CN109946475A - Determine the method and device of wind speed - Google Patents
Determine the method and device of wind speed Download PDFInfo
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- CN109946475A CN109946475A CN201711392072.5A CN201711392072A CN109946475A CN 109946475 A CN109946475 A CN 109946475A CN 201711392072 A CN201711392072 A CN 201711392072A CN 109946475 A CN109946475 A CN 109946475A
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- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
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Abstract
The present invention provides a kind of method and device of determining wind speed, wherein the described method includes: obtaining the arrives stream wind speed at any wind power generating set in wind power plant；Determine the wake flow that is formed below by the incoming flow in the wind wheel of any wind power generating set and the view field for scanning plane and intersecting and being formed of the wind wheel of downstream wind power generating set；Determine the wind wheel of the downstream wind power generating set in the sweeping area for scanning and being formed in plane；Determine by the wake flow with it is described scan plane intersect and wind speed in overlapping region between the view field formed and the sweeping area, and the wind speed in the overlapping region is determined as the wind speed at the downstream wind power generating set.The wind speed of each wind power generating set in wind power plant can more precisely be assessed using the method for the invention and device.
Description
Technical field
This application involves technical field of wind power generation more particularly to a kind of method and devices of determining wind speed.
Background technique
As wind generating technology development and land wind power plant resource are fewer and fewer, marine wind electric field is developed into mainstream
Trend.However, the arrangement space of wind power generating set in wind power plant is restricted since maritime environment turbulence intensity is lower,
Influencing each other for flow field between wind power generating set shows to be particularly acute.Upstream and downstream phase between this wind power generating set
The phenomenon that mutually influencing referred to as wake effect.Wake effect is not only aobvious to the effect of aerodynamic performance of the blade of wind power generating set
It writes, and the efficiency that can directly result in wind power generating set is greatly lowered, while the blade of wind power generating set is generated
Fatigue effect, and then reduce blade service life.
Therefore, there is an urgent need to a kind of method and devices that wind speed is determined based on wake effect, so as to building for wind power plant
And if control provides more accurate and reliable data foundation.
Summary of the invention
The purpose of the present invention is to provide a kind of method and devices of determining wind speed.
According to an aspect of of the present present invention, a kind of method of determining wind speed is provided, which comprises obtain appointing in wind power plant
Arrives stream wind speed at one wind power generating set；Determination is formed behind the wind wheel of any wind power generating set by the incoming flow
Wake flow and the view field for scanning plane and intersecting and being formed of the wind wheel of downstream wind power generating set；Determine the downstream wind-force
The wind wheel of generating set is in the sweeping area for scanning and being formed in plane；Determination is intersected by the wake flow with the plane of scanning
And the wind speed in the overlapping region between the view field formed and the sweeping area, and by the wind speed in the overlapping region
The wind speed being determined as at the downstream wind power generating set.
Preferably, determine by the wake flow with it is described scan plane intersect and formed view field the step of include: by
The wake flow is divided into multiple velocity wake regions；Determine that each velocity wake region divided intersects and formed every with the plane of scanning
A view field.
Preferably, determine by the wake flow with it is described scan plane intersect and the view field that is formed and the sweeping area
Between overlapping region in wind speed the step of each of comprise determining that between each view field and the sweeping area
Wind speed in overlapping region；It is opposite respectively based on each overlapping region between each view field and the sweeping area
Each overlay region between the weight possessed by the sweeping area and each view field and the sweeping area
Wind speed in domain, come determine by the wake flow with it is described scan plane intersect and the view field that is formed and the sweeping area it
Between overlapping region in wind speed.
Preferably, the method also includes: according to the wind speed at the downstream wind power generating set, determine the lower urticaria
Turbulence intensity at power generator group；Based on the turbulence intensity at the downstream wind power generating set, the downstream wind-force is corrected
Wind speed at generating set, wind speed and the modified downstream wind power generating set at the downstream wind power generating set
Wind speed between difference be less than predetermined threshold until；It is described by the wind speed output at the modified downstream wind power generating set
Wind speed at the wind power generating set of downstream.
