A control method, device, and program product for a wind turbine generator system
By obtaining the correspondence between the operating parameters and control parameters of the wind turbine generator set and the pitch angle, the pitch angle is adjusted to solve the problem of low output power of the wind turbine generator set, thereby increasing power generation under low wind speed.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GOLDWIND PIONEER TECHNOLOGY (YANCHENG) CO LTD
- Filing Date
- 2025-12-30
- Publication Date
- 2026-07-24
AI Technical Summary
Wind turbine generators have low output power under certain operating conditions, failing to fully utilize wind energy.
By acquiring the operating parameters of the wind turbine generator set, it is determined that it is in the grid-connected speed control stage. The correspondence between the control parameters and the pitch angle is obtained, and the pitch angle is adjusted to optimize the output power.
During the grid-connected speed control phase, the pitch angle is optimized to improve the output power of the wind turbine generator and increase power generation.
Smart Images
Figure CN122447259A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of wind power technology, specifically to a control method, equipment, and program product for a wind turbine generator set. Background Technology
[0002] During operation, when the generator's output power is less than the rated power, the pitch angle remains constant at zero degrees. When the generator's output power is equal to or greater than the rated power, the pitch angle is adjusted according to the change in output power to maintain the generator's output power at the rated power. By adjusting the pitch angle, wind energy is fully utilized, and the wind turbine is protected from damage caused by excessively high wind speeds.
[0003] However, under certain operating conditions, the output power of wind turbine generators is low, and wind energy is not fully utilized. Summary of the Invention
[0004] In view of this, this application provides a control method, device and program product for wind turbine generator sets, which can improve the output power of wind turbine generator sets during the grid-connected speed control stage.
[0005] The technical solution provided in this application is as follows: In a first aspect, this application provides a control method for a wind turbine generator set, the method comprising: The operating parameters of the wind turbine generator set are obtained, including rotor speed and motor torque. If the operating parameters are determined to meet the control conditions, the control parameters are obtained. The control conditions are used to determine that the wind turbine generator set is in the grid-connected speed control stage. Obtain the first correspondence between control parameters and propeller pitch angle; Based on the control parameters and the first correspondence between the control parameters and the pitch angle, the target pitch angle data corresponding to the control parameters is determined; The wind turbine generator set is controlled based on the target pitch angle data.
[0006] Optionally, obtaining the first correspondence between the control parameters and the pitch angle includes: Obtain the second correspondence between tip speed ratio, control parameters, and pitch angle; Obtain the value of the tip speed ratio; Based on the second correspondence and the tip speed ratio, the first correspondence between the control parameters and the pitch angle is determined.
[0007] Optionally, obtaining the second correspondence between the tip speed ratio, control parameters, and pitch angle includes: Determine the third correspondence between tip speed ratio, power coefficient of wind turbine generator set, and pitch angle; Determine the fourth correspondence between the power coefficient and control parameters of the wind turbine generator set; Based on the third and fourth correspondences, a second correspondence is determined between the tip speed ratio, control parameters, and pitch angle.
[0008] Optionally, determining the second correspondence between the tip speed ratio, control parameters, and pitch angle based on the third and fourth correspondences includes: When the power coefficient of the wind turbine meets the predetermined conditions, a second correspondence between the tip speed ratio, control parameters and pitch angle is determined according to the third correspondence and the fourth correspondence.
[0009] Optionally, the predetermined condition is that the power coefficient of the wind turbine generator set is greater than or equal to the power coefficient threshold.
[0010] Optionally, obtaining the value of the tip speed ratio includes: Obtain wind speed, rotor speed of the wind turbine generator set, and rotor radius of the wind turbine generator set; The tip speed ratio is determined based on the impeller rotation speed, the wind speed, and the impeller radius.
[0011] Optionally, the first correspondence between the control parameters and the pitch angle includes multiple sub-correspondences, wherein the sub-correspondences include the correspondence between a control parameter belonging to a sub-value range and a pitch angle value.
[0012] Optionally, the control conditions are that the difference between the impeller speed and the minimum impeller speed threshold is less than or equal to the difference threshold, and the motor torque is less than the grid-connected control torque threshold.
[0013] Optionally, the first correspondence between the control parameters and the pitch angle is the first correspondence between the shaft power and the pitch angle; Alternatively, the first correspondence between the control parameters and the pitch angle is the first correspondence between the motor torque and the pitch angle; Alternatively, the first correspondence between the control parameters and the pitch angle is the first correspondence between the wind speed and the pitch angle.
[0014] Optionally, the target pitch angle data includes a first pitch angle value at the start time of the grid-connected speed control phase and a second pitch angle value at the end time of the grid-connected speed control phase. The control method further includes: Obtain the first wind speed at the start time of the grid-connected speed control phase and the second wind speed at the end time of the grid-connected speed control phase; Wherein, the first wind speed, the second wind speed, the first pitch angle value, and the second pitch angle value satisfy: The ratio between the first difference between the second pitch angle value and the first pitch angle value and the second difference between the second wind speed and the first wind speed is in the range of [-3, -0.25] or [0.25, 3].
[0015] Optionally, the first wind speed is The second wind speed is The first pitch angle value is The second pitch angle value is ,and , , ,and satisfy: , in, and The unit is m / s. and The unit is deg.
[0016] Optionally, the target pitch angle data includes a first pitch angle value at the start time of the grid-connected speed control phase and a second pitch angle value at the end time of the grid-connected speed control phase. The control method further includes: Obtain a first ratio between the wind turbine generator output power at the end time of the grid-connected speed control phase and the rated power of the wind turbine generator. Wherein, the first ratio, the first pitch angle value, and the second pitch angle value satisfy: The first difference between the second pitch angle value and the first pitch angle value, and the ratio between the first ratio, is in the range of [-50, -5] or [5, 50].
[0017] Optionally, the output power is The rated power is The first ratio is: The first pitch angle value is The second pitch angle value is ,and , and satisfy: , in, and The unit is deg. and The unit is MW.
