Safety warning method, device and equipment for wind turbine generator maintenance

Abstract

The application discloses a kind of wind generating set maintenance safety early warning method, device and equipment, belong to wind power generation field.The method comprises: in the case where wind generating set enters shutdown maintenance mode, the state information of blade in wind generating set is acquired;Determine the maintenance type based on the state information of blade;The maintenance influence factor information of wind generating set is acquired;In the case where maintenance influence factor information satisfies the maintenance risk condition corresponding to maintenance type, control auxiliary subsystem in wind generating set to issue first type indication signal, and maintenance risk condition is used to determine that wind generating set exists safety risk.According to the embodiment of the application, safety risk can be reduced.

Description

Technical Field

[0001] This application belongs to the field of wind power generation, and in particular relates to a safety early warning method, device and equipment for the maintenance of wind turbine generator sets. Background Technology

[0002] A wind turbine is a device that converts wind energy into electrical energy. Various malfunctions can occur throughout the lifespan of a wind turbine, requiring maintenance to troubleshoot and repair them. During maintenance, the wind turbine is shut down, and maintenance personnel enter the turbine to perform the work. However, even when the turbine is shut down, certain hazards may still exist within it, potentially affecting the personal safety of maintenance personnel and creating safety risks. Summary of the Invention

[0003] This application provides a safety early warning method, device, and equipment for wind turbine generator maintenance, which can reduce safety risks.

[0004] In a first aspect, embodiments of this application provide a safety early warning method for wind turbine generator maintenance, comprising: when the wind turbine generator enters a shutdown maintenance mode, acquiring the status information of the blades in the wind turbine generator; determining the maintenance type based on the blade status information; acquiring maintenance influencing factor information of the wind turbine generator; and, when the maintenance influencing factor information meets the maintenance risk conditions corresponding to the maintenance type, controlling the auxiliary subsystem in the wind turbine generator to issue a first type of indication signal, wherein the maintenance risk conditions are used to determine that there is a safety risk in the wind turbine generator.

[0005] According to the first aspect of this application, the status information includes the pitch angle. Based on the blade status information, the maintenance type is determined, including: determining whether there is a blade in the wind turbine generator set that is jammed or pitched based on the blade pitch angle; if there is a single blade in the wind turbine generator set that is jammed or pitched, the maintenance type is determined to include jammed maintenance; if there is no blade in the wind turbine generator set that is jammed or pitched, the maintenance type is determined to include non-jammed maintenance.

[0006] According to any of the foregoing embodiments of the first aspect of this application, the maintenance influencing factor information includes real-time wind speed and wind turbine protection monitoring information; when the maintenance type includes a jammed propeller maintenance type, the maintenance risk conditions include: the real-time wind speed is greater than the first maintenance wind speed, and / or, the wind turbine protection monitoring information exceeds the safety threshold range; when the maintenance type includes a non-jammed propeller maintenance type, the maintenance risk conditions include: the real-time wind speed is greater than the second maintenance wind speed, and / or, the wind turbine protection monitoring information exceeds the safety threshold range, wherein the second maintenance wind speed is greater than the first maintenance wind speed.

[0007] According to any of the foregoing embodiments of the first aspect of this application, the wind turbine protection monitoring information includes one or more of the following: wind direction angle, nacelle acceleration, and blade acceleration.

[0008] According to any of the foregoing embodiments of the first aspect of this application, before determining the maintenance type based on the blade status information, the method further includes: determining, based on the status information, whether there are two or more blades in the wind turbine generator set that have jammed or pitched; if there are two or more blades in the wind turbine generator set that have jammed or pitched, issuing a reset control signal, and / or controlling the auxiliary subsystem to issue a second type of indication signal, wherein the reset control signal is used to control the two or more blades that have jammed or pitched to reset, and the weight of the second type of indication signal is lower than that of the first type of indication signal.

[0009] According to any of the foregoing embodiments of the first aspect of this application, the auxiliary subsystem is powered by a power supply line including at least one wind turbine generator component, and before acquiring the status information of the blades in the wind turbine generator, it further includes: detecting and eliminating faults in the wind turbine generator component in the power supply line; acquiring the status information of the blades in the wind turbine generator includes: acquiring the status information when there is no fault in the wind turbine generator component in the power supply line, or when the fault in the wind turbine generator component in the power supply line has been eliminated.

[0010] According to any of the foregoing embodiments of the first aspect of this application, the wind turbine generator components in the power supply line include a nacelle. Detecting and eliminating faults in the wind turbine generator components in the power supply line includes: detecting whether the nacelle has malfunctioned; if the nacelle has malfunctioned, repairing the nacelle to restore it to normal operation; if the nacelle has not malfunctioned or has been restored to normal operation, determining whether the real-time wind speed is greater than the third maintenance wind speed, wherein the third maintenance wind speed is less than the maintenance wind speed in the maintenance risk condition; and if the real-time wind speed is greater than the third maintenance wind speed, issuing a first blocking signal.

[0011] According to any of the foregoing embodiments of the first aspect of this application, the wind turbine generator components in the power supply line include a pitch control unit. Detecting and eliminating faults in the wind turbine generator components in the power supply line includes: locking the rotor of the wind turbine generator; detecting whether the pitch control unit has malfunctioned; if the pitch control unit has malfunctioned, repairing the fault to restore the pitch control unit to normal operation; if the pitch control unit has not malfunctioned or has been restored to normal operation, determining whether the real-time wind speed is greater than the fourth maintenance wind speed, wherein the fourth maintenance wind speed is less than the maintenance wind speed in the maintenance risk condition; and issuing a second blocking signal if the real-time wind speed is greater than the fourth maintenance wind speed.

