RCM-based speed regulator operation and maintenance system

Abstract

The invention discloses an RCM-based speed regulator operation and maintenance system. A PLC and an intelligent terminal identify and execute corresponding operations respectively; the PLC is used for driving a standby power supply contactor in the speed regulator system, so that the corresponding speed regulator equipment is switched to a standby power supply, and the speed regulator equipment can stably work in emergency, or an oil supply pressure valve of a hydraulic actuating mechanism in the speed regulator equipment is adjusted; the intelligent terminal is used for being linked with a circuit breaker in a speed regulator system through hard wiring and executing opening operation during voltage fluctuation; control instructions sent by all the intelligent terminals are transmitted after being verified by the firewall, so that safety logic priority is ensured; and the user terminal receives the speed regulator equipment operation state data transmitted by the control layer and displays the data to a user through processing. According to the invention, the fault of the governor operation and maintenance system can be effectively identified, and the corresponding maintenance strategy can be given in time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of governor operation and maintenance, in particular to a governor operation and maintenance system based on RCM. BACKGROUND

[0002] As the core equipment of a hydropower station, a governor of the hydropower station is mainly used for controlling the start, no-load, grid connection, load increase and decrease, and shutdown of a hydro-generator unit, and can ensure that the frequency of the unit is adjusted within 50Hz±0.2Hz before the unit is connected to the grid, and adjust the load of the unit according to the load set value and participate in the primary frequency modulation of the system after the unit is connected to the grid. The functions thereof include maintaining the stability of the unit speed, controlling the active power distribution between parallel units, meeting the normal operation requirements of the unit (such as start and stop, load increase and decrease), ensuring the safe operation of the unit, and supporting the instructions of the computer monitoring system of the power station to realize economic operation.

[0003] The traditional large hydropower station adopts double PLCs plus double measurement components to improve reliability. In actual operation, the governor may have faults such as stuck electro-hydraulic converter, inconsistent opening degree feedback table and guide vane, and single-chip microcomputer crash. After the duty personnel of the operation and maintenance system sees the faults, a maintenance work order is issued, and through manual scheduling, maintenance personnel are assigned to maintain or repair the abnormal equipment. Moreover, after the maintenance personnel maintain or repair the abnormal equipment, the duty personnel need to be notified to operate, so as to complete the maintenance work order closed loop in the operation and maintenance system.

[0004] Therefore, the existing governor operation and maintenance system has the problems that when a fault occurs, a corresponding maintenance strategy cannot be given in time and there is no reasonable maintenance cycle. SUMMARY

[0005] In view of this, the present application provides a governor operation and maintenance system based on RCM (reliability-centered maintenance) to evaluate the faults that may occur in the operation of the governor and give corresponding maintenance strategies.

[0006] The present application discloses a governor operation and maintenance system based on RCM, which comprises a monitoring layer, a data acquisition layer, a communication layer, a control layer and a user terminal; the monitoring layer is connected with the user terminal through the data acquisition layer, the communication layer and the control layer in sequence; The monitoring layer is used for collecting key parameters of each governor device in the governor system in real time and transmitting the key parameters to the data acquisition layer; the key parameters include mechanical displacement, voltage signal, running speed, current, temperature and pressure; The data acquisition layer is used for performing data processing on the key parameters of the monitoring layer through direct sampling and sending the governor speed abnormality analysis result to the control layer through the communication layer; the data processing includes data filtering, feature extraction, abnormality diagnosis and reliability estimation; The control layer is composed of PLC and intelligent terminal, after receiving the data transmitted by the communication layer, the control layer is identified by PLC and intelligent terminal and corresponding operation is executed respectively; the PLC is used for driving the standby power contactor in the speed regulator system, so that the corresponding speed regulator equipment is switched to the standby power supply, ensuring that the speed regulator equipment can work stably in emergency or adjusting the oil supply pressure valve of the hydraulic actuator in the speed regulator equipment; the intelligent terminal is used for linkage with the circuit breaker in the speed regulator system through hardwiring, and the opening operation during voltage fluctuation is executed; all control instructions issued by the intelligent terminal are transmitted after firewall verification to ensure that the safety logic is prior; The user terminal receives the speed regulator equipment running state data transmitted by the control layer and displays it to the user through processing.

