Wind turbine load control method, device, computer readable medium, and apparatus

Abstract

The application provides a wind turbine load control method, device, computer readable medium and equipment, relates to the wind power generation technical field, and the method comprises the following steps: acquiring the environment wind speed and wind direction of the current time in real time; in the case of determining that the wind speed and wind direction meet the preset wind condition, the wind speed and wind direction are matched with the preset wind speed threshold value and the preset wind direction threshold value respectively; if the wind speed is greater than the wind speed threshold value and the wind direction is greater than the wind direction threshold value, the output torque of the wind turbine is controlled to be the target torque, and the target torque is lower than the preset output torque of the wind turbine. The application can acquire the environment wind speed and wind direction of the wind turbine in real time, and when it is determined that the current wind speed and wind direction meet the preset wind condition, and the wind speed and wind direction are greater than the preset wind speed threshold value and the wind direction threshold value respectively, the output torque of the wind turbine is controlled to be reduced, so that the load of the wind turbine is reduced, the loss of the wind turbine components under extreme wind conditions is reduced, and the service life of the wind turbine components is prolonged.

Description

Technical Field

[0001] This application relates to the field of wind power generation technology, specifically to a wind turbine load control method, a wind turbine load control device, a computer-readable medium, and a terminal device. Background Technology

[0002] With the increasing number of wind turbine installations and the growing capacity of individual units, higher demands are being placed on the adaptability and reliability of wind turbine generator sets. Currently, GL and IEC standards, as the mainstream design specifications for wind turbine generator set load design, clearly require that extreme coherent gust (ECD) wind conditions with changing direction be considered in the design. When the generator set is subjected to extreme strong winds with changing direction superimposed with extreme continuous gusts with changing direction, both wind speed and wind direction change drastically. This operating condition will cause the load on wind turbine generator set components to change rapidly, significantly impacting the lifespan of the turbine components. Therefore, it is necessary to adjust the control strategy for unit operation to minimize the load on the unit under extreme wind conditions.

[0003] Application content

[0004] The purpose of this application is to provide a wind turbine load control method, device, computer-readable medium, and equipment to solve the problem that the prior art is unable to reduce the load of the turbine under extreme wind conditions.

[0005] To achieve the above objectives, the first aspect of this application provides a wind turbine load control method, comprising:

[0006] Real-time acquisition of ambient wind speed and direction;

[0007] If the wind speed and wind direction meet the preset wind conditions, the wind speed and wind direction are matched with preset wind speed thresholds and preset wind direction thresholds, respectively.

[0008] If the wind speed is greater than the wind speed threshold and the wind direction is greater than the wind direction threshold, the output torque of the wind turbine is controlled to be the target torque, which is lower than the preset output torque of the wind turbine.

[0009] Optionally, after controlling the output torque of the wind turbine to the target torque, the method further includes:

[0010] The system continuously acquires ambient wind speed and direction until the acquired wind speed is no greater than the wind speed threshold and / or the acquired wind direction is no greater than the wind direction threshold, and controls the output torque of the wind turbine to the preset output torque.

[0011] Optionally, the wind speed threshold includes a first wind speed threshold and a second wind speed threshold, wherein the first wind speed threshold is less than the second wind speed threshold; the wind direction threshold includes a first wind direction threshold and a second wind direction threshold, wherein the first wind direction threshold is less than the second wind direction threshold; if the wind speed is greater than the wind speed threshold and the wind direction is greater than the wind direction threshold, controlling the output torque of the wind turbine to the target torque includes:

[0012] If the wind speed is greater than the first wind speed threshold and less than the second wind speed threshold, and the wind direction is greater than the first wind direction threshold and less than the second wind direction threshold, the output torque of the wind turbine is controlled to be the first target torque;

[0013] If the wind speed is greater than the second wind speed threshold and the wind direction is greater than the second wind direction threshold, the output torque of the wind turbine is controlled to be the second target torque;

[0014] The first target torque is greater than the second target torque, and the first target torque is less than the preset output torque.

