Fan variable pitch and yaw control method and system

Abstract

The invention relates to a fan variable pitch and yaw control method and system.The method comprises the steps that under different load working conditions of a wind turbine generator, first power generation performance differences between every two adjacent yaw angles are obtained through calculation; under different load working conditions of the wind turbine generator, second power generation performance differences between every two adjacent propeller pitch angles are obtained through calculation; and under the same current load working condition of the wind turbine generator, based on the first power generation performance difference and the second power generation performance difference, the priority execution sequence of the yaw control strategy and the variable pitch control strategy is determined. Through the method and the device, power generation capacity evaluation of yaw and variable pitch under different load working conditions is realized, the strategy execution priority is reasonably determined based on the power generation performance difference brought by two control strategies so as to effectively improve the power generation performance of the unit, and the problem of how to improve the power generation performance of the wind turbine generator by utilizing variable pitch and yaw is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind power generation, in particular to a wind turbine variable pitch and yaw control method and system. BACKGROUND

[0002] In a wind power generation system, variable pitch control mainly adjusts the attack angle (pitch angle) of the wind turbine blade to adapt to different wind speed conditions, and yaw control is used to adjust the orientation of the wind wheel to ensure that the included angle (yaw angle) between the orientation of the wind wheel and the wind direction is appropriate. Variable pitch control and yaw control are two key control technologies in wind power generation, which work independently and cooperatively with each other, so that the wind turbine generator can efficiently and stably convert wind energy into electrical energy.

[0003] In the existing wind turbine control scheme, the variable pitch strategy and the yaw strategy are usually formulated and executed separately as two independent wind turbine control strategies, and there is a lack of systematic research on the priority execution order of the two control strategies. For example, the patent with application number 202510679211.0 discloses a monitoring method for a wind turbine variable pitch system, which mainly matches and calculates the wind turbine variable pitch angle by analyzing the collected wind turbine pitch image.

[0004] At present, there is no effective solution to the problem of how to use variable pitch and yaw to improve the power generation performance of a wind turbine generator in the related art. SUMMARY

[0005] The embodiments of the present application provide a wind turbine variable pitch and yaw control method and system to at least solve the problem of how to use variable pitch and yaw to improve the power generation performance of a wind turbine generator in the related art.

[0006] In a first aspect, the embodiments of the present application provide a wind turbine variable pitch and yaw control method, which comprises: In different load conditions of the wind turbine generator, a first power generation performance difference between each adjacent yaw angle is calculated respectively; In different load conditions of the wind turbine generator, a second power generation performance difference between each adjacent pitch angle is calculated respectively; In the same current load condition of the wind turbine generator, based on the first power generation performance difference and the second power generation performance difference, the priority execution order of the yaw control strategy and the variable pitch control strategy is determined.

[0007] In some of the embodiments, calculating the first power generation performance difference between each adjacent yaw angle in different load conditions of the wind turbine generator comprises: For different load conditions of the wind turbine generator, the power generation performance of the wind turbine generator corresponding to different yaw angles in each load condition is calculated; For each load condition, a first power generation performance difference between each adjacent yaw angle is calculated based on the power generation performance of the different yaw angles.

[0008] In some embodiments, the calculating the power generation performance of the wind turbine corresponding to different yaw angles under each load condition of the wind turbine comprises: a range of values of the yaw angle of the wind turbine is equally divided to obtain a plurality of equally spaced yaw angles, wherein a unit length of the equally spaced division is 0.5 degrees; For different load conditions of the wind turbine, the power generation output power of the wind turbine corresponding to each of the equally spaced yaw angles under each load condition is calculated, wherein the power generation output power represents the power generation performance of the wind turbine.

[0009] In some embodiments, the calculating the first power generation performance difference between each adjacent yaw angle for each load condition based on the power generation performance of the different yaw angles comprises: For each load condition, a data point correlation relationship between each of the equally spaced yaw angles and the power generation output power is established; Based on the data point correlation relationship, the first power generation performance difference between each adjacent equally spaced yaw angle is calculated.

[0010] In some embodiments, the calculating the second power generation performance difference between each adjacent pitch angle under different load conditions of the wind turbine comprises: For different load conditions of the wind turbine, the power generation performance of the wind turbine corresponding to different pitch angles under each load condition is calculated; For each load condition, a second power generation performance difference between each adjacent pitch angle is calculated based on the power generation performance of the different pitch angles.

