Simulation verification platform for steam turbine control system

Abstract

The invention belongs to the technical field of nuclear power plant steam turbine simulation, aims to solve the problems that an existing steam turbine control system simulation machine is insufficient in model precision, lack of multi-system dynamic coupling verification, poor in control protocol adaptability and low in test efficiency, and discloses a steam turbine control system simulation verification platform. Comprising a unit full-range simulation machine, a DCS minimization platform and an I / O interface device, a high-precision virtual nuclear power unit is built through the unit full-range simulation machine, a non-safe DCS control system of an actual unit is simulated through the DCS minimization platform, and the unit full-range simulation machine is in communication connection with a tested steam turbine control system through a preset communication protocol. Therefore, a real operation test environment of the tested steam turbine control system is provided, and data connection between the control system and the process simulation model is realized through the I / O interface device. According to the invention, the simulation test of full working condition coverage and the simulation test verification of various fault working conditions are carried out on the steam turbine control system.

Description

Technical Field

[0001] This application belongs to the field of nuclear power plant steam turbine simulation technology, and in particular relates to a steam turbine control system simulation verification platform. Background Technology

[0002] As the core of safe operation of a nuclear power plant, the turbine control system needs to achieve high-precision regulation and reliable protection of the turbine system under complex operating conditions. In recent years, with the increasing service life of in-service nuclear power units, many nuclear power plants' turbine control systems have faced numerous problems such as maintenance difficulties, insufficient spare parts, and reduced reliability, urgently requiring domestically produced upgrades and replacements.

[0003] After the successful development of a new domestically produced nuclear power turbine control system, comprehensive and meticulous testing and verification are required before it can be used for on-site modification and replacement in nuclear power plants. Currently, domestic manufacturers generally use simple simulators for testing and verification of turbine control systems, only connecting signals related to the core functions of the turbine, and mainly conducting tests and verifications through manual forced and simulated signals. This simulation testing scheme mostly adopts open-loop testing (such as verifying individual logic configuration functions), lacks multi-system coupled simulation capabilities (such as grid frequency fluctuations caused by main pump failure), and cannot verify the dynamic fault tolerance of the control system. At the same time, fault injection relies on manual script writing, making it impossible to accurately reproduce complex system operating conditions and fault conditions, and lacking comprehensive, accurate, and long-term stability testing and verification methods. Summary of the Invention

[0004] The purpose of this application is to provide a simulation and verification platform for a steam turbine control system, which solves the problems of insufficient model accuracy, lack of verification of dynamic coupling of multiple systems, poor compatibility of control protocols, and low testing efficiency in existing steam turbine control system simulators.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A simulation and verification platform for a steam turbine control system includes:

[0007] A full-range simulator for nuclear power units, used to build high-precision virtual nuclear power units;

[0008] The DCS minimization platform is used to simulate the non-safety DCS control system of the actual unit. It communicates with the steam turbine control system under test through a preset communication protocol to provide a real operating test environment for the steam turbine control system under test.

[0009] The I / O interface device is connected to the control system of the turbine under test via hard-wiring to achieve data connection between the control system and the process simulation model.

[0010] According to one embodiment of this application, the full-range simulator for the generator set includes:

[0011] The simulation model server is used to achieve strong coupling simulation of the corresponding model and control logic of the steam turbine control system under test through dynamic parameter feedback, so as to reproduce the state evolution of the real unit under normal, abnormal and accident conditions.

[0012] The data server stores simulation running data through a MySQL database, enabling the storage and management of the running data;

[0013] OWP stations are used to provide a human-machine interface that displays operation and monitoring screens consistent with the actual unit operator station.

[0014] The verification control station is used to call and execute process simulation models and historical operating condition data to reproduce test scenarios.

[0015] According to one embodiment of this application, the simulation model server includes:

[0016] The main system simulation module of the nuclear power unit is used to simulate the workflow of the core physics simulation module, the main coolant simulation module, the fluid and electrical network simulation module, and the containment system simulation module.

