Wind turbine light and shadow control method, device, system and readable storage medium

Abstract

The application provides a wind turbine light shadow control method, device, system and readable storage medium. The wind turbine light shadow control method comprises detecting the light intensity of the position where the wind turbine of a wind farm is located; in the case that the light intensity reaches a preset light intensity, the current solar elevation angle and the current solar azimuth angle of the wind farm are obtained according to the universal time coordinated (UTC); it is determined whether the current solar elevation angle and the current solar azimuth angle reach the condition of generating light shadow effect; and in the case that the current solar elevation angle and the current solar azimuth angle reach the condition of generating light shadow effect, the wind turbine is controlled to stop. Thus, the range of land area light shadow control is improved.

Description

Technical Field

[0001] This invention relates to the field of wind turbine technology, and in particular to a method, apparatus, system, and readable storage medium for controlling the light and shadow of a wind turbine. Background Technology

[0002] The constantly rotating blades of wind turbines, when exposed to sunlight, cast flickering shadows on the windows of residential buildings. These persistent shadows can be quite bothersome and disturbing, a phenomenon commonly referred to as light and shadow effects. In severe cases, the light and shadow effects of wind turbines can even impact the health of nearby residents. Therefore, most wind turbine light and shadow control systems use the location of the wind turbine as the coordinate center, with the east-west axis as the axis, and the solar altitude angle as the determining factor for the range of light and shadow control. A higher solar altitude angle results in a shorter shadow, while a lower angle results in a longer shadow. Therefore, it is necessary to determine the angle of light and shadow effects.

[0003] In related technologies, satellite positioning systems are used to determine the location of wind turbines and thus the angle of light and shadow influence. However, the coverage of satellite positioning systems is affected by the environment of different land areas, which affects the positioning results. Furthermore, the angle of light and shadow influence varies in different land areas at different times, thus limiting the range of light and shadow control in land areas. Summary of the Invention

[0004] This application provides a method, apparatus, system, and readable storage medium for controlling the light and shadow of a wind turbine, the method improving the range of light and shadow control in terrestrial areas.

[0005] This application provides a method for controlling the light and shadow of a wind turbine generator, which may include:

[0006] Detect the light intensity at the location of the wind turbines in the wind farm;

[0007] When the light intensity is detected to have reached the preset light intensity, the current solar altitude angle and current solar azimuth angle of the wind farm are obtained according to Coordinated Universal Time (UTC).

[0008] Determine whether the current solar altitude angle and current solar azimuth angle meet the conditions for generating light and shadow effects; and,

[0009] If the current solar altitude angle and current solar azimuth angle meet the conditions for generating light and shadow effects, the wind turbine unit will be shut down.

[0010] Furthermore, determining whether the current solar altitude angle and current solar azimuth angle meet the conditions for generating light and shadow effects includes:

[0011] Compare the current solar altitude angle with the reference solar altitude angle;

[0012] Compare the current solar azimuth angle with the reference solar azimuth angle range;

[0013] If the current solar altitude angle is less than the reference solar altitude angle and the current solar azimuth angle is within the range of the reference solar azimuth angle, then the current solar altitude angle and the current solar azimuth angle are determined to meet the conditions for generating light and shadow effects.

[0014] Furthermore, comparing the current solar altitude angle with the reference solar altitude angle includes:

[0015] The current solar altitude angle is compared with multiple reference solar altitude angles;

[0016] The step of comparing the current solar azimuth with the reference solar azimuth range includes:

[0017] The current solar azimuth angle is compared with multiple reference solar azimuth angle ranges;

[0018] The step of determining that the current solar altitude angle and current solar azimuth angle meet the conditions for generating light and shadow effects when the current solar altitude angle is less than the reference solar altitude angle and the current solar azimuth angle is within the range of the reference solar azimuth angle includes:

[0019] When the current solar altitude angle is less than all of the reference solar altitude angles and the current solar azimuth angle is within the range of all of the reference solar azimuth angles, it is determined that the current solar altitude angle and the current solar azimuth angle meet the conditions for generating light and shadow effects.

[0020] Furthermore, the reference solar altitude angle is the maximum solar altitude angle on the winter solstice, and the reference solar azimuth angle range is the solar azimuth angle corresponding to the maximum solar altitude angle.

[0021] Furthermore, determining whether the current solar altitude angle and current solar azimuth angle meet the conditions for generating light and shadow effects includes:

[0022] Based on the UTC, the reference time corresponding to the UTC and the range of reference solar altitude angle and reference solar azimuth angle under the reference time are determined in the database. The database stores the range of reference solar altitude angle and reference solar azimuth angle under multiple reference times.

