Wind power plant linkage control method and device

Abstract

The invention discloses a wind power plant linkage control method and device. The method comprises the steps that arrangement parameters are collected; acquiring an incoming wind condition; the incoming flow wind condition comprises the wind speed and the wind direction, and meanwhile a first included angle formed by the direction of the front-row fan and the incoming flow wind direction is obtained; correcting the power curve of the front-row fan to obtain the output of the front-row fan; a second included angle formed by the orientation of the rear exhaust fan and the incoming flow wind direction is obtained, a wake flow area, affecting the rear exhaust fan, of the front exhaust fan is obtained on the basis of a preset wake flow model in combination with the incoming flow wind condition and the arrangement parameters, and the wind condition of the rear exhaust fan is calculated on the basis of the wake flow area; calculating the output of the rear exhaust fan based on the modified power curve of the second included angle; performing combined simulation on the arrangement parameters, the incoming flow wind condition, the first included angle and the second included angle, calculating the corresponding overall generating capacity, and selecting a parameter combination with the highest overall generating capacity to realize linkage control of the wind power plant; the method has the beneficial effect that the power generation capacity of the whole field can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind farm production and operation, and in particular to a wind farm linkage control method and device. Background Art

[0002] In recent years, the wind power industry is accelerating into the era of large-scale development. The unit capacity and impeller diameter of the unit are increasing, the available land for wind power projects is decreasing, and the contradiction between the limited wind farm area and the overall revenue demand of the project is becoming increasingly prominent, which has brought great difficulties to the wind power base project.

[0003] In large-scale wind power base projects, wake is one of the main factors affecting power generation. The wake to which a single unit is subjected will directly affect its power generation. The larger the capacity of a single unit, the greater the increase in power generation when the power generation of a single unit increases by the same percentage. In most cases, developers hope to reduce the wake of the entire wind farm, thereby increasing the power generation of the entire farm and improving the returns of wind power projects.

[0004] At present, the main methods of controlling wind farms are: 1. The wind turbine yaws to make the swept surface face the incoming wind direction; 2. The wind turbine reduces the wake by variable pitch and power limiting method; the above methods are used to ensure that the efficiency of a single unit in absorbing incoming wind energy is maximized; however, the impact of the wake of the upstream unit on the power generation of the entire field is ignored, which in turn has an adverse impact on the total power generation and revenue of the wind farm. Summary of the invention

[0005] In view of the technical defects mentioned in the background technology, the purpose of the embodiments of the present invention is to provide a wind farm linkage control method and device, which can improve the power generation of the entire field by reducing the power generation of the front-row units slightly, so as to overcome the current defect of ignoring the impact of the wake of the upstream units on the power generation of the entire field, which has an adverse impact on the total power generation and revenue of the wind farm.

[0006] To achieve the above objectives, in a first aspect, an embodiment of the present invention provides a wind farm linkage control method, the method comprising:

[0007] Group the fans into the set minimum units and collect the corresponding layout parameters;

[0008] Obtain the incoming wind condition corresponding to each minimum unit; the incoming wind condition includes wind speed and wind direction, and at the same time obtain the first angle formed by the direction of the front exhaust fan and the incoming wind direction;

[0009] Based on the first angle and the incoming wind condition, the power curve of the front-row fan is corrected to obtain the output of the front-row fan;

[0010] Obtaining a second angle formed by the direction of the rear exhaust fan and the incoming wind direction, obtaining a wake area where the front exhaust fan affects the rear exhaust fan based on a preset wake model and in combination with the incoming wind conditions and the arrangement parameters, and calculating the wind conditions of the rear exhaust fan based on the wake area;

[0011] Calculating the output of the rear exhaust fan based on the wind condition of the rear exhaust fan and the power curve modified based on the second angle;

[0012] Then, the layout parameters, incoming wind conditions, the first angle and the second angle are combined and simulated to calculate the overall power generation corresponding to each parameter combination, and the parameter combination with the highest overall power generation is selected as the corresponding full-field power control combination to realize the coordinated control of the wind farm.

