Airspace control methods, devices and storage media

Abstract

This invention provides a method, apparatus, and storage medium for airspace control, belonging to the field of wind turbine control. The method includes: acquiring wind turbine operating parameters in real time; preprocessing the wind turbine operating parameters; storing the wind turbine operating parameters in different data storage bins according to wind speed; calculating the rate of change of each parameter in the current data storage bin based on the wind turbine operating parameters in each data storage bin; determining the conditions satisfied by the data in the current data storage bin based on the rate of change of each parameter; determining the current airspace range of each data storage bin based on the wind turbine operating parameters in each data storage bin; and determining a pitch correction strategy based on the current airspace range and the conditions satisfied by the data. This method processes and analyzes operating parameters collected in real time during normal wind turbine operation to provide a pitch correction strategy for the wind turbine, achieving real-time pitch correction without the need for additional hardware equipment, thus saving costs.

Description

Technical Field

[0001] This invention relates to the field of wind turbine control, specifically to a clearance control method, a clearance control device, and a machine-readable storage medium. Background Technology

[0002] Currently, my country's wind power development is entering the era of ultra-large wind turbines. Due to the declining performance and reduced lifespan of traditional wind turbines, and the near saturation of installed capacity in plains areas, wind turbine installations are expanding towards mountainous and offshore areas. To increase swept area and installed capacity, new turbines are currently being used with high towers and long blades. However, lightweight, long, flexible blades are prone to deformation. Furthermore, due to the complex geographical environment of wind turbine sites, complex wind conditions, and complex meteorological conditions such as cold waves and typhoons, wind turbine blades are at risk of tower swirl. Tower swirl can result in blade replacement or, in severe cases, the entire turbine being scrapped, leading to significant economic and property losses. Currently, most turbines use air clearance monitoring equipment to monitor the blade tip clearance distance in real time. When the monitored blade clearance value approaches the specified minimum clearance value, the turbine's main control system can immediately take protective measures, such as slowing down or retracting the blades. However, in severe weather conditions such as continuous fog or heavy rain, effective monitoring is difficult to achieve, and false alarms or missed alarms can easily occur, leading to untimely turbine control and limited protection effectiveness. Summary of the Invention

[0003] The purpose of this invention is to provide an airspace control method, device, and storage medium. This method processes and analyzes the operating parameters collected in real time during the normal operation of the wind turbine, and provides a pitch correction strategy for the wind turbine, enabling real-time pitch correction to ensure that the airspace of the wind turbine is within a safe range. No additional hardware equipment is required, thus saving costs.

[0004] To achieve the above objectives, a first aspect of the present invention provides a method for controlling airspace clearance, the method comprising:

[0005] Real-time acquisition of wind turbine operating parameters;

[0006] The operating parameters of the wind turbine units are stored in different data storage warehouses according to wind speed;

[0007] Calculate the rate of change of each parameter in the current data storage warehouse based on the wind turbine operating parameters in each data storage warehouse;

[0008] Determine the conditions that the data in the current data storage warehouse must meet based on the rate of change of each parameter;

[0009] The current clearance range of each data storage warehouse is determined based on the operating parameters of the wind turbine units in each data storage warehouse;

[0010] The pitch correction strategy is determined based on the current airspace range and the conditions met by the data.

[0011] Based on the above technical means, the operating parameters are stored and processed according to wind speed using a data storage warehouse. The pitch correction strategy is determined based on the data change rate of the parameters in each data storage warehouse and the air clearance status. The determined pitch correction strategy is related to the real-time operating parameters of the wind turbine, enabling real-time pitch correction and ensuring that the air clearance of the wind turbine is within a safe range. No new hardware equipment is required, saving costs.

[0012] In this embodiment of the application, the operating parameters of the wind turbine include at least: wind speed, generator speed, active power, and clearance distance.

