Control methods for wind turbine generator sets and wind turbine generator sets

Abstract

This disclosure provides a control method for a wind turbine generator set and a wind turbine generator set. The control method includes: acquiring predicted wind speed data for a predetermined period of the environment in which the wind turbine generator set is located; determining a target wind speed range by matching the predicted wind speed data with a preset wind speed range; determining the current pitch mode and the current yaw mode corresponding to the target wind speed range based on the target wind speed range; determining the current pitch angle of each blade of the wind turbine generator set based on the pitch mode, so as to control each blade to pitch to the pitch angle combination corresponding to the pitch mode; and controlling the wind turbine generator set to yaw to the position corresponding to the yaw mode based on the yaw mode. This disclosure solves the problem of poor load reduction effect of the generator set, and can execute different pitch and yaw control strategies according to the wind speed range to ensure that the expected load reduction effect can be achieved under various wind speed conditions, thereby improving the safety and stability of the generator set.

Description

Technical Field

[0001] This disclosure relates to the field of wind power generation, and more specifically, to a control method for a wind turbine generator set and a wind turbine generator set. Background Technology

[0002] As the rotor diameter and overall capacity of wind turbine generators increase, the requirements for the reliability and safety of the units are also becoming higher.

[0003] To ensure the safety of the wind turbine, the load on the turbine can be reduced by controlling the blade pitch. In related technologies, blade pitch control is typically based on real-time wind speed to achieve load reduction. However, due to different control algorithms, the control results of blade pitch control may vary, making it difficult to achieve the desired load reduction effect under certain wind speed conditions. Furthermore, real-time pitch control may have a certain lag, making it difficult to respond promptly to changes in ambient wind speed. Summary of the Invention

[0004] In view of the problem that the load reduction effect of the unit in the control of the related technology is not good, this disclosure provides a control method for wind turbine generator set and a wind turbine generator set.

[0005] The first aspect of this disclosure provides a control method for a wind turbine generator set. The control method includes: acquiring predicted wind speed data for a predetermined period of the environment in which the wind turbine generator set is located; determining a target wind speed interval by matching the predicted wind speed data with a preset wind speed interval, wherein the preset wind speed interval includes at least four wind speed intervals; determining a current pitch mode and a current wind-facing mode corresponding to the target wind speed interval, wherein the wind-facing mode represents the wind-facing position of the wind turbine generator set; determining the current pitch angle of each blade of the wind turbine generator set based on the pitch mode, so as to control each blade to pitch to a pitch angle combination corresponding to the pitch mode; and controlling the wind turbine generator set to yaw to a position corresponding to the wind-facing mode based on the wind-facing mode.

[0006] Optionally, the preset wind speed range includes a first wind speed range, the pitch mode includes a first pitch mode corresponding to the first wind speed range, and the wind-fighting mode includes a first wind-fighting mode corresponding to the first wind speed range. The first wind speed range is determined based on both the maximum load that the wind turbine can bear in a first state and the maximum load that it can bear in a second state. In the first state, the pitch angle of at least one blade of the wind turbine is smaller than the pitch angle of at least one blade of the wind turbine in the second state.

[0007] Optionally, in the first wind-facing mode, the wind turbine is in an upwind facing position. In the first pitch mode, at least one blade of the wind turbine has a pitch angle in the range of approximately 40° to 70°, and the other blades of the wind turbine are in a feathered position. The first state refers to the wind turbine being in an upwind facing position and the pitch angles of the blades forming a first combination. The second state refers to the wind turbine being in an upwind facing position and the pitch angles of the blades forming a second combination. In the first combination, the pitch angle of one blade of the wind turbine is in the range of approximately 0° to 40°, and the other blades of the wind turbine are in a feathered position. In the second combination, the pitch angle of one blade of the wind turbine is in the range of approximately 40° to 70°, and the other blades of the wind turbine are in a feathered position.

[0008] Optionally, the preset wind speed range further includes a second wind speed range, the pitch mode includes a second pitch mode corresponding to the second wind speed range, and the first wind-following mode also corresponds to the second wind speed range. The second wind speed range is an adjacent range lower than the first wind speed range. In the second pitch mode, the pitch angle of at least one blade of the wind turbine is in the range of approximately 0° to 40°, and the other blades of the wind turbine are in a feathered position.

[0009] Optionally, the preset wind speed range also includes a third wind speed range, and the first pitch mode also corresponds to the third wind speed range. The wind-following mode includes a second wind-following mode corresponding to the third wind speed range. In the second wind-following mode, the wind turbine is in a downwind wind-following position. The third wind speed range is an adjacent range higher than the first wind speed range. The third wind speed range is determined based on the maximum load that the wind turbine can bear in the third state. The third state refers to the wind turbine being in a downwind wind-following position and the blade pitch angle combination being a second combination. In the second combination, the pitch angle of one blade of the wind turbine is in the range of approximately 40° to 70°, and the other blades of the wind turbine are in a feathering position.

[0010] Optionally, the preset wind speed range also includes a fourth wind speed range, the pitch mode includes a third pitch mode corresponding to the fourth wind speed range, and the second wind-adaptive mode also corresponds to the fourth wind speed range. The fourth wind speed range is an adjacent range higher than the third wind speed range. In the third pitch mode, all blades of the wind turbine are in a feathered position.

[0011] Optionally, the control method further includes: controlling each blade to lock in response to the current pitch mode being the third pitch mode.

