Adaptive variable pitch control method and device for wind turbine generator

Abstract

A wind turbine adaptive variable pitch control method and device are disclosed. The adaptive variable pitch control method comprises: obtaining wind turbine unit operation data and meteorological warning wind speed; identifying whether the wind turbine unit fails based on the unit operation data; in response to identifying that the wind turbine unit does not fail, determining whether the meteorological warning wind speed is greater than a first preset wind speed; in response to the meteorological warning wind speed being less than or equal to the first preset wind speed, performing variable pitch control based on a first mode on the wind turbine; in response to the meteorological warning wind speed being greater than the first preset wind speed, performing variable pitch control based on a second mode on the wind turbine, wherein the first mode indicates a first variable pitch operating state of an upwind leading edge to wind, and the second mode indicates a second variable pitch operating state of an upwind trailing edge to wind.

Description

Technical Field

[0001] This disclosure generally relates to the field of wind power generation technology, and more specifically, to an adaptive pitch control method and apparatus for wind turbine generators. Background Technology

[0002] In the wind power industry, strong winds (e.g., extreme winds) are one of the environmental factors that cause wind turbine failures in wind farms that have already been put into use. Therefore, in the design process of wind turbines, the impact of such strong winds on wind turbines needs to be listed as one of the important design objectives so that the wind turbines can resist the adverse effects of such strong winds on the units during subsequent actual operation.

[0003] As the diameter of the rotors used in wind turbines increases, the ultimate load on large-rotor turbines increases rapidly in a short period of time during typhoons, which can easily cause destructive damage to the major components of the turbine. As a key component of the entire machine, how the individual blades of the wind turbine can adjust their pitch under extremely high wind speeds to achieve typhoon-resistant operation has become a key design consideration in related fields. Summary of the Invention

[0004] The embodiments of this disclosure provide an adaptive pitch control method and apparatus for wind turbines, thereby realizing adaptive pitch load reduction protection for wind turbines under different wind speed scenarios.

[0005] In one general aspect, an adaptive pitch control method for a wind turbine is provided, the adaptive pitch control method comprising: acquiring wind turbine operating data and weather warning wind speed; identifying whether the wind turbine has malfunctioned based on the operating data; determining whether the weather warning wind speed is greater than a first preset wind speed in response to identifying that the wind turbine has not malfunctioned; performing pitch control based on a first mode on the wind turbine in response to the weather warning wind speed being less than or equal to the first preset wind speed; and performing pitch control based on a second mode on the wind turbine in response to the weather warning wind speed being greater than the first preset wind speed, wherein the first mode indicates a first pitch operating state with the upwind front edge facing the wind, and the second mode indicates a second pitch operating state with the upwind trailing edge facing the wind.

[0006] Optionally, the step of performing pitch control based on a second mode on the wind turbine in response to the weather warning wind speed being greater than the first preset wind speed may include: obtaining the turbine's operating wind speed; and performing pitch control based on the second mode on the wind turbine in response to the weather warning wind speed being greater than the first preset wind speed and the current turbine operating wind speed being greater than or equal to the first pitch switching wind speed, so that the wind turbine can operate in a second typhoon-resistant mode, wherein the first pitch switching wind speed is a critical wind speed indicating the switching of the leading edge of the wind turbine blades from windward to trailing edge windward.

[0007] Optionally, the step of performing pitch control based on the first mode on the wind turbine in response to the weather warning wind speed being less than or equal to the first preset wind speed may include: performing pitch control based on the first mode on the wind turbine in response to the weather warning wind speed being less than or equal to the first preset wind speed and the current turbine operating wind speed being less than the first pitch switching wind speed, so that the wind turbine can operate in the first typhoon resistance mode.

[0008] Optionally, the step of performing pitch control based on the second mode on the wind turbine may include: when the operating power of the wind turbine meets predetermined conditions, switching the blade pitch angle of the wind turbine from a first blade pitch angle combination to a second blade pitch angle combination, wherein the first blade pitch angle combination is an optimized shutdown pitch angle combination of the blades, and the second blade pitch angle combination is an optimized pitch angle combination of the blades corresponding to the trailing edge wind.

[0009] Optionally, after the step of performing pitch control based on the second mode on the wind turbine in response to the weather warning wind speed being greater than the first preset wind speed, the adaptive pitch control method may further include: determining whether the weather warning wind speed is less than the first preset wind speed in response to the current turbine operating wind speed being less than the second pitch switching wind speed for a preset duration; performing pitch control based on the first mode on the wind turbine in response to the weather warning wind speed being less than the first preset wind speed; and maintaining pitch control based on the second mode on the wind turbine in response to the weather warning wind speed being greater than or equal to the first preset wind speed, wherein the second pitch switching wind speed is a critical wind speed indicating the switching of the trailing edge of the wind turbine blades to the leading edge.

[0010] Optionally, in response to the weather warning wind speed being less than the first preset wind speed, the step of performing pitch control on the wind turbine based on the first mode may include: in response to the weather warning wind speed being less than the first preset wind speed, switching the blade pitch angle of the wind turbine from the second blade pitch angle combination to the first blade pitch angle combination.

