Wake control method and related device for wind turbine generator set

Abstract

The present application discloses a method and related device for controlling the wake of a wind turbine generator set, wherein the method includes: when the power-limited wind turbine generator set is a downstream wind turbine generator set affected by the wake under the current wind conditions, obtaining the power limit of the power-limited wind turbine generator set and the unit power before and after executing the current wake control strategy under the current wind conditions; if the unit power exceeds the limit after executing the strategy but does not exceed the limit before executing the strategy, then when the unit power is adjusted to the power limit, and the unit power gain of the power-limited wind turbine generator set is greater than the unit power loss of the upstream wind turbine generator set, correcting the current wake control instruction corresponding to the upstream unit to reduce the unit power to less than or equal to the power limit. The present application solves the problem in the prior art that the setting of the wake control instruction under the restricted state affects the power generation effect of the wind farm.

Description

Technical Field

[0001] The present application belongs to the field of wind power generation technology, and in particular relates to a method, device, equipment, computer-readable storage medium, and computer program product for wake control of a wind turbine generator set. Background Art

[0002] A wind turbine converts wind energy from moving air into electricity. During operation, wind turbines can be affected by the wake turbulence of nearby turbines, resulting in power loss and increased fatigue loads. To mitigate the adverse effects of wake turbulence, existing technologies employ wind farm wake control strategies. However, in actual operation, wind farms are subject to grid scheduling and other factors, limiting active power output, potentially limiting wind turbines' output.

[0003] Currently, when wind turbines are in a restricted state, they usually cut out the wake control command. However, this method affects the wake control effect. Summary of the Invention

[0004] The embodiments of the present application provide a wake control method and related devices for a wind turbine generator set, which can solve the problem in the prior art that the setting of wake control instructions under a restricted state affects the power generation effect of the wind farm.

[0005] In one aspect, an embodiment of the present application provides a method for controlling a wake of a wind turbine generator set, the method comprising:

[0006] When the power-limited wind turbine generator set is a downstream wind turbine generator set affected by the wake under the current wind conditions, the power limit of the power-limited wind turbine generator set, the first unit power and the second unit power under the current wind conditions are obtained, where the first unit power is the unit power after the current wake control strategy is executed, and the second unit power is the unit power before the current wake control strategy is executed.

[0007] When the power of the first unit exceeds the power limit and the power of the second unit does not exceed the power limit, determine whether the unit power gain of the power-limited wind turbine generator set is greater than the unit power loss of the upstream wind turbine generator set when the power of the first unit is adjusted to the power limit under the current wind conditions. The upstream wind turbine generator set is a generator set located upstream of the power-limited wind turbine generator set.

[0008] If the unit power gain of the power-limited wind turbine generator set is less than or equal to the unit power loss of the upstream wind turbine generator set, the upstream wind turbine generator set is controlled to stop wake control.

[0009] If the unit power gain of the power-limited wind turbine generator set is greater than the unit power loss of the upstream wind turbine generator set, the first wake control instruction corresponding to the upstream wind turbine generator set is corrected to reduce the power of the first unit to less than or equal to the power limit, and the current wake control strategy includes the first wake control instruction.

[0010] Optionally, the method further comprises:

[0011] When the power-limited wind turbine generator set is not a downstream wind turbine generator set affected by the wake under the current wind conditions, and the power of the first unit exceeds the power limit, the second wake control instruction corresponding to the power-limited wind turbine generator set is corrected so that the power of the first unit is less than or equal to the power limit, and the current wake control strategy includes the second wake control instruction.

[0012] Optionally, correcting the second wake control instruction corresponding to the power-limited wind turbine generator set includes:

[0013] When the second wake control instruction is a variable speed wake control instruction or a variable pitch wake control instruction, the second wake control instruction is frozen.

[0014] The power of the first unit is reduced by other control methods except the second wake control instruction.

[0015] Optionally, the method further comprises:

[0016] When the power-limited wind turbine generator set is not a downstream wind turbine generator set affected by the wake under the current wind conditions and the power of the first unit does not exceed the power limit, each wind turbine generator set is controlled to perform wake control according to the current wake control strategy.

[0017] Optionally, after obtaining the power limit value of the power-limited wind turbine generator set, the power of the first unit and the power of the second unit under current wind conditions, the method further includes:

[0018] When the power of the first unit and the power of the second unit do not exceed the power limit, each wind turbine generator set is controlled to perform wake control according to the current wake control strategy.

[0019] When the power of the first unit and the power of the second unit both exceed the power limit, the upstream wind turbine generator set is controlled to stop wake control.

[0020] Optionally, when the power-limited wind turbine generator set is a downstream wind turbine generator set affected by a wake under current wind conditions, before obtaining the power limit value of the power-limited wind turbine generator set and the power of the first unit and the power of the second unit under current wind conditions, the method further includes:

[0021] Obtain the power generation change trend of the power-limited wind turbine generator set, where the power generation change trend is the trend when the current wake control strategy is executed under the current wind conditions.