[0015] Optionally, the step of determining whether the wind speed and wind direction meet the preset wind conditions includes:

[0016] Get the historical wind speed and historical wind direction for n consecutive historical moments before the current moment;

[0017] Determine the wind speed difference between the stated wind speed and each historical wind speed, and determine the wind direction difference between the stated wind direction and each historical wind direction;

[0018] If there is a wind speed difference greater than a preset wind speed difference threshold, and a wind direction difference greater than a preset wind direction difference threshold, then the wind speed and the wind direction are determined to meet the preset wind conditions.

[0019] Optionally, the step of determining whether the wind speed and wind direction meet the preset wind conditions includes:

[0020] Get the historical wind speed and historical wind direction for n consecutive historical moments before the current moment;

[0021] Determine the average wind speed for all historical wind speeds, and the average wind direction for all historical wind directions;

[0022] Determine the wind speed difference between the wind speed and the average wind speed, and determine the wind direction difference between the wind direction and the average wind direction;

[0023] The wind speed difference is matched with a preset wind speed difference threshold, and the wind direction difference is matched with a preset wind direction difference threshold difference.

[0024] If the wind speed difference is greater than the wind speed difference threshold and the wind direction difference is greater than the wind direction difference threshold, then the wind speed and the wind direction are determined to meet the preset wind conditions.

[0025] Optionally, the step of determining whether the wind speed and wind direction meet the preset wind conditions includes:

[0026] The wind speed and wind direction are matched with a preset wind condition table or a preset wind condition curve. If the wind speed and wind direction can match the wind condition table or wind condition curve, it is determined that the wind speed and wind direction meet the preset wind conditions.

[0027] The wind condition table or the wind condition curve shall at least include the mapping relationship between different wind speeds and corresponding wind directions that satisfy the preset wind conditions.

[0028] Optionally, the preset wind condition is an ECD wind condition, the preset wind condition table is an ECD wind condition table, and the preset wind condition curve is an ECD wind condition curve;

[0029] The ECD wind condition table or the ECD wind condition curve shall at least include the mapping relationship between different wind speeds and corresponding wind directions that satisfy the ECD wind condition.

[0030] A second aspect of this application provides a wind turbine load control device, comprising:

[0031] The data acquisition module is configured to acquire the ambient wind speed and direction in real time.

[0032] The output torque control module is configured to match the wind speed and wind direction with preset wind speed thresholds and preset wind direction thresholds, respectively, when it is determined that the wind speed and wind direction meet preset wind conditions.

[0033] If the wind speed is greater than the wind speed threshold and the wind direction is greater than the wind direction threshold, the output torque of the wind turbine is controlled to be the target torque, which is lower than the preset output torque of the wind turbine.

[0034] A third aspect of this application provides a computer-readable medium storing a computer program that, when executed by a processor, implements the aforementioned wind turbine load control method.

[0035] A fourth aspect of this application provides a terminal device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the wind turbine load control method described above.

[0036] The embodiments provided in this application have the following beneficial effects:

[0037] This application can acquire the ambient wind speed and direction of the wind turbine in real time, and when it is determined that the current wind speed and direction meet the preset wind conditions and the wind speed and direction are greater than the preset wind speed threshold and wind direction threshold respectively, control the output torque of the wind turbine to reduce the load on the wind turbine, thereby reducing the wear and tear on the wind turbine components under extreme wind conditions and extending the service life of the wind turbine components.

[0038] Other features and advantages of the embodiments or implementations of this application will be described in detail in the following detailed description section. Attached Figure Description

[0039] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. In the drawings:

[0040] Figure 1 This illustration schematically shows a method flowchart of a wind turbine load control method according to an embodiment of this application;

[0041] Figure 2 The ECD wind condition curve diagram of the embodiment of this application is illustrated schematically;

[0042] Figure 3 The diagram illustrates the power variation curve of a wind turbine according to an embodiment of this application.

[0043] Figure 4 The diagram illustrates the pitch angle variation curve of a wind turbine according to an embodiment of this application.

[0044] Figure 5 The diagram illustrates the output torque variation curve of a wind turbine according to an embodiment of this application.

[0045] Figure 6 The diagram illustrates the yaw load variation curve of a wind turbine according to an embodiment of this application.

[0046] Figure 7 A schematic block diagram illustrating a wind turbine load control device according to an embodiment of this application is shown.