[0013] The method further includes:

[0014] Preprocessing of wind turbine operating parameters:

[0015] Exclude operating parameters of wind turbine units with clearance distance values ​​greater than the preset clearance value;

[0016] The operating parameters of wind turbine units with active power values ​​less than the preset proportion are excluded;

[0017] Remove operating parameters of wind turbine units whose generator speed is lower than the preset speed.

[0018] Based on the above technical means, operating parameters with clearance distance values ​​greater than the preset clearance value are removed to prevent data with clearance distance values ​​within the safe range from entering the processing flow, thus increasing the amount of data processing. Similarly, when the active power is less than the standard power of the preset ratio and the generator speed is less than the preset speed, the clearance distance value of the wind turbine is within the safe range, and there is no need to perform clearance control. The corresponding data is removed to reduce the complexity of data processing.

[0019] In this embodiment of the application, the wind turbine operating parameters are stored in different data storage warehouses according to wind speed, including:

[0020] Multiple data storage warehouses are constructed based on the rated operating wind speed of the wind turbine and the preset wind speed intervals.

[0021] Based on the wind speed in the wind turbine operating parameters, the wind turbine operating parameters are stored in the corresponding data storage warehouse in a queue manner;

[0022] The data storage warehouse stores a preset number of data. When the preset number of data is reached, new data replaces the earliest data stored in the data storage warehouse.

[0023] Based on the above technical means, the wind turbine operation data is stored separately according to wind speed. At the same time, the amount of data in each data storage bin is controlled by replacing the first data that is entered, so that the amount of data in each data storage bin can represent the clearance distance over a certain period of time.

[0024] In this embodiment of the application, the data change rate includes wind speed acceleration, generator speed acceleration, and headroom change rate;

[0025] Calculate the rate of change of each parameter in the current data storage warehouse based on the wind turbine operating parameters in each data storage warehouse, including:

[0026] The rate of change of multiple adjacent data corresponding to each parameter is calculated based on the operating parameters of two adjacent wind turbine sets.

[0027] Calculate the average of the change rates of multiple adjacent data corresponding to the same parameter, and use it as the data change rate of the corresponding parameter in the current data storage warehouse.

[0028] Based on the aforementioned technical means, data that can standardize the rate of change of each parameter in the current data warehouse is calculated from the wind turbine operating parameters, providing a data basis for subsequent determination of pitch correction strategies.

[0029] In this embodiment of the application, the conditions that the data in the current data storage warehouse must meet are determined based on the data change rate of each parameter, including:

[0030] If the wind speed acceleration is greater than or equal to the wind speed acceleration threshold or the generator speed acceleration is greater than or equal to the speed acceleration threshold, and the net clearance change rate is less than zero, then the data in the current data storage warehouse is determined to meet the first condition.

[0031] If the wind speed acceleration is less than the wind speed acceleration threshold and the generator speed acceleration is less than the speed acceleration threshold, and the net clearance change rate is less than zero, then the data in the current data storage warehouse is determined to meet the second condition.

[0032] If the net air change rate is greater than or equal to zero, then the data in the current data storage warehouse is determined to meet the third condition.

[0033] Based on the aforementioned technical means, the current wind turbine operating parameters are divided into different condition states according to wind speed acceleration, generator speed acceleration, and headroom rate of change, which facilitates the subsequent determination of corresponding pitch correction strategies based on different conditions.

[0034] In this embodiment of the application, determining the current clearance range of the current data storage warehouse based on the operating parameters of the wind turbine units in each data storage warehouse includes:

[0035] The average clearance distance is calculated based on the clearance distance value in the wind turbine operating parameters in the current data storage warehouse and used as the current clearance distance.

[0036] If the second preset clearance is less than the current clearance and less than the third preset clearance, then the current clearance is determined to belong to the first range;

[0037] If the first preset clearance is less than or equal to the current clearance, which is less than or equal to the second preset clearance, then the current clearance is determined to belong to the second range.