[0011] Optionally, the adaptive pitch control method may further include: in response to the current operating wind speed of the wind turbine not being lower than the second pitch switching wind speed for a preset duration, maintaining pitch control based on the second mode on the wind turbine.

[0012] Optionally, the adaptive pitch control method may further include: acquiring the wind turbine's operating wind speed; in response to identifying that the wind turbine has malfunctioned and the current operating wind speed is less than or equal to a preset fault maintenance wind speed, performing pitch control on the wind turbine based on a third mode; in response to identifying that the wind turbine has malfunctioned and the current operating wind speed is greater than the preset fault maintenance wind speed, performing pitch control on the wind turbine based on a fourth mode, wherein the third mode indicates a third pitch operating state for upwind / downwind alignment for fault maintenance, and the fourth mode indicates a fourth pitch operating state for upwind / downwind alignment for fault typhoon resistance.

[0013] In another general aspect, an adaptive pitch control device for a wind turbine is provided, the adaptive pitch control device comprising: a data acquisition module configured to acquire wind turbine operating data and weather warning wind speed; a fault identification module configured to identify whether the wind turbine has malfunctioned based on the operating data; and a pitch control module configured to: in response to identifying that the wind turbine has not malfunctioned, determine whether the weather warning wind speed is greater than a first preset wind speed; in response to the weather warning wind speed being less than or equal to the first preset wind speed, perform pitch control on the wind turbine based on a first mode; and in response to the weather warning wind speed being greater than the first preset wind speed, perform pitch control on the wind turbine based on a second mode, wherein the first mode indicates a first pitch operating state with the upwind front edge facing the wind, and the second mode indicates a second pitch operating state with the upwind trailing edge facing the wind.

[0014] Optionally, the pitch control module, in response to the weather warning wind speed being greater than the first preset wind speed, performs pitch control based on the second mode on the wind turbine, which may include: acquiring the turbine's operating wind speed; and, in response to the weather warning wind speed being greater than the first preset wind speed and the current turbine operating wind speed being greater than or equal to the first pitch switching wind speed, performing pitch control based on the second mode on the wind turbine, so that the wind turbine can operate in a second typhoon-resistant mode, wherein the first pitch switching wind speed is a critical wind speed indicating the switching of the leading edge of the wind turbine blades from windward to trailing edge windward.

[0015] Optionally, the pitch control module may perform pitch control based on the first mode on the wind turbine in response to the weather warning wind speed being less than or equal to the first preset wind speed. This may include: in response to the weather warning wind speed being less than or equal to the first preset wind speed and the current turbine operating wind speed being less than the first pitch switching wind speed, performing pitch control based on the first mode on the wind turbine so that the wind turbine can operate in the first typhoon resistance mode.

[0016] Optionally, the pitch control module may perform pitch control based on the second mode on the wind turbine, which may include: when the operating power of the wind turbine meets predetermined conditions, switching the blade pitch angle of the wind turbine from a first blade pitch angle combination to a second blade pitch angle combination, wherein the first blade pitch angle combination is an optimized shutdown pitch angle combination of the blades, and the second blade pitch angle combination is an optimized pitch angle combination of the blades corresponding to the trailing edge wind.

[0017] Optionally, after the pitch control module performs pitch control based on the second mode on the wind turbine in response to the weather warning wind speed being greater than the first preset wind speed, the pitch control module may further be configured to: determine whether the weather warning wind speed is less than the first preset wind speed in response to the current turbine operating wind speed being less than the second pitch switching wind speed for a preset duration; perform pitch control based on the first mode on the wind turbine in response to the weather warning wind speed being less than the first preset wind speed; and maintain pitch control based on the second mode on the wind turbine in response to the weather warning wind speed being greater than or equal to the first preset wind speed, wherein the second pitch switching wind speed is a critical wind speed indicating the switching of the trailing edge of the wind turbine blades from windward to leading edge windward.

[0018] Optionally, the pitch control module may perform pitch control based on the first mode on the wind turbine in response to the weather warning wind speed being less than the first preset wind speed. This operation may include: switching the blade pitch angle of the wind turbine from the second blade pitch angle combination to the first blade pitch angle combination in response to the weather warning wind speed being less than the first preset wind speed.

[0019] Optionally, the pitch control module can also be configured to: in response to the current unit operating wind speed being less than the second pitch switching wind speed for a preset duration, maintain pitch control based on the second mode on the wind turbine unit.

[0020] Optionally, the pitch control module may also be configured to: acquire the wind turbine's operating wind speed; in response to identifying that the wind turbine has malfunctioned and the current operating wind speed is less than or equal to a preset fault maintenance wind speed, perform pitch control on the wind turbine based on a third mode; in response to identifying that the wind turbine has malfunctioned and the current operating wind speed is greater than the preset fault maintenance wind speed, perform pitch control on the wind turbine based on a fourth mode, wherein the third mode indicates a third pitch operation state for upwind / downwind alignment for fault maintenance, and the fourth mode indicates a fourth pitch operation state for upwind / downwind alignment for fault typhoon resistance.

