Variable pitch control method, system and equipment for wind generating set and medium

Abstract

The invention relates to the technical field of wind turbine generator variable pitch control, in particular to a wind turbine generator variable pitch control method, system and equipment and a medium. The method comprises the following steps: acquiring current wind power cabin anemograph wind speed data, and acquiring variable pitch motor temperature data corresponding to a wind power blade; the wind speed data and the variable-pitch motor temperature data are averaged, and wind speed average data and variable-pitch motor average temperature data are obtained; when the average wind speed data is in a wind speed threshold range and the average temperature data of the variable-pitch motor is in a temperature threshold range, controlling the corresponding variable-pitch motor according to a first condition obtained by a variable-pitch rate control demand value corresponding to each blade and a variable-pitch rate dead zone set value; according to the method, the power generation loss caused by shutdown protection due to the over-temperature fault of the variable-pitch motor is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine pitch control, and in particular to a wind turbine pitch control method, system, equipment and medium. Background Art

[0002] The blades of wind turbines are connected to the hub casting by the pitch bearing. The pitch motor is connected to the pitch bearing through a reduction gearbox and a pitch pinion, and changes the blade angle by driving the pitch bearing. Since the pitch bearing changes frequently and is subjected to large variable loads, if the power control method of the unit is improper or the pitch bearing is not lubricated properly, it will lead to problems such as increased mechanical wear. According to the design requirements of the unit, the operating temperature of the pitch motor will not exceed the set value. If it exceeds the set value, an alarm will be sounded due to excessive temperature. If it exceeds the shutdown threshold, it will shut down for protection, resulting in power generation loss.

[0003] When the impeller of a traditional wind turbine reaches the rated speed, as the wind speed increases, the target speed of power control no longer changes, and the given torque is increased at the same time, and the speed increase does not directly lead to a significant increase in torque. Therefore, when the wind speed changes greatly, it is necessary to control the impeller speed by feathering the propeller. Since the power of the unit is far from the rated power in most cases, it is necessary to change the pitch again to control the impeller speed or the output power of the unit, resulting in frequent pitch changes, which further causes the pitch motor to overheat and cause shutdown.

[0004] Traditionally, speed and torque control are decoupled separately to minimize frequent pitch changes. However, there is a certain deviation between the unit design simulation model and the actual unit. On the one hand, the fixed decoupling control parameters may not be suitable for the actual operation of the unit, and on the other hand, the parameters cannot be modified in real time. At the same time, the wind conditions of each unit are inconsistent, resulting in some units still having frequent pitch changes under inappropriate control methods. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a wind turbine generator set pitch control method, system, equipment and medium to address the technical problem of frequent pitch changes leading to unit failure during wind turbine generator set control.

[0006] The objective of the present invention is achieved by the following technical solutions: In a first aspect, the present invention provides a method for controlling a pitch change of a wind turbine generator set, comprising: Obtain the current wind speed data from the anemometer in the wind turbine cabin and the temperature data of the variable pitch motor corresponding to the wind turbine blades; The wind speed data and the temperature data of the variable pitch motor are averaged to obtain the average wind speed data and the average temperature data of the variable pitch motor; When the average wind speed data is within the wind speed threshold range and the average temperature data of the pitch motor is within the temperature threshold range, the corresponding pitch motor is controlled according to the first condition, which is obtained according to the pitch rate control demand value corresponding to each blade and the pitch rate dead zone setting value.

[0007] As a further improvement of the present invention, the wind speed data and the pitch motor temperature data are averaged to obtain the average wind speed data and the average pitch motor temperature data, which specifically includes: Performing sliding average processing on the wind speed data, where a window parameter of the sliding average processing is a first parameter value, to obtain average wind speed data; The three acquired variable pitch motor temperature data are respectively subjected to sliding average processing, the window parameter of the sliding average processing is the second parameter, and the variable pitch motor average temperature data is obtained by averaging the variable pitch temperature data after the sliding average processing.

