A thermal power plant power operation and maintenance system with intelligent fault diagnosis

Abstract

The present invention relates to a fault intelligent diagnosis type power operation and maintenance system for a thermal power plant in the field of digital information transmission, comprising a plurality of power operation and maintenance systems, a twin system, a dispatching center and a communication module running in a thermal power plant, wherein the communication module comprises a signal relay device, and the plurality of power operation and maintenance systems all comprise a data acquisition module, a data processing module and an early warning response module. The twin system calls and executes preset response instructions according to the abnormal state of the power operation and maintenance system, and performs simulated operation in the twin system. When the abnormal state in the twin system disappears, the executed preset instructions are copied to the power operation and maintenance system and executed. When the detection data does not change as expected, the maintenance personnel are directly contacted to enter the site for maintenance, thereby greatly increasing the degree of automation of the power operation and maintenance system, eliminating the need for frequent participation of technical personnel, and easily achieving efficient fault diagnosis and troubleshooting.

Description

Technical Field

[0001] The present invention relates to a fault intelligent diagnosis type power operation and maintenance system for a thermal power plant, and in particular to a fault intelligent diagnosis type power operation and maintenance system for a thermal power plant applied in the field of digital information transmission. Background Art

[0002] With the increasing maturity of automation technology, fault diagnosis technology has emerged in order to better maintain the interaction of complex business systems. With the rapid development of modern control theory, digital signal processing, artificial intelligence and other theories, it has paved the way for solving complex industrial problems. It is driven by technological development and the improvement of product economic benefits that the fault diagnosis system of the power operation and maintenance system has developed rapidly.

[0003] Digital twins make full use of physical models, sensor updates, operation history and other data, integrate multi-disciplinary, multi-physical quantity, multi-scale, and multi-probability simulation processes, complete mapping in virtual space, and thus reflect the entire life cycle of the corresponding physical equipment.

[0004] The invention patent CN201810478484.9 specification discloses a remote fault diagnosis method for a power system measurement and control device. When a fault other than that displayed on the LCD screen occurs in the measurement and control device, a mobile terminal is used to store the QR code on the LCD screen, and the stored QR code is uploaded to the equipment operation and maintenance cloud platform. The equipment operation and maintenance cloud platform notifies the development and debugging end of the pending fault information, and the development and debugging end analyzes and processes the QR code, gives fault diagnosis results and maintenance suggestions, and transmits the results to the equipment operation and maintenance cloud platform for storage. The equipment operation and maintenance cloud platform sends a fault handling completion information to the user, archives the fault information, and generates a fault statistics report, thereby realizing a remote fault diagnosis under the condition of complying with the safety protection regulations of the power monitoring system.

[0005] In the above application, although the operation and maintenance platform is processed with the help of Internet of Things technology, its degree of automation is low, and frequent participation of technical personnel is required. The troubleshooting efficiency is highly correlated with the level of the technical personnel, making it difficult to achieve efficient fault diagnosis and troubleshooting. Summary of the invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that although the processing of the existing power operation and maintenance platform is assisted by the Internet of Things technology, its degree of automation is low, and frequent participation of technical personnel is required. The troubleshooting efficiency is highly correlated with the level of the technical personnel, and it is difficult to achieve efficient fault diagnosis and troubleshooting.

[0007] To solve the above problems, the present invention provides a fault intelligent diagnosis type power operation and maintenance system for thermal power plants, comprising a plurality of power operation and maintenance systems, a twin system, a dispatching center and a communication module running in the thermal power plant, wherein the communication module comprises a signal relay device, and the plurality of power operation and maintenance systems each comprises a data acquisition module, a data processing module and an early warning response module;

[0008] According to the abnormal state, the twin system calls and executes the preset instructions, and performs simulated operation in the twin system. When the detection data in the twin system changes according to the preset standard, the executed preset instructions are copied to the power operation and maintenance system and executed. When the data detected by the power operation and maintenance system returns to normal, the safety level is increased by one. When the safety level does not reach the preset number, the early warning ends. When the safety level reaches the preset number, the power maintenance system has accumulated multiple failures and maintenance personnel are required to enter the site for on-site maintenance. When the maintenance is completed and the power grid returns to normal, the safety level is cleared and the early warning ends. When the detection data does not change as expected, the early warning response module is used to directly contact the maintenance personnel to enter the site for maintenance, so as to prevent accidents and eliminate safety hazards in time. After the maintenance personnel enter the site for maintenance, the safety level is cleared and the early warning ends.