[0023] Furthermore, determining the reference time corresponding to the UTC in the database, as well as the range of the reference solar altitude angle and reference solar azimuth angle under the reference time, based on the UTC, includes:

[0024] Determine the current season based on the given UTC;

[0025] Based on the current season, determine the reference season corresponding to the current season in the database, as well as the range of reference solar altitude angle and reference solar azimuth angle under the reference season.

[0026] Furthermore, determining the reference time corresponding to the UTC in the database, as well as the range of the reference solar altitude angle and reference solar azimuth angle under the reference time, based on the UTC, includes:

[0027] Determine the current month based on the given UTC;

[0028] Based on the current month, determine the reference month corresponding to the current month in the database, as well as the range of the reference solar altitude angle and reference solar azimuth angle for the reference month.

[0029] Furthermore, the wind farm includes a first wind farm and a second wind farm located within the same predetermined area; the method further includes:

[0030] Obtain the latitude and longitude of the wind farm, wherein the latitude and longitude of any wind turbine in the first wind farm and the second wind farm are obtained as the latitude and longitude of the first wind farm and the second wind farm.

[0031] Furthermore, the detection of the light intensity at the location of the wind turbine generators in the wind farm includes:

[0032] The first light intensity received on the east side and the second light intensity received on the west side of the wind turbine are detected;

[0033] The step of obtaining the current solar altitude angle and current solar azimuth angle of the wind farm based on Coordinated Universal Time (UTC) when the light intensity is detected to reach a preset light intensity includes:

[0034] When the difference between the first light intensity and the second light intensity is within the normal range, and when the larger of the first light intensity and the second light intensity reaches the preset light intensity, the current solar altitude angle and the current solar azimuth angle of the wind farm are obtained according to Coordinated Universal Time (UTC).

[0035] This application provides a wind turbine light and shadow control device, comprising:

[0036] The detection module is used to detect the light intensity at the location of the wind turbines in the wind farm.

[0037] The acquisition module is used to acquire the current solar altitude angle and current solar azimuth angle of the wind farm according to Coordinated Universal Time (UTC) when the light intensity is detected to reach a preset light intensity.

[0038] The light and shadow determination module is used to determine whether the current solar altitude angle and the current solar azimuth angle meet the conditions for generating light and shadow effects;

[0039] The light and shadow control module is used to control the wind turbine to shut down when the current solar altitude angle and the current solar azimuth angle meet the conditions for generating light and shadow effects.

[0040] This application provides a wind turbine light and shadow control system, which may include one or more processors for implementing the method described in any of the preceding claims.

[0041] This application provides a computer-readable storage medium having a program stored thereon that, when executed by a processor, implements the method described in any of the preceding claims.

[0042] In some embodiments, the wind turbine light and shadow control method of this application obtains the current solar altitude angle and current solar azimuth angle of the wind farm based on UTC (Coordinated Universal Time). Using UTC in this way ensures time consistency, prevents external interference, and allows for a clear understanding of the duration of light and shadow effects. Furthermore, combining UTC time with the latitude and longitude of different land regions allows for the determination of light and shadow effects at different times in different land regions, thus expanding the scope of light and shadow control in land areas. Attached Figure Description

[0043] Figure 1 The diagram shown is a structural schematic of a wind turbine generator provided in an embodiment of this application.

[0044] Figure 2 The diagram shown is a schematic flowchart of the wind turbine light and shadow control method provided in an embodiment of this application;

[0045] Figure 3 The diagram shown is a simplified schematic of the wind turbine light and shadow control method provided in an embodiment of this application;

[0046] Figure 4 The diagram shown is a block diagram of the wind turbine light and shadow control device provided in an embodiment of this application.

[0047] Figure 5 The diagram shown is a block diagram of the wind turbine light and shadow control system provided in an embodiment of this application. Detailed Implementation

[0048] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with one or more embodiments of this specification. Rather, they are merely examples of apparatuses and methods consistent with some aspects of one or more embodiments of this specification as detailed in the appended claims.

[0049] It should be noted that the steps of the corresponding methods are not necessarily performed in the order shown and described in this specification in other embodiments. In some other embodiments, the methods may include, but are not limited to, more or fewer steps than those described in this specification. Furthermore, a single step described in this specification may be broken down into multiple steps in other embodiments; and multiple steps described in this specification may be combined into a single step in other embodiments.

