CN109802440A - Marine wind electric field equivalence method, system and device based on the wake effect factor - Google Patents
Marine wind electric field equivalence method, system and device based on the wake effect factor Download PDFInfo
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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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
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Abstract
The invention discloses a kind of marine wind electric field equivalence method, system and devices based on the wake effect factor, wherein, it the described method comprises the following steps: obtaining offshore wind farm field parameters, wherein, offshore wind farm field parameters include the arrives stream wind speed of marine wind electric field, in marine wind electric field every Wind turbines location information, wind wheel radius, attenuation constant and thrust coefficient；The wake effect factor of every Wind turbines is determined according to offshore wind farm field parameters；A point group is carried out according to the Wind turbines in wake effect factor pair offshore wind farm；Calculate separately the equivalent parameters of each wind turbine group；Marine wind electric field Equivalent Model is established according to each wind turbine group and its equivalent parameters.The method is simple and easy to implement, and committed memory space is less and accuracy is higher, is applicable to the research of extensive offshore wind farm.
Description
Technical field
The present invention relates to technical field of wind power generation more particularly to a kind of marine wind electric fields etc. based on the wake effect factor
It is worth mthods, systems and devices.
Background technique
Relative to land wind-power electricity generation, Oversea wind power generation is mainly manifested in there are many clear superiorities: (1) sea turn
Power machine can reduce the occupancy to land land resource, and marine large stretch of continuous space with suitable large-scale wind electricity engineering,
It is very suitable to the foundation of Large Scale Wind Farm Integration；(2) compared with land wind-powered electricity generation, offshore wind farm is close to traditional power load center, benefit
In the consumption of power grid and reduction long distance powedr transmission bring cost of investment and power consumption；(3) the land wind speed of sea turn speed ratio is wanted
It is higher by 20%~100%, generating efficiency can also correspondingly increase, and in most cases, and the flat wind speed in sea is stablized, and be conducive to
Wind energy conversion system more effectively more makes full use of wind energy and reduces the fatigue load on wind energy conversion system, the final service life for improving wind energy conversion system and
Generate more electric energy.
There are the Wind turbines of a large amount of dispersed placements in Large Scale Offshore Wind Farm, under the effect of a certain wind direction, is seated leeward
To the wind speed of Wind turbines be often below and be seated the wind speed of upwind Wind turbines, this phenomenon is referred to as wake effect,
The main reason for it is energy loss in marine wind electric field.Meanwhile the emulation of Large Scale Offshore Wind Farm often has hundreds wind-powered electricity generation
Unit can cause to calculate if all built the model of each Wind turbines in detail to the complexity for greatly increasing emulation
Time is long, resource utilization is low, even results in " dimension calamity ".
For this purpose, carrying out equivalent modeling to wind power plant in the related technology, and wake effect is considered in wind power plant equivalence, it should
Technology carries out a point group on the basis of wind speed, has finally carried out equivalence to entire wind power plant, and it all calculates every Wind turbines
Real-time wake effect, it is computationally intensive high with the complexity of model, do not account for the coverage of wake effect yet.Separately
Outside, which takes k mean algorithm to carry out a point group, although calculating is simple and easy to do, accuracy is not high, is easily trapped into part most
It is excellent.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention
One purpose is to propose a kind of marine wind electric field equivalence method based on the wake effect factor, and the method is simple and easy to implement, accounts for
With memory headroom, less and accuracy is higher, is applicable to the research of extensive offshore wind farm.
In order to achieve the above objectives, first aspect present invention embodiment proposes a kind of sea turn based on the wake effect factor
Electric field equivalence method, comprising the following steps: obtain offshore wind farm field parameters, wherein the offshore wind farm field parameters include sea
It the location information of every Wind turbines, wind wheel radius, attenuation constant and is pushed away in the arrives stream wind speed of wind power plant, the marine wind electric field
Force coefficient；The wake effect factor of every Wind turbines is determined according to the offshore wind farm field parameters；According to the wake effect
Wind turbines in offshore wind farm described in factor pair carry out a point group；Calculate separately the equivalent parameters of each wind turbine group；According to
Each wind turbine group and its equivalent parameters establish marine wind electric field Equivalent Model.