[0009] In the above-mentioned intelligent fault diagnosis type thermal power plant power operation and maintenance system, the automation level of the power operation and maintenance system is greatly increased, and frequent participation of technical personnel is not required, making it easy to achieve efficient fault diagnosis and troubleshooting.

[0010] As a further improvement of the present application, when the power operation and maintenance system needs to perform a system upgrade, the dispatching center selects several power operation and maintenance systems that are electrically connected to itself for a trial upgrade, and transmits the upgraded data to the corresponding power operation and maintenance system via the Internet of Things and the communication module. The power operation and maintenance system transmits the upgraded data to the twin system, and the twin system performs a trial upgrade. During the trial upgrade, the power operation and maintenance system will transmit its own detection data to the twin system for simulated operation. After the operation is correct, the power operation and maintenance system will be upgraded. Before upgrading the power operation and maintenance system, the twin system will be used to perform a trial upgrade to verify the upgrade content, thereby increasing the security of the system upgrade.

[0011] As a further improvement supplement to the present application, the data transmission between the power operation and maintenance system and the twin system is two unidirectional channels. When the twin system is working normally, data interaction is carried out between the power operation and maintenance system and the twin system. When the twin system is upgraded, the power system transmits data to the twin system normally, and the twin system only feeds back to the power operation and maintenance system whether it is in normal working state, so as to avoid Trojans or viruses being artificially implanted in the data packets downloaded from the Internet of Things, and it is not easy to infect the power operation and maintenance system through the twin system, and it is not easy to cause the overall collapse of the power operation and maintenance system.

[0012] As a further improvement and supplement to the present application, when a twin system crashes during a trial upgrade, the system itself is directly reset to the initial version after the most recent upgrade, and the upgrade failure is fed back to the dispatch center. The dispatch center re-prepare the upgrade data package and re-upgrade the system, making it less likely that the system will be unable to be updated due to a system upgrade failure.

[0013] As another improvement of the present application, the dispatching center divides the power operation and maintenance system into green, yellow and red levels from low to high according to the safety level of the power operation and maintenance system and the number of abnormal times in the last three months, so as to facilitate the dispatching center to select a suitable power operation and maintenance system for trial upgrade.

[0014] As another improvement supplement to the present application, when the dispatch center selects the trial upgrade objects, it is necessary to select multiple green-level and red-level power operation and maintenance systems to ensure that there are enough samples to reflect the data of the new system in normal and abnormal operation, thereby increasing the security of the system upgrade data.

[0015] As another improvement of the present application, the twin system signal is connected with a signal relay device, the central device includes a signal relay device body, the signal relay device body includes a base part, a switching groove is bored on the base part, a communication protocol unit is plugged into the switching groove, the communication protocol unit includes a high-flow communication unit and a low-flow communication unit, a connecting line is fixedly connected between the high-flow communication unit and the base part, an energy storage spring is sleeved on the outer side of the connecting line, both ends of the energy storage spring are respectively fixedly connected to the signal relay device body and the communication protocol unit, the bottom plate of the base part and the end close to the high-flow communication unit are respectively fixedly connected with an electromagnetic ring and a magnetic steel ring, a moving contact is fixedly connected to the side wall of the low-flow communication unit, a static contact matching the moving contact is fixedly connected to the side wall of the switching groove, an impact part is fixedly connected to the upper end of the low-flow communication unit, a sealing cover matching itself is fixedly connected to the opening of the switching groove, the sealing cover includes a cover body, a prefabricated groove matching the impact part is bored on the cover body.

[0016] As a further improvement supplement of the present application, the base part and the communication protocol unit both have a magnetically insulating shell, which reduces the impact of the electromagnetic ring operation on the basic electronic components in the base part and the communication protocol unit and increases the safety of the signal relay device.