[0047] Figure 8 The schematic diagram illustrates a terminal device structure according to an embodiment of this application.

[0048] Explanation of reference numerals in the attached figures

[0049] 10 - Terminal device, 100 - Processor, 101 - Memory, 102 - Computer program. Detailed Implementation

[0050] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the embodiments of this application.

[0051] like Figure 1 As shown, the first aspect of this embodiment provides a wind turbine load control method, including:

[0052] S100: Real-time acquisition of ambient wind speed and direction;

[0053] S200. If the wind speed and wind direction meet the preset wind conditions, match the wind speed and wind direction with the preset wind speed threshold and the preset wind direction threshold respectively.

[0054] S300 If the wind speed is greater than the wind speed threshold and the wind direction is greater than the wind direction threshold, control the output torque of the wind turbine to the target torque, which is lower than the preset output torque of the wind turbine.

[0055] Thus, this embodiment can acquire the ambient wind speed and direction of the wind turbine in real time, and when it is determined that the current wind speed and direction meet the preset wind conditions and the wind speed and direction are greater than the preset wind speed threshold and wind direction threshold respectively, control the output torque of the wind turbine to reduce the load on the wind turbine, thereby reducing the wear and tear on the wind turbine components under extreme wind conditions and extending the service life of the wind turbine components.

[0056] Specifically, the ambient wind speed and direction of the wind turbine can be obtained using anemometers and wind direction indicators installed on the wind turbine. An anemometer measures the air velocity in the environment in which the wind turbine is currently located, while a wind direction indicator measures the air direction in the same environment. These indicators can be pre-installed at different locations on the wind turbine, such as the nacelle, to monitor the current wind speed. In this embodiment, to improve the accuracy of the collected wind speed data, the average wind speed data collected by each anemometer can be used as the current ambient wind speed. Alternatively, based on historical experience, each anemometer can be assigned a corresponding weight, and the current ambient wind speed can be calculated by weighted averaging of the wind speed data collected by all anemometers at the current moment. Similarly, one or more wind direction indicators can be pre-installed on the wind turbine to monitor the ambient wind direction. In this implementation, to improve the accuracy of the collected wind direction data, the average wind direction data collected by each anemometer can be used as the current environmental wind direction. Alternatively, based on historical experience, each anemometer can be assigned a corresponding weight, and the current environmental wind direction can be calculated by weighted averaging of the wind direction data collected by all anemometers at the current moment. It is understandable that the wind direction data collected by the anemometers is an angle value, which can represent the direction and angle of the wind. For example, taking wind direction as one of 16 directions, the correspondence between wind direction and angle range is as follows: 348.76°-11.25° corresponds to North, 11.26°-33.75° corresponds to North-Northeast, 33.76°-56.25° corresponds to Northeast, 56.26°-78.75° corresponds to East-Northeast, 78.76°-101.25° corresponds to East, 101.26°-123.75° corresponds to East-Southeast, 123.76°-146.25° corresponds to Southeast, and 146.26°-168° corresponds to East-Southeast. 0.75° corresponds to the azimuth of south-southeast; 168.76°-191.25° corresponds to the azimuth of south; 191.26°-213.75° corresponds to the azimuth of south-southwest; 213.76°-236.25° corresponds to the azimuth of southwest; 236.26°-258.75° corresponds to the azimuth of west-southwest; 258.76°-281.25° corresponds to the azimuth of west; 281.26°-303.75° corresponds to the azimuth of west-northwest; 303.76°-326.25° corresponds to the azimuth of northwest; and 326.26°-348.75° corresponds to the azimuth of north-northwest. It is understood that the above is merely an example of the correspondence between wind direction azimuth and angle ranges. The correspondence between wind direction azimuth and angle ranges can vary depending on the wind vane or specific needs. For example, wind direction azimuth can also be divided into 8 categories; this is not limited here.

[0057] After determining the current wind speed and direction, it is further determined whether the acquired wind speed and direction meet the preset wind conditions. In order not to affect the normal output of the wind turbine, extreme wind conditions are predetermined as preset wind conditions. For example, if the slope of the change in the acquired current wind speed and direction compared with the historical wind speed and direction is greater than a preset threshold, it indicates that the environmental wind conditions of the wind turbine have changed significantly and may cause damage to the wind turbine. Therefore, it is determined that the preset wind conditions are met when the slope of the change in the current wind speed and direction compared with the historical wind speed and direction is greater than the preset threshold.