[0021] In another general aspect, a computer program product is provided, the computer program product comprising a computer program / instructions that, when executed by a processor, implement the adaptive pitch control method as described above.

[0022] In another general aspect, a computer-readable storage medium is provided that, when the instructions in the computer-readable storage medium are executed by a processor of an electronic device / server, enables the electronic device / server to perform the adaptive pitch control method as described above.

[0023] In another general aspect, a computer device is provided, the computer device comprising: at least one processor; at least one memory storing computer-executable instructions, wherein, when executed by the at least one processor, the computer-executable instructions cause the at least one processor to perform the adaptive pitch control method as described above.

[0024] The adaptive pitch control method and apparatus for wind turbines according to embodiments of this disclosure reduce the actual load on wind turbines during typhoons by proposing an adaptive pitch control strategy based on weather warnings. This achieves adaptive pitch load reduction protection for wind turbines under different wind speed scenarios, thereby reducing the design cost of various turbine components and improving the reliability of the wind turbines. Furthermore, by using the adaptive pitch control strategy based on weather warnings, it can be ensured that the wind turbines can re-engage for power generation in scenarios where the maximum resistive wind speed is not exceeded. This ensures that the wind turbines can fully utilize power generation even under different typhoon conditions (e.g., extreme V50 wind speeds, i.e., typhoons occurring once every 50 years), thereby improving efficiency. Attached Figure Description

[0025] The above and other objects and features of the embodiments of this disclosure will become clearer from the following description taken in conjunction with the accompanying drawings illustrating the embodiments, wherein:

[0026] Figure 1 This is a flowchart illustrating an adaptive pitch control method for a wind turbine according to an embodiment of the present disclosure;

[0027] Figure 2 This is a flowchart illustrating an example of an adaptive pitch control method for a wind turbine according to an embodiment of the present disclosure;

[0028] Figure 3 This is a block diagram illustrating an adaptive pitch control device for a wind turbine according to an embodiment of the present disclosure;

[0029] Figure 4 This is a block diagram illustrating a computer device according to an embodiment of the present disclosure. Detailed Implementation

[0030] The following detailed embodiments are provided to aid the reader in gaining a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will become apparent upon understanding this disclosure. For example, the order of operations described herein is merely illustrative and is not limited to those orders set forth herein, but may be changed as will become clear upon understanding this disclosure, except for operations that must occur in a specific order. Furthermore, for clarity and conciseness, descriptions of features known in the art may be omitted.

[0031] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided only to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein, which will become clear upon understanding the disclosure of this application.

[0032] As used herein, the term “and / or” includes any one of the associated listed items and any combination of any two or more.

[0033] The terminology used herein is for the purpose of describing various examples only and is not intended to limit disclosure. Unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well. The terms “comprising,” “including,” and “having” indicate the presence of the described features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0034] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains upon understanding this disclosure. Unless expressly defined herein, terms (such as those defined in a general dictionary) shall be interpreted as having a meaning consistent with their meaning in the context of the relevant field and in this disclosure, and shall not be interpreted in an idealized or overly formalistic manner.

[0035] Furthermore, in the description of the examples, detailed descriptions of well-known related structures or functions will be omitted when it is believed that such detailed descriptions would lead to a vague interpretation of this disclosure.

[0036] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings, examples of which are illustrated in the drawings, wherein the same reference numerals always refer to the same parts. The embodiments will now be described with reference to the accompanying drawings in order to explain this disclosure.

[0037] The following reference Figures 1 to 4 The adaptive pitch control method and apparatus for wind turbines according to embodiments of the present disclosure are described in detail.

[0038] Figure 1 This is a flowchart illustrating an adaptive pitch control method 100 for a wind turbine according to an embodiment of the present disclosure.

[0039] Reference Figure 1 In step S101, the unit operation data and meteorological warning wind speed of the wind turbine are obtained.

[0040] For example, wind speed warnings can be generated from any weather forecast data source worldwide. As examples, weather forecast data sources may include, but are not limited to, the China Meteorological Administration and the European Centre for Meteorological Studies.

[0041] According to an embodiment of this disclosure, in step S102, a fault is identified in the wind turbine based on the turbine's operating data.

[0042] According to an embodiment of this disclosure, in step S103, in response to identifying that the wind turbine unit has not malfunctioned, it is determined whether the weather warning wind speed is greater than the first preset wind speed.

[0043] Here, the first preset wind speed can represent the maximum achievable wind speed at the windward front edge of the wind turbine. As an example, the value of the first preset wind speed can be between the preset wind speed Vstart and the preset wind speed Vend. Here, Vstart can be, for example, but not limited to, V1 (i.e., the wind speed of a typhoon that occurs once every 1 year), and Vend can be, for example, but not limited to, V20 (i.e., the wind speed of a typhoon that occurs once every 20 years), V25 (i.e., the wind speed of a typhoon that occurs once every 25 years), and V50 (i.e., the wind speed of a typhoon that occurs once every 50 years).

[0044] Here, the preset wind speeds Vstart and Vend are not limited to the examples above, and can be set to various wind speed values ​​as needed, provided that the preset wind speed Vend is greater than the preset wind speed Vstart. For ease of description, the following explanation will use the example of "the first preset wind speed can be between V1 and V50" as an example.