Preferably, the wake flow includes at least one of near-field region, far-field region and Mixed Zone.
According to another aspect of the present invention, a kind of described device of determining wind speed is provided, described device includes: that wind speed obtains list
Member obtains the arrives stream wind speed at any wind power generating set in wind power plant；View field's determination unit is determined by the incoming flow
Plane is scanned in wake flow that the wind wheel of any wind power generating set is formed below and the wind wheel of downstream wind power generating set
The view field of intersection and formation；Sweeping area determination unit determines that the wind wheel of the downstream wind power generating set is swept described
Plunder the sweeping area formed in plane；First wind speed determination unit, determination are intersected and shape by the wake flow with the plane of scanning
At view field and the sweeping area between overlapping region in wind speed, and by the overlapping region wind speed determine
For the wind speed at the downstream wind power generating set.
Preferably, view field's determination unit includes: that velocity wake region divides subelement, the wake flow is divided into more
A velocity wake region；View field determines subelement, determines that each velocity wake region divided intersects and formed with the plane of scanning
Each view field.
Preferably, the first wind speed determination unit includes: that region wind speed determines subelement, determines each projected area
The wind speed in each overlapping region between domain and the sweeping area；Equivalent wind speed determines subelement, is based on each throwing
Each overlapping region between shadow zone domain and the sweeping area be respectively relative to weight possessed by the sweeping area and
The wind speed in each overlapping region between each view field and the sweeping area, to determine by the wake flow and institute
State scan plane intersection and formed view field and the sweeping area between overlapping region in wind speed.
Preferably, described device further include: turbulence intensity determination unit, according to the wind at the downstream wind power generating set
Speed determines the turbulence intensity at the downstream wind power generating set；Wind speed amending unit is based on the downstream wind power generating set
The turbulence intensity at place corrects the wind speed at the downstream wind power generating set, the wind at the downstream wind power generating set
Until the fast difference between the wind speed of the modified downstream wind power generating set is less than predetermined threshold；Second wind speed determines single
Member exports the wind speed at the modified downstream wind power generating set for the wind speed at the downstream wind power generating set.
Preferably, the wake flow includes at least one of near-field region, far-field region and Mixed Zone.
According to another aspect of the present invention, a kind of computer readable storage medium being stored with computer program is provided, institute is worked as
Computer program is stated when being executed by processor, realizes the method for determining wind speed as elucidated before.
According to another aspect of the present invention, a kind of computer equipment is provided, the computer equipment includes: processor；Storage
Device is stored with computer program, when the computer program is executed by processor, realizes and determines wind speed as elucidated before
Method.
The method and device of determining wind speed provided by the present invention can be based on wake effect to each wind-force in wind power plant
The wind speed of generating set is more precisely assessed, thus for the turbulence intensity of wind power plant and assessment and the wind-powered electricity generation of generated energy
Addressing early period of field or rear assessment provide more reliable and accurate data foundation.
Detailed description of the invention
By the description carried out with reference to the accompanying drawing, above and other purpose of the invention and feature will become more clear
Chu, in which:
Fig. 1 is the flow chart for showing the method for determination wind speed of an exemplary embodiment of the present invention；
Fig. 2 is the structural block diagram for showing the device of determination wind speed of an exemplary embodiment of the present invention；
Fig. 3 is to show the incoming flow of an exemplary embodiment of the present invention to be formed below in the wind wheel of wind power generating set
The schematic diagram of wake flow；
Fig. 4 is to show the incoming flow of an exemplary embodiment of the present invention to be formed below in the wind wheel of wind power generating set
The schematic diagram of projection for scanning plane and intersecting and being formed of wake flow and the wind wheel of downstream wind power generating set.
Specific embodiment
Hereinafter, with reference to the accompanying drawings to the embodiment that the present invention will be described in detail.
Fig. 1 is the flow chart for showing the method for determination wind speed of an exemplary embodiment of the present invention.Fig. 2 is to show root
According to the structural block diagram of the device of the determination wind speed of exemplary embodiment of the present invention.It is described in detail hereinafter with reference to Fig. 1 and 2
Determine the implementation process of wind speed.
