Wind turbine generator grid-connected control method and related device

Abstract

The embodiment of the invention relates to the technical field of wind turbine generator equipment control, and provides a wind turbine generator grid-connected control method and a related device, and the method comprises the steps: obtaining the current operation state information and operation information of a wind turbine generator; determining target operation state information of the wind turbine generator at least according to the current operation state information and the operation information; according to the target operation state information, the wind turbine generator set is switched to the target operation state, the target operation information of the wind turbine generator set can be judged according to the current operation state information and the operation information, and the wind turbine generator set is switched to the target operation state immediately; therefore, electric quantity loss caused by the fact that the wind turbine generator set cannot be quickly connected to the grid for power generation after the wind turbine generator set meets the starting wind condition requirement in the grid connection waiting time is avoided, and the problems that an existing wind turbine generator set grid connection control method often depends on a single wind speed judgment condition, and power consumption is low are solved. And the electric energy generated by the wind turbine generator in the time of waiting for grid connection is wasted.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine equipment control, and in particular to a wind turbine grid-connected control method and related devices. Background Art

[0002] As the global demand for clean energy continues to grow, wind power generation, as an important part of renewable energy, has received increasing attention for its technological development and application. As the core equipment of a wind farm, the operating efficiency and stability of wind turbines directly affect the overall power generation capacity and economic benefits of the wind farm. In the actual operation of a wind farm, the grid-connected control strategy of wind turbines is of great significance for increasing power generation and optimizing power generation efficiency.

[0003] However, traditional wind turbine grid-connected control methods often rely on a single wind speed judgment condition. For example, when the wind speed continuously reaches or exceeds the set cut-in wind speed, the unit starts the grid-connected process. The grid-connected process takes a certain amount of time. During the time when the unit is waiting for grid connection, the wind turbine generates power loss during this period. Summary of the invention

[0004] The embodiment of the present application provides a wind turbine grid-connected control method and related devices to solve the technical problem that the existing wind turbine grid-connected control method often relies on a single wind speed judgment condition, resulting in waste of electric energy generated by the wind turbine while waiting for grid connection.

[0005] A first aspect of an embodiment of the present application provides a wind turbine grid-connected control method, the method comprising:

[0006] Obtain the current operating status information and operating information of the wind turbine;

[0007] Determining target operating state information of the wind turbine generator set at least according to the current operating state information and the operating information;

[0008] According to the target operating state information, the wind turbine set is switched to the target operating state.

[0009] Further, if the state indicated by the current operating state information is a shutdown state, determining the target operating state information of the wind turbine generator set at least according to the current operating state information and the operating information includes:

[0010] Get wind speed information;

[0011] Extracting the average wind speed value within a preset historical time from the wind speed information;

[0012] Extracting a first preset cut-in wind speed value from the operation information;

[0013] If the average wind speed value within the historical preset time is greater than the first preset cut-in wind speed value, it is determined that the target operation information of the wind turbine generator set is an anti-resonance operation state.

[0014] Furthermore, the first preset cut-in wind speed information is eighty percent of a set cut-in wind speed threshold.

[0015] Further, if the state indicated by the current operating state information is an anti-resonance state, determining the target operating state information of the wind turbine generator set at least according to the current operating state information and the operating information includes:

[0016] Extract the average pitch angle of three blades from the operation information;

[0017] If the average pitch angle of the three blades is greater than the set pitch angle and lasts for a preset time, it is determined that the target operating state information of the wind turbine generator set is the waiting grid-connected operating state.

[0018] Further, if the state indicated by the current operation state information is a waiting grid-connected operation state, determining the target operation state information of the wind turbine generator set at least according to the current operation state information and the operation information includes:

[0019] Extracting the generator speed value from the operation information;

[0020] If the generator speed value is greater than the grid-connected speed value, it is determined that the target operating state of the wind turbine generator set is a grid-connected operating state.