[0017] As another improvement supplement of the present application, a guide part is fixedly connected to the end of the impact part away from the low-flow communication unit, and a positioning groove matching the guide part is drilled on the cover body, so that irreversible adjustment of the specific part of the communication protocol unit connected to the relay device can be achieved by pressing the guide part, so as to cope with the situation that the twin system is in a trial upgrade state when the signal relay device is replaced.

[0018] As another improvement of the present application, after the power operation and maintenance system executes the preset instructions, the twin system continuously adjusts according to the preset adjustment instructions and detects the data in real time. After the subsequent detection data is normalized, it directly enters the step of whether the level meets the standard. When the subsequent detection data is abnormal, the safety level is accumulated normally, which can effectively prevent the safety level from being easily superimposed, reduce the frequency of maintenance personnel entering the site for maintenance, and increase the continuity of the operation of the power operation and maintenance system.

[0019] In summary, in this application, the twin system calls and executes preset response instructions according to the abnormal state of the power operation and maintenance system, and performs simulated operation within the twin system. When the abnormal state within the twin system disappears, the executed preset instructions are copied to the power operation and maintenance system and executed. When the detection data does not change as expected, the maintenance personnel are directly contacted to enter the site for maintenance, which greatly increases the degree of automation of the power operation and maintenance system, does not require frequent participation of technical personnel, and easily achieves efficient fault diagnosis and troubleshooting.

[0020] When the data detected by the power operation and maintenance system returns to normal, the safety level will be raised by one. When the safety level does not reach the preset number, the warning ends. When the safety level reaches the preset number, the power maintenance system has accumulated multiple failures and maintenance personnel are required to enter the site for on-site maintenance. When the maintenance is completed and the power grid returns to normal, the safety level is cleared and the warning ends. When the detection data does not change as expected, the maintenance personnel are directly contacted to enter the site for maintenance to prevent accidents and eliminate safety hazards in time. After the maintenance personnel enter the site for maintenance, the safety level is cleared and the warning ends, which greatly increases the degree of automation of the power operation and maintenance system. Frequent participation of technical personnel is not required, and efficient fault diagnosis and troubleshooting can be easily achieved.

[0021] At the same time, adjustment instructions are added during the operation of the twin system to effectively prevent the safety levels from being easily overlapped, reduce the frequency of maintenance personnel entering the site for maintenance, eliminate the need for frequent shutdown maintenance, and increase the continuity of the power operation and maintenance system.

[0022] When the power operation and maintenance system needs to be upgraded, a trial upgrade is first performed using the twin system to verify the upgrade content, thereby increasing the security of the system upgrade and preventing Trojans or viruses from being artificially implanted in data packets downloaded from the Internet of Things. This prevents the power operation and maintenance system from being infected through the twin system and causing the entire power operation and maintenance system to collapse. A model relay device dedicated to the twin system is set up to enable the high-traffic communication unit to access the model relay device when the twin system is working normally, thereby enabling large-traffic data interaction. When the twin system enters the trial upgrade state, the signal relay device can only transmit small-traffic data, so that problems existing in the twin system itself are not likely to affect the power operation and maintenance system. After the trial upgrade is completed, the signal relay device is replaced to restore the normal operation of the twin system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a simplified structural diagram of a power operation and maintenance system for a thermal power plant with intelligent fault diagnosis according to a first embodiment of the present application;

[0024] Figure 2 This is an early warning flow chart of a power operation and maintenance system for a thermal power plant with intelligent fault diagnosis according to the first embodiment of the present application;

[0025] Figure 3 This is a schematic diagram of normal data interaction between the power operation and maintenance system and the twin system according to the first embodiment of the present application;

[0026] Figure 4 This is a schematic diagram of the interaction between the twin system and the power operation and maintenance system during system upgrade according to the first embodiment of the present application;

[0027] Figure 5 This is an operation level hierarchical diagram of a fault intelligent diagnosis type thermal power plant power operation and maintenance system according to the first embodiment of the present application;

[0028] Figure 6 This is an exploded diagram of the main structure of the twin system signal relay device of the first embodiment of the present application;

[0029] Figure 7 This is a schematic structural diagram of a twin system signal relay device according to the first embodiment of the present application;

[0030] Figure 8 This is a front cross-sectional view of a twin system signal relay device according to a first embodiment of the present application;

[0031] Fig. 9 This is a schematic diagram of the structure of a communication protocol unit according to the first embodiment of the present application;

[0032] Fig.10 This is an early warning flow chart of a power operation and maintenance system for a thermal power plant with intelligent fault diagnosis according to the second implementation mode of the present application.

