Method, device and readable storage medium for determining absolute wind direction of wind turbine generator

Abstract

The embodiment of the application provides a kind of wind turbine absolute wind direction determination method, device and readable storage medium, belong to wind turbine control technical field.Wind turbine absolute wind direction is used for wind farm sector management, wind turbine absolute wind direction determination method includes: obtaining the cabin deviation angle of wind turbine, and obtaining the operation data of wind turbine in a period of operation time;Based on the operation data, determine the wind-ward deviation angle of wind turbine;Based on the wind-ward deviation angle and the cabin deviation angle, determine the absolute wind direction of wind turbine.The application can accurately calculate the absolute wind direction of wind turbine, ensure the accurate control of sector management, effectively reduce the fatigue load of wind turbine, improve the service life of wind turbine, improve the operation safety performance of wind turbine.

Description

Technical Field

[0001] This invention relates to the field of wind turbine control technology, specifically to a method for determining the absolute wind direction of a wind turbine, a device for determining the absolute wind direction of a wind turbine, and a readable storage medium. Background Technology

[0002] Currently, the construction of large-scale wind farms and mountain wind farms is gradually increasing. Due to the wake superposition effect of large-scale wind farms and the complex terrain of mountainous areas, higher requirements are being placed on the safe operation of wind turbines in these farms. Currently, sector management technology for wind turbines is commonly used to reduce the damage to wind turbines caused by special wind conditions in a specific wind direction (wind speed range), reduce the load on the turbines, and ensure their safe operation. One crucial step is obtaining the absolute wind direction of the wind turbines to determine whether they should be placed within a sector for management.

[0003] Existing technologies measure the absolute wind direction of wind turbines using GPS combined with wind energy forecasting software or wind energy resource assessment software. However, due to factors such as electrical measurement errors, system response delays, wake superposition effects, and complex mountainous terrain, the measured absolute wind direction of wind turbines is not accurate enough. This will greatly affect the actual effect of sector management and wind farm control, and may even bring additional loads to wind turbines, affecting the operational safety of the units. Summary of the Invention

[0004] The purpose of this invention is to provide a method, device, and readable storage medium for determining the absolute wind direction of a wind turbine, so as to at least solve the problem that the measured absolute wind direction of the wind turbine is not accurate due to the influence of factors such as electrical measurement errors, system response delays, wake superposition effects, and complex mountainous terrain. This will greatly affect the actual effect of sector management and wind farm control, and may even bring additional loads to the wind turbine and affect the safe operation of the unit.

[0005] To achieve the above objectives, a first aspect of the present invention provides a method for determining the absolute wind direction of a wind turbine generator, wherein the absolute wind direction of the wind turbine generator is used for wind farm sector management, the method comprising:

[0006] To obtain the nacelle deviation angle of the wind turbine, and to obtain the operating data of the wind turbine over a period of time;

[0007] Based on the aforementioned operational data, the wind turbine's windward deviation angle is determined;

[0008] The absolute wind direction of the wind turbine is determined based on the wind deviation angle and the nacelle deviation angle.

[0009] Optionally, the wind turbine operating data includes wind speed, wind direction, and power generation.

[0010] Based on the aforementioned operational data, the wind turbine's windward deviation angle is determined, including:

[0011] For each wind turbine:

[0012] Sort the wind speeds in ascending order;

[0013] Starting with the lowest wind speed, the wind speeds are grouped according to preset speed intervals to obtain multiple operating wind speed groups.

[0014] Based on the wind direction and power generation corresponding to all wind speeds in each operating wind speed group, the initial wind deviation angle of each operating wind speed group is obtained using a linear regression algorithm.

[0015] The wind turbine's wind deviation angle is determined based on the initial wind deviation angle corresponding to all operating wind speed groups.

[0016] Optionally, based on the initial windward deviation angles corresponding to all operating wind speed groups, the wind turbine's windward deviation angle is determined, including:

[0017] The wind turbine's deviation angle is calculated using the following formula:

[0018]

[0019] Where, α i α is the wind turbine's deviation angle from the wind; x The initial wind deviation angle corresponding to the operating wind speed group; x is the number of operating wind speed groups; μ i This represents the yaw system response delay coefficient.

[0020] Optionally, the method further includes:

[0021] An alarm is generated when the wind deviation angle is greater than or equal to a first preset threshold.