[0045] According to an embodiment of this disclosure, in step S104, in response to a weather warning that the wind speed is less than or equal to a first preset wind speed, pitch control based on a first mode is performed on the wind turbine.

[0046] Here, the first mode indicates the first pitch control operation state of the upwind leading edge alignment. For example, this first mode can be used as the first typhoon-resistant combination mode, and the leading edge alignment can be achieved using either a precise alignment mode or an offset alignment mode.

[0047] Furthermore, when the wind turbine is operating in the first mode, it has the ability to "grab" power (power generation mode). In this mode, since the weather warning wind speed has not yet reached the first preset wind speed, the wind turbine can generate power without reducing load, thus improving the power generation efficiency of the wind turbine. As an example, "grabbing" power can refer to re-entering the power grab mode.

[0048] As an example, step S104 may further include: in response to a weather warning wind speed being less than or equal to a first preset wind speed and the current operating wind speed of the unit being less than the first pitch switching wind speed, performing pitch control on the wind turbine based on a first mode so that the wind turbine can operate in a first typhoon-resistant mode.

[0049] Here, the first pitch switching wind speed is the critical wind speed at which the leading edge of the wind turbine blades switches to trailing edge wind.

[0050] By employing the mode selection strategy disclosed herein, it is possible to re-engage for power generation in scenarios where the wind speed under weather warning does not exceed the preset maximum resistance wind speed. This allows wind turbines to fully engage for power generation during typhoons or extreme V50 conditions, thereby increasing revenue.

[0051] According to an embodiment of this disclosure, in step S105, in response to a weather warning that the wind speed is greater than a first preset wind speed, pitch control based on a second mode is performed on the wind turbine.

[0052] Here, the second mode indicates the second pitch control operation state of the trailing edge alignment in the upwind direction. For example, this second mode can be used as a second typhoon-resistant combination mode, and the trailing edge alignment can be achieved using either a precise alignment mode or an offset alignment mode.

[0053] Furthermore, when the wind turbine is operating in the second mode, it mainly achieves the functions of load reduction (e.g., load reduction based on wind speed) and ensuring the safety of the unit. At this time, since the wind speed warned by the weather has exceeded the first preset wind speed, the wind turbine does not perform power-saving operation, because power-saving operation in this situation is risky.

[0054] Optionally, the step of performing pitch control based on the second mode on the wind turbine in step S105 may include: when the operating power of the wind turbine meets predetermined conditions, switching the blade pitch angle of the wind turbine from the first blade pitch angle combination to the second blade pitch angle combination.

[0055] Here, the aforementioned predetermined conditions can refer to the electrical conditions required to enable the wind turbine to perform subsequent operations and achieve pitch control.

[0056] For example, the first blade pitch angle combination is the optimized pitch angle combination for stopping the blades, and the second blade pitch angle combination is the optimized pitch angle combination for blades corresponding to the trailing edge wind.

[0057] Furthermore, as an example, for each wind-fighting state of a wind turbine (e.g., leading-edge wind-fighting, offset wind-fighting, trailing-edge wind-fighting), the corresponding values ​​of the pitch angles in different groups may be equal, partially equal, or completely unequal.

[0058] As an example, step S105 may include steps S1051 and S1052.

[0059] In step S1051, the wind speed of the wind turbine unit is obtained.

[0060] In step S1052, in response to the weather warning wind speed being greater than the first preset wind speed and the current unit operating wind speed being greater than or equal to the first pitch switching wind speed, pitch control based on the second mode is performed on the wind turbine, so that the wind turbine can operate in the second typhoon resistance mode.

[0061] According to an embodiment of this disclosure, after step S105, the adaptive pitch control method 100 may further include steps S107 to S109 (not shown).

[0062] In step S107, in response to the current operating wind speed of the wind turbine being lower than the second pitch switching wind speed for a preset duration, it is determined whether the weather warning wind speed is lower than the first preset wind speed. Here, the second pitch switching wind speed is the critical wind speed indicating the switching from trailing edge to leading edge wind speed for the wind turbine blades.

[0063] As an example, the adaptive pitch control method 100 may further include: in response to the condition that the current operating wind speed of the wind turbine is less than the second pitch switching wind speed for a preset duration as described in step S107 is not met, maintaining pitch control based on the second mode on the wind turbine.

[0064] Furthermore, the second pitch switching wind speed can be equal to the first pitch switching wind speed mentioned above, but it is not limited to this. The two can also be unequal. For example, the second pitch switching wind speed can be slightly less than the first pitch switching wind speed and the difference between the two is small.

[0065] In step S108, in response to a weather warning that the wind speed is less than the first preset wind speed, pitch control based on the first mode is performed on the wind turbine.

[0066] Further, step S108 may specifically include: in response to a weather warning that the wind speed is less than a first preset wind speed, switching the blade pitch angle of the wind turbine from the second blade pitch angle combination to the first blade pitch angle combination.

[0067] In step S109, in response to a weather warning that the wind speed is greater than or equal to a first preset wind speed, the wind turbine is kept under pitch control based on the second mode.