[0021] Further, if the state indicated by the current operating state information is a grid-connected operating state, determining the target operating state information of the wind turbine generator set at least based on the current operating state information and the operating information includes:

[0022] Extracting the generator speed value from the operation information;

[0023] If the generator speed value is less than the grid-connected speed value, the target operating state of the wind turbine generator set is determined to be a waiting operating state.

[0024] Further, if the state indicated by the current operation state information is a waiting operation state, determining the target operation state information of the wind turbine generator set at least according to the current operation state information and the operation information includes:

[0025] Extract the effective value of unit vibration, unit speed, significant characteristic frequency and blade angle from the operating information;

[0026] If the effective value of the unit vibration is greater than the set unit vibration value, the unit speed is in the resonant speed area, the significant characteristic frequency is confirmed as the tower frequency and the blade angle is at the minimum limit angle, and it lasts for 1 minute, then the target operating state of the wind turbine is determined to be the anti-resonance operating state.

[0027] Further, if the state indicated by the current operating state information is an anti-resonance operating state, determining the target operating state information of the wind turbine generator set at least according to the current operating state information and the operating information includes:

[0028] Get wind speed information;

[0029] Extracting the average wind speed value within a preset historical time from the wind speed information;

[0030] Extract the average wind speed value within the historical preset time;

[0031] Extracting a second preset cut-in wind speed value from the operation information;

[0032] If the average wind speed value within the historical preset time is less than the second preset cut-in wind speed value, it is determined that the target operation information of the wind turbine generator set is a shutdown state.

[0033] A second aspect of an embodiment of the present application provides a wind turbine grid-connected control device, the device comprising:

[0034] A first acquisition unit, used to acquire current operating status information and wind speed information of the wind turbine generator set;

[0035] A second acquisition unit, used to acquire wind speed information;

[0036] A first processing unit, configured to determine target operating state information of the wind turbine generator set using the current operating state information and the wind speed information;

[0037] The second processing unit is used to switch the wind turbine set to a target operating state according to the target operating state information.

[0038] A third aspect of an embodiment of the present application provides an electronic device, comprising a processor, an input device, an output device and a memory, wherein the processor, the input device, the output device and the memory are interconnected, wherein the memory is used to store a machine program, the machine program includes program instructions, and the processor is configured to call the program instructions to execute the wind turbine grid-connected control method as described in any one of the first aspects.

[0039] Beneficial effects:

[0040] The present invention provides a wind turbine grid-connected control method, which obtains real-time current operating status information and operating information of the wind turbine, and determines the target operating information of the wind turbine according to the current operating status information and operating information. Once the target operating information is confirmed, the wind turbine is immediately switched to the target operating state, thereby avoiding the situation where the electric energy generated in the wind turbine is wasted during the waiting time for grid connection, and solves the technical problem that the existing wind turbine grid-connected control method often relies on a single wind speed judgment condition, resulting in the electric energy generated by the wind turbine being wasted during the waiting time for grid connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 A schematic flow chart of mutual conversion between operating states of a wind turbine grid-connected control method is provided for an embodiment of the present application;

[0043] Figure 2 A schematic diagram of the overall control flow of a wind turbine grid-connected control method is provided for an embodiment of the present application;

[0044] Figure 3 A schematic flow chart of a wind turbine generator set confirming that a target operating state is an anti-resonance state in a shutdown state in a wind turbine generator set grid-connected control method provided in an embodiment of the present application;

[0045] Figure 4 A schematic flow chart of a wind turbine generator set confirming that a target operating state is a waiting grid-connected operating state in an anti-resonance state in a wind turbine generator set grid-connected control method according to an embodiment of the present application;

[0046] Figure 5 A schematic flow chart of a wind turbine generator set in a method for controlling a wind turbine generator set to be connected to the grid is provided in an embodiment of the present application, wherein the wind turbine generator set is waiting for a grid-connected operation state and confirms that the target operation state is a grid-connected operation state;

[0047] Figure 6 A schematic flow chart of a wind turbine generator set in a method for controlling a wind turbine generator set to be connected to the grid in a grid-connected operation state confirming that the target operation state is a waiting state for connecting to the grid in an embodiment of the present application is provided;