[0022] When the wind deviation angle is greater than or equal to the second preset threshold, the wind turbine unit is controlled to stop.

[0023] The first preset threshold is less than the second preset threshold.

[0024] Optionally, the cabin deviation angle is obtained through the following steps:

[0025] For each wind turbine:

[0026] During the yaw process of the wind turbine, the zero-degree position of the wind turbine nacelle is determined by using a compass set on the central axis of the wind turbine nacelle when the central axis of the nacelle coincides with the due north direction of the compass.

[0027] The angle between the compass north direction and the geographic north direction when the wind turbine is at the zero-degree position of the nacelle is taken as the nacelle deviation angle.

[0028] Optionally, the absolute wind direction of the wind turbine is determined based on the wind deviation angle and the nacelle deviation angle, including:

[0029] For each wind turbine:

[0030] The sum of the wind turbine's deviation angle from the wind and the nacelle's deviation angle is taken as the absolute wind direction of the wind turbine.

[0031] Optionally, the method further includes:

[0032] If the absolute wind direction of the wind turbine is within the first preset sector management range and remains within the first preset duration, then the turbine will be shut down or its operating power will be reduced to the first preset power.

[0033] If the absolute wind direction of the wind turbine changes from being within the second preset sector management zone to being outside the second preset sector management zone, and remains outside the second preset sector management zone for a second preset duration, then the turbine will be controlled to operate at the second preset power.

[0034] The first preset sector management interval is located within the second preset sector management interval.

[0035] A second aspect of the present invention provides a device for determining the absolute wind direction of a wind turbine generator, wherein the absolute wind direction of the wind turbine generator is used for wind farm sector management, the device comprising:

[0036] The data acquisition module is used to acquire the nacelle deviation angle of the wind turbine and the operating data of the wind turbine over a certain period of time.

[0037] The deviation angle determination module is used to determine the wind turbine's deviation angle based on the operating data.

[0038] The absolute wind direction determination module is used to determine the absolute wind direction of the wind turbine based on the wind deviation angle and the nacelle deviation angle.

[0039] Optionally, the device further includes:

[0040] The alarm module is used to generate an alarm when the wind deviation angle is greater than or equal to a first preset threshold.

[0041] The wind turbine control module is used to control the wind turbine to shut down when the wind deviation angle is greater than or equal to a second preset threshold.

[0042] The first preset threshold is less than the second preset threshold.

[0043] On the other hand, the present invention provides a readable storage medium storing instructions for causing a machine to perform the above-described method for determining the absolute wind direction of a wind turbine.

[0044] This technical solution obtains the nacelle deviation angle and determines the windward deviation angle based on the wind turbine's operating data. Then, based on the nacelle deviation angle and the windward deviation angle, it calculates the accurate absolute wind direction of the wind turbine, thereby ensuring precise control of sector management, effectively reducing the fatigue load on the wind turbine, increasing the service life of the wind turbine, and improving the operational safety performance of the wind turbine.

[0045] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0046] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0047] Figure 1 This is a flowchart of the method for determining the absolute wind direction of a wind turbine provided by the present invention;

[0048] Figure 2 This is a schematic diagram of the structure of the first wind turbine absolute wind direction determination device provided by the present invention;

[0049] Figure 3 This is a schematic diagram of the structure of the second type of wind turbine absolute wind direction determination device provided by the present invention.

[0050] Explanation of reference numerals in the attached figures

[0051] 10 - Data acquisition module; 20 - Deviation angle determination module;

[0052] 30 - Absolute wind direction determination module; 40 - Alarm module;

[0053] 50 - Fan control module. Detailed Implementation

[0054] The specific embodiments of the present invention 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 present invention.

[0055] Figure 1 This is a flowchart of the method for determining the absolute wind direction of a wind turbine provided by the present invention; Figure 2 This is a schematic diagram of the structure of the first wind turbine absolute wind direction determination device provided by the present invention; Figure 3This is a schematic diagram of the structure of the second type of wind turbine absolute wind direction determination device provided by the present invention.

[0056] like Figure 1 As shown, this invention provides a method for determining the absolute wind direction of a wind turbine, which is used for wind farm sector management. The method includes:

[0057] Step 1: Obtain the nacelle deviation angle of the wind turbine and the operating data of the wind turbine over a period of time.

[0058] Step 2: Based on the aforementioned operating data, determine the wind turbine's windward deviation angle;

[0059] Step 3: Determine the absolute wind direction of the wind turbine based on the wind deviation angle and the nacelle deviation angle.

