Control method of wind generating set and wind generating set

Abstract

The invention provides a control method of a wind generating set and the wind generating set. The control method comprises the steps that predicted wind speed data of the environment where the wind generating set is located in a preset period is obtained; matching the predicted wind speed data with a preset wind speed interval to determine a target wind speed interval where the predicted wind speed data is located; according to the target wind speed interval, a current variable pitch mode and a current wind facing mode corresponding to the target wind speed interval are determined; based on the variable pitch mode, determining the current pitch angle of each blade of the wind generating set so as to control each blade to be subjected to variable pitch to a pitch angle combination corresponding to the variable pitch mode; and based on the wind facing mode, the wind generating set is controlled to yaw to the position corresponding to the wind facing mode. The problem that the load reduction effect of the unit is poor is solved, different variable pitch and yaw control strategies can be executed according to the wind speed interval, it is ensured that the expected load reduction effect can be achieved under various wind speed conditions, and the safety and stability of the unit are improved.

Description

Technical Field

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

[0002] As the impeller diameter and overall capacity of wind turbines increase, the requirements for the reliability and safety of the units are becoming increasingly higher.

[0003] In order to ensure the safety of the unit, the load on the wind turbine can be reduced by controlling the blade pitch. In the relevant technology, the blade pitch is usually controlled based on the real-time wind speed to achieve the purpose of load reduction. However, due to different control algorithms, there may be differences in the control results of blade pitch, making it difficult to achieve the desired load reduction effect under some wind speed conditions. In addition, real-time control of pitch may have a certain lag, making it difficult to respond to changes in ambient wind speed in a timely manner. Summary of the invention

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

[0005] A first aspect of the present disclosure provides a control method for a wind turbine generator set, the control method comprising: acquiring predicted wind speed data for a predetermined period of an environment in which the wind turbine generator set is located; determining a target wind speed interval in which the predicted wind speed data is located by matching the predicted wind speed data with a preset wind speed interval, wherein the preset wind speed interval includes at least 4 wind speed intervals; according to the target wind speed interval, 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; based on the pitch mode, determining the current pitch angle of each blade of the wind turbine generator set to control the pitch of each blade to a pitch angle combination corresponding to the pitch mode; based on the wind facing mode, controlling the wind turbine generator set to yaw to a position corresponding to the wind facing mode.

[0006] Optionally, the preset wind speed interval includes a first wind speed interval, the pitch change mode includes a first pitch change mode corresponding to the first wind speed interval, and the wind facing mode includes a first wind facing mode corresponding to the first wind speed interval, wherein the first wind speed interval is 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, wherein 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 wind-facing position, and in the first variable pitch mode, the pitch angle of at least 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 the feathered position, wherein the first state refers to that the wind turbine is in the upwind wind-facing position and the pitch angle combination of each blade is a first combination, and the second state refers to that the wind turbine is in the upwind wind-facing position and the pitch angle combination of each blade is 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 the 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 the feathered position.

[0008] Optionally, the preset wind speed interval also includes a second wind speed interval, the pitch mode includes a second pitch mode corresponding to the second wind speed interval, and the first wind mode also corresponds to the second wind speed interval, wherein the second wind speed interval is an adjacent interval lower than the first wind speed interval, and 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 interval also includes a third wind speed interval, the first pitch mode also corresponds to the third wind speed interval, the facing wind mode includes a second facing wind mode corresponding to the third wind speed interval, in the second facing wind mode, the wind turbine is in a downwind facing wind position, the third wind speed interval is an adjacent interval higher than the first wind speed interval, the third wind speed interval is determined based on the maximum load that the wind turbine can bear in the third state, the third state means that the wind turbine is in a downwind facing wind position and the pitch angle combination of the blades is the 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 feathered position.

[0010] Optionally, the preset wind speed interval also includes a fourth wind speed interval, the pitch change mode includes a third pitch change mode corresponding to the fourth wind speed interval, and the second wind mode also corresponds to the fourth wind speed interval, wherein the fourth wind speed interval is an adjacent interval higher than the third wind speed interval, and in the third pitch change mode, each blade of the wind turbine generator set is in a feathered position.

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

[0012] Optionally, the control method is executed by the main control system of the wind turbine during the operation of the wind turbine, and the main control system is connected to the centralized control system of the wind farm where the wind turbine is located, wherein the control method further includes: when the wind turbine is connected to the power grid, in response to receiving an anti-vortex instruction from the centralized control system, based on the power supply of the power grid, executing the step of obtaining the predicted wind speed data for a predetermined period of the environment in which the wind turbine is located; when the wind turbine is disconnected from the power grid, in response to receiving the anti-vortex instruction via the satellite communication system, starting the backup energy of the wind turbine and executing the step of obtaining the predicted wind speed data for a predetermined period of the environment in which the wind turbine is located.

