A wind farm linkage control method and device

Abstract

The application discloses a kind of wind farm linkage control method and device, the method includes: acquisition arrangement parameter;Get incoming flow wind condition;Incoming flow wind condition includes wind speed and wind direction, simultaneously obtain the first included angle formed by the direction of front row fan and incoming flow wind direction;The power curve of front row fan is corrected, and the output of front row fan is obtained;Second included angle formed by the direction of rear row fan and incoming flow wind direction is obtained, based on the tail flow model of preset and in combination with incoming flow wind condition and arrangement parameter, the tail flow area of front row fan influence rear row fan is obtained, and the wind condition where rear row fan is based on tail flow area calculation;The output of rear row fan is calculated based on the power curve after the modification of second included angle;Again, the arrangement parameter, incoming flow wind condition, first included angle and second included angle are combined simulation, corresponding overall power generation is calculated, select the parameter combination of overall power generation highest, to realize wind farm linkage control;Its beneficial effect is: the application can realize the improvement of overall power generation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind farm production and operation and maintenance, and particularly relates to a wind farm linkage control method and device. BACKGROUND

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

[0003] In a large-scale wind power base project, the wake is one of the main factors affecting the power generation. The wake received by a single unit directly affects its power generation. The larger the unit capacity is, the greater the power generation value is in the case of the same percentage of power generation increase. In most cases, the developer hopes to reduce the wake of the entire wind farm to improve the overall power generation of the wind farm and to improve the wind power project revenue.

[0004] The current wind farm control method mainly includes: 1. The wind turbine makes the swept wind surface face the incoming flow direction by yawing; 2. The wind turbine reduces the wake by limiting the power through variable pitch. The above-mentioned methods are used to maximize the efficiency of the single unit to absorb the incoming flow wind energy. However, the influence of the upstream unit wake on the overall power generation of the wind farm is ignored, which adversely affects the total power generation and revenue of the wind farm. SUMMARY

[0005] In view of the technical defects mentioned in the background, the purpose of the embodiments of the present application is to provide a wind farm linkage control method and device, which increases the overall power generation of the wind farm in the case that the power generation of the front row of units is reduced less, so as to overcome the defects that the influence of the upstream unit wake on the overall power generation of the wind farm is ignored, which adversely affects the total power generation and revenue of the wind farm.

[0006] To achieve the above-mentioned purpose, in a first aspect, the embodiments of the present application provide a wind farm linkage control method, which comprises:

[0007] Grouping the wind turbines according to a set minimum unit, and collecting the corresponding arrangement parameters;

[0008] Obtaining the incoming flow condition corresponding to each minimum unit; the incoming flow condition includes wind speed and wind direction, and a first included angle formed by the front row of wind turbines and the incoming flow direction is obtained at the same time;

[0009] Based on the first included angle and the incoming flow condition, correcting the power curve of the front row of wind turbines to obtain the output of the front row of wind turbines;

[0010] A second included angle formed by the orientation of the rear fan and the incoming flow direction, based on a preset wake model and in combination with the incoming flow condition and the arrangement parameters, a wake area of the rear fan affected by the front fan is derived, and the wind condition in which the rear fan is located is calculated based on the wake area;

[0011] The output of the rear fan is calculated based on the wind condition in which the rear fan is located and the power curve modified based on the second included angle;

[0012] The arrangement parameters, the incoming flow condition, the first included angle and the second included angle are simulated again in combination, the overall power generation corresponding to each parameter combination is calculated, and the parameter combination with the highest overall power generation is selected as the corresponding full-field power control combination to realize the wind farm linkage control.

[0013] As a specific preferred mode of the present application, the wake area of the rear fan affected by the front fan is calculated based on the corresponding scene;

[0014] The scene includes: the front fan elliptical wake range does not intersect with the rear fan elliptical windward surface, the rear fan elliptical windward surface long axis top point does not enter the front fan elliptical wake range, the rear fan elliptical windward surface long axis top point enters the front fan elliptical wake range, and the front fan elliptical wake range intersects with the left and right sides of the rear fan elliptical windward surface.