[0022] When the power generation change trend is increasing, it is determined that the power-limited wind turbine generator set is a downstream wind turbine generator set affected by the wake under the current wind condition.

[0023] When the power generation change trend is decreasing or unchanged, it is determined that the power-limited wind turbine generator set is not a downstream wind turbine generator set affected by the wake under the current wind condition.

[0024] On the other hand, an embodiment of the present application provides a wake control device for a wind turbine generator set, the device comprising:

[0025] An acquisition module is used to obtain the power limit of the power-limited wind turbine generator set, the first unit power and the second unit power under the current wind conditions when the power-limited wind turbine generator set is a downstream wind turbine generator set affected by the wake under the current wind conditions. The first unit power is the unit power after the current wake control strategy is executed, and the second unit power is the unit power before the current wake control strategy is executed.

[0026] A judgment module is used to judge whether, when the power of the first unit exceeds the power limit and the power of the second unit does not exceed the power limit under the current wind conditions, the unit power gain of the power-limited wind turbine generator set is greater than the unit power loss of the upstream wind turbine generator set, where the upstream wind turbine generator set is a generator set located upstream of the power-limited wind turbine generator set.

[0027] a control module, configured to control the upstream wind turbine to stop wake control if the power gain of the power-limited wind turbine is less than or equal to the power loss of the upstream wind turbine;

[0028] a correction module configured to correct a first wake control instruction corresponding to the upstream wind turbine if the unit power gain of the power-limited wind turbine is greater than the unit power loss of the upstream wind turbine, so as to reduce the power of the first unit to less than or equal to the power limit, the current wake control strategy including the first wake control instruction.

[0029] In another aspect, an embodiment of the present application provides a wake control device for a wind turbine generator set, the device comprising:

[0030] a processor and a memory storing computer program instructions;

[0031] When the processor executes the computer program instructions, the wake control method of the wind turbine generator set according to the above aspects is implemented.

[0032] On the other hand, an embodiment of the present application provides a computer storage medium, on which computer program instructions are stored. When the computer program instructions are executed by a processor, the wake control method of the wind turbine generator set according to the above aspect is implemented.

[0033] On the other hand, an embodiment of the present application provides a computer program product having computer program instructions stored thereon, which implement the above-mentioned method for controlling the wake of a wind turbine generator set when the computer program instructions are executed by a processor.

[0034] The wake control method and related apparatus for a wind turbine generator set according to an embodiment of the present application can, when a power-limited wind turbine generator set is a downstream wind turbine generator set affected by wake under current wind conditions, obtain the unit power of the power-limited wind turbine generator set before and after executing a current wake control strategy under current wind conditions. Specifically, when the unit power exceeds the power limit after executing the current wake control strategy and does not exceed the power limit before executing the strategy, the method determines whether the unit power gain of the power-limited wind turbine generator set is greater than the unit power loss of the upstream wind turbine generator set when the unit power is adjusted to the power limit under the current wind conditions. The method then modifies the first wake control instruction corresponding to the upstream wind turbine generator set to reduce the first unit power to less than or equal to the power limit, or controls the upstream wind turbine generator set to stop wake control. Thus, determining whether to continue wake control based on the unit power improvement effect of the wake control strategy can maximize the wind farm's power generation efficiency under power-limited conditions, thereby resolving the problem in the prior art where the setting of wake control instructions under limited conditions affects the wind farm's power generation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0036] Figure 1 This is a flow chart of a method for controlling a wind turbine wake provided by an embodiment of the present application;

[0037] Figure 2 is a flow chart of a wake control method for a wind turbine generator set provided by another embodiment of the present application;

[0038] Figure 3 is a schematic structural diagram of a wake control device for a wind turbine generator set provided by another embodiment of the present application;

[0039] Figure 4 This is a structural diagram of a wake control device for a wind turbine generator set provided in another embodiment of the present application. DETAILED DESCRIPTION

[0040] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present application by illustrating the examples of the present application.

[0041] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0042] A wind turbine converts wind energy from moving air into electricity. Specifically, when a wind turbine absorbs some of the air's energy and creates disturbances, a wake region forms downstream of the wind turbine. Compared to the free stream, the air velocity in this wake region decreases and the turbulence increases. Therefore, if a wind turbine in a wind farm is affected by the wake of nearby turbines, it can result in power loss and increased fatigue loads, ultimately impacting the turbine's service life.

[0043] To mitigate the adverse effects of wake turbulence in wind farms, existing technologies employ wind farm optimization control methods to increase power generation and reduce turbine load. The core idea behind these wind farm optimization control methods is to deviate from the optimal operating state of some wind turbines, particularly upstream wind turbines, to reduce the impact of wake turbulence on downstream wind turbines.

