Wind turbine generator feathering method and device, electronic equipment and storage medium

Abstract

The embodiment of the invention provides a wind turbine generator feathering method and device, electronic equipment and a storage medium, and relates to the technical field of wind power equipment. The method is applied to a controller of the wind turbine generator, and the wind turbine generator further comprises three blades. The method comprises the steps that when the wind turbine generator enters a feathering state, blade state information of each blade is obtained, and whether or not a target blade subjected to paddle clamping exists in the blades is judged based on the blade state information. If yes, environmental parameters are obtained, and whether the reverse feathering condition is met or not is judged based on the environmental parameters. And if the reverse feathering condition is met, the target blade is controlled to be reversely feathered to the target position. Wherein the target position is the position where each blade needs to reach in the feathering state. According to the method, when feathering and clamping faults happen to the blades of the wind turbine generator, the blades can be rapidly controlled to reach the safe positions, and therefore the wind turbine generator can be normally shut down.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power equipment, and in particular to a wind turbine generator set feathering method, device, electronic equipment and storage medium. Background Art

[0002] Wind power accounts for a large proportion of clean energy. Most wind power is obtained by converting the kinetic energy of wind energy into electrical energy through wind turbines. In emergency situations such as failures, wind turbines will feather all blades to a 90° position to minimize the force on the blades, allowing the wind turbine to quickly reduce the impeller speed through air braking to shut down the wind turbine for maintenance.

[0003] However, the blades may get stuck during the feathering process and cannot be smoothly retracted to the safe stop position, which makes the wind turbine unable to shut down normally and affects the safety of the entire system. Summary of the invention

[0004] The objectives of the present invention include, for example, providing a wind turbine propeller feathering method, device, electronic device and storage medium, which can at least partially solve the above-mentioned technical problems.

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

[0006] In a first aspect, an embodiment of the present invention provides a wind turbine feathering method, which is applied to a controller of a wind turbine, wherein the wind turbine further includes three blades; the method includes:

[0007] When the wind turbine generator system enters a feathering state, blade status information of each blade is obtained respectively, and based on the blade status information, it is determined whether there is a target blade that is stuck among the blades;

[0008] If yes, then obtaining environmental parameters, and determining whether the reverse feathering condition is met based on the environmental parameters;

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

[0010] Optionally, the blade status information includes a feathering rate and a feathering duration, and judging whether there is a target blade with a stuck blade among the blades based on the blade status information includes:

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

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

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

[0014] The preset blade angle change value calculation formula is:

[0015] Δθ=ω*Δt

[0016] Among them, θ is the blade angle change, ω is the feathering rate, and t is the feathering time.

[0017] Optionally, the blade status information further includes pitch motor power and pitch motor current, and judging whether there is a target blade that is stuck among the blades based on the blade status information further includes:

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

[0019] If the power of the pitch motor is overloaded and / or the current of the pitch motor is overcurrent, the blade where the power of the pitch motor is overloaded and / or the current of the pitch motor is overcurrent is determined as the target blade.

[0020] Optionally, the environmental parameters include wind speed and vibration values; and judging whether the reverse feathering condition is met based on the environmental parameters includes:

[0021] respectively determining 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, it is determined that the reverse feathering condition is met.

[0023] Optionally, the method further comprises:

[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, 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 reverse feather to a target position comprises:

[0026] generating a reverse feathering instruction, and based on the reverse feathering instruction, controlling the pitch bearing corresponding to the target blade to rotate in a direction opposite to the feathering state at a preset reverse feathering rate, so as to reverse feather the target blade;

[0027] For each of the target blades, determining whether the target blade is reverse feathered to the target position;

[0028] If so, the pitch bearing is controlled to stop rotating.

[0029] Optionally, the method further comprises:

[0030] Determining whether each of the blades reaches the target position;

[0031] If yes, controlling the variable pitch motor of the wind turbine set to stop output;

[0032] The wind turbine generator set 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] In a second aspect, an embodiment of the present invention provides a wind turbine propeller feathering device, which is applied to a controller of a wind turbine, wherein the wind turbine further comprises three blades; the wind turbine propeller feathering device comprises:

[0034] a pitch sticking judgment unit, configured to respectively obtain blade status information of each of the blades when the wind turbine generator set enters a feathering state, and judge whether there is a target blade that has pitch sticking among the blades based on the blade status information;

[0035] a reverse feathering condition judgment unit, configured to obtain environmental parameters when there is a target blade that is stuck among the blades, and judge whether the reverse feathering condition is met based on the environmental parameters;

[0036] A reverse feathering control unit is used to control the target blade to reverse 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] In a third aspect, an embodiment of the present invention provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any one of the above methods when executing the program.

