Wind turbine control method, device, terminal and storage medium

Abstract

The present invention relates to the field of wind power generation technology, and provides a control method, device, terminal and storage medium for a wind turbine. The method comprises: acquiring control parameters of the wind power generation system in real time; the control parameters include the output power of the wind turbine generator set, the fan speed, the wind speed and the voltage of the battery module; respectively judging whether each control parameter at the current moment exceeds the corresponding set value range, and if there is a control parameter at the current moment that exceeds the corresponding set value range, adjusting the blade angle of the wind turbine generator set. Compared with the method of adjusting the blade angle by fan speed, the present application controls the blade angle change from four aspects: wind speed, fan speed, generator output power and battery voltage, so as to ensure that the generator output power quickly and accurately follows the change of the set power, thereby improving the control accuracy of the wind turbine generator.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a control method, device, terminal and storage medium for a wind power generator. Background Art

[0002] Wind turbines are electrical equipment that converts wind energy into mechanical work, which drives the rotor to rotate and finally outputs alternating current. Wind turbines generally include components such as wind rotors, generators, stabilisers (tail fins), towers, speed limit safety mechanisms and energy storage devices. As the global energy structure transforms towards a cleaner and renewable direction, wind energy, as an important component, has become the focus of our research. The blade angle control system of wind turbines is crucial to improving power generation efficiency and ensuring operational stability.

[0003] The prior art usually adjusts the blade angle of a wind turbine based on the speed of the wind turbine, but this method may result in inaccurate control, leading to poor stability of the generator speed. Summary of the invention

[0004] The embodiments of the present invention provide a control method, device, terminal and storage medium of a wind turbine generator to solve the problem of poor accuracy in generator blade angle control in the prior art.

[0005] In a first aspect, an embodiment of the present invention provides a control method for a wind turbine generator, which is applied to a wind power generation system, wherein the wind power generation system comprises a wind turbine generator set, a battery module, a rectifier module and an inverter module; the output end of the wind turbine generator set is connected to the AC end of the rectifier module, the DC end of the rectifier module is connected to the battery module, the battery module is connected to the DC end of the inverter module, and the AC end of the inverter module is used to connect a load; the method comprises:

[0006] Acquiring control parameters of the wind power generation system in real time; the control parameters include the output power of the wind turbine generator set, the wind turbine speed, the wind speed and the voltage of the battery module;

[0007] Determine whether each control parameter at the current moment exceeds the corresponding set value range;

[0008] If a control parameter exceeds a corresponding set value range at the current moment, the blade angle of the wind turbine generator set is adjusted.

[0009] In a second aspect, an embodiment of the present invention provides a control device for a wind turbine generator, which is applied to a wind power generation system, wherein the wind power generation system comprises a wind turbine generator set, a battery module, a rectifier module and an inverter module; the output end of the wind turbine generator set is connected to the AC end of the rectifier module, the DC end of the rectifier module is connected to the battery module, the battery module is connected to the DC end of the inverter module, and the AC end of the inverter module is used to connect a load; the device comprises:

[0010] A control parameter acquisition module, used to acquire control parameters of the wind power generation system in real time; the control parameters include the output power of the wind turbine generator set, the wind turbine speed, the wind speed and the voltage of the battery module;

[0011] A judgment module is used to judge whether each control parameter at the current moment exceeds the corresponding set value range;

[0012] The blade angle adjustment module is used to adjust the blade angle of the wind turbine generator set if a control parameter exceeds a corresponding set value range at the current moment.

[0013] In a third aspect, an embodiment of the present invention provides a terminal, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of the wind turbine control method described in any possible implementation of the first aspect above are implemented.

[0014] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the wind turbine control method described in any possible implementation of the first aspect above are implemented.

