Wind turbine generator paddle control method, device, circuit, terminal and medium

Abstract

The embodiment of the invention relates to the technical field of wind power equipment, and provides a wind turbine generator blade control method and device, a circuit, a terminal and a medium, and the method comprises the steps: obtaining wind turbine generator monitoring data and wind turbine generator attribute data; according to the monitoring data of the wind turbine generator, the state of a first paddle is confirmed; if the first blade state is a blade locking state, extracting a blade wind power safety load value from the attribute data of the wind turbine generator; according to the monitoring data of the wind turbine generator, determining a blade wind power prediction load value; according to a preset blade wind power safety load value and a blade wind power prediction load value, a second blade state is determined; according to the second blade state, determining a target working mode of the blade; and the current working mode of the blades is switched into the target working mode of the blades, the interlocking state of the blades can be relieved according to the product demand information of a user under the extreme working condition that the wind power of the surrounding environment is too large, the blades are changed to the safety angle, and the safety of the wind turbine generator is improved.

Description

Technical Field

[0001] The present application relates to the technical field of wind power equipment, and in particular to a method, device, circuit, terminal and medium for controlling blades of a wind turbine set. Background Art

[0002] As an important part of renewable energy, wind power generation plays an increasingly important role in the global energy structure. As the core equipment of wind power generation, the operating efficiency and safety of wind turbines are directly related to the performance and economic benefits of the entire wind power generation system. However, during the operation of wind turbines, they will be affected by many factors, such as wind speed changes, wind direction changes, blade wear, etc. These factors may cause the blades to bear excessive loads, thereby affecting the stability and safety of wind turbines.

[0003] When the wind turbine pitch control system is shut down for maintenance, the blades will be locked to each other to ensure the safety of maintenance personnel and the stability of the wind turbine. However, even if the blades are interlocked, if the wind force around the wind turbine is too strong, the blade interlock system may fail, resulting in the blades being unable to be effectively locked, which in turn generates excessive loads and causes serious accidents such as wind turbine tower collapse. To avoid such accidents, there needs to be a method to unlock the blades in the interlocked state and change the blades to a safe angle, but there is no such control method on the market yet. Summary of the invention

[0004] The embodiments of the present application provide a method, device, circuit, terminal and medium for controlling the blades of a wind turbine set, which can unlock the pitch system when the pitch system is locked based on the monitoring data and attribute data of the wind turbine set, thereby allowing the blades to be pitched to a safe angle, thereby improving the safety of the wind turbine set.

[0005] A first aspect of an embodiment of the present application provides a method for controlling blades of a wind turbine generator system, the method comprising:

[0006] Obtain wind turbine monitoring data and wind turbine attribute data;

[0007] Confirming the state of the first blade according to the wind turbine monitoring data;

[0008] If the first blade state is a blade locked state, extracting a blade wind safety load value from the wind turbine attribute data;

[0009] Confirming the predicted wind load value of the blades according to the monitoring data of the wind turbine set;

[0010] Confirm the state of the second blade according to the preset blade wind safety load value and the blade wind predicted load value;

[0011] Determining a target operating mode of the blade according to the second blade state;

[0012] The current working mode of the blade is switched to the target working mode of the blade.

[0013] In this example, the variable pitch system is first confirmed to be in a blade locked state through the wind turbine monitoring data, and then the blade wind safety load value is extracted from the wind turbine attribute data. The blade wind predicted load value is confirmed according to the wind turbine monitoring data, and the second blade state is obtained by comparing the wind predicted load value with the blade wind safety load value to confirm whether the currently locked blade can be unlocked. When the second blade state indicates that it can be unlocked, the blade that is not currently at a safe angle is controlled to change its pitch to a safe angle, thereby improving the safety of the wind turbine under extreme conditions of excessive wind in the surrounding environment, and avoiding blade interlocking failure, which may cause excessive load and lead to serious accidents such as wind turbine tower collapse.

[0014] Obtain wind turbine monitoring data and wind turbine attribute data, and then

[0015] Further, confirming the state of the first blade according to the wind turbine monitoring data includes:

[0016] Extracting a blade angle value of a first blade, a blade angle value of a second blade, and a blade angle value of a third blade from the wind turbine monitoring data;

[0017] If the blade angle value of the first blade, the blade angle value of the second blade, and the blade angle value of the third blade are all within the safety angle range, it is confirmed that the first blade is in the unlocked state;

[0018] If one or more of the blade angle values ​​of the first blade, the second blade, and the third blade are not within the safe angle range, it is confirmed that the first blade is in a locked state.