[0008] As a further improvement of the present invention, the first parameter is 0.1~1 second, and the second parameter is 0.1~1 second.

[0009] As a further improvement of the present invention, the first condition is obtained according to the pitch rate control demand value corresponding to each blade and the pitch rate dead zone setting value, and specifically includes: The first condition is that the pitch rate control demand value is not less than the negative value of the pitch rate dead zone, and is not greater than the positive value of the pitch rate dead zone.

[0010] As a further improvement of the present invention, controlling the corresponding pitch motor according to the first condition specifically includes: when the pitch rate control demand value corresponding to each blade meets the first condition, controlling the pitch motor not to act; otherwise, controlling the pitch motor to perform pitch action.

[0011] As a further improvement of the present invention, when the pitch rate control demand value corresponding to each blade meets the first condition, the pitch motor is controlled not to act, otherwise, the pitch motor is controlled to perform pitch action, specifically including: Obtain the pitch speed control demand values ​​corresponding to the three pitch motors respectively, and determine the pitch speed dead zone setting value; Determine whether the first condition is met according to the pitch rate control demand values ​​corresponding to the three pitch motors and the pitch rate dead zone setting values; When the pitch rate control demand values ​​of the three pitch motors simultaneously meet the first condition, the pitch rate control demand values ​​corresponding to the three pitch motors are respectively set to 0, and the corresponding pitch motors are controlled not to move; When the pitch rate control demand value of the pitch motor does not meet the first condition, the pitch rate control demand value corresponding to the pitch motor that does not meet the first condition is used as a control instruction, and the control instruction is transmitted to the pitch motor to perform the pitch action.

[0012] As a further improvement of the present invention, the first wind speed threshold in the wind speed threshold range is 6-8 m / s, and the second wind speed threshold in the wind speed threshold range is 9-12 m / s; The first temperature threshold in the temperature threshold range is 100-110° C., and the second temperature threshold in the temperature threshold range is 120-140° C.

[0013] In a second aspect, the present invention provides a wind turbine generator set pitch control system, which is used to implement the above-mentioned wind turbine generator set pitch control method, comprising: A data acquisition module is used to obtain the current wind speed data of the wind turbine cabin anemometer and the temperature data of the variable pitch motor corresponding to the wind turbine blades; The data processing module is used to average the wind speed data and the temperature data of the variable pitch motor to obtain the average wind speed data and the average temperature data of the variable pitch motor; The pitch control module controls the corresponding pitch motor according to a first condition when the average wind speed data is within the wind speed threshold range and the average temperature data of the pitch motor is within the temperature threshold range. The first condition is obtained according to the pitch rate control demand value corresponding to each blade and the pitch rate dead zone setting value.

[0014] In a third aspect, the present invention provides a computer-readable storage medium storing one or more programs, wherein the one or more programs include instructions, which, when executed by a computing device, enable the computing device to execute the above-mentioned wind turbine pitch control method.

[0015] In a fourth aspect, the present invention provides a computing device, comprising: One or more processors, a memory and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs include steps for executing the above-mentioned wind turbine pitch control method.

[0016] The beneficial effect of the present invention is that the present invention provides a wind turbine pitch control method, which controls the pitch rate dead zone by judging the pitch motor temperature, so as to avoid the power generation loss caused by the shutdown protection due to the pitch motor over-temperature failure to the greatest extent. The present invention can directly analyze the pitch motor temperature, which is a unit operating characteristic, and establish a direct connection with the pitch rate dead zone, thereby reducing unnecessary pitch actions and thus reducing the pitch motor over-temperature, and minimizing the traditional shutdown protection method, thereby reducing the power generation loss caused by shutdown.