[0018] Secondly, this application provides a control device for a wind turbine generator set, the device comprising: The first acquisition module is used to acquire the operating parameters of the wind turbine generator set, including the rotor speed and the motor torque. The second acquisition module is used to acquire control parameters when it is determined that the operating parameters meet the control conditions, wherein the control conditions are used to determine that the wind turbine generator set is in the grid-connected speed control stage. The third acquisition module is used to acquire the first correspondence between control parameters and pitch angle; The determining module is used to determine the target pitch angle data corresponding to the control parameters based on the control parameters and the first correspondence between the control parameters and the pitch angle; The control module is used to control the wind turbine generator set based on the target pitch angle data.
[0019] Optionally, obtaining the first correspondence between the control parameters and the pitch angle includes: Obtain the second correspondence between tip speed ratio, control parameters, and pitch angle; Obtain the value of the tip speed ratio; Based on the second correspondence and the value of the tip speed ratio, a first correspondence between the control parameters and the pitch angle is determined.
[0020] Optionally, obtaining the second correspondence between the tip speed ratio, control parameters, and pitch angle includes: Determine the third correspondence between tip speed ratio, power coefficient of wind turbine generator set, and pitch angle; Determine the fourth correspondence between the power coefficient and control parameters of the wind turbine generator set; Based on the third and fourth correspondences, a second correspondence is determined between the tip speed ratio, control parameters, and pitch angle.
[0021] Optionally, determining the second correspondence between the tip speed ratio, control parameters, and pitch angle based on the third and fourth correspondences includes: When the power coefficient of the wind turbine meets the predetermined conditions, a second correspondence between the tip speed ratio, control parameters and pitch angle is determined according to the third correspondence and the fourth correspondence.
[0022] Optionally, the predetermined condition is that the power coefficient of the wind turbine generator set is greater than or equal to the power coefficient threshold.
[0023] Optionally, obtaining the value of the tip speed ratio includes: Obtain wind speed, rotor speed of the wind turbine generator set, and rotor radius of the wind turbine generator set; The tip speed ratio is determined based on the impeller rotation speed, the wind speed, and the impeller radius.
[0024] Optionally, the first correspondence between the control parameters and the pitch angle includes multiple sub-correspondences, wherein the sub-correspondences include the correspondence between a control parameter belonging to a sub-value range and a pitch angle value.
[0025] Optionally, the control conditions are that the difference between the impeller speed and the minimum impeller speed threshold is less than or equal to the difference threshold, and the motor torque is less than the grid-connected control torque threshold.
[0026] Optionally, the first correspondence between the control parameters and the pitch angle is the first correspondence between the shaft power and the pitch angle; Alternatively, the first correspondence between the control parameters and the pitch angle is the first correspondence between the motor torque and the pitch angle; Alternatively, the first correspondence between the control parameters and the pitch angle is the first correspondence between the wind speed and the pitch angle.
[0027] Thirdly, this application provides an electronic device, comprising: One or more processors; Storage device, on which one or more programs are stored, When the one or more programs are executed by the one or more processors, the one or more processors implement any of the methods described in the first aspect.
[0028] Optionally, the electronic equipment is integrated into the controller of the wind turbine generator set.
[0029] Fourthly, this application provides a computer program product that, when run on a device, causes the device to perform the method described in the first aspect.
[0030] Fifthly, this application provides a wind turbine generator set, the wind turbine generator set including a controller, the controller being configured to perform the method described in the first aspect.
[0031] Therefore, this application has the following beneficial effects: This application provides a control method, device, and program product for a wind turbine generator set. In this method, operating parameters of the wind turbine generator set are acquired. These operating parameters include rotor speed and motor control torque. The operating stage of the wind turbine generator set can be determined based on these parameters. It is then determined whether the operating parameters meet control conditions. These control conditions are used to determine if the wind turbine generator set is in the grid-connected speed control stage. If the operating parameters meet the control conditions, control parameters are acquired. A first correspondence between the control parameters and the pitch angle is acquired. This first correspondence guides the adjustment of the wind turbine generator set's pitch angle. Based on the control parameters and the first correspondence between the control parameters and the pitch angle, target pitch angle data corresponding to the control parameters is determined. The determined target pitch angle data is the pitch angle data that allows the wind turbine generator set to achieve optimal output power under the current operating state. The wind turbine generator set is controlled based on the target pitch angle data. Thus, during the grid-connected speed control stage, the pitch angle of the wind turbine generator set is optimized based on its control parameters, thereby increasing the output power of the wind turbine generator set and improving its power generation even at low wind speeds. Attached Figure Description
[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0033] Figure 1 A schematic diagram illustrating the operating stages of a wind turbine generator set as provided in an embodiment of this application; Figure 2 A schematic diagram of a blade provided for an embodiment of this application; Figure 3 A schematic diagram of the performance curve of a wind turbine generator set provided for an embodiment of this application; Figure 4 A schematic diagram of another blade provided in an embodiment of this application; Figure 5 A schematic diagram of the performance curve of another wind turbine generator set provided in an embodiment of this application; Figure 6 A schematic diagram of another blade provided in an embodiment of this application; Figure 7 This is a schematic diagram of a scenario provided for an embodiment of this application; Figure 8 A flowchart illustrating a control method for a wind turbine generator set provided in an embodiment of this application; Figure 9A schematic diagram of the performance curve of a wind turbine generator set provided for an embodiment of this application; Figure 10 A schematic diagram of a wind speed probability distribution curve provided for an embodiment of this application; Figure 11 A schematic diagram illustrating a third correspondence relationship provided in an embodiment of this application; Figure 12 A schematic diagram illustrating a first correspondence relationship provided in an embodiment of this application; Figure 13 A schematic diagram illustrating the relationship between pitch angle and wind speed, provided for an embodiment of this application; Figure 14 A schematic diagram illustrating a power variation according to an embodiment of this application; Figure 15 A schematic diagram illustrating another relationship between pitch angle and wind speed provided for an embodiment of this application; Figure 16 A schematic diagram of the structure of a control device for a wind turbine generator set provided in an embodiment of this application; Figure 17 A schematic diagram illustrating another correspondence between pitch angle and wind speed provided in an embodiment of this application; Figure 18 This is a schematic diagram illustrating the correspondence between pitch angle and power provided in an embodiment of this application. Detailed Implementation
[0034] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the embodiments of this application will be further described in detail below with reference to the accompanying drawings and specific implementation methods.
[0035] To facilitate understanding and explanation of the technical solutions provided in the embodiments of this application, the background technology involved in the embodiments of this application will be introduced first.
