Wind generating set

Abstract

The wind generating set comprises a tower and a monitoring system, the monitoring system comprises a tilt angle sensor, an auxiliary control system and a main control system, the tilt angle sensor is installed on the tower and used for detecting tilt angle data of the tower, and the auxiliary control system is connected with the tilt angle sensor. The auxiliary control system is used for collecting inclination angle data and processing the inclination angle data, and the main control system is connected with the auxiliary control system and the terminal. According to the wind generating set provided by the embodiment of the invention, the auxiliary control system is additionally arranged, so that the data precision can be improved by utilizing the auxiliary control system, a gyroscope does not need to be arranged, and the cost can be reduced while reliable monitoring of the tower is realized.

Description

Technical Field

[0001] This application relates to the field of wind power generation technology, and in particular to a wind turbine generator set. Background Technology

[0002] As one of the important components of a wind turbine, the tower plays a very important role in the wind turbine unit, and the health of the tower has a very direct relationship with the normal operation of the entire unit.

[0003] Currently, the main methods for monitoring wind turbine towers are using tilt sensors and gyroscopes to assess the potential safety hazards by monitoring the tower's tilt. However, these monitoring methods are costly, increasing the risks and maintenance costs of wind turbine management. Utility Model Content

[0004] This application provides a wind turbine generator set with advantages such as high precision, good real-time performance, and low cost, thereby improving the reliability of wind turbine generator set operation.

[0005] According to an embodiment of this application, a wind turbine generator set is proposed. The wind turbine generator set includes a tower and a monitoring system. The monitoring system includes a tilt sensor, an auxiliary control system, and a main control system. The tilt sensor is installed on the tower and is used to detect the tilt angle data of the tower. The auxiliary control system is connected to the tilt sensor and is used to collect and process the tilt angle data. The main control system is connected to the auxiliary control system and a terminal.

[0006] According to one aspect of the embodiments of this application, the number of tilt sensors is two or more, and the two or more tilt sensors are arranged at intervals along the height direction of the tower, and each tilt sensor is connected to the auxiliary control system.

[0007] According to one aspect of the embodiments of this application, each tilt sensor is located on the same connecting line, and the direction of the connecting line is parallel to the generatrix direction of the tower's cylindrical wall.

[0008] According to one aspect of the embodiments of this application, the tilt sensor is horizontally mounted on the cylinder wall of the tower.

[0009] According to one aspect of the embodiments of this application, tilt sensors are arranged in pairs at both ends of the tower along the height direction.

[0010] According to one aspect of the embodiments of this application, the monitoring system further includes a serial-to-network module and a switch. The switches are arranged in pairs at both ends of the tower along the height direction. The tilt sensor is connected to the serial-to-network module, and the serial-to-network module is connected to the auxiliary control system through the switch.

[0011] According to one aspect of the embodiments of this application, the main control system includes a PLC control system, and the auxiliary control system includes an industrial computer.

[0012] According to one aspect of the embodiments of this application, the auxiliary control system includes a data acquisition module and a data processing module. The data acquisition module is used to acquire tilt angle data, and the data processing module is connected to the data acquisition module and is used to process the tilt angle data.

[0013] According to one aspect of the embodiments of this application, the auxiliary control system further includes a zeroing module, and the data processing module is further configured to verify a set of tilt angle data and obtain a statistical deviation value. The zeroing module is used to zero the tilt angle sensor according to the statistical deviation value.

[0014] According to one aspect of the embodiments of this application, the auxiliary control system further includes a comparison module, which is connected to the data processing module and is used to compare the statistical deviation value of another set of tilt angle data with a preset threshold after the zeroing module zeroes the tilt angle sensor. The comparison module includes at least one of a comparator and a logic circuit.

[0015] The wind turbine generator provided in this application includes a tower and a monitoring system mounted on the tower. The monitoring system includes a tilt sensor, an auxiliary control system, and a main control system. The tilt sensor is mounted on the tower, and the auxiliary control system is connected to the tilt sensor to collect and process tilt data. The main control system is connected to the auxiliary control system and a terminal. Compared to directly connecting the tilt sensor to the main control system, by additionally setting up the auxiliary control system, the data accuracy can be improved, thus eliminating the need for a gyroscope. This reduces costs while achieving reliable tower monitoring. Attached Figure Description

[0016] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the structure of a wind turbine generator set according to an embodiment of this application;

[0018] Figure 2 This is a topology diagram of a monitoring system according to an embodiment of this application.

