System and device for monitoring variable pitch communication fault of wind turbine generator

Abstract

The invention discloses a wind turbine generator variable pitch communication fault monitoring system and device, and relates to the technical field of monitoring systems.The wind turbine generator variable pitch communication fault monitoring system comprises an on-site monitoring system which comprises a wind turbine generator variable pitch control unit, an on-site monitoring module, a data acquisition module and a communication module and is used for acquiring, processing and transmitting monitoring data of a unit in real time; and the central monitoring system comprises a data receiving module, a data storage library, a state judgment module and a fault signal sending module, and is used for receiving, storing and analyzing data and early warning faults. According to the method, equipment damage and casualty risks caused by fault upgrading are avoided, powerful support is provided for safe and stable operation of the wind generating set, and the shutdown risk and the maintenance difficulty are remarkably reduced.

Description

Technical Field

[0001] The invention relates to the technical field of monitoring systems, and in particular to a wind turbine pitch-changing communication fault monitoring system and a device thereof. Background Art

[0002] Since the 21st century, in the global energy structure adjustment, the share of fossil fuels has declined significantly, while the proportion of wind energy, hydropower and solar energy has continued to rise. In recent years, the proportion of renewable energy represented by wind energy and solar energy in the total energy has increased day by day, and renewable energy technology has developed rapidly. They are generally clean, pollution-free, safe, and have abundant reserves. Wind power generation is the most promising renewable energy at this stage.

[0003] As one of the core control systems of wind turbines, the stability and reliability of the wind turbine pitch system are of great significance to the reliability and safety of wind turbines. Pitch communication failure will not only affect the normal operation of the wind turbine and reduce the power generation efficiency, but may also cause further damage to the equipment and even cause safety accidents. At present, the traditional wind turbine fault monitoring method mainly relies on manual inspection and regular maintenance, which is not only inefficient, but also difficult to detect and deal with potential faults in time. Therefore, a wind turbine pitch communication fault monitoring system and device are proposed. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above existing problems, the present invention is proposed.

[0006] Therefore, the present invention provides a wind turbine pitch communication fault monitoring system and device, which can solve the problems mentioned in the background technology.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] In a first aspect, the present invention provides a wind turbine pitch communication fault monitoring system, which includes: a field monitoring system including a wind turbine pitch control unit, a field monitoring module, a data acquisition module and a communication module, which are used to collect, process and transmit monitoring data of the unit in real time;

[0009] The central monitoring system includes a data receiving module, a data storage library, a status judgment module and a fault signal sending module, which are used for data reception, storage, analysis and fault warning.

[0010] As a preferred solution of the wind turbine pitch communication fault monitoring system of the present invention, the wind turbine pitch control unit is used to control the pitch of each wind turbine, including parameter monitoring, automatic power generation control and equipment protection functions of the unit, and uses infrared communication link as the signal transmission method;

[0011] The on-site monitoring module is used to connect to the wind turbine generator control unit and is responsible for the overall operation monitoring of the system, including time synchronization operation, system self-checking and data collection;

[0012] The data acquisition module is used to be set in the field control system to collect the working status data, communication signal data, error code data and environmental parameter data of the unit in real time, and perform preliminary data processing;

[0013] The communication module is used to transmit the data collected by the data collection module to the central monitoring system in a wired or wireless manner.

[0014] As a preferred solution of the wind turbine pitch communication fault monitoring system of the present invention, wherein: the data receiving module is used to receive the unit operation data transmitted from the communication module in a wired or wireless manner;

[0015] The data storage library is used to connect with the data receiving module, and is used to store the received unit operation data, and store historical data and historical fault data as a basis for subsequent analysis and judgment;

[0016] The state judgment module is used to connect with the data storage library, analyze the stored data in real time, use big data analysis and machine learning algorithms, predict and diagnose faults based on historical data and real-time data, and judge whether the unit has a fault or abnormal state;

[0017] The fault signal sending module is used to connect with the state judgment module, and is used to automatically trigger a fault warning signal when a fault is detected, and send the fault information to relevant personnel and equipment.