[0019] Further, according to the wind turbine monitoring data, the predicted wind load value of the blades is confirmed, including:

[0020] Extracting historical blade angle values, load values ​​corresponding to the historical blade angle values, and real-time blade angle values ​​from the wind turbine monitoring data;

[0021] Fitting a blade angle-load sinusoidal function curve according to historical blade angle values ​​and load values ​​corresponding to the historical blade angle values;

[0022] According to the blade angle-load sinusoidal function curve, the blade wind force predicted load value corresponding to the real-time blade angle value is confirmed.

[0023] Further, according to the preset blade wind safety load value and the blade wind predicted load value, confirming the second blade state includes:

[0024] If the predicted blade wind load values ​​are all less than the preset blade wind safety load values, confirm that the second blade state is the blade unlocked state;

[0025] If one or more of the predicted blade wind load values ​​is greater than the preset blade wind safety load value, it is confirmed that the second blade state is the blade locked state.

[0026] Further, according to the second blade state, determining a blade target operating mode includes:

[0027] If the second blade state is confirmed to be a blade unlocked state, confirming the blade target operating mode as a variable pitch operating mode;

[0028] If the second blade state is confirmed to be a blade locked state, the blade target operating mode is confirmed to be a locked operating mode.

[0029] A second aspect of the embodiments of the present application provides a wind turbine blade control circuit, which is used to implement the wind turbine blade control method proposed in the first aspect, including:

[0030] Pitch control module;

[0031] A first PMM driver, a first single-pole double-throw switch, a second relay and a third relay, the first signal end of the pitch control module is respectively connected to the signal ends of the first PMM driver, the first single-pole double-throw switch, the second relay and the third relay, the 24V power supply output end of the first PMM driver is connected to the input end of the first single-pole double-throw switch, one port of the first single-pole double-throw switch is connected to the enable signal input end of the first PMM driver, the second port of the first single-pole double-throw switch is connected to the input end of the second relay, the output end of the second relay is connected to the input end of the third relay, and the output end of the third relay is connected to the enable input end of the first PMM driver;

[0032] a second PMM driver, a second single-pole double-throw switch, a first relay and a third relay, the second signal end of the pitch control module is respectively connected to the signal ends of the second PMM driver, the second single-pole double-throw switch, the first relay and the third relay, the 24V power supply output end of the second PMM driver is connected to the input end of the second single-pole double-throw switch, one port of the second single-pole double-throw switch is connected to the enable signal input end of the second PMM driver, two ports of the second single-pole double-throw switch are connected to the input end of the first relay, the output end of the first relay is connected to the input end of the third relay, and the output end of the third relay is connected to the enable input end of the second PMM driver;

[0033] a third PMM driver, a third single-pole double-throw switch, a first relay, and a second relay, the third signal end of the pitch control module is respectively connected to the signal ends of the third PMM driver, the third single-pole double-throw switch, the first relay, and the second relay, the 24V power supply output end of the third PMM driver is connected to the input end of the third single-pole double-throw switch, one port of the third single-pole double-throw switch is connected to the enable signal input end of the third PMM driver, two ports of the third single-pole double-throw switch are connected to the input end of the first relay, the output end of the first relay is connected to the input end of the second relay, and the output end of the second relay is connected to the enable input end of the third PMM driver;

[0034] If the first PMM driver, the first single-pole double-throw switch, the second relay and the third relay form a path, the first relay is closed;

[0035] If the second PMM driver, the second single-pole double-throw switch, the first relay and the third relay form a path, the second relay is closed;

[0036] If the third PMM driver, the third single-pole double-throw switch, the first relay and the second relay form a path, the third relay is closed.

[0037] A third aspect of the embodiments of the present application provides a wind turbine blade control device, the device comprising:

[0038] A first acquisition unit, used to acquire wind turbine monitoring data and wind turbine attribute data;

[0039] A first processing unit, configured to confirm a first blade state according to the wind turbine monitoring data;

[0040] a second acquisition unit, configured to extract a blade wind safety load value from the wind turbine attribute data if the first blade state is a blade locked state;

[0041] A second processing unit is used to confirm the predicted wind load value of the blades according to the monitoring data of the wind turbine set;

[0042] a third processing unit, configured to determine a target operating mode of the blade according to the second blade state;

[0043] The fourth processing unit is used to switch the current working mode of the blade to the target working mode of the blade.