[0036] Currently, wind turbines are primarily pitch-regulated wind turbines, meaning the blade angle can be adjusted according to changes in wind speed. Based on wind speed, the operation of a wind turbine can be divided into four stages. See also... Figure 1 As shown in the figure, this is a schematic diagram of the operation stage of a wind turbine generator set provided in an embodiment of this application. The horizontal axis represents wind speed, and the vertical axis represents numerical values. Line A represents the rotational speed of the wind turbine generator set. Line B represents the power of the wind turbine generator set. Line C represents the pitch angle of the wind turbine generator set. Figure 1In the process, the first stage is the grid-connected speed control stage. The second stage is the optimal gain control stage, also known as the optimal tip speed ratio control stage. The third stage is the torque closed-loop control stage. The fourth stage is the pitch angle closed-loop control stage. Closed-loop control is a control method in which the controlled output is fed back to the control input, exerting a control effect on the input.
[0037] The grid-connected speed control stage refers to the control phase in which the wind turbine's speed is maintained at its minimum speed by the motor torque. In this stage, the first phase, the wind turbine's power gradually increases with wind speed. Once the grid-connected torque is reached, the wind turbine's control switches to the optimal gain control stage, the second phase. Optimal gain control strategy refers to using the optimal gain control method when the wind turbine's speed is below its rated speed, ensuring the wind turbine operates at its optimal power coefficient. In the second phase, the wind turbine is in a propeller-open state. The blade pitch angle is a fixed value, the minimum pitch angle, typically around 0°. After the wind turbine reaches its rated speed, it enters the third phase. In the third phase, the wind turbine's speed reaches its rated speed, but the output power does not reach the rated power. The pitch angle remains open. After the wind turbine's output power reaches the rated power, it enters the fourth phase. In the fourth stage, the wind turbine generator sets reach their rated power, and the rotational speed of the wind turbine generator sets is controlled by the pitch angle.
[0038] Blade element momentum theory is a method for calculating the aerodynamic loads on wind turbine blades. A blade element is a series of micro-segments along the span of the wind turbine blade. Blade element momentum theory combines momentum theory with the principle of force equilibrium in two-dimensional airfoils, obtaining a closed-form solution by iteratively solving the momentum equation. For the aerodynamic characteristics analysis of two-dimensional airfoils based on blade element momentum theory, see [link to relevant documentation]. Figure 2 As shown, this figure is a schematic diagram of a blade provided in an embodiment of this application. Wherein, This refers to the angle of attack. The angle of attack is the angle between the airflow velocity vector and the airfoil chord. This refers to the inflow angle. The inflow angle is the angle formed by the linear velocity of the leaf element and the velocity of the incoming flow. Indicates the propeller pitch angle. This indicates the aerodynamic twist angle corresponding to the leaf element. This indicates the torsional deformation corresponding to a specific leaf element. When the torsional deformation of the leaf is relatively small... W represents the flow velocity. L represents lift, and D represents drag. For axial induced wind speed, This refers to the circumferential induced velocity.
[0039] In the first stage, which is the grid-connected speed control stage, as the wind speed increases, the inflow angle of the wind turbine blades continuously increases, the blades deviate from the optimal angle of attack, resulting in a decrease in the power coefficient, which in turn causes the wind turbine to fail to achieve the optimal output power.
[0040] For example, see Figure 3 As shown in the figure, this is a schematic diagram of the performance curve of a pitch angle adjustable wind turbine provided in an embodiment of this application. The horizontal axis represents rotational speed, and the vertical axis represents shaft power. Figure 3 The marker in the diagram indicates that the wind turbine is in the start-up state. At a wind speed of U, the pitch angle remains near 0°. See also... Figure 4 As shown, for a certain leaf element, the corresponding angle of attack is... The angle of attack for the optimal lift-to-drag ratio is The blades were not operating at the angle of attack corresponding to their optimal lift-to-drag ratio, resulting in a non-optimal power coefficient for the entire blade system.
[0041] Furthermore, as wind speed gradually increases, see... Figure 5 As shown, under the operating conditions corresponding to the marked points, the wind speed increases. The angle of attack of the wind turbine generator gradually increases. (See also...) Figure 6 As shown, under this operating condition, the pitch angle corresponding to the optimal power coefficient changes again.
[0042] Currently, during the grid-connected speed control phase, there is a lack of adjustment for the pitch angle of the wind turbine generator set, resulting in a non-optimal power coefficient. Consequently, the output power of the wind turbine generator set cannot reach the optimal output power, and wind energy is not fully utilized.
[0043] It is understandable that the shortcomings of the above solutions are the result of the applicant's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed by the embodiments of this application below should be considered contributions made by the applicant to the embodiments of this application.
[0044] Based on this, embodiments of this application provide a control method, device, and program product for a wind turbine generator set. In this method, the operating parameters of the wind turbine generator set are acquired. These operating parameters include rotor speed and motor control torque. The operating stage of the wind turbine generator set can be determined based on the operating parameters. It is then determined whether the operating parameters meet control conditions. These control conditions are used to determine that the wind turbine generator set is in the grid-connected speed control stage. If the operating parameters meet the control conditions, the control parameters are acquired. A first correspondence between the control parameters and the pitch angle is acquired. This first correspondence guides the adjustment of the wind turbine generator set's pitch angle. Based on the control parameters and the first correspondence between the control parameters and the pitch angle, target pitch angle data corresponding to the control parameters is determined. The determined target pitch angle data is the pitch angle data that allows the wind turbine generator set to achieve optimal output power under the current operating state. The wind turbine generator set is controlled based on the target pitch angle data. Thus, during the grid-connected speed control stage, the pitch angle of the wind turbine generator set is optimized based on its control parameters, thereby increasing the output power of the wind turbine generator set and achieving increased power generation at low wind speeds.
[0045] To facilitate understanding of the technical solutions provided in the embodiments of this application, the following is combined with... Figure 7 This application describes a control method for a wind turbine generator set provided in an embodiment.