The marine wind electric field equivalence method based on the wake effect factor of the embodiment of the present invention, using the wake effect factor as machine
Component group principle carries out a point group to Wind turbines, and then calculates the equivalent parameters of each machine group, and according to grouping result and wait
Value parameter establishes the marine wind electric field Equivalent Model based on the wake effect factor, and the method is simple and easy to implement, committed memory space
Less and accuracy is higher, is applicable to the research of extensive offshore wind farm.
In addition, the marine wind electric field equivalence method based on the wake effect factor of the above embodiment of the present invention can also have
Following additional technical characteristic:
Optionally, the wake effect factor that every Wind turbines are determined according to the offshore wind farm field parameters, comprising:
The wake effect influence degree of every Wind turbines is calculated according to the offshore wind farm field parameters；It is influenced according to the wake effect
Degree determines the wake effect factor of every Wind turbines.
Optionally, the wake effect influence degree of every Wind turbines is calculated by following formula:
Wherein, σiFor the wake effect influence degree of i-th Wind turbines, vinFor the arrives stream wind speed, viFor the i-th typhoon
Wind speed at motor group, i=1,2 ..., n, n are the quantity of Wind turbines in the marine wind electric field.
Optionally, the wake effect factor and the wake effect influence degree negative correlation.
Optionally, when wake effect influence degree is greater than the first preset value, determine that the wake effect factor is 0；Work as wake flow
When effects degree is greater than the second preset value and is less than or equal to first preset value, determine that the wake effect factor is 1；
When wake effect influence degree be greater than third preset value and be less than or equal to second preset value when, determine wake effect because
Son is 2；When wake effect influence degree is less than or equal to the third preset value, determine that the wake effect factor is 3.
Optionally, first preset value is 0.95, and second preset value is 0.7, and the third preset value is 0.4.
Optionally, the Wind turbines in the offshore wind farm according to the wake effect factor pair carry out a point group, packet
It includes: randomly choosing one from the n wake effect factor and be used as the first cluster centre Y1, and calculate remaining n-1 wake flow effect
Answer the distance between the factor and Y1；Select and Y1 apart from the maximum wake effect factor as the second cluster centre Y2, and respectively
Calculate the distance between the n-2 wake effect factor and Y1, Y2 in addition to Y1, Y2 D1 (xj, Y1) and D2 (xj, Y2), wherein j
=1,2 ..., n-2；Min [D1 (x is successively selected from big to smallj,Y1),D2(xj, Y2)] in the wake effect factor as next
A cluster centre, until the number of cluster centre reaches m；According to selected m cluster centre using k mean algorithm to n
A Wind turbines carry out a point group.
Optionally, the equivalent parameters include generator equivalent parameters, transformer equivalent parameters, wind speed equivalence parameter and control
Equivalent parameters processed, wherein the generator equivalent parameters are as follows:
Wherein, S and SeqRespectively indicate the generator capacity before and after equivalence, xmAnd xm_eqRespectively indicate the power generation before and after equivalence
Machine excitation reactance, x1And x1_eqRespectively indicate the generator unit stator reactance before and after equivalence, x2And x2_eqBefore and after respectively indicating equivalence
Generator amature reactance, r1And r1_eqRespectively indicate the generator unit stator resistance before and after equivalence, r2And r2_eqBefore respectively indicating equivalence
Generator amature resistance afterwards；
The transformer equivalent parameters are as follows:
Wherein, STAnd ST_eqRespectively indicate the transformer capacity before and after equivalence, ZTAnd ZT_eqRespectively indicate the change before and after equivalence
Depressor impedance；
When calculating the wind speed equivalence parameter, first wind speed and wind speed-power curve according at every Wind turbines is true
The power of fixed every Wind turbines, calculates the average value of the power, further according to the average value, the wind speed-power curve
Determine the wind speed equivalence parameter；
S in the control equivalent parameterseq=mS, other are identical as the control parameter before equivalence.