[0044] Further, in the aspect of confirming the state of the first blade according to the monitoring data of the wind turbine generator set, the first processing unit is used to:

[0045] Extracting a blade angle value of a first blade, a blade angle value of a second blade, and a blade angle value of a third blade from the wind turbine monitoring data;

[0046] If the blade angle value of the first blade, the blade angle value of the second blade, and the blade angle value of the third blade are all within the safety angle range, it is confirmed that the first blade is in the unlocked state;

[0047] If one or more of the blade angle values ​​of the first blade, the second blade, and the third blade are not within the safe angle range, it is confirmed that the first blade is in a locked state.

[0048] The fourth aspect of an embodiment of the present application provides a terminal, including a processor, an input device, an output device and a memory, wherein the processor, input device, output device and memory are interconnected, wherein the memory is used to store a computer program, and the computer program includes program instructions, and the processor is configured to call the program instructions to execute the step instructions of the wind turbine blade control method in the first aspect of the embodiment of the present application.

[0049] The fifth aspect of the embodiments of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program enables a computer to execute part or all of the steps described in the wind turbine blade control method in the first aspect of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0051] Figure 1A schematic diagram of the overall process steps of a method for controlling blades of a wind turbine generator system is provided for an embodiment of the present application;

[0052] Figure 2 A schematic diagram of specific steps for confirming the state of a first blade of a wind turbine blade control method is provided for an embodiment of the present application;

[0053] Figure 3 A schematic diagram of specific steps for confirming a predicted wind load value of a blade of a wind turbine blade control method is provided for an embodiment of the present application;

[0054] Figure 4 A schematic diagram of a blade angle-load sinusoidal function curve of a wind turbine blade control method is provided for an embodiment of the present application;

[0055] Figure 5 A structural schematic diagram of a wind turbine blade control circuit is provided for an embodiment of the present application;

[0056] Figure 6 A structural schematic diagram of a wind turbine blade control device is provided for an embodiment of the present application;

[0057] Figure 7 A schematic diagram of the structure of a terminal provided in an embodiment of the present application.

[0058] Reference numerals:

[0059] Blade angle-load sine function curve-A of the first blade, blade angle-load sine function curve-B of the second blade, blade angle-load sine function curve-C of the third blade, variable pitch control module-1, first PMM driver-2, second PMM driver-3, third PMM driver-4, first single-pole double-throw switch-5, second single-pole double-throw switch-6, third single-pole double-throw switch-7, second relay-8, third relay-9, first relay-10, first acquisition unit-11, first processing unit-12, second acquisition unit-13, second processing unit-14, third processing unit-15, fourth processing unit-16. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0061] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0062] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0063] In order to better understand a wind turbine blade control method provided in an embodiment of the present application, the following first briefly introduces the scenario in which the wind turbine blade control method is applied. When the wind turbine blade control system is in a shutdown maintenance state, if the angle of a blade is at an unsafe angle, the blades will be locked with each other, but even if the blades are interlocked, if the surrounding environment of the wind turbine is in an extreme working condition with excessive wind force, the blade interlocking system may fail and fail to lock the blades, resulting in excessive load and even causing the wind turbine tower to collapse. To avoid the above scenario, it is necessary to unlock the locked blades and then change the blades to a safe angle. However, there is currently no control method on the market that can unlock the blades in an interlocked state.

[0064] Figure 1 A schematic diagram of the overall process steps of a wind turbine blade control method is shown in FIG. Figure 1 As shown, the wind turbine blade control method provided by the first aspect of this embodiment includes:

[0065] S1. Obtain wind turbine monitoring data and wind turbine attribute data.

[0066] S2. Confirm the first blade state according to the monitoring data of the wind turbine. It should be noted that the blade state includes an unlocked state and a locked state. When the blade state is in the unlocked state, the blade can change the pitch. When the blade is in the locked state, the blades are locked to each other and the blade cannot change the pitch. In addition, the first blade state refers to whether the current blade is in a locked state. The first blade state here can be the state of the first blade, or the state of the second blade or the third blade. The first blade state is not specified as the state of the first blade, and this embodiment does not limit it. The second blade state in this embodiment is similar, and does not specifically refer to the state of the second blade. Figure 2 A schematic diagram showing the specific steps of confirming the state of a first blade in a method for controlling a blade of a wind turbine generator system is shown as follows: Figure 2 As shown, specifically including:

[0067] S201. Extracting a blade angle value of a first blade, a blade angle value of a second blade, and a blade angle value of a third blade from monitoring data of the wind turbine generator set.