[0044] Due to various factors, wind turbines within a wind farm may operate in a limited or restricted power mode during certain periods. Specifically, to ensure power system stability, wind farms must control active power output based on grid dispatch, ensuring that some or all wind turbines within the wind farm operate below the optimal power level for current wind conditions, thereby meeting grid requirements. Furthermore, the operating power of some wind turbines may be limited due to wind turbine operating characteristics and other control requirements.

[0045] In related technologies, when a wind turbine is detected to be operating at limited power, the wake control strategy is either directly disengaged or continued with the current wake control strategy. However, directly disengaging the wake control strategy in a limited state reduces the wake control's operating time, thereby affecting the wake control strategy's corresponding power generation increase. Furthermore, directly continuing with the current wake control strategy in a limited state can easily reduce the wind farm's power generation increase or even reduce power generation.

[0046] In summary, in the related art, the wake control strategy of the wind turbine in the restricted state has the problem of affecting the wake control effect, which may cause the wind farm power generation to decrease or even reduce the power generation.

[0047] To solve the problems of the prior art, the present invention provides a method, device, apparatus, computer storage medium, and computer program product for controlling the wake of a wind turbine. The following first introduces the method for controlling the wake of a wind turbine provided by the present invention.

[0048] Figure 1 FIG. 1 is a flow chart showing a method for controlling the wake of a wind turbine generator set according to an embodiment of the present application. Figure 1 As shown, the wake control method of a wind turbine generator set provided in an embodiment of the present application includes the following steps:

[0049] S101. When the power-limited wind turbine generator set is a downstream wind turbine generator set affected by a wake vortex under current wind conditions, obtain a power limit value of the power-limited wind turbine generator set, a first unit power, and a second unit power under current wind conditions, where the first unit power is the unit power after executing a current wake control strategy, and the second unit power is the unit power before executing the current wake control strategy.

[0050] S102. When the power of the first unit exceeds the power limit and the power of the second unit does not exceed the power limit, determine whether the unit power gain of the power-limited wind turbine generator set is greater than the unit power loss of the upstream wind turbine generator set when the power of the first unit is adjusted to the power limit under the current wind conditions, where the upstream wind turbine generator set is a generator set located upstream of the power-limited wind turbine generator set.

[0051] S103: If the unit power gain of the power-limited wind turbine generator set is less than or equal to the unit power loss of the upstream wind turbine generator set, control the upstream wind turbine generator set to stop wake control.

[0052] S104. If the unit power gain of the power-limited wind turbine generator set is greater than the unit power loss of the upstream wind turbine generator set, modify the first wake control instruction corresponding to the upstream wind turbine generator set to reduce the power of the first unit to less than or equal to the power limit, and the current wake control strategy includes the first wake control instruction.

[0053] In an embodiment of the present application, when a power-limited wind turbine is a downstream wind turbine affected by wake turbulence under current wind conditions, the power of the power-limited wind turbine before and after executing the current wake control strategy is obtained. Specifically, when the power of the power-limited wind turbine exceeds the power limit after executing the current wake control strategy and does not exceed the power limit before executing the strategy, the power-limited wind turbine determines whether the power gain of the power-limited wind turbine is greater than the power loss of the upstream wind turbine when the power of the power-limited wind turbine is adjusted to the power limit under the current wind conditions. The first wake control instruction corresponding to the upstream wind turbine is then modified accordingly to reduce the power of the first wind turbine to less than or equal to the power limit, or the upstream wind turbine is controlled to stop wake control. Whether to continue wake control is thus determined based on the power-enhancing effect of the wake control strategy, maximizing the wind farm's power generation efficiency under power-limited conditions. This solves the problem in the prior art where the setting of wake control instructions under limited conditions affects the wind farm's power generation efficiency.

[0054] In some embodiments, in S101, it is possible to continuously monitor whether all wind turbines in the entire wind farm are in a power-limited state. When all wind turbines are in normal operation (i.e., not in a power-limited state), wake control is continued to be performed according to the general wake control method under the current wind conditions.

[0055] It should be noted that the above-mentioned general wake control method refers to the wake control strategy in the relevant technology that controls some wind turbines to deviate from the optimal operating state to reduce the impact of the wind turbines on their downstream wind turbines, which can improve the power generation of the entire wind farm. It will not be described or distinguished in detail here.

[0056] When any wind turbine generator set (all or part of the wind turbine generator sets) is in a limited power operation state, the role of the limited power wind turbine generator set in the current wake control strategy can be further determined, that is, whether the limited power wind turbine generator set is a wind turbine generator set that is responsible for increasing the power generation in the current wake control strategy (also known as the downstream wind turbine generator set affected by the wake under the current wind conditions), or a wind turbine generator set that is responsible for reducing the power generation or playing no role in the current wake control strategy (also known as the downstream wind turbine generator set not affected by the wake under the current wind conditions).