[0013] Optionally, the control method is executed by the main control system of the wind turbine when the wind turbine is debugged and not connected to the power grid, and the main control system is connected to the centralized control system of the wind farm where the wind turbine is located, wherein the control method further includes: when the wind turbine is debugged and the wind turbine communicates normally with the centralized control system, in response to receiving an anti-vortex instruction from the centralized control system, starting the backup energy of the wind turbine and executing the step of obtaining the predicted wind speed data for a predetermined period of the environment in which the wind turbine is located; when the wind turbine is debugged and the wind turbine communicates abnormally with the centralized control system, in response to receiving the anti-vortex instruction from the tower bottom control unit of the wind turbine, starting the backup energy of the wind turbine and executing the step of obtaining the predicted wind speed data for a predetermined period of the environment in which the wind turbine is located.

[0014] Optionally, the control method is executed by the main control system of the wind turbine when the wind turbine is hoisted and debugging has not started. The control method also includes: when the wind turbine is hoisted and debugging has not started, in response to receiving an anti-vortex instruction from the tower bottom control unit of the wind turbine, starting the backup energy of the wind turbine, controlling the yaw of the wind turbine according to the wind facing mode indicated in the anti-vortex instruction, and determining the current pitch angle of each blade of the wind turbine according to the pitch mode indicated in the anti-vortex instruction to control the pitch of each blade.

[0015] A second aspect of the present disclosure provides a 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, prompt the processor to execute the control method of the wind turbine generator set according to the present disclosure.

[0016] According to the control method of the wind turbine generator set and the wind turbine generator set disclosed in the present invention, the predicted wind speed data for a predetermined period can be obtained, and the current pitch mode and the current wind facing mode can be determined according to the wind speed range in which the predicted wind speed data is located, so as to control the yaw of the unit and control the pitch of each blade, wherein the wind facing mode represents the wind facing position of the unit and the wind facing position of each blade, different pitch modes correspond to different wind speed ranges, and different pitch angle combinations correspond to different pitch modes, which makes it possible to execute different pitch and yaw control strategies according to the wind speed range, ensuring that the expected load reduction effect can be achieved under various wind speed conditions, and can avoid the problem of control lag and inability to reduce load in time due to pitch changing according to real-time wind speed, thereby improving the safety and stability of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a flow chart showing a control method of a wind turbine generator system according to an exemplary embodiment of the present disclosure.

[0018] Figure 2 1 is a flow chart showing an example of a control strategy after the wind turbine generator set is powered on in a control method of the wind turbine generator set according to an exemplary embodiment of the present disclosure.

[0019] Figure 3 1 is a flow chart showing an example of a control strategy before the wind turbine generator set is powered on in a control method of the wind turbine generator set according to an exemplary embodiment of the present disclosure.

[0020] Figure 4 1 is a flow chart showing an example of a control strategy before the commissioning of a wind turbine generator set in a control method of the wind turbine generator set according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0021] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be clear. For example, the order of operations described herein is only an example and is not limited to those orders set forth herein, but can be changed as will be clear after understanding the disclosure of the present application, except for operations that must occur in a specific order. In addition, for greater clarity and simplicity, the description of features known in the art may be omitted.

[0022] The features described herein can be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided to illustrate only some of the many possible ways to implement the methods, devices, and / or systems described herein, which will be clear after understanding the disclosure of the present 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 members, components, regions, layers, or portions, these members, components, regions, layers, or portions should not be limited by these terms. Instead, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, first component, first region, first layer, or first portion referred to in the examples may also be referred to as the second member, second component, second region, second layer, or second portion.

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

[0026] The terms used herein are only used to describe various examples and are not intended to limit the disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "comprise", "include" and "have" indicate the presence of the described features, quantities, operations, components, elements and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements and / or combinations thereof.

[0027] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by a person of ordinary skill in the art to which the present disclosure belongs after understanding the present disclosure. Unless explicitly defined as such herein, terms (such as those defined in a general dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and the present disclosure, and should not be interpreted in an idealized or overly formal manner.

[0028] Furthermore, in the description of examples, when it is considered that a detailed description of a well-known related structure or function would cause vague interpretation of the present disclosure, such a detailed description will be omitted.

[0029] In view of the above-mentioned problems, the present disclosure provides a control method of 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-mentioned problems.

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

[0031] Here, the computer device can be set at a wind turbine or wind farm, for example, and can be communicatively connected to a measuring device or data center of the wind turbine or wind farm, so as to obtain the data required to execute the above method, such as measuring the pitch angle, predicting the wind speed, etc.

[0032] According to an embodiment of the present disclosure, the control method may include the following steps:

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

[0034] As an example, the predetermined period may be a predetermined time period in the future, such as the next 12 hours, and the predicted wind speed data may be, for example, meteorological warning wind speed data or data based on statistics of meteorological warning wind speed data.

[0035] The weather warning wind speed data may come from any weather forecast data source in the world, such as a regional weather bureau or a weather center.