Referring to Fig.1, the method for the determining wind speed includes the following steps:
In step 110, the arrives stream wind speed at any wind power generating set in wind power plant can be obtained.
In the step 120, it may be determined that the wake flow and downstream that origin stream is formed below in the wind wheel of any wind power generating set
The view field that scanning plane intersection and formation of the wind wheel of wind power generating set.
In step 130, it may be determined that the wind wheel of downstream wind power generating set is swept in the wind wheel of downstream wind power generating set
Plunder the sweeping area formed in plane.
In step 140, it may be determined that intersected and formed by the plane of scanning of wake flow and the wind wheel of downstream wind power generating set
View field and downstream wind power generating set wind wheel sweeping area between overlapping region in wind speed, and by overlay region
Wind speed in domain is determined as the wind speed at the wind power generating set of downstream.
In embodiments of the present invention, according to the distance apart from downstream wind power generating set, by wake flow be divided into near-field region,
Multiple velocity wake regions such as far-field region and Mixed Zone.In one example, rate can be lost according to the speed of wake flow come to wake flow
It is divided.In another example, can according to the energy transmission of wake flow whether with external environment have energy transmission come to wake flow into
Row divides.
It is understood that the wake flow of each velocity wake region divided has different shadows to downstream wind power generating set
It rings.For example, the impeller that near-field region is usually wind power generating set scans the direct tail by blade disturbing influence after plane
Region is flowed, far-field region is usually after the near-field region of wind power generating set by the lesser velocity wake region of external action, mixing
Region is usually wind power generating set and external environment blending act on it is stronger and in far field region except velocity wake region.Cause
This, in the specific implementation, it is contemplated that the velocity wake region with different manifestations feature, which calculates bring to wind speed, to be influenced to come to difference
Velocity wake region modeled, the corresponding wind of different velocity wake regions is then calculated separately based on different wake models again
Speed, and then the wind speed calculated result of different wake models is integrated to obtain final effective wind speed (that is, downstream wind-driven generator
Effective wind speed of the group under wake effect).
It in a preferred embodiment, can in the step 120 will be behind the wind wheel of an incoming flow wind power generating set in office
The wake flow of formation is divided into multiple velocity wake regions, and determines the wind of each velocity wake region and downstream wind power generating set that divide
Each view field for scanning plane intersection and being formed of wheel, as shown in Fig. 4 below, near-field region and downstream wind-force hair
The view field A for scanning plane and being crossed to form of the wind wheel of motor groupK, 1, far-field region and downstream wind power generating set wind wheel
The view field A for scanning plane and being crossed to formK, 2And the wind wheel of Mixed Zone and downstream wind power generating set scans plane
The view field A being crossed to formK, 3。
Further, in this embodiment, each view field and downstream wind power generating set can be determined in step 140
The wind speed in each overlapping region between the sweeping area of wind wheel；And based between each view field and sweeping area
Each overlapping region be respectively relative to weight possessed by sweeping area (e.g., including but be not limited to by overlapping region with scan
Area ratio between region is as the overlapping region relative to weight possessed by sweeping area) and each view field with sweep
The wind speed in each overlapping region between region is plunderred, determines sweeping by wake flow and the wind wheel of downstream wind power generating set to integrate
Plane is plunderred to intersect and the wind speed in the overlapping region between the view field formed and sweeping area.
In addition, can also be by further calculating the turbulence intensity at the wind power generating set of downstream come to downstream wind-driven generator
Wind speed at group is modified, so that the numerical convergence of the wind speed at the wind power generating set of downstream, to further increase
To the accuracy of wind speed assessment.
In an additional preferred embodiment, can also according to step 140 determine downstream wind power generating set at wind speed come
Further determine that the turbulence intensity at the wind power generating set of downstream；Then, based on the turbulence intensity at the wind power generating set of downstream
The wind speed at the wind power generating set of downstream is corrected, the wind speed at the wind power generating set of downstream and modified downstream wind-force are sent out
Until difference between the wind speed of motor group is less than predetermined threshold；Finally, the wind speed at modified downstream wind power generating set is true
The wind speed being set at the wind power generating set of downstream.