[0038] If the current clearance is less than the first preset clearance, then the current clearance is determined to belong to the third range;

[0039] Among them, the first preset clearance is less than the second preset clearance, which is less than the third preset clearance.

[0040] Based on the above technical means, the current airspace range corresponding to different data storage warehouses can be determined, which will facilitate the subsequent determination of the corresponding pitch correction strategy based on the airspace range.

[0041] In this embodiment of the application, a pitch correction strategy is determined based on the current airspace interval and the conditions satisfied by the data, including:

[0042] If the current clearance is within the first range, then no adjustment to the paddle angle is required;

[0043] If the current airspace is within the third range, the wind turbine will be shut down immediately.

[0044] If the current airspace falls within the second range and the data meets the first condition, then the pitch correction value is set to the first preset value.

[0045] If the current airspace falls within the second range and the data meets the second condition, then set the pitch correction value to the second preset value.

[0046] If the current airspace falls within the second range and the data meets the third condition, then no pitch correction will be performed;

[0047] The first preset value is greater than the second preset value.

[0048] Based on the aforementioned technical means, the pitch correction value is determined according to the current airspace and data conditions. More pitch corrections are made when the risk of tower sweeping is greater, in order to ensure the safety of the wind turbine.

[0049] In this embodiment of the application, the method further includes:

[0050] After determining the pitch strategy, the preset pitch rate of the corresponding data storage bin is determined according to the data storage bin to which the current wind turbine operating parameters belong.

[0051] The pitch is adjusted according to the corresponding preset pitch rate and the corresponding pitch correction value.

[0052] Based on the aforementioned technical means, different pitch rates are adopted according to the different wind speeds in each data storage bin, so as to achieve a balance between smooth pitch control of the wind turbine and rapid adjustment of the wind turbine's clearance distance.

[0053] A second aspect of this application provides a clearance control device, the device comprising:

[0054] The data acquisition unit is used to acquire wind turbine operating parameters in real time.

[0055] The parameter storage unit is used to store the wind turbine operating parameters in different data storage bins according to wind speed;

[0056] The data change rate calculation unit is used to calculate the data change rate of each parameter in the current data storage warehouse based on the wind turbine operating parameters in each data storage warehouse.

[0057] The condition judgment unit is used to determine the conditions that the data in the current data storage warehouse must meet based on the data change rate of each parameter.

[0058] The clearance range determination unit is used to determine the current clearance range of each data storage warehouse based on the operating parameters of the wind turbine units in each data storage warehouse;

[0059] The pitch correction strategy determination unit is used to determine the pitch correction strategy based on the current airspace range and the conditions met by the data.

[0060] Based on the above technical means, the device uses a data storage bin to store and process operating parameters according to wind speed. The pitch correction strategy is determined based on the data change rate of parameters in each data storage bin and the air clearance status. The determined pitch correction strategy is related to the real-time operating parameters of the wind turbine, enabling real-time pitch correction and ensuring that the air clearance of the wind turbine is within a safe range. No new hardware equipment is required, saving costs.

[0061] A third aspect of this application provides a machine-readable storage medium storing instructions for causing a machine to perform the aforementioned clearance control method.

[0062] The above technical solution uses a data storage warehouse to store and process operating parameters according to wind speed. The pitch correction strategy is determined based on the data change rate of parameters in each data storage warehouse and the air clearance status. The determined pitch correction strategy is related to the real-time operating parameters of the wind turbine, enabling real-time pitch correction and ensuring that the air clearance of the wind turbine is within a safe range. No new hardware equipment is required, saving costs.

[0063] 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

[0064] 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:

[0065] Figure 1 This is a flowchart of an airspace control method provided in one embodiment of the present invention;

[0066] Figure 2 This is a block diagram of an airspace control device provided in one embodiment of the present invention. Detailed Implementation

[0067] 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.

[0068] Existing methods for controlling the airspace clearance of wind turbines have many problems. For example, adding laser wind radar for airspace feedforward protection control not only increases technical costs, but also makes it difficult to completely eliminate errors.