[0012] Optionally, the control method is executed by the main control system of the wind turbine generator during operation. The main control system is connected to the centralized control system of the wind farm where the wind turbine generator is located. The control method further includes: when the wind turbine generator is connected to the power grid, in response to receiving an anti-vortex command from the centralized control system, performing the step of acquiring predicted wind speed data for a predetermined period of the environment where the wind turbine generator is located, based on the power supply from the power grid; when the wind turbine generator is disconnected from the power grid, in response to receiving the anti-vortex command through a satellite communication system, activating the backup power source of the wind turbine generator and performing the step of acquiring predicted wind speed data for a predetermined period of the environment where the wind turbine generator is located.

[0013] Optionally, the control method is executed by the main control system of the wind turbine generator set when the wind turbine generator set has been commissioned and is not connected to the power grid. The main control system is connected to the centralized control system of the wind farm where the wind turbine generator set is located. The control method further includes: when the wind turbine generator set has been commissioned and communication between the wind turbine generator set and the centralized control system is normal, in response to receiving an anti-vortex command from the centralized control system, activating the backup power source of the wind turbine generator set and performing the step of acquiring predicted wind speed data for a predetermined period of the environment where the wind turbine generator set is located; and when the wind turbine generator set has been commissioned and communication between the wind turbine generator set and the centralized control system is abnormal, in response to receiving the anti-vortex command from the tower control unit of the wind turbine generator set, activating the backup power source of the wind turbine generator set and performing the step of acquiring predicted wind speed data for a predetermined period of the environment where the wind turbine generator set is located.

[0014] Optionally, the control method is executed by the main control system of the wind turbine generator set when the wind turbine generator set has been installed but not yet started commissioning. The control method further includes: when the wind turbine generator set has been installed but not yet started commissioning, in response to receiving an anti-vortex command from the tower base control unit of the wind turbine generator set, activating the backup power of the wind turbine generator set, controlling the yaw of the wind turbine generator set according to the wind mode indicated in the anti-vortex command, and determining the current pitch angle of each blade of the wind turbine generator set according to the pitch mode indicated in the anti-vortex command, so as to control the pitch of each blade.

[0015] A second aspect of this disclosure provides a wind turbine generator set, the wind turbine generator set comprising: a processor; and a memory for storing processor-executable instructions, wherein the processor-executable instructions, when executed by the processor, cause the processor to perform a control method for the wind turbine generator set according to this disclosure.

[0016] According to the control method of the wind turbine generator disclosed herein, the wind turbine generator can acquire predicted wind speed data for a predetermined period, and determine the current pitch mode and the current wind-fighting mode based on the wind speed range in which the predicted wind speed data is located, so as to control the yaw of the generator and control the pitch of each blade. The wind-fighting mode represents the wind-fighting position of the generator and the wind-fighting position of each blade. Different pitch modes correspond to different wind speed ranges, and different pitch angle combinations correspond to different pitch modes. This allows different pitch and yaw control strategies to be executed according to the wind speed range, ensuring that the expected load reduction effect can be achieved under various wind speed conditions, and avoiding the problem of control lag and failure to reduce load in time caused by pitching according to real-time wind speed, thereby improving the safety and stability of the generator. Attached Figure Description

[0017] Figure 1 This is a schematic flowchart illustrating a control method for a wind turbine generator set according to an exemplary embodiment of the present disclosure.

[0018] Figure 2 This is a flowchart illustrating an example of a control strategy for a wind turbine generator set after power-on, according to an exemplary embodiment of the present disclosure.

[0019] Figure 3 This is a flowchart illustrating an example of a control strategy for a wind turbine generator set before power-on, according to an exemplary embodiment of the present disclosure.

[0020] Figure 4 This is a flowchart illustrating an example of a control strategy in a wind turbine generator control method according to an exemplary embodiment of the present disclosure before the start of generator commissioning. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] As used herein, the term “and / or” includes any one of the associated listed items and any combination of any two or more.

[0024] Although terms such as “first,” “second,” and “third” may be used herein to describe various components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts should not be limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Thus, without departing from the teaching of the examples described herein, the first component, first assembly, first region, first layer, or first part referred to as the first component, first assembly, first region, first layer, or first part may also be referred to as the second component, second assembly, second region, second layer, or second part.

[0025] In the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to," or "bonded to" another element, the element may be directly "on" another element, directly "connected to," or "bonded to" the other element, or one or more other elements may be present in between. Conversely, when an element is described as being "directly on" another element, "directly connected to," or "directly bonded to" another element, no other elements may be present in between.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] In view of the problems described above, this disclosure provides a control method for a wind turbine generator set, a wind turbine generator set, a computer-readable storage medium, and a computer program product to solve or at least alleviate the above problems.

[0030] According to a first aspect of an exemplary embodiment of the present disclosure, a control method for a wind turbine generator is provided. This control method may be executed, for example, by a computer device within the wind turbine generator. The computer device executing the control method may be, for example, a terminal device or a server, wherein the terminal device may be such as a tablet computer, a laptop computer, a digital assistant, etc.; the server may be a standalone server, a server cluster, a cloud computing platform, or a virtualization center.

[0031] Here, computer equipment can be installed at the wind turbine generator or wind farm, and can be communicatively connected to the measuring device or data center of the wind turbine generator or wind farm, so as to obtain the data required to perform the above methods, such as measuring the pitch angle and predicting the wind speed.

[0032] According to embodiments of this disclosure, the control method may include the following steps:

[0033] like Figure 1 As shown, in step S110, predicted wind speed data for a predetermined period of time in the environment where the wind turbine is located can be obtained.

[0034] As an example, the scheduled period can be a future scheduled time period, such as the next 12 hours, and the predicted wind speed data can be, for example, weather warning wind speed data or data based on weather warning wind speed data.