It should be understood that when it is implemented, in the method, can individually implement appointing in the embodiment of above-mentioned determining wind speed
Meaning one, can also be combined to the embodiment of above-mentioned determining wind speed to realize the determination to wind speed.
Referring to Fig. 2, the device of determining wind speed according to the present invention may include wind speed acquiring unit 210, view field's determination
Unit 220, sweeping area determination unit 230 and the first wind speed determination unit 240.
Specifically, wind speed acquiring unit 210 can be used for obtaining the wind speed at any wind power generating set in wind power plant；It throws
Shadow area determination unit 220 can be used for determining the wake flow and downstream that origin stream is formed below in the wind wheel of any wind power generating set
The view field that scanning plane intersection and formation of the wind wheel of wind power generating set；Sweeping area determination unit 230 can be used for really
The wind wheel for fixing trip wind power generating set scans the sweeping area formed in plane in the wind wheel of downstream wind power generating set；The
One wind speed determination unit 240, which can be used for determining, to be intersected and is formed by the plane of scanning of wake flow and the wind wheel of downstream wind power generating set
View field and sweeping area between overlapping region in wind speed, and the wind speed in overlapping region is determined as downstream wind-force
Wind speed at generating set.
As previously mentioned, wake flow may include multiple velocity wake regions, and the wake flow of each velocity wake region is to downstream wind-power electricity generation
Unit has different influences.
Therefore, in order to further increase the accuracy assessed wind speed, in a preferred embodiment, projected area
Domain determination unit 220 can also further comprise that velocity wake region divides subelement (not shown) and view field determines subelement (not
It shows).Specifically, velocity wake region divides subelement and can be used for for wake flow being divided into multiple velocity wake regions；View field determines son
Unit can be used for determining that the plane of scanning of each velocity wake region and the wind wheel of downstream wind power generating set of division intersects and formed
Each view field, as shown in Fig. 4 below, the wind wheel of near-field region and downstream wind power generating set scans plane
The view field A being crossed to formK, 1, far-field region and downstream wind power generating set wind wheel the throwing scanning plane and being crossed to form
Shadow zone domain AK, 2And the view field A for scanning plane and being crossed to form of Mixed Zone and the wind wheel of downstream wind power generating setK, 3。
Further, in this embodiment, the first wind speed determination unit 240 can also further comprise that region wind speed determines son
Unit (not shown) and equivalent wind speed determine subelement (not shown).Specifically, region wind speed determines that subelement can be used for determining
The wind speed in each overlapping region between each view field and sweeping area；Equivalent wind speed determines that subelement can be used for being based on
Each overlapping region between each view field and sweeping area be respectively relative to weight possessed by sweeping area (for example,
Including but not limited to had using the area ratio between overlapping region and sweeping area as the overlapping region relative to sweeping area
Some weights) and each view field and sweeping area between each overlapping region in wind speed, come integrate determine by tail
It flows and intersects and overlapping between the view field formed and sweeping area with the plane of scanning of the wind wheel of downstream wind power generating set
Wind speed in region.
In addition, as previously mentioned, can also be further by calculating the turbulence intensity at the wind power generating set of downstream come to downstream
Wind speed at wind power generating set is modified, so that the numerical convergence of the wind speed at the wind power generating set of downstream, thus
Further increase the accuracy to wind speed assessment.
In an additional preferred embodiment, described device can also further comprise: turbulence intensity determination unit (not shown),
Wind speed amending unit (not shown) and the second wind speed determination unit (not shown).Specifically, turbulence intensity determination unit is used for root
The turbulence intensity at the wind power generating set of downstream is determined according to the wind speed at the wind power generating set of downstream；Wind speed amending unit is used for
The wind speed at the wind power generating set of downstream is corrected based on the turbulence intensity at the wind power generating set of downstream, until downstream wind-force is sent out
Until wind speed at motor group and the difference between the wind speed of modified downstream wind power generating set are less than predetermined threshold；Second wind speed
Determination unit is used to for the wind speed at modified downstream wind power generating set to be determined as the wind speed at the wind power generating set of downstream.