[0036] As an example, the predicted wind speed data may be the maximum weather warning wind speed within a predetermined period, but is not limited thereto, and may be, for example, a statistical value of a maximum preset number of weather warning wind speed data within a predetermined period, such as an average value.

[0037] In step S120, the target wind speed interval in which the predicted wind speed data is located can be determined by matching the predicted wind speed data with a preset wind speed interval, wherein the preset wind speed interval can include at least 4 wind speed intervals.

[0038] As an example, the preset wind speed interval can be divided according to the state of the wind turbine generator set. Here, the state of the unit can include the windward position of the unit and the pitch angle combination of each blade. By considering the windward position of the unit and the pitch angle position of the blade at the same time, the load bearing capacity of the unit in the current state can be more comprehensively evaluated, thereby determining the wind speed that the unit can cope with in the current state. Here, the pitch angle can, for example, refer to the angle between the chord line of the airfoil at the top of the blade and the rotation plane.

[0039] In step S130, the current pitch mode and the current wind facing mode corresponding to the target wind speed interval may be determined according to the target wind speed interval, wherein the wind facing mode indicates the wind facing position of the wind turbine generator set.

[0040] As described above, multiple wind speed intervals may be preset, different pitch change modes may correspond to different wind speed intervals, one or more of the multiple wind speed intervals may correspond to a pitch change mode, and the pitch change mode may represent a pitch angle combination of each blade of the wind turbine generator set. In addition, at least two of the multiple wind speed intervals correspond to different wind facing modes.

[0041] Here, the wind speed intervals can be divided according to the load bearing capacity of the unit at different wind positions and different pitch angles. When the predicted wind speed data falls into the target wind speed interval in the preset wind speed interval, the pitch mode and wind facing mode corresponding to the target wind speed interval can be determined.

[0042] In an embodiment of the present disclosure, the wind turbine generator set can maintain the angle between the nose and the wind direction at a preset target angle in real time through a yaw action according to the real-time wind direction change, and the unit automatically performs the wind-facing action under the premise of a given preset wind-facing angle. The wind-facing position of the unit can include an upwind facing position and a downwind facing position, where the upwind facing position can be, for example, a 0° facing position of the nacelle, and the above-mentioned preset target angle is given as 0°; the downwind facing position can be, for example, a 180° facing position of the nacelle, and the above-mentioned preset target angle is given as 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 can correspond to different pitch angle combinations. The pitch angle combination refers to the combination of the pitch angles of the blades of the wind turbine. Taking a three-blade unit as an example, the pitch angle combination can be X1, X2 and X3, where X1, X2 and X3 represent the pitch angles of the three blades respectively. Here, each pitch angle combination does not distinguish the order between the blades.

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

[0045] Here, the first wind speed interval 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, wherein the pitch angle of at least one blade of the wind turbine in the first state can be smaller than the pitch angle of at least one blade of the wind turbine in the second state.

[0046] Since the load-bearing capacity of the unit is different at different blade pitch angles, the first wind speed interval can be divided by distinguishing the pitch angle of at least one blade. When the predicted wind speed data is in this interval, the load reduction effect of blade pitch change on the unit can be ensured by limiting the state of the unit between the first state and the second state, or limiting the pitch angle combination between the pitch angle combination of the first state and the pitch angle combination of the second state.

[0047] In an embodiment of the present disclosure, the maximum load that a wind turbine generator set can withstand can be determined based on the load level of the set itself and the load-bearing capacity of each mechanical component. For example, the load-bearing capacity of the set when the set is at various yaw positions and the blades are at various pitch angle positions can be determined through simulation based on the design parameters of the set.

[0048] As an example, in the first state and the second state, the windward positions of the unit and the blades may be the same, for example, the unit may be in an upwind windward position, while the pitch angle combinations are different. The first state may refer to the wind turbine being in an upwind windward position and the pitch angle combination of each blade is a first combination, and the second state may refer to the wind turbine being in an upwind windward position and the pitch angle combination of each blade is a second combination.

[0049] For example, the lower limit value of the first wind speed interval can be determined according to the maximum load that the unit can bear in the first state, and the upper limit value thereof can be determined according to 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 generator set can be in the range of approximately 0° to 40°, and the other blades of the wind turbine generator set can be in the feathered position; in the second combination, the pitch angle of one blade of the wind turbine generator set can be in the range of approximately 40° to 70°, and the other blades of the wind turbine generator set can be in the feathered position.

[0050] The pitch angle can be selected within the above range, so as to perform simulation according to the selected pitch angle to obtain the maximum load that the unit can withstand, for example, the maximum load that can be sustained 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 wind-facing mode, the wind turbine generator set is in an upwind wind-facing position. In the first pitch-changing mode, the pitch angle of at least one blade of the wind turbine generator set can be in the range of approximately 40° to 70°, and the other blades of the wind turbine generator set are in a feathering position. For example, taking three blades as an example, the pitch angle combination can be 90°, 90° and 70°. In this way, it can be ensured that in the first pitch-changing mode, the unit can cope with the load reduction requirements of any wind speed in the first wind speed range, ensuring the safety of the unit.