[0060] Specifically, in existing technologies, the power generation of wind turbine generators can typically be calculated using the following formula:

[0061]

[0062] Where P is the power output of the wind turbine generator (unit: kW / h); ρ is the air density (unit: kg / m³). 3 A represents the swept area of ​​the wind turbine (unit: m²). 2 );C p V is the power factor of the wind turbine generator (theoretical value is 57.3%); V is the wind speed (unit: m / s); The windward angle (unit: degrees). Assuming identical air density, swept area of ​​the wind turbine, power factor of the wind turbine, and wind speed, and excluding power limitations on the wind turbine, changes in the windward angle will significantly impact the power generation of the wind turbine. When a wind turbine is perfectly aligned with the incoming wind direction, its power output is at its maximum. This also reduces the frequency of yaw system activations, lowering the turbine's own power consumption and thus ensuring its lifespan and operational safety. The absolute wind direction of a wind turbine refers to the direction of the wind it receives. Compared to wind direction measured solely by a wind direction sensor, this eliminates the influence of electrical measurement errors, system response delays, wake superposition effects, and complex terrain factors, resulting in greater accuracy. While the turbine's power output is at its maximum when perfectly aligned with the incoming wind direction, the load on its components is also relatively higher. To prevent prolonged high-load operation, the absolute wind direction is used to determine whether to enter sector management, thus adjusting the turbine's operating status. By acquiring the nacelle deviation angle and determining the windward deviation angle based on the turbine's operating data, the accurate absolute wind direction is calculated. This ensures precise sector management control, effectively reducing fatigue load on the turbine, extending its lifespan, and improving operational safety. In addition, wind turbine operating data can be directly read by the wind turbine's main control system, such as SCADA data.

[0063] Furthermore, the wind turbine operating data includes wind speed, wind direction, and power generation.

[0064] Based on the aforementioned operational data, the wind turbine's windward deviation angle is determined, including:

[0065] For each wind turbine:

[0066] Sort the wind speeds in ascending order;

[0067] Starting with the lowest wind speed, the wind speeds are grouped according to preset speed intervals to obtain multiple operating wind speed groups.

[0068] Based on the wind direction and power generation corresponding to all wind speeds in each operating wind speed group, the initial wind deviation angle of each operating wind speed group is obtained using a linear regression algorithm.

[0069] The wind turbine's wind deviation angle is determined based on the initial wind deviation angle corresponding to all operating wind speed groups.

[0070] Specifically, wind turbine data acquisition is typically performed at certain time intervals, such as 3-second or 5-second intervals. The wind turbine operating data for a certain operating time includes the wind speed, wind direction, and power generation during that operating time, as well as the corresponding data acquisition time. The wind speeds during the operating time are sorted in ascending order, and based on the lowest wind speed, the operating data is grouped according to a preset speed interval to obtain multiple operating wind speed groups. Based on the wind direction and power generation corresponding to all wind speeds in the operating wind speed group, a linear regression algorithm is used to fit and obtain the initial wind deviation angle of each operating wind speed group. To reduce the amount of data calculation, the wind deviation angle of the wind turbine is calculated based on the initial wind deviation angles corresponding to all operating wind speed groups.

[0071] More specifically, within one minute of operation of a wind turbine, data is collected every 5 seconds. Within this minute, wind speed, wind direction, and power generation can be obtained at 12 different times. The wind speeds at these 12 times are: 3.1 m / s, 3.2 m / s, 3.1 m / s, 3.3 m / s, 3.6 m / s, 3.4 m / s, 3.0 m / s, 3.3 m / s, 2.9 m / s, and 3.4 m / s. Following the aforementioned wind speed group division scheme, starting from the lowest wind speed of 2.9 m / s, according to the pre-set... The wind speed interval is set at 0.2 m / s, resulting in four operating wind speed groups. The first group includes: 2.9 m / s, 3.0 m / s, 3.1 m / s, and 3.1 m / s; the second group includes: 3.1 m / s, 3.1 m / s, 3.2 m / s, 3.3 m / s, and 3.3 m / s; the third group includes: 3.3 m / s, 3.3 m / s, 3.4 m / s, and 3.4 m / s; and the fourth group includes: 3.4 m / s, 3.4 m / s, and 3.6 m / s. This division method is simple, reduces data processing, and allows for some overlap between adjacent wind speed groups, increasing the number of data points for fitting and thus improving the accuracy of the fitting results.