[0058] In a specific example of this implementation, the steps for determining whether the wind speed and wind direction meet the preset wind conditions include:

[0059] S210. Obtain the historical wind speed and historical wind direction for n consecutive historical moments before the current moment. For example, set the ambient wind speed and ambient wind direction to be collected once per second. After obtaining the current wind speed and current wind direction, simultaneously obtain the historical wind speed and historical wind direction for 9 consecutive historical moments before the current moment. For example, if the current wind speed is collected at the 10th second and the current wind speed is V10, then the obtained historical wind speeds V9-V1 represent the wind speeds collected from the 9th second to the 1st second, respectively. The process of collecting historical wind direction is the same as that of historical wind speed, and will not be described again here.

[0060] S220. Determine the wind speed difference between the current wind speed and each historical wind speed, and determine the wind direction difference between the current wind direction and each historical wind direction; calculate the wind speed difference between the current wind speed and each historical wind speed collected, and calculate the wind direction difference between the current wind direction and each historical wind direction collected.

[0061] S230. If there is a wind speed difference greater than a preset wind speed difference threshold, and a wind direction difference greater than a preset wind direction difference threshold, then the wind speed and wind direction meet the preset wind conditions. Compare all calculated wind speed differences with the preset wind speed difference threshold to determine if the calculated wind speed difference is greater than the threshold (e.g., 15 m / s). If any wind speed difference is greater than the threshold, it indicates a significant change in wind speed within 10 seconds. Then, further compare all calculated wind direction differences with the preset wind direction difference threshold to determine if the calculated wind direction difference is greater than the threshold. If any wind direction difference is greater than the threshold, it indicates that the changes in wind speed and wind direction within 10 seconds have reached the preset extreme wind condition limits, thus confirming that the current wind speed and wind direction meet the preset wind conditions.

[0062] In another specific example of this embodiment, the step of determining whether the wind speed and wind direction meet the preset wind conditions includes:

[0063] S240. Obtain the historical wind speed and historical wind direction for the n consecutive historical moments before the current moment; see step S210, this process will not be described again here.

[0064] S250. Determine the average wind speed of all historical wind speeds and the average wind direction of all historical wind directions; average all historical wind speeds to obtain the average historical wind speed, and average all historical wind directions to obtain the average historical wind direction.

[0065] S260. Determine the wind speed difference between the wind speed and the average wind speed, and determine the wind direction difference between the wind direction and the average wind direction; calculate the wind speed difference between the current wind speed and the average wind speed, and the wind direction difference between the current wind direction and the average wind direction, respectively.

[0066] S270. Match the wind speed difference with a preset wind speed difference threshold, and match the wind direction difference with a preset wind direction difference threshold. If the wind speed difference is greater than the wind speed difference threshold and the wind direction difference is greater than the wind direction difference threshold, determine that the wind speed and wind direction meet the preset wind conditions. Similarly, if the calculated wind speed difference is greater than the wind speed difference threshold and the wind direction difference is greater than the wind direction difference threshold, it means that the changes in the current environmental wind speed and wind direction within a preset time, such as 10 seconds, have reached the preset extreme wind condition limits, and determine that the current wind speed and wind direction meet the preset wind conditions.

[0067] In another specific example of this embodiment, the step of determining whether the wind speed and wind direction meet the preset wind conditions further includes:

[0068] S280. Match the wind speed and direction with a preset wind condition table or a preset wind condition curve. If the wind speed and direction match the wind condition table or wind condition curve, determine that the wind speed and direction meet the preset wind conditions. The wind condition table or wind condition curve must at least include the mapping relationship between different wind speeds and corresponding wind directions that meet the preset wind conditions. The preset wind conditions are ECD wind conditions, the preset wind condition table is an ECD wind condition table, and the preset wind condition curve is an ECD wind condition curve. The ECD wind condition table or ECD wind condition curve must at least include the mapping relationship between different wind speeds and corresponding wind directions that meet the ECD wind conditions.