[0011] In some embodiments, the calculating the power generation performance of the wind turbine corresponding to different pitch angles under each load condition of the wind turbine comprises: a range of values of the pitch angle of the wind turbine is equally divided to obtain a plurality of equally spaced pitch angles, wherein a unit length of the equally spaced division is 0.5 degrees; For different load conditions of the wind turbine, the power generation output power of the wind turbine corresponding to each of the equally spaced pitch angles under each load condition is calculated, wherein the power generation output power represents the power generation performance of the wind turbine.

[0012] In some embodiments, for each load condition, the second power generation performance difference between each adjacent pitch angle is calculated based on the power generation performance of the different pitch angles. For each load condition, a data point correlation between each equidistant pitch angle and the power generation output is established. Based on the data point correlation, the second power generation performance difference between each adjacent equidistant pitch angle is calculated.

[0013] In some embodiments, under the same current load condition of the wind turbine, the priority execution order of the yaw control strategy and the pitch control strategy is determined based on the first power generation performance difference and the second power generation performance difference. Under the same current load condition of the wind turbine, the current yaw angle and the current pitch angle of the wind turbine are determined. Based on the current yaw angle and the current pitch angle, a target first power generation performance difference and a target second power generation performance difference are respectively determined. Based on the target first power generation performance difference and the target second power generation performance difference, the priority execution order of the yaw control strategy and the pitch control strategy is determined.

[0014] In some embodiments, based on the target first power generation performance difference and the target second power generation performance difference, the priority execution order of the yaw control strategy and the pitch control strategy is determined. Based on the ratio of the target first power generation performance difference to the target second power generation performance difference, the priority execution order of the yaw control strategy and the pitch control strategy is determined. If the ratio is greater than 1, the yaw control strategy is executed first; if the ratio is equal to 1, there is no priority execution order; and if the ratio is less than 1, the pitch control strategy is executed first.

[0015] In a second aspect, the embodiments of the present application provide a wind turbine pitch and yaw control system, which is used to execute the method of the first aspect, and the system comprises a first calculation module, a second calculation module, and a sequence determination module. The first calculation module is configured to calculate a first power generation performance difference between each adjacent yaw angle under different load conditions of a wind turbine. The second calculation module is configured to calculate a second power generation performance difference between each adjacent pitch angle under different load conditions of the wind turbine. The sequence determination module is used to determine the priority execution order of the yaw control strategy and the pitch control strategy based on the first power generation performance difference and the second power generation performance difference under the same current load condition of the wind turbine.

[0016] Compared to related technologies, the present application provides a wind turbine pitch and yaw control method and system. This method calculates the first power generation performance difference between each adjacent yaw angle under different load conditions of the wind turbine; it also calculates the second power generation performance difference between each adjacent pitch angle under different load conditions of the wind turbine; and under the same current load condition of the wind turbine, it determines the priority execution order of the yaw control strategy and the pitch control strategy based on the first and second power generation performance differences. This achieves the evaluation of the power generation capacity of yaw and pitch under different load conditions. Based on the power generation performance differences brought about by the two control strategies, it rationally determines the strategy execution priority to effectively improve the power generation performance of the turbine, thus solving the problem of how to use pitch and yaw to improve the power generation performance of wind turbines. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a flowchart of the steps of the wind turbine pitch and yaw control method according to an embodiment of this application; Figure 2 This is a schematic flowchart of a wind turbine pitch and yaw control method according to an embodiment of this application; Figure 3 This is a schematic diagram of the internal structure of an electronic device according to an embodiment of this application. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0019] Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0020] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0021] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms “a,” “an,” “an,” “the,” and similar words used in this application do not indicate quantity limitation and may indicate singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to these processes, methods, products, or devices. The terms “connected,” “linked,” “coupled,” and similar words used in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. “Multiple” used in this application refers to two or more. “And / or” describes the relationship between related objects, indicating that three relationships may exist; for example, “A and / or B” can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following objects are in an "or" relationship. The terms "first," "second," and "third" used in this application are merely to distinguish similar objects and do not represent a specific ordering of the objects.