[0012] According to any of the foregoing embodiments of the first aspect of this application, locking the impeller in a wind turbine generator set includes: determining whether there is a blade jammed based on the pitch angle of the blades of the wind turbine generator set; if there is a blade jammed, adjusting the impeller to the minimum load position and locking the impeller; if there is no blade jammed, adjusting the impeller to any position and locking the impeller.

[0013] Secondly, embodiments of this application provide a safety early warning device for wind turbine generator maintenance, comprising: an information acquisition module for acquiring the status information of the blades in the wind turbine generator when the wind turbine generator enters a shutdown maintenance mode; a maintenance type determination module for determining the maintenance type based on the blade status information; the information acquisition module is also used to acquire maintenance influencing factor information of the wind turbine generator; and a control module for controlling the auxiliary subsystem in the wind turbine generator to issue a first type of indication signal when the maintenance influencing factor information meets the maintenance risk conditions corresponding to the maintenance type, wherein the maintenance risk conditions are used to determine that there is a safety risk in the wind turbine generator.

[0014] Thirdly, embodiments of this application provide a safety early warning device for wind turbine generator maintenance, comprising: a processor and a memory storing computer program instructions; the processor executes the computer program instructions to implement the safety early warning method for wind turbine generator maintenance as described in the first aspect.

[0015] This application provides a safety early warning method, device, and equipment for wind turbine generator maintenance. When a wind turbine generator enters a shutdown maintenance mode, the maintenance type is determined based on the blade status information. If the acquired maintenance influencing factor information of the wind turbine generator meets the maintenance risk conditions corresponding to the maintenance type, it can be determined that there is a safety risk in the wind turbine generator. The auxiliary subsystem in the wind turbine generator is then controlled to issue a first-type indication signal to alert the wind turbine generator to the safety risk, thus preventing maintenance personnel or equipment from entering the wind turbine generator and reducing the safety risk. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A flowchart illustrating a safety early warning method for wind turbine maintenance provided in an embodiment of this application;

[0018] Figure 2 A flowchart of a safety early warning method for wind turbine maintenance provided in another embodiment of this application;

[0019] Figure 3 A flowchart illustrating a safety early warning method for wind turbine maintenance provided in another embodiment of this application;

[0020] Figure 4 A flowchart of a safety early warning method for wind turbine maintenance provided in another embodiment of this application;

[0021] Figure 5 A schematic diagram of the structure of a safety early warning device for wind turbine maintenance provided in an embodiment of this application;

[0022] Figure 6 A schematic diagram of the structure of a safety early warning device for wind turbine maintenance provided in another embodiment of this application;

[0023] Figure 7 A schematic diagram of the structure of a safety early warning device for wind turbine maintenance provided in an embodiment of this application. Detailed Implementation

[0024] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0025] A wind turbine is a device that converts wind energy into electrical energy. Various malfunctions can occur throughout the lifespan of a wind turbine, requiring maintenance to troubleshoot and repair them. During maintenance, the wind turbine is shut down, and maintenance personnel or equipment enter the turbine to perform the work. However, even when the turbine is shut down, certain hazards may still exist within it, potentially endangering the personal safety of maintenance personnel or equipment, thus creating safety risks.

[0026] This application provides a safety early warning method, device, and equipment for wind turbine generator maintenance. When a wind turbine generator enters a shutdown maintenance mode, the maintenance type is determined based on the blade status information. If the acquired maintenance influencing factor information of the wind turbine generator meets the maintenance risk conditions corresponding to the maintenance type, a safety risk can be determined for the wind turbine generator. The auxiliary subsystem in the wind turbine generator is then controlled to issue a first-type indication signal to alert the wind turbine generator to the safety risk, thus preventing maintenance personnel or equipment from entering the wind turbine generator and reducing the safety risk.

[0027] The safety early warning methods, devices, and equipment for wind turbine generator maintenance provided in this application will be described in turn below.

[0028] This application provides a safety early warning method for the maintenance of wind turbine generator sets. Figure 1 A flowchart illustrating a safety early warning method for wind turbine maintenance provided in an embodiment of this application. Figure 1 As shown, the safety early warning method for wind turbine maintenance may include steps S101 to S104.

[0029] In step S101, when the wind turbine generator set enters the shutdown maintenance mode, the status information of the blades in the wind turbine generator set is obtained.

[0030] In the event of a wind turbine malfunction, maintenance is required, necessitating the entry of the wind turbine into a shutdown maintenance mode. In this mode, the wind turbine is shut down and awaiting maintenance. Blade status information characterizes the blade's condition; for example, in shutdown maintenance mode, it indicates whether the blades are experiencing jamming or pitch variations. In some examples, status information includes pitch angle, which can be used to determine the blade's state.

[0031] In step S102, the maintenance type is determined based on the blade status information.

[0032] Based on the blade status information, the maintenance type can be determined. Maintenance types can include jammed blade maintenance and non-jammed blade maintenance. Jammed blade maintenance refers to maintenance of blades that have jammed or pitched. Jammed blade maintenance can be further subdivided into more types, which are not limited here. Non-jammed blade maintenance refers to maintenance of blades that do not involve jamming or pitching, as well as maintenance of blades that have not jammed or pitched. Non-jammed blade maintenance can also be subdivided into more types, which are not limited here. Different maintenance types correspond to different maintenance operations.

[0033] In step S103, information on maintenance influencing factors of wind turbine generator sets is obtained.

[0034] Maintenance influencing factor information characterizes the factors that affect the maintenance of wind turbine generators. This information may include environmental influencing factor information and wind turbine generator stress information. Environmental influencing factor information may include factors in the environment in which the wind turbine generator is located that affect it. Wind turbine generator stress information may include information affecting the stress state of the wind turbine generator. In some examples, maintenance influencing factor information may include real-time wind speed and turbine protection monitoring information. Real-time wind speed refers to the actual wind speed, and turbine protection monitoring information includes information affecting the safety of the wind turbine generator, such as wind direction angle, nacelle acceleration, blade acceleration, etc., but this is not limited to these parameters.