[0069] like Figure 2As shown, ECD wind conditions refer to situations where, during wind turbine operation, the wind speed suddenly increases by 15 m / s within 10 seconds, and the wind direction changes simultaneously within these 10 seconds. In this embodiment, the wind speed and wind direction changes under ECD wind conditions meet the requirements of IEC standards. In this embodiment, a wind condition table or wind condition curve that meets the ECD wind conditions is pre-constructed. The ECD wind condition table or ECD wind condition curve includes the correspondence between different wind speeds and corresponding wind directions under ECD wind conditions. For example, taking the ECD wind condition curve as an example, it can represent the changing trends of wind speed and wind direction under ECD wind conditions. For example, if the preset ECD wind condition curve shows that the wind speed changes by 15 m / s between the 10th and 20th seconds and remains constant after 20 seconds, and the wind direction changes by 60° between the 10th and 20th seconds and remains constant after 20 seconds, then the current wind speed and wind direction are matched with the ECD wind condition curve to determine whether the current wind speed and wind direction satisfy the relative relationship between wind speed and wind direction at a certain moment on the ECD wind condition curve. For example, the current wind speed and direction can be directly matched with the ECD wind condition curve. For instance, if the current wind speed is 28 m / s and the wind direction is 60°, and the ECD wind condition curve shows the same wind speed and direction at the 20th second, then the current wind speed and direction are considered to meet the ECD wind condition criteria. Alternatively, the changes in current wind speed and direction can be matched with the ECD wind condition curve. For example, if the ECD wind condition curve shows that the wind speed increased by 15 m / s and the wind direction changed by 60° between the 10th and 20th seconds, then it can be determined whether the current wind speed changed by 15 m / s and the current wind direction changed by 60° in the previous 10 seconds. If the current wind speed and direction changed by 15 m / s and 60° in the previous 10 seconds, then the analysis will determine whether the current wind speed and wind direction changed by 15 m / s and 60° in the previous 10 seconds. If the changes in wind speed and direction satisfy 15 m / s and 60° respectively, then the current wind speed and direction are considered to meet the ECD wind conditions. It's understandable that, when determining whether the current wind speed and direction meet the ECD wind conditions, it could also be determined that the changes in wind speed and direction within the previous 10 seconds are not less than 15 m / s and 60° respectively. Alternatively, the values ​​of the current wind speed and direction can be summed to obtain the sum of wind speed and direction at the current moment, and then matched with the ECD wind condition curve. For example, if the sum of the current wind speed and direction is 88, and in the ECD wind condition curve, at the 20th second, the wind speed is 28 m / s and the wind direction is 60°, with a sum of 88, which is the same as the sum of the current wind speed and direction, then the current wind speed and direction are considered to meet the ECD wind conditions.

[0070] If the current wind speed and direction meet the preset wind conditions, such as ECD wind conditions, the current wind speed and direction are further compared with preset wind speed thresholds and wind direction thresholds, respectively. These preset wind speed and wind direction thresholds can be determined based on the limits of different wind turbine units. If the current wind speed is greater than the preset wind speed threshold and the current wind direction is greater than the preset wind direction threshold, it is determined that the current wind conditions may affect the operation of the wind turbine unit. In this case, the output torque of the wind turbine unit is reduced, controlling the wind turbine unit to output a target torque lower than the preset output torque. For example, the target torque can be 50% or 75% of the preset output torque. It is understandable that the output torque control of the wind turbine unit is usually achieved by controlling the pitch angle of the wind turbine unit, which is typically achieved through pitch PI control. For example, if monitoring of the current wind speed and direction determines that the current wind conditions meet preset wind conditions but exceed wind speed and direction limits, and the output torque needs to be reduced to 75% of the preset output torque, then the target torque, i.e., 75% of the preset output torque, is used as the output target of the preset PI algorithm. The pitch angle of the wind turbine is adjusted according to the preset PI algorithm, thereby controlling the output torque of the wind turbine. The PI algorithm and pitch PI control process are existing technologies and are not limited here. Taking a 10MW wind turbine as an example... Figures 3-6 As shown, the curves showing the changes in power, pitch angle, output torque, and yaw load of the wind turbine are respectively displayed when the output torque or output power of the wind turbine is not limited, is limited by 75%, and is limited by 50%.