[0013] As a specific preferred embodiment of the present application, the wake area of ​​the front exhaust fan affecting the rear exhaust fan is corrected and calculated based on the corresponding scenario;

[0014] The scenarios include: the elliptical wake range of the front fan does not intersect with the elliptical windward surface of the rear fan, the long axis vertex of the elliptical windward surface of the rear fan does not enter the elliptical wake range of the front fan, the long axis vertex of the elliptical windward surface of the rear fan enters the elliptical wake range of the front fan, and the elliptical wake range of the front fan intersects with both left and right sides of the elliptical windward surface of the rear fan.

[0015] As a specific implementation of the present application, the wind condition of the rear exhaust fan is calculated based on the wake area, so as to correct the reduction value of the equivalent wind speed of the rear exhaust fan inlet flow:

[0016]

[0017] Among them, δV 01 is the reduction value of equivalent wind speed, U 0 is the free stream wind speed, C t is the thrust coefficient, which is a performance parameter provided by the manufacturer, D 0 is the diameter of the front fan impeller, X 01 is the distance between the two wind turbines, k is the wake expansion coefficient, the value range of k is 0.07~0.1, A' overlap A' is the intersection area of ​​the windward surface of the rear exhaust fan and the wake range of the front exhaust fan, 1 is the swept area of ​​the rear exhaust fan; A' 1 =πR 2 cosσ; R is the impeller radius, σ is the second angle formed by the direction of the rear exhaust fan and the incoming wind direction.

[0018] As a specific implementation of the present application, the wake range of the front exhaust fan affecting the rear exhaust fan is not circular but elliptical, and the wake influence area behind the front exhaust fan is in the shape of a gradually diffusing elliptical cone.

[0019] As a specific implementation method of the present application, the calculation results of the overall power generation include: an overall decrease in power generation, an overall increase in power generation and an overall flat power generation, and the parameter combination with the highest overall power generation is selected.

[0020] In a second aspect, an embodiment of the present invention further provides a wind farm linkage control device, the device comprising:

[0021] Acquisition module, used for:

[0022] Group the fans into the set minimum units and collect the corresponding layout parameters;

[0023] Obtain the incoming wind condition corresponding to each minimum unit; the incoming wind condition includes wind speed and wind direction, and at the same time obtain the first angle formed by the direction of the front exhaust fan and the incoming wind direction;

[0024] A correction module, configured to correct the power curve of the front-row fan based on the first angle and the incoming wind condition to obtain the output of the front-row fan;

[0025] Processing modules for:

[0026] Obtaining a second angle formed by the direction of the rear exhaust fan and the incoming wind direction, obtaining a wake area where the front exhaust fan affects the rear exhaust fan based on a preset wake model and in combination with the incoming wind conditions and the arrangement parameters, and calculating the wind conditions of the rear exhaust fan based on the wake area;

[0027] Calculating the output of the rear exhaust fan based on the wind condition of the rear exhaust fan and the power curve modified based on the second angle;

[0028] Then, the layout parameters, incoming wind conditions, the first angle and the second angle are combined and simulated to calculate the overall power generation corresponding to each parameter combination, and the parameter combination with the highest overall power generation is selected as the corresponding full-field power control combination to realize the coordinated control of the wind farm.

[0029] The technical solution provided by the embodiment of the present invention is to group the wind turbines according to the set minimum unit first, and based on the first angle formed by the direction of the front-row wind turbines and the incoming wind direction, reduce the equivalent area of ​​the windward surface, and limit the power by modifying the power curve; at the same time, it determines that the wake range of the front-row wind turbines affecting the rear-row wind turbines is not a circle but an ellipse with a smaller area, and the wake influence range of the rear-row wind turbines will be smaller under certain wind conditions, so the power generation of the rear-row wind turbines will increase, and the power generation of the front and rear wind turbines may increase as a whole; and after considering the wake effect of the wake superposition, find the whole-field power control combination corresponding to the highest total power generation in the whole field to realize the wind farm linkage control;

[0030] Through the linkage control of wind farms in the present invention, the power generation can be increased in the same wind farm, which solves the contradiction between the limited wind farm area and resources in the prior art and the demand for the overall benefits of project development, and brings great improvements to the boundary conditions of wind power projects and the development of the wind power industry; it overcomes the current defect of ignoring the impact of the wake of the upstream unit on the power generation of the entire field, which has an adverse impact on the total power generation and benefits of the wind farm. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation of the present invention or the technical solution in the prior art, the drawings required for use in the specific implementation or the description of the prior art are briefly introduced below.