[0035] Weather warning wind speed data can come from any weather forecast data source worldwide, such as a regional weather bureau or weather center.

[0036] As an example, the predicted wind speed data can be the maximum weather warning wind speed within a predetermined period, but it is not limited to this. For example, it can also be a statistical value of the maximum preset number of weather warning wind speed data within a predetermined period, such as the average value.

[0037] In step S120, the target wind speed range where the predicted wind speed data is located can be determined by matching the predicted wind speed data with the preset wind speed range. The preset wind speed range may include at least four wind speed ranges.

[0038] As an example, a preset wind speed range can be defined based on the state of the wind turbine generator set. Here, the state of the generator set can include the generator set's windward position and the combination of the blade pitch angles. By simultaneously considering both the generator set's windward position and the blade pitch angles, the load-bearing capacity of the generator set in its current state can be assessed more comprehensively, thereby determining the wind speed that the generator set can handle in its current state. Here, the pitch angle can, for example, refer to the angle between the airfoil chord at the blade tip and the plane of rotation.

[0039] In step S130, the current pitch mode and the current wind-fighting mode corresponding to the target wind speed range can be determined according to the target wind speed range, wherein the wind-fighting mode indicates the wind-fighting position of the wind turbine generator.

[0040] As mentioned above, multiple wind speed ranges can be preset, and different pitch modes can correspond to different wind speed ranges. One or more of the multiple wind speed ranges can correspond to a single pitch mode, and the pitch mode can represent the combination of pitch angles of each blade of the wind turbine generator. Furthermore, at least two of the aforementioned multiple wind speed ranges correspond to different wind patterns.

[0041] Here, wind speed ranges can be defined based on the load-bearing capacity of the unit under different windward positions and pitch angles. When the predicted wind speed data falls within the target wind speed range of the preset wind speed range, the pitch control mode and windward mode corresponding to the target wind speed range can be determined.

[0042] In the embodiments of this disclosure, the wind turbine generator set can maintain the angle between the turbine nose and the wind direction at a preset target angle in real time through yaw action, based on real-time wind direction changes. Given a preset windward angle, the generator set automatically performs windward maneuvers. The windward position of the generator set can include an upwind windward position and a downwind windward position. Here, the upwind windward position can be, for example, the nacelle 0° windward position, with the aforementioned preset target angle being 0°; the downwind windward position can be, for example, the nacelle 180° windward position, with the aforementioned preset target angle being 180°. The pitch angle of each blade can be changed between a feathering position and an open position. Here, the feathering position can refer to a position near a 90° pitch angle, for example, within the range of 90° ± 5°.

[0043] Different pitch modes correspond to different pitch angle combinations, which refer to the combination of pitch angles between the blades of a wind turbine. Taking a three-bladed turbine as an example, the pitch angle combinations can be X1, X2, and X3, where X1, X2, and X3 represent the pitch angles of the three blades, respectively. Here, the order of the blades is not distinguished for each pitch angle combination.

[0044] As an example, the wind speed range may include a first wind speed range, the pitch mode may include a first pitch mode corresponding to the first wind speed range, and the windward mode may include a first windward mode corresponding to the first wind speed range.

[0045] Here, the first wind speed range can be determined based on both the maximum load that the wind turbine can bear in the first state and the maximum load that it can bear in the second state. In the first state, the pitch angle of at least one blade of the wind turbine can be smaller than the pitch angle of at least one blade of the wind turbine in the second state.

[0046] Since the load capacity of the unit varies with different blade pitch angles, a first wind speed range can be defined by differentiating the pitch angle of at least one blade. When the predicted wind speed data falls within this range, the unit's state can be restricted between the first and second states, or the pitch angle combination can be restricted between the pitch angle combination of the first state and the pitch angle combination of the second state. This ensures that blade pitch adjustment reduces the load on the unit.

[0047] In the embodiments of this disclosure, the maximum load that the wind turbine generator set can withstand can be determined based on the load level of the unit itself and the load-bearing capacity of each mechanical component. For example, the load-bearing capacity of the unit at each yaw position and the blades at each pitch angle position can be determined by simulation based on the design parameters of the unit.

[0048] As an example, in the first and second states, the windward positions of the turbine and blades can be the same; for instance, the turbine can be in an upwind position, but the pitch angle combinations are different. The first state can refer to the wind turbine being in an upwind position with the first combination of blade pitch angles, while the second state can refer to the wind turbine being in an upwind position with the second combination of blade pitch angles.

[0049] For example, the lower limit of the first wind speed range can be determined based on the maximum load that the unit can bear in the first state, and its upper limit can be determined based on the maximum load that the unit can bear in the second state. In the first combination, the pitch angle of one blade of the wind turbine can be in the range of approximately 0° to 40°, and the other blades of the wind turbine can be in the feathering position; in the second combination, the pitch angle of one blade of the wind turbine can be in the range of approximately 40° to 70°, and the other blades of the wind turbine can be in the feathering position.

[0050] The pitch angle can be selected within the above range, and simulation can be performed based on the selected pitch angle to obtain the maximum load that the unit can withstand, for example, the maximum load that can be withstood in the second state. The first combination can be, for example, 90°, 90° and 30°, and the second combination can be, for example, 90°, 90° and 70°.

[0051] In the first upwind mode, the wind turbine is positioned upwind. In the first pitch mode, the pitch angle of at least one blade of the wind turbine can be in the range of approximately 40° to 70°, while the other blades are in a feathered position. For example, in a three-bladed turbine, the pitch angle combination can be 90°, 90°, and 70°. This ensures that the turbine can handle load reduction requirements at any wind speed within the first wind speed range in the first pitch mode, guaranteeing the turbine's safety.

