A wind turbine unit feathering method and device, electronic equipment and storage medium

Abstract

Embodiments of the application provide a wind turbine pitch method, device, electronic equipment and storage medium, which relate to the technical field of wind power equipment. The method is applied to a controller of a wind turbine, and the wind turbine further includes three blades. The method includes: when the wind turbine enters a pitch state, blade state information of each blade is acquired respectively, and whether a target blade that occurs pitch jamming exists in each blade is determined based on the blade state information. If yes, an environmental parameter is acquired, and whether a reverse pitch condition is reached is determined based on the environmental parameter. If the reverse pitch condition is reached, the target blade is controlled to reverse pitch to a target position. The target position is a position that each blade needs to reach in the pitch state. The application can quickly control the blade to reach a safe position when pitch jamming failure occurs in the blade of the wind turbine, so that the wind turbine is normally stopped.

Description

Technical Field

[0001] This invention relates to the field of wind power equipment technology, and more specifically, to a method, apparatus, electronic device, and storage medium for feathering wind turbine generators. Background Technology

[0002] Wind power accounts for a large proportion of clean energy. Most wind power is generated by converting the kinetic energy of wind into electrical energy through wind turbines. In case of malfunctions or other emergencies, wind turbines will feather all blades to a 90° position to minimize the stress on the blades. This allows the turbine to quickly reduce the rotor speed through air braking, enabling the turbine to be shut down for maintenance.

[0003] However, blades may jam during feathering, preventing them from retracting smoothly to a safe stopping position. This prevents the wind turbine from shutting down properly, impacting the safety of the entire system. Summary of the Invention

[0004] The present invention aims to, for example, provide a method, apparatus, electronic device, and storage medium for feathering wind turbines that can at least partially solve the aforementioned technical problems.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, embodiments of the present invention provide a wind turbine feathering method, applied to a wind turbine controller, wherein the wind turbine further includes three blades; the method includes:

[0007] When the wind turbine enters the feathering state, the blade state information of each blade is acquired, and the blade state information is used to determine whether there is a target blade that is stuck.

[0008] If so, then obtain the environmental parameters, and determine whether the reverse feathering condition has been met based on the environmental parameters;

[0009] If the reverse feathering condition is met, the target blade is controlled to feather in the reverse direction to the target position; wherein, the target position is the position that each blade needs to reach in the feathering state.

[0010] Optionally, the blade state information includes feathering rate and feathering duration, and the step of determining whether there is a target blade experiencing jamming among the blades based on the blade state information includes:

[0011] Based on the preset blade angle change value calculation formula, the blade angle change value of each blade is obtained according to the feathering rate and the feathering duration of each blade.

[0012] Determine whether the change value of each blade angle is less than a preset change value;

[0013] If so, the blade whose blade angle change value is less than the preset change value is determined as the target blade;

[0014] The formula for calculating the preset blade angle change value is:

[0015] Δθ=ω*Δt

[0016] Where θ is the change in blade angle, ω is the feathering rate, and t is the feathering duration.

[0017] Optionally, the blade status information further includes the pitch motor power and pitch motor current, and the step of determining whether there is a target blade experiencing jamming among the blades based on the blade status information further includes:

[0018] Determine whether the power of the pitch motor corresponding to each blade is overloaded, and determine whether the current of the pitch motor corresponding to each blade is overcurrent;

[0019] If the pitch motor power is overloaded and / or the pitch motor current is overcurrent, the blade experiencing the pitch motor power overload and / or pitch motor current overcurrent is identified as the target blade.

[0020] Optionally, the environmental parameters include wind speed and vibration values; the step of determining whether the reverse feathering condition has been met based on the environmental parameters includes:

[0021] Determine whether the wind speed is within a preset wind speed range and whether the vibration value is within a preset vibration value range.

[0022] If the wind speed is within the preset wind speed range and the vibration value is within the preset vibration value range, then it is determined that the reverse feathering condition has been met.