[0046] The wind turbine generator control method provided in this application can be applied to the control system of wind turbine generators. Taking shaft power as an example, see [link to relevant documentation]. Figure 7 As shown, the control system comprises three modules: an analysis module, a detection module, and a control module. The analysis module analyzes the performance of the wind turbine generator, obtaining the initial correspondence between shaft power and pitch angle based on tip speed ratio and blade element momentum theory. This initial correspondence is presented in a table representing shaft power minus pitch angle. The detection module acquires operating parameters, and, when the operating parameters determine that the wind turbine generator is in the grid-connected speed control phase, acquires the shaft power. Operating parameters include, for example, rotor speed.
[0047] The control module is used to determine the target pitch angle data corresponding to the shaft power based on the shaft power and the first correspondence between the shaft power and the pitch angle, and to control the wind turbine generator set based on the target pitch angle data.
[0048] As an example, the analysis module acquires minimum thresholds for wind speed and rotor speed. Based on these minimum thresholds, the analysis module calculates a first correspondence between control parameters and pitch angle. For example, the control parameter might be shaft power (ShaftPower). Shaft power is the aerodynamic power of the wind turbine generator. This aerodynamic power excludes electrical and mechanical losses. The analysis module sends this first correspondence to the control module. The detection module acquires operating parameters, including rotor speed and motor torque. Based on these operating parameters, the detection module determines that the wind turbine generator is in the grid-connected speed control phase. The detection module sends control commands to the control module. The control module acquires the control parameters and, according to the first correspondence, determines the target pitch angle data corresponding to the control parameters. The control module then controls the wind turbine generator based on the target pitch angle data.
[0049] Those skilled in the art will understand that Figure 7 The schematic diagram shown is merely one example in which embodiments of this application can be implemented. The scope of application of the embodiments of this application is not limited by any aspect of the schematic diagram. Figure 7 The analysis module, detection module, and control module shown are, for example, virtual modules based on functional partitioning. Figure 7 The three modules shown can also have other functions. For example, the control module also calls the proportional-integral (PI) controller to calculate the motor torque and controls the wind turbine generator based on the motor torque.
[0050] The following describes a control method for a wind turbine generator set provided in an embodiment of this application.
[0051] See Figure 8 As shown, this figure is a flowchart illustrating a control method for a wind turbine generator provided in an embodiment of this application, including: S801: Obtain the operating parameters of the wind turbine generator set.
[0052] The operating parameters of a wind turbine generator set reflect its current control stage. These parameters include rotor speed and motor torque. The control stage of the wind turbine generator set is determined based on these parameters.
[0053] This application does not limit the method of acquiring the operating parameters of the wind turbine generator. In one possible implementation, operating parameters are acquired within each pre-set operating parameter acquisition cycle. In another possible implementation, operating parameters are acquired in real time.
[0054] S802: Obtain control parameters after determining that the operating parameters meet the control conditions.
[0055] Control conditions are used to determine whether the wind turbine generator is in the grid-connected speed control phase. Control conditions may include, for example, a rotor speed difference less than or equal to a minimum rotor speed threshold, and motor torque less than a grid-connected control torque threshold. The minimum rotor speed threshold, the difference threshold, and the grid-connected control torque threshold are all preset values. As an example, the difference threshold is 0. That is, the control conditions are: rotor speed at the minimum rotor speed threshold, and motor torque less than the grid-connected control torque threshold.
[0056] If the operating parameters meet the control conditions, it indicates that the wind turbine generator is in the grid-connected speed control phase. During this phase, the pitch angle of the wind turbine generator needs to be adjusted to achieve optimal output power. Output power, for example, is the shaft power.
[0057] When the wind turbine generator is in the grid-connected speed control phase, control parameters are acquired. These control parameters are used to determine the value of the pitch angle. The embodiments of this application do not limit the specific type of the control parameters. As an example, the control parameter is shaft power. As another example, the control parameter is motor torque. As yet another example, the control parameter is wind speed.
[0058] S803: Obtain the first correspondence between control parameters and pitch angle.
[0059] The initial correspondence between control parameters and pitch angle can be preset. As an example, this initial correspondence is stored in a data table. This initial correspondence can be calibrated or pre-calculated. Alternatively, it can be calculated in real-time.
[0060] As an example, embodiments of this application provide a possible implementation of calculating the first correspondence between control parameters and pitch angle, such as including steps A1 and A2.
[0061] A1: Obtain the second correspondence between tip speed ratio, control parameters, and pitch angle.
[0062] As an example, the second correspondence between tip speed ratio, control parameters, and pitch angle can be determined through calibration.
[0063] As another example, the second correspondence between tip speed ratio, control parameters, and pitch angle is determined based on the third and fourth correspondences. The third correspondence is the relationship between tip speed ratio, power coefficient of the wind turbine generator, and pitch angle. The fourth correspondence is the relationship between power coefficient and control parameters.
[0064] The third correspondence will be introduced first.
[0065] All other things being equal, the tip speed ratio of a wind turbine affects its power coefficient. A higher tip speed ratio results in higher output power. The effect of the tip speed ratio on power can be represented by a wind turbine aerodynamic curve. See also... Figure 9 As shown, this figure is a schematic diagram of the performance curve of a wind turbine generator set provided in an embodiment of this application. The performance curve of the wind turbine generator set is used to describe the power factor of the wind turbine generator. With the sharp speed ratio The pattern of change, also known as The performance curves of wind turbine generators depict the relationship between the tip speed ratio and the power coefficient. The highest power coefficient is the optimal power coefficient. The tip speed ratio corresponding to the optimal power coefficient can be expressed as: .
[0066] Furthermore, the pitch angle It will also affect the power factor. Power factor With pitch angle and sharp speed ratio There is a third correspondence. This third correspondence can be described by the wind turbine aerodynamic surface. The wind turbine aerodynamic surface describes the power coefficient. With the sharp speed ratio and propeller pitch angle The curved surface is formed by the changing pattern of the surface.
[0067] This application provides a possible implementation method for calculating the third correspondence relationship.
[0068] The expression for the third correspondence is shown in formula (1): (1) in, The local tip rate ratio of leaf extract. denoted as the tip speed ratio of the wind turbine generator set. a is the axial induction factor, and b is the circumferential induction factor.
[0069] The expressions for the axial induction factor a and the circumferential induction factor b are as follows: (2) (3) in, This is the normal thrust coefficient. is the tangential thrust coefficient. F is the Prandtl correction factor, used to correct for losses at the blade root and tip of the wind turbine. The angle of entry. For the degree of reality.