[0019] In the attached image:

[0020] 10-Tower; 20-Monitoring system; 30-Nacelle; 40-Impeller; 410-Blade; 420-Hub; 50-Foundation platform;

[0021] 1-Tilt sensor; 11-Tower top sensor; 12-Tower bottom sensor; 2-Auxiliary control system; 3-Main control system; 4-Serial-to-network module; 5-Switch; 51-Tower top switch; 52-Tower bottom switch; 6-Server;

[0022] Z-Height Direction.

[0023] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale. Detailed Implementation

[0024] The features and exemplary embodiments of various aspects of this application will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a comprehensive understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this application by illustrating examples. In the accompanying drawings and the following description, at least some well-known structures and techniques are not shown to avoid unnecessarily obscuring the application; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0025] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the wind turbine generator set of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] Please see Figure 1 , Figure 1 This application provides a wind turbine generator set, including a tower 10, a nacelle 30, a generator, a rotor 40, and a foundation platform 50. The tower 10 is connected to the foundation platform 50, the nacelle 30 is located at the top of the tower 10, and the generator is located in the nacelle 30. The rotor 40 includes a hub 420 and multiple blades 410 connected to the hub 420. The rotor 40 is connected to the generator shaft through its hub 420. When wind power acts on the blades 410, it drives the entire rotor 40 and the generator shaft to rotate, thereby converting wind energy into electrical energy. A yaw system is also provided between the tower 10 and the nacelle 30. The yaw system is used to drive the nacelle 30 to rotate relative to the tower 10, so that the rotor 40 always faces the wind, improving power generation efficiency.

[0027] As a crucial component of the wind turbine, the tower 10 plays a vital role in the wind turbine generator set, and its health status directly impacts the normal operation of the entire unit. Currently, the primary means of monitoring the tower 10 are by installing a tilt sensor 1 and a gyroscope. The tilt sensor 1 measures the tilt angle of the tower 10, while the gyroscope measures the angular velocity in the tilt direction. This data is processed by the main control system 3 and, combined with the structural and dimensional characteristics of the tower 10, assesses whether there are any potential safety hazards.

[0028] However, gyroscopes are expensive and increase the risks and maintenance costs of wind turbine generator set management. Therefore, to overcome the above-mentioned drawbacks, this application also provides a wind turbine generator set. To facilitate understanding of the technical solution of this application, the wind turbine generator set in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0029] Please refer to the following: Figure 1 and Figure 2 , Figure 2 A topology diagram of the monitoring system 20 in an embodiment of this application is shown.

[0030] This application provides a wind turbine generator set, including a tower 10 and a monitoring system 20 installed on the tower 10. The monitoring system 20 includes a tilt sensor 1, an auxiliary control system 2, and a main control system 3. The tilt sensor 1 is installed on the tower 10 and is used to collect the tilt angle data of the tower 10. The auxiliary control system 2 is communicatively connected to the tilt sensor 1 and is used to process the tilt angle data and reset the tilt sensor 1. The main control system 3 is connected to the auxiliary control system 2 and a terminal.

[0031] The wind turbine generator set provided in this application includes a tower 10 and a monitoring system 20 installed on the tower 10. The monitoring system 20 includes a tilt sensor 1, an auxiliary control system 2, and a main control system 3. Compared with directly connecting the tilt sensor 1 to the main control system 3, by additionally setting the auxiliary control system 2, the gyroscope can be omitted, and the auxiliary control system 2 can be used to compensate for the data accuracy. The auxiliary control system 2 can reliably process and zero the data, thereby achieving reliable detection of the tower 10 while reducing costs.

[0032] Understandably, by employing a dual control system, the work originally belonging to the main control system 3 can be divided into two parts: a big data decision-making part and a real-time control part. The big data decision-making part uses the high-performance auxiliary control system 2 to fuse and process various data to generate control strategies. The real-time control part still uses the main control system 3, with the auxiliary control system 2 driving the main control system 3 to execute control actions, thereby improving the reliability of the wind turbine generator.