[0050] To address the limited range of light and shadow control in land areas, this application provides a method for controlling the light and shadow of wind turbines. Based on UTC (Ultra-Time Computing), the current solar altitude angle and solar azimuth angle of the wind farm are obtained. Using UTC ensures consistent time, preventing external interference. Furthermore, UTC time clearly defines the duration of light and shadow effects. Combining UTC time with the latitude and longitude of different land areas allows for the determination of light and shadow effects at different times in different land areas, thereby improving the range of light and shadow control in land areas.

[0051] Figure 1 The diagram shown is a structural schematic of the wind turbine 10 provided in an embodiment of this application. Figure 1 As shown, the wind turbine 10 may include, but is not limited to, a tower 12 extending from a support surface 11, a nacelle 13 mounted on the tower 12, and a wind rotor 14 assembled to the nacelle 13. The wind rotor 14 may include, but is not limited to, a rotatable hub 15 and at least one blade 16, the blade 16 being connected to the hub 15 and extending outward from the hub 15. Figure 1 In the illustrated embodiment, the wind turbine 14 may include, but is not limited to, three blades 16. In some other embodiments, the wind turbine 14 may include, but is not limited to, more or fewer blades 16. Multiple blades 16 may be spaced around the hub 15 to facilitate rotation of the wind turbine 14 so that wind energy can be converted into usable mechanical energy, and subsequently into electrical energy.

[0052] Figure 2 The diagram shown is a schematic flowchart of the wind turbine light and shadow control method provided in an embodiment of this application.

[0053] like Figure 2As shown, the wind turbine light and shadow control method may include, but is not limited to, the following steps 110 to 140:

[0054] Step 110: Detect the light intensity at the location of the wind turbines in the wind farm.

[0055] The wind farm may include, but is not limited to, a first wind farm and a second wind farm located within the same predetermined area. The method may further include obtaining the latitude and longitude of the wind farm, and obtaining the latitude and longitude of any wind turbine in the first and second wind farms as the latitude and longitude of the first and second wind farms. This avoids measuring many wind turbines in many wind farms, saving costs. For example, a wind farm may include, but is not limited to, 40 or fewer wind turbines. The latitude and longitude of any wind turbine represents the latitude and longitude of the wind farm. For example, a wind farm may include 20 wind turbines. Or, for example, a wind farm may include 30 wind turbines.

[0056] The light intensity is used to reflect whether the current weather at the wind turbine generators in the wind farm is sunny or whether it is daytime. If the light intensity reaches a preset level, it indicates that the current weather is sunny. If the light intensity does not reach the preset level, it indicates that the current weather is not sunny (e.g., it may be cloudy) or that it is not daytime (e.g., it may be evening, dusk, or dawn). Therefore, when the light intensity is weak or it is nighttime, there are no conditions for light and shadow effects, and thus no adjustment to the rotational speed and deflection of the wind turbine generator 10's rotor 14 is necessary. The preset light intensity can be set according to user requirements.

[0057] The aforementioned light intensity can be obtained by measuring a light intensity detection device. There can be one light intensity detection device. There can be two or more light intensity detection devices.

[0058] Step 120: When the light intensity is detected to reach the preset light intensity, the current solar altitude angle and current solar azimuth angle of the wind farm are obtained according to UTC.

[0059] UTC is Coordinated Universal Time, a time measurement system based on the atomic second, designed to be as close as possible to Universal Time in terms of time. An example of UTC is xx year xx month xx day xx hour xx minute xx second.

[0060] The current solar azimuth angle refers to the azimuth angle of the sun at the current moment. The current solar altitude angle refers to the altitude angle of the sun at the current moment. The current moment can be any moment on any day of the year. Optionally, the current moment can be any moment between 9:00 AM and 3:00 PM. This allows the system to operate under sufficient sunlight, improving its operational efficiency.

[0061] In conjunction with step 110 above, the method may further include detecting the first solar intensity received on the east side and the second solar intensity received on the west side of the wind turbine. In one embodiment of step 120 above, step 120 may further include, when the difference between the first and second solar intensities is within a normal range, and the larger of the first and second solar intensities reaches a preset solar intensity, obtaining the current solar altitude angle and current solar azimuth angle of the wind farm based on UTC. The fact that the difference between the first and second solar intensities is within a normal range indicates that both the first and second solar intensities are within normal illumination levels. Selecting the larger of the first and second solar intensities allows for timely detection of changes in solar intensity, which is more conducive to timely determination of the current solar altitude angle and current solar azimuth angle, improving the efficiency of determining the current solar altitude angle and current solar azimuth angle. The normal range can be set according to user requirements.