[0070] Normal thrust coefficient and tangential thrust coefficient The lift coefficient can be determined by the blade cross-section. and drag coefficient The representation is shown in formulas (4) and (5).
[0071] (4) (5) The expression for F is: (6) in, R is the number of blades, R is the rotor radius, and r is the blade radius.
[0072] Reality for: (7) in, For the number of leaves, Let be the chord length.
[0073] inflow angle It can be represented as: (8) in, The pitch angle is the propeller angle. Angle of attack. Angle of attack With lift coefficient and drag coefficient There is a corresponding relationship. Angle of attack With lift coefficient and drag coefficient The correspondence can be determined by experimental results.
[0074] Thus, based on a determined angle of attack It can determine the inflow angle. With pitch angle The correspondence between them, and the determination of the lift coefficient and drag coefficient The value. Based on the inflow angle. With pitch angle The correspondence between them, as well as formulas (4) and (5), can yield the normal thrust coefficient. With pitch angle The correspondence between them, and the tangential thrust coefficient With pitch angle The correspondence between them.
[0075] According to the inflow angle With pitch angle Correspondence between them, normal thrust coefficient With pitch angle The correspondence between them, tangential thrust coefficient With pitch angle The correspondence between them, and formulas (2) and (3), yield the relationship between the axial induction factor a and the pitch angle. The correspondence between them, and the relationship between the circumferential induction factor b and the pitch angle. The correspondence between them.
[0076] Finally, based on the axial induction factor a and the pitch angle The correspondence between the circumferential induction factor b and the propeller pitch angle Based on the correspondence between them and formula (1), the power coefficient is obtained. With sharp speed ratio and propeller pitch angle The correspondence between them.
[0077] In addition, power coefficient There is also a fourth correspondence between this and the control parameters. For example, the control parameter is shaft power. The expression for this fourth correspondence is: (9) Where P is the shaft power. For wind speed, Let A be the air density and A be the swept area of the wind turbine.
[0078] Thus, by combining the third and fourth correspondences, a second correspondence between the tip speed ratio, control parameters, and pitch angle can be obtained. The expression for the second correspondence is given in formula (10): (10) Among them, the axial induction factor a is related to the pitch angle. There is a corresponding relationship between them, as well as the relationship between the circumferential induction factor b and the pitch angle. There is a corresponding relationship between them. Air density The swept area A of the wind turbine, and the wind speed. The local tip speed ratio of folin All of these are known quantities.
[0079] Thus, based on blade element momentum theory, by integrating the local power coefficients of blade elements at different locations on the wind turbine blades, the overall power coefficient of the wind turbine is determined, resulting in a third correspondence between the wind turbine's power coefficient and tip speed ratio and pitch angle. Furthermore, from the perspective of the efficiency of converting wind kinetic energy into mechanical energy, the power coefficient of the wind turbine is determined, resulting in a fourth correspondence between the wind turbine's power coefficient and control parameters. Based on the power coefficient parameter shared by the third and fourth correspondences, a second correspondence between tip speed ratio, control parameters, and pitch angle can be determined. Furthermore, given a determined tip speed ratio, a first correspondence between control parameters and pitch angle can be determined, enabling the adjustment of the pitch angle using the first correspondence and the obtained control parameter values.
[0080] In one possible implementation, given that the power coefficient of the wind turbine meets predetermined conditions, a second correspondence between the tip speed ratio, control parameters, and pitch angle is determined based on a third and a fourth correspondence.
[0081] As an example, a predetermined condition is that the power factor is greater than or equal to a power factor threshold. The power factor threshold is a threshold determined based on the degree of wind energy utilization.
[0082] Thus, after determining the first correspondence based on the second correspondence, the pitch angle can be adjusted using the first correspondence. The adjusted wind turbine has a higher power coefficient, which can improve the shaft power and power generation of the wind turbine.
[0083] As another example, the predetermined condition is that the power coefficient is the optimal power coefficient. The optimal power coefficient is the power coefficient with the highest value within the range of possible power coefficient values. In this way, the optimal pitch angle adjustment effect can be achieved.
[0084] A2: Obtain the value of the tip speed ratio.
[0085] The tip speed ratio can be determined based on the wind speed and impeller speed, as shown in the following formula: (11) R is the impeller radius. This represents the impeller speed. This refers to wind speed.
[0086] In one possible implementation, the tip speed ratio is a preset fixed value. For example, the wind speed is a reference wind speed determined based on local meteorological data for the wind turbine. The rotor speed is a preset minimum rotor speed threshold.
[0087] Based on local meteorological data for the wind turbine generator area, plot the annual wind speed probability distribution curve. (See also...) Figure 10As shown, the wind speed probability distribution curve is a Weibull distribution curve. The Weibull distribution curve is a continuous probability distribution. The probability density is shown in the following formula: (12) (13) in, This represents the annual average wind speed. This is the shape factor. Wind speed is a variable that is typically used to describe the probability of wind speed occurring in a particular area.
[0088] The rated wind speed of the wind turbine generator is determined based on the wind speed probability distribution curve. The rated wind speed is used as the reference wind speed.
[0089] In another possible implementation, the rotor radius of the wind turbine is obtained. The wind speed and the rotor speed of the wind turbine are obtained. Based on the wind speed, the rotor speed of the wind turbine, and the rotor radius of the wind turbine, the tip speed ratio is determined. The formula for calculating the tip speed ratio is shown in formula (11).
[0090] A3: Based on the second correspondence and the tip speed ratio, determine the first correspondence between the control parameters and the pitch angle.
[0091] The second correspondence includes three variables: tip speed ratio, control parameters, and pitch angle. Based on the obtained tip speed ratio value and the second correspondence, the first correspondence between the control parameters and the pitch angle is determined.
[0092] For ease of explanation, the principle of determining the first correspondence will be explained below in conjunction with the third and fourth correspondences.
[0093] See Figure 11 As shown in the figure, this figure is a schematic diagram of a third correspondence provided in an embodiment of this application. Figure 11 In the coordinate system, the horizontal axis represents the pitch angle, and the vertical axis represents the power coefficient. The two curves represent the relationship between the power coefficient and the pitch angle when the tip speed ratio (lambda) is 15 and when the tip speed ratio (lambda) is 20, respectively.