[0068] According to an embodiment of this disclosure, in step S106, in response to the wind turbine failure identified in step S102, other operations described below are performed, namely, steps S1061 to S1063.

[0069] In step S1061, the wind speed of the wind turbine unit is obtained.

[0070] In step S1062, in response to the identification of a fault in the wind turbine and the current operating wind speed of the turbine being less than or equal to the preset fault maintenance wind speed, pitch control based on the third mode is performed on the wind turbine.

[0071] In step S1063, in response to the identification that a wind turbine has malfunctioned and the current operating wind speed of the turbine is greater than the preset fault maintenance wind speed, pitch control based on the fourth mode is performed on the wind turbine.

[0072] Here, the third mode indicates the third pitch control operation state for upwind / downwind alignment used for fault maintenance, and the fourth mode indicates the fourth pitch control operation state for upwind / downwind alignment used for fault typhoon resistance.

[0073] For example, the third mode mentioned above is a mode in which a fault exists and the fault maintenance conditions are met. In other words, in this mode, the fault currently existing in the wind turbine can be maintained and restored to normal.

[0074] For example, the fourth mode mentioned above is a typhoon-resistant operation mode with propeller jamming and / or yaw faults. In other words, in this mode, the faults currently identified in the wind turbine cannot be maintained to a normal state, and the wind turbine will continue to operate under fault conditions.

[0075] Furthermore, the first to fourth modes described above all represent the operating states of the wind turbine. The selection strategy for these four modes proposed in this disclosure can effectively reduce the constraints imposed by, for example, V50 wind speeds and different typhoon wind speeds on the overall turbine design load, and can improve the reliability of the wind turbine.

[0076] By applying pitch control to wind turbines under different typhoon conditions based on the maximum design wind speed achievable under different typhoon conditions, the actual load on wind turbines during typhoons can be reduced, thereby reducing the design cost of various components of the turbine and increasing the reliability of the turbine.

[0077] The following is based on reference Figure 2 To illustrate the adaptive pitch control method 100 for wind turbines as described above, let's take an example. Figure 2 This is a flowchart illustrating an example of an adaptive pitch control method for a wind turbine according to an embodiment of the present disclosure.

[0078] As an example, an example of an adaptive pitch control method for wind turbines may include the following steps 1) to 9):

[0079] In step S201), it is first determined whether there is a fault in the wind turbine (e.g., propeller jamming and / or yaw fault).

[0080] In frame S202, if a fault is detected in the wind turbine, the fault maintenance mode or the fault typhoon resistance mode is executed. The specific execution mode is determined by referring to steps S1062 and S1063 above, which will not be repeated here.

[0081] In step S203, if it is determined that there is no fault in the wind turbine, it is determined whether the weather warning wind speed (indicating the future predicted wind speed) is greater than the preset wind speed (V maximum resistance as shown in the figure).

[0082] Next, if it is determined that the wind speed in the weather warning is greater than the preset wind speed, then in step S205 it is further determined whether the wind speed of the unit operation (indicating the current actual wind speed) has reached the first pitch switching wind speed (V pitch switching wind speed 1 as shown in the figure); otherwise, the wind turbine unit performs upwind forward edge wind (as shown in box S204).

[0083] As an example, leading-edge convection can be achieved using either precise convection mode or offset convection.

[0084] In this disclosure, the execution process from block S201 to block S202, and from blocks S203 and S205 to block S204 respectively, is not described in a limiting way. For example, in the execution process from blocks S203 and S205 to block S204, it is not necessary to achieve the operating state shown in block S204 by the execution action defined in block S214, but other feasible actions may be used as needed to achieve the above-mentioned operating state.

[0085] In step S206, if it is determined from step S205 that the unit's operating wind speed has reached the first pitch switching wind speed, it indicates that upwind trailing edge alignment will be performed soon. In this case, it is necessary to determine whether the power grid has lost power in order to provide power guarantee for the operation to be performed.

[0086] As an example, trailing edge convection can be achieved using either precise convection mode or offset convection.

[0087] Next, if it is determined that the power grid has lost power, a backup pitch strategy is initiated in step S207, and power is provided by, but not limited to, supercapacitors in step S209 to restore power grid supply; otherwise, a pitch strategy without backup power is initiated in step S208.

[0088] Here, this disclosure does not impose specific restrictions on the backup type pitch strategy / no backup type pitch strategy, and any relevant strategy available in the art can be used to implement it.

[0089] In step S210, while ensuring power supply from the grid, the wind turbine is adaptively pitched to X2-Y2-Z2 with an attitude of X1-Y1-Z1, thereby achieving upwind trailing edge alignment (as shown in box S211).

[0090] Here, X1-Y1-Z1 represents the optimal pitch angle combination for the three blades at the stop, and X2-Y2-Z2 represents the optimal pitch angle combination for the three blades facing the wind at the trailing edge. It should be noted that in this disclosure, each pitch angle in "X1-Y1-Z1" and "X2-Y2-Z2" is not limited to a single set of values, but may include multiple combinations of values.