[0072] More specifically, based on the wind direction and power generation corresponding to all wind speeds in each operating wind speed group, the initial wind deviation angle of each operating wind speed group is obtained using a linear regression algorithm, employing the following steps:

[0073] Median regression was used for data regression, employing a parabola as the model structure to fit the data within each operating wind speed group. Under normal circumstances, the parabola opens downwards, and the initial wind deviation angle corresponding to the maximum power generation is the smallest. However, in cases where angular deviation exists, the angular deviation corresponding to the maximum value of the fitted curve for each operating wind speed group is taken as the initial wind deviation angle for that group. Linear regression, on the other hand, offers faster computation and yields results more quickly, providing a more accurate initial wind deviation angle for each operating wind speed group.

[0074] Furthermore, based on the initial windward deviation angles corresponding to all operating wind speed groups, the windward deviation angle of the wind turbine is determined, including:

[0075] The wind turbine's deviation angle is calculated using the following formula:

[0076]

[0077] Where, α i α is the wind turbine's deviation angle from the wind; x The initial wind deviation angle corresponding to the operating wind speed group; x is the number of operating wind speed groups; μ i This represents the yaw system response delay coefficient.

[0078] In this embodiment, after calculating the initial windward deviation angles corresponding to all operating wind speed groups using the method described above, the average value of the initial windward deviation angles corresponding to all operating wind speed groups is taken as the windward deviation angle of the wind turbine, as shown in the calculation formula, where μ i The yaw system response delay coefficient is determined by experience or historical data of the wind turbine. In this embodiment, the yaw system response delay coefficient can be specifically set to 0.95-1.15. Different wind turbines have different yaw system response delay coefficients. By correcting the results with the yaw system response delay coefficient, the calculated value of the wind turbine's wind deviation angle is further improved, thereby ensuring the accuracy of the absolute wind direction, realizing precise control of sector management, effectively reducing the fatigue load of the wind turbine, improving the service life of the wind turbine, and improving the operational safety performance of the wind turbine.

[0079] Furthermore, the method also includes:

[0080] An alarm is generated when the wind deviation angle is greater than or equal to a first preset threshold.

[0081] When the wind deviation angle is greater than or equal to the second preset threshold, the wind turbine unit is controlled to stop.

[0082] The first preset threshold is less than the second preset threshold.

[0083] Specifically, in this embodiment, when the calculated wind deviation angle is less than a certain value, it indicates that the wind turbine's deviation is small, and its impact on the wind turbine's operation (power, turbine safety, service life, etc.) is relatively minor. When the calculated wind deviation angle is greater than or equal to a first preset threshold, an alarm is generated. Specifically, the alarm signal generated can be transmitted from the wind turbine's ring network to the monitoring room through the main control system to remind maintenance personnel to perform maintenance and correction on the wind turbine. When the wind deviation angle is greater than or equal to a second preset threshold, the wind turbine is shut down. The first preset threshold is less than the second preset threshold. Using this method, timely reminders can be issued when the wind turbine's wind deviation differs significantly from the corresponding threshold, allowing for timely maintenance to ensure the accuracy of wind turbine control and improve the wind turbine's service life and operational safety.

[0084] Furthermore, the cabin deviation angle is obtained through the following steps:

[0085] For each wind turbine:

[0086] During the yaw process of the wind turbine, the zero-degree position of the wind turbine nacelle is determined by using a compass set on the central axis of the wind turbine nacelle when the central axis of the nacelle coincides with the due north direction of the compass.

[0087] The angle between the compass north direction and the geographic north direction when the wind turbine is at the zero-degree position of the nacelle is taken as the nacelle deviation angle.

[0088] Strictly speaking, the direction a compass points to is not geographically true south or true north. It typically forms an angle with geographical south and true north, known as magnetic declination. Furthermore, the magnitude of magnetic declination varies depending on latitude and longitude; generally, the higher the latitude, the greater the magnetic declination. Therefore, the nacelle deviation angle of wind turbines varies depending on their geographical location.

[0089] Specifically, in this embodiment, the central axis of the wind turbine nacelle is the central axis along the length of the nacelle. Furthermore, the compass is positioned on the outer side of the nacelle top to reduce electromagnetic interference inside the nacelle, which would lead to inaccurate results. Therefore, measurements are taken outside the nacelle. Additionally, the compass can be fixed using specialized fixtures, such as adhesive bonding, to the outside of the nacelle.