[0094] After determining the tip speed ratio, the correspondence between the power coefficient and the pitch angle in the third correspondence can be determined, that is... Figure 11 In - Curve. Based on the fourth correspondence between control parameters and power coefficient, the first correspondence between pitch angle and control parameters can be determined.
[0095] Under the preset condition that the power coefficient is the optimal power coefficient, the correspondence between the power coefficient and the pitch angle is determined based on the tip speed ratio. Based on this correspondence, the pitch angle value corresponding to the optimal power coefficient is determined. Based on the optimal power coefficient and a fourth correspondence, the values of the control parameters are determined. A first correspondence between the control parameter values and the pitch angle values is established. This allows for a first correspondence applicable to various situations, enabling the adjustment of the wind turbine's pitch angle using this first correspondence.
[0096] As an example, taking shaft power as the control parameter, see [link to relevant documentation]. Figure 12 As shown in the figure, this figure is a schematic diagram of a first correspondence provided in an embodiment of this application.
[0097] In addition, both wind speed and motor torque are related to shaft power. Wind speed or motor torque can be used as control parameters.
[0098] In some possible implementations, the first correspondence between wind speed and pitch angle can be determined based on the correspondence between shaft power and pitch angle, and the correspondence between wind speed and shaft power.
[0099] For example, wind speed With shaft power The correspondence can be expressed by formula (14): (14) in, It is the power factor of the wind turbine generator set during actual operation.
[0100] In some other possible implementations, the first correspondence between motor torque and pitch angle can be determined based on the correspondence between power coefficient and pitch angle, and the correspondence between motor torque and power coefficient.
[0101] For example, the relationship between shaft power P and motor torque M is shown in formula (15): (15) in, This represents the impeller speed.
[0102] This allows the pitch angle value to be determined based on wind speed or motor torque, thus enabling adjustment of the pitch angle.
[0103] It should be noted that the first correspondence between control parameters and pitch angle may include multiple sub-correspondences.
[0104] As an example, the sub-correspondence includes the correspondence between the values of control parameters and the values of pitch angle. This allows for relatively precise adjustment of the pitch angle.
[0105] As another example, a sub-correspondence includes the correspondence between a control parameter belonging to a sub-value range and a pitch angle value. That is, a control parameter within a sub-value range corresponds to a pitch angle value.
[0106] As an example, multiple pitch angle values can be set between the initial and final values of the pitch angle during the grid-connected speed control phase. The number of pitch angle values can be, for example, between two and ten. Each pitch angle value corresponds to a control parameter value within a sub-range. This allows for stepped adjustment of the pitch angle, reducing the frequency of pitch angle adjustments, lowering the cost of adjusting the pitch angle while increasing shaft power, and avoiding frequent pitch angle changes.
[0107] S804: Determine the target pitch angle data corresponding to the control parameters based on the control parameters and the first correspondence between the control parameters and the pitch angle.
[0108] The target pitch angle data is used to adjust the pitch angle of the wind turbine generator set.
[0109] S805: Controls the wind turbine generator set based on the target pitch angle data.
[0110] Based on the determined target pitch angle data, the pitch angle of the wind turbine is adjusted so that the current pitch angle value of the wind turbine is the target pitch angle data, or the difference between the current pitch angle value and the target pitch angle data is less than the adjustment threshold.
[0111] The wind turbine generator control method provided in this application can adjust the pitch angle during the grid-connected speed control phase to achieve better power parameters, improve the output power of the wind turbine generator, and thus increase the power generation of the wind turbine generator.
[0112] See Figure 13 As shown, this figure is a schematic diagram illustrating the correspondence between pitch angle and wind speed according to an embodiment of this application. Before adopting the wind turbine generator control method provided in this application, the pitch angle was not adjusted during the grid-connected speed control stage. After adopting the wind turbine generator control method provided in this application, the pitch angle is flexibly adjusted. The power change of the wind turbine generator after adjusting the pitch angle is shown in [reference needed]. Figure 14 As shown, the power output of the wind turbine generator after optimizing the pitch angle is higher than that of the wind turbine generator before optimizing the pitch angle.
[0113] See Figure 15 As shown, this figure is a schematic diagram illustrating another relationship between pitch angle and wind speed provided in an embodiment of this application. The pitch angle at the initial moment of the grid-connected speed control phase... The pitch angle greater than the end time of the grid-connected speed control phase. The slope of the pitch angle as a function of wind speed is... The value of K is greater than 0.25.
[0114] In another specific embodiment, see Figure 17 This shows a schematic diagram illustrating another relationship between pitch angle and wind speed.
[0115] As an example, such as Figure 17 As shown, by executing the above control method, during the grid-connected speed control phase, the initial pitch angle of this control phase is... The corresponding cut-in wind speed is And the pitch angle at the end of this control phase is The corresponding cut-in wind speed is The wind speed is measured in m / s, and the pitch angle is measured in degrees. N represents the number of pitch angle values set between the initial and final times, which can be between 2 and 10. N pitch angles can be selected for control between the initial and final times, where the value of the i-th pitch angle ranges from [...]. , That is, in and Between, 1≤i≤N.
[0116] In this example, during the grid-connected speed control phase, the slope of the relationship between pitch angle and wind speed can be calculated using formula (16): (16) In one specific implementation, The value range can be [-3, -0.25]. It is understood that the upper and lower limits of this value range are permissible values within the allowable range for each component of the wind turbine when implementing the control method of this application. In another specific embodiment, The value range can be [-2.4, -0.4]. Compared to the aforementioned value range [-3, -0.25], the value range here is the preferred implementation scheme, which can achieve a more optimized effect. It can improve the utilization of wind energy, increase power generation, and maintain the stable performance of wind turbines.
[0117] like Figure 17 As shown, the diagram illustrates the relationship between pitch angle and wind speed under three different conditions, represented by triangles, circles, and squares, respectively. N=4, meaning four points were selected between the initial and final times for pitch angle control. According to... Figure 17 The lines containing the triangle and circle points indicate the upper and lower limits of the aforementioned slope. The slope corresponding to the curve containing the square point is...k wind =-1.6, which is within the range of values mentioned above.