[0033] The main control system 3 is used for the control of the wind turbine generator itself. As an optional implementation, the main control system 3 may include a PLC control system. The main functions of the main control system 3 include controlling the yaw system to adjust to the wind, controlling the pitch system to control the generator speed, and controlling the switching system to start and stop the wind turbine generator.

[0034] The auxiliary control system 2 is a functional extension of the main control system 3. The auxiliary control system 2 may include an industrial control computer, characterized by strong computing power and strong functional expansion capabilities. Its main functions include flexible access to tilt sensors 1, etc., as well as the processing and fusion of the collected tilt data. In wind turbine generator sets, in addition to accessing tilt data, it can prioritize accessing sensor data with large data volume that the main control system 3 itself cannot process, further relieving the pressure on the main control system 3 and allowing the main control system 3 to better complete the real-time control function.

[0035] In some optional embodiments, the auxiliary control system 2 is also configured to generate control strategies based on various diagnostic models according to the aforementioned data, and transmit the control strategies to the main control system 3 to generate control actions. Furthermore, the auxiliary control system 2 can also be configured to communicate with the field-level server 6 to report non-real-time tasks such as the operating status of existing wind turbine generators, further relieving the pressure on the main control system 3.

[0036] Compared to setting only the main control system 3, this application adopts a dual control system to decouple data processing from real-time control. It can combine the data processing capabilities of the auxiliary control system 2 with the real-time processing performance of the main control system 3, making the entire data processing more efficient and reasonable. This compensates for the data processing accuracy lost due to the omission of the gyroscope, and achieves reliable monitoring of the wind turbine generator while reducing costs.

[0037] It should be noted that, taking the auxiliary control system 2 as an industrial control computer as an example, an industrial control computer is a device that uses digital electronic technology to automatically execute arbitrary arithmetic or logical operations serially according to a series of instructions. An industrial control computer can realize functions such as data acquisition, data processing, data storage, and data transmission, and can also provide human-machine interface and network communication functions. Therefore, by adding the auxiliary control system 2, the data acquisition and processing functions of the auxiliary control system 2 itself can be used to realize the acquisition and processing of tilt angle data, thereby compensating for the reduced data accuracy due to the omission of the gyroscope, and achieving real-time monitoring of the wind turbine generator at low cost.

[0038] Please see Figure 1 and Figure 2 To further improve monitoring reliability, in some optional embodiments, the number of tilt sensors 1 is two or more, and the two or more tilt sensors 1 are arranged at intervals along the height direction Z of the tower 10, and each tilt sensor 1 is connected to the auxiliary control system 2.

[0039] By setting up two or more tilt sensors 1, multiple positions along the height direction Z of the tower 10 can be detected, improving monitoring efficiency. Multiple tilt sensors 1 are connected to an auxiliary control system 2, which acquires and processes data from the multiple tilt sensors 1, then transmits it to the main control system 3 for analysis and display to determine the operating status of the wind turbine generator.

[0040] Optionally, the tilt sensor 1 can be configured as a dual-axis sensor, such as a MEMS tilt sensor 1. The MEMS tilt sensor 1 uses an accelerometer inside the microelectromechanical system to measure the projected components of gravitational acceleration on the X and Y axes to determine the X-axis angle and Y-axis angle, and then determine the tilt angle of the tower's preset position relative to the plane. It has the advantages of compact structure and low cost, and can provide real-time tilt angle readings with a fast response speed.

[0041] In some alternative embodiments, each tilt sensor 1 is located on the same line, and the direction of the line is parallel to the generatrix direction of the cylinder wall of the tower 10, which can make the relative value of the tilt measurement larger and the measurement more accurate.

[0042] The generatrix direction of the cylinder wall refers to the side edge line of the tower, meaning that the positions of each tilt sensor 1 in the height direction Z need to be consistent. When the tower 10 is cylindrical, the generatrix direction of the cylinder wall is parallel to the height direction Z, meaning the line connecting each tilt sensor 1 is a vertical straight line. When the tower 10 is a truncated cone, the generatrix direction of the cylinder wall is the waist of the right trapezoid at each position on the side of the truncated cone.

[0043] Understandably, during installation, ladders, cable trays, or other reference positioning methods can be used to ensure that the connection direction of each tilt sensor 1 is parallel to the generatrix direction of the tower wall 10, thereby improving the monitoring effect.