[0017] The turbine-related system simulation module is used to simulate the operation and fault conditions of the turbine under test as it evolves from cold state or hot standby to its maximum power operating range.

[0018] According to one embodiment of this application, fault simulation testing is performed via a simulation model server, including:

[0019] Fault injection testing is used to dynamically adjust model operating parameters to simulate equipment failures or abnormal system conditions.

[0020] Fault type coverage testing is used to simulate common and special faults in the fault scenario library.

[0021] According to one embodiment of this application, the verification control station includes:

[0022] The operating condition call module is used to send control commands to the simulation model server, call up various simulation operating conditions of the entire unit, and inject signals into the turbine control system through the I / O interface device to monitor the operating status of the turbine control system.

[0023] The functional test module is used to verify whether all the adjustment and protection control functions of the steam turbine control system are normal.

[0024] The performance testing module is used to measure and verify whether the performance parameters of all adjustments and protection actions of the turbine control system meet the requirements.

[0025] The fault condition test module is used to simulate various abnormal operating conditions of the unit and verify whether the adjustment and protection actions of the turbine control system are normal.

[0026] According to one embodiment of this application, when a full-range nuclear power plant simulator simulates the physical behavior of a real nuclear power plant, it includes:

[0027] The full simulation mode achieves full logic simulation of main control room equipment, remote decompression station equipment, and local operation equipment through hardware binding and high-precision models.

[0028] Partial simulation mode reduces simulation complexity by simplifying functions and cutting down equipment, enabling system verification of preset projects;

[0029] The logic simulation mode replaces physical equations with state machines and Boolean logic to achieve rapid logic verification.

[0030] According to one embodiment of this application, the DCS minimization platform includes:

[0031] The DCS control station adopts a minimal configuration of communication control station to achieve real-time communication connection with the control system of the steam turbine under test; it establishes a communication connection with the model server through the network, retrieves the simulation model operation data of the DCS system, and realizes the simulation operation of the DCS control system of the entire unit.

[0032] Operator station is a human-machine interface terminal used to simulate the actual DCS operating environment.

[0033] According to one embodiment of this application, a DCS minimized platform is used to build a turbine control system operation and testing environment identical to that of an actual unit, including:

[0034] During the design phase, a control logic simulation program is generated using graphical modeling tools based on the DCS logic configuration file.

[0035] During the commissioning phase, the control logic configuration file is revised based on the on-site commissioning data, the simulation model is updated synchronously, and the I / O signal parameters are calibrated.

[0036] During the operation phase, the DCS configuration file is integrated with the Visio format screen file to generate a human-machine interface consistent with the actual DCS.

[0037] According to one embodiment of this application, the I / O interface device includes:

[0038] The communication management unit is used to convert Modbus-TCP protocol data packets sent by the simulation model server into fieldbus protocols supported by the communication coupler;

[0039] Communication couplers are used to employ optical isolation technology to block high-voltage interference signals from damaging the simulator.

[0040] The I / O acquisition module is used for signal acquisition and command output.

[0041] According to one embodiment of this application, the I / O acquisition module communicates with the communication management unit via a Modbus / TCP fieldbus through a communication coupler module, and the communication management unit interacts with the simulation model server via a standard RJ-45 Ethernet interface.

[0042] Compared with the prior art, the turbine control system simulation verification platform provided in this application has the following advantages:

[0043] (1) Full closed-loop verification performance: The virtual machine group provides high-precision input signals → the control system under test executes the real algorithm → the DCS platform feeds back control commands → the simulation model responds dynamically, forming a closed-loop verification chain that covers the entire link of “signal input - logic processing - control output”.

[0044] (2) Full operating condition coverage: Covers all operating conditions of nuclear power units from hot shutdown to full power, supports dynamic coupling simulation of scenarios such as cold start, load transient, and main pump failure, and verifies the full life cycle adaptability of the turbine control system.