[0052] As an example, the wind speed range may also include a second wind speed range, the pitch mode may include a second pitch mode corresponding to the second wind speed range, and the first wind mode also corresponds to the second wind speed range.

[0053] Here, the second wind speed range can be an adjacent range lower than the first wind speed range. For example, the upper limit of the second wind speed range can be equal to the lower limit of the first wind speed range.

[0054] In the second pitch mode corresponding to the second wind speed range, the pitch angle of at least one blade of the wind turbine can be in the range of approximately 0° to 40°, while the other blades of the wind turbine can be in a feathered position. For example, in a three-bladed configuration, the pitch angle combination can be 90°, 90°, and 30°. Here, the maximum load that the unit can withstand in the second mode can be the same as the maximum load that the unit can withstand in the first state described above.

[0055] Using the above method, an adjacent second wind speed range can be determined based on the first wind speed range, and the response load in the second mode corresponding to the second wind speed range obtained in the simulation for the first wind speed range can be obtained, thereby simplifying the division of wind speed ranges and facilitating the determination of the pitch mode.

[0056] As an example, the wind speed range may also include a third wind speed range, the first pitch mode may also correspond to the third wind speed range, and the wind-facing mode may include a second wind-facing mode corresponding to the third wind speed range. In the second wind-facing mode, the wind turbine is located in a downwind wind-facing position.

[0057] The third wind speed range can be an adjacent range higher than the first wind speed range. The third wind speed range can be determined based on the maximum load that the wind turbine can bear in the third state. The third state can refer to the wind turbine being in a downwind position and the blade pitch angle combination being the second combination.

[0058] For example, the lower limit of the third wind speed range can be the upper limit of the first wind speed range, and the upper limit of the first wind speed range can be determined based on the maximum load that the wind turbine can bear in the third state.

[0059] When the predicted wind speed data falls within this wind speed range, the first pitch control mode can also be used to control the pitch. However, the third wind speed range, which is higher than the first wind speed range, can be countered by adjusting the windward position of the turbine and blades. Specifically, by yawing the turbine to the downwind windward position, the load on the turbine can be reduced without changing the pitch mode (such as the first pitch mode), so as to ensure the stability and safety of the turbine as much as possible.

[0060] As an example, the wind speed range may also include a fourth wind speed range, the pitch mode may include a third pitch mode corresponding to the fourth wind speed range, and the second convective mode also corresponds to the fourth wind speed range.

[0061] Here, the fourth wind speed range is the adjacent range that is higher than the third wind speed range. For example, the lower limit of the fourth wind speed range can be the upper limit of the third wind speed range.

[0062] In the third pitch mode, all blades of the wind turbine can be in the feather position. For example, with three blades, the pitch angle combination can be 91°, 91° and 91°. The windward position of the turbine and blades can still be in the second windward mode. In this way, while maintaining downwind windward position, the turbine can cope with higher wind speed ranges and reduce the load on the turbine by adjusting the blade pitch.

[0063] Furthermore, in this example, in response to the current pitch mode being the third pitch mode, individual blades can be locked. Specifically, when the predicted wind speed data is in a relatively high wind speed range, to further ensure the safety of the unit, the blades can be pitched to the feather position and each blade can be locked to prevent the blades from disengaging from the feather position under the influence of wind when the wind speed is too high, thus preventing the loss of load reduction effect. Here, the blade locking action can be related only to the pitch mode and not to the wind direction mode, thereby further ensuring that the blades can remain in the feather position in the third pitch mode.

[0064] Furthermore, when wind speeds exceed the first wind speed range, the turbine can adopt a downwind alignment mode to meet the component load-bearing requirements under extremely high wind speeds. However, in this state, directly using the third pitch mode for vortex suppression requires maintaining the turbine's windward deviation within a relatively small range, placing higher demands on the yaw system and resulting in more yaw maneuvers, potentially impacting its lifespan. Recognizing this, in the embodiments of this disclosure, wind speed scenarios exceeding the first wind speed range are further divided into a third and a fourth wind speed range. With this strategy, when wind speeds are in the third wind speed range, the turbine can adopt the same pitch mode (e.g., the first pitch mode) as in the first wind speed range for vortex suppression. This attitude can adapt to larger windward deviations, thus lowering the reliability requirements and frequency of yaw system maneuvers, effectively improving the turbine's reliability in downwind alignment mode and enhancing the robustness of the turbine's yaw system. This refinement of the higher wind speed ranges ensures vortex suppression and load reduction while minimizing turbine maneuvers during wind speed changes.

[0065] For example, the control method further includes: in response to the target wind speed range where the predicted wind speed data is located changing from the first wind speed range to the second wind speed range, while keeping the pitch mode unchanged (e.g., the pitch angle of each blade remains unchanged), controlling the wind turbine generator set to switch the wind-facing mode from the first wind-facing mode to the second wind-facing mode, for example, controlling the wind turbine generator set to yaw from the upwind wind-facing position to the downwind wind-facing position.

[0066] In step S140, the current pitch angle of each blade of the wind turbine can be determined based on the current pitch mode, so as to control the pitch angle combination of each blade with the pitch mode.

[0067] In step S150, the wind turbine can be controlled to yaw to a position corresponding to the current wind pattern.

[0068] Once the wind pattern and pitch pattern corresponding to the current predicted wind speed data are determined, the yaw and blade pitch can be controlled. Here, the yaw action can be achieved through the yaw system of the unit, and the pitch action can be achieved through the pitch system of the unit. In addition, control can refer to moving the unit or blade to the target position, or it can refer to maintaining the unit or blade at the target position when it is already at the target position.