[0015] As a specific implementation mode of the present application, the wind condition in which the rear fan is located is calculated based on the wake area, so that the reduction value of the equivalent wind speed of the rear fan is corrected as follows:

[0016]

[0017] Wherein, δV 01 is the reduction value of the equivalent wind speed, U0 is the free flow wind speed, C t is the thrust coefficient, which is a performance parameter provided by the manufacturer, D0 is the front fan impeller diameter, X 01 is the distance between the two fans, k is the wake expansion coefficient, the value range of k is 0.07-0.1, A' overlap is the intersection area of the rear fan windward surface and the front fan wake range, A'1 is the wind sweeping area of the rear fan; A'1=πR 2 cosσ; R is the impeller radius, and σ is the second included angle formed by the orientation of the rear fan and the incoming flow direction.

[0018] As a specific implementation mode of the present application, the wake range of the rear fan affected by the front fan is not circular but elliptical, and the rear wake influence area of the front fan is an elliptical cone that gradually diffuses.

[0019] As a specific implementation manner of the present application, the calculation result of the overall power generation includes: overall power generation decrease, overall power generation increase and overall power generation flat, and the parameter combination with the highest overall power generation is selected.

[0020] In a second aspect, the embodiments of the present application further provide a wind farm linkage control device, which comprises:

[0021] The acquisition module is configured to:

[0022] Group the wind turbines according to the set minimum unit, and acquire the corresponding arrangement parameters;

[0023] Obtain the incoming flow wind condition corresponding to each minimum unit, wherein the incoming flow wind condition comprises wind speed and wind direction, and a first included angle formed by the direction of the front row of wind turbines and the incoming flow wind direction is obtained;

[0024] The correction module is configured to correct the power curve of the front row of wind turbines based on the first included angle and the incoming flow wind condition, so as to obtain the output of the front row of wind turbines;

[0025] The processing module is configured to:

[0026] Obtain a second included angle formed by the direction of the rear row of wind turbines and the incoming flow wind direction, obtain the wake area of the rear row of wind turbines affected by the front row of wind turbines based on a preset wake model and in combination with the incoming flow wind condition and the arrangement parameters, and calculate the wind condition in which the rear row of wind turbines is located based on the wake area;

[0027] Calculate the output of the rear row of wind turbines based on the wind condition in which the rear row of wind turbines is located and the power curve modified based on the second included angle;

[0028] The arrangement parameters, the incoming flow wind condition, the first included angle and the second included angle are combined and simulated, the overall power generation corresponding to each parameter combination is calculated, and the parameter combination with the highest overall power generation is selected as the corresponding full-field power control combination, so as to realize linkage control of the wind farm.

[0029] The technical scheme provided by the embodiments of the present application first groups the wind turbines according to the set minimum unit, and reduces the equivalent area of the windward surface by modifying the power curve based on the first included angle formed by the direction of the front row of wind turbines and the incoming flow wind direction, so as to limit the power generation; meanwhile, it determines that the wake range of the rear row of wind turbines affected by the front row of wind turbines is not a circle but an ellipse with a smaller area, and the wake influence range of the rear row of wind turbines on the front row of wind turbines is smaller under specific wind conditions, so the power generation of the rear row of wind turbines will increase, and the power generation of the front row of wind turbines and the rear row of wind turbines will be balanced, which may result in overall power generation increase; and after considering the wake effect of the wake superposition, the full-field power control combination corresponding to the highest total power generation of the full field is found, so as to realize linkage control of the wind farm.

[0030] The wind farm linkage control method provided by the application can improve the power generation capacity in the same wind farm, solve the contradiction between the limited wind farm area, resources and the overall benefits of project development in the prior art, greatly improve the boundary conditions of the wind power project and the development of the wind power industry, overcome the defects of ignoring the influence of the wake of the upstream unit on the total power generation capacity of the wind farm, and cause adverse effects on the total power generation capacity and benefits of the wind farm. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the specific embodiments of the application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced as follows.

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

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

[0034] Figure 3 is a schematic diagram of different incoming wind directions and relative positions of wind turbines provided by an embodiment of the application;

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

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

[0037] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are some of the embodiments of the application, but not all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

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

[0039] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the invention. Therefore, the phrases "in an embodiment," "in an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination.

[0040] It should be noted that, unless otherwise stated, the technical terms used in this embodiment have the common meaning as understood in the relevant technical field.