[0068] S202: If the blade angle value of the first blade, the blade angle value of the second blade and the blade angle value of the third blade are all within the safety angle range, confirm that the first blade state is unlocked. Preferably, in this embodiment, the safety angle range of the blade angle value is obtained according to the wind turbine attribute data, and the blade safety angle range is preferably 88° to 100°. When the angles of the first blade, the second blade and the third blade are all within the range of 88° to 100°, the states of the first blade, the second blade and the third blade are confirmed to be unlocked, and the pitch control system can perform pitch control operations on the blades.

[0069] S203: If one or more of the blade angle values ​​of the first blade, the second blade, and the third blade are not within the safe angle range, confirm that the first blade state is locked. When one or more of the blade angle values ​​of the first blade, the second blade, and the third blade are not within the safe angle range, confirm that the blade states of the first blade, the second blade, and the third blade are locked. The scenario of this embodiment requires unlocking the locked state, and after unlocking, adjust the blades that are not at the safe angle to the safe angle.

[0070] S3. If the first blade state is a blade locked state, extracting a blade wind safety load value from the wind turbine generator set attribute data.

[0071] S4. Confirm the predicted wind load value of the blades according to the monitoring data of the wind turbine generator set. Figure 3 A schematic diagram showing the specific steps of confirming the predicted wind load value of the blades of a wind turbine blade control method is shown as follows: Figure 3 As shown, including:

[0072] S401. Extracting historical blade angle values, load values ​​corresponding to the historical blade angle values, and real-time blade angle values ​​from the wind turbine monitoring data.

[0073] S402, fitting a blade angle-load sinusoidal function curve according to historical blade angle values ​​and load values ​​corresponding to the historical blade angle values. Specifically, after obtaining the historical blade angle values ​​and load values ​​corresponding to the historical blade angle values, a blade angle-load corresponding sinusoidal function curve is constructed using the least squares method, such as Figure 4 As shown, a schematic diagram of a blade angle-load sinusoidal function curve of a wind turbine blade control method is provided. In this embodiment, the blade angle-load sinusoidal function curve includes a first blade angle-load corresponding sinusoidal function curve A, a second blade angle-load corresponding sinusoidal function curve B and a third blade angle-load corresponding sinusoidal function curve C. By obtaining the three sinusoidal function curves, the coupling correspondence between the blade load and the blade angle among the three blades can be clearly observed. When the angle of one of the blades is known, the corresponding blade load of the current load can be obtained through the blade angle-load corresponding sinusoidal function curve of the blade.

[0074] S403, confirm the blade wind force prediction load value corresponding to the real-time blade angle value according to the blade angle-load sinusoidal function curve. Since the blade angle-load corresponding sinusoidal function curve is obtained in step S402, the load value corresponding to the current real-time blade angle value can be obtained from the blade angle-load sinusoidal function curve according to the real-time blade angle value, as the blade wind force prediction load value, including the load value corresponding to the real-time first blade angle value, the load value corresponding to the real-time second blade angle value, and the load value corresponding to the real-time third blade angle value.

[0075] S5. Confirm the state of the second blade according to the preset blade wind safety load value and the blade wind predicted load value. Specifically, it includes:

[0076] S501, if the blade wind force prediction load values ​​are all less than the preset blade wind force safety load values, confirm that the second blade state is the blade unlocked state. Specifically, the preset blade wind force safety load value is an attribute parameter extracted from the wind turbine attribute data, that is, the preset safety load value of the wind turbine rotor, including the preset blade wind force safety load value of the first blade, the preset blade wind force safety load value of the second blade, and the preset blade wind force safety load value of the third blade. After obtaining the preset safety load value of the wind turbine rotor, the load value corresponding to the real-time first blade angle value is compared with the preset blade wind force safety load value of the first blade, the load value corresponding to the real-time second blade angle value is compared with the preset blade wind force safety load value of the second blade, and the load value corresponding to the real-time third blade angle value is compared with the preset blade wind force safety load value of the third blade. If the blade wind force prediction load values ​​of the above three groups of blades are all less than the corresponding preset blade wind force safety load values, it is considered that the current pitch operation is allowed to run, that is, it is confirmed that the second blade state is the blade unlocked state.

[0077] S502: If one or more of the predicted blade wind load values ​​are greater than the preset blade wind safety load value, confirm that the second blade state is the blade locked state. Similar to step S501, if one or more of the predicted blade wind load values ​​of the three groups of blades are greater than the corresponding preset blade wind safety load value, it is considered that the current pitch operation is not allowed to be performed, and the risk of the current pitch operation is considered to be greater than the locked state, that is, the second blade state is confirmed to be the blade unlocked state.