[0035] In step S104, if the maintenance influencing factor information meets the maintenance risk conditions corresponding to the maintenance type, the auxiliary subsystem in the wind turbine generator set is controlled to issue a first type of indication signal.

[0036] Maintenance risk conditions are used to determine the safety risks posed by wind turbine generators. Different maintenance types may correspond to different maintenance risk conditions. If the maintenance influencing factors information meets the maintenance risk conditions corresponding to a specific maintenance type, it indicates that the wind turbine generator poses a safety risk. In this case, there is a significant safety risk for maintenance personnel or equipment entering the wind turbine generator. First-class indicator signals can be used to provide indications or warnings. First-class indicator signals have a higher weight, meaning the safety risk corresponding to a first-class indicator signal is more severe. These signals can be used to warn maintenance personnel or equipment not to enter the wind turbine generator to avoid danger.

[0037] The auxiliary subsystem may include existing components such as display devices and alarms in the wind turbine generator set. In this embodiment, the existing auxiliary subsystem in the wind turbine generator set can be used to issue the first type of indication signal without the need for additional components. In some examples, the auxiliary subsystem already installed in the pitch control cabinet of the wind turbine generator set can be used to issue the first type of indication signal. The first type of indication signal can be used for indication or warning, and may specifically include image signals, sound signals, etc., which are not limited here.

[0038] In this embodiment, when a wind turbine enters a shutdown maintenance mode, the maintenance type is determined based on the blade status information. If the acquired maintenance influencing factor information for the wind turbine meets the maintenance risk conditions corresponding to the maintenance type, a safety risk can be identified. The auxiliary subsystems within the wind turbine then issue a first-type indication signal to alert the system of this safety risk, providing a warning and preventing maintenance personnel or equipment from entering the wind turbine, thereby reducing the safety risk.

[0039] In some embodiments, the status information includes the blade pitch angle, which can be used to determine the maintenance type. Figure 2 A flowchart of a safety early warning method for wind turbine maintenance provided in another embodiment of this application. Figure 2 and Figure 1 The difference is that, Figure 1 Step S102 can be further refined as follows: Figure 2 Steps S1021 to S1023 in the process.

[0040] In step S1021, based on the blade pitch angle, it is determined whether there are blades in the wind turbine generator set that are jammed or pitch-dependent.

[0041] When a wind turbine enters shutdown maintenance mode, the blades should be feathered, meaning the blade pitch angle should be fully feathered. The full feathering angle can be a range of angles, set according to specific scenarios, requirements, and experience, and is not limited here. For example, a full feathering angle could be 90°, 93°, or 95°. If the blade pitch angle is not fully feathered, the blade may jam or become pitched due to environmental factors, misoperation, etc., meaning the wind turbine may have blades that are jammed or have pitched.

[0042] In step S1022, if a single blade of the wind turbine generator is stuck or pitched, the maintenance type is determined to include stuck blade maintenance.

[0043] If only one blade is jammed or pitched, the maintenance type can be determined as jammed maintenance type, which indicates that only the single blade that is jammed or pitched needs maintenance.

[0044] In some examples, maintenance influencing factors include real-time wind speed and turbine protection monitoring information. When the maintenance type includes a stuck propeller maintenance type, maintenance risk conditions may include: real-time wind speed exceeding the first maintenance wind speed, and / or, turbine protection monitoring information exceeding a safety threshold range.

[0045] The first maintenance wind speed is the maximum wind speed that can ensure maintenance safety in a propeller jamming maintenance scenario. It can be set according to specific scenarios, needs, and experience, and is not limited here. A real-time wind speed greater than the first maintenance wind speed indicates that the real-time wind speed is too high, which may cause maintenance safety risks. The safety threshold range is the range of wind turbine protection monitoring information that can ensure maintenance safety in a maintenance scenario. It can be set according to specific scenarios, needs, and experience, and is not limited here. Wind turbine protection monitoring information exceeding the safety threshold range indicates that the current wind turbine protection monitoring information represents an abnormal state of the wind turbine generator, which may cause maintenance safety risks. If either the real-time wind speed is greater than the first maintenance wind speed or the wind turbine protection monitoring information exceeds the safety threshold range, it indicates that a maintenance safety risk will be triggered, requiring indication or warning through a first-type indicator signal.

[0046] In step S1023, if there are no blades in the wind turbine generator set that are jammed or pitch-changing, the maintenance type is determined to include non-jammed maintenance type.

[0047] If no blade jamming or pitch change has occurred, the maintenance type can be determined to include non-jamming maintenance type. Non-jamming maintenance type means that the objects that need maintenance in the wind turbine generator set are not blades and / or blades that have not experienced jamming or pitch change, such as maintaining blades with cracks or blades with corrosion.

[0048] In some examples, maintenance influencing factors include real-time wind speed and turbine protection monitoring information. When the maintenance type includes non-paddle jamming maintenance, maintenance risk conditions include: real-time wind speed exceeding the second maintenance wind speed, and / or, turbine protection monitoring information exceeding safety thresholds.