[0038] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium includes a computer program, and when the computer program is executed, the server where the computer-readable storage medium is located is controlled to implement the steps of any one of the above methods.

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

[0040] When the wind turbine enters the feathering state, it is determined whether any blade is stuck by obtaining blade status information, and when the environmental parameters allow reverse feathering, the stuck blade is controlled to reverse feather, so that the blade can reach the target position of normal feathering, thereby preventing the wind turbine from being unable to enter the shutdown protection state normally due to a stuck blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0042] Figure 1 A block diagram of an electronic device provided by an embodiment of the present invention;

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

[0044] Figure 3 A schematic diagram of blade feathering and reverse feathering provided in an embodiment of the present invention;

[0045] Figure 4 An architectural diagram of a wind turbine propeller 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 generator set propeller-feathering device; 301 - propeller-stuck judgment unit; 302 - reverse propeller-feathering condition judgment unit; 303 - reverse propeller-feathering control unit. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0048] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0050] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0051] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0052] After a fault is triggered, the controller of the wind turbine will perform an emergency feathering action, that is, control all three blades to feather to the 90° position. At this time, the force area of ​​the blades is minimized, allowing the wind turbine to quickly reduce the impeller speed through air braking, thereby achieving the purpose of safe shutdown.

[0053] At present, the direction of emergency propeller feathering is generally to run directly from the blade zero position direction to the 90° safety stop position direction, that is, the propeller feathering rate unit is positive. However, sometimes unexpected propeller sticking may occur in the propeller feathering direction due to foreign matter blockage (actually, the blade connection bolts are broken and stuck in the propeller feathering direction) or one-way sticking of the variable pitch bearing.

[0054] If the blades are stuck in the feathering direction, the variable pitch motor will drag too much load and shut down for protection, which will directly cause the blades to fail to feather to the 90° safe stop position at the preset feathering rate. If the operation and maintenance personnel are unable to arrive at the site in time to handle the situation and retract the blades to the safe stop position due to weather and other reasons, the wind turbine will be in a dangerous state for a long time. During this period, if extreme turbulence or gusts occur, the impeller will overspeed, and in severe cases, it will cause damage to mechanical components. If multiple blades are stuck in the feathering direction, it may cause a more severe tower collapse. This situation is not taken into account or is not fully considered in the current wind turbine control strategy, so there is an urgent need for a self-protection control strategy for this situation.

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

[0056] Please refer to Figure 1, is a block diagram of an electronic device 100 provided by the present application. The electronic device 100 may be a device capable of performing data processing, which is not limited in this embodiment. The electronic device 100 includes a memory 110, a processor 120, and a communication module 130. The memory 110, the processor 120, and the communication module 130. Each component is electrically connected to each other directly or indirectly to achieve data transmission or interaction. For example, these components can be electrically connected to each other via 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, a random access memory (RAM), a read only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), etc.

[0058] The processor 120 is used to read / write data or programs stored in the memory and execute 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 structure of the electronic device 100. The electronic device 100 may also include Figure 1 More or fewer components as shown, or with Figure 1 Different configurations are shown. Figure 1 The components shown in the figure can be implemented by hardware, software or a combination thereof. The electronic device 100 can be arranged in other devices or as an independent device.

[0061] An embodiment of the present invention provides a wind turbine propeller feathering method, which is applied to a controller of a wind turbine, wherein the wind turbine further comprises three blades. The method comprises: Figure 2 The following steps are shown:

[0062] Step S110: When the wind turbine generator system enters the feathering state, blade status information of each blade is obtained respectively, and based on the blade status information, it is determined whether there is a target blade that is stuck among the blades.

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

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

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

[0066] Wind turbines generally enter the feathering state automatically when a fault occurs. At this time, the controller can obtain the blade status information of each blade of the wind turbine to determine whether any blade is stuck and use the stuck blade as the target blade. For example, the angle of the blade is obtained. If the angle of the blade does not reach the 90° position within the set time, the blade is determined to be the target blade.

[0067] Optionally, the blade status information includes a feathering rate and a feathering duration, and judging whether there is a target blade with a stuck blade among the blades based on the blade status information includes:

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

[0069] Determine whether each blade angle change value is less than a 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 preset blade angle change value calculation formula is:

[0072] Δθ=ω*Δt

[0073] Among them, θ is the blade angle change, ω is the feathering rate, and t is the feathering time.

[0074] As an optional implementation, the feathering rate and feathering duration of each blade can be obtained, and the angle change value of the target blade can be calculated by the preset blade angle change value calculation formula, that is, the total angle change of the blade during the feathering duration. The blade angle change value is compared with the preset change value. The preset change value 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 within the feathering duration, the blade still has not reached the 90° position according to the set feathering rate, that is, the blade is stuck, and it is determined as the target blade.