[0045] (3) Dynamic coupling verification: Through protocol interaction with the DCS minimized platform (such as Modbus-TCP) and hard-wired signal transmission of I / O interface, closed-loop dynamic response testing of multiple systems (reactor, steam-water system, steam turbine, generator, etc.) is realized, and coupling faults that cannot be detected by traditional open-loop testing (such as grid frequency fluctuations caused by main pump shutdown) are detected.

[0046] This application provides a fully functional simulation and verification platform for steam turbine control systems through innovative designs such as high-precision model algorithms, virtual-real integration, protocol compatibility optimization, and full lifecycle test management. It can realize the full-chain test and verification of "design-debugging-operation" and perform simulation tests covering all operating conditions and various fault conditions of the steam turbine control system. Attached Figure Description

[0047] To more clearly illustrate the technical solution of this application, the accompanying drawings used in the technical description will be briefly introduced below.

[0048] Figure 1 A block diagram of the turbine control system simulation verification platform provided in this application;

[0049] Figure 2 This is a schematic diagram of the structure of the turbine control system simulation verification platform provided in this application;

[0050] Figure 3 The schematic diagram of the I / O interface device of the turbine control system simulation verification platform provided in this application. Detailed Implementation

[0051] The following detailed description provides further details on specific implementation methods.

[0052] This application provides a turbine control system simulation verification platform, which is based on the full-range simulator model data of the target unit and makes targeted improvements and developments to the turbine system process simulation model. It can cover all operating conditions of the reference unit turbine from hot shutdown to maximum power operation range and can simulate relevant fault phenomena in the process, so as to realize all simulation test and verification functions of the turbine control system.

[0053] like Figure 1 As shown, the turbine control system simulation verification platform includes:

[0054] The full-range simulator for the unit is used to build a high-precision virtual nuclear power unit, which includes simulation models of all process systems of the unit and simulation models of control systems other than the turbine control system.

[0055] The DCS minimization platform is used to simulate the non-safety DCS control system of the actual unit. It communicates with the steam turbine control system under test through a preset communication protocol to provide a real operating test environment for the steam turbine control system under test.

[0056] The I / O interface device is connected to the control system of the turbine under test via hard-wiring to achieve data connection between the control system and the process simulation model.

[0057] The full-range simulator of the unit is connected to the control system of the turbine under test through an I / O interface device, and the control system of the turbine under test is connected to the DCS minimized platform through a communication gateway.

[0058] The full-range simulator for the generator set includes:

[0059] The simulation model server is used to achieve strong coupling simulation of the corresponding model and control logic of the steam turbine control system under test through dynamic parameter feedback, so as to reproduce the state evolution of the real unit under normal, abnormal and accident conditions.

[0060] The data server stores simulation running data through a MySQL database, enabling the storage and management of the running data;

[0061] OWP station is used to provide a human-machine interface that displays operation and monitoring screens consistent with the actual unit operator station;

[0062] The verification control station is used to call and execute process simulation models and historical operating condition data to reproduce test scenarios.

[0063] The simulation model server includes:

[0064] The main system simulation module of the nuclear power unit simulates the changes in core power, two-phase flow of the main coolant, and changes in containment temperature and pressure parameters. It includes core physics simulation module, main coolant simulation module, fluid and electrical network simulation module, containment system and DCS system simulation module, to build a simulation operating environment for the main process systems of the entire unit.

[0065] The turbine-related system simulation module is used to simulate the operation and fault conditions of the turbine under test as it evolves from cold state or hot standby to its maximum power operating range.