[0069] To address these problems, embodiments of the present invention provide an airspace control method, such as... Figure 1 As shown, the method includes:

[0070] S1: Real-time acquisition of wind turbine operating parameters. In this embodiment, the wind turbine operating parameters include: wind speed, generator speed, active power, clearance distance, and blade angle. These parameters are collected during wind turbine operation and aggregated into the wind turbine control system. This application can directly obtain these parameters from the wind turbine control system through the corresponding data interface.

[0071] S2: Store the wind turbine operating parameters in different data storage bins according to wind speed.

[0072] In this embodiment of the application, the wind turbine operating parameters are stored in different data storage warehouses according to wind speed, including:

[0073] Based on the rated operating wind speed of the wind turbine and the preset wind speed intervals, multiple data storage bins are constructed. For example, if the rated operating wind speed of the wind turbine is 5~20 m / s, three data storage bins can be constructed at wind speed intervals of 5 m / s. The wind speed of each data storage bin can be expressed as: wind speed [5a, 5a + 5] (a = 1, 2, 3), meaning the first data storage bin stores wind turbine operating data for wind speeds within the range of [5-10], the second data storage bin stores wind turbine operating data for wind speeds within the range of [10-15], and the third data storage bin stores wind turbine operating data for wind speeds within the range of [15-20]. Data storage bins can also be constructed according to other preset wind speed intervals.

[0074] Based on the wind speed in the wind turbine operating parameters, the wind turbine operating parameters are stored in the corresponding data storage warehouse in a queue manner.

[0075] The data storage bin stores a preset number of data items. When the preset number of data items is reached, new data replaces the oldest data items stored in the data storage bin. In one embodiment, the preset number is 50, and each data storage bin stores only the latest 50 data items.

[0076] Based on the above technical means, the wind turbine operation data is stored separately according to wind speed. At the same time, the amount of data in each data storage bin is controlled by replacing the first data that is entered, so that the amount of data in each data storage bin can represent the clearance distance over a certain period of time.

[0077] S3: Calculate the rate of change of each parameter in the current data storage warehouse based on the wind turbine operating parameters in each data storage warehouse.

[0078] In this embodiment of the application, the data change rate includes wind speed acceleration, generator speed acceleration, and headroom change rate;

[0079] Calculate the rate of change of each parameter in the current data storage warehouse based on the wind turbine operating parameters in each data storage warehouse, including:

[0080] The rate of change of multiple adjacent data corresponding to each parameter is calculated based on the operating parameters of two adjacent wind turbine sets.

[0081] Calculate the average of the change rates of multiple adjacent data corresponding to the same parameter, and use it as the data change rate of the corresponding parameter in the current data storage warehouse.

[0082] In this embodiment of the application, the wind speed acceleration is calculated based on the wind speed in the operating parameters of two adjacent sets of wind turbine units;

[0083] The generator speed acceleration is calculated based on the generator speed in the operating parameters of the two adjacent wind turbine sets.

[0084] The rate of change of the clearance value is calculated based on the clearance distance value in the operating parameters of two adjacent wind turbine units. The time used to calculate the rate of change is the data collection interval of the wind power rapid operation parameters. In one embodiment of this application, the data collection interval is 20ms.

[0085] Based on the aforementioned technical means, data that can standardize the rate of change of each parameter in the current data warehouse is calculated from the wind turbine operating parameters, providing a data basis for subsequent determination of pitch correction strategies.

[0086] S4: Determine the conditions that the data in the current data storage warehouse must meet based on the rate of change of each parameter.

[0087] In this embodiment of the application, the conditions that the data in the current data storage warehouse must meet are determined based on the data change rate of each parameter, including:

[0088] If the wind speed acceleration is greater than or equal to the wind speed acceleration threshold or the generator speed acceleration is greater than or equal to the speed acceleration threshold, and the net clearance change rate is less than zero, then the data in the current data storage warehouse is determined to meet the first condition.