It should be understood that when it is implemented, in said device, can individually implement appointing in the embodiment of above-mentioned determining wind speed
Meaning one, can also be combined to the embodiment of above-mentioned determining wind speed to realize the determination to wind speed.
Fig. 3 is to show the incoming flow of an exemplary embodiment of the present invention to be formed below in the wind wheel of wind power generating set
The schematic diagram of wake flow.Fig. 4 is to show the incoming flow of an exemplary embodiment of the present invention behind the wind wheel of wind power generating set
The schematic diagram of projection for scanning plane and intersecting and being formed of the wake flow of formation and the wind wheel of downstream wind power generating set.It below will ginseng
One specific implementation process of determining wind speed is described in further detail according to Fig. 3 and 4.
As shown in figure 3, when (its wind speed is U to incoming flowi) blow to wind power generating set turbineiWhen, incoming flow wind is sent out in wind-force
Motor group turbineiThe wake flow of the strip as illustrated in the drawing formed below, the wake flow can be divided into near-field region (such as
The most deep part of color shown in Fig. 3), far-field region (the slightly shallow part of color as shown in Figure 3) and Mixed Zone is (such as
Color shown in Fig. 3 is close to the part of white) three velocity wake regions.
As shown in figure 4, each velocity wake region divided is (that is, near-field region, far-field region shown in Fig. 3 and mixed zone
Domain) and downstream wind power generating set turbinekWind wheel scanning plane intersection and formed view field AK, 1、AK, 2And AK, 3
With downstream wind power generating set turbinekWind wheel sweeping area AkIt overlaps (that is, overlay region shown in Fig. 4
Domain AOverlap, k, 1、AOverlap, k, 2And AOverlap, k, 3)。
When it is implemented, the public affairs being related in following specific implementation process can be used in the method and device of the determining wind speed
Formula is implemented:
Firstly, following formula (1) can be used to determine wind power generating set turbineiDifferent velocity wake region j it is corresponding
(that is, near-field region, far-field region and Mixed Zone are corresponding) wake flow lose coefficient:
Wherein, cW, i, jFor wind power generating set turbineiThe corresponding wake flow of different velocity wake region j lose coefficient, Di
For wind power generating set turbineiWind wheel diameter, kE, iFor wind power generating set turbineiInitial wake flow expand system
Number, XiFor wind power generating set turbineiSeat in the plane point abscissa, x be velocity wake region in any point abscissa, x-
XiFor any point to wind power generating set turbineiSeat in the plane point distance, mU, j(γi) be and wind power generating set
turbineiDifferent velocity wake region j yaw angle related coefficient (itself and yaw angle γiIt is linearly related).
Then, coefficient c can be lost based on the wake flow obtained by formula (1)W, i, jDistinguished using following formula (2) and (3)
Determine wind power generating set turbineiDifferent corresponding wind speed of velocity wake region j and wind power generating set turbinei
The width of different velocity wake region j:
UW, i, j=Ui(1-2aicW, i, j) (2)
DW, i, j=max (Di+2kE, imE, j(x-Xi), 0) (3)
Wherein, UW, i, jFor wind power generating set turbineiThe corresponding wind speed of different velocity wake region j, aiIt is axial induction
The factor (it can be tabled look-up according to wind speed to be obtained), UiFor wind power generating set turbineiThe wind speed at place, cW, i, jIt is different
The corresponding wake flow of velocity wake region j loses coefficient.
Wherein, DW, i, jFor wind power generating set turbineiDifferent velocity wake region j width (as shown in Figure 3
The wake flow width D of near-field regionW, i, 1, far-field region wake flow width DW, i, 2And the wake flow width D of Mixed ZoneW, i, 3), Di
For wind power generating set turbineiWind wheel diameter, mE, jFor wind power generating set turbineiDifferent velocity wake region j
Corresponding wake flow widths affect coefficient, kE, iFor wind power generating set turbineiThe wake flow coefficient of expansion, XiFor wind-power electricity generation
Unit turbineiSeat in the plane point abscissa, x be velocity wake region in any point abscissa, x-XiIt is arrived for any point
Wind power generating set turbineiSeat in the plane point distance.