[0033] Description of the numbers in the figure:

[0034] 1 signal relay device body, 101 base part, 102 static contact, 2 sealing cover, 201 cover body, 202 prefabricated groove, 3 communication protocol unit, 301 high flow communication unit, 302 low flow communication unit, 303 impact part, 304 guide part, 305 connecting line, 306 moving contact, 4 energy storage spring, 5 electromagnetic ring, 6 magnetic steel ring. DETAILED DESCRIPTION

[0035] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0036] The first implementation method:

[0037] Figure 1 A fault intelligent diagnosis type power operation and maintenance system for a thermal power plant is shown, comprising a plurality of power operation and maintenance systems, a twin system, a dispatching center and a communication module running in the thermal power plant, wherein the communication module comprises a signal relay device, and the plurality of power operation and maintenance systems each comprises a data acquisition module, a data processing module and an early warning response module;

[0038] In the present application, the data acquisition module in the power operation and maintenance system collects data on the infrastructure of the power operation and maintenance system, including but not limited to voltage, current, power and temperature, and uploads the collected data to the data processing terminal. After screening and filtering by the data processing terminal, the necessary data is retained to form a real-time work report of the power operation and maintenance system, and the data collected by the data acquisition module is regularly and completely uploaded to the twin system. The twin system simulates the work of the power operation and maintenance system according to the preset power operation and maintenance system model and collected data.

[0039] When the power operation and maintenance system model simulated by the twin system maintains the preset normal operation state, the twin system resets periodically and re-enters the collected data transmitted by the data processing terminal to continue the simulation operation of the power operation and maintenance system. When the power operation and maintenance system model simulated by the twin system shows an abnormal operation state, the twin system starts early warning processing. The twin system calls the preset response instructions and executes them according to the abnormal state of the power operation and maintenance system, and performs simulation operation in the twin system. When the abnormal state in the twin system disappears, the executed preset instructions are copied to the power operation and maintenance system and executed. When the detection data does not change as expected, the maintenance personnel are directly contacted through the early warning response module to enter the site for maintenance. Please refer to Figure 2 The twin system calls and executes preset instructions based on abnormal conditions, including but not limited to one or more combined problems such as voltage, current and power being too high or too low, and performs simulated operation within the twin system. When the detection data within the twin system changes according to the preset standards, the executed preset instructions are copied to the power operation and maintenance system and executed, which greatly increases the degree of automation of the power operation and maintenance system, does not require frequent participation of technical personnel, and easily achieves efficient fault diagnosis and troubleshooting.

[0040] When the data detected by the power operation and maintenance system returns to normal, the safety level will be raised by one. When the safety level does not reach the preset number, the warning ends. When the safety level reaches the preset number, the power maintenance system has accumulated multiple failures and maintenance personnel are required to enter the site for on-site maintenance. After the maintenance is completed and the power grid returns to normal, the safety level is cleared and the warning ends. When the detection data does not change as expected, directly contact the maintenance personnel to enter the site for maintenance to prevent accidents and eliminate safety hazards in time. After the maintenance personnel enter the site for maintenance, the safety level is cleared and the warning ends.

[0041] In particular, the preset instructions in this application are input into the twin system in advance by technical personnel in this field according to the possible faults and their solutions of the power operation and maintenance system to form a fault processing database. At the same time, the fault processing database will be regularly updated according to the processing data of the Internet of Things to ensure the functionality of the fault processing database. When an abnormal state that cannot be handled by the fault processing database occurs, it is necessary to contact maintenance personnel to enter the site in time for maintenance work. After the fault processing is completed, the current abnormal state of the fault and the processing method will be entered into the fault processing database for upgrading.