[0078] S6. Determine the target working mode of the blade according to the second blade state. Specifically, it includes:

[0079] S601: If the second blade state is confirmed to be the blade unlocked state, the blade target working mode is confirmed to be the variable pitch working mode. In the variable pitch working mode, the blades are no longer locked, and the pitch can be changed.

[0080] S602: If the second blade state is confirmed to be the blade locked state, the blade target working mode is confirmed to be the locked working mode. In the locked working mode, pitch change operation is not allowed, and the blades are still locked.

[0081] S7, switch the current working mode of the blade to the target working mode of the blade. Specifically, when the first blade state is locked and the second blade state is unlocked, the current working mode of the blade is switched to the variable pitch working mode, and the blades that are not within the safe range angle are adjusted to a safe angle, so as to improve the safety of the wind turbine under extreme conditions of excessive wind in the surrounding environment, avoid blade interlock failure, and generate excessive load, leading to serious accidents such as wind turbine tower collapse; when the first blade state is locked and the second blade state is locked and unlocked, the current working mode of the blade is switched to the locked working mode, and the pitch cannot be changed. It is considered that the risk of variable pitch is higher than that of the blade locked state.

[0082] That is, in this embodiment, the pitch control system is first confirmed to be in the blade locked state through the wind turbine monitoring data, and then the blade wind safety load value is extracted from the wind turbine attribute data. The blade wind predicted load value is confirmed according to the wind turbine monitoring data, and the second blade state is obtained by comparing the wind predicted load value with the blade wind safety load value, so as to confirm whether the currently locked blade can be unlocked. When the second blade state indicates that it can be unlocked, the blade that is not currently at a safe angle is controlled to change its pitch to a safe angle, so as to improve the safety of the wind turbine under extreme conditions of excessive wind in the surrounding environment, and avoid the occurrence of blade interlocking failure, which generates excessive load and leads to serious accidents such as wind turbine tower collapse.

[0083] Figure 5 A schematic diagram of a wind turbine blade control circuit is shown, which is used to implement the wind turbine blade control method proposed in the first aspect. Figure 5 As shown, including:

[0084] The pitch control module 1 is used to control the closing and opening of components in this circuit.

[0085] A first PMM driver 2, a first single-pole double-throw switch 5, a second relay 8 and a third relay 9, the first signal end of the pitch control module 1 is respectively connected to the signal ends of the first PMM driver 2, the first single-pole double-throw switch 5, the second relay 8 and the third relay 9, the 24V power supply output end of the first PMM driver 2 is connected to the input end of the first single-pole double-throw switch 5, one port of the first single-pole double-throw switch 5 is connected to the enable signal input end of the first PMM driver 2, the second port of the first single-pole double-throw switch 5 is connected to the input end of the second relay 8, the output end of the second relay 8 is connected to the input end of the third relay 9, and the output end of the third relay 9 is connected to the enable input end of the first PMM driver 2;

[0086] A second PMM driver 3, a second single-pole double-throw switch 6, a first relay 10 and a third relay 9, the second signal end of the pitch control module 1 is respectively connected to the signal ends of the second PMM driver 3, the second single-pole double-throw switch 6, the first relay 10 and the third relay 9, the 24V power supply output end of the second PMM driver 3 is connected to the input end of the second single-pole double-throw switch 6, one port of the second single-pole double-throw switch 6 is connected to the enable signal input end of the second PMM driver 3, the second port of the second single-pole double-throw switch 6 is connected to the input end of the first relay 10, the output end of the first relay 10 is connected to the input end of the third relay 9, and the output end of the third relay 9 is connected to the enable input end of the second PMM driver 3;

[0087] The third PMM driver 4, the third single-pole double-throw switch 7, the first relay 10 and the second relay 8, the third signal end of the pitch control module 1 is respectively connected to the signal ends of the third PMM driver 4, the third single-pole double-throw switch 7, the first relay 10 and the second relay 8, the 24V power supply output end of the third PMM driver 4 is connected to the input end of the third single-pole double-throw switch 7, one port of the third single-pole double-throw switch 7 is connected to the enable signal input end of the third PMM driver 4, the second port of the third single-pole double-throw switch 7 is connected to the input end of the first relay 10, the output end of the first relay 10 is connected to the input end of the second relay 8, and the output end of the second relay 8 is connected to the enable input end of the third PMM driver 4;

[0088] If the first PMM driver 2, the first single-pole double-throw switch 5, the second relay 8 and the third relay 9 form a path, the first relay 10 is closed;

[0089] If the second PMM driver 3, the second single-pole double-throw switch 6, the first relay 10 and the third relay 9 form a path, the second relay 8 is closed;

[0090] If the third PMM driver 4, the third single-pole double-throw switch 7, the first relay 10 and the second relay 8 form a path, the third relay 9 is closed.