[0057] In an optional example, the above method for determining the role played by the power-limited wind turbine generator set in the current wake control strategy may further include the following steps:

[0058] Obtain the power generation change trend of the power-limited wind turbine generator set, where the power generation change trend is the trend when the current wake control strategy is executed under the current wind conditions.

[0059] When the power generation change trend is increasing, it is determined that the power-limited wind turbine generator set is a downstream wind turbine generator set affected by the wake under the current wind condition.

[0060] When the power generation change trend is decreasing or unchanged, it is determined that the power-limited wind turbine generator set is not a downstream wind turbine generator set affected by the wake under the current wind condition.

[0061] The above-mentioned power generation change trend can be obtained by looking up a database based on the current wind conditions, the current wake control strategy and the operating data of the wind turbine generator set without power limitation.

[0062] It's understandable that the wake control strategy reduces the impact of the upstream wind turbine's wake on the downstream wind turbine by deviating from its optimal operating state, particularly the upstream wind turbine. This increases the power generation of the downstream wind turbine, ultimately boosting the entire wind farm's output. Therefore, when the wake control strategy is implemented under current wind conditions, the downstream wind turbines affected by the wake will experience an increase in power generation. Conversely, the wind turbines unaffected by the wake will experience a decrease in power generation.

[0063] It should also be noted that if the wind turbine generator set is not a downstream wind turbine generator set affected by the wake, it can be an upstream wind turbine generator set under the current wind conditions, or a wind turbine generator set that does not affect the power generation of other wind turbine generator sets (it can be an independent wind turbine generator set, or a wind turbine generator set in the midstream, etc.).

[0064] In the above scheme, by obtaining the power generation change trend when executing the wake control strategy under the current wind conditions, the role of the power-limited wind turbine can be understood, thereby facilitating targeted wake control.

[0065] The above-mentioned step of obtaining the power limit of the power-limited wind turbine generator set may also be performed before determining whether the power-limited wind turbine generator set is a downstream wind turbine generator set affected by the wake under the current wind conditions. That is, when it is determined that a wind turbine generator set in the wind farm is power-limited, the power limit value (maximum value) of the wind turbine generator set under power-limited conditions is obtained.

[0066] In some embodiments, in S102 , it may be determined whether the wake control strategy needs to be adjusted and whether there is room for adjustment by determining the power of the power-limited wind turbine generator set before and after executing the current wake control strategy under the current wind conditions.

[0067] Among them, when the unit power after executing the current control strategy under the current wind conditions (i.e., the first unit power) exceeds the power limit, and the unit power before executing the current control strategy under the current wind conditions (i.e., the second unit power) does not exceed the power limit, it indicates that the unit power of the wind turbine responsible for increasing the power generation power did not exceed the limit before the wake control strategy was executed. After reducing the influence of the wake on the wind turbine, the power generation power of the downstream wind turbine increased, and the unit power of the wind turbine increased and reached the limit. At this time, the wake control strategy has room for adjustment.

[0068] This can be done by judging whether the increase in unit power (unit power gain) is greater than the decrease in unit power (unit power loss) of the upstream wind turbine relative to the downstream wind turbine when the unit power is adjusted to the power limit after the current wake control strategy is executed under the current wind conditions.

[0069] If the unit power is adjusted to the maximum value under the power limit condition, the unit power gain is greater than the unit power loss. At this time, the use of the wake control strategy can still increase the power generation compared to when the wake control strategy is not used. Therefore, the wake control strategy needs to be adjusted. The current wake control strategy can be corrected to maximize the wind farm power generation efficiency while meeting the power limit requirements. This solves the problem of the existing technology that the setting of the wake control instruction under the restricted state affects the power generation effect of the wind farm.

[0070] However, when the power gain of the wind farm unit is less than or equal to the power loss of the unit, that is, the power generation using the wake control strategy may not increase, or may even decrease, then the use of the current wake control strategy will have the opposite effect. The wake control strategy of the wind turbine unit can be switched out, that is, the upstream wind turbine unit can be controlled to stop wake control to ensure the maximization of the wind farm power generation.

[0071] In some optional examples, the above-mentioned correction of the current wake control strategy can be achieved by increasing the unit power of the upstream unit relative to the power-limited generator unit, thereby indirectly reducing the unit power of the power-limited generator unit to meet the requirement of being below the power limit.

[0072] It should be noted that the factors that need to be considered when correcting the current wake control strategy include the operating status parameters of the wind turbine, the power reduction of the upstream wind turbine when the current wake control strategy is implemented, the power increase of the downstream wind turbine with limited power, and the power limit of the downstream wind turbine.

[0073] The above correction of the current wake control strategy mainly corrects the yaw, pitch and speed control instructions of the upstream wind turbine. The reference factor for correcting the first wake control instruction of the upstream wind turbine can be expressed by the following relationship (1).