[0023] Optionally, the method further includes:

[0024] If the wind speed is not within the preset wind speed range, and / or the vibration value is within the preset vibration value range, then the wind speed and the vibration value are reacquired after a preset time period until the wind speed is within the preset wind speed range and the vibration value is within the preset vibration value range.

[0025] Optionally, controlling the target blade to feather in the opposite direction to the target position includes:

[0026] Generate a reverse feathering command, and based on the reverse feathering command, control the pitch bearing corresponding to the target blade to rotate in the opposite direction of the feathering state at a preset reverse feathering rate, so as to make the target blade feather in the reverse direction.

[0027] For each target blade, determine whether the target blade feathers in the opposite direction to the target position;

[0028] If so, then control the pitch bearing to stop rotating.

[0029] Optionally, the method further includes:

[0030] Determine whether each of the blades has reached the target position;

[0031] If so, then control the pitch motor of the wind turbine to stop outputting;

[0032] The wind turbine is controlled to enter a shutdown protection state, and a pitch fault information table is generated according to the blade number corresponding to the target blade.

[0033] Secondly, embodiments of the present invention provide a wind turbine feathering device, applied to a controller of a wind turbine, wherein the wind turbine further includes three blades; the wind turbine feathering device includes:

[0034] The blade jamming detection unit is used to acquire the blade state information of each blade when the wind turbine enters the feathering state, and to determine whether there is a target blade that is jammed in each blade based on the blade state information.

[0035] The reverse feathering condition determination unit is used to obtain environmental parameters when there is a target blade that is stuck in the blade, and to determine whether the reverse feathering condition has been met based on the environmental parameters.

[0036] A reverse feathering control unit is used to control the target blade to feather to a target position when the reverse feathering condition is met; wherein, the target position is the position that each blade needs to reach in the feathering state.

[0037] Thirdly, embodiments of the present invention provide an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of any of the methods described above.

[0038] Fourthly, embodiments of the present invention provide a computer-readable storage medium, the computer-readable storage medium including a computer program, wherein the computer program, when executed, controls a server where the computer-readable storage medium is located to implement the steps of any of the methods described above.

[0039] The beneficial effects of the embodiments of the present invention include, for example:

[0040] When a wind turbine enters feathering mode, blade status information is acquired to determine if any blades are stuck. If environmental parameters allow for reverse feathering, the stuck blades are controlled to feather in the opposite direction, thus enabling the blades to reach the target position for normal feathering. This prevents the wind turbine from failing to enter the shutdown protection state due to blade sticking. Attached Figure Description

[0041] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 A block diagram illustrating an electronic device according to an embodiment of the present invention;

[0043] Figure 2 A flowchart illustrating the steps of a wind turbine feathering method provided in an embodiment of the present invention;

[0044] Figure 3 A schematic diagram of blade feathering and counter-feathering provided for an embodiment of the present invention;

[0045] Figure 4 This is a schematic diagram of a wind turbine feathering device provided in an embodiment of the present invention.

[0046] Icons: 100 - Electronic device; 110 - Memory; 120 - Processor; 130 - Communication module; 300 - Wind turbine feathering device; 301 - Pitch jamming detection unit; 302 - Reverse feathering condition detection unit; 303 - Reverse feathering control unit. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0048] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0049] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0050] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0051] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0052] When a fault is triggered, the controller will perform an emergency feathering action, which controls all three blades to feather to a 90° position. At this point, the blades have the smallest force-bearing area, allowing the wind turbine to quickly reduce the rotor speed through air braking, thereby achieving the purpose of safe shutdown.

[0053] Currently, the direction of emergency feathering is generally from the blade zero position to the 90° safe stop position, that is, the feathering rate unit is positive. However, sometimes, due to foreign objects blocking the direction of feathering (in fact, there are cases where the blade connecting bolts are broken and stuck in the direction of feathering), or the pitch bearing is stuck in one direction, the desired jamming phenomenon may occur.