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

[0042] S101, group the fans according to the set minimum unit and collect the corresponding layout parameters;

[0043] S102, obtain the incoming airflow conditions corresponding to each smallest unit; the incoming airflow conditions include wind speed and wind direction, and at the same time obtain the first angle formed by the orientation of the front fan and the incoming airflow direction;

[0044] S103, Based on the first included angle and the incoming airflow conditions, the power curve of the front fan is corrected to obtain the output of the front fan;

[0045] S104, obtain the second angle formed by the orientation of the rear exhaust fan and the direction of the incoming airflow, based on the preset wake model and combined with the incoming airflow conditions and the arrangement parameters, determine the wake region of the front exhaust fan affecting the rear exhaust fan, and calculate the airflow conditions of the rear exhaust fan based on the wake region.

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

[0047] S106, then perform a combined simulation of the arrangement parameters, incoming wind conditions, first included angle and second included angle, calculate the overall power generation corresponding to each parameter combination, and select the parameter combination with the highest overall power generation as the corresponding whole-field power control combination to realize the wind farm linkage control.

[0048] In this embodiment, refer to Figure 2The minimum unit is composed of two wind turbines, but is not limited to this; the arrangement parameters include impeller diameters D0, D1 of the two wind turbines, hub heights H0, H1, an interval X01 between the two wind turbines, and an azimuth angle of the two wind turbines; the azimuth angle is considered in the wind condition (wind direction) and is not considered in the arrangement parameters; for simplifying the analysis, the minimum unit model only considers the case that the hub heights of the two wind turbines are consistent, i.e., H0=H1, and only considers the case that the impeller diameters of the two wind turbines are consistent, i.e., D0=D1, and the radii are R.

[0049] The wind condition of the incoming flow is collected, and for each minimum unit, the wind condition data experienced by the minimum unit need to be considered, mainly the wind speed and the wind direction; the first included angle is shown in the attached drawings and subsequent texts, and is denoted by θ; the second included angle is shown in the attached drawings and subsequent texts, and is denoted by σ; in the subsequent combined simulation iteration, the included angle θ and the included angle σ take values in [0, 45°] and [0, 45°] respectively. Figure 3 The second included angle is shown in the attached drawings and subsequent texts, and is denoted by σ; in the subsequent combined simulation iteration, the included angle θ and the included angle σ take values in [0, 45°] and [0, 45°] respectively.

[0050] To realize the linkage control of the wind turbines, the output of the wind turbines needs to be limited, which can be understood as the corresponding power generation; in S103, based on the included angle θ between the orientation of the front wind turbine and the incoming flow direction, the output of the front wind turbine is expressed by modifying the corresponding original power of the wind turbine, and for each included angle θ of the control wind turbine output, there is a modified power curve corresponding to it; due to the linkage control of the wind turbines, the output of the wind turbines is limited, the front wind turbine has an included angle θ with the incoming flow direction, the wind energy obtained from the flow is reduced, and the power generation of the front wind turbine will decrease, the windward surface of the front wind turbine becomes cosθ times of the original, and the reduction ratio of the power generation of the front wind turbine caused by limiting the output of the front wind turbine in different wind speed sections 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 wind turbine, the theoretical power generation can be calculated from the incoming flow condition and the modified power curve, and the equivalent area of the front wind turbine is reduced, so the downstream wake area will be reduced.

[0052] Due to the sweeping range of the impellers of the front and rear wind turbines, the wake range of the front wind turbine affecting the rear wind turbine is not circular but elliptical, and the rear wake influence area of the front wind turbine is an elliptical cone that gradually diffuses; therefore, the rear wake influence area of the front wind turbine is not limited to the central axis of the line connecting the centers of the two wind turbines, but when the incoming wind direction and the central axis form an included angle α, and the rear wind turbine impeller surface is within the rear wake influence range of the front wind turbine, the influence of the front and rear wind turbines needs to be considered.

[0053] Since the rear fan has an angle σ with the incoming flow, the wind energy obtained from the flow is reduced, and the power generation capacity will be reduced. The windward surface of the rear fan becomes cosσ times of the original. The output of the rear fan is expressed by modifying the corresponding original power of the fan. For each angle σ of the control fan output, there is a modified power curve. The reduction of the power generation capacity of the rear fan caused by limiting the output of the rear fan is the same in different wind speed sections, 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 uses the Modified Park model. Since the front fan has an angle θ with the incoming flow, and the rear fan has an angle σ with the incoming flow, the wake range of the front fan affecting the rear fan is not circular but elliptical. Therefore, the intersection area of the windward surface of the rear fan and the wake range of the front fan (i.e. the wake area) needs to be modified in the formula of the Modified Park model. Referring to Figure 4 , the intersection area A of the windward surface of the rear fan and the wake range of the front fan is modified by establishing the relationship between the actual elliptical wake range of the front fan and the elliptical windward surface of the rear fan and the intersection area of the conventional circular wake range of the front fan and the circular windward surface of the rear fan. overlap , and the modified is denoted as A' overlap ; thereby the reduction of the equivalent wind speed of the rear fan is modified, and the corresponding wind condition is obtained as:

[0055]

[0056] wherein δV 01 is the reduction of the equivalent wind speed, U0 is the free flow 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 fans, 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 fan and the wake range of the front fan, A'1 is the swept area of the rear fan; A'1=πR 2 cosσ; R is the impeller radius, and σ is the second angle formed by the orientation of the rear fan and the incoming flow.