[0074] Δκ=f(γ, θ, ω, ΔPup, ΔPdown, Plim) (1)

[0075] Among them, Δκ is the correction of the first wake control instruction including yaw, pitch change, and speed change, γ is the yaw state parameter, θ is the pitch angle, ω is the speed parameter, ΔPup is the power reduction of the upstream unit, ΔPdown is the power increase of the downstream unit, and Plim is the power limit of the power-limited downstream wind turbine generator set.

[0076] It should also be noted that since a wind farm is a complex network, the same wind turbine may be a downstream wind turbine relative to its upstream wind turbine, and may also have a wake impact on other wind turbines at the same time. Therefore, a comprehensive analysis of the unit power gain and unit power loss under multiple conditions can be conducted to obtain the final wake control adjustment strategy.

[0077] For comprehensive analysis of multiple scenarios, it is possible to consider grouping them. The following example illustrates the grouping of wind turbines.

[0078] In some embodiments, when monitoring wind turbines in a power-limited state in a wind farm, the group to which the power-limited wind turbines belong may be determined first, and then wake control is individually evaluated according to the group to which it belongs before comprehensive evaluation and control is performed.

[0079] The wind turbines in the wind farm can be grouped such that each group includes a downstream wind turbine affected by the wake and all wind turbines forming the wake area of ​​the downstream wind turbine. Alternatively, the group can be divided into a single upstream wind turbine and all downstream wind turbines affected by the upstream wind turbine's wake.

[0080] In other optional examples, the above groups can also be divided based on their own spatial position relationship and / or the relationship between the flow field and the wake influence. The grouping scheme can be fixed or dynamic based on different physical parameters. For example, different wind turbine generator groups can be dynamically divided based on different wind directions.

[0081] In some optional examples, the execution order of the wake control method for each group under the current wind conditions can also be set based on the divided groups. For example, when it is determined that there are power-limited wind turbines in multiple groups, the wake control scheme can be randomly executed for the power-limited wind turbines and their related wind turbines in each group based on the wake control strategy under the subsequent restricted state.

[0082] In some optional examples, the wake control strategies for the wind turbine generator sets in the group may be executed in sequence along the upwind direction and the downwind direction according to the current wind conditions.

[0083] In some optional examples, the operating data of the wind farm in the historical time period can be analyzed, or the spatial position and operating characteristics of each unit in the wind farm can be analyzed based on big data, statistics or machine learning methods to determine the sensitive units and stable units in the wind farm. Among them, the sensitive units are wind turbines with a higher probability of power limitation, and the stable units are wind turbines with a lower probability of power limitation. When sensitive units and stable units are set, if it is detected that there are wind turbines with power limitation in the wind farm, the wake control strategy under subsequent limited conditions will be executed on the sensitive units first.

[0084] The above technical solution determines the first control instruction of the wind turbine generator set relatively upstream based on the current wake control strategy, and determines the correction of the wake control instruction in combination with the power gain and loss in the power limited state. It can determine and control each wind turbine generator set in the wind farm to execute the final corrected wake control instruction, complete the wake control of the wind turbine generator set in the limited state, and maximize the power generation effect of the wind farm in the power limited state. Therefore, it solves the problem of the existing technology that the setting of the wake control instruction in the limited state affects the power generation effect of the wind farm.

[0085] Please see Figure 2 Based on the above embodiment, the wake control method of the wind turbine generator set may further include S205 and S206, and S205 and S206 may be executed after S101.

[0086] S205 , when the power of the first unit and the power of the second unit of the power-limited wind turbine generator set do not exceed the power limit, control each wind turbine generator set to perform wake control according to the current wake control strategy.

[0087] S206 , when the power of the first unit and the power of the second unit of the power-limited wind turbine generator set both exceed the power limit, controlling the upstream wind turbine generator set to stop wake control.

[0088] Among them, the power of the first unit and the power of the second unit do not exceed the power limit, indicating that under the current wind conditions, whether the current wake control strategy is implemented will not affect the limited power operation of the unit, and instructions can continue to be issued according to the current wake control strategy to control the operation of the limited power wind turbine generator set and its related units.

[0089] When the power of the first unit and the power of the second unit both exceed the power limit, it indicates that there is no room for adjusting the unit power under the power limit of the wind turbine generator set. The upstream wind turbine generator set needs to withdraw from wake control, and other adjustment strategies may even be needed to reduce the unit power of the power-limited wind turbine generator set to meet the power limit requirements.

[0090] In the above scheme, by setting the relationship between the power of the first unit and the power of the second unit and the power limit, flexible adjustment of the wake control strategy under different situations is achieved, which can maximize the power generation of the wind farm.

[0091] In some embodiments, when there is any wind turbine generator set in a limited power operation state, if it is determined that the limited power wind turbine generator set is not a downstream wind turbine generator set affected by the wake under the current wind conditions, for example, it can be an independent wind turbine generator set or an upstream wind turbine generator set, etc., the first unit power of the current limited wind turbine generator set after executing the current wake control strategy under the current wind conditions can be obtained, and then how the subsequent wake control strategy is executed can be determined.