[0048] Figure 7 A schematic flow chart of a wind turbine generator set in a method for controlling a wind turbine generator set to be connected to the grid in an embodiment of the present application, in which a wind turbine generator set confirms that a target operating state is an anti-resonance state in a waiting state for a grid-connected operation;

[0049] Figure 8 A schematic flow chart of a wind turbine generator set confirming that a target operating state is a shutdown state in an anti-resonance state in a wind turbine generator set grid-connected control method according to an embodiment of the present application;

[0050] Fig. 9 A structural schematic diagram of a wind turbine grid-connected control device is provided for the embodiment of the present application;

[0051] Fig.10 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0052] Reference numerals:

[0053] First acquisition unit-001, second acquisition unit-002, first processing unit-003, second processing unit-004. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0055] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0056] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0057] In order to better understand the wind turbine grid-connected control method provided by the embodiment of the present application, the following is a brief introduction to the scenario of the wind turbine grid-connected control method. In the process of traditional wind turbines entering the grid, the following actions will be performed: first, the wind turbine is in a shutdown state, and waits until the wind speed condition reaches the preset cut-in wind speed, then the wind turbine is started, that is, the timing of the unit starting and connecting to the grid is judged by a single condition. Due to the environment in which the wind turbine is located, it is often located in the coastal area or at the border of my country, and the temperature is relatively low. Therefore, if the unit needs a long time to be connected to the grid due to low temperature and other conditions, at this time, while waiting for the unit's own conditions to meet the grid-connected conditions, these electric powers cannot be connected to the grid, and the generated electric power will be wasted.

[0058] In summary, in order to solve the technical problem that the existing wind turbine grid-connected control method often relies on a single wind speed judgment condition, resulting in the waste of electric energy generated by the wind turbine during the time of waiting for grid connection, this embodiment provides a wind turbine grid-connected control method, such as Figure 1 to Figure 2 ,include:

[0059] S1. Acquire the current operating status information and operating information of the wind turbine set, wherein the unit status indicated by the operating status information includes shutdown status, anti-resonance status, grid-connected waiting status and grid-connected operating status, and the operating information includes preset parameter information of the wind turbine set and real-time operating parameters of the wind turbine set.

[0060] S2, determining the target operating state information of the wind turbine generator set at least according to the current operating state information and the operating information, and this embodiment is preferred, such as Figure 1 As shown, according to the difference between the running state information and the running information, in this embodiment, there are 6 switching control modes between different running states, which are introduced in this embodiment in sequence:

[0061] As a preferred solution of this embodiment, Figure 3 As shown, the specific steps of the first switching mode condition 1 are as follows:

[0062] If the state indicated by the current operating state information is a shutdown state, determining the target operating state information of the wind turbine generator set at least according to the current operating state information and the operating information includes:

[0063] S2-1, obtaining wind speed information to determine whether the wind turbine has the operating conditions to start;

[0064] S2-2, extracting the average wind speed value within a historical preset time from the wind speed information. In this embodiment, the preset time is preferably 10 minutes, and the average wind speed value within the historical 10 minutes is extracted;

[0065] S2-3, extracting a first preset cut-in wind speed value from the operation information. In this embodiment, preferably, the first preset cut-in wind speed value is eighty percent of a set cut-in wind speed threshold. It should be noted that the set cut-in wind speed threshold is a cut-in wind speed value preset by the original wind turbine manufacturer;

[0066] S2-4. If the average wind speed value within the historical preset time is greater than the first preset cut-in wind speed value, the target operation information of the wind turbine set is determined to be the anti-resonance operation state. Specifically, when the average wind speed value within 10 minutes is greater than eighty percent of the set cut-in wind speed threshold, the wind power equipment is self-checked to meet the startup requirements, and then the wind turbine set is controlled to enter the anti-resonance operation state.

[0067] S3. According to the target operating state information, the wind turbine generator set is switched to the target operating state, that is, the wind turbine generator set is controlled to enter the anti-resonance operating state.