[0022] This application provides a method for wind turbine pitch and yaw control. Figure 1 This is a flowchart illustrating the steps of the wind turbine pitch and yaw control method according to an embodiment of this application, as follows: Figure 1As shown, the method includes the following steps: Step S102: Under different load conditions of the wind turbine, the first power generation performance difference between each adjacent yaw angle is calculated respectively. Step S102 specifically includes the following steps: Step S1021: For different load conditions of the wind turbine, calculate the power generation performance of the wind turbine corresponding to different yaw angles under each load condition. Specifically, step S1021 involves dividing the range of yaw angle values ​​of the wind turbine into equal intervals to obtain several equal interval yaw angles, wherein the unit length of the equal interval division is 0.5 degrees. For different load conditions of wind turbine units, the power output of wind turbine units corresponding to each equidistant yaw angle under each load condition is calculated, where the power output represents the power generation performance of the unit.

[0023] Step S1021 preferably, Figure 2 This is a schematic flowchart of the wind turbine pitch and yaw control method according to an embodiment of this application, as shown below. Figure 2 As shown, the angle between the wind speed direction and the nacelle direction (looking from the nose to the tail) is 0° when directly opposite and 90° when perpendicular, meaning the yaw angle θ of the wind turbine ranges from 0° to 90°. Dividing this range into 180 equal parts with a unit length of 0.5°, we obtain several equidistant yaw angles {0°, 0.5°, ..., 89.5°, 90°}, and a set of each adjacent equidistant yaw angle {[0°, 0.5°], [0.5°, 1°], ..., [89°, 89.5°], [89.5°, 90°]}. Different load conditions of the wind turbine are determined by the actual wind speed, which follows the law of motion v∈[v...]. 切入 , v 切出 ], where v 切入 For the cut-in wind speed of the wind turbine, v 切出 Set the wind speed for the wind turbine. For each load condition, specify a uniform blade angle (e.g., 0° at full opening). Sequentially change the angle between the wind speed direction and the nacelle direction (viewed from nose to tail) (structurally symmetrical, clockwise or counterclockwise rotation is acceptable), changing it by 0.5° each time. Calculate the total power generation Q over a period of time. For example: when the yaw angle θ = θ1 = 0°, the turbine operates for a period of time (H hours), and the total power generation Q1 is calculated; when the yaw angle θ = θ2 = 0.5°, the turbine operates for a period of time (H hours), and the total power generation Q2 is calculated; and so on, until the yaw angle θ = θ2 = 0.5°. i When the value is 0.5°*(i-1), the unit continues to operate for a period of time (H hours), and the total power generation Q is calculated. iThen, divide the power generation by the corresponding operating time to obtain the average output power P at the equidistant yaw angle.

[0024] Step S1022: For each load condition, the first power generation performance difference between each adjacent yaw angle is calculated based on the power generation performance at different yaw angles.

[0025] Specifically, step S1022 involves establishing a data point correlation between each equidistant yaw angle and the power generation output for each load condition; and calculating the first power generation performance difference between each adjacent equidistant yaw angle based on the data point correlation.

[0026] Step S1022 preferably involves establishing a data point correlation between each equidistant yaw angle and the power generation output for each load condition, i.e., (0, P1), (0.5, P2), ..., (θ). i , P 181 Based on the correlation of these data points, the first power generation performance difference A = (P) between each adjacent equidistant yaw angle is calculated. θm -P θn ) / (|θ m -θ n |), where θ m and θ n For two adjacent equidistant yaw angles, P θm Equidistant yaw angle θ in the data point association relationship m The corresponding power output, P θn Equidistant yaw angle θ in the data point association relationship n The corresponding power output.

[0027] Optionally, the data points can also be associated with relationships such as (0, P1), (0.5, P2), ..., (θ). i , P 181 Based on this, a functional relationship between the power output P and the equidistant yaw angle θ is obtained through fitting: P=f v工况 (θ), then calculate the first power generation performance difference A.