[0015] The embodiment of the present invention provides a control method, device, terminal and storage medium for a wind turbine generator. The method acquires the control parameters of the wind power generation system in real time; the control parameters include the output power of the wind turbine generator set, the fan speed, the wind speed and the voltage of the battery module; then, it is judged whether each control parameter exceeds the corresponding set value range at the current moment, and if there is a control parameter that exceeds the corresponding set value range at the current moment, the blade angle of the wind turbine generator set is adjusted. Compared with the method of adjusting the blade angle by fan speed, the present application controls the blade angle change from four aspects: wind speed, fan speed, generator output power and battery voltage, so as to ensure that the generator output power quickly and accurately follows the change of the set power, thereby improving the control accuracy of the wind turbine generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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 invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 is a schematic structural diagram of a wind power generation system provided by an embodiment of the present invention;

[0018] Figure 2 is a schematic diagram of a wind turbine blade of a wind turbine provided by an embodiment of the present invention;

[0019] Figure 3 is a flow chart of an implementation of a control method for a wind turbine provided by an embodiment of the present invention;

[0020] Figure 4 is a schematic structural diagram of a control device for a wind turbine provided by an embodiment of the present invention;

[0021] Figure 5 is a schematic diagram of a terminal provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0022] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clear, specific embodiments will be described below in conjunction with the accompanying drawings.

[0024] Figure 1 A schematic diagram of the structure of a wind power generation system provided by an embodiment of the present invention is shown in FIG. Figure 1 As shown, the wind power generation system includes a wind turbine 10, a battery module 13, a rectifier module 11 and an inverter module 12; the output end of the wind turbine 10 is connected to the AC end of the rectifier module 11, the DC end of the rectifier module 11 is connected to the battery module 13, the battery module 13 is connected to the DC end of the inverter module 12, and the AC end of the inverter module 12 is used to connect a load.

[0025] Specifically, in an off-grid state, the electric energy generated by the wind turbine generator set 10 is rectified and filtered by a rectifier module and then charged to a battery module. The rear end of the battery module is connected to an inverter module, which outputs stable AC power to a load through the inverter module.

[0026] The wind turbine generator set 10 includes blades, a shaft, an adjustment mechanism, a gear box, a high-speed shaft and a mechanical brake, a generator and a yaw device. The blades are used to capture the wind and transmit the wind power to the rotor shaft. Figure 2 As shown, the blade angle is the angle between the blade and the vertical plane of the windward surface. When the angle between the lower edge line A1 of the blade root and the windward surface (the plane where all wind turbine blades are located) is 90 degrees, since the blade root is completely perpendicular to the windward surface at this time, the windward area of ​​the blade root area is the smallest, so the blade angle at this time can be defined as zero, and the angle between the lower edge line A1 of the blade root and the lower edge line A2 of the blade tip is 15 degrees, that is, the blade itself has a spin angle, so in fact, when the windward area of ​​the entire blade is the smallest, the blade angle is -8 degrees. When the blade angle is 60 degrees, the blade is parallel to the windward surface and the windward area of ​​the blade is the largest, so the blade angle of the wind turbine can be controlled to vary between -8 degrees and 60 degrees to change the output power of the wind turbine.

[0027] See also Figure 3 , which shows a flow chart of the implementation of the control method of the wind turbine provided by the embodiment of the present invention, and is described in detail as follows:

[0028] S101: Acquire control parameters of the wind power generation system in real time; the control parameters include the output power of the wind turbine generator set, the wind turbine speed, the wind speed and the voltage of the battery module.

[0029] The execution subject of this embodiment may be a controller of the wind power generation system or an external controller, which is not limited here.

[0030] The controller obtains the control parameters of the wind power generation system according to a preset cycle, wherein the control parameters include the output power of the wind turbine generator set, the fan speed, the wind speed and the battery module in the current cycle. Among them, the change of wind speed affects the output power of the wind turbine generator set. The higher the wind speed, the greater the output power of the wind turbine generator set. Therefore, when the power given value remains unchanged, the greater the wind speed, the smaller the blade angle. Secondly, the larger the blade angle, the faster the fan speed, the greater the output power of the wind turbine, and thus the higher the voltage of the battery module. It can be seen that the above four control parameters have a great influence on the control of the blade angle, so the above four control parameters are collected as reference quantities for blade angle control.