[0017] Analyze the relationship between the current wind speed and the pitch change, directly control the pitch change rate dead zone in the wind speed section where frequent pitch changes are most likely to occur, and then do not respond to frequent pitch changes caused by improper control methods, and protect the pitch actuator from fatigue damage caused by frequent actions. The first condition combines the pitch rate control demand value corresponding to each blade and the pitch rate dead zone setting value, which can control the pitch motor more finely and make the blade pitch change operation more accurate and efficient. The present invention reduces the fatigue damage caused by frequent pitch changes caused by improper control methods and the number of shutdowns caused by over-temperature failures of the pitch motor by introducing a pitch rate dead zone.

[0018] Furthermore, by performing sliding average processing on the wind speed data and setting a suitable first parameter value as the window parameter, the fluctuation and noise in the wind speed data can be effectively smoothed. This enables the obtained average wind speed data to more accurately reflect the actual wind speed conditions over a period of time, avoids misjudgment caused by instantaneous abnormal values, and provides a more reliable data basis for subsequent control decisions. Performing sliding average processing on the temperature data of the three variable pitch motors respectively, and averaging the processed temperature data again, can also reduce the fluctuation of the temperature data. Especially when multiple variable pitch motors are running at the same time, this processing method can comprehensively consider the temperature change trend of each motor, obtain more representative average temperature data of the variable pitch motor, and improve the accuracy of judging the temperature status of the variable pitch motor. Sliding average processing can effectively filter out abnormal data and reduce misoperation caused by data errors. Reliable processing of wind speed data and variable pitch motor temperature data reduces the risk of system failure due to erroneous data and improves the reliability of the entire wind power system.

[0019] Furthermore, the set pitch rate dead zone works in both the positive and negative directions. When the pitch rate command given by the controller is less than or equal to the dead zone, a command of 0 is sent to the pitch actuator to prevent the pitch actuator from operating. By clarifying the relationship between the pitch rate control demand value and the positive and negative values ​​of the pitch rate dead zone, an accurate standard is provided for the control of the pitch motor. This allows the pitch operation to be performed within a reasonable range, avoiding excessive or insufficient pitch, and improving the accuracy and efficiency of the pitch.

[0020] Furthermore, by judging the temperature of the pitch motors of the three blades, it is determined whether the pitch motor overheating situation really exists, thereby avoiding the pitch inaction caused by the introduction of the pitch rate dead zone due to the failure of a single pitch motor.

[0021] The system of the present invention can be implemented by upgrading the wind turbine control software without installing any other hardware, and the transformation cost is low. It can avoid the shutdown of the variable pitch motor due to overheating caused by frequent pitch changes while ensuring the safe operation of the unit to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention 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 some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 is a schematic flow chart of a method for controlling a pitch change of a wind turbine generator set according to an embodiment of the present invention; Figure 2 Schematic diagram of the structure of a wind turbine generator set pitch control system in an embodiment of the present invention; Figure 3 It is a schematic diagram of the structure of an electronic device in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to make the purpose and technical solution of the present invention clearer and easier to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments, wherein the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0026] Example 1 like Figure 1 As shown, this embodiment provides a method for controlling the pitch of a wind turbine generator set, which introduces the pitch dead zone into the pitch control through the potential fault point of the pitch motor overheating. When the potential fault of the pitch motor overheating occurs, the unnecessary pitch action is excluded from the actual pitch action, thereby avoiding the power outage loss caused by the pitch motor overheating shutdown while ensuring the safe operation of the unit, and avoiding the fatigue damage of the pitch actuator caused by frequent pitch changes. The following is a specific implementation method.

[0027] First, obtain the current wind speed data Vwind of the anemometer in the wind turbine cabin, and obtain the temperature data Ti_pitch (i=1, 2, 3) of the variable pitch motors corresponding to the three wind turbine blades respectively.

[0028] The wind speed data and the pitch motor temperature data are averaged to obtain the average wind speed data and the average pitch motor temperature data. The specific processing method is as follows: Perform sliding average processing on the wind speed data, where the window parameter of the sliding average processing is the first parameter value mov1, and obtain the wind speed average data F_Vwind; The three acquired variable pitch motor temperature data are respectively subjected to sliding average processing, the window parameter of the sliding average processing is the second parameter mov2, and the variable pitch motor average temperature data F_Tavg_pitch is obtained by averaging the variable pitch temperature data after the sliding average processing.