[0090] The yaw process of a wind turbine can be adjusted manually via controlled yaw or automatically. As the turbine yaws, the nacelle's centerline aligns with true north on a compass, at which point yaw stops (at this point, the turbine's saddle-arc cable is in the forward cable position). This position is designated as the nacelle's zero-degree position. The angle between true north (the nacelle's centerline along its length) and geographic true north is taken as the nacelle deviation angle. This method yields a more accurate nacelle deviation angle, ensuring the accuracy of subsequent calculations of the absolute wind direction.

[0091] Further, based on the wind deviation angle and the nacelle deviation angle, the absolute wind direction of the wind turbine is determined, including:

[0092] For each wind turbine:

[0093] The sum of the wind turbine's deviation angle from the wind and the nacelle's deviation angle is taken as the absolute wind direction of the wind turbine.

[0094] Specifically, in this embodiment, the calculated windward deviation angle of the wind turbine is added to the nacelle deviation angle of the wind turbine to obtain the absolute wind direction of the wind turbine. Using this method, the calculated absolute wind direction of the wind turbine is more accurate, which can ensure precise control of sector management, effectively reduce the fatigue load of the wind turbine, improve the service life of the wind turbine, and improve the operational safety performance of the wind turbine.

[0095] Furthermore, the method also includes:

[0096] If the absolute wind direction of the wind turbine is within the first preset sector management range and remains within the first preset duration, then the turbine will be shut down or its operating power will be reduced to the first preset power.

[0097] If the absolute wind direction of the wind turbine changes from being within the second preset sector management zone to being outside the second preset sector management zone, and remains outside the second preset sector management zone for a second preset duration, then the turbine will be controlled to operate at the second preset power.

[0098] The first preset sector management interval is located within the second preset sector management interval.

[0099] In this embodiment, when the absolute wind direction of the wind turbine enters the range of the first preset sector management zone, and the turbine remains within the first preset sector management zone for a first preset duration from the moment it enters the first preset sector management zone, the turbine will run for a long time, which will lead to excessive load and certain safety hazards. Therefore, it is determined that the wind turbine has entered the sector management mode, and the turbine is controlled to shut down or the operating power of the turbine is reduced to the first preset power to ensure the service life of the turbine and reduce the operating risk of the wind turbine. Similarly, when a wind turbine is under sector management, if the turbine is shut down or its operating power is reduced to the first preset power, and after a certain period of time, the absolute wind direction of the wind turbine changes from being within the second preset sector management zone to not being within the second preset sector management zone, and since the last time it left the second preset sector management zone, it has not re-entered the second preset sector management zone for a continuous second preset time, then the wind turbine is determined to have exited sector management, and the control unit operates at the second preset power. Furthermore, when exiting sector control, to restart the control unit, it is necessary to determine whether other operating conditions are met. The conditions for determining these conditions when the wind turbine starts operating include, for example, wind speed reaching the corresponding set value and no abnormalities in the unit, which are conventional techniques known to those skilled in the art and will not be elaborated here. The first preset power is the lower operating power of the wind turbine, and the second preset power can be the initial set operating power of the wind turbine. The first and second preset time periods can be set to the same time, such as 10 seconds, or they can be set separately according to actual conditions.

[0100] More specifically, to avoid frequent entry and exit from sector control by wind turbine units, the range of the first preset sector management interval is set to be within the range of the second preset sector management interval. This makes the conditions for entering sector control more stringent than the conditions for exiting sector control, ensuring the accuracy of sector control and improving the service life of the unit. For example, the range of the first preset sector management interval is interval X+2, and the range of the second preset sector management interval is set to interval X+4.

[0101] like Figure 2 As shown, this invention provides a device for determining the absolute wind direction of a wind turbine generator. The absolute wind direction of the wind turbine generator is used for wind farm sector management. The device includes:

[0102] The data acquisition module 10 is used to acquire the nacelle deviation angle of the wind turbine and the operating data of the wind turbine over a period of time.

[0103] The deviation angle determination module 20 is used to determine the wind deviation angle of the wind turbine based on the operating data.

[0104] The absolute wind direction determination module 30 is used to determine the absolute wind direction of the wind turbine based on the wind deviation angle and the nacelle deviation angle.