[0089] If the wind speed acceleration is less than the wind speed acceleration threshold and the generator speed acceleration is less than the speed acceleration threshold, and the net clearance change rate is less than zero, then the data in the current data storage warehouse is determined to meet the second condition.

[0090] If the net air clearance change rate is greater than or equal to zero, then the data in the current data storage warehouse is determined to meet the third condition. In this embodiment, the wind speed acceleration threshold and the generator speed acceleration threshold are determined based on the operating parameters of the wind turbine and can be adjusted in real time according to the wind farm environment.

[0091] Based on the aforementioned technical means, the current wind turbine operating parameters are divided into different condition states according to wind speed acceleration, generator speed acceleration, and headroom rate of change, which facilitates the subsequent determination of corresponding pitch correction strategies based on different conditions.

[0092] S5: Determine the current clearance range of each data storage warehouse based on the operating parameters of the wind turbine units in each data storage warehouse.

[0093] In this embodiment of the application, determining the current clearance range of the current data storage warehouse based on the operating parameters of the wind turbine units in each data storage warehouse includes:

[0094] The average clearance distance is calculated based on the clearance distance value in the wind turbine operating parameters in the current data storage warehouse and used as the current clearance distance.

[0095] If the second preset clearance is less than the current clearance and less than the third preset clearance, then the current clearance is determined to belong to the first range;

[0096] If the first preset clearance is less than or equal to the current clearance, which is less than or equal to the second preset clearance, then the current clearance is determined to belong to the second range.

[0097] If the current clearance is less than the first preset clearance, then the current clearance is determined to belong to the third range;

[0098] The first preset clearance is less than the second preset clearance, which is less than the third preset clearance. The first, second, and third preset clearances are all set according to the design parameters of the wind turbine. In one embodiment, the first preset clearance is 4m, the second preset clearance is 7m, and the third preset clearance is 10m. Based on this, the first range is 7m < clearance < 10m, the second range is 4m ≤ clearance ≤ 7m, and the third range is clearance < 4m.

[0099] Based on the above technical means, the current airspace range corresponding to different data storage warehouses can be determined, which will facilitate the subsequent determination of the corresponding pitch correction strategy based on the airspace range.

[0100] S6: Determine the pitch correction strategy based on the current airspace range and the conditions met by the data.

[0101] In this embodiment of the application, a pitch correction strategy is determined based on the current airspace interval and the conditions satisfied by the data, including:

[0102] If the current clearance is within the first range, then no adjustment to the paddle angle is required;

[0103] If the current airspace is within the third range, the wind turbine will be shut down immediately.

[0104] If the current airspace falls within the second range and the data meets the first condition, then the pitch correction value is set to the first preset value.

[0105] If the current airspace falls within the second range and the data meets the second condition, then set the pitch correction value to the second preset value.

[0106] If the current airspace falls within the second range and the data meets the third condition, then no pitch correction will be performed;

[0107] The first preset value is greater than the second preset value. In this embodiment, the first and second preset values ​​are set according to the safe clearance distance of the wind turbine and the clearance distance under different wind speeds and pitch angles, with the ultimate goal of ensuring that the clearance of the wind turbine blades after pitch control is within a safe range.

[0108] The headroom falls within the second range. In this case, the risk of wind turbine sweeping the tower increases. Since the headroom can be increased by adjusting the pitch, it is preferable to adjust the pitch. At this time, the data meets the first condition, indicating that the wind speed or generator speed is also increasing. It can be predicted that the headroom will decrease in the future. Based on this, the pitch is adjusted more at the current moment to increase the pitch angle more, so that the increased wind speed will have less wind action on the wind turbine blades. This reduces the imbalance caused by the force on the blade tips and keeps the headroom of the wind turbine blade tips within a safe range.