[0032] Figure 1 is a flow chart of a wind farm linkage control method provided by an embodiment of the present invention;

[0033] Figure 2 It is a schematic diagram of grouping of a minimum unit provided by an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of different incoming wind directions and relative positions of fans provided by an embodiment of the present invention;

[0035] Figure 4 It is a schematic diagram of minimum unit wake calculation provided by an embodiment of the present invention;

[0036] Figure 5 It is a principle block diagram of a wind farm linkage control device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0039] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "in one embodiment," "in an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. Furthermore, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any appropriate combinations and / or subcombinations.

[0040] It should be noted that, unless otherwise specified, the technical terms in this embodiment have the common meanings understood in the relevant technical field.

[0041] Please refer to Figure 1 and Figure 4 , an embodiment of the present invention provides a wind farm linkage control method, the method comprising:

[0042] S101, grouping the fans according to the set minimum units and collecting the corresponding layout parameters;

[0043] S102, obtaining the incoming wind condition corresponding to each minimum unit; the incoming wind condition includes wind speed and wind direction, and obtaining a first angle formed by the direction of the front row fan and the incoming wind direction;

[0044] S103, based on the first angle and the incoming wind condition, correcting the power curve of the front-row fan to obtain the output of the front-row fan;

[0045] S104, obtaining a second angle formed by the direction of the rear exhaust fan and the incoming wind direction, and obtaining a wake area where the front exhaust fan affects the rear exhaust fan based on a preset wake model and in combination with the incoming wind conditions and the arrangement parameters, and calculating the wind conditions of the rear exhaust fan based on the wake area;

[0046] S105, calculating the output of the rear exhaust fan based on the wind condition of the rear exhaust fan and the power curve modified based on the second angle;

[0047] S106, performing a combined simulation on the arrangement parameters, incoming wind conditions, the first angle and the second angle, calculating the overall power generation corresponding to each parameter combination, and selecting the parameter combination with the highest overall power generation as the corresponding full-field power control combination to achieve coordinated control of the wind farm.

[0048] In this embodiment, refer to Figure 2, taking the minimum unit composed of two wind turbines as an example, but not limiting it; the layout parameters include the impeller diameters D0 and D1 of the two wind turbines, the hub heights H0 and H1, the distance X01 between the two wind turbines, and the azimuth of the arrangement of the two wind turbines; among them, the azimuth will be considered in the wind condition (wind direction) and will not be considered in the layout parameters; to simplify the analysis, the minimum unit model only considers the case where the hub heights of the two wind turbines are consistent, that is, H0=H1, and the minimum unit model only considers the case where the impeller diameters of the two wind turbines are consistent, that is, D0=D1, and the radius is R.

[0049] To collect the incoming wind conditions, for each minimum unit, the wind condition data it has experienced must be considered, mainly considering wind speed and wind direction; the first angle is Figure 3 The angle θ is represented by θ in the subsequent text, and the second angle is represented by σ in the accompanying drawings and subsequent text; in the subsequent combined simulation traversal, the angle θ and the angle σ take values ​​of [0, 45°] and [0, 45°] respectively.

[0050] To achieve wind turbine linkage control, it is necessary to limit the output of the wind turbine, and the output can be understood as the corresponding power generation; in S103, based on the angle θ between the direction of the front-row fan and the incoming wind direction, the output expression of the front-row fan is achieved by modifying the corresponding original power of the fan, and there is a corrected power curve corresponding to each angle θ for controlling the output of the fan; due to the wind turbine linkage control, the output of the fan is limited, the direction of the front-row fan has an angle θ with the incoming wind direction, the wind energy obtained from the wind flow is reduced, and its power generation will decrease, and the windward surface of the front-row fan becomes cosθ times the original size. The reduction ratio of the power generation of the front-row fan caused by limiting the output of the front-row fan in different wind speed ranges is the same, which is (1-cosθ), so the new power curve only needs to be multiplied by the coefficient cosθ.

[0051] For the front-row fans, their theoretical power generation can be calculated based on the incoming wind conditions and the modified power curve. In addition, as the equivalent area of ​​the front-row fans decreases, their downstream wake area will also be reduced.