[0028] Step S104: Under different load conditions of the wind turbine, the second power generation performance difference between each adjacent pitch angle is calculated. Step S104 specifically includes the following steps: Step S1041: For different load conditions of the wind turbine, calculate the power generation performance of the wind turbine corresponding to different pitch angles under each load condition. Specifically, step S1041 involves dividing the range of pitch angle values ​​of the wind turbine into equal intervals to obtain several equal pitch angles, wherein the unit length of the equal interval division is 0.5 degrees. For different load conditions of wind turbine units, the power output of wind turbine units corresponding to each equidistant pitch angle under each load condition is calculated, where the power output represents the power generation performance of the unit.

[0029] Step S1041 is preferably, as follows: Figure 2 As shown, the wind turbine blades have a pitch angle of 0° when fully open and 90° when fully aligned with the wind turbine blades, meaning the pitch angle φ ranges from 0° to 90°. Dividing this range into 180 equal parts with a unit length of 0.5°, we obtain several equidistant yaw angles {0°, 0.5°, ..., 89.5°, 90°}, and a set of adjacent equidistant pitch angles {[0°, 0.5°], [0.5°, 1°], ..., [89°, 89.5°], [89.5°, 90°]}. For each load condition, a uniform yaw angle is specified (e.g., 0° in a head-on wind condition). The blade opening angle is changed sequentially by 0.5° each time, and the total power generation M over a period of time is calculated. For example, when the pitch angle φ = φ1 = ... At 0°, the unit operates for a period of time (h hours), and the total power generation M1 is calculated; when the pitch angle φ = φ2 = 0.5°, the unit operates for a period of time (h hours), and the total power generation M2 is calculated; and so on, when the pitch angle φ = φ j When = 0.5°*(j-1), the unit continues to operate for a period of time (h hours), and the total power generation M is calculated. j Then, divide the power generation by the corresponding operating time to obtain the average output power N for the equidistant pitch angle.

[0030] Step S1042: For each load condition, based on the power generation performance of different pitch angles, calculate the second power generation performance difference between each adjacent pitch angle.

[0031] Specifically, in step S1042, for each load condition, a data point correlation relationship is established between each equidistant pitch angle and the power output; based on the data point correlation relationship, the second power generation performance difference between each adjacent equidistant pitch angle is calculated.

[0032] Step S1042 preferably involves establishing a data point correlation between each equidistant pitch angle and the power output for each load condition, i.e., (0, N1), (0.5, N2), ..., (φ). j , N 181Based on the correlation of these data points, the first power generation performance difference B between each adjacent equidistant yaw angle is calculated as B = (N φm -N φn ) / (|φ m -φ n |), where φ m and φ n N represents the angle between two adjacent equidistant propeller pitches. φm Equidistant pitch angle φ for data point correlation m The corresponding power output, N φn Equidistant pitch angle φ for data point correlation n The corresponding power output.

[0033] Optionally, the data point association relationships can also be set as (0, N1), (0.5, N2), ..., (φ). j , N 181 Based on this, a functional relationship P=g between the power output N and the equal pitch angle φ is obtained through fitting. v工况 (φ), then calculate the first power generation performance difference B.

[0034] Step S106: Under the same current load condition of the wind turbine, determine the priority execution order of the yaw control strategy and the pitch control strategy based on the first power generation performance difference and the second power generation performance difference.

[0035] Step S106 specifically includes the following steps: Step S1061: Under the same current load condition of the wind turbine, determine the current yaw angle and current pitch angle of the wind turbine. Step S1062: Based on the current yaw angle and the current pitch angle, determine the first target power generation performance difference and the second target power generation performance difference, respectively. It should be noted that the current yaw angle θ under the current load condition is... 当前 When a switch occurs, there is a target first power generation performance difference A. 目标 Similarly, the current pitch angle φ 当前 This also corresponds to the difference in the second power generation performance of the target company, B. 目标 .

[0036] Step S1063: Based on the difference in the first target power generation performance and the difference in the second target power generation performance, determine the priority order of execution of the yaw control strategy and the pitch control strategy.

[0037] Specifically, step S1063 determines the priority execution order of yaw control strategy and pitch control strategy based on the ratio of the difference between the first target power generation performance and the second target power generation performance; if the ratio is greater than 1, the yaw control strategy is executed first; if the ratio is equal to 1, there is no priority execution order; if the ratio is less than 1, the pitch control strategy is executed first.