[0092] It may be that when the power-limited wind turbine generator set is not the downstream wind turbine generator set affected by the wake under the current wind conditions, if the power of the first unit does not exceed the power limit, the wind turbine generator set is controlled to perform wake control according to the current wake control strategy.

[0093] When the power-limited wind turbine generator set is not a downstream wind turbine generator set affected by the wake under the current wind conditions, and the power of the first unit exceeds the power limit, the second wake control instruction corresponding to the power-limited wind turbine generator set is corrected so that the power of the first unit is less than or equal to the power limit, and the current wake control strategy includes the second wake control instruction.

[0094] Therefore, different wake controls are achieved based on the different roles played by the constrained wind turbines in the wake control strategy, thereby ensuring the maximum power generation under the constrained state, solving the problem in the existing technology that the setting of wake control instructions under the constrained state affects the power generation effect of the wind farm.

[0095] Specifically, the fact that the power of the first unit does not exceed the power limit indicates that the current limitation of the wind turbine generator set does not affect the execution of the current wake control strategy, and the current wake control strategy can continue to be executed.

[0096] The power of the first unit exceeds the power limit, which means that under the current wind conditions, after the wake control strategy is executed, the unit power of the restricted wind turbine generator set is reduced but still exceeds the power limit. The wake control instruction of the restricted wind turbine generator set can be corrected (i.e., the second wake control instruction) to reduce the unit power to a power limit less than or equal to the power limit.

[0097] The aforementioned modification process for the second wake control instruction can be determined based on the specific instruction type of the second wake control instruction. Specifically, when the second wake control instruction is a variable speed wake control instruction or a variable pitch wake control instruction, the second wake control instruction can be frozen, i.e., not executed, temporarily suspending wake control adjustments. Instead, power limiting can be achieved through other power limiting methods.

[0098] In some optional examples, when the second wake control instruction is a yaw control instruction, the wake control instruction may not be modified and the instruction may continue to be issued and executed according to the current wake control strategy. This is because after executing the second wake control instruction of the yaw control type, the wind turbine's unit power is still higher than the power limit. The wind turbine will then use its own control strategy to further reduce the wind turbine's unit power to below the power limit by changing other control strategies such as torque and speed.

[0099] The above scheme describes the execution process of each wake control strategy when the wind turbine with limited power is not a downstream unit affected by the wake. Furthermore, if the power of the first unit exceeds the power limit, a control method other than the current wake control strategy can be used to reduce power to achieve the power limit target. This can minimize the degree of change in the current wake strategy while achieving the power limit.

[0100] Figure 3 The following is a schematic diagram showing the structure of a wake control device for a wind turbine generator set provided in an embodiment of the present application. The device includes:

[0101] an acquisition module 310 for acquiring, when the power-limited wind turbine generator set is a downstream wind turbine generator set affected by a wake under current wind conditions, a power limit value of the power-limited wind turbine generator set, a first unit power, and a second unit power under current wind conditions, where the first unit power is the unit power after executing the current wake control strategy, and the second unit power is the unit power before executing the current wake control strategy;

[0102] a determination module 320 configured to, when the power of the first unit exceeds the power limit and the power of the second unit does not exceed the power limit, determine whether, under current wind conditions, the unit power gain of the power-limited wind turbine generator set is greater than the unit power loss of an upstream wind turbine generator set, where the upstream wind turbine generator set is a generator set located upstream of the power-limited wind turbine generator set;

[0103] The control module 330 is configured to control the upstream wind turbine to stop wake control if the power gain of the power-limited wind turbine is less than or equal to the power loss of the upstream wind turbine;

[0104] A correction module 340 is configured to correct a first wake control instruction corresponding to the upstream wind turbine if the unit power gain of the power-limited wind turbine is greater than the unit power loss of the upstream wind turbine, so as to reduce the power of the first unit to less than or equal to the power limit, wherein the current wake control strategy includes the first wake control instruction.

[0105] In an optional embodiment, the correction module can also be used to correct the second wake control instruction corresponding to the limited-power wind turbine generator set when the limited-power wind turbine generator set is not the downstream wind turbine generator set affected by the wake under the current wind conditions and the power of the first unit exceeds the power limit, so that the power of the first unit is less than or equal to the power limit, and the current wake control strategy includes the second wake control instruction.

[0106] In another optional embodiment, the correction module may include:

[0107] a freezing unit, configured to freeze the second wake control instruction when the second wake control instruction is a variable speed wake control instruction or a variable pitch wake control instruction;

[0108] The reduction unit is used to reduce the power of the first unit by other control methods except the second wake control instruction.

[0109] In another optional embodiment, the above-mentioned control module can also be used to control each wind turbine to perform wake control according to the current wake control strategy when the power-limited wind turbine is not the downstream wind turbine affected by the wake under the current wind conditions and the power of the first unit does not exceed the power limit.