[0052] Since the sweep of the impellers of the front and rear exhaust fans has a certain range, the wake range of the front exhaust fan affecting the rear exhaust fan is not circular but elliptical, and the wake influence area behind the front exhaust fan is a gradually spreading elliptical cone; therefore, the wake influence area of ​​the front exhaust fan is not limited to the central axis of the line connecting the centers of the two fans, but when the incoming wind direction and the central axis form a certain angle α, and the impeller surface of the rear exhaust fan is within the wake influence area of ​​the front exhaust fan, the influence of the front and rear exhaust fans must be considered.

[0053] Since the rear exhaust fan has an angle σ with the incoming wind direction, the wind energy obtained from the wind flow is reduced, and its power generation will decrease. The windward side of the rear exhaust fan becomes cosσ times the original. The output expression of the rear exhaust fan is realized by modifying the corresponding original power of the fan. For each angle σ that controls the fan output, there is a corresponding corrected power curve. The reduction ratio of the rear exhaust fan power generation caused by limiting the rear exhaust fan output in different wind speed sections is the same, which is (1-cosσ). Therefore, the new power curve only needs to be multiplied by the coefficient cosσ.

[0054] In this embodiment, the wake model adopts the Modified Park model; since the front fan direction has an angle θ with the incoming wind direction, and the rear fan direction has an angle σ with the incoming wind direction, the wake range of the front fan affecting the rear fan is not circular but elliptical; therefore, the intersection area of ​​the rear fan windward surface and the front fan wake range (i.e., the wake area) in the Modified Park model formula needs to be modified. Figure 4 Here, the intersection area A of the rear fan windward surface and the front fan wake range is corrected by establishing the relationship between the actual intersection area of ​​the front fan elliptical wake range and the rear fan elliptical windward surface and the conventional front circular wake range and the rear circular windward surface. overlap and the corrected value is recorded as A' overlap ; Thus, the reduction value of the equivalent wind speed of the exhaust fan inlet is corrected, and the corresponding wind condition is obtained as follows:

[0055]

[0056] Among them, δV 01 is the reduction value of equivalent wind speed, U 0 is the free stream wind speed, C t is the thrust coefficient, which is a performance parameter provided by the manufacturer, D 0 is the diameter of the front fan impeller, X 01 is the distance between the two wind turbines, k is the wake expansion coefficient, the value range of k is 0.07~0.1, A' overlap A' is the intersection area of ​​the windward surface of the rear exhaust fan and the wake range of the front exhaust fan, 1 is the swept area of ​​the rear exhaust fan; A' 1 =πR 2 cosσ; R is the impeller radius, σ is the second angle formed by the direction of the rear exhaust fan and the incoming wind direction.

[0057] A' overlap With the impeller radius R, the distance between the two fans X 01, the inclination angle β on both sides of the conical wake area, the angle α between the incoming wind direction and the angle between the two wind turbines, the angle θ between the direction of the front row fans and the incoming wind direction, and the angle σ between the direction of the front row fans and the incoming wind direction.

[0058] In this embodiment, the wake area of ​​the front exhaust fan affecting the rear exhaust fan is corrected and calculated based on the corresponding scenario;

[0059] The scenarios include: the elliptical wake range of the front fan does not intersect with the elliptical windward surface of the rear fan, the long axis vertex of the elliptical windward surface of the rear fan does not enter the elliptical wake range of the front fan, the long axis vertex of the elliptical windward surface of the rear fan enters the elliptical wake range of the front fan, and the elliptical wake range of the front fan intersects with both left and right sides of the elliptical windward surface of the rear fan.

[0060] Specifically, let R weak The distance from the front exhaust fan is X 01 The major axis of the elliptical wake region is:

[0061] R weak =(R+X 01 cosαsinβ)

[0062] Case 1, condition: the elliptical wake range of the front fan does not intersect with the elliptical windward surface of the rear fan.

[0063] 0≤X 01 sinα <R weak +R

[0064] R weak cosθ+R cosσ≥X 01 sinα

[0065] result:

[0066] A′ overlap =0

[0067] Case 2, condition: the apex of the major axis of the elliptical windward surface of the rear exhaust fan does not enter the elliptical wake range of the front exhaust fan.