[0069] As an example, in step 130 above, during the process of determining the convective mode and pitch mode based on the wind speed range, the convective mode and pitch mode can be considered separately according to the wind speed range. There is no coupling relationship between the convective mode and pitch mode in terms of mode switching logic. However, according to the embodiments of this disclosure, the convective action and pitch action can be coupled in terms of the order of action execution. The pitch action can be completed first, and then the yaw action can be executed.

[0070] Specifically, the process can begin by controlling each blade to pitch angle combinations corresponding to the pitch mode, followed by controlling the wind turbine to yaw to the position corresponding to the wind-facing mode. For example, in response to predicted wind speed data falling within the third wind speed range, the turbine can switch to the second wind-facing mode and the first pitch mode. In this case, the turbine must first perform a pitch mode switch, and only after completing the first pitch mode switch can it switch to the second wind-facing mode.

[0071] This sequence of actions is primarily based on considerations of the unit's vortex resistance and load reduction, avoiding the risk of vortex-induced vibration or overload during pitch mode switching after the unit has yawed to the designated windward angle position. For example, if the predicted wind speed data suddenly drops from the fourth wind speed range to the first wind speed range, the unit needs to switch from a combination of the second windward mode and the third pitch mode to a combination of the first windward mode and the first pitch mode. If the unit switches to the windward mode first, a combination of the first windward mode and the third pitch mode will appear before the pitch mode switch. Since the third pitch mode has a worse vortex resistance, this increases the risk of vortex-induced vibration in this state. Similarly, if the predicted wind speed suddenly increases from the first wind speed range to the fourth wind speed range, the unit needs to switch from the combination of the first convex mode and the first pitch mode to the combination of the second convex mode and the third pitch mode. If the unit switches to the convex mode first, the unit will have the combination of the second convex mode and the first pitch mode before switching to the pitch mode. Since the load level of the first pitch mode is higher than that of the third pitch mode at the same wind speed, it will increase the risk of the unit exceeding the load limit in this state.

[0072] By using the above methods, different unit attitudes, including wind-fighting mode and pitch mode, can be selected based on different wind speed scenarios, so that the unit is in different load-reduction states. This can cope with different degrees of wind load and ensure that the unit can adaptively achieve yaw and pitch control under wind speed changes. This reduces the risk of vortex-induced vibration of the whole unit and improves the reliability of the unit while ensuring the load-bearing requirements of the unit's major components.

[0073] Furthermore, although the preset wind speed range described above includes four wind speed ranges, the embodiments of this disclosure are not limited to this. Any of the wind speed ranges can be further subdivided, and the corresponding pitch mode can be further subdivided. For example, the range of pitch angle can be further subdivided.

[0074] In addition to the adaptive unit attitude control method described above, the embodiments of this disclosure also consider using different methods to activate the above control method in different application scenarios.

[0075] Specifically, in one example, the control method can be executed by the main control system of the wind turbine during the operation of the wind turbine, which can be connected to the centralized control system (also known as the "central control system" or "central control center") of the wind farm where the wind turbine is located.

[0076] In this case, the control method may further include: when the wind turbine is connected to the power grid, in response to receiving an anti-vortex command from the centralized control system, based on the power supply from the power grid, performing a step of acquiring predicted wind speed data for a predetermined period of the environment in which the wind turbine is located, such as step S110 above; when the wind turbine is disconnected from the power grid, in response to receiving an anti-vortex command through the satellite communication system, activating the backup power of the wind turbine, and performing a step of acquiring predicted wind speed data for a predetermined period of the environment in which the wind turbine is located, such as step S110 above.

[0077] Figure 2 An example flow diagram of the control strategy after the wind turbine generator is powered on is shown in the control method of an exemplary embodiment of the present disclosure.

[0078] like Figure 2 As shown, when the unit is powered on and in operation, in step S201, it can be determined whether the wind turbine generator is disconnected from the grid or whether the grid has lost power. If the power connection is disconnected or the grid has lost power, in step S202, in response to receiving an anti-vortex command through a satellite communication system such as the Beidou satellite navigation system, the backup power of the wind turbine generator can be started, and step S204 is executed.

[0079] Here, the anti-vortex command can be a command used to initiate the aforementioned control methods, which can be transmitted to the unit's main control system via a satellite communication system, either manually or automatically. Furthermore, backup power can be, for example, but not limited to, a diesel generator located at the base of the wind turbine tower.

[0080] If the electrical connection is normal or the power grid is not down, in step S203, in response to receiving an anti-vortex command from the centralized control system, step S204 can be executed based on the power supply from the power grid. Here, the centralized control system can be, for example, a centralized control system for controlling multiple wind turbine generators in a wind farm, which can communicate with the main control system of each generator to send control commands.

[0081] In response to receiving an anti-vortex command from a satellite communication system or a centralized control system, in step S204, the predicted wind speed data for a predetermined period of the environment where the wind turbine is located can be obtained, and it can be determined whether the predicted wind speed data is lower than a first wind speed range, for example, whether the maximum predicted wind speed V is less than the first anti-vortex switching wind speed V1 (e.g., the lower limit of the first wind speed range). In response to V being less than V1, in step S205, the first wind-resistant mode and the second pitch mode can be automatically executed. In response to V being greater than or equal to V1, in step S206, it can be determined whether the predicted wind speed data is within the first wind speed range, for example, whether the maximum predicted wind speed V is less than the upwind resistant wind speed V0 (e.g., the upper limit of the first wind speed range).