[0118] In addition to using the slope method, the relationship between pitch angle and wind speed can also be calculated in other ways. For example, it can be calculated... and The ratio is used to represent the relationship between the pitch angle and the wind speed. In this case, the value of this ratio can be in the range of [0.25, 3].
[0119] In another example, such as Figure 18 The diagram illustrates a correlation between pitch angle and power. Figure 17 Similarly, by implementing the above control method, during the grid-connected speed control phase, the initial pitch angle of this control phase is... The corresponding cut-in wind speed is And the pitch angle at the end of this control phase is The corresponding cut-in wind speed is The corresponding wind turbine output power is The unit for pitch angle is deg, and the unit for power is MW. N is the number of pitch angle values set between the initial and final times, which can be between 2 and 10. N pitch angles can be selected for control between the initial and final times, where the value of the i-th pitch angle ranges from [...]. , That is, in and Between, 1≤i≤N.
[0120] Based on the generator's rated power Based on this, normalizing the output power yields the following equation (17): (17) Substituting formula (17) into formula (16), the slope of the relationship between pitch angle and power can be calculated using formula (18): (18) In one specific implementation, The value range can be [-50, -5]. It is understood that the upper and lower limits of this value range are permissible values within the allowable range for each component of the wind turbine when implementing the control method of this application. In another specific embodiment, The value range can be [-45, -7.5]. Compared to the aforementioned value range [-50, -5], the value range here is the preferred embodiment, which can achieve a more optimized effect. It can improve the utilization of wind energy, increase power generation, and maintain the stable performance of wind turbines.
[0121] like Figure 18 As shown, the diagram illustrates the relationship between pitch angle and power in three scenarios using triangles, circles, and squares, respectively. N=4, meaning four points were selected between the initial and final times for pitch angle control. According to... Figure 18 The lines containing the square and triangle points indicate the upper and lower limits of the aforementioned slopes. The slope of the curve containing the circle point falls within the aforementioned range.
[0122] In addition to using the slope method, the relationship between pitch angle and power can also be calculated in other ways. For example, it can be calculated... and The ratio is used to represent the relationship between pitch angle and power. In this case, the value of this ratio can be in the range of [5, 50].
[0123] This improves the power generation of wind turbines at low wind speeds during the grid connection speed control phase. Low wind speed refers to wind speeds below the rated wind speed. Furthermore, the wind turbine control method provided in this application does not require modification or upgrading of the wind turbine hardware, enabling low-cost adjustment of the blade pitch angle and accelerating the grid connection speed of the wind turbine.
[0124] Based on the control method for a wind turbine generator set provided in the above-described embodiments, this application also provides a control device for a wind turbine generator set. The control device for the wind turbine generator set will be described below with reference to the accompanying drawings.
[0125] See Figure 16 As shown in the figure, this is a structural schematic diagram of a control device for a wind turbine generator set provided in an embodiment of this application. Figure 16 As shown, the control device for this wind turbine generator set includes: The first acquisition module 1601 is used to acquire the operating parameters of the wind turbine generator set, including the rotor speed and the motor torque. The second acquisition module 1602 is used to acquire control parameters when it is determined that the operating parameters meet the control conditions, wherein the control conditions are used to determine that the wind turbine generator set is in the grid-connected speed control stage. The third acquisition module 1603 is used to acquire the first correspondence between control parameters and pitch angle; The determining module 1604 is used to determine the target pitch angle data corresponding to the control parameters based on the control parameters and the first correspondence between the control parameters and the pitch angle; The control module 1605 is used to control the wind turbine generator set according to the target pitch angle data.
[0126] Optionally, the third acquisition module 1603 is used to acquire a first correspondence between control parameters and pitch angle, including: The third acquisition module 1603 is used to acquire a second correspondence between the tip speed ratio, control parameters and pitch angle; acquire the value of the tip speed ratio; and determine a first correspondence between the control parameters and the pitch angle based on the second correspondence and the value of the tip speed ratio.
[0127] Optionally, the third acquisition module 1603 is used to acquire a second correspondence between the tip speed ratio, control parameters, and pitch angle, including: The third acquisition module 1603 is used to determine a third correspondence between the tip speed ratio, the power coefficient of the wind turbine generator set, and the pitch angle; determine a fourth correspondence between the power coefficient of the wind turbine generator set and the control parameters; and determine a second correspondence between the tip speed ratio, the control parameters, and the pitch angle based on the third and fourth correspondences.
[0128] Optionally, the third acquisition module 1603 is used to determine a second correspondence between the tip speed ratio, control parameters, and propeller pitch angle based on the third and fourth correspondences, including: The third acquisition module 1603 is used to determine the second correspondence between the tip speed ratio, control parameters and pitch angle based on the third correspondence and the fourth correspondence when the power coefficient of the wind turbine meets the predetermined conditions.
[0129] Optionally, the predetermined condition is that the power coefficient of the wind turbine generator set is greater than or equal to the power coefficient threshold.
[0130] Optionally, the third acquisition module 1603 is used to acquire the value of the tip speed ratio, including: The third acquisition module 1603 is used to acquire the wind speed, the rotor speed of the wind turbine generator set, and the rotor radius of the wind turbine generator set; and to determine the tip speed ratio based on the rotor speed, the wind speed, and the rotor radius.
[0131] Optionally, the first correspondence between the control parameters and the pitch angle includes multiple sub-correspondences, wherein the sub-correspondences include the correspondence between a control parameter belonging to a sub-value range and a pitch angle value.
[0132] Optionally, the control conditions are that the difference between the impeller speed and the minimum impeller speed threshold is less than or equal to the difference threshold, and the motor torque is less than the grid-connected control torque threshold.
[0133] Optionally, the first correspondence between the control parameters and the pitch angle is the first correspondence between the shaft power and the pitch angle; Alternatively, the first correspondence between the control parameters and the pitch angle is the first correspondence between the motor torque and the pitch angle; Alternatively, the first correspondence between the control parameters and the pitch angle is the first correspondence between the wind speed and the pitch angle.
[0134] Based on the control method for a wind turbine generator provided in the above-described method embodiments, this application provides a device, including: a processor, a memory, and a system bus; The processor and the memory are connected via the system bus; The memory is used to store one or more programs, the one or more programs including instructions, which, when executed by the processor, cause the processor to perform the control method of the wind turbine generator set described in any of the above embodiments.