[0091] This embodiment is illustrated by taking the sub-circuit formed by the first PMM driver 2, the first single-pole double-throw switch 5, the second relay 8 and the third relay 9 as an example. First, it is explained how this circuit realizes blade locking. When the sub-circuit formed by the first PMM driver 2, the first single-pole double-throw switch 5, the second relay 8 and the third relay 9 does not form a path, the sub-circuit cannot supply power to the enable signal end of the first PMM driver 2. The first PMM driver 2 is associated with all the first relays 10. Only when the pitch control module 1 receives the enable signal of the first PMM driver 2, the pitch control module 1 will give control signals to all the first relays 10 to close the first relays 10.

[0092] Similarly, the three sub-circuits are interrelated. Only when the pitch control module 1 simultaneously receives the enable signals from the first PMM driver 2, the second PMM driver 3 and the third PMM driver 4, can the three circuits be unlocked, thereby achieving mutual locking between the blades.

[0093] Further, it is described how to achieve unlocking, when the pitch control module 1 performs the following steps:

[0094] S1. Obtain wind turbine monitoring data and wind turbine attribute data.

[0095] S2. Confirming the state of the first blade according to the monitoring data of the wind turbine generator system.

[0096] S3. If the first blade state is a blade locked state, extracting a blade wind safety load value from the wind turbine generator set attribute data.

[0097] S4. Confirm the predicted wind load value of the blades according to the monitoring data of the wind turbine generator set.

[0098] S5. Confirm the state of the second blade according to the preset blade wind safety load value and the blade wind predicted load value.

[0099] S6. Confirming a target operating mode of the blade according to the second blade state.

[0100] S7: Switch the current working mode of the blade to the target working mode of the blade.

[0101] And in step S7, the current working mode of the blade is switched to the variable pitch working mode. When switching from the blade interlocking mode to the variable pitch working mode, the first relay 10, the second relay 8 and the third relay 9 are closed at the same time, so that the three sub-circuits form a passage at the same time, and the three blades are unlocked. The blades that need to be pitched can be operated to change the pitch to a safe angle, thereby improving the safety of the wind turbine under extreme conditions of excessive wind in the surrounding environment, avoiding the occurrence of blade interlocking failure, resulting in excessive load, and leading to serious accidents such as wind turbine tower collapse.

[0102] In line with the above, see Figure 6 , Figure 6 The present invention provides a schematic diagram of the structure of a wind turbine blade control device. Figure 6 As shown, the device comprises:

[0103] A first acquisition unit 11 is used to acquire wind turbine monitoring data and wind turbine attribute data;

[0104] A first processing unit 12 is used to confirm the state of the first blade according to the monitoring data of the wind turbine generator set;

[0105] A second acquisition unit 13 is configured to extract a blade wind safety load value from the wind turbine attribute data if the first blade state is a blade locked state;

[0106] The second processing unit 14 is used to confirm the predicted wind load value of the blades according to the monitoring data of the wind turbine set;

[0107] A third processing unit 15 is used to determine a target working mode of the blade according to the second blade state;

[0108] The fourth processing unit 16 is used to switch the current working mode of the blade to the target working mode of the blade.

[0109] Further, in the aspect of confirming the state of the first blade according to the monitoring data of the wind turbine generator set, the first processing unit 12 is used to:

[0110] Extracting a blade angle value of a first blade, a blade angle value of a second blade, and a blade angle value of a third blade from the wind turbine monitoring data;

[0111] If the blade angle value of the first blade, the blade angle value of the second blade, and the blade angle value of the third blade are all within the safety angle range, it is confirmed that the first blade is in the unlocked state;

[0112] If one or more of the blade angle values ​​of the first blade, the second blade, and the third blade are not within the safe angle range, it is confirmed that the first blade is in a locked state.