[0062] The aforementioned light intensity detection device may, but is not limited to, two light intensity detection devices. The two light intensity detection devices may be a first light intensity detection device and a second light intensity detection device, respectively. The first light intensity may be measured by the first light intensity detection device. The second light intensity may be measured by the second light intensity detection device.

[0063] In some other embodiments of step 120 above, step 120 may further include the following: if the difference between the first light intensity and the second light intensity is within the normal difference range, it indicates that both the first light intensity and the second light intensity are within the normal light range. When either the first light intensity or the second light intensity reaches the preset light intensity, the current solar altitude angle and the current solar azimuth angle of the wind farm can be obtained according to UTC.

[0064] The method may further include, after detecting the first solar intensity received on the east side and the second solar intensity received on the west side of the wind turbine, issuing an alarm indicating an erroneous solar intensity if the difference between the first and second solar intensities exceeds the normal range. Thus, when the difference between the first and second solar intensities received on the east side and the second solar intensities received on the west side is significant, it is considered that the solar intensity detection has malfunctioned, and the first and second solar intensities can no longer be used, requiring an alarm to indicate subsequent maintenance and repair.

[0065] In some embodiments, step 120 may further include obtaining, based on UTC, the current solar altitude angle and current solar azimuth angle of the wind farm corresponding to the UTC and pre-stored. Thus, by pre-establishing the relationship between UTC, the latitude and longitude of the wind farm, and the current solar altitude angle and current solar azimuth angle, the current solar altitude angle and current solar azimuth angle of the wind farm can be directly found when the UTC is obtained in subsequent use, improving the efficiency of determining the current solar altitude angle and current solar azimuth angle of the wind farm.

[0066] In some embodiments, step 120 may further include obtaining the current solar altitude angle and current solar azimuth angle of the wind farm based on the UTC and the latitude and longitude of the wind farm. Specific details are as follows:

[0067] In some application examples, the following formulas can be used to calculate the current solar altitude angle α and the current solar azimuth angle of a wind farm, based on UTC and the latitude and longitude of the wind farm, to obtain the current solar altitude angle and current solar azimuth angle. The formula for calculating the current solar altitude angle α of the wind farm is as follows:

[0068]

[0069] Where α is the current solar altitude angle of the wind farm, and δ is the solar declination angle. The magnitude of the declination angle depends on the number of days in the year. The formula for calculating δ is as follows:

[0070] In the formula, d is the number of days in the year for the current date. For example, if the current date is "2020-1-1", then d is 1.

[0071] The latitude of the wind farm location is used for calculation. HRA is short for the hour angle, and the formula for calculating HRA is as follows:

[0072] HRA = 15°(LST - 12) where LST is short for local solar time. The formula for calculating LST is as follows:

[0073]

[0074] LT is short for Local Time, and TC is short for Time Correction Factor. The formula for calculating TC is as follows:

[0075] TC = 4(Longitude - LSTM) + EoT

[0076] LSTM stands for Local Standard Time Meridian, and it can be calculated using the following formula:

[0077] LSTM = 15°ΔT UTC

[0078] In the above formula, ΔTUTC represents the number of hours from UTC time to the current time, and 15 degrees is calculated using the following formula:

[0079] 15° = 360° / 24 hours

[0080] EoT is short for the equation of time. The formula for calculating EoT is as follows:

[0081] EoT=9.87sin(2B)-7.53cos(B)-1.5sin(B)

[0082]

[0083] The formula for calculating the current solar azimuth (Azimuth) of a wind farm is as follows:

[0084]

[0085] Step 130: If the current solar altitude angle and the current solar azimuth angle meet the conditions for generating light and shadow effects, control the wind turbine to shut down.

[0086] The conditions for generating light and shadow effects are used to reflect whether wind turbines at the current solar altitude angle and solar azimuth angle affect residential areas. If the conditions for generating light and shadow effects are met at the current solar altitude angle and solar azimuth angle, then light and shadow effects occur. If the conditions for generating light and shadow effects are not met at the current solar altitude angle and solar azimuth angle, then no light and shadow effects occur. In some embodiments, the conditions for generating light and shadow effects can be determined by comparing the current solar altitude angle with a reference solar altitude angle, and by comparing the current solar azimuth angle with a range of reference solar azimuth angles. In other embodiments, the conditions for generating light and shadow effects can be preset, and this is not limited here.

