) | Method of controlling aerodynamic load of a wind turbine based on local blade flow measurement | |
| CN103850876B (en) | A kind of Wind turbines independent pitch control method being applicable to no-load and measuring | |
| Dou et al. | Experimental investigation of the performance and wake effect of a small-scale wind turbine in a wind tunnel | |
| Wen et al. | Design approaches of performance-scaled rotor for wave basin model tests of floating wind turbines | |
| CN107194097A (en) | Analysis method based on wind power plant pneumatic analog and wind speed and direction data | |
| CN109469583B (en) | It is a kind of for slowing down the trailing edge flaps control method of floatation type wind mill wind wheel load fluctuation | |
| CN110849575A (en) | Wind turbine complete machine aerodynamic force measuring system and method | |
| Fu et al. | In-phase and out-of-phase pitch and roll oscillations of model wind turbines within uniform arrays | |
| Mendoza et al. | Improving farm efficiency of interacting vertical‐axis wind turbines through wake deflection using pitched struts | |
| Kimball et al. | Results from the FOCAL experiment campaign 1: turbine control co-design | |
| Wu et al. | Uncertainty prediction on the angle of attack of wind turbine blades based on the field measurements | |
| Sahebzadeh et al. | Impact of relative spacing of two adjacent vertical axis wind turbines on their aerodynamics | |
| Kragh et al. | Individual pitch control based on local and upstream inflow measurements | |
| AU2021321360B2 (en) | A control method for a wind propulsion device on a vessel | |
| Tu et al. | Aerodynamic characterization of two tandem wind turbines under yaw misalignment control using actuator line model | |
| Moreau et al. | Experimental study of two opposed flow directions effect on a ducted twin vertical axis tidal turbine | |
| Robertson et al. | OC6 Phase III Definition Document | |
| Grasso | ECN airfoils for large offshore wind turbines: design and wind tunnel testing | |
| Rasmussen et al. | Soft rotor design for flexible turbines | |
| Mühle | An experimental study on rotor-wake interactions of wind turbines | |
| Zasso et al. | 3D Wind Tunnel Experiments: Measurement Techniques | |
| Johnson et al. | Adaptive torque control of variable speed wind turbines for increased region 2 energy capture | |
| CN116718343A (en) | Test device and method for measuring aerodynamic characteristics of scaled wind power blade under rotation working condition | |
| Astolfi et al. | Numerical and experimental loads analysis on a horizontal-axis wind turbine in yaw |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: DENMARK POLYTECHNIC UNIVERSITY Free format text: FORMER OWNER: RISSO RESEARCH CENTER Effective date: 20071214 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20071214 Address after: Danish spirits Applicant after: Riso Nat Lab Address before: Roskilde Applicant before: Forskningsct Riso |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080702 Termination date: 20150218 |
|
| EXPY | Termination of patent right or utility model |