[0038] Step S1063 preferably defines β as the ratio of the impact of yaw action to pitch action on power generation performance under the same current load condition. v当前工况 = A 目标 / B 目标 When the ratio is greater than 1, it means that yaw has a greater impact on the generator's power generation capacity, and the yaw control strategy should be executed first. When the ratio is equal to 1, it means that yaw and pitch have the same impact on the generator's power generation capacity, and there is no priority order. When the ratio is less than 1, it means that pitch has a greater impact on the generator's power generation capacity, and the pitch control strategy should be executed first.

[0039] The method provided in this application embodiment realizes the evaluation of the power generation capacity of yaw and pitch under different load conditions. Based on the difference in power generation performance brought about by the two control strategies, the execution priority of the strategies is reasonably determined to effectively improve the power generation performance of the unit, thus solving the problem of how to use pitch and yaw to improve the power generation performance of wind turbine units.

[0040] It should be noted that the steps shown in the above process or in the flowchart of the accompanying figures can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0041] This application provides a wind turbine pitch and yaw control system, which is used to execute the method provided in the above embodiments. The system includes a first calculation module, a second calculation module, and a sequence determination module. The first calculation module is used to calculate the first power generation performance difference between each adjacent yaw angle under different load conditions of the wind turbine. The second calculation module is used to calculate the second power generation performance difference between each adjacent pitch angle under different load conditions of the wind turbine. The sequence determination module is used to determine the priority execution order of yaw control strategy and pitch control strategy based on the first power generation performance difference and the second power generation performance difference under the same current load condition of the wind turbine.

[0042] The system provided in this application embodiment realizes the evaluation of the power generation capacity of yaw and pitch under different load conditions. Based on the difference in power generation performance brought about by the two control strategies, the priority of strategy execution is reasonably determined to effectively improve the power generation performance of the unit, thus solving the problem of how to use pitch and yaw to improve the power generation performance of wind turbine units.

[0043] It should be noted that the above modules can be functional modules or program modules, and can be implemented through software or hardware. For modules implemented through hardware, the above modules can reside in the same processor; or the above modules can be located in different processors in any combination.

[0044] This embodiment provides an electronic device including a memory and a processor. The memory stores a computer program, and the processor is configured to run the computer program to perform the steps in any of the above method embodiments.

[0045] Optionally, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor and the input / output device is connected to the processor.

[0046] Optionally, the electronic device may further include a processor, memory, network interface, display screen, and input device connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The network interface is used to communicate with external terminals via a network connection. When the computer program is executed by the processor, it implements a wind turbine pitch and yaw control method. The display screen may be a liquid crystal display (LCD) or an e-ink display. The input device may be a touch layer covering the display screen, buttons, a trackball, or a touchpad mounted on the device's casing, or an external keyboard, touchpad, or mouse.

[0047] It should be noted that the specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementations, and will not be repeated here.

[0048] Furthermore, in conjunction with the wind turbine pitch and yaw control methods in the above embodiments, this application embodiment can provide a storage medium for implementation. This storage medium stores a computer program; when executed by a processor, the computer program implements any of the wind turbine pitch and yaw control methods in the above embodiments.

[0049] In one embodiment,Figure 3 This is a schematic diagram of the internal structure of an electronic device according to an embodiment of this application, such as... Figure 3 As shown, an electronic device is provided, which can be a server, and its internal structure diagram can be as follows. Figure 3 As shown, the electronic device includes a processor, a network interface, internal memory, and non-volatile memory connected via an internal bus. The non-volatile memory stores the operating system, computer programs, and a database. The processor provides computing and control capabilities, the network interface communicates with external terminals via a network, the internal memory provides an environment for the operating system and computer programs to run, the computer programs are executed by the processor to implement a wind turbine pitch and yaw control method, and the database stores data.

[0050] Those skilled in the art will understand that Figure 3 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the electronic device to which the present application is applied. A specific electronic device may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0051] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. This computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0052] Those skilled in the art should understand that the technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A method for controlling the pitch and yaw of a wind turbine, characterized in that, The method includes: Under different load conditions of the wind turbine, the first power generation performance difference between each adjacent yaw angle was calculated. Under different load conditions of the wind turbine, the second power generation performance difference between each adjacent pitch angle was calculated. Under the same current load condition of the wind turbine, the priority execution order of the yaw control strategy and the pitch control strategy is determined based on the first power generation performance difference and the second power generation performance difference.