In order to achieve the above objectives, second aspect of the present invention embodiment proposes a kind of sea turn based on the wake effect factor
The valve systems such as electric field, comprising: module is obtained, for obtaining offshore wind farm field parameters, wherein the offshore wind farm field parameters include
The location information of every Wind turbines, wind wheel radius, attenuation constant in the arrives stream wind speed of marine wind electric field, the marine wind electric field
And thrust coefficient；Determining module, for determining the wake effect factor of every Wind turbines according to the offshore wind farm field parameters；
Grouping module carries out a point group for the Wind turbines in the offshore wind farm according to the wake effect factor pair；Computing module,
For calculating separately the equivalent parameters of each wind turbine group；Modeling module, for according to each wind turbine group and its
Equivalent parameters establish marine wind electric field Equivalent Model.
The valve systems such as the marine wind electric field based on the wake effect factor of the embodiment of the present invention, using wake flow Reliability equivalence factor as machine
Component group principle carries out a point group to Wind turbines, and then calculates the equivalent parameters of each machine group, and according to grouping result and wait
Value parameter establishes the marine wind electric field Equivalent Model based on the wake effect factor, which simply easily realizes, committed memory space
Less and accuracy is higher, is applicable to the research of extensive offshore wind farm.
In order to achieve the above objectives, third aspect present invention embodiment proposes a kind of sea turn based on the wake effect factor
Electric field equivalence device, including memory, processor and the computer program being stored on the memory, the computer journey
When sequence is executed by the processor, the above-mentioned marine wind electric field equivalence method based on the wake effect factor is realized.
The marine wind electric field equivalence device based on the wake effect factor of the embodiment of the present invention, stores on its memory
When computer program corresponding with the above-mentioned marine wind electric field equivalence method based on the wake effect factor is executed by processor, obtain
Equivalent Model precision is high, committed memory is few, and it is simple easily realize, be applicable to the research of extensive offshore wind farm.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Fig. 1 is the flow chart of the marine wind electric field equivalence method according to an embodiment of the present invention based on the wake effect factor；
Fig. 2 is the schematic diagram of wake effect Jensen model；
Fig. 3 is the schematic diagram of wake effect between an exemplary Wind turbines according to the present invention；
Fig. 4 is the marine wind electric field equivalence method based on the wake effect factor accord to a specific embodiment of that present invention
Flow chart；
Fig. 5 is the structural frames of the valve systems such as the marine wind electric field according to an embodiment of the present invention based on the wake effect factor
Figure；And
Fig. 6 is the structural frames of the marine wind electric field equivalence device according to an embodiment of the present invention based on the wake effect factor
Figure.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings it describes the marine wind electric field equivalence method based on the wake effect factor of the embodiment of the present invention, be
System and device.
Embodiment 1
Fig. 1 is the flow chart of the marine wind electric field equivalence method based on the wake effect factor of the embodiment of the present invention.
As shown in Figure 1, the marine wind electric field equivalence method based on the wake effect factor the following steps are included:
S1 obtains offshore wind farm field parameters.
Wherein, offshore wind farm field parameters include arrives stream wind speed (size and side including arrives stream wind speed of marine wind electric field
To), in marine wind electric field every Wind turbines location information, wind wheel radius, attenuation constant and thrust coefficient.
In this embodiment, the Wind turbines in marine wind electric field are preferably double-fed wind generator unit.
S2 determines the wake effect factor of every Wind turbines according to offshore wind farm field parameters.
Specifically, the wake effect influence degree of every Wind turbines can be first calculated according to offshore wind farm field parameters, then
The wake effect factor of every Wind turbines is determined further according to wake effect influence degree.
Wherein, the wake effect influence degree of every Wind turbines can be calculated by following formula:
Wherein, σiFor wake effect influence degree, vinFor the arrives stream wind speed, viFor the wind speed at i-th Wind turbines,
I=1,2 ..., n, n are the quantity of Wind turbines in the marine wind electric field.
In one embodiment of the invention, the wake effect factor and wake effect influence degree can negative correlation,
For example, the wake effect factor and wake effect influence degree are reciprocal each other.