[0068] 0≤X 01 sinα <R weak +R

[0069] R weak cosθ+Rcosσ <X 01 sinα

[0070]

[0071] result:

[0072]

[0073] Among them, m = R*cosσ is the semi-minor axis of the elliptical windward surface of the rear exhaust fan, n = R is the semi-major axis of the elliptical windward surface of the rear exhaust fan, that is, the radius of the fan impeller, a = R_weak*cosθ is the semi-minor axis of the elliptical wake area at X_01 from the front exhaust fan, b = R_weak is the semi-major axis of the elliptical wake area at X_01 from the front exhaust fan, t 1 ,t 2 To simplify the intermediate parameters of the formula, refer to the subsequent records.

[0074] Case 3, condition: the apex of the major axis of the elliptical windward surface of the rear exhaust fan enters the elliptical wake range of the front exhaust fan.

[0075] 0≤X 01 sinα <R weak +R

[0076]

[0077] R weak cosθ-X 01 sinα≤Rcoxσ

[0078] result:

[0079]

[0080] Among them, t 3 To simplify the intermediate parameters of the formula, refer to the subsequent records.

[0081] Case 4, condition: the elliptical wake range of the front exhaust fan intersects with the left and right sides of the elliptical windward surface of the rear exhaust fan.

[0082] 0≤X 01 sinα <R weak +R

[0083]

[0084] R weak cosθ-X 01 sinα>Rcoxσ

[0085] result:

[0086]

[0087] To simplify the expression, the following algebraic formula is introduced, where:

[0088]

[0089] a=R weak cosθ,b=R weak,m=R cosσ,n=R.

[0090] The intersection area of ​​the windward surface of the rear exhaust fan and the wake range of the front exhaust fan can be calculated in different scenarios, and then the theoretical power generation of the rear exhaust fan can be calculated based on the calculated wind conditions at the rear exhaust fan and the modified power curve.

[0091] Finally, a combined simulation is carried out, that is, the overall power generation corresponding to each parameter combination is calculated, and the theoretical net power generation of the smallest unit can be obtained by summing up the theoretical power generation of the front and rear exhaust fans. The increase and decrease of the power generation of the front and rear exhaust fans may produce three calculation results: an overall decrease in power generation, an overall increase in power generation, and an overall flat power generation. The case with the highest overall power generation is selected as the control method.

[0092] By considering the wake effect of wake superposition for a given combination of wind turbine models and layout parameters for each wind condition, the power control combination of the entire field corresponding to the highest total power generation of the entire field is found. The optimization variable is the power control combination of the entire field, and the optimization target is the total power generation of the entire field. The method of calculating the coordinated control combination of wind turbines in the entire field corresponding to the global highest power generation can realize the linkage control of the wind farm.

[0093] The above scheme first groups the wind turbines according to the set minimum unit, and based on the first angle formed by the direction of the front row wind turbines and the incoming wind direction, reduces the equivalent area of ​​the windward surface, and limits the power by modifying the power curve; at the same time, it determines that the wake range of the front row wind turbines affecting the rear row wind turbines is not a circle but an ellipse with a smaller area, and its wake influence range on the rear row wind turbines will be smaller under certain wind conditions, so the power generation of the rear row wind turbines will increase, and the increase and decrease of the power generation of the front and rear row wind turbines may result in an overall increase in power generation; and after considering the wake effect of the wake superposition, find the whole-field power control combination corresponding to the highest total power generation in the whole field to realize the wind farm linkage control;

[0094] Through the linkage control of wind farms in the present invention, the power generation can be increased in the same wind farm, which solves the contradiction between the limited wind farm area and resources in the prior art and the demand for the overall benefits of project development, and brings great improvements to the boundary conditions of wind power projects and the development of the wind power industry; it overcomes the current defect of ignoring the impact of the wake of the upstream unit on the power generation of the entire field, which has an adverse impact on the total power generation and benefits of the wind farm.