2. The method according to claim 1, characterized in that, Under different load conditions of the wind turbine, the differences in the first power generation performance between each adjacent yaw angle were calculated, including: For different load conditions of the wind turbine, the power generation performance of the wind turbine corresponding to different yaw angles under each load condition is calculated; For each load condition, based on the power generation performance at different yaw angles, the first power generation performance difference between each adjacent yaw angle is calculated.

3. The method according to claim 2, characterized in that, For different load conditions of the wind turbine, the power generation performance of the wind turbine corresponding to different yaw angles under each load condition is calculated as follows: The range of yaw angle values ​​for wind turbine units is divided into several equally spaced yaw angles, wherein the unit length of the equally spaced division is 0.5 degrees. For different load conditions of the wind turbine, the power output of the wind turbine corresponding to each equidistant yaw angle under each load condition is calculated, wherein the power output represents the power generation performance of the turbine.

4. The method according to claim 3, characterized in that, For each load condition, based on the power generation performance at different yaw angles, the first power generation performance difference between each adjacent yaw angle is calculated as follows: For each load condition, establish a data point correlation relationship between each equidistant yaw angle and the power generation output; Based on the correlation of the data points, the first power generation performance difference between each adjacent equidistant yaw angle is calculated.

5. The method according to claim 1, characterized in that, Under different load conditions of the wind turbine, the differences in the second power generation performance between each adjacent pitch angle were calculated, including: For different load conditions of the wind turbine, the power generation performance of the wind turbine corresponding to different pitch angles under each load condition is calculated; For each load condition, based on the power generation performance of the different pitch angles, the second power generation performance difference between each adjacent pitch angle is calculated.

6. The method according to claim 5, characterized in that, For different load conditions of the wind turbine, the power generation performance of the wind turbine corresponding to different pitch angles under each load condition is calculated as follows: The range of pitch angle values ​​for wind turbine units is divided into several equally spaced pitch angles, wherein the unit length of the equally spaced division is 0.5 degrees. For different load conditions of the wind turbine, the power output of the wind turbine corresponding to each equidistant pitch angle under each load condition is calculated, wherein the power output represents the power generation performance of the turbine.

7. The method according to claim 6, characterized in that, For each load condition, based on the power generation performance at different pitch angles, the second power generation performance difference between each adjacent pitch angle is calculated, including: For each load condition, establish a data point correlation relationship between each equidistant pitch angle and the power output; Based on the correlation of the data points, the second power generation performance difference between each adjacent equidistant pitch angle is calculated.

8. The method according to claim 1, characterized in that, Under the same current load condition of the wind turbine, based on the first power generation performance difference and the second power generation performance difference, the priority execution order of the yaw control strategy and the pitch control strategy is determined as follows: Under the same current load condition of the wind turbine, determine the current yaw angle and current pitch angle of the wind turbine. Based on the current yaw angle and the current pitch angle, the first target power generation performance difference and the second target power generation performance difference are determined respectively. Based on the difference in the first and second target power generation performance, the priority order for executing the yaw control strategy and the pitch control strategy is determined.

9. The method according to claim 8, characterized in that, Based on the difference in the first target power generation performance and the difference in the second target power generation performance, the priority order for executing the yaw control strategy and the pitch control strategy is determined as follows: Based on the ratio of the difference between the first target power generation performance and the difference between the second target power generation performance, the priority execution order of the yaw control strategy and the pitch control strategy is determined. If the ratio is greater than 1, the yaw control strategy is executed first; if the ratio is equal to 1, there is no priority order; if the ratio is less than 1, the pitch control strategy is executed first.

10. A wind turbine pitch and yaw control system, characterized in that, The system is used to perform the method according to any one of claims 1 to 9, and the system includes a first calculation module, a second calculation module, and a sequence determination module; The first calculation module is used to calculate the first power generation performance difference between each adjacent yaw angle under different load conditions of the wind turbine. The second calculation module is used to calculate the second power generation performance difference between each adjacent pitch angle under different load conditions of the wind turbine. The sequence determination module is used to determine the priority execution order of the yaw control strategy and the pitch control strategy based on the first power generation performance difference and the second power generation performance difference under the same current load condition of the wind turbine.

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