Further, following formula (4), (5) and (6) can be used to determine wind power generating set turbineiWake flow it is inclined
(it is mainly by yaw angle ξ for shiftingiIt is caused with coriolis force (that is, earth rotation)):
ΔRotate, i=ad+bd(x-Xi) (5)
YW, i=Yi+ΔYaw, i+ΔRotate, i (6)
Wherein, ΔYaw, iFor by yaw angle ξi(x) offset caused by, ξiIt (x) is wake flow centerlines, XiFor wind-force hair
Motor group turbineiSeat in the plane point abscissa, x be velocity wake region in any point abscissa, x-XiFor any point
To wind power generating set turbineiSeat in the plane point distance.
Wherein, ΔRotate, iFor the offset as caused by coriolis force, ad、bdFor rotation offset linear equation coefficient, XiFor wind
Power generator group turbineiSeat in the plane point abscissa, x be velocity wake region in any point abscissa, x-XiIt is any
A little arrive wind power generating set turbineiSeat in the plane point distance.
Wherein, YW, iFor wind power generating set turbineiWake flow offset, YiiFor wind power generating set turbineiMachine
The ordinate in site, ΔYaw, iFor the offset as caused by yaw angle, ΔRotate, iFor the offset as caused by coriolis force.
Further, wind power generating set turbine can be based oniWake flow offset, wind power generating set turbineiNo
With the wake flow width D of velocity wake region jW, i, jWith downstream wind power generating set turbinekRotor swept region AkTo determine wind-force
Generating set turbineiDifferent velocity wake region j and downstream wind power generating set turbineiWind wheel sweeping area phase
The view field A for handing over and being formedK, 1、AK, 2And AK, 3With downstream wind power generating set turbinekWind wheel sweeping area AkBetween
Overlapping region AOverlap, k, j, then by wind power generating set turbineiDifferent velocity wake region j view field AK, 1、AK, 2
And AK, 3With downstream wind power generating set turbinekWind wheel sweeping area AkBetween overlapping region AOverlap, k, jWith downstream
Wind power generating set turbineiWind wheel sweeping area AkBetween area ratio as wind power generating set turbineiNo
The corresponding wind velocity U with velocity wake region jW, i, jWeight determine downstream wind power generating set turbine to integratekThe wind speed at place.
Specifically, following formula (7) can be used to determine downstream wind power generating set turbinekThe wind speed at place:
Wherein, UEff, kFor downstream wind power generating set turbinekThe wind speed at place, AkFor downstream wind power generating set
turbinekWind wheel sweeping area size, AOver1ap, k, jWith AkRatio indicate wind power generating set turbineiNo
With the view field A of velocity wake region jK, 1、AK, 2And AK, 3With downstream wind power generating set turbinekWind wheel sweeping area Ak
Between overlapping region AOverlap, k, jWith downstream wind power generating set turbineiWind wheel sweeping area AkBetween area
Than.akFor downstream wind power generating set turbinekAxial inducible factor (it can be according to wind velocity UiIt tables look-up to be obtained).cW, i, j
For wind power generating set turbineiWake flow in different velocity wake region j in downstream wind power generating set turbinekPlace
Wake flow loses coefficient, XiAnd XkRespectively wind power generating set turbineiWith downstream wind power generating set turbinekSeat in the plane
The abscissa of point, Xi< XkIndicate downstream wind power generating set turbinekSeat in the plane point relative to wind power generating set
turbineiSeat in the plane point downstream direction.