[0007] Further, the monitoring layer includes displacement sensors, voltage transformers, speed measuring devices, current sensors, temperature sensors and pressure sensors. The displacement sensor is used to monitor the displacement change of the mechanical parts of the speed regulator in real time, and capture the slight deformation and position offset of the mechanical structure of the speed regulator; the voltage transformer is used to convert the high voltage signal of the speed regulator system into a low voltage signal for processing by the monitoring layer, while maintaining the integrity of the signal waveform and the accuracy of the phase; the speed measuring device uses non-contact photoelectric encoding technology to accurately record the speed change of the rotating parts of the speed regulator at a sampling frequency. The current sensor is used to collect the current of each speed regulator equipment; the temperature sensor is used to collect the temperature of each speed regulator equipment; the pressure sensor is used to collect the pressure of each speed regulator equipment.

[0008] Further, the data acquisition layer pre-processes the received key parameters, i.e. eliminates data that does not meet the requirements, and then performs feature extraction and reliability estimation, and performs abnormal diagnosis according to the result of reliability estimation.

[0009] Further, when the communication layer detects the result of abnormal diagnosis in the data sent by the data acquisition layer, the user terminal sends a control instruction to the intelligent terminal through the GOOSE protocol to drive the circuit breaker in the speed regulator system to act quickly to disconnect the connection relationship between the speed regulator equipment, realizing the fault isolation of the speed regulator equipment.

[0010] Further, the control layer uses PLC and intelligent terminal to work together, by judging the signals transmitted by the communication layer, the PLC selects to drive the standby power contactor in the speed regulator system or adjusts the oil supply pressure valve of the hydraulic actuator in the speed regulator equipment according to the signals; the intelligent terminal automatically adjusts the running state of the speed regulator equipment according to the preset logic, and provides visual interface information about the user terminal at the same time, facilitating remote monitoring and manual intervention.

[0011] Further, the user terminal provides a visual interface to enable the operation and maintenance personnel to monitor the running state of the governor in real time and perform remote intervention or parameter adjustment.

[0012] Further, the user terminal also integrates a simulation frequency module for simulating the behavior of the equipment of the operation and maintenance system under different working conditions.

[0013] Further, the user terminal tests whether the functions of the data acquisition layer and the control layer are perfect by simulating the data of the key parameters.

[0014] Further, the user terminal is also used for remotely accessing the PLC, modifying the control parameters of the governor system online, or retrieving the real-time waveform of the key parameters through the monitoring server for intervention.

[0015] Further, the data acquisition layer is used for transmitting the key parameters of the monitoring layer to the autonomous controllable IED edge computing unit for data processing through direct sampling.

[0016] Due to the adoption of the above technical solutions, the present application has the following advantages: 1. The collected data is transmitted to the autonomous controllable IED edge computing unit for localized processing, including data filtering, feature extraction, anomaly diagnosis, and reliability estimation, which effectively improves the response speed and reduces the cloud load. The processed data is transmitted through a communication network supporting the GOOSE / SV protocol, a high-speed data channel is built by a switch, and a firewall is used to ensure communication security.

[0017] 2. When an anomaly is detected, the system sends a control instruction to the intelligent terminal through the GOOSE protocol to drive the circuit breaker to act quickly, achieving millisecond-level fault isolation.

[0018] 3. The control terminal cooperates with the PLC and the intelligent terminal to automatically adjust the running state of the equipment according to the preset logic, while providing a visual interface to support remote monitoring and manual intervention.

[0019] 4. The system also integrates a simulation test module to simulate various operating conditions and provide support for parameter optimization. Through the combination of edge computing and autonomous controllable technology, the system significantly improves the real-time performance and reliability while ensuring data security, providing an efficient and stable monitoring and control solution for intelligent governors. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0021] Figure 1 A block diagram of an RCM-based governor operation and maintenance system is provided as an embodiment of the present application. DETAILED DESCRIPTION

[0022] The present application is further described in conjunction with the accompanying drawings and embodiments, and the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art should belong to the scope of protection of the embodiments of the present application.