[0049] The second maintenance wind speed is the maximum wind speed that ensures maintenance safety in non-stuck blade maintenance scenarios. It can be set according to specific scenarios, requirements, and experience, and is not limited here. In stuck blade maintenance scenarios, blades that are stuck or pitched will impose a load on the wind turbine generator, and the wind will also impose a load. In non-stuck blade maintenance scenarios, there are no stuck or pitched blades, and the load imposed on the wind turbine generator by the blades in non-stuck blade maintenance scenarios is much smaller than that in stuck blade maintenance scenarios. Given a fixed total load that ensures safe maintenance of the wind turbine generator, if the load imposed on the wind turbine generator by the blades in non-stuck blade maintenance scenarios is less than that in stuck blade maintenance scenarios, then the maintenance wind speed in non-stuck blade maintenance scenarios, i.e., the second maintenance wind speed, can be further increased, meaning the second maintenance wind speed is greater than the first maintenance wind speed, thereby extending the maintenance wind speed window. A real-time wind speed greater than the second maintenance wind speed indicates that the real-time wind speed is too high, which may pose a safety risk to maintenance. The details of the safety threshold range can be found in the relevant explanations above and will not be repeated here. If either or more of the following conditions are met, it indicates a safety risk to maintenance, requiring indication or warning via a first-class indicator signal: real-time wind speed exceeding the second maintenance wind speed and wind turbine protection monitoring information exceeding the safety threshold range.

[0050] In the above embodiments, the wind turbine protection monitoring information may include one or more of the following: wind direction angle, nacelle acceleration, and blade acceleration. Each of these parameters has its own safety threshold range. The wind direction angle affects the stress on the wind turbine generator set. If the wind direction angle exceeds its corresponding safety threshold range, it indicates that the stress on the wind turbine generator set is abnormal, posing a safety risk. For example, the safety threshold range for the wind direction angle is -20° to 20°. If the wind direction angle exceeds this range, it can be determined that the wind turbine protection monitoring information exceeds the safety threshold range. Nacelle acceleration also reflects the stress on the wind turbine generator set. If the nacelle acceleration exceeds its corresponding safety threshold range, it indicates that the stress on the wind turbine generator set represented by the nacelle acceleration is abnormal, posing a safety risk. For example, the safety threshold range for nacelle acceleration is less than or equal to 0.15g, where g is the acceleration due to gravity. If the nacelle acceleration is greater than 0.15g, it indicates an abnormal stress condition on the wind turbine generator set, which may pose a safety risk. Blade acceleration also reflects the stress condition of the wind turbine generator set. If the blade acceleration exceeds the corresponding safety threshold range, it indicates an abnormal stress condition on the wind turbine generator set, which may pose a safety risk.

[0051] In some embodiments, before determining the maintenance type, it is also possible to detect whether multiple blades are stuck or pitched, and if multiple blades are stuck or pitched, an early warning can be issued and / or the blades can be reset. Figure 3 A flowchart of a safety early warning method for wind turbine maintenance provided in another embodiment of this application. Figure 3 and Figure 1 The difference is that, Figure 3 The safety early warning method for wind turbine maintenance shown may also include steps S105 and S106.

[0052] In step S105, based on the status information, it is determined whether there are two or more blades in the wind turbine generator set that are stuck or pitched.

[0053] The status information includes the pitch angle. If a blade jams or pitches, it indicates that the blade has left a safe position; the position indicated by a full feathering angle is the safe position. For each blade, whether a jam or pitch has occurred can be determined by whether the blade's pitch angle is a full feathering angle. If the blade's pitch angle is not a full feathering angle, the blade may jam or pitch; for details, please refer to the relevant descriptions in the above embodiments.

[0054] In step S106, if there are two or more blades in the wind turbine generator set that are stuck or pitched, a reset control signal is issued, and / or the auxiliary control subsystem issues a second type of indication signal.

[0055] The reset control signal is used to reset two or more blades that have experienced jamming or pitch changes. When two or more blades are jammed or pitched, the reset control signal can be used to reset the blades. Alternatively, the auxiliary subsystem can be controlled to issue a second type of indication signal. The weight of the second type of indication signal is lower than that of the first type of indication signal. This weight represents the severity of the safety risk; that is, the first type of indication signal represents a higher severity of safety risk than the second type. The first type of indication signal can prompt maintenance personnel or equipment to prohibit entry into the wind turbine generator set. The second type of indication signal can indicate that two or more blades experiencing jamming or pitch changes need to be reset. After resetting two or more blades experiencing jamming or pitch changes, step S102 can be executed. If there are no two or more blades experiencing jamming or pitch changes in the wind turbine generator set, step S102 can be executed.

[0056] In the above embodiments, the auxiliary subsystems that issue the first and second type of indication signals are existing auxiliary subsystems in the wind turbine generator set. These auxiliary subsystems can be powered by a power supply line that includes at least one wind turbine generator set component. To ensure that the auxiliary subsystems can issue indication signals normally, before issuing an early warning, such as before obtaining the status information of the blades in the wind turbine generator set, faults in the wind turbine generator set components in the power supply line can be detected and eliminated. If no faults are found in the wind turbine generator set components in the power supply line, or if the faults in the wind turbine generator set components in the power supply line have been eliminated, the status information of the blades in the wind turbine generator set can be obtained, and the safety early warning process can be executed.

[0057] If a component of the wind turbine generator in the power supply line malfunctions, it may cause a power line break, preventing the auxiliary subsystem from issuing warning signals normally. Therefore, the safety warning procedure should be implemented only after the power supply line has been inspected and troubleshooted to further reduce the safety risks of wind turbine generator maintenance and improve the reliability of early warnings for wind turbine generator maintenance.

[0058] In some embodiments, wind turbine components in the power supply line may include a nacelle and / or a pitch control unit. The following description uses an example where wind turbine components in the power supply line include a nacelle and a pitch control unit. Figure 4 A flowchart of a safety early warning method for wind turbine maintenance provided in another embodiment of this application. Figure 4 and Figure 1 The difference is that, Figure 4 The safety early warning method for wind turbine maintenance shown may also include steps S107 to S115.

[0059] In step S107, it is detected whether a malfunction has occurred in the cabin.

[0060] Inspection of the nacelle does not require maintenance personnel or equipment to enter the impeller, therefore, impeller locking is not necessary. The nacelle faults detected here are those that could cause an open circuit in the power supply lines to the auxiliary subsystems. For example, it can detect whether the nacelle is without power.