[0113] For the above embodiments, please refer to Figure 7 , Figure 7A schematic diagram of the structure of a terminal provided in an embodiment of the present application, as shown in the figure, includes a processor, an input device, an output device and a memory, the processor, the input device, the output device and the memory are interconnected, wherein the memory is used to store a computer program, the computer program includes program instructions, the processor is configured to call the program instructions, and the program includes instructions for executing the following steps;

[0114] Obtain wind turbine monitoring data and wind turbine attribute data;

[0115] Confirming the state of the first blade according to the wind turbine monitoring data;

[0116] If the first blade state is a blade locked state, extracting a blade wind safety load value from the wind turbine attribute data;

[0117] Confirming the predicted wind load value of the blades according to the monitoring data of the wind turbine set;

[0118] Confirm the state of the second blade according to the preset blade wind safety load value and the blade wind predicted load value;

[0119] Determining a target operating mode of the blade according to the second blade state;

[0120] The current working mode of the blade is switched to the target working mode of the blade.

[0121] In this embodiment, the variable pitch system is confirmed to be in a blade locked state through wind turbine monitoring data, and then the blade wind safety load value is extracted from the wind turbine attribute data. The blade wind predicted load value is confirmed based on the wind turbine monitoring data, and the second blade state is obtained by comparing the wind predicted load value with the blade wind safety load value to confirm whether the currently locked blade can be unlocked. When the second blade state indicates that it can be unlocked, the blade that is not currently at a safe angle is controlled to change its pitch to a safe angle, thereby improving the safety of the wind turbine under extreme conditions where the surrounding wind is too strong, and avoiding blade interlocking failure, which may cause excessive load and lead to serious accidents such as wind turbine tower collapse.

[0122] The above mainly introduces the scheme of the embodiment of the present application from the perspective of the execution process on the method side. It is understandable that in order to realize the above functions, the terminal includes a hardware structure and / or software module corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments provided herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0123] The embodiment of the present application can divide the terminal into functional units according to the above method example. For example, each functional unit can be divided according to each function, or two or more functions can be integrated into one processing unit. The above integrated unit can be implemented in the form of hardware or in the form of software functional units. It should be noted that the division of units in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation.

[0124] An embodiment of the present application also provides a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, and the computer program enables a computer to execute part or all of the steps of any wind turbine blade control method recorded in the above method embodiments.

[0125] An embodiment of the present application also provides a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program enables a computer to execute part or all of the steps of any wind turbine blade control method recorded in the above method embodiments.

[0126] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0127] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0128] In the several embodiments provided in the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of the units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the device or unit can be electrical or other forms.

[0129] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0130] In addition, the functional units in the various embodiments of the application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware or in the form of software program modules.

[0131] If the integrated unit is implemented in the form of a software program module and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a memory, including a number of instructions to enable a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned memory includes: U disk, read-only memory (ROM), random access memory (RAM), mobile hard disk, disk or optical disk and other media that can store program codes.

[0132] A person of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable memory, which can include: a flash drive, a read-only memory, a random access memory, a magnetic disk or an optical disk, etc.

[0133] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for controlling blades of a wind turbine generator set, characterized in that: include: Obtain wind turbine monitoring data and wind turbine attribute data; Confirming the state of the first blade according to the wind turbine monitoring data; If the first blade state is a blade locked state, extracting a blade wind safety load value from the wind turbine attribute data; Confirming the predicted wind load value of the blades according to the monitoring data of the wind turbine set; Confirm the state of the second blade according to the preset blade wind safety load value and the blade wind predicted load value; Determining a target operating mode of the blade according to the second blade state; The current working mode of the blade is switched to the target working mode of the blade.

2. The wind turbine blade control method according to claim 1, characterized in that: Confirming the state of the first blade according to the wind turbine monitoring data includes: Extracting a blade angle value of a first blade, a blade angle value of a second blade, and a blade angle value of a third blade from the wind turbine monitoring data; If the blade angle value of the first blade, the blade angle value of the second blade, and the blade angle value of the third blade are all within the safety angle range, it is confirmed that the first blade is in the unlocked state; If one or more of the blade angle values ​​of the first blade, the second blade, and the third blade are not within the safe angle range, it is confirmed that the first blade is in a locked state.

3. The wind turbine blade control method according to claim 1, characterized in that: According to the wind turbine monitoring data, the predicted wind load value of the blades is confirmed, including: Extracting historical blade angle values, load values ​​corresponding to the historical blade angle values, and real-time blade angle values ​​from the wind turbine monitoring data; Fitting a blade angle-load sinusoidal function curve according to historical blade angle values ​​and load values ​​corresponding to the historical blade angle values; According to the blade angle-load sinusoidal function curve, the blade wind force predicted load value corresponding to the real-time blade angle value is confirmed.