[0105] Furthermore, the wind turbine operating data includes wind speed, wind direction, and power generation.

[0106] The deviation angle determination module 20 is specifically used for:

[0107] For each wind turbine:

[0108] Sort the wind speeds in ascending order;

[0109] Starting with the lowest wind speed, the wind speeds are grouped according to preset speed intervals to obtain multiple operating wind speed groups.

[0110] Based on the wind direction and power generation corresponding to all wind speeds in each operating wind speed group, the initial wind deviation angle of each operating wind speed group is obtained using a linear regression algorithm.

[0111] The wind turbine's wind deviation angle is determined based on the initial wind deviation angle corresponding to all operating wind speed groups.

[0112] like Figure 3 As shown, the device further includes:

[0113] Alarm module 40 is used to generate an alarm when the wind deviation angle is greater than or equal to a first preset threshold.

[0114] The wind turbine control module 50 is used to control the wind turbine to stop when the wind deviation angle is greater than or equal to the second preset threshold.

[0115] The first preset threshold is less than the second preset threshold.

[0116] Furthermore, based on the initial windward deviation angles corresponding to all operating wind speed groups, the windward deviation angle of the wind turbine is determined, including:

[0117] The wind turbine's deviation angle is calculated using the following formula:

[0118]

[0119] Where, α i α is the wind turbine's deviation angle from the wind; x The initial wind deviation angle corresponding to the operating wind speed group; x is the number of operating wind speed groups; μ i This represents the yaw system response delay coefficient.

[0120] Furthermore, the method also includes:

[0121] An alarm is generated when the wind deviation angle is greater than or equal to a first preset threshold.

[0122] When the wind deviation angle is greater than or equal to the second preset threshold, the wind turbine unit is controlled to stop.

[0123] The first preset threshold is less than the second preset threshold.

[0124] Furthermore, the cabin deviation angle is obtained through the following steps:

[0125] For each wind turbine:

[0126] During the yaw process of the wind turbine, the zero-degree position of the wind turbine nacelle is determined by using a compass set on the central axis of the wind turbine nacelle when the central axis of the nacelle coincides with the due north direction of the compass.

[0127] The angle between the compass north direction and the geographic north direction when the wind turbine is at the zero-degree position of the nacelle is taken as the nacelle deviation angle.

[0128] Furthermore, the absolute wind direction determination module 30 is specifically used for:

[0129] For each wind turbine:

[0130] The sum of the wind turbine's deviation angle from the wind and the nacelle's deviation angle is taken as the absolute wind direction of the wind turbine.

[0131] Furthermore, the fan control module 50 is also used for:

[0132] If the absolute wind direction of the wind turbine is within the first preset sector management range and continues for a first preset time, then the turbine will be shut down or its operating power will be reduced to the first preset power.

[0133] If the absolute wind direction of the wind turbine changes from being within the second preset sector management zone to not being within the second preset sector management zone, and this continues for a second preset duration, then the turbine will be controlled to operate at the second preset power.

[0134] The first preset sector management interval is located within the second preset sector management interval.

[0135] This invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the above-described method for determining the absolute wind direction of a wind turbine.

[0136] This invention provides a readable storage medium storing instructions that cause a machine to execute the above-described method for determining the absolute wind direction of a wind turbine.

[0137] Those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. This program is stored in a storage medium and includes several instructions to cause a microcontroller, chip, or processor to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0138] The optional embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details described above. Within the scope of the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all fall within the protection scope of the embodiments of the present invention. It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not further describe the various possible combinations.

[0139] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the embodiments of the present invention, they should also be regarded as the content disclosed by the embodiments of the present invention.

Claims

1. A method for determining the absolute wind direction of a wind turbine generator, wherein the absolute wind direction of the wind turbine generator is used for wind farm sector management, characterized in that, The method includes: The nacelle deviation angle of the wind turbine is obtained, as well as the operating data of the wind turbine over a period of time, including wind speed, wind direction and power generation. Based on the aforementioned operational data, the wind turbine's windward deviation angle is determined, including: For each wind turbine: Sort the wind speeds in ascending order; Starting with the lowest wind speed, the wind speeds are grouped according to a preset speed interval to obtain multiple operating wind speed groups, with data overlap between adjacent operating wind speed groups; Based on the wind direction and power generation corresponding to all wind speeds in each operating wind speed group, the initial wind deviation angle of each operating wind speed group is obtained using a linear regression algorithm. The wind turbine's wind deviation angle is determined based on the initial wind deviation angle corresponding to all operating wind speed groups. The absolute wind direction of the wind turbine is determined based on the wind deviation angle and the nacelle deviation angle. The method further includes: If the absolute wind direction of the wind turbine is within the first preset sector management range and remains within the first preset duration, then the turbine will be shut down or its operating power will be reduced to the first preset power. If the absolute wind direction of the wind turbine changes from being within the second preset sector management zone to being outside the second preset sector management zone, and remains outside the second preset sector management zone for a second preset duration, then the turbine will be controlled to operate at the second preset power. The first preset sector management interval is located within the second preset sector management interval.