[0018] As a preferred solution of the wind turbine pitch communication fault monitoring system of the present invention, the communication module and the data receiving module adopt a star network topology communication link to realize the remote monitoring, control, fault warning and safety protection functions of the unit.

[0019] As a preferred solution of the wind turbine pitch communication fault monitoring system of the present invention, the on-site monitoring system also includes a backup emergency safety chain module, which monitors the wind turbine generator set and immediately triggers an emergency shutdown command when an abnormal fault that may cause fatal damage to the wind turbine is detected, including:

[0020] Set the trigger threshold parameter range value. When the backup critical safety chain module detects that the parameters of the wind turbine generator are within the trigger threshold parameter range value, the emergency stop command is triggered to control the wind turbine generator set to stop working and the unit is disconnected from the grid;

[0021] The time synchronization operation in the field monitoring module adopts the network time protocol or the precision time protocol to ensure that the time error between modules is within an acceptable range.

[0022] As a preferred solution of the wind turbine pitch communication fault monitoring system of the present invention, the central monitoring system also includes a network redundancy and backup module;

[0023] The network redundancy is used to ensure the reliability of the communication link between the central monitoring system and the field monitoring system;

[0024] The backup module is used to automatically switch to the backup communication link when a main communication link fails;

[0025] The system self-check in the field monitoring module includes hardware self-check, software self-check and communication self-check;

[0026] The hardware self-check includes checking the status of sensors, actuators and communication devices;

[0027] The software self-check includes checking the integrity of the system software, the correctness of the configuration and the stability of the program operation;

[0028] The communication self-check includes a comprehensive test of the communication link, and tests the communication stability between the data acquisition module and the wind turbine generator control unit, the unit pitch controller, and each unit pitch driver.

[0029] As a preferred solution of the wind turbine pitch communication fault monitoring system described in the present invention, when the status judgment module judges the real-time data, if a fault is judged, the data status of the real-time data and the related data in the previous 1 minute is compared with the historical fault data according to the time when the data was generated to analyze the cause of the fault, and finally the cause of the fault is sent through the fault signal sending module.

[0030] In a second aspect, the present invention provides a wind turbine pitch communication fault monitoring device, which includes: an infrared sensor, an infrared receiver, an Ethernet switch, and a safety sensor and a safety relay for implementing a backup critical safety chain module;

[0031] The safety sensor monitors the key parameters of the wind turbine generator set in real time;

[0032] The infrared sensor and the infrared receiver form an infrared communication link, and the Ethernet switch forms a star network topology communication link;

[0033] The key parameters include vibration, temperature, rotation speed and wind speed;

[0034] When an abnormal fault is detected, the action is triggered immediately to disconnect the safety relay, and the wind turbine generator set will immediately execute the emergency shutdown procedure;

[0035] The emergency shutdown procedure includes cutting off power, shutting down the blade pitch system and disconnecting the unit from the grid.

[0036] In a third aspect, the present invention provides a computer device, including a memory and a processor, wherein the memory stores a computer program, wherein: when the processor executes the computer program, the steps of the wind turbine pitch communication fault monitoring system are implemented.

[0037] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein: when the computer program is executed by a processor, the steps of a wind turbine pitch communication fault monitoring system are implemented.

[0038] Compared with the prior art, the beneficial effect of the present invention is that through the close linkage between the on-site monitoring system and the central monitoring system, real-time monitoring and fault prediction of the wind turbine pitch control are realized. Combined with big data analysis and machine learning algorithms, it not only significantly improves the efficiency and accuracy of fault detection, but also can trigger early warning signals in time, shorten the fault response time, and effectively avoid the reduction of power generation efficiency and equipment damage. At the same time, the system adopts an infrared communication link, so that it can achieve stable monitoring and control even in a low temperature environment, greatly improving the reliability and stability of communication, and ensuring the efficiency of data transmission. In addition, the backup critical safety chain module can automatically trigger an emergency shutdown when an abnormal fault is detected, avoiding equipment damage and casualties caused by fault escalation. The invention provides strong support for the safe and stable operation of wind turbines, significantly reducing the risk of shutdown and maintenance difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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 creative work.