[0110] In another optional embodiment, the above-mentioned control module can also be used to control each wind turbine to perform wake control according to the current wake control strategy when the power of the first unit and the power of the second unit do not exceed the power limit; when the power of the first unit and the power of the second unit both exceed the power limit, control the upstream wind turbine to stop wake control.

[0111] In yet another optional embodiment, the device may further include a determination module; wherein,

[0112] The acquisition module can also be used to obtain the power generation change trend of the power-limited wind turbine generator set, which is the trend when the current wake control strategy is executed under the current wind conditions;

[0113] The determination module is used to determine that the power-limited wind turbine generator set is a downstream wind turbine generator set affected by the wake under the current wind conditions when the power generation power change trend is increasing; and to determine that the power-limited wind turbine generator set is not a downstream wind turbine generator set affected by the wake under the current wind conditions when the power generation power change trend is decreasing or unchanged.

[0114] Figure 4 FIG4 is a schematic diagram showing the structure of a wake control device for a wind turbine generator set provided by an embodiment of the present application. The wake control device for a wind turbine generator set may include a processor 401 and a memory 402 storing computer program instructions.

[0115] Specifically, the processor 401 may include a central processing unit (CPU), or an application-specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0116] Memory 402 may include a large capacity memory for data or instructions. By way of example and not limitation, memory 402 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive, or a combination of two or more of these. Where appropriate, memory 402 may include removable or non-removable (or fixed) media. Where appropriate, memory 402 may be inside or outside the integrated gateway disaster recovery device. In a specific embodiment, memory 402 is a non-volatile solid-state memory.

[0117] In certain embodiments, the memory may include read-only memory (ROM), random access memory (RAM), magnetic disk storage media devices, optical storage media devices, flash memory devices, electrical, optical or other physical / tangible memory storage devices. Thus, generally, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the methods according to the aforementioned aspects of the present disclosure.

[0118] The processor 401 reads and executes computer program instructions stored in the memory 402 to implement any one of the wake control methods for a wind turbine generator set in the above embodiments.

[0119] In one example, the wake control device of the wind turbine generator set may further include a communication interface 403 and a bus 410. Figure 4 As shown, the processor 401 , the memory 402 , and the communication interface 403 are connected via a bus 410 and communicate with each other.

[0120] The communication interface 403 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiments of the present application.

[0121] Bus 410 comprises hardware, software or both, couples the parts of the wake control device of wind turbine generator set to each other.For example, and not limitation, bus can comprise accelerated graphics port (AGP) or other graphics bus, enhanced industry standard architecture (EISA) bus, front side bus (FSB), hypertransport (HT) interconnection, industry standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations.In suitable cases, bus 410 can comprise one or more buses.Although the present application embodiment describes and shows specific bus, the application considers any suitable bus or interconnection.

[0122] The wake control device of the wind turbine generator set can execute the wake control method of the wind turbine generator set in the embodiment of the present application, thereby realizing the combination of Figures 1 to 3 A method and device for controlling the wake of a wind turbine generator set are described.

[0123] In addition, in conjunction with the wake control method for a wind turbine generator set in the above-mentioned embodiments, embodiments of the present application may provide a computer storage medium for implementation. The computer storage medium stores computer program instructions; when the computer program instructions are executed by a processor, any of the wake control methods for a wind turbine generator set in the above-mentioned embodiments is implemented.

[0124] In addition, an embodiment of the present application further provides a computer program product, including a computer program, which can implement the steps and corresponding contents of the aforementioned method embodiment when executed by a processor.

[0125] It should be understood that the present application is not limited to the specific configurations and processes described above and illustrated in the figures. For the sake of brevity, a detailed description of known methods is omitted here. In the above embodiments, several specific steps are described and illustrated as examples. However, the method process of the present application is not limited to the specific steps described and illustrated. Those skilled in the art can make various changes, modifications, and additions, or change the order of the steps after understanding the spirit of the present application.

[0126] The functional blocks shown in the above block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. Programs or code segments can be stored in machine-readable media, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable media" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROMs, flash memories, erasable ROMs (EROMs), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segments can be downloaded via computer networks such as the Internet, intranets, etc.

[0127] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps. In other words, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0128] Aspects of the present disclosure have been described above with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present disclosure. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the function / action specified in one or more boxes of the flowchart and / or block diagram. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor or a field programmable logic circuit. It is also understood that each box in the block diagram and / or flowchart and the combination of the boxes in the block diagram and / or flowchart can also be implemented by dedicated hardware that performs the specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions.

[0129] The above is only a specific implementation method of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the scope of protection of the present application is not limited to this. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the scope of protection of the present application.