[0057] A' overlap changes with the impeller radius R, the distance X 01 between the two fans, the inclination angle β of the two sides of the conical wake area, the angle α between the incoming wind direction and the line connecting the two fans, the angle θ between the orientation of the front fan and the incoming flow, and the angle σ between the orientation of the rear fan and the incoming flow.

[0058] In the embodiment, the influence of the front fan on the wake area of the rear fan is corrected based on corresponding scenarios;

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

[0060] Specifically, let R weak be the distance from the front fan X 01 to the elliptical wake area long axis:

[0061] R weak = (R+X 01 cosαsinβ)

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

[0063] 0≤X 01 sinα<R weak +R

[0064] R weak cosθ+R cosσ≥X 01 sinα

[0065] Result:

[0066] A′ overlap =0

[0067] Scenario 2, condition: the rear fan elliptical windward surface long axis vertex does not enter the front fan elliptical wake range.

[0068] 0≤X 01 sinα<R weak +R

[0069] R weak cosθ+Rcosσ<X 01 sinα

[0070]

[0071] Result:

[0072]

[0073] Wherein, m = R cos σ is the half short axis of the oval windward surface of the rear fan, n = R is the half long axis of the oval windward surface of the rear fan, i.e. the radius of the fan impeller, a = R weak cos θ is the half short axis of the oval wake area at the front fan X 01, b = R weak is the half long axis of the oval wake area at the front fan X 01, t1 and t2 are intermediate parameters of the simplified formula, refer to the subsequent description.

[0074] Case 3, condition: the vertex of the long axis of the oval windward surface of the rear fan enters the oval wake area of the front fan.

[0075] 0 ≤ X 01 sin α < R weak + R

[0076]

[0077] R weak cos θ - X 01 sin α < R cos σ

[0078] Result:

[0079]

[0080] Wherein, t3 is an intermediate parameter of the simplified formula, refer to the subsequent description.

[0081] Case 4, condition: the oval wake area of the front fan intersects with the oval windward surface of the rear fan on both left and right sides.

[0082] 0 ≤ X 01 sin α < R weak + R

[0083]

[0084] R weak cos θ - X 01 sin α > R cos σ

[0085] Result:

[0086]

[0087] For the sake of simplifying the expression, the following algebraic expressions are introduced, wherein:

[0088]

[0089] a = R weak cos θ, b = R weak , m = R cos σ, n = R.

[0090] The intersection area of the windward surface of the rear exhaust fan and the wake range of the front exhaust fan is calculated after the scene calculation, and the theoretical power generation of the rear exhaust fan is calculated by the calculated wind condition of the rear exhaust fan and the modified power curve.

[0091] Finally, the combined simulation is performed, that is, the overall power generation corresponding to each parameter combination is calculated, and the theoretical net power generation of the minimum unit is obtained by summing the theoretical power generation of the front and rear exhaust fans; the power generation of the front and rear exhaust fans may produce three calculation results: the overall power generation decreases, the overall power generation increases, and the overall power generation is flat, and the case with the highest overall power generation is selected as the control means.

[0092] For a given full-field model and arrangement parameter combination, the full-field power control combination corresponding to the highest total power generation is found under each wind condition considering the wake effect of the wake superposition, the optimization variable is the full-field power control combination, and the optimization target is the total power generation of the full-field; the method for calculating the full-field fan cooperative control combination corresponding to the global highest power generation is used to realize the linkage control of the wind farm.

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

[0094] Through the linkage control of the wind farm, the power generation of the same wind farm can be improved, the contradiction between the limited wind farm area, resources and the overall benefit demand of the project development in the prior art is solved, and the boundary conditions of the wind power project and the development of the wind power industry are greatly improved; the defects that the influence of the wake of the upstream unit on the overall power generation of the wind farm is ignored, and the total power generation and the benefit of the wind farm are adversely affected are overcome.