[0029] In this embodiment, the first parameter is 0.1 to 1 second, and the second parameter is 0.1 to 1 second.

[0030] When the average wind speed data is within the wind speed threshold range and the average temperature data of the pitch motor is within the temperature threshold range, the corresponding pitch motor is controlled according to the first condition. The first condition is obtained according to the pitch rate control demand value pitchdemand_i corresponding to each blade and the pitch rate deadband setting value pitch_deadband.

[0031] Get the wind speed threshold range (Threshold_wind1, Threshold_wind2) and the temperature threshold range (Threshold_T_pitch1, Threshold_T_pitch2). In this embodiment, the first wind speed threshold Threshold_wind1 in the wind speed threshold range is 6-8 m / s, and the second wind speed threshold Threshold_wind2 in the wind speed threshold range is 9-12 m / s. The first temperature threshold Threshold_T_pitch1 in the temperature threshold range is 100-110°C, and the second temperature threshold Threshold_T_pitch2 in the temperature threshold range is 120-140°C.

[0032] When the pitch rate control demand value corresponding to each blade meets the first condition, the pitch motor is controlled not to move, otherwise, the pitch motor is controlled to perform pitch action, wherein the first condition is: the pitch rate control demand value is not less than the negative value of the pitch rate dead zone -pitch_deadband, and is not greater than the positive value of the pitch rate dead zone +pitch_deadband.

[0033] The methods specifically include: Obtain the pitch speed control demand values ​​corresponding to the three pitch motors respectively, and determine the pitch speed dead zone setting value; Determine whether the first condition is met according to the pitch rate control demand values ​​corresponding to the three pitch motors and the pitch rate dead zone setting values; When the pitch rate control demand values ​​of the three pitch motors simultaneously meet the first condition, the pitch rate control demand values ​​corresponding to the three pitch motors are respectively set to 0, and the corresponding pitch motors are controlled not to move; When the variable pitch speed control demand value of the variable pitch motor does not meet the first condition, the variable pitch speed control demand value corresponding to the variable pitch motor that does not meet the first condition is used as a control instruction, and the control instruction is transmitted to the variable pitch motor to perform the variable pitch action. By introducing the variable pitch speed dead zone, fatigue damage caused by frequent pitch changes caused by improper control methods and frequent actions of the variable pitch actuator are reduced, as well as the number of shutdowns caused by over-temperature failures of the variable pitch motor.

[0034] Among the above parameters, mov1, mov2, Threshold_wind1, Threshold_wind2, Threshold_T_pitch1, Threshold_T_pitch2, pitch_deadband are jointly determined by the wind turbine simulation in a computer environment or the actual test results of the on-site prototype or the actual operation data of the batch operation unit. Table 1 shows the range of generally selectable values: Table 1: Parameter ranges

[0035] The pitch speed dead zone is controlled by judging the temperature of the pitch motor to avoid the power loss caused by the shutdown protection due to the pitch motor over-temperature failure to the greatest extent. The pitch speed dead zone is controlled by judging the wind speed, and the pitch speed dead zone control is strictly limited to the effective wind speed to avoid over-speed shutdown or heavy load caused by untimely pitch change in other wind speed ranges.

[0036] The present invention can directly analyze the unit operating characteristic of the variable pitch motor temperature, which establishes a direct connection with the variable pitch rate dead zone, reduce unnecessary variable pitch actions and thus reduce the overtemperature of the variable pitch motor, minimize the traditional shutdown protection method, and thereby reduce the power generation loss caused by shutdown.

[0037] By analyzing the relationship between the current wind speed and pitch change, the pitch change rate dead zone is directly controlled in the wind speed section where frequent pitch changes are most likely to occur, thereby not responding to frequent pitch changes caused by improper control methods, and protecting the pitch actuator from fatigue damage caused by frequent actions.