It further, can also be based on the downstream wind power generating set determined in order to determine more accurate air speed value
turbinekThe wind velocity U at placeEff, kDetermine downstream wind power generating set turbinekThe additional turbulence intensity at place, to use determination
Additional turbulence intensity correct wind power generating set turbineiThe initial wake flow coefficient of expansion:
Wherein, kE, iFor wind power generating set turbineiThe wake flow coefficient of expansion, TAdd, kFor downstream wind power generating set
turbinekThe additional turbulence intensity at place, UEff, kFor downstream wind power generating set turbinekThe reference turbulence intensity at place, Tambient
And TrefRespectively ambient turbulence intensity and refer to turbulence intensity, a, b be constant, CT, iFor wind power generating set turbinekPush away
Force coefficient (it can be tabled look-up according to wind speed to be obtained).
The wind power generating set turbine that can be obtained based on above-mentioned formula (10)iWake flow coefficient of expansion kE, i, in use
It states formula (7) and calculates downstream wind power generating set turbine againkThe wind velocity U at placeEff, k, and the downstream wind-force that will be calculated again
Generating set turbinekThe wind velocity U at placeEdd, kWith the downstream wind power generating set turbine being previously calculatedkThe wind velocity U at placeEff, k
It is compared, when difference between the two meets predetermined threshold, the downstream wind power generating set turbine that will calculate againk
The wind velocity U at placeEff, kIt is determined as downstream wind power generating set turbinekThe wind velocity U at placeEff, k；Otherwise, front institute will be repeated
The calculating process for the wake flow coefficient of expansion stated continues iteration convergence.It is this to be based further on effective turbulence intensity and come to wind speed
UEff, kThe process for being iterated calculating can further improve the accuracy of wind speed assessment.
It can thus be seen that above-mentioned implementation is by being divided into three different velocity wake regions for the wake flow of wind power generating set,
Its influence to downstream Wind turbines is considered respectively, and based on the wind speed that downstream wind power generating set is calculated.This method pair
The calculating of the wind speed of each wind power generating set in wind power plant is more accurate, to be the turbulence intensity and generated energy of wind power plant
Assessment and wind power plant addressing early period or rear assessment provide more reliable and accurate data foundation.
It is above-mentioned to be realized in hardware, firmware according to the method for the present invention, or be implemented as being storable in recording medium
Software or computer code in (such as CD ROM, RAM, floppy disk, hard disk or magneto-optic disk), or it is implemented through network downloading
Original storage in long-range recording medium or nonvolatile machine readable media and the meter that will be stored in local recording medium
Calculation machine code, so that method described herein can be stored in using general purpose computer, application specific processor or programmable or specially
It is handled with such software in the recording medium of hardware (such as ASIC or FPGA).It is appreciated that computer, processor, micro-
Processor controller or programmable hardware include can store or receive software or computer code storage assembly (for example, RAM,
ROM, flash memory etc.), when the software or computer code are by computer, processor or hardware access and execute, realize herein
The processing method of description.In addition, when general purpose computer accesses the code for realizing the processing being shown here, the execution of code
General purpose computer is converted to the special purpose computer for being used for executing the processing being shown here.
Although show and describing the present invention with reference to preferred embodiment, it will be understood by those skilled in the art that not
In the case where being detached from the spirit and scope of the present invention that are defined by the claims, these embodiments can be carry out various modifications and
Transformation.
Claims (12)
1. a kind of method of determining wind speed, which is characterized in that the described method includes:
Obtain the arrives stream wind speed at any wind power generating set in wind power plant；
Determine the wake flow and downstream wind-driven generator formed below by the incoming flow in the wind wheel of any wind power generating set
The view field that scanning plane intersection and formation of the wind wheel of group；
Determine the wind wheel of the downstream wind power generating set in the sweeping area for scanning and being formed in plane；
It determines and is intersected and overlapping between the view field formed and the sweeping area by the wake flow with the plane of scanning
Wind speed in region, and the wind speed in the overlapping region is determined as the wind speed at the downstream wind power generating set.
2. the method as described in claim 1, which is characterized in that determine and intersected and formed with the plane of scanning by the wake flow
View field the step of include:
The wake flow is divided into multiple velocity wake regions；
Determine each velocity wake region and each view field for scanning plane and intersecting and being formed divided.