In another embodiment of the present invention, when wake effect influence degree is greater than the first preset value, wake flow is determined
Effector is 0；When wake effect influence degree is greater than the second preset value and is less than or equal to the first preset value, tail is determined
Flowing effector is 1；When wake effect influence degree is greater than third preset value and is less than or equal to the second preset value, determine
The wake effect factor is 2；When wake effect influence degree is less than or equal to third preset value, determine that the wake effect factor is
3。
Wherein, the first preset value can be 0.95, and the second preset value can be 0.7, and third preset value can be 0.4.
Above-mentioned wake effect influence degree and the wake effect factor for ease of understanding, are illustrated referring to Fig. 2, Fig. 3:
As shown in Fig. 2, r is its wind wheel radius (i.e. the rotor radius of wind turbine), and x is for a Wind turbines
Along the horizontal distance of wind direction, vinFor the arrives stream wind speed of marine wind electric field, vxFor actual wind speed of the arrives stream wind speed under wake effect,
K is attenuation constant, CTFor thrust coefficient, then have For
The Wind turbines are wake effect influence degree.
At sea in wind power plant, every Wind turbines may all be influenced by upstream Wind turbines, separate unit Wind turbines
It may be influenced by the wake effect of more units.It can determine downstream according to the position of arrives stream wind speed and each Wind turbines
Unit is influenced situation by upstream unit, as shown in figure 3, unit W3 is only influenced by unit W1, the wake effect factor is only
Include unit W1；Joint effect of the unit W4 by unit W1 and W2, the wake effect factor are unit W1 and W2 independent role
Under the sum of influence.
S3 carries out a point group according to the Wind turbines in wake effect factor pair offshore wind farm.
Specifically, one is randomly choosed from the n wake effect factor and be used as the first cluster centre Y1, and calculate remaining
The distance between the n-1 wake effect factor and Y1；Select and Y1 apart from the maximum wake effect factor as second cluster in
Heart Y2, and calculate separately the distance between the n-2 wake effect factor and Y1, Y2 in addition to Y1, Y2 D1 (xj, Y1) and D2
(xj, Y2), wherein j=1,2 ..., n-2；Min [D1 (x is successively selected from big to smallj,Y1),D2(xj, Y2)] in wake flow effect
Answer the factor as next cluster centre, until the number of cluster centre reaches m；It is adopted according to selected m cluster centre
A point group is carried out to n Wind turbines with k mean algorithm.
It should be noted that the initialization of traditional k mean algorithm be it is random, may result in finally that divide group not be very
Accurately, for this point, the present invention takes max-min distance means to dividing group's data to initialize.Minimax distance is initial
Change method is a kind of exploratory algorithm, and the thought of the algorithm is to fetch as far as possible according to concentration apart from the farther away object of other objects
As initial point, so as to avoid randomness initialize in occur initial point too close to the case where, pass through this thought
Guidance, can effectively improve the efficiency and quality of initialization data set.That is, having compared to traditional k mean algorithm
It, can be efficiently against the dependence for initial center point, to effectively improve in the case where one preferable initial solution
Convergence speed of the algorithm and accuracy.
S4 calculates separately the equivalent parameters of each wind turbine group.
Specifically, after obtaining grouping result, equivalence is carried out to each wind turbine group, i.e., by entire marine wind electric field
Equivalence is m Wind turbines, the method that capacity weighting can be used when calculating equivalent parameters, because in the same marine wind electric field
In, each Wind turbines generally all have same model and capacity, and structure is similar with operating condition.
Wherein, equivalent parameters may include generator equivalent parameters, transformer equivalent parameters, wind speed equivalence parameter and control etc.
Value parameter, specific equivalence relation are as follows:
Generator equivalent parameters:
Wherein, S and SeqRespectively indicate the generator capacity before and after equivalence, xmAnd xm_eqRespectively indicate the power generation before and after equivalence
Machine excitation reactance, x1And x1_eqRespectively indicate the generator unit stator reactance before and after equivalence, x2And x2_eqBefore and after respectively indicating equivalence
Generator amature reactance, r1And r1_eqRespectively indicate the generator unit stator resistance before and after equivalence, r2And r2_eqBefore respectively indicating equivalence
Generator amature resistance afterwards, i.e. S, xm、x1、x2Respectively separate unit generator capacity, excitation reactance, stator reactance and rotor
Reactance, Seq、xm_eq、x1_eq、x2_eqRespectively equivalent capacity, equivalent excitation reactance, equivalent stator reactance and equivalent rotor reactance.