[0091] Here, as an example, the steps to enable the wind turbine to adaptively switch from the X1-Y1-Z1 attitude to the X2-Y2-Z2 attitude can be represented as follows: adjust the pitch sequentially or in a specified number of steps from the X1-Y1-Z1 attitude to reach the X2-Y2-Z2 attitude.

[0092] In step S212, after implementing block S211, it is further determined whether the unit operating wind speed is less than the second pitch switching wind speed (V pitch switching wind speed 2 as shown in the figure) and continues for a predetermined period of time (e.g., 30 minutes). If the condition is met, step S213 is executed; otherwise, the process returns to block S211 to maintain the operating state as shown in S211.

[0093] In step S213, it is determined whether the corresponding weather warning wind speed is less than the preset wind speed. If so, in step S214, the wind turbine is made to adaptively switch the pitch from X2-Y2-Z2 to X1-Y1-Z1, thereby achieving wind-to-wind alignment with the upwind and forward edge (as shown in box S204).

[0094] Figure 3 This is a block diagram illustrating an adaptive pitch control device 300 for a wind turbine according to an embodiment of the present disclosure.

[0095] Reference Figure 3 The adaptive pitch control device 300 for a wind turbine according to an embodiment of the present disclosure may include a data acquisition module 310, a fault identification module 320, and a pitch control module 330.

[0096] According to embodiments of this disclosure, the data acquisition module 310 is configured to acquire wind turbine operating data and weather warning wind speeds. As an example, the operating data may include various data related to the operation of the wind turbine.

[0097] In addition, the data acquisition module 310 can also be configured to acquire the wind speed at which the wind turbine is running.

[0098] According to embodiments of this disclosure, the fault identification module 320 is configured to identify whether a wind turbine has malfunctioned based on turbine operating data.

[0099] According to embodiments of this disclosure, when a fault is detected in the wind turbine by the fault identification module 320, the pitch control module 330 may perform the following operations: in response to the current turbine operating wind speed being less than or equal to a preset fault maintenance wind speed, perform pitch control on the wind turbine based on a third mode; in response to the current turbine operating wind speed being greater than a preset fault maintenance wind speed, perform pitch control on the wind turbine based on a fourth mode.

[0100] Here, the third mode indicates the third pitch control operation state for upwind / downwind alignment used for fault maintenance, and the fourth mode indicates the fourth pitch control operation state for upwind / downwind alignment used for fault typhoon resistance.

[0101] According to an embodiment of this disclosure, the pitch control module 330 is configured to: in response to identifying that the wind turbine has not malfunctioned, determine whether the weather warning wind speed is greater than a first preset wind speed; in response to the weather warning wind speed being less than or equal to the first preset wind speed, perform pitch control on the wind turbine based on a first mode; and in response to the weather warning wind speed being greater than the first preset wind speed, perform pitch control on the wind turbine based on a second mode.

[0102] Here, the first mode indicates the first pitch control operation state with the upwind leading edge facing the wind, and the second mode indicates the second pitch control operation state with the upwind trailing edge facing the wind.

[0103] As an example, the pitch control module 330 may perform pitch control based on the first mode on the wind turbine in response to a weather warning wind speed that is less than or equal to the first preset wind speed. This may include: in response to a weather warning wind speed that is less than or equal to the first preset wind speed and the current operating wind speed of the turbine being less than the first pitch switching wind speed, the pitch control module 330 may perform pitch control based on the first mode on the wind turbine so that the wind turbine can operate in the first typhoon resistance mode.

[0104] As an example, the pitch control module 330 may perform pitch control based on the second mode on the wind turbine in response to a weather warning wind speed greater than a first preset wind speed. This operation may include: acquiring the wind turbine's operating wind speed; and performing pitch control based on the second mode on the wind turbine in response to a weather warning wind speed greater than the first preset wind speed and the current operating wind speed being greater than or equal to the first pitch switching wind speed, so that the wind turbine can operate in the second typhoon-resistant mode.

[0105] Here, the first pitch switching wind speed is the critical wind speed at which the leading edge of the wind turbine blades switches to trailing edge wind.

[0106] According to embodiments of this disclosure, the operation of the pitch control module 330 to perform pitch control based on the second mode on the wind turbine may include: when the operating power of the wind turbine meets predetermined conditions, switching the blade pitch angle of the wind turbine from a first blade pitch angle combination to a second blade pitch angle combination.

[0107] Here, the first blade pitch angle combination is the optimized pitch angle combination for stopping the blades, and the second blade pitch angle combination is the optimized pitch angle combination for the blades corresponding to the trailing edge facing the wind.

[0108] As an example, after the pitch control module 330 performs pitch control based on the second mode on the wind turbine in response to the weather warning wind speed being greater than the first preset wind speed, the pitch control module 330 can also be configured to: determine whether the weather warning wind speed is less than the first preset wind speed in response to the current operating wind speed being less than the second pitch switching wind speed for a preset duration; perform pitch control based on the first mode on the wind turbine in response to the weather warning wind speed being less than the first preset wind speed; and maintain the second mode-based pitch control on the wind turbine in response to the weather warning wind speed being greater than or equal to the first preset wind speed.