[0068] In this embodiment, the generator set is preferably set to prevent the small wind resonance speed as the target, and the speed is closed-loop controlled by changing the pitch. The target speed corresponds to the blade passing frequency set at 70% of the tower frequency, so as to avoid the wind turbine blade passing frequency being consistent with the tower frequency, causing tower resonance and damage to the wind turbine. In this process, the wind turbine blades run from 89 degrees to 0 degrees (it should be noted that the shutdown position of some models is 90 degrees or even 93 degrees, and 89 degrees is only used as an example here), until the generator set speed runs at 530rpm, at which time the blade passing frequency is about 0.14Hz, the tower frequency is 0.2Hz, and the wind turbine blade angle begins to be dynamically adjusted to keep the speed value at 530rpm, and the wind turbine runs in the anti-resonance operation state.

[0069] As a preferred solution of this embodiment, Figure 4 As shown, the specific steps of the second switching mode condition 2 are as follows:

[0070] If the state indicated by the current operating state information is an anti-resonance state, determining the target operating state information of the wind turbine generator set at least according to the current operating state information and the operating information includes:

[0071] S2-5 extracts the average pitch angle of three blades from the operation information;

[0072] S2-6. If the average pitch angle of the three blades is greater than the set pitch angle and lasts for a preset time, which is 1 minute in this embodiment, the target operating state information of the wind turbine is determined to be the waiting grid-connected operating state. This embodiment is preferred. At this time, the average pitch angle of the wind turbine is greater than 12 degrees, and it is considered that the current wind speed has met the startup requirements. The wind turbine is controlled to enter the waiting grid-connected operating state, that is, the wind speed is large enough.

[0073] S3. According to the target operating state information, the wind turbine generator set is switched to the target operating state, that is, the wind turbine generator set is controlled to switch to the grid-connection waiting operating state.

[0074] It should be noted that steps S2-1 to S2-4 are one of the steps of the grid-connected control method for the wind turbine set of this embodiment, namely condition 1, and steps S2-5 to S2-6 are one of the steps of the grid-connected control method for the wind turbine set of this embodiment, namely condition 2. Using this embodiment, the unit can be converted from the shutdown state to the anti-resonance state through condition 1, and then converted to the waiting grid-connected operation state through condition 2. In addition, the wind turbine set can also be directly controlled to convert from the anti-resonance state to the waiting grid-connected operation state through condition 2. That is, the specific wind turbine state conversion steps provided by the method provided by this embodiment only depend on the current operating status information and operating information of the wind turbine set. It is not necessary to start control from the shutdown state to use this embodiment, and this embodiment is not limited.

[0075] As a preferred solution of this embodiment, Figure 1 and Figure 5 As shown, the specific steps of the third switching mode condition 3 are as follows:

[0076] If the state indicated by the current operation state information is a waiting grid-connected operation state, determining the target operation state information of the wind turbine generator set at least according to the current operation state information and the operation information includes:

[0077] S2-7, extracting the generator speed value from the operation information. At this time, the wind turbine blades are opened and quickly spread from 12° to 0°, and the generator speed value rises rapidly.

[0078] S2-8. If the generator speed value is greater than the grid-connected speed value, the target operating state of the wind turbine set is determined to be the grid-connected operating state. When it is detected that the generator speed value rises to be greater than the grid-connected speed value, it is considered that the current generator set state is suitable for grid connection, and the target operating state is confirmed to be the grid-connected operating state. After the confirmation action occurs, the wind turbine set is immediately controlled to enter the grid-connected operating state, and the wind turbine set is connected to the grid.

[0079] S3. According to the target operating state information, the wind turbine generator set is switched to the target operating state, that is, the wind turbine generator set is controlled to switch to the grid-connected operating state.