As it can be seen that generator capacity is original m times after equivalence, the resistance reactance parameter of generator is original 1/m after equivalence,
Transformer equivalent parameters:
Wherein, STAnd ST_eqRespectively indicate the transformer capacity before and after equivalence, ZTAnd ZT_eqRespectively indicate the change before and after equivalence
Depressor impedance.As it can be seen that the equivalence of similar generator parameter, the capacity of transformer is original m times after equivalence, the resistance of transformer
Resisting is original 1/m after equivalence.
Wind speed equivalence parameter:
In order to enable equivalent wind speed can represent group's wind speed, in calculation of wind speed equivalent parameters, first root to the full extent
According at every Wind turbines wind speed and wind speed-power curve determine the power of every Wind turbines, calculate the average value of power,
Wind speed equivalence parameter is determined further according to average value, wind speed-power curve.
Control equivalent parameters:
In addition to the reference capacity of power test part is changed to original m times i.e. S in control parametereqExcept=mS, other ginsengs
Number is constant, i.e., identical as the control parameter before equivalence.
S6 establishes marine wind electric field Equivalent Model according to each wind turbine group and its equivalent parameters.
Wherein, marine wind electric field Equivalent Model refers to and is guaranteeing the wind power plant condition constant to research system dynamic effects
Under, the model that is obtained after simplifying to wind power plant.
Specifically, as shown in figure 4, the wake effect model-Jensen mould for being suitble to extensive offshore wind farm selected first
Type, obtain offshore wind farm field parameters, then the model is analyzed, obtain wake effect coverage and can be to its shadow
The influence degree rung in range is classified, and obtains the wake effect impact factor of every unit.Then according to wake effect because
Son carries out a point group to wind power plant using improved k mean algorithm, establishes wind-powered electricity generation using capacity weighting method according to grouping result later
Field Equivalent Model.
Above-mentioned Equivalent Model can not only embody the otherness of each operating states of the units in marine wind electric field as a result, and in mould
Type precision, committed memory and calculating time aspect are all improved, and are applicable to the research of extensive offshore wind farm.
Embodiment 2
Fig. 5 is the structural frames of the valve systems such as the marine wind electric field according to an embodiment of the present invention based on the wake effect factor
Figure.
As shown in figure 5, including: acquisition module 11 based on the valve systems such as the marine wind electric field of the wake effect factor 10, determining
Module 12, grouping module 13, computing module 14 and modeling module 15.
Wherein, module 11 is obtained for obtaining offshore wind farm field parameters, wherein offshore wind farm field parameters include offshore wind farm
Arrives stream wind speed, in marine wind electric field every Wind turbines location information, wind wheel radius, attenuation constant and thrust coefficient；
Determining module 12 is used to determine the wake effect factor of every Wind turbines according to offshore wind farm field parameters；Grouping module 13 is used for
A point group is carried out according to the Wind turbines in wake effect factor pair offshore wind farm；Computing module 14 is for calculating separately each wind-powered electricity generation
The equivalent parameters of machine group；Modeling module 15 is used to establish marine wind electric field etc. according to each wind turbine group and its equivalent parameters
It is worth model.
It should be noted that aforementioned to the marine wind electric field equivalence method specific embodiment based on the wake effect factor
Description is equally applicable to the specific embodiment party of the valve systems such as the marine wind electric field based on the wake effect factor of the embodiment of the present invention
Formula, details are not described herein again.
The valve systems such as the marine wind electric field based on the wake effect factor of the embodiment of the present invention, using the wake effect factor as machine
Component group principle carries out a point group to Wind turbines, and then calculates the equivalent parameters of each machine group, and according to grouping result and wait
Value parameter establishes the marine wind electric field Equivalent Model based on the wake effect factor, obtained Equivalent Model precision height, committed memory
Few, computation complexity is low, the research suitable for extensive offshore wind farm.
Embodiment 3
Fig. 6 is the mechanism frame of the marine wind electric field equivalence device according to an embodiment of the present invention based on the wake effect factor
Figure.