[0040] Figure 1 A monitoring system diagram of a wind turbine pitch control communication fault monitoring system and device provided by an embodiment of the present invention;

[0041] Figure 2 An internal structural diagram of a computer device of a wind turbine pitch communication fault monitoring system and device provided by an embodiment of the present invention;

[0042] Figure 3 A system device diagram of a wind turbine pitch communication fault monitoring system and device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0043] In order to make the above-mentioned purposes, features and advantages of the present invention more understandable, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0044] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0045] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0046] Example 1

[0047] Reference Figure 1-Figure 2 , which is the first embodiment of the present invention, and provides a wind turbine pitch communication fault monitoring system, comprising:

[0048] The present application provides a method for effectively solving the above-mentioned problems. Next, multiple embodiments will be combined to explain in detail how to implement the wind turbine pitch communication fault monitoring system.

[0049] Figure 1 A method flow chart of a wind turbine pitch communication fault monitoring system and device is shown, including:

[0050] The on-site monitoring system includes a wind turbine pitch control unit, an on-site monitoring module, a data acquisition module, and a communication module, which are used to collect, process, and transmit the monitoring data of the wind turbine in real time;

[0051] The central monitoring system includes a data receiving module, a data storage library, a status judgment module and a fault signal sending module, which are used for data reception, storage, analysis and fault warning.

[0052] Furthermore, the wind turbine pitch control unit is used to control the pitch of each wind turbine, including parameter monitoring, automatic power generation control and equipment protection functions of the unit, and uses an infrared communication link as a signal transmission method;

[0053] The field monitoring module is used to connect with the wind turbine control unit and is responsible for the overall operation monitoring of the system, including time synchronization, system self-checking and data collection;

[0054] The data acquisition module is used to be set in the field control system to collect the working status data, communication signal data, error code data and environmental parameter data of the unit in real time, and perform preliminary data processing;

[0055] The communication module is used to transmit the data collected by the data acquisition module to the central monitoring system in a wired or wireless manner.

[0056] Furthermore, the data receiving module is used to receive the unit operation data transmitted from the communication module in a wired or wireless manner;

[0057] The data storage library is used to connect with the data receiving module to store the received unit operation data, and store historical data and historical fault data as the basis for subsequent analysis and judgment;

[0058] The status judgment module is used to connect with the data storage library to analyze the stored data in real time, and adopt big data analysis and machine learning algorithms to predict and diagnose faults based on historical data and real-time data to determine whether the unit has faults or abnormal conditions;

[0059] The fault signal sending module is used to connect with the state judgment module to automatically trigger a fault warning signal when a fault is detected, and send the fault information to relevant personnel and equipment.

[0060] Furthermore, the communication module and the data receiving module adopt a star network topology communication link to realize the remote monitoring, control, fault warning and safety protection functions of the unit.

[0061] Furthermore, the on-site monitoring system also includes a backup emergency safety chain module, which monitors the wind turbine generator set and immediately triggers an emergency shutdown command when an abnormal fault that may cause fatal damage to the wind turbine generator is detected, including:

[0062] Set the trigger threshold parameter range value. When the backup critical safety chain module detects that the parameters of the wind turbine generator are within the trigger threshold parameter range value, the emergency stop command is triggered to control the wind turbine generator set to stop working and the unit is disconnected from the grid;

[0063] The time synchronization operation in the field monitoring module adopts the network time protocol or the precision time protocol to ensure that the time error between modules is within an acceptable range.