[0080] As a preferred solution of this embodiment, Figure 1 and Figure 6 As shown, the specific steps of the fourth switching mode condition 4 are as follows:

[0081] If the state indicated by the current operation state information is a grid-connected operation state, determining the target operation state information of the wind turbine generator set at least according to the current operation state information and the operation information includes:

[0082] S2-9, extracting the generator speed value from the operation information;

[0083] S2-10. If the generator speed value is less than the grid-connected speed value, the target operating state of the wind turbine set is determined to be the waiting operating state. At this time, it is considered that the power generated by the generator set does not meet the grid-connected conditions, and the target operating state is confirmed to be the waiting grid-connected operating state. After the confirmation action occurs, the wind turbine set is immediately controlled to enter the waiting grid-connected operating state, and the wind turbine set is disconnected from the grid.

[0084] S3. According to the target operating state information, the wind turbine generator set is switched to the target operating state, that is, the wind turbine generator set is controlled to switch to the grid-connection waiting operating state.

[0085] As a preferred solution of this embodiment, Figure 1 and Figure 7 As shown, the specific steps of the fifth switching mode condition 5 are as follows:

[0086] S2-11. Extract the effective value of unit vibration, unit speed, significant characteristic frequency and blade angle from the operation information;

[0087] S2-12. If the effective value of the unit vibration is greater than the set unit vibration value, the unit speed is in the resonant speed area, the significant characteristic frequency is confirmed as the tower frequency and the blade angle is at the minimum limit angle, and it lasts for 1 minute, then the target operating state of the wind turbine is determined to be the anti-resonance operating state. If the above four conditions are met, it is considered that the operating state of the wind turbine has entered the waiting state for grid connection, that is, the wind turbine is converted to the anti-resonance state.

[0088] S3. According to the target operating state information, the wind turbine generator set is switched to the target operating state, that is, the wind turbine generator set is controlled to switch to the anti-resonance operating state.

[0089] As a preferred solution of this embodiment, Figure 1 and Figure 8 As shown, the specific steps of the sixth switching mode condition 6 are as follows:

[0090] S2-13, obtain wind speed information;

[0091] S2-14, extracting the average wind speed value within a historical preset time from the wind speed information. In this embodiment, the preset time is preferably 10 minutes, and the average wind speed value within the historical 10 minutes is extracted;

[0092] S2-15, extracting a second preset cut-in wind speed value from the operation information. In this embodiment, preferably, the second preset cut-in wind speed value is 70% of the set cut-in wind speed threshold;

[0093] S2-16. If the average wind speed value within the historical preset time is less than the second preset cut-in wind speed value, the target operation information of the wind turbine set is determined to be a shutdown state, and it is considered that the wind conditions in the future are not sufficient to start the wind turbine set. Therefore, the target operation state is confirmed to be a shutdown state. After the confirmation action occurs, the wind turbine set is immediately controlled to enter a shutdown state and wait for the next control instruction.

[0094] S3. According to the target operating state information, the wind turbine generator set is switched to the target operating state, that is, the wind turbine generator set is controlled to switch to the shutdown state.

[0095] That is, this embodiment provides a wind turbine grid-connected control method, which obtains real-time current operating status information and operating information of the wind turbine, and determines the target operating information of the wind turbine according to the current operating status information and operating information. Once the target operating information is confirmed, the wind turbine is immediately switched to the target operating state. Specifically, in this embodiment, the wind turbine is started when the wind force reaches 80% of the cut-in wind speed threshold, and the wind turbine is put into operation in advance. When the wind speed condition is met, it is immediately connected to the grid, thereby avoiding the situation where the electric energy generated in the wind turbine is wasted while waiting for the grid connection, and solving the technical problem that the existing wind turbine grid-connected control method often relies on a single wind speed judgment condition, resulting in the waste of electric energy generated by the wind turbine while waiting for the grid connection.

[0096] In addition, in the wind power industry, the tower frequency is usually designed to be lower than 90% of the blade passing frequency corresponding to the grid-connected speed. Otherwise, there is a risk of resonance in the operating area, and special control strategies need to be added in the operating control area, such as increasing the grid-connected speed, fast passing and other strategies to reduce risks and generate power generation losses.