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

[0053] Here, the second wind speed interval may be an adjacent interval lower than the first wind speed interval, for example, the upper limit value of the second wind speed interval may be equal to the lower limit value of the first wind speed interval.

[0054] In the second pitch mode corresponding to the second wind speed interval, the pitch angle of at least one blade of the wind turbine generator set may be in the range of approximately 0° to 40°, and the other blades of the wind turbine generator set may be in the feathering position. For example, taking three blades as an example, the pitch angle combination may be 90°, 90° and 30°. Here, the maximum load that the unit can withstand in the second mode may be the maximum load that the unit can withstand in the first state.

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

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

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

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

[0059] When the predicted wind speed data is in this wind speed range, the first pitch control mode can also be used to control the pitch, but the windward position of the unit and the blades can be adjusted to resist the third wind speed range that is higher than the first wind speed range. Specifically, by yaw the unit to the downwind windward position, the load on the unit can be reduced without changing the pitch mode (such as the first pitch mode), so as to ensure the stability and safety of the unit as much as possible.

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

[0061] Here, the fourth wind speed interval is an adjacent interval higher than the third wind speed interval. For example, the lower limit value of the fourth wind speed interval may be the upper limit value of the third wind speed interval.

[0062] In the third pitch mode, all blades of the wind turbine can be in the feathered position. For example, taking three blades as an example, the pitch angle combinations can be 91°, 91° and 91°, and the wind-facing position of the unit and the blades can still be in the second wind-facing mode. In this way, while maintaining the downwind direction facing the wind, by adjusting the blade pitch, it is possible to further cope with higher wind speed ranges and reduce the load on the unit.

[0063] In addition, in this example, each blade can be controlled to be locked in response to the current pitch mode being the third pitch mode. Specifically, when the predicted wind speed data is in a relatively high wind speed range, in order to further ensure the safety of the unit, the blades can be pitched to the feathered position and each blade can be locked to prevent the blades from being out of the feathered position under the action of the wind when the wind speed is too high, thereby losing the load reduction effect. Here, the blade locking action can be related only to the pitch mode and has nothing to do with the wind facing mode, thereby further ensuring that the blades can remain in the feathered position in the third pitch mode.

[0064] In addition, when the wind speed is higher than the first wind speed interval, the unit can adopt the downwind facing wind mode to meet the component load requirements under ultra-high wind speed. In this state, if the third pitch mode is directly used for anti-vortex, the wind deviation of the unit needs to be kept within a relatively small range, the yaw system is required to be high and the yaw action is also more, which may affect the life of the yaw system. Recognizing this, in an embodiment of the present disclosure, the wind speed scene higher than the first wind speed interval is further divided into a third wind speed interval and a fourth wind speed interval. After selecting this strategy, when the wind speed is in the third wind speed interval, the unit can adopt the same pitch mode as the first wind speed interval (such as the first pitch mode) for anti-vortex. This attitude can adapt to a larger wind deviation, so the reliability requirements for the yaw system and the yaw system action frequency are lower, which can effectively improve the reliability of the unit in the downwind facing wind mode and improve the robustness of the unit's yaw system. By refining the wind speed interval with higher wind speeds, while ensuring the anti-vortex load reduction effect, the action of the unit when the wind speed changes can be minimized.

[0065] For example, the control method also includes: in response to the target wind speed interval in which the predicted wind speed data is located changing from a first wind speed interval to a second wind speed interval, while keeping the pitch mode unchanged (for example, the pitch angle of each blade remains unchanged), controlling the wind turbine generator set to switch its wind mode from the first wind mode to the second wind mode, for example, controlling the wind turbine generator set to yaw from an upwind wind position to a downwind wind position.

[0066] In step S140, the current pitch angle of each blade of the wind turbine generator set may be determined based on the current pitch change mode to control the pitch change of each blade and the pitch angle combination corresponding to the pitch change mode.

[0067] In step S150, based on the current wind facing mode, the wind turbine generator set may be controlled to yaw to a position corresponding to the wind facing mode.

[0068] When the wind facing mode and pitch changing mode corresponding to the current predicted wind speed data are determined, the yaw of the unit and the pitch changing of the blades can be controlled. Here, the yaw action can be achieved by the yaw system of the unit, and the pitch changing action can be achieved by the pitch changing system of the unit. In addition, control can refer to moving the unit or blades to the target position, or it can refer to keeping the unit or blades at the target position when they are already at the target position.

[0069] As an example, in the above step 130, in the process of determining the wind facing mode and the pitch changing mode according to the wind speed range, the wind facing mode and the pitch changing mode can be considered separately according to the wind speed range, and there is no coupling relationship between the wind facing mode and the pitch changing mode in the mode switching logic. However, according to the embodiment of the present disclosure, there may be a coupling relationship between the wind facing action and the pitch changing action in the order of action execution, and the pitch changing action can be completed first, and then the yaw action can be performed.