[0044] Optionally, the tilt sensor 1 can be set on the prevailing wind side of the tower 10. That is, when installing the tilt sensor 1, the prevailing wind direction of the area where the wind turbine is located can be observed first, that is, the direction in which the tower 10 may be bent the most can be counted. Then the tilt sensor 1 can be installed on the prevailing wind side of the tower 10, thereby improving the monitoring effect and response speed, and further improving the monitoring efficiency of the wind turbine.

[0045] In some alternative embodiments, the tilt sensor 1 is horizontally mounted on the cylinder wall of the tower 10, for example, by means of a dedicated compass, level and / or spirit level.

[0046] To improve the monitoring effect of the tilt sensor 1, the tilt sensor 1 can be kept horizontal during installation. Specifically, during installation, the installation position of the tower 10 cylinder wall can be ground flat first, and then the cylinder wall mounting surface and the mounting surface of the tilt sensor 1 can be wiped clean with a cleaning cloth. Then, the accelerator and glue can be applied to the mounting surface of the tilt sensor 1 in sequence, and then the tilt sensor 1 can be pressed and fixed to the cylinder wall of the tower 10 to ensure a firm installation.

[0047] In some alternative embodiments, the tilt sensors 1 are arranged in pairs at both ends of the tower 10 along the height direction Z. The two ends of the tower 10 refer to the top and bottom of the tower. That is, the number of tilt sensors 1 can be set to two, and the two tilt sensors 1 can be respectively arranged at the top and bottom of the tower.

[0048] The tilt sensor 1 located at the top of the tower is mainly used to monitor the sway of the tower 10, while the tilt sensor 1 located at the bottom of the tower is mainly used to monitor the non-uniform settlement of the foundation platform 50. By setting the number of tilt sensors 1 to two and placing them at opposite ends of the tower 10, the number of tilt sensors 1 can be reduced while maintaining monitoring reliability, thus improving monitoring efficiency. Furthermore, by arranging the tilt sensors 1 in pairs along the height direction Z at both ends of the tower 10, the distance between the tilt sensors 1 can be maximized, resulting in more accurate measurement results and improved monitoring effectiveness.

[0049] For ease of description, the tilt sensor 1 installed at the top of the tower is defined as tower top sensor 11, and the tilt sensor 1 installed at the bottom of the tower is defined as tower bottom sensor 12.

[0050] It is understandable that the top and bottom of the tower do not refer to the end faces of the top and bottom of the tower, but rather to the positions along the height direction Z at a preset distance from the end faces of the top and bottom of the tower. The specific positions and preset distances can be adjusted according to the difficulty of installation to make it easier for operators to install.

[0051] As an optional implementation, the tower top sensor 11 can be installed on the yaw platform of the yaw system. Specifically, it can be installed below the top of the yaw platform, approximately 0.5m above the top of the yaw platform along the Z-direction in the height direction. This facilitates installation by the operator and allows for monitoring of the maximum sway of the tower 10, improving monitoring accuracy. Similarly, the tower bottom sensor 12 can be installed at a distance from the tower base. Specifically, it can be installed above the flange face of the tower base along the Z-direction in the height direction, approximately 0.5m above the flange face of the yaw platform along the Z-direction in the height direction. This also facilitates installation by the operator.

[0052] To facilitate understanding of the technical solution of this application, the structure of the monitoring system 20 will be described below using the tilt sensor 1, which includes a pair of sensors arranged at the top of the tower and a sensor at the bottom of the tower, as an example.

[0053] Please see Figure 1 and Figure 2 In order to facilitate data transmission between the tilt sensor 1 and the auxiliary control system 2, and between the auxiliary control system 2 and the main control system 3, in some optional embodiments, the monitoring system 20 further includes a serial-to-network module 4 and a switch 5. The switches 5 are arranged in pairs at both ends of the tower 10 along the height direction Z. The tilt sensor 1 is connected to the serial-to-network module 4, and the serial-to-network module 4 is connected to the auxiliary control system 2 through the switches 5.