Claims

1. A method for controlling the wake of a wind turbine generator set, characterized in that: include: When the power-limited wind turbine generator set is a downstream wind turbine generator set affected by a wake under current wind conditions, obtaining a power limit value of the power-limited wind turbine generator set, a first unit power and a second unit power under current wind conditions, where the first unit power is the unit power after executing the current wake control strategy, and the second unit power is the unit power before executing the current wake control strategy; when the power of the first unit exceeds the power limit and the power of the second unit does not exceed the power limit, determining whether, when the power of the first unit is adjusted to the power limit under the current wind conditions, the unit power gain of the power-limited wind generator set is greater than the unit power loss of an upstream wind generator set, the upstream wind generator set being a generator set located upstream of the power-limited wind generator set; If the power gain of the power-limited wind turbine generator set is less than or equal to the power loss of the upstream wind turbine generator set, controlling the upstream wind turbine generator set to stop wake control; If the unit power gain of the power-limited wind turbine generator set is greater than the unit power loss of the upstream wind turbine generator set, the first wake control instruction corresponding to the upstream wind turbine generator set is corrected to reduce the power of the first unit to less than or equal to the power limit, and the current wake control strategy includes the first wake control instruction.

2. The method according to claim 1, characterized in that The method further comprises: When the power-limited wind turbine generator set is not a downstream wind turbine generator set affected by the wake under the current wind conditions, and the power of the first unit exceeds the power limit, the second wake control instruction corresponding to the power-limited wind turbine generator set is corrected so that the power of the first unit is less than or equal to the power limit, and the current wake control strategy includes the second wake control instruction.

3. The method according to claim 2, characterized in that The modifying the second wake control instruction corresponding to the power-limited wind turbine generator set includes: When the second wake control instruction is a variable speed wake control instruction or a variable pitch wake control instruction, freezing the second wake control instruction; The power of the first unit is reduced by other control methods except the second wake control instruction.

4. The method according to claim 1, wherein The method further comprises: When the power-limited wind turbine generator set is not a downstream wind turbine generator set affected by wake under current wind conditions, and the power of the first generator set does not exceed the power limit, each wind turbine generator set is controlled to perform wake control according to the current wake control strategy.

5. The method according to claim 1, wherein After obtaining the power limit of the power-limited wind turbine generator set, the power of the first unit and the power of the second unit under current wind conditions, the method further includes: When the power of the first unit and the power of the second unit do not exceed the power limit, controlling each wind turbine generator set to perform wake control according to the current wake control strategy; When both the power of the first generator set and the power of the second generator set exceed the power limit, the upstream wind turbine generator set is controlled to stop wake control.

6. The method according to any one of claims 1 to 5, characterized in that Before determining that the power-limited wind turbine generator set is a downstream wind turbine generator set affected by the wake under the current wind conditions, the method further includes: Obtaining a power generation change trend of the power-limited wind turbine generator set, where the power generation change trend is a trend when the current wake control strategy is executed under current wind conditions; When the power generation change trend is increasing, determining that the power-limited wind turbine generator set is a downstream wind turbine generator set affected by the wake under the current wind conditions; When the generation power variation trend is decreasing or unchanged, it is determined that the power-limited wind turbine generator set is not a downstream wind turbine generator set affected by the wake under the current wind condition.

7. A wake control device for a wind turbine generator set, characterized in that: The device comprises: an acquisition module, configured to, when the power-limited wind turbine generator set is a downstream wind turbine generator set affected by a wake under current wind conditions, acquire a power limit value of the power-limited wind turbine generator set, a first unit power, and a second unit power under current wind conditions, where the first unit power is the unit power after executing the current wake control strategy, and the second unit power is the unit power before executing the current wake control strategy; a judgment module, configured to, when the power of the first unit exceeds the power limit and the power of the second unit does not exceed the power limit, judge whether, under current wind conditions, a unit power gain of the power-limited wind generator set is greater than a unit power loss of an upstream wind generator set, the upstream wind generator set being a generator set located upstream of the power-limited wind generator set; a control module, configured to control the upstream wind turbine to stop wake control if the power gain of the power-limited wind turbine is less than or equal to the power loss of the upstream wind turbine; a correction module, configured to correct a first wake control instruction corresponding to the upstream wind turbine if the unit power gain of the power-limited wind turbine is greater than the unit power loss of the upstream wind turbine, so as to reduce the power of the first unit to be less than or equal to the power limit, the current wake control strategy including the first wake control instruction.

8. A wake control device for a wind turbine generator set, characterized in that: The device includes: a processor and a memory storing computer program instructions; When the processor executes the computer program instructions, the wake control method for a wind turbine generator set according to any one of claims 1 to 6 is implemented.

9. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer program instructions, and when the computer program instructions are executed by a processor, the wake control method for a wind turbine generator set according to any one of claims 1 to 6 is implemented.

10. A computer program product, characterized in that The computer program product stores computer program instructions, which, when executed by a processor, implement the wake control method for a wind turbine generator set according to any one of claims 1 to 6.

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