[0064] Furthermore, the central monitoring system also includes network redundancy and backup modules;

[0065] Network redundancy is used to ensure the reliability of the communication link between the central monitoring system and the field monitoring system;

[0066] The backup module is used to automatically switch to the backup communication link when the main communication link fails;

[0067] The system self-check in the field monitoring module includes hardware self-check, software self-check and communication self-check;

[0068] Hardware self-tests include checking the status of sensors, actuators, and communication devices;

[0069] Software self-check includes checking the integrity of system software, correctness of configuration and stability of program operation;

[0070] The communication self-test includes a comprehensive test of the communication link, testing the communication stability between the data acquisition module and the wind turbine control unit, the unit pitch controller and each unit pitch drive.

[0071] Furthermore, when the status judgment module judges the real-time data, if a fault is determined, the data status of the real-time data and the related data in the previous 1 minute is compared with the historical fault data according to the time when the data was generated to analyze the cause of the fault, and finally the cause of the fault is sent through the fault signal sending module.

[0072] Furthermore, the present embodiment also provides a wind turbine pitch communication fault monitoring device, comprising: an infrared sensor, an infrared receiver, an Ethernet switch, and a safety sensor and a safety relay for implementing a backup critical safety chain module;

[0073] Safety sensors monitor key parameters of wind turbines in real time;

[0074] The infrared sensor and the infrared receiver form an infrared communication link, and the Ethernet switch forms a star network topology communication link;

[0075] Key parameters include vibration, temperature, rotation speed and wind speed;

[0076] When an abnormal fault is detected, the action is triggered immediately to disconnect the safety relay, and the wind turbine generator set will immediately execute the emergency shutdown procedure;

[0077] The emergency shutdown procedure includes cutting off power, shutting down the blade pitch system and disconnecting the unit from the grid.

[0078] This embodiment also provides a computer device, which may be a terminal, and its internal structure diagram may be as shown in FIG. Figure 2 As shown. The computer device includes a processor, a memory, a communication interface, a display screen and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, an operator network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a comprehensive evaluation method suitable for orderly access of large-scale distributed power sources is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covered on the display screen, or a key, trackball or touchpad set on the computer device housing, or an external keyboard, touchpad or mouse.

[0079] Example 2

[0080] Reference Figure 1 - Figure 2 , which is the second embodiment of the present invention, and this embodiment provides a wind turbine pitch communication fault monitoring system. In order to verify the beneficial effects of the present invention, scientific demonstration is carried out through economic benefit calculation and simulation experiments.

[0081] This embodiment verifies the stability of the wind turbine pitch communication fault monitoring system under different operating conditions, the accuracy of fault diagnosis and the effectiveness of emergency treatment. The test was carried out in a wind farm, and 6 wind turbines with different operating years were selected, among which the parameters of the pitch control systems of the units were different. Each unit is connected to the on-site monitoring system, and the central monitoring system is set up in the control center, which is responsible for receiving and analyzing data and sending fault signals. The test conditions cover normal operating conditions, extreme temperature conditions (-20℃ to 40℃) and communication link abnormalities, etc., to fully verify the applicability of the system in complex environments.

[0082] First, the communication connection between the on-site monitoring system and the central monitoring system is completed, and the network time protocol (NTP) is used to ensure the time synchronization of each module. Then the system self-test is started, including hardware self-test, software self-test and communication link self-test, to confirm that the status of sensors, actuators and communication equipment is normal.

[0083] During the test, the data acquisition module collects unit operating status data (such as speed, power output, ambient temperature, pitch angle), communication signal data (signal strength, link delay), error code data (such as motor overload, pitch offset abnormality) and environmental parameter data (temperature, humidity, etc.) every minute. After data acquisition, it is transmitted to the central monitoring system through a star network topology.

[0084] To verify the effectiveness of the fault diagnosis module, the test set up three common fault scenarios: communication interruption, motor overload, and abnormal pitch angle under low temperature. The state judgment module analyzes the real-time data based on historical data and big data analysis, and records the fault precursor data within 1 minute when judging the fault state. The machine learning algorithm performs multi-dimensional analysis on the data, identifies the fault type and cause, and triggers the fault signal sending module to send an early warning signal to relevant personnel.