[0042] The data entry and update methods are well-known to those skilled in the art, and therefore are not disclosed in detail in this application. Those skilled in the art may reasonably design them according to actual conditions.

[0043] The automation level of the power operation and maintenance system is greatly increased, which does not require frequent involvement of technical personnel and makes it easy to achieve efficient fault diagnosis and troubleshooting.

[0044] When the power operation and maintenance system needs to be upgraded, the dispatch center selects several power operation and maintenance systems that are electrically connected to itself for trial upgrades, and transmits the upgraded data to the corresponding power operation and maintenance systems via the Internet of Things and communication modules. The power operation and maintenance system transmits the upgraded data to the twin system, and the twin system performs a trial upgrade. During the trial upgrade, the power operation and maintenance system will transmit its own detection data to the twin system for simulated operation. After the operation is correct, the power operation and maintenance system will be upgraded. Before upgrading the power operation and maintenance system, the twin system will be used to perform a trial upgrade to verify the upgrade content and increase the security of the system upgrade.

[0045] See also Figure 3-4 The data transmission between the power operation and maintenance system and the twin system is two one-way channels. When the twin system is working normally, data interaction is carried out between the power operation and maintenance system and the twin system. When the twin system is upgraded, the power system transmits data to the twin system normally, and the twin system only feedbacks to the power operation and maintenance system whether it is in normal working state, so as to avoid Trojans or viruses being artificially implanted in the data packets downloaded from the Internet of Things, and it is not easy to infect the power operation and maintenance system through the twin system, and it is not easy to cause the overall collapse of the power operation and maintenance system.

[0046] When a twin system crashes during a trial upgrade, the system itself is directly reset to the initial version after the most recent upgrade, and the upgrade failure is fed back to the dispatch center. The dispatch center then re-prepares the upgrade data package and re-upgrades the system, making it less likely that the system will be unable to be updated due to a system upgrade failure.

[0047] See also Figure 5-6The dispatch center divides the power operation and maintenance system into green, yellow and red levels from low to high according to the safety level of the system and the number of abnormal times in the past three months, so that the dispatch center can select the appropriate power operation and maintenance system for trial upgrade. When selecting the trial upgrade objects, the dispatch center must select multiple green and red power operation and maintenance systems to ensure that there are enough samples to reflect the data of the new system in normal operation and abnormal operation, thereby increasing the security of the system upgrade data.

[0048] See also Figure 6-9 The twin system signal is connected with a signal relay device, the relay device includes a signal relay device body 1, the signal relay device body 1 includes a base 101, a switching slot is drilled on the base 101, a communication protocol unit 3 is plugged into the switching slot, the communication protocol unit 3 includes a high-flow communication unit 301 and a low-flow communication unit 302, a connecting line 305 is fixedly connected between the high-flow communication unit 301 and the base 101, an energy storage spring 4 is sleeved on the outer side of the connecting line 305, and both ends of the energy storage spring 4 are fixedly connected to the signal relay device body 1 and the communication protocol unit 3 respectively. The bottom plate of the base 101 and the end of the high-flow communication unit 301 close to each other are fixedly connected with an electromagnetic ring 5 and a magnetic steel ring 6 respectively, the side wall of the low-flow communication unit 302 is fixedly connected with a moving contact 306, the side wall of the switching slot is fixedly connected with a static contact 102 matching the moving contact 306, the upper end of the low-flow communication unit 302 is fixedly connected with a collision part 303, and the opening of the switching slot is fixedly connected with a sealing cover 2 matching itself, the sealing cover 2 includes a cover body 201, and the cover body 201 is provided with a prefabricated groove 202 matching the collision part 303.