[0087] Step 130 above may further include: a first step, comparing the current solar altitude angle with a reference solar altitude angle; a second step, comparing the current solar azimuth angle with a range of reference solar azimuth angles; and a third step, determining that the current solar altitude angle and current solar azimuth angle meet the conditions for generating light and shadow effects when the current solar altitude angle is less than the reference solar altitude angle and the current solar azimuth angle is within the range of the reference solar azimuth angle. Comparing the current solar altitude angle with the reference solar altitude angle and comparing the current solar azimuth angle with a range of reference solar azimuth angles to determine whether the current solar altitude angle and current solar azimuth angle meet the conditions for generating light and shadow effects is direct and convenient, and can improve the efficiency of determining light and shadow effects.

[0088] Among them, light and shadow impact refers to the light and shadow pollution caused by wind turbines to residential areas due to the sun.

[0089] The solar azimuth angle is the angle between the projection of sunlight onto the ground plane and the due south direction of the ground plane, measured in degrees. The reference solar azimuth angle range refers to a predetermined azimuth angle at which the shadow cast by the sun on a residential building is affected by the wind turbine. In some embodiments, the reference solar azimuth angle range may include [0 degrees, -20 degrees] and [20 degrees, 90 degrees]. Thus, when the current solar altitude angle is less than the reference solar altitude angle, and the current solar azimuth angle is less than -20 degrees and greater than 20 degrees, the conditions for the current solar altitude angle and current solar azimuth angle to produce a shadow effect are determined. Of course, other predetermined reference solar azimuth angle ranges at which the shadow cast by the sun on a residential building is affected by the wind turbine can also be used; all of these fall within the protection scope of this application's embodiments and will not be listed here.

[0090] The reference solar altitude angle refers to the predetermined altitude angle at which the shadow cast by the wind turbine affects residential buildings. This reference solar altitude angle can be, but is not limited to, the maximum solar altitude angle on the winter solstice, and the range of reference solar azimuth angles can include the solar azimuth angle corresponding to the maximum solar altitude angle. This results in a smaller amount of data on the winter solstice, less data to compare, and higher data processing efficiency. For example, noon on the winter solstice is the time of maximum solar altitude angle. The larger the solar altitude angle, the smaller the shadow of the wind turbine; the smaller the solar altitude angle, the longer the shadow of the wind turbine. Therefore, the solar altitude angle and azimuth angle at noon on the winter solstice can be used as the standard, but are not limited to. Residents in northern latitudes are significantly affected by the shadow cast by wind turbines, so this embodiment can use, but is not limited to, the solar altitude angle on the winter solstice in northern latitudes as the standard.

[0091] In some embodiments of step 130 above, the first step may further include comparing the current solar altitude angle with multiple reference solar altitude angles. The second step may further include comparing the current solar azimuth angle with a range of multiple reference solar azimuth angles. The third step may further include determining that the current solar altitude angle and the current solar azimuth angle meet the conditions for generating light and shadow effects when the current solar altitude angle is less than multiple reference solar altitude angles and the current solar azimuth angle is within the range of multiple reference solar azimuth angles.

[0092] In some other embodiments of step 130 above, the first step may further include comparing the current solar altitude angle with all reference solar altitude angles. The second step may further include comparing the current solar azimuth angle with multiple ranges of reference solar azimuth angles. The third step may further include determining that the current solar altitude angle and the current solar azimuth angle meet the conditions for generating light and shadow effects when the current solar altitude angle is less than all reference solar altitude angles and the current solar azimuth angle is within multiple ranges of reference solar azimuth angles.

[0093] The aforementioned reference solar altitude angle and reference solar azimuth angle ranges can be stored in a pre-established database. This allows for the storage of the reference solar altitude angle and reference solar azimuth angle ranges, based on pre-measured measurements of the light and shadow effects generated by the wind farm, in a database for convenient subsequent comparison. Detailed explanation follows.

[0094] Step 130 above may further include a first step: determining, based on UTC, the reference time corresponding to UTC and the range of reference solar altitude angle and reference solar azimuth angle under the reference time in the database. The database stores multiple ranges of reference solar altitude angle and reference solar azimuth angle under multiple reference times. In some embodiments using a reference season, the first step above may further include determining, based on UTC, the reference time corresponding to UTC and the range of reference solar altitude angle and reference solar azimuth angle under the reference time in the database, which may include, but is not limited to, the first step: determining the current season based on UTC. The second step is to determine, based on the current season, the reference season corresponding to the current season and the range of reference solar altitude angle and reference solar azimuth angle under the reference season in the database. The range of reference solar altitude angle and reference solar azimuth angle under the reference season is a pre-established range of reference solar altitude angle and reference solar azimuth angle in the database, and the amount of pre-established data is relatively small. In this way, not only can the range of reference solar altitude angle and reference solar azimuth angle for the current season be quickly found from the vast amount of data in the database, but the range of reference solar altitude angle and reference solar azimuth angle for the current season can also be directly compared with the current solar altitude angle and current solar azimuth angle. The amount of comparison data is small, so the efficiency of determining the influence of light and shadow is high. For example, the reference season may include, but is not limited to, one or more of winter and spring.