[0097] If the tower frequency is lower than 90% of the blade passing frequency corresponding to the grid-connected speed, there is a risk of resonance before grid connection. When the wind speed is low, the risk is greater because the wind speed is not enough to support running at a higher speed. The anti-resonance operation state of this embodiment is mainly considered for this situation.

[0098] This embodiment sets an anti-resonance operation state, so that before the wind turbine is connected to the grid, in a low wind speed state, the blade passing frequency is prevented from being consistent with the tower frequency, causing the wind turbine to resonate and be damaged. It is highly practical and safe, and the life of the wind turbine is extended. If the operation resonance problem is not considered when the wind turbine tower is designed, the tower frequency is high, and the resonance frequency is in the operation area, the low wind operation speed can be set to the grid connection speed.

[0099] For the above embodiments, please refer to Fig.10 , Fig.10A structural schematic diagram of an electronic device provided in an embodiment of the present application, as shown in the figure, includes a processor, an input device, an output device and a memory, the processor, the input device, the output device and the memory are interconnected, wherein the memory is used to store a computer program, the computer program includes program instructions, the processor is configured to call the program instructions, and the program includes instructions for executing the following steps;

[0100] Obtain the current operating status information and operating information of the wind turbine;

[0101] Determining target operating state information of the wind turbine generator set at least according to the current operating state information and the operating information;

[0102] According to the target operating state information, the wind turbine generator set is switched to the target operating state.

[0103] In this example, by acquiring the current operating status information and operating information of the wind turbine in real time, and judging the target operating information of the wind turbine according to the current operating status information and operating information, once the target operating information is confirmed, the wind turbine is immediately switched to the target operating state, thereby avoiding the waste of electric energy generated by the wind turbine while waiting for grid connection, and solving the technical problem that the existing wind turbine grid-connected control method often relies on a single wind speed judgment condition, resulting in the waste of electric energy generated by the wind turbine while waiting for grid connection.

[0104] The above mainly introduces the scheme of the embodiment of the present application from the perspective of the execution process on the method side. It is understandable that in order to realize the above functions, the terminal includes a hardware structure and / or software module corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments provided herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0105] The embodiment of the present application can divide the terminal into functional units according to the above method example. For example, each functional unit can be divided according to each function, or two or more functions can be integrated into one processing unit. The above integrated unit can be implemented in the form of hardware or in the form of software functional units. It should be noted that the division of units in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation.

[0106] In line with the above, see Fig. 9 , Fig. 9 The present invention provides a schematic diagram of a wind turbine grid-connected control device. Figure 5 As shown, the device comprises:

[0107] The first acquisition unit-001 is used to acquire the current operating status information and operating information of the wind turbine;

[0108] The second acquisition unit-002 is used to acquire wind speed information;

[0109] A first processing unit-003, configured to determine target operating state information of the wind turbine generator set at least according to the current operating state information and the operating information;

[0110] The second processing unit-004 is used to switch the wind turbine set to a target operating state according to the target operating state information.

[0111] An embodiment of the present application also provides a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, and the computer program enables a computer to execute part or all of the steps of any wind turbine grid-connected control method recorded in the above method embodiments.

[0112] An embodiment of the present application also provides a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program enables a computer to execute part or all of the steps of any wind turbine grid-connected control method recorded in the above method embodiments.

[0113] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0114] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0115] In the several embodiments provided in the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of the units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the device or unit can be electrical or other forms.

[0116] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0117] In addition, the functional units in the various embodiments of the application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware or in the form of software program modules.

[0118] If the integrated unit is implemented in the form of a software program module and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a memory, including a number of instructions to enable a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned memory includes: U disk, read-only memory (ROM), random access memory (RAM), mobile hard disk, disk or optical disk and other media that can store program codes.

[0119] A person of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable memory, which can include: a flash drive, a read-only memory, a random access memory, a magnetic disk or an optical disk, etc.