[0109] When the data meets the second condition, the wind speed changes by decreasing or slowly increasing. In this case, there is no need to adjust the pitch in advance. Only reasonable pitch adjustment is needed to ensure that the wind turbine's headroom is safe enough after adjustment, while also ensuring the wind turbine's power generation.

[0110] Based on the aforementioned technical means, the pitch correction value is determined according to the current airspace and the conditions met by the data, thereby enabling airspace control to be achieved by adopting different strategies based on real-time data.

[0111] Based on the above technical means, the operating parameters are stored and processed according to wind speed using a data storage warehouse. The pitch correction strategy is determined based on the data change rate of the parameters in each data storage warehouse and the air clearance status. The determined pitch correction strategy is related to the real-time operating parameters of the wind turbine, enabling real-time pitch correction and ensuring that the air clearance of the wind turbine is within a safe range. No new hardware equipment is required, saving costs.

[0112] In this embodiment of the application, the method further includes:

[0113] After determining the pitch strategy, the preset pitch rate of the corresponding data storage bin is determined according to the data storage bin to which the current wind turbine operating parameters belong.

[0114] The wind turbine control system executes pitch control according to the corresponding preset pitch rate and the corresponding pitch correction value. Upon receiving the corresponding pitch correction value, the wind turbine control system superimposes the current pitch angle with the correction value to obtain the target pitch angle, and then controls the pitch motor to adjust the pitch according to the corresponding pitch rate. In this embodiment, the higher the wind speed of the data storage compartment, the higher the pitch rate. For example, if the wind speed in the current wind turbine operating parameters is 6 m / s, and 6 m / s belongs to the first data storage compartment, with a pitch rate of α corresponding to the first data storage compartment, then the pitch motor is controlled to adjust the pitch according to α. This allows for different pitch rates to be used depending on the current wind speed. At higher wind speeds, the wind turbine adjusts the pitch quickly to the target pitch angle, reducing the risk of tower sweep; at lower wind speeds, slower pitch adjustment improves the wind turbine's balance.

[0115] In this embodiment of the application, the method further includes:

[0116] Preprocessing of wind turbine operating parameters.

[0117] In this embodiment of the application, the preprocessing of the wind turbine operating parameters includes:

[0118] Operating parameters of wind turbines with clearance distances greater than a preset clearance value are excluded. In this embodiment, the preset clearance value is the absolutely safe clearance value for the wind turbine during operation. This clearance value is determined based on the design parameters of the wind turbine. If the clearance distance value in the operating parameters of the wind turbine is greater than this preset clearance value, it indicates that the current clearance of the wind turbine is safe and no correction or adjustment is required. Furthermore, the preset clearance value must be equal to a third preset clearance value to cover all operating conditions of the wind turbine.

[0119] Operating parameters of wind turbines with active power values ​​lower than a preset percentage are excluded. In this embodiment, the standard power is obtained from the standard power curve of the wind turbine based on the current wind speed, and the preset percentage is set based on the active power value when the wind turbine is operating in a safe airspace. In some embodiments, the preset percentage is 60%.

[0120] Wind turbine operating parameters with generator speeds lower than a preset speed are excluded. In this embodiment, the preset speed is based on the generator speed during wind turbine operation when the airspace is safe. In one embodiment, the preset speed is 1300 rpm.

[0121] Based on the above technical means, operating parameters with clearance distance values ​​greater than the preset clearance value are removed to prevent data with clearance distance values ​​within the safe range from entering the processing flow, thus increasing the amount of data processing. Similarly, when the active power is less than the standard power of the preset ratio and the generator speed is less than the preset speed, the clearance distance value of the wind turbine is within the safe range, and there is no need to perform clearance control. The corresponding data is removed to reduce the complexity of data processing.

[0122] A second aspect of this application provides an airspace control device, such as... Figure 2 As shown, the device includes:

[0123] The data acquisition unit is used to acquire wind turbine operating parameters in real time.

[0124] The data preprocessing unit is used to preprocess the operating parameters of the wind turbine.