[0095] In some other embodiments using a reference season, the first step described above may further include: determining the current season based on UTC; determining, based on the current season, a reference season in the database corresponding to the current season, along with the range of reference solar altitude angles and reference solar azimuth angles for that reference season; and determining, based on UTC, a reference time corresponding to the UTC, along with the range of reference solar altitude angles and reference solar azimuth angles for that reference time, from the range of reference solar altitude angles and reference solar azimuth angles for that reference season. This facilitates quick searching of the reference season corresponding to the current season from multiple seasons in the database, improving search efficiency.

[0096] In some embodiments using a reference month, the first step described above may further include determining, based on UTC, the reference time corresponding to UTC in the database, and the range of reference solar altitude angle and reference solar azimuth angle under that reference time. This may include, but is not limited to, the first step of determining the current month based on UTC. The second step involves determining, based on the current month, the reference month corresponding to the current month in the database, and the range of reference solar altitude angle and reference solar azimuth angle for that reference month. The range of reference solar altitude angle and reference solar azimuth angle under the reference month is pre-established in the database, resulting in a smaller amount of pre-established data. This allows for the rapid retrieval of the reference solar altitude angle and reference solar azimuth angle range from the vast amount of data in the database, and also enables direct comparison of the reference solar altitude angle and reference solar azimuth angle range with the current solar altitude angle and current solar azimuth angle, resulting in a smaller amount of comparison data and higher efficiency in determining the influence of light and shadow. For example, the reference month may include, but is not limited to, one or more of December, January, February, and March.

[0097] In some other embodiments using a reference month, the first step described above may further include: determining the current month based on UTC; determining, based on the current month, a reference month in the database corresponding to the current month, along with its reference solar altitude angle and reference solar azimuth angle range; and determining, based on UTC, a reference time corresponding to the UTC, along with its reference solar altitude angle and reference solar azimuth angle range, from the reference solar altitude angle and reference solar azimuth angle range of the reference month. This facilitates quick searching of the reference month corresponding to the current month from among numerous months in the database, improving search efficiency.

[0098] Step 140: If the current solar altitude angle and current solar azimuth angle meet the conditions for generating light and shadow effects, control the wind turbine to shut down. If the conditions for generating light and shadow effects are met, indicating that light and shadow effects are occurring, obtain the wind turbine control command, which is used to control the wind turbine to shut down. The wind turbine control command can be a yaw and speed control command. If the conditions for generating light and shadow effects are not met, indicating that light and shadow effects are not occurring, the wind turbine remains running, and the process returns to step 110. In this way, controlling the start and stop of the wind turbine can reduce light and shadow pollution generated during wind turbine operation, providing valuable reference for wind farm site selection, environmental management, and urban planning. Furthermore, if the current solar altitude angle is not less than the reference solar altitude angle, and the current solar azimuth angle is outside the range of the reference solar azimuth angle (e.g., the current solar altitude angle is not less than the reference solar altitude angle, and the current solar azimuth angle is greater than -20 degrees and less than 20 degrees), determine that the current solar altitude angle and current solar azimuth angle meet the conditions for generating light and shadow effects. I will not go into details here.

[0099] In this embodiment, UTC is used, which ensures uniform time and is not subject to external interference. Furthermore, UTC time can clearly define the duration of light and shadow effects. The combination of UTC time with the latitude and longitude of different land regions can determine the light and shadow effects at different times in different land regions, thereby increasing the range of light and shadow control in land regions and thus improving the applicability of the method.

[0100] Figure 3 The diagram shown is a simplified schematic of the wind turbine light and shadow control method provided in the embodiment of this application.

[0101] like Figure 3 As shown, 1. Two light intensity detection devices are installed within a range where sunlight is acceptable. The light intensity at the current moment is obtained through the two light intensity detection devices to ensure that the two light intensity detection devices are in a well-lit environment and can receive light normally.

[0102] 2. Obtain the UTC and latitude and longitude of the wind farm from the main control unit of the wind turbine.