[0095] Reference Figure 5 Based on the same inventive concept, an embodiment of the present invention further provides a wind farm linkage control device, the device comprising:

[0096] Acquisition module, used for:

[0097] Group the fans into the set minimum units and collect the corresponding layout parameters;

[0098] Obtain the incoming wind condition corresponding to each minimum unit; the incoming wind condition includes wind speed and wind direction, and at the same time obtain the first angle formed by the direction of the front exhaust fan and the incoming wind direction;

[0099] A correction module, configured to correct the power curve of the front-row fan based on the first angle and the incoming wind condition to obtain the output of the front-row fan;

[0100] Processing modules for:

[0101] Obtaining a second angle formed by the direction of the rear exhaust fan and the incoming wind direction, obtaining a wake area where the front exhaust fan affects the rear exhaust fan based on a preset wake model and in combination with the incoming wind conditions and the arrangement parameters, and calculating the wind conditions of the rear exhaust fan based on the wake area;

[0102] Calculating the output of the rear exhaust fan based on the wind condition of the rear exhaust fan and the power curve modified based on the second angle;

[0103] Then, the layout parameters, incoming wind conditions, the first angle and the second angle are combined and simulated to calculate the overall power generation corresponding to each parameter combination, and the parameter combination with the highest overall power generation is selected as the corresponding full-field power control combination to realize the coordinated control of the wind farm.

[0104] Furthermore, the wake area of ​​the front exhaust fan affecting the rear exhaust fan is corrected and calculated based on the corresponding scenario;

[0105] The scenarios include: the elliptical wake range of the front fan does not intersect with the elliptical windward surface of the rear fan, the long axis vertex of the elliptical windward surface of the rear fan does not enter the elliptical wake range of the front fan, the long axis vertex of the elliptical windward surface of the rear fan enters the elliptical wake range of the front fan, and the elliptical wake range of the front fan intersects with both left and right sides of the elliptical windward surface of the rear fan.

[0106] Furthermore, the wind condition of the rear exhaust fan is calculated based on the wake area, so as to correct the reduction value of the equivalent wind speed of the rear exhaust fan inlet flow:

[0107]

[0108] Among them, δV 01 is the reduction value of equivalent wind speed, U 0 is the free stream wind speed, C t is the thrust coefficient, which is a performance parameter provided by the manufacturer, D 0 is the diameter of the front fan impeller, X 01 is the distance between the two wind turbines, k is the wake expansion coefficient, the value range of k is 0.07~0.1, A' overlap A' is the intersection area of ​​the windward surface of the rear exhaust fan and the wake range of the front exhaust fan,1 is the swept area of ​​the rear exhaust fan; A' 1 =πR 2 cosσ; R is the impeller radius, σ is the second angle formed by the direction of the rear exhaust fan and the incoming wind direction.

[0109] It should be noted that for a more specific description of the workflow of the device embodiment, please refer to the aforementioned method embodiment part, which will not be repeated here.

[0110] The wind farm linkage control of the entire scheme can achieve an increase in power generation at the same wind farm, solving the contradiction between the limited wind farm area and resources in the existing technology and the demand for overall project development benefits, bringing great improvements to the boundary conditions of wind power projects and the development of the wind power industry; it overcomes the current defect of ignoring the impact of the upstream unit wake on the overall power generation, which has an adverse impact on the total power generation and benefits of the wind farm.

[0111] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A wind farm linkage control method, characterized in that: The method comprises: Group the fans into the set minimum units and collect the corresponding layout parameters; Obtain the incoming wind condition corresponding to each minimum unit; the incoming wind condition includes wind speed and wind direction, and at the same time obtain the first angle formed by the direction of the front exhaust fan and the incoming wind direction; Based on the first angle and the incoming wind condition, the power curve of the front-row fan is corrected to obtain the output of the front-row fan; Obtaining a second angle formed by the direction of the rear exhaust fan and the incoming wind direction, obtaining a wake area where the front exhaust fan affects the rear exhaust fan based on a preset wake model and in combination with the incoming wind conditions and the arrangement parameters, and calculating the wind conditions of the rear exhaust fan based on the wake area; Calculating the output of the rear exhaust fan based on the wind condition of the rear exhaust fan and the power curve modified based on the second angle; Then, the layout parameters, incoming wind conditions, the first angle and the second angle are combined and simulated to calculate the overall power generation corresponding to each parameter combination, and the parameter combination with the highest overall power generation is selected as the corresponding full-field power control combination to realize the coordinated control of the wind farm.

2. A wind farm linkage control method according to claim 1, characterized in that: The wake area of ​​the front exhaust fan affecting the rear exhaust fan is corrected and calculated based on the corresponding scenario; The scenarios include: the elliptical wake range of the front fan does not intersect with the elliptical windward surface of the rear fan, the long axis vertex of the elliptical windward surface of the rear fan does not enter the elliptical wake range of the front fan, the long axis vertex of the elliptical windward surface of the rear fan enters the elliptical wake range of the front fan, and the elliptical wake range of the front fan intersects with both left and right sides of the elliptical windward surface of the rear fan.