[0054] Paddle jamming in the feathering direction can cause the pitch motor to run under excessive load and shut down for protection. This directly prevents the blades from feathering to the preset 90° safe stop position at the feathering rate. If maintenance personnel cannot arrive on-site in time to handle the situation and return the blades to the safe stop position due to weather or other reasons, the wind turbine will be in a dangerous state for an extended period. During this time, extreme turbulence or gusts can cause the rotor to overspeed, which can damage mechanical components. If multiple blades are jammed in the feathering direction, it may lead to even more serious tower collapse. Current wind turbine control strategies do not take this situation into account or do not adequately consider it, therefore, a self-protection control strategy for this situation is urgently needed.

[0055] Based on the above, embodiments of the present invention provide a method, apparatus, electronic device and storage medium for feathering wind turbine units, which can effectively alleviate the above-mentioned technical problems.

[0056] Please refer to Figure 1This is a block diagram of an electronic device 100 provided in this application. The electronic device 100 can be a data processing device, and this embodiment does not limit this. The electronic device 100 includes a memory 110, a processor 120, and a communication module 130. The memory 110, processor 120, and communication module 130 are electrically connected directly or indirectly to achieve data transmission or interaction. For example, these components can be electrically connected to each other through one or more communication buses or signal lines.

[0057] The memory 110 is used to store programs or data. The memory 110 may be, but is not limited to, random access memory (RAM), read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), etc.

[0058] The processor 120 is used to read / write data or programs stored in memory and to perform corresponding functions.

[0059] The communication module 130 is used to establish a communication connection between the server and other communication terminals through the network, and to send and receive data through the network.

[0060] It should be understood that, Figure 1 The structure shown is only a schematic diagram of the electronic device 100. The electronic device 100 may also include components that are larger than... Figure 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown. Figure 1 The components shown can be implemented using hardware, software, or a combination thereof. This electronic device 100 can be integrated into other devices or configured as a standalone device.

[0061] This invention provides a wind turbine feathering method, applied to a wind turbine controller, wherein the wind turbine further includes three blades. The method includes, as described above... Figure 2 The following steps are shown:

[0062] Step S110: When the wind turbine enters the feathering state, the blade state information of each blade is obtained, and the blade state information is used to determine whether there is a target blade in each blade that is stuck.

[0063] Step S120: If yes, then obtain the environmental parameters and determine whether the reverse feathering condition has been met based on the environmental parameters.

[0064] Step S130: If the reverse feathering condition is met, control the target blade to feather to the target position. The target position is the position that each blade needs to reach in the feathering state.

[0065] In step S110, when the wind turbine enters the feathering state, the blade state information of each blade is obtained, and based on the blade state information, it is determined whether there is a target blade in each blade that is stuck.

[0066] Wind turbines typically enter feathering mode automatically when a fault occurs. At this time, the controller can acquire the status information of each blade of the wind turbine to determine if any blade is jammed, and designate the jammed blade as the target blade. For example, by acquiring the blade angle, if the blade angle does not reach 90° within a set time period, then that blade is identified as the target blade.

[0067] Optionally, the blade state information includes feathering rate and feathering duration, and the step of determining whether there is a target blade experiencing jamming among the blades based on the blade state information includes:

[0068] Based on the preset blade angle change value calculation formula, the blade angle change value of each blade is obtained according to the feathering rate and the feathering duration of each blade.

[0069] Determine whether the change value of each blade angle is less than the preset change value.

[0070] If so, the blade whose blade angle change value is less than the preset change value is determined as the target blade.

[0071] The formula for calculating the preset blade angle change value is:

[0072] Δθ=ω*Δt

[0073] Where θ is the change in blade angle, ω is the feathering rate, and t is the feathering duration.

[0074] As an optional implementation, the feathering rate and feathering duration of each blade can be obtained. The angle change value of the target blade can be calculated using a preset blade angle change value calculation formula, that is, the total angle change of the blade within the feathering duration. The blade angle change value is compared with the preset change value, which can be the change value of the blade from 0° to 90° under normal feathering conditions. If the blade angle change value is less than the preset change value, it means that the blade has not reached the 90° position within the feathering duration according to the set feathering rate, that is, the blade has jammed, and it is identified as the target blade.