[0103] 3. When the light intensity is detected to reach the preset light intensity, calculate the current solar altitude angle and the current solar azimuth angle based on the UTC and the latitude and longitude of the wind farm.

[0104] 4. Compare the current solar altitude angle with the reference solar altitude angle in the database, and compare the current solar azimuth angle with the range of reference solar azimuth angles in the database to determine whether the wind turbine has a light and shadow effect on residential buildings.

[0105] 5. If light and shadow effects occur, a unit control command is received and sent to the wind turbine's main controller to shut down the wind turbine. Specifically, after receiving the instruction from the main controller, it determines whether to execute the unit control command based on the set conditions for unit load safety. These set conditions may include whether the wind turbine is in full-load mode and whether the wind speed has reached a preset speed. If the wind speed reaches the preset speed, it indicates excessive wind speed, and since the wind turbine is in full-load mode, the load is too high. The wind turbine will not execute the unit control command and will return to step 1 above. This avoids the impact of shutdown on the wind turbine's lifespan. If the wind speed does not reach the preset speed and the wind turbine exits full-load mode, the unit control command is executed.

[0106] Figure 4 The diagram shown is a block diagram of the wind turbine light and shadow control device provided in an embodiment of this application.

[0107] like Figure 4 As shown, the wind turbine light and shadow control device in this application embodiment may include, but is not limited to:

[0108] The detection module 31 is used to detect the light intensity at the location of the wind turbine generator in the wind farm.

[0109] The acquisition module 32 is used to acquire the current solar altitude angle and current solar azimuth angle of the wind farm based on Coordinated Universal Time (UTC) when the light intensity is detected to reach the preset light intensity.

[0110] The light and shadow determination module 33 is used to determine whether the current solar altitude angle and the current solar azimuth angle meet the conditions for generating light and shadow effects.

[0111] The light and shadow control module 34 is used to control the wind turbine to shut down when the current solar altitude angle and current solar azimuth angle meet the conditions for generating light and shadow effects.

[0112] The specific implementation process of the functions and roles of each module in the above device can be found in the implementation process of the corresponding steps in the above method, and will not be repeated here.

[0113] Figure 5 The diagram shown is a block diagram of the wind turbine light and shadow control system 40 provided in an embodiment of this application.

[0114] like Figure 5 As shown, the wind turbine lighting control system 40 includes one or more processors 41 for implementing the wind turbine lighting control method described above.

[0115] The wind turbine light and shadow control system of this application embodiment can be independent of the main control of the wind turbine, and can interact with the main control of the wind turbine.

[0116] In some embodiments, the wind turbine lighting control system 40 may include a computer-readable storage medium 49, which may store a program that can be invoked by a processor 41, and may include a non-volatile storage medium. In some embodiments, the wind turbine lighting control system 40 may include memory 48 and an interface 47. In some embodiments, the wind turbine lighting control system 40 may also include other hardware depending on the actual application.

[0117] The computer-readable storage medium 49 of this application embodiment stores a program that, when executed by the processor 41, is used to implement the wind turbine light and shadow control method described above.

[0118] This application may take the form of a computer program product implemented on one or more computer-readable storage media 49 (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing program code. The computer-readable storage media 49 includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. The information may be computer-readable instructions, data structures, program modules, or other data. Examples of computer-readable storage media 49 include, but are not limited to: phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by a computing device.

[0119] The above are merely preferred embodiments of this specification and are not intended to limit this specification. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this specification shall be included within the scope of protection of this specification.

[0120] 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.

Claims

1. A method for controlling the light and shadow of a wind turbine generator, characterized in that, include: Detecting the light intensity at the location of the wind turbine in the wind farm specifically includes: detecting the first light intensity received on the east side and the second light intensity received on the west side of the wind turbine; When the difference between the first and second light intensities is within a normal range, and the larger of the first and second light intensities reaches a preset light intensity, the current solar altitude angle and current solar azimuth angle of the wind farm are obtained according to Coordinated Universal Time (UTC); and, Determine whether the current solar altitude angle and current solar azimuth angle meet the conditions for generating light and shadow effects; wherein, whether the current solar altitude angle and current solar azimuth angle meet the conditions for generating light and shadow effects includes: The current solar altitude angle is compared with the reference solar altitude angle; the current solar azimuth angle is compared with the range of the reference solar azimuth angle. If the current solar altitude angle is less than the reference solar altitude angle and the current solar azimuth angle is within the range of the reference solar azimuth angle, then the current solar altitude angle and the current solar azimuth angle are determined to meet the conditions for generating light and shadow effects; the reference solar altitude angle is the maximum solar altitude angle on the winter solstice. If the current solar altitude angle and current solar azimuth angle meet the conditions for generating light and shadow effects, the wind turbine unit will be shut down.