[0075] Optionally, the blade status information further includes pitch motor power and pitch motor current, and judging whether there is a target blade that is stuck among the blades based on the blade status information further includes:

[0076] It is respectively 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.

[0077] If the power of the pitch motor is overloaded and / or the current of the pitch motor is overcurrent, the blade where the power of the pitch motor is overloaded and / or the current of the pitch motor is overcurrent is determined as the target blade.

[0078] In another optional implementation, the pitch motor corresponding to each blade in the wind turbine can also be monitored. When a blade is stuck during the feathering process, the corresponding pitch motor will have overcurrent and power overload. If the controller detects that the pitch motor corresponding to a blade is overloaded and / or overcurrent during the real-time feathering monitoring, it can be considered that the blade corresponding to the pitch motor has a stuck phenomenon, and the blade is determined as the target blade.

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

[0080] If the controller determines that the wind turbine has a target blade in a fault state, it needs to obtain environmental parameters through sensors and other devices, and judge whether it is suitable for reverse feathering according to the environmental parameters. For example, if the environmental parameter is wind speed, if there is a target blade, the current wind speed is obtained, and the reverse feathering condition is judged according to the wind speed.

[0081] Optionally, the environmental parameters include wind speed and vibration value. The determining whether the reverse feathering condition is met based on the environmental parameters includes:

[0082] It is respectively determined 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, it is determined that the reverse feathering condition is met.

[0084] In an optional implementation, the controller may obtain 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 is met and starts reverse feathering the target blade.

[0085] Optionally, the method further comprises:

[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, 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 one of the wind speed or vibration value is not within the corresponding preset range (including both are not within the corresponding preset range), the controller determines that it is not suitable to control the target blade to reverse feather at present. At this time, the controller can re-acquire the wind speed and vibration values ​​after a set time (i.e., preset time) to judge the reverse feathering condition... until both meet the corresponding preset range, and start reverse feathering control.

[0088] In step S130, if the reverse feathering condition is met, the target blade is controlled to reverse feather to a 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 reached, the controller starts to control the target blade to rotate from the current position in the opposite direction of the feathering until it rotates in the reverse direction to the position required for forward feathering (ie, the target position), thereby 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 gets stuck 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 reverse feathering.

[0091] Optionally, controlling the target blade to reverse feather to a target position comprises:

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

[0093] For each target blade, it is determined whether the target blade is reversely feathered to the target position. If so, the variable pitch bearing is controlled to stop rotating.

[0094] In an optional embodiment, the controller may generate an instruction to control the pitch bearing to reverse feather (i.e., reverse feather instruction), and control the pitch bearing of the target blade to rotate in the opposite direction of the feathering state at a set rate (preset reverse feather rate), such as Figure 3 As shown, for example, when the variable pitch bearing rotates clockwise in the feathering state, the controller controls the variable pitch bearing to rotate counterclockwise in the reverse feathering state. When the target blade reverses the feathering to the target position, the controller controls the variable pitch bearing to stop rotating. Specifically, the controller can determine the duration of the reverse pitch change based on the change in blade angle from the target position when each target blade is stuck and the preset reverse feathering rate, and then determine whether the target blade has reached the target position. In addition, a trigger signal can be generated to inform the controller when the target blade reaches the target position, so that the controller controls the variable pitch bearing to stop rotating.

[0095] Optionally, the method further comprises:

[0096] It is determined whether each blade reaches the target position. If so, the variable pitch motor of the wind turbine is controlled to stop outputting.

[0097] The wind turbine generator set 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] When each target blade of the stuck blade reaches the target position through reverse feathering, the controller can control the corresponding variable pitch motor to stop output and control the wind turbine to enter the shutdown protection state to wait for the staff to handle it. At the same time, in order to facilitate the staff to troubleshoot and trace the fault, the controller can generate a corresponding variable pitch fault information table according to the blade number corresponding to the target blade, such as the stuck blade time, etc.

[0099] If, after the wind turbine generator set enters the feathering state, none of the blades of the wind turbine generator set is stuck and each blade has completed the feathering normally, the controller can directly control the wind turbine generator set to enter the shutdown protection state.

[0100] Based on the same inventive concept, Figure 4As shown, the embodiment of the present invention provides a wind turbine propeller feathering device 300, which is applied to a controller of a wind turbine, and the wind turbine also includes three blades. The wind turbine propeller feathering device 300 includes:

[0101] The stuck blade judgment unit 301 is used to obtain blade status information of each blade when the wind turbine enters the feathering state, and judge whether there is a target blade with stuck blade among the blades based on the blade status information.