[0109] Here, the second pitch switching wind speed is the critical wind speed at which the trailing edge of the wind turbine blade switches to the leading edge.

[0110] Optionally, the pitch control module 330 may perform pitch control based on the first mode on the wind turbine in response to a weather warning wind speed being less than the first preset wind speed. This operation may include: switching the blade pitch angle of the wind turbine from the second blade pitch angle combination to the first blade pitch angle combination in response to a weather warning wind speed being less than the first preset wind speed.

[0111] Optionally, the pitch control module 330 can also be configured to: in response to the current unit operating wind speed being less than the second pitch switching wind speed for a preset duration, maintain pitch control of the wind turbine based on the second mode.

[0112] It should be noted that the operations performed by the above modules can be compared with those in the reference section. Figure 1 The related content is similar, so I will not repeat it here.

[0113] Figure 4 This is a block diagram illustrating a computer device 400 according to an embodiment of the present disclosure.

[0114] Reference Figure 4 The computer device 400 according to embodiments of the present disclosure may include a processor 410 and a memory 420. The processor 410 may include (but is not limited to) a central processing unit (CPU), a digital signal processor (DSP), a microcomputer, a field-programmable gate array (FPGA), a system-on-a-chip (SoC), a microprocessor, an application-specific integrated circuit (ASIC), etc. The memory 420 may store computer-executable instructions to be executed by the processor 410. The memory 420 includes high-speed random access memory and / or a non-volatile computer-readable storage medium. When the processor 410 executes the computer-executable instructions stored in the memory 420, the adaptive pitch control method described above can be implemented.

[0115] The adaptive pitch control method according to embodiments of this disclosure can be written as a computer program / instructions to form a computer program product and stored on a computer-readable storage medium. When the computer program / instructions are executed by a processor, the adaptive pitch control method as described above can be implemented. When the instructions in the computer-readable storage medium are executed by a processor of an electronic device / server, the electronic device / server is enabled to perform the adaptive pitch control method as described above. Examples of computer-readable storage media include: read-only memory (ROM), random access programmable read-only memory (PROM), electrically erasable programmable read-only memory (EEPROM), random access memory (RAM), dynamic random access memory (DRAM), static random access memory (SRAM), flash memory, non-volatile memory, CD-ROM, CD-R, CD+R, CD-RW, CD+RW, DVD-ROM, DVD-R, DVD+R, DVD-RW, DVD+RW, DVD-RAM, BD-ROM, BD-R, BD-R LTH, BD-RE, Blu-ray or optical disc storage, hard disk drive (HDD), solid-state drive (SSD), card storage (such as multimedia cards, secure digital (SD) cards, or ultra-fast digital (XD) cards), magnetic tape, floppy disk, magneto-optical data storage device, optical data storage device, hard disk, solid-state drive, and any other device configured to store computer programs and any associated data, data files, and data structures in a non-transitory manner and to provide the computer programs and any associated data, data files, and data structures to a processor or computer so that the processor or computer can execute the computer programs. In one example, the computer programs and any associated data, data files, and data structures are distributed across a networked computer system, such that the computer programs and any associated data, data files, and data structures are stored, accessed, and executed in a distributed manner through one or more processors or computers.

[0116] The adaptive pitch control method and apparatus for wind turbines according to embodiments of this disclosure reduce the actual load on wind turbines under typhoons through an adaptive pitch control strategy based on weather warnings. This achieves adaptive pitch load reduction protection for wind turbines under different wind speed scenarios, thereby reducing the design cost of various turbine components and improving the reliability of wind turbines.

[0117] On the other hand, by using an adaptive pitch control strategy based on weather warnings, it can be ensured that the wind turbine can re-engage in power generation scenarios that do not exceed the maximum wind resistance speed, thus ensuring that the wind turbine can fully seize power even in typhoons or extreme V50 conditions, thereby improving efficiency.

[0118] While some embodiments of this disclosure have been disclosed and described, those skilled in the art will understand that modifications and variations may be made to these embodiments without departing from the concept and spirit of this disclosure, which is defined by the claims and their equivalents.

Claims

1. An adaptive pitch control method for wind turbine generators, characterized in that, The adaptive pitch control method includes: Acquire wind turbine unit operating data and meteorological warning wind speed; The wind turbine is identified as having malfunctioned based on the unit's operating data. In response to the identification that the wind turbine unit has not malfunctioned, determine whether the weather warning wind speed is greater than the first preset wind speed; In response to the weather warning wind speed being less than or equal to the first preset wind speed, pitch control based on the first mode is performed on the wind turbine. In response to the weather warning that the wind speed is greater than the first preset wind speed, pitch control based on the second mode is executed on the wind turbine. The first mode indicates a first pitch control operation state with the upwind leading edge facing the wind, and the second mode indicates a second pitch control operation state with the upwind trailing edge facing the wind. The step of performing pitch control based on a second mode on the wind turbine in response to the weather warning wind speed being greater than the first preset wind speed includes: obtaining the turbine's operating wind speed; and performing pitch control based on the second mode on the wind turbine in response to the weather warning wind speed being greater than the first preset wind speed and the current turbine operating wind speed being greater than or equal to the first pitch switching wind speed, so that the wind turbine can operate in a second typhoon-resistant mode, wherein the first pitch switching wind speed is a critical wind speed indicating the switching of the leading edge of the wind turbine blades from windward to trailing edge windward.