2. The wind turbine light and shadow control method as described in claim 1, characterized in that, The step of comparing the current solar altitude angle with the reference solar altitude angle includes: The current solar altitude angle is compared with multiple reference solar altitude angles; The step of comparing the current solar azimuth with the reference solar azimuth range includes: The current solar azimuth angle is compared with multiple reference solar azimuth angle ranges; The step of determining that the current solar altitude angle and current solar azimuth angle meet the conditions for generating light and shadow effects when the current solar altitude angle is less than the reference solar altitude angle and the current solar azimuth angle is within the range of the reference solar azimuth angle includes: When the current solar altitude angle is less than all of the reference solar altitude angles and the current solar azimuth angle is within the range of all of the reference solar azimuth angles, it is determined that the current solar altitude angle and the current solar azimuth angle meet the conditions for generating light and shadow effects.

3. The wind turbine light and shadow control method as described in claim 2, characterized in that, The reference solar azimuth range is the solar azimuth corresponding to the maximum solar altitude angle.

4. The wind turbine light and shadow control method as described in claim 2, characterized in that, Determining whether the current solar altitude angle and current solar azimuth angle meet the conditions for generating light and shadow effects includes: Based on the UTC, the reference time corresponding to the UTC and the range of reference solar altitude angle and reference solar azimuth angle under the reference time are determined in the database. The database stores the range of reference solar altitude angle and reference solar azimuth angle under multiple reference times.

5. The wind turbine light and shadow control method as described in claim 4, characterized in that, The step of determining the reference time corresponding to the UTC in the database, as well as the range of the reference solar altitude angle and reference solar azimuth angle under the reference time, based on the UTC, includes: Determine the current season based on the given UTC; Based on the current season, determine the reference season corresponding to the current season in the database, as well as the range of reference solar altitude angle and reference solar azimuth angle under the reference season.

6. The wind turbine light and shadow control method as described in claim 4, characterized in that, The step of determining the reference time corresponding to the UTC in the database, as well as the range of the reference solar altitude angle and reference solar azimuth angle under the reference time, based on the UTC, includes: Determine the current month based on the given UTC; Based on the current month, determine the reference month corresponding to the current month in the database, as well as the range of the reference solar altitude angle and reference solar azimuth angle for the reference month.

7. The wind turbine light and shadow control method as described in claim 1, characterized in that, The wind farm includes a first wind farm and a second wind farm located within the same predetermined area; the method further includes: Obtain the latitude and longitude of the wind farm, wherein the latitude and longitude of any wind turbine in the first wind farm and the second wind farm are obtained as the latitude and longitude of the first wind farm and the second wind farm.

8. A light and shadow control device for wind turbine generators, characterized in that, include: The detection module is used to detect the light intensity at the location of the wind turbine in the wind farm, specifically including: detecting the first light intensity received on the east side and the second light intensity received on the west side of the wind turbine; The acquisition module is used to acquire the current solar altitude angle and current solar azimuth angle of the wind farm according to Coordinated Universal Time (UTC) when the difference between the first light intensity and the second light intensity is within the normal difference range and the larger of the first light intensity and the second light intensity reaches the preset light intensity. A light and shadow determination module is used to determine whether the current solar altitude angle and current solar azimuth angle meet the conditions for generating light and shadow effects. The determination of whether the current solar altitude angle and current solar azimuth angle meet the conditions for generating light and shadow effects includes: comparing the current solar altitude angle with a reference solar altitude angle; comparing the current solar azimuth angle with a range of the reference solar azimuth angle; and determining that the current solar altitude angle and current solar azimuth angle meet the conditions for generating light and shadow effects if the current solar altitude angle is less than the reference solar altitude angle and the current solar azimuth angle is within the range of the reference solar azimuth angle. The reference solar altitude angle is the maximum solar altitude angle on the winter solstice. The light and shadow control module is used to control the wind turbine to shut down when the current solar altitude angle and the current solar azimuth angle meet the conditions for generating light and shadow effects.

9. A light and shadow control system for wind turbine generators, characterized in that, It includes one or more processors for implementing the wind turbine light and shadow control method as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, It stores a program that, when executed by a processor, implements the wind turbine light and shadow control method as described in any one of claims 1-7.

Images