As shown in fig. 6, the marine wind electric field equivalence device 20 based on the wake effect factor includes memory 21, processor 22
And it is stored in the computer program 23 on memory 21.
In this embodiment, it when computer program 23 is executed by processor 22, realizes above-mentioned based on the wake effect factor
Marine wind electric field equivalence method.
The marine wind electric field equivalence device based on the wake effect factor of the embodiment of the present invention, stores on its memory
When computer program corresponding with the above-mentioned marine wind electric field equivalence method based on the wake effect factor is executed by processor, it can build
Vertical marine wind electric field Equivalent Model, the model accuracy is high, committed memory is few, and computation complexity is low, is suitable for extensive sea turn
The research of electricity.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. a kind of marine wind electric field equivalence method based on the wake effect factor, which comprises the following steps:
Obtain offshore wind farm field parameters, wherein the offshore wind farm field parameters include the arrives stream wind speed of marine wind electric field, the sea
The location information of every Wind turbines, wind wheel radius, attenuation constant and thrust coefficient in upper wind power plant；
The wake effect factor of every Wind turbines is determined according to the offshore wind farm field parameters；
A point group is carried out according to the Wind turbines in offshore wind farm described in the wake effect factor pair；
Calculate separately the equivalent parameters of each wind turbine group；
Marine wind electric field Equivalent Model is established according to each wind turbine group and its equivalent parameters.
2. the marine wind electric field equivalence method according to claim 1 based on the wake effect factor, which is characterized in that described
The wake effect factor of every Wind turbines is determined according to the offshore wind farm field parameters, comprising:
The wake effect influence degree of every Wind turbines is calculated according to the offshore wind farm field parameters；
The wake effect factor of every Wind turbines is determined according to the wake effect influence degree.
3. the marine wind electric field equivalence method according to claim 2 based on the wake effect factor, which is characterized in that pass through
Following formula calculates the wake effect influence degree of every Wind turbines:
Wherein, σiFor the wake effect influence degree of i-th Wind turbines, vinFor the arrives stream wind speed, viFor the i-th typhoon motor
Wind speed at group, i=1,2 ..., n, n are the quantity of Wind turbines in the marine wind electric field.
4. the marine wind electric field equivalence method according to claim 3 based on the wake effect factor, which is characterized in that described
The wake effect factor and the wake effect influence degree negative correlation.
5. the marine wind electric field equivalence method according to claim 3 based on the wake effect factor, which is characterized in that
When wake effect influence degree is greater than the first preset value, determine that the wake effect factor is 0；
When wake effect influence degree is greater than the second preset value and is less than or equal to first preset value, determine that wake flow is imitated
Answering the factor is 1；
When wake effect influence degree is greater than third preset value and is less than or equal to second preset value, determine that wake flow is imitated
Answering the factor is 2；
When wake effect influence degree is less than or equal to the third preset value, determine that the wake effect factor is 3.
6. the marine wind electric field equivalence method according to claim 5 based on the wake effect factor, which is characterized in that described
First preset value is 0.95, and second preset value is 0.7, and the third preset value is 0.4.
7. special based on the marine wind electric field equivalence method of the wake effect factor according to any one of claim 4-6
Sign is that the Wind turbines in the offshore wind farm according to the wake effect factor pair carry out a point group, comprising:
One is randomly choosed from the n wake effect factor and is used as the first cluster centre Y1, and calculates remaining n-1 wake flow effect
Answer the distance between the factor and Y1；
Select and Y1 apart from the maximum wake effect factor as the second cluster centre Y2, and calculate separately in addition to Y1, Y2
The distance between the n-2 wake effect factor and Y1, Y2 D1 (xj, Y1) and D2 (xj, Y2), wherein j=1,2 ..., n-2；
Min [D1 (x is successively selected from big to smallj,Y1),D2(xj, Y2)] in the wake effect factor as in next cluster
The heart, until the number of cluster centre reaches m；
A point group is carried out to n Wind turbines using k mean algorithm according to selected m cluster centre.