[0070] Specifically, the step of controlling the pitch of each blade to a pitch angle combination corresponding to the pitch mode may be performed first, and then the step of controlling the yaw of the wind turbine generator set to a position corresponding to the wind facing mode may be performed. For example, in response to the predicted wind speed data being in the third wind speed interval, the unit may switch to the second wind facing mode and the first pitch mode. At this time, the unit needs to switch the pitch mode first, and then switch to the second wind facing mode after completing the first pitch mode switch.

[0071] Such an action execution sequence is mainly based on the unit's anti-vortex and load reduction considerations to avoid the risk of vortex-induced vibration or load excess during the pitch mode switching process after the unit performs the yaw action to the specified wind angle position. For example, if the predicted wind speed data suddenly drops from the fourth wind speed interval to the first wind speed interval, the unit needs to switch from the combination of the second wind mode and the third pitch mode to the combination of the first wind mode and the first pitch mode. If the unit switches the wind mode first, the unit will have a combination of the first wind mode and the third pitch mode before the pitch mode is switched. Since the anti-vortex effect of the third pitch mode is worse, it will increase the risk of vortex-induced vibration of the unit in this state. Similarly, if the predicted wind speed suddenly increases from the first wind speed interval to the fourth wind speed interval, the unit needs to switch from the combination of the first wind mode and the first pitch mode to the combination of the second wind mode and the third pitch mode. If the unit switches the wind mode first, the unit will have a combination of the second wind mode and the first pitch mode before the pitch mode is switched. Since the load level of the first pitch mode is higher than the load level of the third pitch mode at the same wind speed, the risk of unit load exceeding in this state will increase.

[0072] Through the above method, different unit attitudes including wind facing mode and pitch changing mode can be selected based on different wind speed scenarios, so that the unit is in different load reduction states, thereby being able to cope with different degrees of wind loads, ensuring that the yaw and pitch changing control of the unit can be adaptively achieved when the wind speed changes, so as to reduce the risk of vortex-induced vibration of the whole unit and improve the reliability of the unit on the basis of ensuring the load-bearing requirements of the large components of the unit.

[0073] In addition, although the preset wind speed interval described above includes 4 wind speed intervals, the embodiments of the present disclosure are not limited to this. Any wind speed interval may be further subdivided, and the corresponding pitch mode may be further subdivided. For example, the range of the pitch angle may be further divided.

[0074] In addition to the above-mentioned adaptive unit attitude control method, in the embodiments of the present disclosure, it is also considered to start the above-mentioned control method in different ways 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, and the main control system of the wind turbine can be connected to the centralized control system (also referred to 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 generator set is connected to the power grid, in response to receiving an anti-vortex instruction from the centralized control system, based on the power supply of the power grid, executing the step of obtaining the predicted wind speed data for a predetermined period of the environment in which the wind turbine generator set is located, such as the above-mentioned step S110; when the wind turbine generator set is disconnected from the power grid, in response to receiving an anti-vortex instruction through the satellite communication system, starting the backup energy source of the wind turbine generator set, and executing the step of obtaining the predicted wind speed data for a predetermined period of the environment in which the wind turbine generator set is located, such as the above-mentioned step S110.

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

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

[0079] Here, the anti-vortex instruction may be an instruction for starting the above control method, which may be sent to the main control system of the unit via a satellite communication system in a manual or automatic manner. In addition, the backup energy source may be, for example, but not limited to, a diesel generator disposed at the bottom of the tower of the wind turbine generator set.

[0080] When the electrical connection is normal or the power grid is not powered off, in step S203, in response to receiving an anti-vortex instruction from the centralized control system, step S204 may be performed based on the power supply of the power grid. Here, the centralized control system may be, for example, a centralized control system for controlling multiple wind turbines in a wind farm, which may communicate with the main control system of each wind turbine to send a control instruction.

[0081] In response to receiving an anti-vortex instruction 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 in which the wind turbine generator set is located can be obtained, and it can be determined whether the predicted wind speed data is lower than the first wind speed interval, for example, whether the maximum predicted wind speed V is less than the first anti-vortex switching wind speed V1 (for example, the lower limit of the first wind speed interval). In response to V being less than V1, in step S205, the above-mentioned first wind mode and 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 in the first wind speed interval, for example, whether the maximum predicted wind speed V is less than the upwind resistant wind speed V0 (for example, the upper limit of the first wind speed interval).

[0082] In response to V being less than V0, in step S207, the above-mentioned first wind mode and first pitch mode can be automatically executed; 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 interval higher than the first wind speed interval, 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 value of the third wind speed interval).