[0102] The reverse feathering condition judgment unit 302 is used to obtain environmental parameters when there is a target blade with a stuck blade among the blades, and judge whether the reverse feathering condition is met based on the environmental parameters.

[0103] The reverse feathering control unit 303 is used to control the target blade to reverse 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.

[0104] Regarding the above-mentioned wind turbine generator set propeller-feathering device 300, the specific functions of each unit therein have been described in detail in the embodiment of the wind turbine generator set propeller-feathering method provided in this specification, and will not be elaborated here.

[0105] Based on the same inventive concept, an embodiment of the present invention specification provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps of any method of the wind turbine generator set propeller alignment method described above are implemented.

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

[0107] When the wind turbine enters the feathering state, it is determined whether any blade is stuck by obtaining blade status information, and when the environmental parameters allow reverse feathering, the stuck blade is controlled to reverse feather, so that the blade can reach the target position of normal feathering, thereby preventing the wind turbine from being unable to enter the shutdown protection state normally due to a stuck blade.

[0108] In several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present invention. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

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

[0110] If the functions are implemented in the form of software function 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 the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0111] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A wind turbine feathering method, characterized in that: A controller applied to a wind turbine generator set, wherein the wind turbine generator set further comprises three blades; the method comprises: When the wind turbine generator system enters a feathering state, blade status information of each blade is obtained respectively, and based on the blade status information, it is determined whether there is a target blade that is stuck among the blades; If yes, then obtaining environmental parameters, and determining whether the reverse feathering condition is met based on the environmental parameters; If the reverse feathering condition is met, the target blade is controlled to reverse feather to a 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 according to claim 1, characterized in that: The blade status information includes a feathering rate and a feathering duration, and judging whether there is a target blade that is stuck among the blades based on the blade status information includes: Based on a preset blade angle change value calculation formula, according to the feathering rate of each blade and the feathering time, a blade angle change value of each blade is obtained; Determining whether the change value of each blade angle is less than a preset change value; If so, determining the blade whose blade angle change value is less than the preset change value as the target blade; The preset blade angle change value calculation formula is: Δθ=ω*Δt Among them, θ is the blade angle change, ω is the feathering rate, and t is the feathering time.

3. The wind turbine feathering method according to claim 2, characterized in that: The blade status information also includes the power of the pitch motor and the current of the pitch motor. The determining whether there is a target blade that has a stuck blade among the blades based on the blade status information also includes: respectively determining whether the power of the pitch motor corresponding to each blade is overloaded, and determining whether the current of the pitch motor corresponding to each blade is overcurrent; If the power of the pitch motor is overloaded and / or the current of the pitch motor is overcurrent, the blade where the power of the pitch motor is overloaded and / or the current of the pitch motor is overcurrent is determined as the target blade.

4. The wind turbine feathering method according to claim 1, characterized in that: The environmental parameters include wind speed and vibration value; and judging whether the reverse feathering condition is reached based on the environmental parameters includes: respectively 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, it is determined that the reverse feathering condition is met.

5. The wind turbine feathering method according to claim 4, characterized in that: The method further comprises: 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 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.

6. The wind turbine feathering method according to claim 1, characterized in that: The controlling the target blade to reverse feather to a target position comprises: generating a reverse feathering instruction, and based on the reverse feathering instruction, controlling the pitch bearing corresponding to the target blade to rotate in a direction opposite to the feathering state at a preset reverse feathering rate, so as to reverse feather the target blade; For each of the target blades, determining whether the target blade is reverse feathered to the target position; If so, the pitch bearing is controlled to stop rotating.

7. The wind turbine feathering method according to claim 5, characterized in that: The method further comprises: Determining whether each of the blades reaches the target position; If yes, controlling the variable pitch motor of the wind turbine set to stop output; The wind turbine generator set 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.

8. A wind turbine propeller feathering device, characterized in that: A controller applied to a wind turbine generator set, wherein the wind turbine generator set further comprises three blades; and the wind turbine generator set feathering device comprises: a pitch sticking judgment unit, configured to respectively obtain blade status information of each of the blades when the wind turbine generator set enters a feathering state, and judge whether there is a target blade that has pitch sticking among the blades based on the blade status information; a reverse feathering condition judgment unit, configured to obtain environmental parameters when there is a target blade that is stuck among the blades, and judge whether the reverse feathering condition is met based on the environmental parameters; A reverse feathering control unit is used to control the target blade to reverse 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.

9. 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 implements the steps of the method according to any one of claims 1 to 7 when executing the program.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a computer program, and when the computer program is executed, the server where the computer-readable storage medium is located is controlled to implement the steps of the method according to any one of claims 1 to 7.

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