[0082] In response to V being less than V0, in step S207, the first wind-adaptive mode and the first pitch-adaptive mode can be executed automatically; in response to V being greater than or equal to V0, in step S208, it can be determined whether the predicted wind speed data is in a third wind speed range higher than the first wind speed range, for example, whether the maximum predicted wind speed V is less than the second anti-vortex switching wind speed V2 (for example, the upper limit of the third wind speed range).

[0083] In response to V being less than V2, in step S209, the second wind-pairing mode and the first pitch mode can be executed automatically; in response to V being greater than or equal to V2, in step S210, it can be assumed that the current maximum predicted wind speed V is higher than the third wind speed range, for example, it is in the fourth wind speed range, and the second wind-pairing mode and the third pitch mode can be executed automatically, and each blade can also be automatically locked.

[0084] Through the above methods, during unit operation, regardless of whether the power grid can provide power support, the adaptive unit attitude control method described above can be realized, enabling the unit to perform load reduction actions according to wind speed changes even when the power grid fails, thus ensuring the safety of the unit.

[0085] In another example, the control method can also be executed by the main control system of the wind turbine generator when the wind turbine generator has been commissioned and is not connected to the grid. The control method may further include: when the wind turbine generator has been commissioned and the communication between the wind turbine generator and the central control system is normal, in response to receiving an anti-vortex command from the central control system, activating the backup power of the wind turbine generator and performing the step of acquiring predicted wind speed data for a predetermined period of the environment in which the wind turbine generator is located, such as step S110 above; when the wind turbine generator has been commissioned and the communication between the wind turbine generator and the central control system is abnormal, in response to receiving an anti-vortex command from the tower control unit of the wind turbine generator, activating the backup power of the wind turbine generator and performing the step of acquiring predicted wind speed data for a predetermined period of the environment in which the wind turbine generator is located, such as step S110 above.

[0086] Figure 3 An example flow diagram of the control strategy for a wind turbine generator set before power-on after commissioning is shown in an exemplary embodiment of the present disclosure.

[0087] like Figure 3 As shown, after the unit completes static commissioning and before powering on, in step S301, it can be determined whether the wind turbine generator set and the central control system have established a communication connection. If a communication connection is established, in step S302, in response to receiving an anti-vortex command from the central control system, the backup energy source of the wind turbine generator set (such as a diesel generator) can be started, and step S304 can be executed.

[0088] In the event of a communication failure or malfunction with the central control system, in step S303, in response to receiving an anti-vortex command from the tower base control unit of the wind turbine generator, the backup power source of the wind turbine generator can be activated, and step S304 can be executed. Here, the tower base control unit can be controlled, for example, manually or automatically, to send the anti-vortex command to the main control system.

[0089] In response to receiving an anti-vortex command from a satellite communication system or a tower control unit, in step S304, predicted wind speed data for a predetermined period of the environment where the wind turbine is located can be obtained, and it can be determined whether the predicted wind speed data is lower than a first wind speed range, for example, whether the maximum predicted wind speed V is less than the first anti-vortex switching wind speed V1 (e.g., the lower limit of the first wind speed range). In response to V being less than V1, in step S305, the first wind-resistant mode and the second pitch mode can be automatically executed. In response to V being greater than or equal to V1, in step S306, it can be determined whether the predicted wind speed data is within the first wind speed range, for example, whether the maximum predicted wind speed V is less than the upwind resistant wind speed V0 (e.g., the upper limit of the first wind speed range).

[0090] In response to V being less than V0, in step S307, the first wind-adaptive mode and the first pitch mode can be executed automatically; in response to V being greater than or equal to V0, in step S308, it can be determined whether the predicted wind speed data is in a third wind speed range higher than the first wind speed range, for example, whether the maximum predicted wind speed V is less than the second anti-vortex switching wind speed V2 (for example, the upper limit of the third wind speed range).

[0091] In response to V being less than V2, in step S309, the second wind-pairing mode and the first pitch mode can be executed automatically; in response to V being greater than or equal to V2, in step S310, it can be assumed that the current maximum predicted wind speed V is higher than the third wind speed range, for example, it is in the fourth wind speed range, and the second wind-pairing mode and the third pitch mode can be executed automatically, and each blade can also be locked automatically.

[0092] In this way, even when the unit is not powered on, the adaptive unit attitude control method can still be activated through the centralized control system or the tower base control unit, so that the unit's main control system can perform load reduction actions according to wind speed changes, thus ensuring the safety of the unit.

[0093] In another example, the control method can also be executed by the main control system of the wind turbine generator set when the wind turbine generator set has been installed but has not yet started commissioning. The control method can also include: when the wind turbine generator set has been installed but has not yet started commissioning, in response to receiving an anti-vortex command from the tower control unit of the wind turbine generator set, activating the backup power of the wind turbine generator set, controlling the yaw of the wind turbine generator set according to the wind mode indicated in the anti-vortex command, and determining the current pitch angle of each blade of the wind turbine generator set according to the pitch mode indicated in the anti-vortex command, so as to control the pitch of each blade.

[0094] Figure 4 An example flow diagram of the control strategy in the state where the wind turbine generator set has been installed but commissioning has not yet begun, according to an exemplary embodiment of the present disclosure, is shown.

[0095] like Figure 4 As shown, when the unit is installed but not yet commissioned, the backup power source of the wind turbine can be activated in response to the anti-vortex command received from the tower base control unit of the wind turbine.

[0096] As an example, anti-vortex commands may include a first command, a second command, a third command, and a fourth command, wherein the first command may correspond to wind conditions where the current predicted wind speed data is in the second wind speed range, the second command may correspond to wind conditions where the current predicted wind speed data is in the first wind speed range, the third command may correspond to wind conditions where the current predicted wind speed data is in the third wind speed range, and the fourth command may correspond to wind conditions where the current predicted wind speed data is in the fourth wind speed range.