[0023] Referring to Figure 1 The present application provides an embodiment of an RCM-based governor operation and maintenance system, which includes a monitoring layer 1, a data acquisition layer 2, a communication layer 3, a control layer 4, and a user terminal 5; the monitoring layer is connected with the user terminal 5 through the data acquisition layer 2, the communication layer 3, and the control layer 4 in sequence; The monitoring layer is used to collect key parameters of each governor device in the governor system in real time and transmit them to the data acquisition layer 2; the key parameters include mechanical displacement, voltage signal, running speed, current, temperature, and pressure; The data acquisition layer 2 is used to perform data processing on the key parameters of the monitoring layer 1 through direct sampling and send the governor speed abnormality analysis results to the control layer 4 through the communication layer 3; the data processing includes data filtering, feature extraction, abnormality diagnosis, and reliability estimation; The control layer 4 is composed of PLC and intelligent terminals, and after receiving the data transmitted by the communication layer 3, the PLC and the intelligent terminals identify and respectively execute corresponding operations; the PLC is used to drive the standby power contactor in the governor system, so that the corresponding governor device is switched to the standby power supply, ensuring that the governor device can work stably in an emergency, or adjust the oil supply pressure valve of the hydraulic actuator in the governor device; the intelligent terminal is used to link with the circuit breaker in the governor system through hardwiring and perform the opening operation during voltage fluctuation; all control instructions issued by the intelligent terminals are transmitted after firewall verification to ensure that the safety logic is prioritized; The user terminal 5 receives the governor device running state data transmitted by the control layer 4 and displays it to the user through processing, such as drawing the data into a chart, etc.

[0024] Optionally, the monitoring layer includes a displacement sensor, a voltage transformer, a speed measuring device, a current sensor, a temperature sensor, and a pressure sensor; The displacement sensor is used to monitor the displacement change of the governor mechanical parts in real time, capture the slight deformation and position offset of the governor mechanical structure; the voltage transformer is used to convert the high voltage signal of the governor system into a low voltage signal that can be processed by the monitoring layer 1, while maintaining the integrity and phase accuracy of the signal waveform; the speed measuring device adopts a non-contact photoelectric encoding technology to accurately record the speed change of the rotating parts of the governor at a sampling frequency; The current sensor is used to collect the current of each speed regulator device; the temperature sensor is used to collect the temperature of each speed regulator device; and the pressure sensor is used to collect the pressure of each speed regulator device.

[0025] Optionally, the data acquisition layer 2 pre-processes the received key parameters, i.e. eliminates data that does not meet the requirements, and then performs feature extraction and reliability estimation, and performs abnormal diagnosis according to the result of reliability estimation.

[0026] Optionally, when the communication layer 3 detects the result of abnormal diagnosis in the data sent by the data acquisition layer 2, the user terminal 5 sends a control instruction to the intelligent terminal through the GOOSE protocol, to drive the circuit breaker in the speed regulator system to act quickly, to disconnect the connection relationship between the speed regulator devices, and to realize fault isolation of the speed regulator devices.

[0027] Optionally, the control layer 4 cooperates with the intelligent terminal, judges the signals transmitted by the communication layer 3, and the PLC selects to drive the standby power contactor in the speed regulator system or adjusts the oil supply pressure valve of the hydraulic actuator in the speed regulator device according to the signals; the intelligent terminal automatically adjusts the running state of the speed regulator device according to the preset logic, and provides visual interface information to the user terminal 5, to facilitate remote monitoring and manual intervention, such as quick tripping operation during voltage fluctuation.

[0028] Optionally, the user terminal 5 provides a visual interface, so that the operation and maintenance personnel can monitor the running state of the speed regulator in real time, and perform remote intervention or parameter adjustment.

[0029] Optionally, the user terminal 5 also integrates a simulation frequency module, which is used to simulate the behavior of the devices of the operation and maintenance system under different working conditions, to assist system testing and optimization, and to further improve the adaptability and reliability of the system.

[0030] Optionally, the user terminal 5 tests whether the functions of the data acquisition layer 2 and the control layer 4 are perfect by simulating the data of key parameters.