2. The adaptive pitch control method according to claim 1, characterized in that, The step of performing pitch control based on a first mode on the wind turbine in response to the weather warning wind speed being less than or equal to the first preset wind speed includes: In response to the weather warning wind speed being less than or equal to the first preset wind speed and the current unit operating wind speed being less than the first pitch switching wind speed, pitch control based on the first mode is performed on the wind turbine, so that the wind turbine can operate in the first typhoon resistance mode.

3. The adaptive pitch control method according to claim 1, characterized in that, The steps of performing pitch control based on the second mode on the wind turbine include: When the operating power of the wind turbine meets predetermined conditions, the blade pitch angle of the wind turbine is switched from the first blade pitch angle combination to the second blade pitch angle combination. The first blade pitch angle combination is the optimized stopping pitch angle combination of the blades, and the second blade pitch angle combination is the optimized pitch angle combination of the blades corresponding to the trailing edge wind.

4. The adaptive pitch control method according to claim 3, characterized in that, After the step of performing pitch control based on the second mode on the wind turbine in response to the weather warning wind speed being greater than the first preset wind speed, the adaptive pitch control method further includes: In response to the current unit operating wind speed being less than the second pitch switching wind speed for a preset duration, determine whether the weather warning wind speed is less than the first preset wind speed; In response to the weather warning wind speed being less than the first preset wind speed, pitch control based on the first mode is performed on the wind turbine. In response to the weather warning wind speed being greater than or equal to the first preset wind speed, the wind turbine continues to perform pitch control based on the second mode. The second pitch switching wind speed is the critical wind speed at which the trailing edge of the wind turbine blades switches to leading edge wind.

5. The adaptive pitch control method according to claim 4, characterized in that, In response to the weather warning that the wind speed is less than the first preset wind speed, the step of performing pitch control on the wind turbine based on the first mode includes: In response to the weather warning wind speed being less than the first preset wind speed, the blade pitch angle of the wind turbine is switched from the second blade pitch angle combination to the first blade pitch angle combination.

6. The adaptive pitch control method according to claim 4, characterized in that, The adaptive pitch control method further includes: In response to the situation where the current operating wind speed of the wind turbine is not lower than the second pitch switching wind speed for a preset duration, the wind turbine continues to perform pitch control based on the second mode.

7. The adaptive pitch control method according to claim 1, characterized in that, The adaptive pitch control method further includes: Obtain the operating wind speed of the wind turbine unit; In response to the identification of a fault in the wind turbine and the current operating wind speed of the turbine being less than or equal to a preset fault maintenance wind speed, pitch control based on a third mode is performed on the wind turbine. In response to the detection that the wind turbine has malfunctioned and the current operating wind speed of the turbine is greater than the preset fault maintenance wind speed, pitch control based on the fourth mode is executed on the wind turbine. The third mode indicates the third pitch control operation state for upwind / downwind alignment used for fault maintenance, and the fourth mode indicates the fourth pitch control operation state for upwind / downwind alignment used for fault resistance against typhoons.

8. An adaptive pitch control device for a wind turbine generator, characterized in that, The adaptive pitch control device includes: The data acquisition module is configured to acquire wind turbine unit operating data and meteorological warning wind speeds; The fault identification module is configured to identify whether the wind turbine has malfunctioned based on the unit's operating data. The pitch control module is configured to: in response to identifying that the wind turbine has not malfunctioned, determine whether the weather warning wind speed is greater than a first preset wind speed; in response to the weather warning wind speed being less than or equal to the first preset wind speed, perform pitch control on the wind turbine based on a first mode; and in response to the weather warning wind speed being greater than the first preset wind speed, perform pitch control on the wind turbine based on a second mode. The first mode indicates a first pitch control operation state with the upwind leading edge facing the wind, and the second mode indicates a second pitch control operation state with the upwind trailing edge facing the wind. The operation of performing pitch control based on the second mode on the wind turbine in response to the weather warning wind speed being greater than the first preset wind speed includes: acquiring the wind turbine's operating wind speed; and performing pitch control based on the second mode on the wind turbine in response to the weather warning wind speed being greater than the first preset wind speed and the current operating wind speed being greater than or equal to the first pitch switching wind speed, so that the wind turbine can operate in a second typhoon-resistant mode, wherein the first pitch switching wind speed is a critical wind speed indicating the switching of the leading edge of the wind turbine blades from windward to trailing edge windward.

9. A computer program product, characterized in that, The computer program product includes a computer program / instruction that, when executed by a processor, implements the adaptive pitch control method as described in any one of claims 1 to 7.

10. A computer device, characterized in that, include: At least one processor; At least one memory that stores computer-executable instructions. The computer-executable instructions, when executed by the at least one processor, cause the at least one processor to perform the adaptive pitch control method as described in any one of claims 1 to 7.

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