[0097] In response to receiving a first command from the tower base control unit, in step S401, a first wind-following mode and a second pitch mode can be adopted; in response to receiving a second command from the tower base control unit, in step S402, a first wind-following mode and a first pitch mode can be adopted; in response to receiving a third command from the tower base control unit, in step S403, a second wind-following mode and a second pitch mode can be adopted; in response to receiving a fourth command from the tower base control unit, in step S404, a second wind-following mode and a third pitch mode can be adopted.

[0098] In this way, even if the unit has not entered the commissioning stage, the adaptive unit attitude control method can be realized through the tower base control unit, so as to ensure the safety of the unit even when it has not entered the commissioning stage.

[0099] According to the control method described above in the embodiments of this disclosure, the risk of vortex-induced vibration of the wind turbine generator set during different operating stages (e.g., hoisting, maintenance, idling) can be reduced. By finely dividing the wind speed scenario and performing different anti-vortex actions in a targeted manner, the risk of vortex-induced vibration of the entire unit can be reduced, thereby improving the safety and stability of the unit.

[0100] Furthermore, the control method described above according to the embodiments of this disclosure can reduce the constraints of the maximum wind speed with a 50-year return period (also known as "V50 wind speed") and typhoon wind speed on the overall design load and reliability of the machine.

[0101] According to a second aspect of the embodiments of the present disclosure, a wind turbine generator set is provided, which may include: a processor; and a memory for storing processor-executable instructions, wherein the processor-executable instructions, when executed by the processor, cause the processor to perform a control method for the wind turbine generator set according to the embodiments of the present disclosure.

[0102] For example, a wind turbine generator set may include a main control system, which may include computer equipment. Specifically, the control method of the wind turbine generator set described above can be executed by computer equipment.

[0103] As an example, a computer device can be a PC, tablet, personal digital assistant, smartphone, or other device capable of executing the aforementioned set of instructions. Here, a computer device is not necessarily a single electronic device, but can be any collection of devices or circuits capable of executing the aforementioned instructions (or instruction sets) individually or in combination. A computer device can also be part of an integrated control system or system manager, or can be configured to interface with a portable electronic device locally or remotely (e.g., via wireless transmission).

[0104] In computer devices, a processor may include a central processing unit (CPU), a graphics processing unit (GPU), a programmable logic device, a dedicated processor system, a microcontroller, or a microprocessor. By way of example and not limitation, a processor may also include an analog processor, a digital processor, a microprocessor, a multi-core processor, a processor array, a network processor, etc.

[0105] The processor can execute instructions or code stored in memory, which can also store data. Instructions and data can also be sent and received over a network via a network interface device, which can employ any known transport protocol.

[0106] Memory can be integrated with the processor; for example, RAM or flash memory can be housed within an integrated circuit microprocessor. Alternatively, memory can comprise a separate device, such as an external disk drive, storage array, or other storage device that can be used by any database system. Memory and processor can be operatively coupled, or can communicate with each other, for example, via I / O ports, network connections, etc., enabling the processor to read files stored in the memory.

[0107] In addition, computer equipment may include video displays (such as liquid crystal displays) and user interaction interfaces (such as keyboards, mice, touch input devices, etc.). All components of a computer device may be interconnected via buses and / or networks.

[0108] According to embodiments of the present disclosure, a computer-readable storage medium may also be provided, which, when the instructions in the computer-readable storage medium are executed by a processor of an electronic device, enables the electronic device to perform the control method for a wind turbine generator according to embodiments of the present disclosure.

[0109] Specifically, the wind turbine generator control method according to embodiments of the present disclosure can be programmed into a computer program and stored on a computer-readable storage medium. When the instructions in the computer-readable storage medium are executed by at least one processor, the at least one processor is caused to perform the wind turbine generator control method according to exemplary embodiments of the present disclosure. 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 a computer program and any associated data, data files, and data structures in a non-transitory manner and to provide the computer program and any associated data, data files, and data structures to a processor or computer so that the processor or computer can execute the computer program. In one example, the computer program and any associated data, data files, and data structures are distributed across a networked computer system, such that the computer program 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.

[0110] According to embodiments of the present disclosure, a computer program product may also be provided, which includes computer-executable instructions that, when executed by at least one processor, implement the control method for a wind turbine generator set according to embodiments of the present disclosure.

[0111] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the claims.

[0112] Furthermore, it should be noted that although several examples of each step have been described above with reference to the specific accompanying drawings, it should be understood that the embodiments of this disclosure are not limited to the combinations given in the examples. The steps appearing in different drawings can be combined, and the execution order of each step can be changed, which will not be exhaustive here.

[0113] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

[0114] The specific embodiments of this disclosure have been described in detail above. Although some embodiments have been shown and described, those skilled in the art should understand that modifications and variations can be made to these embodiments without departing from the principles and spirit of this disclosure, which are defined by the claims and their equivalents. Such modifications and variations should also be within the protection scope of the claims of this disclosure.