[0061] In step S108, in the event of a malfunction in the cabin, the malfunction is repaired to restore the cabin to normal operation.

[0062] If a malfunction occurs in the engine room, the malfunction must be repaired to ensure the power supply lines can function properly and the auxiliary subsystems can issue indication signals correctly. If the engine room returns to normal after repair, the malfunction can be considered resolved, and the power supply line to the engine room is functioning normally.

[0063] In step S109, if the nacelle has not malfunctioned or has returned to normal, it is determined whether the real-time wind speed is greater than the third maintenance wind speed.

[0064] If the engine room is fault-free or has returned to normal, it means that the engine room will not affect the power supply to the auxiliary subsystems. The third maintenance wind speed is the maximum wind speed that can guarantee maintenance safety under the current fault-free conditions of the engine room. The third maintenance wind speed is less than the maintenance wind speed in the maintenance risk condition, that is, the third maintenance wind speed is less than the first and second maintenance wind speeds in the above embodiments. The third maintenance wind speed can be set according to specific scenarios, needs, experience, etc., and is not limited here. In some examples, the first maintenance wind speed is V1, the second maintenance wind speed is V2, and the third maintenance wind speed is V3. Then V1 = V3 + ΔV1, V2 = V3 + ΔV2, where ΔV1 < ΔV2. ΔV1 and ΔV2 can be set according to specific scenarios, needs, experience, etc., and are not limited here. For example, ΔV1 = 3 m / s, ΔV2 = 6 m / s.

[0065] In step S110, if the real-time wind speed is greater than the third maintenance wind speed, a first locking signal is issued.

[0066] If the real-time wind speed exceeds the third maintenance wind speed, it indicates a potential safety risk during wind turbine maintenance, triggering a first interlock signal. In some examples, the first interlock signal can be used to prohibit maintenance personnel or equipment from entering the wind turbine to avoid safety risks. In other examples, the first interlock signal can be used to lock the wind turbine's entrance via relevant components or equipment, thereby preventing maintenance personnel or equipment from entering the wind turbine and avoiding safety risks.

[0067] If the real-time wind speed is less than or equal to the third maintenance wind speed, step S111 can be executed to lock the impeller of the wind turbine generator.

[0068] In step S111, the impeller in the wind turbine generator set is locked.

[0069] The pitch control unit is located on the rotor. Before inspecting the pitch control unit, the rotor of the wind turbine generator needs to be locked. After locking the rotor, maintenance personnel or equipment can enter the rotor to perform fault detection on the pitch control unit.

[0070] In some examples, the presence of jammed blades can be determined based on the pitch angle of the wind turbine blades. Specific details regarding determining the presence of jammed blades based on the pitch angle can be found in the relevant descriptions in the above implementation, and will not be repeated here. If jammed blades are present, the impeller is adjusted to the minimum load position and locked. Adjusting the impeller to the minimum load position can be achieved by adjusting the jammed blade to the minimum load azimuth angle, for example, adjusting the jammed blade to a 270° azimuth angle. The presence of jammed blades will impose a load on the wind turbine. With the impeller at the minimum load position, the load on the wind turbine is minimized. Adjusting the impeller to the minimum load position and locking it ensures the safety of the pitch control unit detection.

[0071] If no blades are jammed, adjust the impeller to any position and lock it. Since there are no jammed blades and no load from them on the wind turbine, and the wind turbine itself has a relatively small load, the impeller locking position is not limited. This allows for more flexible selection of the locking position, facilitates quick impeller locking, and reduces the time required to lock the impeller.

[0072] In step S112, it is detected whether the pitch control unit has malfunctioned.

[0073] The pitch control unit faults detected here are those that could potentially cause an open circuit in the power supply lines to the auxiliary subsystems. For example, it can detect whether the pitch control unit is powered down or experiencing other faults. In wind turbine generator sets comprising multiple pitch control units, each pitch control unit can be tested to determine if a fault has occurred in each unit; alternatively, individual pitch control units can be tested to detect faults in specific units. For instance, an individual pitch control unit could include the one housing the auxiliary subsystem, or it could be the first pitch control unit among multiple units; this is not a limitation.

[0074] In step S113, if a pitch control unit malfunctions, the malfunction is repaired to restore the pitch control unit to normal operation.

[0075] If the pitch control unit malfunctions, it needs to be repaired to ensure the power supply line can deliver power normally and the auxiliary subsystem can issue indication signals correctly. If the pitch control unit returns to normal after repair, the fault can be considered resolved, and the power supply line to the pitch control unit is normal.

[0076] In step S114, if the pitch control unit has not malfunctioned or has returned to normal, it is determined whether the real-time wind speed is greater than the fourth maintenance wind speed.

[0077] If the pitch control unit has not malfunctioned or has returned to normal operation, it means that the pitch control unit will not affect the power supply to the auxiliary subsystem. The fourth maintenance wind speed is the maximum wind speed that can guarantee maintenance safety when the pitch control unit is currently fault-free. The fourth maintenance wind speed is less than the maintenance wind speed in the maintenance risk condition, that is, the fourth maintenance wind speed is less than the first and second maintenance wind speeds in the above embodiments. The fourth maintenance wind speed can be set according to specific scenarios, needs, experience, etc., and is not limited here. In some examples, the first maintenance wind speed is V1, the second maintenance wind speed is V2, and the fourth maintenance wind speed is V4. Then V1 = V4 + ΔV3, V2 = V4 + ΔV4, where ΔV3 < ΔV4. ΔV3 and ΔV4 can be set according to specific scenarios, needs, experience, etc., and are not limited here. For example, ΔV3 = 3 m / s, ΔV4 = 6 m / s.