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

[0084] Through the above method, during the operation of the unit, regardless of whether the power grid can provide power support, the adaptive unit attitude control method described above can be implemented, so that the unit can still perform load reduction actions according to wind speed changes when the power grid is out of power, thereby 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 when the wind turbine is debugged and not connected to the power grid. The control method can also include: when the wind turbine is debugged and the wind turbine communicates normally with the centralized control system, in response to receiving an anti-vortex instruction from the centralized control system, starting the backup energy of the wind turbine, and executing the step of obtaining the predicted wind speed data for a predetermined period of the environment in which the wind turbine is located, such as the above-mentioned step S110; when the wind turbine is debugged and the wind turbine communicates abnormally with the centralized control system, in response to receiving an anti-vortex instruction from the tower bottom control unit of the wind turbine, starting the backup energy of the wind turbine, and executing the step of obtaining the predicted wind speed data for a predetermined period of the environment in which the wind turbine is located, such as the above-mentioned step S110.

[0086] Figure 3 An example flow of a control strategy of a wind turbine generator set after commissioning is completed and before power is turned on in a control method of the wind turbine generator set according to an exemplary embodiment of the present disclosure is shown.

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

[0088] In the case of disconnection or abnormal communication with the centralized control system, in step S303, in response to receiving an anti-vortex instruction from the tower bottom control unit of the wind turbine generator set, the backup energy of the wind turbine generator set is started, and step S304 is executed. Here, the tower bottom control unit can be controlled, for example, manually or automatically, to send the anti-vortex instruction to the main control system.

[0089] In response to receiving an anti-vortex instruction from a satellite communication system or a tower bottom control unit, in step S304, the predicted wind speed data for a predetermined period of the environment in which the wind turbine generator set is located can be obtained, and it can be determined whether the predicted wind speed data is lower than the first wind speed interval, for example, whether the maximum predicted wind speed V is less than the first anti-vortex switching wind speed V1 (for example, the lower limit of the first wind speed interval). In response to V being less than V1, in step S305, the above-mentioned first wind mode and 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 in the first wind speed interval, for example, whether the maximum predicted wind speed V is less than the upwind resistant wind speed V0 (for example, the upper limit of the first wind speed interval).

[0090] In response to V being less than V0, in step S307, the above-mentioned first wind mode and first pitch mode can be automatically executed; 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 interval higher than the first wind speed interval, 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 value of the third wind speed interval).

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

[0092] Through the above method, when the unit is not powered on, the adaptive unit attitude control method can still be started through the centralized control system or the tower bottom control unit, so that the main control system of the unit performs load reduction according to the wind speed change to ensure 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 when the wind turbine is hoisted and debugging has not started. The control method can also include: when the wind turbine is hoisted and debugging has not started, in response to receiving an anti-vortex instruction from the tower bottom control unit of the wind turbine, starting the backup energy of the wind turbine, controlling the yaw of the wind turbine according to the wind facing mode indicated in the anti-vortex instruction, and determining the current pitch angle of each blade of the wind turbine according to the pitch mode indicated in the anti-vortex instruction to control the pitch of each blade.

[0094] Figure 4 An example flow of a control strategy in a control method for a wind turbine generator set according to an exemplary embodiment of the present disclosure is shown when the wind turbine generator set is hoisted and commissioning has not yet started.

[0095] like Figure 4 As shown, when the installation of the unit is completed but the commissioning has not started, the backup energy source of the wind turbine generator set can be started in response to receiving an anti-vortex instruction from the tower bottom control unit of the wind turbine generator set.

[0096] As an example, the anti-vortex instruction may include a first instruction, a second instruction, a third instruction and a fourth instruction, wherein the first instruction may correspond to a wind condition in which the current predicted wind speed data is in the second wind speed interval, the second instruction may correspond to a wind condition in which the current predicted wind speed data is in the first wind speed interval, the third instruction may correspond to a wind condition in which the current predicted wind speed data is in the third wind speed interval, and the fourth instruction may correspond to a wind condition in which the current predicted wind speed data is in the fourth wind speed interval.

[0097] In response to receiving a first instruction from the control unit at the bottom of the tower, in step S401, the first wind mode and the second pitch mode may be adopted; in response to receiving a second instruction from the control unit at the bottom of the tower, in step S402, the first wind mode and the first pitch mode may be adopted; in response to receiving a third instruction from the control unit at the bottom of the tower, in step S403, the second wind mode and the second pitch mode may be adopted; in response to receiving a fourth instruction from the control unit at the bottom of the tower, in step S404, the second wind mode and the third pitch mode may be adopted.

[0098] Through the above method, even if the unit has not entered the debugging stage, the adaptive unit attitude control method can be implemented through the tower bottom control unit, so that the safety of the unit can be ensured even if the unit has not entered the debugging stage.

[0099] According to the above-mentioned control method of the embodiment of the present disclosure, the risk of vortex-induced vibration of the whole machine can be reduced when the wind turbine is in different operating stages (such as lifting, operation and maintenance, and idling). By fine-tuning the wind speed scenes and executing different anti-vortex actions in a targeted manner, the purpose of reducing the risk of vortex-induced vibration of the whole machine can be achieved, thereby improving the safety and stability of the unit.