[0054] As an optional implementation, taking the auxiliary control system 2 located in the nacelle 30 as an example, the paired switches 5 may include a tower top switch 51 and a tower bottom switch 52. The tower top sensor 11 can be directly connected to the auxiliary control system 2 located in the nacelle 30 via a network cable. The tower bottom sensor 12 can be connected to the serial-to-network module 4. The serial-to-network module 4 is used to convert the tilt angle data measured by the tilt angle sensor 1 into a network signal, and then connect to the ring network of the wind turbine generator. Communication between the tower top and the tower bottom is realized through the tower top switch 51 and the tower bottom switch 52, so that the tilt angle data of the tower bottom sensor 12 can be transmitted to the auxiliary control system 2 through the switch 5. Then, the auxiliary control system 2 realizes the data processing of the tower top sensor 11 and the tower bottom sensor 12, and realizes the real-time monitoring of the tower 10.

[0055] Optionally, the main control system 3 can be located at the bottom of the tower. The main control system 3 communicates with the auxiliary control system 2 via the switch 5 to realize data transmission from the auxiliary control system 2 to the main control system 3. In addition, the monitoring system 20 may also include a field-level server 6 located at the bottom of the tower. The field-level server 6 communicates with the auxiliary control system 2 via the switch 5 and is used to store permanent data.

[0056] For auxiliary control system 2, it needs to have data acquisition and data processing functions. Therefore, auxiliary control system 2 includes a data acquisition module and a data processing module. The data acquisition module is used to acquire tilt angle data, and the data processing module is connected to the data acquisition module and is used to process the tilt angle data.

[0057] In some optional embodiments, the auxiliary control system 2 further includes a zeroing module, and the data processing module is further configured to verify a set of tilt angle data and obtain a statistical deviation value. The zeroing module is used to zero the tilt angle sensor 1 according to the statistical deviation value.

[0058] Since the tilt sensor 1 is a very sensitive device, its true value will be affected by the installation angle and installation position. Therefore, by integrating a zeroing module into the auxiliary control system 2, the tilt sensor 1 can be zeroed after installation. The zeroing module is used to calibrate the deviation value caused by the installation of the tilt sensor 1 before real-time monitoring. That is, the true tilt angle of the tower 10 is the measured value minus the deviation value. The deviation value can be regarded as the reading of the tilt sensor 1 when the tower 10 is stationary.

[0059] In actual zeroing, the operation can be carried out when the wind turbine is shut down and the wind speed is low, so as to reduce the impact of wind speed and wind turbine rotation on the consistency of zeroing, and reduce the existence of data shock through physical means.

[0060] As an optional implementation, zeroing the tilt sensor 1 includes: a data acquisition step, a data processing step, and a zeroing step.

[0061] In the data acquisition step, a set of tilt angle data needs to be collected. The length of the data acquisition can be designed according to the actual vibration characteristic frequency range of the wind turbine generator. The length of the data acquisition should include at least one tower 10 motion cycle. In order to reduce the number of zeroing, the specific data acquisition length can include at least two complete motion cycles. In practice, 10 seconds of data can be collected and used for zeroing.

[0062] The data processing steps mainly include handling abnormal data, such as data jumps and data waveform asymmetry. For data jumps, a threshold can be set to discard peak-to-peak data exceeding the threshold, thus reducing the impact of data jumps on the zeroing effect. For data waveform asymmetry, data processing models, such as using a Hamming window, can be used to weaken the boundaries of the sampled data, thereby reducing edge effects and sideband influence, and ultimately reducing the impact of data waveform asymmetry on the zeroing effect.

[0063] In the zeroing step, by using statistical data instead of real-time values ​​as the standard for zeroing in the data acquisition step, and by processing the statistical data in the data processing step to obtain the statistical deviation value, which is the average value of 10 seconds of data, the zeroing module can use the statistical deviation value as the standard to zero the tilt sensor 1, thereby improving the reliability of zeroing.

[0064] Understandably, during the zeroing process, the X-axis and Y-axis angles of the tilt sensor 1 can be zeroed simultaneously, reducing the number of zeroing operations and decreasing the workload for operators.

[0065] In some optional embodiments, the auxiliary control system 2 further includes a comparison module, which is connected to the data processing module and is used to compare the statistical deviation value of another set of tilt angle data with a preset threshold after the zeroing module zeroes the tilt angle sensor 1. The comparison module includes at least one of a comparator and a logic circuit.