8. the marine wind electric field equivalence method according to claim 1 based on the wake effect factor, which is characterized in that described
Equivalent parameters include generator equivalent parameters, transformer equivalent parameters, wind speed equivalence parameter and control equivalent parameters,
Wherein, the generator equivalent parameters are as follows:
Wherein, S and SeqRespectively indicate the generator capacity before and after equivalence, xmAnd xm_eqThe generator before and after equivalence is respectively indicated to encourage
Magnetoelectricity is anti-, x1And x1_eqRespectively indicate the generator unit stator reactance before and after equivalence, x2And x2_eqRespectively indicate the power generation before and after equivalence
Machine rotor reactance, r1And r1_eqRespectively indicate the generator unit stator resistance before and after equivalence, r2And r2_eqBefore and after respectively indicating equivalence
Generator amature resistance；
The transformer equivalent parameters are as follows:
Wherein, STAnd ST_eqRespectively indicate the transformer capacity before and after equivalence, ZTAnd ZT_eqRespectively indicate the transformer before and after equivalence
Impedance；
When calculating the wind speed equivalence parameter, first wind speed and wind speed-power curve according at every Wind turbines determines every
The power of platform Wind turbines calculates the average value of the power, determines further according to the average value, the wind speed-power curve
The wind speed equivalence parameter；
S in the control equivalent parameterseq=mS, other are identical as the control parameter before equivalence.
9. valve systems such as a kind of marine wind electric fields based on the wake effect factor characterized by comprising
Module is obtained, for obtaining offshore wind farm field parameters, wherein the offshore wind farm field parameters include coming for marine wind electric field
Location information, wind wheel radius, attenuation constant and the thrust coefficient of every Wind turbines in stream wind speed, the marine wind electric field；
Determining module, for determining the wake effect factor of every Wind turbines according to the offshore wind farm field parameters；
Grouping module carries out a point group for the Wind turbines in the offshore wind farm according to the wake effect factor pair；
Computing module, for calculating separately the equivalent parameters of each wind turbine group；
Modeling module, for establishing marine wind electric field Equivalent Model according to each wind turbine group and its equivalent parameters.
10. a kind of marine wind electric field equivalence device based on the wake effect factor, including memory, processor and it is stored in institute
State the computer program on memory, which is characterized in that when the computer program is executed by the processor, realize such as right
It is required that based on the marine wind electric field equivalence method of the wake effect factor described in any one of 1-8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910198617.1A CN109802440B (en) | 2019-03-15 | 2019-03-15 | Offshore wind farm equivalence method, system and device based on wake effect factor |
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| CN201910198617.1A CN109802440B (en) | 2019-03-15 | 2019-03-15 | Offshore wind farm equivalence method, system and device based on wake effect factor |
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| Publication Number | Publication Date |
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| CN109802440A true CN109802440A (en) | 2019-05-24 |
| CN109802440B CN109802440B (en) | 2020-11-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113642195A (en) * | 2021-10-14 | 2021-11-12 | 中国电力科学研究院有限公司 | New energy field station-level modeling practical equivalence method and device |
| CN115898788A (en) * | 2022-11-28 | 2023-04-04 | 中国华能集团清洁能源技术研究院有限公司 | Wind speed early warning diffusion type control method and system for offshore wind farm |
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| US20100092291A1 (en) * | 2008-10-09 | 2010-04-15 | Scholte-Wassink Hartmut | Method for controlling a wind tubine using a wind flow model |
| CN103886179A (en) * | 2014-02-25 | 2014-06-25 | 国家电网公司 | Wind farm wind turbine combination process based on wake effect clustering |
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| US20100092291A1 (en) * | 2008-10-09 | 2010-04-15 | Scholte-Wassink Hartmut | Method for controlling a wind tubine using a wind flow model |
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| CN113642195A (en) * | 2021-10-14 | 2021-11-12 | 中国电力科学研究院有限公司 | New energy field station-level modeling practical equivalence method and device |
| CN113642195B (en) * | 2021-10-14 | 2022-02-08 | 中国电力科学研究院有限公司 | New energy field station-level modeling practical equivalence method and device |
| CN115898788A (en) * | 2022-11-28 | 2023-04-04 | 中国华能集团清洁能源技术研究院有限公司 | Wind speed early warning diffusion type control method and system for offshore wind farm |
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| CN109802440B (en) | 2020-11-06 |
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