[0125] The parameter storage unit is used to store the wind turbine operating parameters in different data storage bins according to wind speed;

[0126] The data change rate calculation unit is used to calculate the data change rate of each parameter in the current data storage warehouse based on the wind turbine operating parameters in each data storage warehouse.

[0127] The condition judgment unit is used to determine the conditions that the data in the current data storage warehouse must meet based on the data change rate of each parameter.

[0128] The clearance range determination unit is used to determine the current clearance range of each data storage warehouse based on the operating parameters of the wind turbine units in each data storage warehouse;

[0129] The pitch correction strategy determination unit is used to determine the pitch correction strategy based on the current airspace range and the conditions met by the data.

[0130] Based on the above technical means, the device uses a data storage bin to store and process operating parameters according to wind speed. The pitch correction strategy is determined based on the data change rate of parameters in each data storage bin and the air clearance status. The determined pitch correction strategy is related to the real-time operating parameters of the wind turbine, enabling real-time pitch correction and ensuring that the air clearance of the wind turbine is within a safe range. No new hardware equipment is required, saving costs.

[0131] A third aspect of this application provides a machine-readable storage medium storing instructions for causing a machine to perform the aforementioned clearance control method.

[0132] 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.

[0133] 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.

[0134] 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 controlling airspace clearance, characterized in that, The method includes: Real-time acquisition of wind turbine operating parameters; The operating parameters of the wind turbine units are stored in different data storage warehouses according to wind speed; Calculate the data change rate of each parameter in the current data storage warehouse based on the wind turbine operating parameters in each data storage warehouse. The data change rate includes wind speed acceleration, generator speed acceleration, and net clearance change rate. The conditions that the data in the current data storage warehouse must meet are determined based on the rate of change of each parameter, including: If the wind speed acceleration is greater than or equal to the wind speed acceleration threshold or the generator speed acceleration is greater than or equal to the speed acceleration threshold, and the net clearance change rate is less than zero, then the data in the current data storage warehouse is determined to meet the first condition. If the wind speed acceleration is less than the wind speed acceleration threshold and the generator speed acceleration is less than the speed acceleration threshold, and the net clearance change rate is less than zero, then the data in the current data storage warehouse is determined to meet the second condition. If the net air change rate is greater than or equal to zero, then the data in the current data storage warehouse is determined to meet the third condition; The current clearance range of each data storage warehouse is determined based on the operating parameters of the wind turbine units in each data storage warehouse, including: The average clearance distance is calculated based on the clearance distance value in the wind turbine operating parameters in the current data storage warehouse and used as the current clearance distance. If the second preset clearance is less than the current clearance and less than the third preset clearance, then the current clearance is determined to belong to the first range; If the first preset clearance is less than or equal to the current clearance, which is less than or equal to the second preset clearance, then the current clearance is determined to belong to the second range. If the current clearance is less than the first preset clearance, then the current clearance is determined to belong to the third range; Among them, the first preset clearance is less than the second preset clearance is less than the third preset clearance; The pitch correction strategy is determined based on the current airspace range and the conditions met by the data, including: If the current clearance is within the first range, then no adjustment to the paddle angle is required; If the current airspace is within the third range, the wind turbine will be shut down immediately. If the current airspace falls within the second range and the data meets the first condition, then the pitch correction value is set to the first preset value. If the current airspace falls within the second range and the data meets the second condition, then set the pitch correction value to the second preset value. If the current airspace falls within the second range and the data meets the third condition, then no pitch correction will be performed; The first preset value is greater than the second preset value.

2. The airspace control method according to claim 1, characterized in that, The operating parameters of the wind turbine generator set include at least: wind speed, generator speed, active power, and clearance distance. The method further includes: Preprocessing of wind turbine operating parameters: Exclude operating parameters of wind turbine units with clearance distance values ​​greater than the preset clearance value; The operating parameters of wind turbine units with active power values ​​less than the preset proportion are excluded; Remove operating parameters of wind turbine units whose generator speed is lower than the preset speed.