Claims

1. A control method for a wind turbine generator set, characterized in that, The control method includes: Obtain predicted wind speed data for a predetermined period of time for the environment where the wind turbine is located; By matching the predicted wind speed data with a preset wind speed range, the target wind speed range in which the predicted wind speed data is located is determined, wherein the preset wind speed range includes at least 4 wind speed ranges. Based on the target wind speed range, determine the current pitch mode and the current wind-fighting mode corresponding to the target wind speed range, wherein the wind-fighting mode indicates the wind-fighting position of the wind turbine generator set; Based on the pitch mode, the current pitch angle of each blade of the wind turbine is determined, so as to control each blade to pitch to the pitch angle combination corresponding to the pitch mode. Based on the aforementioned wind alignment mode, the wind turbine generator is controlled to yaw to the position corresponding to the wind alignment mode. The preset wind speed range includes a first wind speed range, the pitch mode includes a first pitch mode corresponding to the first wind speed range, and the wind-fighting mode includes a first wind-fighting mode corresponding to the first wind speed range. The first wind speed range is determined based on both the maximum load that the wind turbine generator can bear in the first state and the maximum load that it can bear in the second state. In the first state, the pitch angle of at least one blade of the wind turbine generator set is smaller than that of at least one blade of the wind turbine generator set in the second state.

2. The control method according to claim 1, characterized in that, In the first wind-facing mode, the wind turbine generator is positioned upwind. In the first pitch mode, the pitch angle of at least one blade of the wind turbine is in the range of 40° to 70°, while the other blades of the wind turbine are in a feathered position. The first state refers to the wind turbine being in an upwind position with the blades' pitch angles forming a first combination; the second state refers to the wind turbine being in an upwind position with the blades' pitch angles forming a second combination. In the first combination, the pitch angle of one blade of the wind turbine is in the range of 0° to 40°, and the other blades of the wind turbine are in a feathered position; in the second combination, the pitch angle of one blade of the wind turbine is in the range of 40° to 70°, and the other blades of the wind turbine are in a feathered position.

3. The control method according to claim 1, characterized in that, The preset wind speed range also includes a second wind speed range, and the pitch mode includes a second pitch mode corresponding to the second wind speed range. The first wind-fighting mode also corresponds to the second wind speed range. Wherein, the second wind speed range is an adjacent range lower than the first wind speed range, and in the second pitch mode, the pitch angle of at least one blade of the wind turbine is in the range of 0° to 40°, while the other blades of the wind turbine are in the feathering position.

4. The control method according to claim 1, characterized in that, The preset wind speed range also includes a third wind speed range, and the first pitch mode also corresponds to the third wind speed range. The wind-facing mode includes a second wind-facing mode corresponding to the third wind speed range. In the second wind-facing mode, the wind turbine is positioned downwind. The third wind speed range is an adjacent range higher than the first wind speed range. The third wind speed range is determined based on the maximum load that the wind turbine can bear in the third state. The third state refers to the wind turbine being in a downwind position and the blade pitch angle combination being the second combination. In the second combination, the pitch angle of one blade of the wind turbine is in the range of 40° to 70°, and the other blades of the wind turbine are in a feathered position.

5. The control method according to claim 4, characterized in that, The preset wind speed range also includes a fourth wind speed range, and the pitch mode includes a third pitch mode corresponding to the fourth wind speed range. The second wind-fighting mode also corresponds to the fourth wind speed range. The fourth wind speed range is an adjacent range that is higher than the third wind speed range. In the third pitch mode, all blades of the wind turbine are in the feathering position.

6. The control method according to claim 5, characterized in that, The control method further includes: In response to the current pitch mode being the third pitch mode, control each blade to lock.

7. The control method according to claim 1, characterized in that, The control method is executed by the main control system of the wind turbine generator set during operation. The main control system is connected to the centralized control system of the wind farm where the wind turbine generator set is located. The control method further includes: When the wind turbine is connected to the power grid, in response to receiving an anti-vortex command from the centralized control system, the step of acquiring predicted wind speed data for a predetermined period of the environment in which the wind turbine is located is performed based on the power supply from the power grid. In the event that the wind turbine is disconnected from the power grid, in response to receiving the anti-vortex command via the satellite communication system, the backup power source of the wind turbine is activated, and the step of acquiring predicted wind speed data for a predetermined period of the environment in which the wind turbine is located is performed.

8. The control method according to claim 1, characterized in that, The control method is executed by the main control system of the wind turbine generator set when the wind turbine generator set has been commissioned and is not connected to the power grid. The main control system is connected to the centralized control system of the wind farm where the wind turbine generator set is located. The control method further includes: When the wind turbine generator set is commissioned and the communication between the wind turbine generator set and the central control system is normal, in response to receiving an anti-vortex command from the central control system, the backup power source of the wind turbine generator set is activated, and the step of acquiring the predicted wind speed data for a predetermined period of the environment in which the wind turbine generator set is located is executed. In the event that the wind turbine generator set has been commissioned and communication between the wind turbine generator set and the central control system is abnormal, in response to receiving the anti-vortex command from the tower base control unit of the wind turbine generator set, the backup power source of the wind turbine generator set is activated, and the step of acquiring the predicted wind speed data for a predetermined period of the environment in which the wind turbine generator set is located is performed.

9. The control method according to claim 1, characterized in that, The control method is executed by the main control system of the wind turbine generator set when the wind turbine generator set has been installed but has not yet started commissioning. The control method also includes: When the wind turbine generator set is installed but commissioning has not yet begun, in response to receiving an anti-vortex command from the tower base control unit of the wind turbine generator set, the backup power source of the wind turbine generator set is activated, the yaw of the wind turbine generator set is controlled according to the wind mode indicated in the anti-vortex command, and the current pitch angle of each blade of the wind turbine generator set is determined according to the pitch mode indicated in the anti-vortex command, so as to control the pitch of each blade.

10. A wind turbine generator set, characterized in that, The wind turbine generator set includes: processor; Memory used to store processor-executable instructions. Wherein, when the processor executes the executable instructions, it causes the processor to perform the control method for the wind turbine generator set according to any one of claims 1 to 9.

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