4. The wind turbine blade control method according to claim 1, characterized in that: According to the preset blade wind safety load value and the blade wind predicted load value, confirm the status of the second blade, including: If the predicted blade wind load values ​​are all less than the preset blade wind safety load values, confirm that the second blade state is the blade unlocked state; If one or more of the predicted blade wind load values ​​is greater than the preset blade wind safety load value, it is confirmed that the second blade state is the blade locked state.

5. The wind turbine blade control method according to claim 1, characterized in that: Determining a target operating mode of the blade according to the second blade state includes: If the second blade state is confirmed to be a blade unlocked state, confirming the blade target operating mode as a variable pitch operating mode; If the second blade state is confirmed to be a blade locked state, the blade target operating mode is confirmed to be a locked operating mode.

6. A wind turbine blade control circuit, used to implement the wind turbine blade control method according to any one of claims 1 to 5, characterized in that: include: Pitch control module; A first PMM driver, a first single-pole double-throw switch, a second relay and a third relay, the first signal end of the pitch control module is respectively connected to the signal ends of the first PMM driver, the first single-pole double-throw switch, the second relay and the third relay, the 24V power supply output end of the first PMM driver is connected to the input end of the first single-pole double-throw switch, one port of the first single-pole double-throw switch is connected to the enable signal input end of the first PMM driver, the second port of the first single-pole double-throw switch is connected to the input end of the second relay, the output end of the second relay is connected to the input end of the third relay, and the output end of the third relay is connected to the enable input end of the first PMM driver; a second PMM driver, a second single-pole double-throw switch, a first relay and a third relay, the second signal end of the pitch control module is respectively connected to the signal ends of the second PMM driver, the second single-pole double-throw switch, the first relay and the third relay, the 24V power supply output end of the second PMM driver is connected to the input end of the second single-pole double-throw switch, one port of the second single-pole double-throw switch is connected to the enable signal input end of the second PMM driver, two ports of the second single-pole double-throw switch are connected to the input end of the first relay, the output end of the first relay is connected to the input end of the third relay, and the output end of the third relay is connected to the enable input end of the second PMM driver; a third PMM driver, a third single-pole double-throw switch, a first relay, and a second relay, the third signal end of the pitch control module is respectively connected to the signal ends of the third PMM driver, the third single-pole double-throw switch, the first relay, and the second relay, the 24V power supply output end of the third PMM driver is connected to the input end of the third single-pole double-throw switch, one port of the third single-pole double-throw switch is connected to the enable signal input end of the third PMM driver, two ports of the third single-pole double-throw switch are connected to the input end of the first relay, the output end of the first relay is connected to the input end of the second relay, and the output end of the second relay is connected to the enable input end of the third PMM driver; If the first PMM driver, the first single-pole double-throw switch, the second relay and the third relay form a path, the first relay is closed; If the second PMM driver, the second single-pole double-throw switch, the first relay and the third relay form a path, the second relay is closed; If the third PMM driver, the third single-pole double-throw switch, the first relay and the second relay form a path, the third relay is closed.

7. A wind turbine blade control device, characterized in that: include: A first acquisition unit, used to acquire wind turbine monitoring data and wind turbine attribute data; A first processing unit, configured to confirm a first blade state according to the wind turbine monitoring data; a second acquisition unit, configured to extract a blade wind safety load value from the wind turbine attribute data if the first blade state is a blade locked state; A second processing unit is used to confirm the predicted wind load value of the blades according to the monitoring data of the wind turbine set; a third processing unit, configured to determine a target operating mode of the blade according to the second blade state; The fourth processing unit is used to switch the current working mode of the blade to the target working mode of the blade.

8. The wind turbine blade control device according to claim 7, characterized in that: In the aspect of confirming the state of the first blade according to the monitoring data of the wind turbine generator set, the first processing unit is used to: Extracting a blade angle value of a first blade, a blade angle value of a second blade, and a blade angle value of a third blade from the wind turbine monitoring data; If the blade angle value of the first blade, the blade angle value of the second blade, and the blade angle value of the third blade are all within the safety angle range, it is confirmed that the first blade is in the unlocked state; If one or more of the blade angle values ​​of the first blade, the second blade, and the third blade are not within the safe angle range, it is confirmed that the first blade is in a locked state.

9. A terminal, characterized in that: It includes a processor, an input device, an output device and a memory, which are interconnected, wherein the memory is used to store a computer program, the computer program includes program instructions, and the processor is configured to call the program instructions to execute the wind turbine blade control method according to any one of claims 1 to 5.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, wherein the computer program includes program instructions, and when the program instructions are executed by a processor, the processor executes the wind turbine blade control method according to any one of claims 1 to 5.

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