[0031] S102: Determine whether each control parameter at the current moment exceeds the corresponding set value range.

[0032] In this embodiment, the control parameter setting values ​​corresponding to the wind turbine generator set at different times are different, and the setting value range corresponding to various setting values ​​can be between a% and b% of the setting value, where a% is less than 1 and b% is greater than 1. Exemplarily, the setting value range can be between 80% and 120% of the setting value, or between 90% and 110% of the setting value.

[0033] Exemplarily, when the power setting value remains unchanged, different wind speeds correspond to different blade angles. The wind speed in the previous cycle is used as the wind speed setting value. If the wind speed in the current cycle exceeds 120% of the wind speed setting value, the blade angle is adjusted down to adapt to the change in wind speed, thereby ensuring that the output power of the wind turbine in the current cycle remains unchanged at the power setting value.

[0034] S103: If a control parameter currently exceeds a corresponding set value range, adjusting the blade angle of the wind turbine generator set.

[0035] In this embodiment, in each cycle, it is determined whether each control parameter exceeds the corresponding set value range. As long as there is a control parameter that exceeds the corresponding set value range, the blade angle of the wind turbine is adjusted so that the output power of the wind turbine can accurately and stably track the output power given value.

[0036] It can be seen from the above embodiments that compared with the method of adjusting the blade angle by using the fan speed, the present application controls the blade angle change from four aspects: wind speed, fan speed, generator output power and battery voltage, to ensure that the generator output power quickly and accurately follows the change of the set power, thereby improving the control accuracy of the wind generator.

[0037] In a possible implementation manner, the set value range includes a maximum set threshold and a minimum set threshold; the specific implementation process of S103 includes:

[0038] S201: If a control parameter exists at the current moment that is greater than the corresponding maximum set threshold, the blade angle of the wind turbine generator set is adjusted to decrease by a unit angle.

[0039] S202: If a control parameter exists at the current moment that is less than the corresponding minimum set threshold, the blade angle of the wind turbine generator set is increased by a unit angle.

[0040] In this embodiment, the unit angle can be 5 degrees to 10 degrees. If a control parameter is greater than the corresponding maximum setting threshold at the current moment, the blade angle of the wind turbine generator set is adjusted down by the unit angle. At the next moment, it is determined again whether a control parameter exceeds the corresponding maximum setting threshold. If so, the blade angle of the wind turbine generator set continues to be adjusted down by the unit angle until the blades of the wind turbine generator set are adjusted to a fully feathered state, that is, the blade angle is adjusted to -8 degrees.

[0041] Correspondingly, if at the current moment there is a control parameter that is less than the corresponding minimum setting threshold, the blade angle of the wind turbine generator set is increased by a unit angle, and at the next moment it is determined again whether there is a control parameter that is less than the corresponding minimum setting threshold. If so, the blade angle of the wind turbine generator set continues to be increased by a unit angle until the blades of the wind turbine generator set are adjusted to a fully flat pitch state, that is, the blade angle is adjusted to 60 degrees.

[0042] Specifically, the blade angle adjustment range is -8 degrees to 60 degrees. Within this angle range, the blades can achieve the best power generation effect under different wind speed conditions. In order to avoid over-limit adjustment of the blade angle, two mechanical limit points for blade movement are set when the blade angle is at -15 degrees and 75 degrees.

[0043] In one possible implementation, the specific implementation process of S101 includes:

[0044] After the wind turbine generator set enters the startup self-check mode, the blade angle is controlled to be adjusted from the current blade angle, and after switching between the fully feathered state and the fully flattened state N times, the blade angle is adjusted to the optimal startup angle; the fully feathered state is the state when the windward area of ​​the blade is the smallest, and the fully flattened state is the state when the windward area of ​​the blade is the largest;

[0045] After the blade angle reaches the optimal starting angle, the starting self-check mode is exited.