[0071] To ensure the normal output of the wind turbine, in this embodiment, after controlling the output torque of the wind turbine to the target torque, the method further includes: continuously acquiring the ambient wind speed and wind direction of the wind turbine until the acquired wind speed is not greater than a wind speed threshold and / or the acquired wind direction is not greater than a wind direction threshold, and controlling the output torque of the wind turbine to the preset output torque. In this embodiment, after adjusting the output torque of the wind turbine, the real-time wind speed and wind direction are continuously monitored. If the acquired real-time wind speed is not greater than a wind speed threshold, or the real-time wind direction is not greater than a wind direction threshold, it is considered that the current wind conditions will not affect the wind turbine. In order to reduce the impact on the normal output of the wind turbine, the preset output torque is used as the output torque of the wind turbine, and the pitch angle of the wind turbine is adjusted by pitch control (PI control) to control the wind turbine to output at the preset output torque; or, if the acquired real-time wind speed is not greater than a wind speed threshold and the real-time wind direction is not greater than a wind direction threshold, the wind turbine is controlled to output at the preset output torque. By monitoring the ambient wind speed and direction in real time, the output torque of the wind turbine can be dynamically controlled according to the wind conditions, thereby effectively reducing the load on the wind turbine and extending its service life.

[0072] In a specific example of this embodiment, the wind speed threshold includes a first wind speed threshold and a second wind speed threshold, wherein the first wind speed threshold is less than the second wind speed threshold; the wind direction threshold includes a first wind direction threshold and a second wind direction threshold, wherein the first wind direction threshold is less than the second wind direction threshold; if the wind speed is greater than the wind speed threshold and the wind direction is greater than the wind direction threshold, controlling the output torque of the wind turbine to be the target torque includes:

[0073] If the wind speed is greater than the first wind speed threshold but less than the second wind speed threshold, and the wind direction is greater than the first wind direction threshold but less than the second wind direction threshold, the output torque of the wind turbine is controlled to be the first target torque; if the wind speed is greater than the second wind speed threshold, and the wind direction is greater than the second wind direction threshold, the output torque of the wind turbine is controlled to be the second target torque; the first target torque is greater than the second target torque, and the first target torque is less than the preset output torque.

[0074] To further refine the control of the wind turbine's output torque and reduce the load on the turbine while minimizing the impact of reduced output torque on its normal output, this embodiment adjusts the wind turbine's output torque based on different limit ranges for the current wind speed and direction. For example, setting the first wind speed threshold to 25 m / s, the second wind speed threshold to 30 m / s, the first wind direction threshold to 60°, and the second wind direction threshold to 70°, then if the current wind speed is 26 m / s and the wind direction is 65°, the current wind speed is greater than the first wind speed threshold but less than the second wind speed threshold, and the current wind direction is greater than the first wind direction threshold but less than the second wind direction threshold. In this case, the wind turbine's output torque is controlled at 75% of the preset output torque. If the current wind speed is 32 m / s and the wind direction is 75°, the current wind speed is greater than the second wind speed threshold and the current wind direction is greater than the second wind direction threshold. In this case, the wind turbine's output torque is further reduced, controlling it to 50% of the preset output torque. Understandably, the division of wind speed and wind direction thresholds includes, but is not limited to, the methods described above. For example, wind speed and wind direction thresholds can be further divided into three levels as needed. For instance, the wind speed threshold may also include a third wind speed threshold, which is greater than the second wind speed threshold. This is not limited here. Similarly, the method for controlling the output torque of the wind turbine is not limited to the methods described above. For example, if the current wind speed is greater than the first wind speed threshold and less than the second wind speed threshold, or the current wind direction is greater than the first wind direction threshold and less than the second wind direction threshold, then the output torque of the wind turbine is controlled to be 75% of the preset output torque; if the current wind speed is greater than the second wind speed threshold, or the current wind direction is greater than the second wind direction threshold, then the output torque of the wind turbine is controlled to be 50% of the preset output torque.

[0075] like Figure 7 As shown, a second aspect of this application provides a wind turbine load control device, comprising:

[0076] The data acquisition module is configured to acquire the ambient wind speed and direction of the wind turbine in real time.