[0049] The signal relay device is a device for unidirectional data transmission from the twin system to the power operation and maintenance system. When the twin system is operating normally, the high-flow communication unit 301 is connected to the signal relay device to realize large-flow data interaction. When the twin system enters the trial upgrade state, the electromagnetic ring 5 is started, and the magnetic steel ring 6 and the communication protocol unit 3 are adsorbed toward the bottom plate of the signal relay device body 1, compressing the energy storage spring 4 and storing energy. After that, the electromagnetic ring 5 is powered off, the energy storage spring 4 releases its stored elastic potential energy, breaks the connecting line 305, and destroys the cover 201 along the direction of the prefabricated groove 202 until the moving contact 306 contacts the static contact 102, and the low-flow communication unit 302 is connected to the signal relay device, so that the signal relay device can only transmit data with a small flow, so that the problems existing in the twin system itself are not easy to affect the power operation and maintenance system. After the trial upgrade work is completed, the signal relay device is replaced to restore the normal operation of the twin system.

[0050] Both the base part 101 and the communication protocol unit 3 have a magnetically insulating shell, which reduces the impact of the electromagnetic ring 5 on the basic electronic components in the base part 101 and the communication protocol unit 3 and increases the safety of the signal relay device. The end of the impact part 303 away from the low-flow communication unit 302 is fixedly connected to the guide part 304, and a positioning groove matching the guide part 304 is drilled on the cover body 201. By pressing the guide part 304, irreversible adjustment of the specific part of the communication protocol unit 3 connected to the relay device can be achieved to cope with the situation where the twin system is in a trial upgrade state when the signal relay device is replaced.

[0051] The second implementation method:

[0052] Fig.10 A fault intelligent diagnosis type thermal power plant power operation and maintenance system is shown. After the power operation and maintenance system executes preset instructions, the twin system continuously adjusts according to the preset adjustment instructions and detects data in real time. After the subsequent detection data is normalized, it directly enters the step of whether the level meets the standard. When the subsequent detection data is abnormal, the safety level is accumulated normally. In particular, the adjustment instructions in this application are input by technical personnel in this field together with the preset instructions, and each preset instruction will be associated with several adjustment instructions related to its own operating system, which can effectively prevent the safety level from being easily superimposed, reduce the frequency of maintenance personnel entering the site for maintenance, and increase the continuity of the operation of the power operation and maintenance system.

[0053] Compared with the first implementation, in this implementation, by adding adjustment instructions during the operation of the twin system, it is possible to effectively prevent the safety levels from being easily overlapped, reduce the frequency of maintenance personnel entering the site for maintenance, eliminate the need for frequent shutdown maintenance, and increase the continuity of the operation of the power operation and maintenance system.

[0054] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A fault intelligent diagnosis type power operation and maintenance system for thermal power plants, characterized by: It includes multiple power operation and maintenance systems, twin systems, dispatch centers and communication modules running in thermal power plants, wherein the communication modules include signal relay devices, and the multiple power operation and maintenance systems each include a data acquisition module, a data processing module and an early warning response module; The signal relay device comprises a signal relay device body (1), the signal relay device body (1) comprising a base (101), a switching groove being formed on the base (101), a communication protocol unit (3) being inserted into the switching groove, the communication protocol unit (3) comprising a high-flow communication unit (301) and a low-flow communication unit (302), a connecting line (305) being fixedly connected between the high-flow communication unit (301) and the base (101), an energy storage spring (4) being sleeved on the outer side of the connecting line (305), two ends of the energy storage spring (4) being fixedly connected to the signal relay device body (1) and the communication protocol unit (3), respectively, the base The bottom plate of the part (101) and the end of the high-flow communication unit (301) close to each other are respectively fixedly connected with an electromagnetic ring (5) and a magnetic steel ring (6); the side wall of the low-flow communication unit (302) is fixedly connected with a moving contact (306); the side wall of the switching slot is fixedly connected with a static contact (102) matching the moving contact (306); the upper end of the low-flow communication unit (302) is fixedly connected with an impact part (303); the opening of the switching slot is fixedly connected with a sealing cover (2) matching the low-flow communication unit (302); the sealing cover (2) comprises a cover body (201); and the cover body (201) is provided with a prefabricated groove (202) matching the impact part (303); The signal relay device is a device for unidirectionally transmitting data from the twin system to the power operation and maintenance system. When the twin system is operating normally, the high-flow communication unit (301) is connected to the signal relay device to realize large-flow data interaction. When the twin system enters the trial upgrade state, the electromagnetic ring (5) is started to adsorb the magnetic steel ring (6) and the communication protocol unit (3) toward the bottom plate of the signal relay device body (1), compress the energy storage spring (4), and store energy. After that, the electromagnetic ring (5) is powered off, the energy storage spring (4) releases its stored elastic potential energy, breaks the connecting line (305), and destroys the cover (201) in the direction of the prefabricated groove (202) until the moving contact (306) contacts the static contact (102), and the low-flow communication unit (302) is connected to the signal relay device. The signal relay device can only transmit data with a small flow. After the trial upgrade work is completed, the signal relay device is replaced to restore the normal operation of the twin system. According to the abnormal state of the power operation and maintenance system, the twin system calls and executes the preset response instructions, and performs simulated operation within the twin system. When the abnormal state within the twin system disappears, the executed preset instructions are copied to the power operation and maintenance system and executed. When the detection data does not change as expected, the early warning response module directly contacts the maintenance personnel to enter the site for maintenance.