2. The method for determining the absolute wind direction of a wind turbine according to claim 1, characterized in that, Based on the initial windward deviation angles corresponding to all operating wind speed groups, the windward deviation angle of the wind turbine is determined, including: The wind turbine's deviation angle is calculated using the following formula: in, This refers to the wind turbine's deviation angle from the wind. This is the initial wind deviation angle corresponding to the operating wind speed group; The number of operating wind speed groups; This represents the yaw system response delay coefficient.

3. The method for determining the absolute wind direction of a wind turbine according to claim 1, characterized in that, The method further includes: An alarm is generated when the wind deviation angle is greater than or equal to a first preset threshold. When the wind deviation angle is greater than or equal to the second preset threshold, the wind turbine unit is controlled to stop. The first preset threshold is less than the second preset threshold.

4. The method for determining the absolute wind direction of a wind turbine according to claim 1, characterized in that, The cabin deviation angle is obtained through the following steps: For each wind turbine: During the yaw process of the wind turbine, the zero-degree position of the wind turbine nacelle is determined by using a compass set on the central axis of the wind turbine nacelle when the central axis of the nacelle coincides with the due north direction of the compass. The angle between the compass north direction and the geographic north direction when the wind turbine is at the zero-degree position of the nacelle is taken as the nacelle deviation angle.

5. The method for determining the absolute wind direction of a wind turbine according to claim 1, characterized in that, Based on the wind deviation angle and the nacelle deviation angle, the absolute wind direction of the wind turbine is determined, including: For each wind turbine: The sum of the wind turbine's deviation angle from the wind and the nacelle's deviation angle is taken as the absolute wind direction of the wind turbine.

6. A device for determining the absolute wind direction of a wind turbine generator, wherein the absolute wind direction of the wind turbine generator is used for wind farm sector management, characterized in that, The device includes: The data acquisition module is used to acquire the nacelle deviation angle of the wind turbine and the operating data of the wind turbine over a period of time. The operating data of the wind turbine includes wind speed, wind direction and power generation. The deviation angle determination module is used to determine the wind turbine's deviation angle based on the operating data, including: For each wind turbine: Sort the wind speeds in ascending order; Starting with the lowest wind speed, the wind speeds are grouped according to a preset speed interval to obtain multiple operating wind speed groups, with data overlap between adjacent operating wind speed groups; Based on the wind direction and power generation corresponding to all wind speeds in each operating wind speed group, the initial wind deviation angle of each operating wind speed group is obtained using a linear regression algorithm. The wind turbine's wind deviation angle is determined based on the initial wind deviation angle corresponding to all operating wind speed groups. The absolute wind direction determination module is used to determine the absolute wind direction of the wind turbine based on the wind deviation angle and the nacelle deviation angle. The fan control module is used for: If the absolute wind direction of the wind turbine is within the first preset sector management range and continues for a first preset duration, the turbine will be shut down or its operating power will be reduced to the first preset power. If the absolute wind direction of the wind turbine changes from being within the second preset sector management zone to not being within the second preset sector management zone, and this continues for the second preset duration, then the turbine will be controlled to operate at the second preset power. The first preset sector management interval is located within the second preset sector management interval.

7. The wind turbine absolute wind direction determination device according to claim 6, characterized in that, The device further includes: The alarm module is used to generate an alarm when the wind deviation angle is greater than or equal to a first preset threshold. The wind turbine control module is also used to control the wind turbine to stop when the wind deviation angle is greater than or equal to the second preset threshold. The first preset threshold is less than the second preset threshold.

8. A readable storage medium storing instructions for causing a machine to perform the method for determining the absolute wind direction of a wind turbine as described in any one of claims 1-5.

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