[0046] In this embodiment, when the entire wind power generation system is powered on or powered on again after all power is turned off, it first enters the startup self-test mode. In the startup self-test mode, no matter what angle the wind turbine blade is at, the blade angle is first adjusted N times between the fully feathered state and the fully flattened state and then adjusted to the optimal startup angle to achieve self-test of the wind turbine blades. Wherein, N may be greater than or equal to 2, preferably N=2, and the optimal startup angle may be 30 degrees to 40 degrees, preferably, the optimal startup angle is 35 degrees.

[0047] In this embodiment, after the blade angle is adjusted to the optimal starting angle, the generator speed is controlled to increase to a preset speed, and after reaching the starting speed, the wind turbine generator set starts to work. The preset speed is 40 revolutions per minute.

[0048] In one possible implementation, the specific implementation process of S201 includes:

[0049] If a control parameter at the current moment is greater than the corresponding maximum setting threshold, the blade angle of the wind turbine generator set is adjusted to be smaller by a unit angle; and the wind turbine generator set is subjected to a load unloading operation until all control parameters are no greater than the corresponding maximum setting threshold, and then the load unloading operation is stopped.

[0050] In this embodiment, the load shedding function is an important function to ensure the safety of electrical equipment and loads. A load device for load shedding is provided in the wind power generation system, which mainly realizes the additional consumption of electricity exceeding the maximum set threshold value corresponding to the control parameter.

[0051] Specifically, the specific implementation process of S201 includes: if any one of the output power, wind turbine speed, wind speed and voltage of the battery module of the wind turbine exceeds its maximum set threshold, the unloading operation can be started to unload the excess power. At the same time, during the unloading process, the blade angle of the wind turbine is controlled to decrease by a unit angle.

[0052] In a possible implementation, the specific implementation process of S201 may further include:

[0053] If there is a control parameter at the current moment that is greater than the corresponding maximum set threshold, the blade angle of the wind turbine generator set is adjusted to a smaller unit angle;

[0054] If the next moment still monitors that there is a control parameter greater than the corresponding maximum setting threshold, the wind turbine generator set is unloaded until all control parameters are no greater than the corresponding maximum setting threshold, and the unloading operation is stopped. While the unloading operation is being performed, the wind turbine is pitched, even if the blade angle decreases by a unit angle.

[0055] In a possible implementation manner, after S201, the method provided in this embodiment further includes:

[0056] If the blades at the blade angle corresponding to the current moment are already in a fully feathered state, and there are still control parameters at the current moment that exceed the corresponding maximum set threshold, a braking operation is performed on the wind turbine generator set; the fully feathered state is the state when the windward area of ​​the blades is the smallest.

[0057] In this embodiment, if it is detected that a control parameter exceeds a corresponding maximum setting threshold, the blade angle of the wind turbine generator set is adjusted to decrease by a unit angle;

[0058] If after reducing the unit angle, there is no control parameter exceeding the corresponding maximum setting threshold, the blade angle is kept unchanged in the current cycle. If the control parameter still exceeds the corresponding maximum setting threshold after monitoring again, the unloading operation is started and the blade angle is reduced again;

[0059] If after the unloading operation and blade angle adjustment, there is no control parameter exceeding the corresponding maximum setting threshold, the unloading operation is stopped and the blade angle is kept unchanged during the current cycle; if after the wind turbine blades are adjusted to the fully feathered state, there is still a control parameter exceeding the corresponding maximum setting threshold, the braking operation is initiated.

[0060] After the braking operation is started for a preset time, the braking operation is stopped, and in the next cycle, it is monitored again whether there is a control parameter exceeding the corresponding maximum set threshold. If it still exists and the wind turbine blades are still in a fully feathered state, the braking operation is continued to be started, and this is repeated until there is no control parameter exceeding the corresponding maximum set threshold.

[0061] In one possible implementation, the specific implementation process of S102 includes:

[0062] It is determined in sequence whether the output power of the wind turbine generator set, the wind turbine speed, the voltage of the battery module and the wind speed exceed their respective corresponding set value ranges.