[0031] Optionally, the user terminal 5 is also used for remotely accessing the PLC, modifying the control parameters of the speed regulator system online, or retrieving the real-time waveform of the key parameters through the monitoring server for intervention.

[0032] Optionally, the data acquisition layer 2 is used to transmit the key parameters of the monitoring layer 1 to the self-controllable IED edge computing unit for data processing through direct sampling, to effectively improve the response speed and reduce the cloud load. The processed data is transmitted through the communication network supporting the GOOSE / SV protocol, a high-speed data channel is built by the switching mechanism, and the firewall ensures the communication security. The self-controllable IED edge computing unit has edge computing capability and reliability estimation, and can preliminarily process and analyze the data.

[0033] Optionally, the communication layer 3 includes a switch and a firewall for ensuring the safe transmission of data while supporting the GOOSE / SV communication protocol to realize the rapid information exchange between devices.

[0034] Optionally, the speed measuring device adopts a non-contact photoelectric encoding technology to accurately record the speed change of the rotating part of the governor at a sampling frequency of 5000 Hz. Each sensor in the monitoring layer 1 is designed with an industrial level and has an IP67 protection level, which can work stably in the complex environment and harsh weather conditions of the governor, ensuring the continuity and reliability of data acquisition.

[0035] Optionally, the autonomous controllable IED edge computing unit is NSD-CCM-V1.0, which adopts a master control chip and a real-time operating system, and is built-in with multiple data verification mechanisms to ensure the integrity and accuracy of data transmission. In the data preprocessing stage, the system can realize intelligent diagnosis of early equipment failure and estimation of equipment reliability. This series of processing is all completed on the edge side, which not only greatly reduces the data transmission volume, but also shortens the system response time to milliseconds, providing time guarantee for subsequent rapid control.

[0036] Optionally, the effective data processed by the edge computing unit enters the communication transmission stage. The system constructs a communication network based on industrial Ethernet. The communication protocol stack supports both GOOSE (general object-oriented speed governor event) and SV (sample value) standard protocols, where the GOOSE protocol is used for transmitting control commands and state information with a transmission delay of less than 4 ms, and the SV protocol is used for transmitting real-time sampling data, supporting the synchronous transmission of up to 80 analog channels and 128 digital channels. In terms of network security, the system deploys a multi-level protection system: an industrial-grade firewall is deployed at the network boundary to realize white list-based access control; encryption algorithms are used at the communication link layer; and digital certificate authentication mechanisms are implemented at the application layer. This three-dimensional security protection design effectively resists network attacks and data leakage risks. In particular, in the case of detecting voltage abnormalities and other emergencies, the system can send a tripping command to the intelligent terminal through a secure and reliable GOOSE channel to ensure that the circuit breaker completes the action within 10 ms, isolating the faulty equipment in time.

[0037] The control layer 4 serves as the execution center of the system and is interconnected with the upper edge computing unit and the lower equipment through an industrial switch by a high-performance PLC and an intelligent terminal. The PLC adopts a multi-core processor architecture, expands I / O modules through a backplane bus, supports analog output (connects a hydraulic actuator), digital input (receives a position sensor signal), and RS-485 communication (accesses a circuit breaker state); the intelligent terminal performs GOOSE / SV communication with the self-controllable IED edge computing unit through an optical fiber Ethernet, and receives voltage transformer, speed measurement unit and other direct sampling data in real time.

[0038] The application combines edge computing and self-controllable technology, significantly improves the real-time performance and reliability of the system while ensuring data security, and provides an efficient and stable monitoring and control solution for the intelligent governor.

[0039] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit it, although the present application has been described in detail with reference to the above examples, those skilled in the art should understand that: the specific embodiments of the present application can still be modified or replaced equivalently without departing from the spirit and scope of the present application, any modification or equivalent replacement which does not depart from the spirit and scope of the present application should be covered within the protection scope of the claims of the present application.