3. method according to claim 2, which is characterized in that determine and intersected and formed with the plane of scanning by the wake flow
View field and the sweeping area between overlapping region in wind speed the step of include:
Determine the wind speed in each overlapping region between each view field and the sweeping area；
The sweep area is respectively relative to based on each overlapping region between each view field and the sweeping area
The wind speed in each overlapping region between weight possessed by domain and each view field and the sweeping area comes
Determine by the wake flow with it is described scan plane intersect and overlapping region between the view field formed and the sweeping area
In wind speed.
4. the method as described in claim 1, which is characterized in that the method also includes:
According to the wind speed at the downstream wind power generating set, the turbulence intensity at the downstream wind power generating set is determined；
Based on the turbulence intensity at the downstream wind power generating set, the wind speed at the downstream wind power generating set is corrected, directly
Wind speed at the downstream wind power generating set and the difference between the wind speed of the modified downstream wind power generating set are less than
Until predetermined threshold；
Wind speed wind speed at the modified downstream wind power generating set being determined as at the downstream wind power generating set.
5. method described in any one in Claims 1 to 4, which is characterized in that the wake flow includes near-field region, far field
At least one of region and Mixed Zone.
6. a kind of device of determining wind speed, which is characterized in that described device includes:
Wind speed acquiring unit obtains the arrives stream wind speed at any wind power generating set in wind power plant；
View field's determination unit determines the wake flow formed below by the incoming flow in the wind wheel of any wind power generating set
With the view field for scanning plane and intersecting and being formed of the wind wheel of downstream wind power generating set；
Sweeping area determination unit determines that the wind wheel of the downstream wind power generating set scans scanning of being formed in plane described
Region；
First wind speed determination unit determines and is scanned the view field that plane intersects and formed with described by the wake flow and swept with described
The wind speed in the overlapping region between region is plunderred, and the wind speed in the overlapping region is determined as the downstream wind-driven generator
Wind speed at group.
7. device as claimed in claim 6, which is characterized in that view field's determination unit includes:
Velocity wake region divides subelement, and the wake flow is divided into multiple velocity wake regions；
View field determines subelement, determines each velocity wake region for dividing and each throwing for scanning plane and intersecting and being formed
Shadow zone domain.
8. device as claimed in claim 7, which is characterized in that the first wind speed determination unit includes:
Region wind speed determines subelement, determines in each overlapping region between each view field and the sweeping area
Wind speed；
Equivalent wind speed determines subelement, based on each overlapping region between each view field and the sweeping area point
Not relative to each of between weight possessed by the sweeping area and each view field and the sweeping area
Wind speed in overlapping region is scanned the view field that plane intersects and formed and scanned with described by the wake flow to determine with described
The wind speed in overlapping region between region.
9. device as claimed in claim 6, which is characterized in that described device further include:
Turbulence intensity determination unit determines the downstream wind-driven generator according to the wind speed at the downstream wind power generating set
Turbulence intensity at group；
Wind speed amending unit corrects the downstream wind-driven generator based on the turbulence intensity at the downstream wind power generating set
Wind speed at group, the wind speed of wind speed and the modified downstream wind power generating set at the downstream wind power generating set
Between difference be less than predetermined threshold until；
Second wind speed determination unit exports the wind speed at the modified downstream wind power generating set for downstream wind-force hair
Wind speed at motor group.
10. device described in any one in claim 6~9, which is characterized in that the wake flow includes near-field region, remote
At least one of field areas and Mixed Zone.
11. a kind of computer readable storage medium for being stored with computer program, which is characterized in that when the computer program exists
The method of the determination wind speed as described in any one in claim 1-5 is realized when being executed by processor.
12. a kind of computer equipment, which is characterized in that the computer equipment includes:
Processor；
Memory is stored with computer program, when the computer program is executed by processor, realizes such as claim 1-5
In any one described in determination wind speed method.
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| CN201711392072.5A CN109946475B (en) | 2017-12-21 | 2017-12-21 | Method and device for determining wind speed |
| PCT/CN2018/087597 WO2019119722A1 (en) | 2017-12-21 | 2018-05-21 | Method and device for determining wind speed |
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