[0085] When simulating abnormal faults (such as communication link disconnection or pitch change abnormality), the backup critical safety chain module immediately triggers an emergency shutdown after detecting that the parameters exceed the set threshold range to ensure the safe disconnection of the unit from the grid.

[0086] The test lasted for 48 hours in total, and the data of each unit was stored in the database module of the central monitoring system for subsequent analysis.

[0087] Table 1 Test data record table

[0088] Parameter name Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Speed ​​(rpm) 1500 1480 1475 1490 1505 1485 Output power (kW) 800 790 780 805 810 795 Ambient temperature (℃) -5 -10 15 20 35 -8 Signal strength (dBm) -70 -68 -72 -75 -65 -69 Error Code 0 1 (overload) 0 2 (Offset) 0 1 (overload) Pitch angle (°) 15 14 13 14 15 16 Link delay (ms) 15 20 25 22 18 19

[0089] Through comparative analysis of the test data, it can be seen that the wind turbine pitch communication fault monitoring system of the present invention has strong stability and fault prediction capabilities in environments with extreme temperatures and abnormal communication links.

[0090] Under low temperature conditions (such as the ambient temperature of unit 2 and unit 6 is -10℃ and -8℃), the system achieves effective signal transmission through the infrared communication link, and the link delay is maintained at about 20ms, showing the stability of communication under extreme temperature conditions. Traditional communication methods are usually affected by increased delay or data loss in low temperature environments, while the system of the present invention significantly reduces the delay problem of the communication link caused by temperature fluctuations through the infrared link.

[0091] When the system failed in unit 2 (error code showed overload) and unit 4 (pitch deviation abnormality), the status judgment module successfully identified the fault and accurately determined the fault type through historical data comparison, and triggered the early warning signal sending function. Compared with the traditional manual inspection method, the system realizes real-time monitoring and accurate prediction based on historical data, greatly improving the accuracy and efficiency of fault diagnosis and avoiding further expansion of faults.

[0092] When simulating abnormal fault scenarios, the backup emergency safety chain module was highly sensitive and could trigger the shutdown command in time after detecting that the parameter abnormality entered the preset threshold range, effectively ensuring the safe operation of the unit. Traditional systems rely on manual operation to trigger shutdown, while the automatic response mechanism of this system significantly shortens the emergency processing time and further reduces the equipment loss and maintenance costs caused by fault escalation.

[0093] In summary, through data analysis, it can be seen that the present invention has significant advantages in communication stability, fault diagnosis and emergency handling. In particular, its performance in harsh environments shows the innovation and practicality of the system design. Compared with the existing technology, the present invention effectively fills the shortcomings of communication link stability and automated fault handling in low-temperature environments, and provides strong technical support for remote management and efficient maintenance of wind turbines.

[0094] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

[0095] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of complete hardware embodiments, complete software embodiments, or embodiments in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code. The scheme in the embodiments of the present application can be implemented in various computer languages, for example, object-oriented programming language Java and literal scripting language JavaScript, etc.

[0096] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0097] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0098] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0099] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0100] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A wind turbine pitch control communication fault monitoring system, characterized in that: The on-site monitoring system includes a wind turbine pitch control unit, an on-site monitoring module, a data acquisition module, and a communication module, which are used to collect, process, and transmit the monitoring data of the wind turbine in real time; The central monitoring system includes a data receiving module, a data storage library, a status judgment module and a fault signal sending module, which are used for data reception, storage, analysis and fault warning.