[0120] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A wind turbine grid-connected control method, applied to a wind turbine grid-connected control device, characterized in that: include: Obtain the current operating status information and operating information of the wind turbine; Determining target operating state information of the wind turbine generator set at least according to the current operating state information and the operating information; According to the target operating state information, the wind turbine generator set is switched to the target operating state.

2. The wind turbine grid-connected control method according to claim 1, characterized in that: If the state indicated by the current operating state information is a shutdown state, determining the target operating state information of the wind turbine generator set at least according to the current operating state information and the operating information includes: Get wind speed information; Extracting the average wind speed value within a preset historical time from the wind speed information; Extracting a first preset cut-in wind speed value from the operation information; If the average wind speed value within the historical preset time is greater than the first preset cut-in wind speed value, it is determined that the target operation information of the wind turbine generator set is an anti-resonance operation state.

3. The wind turbine grid-connected control method according to claim 2, characterized in that: The first preset cut-in wind speed information is eighty percent of the set cut-in wind speed threshold.

4. The wind turbine grid-connected control method according to claim 1, characterized in that: If the state indicated by the current operating state information is an anti-resonance state, determining the target operating state information of the wind turbine generator set at least according to the current operating state information and the operating information includes: Extract the average pitch angle of three blades from the operation information; If the average pitch angle of the three blades is greater than the set pitch angle and lasts for a preset time, it is determined that the target operating state information of the wind turbine generator set is the waiting grid-connected operating state.

5. The wind turbine grid-connected control method according to claim 1, characterized in that: If the state indicated by the current operation state information is a waiting grid-connected operation state, determining the target operation state information of the wind turbine generator set at least according to the current operation state information and the operation information includes: Extracting the generator speed value from the operation information; If the generator speed value is greater than the grid-connected speed value, it is determined that the target operating state of the wind turbine generator set is a grid-connected operating state.

6. The wind turbine grid-connected control method according to claim 1, characterized in that: If the state indicated by the current operation state information is a grid-connected operation state, determining the target operation state information of the wind turbine generator set at least according to the current operation state information and the operation information includes: Extracting the generator speed value from the operation information; If the generator speed value is less than the grid-connected speed value, the target operating state of the wind turbine generator set is determined to be a waiting operating state.

7. The wind turbine grid-connected control method according to claim 1, characterized in that: If the state indicated by the current operation state information is a waiting operation state, determining the target operation state information of the wind turbine generator set at least according to the current operation state information and the operation information includes: Extract the effective value of unit vibration, unit speed, significant characteristic frequency and blade angle from the operating information; If the effective value of the unit vibration is greater than the set unit vibration value, the unit speed is in the resonant speed area, the significant characteristic frequency is confirmed as the tower frequency and the blade angle is at the minimum limit angle, and it lasts for 1 minute, then the target operating state of the wind turbine is determined to be the anti-resonance operating state.

8. The wind turbine grid-connected control method according to claim 1, characterized in that: If the state indicated by the current operating state information is an anti-resonance operating state, determining the target operating state information of the wind turbine generator set at least according to the current operating state information and the operating information includes: Get wind speed information; Extracting the average wind speed value within a preset historical time from the wind speed information; Extracting a second preset cut-in wind speed value from the operation information; If the average wind speed value within the historical preset time is less than the second preset cut-in wind speed value, it is determined that the target operation information of the wind turbine generator set is a shutdown state.

9. A wind turbine grid-connected control device, characterized in that: The device comprises: A first acquisition unit, used to acquire current operating status information and operating information of the wind turbine generator set; A second acquisition unit, used to acquire wind speed information; A first processing unit, configured to determine target operating state information of the wind turbine generator set at least according to the current operating state information and the operating information; The second processing unit is used to switch the wind turbine set to a target operating state according to the target operating state information.

10. An electronic device, characterized in that: It includes a processor, an input device, an output device and a memory, which are interconnected, wherein the memory is used to store a machine program, the machine program includes program instructions, and the processor is configured to call the program instructions to execute the wind turbine grid-connected control method according to any one of claims 1 to 8.

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