[0100] In addition, according to the above control method of the embodiment of the present disclosure, the constraints of the maximum wind speed in the 50-year return period (also called "V50 wind speed") and the typhoon wind speed on the design load and reliability of the whole machine can be reduced.

[0101] According to a second aspect of an embodiment 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, prompt the processor to execute the control method of the wind turbine generator set according to the embodiment of the present disclosure.

[0102] For example, the wind turbine generator set may include a main control system, and the main control system may include a computer device. Specifically, the control method of the wind turbine generator set may be executed by the computer device.

[0103] As an example, the computer device can be a PC, a tablet device, a personal digital assistant, a smart phone, or other device capable of executing the above-mentioned instruction set. Here, the computer device is not necessarily a single electronic device, but can also be any device or circuit that can execute the above-mentioned instructions (or instruction sets) individually or jointly. The computer device can also be part of an integrated control system or system manager, or can be configured as a portable electronic device that is interconnected with a local or remote (e.g., via wireless transmission) interface.

[0104] In a computer device, 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. As an 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 codes stored in the memory, wherein the memory can also store data. Instructions and data can also be sent and received through the network via the network interface device, wherein the network interface device can adopt any known transmission protocol.

[0106] The memory may be integrated with the processor, for example, RAM or flash memory is arranged within an integrated circuit microprocessor or the like. In addition, the memory may include a separate device, such as an external disk drive, a storage array, or any other storage device that can be used by a database system. The memory and the processor may be operatively coupled, or may communicate with each other, such as through an I / O port, a network connection, etc., so that the processor can read files stored in the memory.

[0107] In addition, the computer device may also include a video display (such as a liquid crystal display) and a user interaction interface (such as a keyboard, a mouse, a touch input device, etc.) All components of the computer device may be connected to each other via a bus and / or a network.

[0108] According to an embodiment of the present disclosure, a computer-readable storage medium may also be provided. When instructions in the computer-readable storage medium are executed by a processor of an electronic device, the electronic device can execute the control method of the wind turbine generator set according to the embodiment of the present disclosure.

[0109] Specifically, the control method of the wind turbine generator set according to the embodiment of the present disclosure can be written as 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 prompted to perform the control method of the wind turbine generator set according to the exemplary embodiment 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 disk storage, hard disk drive (HDD), solid state drive (SSD), card storage (such as, multimedia card, secure digital (SD) card or extreme digital (XD) card), magnetic tape, floppy disk, magneto-optical data storage device, optical data storage device, hard disk, solid state disk and any other device, any other device is configured to store computer program and any associated data, data files and data structures in a non-transitory manner and 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 on a networked computer system so that the computer program and any associated data, data files and data structures are stored, accessed and executed in a distributed manner by one or more processors or computers.

[0110] According to an embodiment of the present disclosure, a computer program product may also be provided, which includes computer executable instructions. When the computer executable instructions are executed by at least one processor, the control method of the wind turbine generator set according to the embodiment of the present disclosure is implemented.

[0111] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the claims.

[0112] In addition, it should be noted that although several examples of each step are described above with reference to specific drawings, it should be understood that the embodiments of the present disclosure are not limited to the combinations given in the examples, and the steps appearing in different drawings may be combined, and the order of execution of the steps may be changed, which is not exhaustive here.

[0113] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

[0114] The specific implementation methods of the present disclosure have been described in detail above. Although some embodiments have been shown and described, those skilled in the art should understand that these embodiments may be modified and varied without departing from the principles and spirit of the present disclosure, the scope of which is defined by the claims and their equivalents. These modifications and variations should also be within the scope of protection of the claims of the present disclosure.

Claims

1. A control method for a wind turbine generator set, characterized in that: The control method comprises: Obtaining predicted wind speed data for a predetermined period of time in an environment where the wind turbine generator set is located; By matching the predicted wind speed data with a preset wind speed interval, a target wind speed interval in which the predicted wind speed data is located is determined, wherein the preset wind speed interval includes at least 4 wind speed intervals; According to the target wind speed interval, determining a current pitch mode and a current wind facing mode corresponding to the target wind speed interval, wherein the wind facing mode represents a wind facing position of the wind turbine generator set; Based on the pitch change mode, determining the current pitch angle of each blade of the wind turbine generator set to control the pitch change of each blade to a pitch angle combination corresponding to the pitch change mode; Based on the wind-facing mode, the wind turbine generator set is controlled to yaw to a position corresponding to the wind-facing mode.

2. The control method according to claim 1, characterized in that: The preset wind speed interval includes a first wind speed interval, the pitch changing mode includes a first pitch changing mode corresponding to the first wind speed interval, and the facing wind mode includes a first facing wind mode corresponding to the first wind speed interval. The first wind speed interval is determined based on the maximum load that the wind turbine generator set can bear in the first state and the maximum load that the wind turbine generator set can bear in the second state. Wherein, in the first state, the pitch angle of at least one blade of the wind generator set is smaller than the pitch angle of at least one blade of the wind generator set in the second state.