[0077] The output torque control module is configured to match the wind speed and wind direction with preset wind speed thresholds and preset wind direction thresholds, respectively, when it is determined that the wind speed and wind direction meet preset wind conditions.

[0078] If the wind speed is greater than the wind speed threshold and the wind direction is greater than the wind direction threshold, the output torque of the wind turbine is controlled to be the target torque, which is lower than the preset output torque of the wind turbine.

[0079] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0080] A third aspect of this application provides a computer-readable medium storing a computer program that, when executed by a processor, implements the aforementioned wind turbine load control method.

[0081] The fourth aspect of this application provides a terminal device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the above-described wind turbine load control method.

[0082] like Figure 8 The diagram shown is a schematic representation of a terminal device provided in an embodiment of this application. Figure 8 As shown, the terminal device 10 of this embodiment includes a processor 100, a memory 101, and a computer program 102 stored in the memory 101 and executable on the processor 100. When the processor 100 executes the computer program 102, it implements the steps in the above method embodiments. Alternatively, when the processor 100 executes the computer program 102, it implements the functions of each module / unit in the above device embodiments.

[0083] For example, computer program 102 can be divided into one or more modules / units, one or more of which are stored in memory 101 and executed by processor 100 to complete this application. One or more modules / units can be a series of computer program instruction segments capable of performing specific functions, which describe the execution process of computer program 102 in terminal device 10. For example, computer program 102 can be divided into a data acquisition module and an output torque control module.

[0084] Terminal device 10 can be a desktop computer, laptop, handheld computer, cloud server, or other computing device. Terminal device 10 may include, but is not limited to, processor 100 and memory 101. Those skilled in the art will understand that... Figure 8 This is merely an example of terminal device 10 and does not constitute a limitation on terminal device 10. It may include more or fewer components than shown, or combine certain components, or different components. For example, terminal device may also include input / output devices, network access devices, buses, etc.

[0085] The processor 100 can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor.

[0086] The memory 101 can be an internal storage unit of the terminal device 10, such as a hard disk or RAM of the terminal device 10. The memory 101 can also be an external storage device of the terminal device 10, such as a plug-in hard disk, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card equipped on the terminal device 10. Furthermore, the memory 101 can include both internal and external storage units of the terminal device 10. The memory 101 is used to store computer programs and other programs and data required by the terminal device 10. The memory 101 can also be used to temporarily store data that has been output or will be output.

[0087] In summary, increased wind speed leads to increased rotor speed, increased turbine thrust, and greater component load. At the same time, rapid changes in wind direction will cause drastic changes in the unbalanced load of the turbine, which may seriously affect the lifespan of the turbine. This application can dynamically adjust the output torque of the wind turbine based on real-time wind speed and direction, thereby effectively reducing the turbine load and the cost of turbine components.

[0088] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0089] It should also be noted that 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 process, method, article, or apparatus. Unless otherwise specified, 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 that element.

[0090] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A load control method for a wind turbine generator set, characterized in that, include: Real-time acquisition of ambient wind speed and direction; If the wind speed and wind direction meet the preset wind conditions, the wind speed and wind direction are matched with preset wind speed thresholds and preset wind direction thresholds, respectively. If the wind speed is greater than the wind speed threshold and the wind direction is greater than the wind direction threshold, the output torque of the wind turbine is controlled to be the target torque, and the target torque is lower than the preset output torque of the wind turbine. The wind speed threshold includes a first wind speed threshold and a second wind speed threshold, wherein the first wind speed threshold is less than the second wind speed threshold. The wind direction threshold includes a first wind direction threshold and a second wind direction threshold, wherein the first wind direction threshold is less than the second wind direction threshold. If the wind speed is greater than the wind speed threshold and the wind direction is greater than the wind direction threshold, controlling the output torque of the wind turbine to the target torque includes: If the wind speed is greater than the first wind speed threshold and less than the second wind speed threshold, and the wind direction is greater than the first wind direction threshold and less than the second wind direction threshold, the output torque of the wind turbine is controlled to be the first target torque; If the wind speed is greater than the second wind speed threshold and the wind direction is greater than the second wind direction threshold, the output torque of the wind turbine is controlled to be the second target torque; The first target torque is greater than the second target torque, and the first target torque is less than the preset output torque.