[0078] In some embodiments, the safety warning process described above can be executed if the pitch control unit has not malfunctioned or has returned to normal operation.

[0079] In step S115, if the real-time wind speed is greater than the fourth maintenance wind speed, a second locking signal is issued.

[0080] If the real-time wind speed exceeds the fourth maintenance wind speed, it indicates a potential safety risk during wind turbine maintenance, triggering a second interlocking signal. In some examples, the second interlocking signal can be used to prohibit maintenance personnel or equipment from entering the wind turbine to avoid safety risks. In other examples, the second interlocking signal can be used to lock the wind turbine's entrance via relevant components or equipment, thereby preventing maintenance personnel or equipment from entering the wind turbine and avoiding safety risks.

[0081] When the real-time wind speed is less than or equal to the fourth maintenance wind speed, the safety warning process described in the above embodiments can be executed.

[0082] This application also provides a safety early warning device for the maintenance of wind turbine generator sets. Figure 5 This is a schematic diagram of a safety early warning device for wind turbine maintenance provided in one embodiment of this application. Figure 5As shown, the safety early warning device 200 for wind turbine maintenance may include an information acquisition module 201, a maintenance type determination module 202, and a control module 203.

[0083] The information acquisition module 201 can be used to acquire the status information of the blades in the wind turbine generator set when the wind turbine generator set enters the shutdown maintenance mode.

[0084] The maintenance type determination module 202 can be used to determine the maintenance type based on the blade status information.

[0085] The information acquisition module 201 can also be used to acquire information on maintenance influencing factors of wind turbine generator sets.

[0086] The control module 203 can be used to control the auxiliary subsystem in the wind turbine to issue a first type of indication signal when the maintenance influencing factor information meets the maintenance risk conditions corresponding to the maintenance type.

[0087] The maintenance risk condition is used to determine whether there is a safety risk to the wind turbine generator set.

[0088] In this embodiment, when a wind turbine enters a shutdown maintenance mode, the maintenance type is determined based on the blade status information. If the acquired maintenance influencing factor information for the wind turbine meets the maintenance risk conditions corresponding to the maintenance type, a safety risk can be identified. The auxiliary subsystems within the wind turbine then issue a first-type indication signal to alert the system of this safety risk, providing a warning and preventing maintenance personnel or equipment from entering the wind turbine, thereby reducing the safety risk.

[0089] In some embodiments, the status information includes the pitch angle. The maintenance type determination module 202 can be used to: determine whether there is a blade in the wind turbine generator set that is jammed or pitched based on the blade's pitch angle; if there is a single blade in the wind turbine generator set that is jammed or pitched, determine that the maintenance type includes jammed maintenance type; if there is no blade in the wind turbine generator set that is jammed or pitched, determine that the maintenance type includes non-jammed maintenance type.

[0090] In some embodiments, the maintenance of influencing factor information includes real-time wind speed and wind turbine protection monitoring information.

[0091] When the maintenance type includes propeller jamming maintenance, the maintenance risk conditions include: the real-time wind speed is greater than the first maintenance wind speed, and / or the wind turbine protection monitoring information exceeds the safety threshold range.

[0092] When the maintenance type includes non-paddle jamming maintenance, the maintenance risk conditions include: the real-time wind speed is greater than the second maintenance wind speed, and / or, the wind turbine protection monitoring information exceeds the safety threshold range. Specifically, the second maintenance wind speed is greater than the first maintenance wind speed.

[0093] In some examples, wind turbine protection monitoring information includes one or more of the following: wind direction angle, nacelle acceleration, and blade acceleration.

[0094] In some embodiments, the maintenance type determination module 202 can also be used to determine, based on status information, whether there are two or more blades in the wind turbine generator set that are jammed or pitched.

[0095] The control module 203 can also be used to issue a reset control signal and / or control the auxiliary subsystem to issue a second type of indication signal when there are two or more blades in the wind turbine generator set that are stuck or pitched.

[0096] The reset control signal is used to reset two or more blades that have jammed or pitched. The weight of the second type of indication signal is lower than that of the first type of indication signal.

[0097] In some embodiments, the auxiliary subsystem is powered by a power supply line that includes at least one wind turbine generator component. Figure 6 A schematic diagram of the structure of a safety early warning device for wind turbine maintenance provided in another embodiment of this application. Figure 6 and Figure 5 The difference is that, Figure 6 The safety early warning device 200 for wind turbine maintenance shown also includes a fault detection module 204.

[0098] The fault detection module 204 can be used to detect and eliminate faults in wind turbine components in the power supply line before acquiring the status information of the blades in the wind turbine.

[0099] The information acquisition module 201 can be used to acquire status information when there is no fault in the wind turbine generator components in the power supply line, or when the fault in the wind turbine generator components in the power supply line has been eliminated.

[0100] In some examples, the wind turbine components in the power supply line include the nacelle.

[0101] The fault detection module 204 can be used to: detect whether a fault has occurred in the engine room; repair the fault in the engine room and restore the engine room to normal operation if a fault has occurred in the engine room or the engine room has been restored to normal operation; determine whether the real-time wind speed is greater than the third maintenance wind speed if the third maintenance wind speed is less than the maintenance wind speed in the maintenance risk condition if the real-time wind speed is greater than the third maintenance wind speed; and issue a first locking signal if the real-time wind speed is greater than the third maintenance wind speed.

[0102] In some examples, wind turbine components in the power supply line include pitch control cabinets.

[0103] The fault detection module 204 can be used to: lock the rotor of the wind turbine generator set; detect whether the pitch control unit has malfunctioned; repair the pitch control unit in the event of a pitch control unit malfunction to restore it to normal operation; determine whether the real-time wind speed is greater than the fourth maintenance wind speed when the pitch control unit has not malfunctioned or has been restored to normal operation, and the fourth maintenance wind speed is less than the maintenance wind speed in the maintenance risk condition; and issue a second interlocking signal when the real-time wind speed is greater than the fourth maintenance wind speed.