[0038] Example 2 like Figure 2 As shown, this embodiment provides a wind turbine pitch control system, which is used to implement the wind turbine pitch control method in Example 1, including a data acquisition module, a data processing module and a pitch control module; each module specifically includes: A data acquisition module is used to obtain the current wind speed data of the wind turbine cabin anemometer and the temperature data of the variable pitch motor corresponding to the wind turbine blades; The data processing module is used to average the wind speed data and the temperature data of the variable pitch motor to obtain the average wind speed data and the average temperature data of the variable pitch motor; The pitch control module controls the corresponding pitch motor according to a first condition when the average wind speed data is within the wind speed threshold range and the average temperature data of the pitch motor is within the temperature threshold range; wherein the first condition is obtained according to the pitch rate control demand value corresponding to each blade and the pitch rate dead zone setting value.

[0039] The system does not require the installation of any other hardware, and can be implemented by upgrading the wind turbine control software. The transformation cost is low, and it can avoid the shutdown of the pitch motor due to overheating caused by frequent pitch changes while ensuring the safe operation of the unit to a certain extent.

[0040] Example 3 In another embodiment of the present invention, the present invention also provides a storage medium, specifically a computer-readable storage medium (Memory), which is a memory device in a terminal device for storing programs and data. It is understandable that the computer-readable storage medium here can include both the built-in storage medium in the terminal device and the extended storage medium supported by the terminal device, and can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it. The computer-readable storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space, and these instructions can be one or more computer programs (including program codes). It should be noted that more specific examples (non-exhaustive list) of the computer-readable storage medium here include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0041] Computer readable storage media also include data signals propagated in baseband or as part of a carrier wave, which carry readable program codes. Such propagated data signals can take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. The readable storage medium can also be any readable medium other than a readable storage medium, which can send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, device, or device. The program code contained on the readable storage medium can be transmitted using any appropriate medium, including but not limited to wireless, wired, optical cable, RF, etc., or any suitable combination of the above.

[0042] Program code for performing the operations of the present invention may be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, etc., and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as a separate software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., through the Internet using an Internet service provider).

[0043] The processor may load and execute one or more instructions stored in the computer-readable storage medium to implement the corresponding steps of the wind turbine generator set pitch control method in the above embodiment; the processor may load and execute the following steps of one or more instructions in the computer-readable storage medium: Step 1: Get the current cabin anemometer wind speed Vwind; Step 2: Perform sliding average of mov1 parameters on Vwind; Step 3: Get the sliding average F_Vwind; Step 4: Get the temperature T1_pitch of pitch motor 1; Step 5: Perform sliding average of mov2 parameters on T1_pitch to obtain F_T1_pitch; Step 6: Get the temperature T2_pitch of pitch motor 2; Step 7: Perform sliding average of mov2 parameters on T2_pitch to obtain F_T2_pitch; Step 8: Get the temperature T3_pitch of pitch motor 3; Step 9: Perform sliding average of mov2 parameters on T3_pitch to obtain F_T3_pitch; Step 10: Take the average value of the three sliding average pitch motor temperatures to obtain F_Tavg_pitch; Step 11: Get Threshold_wind1 (wind speed threshold), 2 and Threshold_T_pitch1, 2 (temperature threshold) Step 12: Determine whether Threshold_wind2≥F_Vwind≥Threshold_wind1 and Threshold_T_pitch2≥F_Tavg_pitch (average temperature of pitch motor)≥Threshold_T_pitch1 are simultaneously established; Step 13: If not, the judgment logic terminates; Step 14: If yes, then obtain the pitch rate deadband setting value pitch_deadband; Step 15: Get the pitch rate control demand pitchdemand_1; Step 16: Determine whether +pitch_deadband (pitch rate dead zone setting value) ≥ pitchdemand_1 (pitch rate control demand) ≥ -pitch_deadband is established; Step 17: If yes, then force pitchdemand_1 to be equal to 0, that is, the pitch motor does not operate; Step 18: If not, the pitchdemand_1 instruction is transmitted to the pitch motor to perform the pitch action; Step 19: Get the pitch rate control demand pitchdemand_2; Step 20: Determine whether +pitch_deadband≥pitchdemand_2≥-pitch_deadband holds; Step 21: If yes, then force pitchdemand_2 to be equal to 0, that is, the pitch motor does not move; Step 22: If not, the pitchdemand_2 instruction is transmitted to the pitch motor to perform the pitch action; Step 23: Get the pitch rate control demand pitchdemand_3; Step 24: Determine whether +pitch_deadband≥pitchdemand_3≥-pitch_deadband holds; Step 25: If yes, then force pitchdemand_3 to be equal to 0, that is, the pitch motor does not move; Step 26: If not, the pitchdemand_3 instruction is sent to the pitch motor to perform the pitch action.