[0075] Optionally, the blade status information further includes the pitch motor power and pitch motor current, and the step of determining whether there is a target blade experiencing jamming among the blades based on the blade status information further includes:

[0076] Each blade is determined to have an overload of its corresponding pitch motor power and an overcurrent of its corresponding pitch motor current.

[0077] If the pitch motor power is overloaded and / or the pitch motor current is overcurrent, the blade experiencing the pitch motor power overload and / or pitch motor current overcurrent is identified as the target blade.

[0078] In another alternative implementation, the pitch motor corresponding to each blade in the wind turbine can also be monitored. When blade jamming occurs during feathering, the corresponding pitch motor will experience overcurrent and power overload. If the controller detects overload and / or overcurrent of the pitch motor corresponding to a certain blade during real-time feathering monitoring, it can be considered that the blade corresponding to that pitch motor has jammed, and that blade can be identified as the target blade.

[0079] In step S120, if so, environmental parameters are obtained, and it is determined whether the reverse feathering condition has been met based on the environmental parameters.

[0080] If the controller determines that a target blade exists in the wind turbine's fault state, it needs to acquire environmental parameters using sensors and other devices to determine whether reverse feathering is suitable. For example, if the environmental parameter is wind speed, and a target blade exists, the current wind speed is acquired, and the wind speed magnitude is used to determine whether the conditions for reverse feathering have been met.

[0081] Optionally, the environmental parameters include wind speed and vibration values. The step of determining whether the reverse feathering condition has been met based on the environmental parameters includes:

[0082] Determine whether the wind speed is within a preset wind speed range and whether the vibration value is within a preset vibration value range.

[0083] If the wind speed is within the preset wind speed range and the vibration value is within the preset vibration value range, then it is determined that the reverse feathering condition has been met.

[0084] In one optional implementation, the controller can acquire the current wind speed and the vibration value of the wind turbine as meteorological parameters. If the current wind speed is within a preset wind speed range and the vibration value of the wind turbine is within a preset vibration value range, the controller determines that the reverse feathering condition has been met and begins to feather the target blade.

[0085] Optionally, the method further includes:

[0086] If the wind speed is not within the preset wind speed range, and / or the vibration value is within the preset vibration value range, then the wind speed and the vibration value are reacquired after a preset time period until the wind speed is within the preset wind speed range and the vibration value is within the preset vibration value range.

[0087] If either the wind speed or vibration value is outside the corresponding preset range (including both being outside the corresponding preset range), the controller determines that it is not suitable to control the target blade for reverse feathering. At this time, the controller can reacquire the wind speed and vibration values ​​after a set time (i.e., the preset time) to determine the reverse feathering conditions... until both meet the corresponding preset range, and then reverse feathering control begins.

[0088] In step S130, if the reverse feathering condition is met, the target blade is controlled to reverse feather to the target position; wherein, the target position is the position that each blade needs to reach in the feathering state.

[0089] When the reverse feathering condition is met, the controller starts to control the target blade to rotate in the opposite direction of the feathering from the current position until it rotates to the position required for the forward feathering (i.e., the target position), thus completing the reverse feathering of the target blade.

[0090] For example, forward feathering requires controlling the blade to rotate from 0° to 90°. If the blade jams when it rotates to 60°, then when the reverse feathering condition is met, the controller controls the motor that drives the target blade to rotate from 60° back to 0°, and then rotates in the opposite direction from 0° to 90° to complete the reverse feathering.

[0091] Optionally, controlling the target blade to feather in the opposite direction to the target position includes:

[0092] A reverse feathering command is generated, and based on the reverse feathering command, the pitch bearing corresponding to the target blade is controlled to rotate in the opposite direction of the feathering state at a preset reverse feathering rate, so as to make the target blade feather in the reverse direction.

[0093] For each target blade, determine whether the target blade has reversed its pitch direction to the target position. If so, control the pitch bearing to stop rotating.