2. According to claim 1, a fault intelligent diagnosis type thermal power plant power operation and maintenance system is characterized by: When the power operation and maintenance system needs to be upgraded, the dispatching center selects several power operation and maintenance systems that are electrically connected to itself for trial upgrade, and transmits the upgraded data to the corresponding power operation and maintenance systems via the Internet of Things and the communication module. The power operation and maintenance system transmits the upgraded data to the twin system, and the twin system performs a trial upgrade. During the trial upgrade, the power operation and maintenance system transmits its own detection data to the twin system for simulated operation. After the operation is correct, the power operation and maintenance system is upgraded.

3. According to claim 1, a fault intelligent diagnosis type thermal power plant power operation and maintenance system is characterized by: The data transmission between the power operation and maintenance system and the twin system is two unidirectional channels. When the twin system is working normally, data interaction is carried out between the power operation and maintenance system and the twin system. When the twin system is upgraded, the power system transmits data to the twin system normally, and the twin system only feeds back to the power operation and maintenance system whether it is in a normal working state.

4. According to claim 1, a fault intelligent diagnosis type thermal power plant power operation and maintenance system is characterized by: When the twin system crashes during the trial upgrade, the system itself is directly reset to the most recently upgraded initial version, and the upgrade failure is fed back to the dispatch center. The dispatch center re-prepares the upgrade data package and re-performs the system upgrade.

5. The intelligent fault diagnosis type power operation and maintenance system for thermal power plants according to claim 1, characterized in that: The dispatch center divides the power operation and maintenance system into green, yellow and red levels from low to high according to the safety level of the system and the number of abnormal times in the last three months. When selecting trial upgrade objects, the dispatch center must select multiple green and red level power operation and maintenance systems.

6. The intelligent fault diagnosis type power operation and maintenance system for thermal power plants according to claim 1, characterized in that: When the data detected by the power operation and maintenance system returns to normal, the safety level will be increased by one. When the safety level does not reach the preset number, the warning ends. When the safety level reaches the preset number, it means that the power maintenance system has accumulated multiple failures and maintenance personnel are required to enter the site for on-site maintenance. When the maintenance is completed and the power grid returns to normal, the safety level is cleared and the warning ends.

7. The intelligent fault diagnosis type power operation and maintenance system for thermal power plants according to claim 1, characterized in that: The base part (101) and the communication protocol unit (3) both have a magnetically insulating housing.

8. The intelligent fault diagnosis type power operation and maintenance system for thermal power plants according to claim 1, characterized in that: One end of the impact portion (303) away from the low-flow communication unit (302) is fixedly connected to a guide portion (304), and a positioning groove matching the guide portion (304) is bored on the cover body (201).

9. The intelligent fault diagnosis type power operation and maintenance system for thermal power plants according to claim 1, characterized in that: After the power operation and maintenance system executes the preset instructions, the twin system continuously adjusts according to the preset adjustment instructions and detects the data in real time. After the subsequent detection data is normalized, it directly enters the step of whether the level meets the standard. When the subsequent detection data is abnormal, the safety level is accumulated normally.

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