3. The airspace control method according to claim 1, characterized in that, The wind turbine operating parameters are stored in different data storage warehouses according to wind speed, including: Multiple data storage bins are constructed based on the rated operating wind speed of the wind turbine and the preset wind speed intervals. Based on the wind speed in the wind turbine operating parameters, the wind turbine operating parameters are stored in the corresponding data storage warehouse in a queue manner; The data storage warehouse stores a preset number of data. When the preset number of data is reached, new data replaces the earliest data stored in the data storage warehouse.

4. The airspace control method according to claim 1, characterized in that, Calculate the rate of change of each parameter in the current data storage warehouse based on the wind turbine operating parameters in each data storage warehouse, including: The rate of change of multiple adjacent data corresponding to each parameter is calculated based on the operating parameters of two adjacent wind turbine sets. Calculate the average of the change rates of multiple adjacent data corresponding to the same parameter, and use it as the data change rate of the corresponding parameter in the current data storage warehouse.

5. The airspace control method according to claim 1, characterized in that, The method further includes: After determining the pitch strategy, the preset pitch rate of the corresponding data storage bin is determined according to the data storage bin to which the current wind turbine operating parameters belong. The pitch is adjusted according to the corresponding preset pitch rate and the corresponding pitch correction value.

6. An airspace control device, characterized in that, The device includes: The data acquisition unit is used to acquire wind turbine operating parameters in real time. The parameter storage unit is used to store the wind turbine operating parameters in different data storage bins according to wind speed; The data change rate calculation unit is used to calculate the data change rate of each parameter in the current data storage warehouse based on the wind turbine operating parameters in each data storage warehouse. The data change rate includes wind speed acceleration, generator speed acceleration, and net clearance change rate. The condition judgment unit is used to determine the conditions that the data in the current data storage warehouse must meet based on the data change rate of each parameter, including: If the wind speed acceleration is greater than or equal to the wind speed acceleration threshold or the generator speed acceleration is greater than or equal to the speed acceleration threshold, and the net clearance change rate is less than zero, then the data in the current data storage warehouse is determined to meet the first condition. If the wind speed acceleration is less than the wind speed acceleration threshold and the generator speed acceleration is less than the speed acceleration threshold, and the net clearance change rate is less than zero, then the data in the current data storage warehouse is determined to meet the second condition. If the net air change rate is greater than or equal to zero, then the data in the current data storage warehouse is determined to meet the third condition; The clearance range determination unit is used to determine the current clearance range of each data storage warehouse based on the operating parameters of the wind turbine units in each data storage warehouse, including: The average clearance distance is calculated based on the clearance distance value in the wind turbine operating parameters in the current data storage warehouse and used as the current clearance distance. If the second preset clearance is less than the current clearance and less than the third preset clearance, then the current clearance is determined to belong to the first range; If the first preset clearance is less than or equal to the current clearance, which is less than or equal to the second preset clearance, then the current clearance is determined to belong to the second range. If the current clearance is less than the first preset clearance, then the current clearance is determined to belong to the third range; Among them, the first preset clearance is less than the second preset clearance is less than the third preset clearance; The pitch correction strategy determination unit is used to determine the pitch correction strategy based on the current airspace range and the conditions met by the data, including: If the current clearance is within the first range, then no adjustment to the paddle angle is required; If the current airspace is within the third range, the wind turbine will be shut down immediately. If the current airspace falls within the second range and the data meets the first condition, then the pitch correction value is set to the first preset value. If the current airspace falls within the second range and the data meets the second condition, then set the pitch correction value to the second preset value. If the current airspace falls within the second range and the data meets the third condition, then no pitch correction will be performed; The first preset value is greater than the second preset value.

7. A machine-readable storage medium storing instructions for causing a machine to perform the clearance control method according to any one of claims 1-5.

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