[0044] Example 4 See also Figure 3 , the terminal device is a computer device, and the computer device 60 of this embodiment includes: a processor 61, a memory 62, and a computer program 63 stored in the memory 62 and executable on the processor 61. When the computer program 63 is executed by the processor 61, the wind turbine generator set pitch control method in the embodiment is implemented. To avoid repetition, it is not described one by one here. Alternatively, when the computer program 63 is executed by the processor 61, the functions of each model / unit in the computing system of embodiment 1 are implemented. To avoid repetition, it is not described one by one here.

[0045] The computer device 60 may be a computing device such as a desktop computer, a notebook, a PDA, or a cloud server. The computer device 60 may include, but is not limited to, a processor 61 and a memory 62. Those skilled in the art will appreciate that Figure 3 This is only an example of the computer device 60 and does not constitute a limitation of the computer device 60. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the computer device may also include input and output devices, network access devices, buses, etc.

[0046] The processor 61 may be a central processing unit (CPU), other general-purpose processors, central processing units, graphics 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, data processing logic based on quantum computing, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0047] The memory 62 may be an internal storage unit of the computer device 60, such as a hard disk or memory of the computer device 60. The memory 62 may also be an external storage device of the computer device 60, such as a plug-in hard disk, a smart memory card (SmartMediaCard, SMC), a secure digital (SecureDigital, SD) card, a flash card (FlashCard), etc. equipped on the computer device 60.

[0048] Furthermore, the memory 62 may include both an internal storage unit of the computer device 60 and an external storage device. The memory 62 is used to store computer programs and other programs and data required by the computer device. The memory 62 may also be used to temporarily store data that has been output or is to be output.

[0049] Any reference to a memory, database or other medium used in the embodiments provided in this application may include at least one of a non-volatile and a volatile memory. Non-volatile memory may include a read-only memory (ROM), a magnetic tape, a floppy disk, a flash memory, an optical memory, a high-density embedded non-volatile memory, a resistive random access memory (ReRAM), a magnetic random access memory (MRAM), a ferroelectric random access memory (FRAM), a phase change memory (PCM), a graphene memory, etc. Volatile memory may include a random access memory (RAM) or an external cache memory, etc. As an illustration and not limitation, RAM may be in various forms, such as a static random access memory (SRAM) or a dynamic random access memory (DRAM), etc.

[0050] The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. The non-relational database may include a distributed database based on blockchain, etc., but is not limited thereto. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but is not limited thereto.

Claims

1. A wind turbine generator set pitch control method, characterized in that: include: Obtain the current wind speed data from the anemometer in the wind turbine cabin and the temperature data of the variable pitch motor corresponding to the wind turbine blades; The wind speed data and the temperature data of the variable pitch motor are averaged to obtain the average wind speed data and the average temperature data of the variable pitch motor; When the average wind speed data is within the wind speed threshold range and the average temperature data of the pitch motor is within the temperature threshold range, the corresponding pitch motor is controlled according to the first condition, which is obtained according to the pitch rate control demand value corresponding to each blade and the pitch rate dead zone setting value.