[0094] In one alternative implementation, the controller can generate a command to control the pitch bearing to feather in the opposite direction (i.e., a reverse feathering command), controlling the pitch bearing of the target blade to rotate in the opposite direction to the feathering state at a set rate (preset reverse feathering rate), such as... Figure 3 As shown, for example, in feathering mode, the pitch bearing rotates clockwise; in reverse feathering mode, the controller controls the pitch bearing to rotate counterclockwise. When the target blade reaches the target position in reverse feathering, the controller stops the pitch bearing from rotating. Specifically, the controller can determine the duration of reverse pitching based on the change in blade angle from the target position when the target blade is stuck and the preset reverse feathering rate, thereby determining whether the target blade has reached the target position. Additionally, a trigger signal can be generated when the target blade reaches the target position to inform the controller, thus causing the controller to stop the pitch bearing from rotating.

[0095] Optionally, the method further includes:

[0096] Each blade is individually checked to determine whether it has reached the target position. If so, the pitch motor of the wind turbine is controlled to stop outputting power.

[0097] The wind turbine is controlled to enter a shutdown protection state, and a pitch fault information table is generated according to the blade number corresponding to the target blade.

[0098] Once each jammed target blade reaches its target position via reverse feathering, the controller can stop the corresponding pitch motor's output, putting the wind turbine into a shutdown protection state to await operator intervention. Simultaneously, to facilitate troubleshooting and tracing, the controller can generate a corresponding pitch fault information table based on the target blade's blade number, including details such as the jamming time.

[0099] If, after the wind turbine enters the feathering state, none of the wind turbine blades jam and each blade completes feathering normally, the controller can directly control the wind turbine to enter the shutdown protection state.

[0100] Based on the same inventive concept, such as Figure 4As shown in the figure, an embodiment of the present invention provides a wind turbine feathering device 300, applied to the controller of a wind turbine, wherein the wind turbine further includes three blades. The wind turbine feathering device 300 includes:

[0101] The blade jamming detection unit 301 is used to acquire the blade state information of each blade when the wind turbine enters the feathering state, and to determine whether there is a target blade that is jammed among the blades based on the blade state information.

[0102] The reverse feathering condition determination unit 302 is used to obtain environmental parameters when there is a target blade that is stuck in the blade, and to determine whether the reverse feathering condition has been met based on the environmental parameters.

[0103] The reverse feathering control unit 303 is used to control the target blade to feather to a target position when the reverse feathering condition is met. The target position is the position that each blade needs to reach in the feathering state.

[0104] Regarding the aforementioned wind turbine feathering device 300, the specific functions of each unit have been described in detail in the embodiments of the wind turbine feathering method provided in this specification, and will not be elaborated upon here.

[0105] Based on the same inventive concept, embodiments of this invention provide a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any of the aforementioned wind turbine feathering methods.

[0106] The present invention has at least the following beneficial effects:

[0107] When a wind turbine enters feathering mode, blade status information is acquired to determine if any blades are stuck. If environmental parameters allow for reverse feathering, the stuck blades are controlled to feather in the opposite direction, thus enabling the blades to reach the target position for normal feathering. This prevents the wind turbine from failing to enter the shutdown protection state due to blade sticking.