2. The wind turbine load control method according to claim 1, characterized in that, After controlling the output torque of the wind turbine to the target torque, the method further includes: The system continuously acquires ambient wind speed and direction until the acquired wind speed is no greater than the wind speed threshold and / or the acquired wind direction is no greater than the wind direction threshold, and controls the output torque of the wind turbine to the preset output torque.

3. The wind turbine load control method according to claim 1, characterized in that, The steps for determining whether the wind speed and wind direction meet the preset wind conditions include: Get the historical wind speed and historical wind direction for n consecutive historical moments before the current moment; Determine the wind speed difference between the stated wind speed and each historical wind speed, and determine the wind direction difference between the stated wind direction and each historical wind direction; If there is a wind speed difference greater than a preset wind speed difference threshold, and a wind direction difference greater than a preset wind direction difference threshold, then the wind speed and the wind direction are determined to meet the preset wind conditions.

4. The wind turbine load control method according to claim 1, characterized in that, The steps for determining whether the wind speed and wind direction meet the preset wind conditions include: Get the historical wind speed and historical wind direction for n consecutive historical moments before the current moment; Determine the average wind speed for all historical wind speeds, and the average wind direction for all historical wind directions; Determine the wind speed difference between the wind speed and the average wind speed, and determine the wind direction difference between the wind direction and the average wind direction; The wind speed difference is matched with a preset wind speed difference threshold, and the wind direction difference is matched with a preset wind direction difference threshold difference. If the wind speed difference is greater than the wind speed difference threshold and the wind direction difference is greater than the wind direction difference threshold, then the wind speed and the wind direction are determined to meet the preset wind conditions.

5. The wind turbine load control method according to claim 1, characterized in that, The steps for determining whether the wind speed and wind direction meet the preset wind conditions include: The wind speed and wind direction are matched with a preset wind condition table or a preset wind condition curve. If the wind speed and wind direction can match the wind condition table or wind condition curve, it is determined that the wind speed and wind direction meet the preset wind conditions. The wind condition table or the wind condition curve shall at least include the mapping relationship between different wind speeds and corresponding wind directions that satisfy the preset wind conditions.

6. The wind turbine load control method according to claim 4, characterized in that, The preset wind conditions are ECD wind conditions, the preset wind condition table is an ECD wind condition table, and the preset wind condition curve is an ECD wind condition curve; The ECD wind condition table or the ECD wind condition curve shall at least include the mapping relationship between different wind speeds and corresponding wind directions that satisfy the ECD wind condition.

7. A wind turbine load control device, characterized in that, include: The data acquisition module is configured to acquire the ambient wind speed and direction in real time. The output torque control module is configured to match the wind speed and wind direction with preset wind speed thresholds and preset wind direction thresholds, respectively, when it is determined that the wind speed and wind direction meet preset wind conditions. If the wind speed is greater than the wind speed threshold and the wind direction is greater than the wind direction threshold, the output torque of the wind turbine is controlled to be the target torque, and the target torque is lower than the preset output torque of the wind turbine. The wind speed threshold includes a first wind speed threshold and a second wind speed threshold, wherein the first wind speed threshold is less than the second wind speed threshold. The wind direction threshold includes a first wind direction threshold and a second wind direction threshold, wherein the first wind direction threshold is less than the second wind direction threshold. If the wind speed is greater than the wind speed threshold and the wind direction is greater than the wind direction threshold, controlling the output torque of the wind turbine to the target torque includes: If the wind speed is greater than the first wind speed threshold and less than the second wind speed threshold, and the wind direction is greater than the first wind direction threshold and less than the second wind direction threshold, the output torque of the wind turbine is controlled to be the first target torque; If the wind speed is greater than the second wind speed threshold and the wind direction is greater than the second wind direction threshold, the output torque of the wind turbine is controlled to be the second target torque; The first target torque is greater than the second target torque, and the first target torque is less than the preset output torque.

8. A computer-readable medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the wind turbine load control method according to any one of claims 1 to 6.

9. A terminal device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the wind turbine load control method according to any one of claims 1 to 6.

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