3. The control method according to claim 2, characterized in that: In the first wind-facing mode, the wind turbine generator set is in an upwind wind-facing position. In the first pitch mode, the pitch angle of at least one blade of the wind turbine generator set is in the range of approximately 40° to 70°, and the other blades of the wind turbine generator set are in a feathered position. The first state refers to that the wind turbine generator set is in an upwind position facing the wind and the pitch angle combination of each blade is a first combination, and the second state refers to that the wind turbine generator set is in an upwind position facing the wind and the pitch angle combination of each blade is a second combination. In the first combination, the pitch angle of one blade of the wind turbine generator set is in the range of approximately 0° to 40°, and the other blades of the wind turbine generator set are in the feathered position; in the second combination, the pitch angle of one blade of the wind turbine generator set is in the range of approximately 40° to 70°, and the other blades of the wind turbine generator set are in the feathered position.

4. The control method according to claim 2, characterized in that: The preset wind speed interval also includes a second wind speed interval, the pitch changing mode includes a second pitch changing mode corresponding to the second wind speed interval, and the first wind speed mode also corresponds to the second wind speed interval. The second wind speed interval is an adjacent interval lower than the first wind speed interval. In the second pitch control mode, the pitch angle of at least one blade of the wind turbine generator set is in the range of approximately 0° to 40°, and the other blades of the wind turbine generator set are in a feathered position.

5. The control method according to claim 2, characterized in that: The preset wind speed interval also includes a third wind speed interval, the first pitch change mode also corresponds to the third wind speed interval, the facing wind mode includes a second facing wind mode corresponding to the third wind speed interval, in which the wind turbine generator set is in a downwind facing wind position, The third wind speed interval is an adjacent interval higher than the first wind speed interval, and the third wind speed interval is determined based on the maximum load that the wind turbine generator set can bear in a third state. The third state refers to that the wind turbine generator set is in a downwind wind position and the pitch angle combination of the blades is a second combination. In the second combination, the pitch angle of one blade of the wind turbine generator set is in the range of approximately 40° to 70°, and the other blades of the wind turbine generator set are in a feathered position.

6. The control method according to claim 5, characterized in that: The preset wind speed interval also includes a fourth wind speed interval, the pitch changing mode includes a third pitch changing mode corresponding to the fourth wind speed interval, and the second wind speed mode also corresponds to the fourth wind speed interval, The fourth wind speed interval is an adjacent interval higher than the third wind speed interval, and in the third pitch control mode, all blades of the wind turbine generator set are in a feathered position.

7. The control method according to claim 6, characterized in that: The control method further comprises: In response to the current pitch change mode being the third pitch change mode, each blade is controlled to be locked.

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 during the operation of the wind turbine generator set, and the main control system is connected to the centralized control system of the wind farm where the wind turbine generator set is located, wherein the control method further includes: In the case where the wind turbine generator set is connected to the power grid, in response to receiving an anti-vortex instruction from the centralized control system, based on the power supply of the power grid, the step of obtaining the predicted wind speed data of the environment in which the wind turbine generator set is located for a predetermined period is performed; When the wind turbine generator set is disconnected from the power grid, in response to receiving the anti-vortex instruction through the satellite communication system, the backup energy source of the wind turbine generator set is started, and the step of obtaining 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 is debugged and not connected to the power grid, and the main control system is connected to the centralized control system of the wind farm where the wind turbine generator set is located, wherein the control method further includes: When the commissioning of the wind turbine generator set is completed and the communication between the wind turbine generator set and the centralized control system is normal, in response to receiving an anti-vortex instruction from the centralized control system, starting the backup energy source of the wind turbine generator set and performing the step of obtaining the predicted wind speed data of the environment in which the wind turbine generator set is located for a predetermined period; When the commissioning of the wind turbine generator set is completed and there is an abnormality in the communication between the wind turbine generator set and the centralized control system, in response to receiving the anti-vortex instruction from the tower bottom control unit of the wind turbine generator set, the backup energy of the wind turbine generator set is started, and the step of obtaining the predicted wind speed data for a predetermined period of the environment in which the wind turbine generator set is located is executed.

10. 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 is hoisted and commissioning has not started. The control method further includes: When the wind turbine generator set has been hoisted and debugging has not started, in response to receiving an anti-vortex instruction from the tower bottom control unit of the wind turbine generator set, the backup energy of the wind turbine generator set is started, the yaw of the wind turbine generator set is controlled according to the wind-facing mode indicated in the anti-vortex instruction, 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 instruction to control the pitch of each blade.

11. A wind turbine generator set, characterized in that: The wind turbine generator set comprises: processor; a memory for storing processor executable instructions, Wherein, when the processor executable instructions are executed by the processor, the processor is prompted to execute the control method of the wind turbine generator set according to any one of claims 1 to 10.

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