2. The wind turbine generator set pitch control method according to claim 1, characterized in that: The averaging of the wind speed data and the pitch motor temperature data to obtain the average wind speed data and the average pitch motor temperature data specifically includes: Performing sliding average processing on the wind speed data, where a window parameter of the sliding average processing is a first parameter value, to obtain average wind speed data; The three acquired variable pitch motor temperature data are respectively subjected to sliding average processing, the window parameter of the sliding average processing is the second parameter, and the variable pitch motor average temperature data is obtained by averaging the variable pitch temperature data after the sliding average processing.

3. The wind turbine generator set pitch control method according to claim 2, characterized in that: The first parameter is 0.1~1 second, and the second parameter is 0.1~1 second.

4. The wind turbine generator set pitch control method according to claim 1, characterized in that: The first condition is obtained according to the pitch rate control demand value corresponding to each blade and the pitch rate dead zone setting value, and specifically includes: The first condition is that the pitch rate control demand value is not less than the negative value of the pitch rate dead zone, and is not greater than the positive value of the pitch rate dead zone.

5. The wind turbine generator set pitch control method according to claim 4, characterized in that: Controlling the corresponding pitch motor according to the first condition specifically includes: when the pitch rate control demand value corresponding to each blade meets the first condition, controlling the pitch motor not to act; otherwise, controlling the pitch motor to perform pitch action.

6. The wind turbine generator set pitch control method according to claim 5, characterized in that: When the pitch rate control demand value corresponding to each blade meets the first condition, the pitch motor is controlled not to act, otherwise, the pitch motor is controlled to perform pitch action, specifically including: Obtain the pitch speed control demand values ​​corresponding to the three pitch motors respectively, and determine the pitch speed dead zone setting value; Determine whether the first condition is met according to the pitch rate control demand values ​​corresponding to the three pitch motors and the pitch rate dead zone setting values; When the pitch rate control demand values ​​of the three pitch motors simultaneously meet the first condition, the pitch rate control demand values ​​corresponding to the three pitch motors are respectively set to 0, and the corresponding pitch motors are controlled not to move; When the pitch rate control demand value of the pitch motor does not meet the first condition, the pitch rate control demand value corresponding to the pitch motor that does not meet the first condition is used as a control instruction, and the control instruction is transmitted to the pitch motor to perform the pitch action.

7. The wind turbine generator set pitch control method according to claim 1, characterized in that: The first wind speed threshold in the wind speed threshold range is 6-8 m / s, and the second wind speed threshold in the wind speed threshold range is 9-12 m / s; The first temperature threshold in the temperature threshold range is 100-110° C., and the second temperature threshold in the temperature threshold range is 120-140° C.

8. A wind turbine pitch control system, used to implement the wind turbine pitch control method according to any one of claims 1 to 7, characterized in that: include: A data acquisition module is used to obtain the current wind speed data of the wind turbine cabin anemometer and the temperature data of the variable pitch motor corresponding to the wind turbine blades; The data processing module is used to average the wind speed data and the temperature data of the variable pitch motor to obtain the average wind speed data and the average temperature data of the variable pitch motor; The pitch control module controls the corresponding pitch motor according to a first condition when the average wind speed data is within the wind speed threshold range and the average temperature data of the pitch motor is within the temperature threshold range. The first condition is obtained according to the pitch rate control demand value corresponding to each blade and the pitch rate dead zone setting value.

9. A computer-readable storage medium storing one or more programs, characterized in that: The one or more programs include instructions, and when the instructions are executed by a computing device, the computing device executes the wind turbine generator set pitch control method according to any one of claims 1 to 7.

10. A computing device, characterized in that: include: One or more processors, a memory and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs include steps for executing the wind turbine pitch control method according to any one of claims 1 to 7.

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