[0063] In this embodiment, theoretically, a change in wind speed will affect the change in wind turbine speed, and a change in wind turbine speed will affect the output power of the wind turbine generator set, and the voltage of the battery module will change at the same time. However, when sampling the above four control parameters, there may be a sampling lag for individual control parameters. Therefore, based on the sampling sensitivity factor and taking into account factors such as the safety and stability of power generation control, determining the above judgment priority can improve the accuracy of wind turbine blade angle control.

[0064] In one possible implementation, after performing a braking operation on the wind turbine generator set, the method further includes:

[0065] After the wind turbine generator set performs the braking operation for a preset time period, the wind turbine generator set is controlled to release the braking operation.

[0066] Specifically, the preset time length may be 1 to 5 minutes, and preferably, the preset time length may be 1 minute.

[0067] In one embodiment of the present application, the method provided in this embodiment further includes:

[0068] Obtaining a display request sent by a display terminal, wherein the display request carries a management level of a user;

[0069] Based on the management level of the user, the operating parameters corresponding to the wind power generation system are sent to the display terminal; the operating parameters include control parameters; wherein different management levels correspond to different operating parameters.

[0070] In this embodiment, while controlling the wind turbine generator, a display interface can also be designed to facilitate users to view the working conditions of the wind power generation system.

[0071] Specifically, the original quantities in the working parameters can be collected by the data sampling module of the wind power generation system, and the data sampling module is used for DC component sampling, AC component sampling, frequency sampling, climate environment sampling, mechanical quantity sampling and pitch signal quantity sampling.

[0072] The DC component sampling includes battery side component sampling and control system DC component sampling. Battery side component sampling includes battery pack voltage, battery pack current, battery pack power, minimum threshold voltage and maximum threshold voltage. If BMS (Battry Managment System) is used, all the data above are made into a unit and displayed on the output large screen, and the necessary control management data must be implemented on the local panel. The control system DC component sampling includes DC bus voltage and DC bus current.

[0073] The AC components sample the generator side AC components and the inverter side AC components; the generator side AC components include the generator output voltage, generator output current and generator output power. The inverter side AC components include the inverter input voltage, inverter input current, inverter output voltage, inverter output current and inverter output power.

[0074] Frequency sampling includes generator output frequency and inverter output frequency. Climate environment sampling includes temperature, humidity, wind speed and wind direction. Mechanical quantity sampling includes generator speed. Pitch signal quantity includes retracting limiter signal and opening limiter signal.

[0075] In this embodiment, after obtaining various working parameters, the working parameters are displayed on the display interface. The display interface is divided into multiple management levels. The display interface that can be seen at each management level is different. Taking three levels as an example, the first level is the regional display interface, which mainly realizes all power generation project bases in this region, as well as the overall power generation of each power generation project base, operating status, power supply conditions, climate environment, carbon reduction data, dispatchable power and dispatch direction, etc. Specifically including voltage, current, power, operation / stop, energy storage power, temperature and humidity, wind direction, air pressure, solar radiation, wind speed, overall carbon reduction index, dispatched power, etc.

[0076] The second level is the display interface of the power generation project level, which displays the specific location of the power generation project base, power generation conditions, climate environment, carbon emission reduction data, specific data of each wind power generation equipment, energy storage capacity, energy storage status, and storage power conditions. There are two to three real-time monitoring video screens and a panoramic view of the project site from different angles.

[0077] The third level is the display interface of the wind turbine, which is used to display the specific data of the corresponding wind turbine, including voltage, current, power; bus voltage and current; energy storage device voltage, current, power, maximum floating charge voltage, minimum discharge voltage; wind turbine status (running, stopping, braking, unloading); carbon emission reduction; wind turbine speed; wind speed and direction; cabin temperature; blade angle. At the same time, the interface also has historical data query (including all the above data), operation log record, historical data download (automatically generate EXCEL table export (automatically download and export backup every day), daily, monthly, and annual cumulative display of data and query backup.

[0078] Specifically, the display terminal can be located locally in the wind power generation system or can be remotely connected to the controller. Users can use the display terminal to manually set the MPPT power, blade angle, brake / operation, brake time, ambient light opening time, battery pack float charge voltage, battery pack maximum and minimum output voltage, power, load power supply, etc.