Claims

1. An RCM-based governor operation and maintenance system, characterized in that, The system comprises a monitoring layer, a data acquisition layer, a communication layer, a control layer and a user terminal; the monitoring layer is connected with the user terminal through the data acquisition layer, the communication layer and the control layer in sequence; The monitoring layer is used for collecting key parameters of each governor device in the governor system in real time and transmitting the parameters to the data acquisition layer; The key parameters include mechanical displacement, voltage signal, running speed, current, temperature and pressure; The data acquisition layer is used for performing data processing on the key parameters of the monitoring layer through direct acquisition and sending governor rotating speed abnormality analysis results to the control layer through the communication layer; The data processing includes data filtering, feature extraction, abnormality diagnosis and reliability estimation; The control layer is composed of PLC and intelligent terminals; after receiving the data transmitted by the communication layer, the PLC and the intelligent terminals identify and execute corresponding operations respectively; The PLC is used for driving the standby power contactor in the governor system, so that the corresponding governor device is switched to the standby power source, ensuring that the governor device can work stably in an emergency or adjusting the oil supply pressure valve of the hydraulic actuator in the governor device; the intelligent terminal is used for linkage with the circuit breaker in the governor system through hardwiring to execute the opening operation during voltage fluctuation; all control instructions issued by the intelligent terminals are transmitted after firewall verification to ensure that the safety logic is given priority; The user terminal receives the governor device running state data transmitted by the control layer and displays the data to the user after processing.

2. The RCM-based governor operation and maintenance system according to claim 1, characterized in that, The monitoring layer comprises displacement sensors, voltage transformers, speed measuring devices, current sensors, temperature sensors and pressure sensors; The displacement sensors are used for monitoring the displacement change of the mechanical parts of the governor in real time and capturing the slight deformation and position deviation of the mechanical structure of the governor; the voltage transformers are used for converting the high voltage signal of the governor system into a low voltage signal for processing by the monitoring layer, while maintaining the integrity of the signal waveform and the accuracy of the phase; the speed measuring devices adopt a non-contact photoelectric encoding technology to accurately record the speed change of the rotating parts of the governor at a sampling frequency; The current sensors are used for collecting the current of each governor device; the temperature sensors are used for collecting the temperature of each governor device; and the pressure sensors are used for collecting the pressure of each governor device.

3. The RCM-based governor operation and maintenance system according to claim 1, characterized in that, The data acquisition layer pre-processes the received key parameters, i.e., eliminates data that does not meet the requirements, and then performs feature extraction and reliability estimation, and performs abnormality diagnosis according to the results of the reliability estimation.

4. The RCM-based governor operation and maintenance system according to claim 1, characterized in that, When the communication layer detects the abnormality diagnosis result in the data sent by the data acquisition layer, the user terminal sends a control instruction to the intelligent terminal through the GOOSE protocol to drive the circuit breaker in the governor system to act quickly to disconnect the connection relationship between the governor devices, realizing the fault isolation of the governor devices.

5. The RCM-based governor operation and maintenance system according to claim 1, wherein, The control layer adopts PLC and intelligent terminals to work cooperatively, judges the signals transmitted by the communication layer, the PLC selects to drive the standby power contactor in the governor system or adjusts the oil supply pressure valve of the hydraulic actuator in the governor device according to the signals; the intelligent terminal automatically adjusts the running state of the governor device according to the preset logic and provides visual interface information about the user terminal, facilitating remote monitoring and manual intervention.

6. The RCM-based governor operation and maintenance system according to claim 1, wherein, The user terminal provides a visual interface to enable the operation and maintenance personnel to monitor the running state of the governor in real time and perform remote intervention or parameter adjustment.

7. The RCM-based governor operation and maintenance system according to claim 1, characterized in that, The user terminal also integrates a simulation frequency module for simulating the behavior of the equipment of the operation and maintenance system under different working conditions.

8. The RCM-based governor operation and maintenance system according to claim 7, characterized in that, The user terminal tests whether the functions of the data acquisition layer and the control layer are perfect by simulating the data of the key parameters.

9. The RCM-based governor operation and maintenance system according to claim 1, wherein, The user terminal is also used for remotely accessing the PLC, modifying the control parameters of the governor system online, or intervening through the monitoring server to call the real-time waveform of the key parameters.

10. The RCM-based governor operation and maintenance system according to claim 1, characterized in that, The data acquisition layer is used for transmitting the key parameters of the monitoring layer to the autonomous controllable IED edge computing unit for data processing in a direct sampling manner.

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