3. A wind farm linkage control method as claimed in claim 2, characterized in that: The wind condition of the rear exhaust fan is calculated based on the wake area, so as to correct the reduction value of the equivalent wind speed of the rear exhaust fan inlet flow: Among them, δV 01 is the reduction value of equivalent wind speed, U0 is the free stream wind speed, C t is the thrust coefficient, which is a performance parameter provided by the manufacturer, D0 is the diameter of the front fan impeller, X 01 is the distance between the two wind turbines, k is the wake expansion coefficient, the value range of k is 0.07~0.1, A' overlap is the intersection area of ​​the windward surface of the rear exhaust fan and the wake range of the front exhaust fan, A'1 is the swept area of ​​the rear exhaust fan; A'1=πR 2 cosσ; R is the impeller radius, σ is the second angle formed by the direction of the rear exhaust fan and the incoming wind direction.

4. A wind farm linkage control method as claimed in claim 3, characterized in that: The wake range of the front exhaust fan affecting the rear exhaust fan is not circular but elliptical, and the wake influence area behind the front exhaust fan is in the shape of an elliptical cone that gradually spreads.

5. A wind farm linkage control method as claimed in claim 3, characterized in that: The calculation results of the overall power generation include: an overall decrease in power generation, an overall increase in power generation and an overall flat power generation, and a parameter combination with the highest overall power generation is selected.

6. A wind farm linkage control device, characterized in that: The device comprises: Acquisition module, used for: Group the fans into the set minimum units and collect the corresponding layout parameters; Obtain the incoming wind condition corresponding to each minimum unit; the incoming wind condition includes wind speed and wind direction, and at the same time obtain the first angle formed by the direction of the front exhaust fan and the incoming wind direction; A correction module, configured to correct the power curve of the front-row fan based on the first angle and the incoming wind condition to obtain the output of the front-row fan; Processing modules for: Obtaining a second angle formed by the direction of the rear exhaust fan and the incoming wind direction, obtaining a wake area where the front exhaust fan affects the rear exhaust fan based on a preset wake model and in combination with the incoming wind conditions and the arrangement parameters, and calculating the wind conditions of the rear exhaust fan based on the wake area; Calculating the output of the rear exhaust fan based on the wind condition of the rear exhaust fan and the power curve modified based on the second angle; Then, the layout parameters, incoming wind conditions, the first angle and the second angle are combined and simulated to calculate the overall power generation corresponding to each parameter combination, and the parameter combination with the highest overall power generation is selected as the corresponding full-field power control combination to realize the coordinated control of the wind farm.

7. A wind farm linkage control device according to claim 6, characterized in that: The wake area of ​​the front exhaust fan affecting the rear exhaust fan is corrected and calculated based on the corresponding scenario; The scenarios include: the elliptical wake range of the front fan does not intersect with the elliptical windward surface of the rear fan, the long axis vertex of the elliptical windward surface of the rear fan does not enter the elliptical wake range of the front fan, the long axis vertex of the elliptical windward surface of the rear fan enters the elliptical wake range of the front fan, and the elliptical wake range of the front fan intersects with both left and right sides of the elliptical windward surface of the rear fan.

8. A wind farm linkage control device as claimed in claim 7, characterized in that: The wind condition of the rear exhaust fan is calculated based on the wake area, so as to correct the reduction value of the equivalent wind speed of the rear exhaust fan inlet flow: Among them, δV 01 is the reduction value of equivalent wind speed, U0 is the free stream wind speed, C t is the thrust coefficient, which is a performance parameter provided by the manufacturer, D0 is the diameter of the front fan impeller, X 01 is the distance between the two wind turbines, k is the wake expansion coefficient, the value range of k is 0.07~0.1, A' overlap is the intersection area of ​​the windward surface of the rear exhaust fan and the wake range of the front exhaust fan, A'1 is the swept area of ​​the rear exhaust fan; A'1=πR 2 cosσ; R is the impeller radius, σ is the second angle formed by the direction of the rear exhaust fan and the incoming wind direction.

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