[0079] When the display terminal is located locally, the display terminal mainly displays the specific power generation, voltage, current, atmosphere light on and off time, battery power, voltage, charge and discharge current, inverter voltage, current, and output power (inverter control all-in-one machine) of this wind turbine. It can realize local control of battery charge and discharge, manual atmosphere light time setting, manual opening and closing angle adjustment of wind turbine, manual control of brake and operation, generator power switch setting, and unloading function control.

[0080] Specifically, the controller also has an alarm function, which is divided into local alarm and remote alarm, and the two modes are carried out simultaneously. The alarm function is mainly for battery overcharge and overdischarge alarm, brake alarm, abnormal operation alarm, electrical appliance illegal grounding alarm, excessive power generation alarm, etc. The alarm is generally displayed in the form of red flashing and an alarm sound is emitted at the same time. After the condition is resolved, it will be automatically eliminated or reset manually.

[0081] In one possible implementation, this embodiment provides a wind power generation system, which also includes circuit protection functions, including overvoltage protection, overcurrent protection, reverse connection protection, lightning protection, grounding protection, energy storage battery protection (if any), etc.

[0082] The controllers, inverters and other electrical appliances in the wind power generation system comply with relevant electrical protection standards, and prevent dust, rain, and corrosive gas erosion of individual components. Among them, the inverter is connected to the battery pack, receives the power provided by the battery pack, and has a wide voltage inversion range (±100V) and grid power input function. At the same time, it provides stable voltage, frequency and harmonic output within the range required by the grid power. The wind power generation system also includes an I / O control module, which mainly realizes the purpose of real-time control of the wind turbine and display through remote or local input of relevant parameters. At the same time, it also receives some feedback parameter samples and uploads them to the controller (core CPU) to achieve the idea of ​​interconnection and mutual control. It has parameter output range function, illegal parameter prompt and blocking function.

[0083] It should be understood that the order of execution of the steps in the above embodiment does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0084] The following is an embodiment of the device of the present invention. For details not described in detail therein, reference may be made to the corresponding method embodiment described above.

[0085] Figure 4 The structure diagram of the control device of the wind turbine generator provided by the embodiment of the present invention is shown. For the convenience of description, only the part related to the embodiment of the present invention is shown, which is described in detail as follows:

[0086] like Figure 4 As shown, the control device 100 of the wind turbine generator includes:

[0087] A control parameter acquisition module 110 is used to acquire control parameters of the wind power generation system in real time; the control parameters include the output power of the wind turbine generator set, the wind turbine speed, the wind speed and the voltage of the battery module;

[0088] The judgment module 120 is used to judge whether each control parameter at the current moment exceeds the corresponding set value range;

[0089] The blade angle adjustment module 130 is used to adjust the blade angle of the wind turbine generator set if a control parameter exceeds a corresponding set value range at the current moment.

[0090] In a possible implementation manner, the set value range includes a maximum set threshold and a minimum set threshold; the blade angle adjustment module includes:

[0091] An angle reduction unit, used to reduce the blade angle of the wind turbine generator set by a unit angle if a control parameter exists at a current moment that is greater than a corresponding maximum setting threshold;

[0092] The angle increasing unit is used to increase the blade angle of the wind turbine generator set by a unit angle if a control parameter is less than a corresponding minimum setting threshold at the current moment.

[0093] In a possible implementation, the control parameter acquisition module includes:

[0094] After the wind turbine generator set enters the startup self-check mode, the blade angle is controlled to be adjusted from the current blade angle, and after switching between the fully feathered state and the fully flattened state N times, the blade angle is adjusted to the optimal startup angle; the fully feathered state is the state when the windward area of ​​the blade is the smallest, and the fully flattened state is the state when the windward area of ​​the blade is the largest;

[0095] After the blade angle reaches the optimal starting angle, the starting self-check mode is exited.