2. The wind turbine pitch communication fault monitoring system according to claim 1, characterized in that: The wind turbine pitch control unit is used to control the pitch of each wind turbine, including parameter monitoring, automatic power generation control and equipment protection functions of the unit, and uses an infrared communication link as a signal transmission method; The on-site monitoring module is used to connect to the wind turbine generator control unit and is responsible for the overall operation monitoring of the system, including time synchronization operation, system self-checking and data collection; The data acquisition module is used to be set in the field control system to collect the working status data, communication signal data, error code data and environmental parameter data of the unit in real time, and perform preliminary data processing; The communication module is used to transmit the data collected by the data collection module to the central monitoring system in a wired or wireless manner.

3. The wind turbine pitch communication fault monitoring system according to claim 2, characterized in that: The data receiving module is used to receive the unit operation data transmitted from the communication module in a wired or wireless manner; The data storage library is used to connect with the data receiving module, and is used to store the received unit operation data, and store historical data and historical fault data as a basis for subsequent analysis and judgment; The state judgment module is used to connect with the data storage library, analyze the stored data in real time, use big data analysis and machine learning algorithms, predict and diagnose faults based on historical data and real-time data, and judge whether the unit has a fault or abnormal state; The fault signal sending module is used to connect with the state judgment module, and is used to automatically trigger a fault warning signal when a fault is detected, and send the fault information to relevant personnel and equipment.

4. The wind turbine pitch communication fault monitoring system according to claim 3, characterized in that: The communication module and the data receiving module adopt a star network topology communication link to realize the remote monitoring, control, fault warning and safety protection functions of the unit.

5. The wind turbine pitch communication fault monitoring system according to claim 4, characterized in that: The on-site monitoring system also includes a backup emergency safety chain module, which monitors the wind turbine generator set. When an abnormal fault that may cause fatal damage to the wind turbine is detected, an emergency shutdown command is immediately triggered, including: Set the trigger threshold parameter range value. When the backup critical safety chain module detects that the parameters of the wind turbine generator are within the trigger threshold parameter range value, the emergency stop command is triggered to control the wind turbine generator set to stop working and the unit is disconnected from the grid; The time synchronization operation in the field monitoring module adopts the network time protocol or the precision time protocol to ensure that the time error between modules is within an acceptable range.

6. The wind turbine pitch communication fault monitoring system according to claim 5, characterized in that: The central monitoring system also includes network redundancy and backup modules; The network redundancy is used to ensure the reliability of the communication link between the central monitoring system and the field monitoring system; The backup module is used to automatically switch to the backup communication link when a main communication link fails; The system self-check in the field monitoring module includes hardware self-check, software self-check and communication self-check; The hardware self-check includes checking the status of sensors, actuators and communication devices; The software self-check includes checking the integrity of the system software, the correctness of the configuration and the stability of the program operation; The communication self-check includes a comprehensive test of the communication link, and tests the communication stability between the data acquisition module and the wind turbine generator control unit, the unit pitch controller, and each unit pitch driver.

7. The wind turbine pitch communication fault monitoring system according to claim 6, characterized in that: When the status judgment module judges the real-time data, if a fault is determined, the status of the real-time data and the related data in the previous 1 minute is compared with the historical fault data according to the time when the data was generated to analyze the cause of the fault, and finally the cause of the fault is sent through the fault signal sending module.

8. A wind turbine pitch communication fault monitoring device, based on the wind turbine pitch communication fault monitoring system according to any one of claims 1 to 7, characterized in that: Includes infrared sensors, infrared receivers, Ethernet switches, and safety sensors and safety relays for implementing backup critical safety chain modules; The safety sensor monitors the key parameters of the wind turbine generator set in real time; The infrared sensor and the infrared receiver form an infrared communication link, and the Ethernet switch forms a star network topology communication link; The key parameters include vibration, temperature, rotation speed and wind speed; When an abnormal fault is detected, the action is triggered immediately to disconnect the safety relay, and the wind turbine generator set will immediately execute the emergency shutdown procedure; The emergency shutdown procedure includes cutting off power, shutting down the blade pitch system and disconnecting the unit from the grid.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the wind turbine pitch communication fault monitoring system according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the wind turbine pitch communication fault monitoring system according to any one of claims 1 to 7 are implemented.

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