[0108] In the several embodiments provided by this invention, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative; for example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of the invention. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0109] In addition, the functional modules in the various embodiments of the present invention can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0110] If the aforementioned functions are implemented as software functional modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0111] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for feathering a wind turbine, characterized in that, A controller for a wind turbine generator, the wind turbine generator further comprising three blades; the method includes: When the wind turbine enters feathering mode, the blade status information of each blade is acquired. This blade status information includes feathering rate and duration, pitch motor power and pitch motor current. Based on the blade status information, it is determined whether any blade is experiencing blade jamming. This includes: calculating the blade angle change value of each blade based on a preset blade angle change value calculation formula, according to the feathering rate and duration of each blade; determining whether the blade angle change value is less than a preset change value; if so, identifying the blade with the blade angle change value less than the preset change value as the target blade; the preset blade angle change value calculation formula is: Wherein, θ is the blade angle change value, ω is the feathering rate, and t is the feathering duration; and, respectively, it is determined whether the power of the pitch motor corresponding to each blade is overloaded, and whether the current of the pitch motor corresponding to each blade is overcurrent; if the pitch motor power is overloaded, and / or the pitch motor current is overcurrent, then the blade in which the pitch motor power is overloaded and / or the pitch motor current is overcurrent is determined as the target blade; If so, environmental parameters are obtained, including wind speed and vibration values. Based on the environmental parameters, it is determined whether the reverse feathering condition has been met, including: determining whether the wind speed is within a preset wind speed range and whether the vibration value is within a preset vibration value range; if the wind speed is within the preset wind speed range and the vibration value is within the preset vibration value range, then it is determined that the reverse feathering condition has been met. If the wind speed is not within the preset wind speed range and / or the vibration value is within the preset vibration value range, the wind speed and the vibration value will be reacquired after a preset time period until the wind speed is within the preset wind speed range and the vibration value is within the preset vibration value range. If the reverse feathering condition is met, the target blade is controlled to feather in the reverse direction to the target position; wherein, the target position is the position that each blade needs to reach in the feathering state.

2. The wind turbine feathering method as described in claim 1, characterized in that, The control of the target blade to reverse feather to the target position includes: Generate a reverse feathering command, and based on the reverse feathering command, control the pitch bearing corresponding to the target blade to rotate in the opposite direction of the feathering state at a preset reverse feathering rate, so as to make the target blade feather in the reverse direction. For each target blade, determine whether the target blade feathers in the opposite direction to the target position; If so, then control the pitch bearing to stop rotating.

3. The wind turbine feathering method as described in claim 1, characterized in that, The method further includes: Determine whether each of the blades has reached the target position; If so, then control the pitch motor of the wind turbine to stop outputting; The wind turbine is controlled to enter a shutdown protection state, and a pitch fault information table is generated according to the blade number corresponding to the target blade.

4. A wind turbine feathering device, characterized in that, A controller for a wind turbine, the wind turbine also including three blades; the wind turbine feathering device includes: The blade jamming detection unit is used to acquire blade state information for each blade when the wind turbine enters the feathering state. The blade state information includes feathering rate and duration, pitch motor power and pitch motor current. Based on the blade state information, it determines whether there is a target blade experiencing blade jamming. This includes: calculating the blade angle change value for each blade based on a preset blade angle change value calculation formula, according to the feathering rate and feathering duration of each blade; determining whether the blade angle change value is less than a preset change value; if so, identifying the blade with the blade angle change value less than the preset change value as the target blade; the preset blade angle change value calculation formula is: Where θ is the blade angle change value, ω is the feathering rate, and t is the feathering duration; and, it is determined whether the pitch motor power corresponding to each blade is overloaded, and whether the pitch motor current corresponding to each blade is overcurrent; if the pitch motor power is overloaded, and / or the pitch motor current is overcurrent, then the blade experiencing pitch motor power overload and / or pitch motor current overcurrent is identified as the target blade; The reverse feathering condition determination unit is used to acquire environmental parameters, including wind speed and vibration values, when there is a target blade that is stuck among the blades. Based on the environmental parameters, it determines whether the reverse feathering condition has been met, including: determining whether the wind speed is within a preset wind speed range and whether the vibration value is within a preset vibration value range; if the wind speed is within the preset wind speed range and the vibration value is within the preset vibration value range, then it is determined that the reverse feathering condition has been met. If the wind speed is not within the preset wind speed range and / or the vibration value is within the preset vibration value range, the wind speed and the vibration value will be reacquired after a preset time period until the wind speed is within the preset wind speed range and the vibration value is within the preset vibration value range. A reverse feathering control unit is used to control the target blade to feather to a target position when the reverse feathering condition is met; wherein, the target position is the position that each blade needs to reach in the feathering state.

5. An electronic device, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements the steps of the method according to any one of claims 1 to 3.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a computer program, which, when executed, controls the server where the computer-readable storage medium is located to implement the steps of the method according to any one of claims 1 to 3.

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