[0096] In a possible implementation, the angle reduction unit includes:

[0097] If a control parameter at the current moment is greater than the corresponding maximum setting threshold, the blade angle of the wind turbine generator set is adjusted to be smaller by a unit angle; and the wind turbine generator set is subjected to a load unloading operation until all control parameters are no greater than the corresponding maximum setting threshold, and then the load unloading operation is stopped.

[0098] In a possible implementation manner, the control device of the wind turbine further includes a braking module for:

[0099] If the blades at the blade angle corresponding to the current moment are already in a fully feathered state, and there are still control parameters at the current moment that exceed the corresponding maximum set threshold, a braking operation is performed on the wind turbine generator set; the fully feathered state is the state when the windward area of ​​the blades is the smallest.

[0100] In a possible implementation, the determination module includes:

[0101] It is determined in sequence whether the output power of the wind turbine generator set, the wind turbine speed, the voltage of the battery module and the wind speed exceed their respective corresponding set value ranges.

[0102] In a possible implementation manner, the control device of the wind turbine further includes a display module for:

[0103] Obtaining a display request sent by a display terminal, wherein the display request carries a management level of a user;

[0104] Based on the management level of the user, the operating parameters corresponding to the wind power generation system are sent to the display terminal; the operating parameters include control parameters; wherein different management levels correspond to different operating parameters.

[0105] Figure 5 is a schematic diagram of a terminal provided by an embodiment of the present invention. Figure 5 As shown, the terminal 5 of this embodiment includes: a processor 50 and a memory 51. The memory 51 is used to store a computer program 52, and the processor 50 is used to call and run the computer program 52 stored in the memory 51 to perform the steps in the above-mentioned various wind turbine control method embodiments, such as Figure 3 Alternatively, the processor 50 is used to call and run the computer program 52 stored in the memory 51 to implement the functions of each module / unit in the above-mentioned device embodiments, such as Figure 4 The functions of the modules 110 to 130 are shown.

[0106] Exemplarily, the computer program 52 may be divided into one or more modules / units, which are stored in the memory 51 and executed by the processor 50 to implement the present invention. The one or more modules / units may be a series of computer program instruction segments capable of implementing specific functions, which are used to describe the execution process of the computer program 52 in the terminal 5. For example, the computer program 52 may be divided into Figure 4 Modules 110 to 130 are shown.

[0107] The terminal 5 may be a computing device such as a desktop computer, a notebook, a PDA, or a cloud server. The terminal 5 may include, but is not limited to, a processor 50 and a memory 51. Those skilled in the art will appreciate that Figure 5 It is only an example of terminal 5 and does not constitute a limitation on terminal 5. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the terminal may also include input and output devices, network access devices, buses, etc.

[0108] The processor 50 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0109] The memory 51 may be an internal storage unit of the terminal 5, such as a hard disk or memory of the terminal 5. The memory 51 may also be an external storage device of the terminal 5, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the terminal 5. Further, the memory 51 may include both an internal storage unit of the terminal 5 and an external storage device. The memory 51 is used to store the computer program and other programs and data required by the terminal. The memory 51 may also be used to temporarily store data that has been output or is to be output.

[0110] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0111] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0112] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software 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 the present invention.

[0113] In the embodiments provided by the present invention, it should be understood that the disclosed devices / terminals and methods can be implemented in other ways. For example, the device / terminal embodiments described above are only schematic. For example, the division of the modules or units 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, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0114] 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.

[0115] In addition, each functional unit in each embodiment of the present invention 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 unit may be implemented in the form of hardware or in the form of software functional units.

[0116] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the above-mentioned wind turbine control method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0117] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A control method for a wind turbine, characterized in that: Applied to a wind power generation system, the wind power generation system comprises a wind generator set, a battery module, a rectifier module and an inverter module; the output end of the wind generator set is connected to the AC end of the rectifier module, the DC end of the rectifier module is connected to the battery module, the battery module is connected to the DC end of the inverter module, and the AC end of the inverter module is used to connect a load; The method comprises: Acquiring control parameters of the wind power generation system in real time; the control parameters include the output power of the wind turbine generator set, the wind turbine speed, the wind speed and the voltage of the battery module; Determine whether each control parameter at the current moment exceeds the corresponding set value range; If a control parameter exceeds a corresponding set value range at the current moment, the blade angle of the wind turbine generator set is adjusted.