[0135] In one specific embodiment, the above-mentioned equipment is integrated into the controller of the wind turbine generator set.
[0136] Based on the wind turbine generator control method provided in the above-described method embodiments, this application provides a computer-readable storage medium storing instructions. When the instructions are executed on a terminal device, the terminal device performs the wind turbine generator control method described in any of the above embodiments.
[0137] Based on the wind turbine generator control method provided in the above embodiments, this application also provides a computer program product. The computer program product may be software or program products containing instructions, capable of running on a computing device or stored on any usable medium. When the computer program product runs on at least one computing device, it causes the at least one computing device to execute the wind turbine generator control method.
[0138] Based on the control method for a wind turbine generator set provided in the above-described method embodiments, this application also provides a wind turbine generator set, which includes a controller for executing the above-described control method for the wind turbine generator set.
[0139] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems or apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple, and relevant parts can be referred to the method section.
[0140] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.
[0141] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0142] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented directly by hardware, a software module executed by a processor, or a combination of both. The software module can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.
[0143] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A control method for a wind turbine generator set, characterized in that, The method includes: Obtain the operating parameters of the wind turbine generator set, including rotor speed and motor torque; If the operating parameters are determined to meet the control conditions, the control parameters are obtained. The control conditions are used to determine that the wind turbine generator set is in the grid-connected speed control stage. Obtain the first correspondence between control parameters and propeller pitch angle; Based on the control parameters and the first correspondence between the control parameters and the pitch angle, the target pitch angle data corresponding to the control parameters is determined; The wind turbine generator set is controlled based on the target pitch angle data.
2. The method according to claim 1, characterized in that, The acquisition of the first correspondence between the control parameters and the pitch angle includes: Obtain the second correspondence between tip speed ratio, control parameters, and pitch angle; Obtain the value of the tip speed ratio; Based on the second correspondence and the value of the tip speed ratio, a first correspondence between the control parameters and the pitch angle is determined.
3. The method according to claim 2, characterized in that, The acquisition of the second correspondence between the tip speed ratio, control parameters, and pitch angle includes: Determine the third correspondence between tip speed ratio, power coefficient of wind turbine generator set, and pitch angle; Determine the fourth correspondence between the power coefficient and control parameters of the wind turbine generator set; Based on the third and fourth correspondences, a second correspondence is determined between the tip speed ratio, control parameters, and pitch angle.
4. The method according to claim 3, characterized in that, The step of determining the second correspondence between the tip speed ratio, control parameters, and propeller pitch angle based on the third and fourth correspondences includes: When the power coefficient of the wind turbine meets the predetermined conditions, a second correspondence between the tip speed ratio, control parameters and pitch angle is determined according to the third correspondence and the fourth correspondence.
5. The method according to claim 4, characterized in that, The predetermined condition is that the power coefficient of the wind turbine generator set is greater than or equal to the power coefficient threshold.
6. The method according to claim 2, characterized in that, The process of obtaining the tip speed ratio includes: Obtain wind speed, rotor speed of the wind turbine generator set, and rotor radius of the wind turbine generator set; The tip speed ratio is determined based on the impeller rotational speed, the wind speed, and the impeller radius.
7. The method according to claim 1, characterized in that, The first correspondence between the control parameters and the pitch angle includes multiple sub-correspondences, each sub-corresponding to a control parameter belonging to a sub-value range and a pitch angle value.
8. The method according to any one of claims 1-7, characterized in that, The control conditions are that the difference between the impeller speed and the minimum impeller speed threshold is less than or equal to the difference threshold, and the motor torque is less than the grid-connected control torque threshold.
9. The method according to any one of claims 1-7, characterized in that, The first correspondence between the control parameters and the pitch angle is the first correspondence between the shaft power and the pitch angle; Alternatively, the first correspondence between the control parameters and the pitch angle is the first correspondence between the motor torque and the pitch angle; Alternatively, the first correspondence between the control parameters and the pitch angle is the first correspondence between the wind speed and the pitch angle.
10. The method according to claim 1, characterized in that, The target pitch angle data includes a first pitch angle value at the start time of the grid-connected speed control phase and a second pitch angle value at the end time of the grid-connected speed control phase. The control method further includes: Obtain the first wind speed at the start time of the grid-connected speed control phase and the second wind speed at the end time of the grid-connected speed control phase; Wherein, the first wind speed, the second wind speed, the first pitch angle value, and the second pitch angle value satisfy: The ratio between the first difference between the second pitch angle value and the first pitch angle value and the second difference between the second wind speed and the first wind speed is in the range of [-3, -0.25] or [0.25, 3].
11. The method according to claim 10, characterized in that, The first wind speed is The second wind speed is The first pitch angle value is The second pitch angle value is ,and , , and satisfy: -2.4≤ ≤-0.4， in, and The unit is m / s. and The unit is deg.
12. The method according to claim 1, characterized in that, The target pitch angle data includes a first pitch angle value at the start time of the grid-connected speed control phase and a second pitch angle value at the end time of the grid-connected speed control phase. The control method further includes: Obtain a first ratio between the wind turbine generator output power at the end of the grid-connected speed control phase and the wind turbine generator rated power. Wherein, the first ratio, the first pitch angle value, and the second pitch angle value satisfy: The first difference between the second pitch angle value and the first pitch angle value, and the ratio between the first ratio, is in the range of [-50, -5] or [5, 50].
13. The method according to claim 12, characterized in that, The output power is The rated power is The first ratio is: The first pitch angle value is The second pitch angle value is ,and , ,and satisfy: -45≤ ≤-7.5， in, and The unit is deg. and The unit is MW.
14. An electronic device, characterized in that, include: One or more processors; Storage device, on which one or more programs are stored, When the one or more programs are executed by the one or more processors, the one or more processors implement the control method for a wind turbine generator as described in any one of claims 1-13.
15. The electronic device as claimed in claim 14, characterized in that, The electronic equipment is integrated into the controller of the wind turbine generator set.
16. A computer program product, characterized in that, When the computer program product is run on the device, it causes the device to perform the control method of the wind turbine generator set according to any one of claims 1-13.
17. A wind turbine generator set, characterized in that, The wind turbine generator set includes a controller for performing the control method of the wind turbine generator set as described in any one of claims 1 to 13.