[0104] In some examples, the fault detection module 204 can be used to: determine whether there is a stuck blade based on the pitch angle of the wind turbine blades; if there is a stuck blade, adjust the impeller to the minimum load position and lock the impeller; if there is no stuck blade, adjust the impeller to any position and lock the impeller.

[0105] This application also provides a safety early warning device for the maintenance of wind turbine generator sets. Figure 7 This is a schematic diagram of a safety early warning device for wind turbine maintenance provided in one embodiment of this application. Figure 7 As shown, the safety early warning device 300 for wind turbine maintenance includes a memory 301, a processor 302, and a computer program stored in the memory 301 and capable of running on the processor 302.

[0106] In one example, the processor 302 described above may include a central processing unit (CPU), or an application-specific integrated circuit (ASIC), or one or more integrated circuits that may be configured to implement the embodiments of this application.

[0107] Memory 301 may include read-only memory (ROM), random access memory (RAM), disk storage media device, optical storage media device, flash memory device, electrical, optical, or other physical / tangible memory storage device. Therefore, typically, memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the safety warning method for wind turbine maintenance according to embodiments of this application.

[0108] The processor 302 reads the executable program code stored in the memory 301 to run the computer program corresponding to the executable program code, so as to implement the safety early warning method for wind turbine maintenance in the above embodiment.

[0109] In one example, the safety early warning device 300 for wind turbine maintenance may also include a communication interface 303 and a bus 304. For example, Figure 7 As shown, the memory 301, processor 302, and communication interface 303 are connected through bus 304 and complete communication with each other.

[0110] The communication interface 303 is mainly used to realize communication between various modules, devices, units and / or equipment in the embodiments of this application. Input devices and / or output devices can also be connected through the communication interface 303.

[0111] Bus 304 includes hardware, software, or both, that couples the components of the safety warning device 300 for wind turbine maintenance together. For example, and not limitingly, bus 304 may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hyper Transport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an Infinite Bandwidth Interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-E) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local Bus (VLB) bus, or other suitable buses, or a combination of two or more of these. Where appropriate, bus 304 may include one or more buses. Although specific buses are described and illustrated in the embodiments of this application, this application considers any suitable bus or interconnection.

[0112] This application also provides a computer-readable storage medium storing computer program instructions. When these computer program instructions are executed by a processor, they can implement the safety early warning method for wind turbine maintenance described in the above embodiments and achieve the same technical effect. To avoid repetition, further details are omitted here. The aforementioned computer-readable storage medium may include non-transitory computer-readable storage media, such as read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks, etc., and is not limited thereto.

[0113] This application also provides a computer program product in which the instructions are executed by the processor of an electronic device, causing the electronic device to perform the safety early warning method for wind turbine maintenance in the above embodiments, and achieving the same technical effect. For details, please refer to the relevant descriptions in the above embodiments. To avoid repetition, they will not be repeated here.

[0114] It should be clarified that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. For the device embodiments, equipment embodiments, computer-readable storage medium embodiments, and computer program product embodiments, the relevant parts can be referred to the description section of the method embodiments. This application is not limited to the specific steps and structures described above and shown in the figures. Those skilled in the art can make various changes, modifications, and additions, or change the order of steps, after understanding the spirit of this application. Furthermore, for the sake of brevity, detailed descriptions of known methods and techniques are omitted here.

[0115] The aspects of this application have been described above with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It should be understood that each block in the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine such that these instructions, executable via the processor of the computer or other programmable data processing apparatus, enable the implementation of the functions / actions specified in one or more blocks of the flowchart illustrations and / or block diagrams. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field-programmable logic circuit. It is also understood that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can also be implemented by dedicated hardware performing the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0116] Those skilled in the art will understand that the above embodiments are exemplary and not restrictive. Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Based on a study of the drawings, specification, and claims, those skilled in the art should be able to understand and implement other variations of the disclosed embodiments. In the claims, the term "comprising" does not exclude other means or steps; the quantifier "a" does not exclude a plurality; the terms "first" and "second" are used to identify names and not to indicate any particular order. No reference numerals in the claims should be construed as limiting the scope of protection. The functionality of multiple parts appearing in the claims can be implemented by a single hardware or software module. The appearance of certain technical features in different dependent claims does not mean that these technical features cannot be combined to achieve beneficial effects.

Claims

1. A safety early warning method for the maintenance of wind turbine generator sets, characterized in that, include: When the wind turbine generator set enters the shutdown maintenance mode, the status information of the blades in the wind turbine generator set is obtained, and the status information includes the blade pitch angle. Based on the status information of the blades, the maintenance type is determined; Obtain information on factors affecting the maintenance of wind turbine generator sets; When the maintenance influencing factor information meets the maintenance risk conditions corresponding to the maintenance type, the auxiliary subsystem in the wind turbine generator set is controlled to issue a first type of indication signal. The maintenance risk conditions are used to determine that there is a safety risk in the wind turbine generator set. The first type of indication signal is used to remind maintenance personnel or maintenance equipment to prohibit entry into the wind turbine generator set. The determination of the maintenance type based on the blade's status information includes: Based on the blade pitch angle, determine whether there are any blades in the wind turbine generator set that are stuck or pitched. In the case where a single blade of the wind turbine generator is stuck or pitched, the maintenance type is determined to include the stuck blade maintenance type. If the wind turbine does not have blades that are jammed or pitched, the maintenance type is determined to include non-jammed maintenance type. The maintenance influencing factors information includes real-time wind speed and wind turbine protection monitoring information, which includes wind direction angle, nacelle acceleration and blade acceleration. When the maintenance type includes the propeller jamming maintenance type, the maintenance risk conditions include: the real-time wind speed is greater than the first maintenance wind speed and the wind turbine protection monitoring information exceeds the safety threshold range; When the maintenance type includes the non-paddle jamming maintenance type, the maintenance risk conditions include: the real-time wind speed is greater than the second maintenance wind speed and the wind turbine protection monitoring information exceeds the safety threshold range, wherein the second maintenance wind speed is greater than the first maintenance wind speed; Before determining the maintenance type based on the blade's status information, the method further includes: Based on the status information, determine whether there are two or more blades in the wind turbine generator set that are stuck or pitched; If two or more blades in the wind turbine generator set are experiencing jamming or pitch variation, a reset control signal is issued, and / or the auxiliary subsystem is controlled to issue a second type of indication signal. The reset control signal is used to control the reset of two or more blades that have jammed or pitched, and the second type of indication signal is used to indicate that the two or more blades that have jammed or pitched need to be reset.