[0095] Reference Figure 5 Based on the same inventive concept, the embodiment of the present application also provides a wind farm linkage control device, which comprises:

[0096] The acquisition module is configured to:

[0097] Group the wind fans according to the set minimum unit, and acquire the corresponding arrangement parameters;

[0098] obtaining a flow wind condition corresponding to each minimum unit, wherein the flow wind condition comprises a wind speed and a wind direction, and obtaining a first included angle formed by a direction of the front row of wind machines and the flow wind direction;

[0099] a correction module, configured to correct a power curve of the front row of wind machines based on the first included angle and the flow wind condition, to obtain an output of the front row of wind machines;

[0100] a processing module, configured to:

[0101] obtaining a second included angle formed by a direction of the rear row of wind machines and the flow wind direction, and obtaining a wake area of the front row of wind machines affecting the rear row of wind machines based on a preset wake model and in combination with the flow wind condition and the arrangement parameter, and calculating a wind condition of the rear row of wind machines based on the wake area;

[0102] calculating an output of the rear row of wind machines based on the wind condition of the rear row of wind machines and the power curve modified based on the second included angle;

[0103] combining the arrangement parameter, the flow wind condition, the first included angle and the second included angle for simulation again, calculating an overall power generation corresponding to each parameter combination, and selecting a parameter combination with the highest overall power generation as a corresponding full-field power control combination, to realize the wind farm linkage control.

[0104] Further, the wake area of the front row of wind machines affecting the rear row of wind machines is calculated based on a corresponding scenario.

[0105] The scenario includes: the front row of wind machines elliptical wake range does not intersect with the rear row of wind machines elliptical windward surface, the rear row of wind machines elliptical windward surface long axis top point does not enter the front row of wind machines elliptical wake range, the rear row of wind machines elliptical windward surface long axis top point enters the front row of wind machines elliptical wake range, and the front row of wind machines elliptical wake range intersects with the left and right sides of the rear row of wind machines elliptical windward surface.

[0106] Further, the wind condition of the rear row of wind machines calculated based on the wake area is that a reduction value of an equivalent wind speed of the rear row of wind machines is:

[0107]

[0108] wherein, δV 01 is the reduction value of the equivalent wind speed, U0 is a free flow wind speed, C t is a thrust coefficient, which is a performance parameter provided by a manufacturer, D0 is a front row of wind machines impeller diameter, X 01 is a distance between the two wind machines, k is a wake expansion coefficient, the value range of k is 0.07-0.1, A’ overlap is an intersection area of the rear row of wind machines windward surface and the front row of wind machines wake range, A’1 is a wind sweeping area of the rear row of wind machines; A’1=πR 2cosσ; R is the impeller radius, and σ is a second included angle formed by the rear fan orientation and the incoming flow direction.

[0109] It should be noted that the more specific workflow of the device embodiment is described in the foregoing method embodiment, which will not be described here.

[0110] The whole scheme of the wind farm linkage control can realize the power generation capacity improvement in the same wind farm, solve the contradiction between the limited wind farm area, resources and the overall benefits of project development in the prior art, bring great improvement to the boundary conditions of the wind power project and the development of the wind power industry; overcome the defects that the influence of the upstream unit wake on the whole power generation capacity is ignored, and the total power generation capacity and the benefits of the wind farm are adversely affected.

[0111] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A wind farm coordinated control method, characterized in that, The method comprises: grouping the wind turbines according to a preset minimum unit and collecting corresponding arrangement parameters; obtaining a flow wind condition corresponding to each minimum unit; the flow wind condition comprises a wind speed and a wind direction, and a first included angle formed by a direction of the front row of wind turbines and a direction of the flow wind is obtained; correcting a power curve of the front row of wind turbines based on the first included angle and the flow wind condition to obtain an output of the front row of wind turbines; obtaining a second included angle formed by a direction of the rear row of wind turbines and the direction of the flow wind, obtaining a wake area of the rear row of wind turbines influenced by the front row of wind turbines based on a preset wake model and in combination with the flow wind condition and the arrangement parameters, and calculating a wind condition in which the rear row of wind turbines is located based on the wake area; calculating an output of the rear row of wind turbines based on the wind condition in which the rear row of wind turbines is located and a power curve modified based on the second included angle; combining and simulating the arrangement parameters, the flow wind condition, the first included angle and the second included angle to calculate an overall power generation corresponding to each parameter combination, and selecting a parameter combination with the highest overall power generation as a corresponding full-field power control combination to realize a wind farm linkage control.