2. The control method of a wind turbine according to claim 1, characterized in that: The set value range includes a maximum set threshold and a minimum set threshold; If a control parameter at the current moment exceeds a corresponding set value range, adjusting the blade angle of the wind turbine generator set includes: If there is a control parameter at the current moment that is greater than the corresponding maximum set threshold, the blade angle of the wind turbine generator set is adjusted to a smaller unit angle; If a control parameter exists at the current moment that is less than the corresponding minimum set threshold, the blade angle of the wind turbine generator set is increased by a unit angle.

3. The control method of a wind turbine according to claim 1, characterized in that: The real-time acquisition of the control parameters of the wind power generation system includes: After the wind turbine generator set enters the startup self-check mode, the blade angle is controlled to be adjusted from the current blade angle, and after switching between the fully feathered state and the fully flattened state N times, the blade angle is adjusted to the optimal startup angle; the fully feathered state is the state when the windward area of ​​the blade is the smallest, and the fully flattened state is the state when the windward area of ​​the blade is the largest; After the blade angle reaches the optimal starting angle, the starting self-check mode is exited.

4. The control method of a wind turbine according to claim 2, characterized in that: If a control parameter exists at the current moment that is greater than a corresponding maximum setting threshold, then adjusting the blade angle of the wind turbine generator set to a smaller unit angle includes: If a control parameter at the current moment is greater than the corresponding maximum setting threshold, the blade angle of the wind turbine generator set is adjusted to be smaller by a unit angle; and the wind turbine generator set is subjected to a load unloading operation until all control parameters are no greater than the corresponding maximum setting threshold, and then the load unloading operation is stopped.

5. The control method of a wind turbine according to claim 2 or 4, characterized in that: After the blade angle of the wind turbine generator set is reduced by a unit angle if a control parameter exists at the current moment that is greater than the corresponding maximum setting threshold, the method further includes: If the blades at the blade angle corresponding to the current moment are already in a fully feathered state, and there are still control parameters at the current moment that exceed the corresponding maximum set threshold, a braking operation is performed on the wind turbine generator set; the fully feathered state is the state when the windward area of ​​the blades is the smallest.

6. The control method of a wind turbine generator according to claim 1, characterized in that: The step of respectively judging whether each control parameter at the current moment exceeds the corresponding set value range includes: It is determined in sequence whether the output power of the wind turbine generator set, the wind turbine speed, the voltage of the battery module and the wind speed exceed their respective corresponding set value ranges.

7. The control method of a wind turbine generator according to claim 6, characterized in that: The method further comprises: Obtaining a display request sent by a display terminal, wherein the display request carries a management level of a user; Based on the management level of the user, the operating parameters corresponding to the wind power generation system are sent to the display terminal; the operating parameters include control parameters; wherein different management levels correspond to different operating parameters.

8. A control device for a wind turbine generator, characterized in that: Applied to a wind power generation system, the wind power generation system comprises a wind generator set, a battery module, a rectifier module and an inverter module; the output end of the wind generator set is connected to the AC end of the rectifier module, the DC end of the rectifier module is connected to the battery module, the battery module is connected to the DC end of the inverter module, and the AC end of the inverter module is used to connect a load; The device comprises: A control parameter acquisition module, used to acquire control parameters of the wind power generation system in real time; the control parameters include the output power of the wind turbine generator set, the wind turbine speed, the wind speed and the voltage of the battery module; A judgment module is used to judge whether each control parameter at the current moment exceeds the corresponding set value range; The blade angle adjustment module is used to adjust the blade angle of the wind turbine generator set if a control parameter exceeds a corresponding set value range at the current moment.

9. A terminal, characterized in that: It comprises a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the control method of the wind turbine according to any one of claims 1 to 7.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the wind turbine control method as described in any one of claims 1 to 7 are implemented.

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