[0066] By setting up a comparison module, after zeroing the tilt sensor 1 using the zeroing module, another set of tilt data can be acquired, such as 10 seconds of tilt data. The comparison module then compares the statistical deviation value obtained from this set of tilt data with a preset threshold. If the statistical deviation value is within the preset threshold range, zeroing is considered successful. If the statistical deviation value is outside the preset threshold range, zeroing needs to continue until the statistical deviation value of the zeroed tilt data reaches the preset threshold range.

[0067] Understandably, by setting up a comparison module, a verification process can be added to achieve closed-loop zeroing. Zeroing is only stopped after an acceptable effect is achieved, thereby improving the reliability of zeroing, minimizing the installation deviation of the tilt sensor 1, and achieving reliable monitoring of the tower 10 while reducing costs.

[0068] In some alternative embodiments, for the comparison module, the preset threshold of the top sensor 11 is greater than the preset threshold of the bottom sensor 12.

[0069] Optionally, the preset threshold of the tower top sensor 11 can be set to 0.03 degrees, and the preset threshold of the tower bottom sensor 12 can be set to 0.01 degrees.

[0070] For wind turbine generator sets, since the swaying at the top of the tower is more severe than that at the bottom of the tower, the preset threshold of the top sensor 11 is made greater than the preset threshold of the bottom sensor 12, so that the zeroing accuracy of the top and bottom positions is different. This allows different standards to be used for the top sensor 11 and the bottom sensor 12, so as to ensure different zeroing accuracy requirements under different application scenarios and improve the reliability of zeroing.

[0071] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A wind turbine generator set, characterized in that, Includes a tower (10) and a monitoring system (20), the monitoring system (20) comprising: An inclination sensor (1) is installed on the tower (10) to detect the inclination data of the tower (10); An auxiliary control system (2) is connected to the tilt sensor (1). The auxiliary control system (2) is used to collect the tilt data and process the tilt data. The main control system (3) is connected to the auxiliary control system (2) and the terminal.

2. The wind turbine generator set according to claim 1, characterized in that, The number of tilt sensors (1) is two or more, and the two or more tilt sensors (1) are arranged at intervals along the height direction (Z) of the tower (10). Each tilt sensor (1) is connected to the auxiliary control system (2).

3. The wind turbine generator set according to claim 2, characterized in that, Each of the tilt sensors (1) is located on the same line, and the direction of the line is parallel to the generatrix direction of the cylinder wall of the tower (10).

4. The wind turbine generator set according to claim 2, characterized in that, The tilt sensor (1) is horizontally mounted on the cylinder wall of the tower (10).

5. The wind turbine generator set according to claim 2, characterized in that, The tilt sensors (1) are arranged in pairs at both ends of the tower (10) along the height direction (Z).

6. The wind turbine generator set according to any one of claims 1 to 5, characterized in that, The monitoring system (20) also includes a serial-to-network module (4) and a switch (5). The switch (5) is arranged in pairs at both ends of the tower (10) along the height direction (Z). The tilt sensor (1) is connected to the serial-to-network module (4). The serial-to-network module (4) is connected to the auxiliary control system (2) through the switch (5).

7. The wind turbine generator set according to any one of claims 1 to 5, characterized in that, The main control system (3) includes a PLC control system, and the auxiliary control system (2) includes an industrial computer.

8. The wind turbine generator set according to any one of claims 1 to 5, characterized in that, The auxiliary control system (2) includes a data acquisition module and a data processing module. The data acquisition module is used to acquire the tilt angle data, and the data processing module is connected to the data acquisition module and is used to process the tilt angle data.

9. The wind turbine generator set according to claim 8, characterized in that, The auxiliary control system (2) also includes a zeroing module. The data processing module is further configured to verify a set of tilt angle data and obtain a statistical deviation value. The zeroing module is used to zero the tilt angle sensor (1) according to the statistical deviation value.

10. The wind turbine generator set according to claim 9, characterized in that, The auxiliary control system (2) further includes a comparison module, which is connected to the data processing module and is used to compare the relationship between another set of statistical deviation values ​​and a preset threshold after the zeroing module zeros the tilt sensor (1). The comparison module includes at least one of a comparator and a logic circuit.

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