2. A wind farm coordinated control method according to claim 1, characterized in that, The wake area of the rear row of wind turbines influenced by the front row of wind turbines is corrected and calculated based on a corresponding scenario; the scenario comprises: the front row of wind turbines does not intersect with an elliptical windward surface of the rear row of wind turbines, a long-axis top point of the elliptical windward surface of the rear row of wind turbines does not enter an elliptical wake range of the front row of wind turbines, the long-axis top point of the elliptical windward surface of the rear row of wind turbines enters the elliptical wake range of the front row of wind turbines, and the elliptical wake range of the front row of wind turbines intersects with the left and right sides of the elliptical windward surface of the rear row of wind turbines.

3. A wind farm coordinated control method according to claim 2, characterized in that, The wind condition in which the rear row of wind turbines is located is calculated based on the wake area, so that a reduction value of an equivalent wind speed of the rear row of wind turbines is corrected as follows: wherein δV 01 is the reduction of the 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 fans, k is the wake expansion coefficient, which has a value in the range of 0.07 to 0.1, A’ overlap is the intersection area of the windward surface of the rear fan and the wake range of the front fan, A’1 is the swept area of the rear fan; A’1 = πR 2 cosσ; R is the impeller radius, and σ is the second included angle formed by the direction of the rear fan and the incoming flow direction.

4. A wind farm coordinated control method according to claim 3, characterized in that, The wake range of the rear row of wind turbines influenced by the front row of wind turbines is not circular but elliptical, and a rear wake influence area of the front row of wind turbines is in the shape of an elliptical cone gradually expanding.

5. A wind farm coordinated control method according to claim 3, characterized in that, The calculation result of the overall power generation comprises: 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.

6. A wind farm coordinated control device, characterized by, The device comprises: a collection module configured to: group the wind turbines according to a preset minimum unit and collect corresponding arrangement parameters; obtain a flow wind condition corresponding to each minimum unit; the flow wind condition comprises a wind speed and a wind direction, and a first included angle formed by a direction of the front row of wind turbines and a direction of the flow wind is obtained; a correction module configured to correct a power curve of the front row of wind turbines based on the first included angle and the flow wind condition to obtain an output of the front row of wind turbines; a processing module configured to: obtain a second included angle formed by a direction of the rear row of wind turbines and the direction of the flow wind, obtain a wake area of the rear row of wind turbines influenced by the front row of wind turbines based on a preset wake model and in combination with the flow wind condition and the arrangement parameters, and calculate a wind condition in which the rear row of wind turbines is located based on the wake area; calculate an output of the rear row of wind turbines based on the wind condition in which the rear row of wind turbines is located and a power curve modified based on the second included angle. The arrangement parameters, the incoming flow wind condition, the first included angle and the second included angle are combined for simulation, the overall power generation corresponding to each parameter combination is calculated, and the parameter combination with the highest overall power generation is selected as the corresponding full-field power control combination to realize the wind farm linkage control.

7. A wind farm coordinated control device according to claim 6, c h a r a c t e r i z e d i n that The tail flow area of the rear row of wind turbines affected by the front row of wind turbines is calculated based on the corresponding scene; The scene includes: the front row of wind turbines elliptical tail flow range does not intersect with the rear row of wind turbines elliptical windward surface, the rear row of wind turbines elliptical windward surface long axis top point does not enter the front row of wind turbines elliptical tail flow range, the rear row of wind turbines elliptical windward surface long axis top point enters the front row of wind turbines elliptical tail flow range, and the front row of wind turbines elliptical tail flow range intersects with the left and right sides of the rear row of wind turbines elliptical windward surface.

8. A wind farm coordinated control device according to claim 7, characterized in that The wind condition of the rear row of wind turbines is calculated based on the tail flow area, so that the reduction value of the equivalent wind speed of the incoming flow of the rear row of wind turbines is corrected as: wherein δV 01 is the reduction of the 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 fans, k is the wake expansion coefficient, which has a value in the range of 0.07 to 0.1, A’ overlap is the intersection area of the windward surface of the rear fan and the wake range of the front fan, A’1 is the swept area of the rear fan; A’1 = πR 2 cosσ; R is the impeller radius, and σ is the second included angle formed by the direction of the rear fan and the incoming flow direction.

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