2. The method according to claim 1, characterized in that, The weight of the second type of indicator signal is lower than that of the first type of indicator signal.

3. The method according to claim 1, characterized in that, The auxiliary subsystem is powered by a power supply line that includes at least one wind turbine generator component. Before obtaining the state information of the blades in the wind turbine generator set, the process also includes: Inspect and troubleshoot faults in the wind turbine components of the power supply line; The step of obtaining the state information of the blades in the wind turbine generator set includes: The status information is obtained when there is no fault in the wind turbine generator components in the power supply line, or when the fault in the wind turbine generator components in the power supply line has been eliminated.

4. The method according to claim 3, characterized in that, The wind turbine components in the power supply line include a nacelle. The detection and troubleshooting of faults in the wind turbine generator components of the power supply line includes: To detect whether the cabin has malfunctioned; In the event of a malfunction in the cabin, the malfunction will be repaired to restore the cabin to normal operation. If the engine room does not malfunction or the engine room has returned to normal, determine whether the real-time wind speed is greater than the third maintenance wind speed, wherein the third maintenance wind speed is less than the maintenance wind speed in the maintenance risk condition; If the real-time wind speed is greater than the third maintenance wind speed, a first locking signal is issued.

5. The method according to claim 3, characterized in that, The wind turbine generator components in the power supply line include a pitch control unit. The detection and troubleshooting of faults in the wind turbine generator components of the power supply line includes: Lock the impeller of the wind turbine generator set; Check if the pitch control unit is malfunctioning; In the event of a malfunction in the pitch control unit, the malfunction will be repaired to restore the pitch control unit to normal operation. If the pitch control unit does not malfunction or has returned to normal, determine whether the real-time wind speed is greater than the fourth maintenance wind speed, wherein the fourth maintenance wind speed is less than the maintenance wind speed in the maintenance risk condition. If the real-time wind speed is greater than the fourth maintenance wind speed, a second locking signal is issued.

6. The method according to claim 5, characterized in that, Locking the rotor in the wind turbine generator set includes: Based on the pitch angle of the blades of the wind turbine generator set, determine whether there is a blade that is jammed; If any of the blades are stuck, adjust the impeller to the minimum load position and lock the impeller. If no blade is stuck, adjust the impeller to any position and lock the impeller.

7. A safety early warning device for wind turbine generator maintenance, characterized in that, include: The information acquisition module is used to acquire the status information of the blades in the wind turbine generator set when the wind turbine generator set enters the shutdown maintenance mode. The status information includes the blade pitch angle. The maintenance type determination module is used to determine the maintenance type based on the status information of the blade; The information acquisition module is also used to acquire information on maintenance influencing factors of wind turbine generator sets; The control module is used to control the auxiliary subsystem in the wind turbine to issue a first type of indication signal when the maintenance influencing factor information meets the maintenance risk conditions corresponding to the maintenance type. The maintenance risk conditions are used to determine that there is a safety risk in the wind turbine. The first type of indication signal is used to remind maintenance personnel or maintenance equipment to prohibit entry into the wind turbine. The maintenance type determination module is used to: determine whether there is a blade in the wind turbine generator set that is jammed or pitched based on the blade's pitch angle; if there is a single blade in the wind turbine generator set that is jammed or pitched, determine that the maintenance type includes jammed maintenance type; if there is no blade in the wind turbine generator set that is jammed or pitched, determine that the maintenance type includes non-jammed maintenance type. The maintenance influencing factors information includes real-time wind speed and wind turbine protection monitoring information, which includes wind direction angle, nacelle acceleration and blade acceleration. When the maintenance type includes the propeller jamming maintenance type, the maintenance risk conditions include: the real-time wind speed is greater than the first maintenance wind speed and the wind turbine protection monitoring information exceeds the safety threshold range; When the maintenance type includes the non-paddle jamming maintenance type, the maintenance risk conditions include: the real-time wind speed is greater than the second maintenance wind speed and the wind turbine protection monitoring information exceeds the safety threshold range, wherein the second maintenance wind speed is greater than the first maintenance wind speed; Before determining the maintenance type based on the blade's status information, the maintenance type determination module is also used to determine, based on the status information, whether there are two or more blades in the wind turbine generator set that have experienced jamming or pitch changes. The control module is also configured to: issue a reset control signal when there are two or more blades in the wind turbine generator set that are jammed or pitched, and / or control the auxiliary subsystem to issue a second type of indication signal, wherein the reset control signal is used to control the two or more blades that are jammed or pitched to be reset, and the second type of indication signal is used to indicate that the two or more blades that are jammed or pitched need to be reset.

8. A safety early warning device for wind turbine generator maintenance, characterized in that, include: Processor and memory storing computer program instructions; When the processor executes the computer program instructions, it implements the safety early warning method for wind turbine maintenance as described in any one of claims 1 to 6.

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