[0066] The simulation model server will accurately simulate the steam thermal performance parameters under all turbine operating conditions (including fault operation), such as: internal thermal power, overall efficiency and turbine output power, steam quality, steam flow rate, temperature, pressure, enthalpy of each turbine cylinder inlet and outlet at each stage, blade parameters of each stage, piping and turbine sealing management system, etc. All characteristic parameters of control valves and main steam isolation valves, safety valve opening, steam discharge, etc., will be accurately simulated in the model. The turbine metal temperature, steam temperature, and ambient temperature are interrelated; the model will reflect this relationship and accurately simulate its evolution. Temperature differences between the inner and outer walls of the cylinder, and temperature differences between the rotor center and surface, will all be reflected in the simulation model. In particular, the overheating phenomenon of the last stage blades of the low-pressure cylinder caused by turbine startup and excessively high condenser pressure is also within the scope of the simulation. Shaft misalignment caused by changes in main steam parameters, turbine load changes, load interruptions, turbine startup, and tripping will be reflected in the simulation model. The turbine model will also provide simulations of dynamic characteristics such as turbine jacket or flange heating, bearing vibration, cylinder expansion, uneven expansion, and shaft misalignment under start-up, shutdown, and operating conditions. The turbine model will also consider shaft vibration caused by rotor eccentricity, critical speed, bearing cooling oil temperature variations, and water hammer.

[0067] The simulation model server simulates the operating conditions of real nuclear power units, including fault condition simulation; fault simulation testing includes fault injection testing and fault type coverage testing. Fault injection testing is used to dynamically adjust the model's operating parameters to simulate equipment failures or abnormal system conditions; fault type coverage testing is used to simulate common faults and special faults in the fault scenario library.

[0068] General faults refer to a category of faults in a particular field device, that is, all faults that can be assigned to a specific device. These are typically common faults set for field devices, such as valves, pumps, fans, motors, heat exchangers, power systems, transmitters, switch cabinets, digital instrumentation and control systems, switches, instruments, and filters. Examples include pump failures, fan failures, and heat exchanger failures.

[0069] Special faults refer to faults that have a significant impact on the operating conditions of the reference unit and are of particular significance for the verification of the turbine control system. Examples include faults in the high- and intermediate-pressure regulating valves, generator faults, and short-circuit power grid faults.

[0070] The verification control station serves as the monitoring center for the entire simulation verification platform. Test and verification personnel have complete control over the operational status of the entire simulation verification platform, including the simulation equipment for the entire unit's process system and the DCS simulation equipment, monitoring the testing and verification process, and completing the testing and verification work. The verification control station includes:

[0071] The operating condition call module is used to send control commands to the simulation model server, call up various simulation operating conditions of the entire unit, and inject signals into the turbine control system through the I / O interface device to monitor the operating status of the turbine control system.

[0072] The functional test module is used to verify whether all the adjustment and protection control functions of the steam turbine control system are normal.

[0073] The performance testing module is used to measure and verify whether the performance parameters (such as the adjustment response curve and the response time of the protection action) of all the regulation and protection actions of the steam turbine control system meet the requirements.

[0074] The fault condition test module is used to simulate various abnormal operating conditions of the unit and verify whether the adjustment and protection actions of the turbine control system are normal.

[0075] The verification control station uses an advanced human-machine interface to control and monitor the simulation verification process, providing test and verification personnel with a variety of operating methods such as graphical interfaces and expert commands. This allows for convenient and quick real-time monitoring and recording of the verification process, reducing the workload of test and verification and improving work efficiency.

[0076] The verification control station uses database-driven technology and graphical editing software, making the application and maintenance of the verification control station software convenient and simple.

[0077] The full-range simulator for nuclear power plants includes three modes: full simulation, partial simulation, and logical simulation. The full simulation mode uses hardware binding and high-precision models to achieve full logical simulation of main control room equipment, remote shutdown station equipment, and local operating equipment. The partial simulation mode reduces simulation complexity through functional simplification and equipment trimming, enabling system verification of preset projects. The logical simulation mode uses state machines and Boolean logic to replace physical equations, achieving rapid logical verification.

[0078] Specifically, in full simulation mode, all instruments and computerized human-machine interfaces in the control room are available, all equipment controlled from the main control room (MCR) and from the remote shutdown station (RSS) should be simulated, the logic of all the above equipment should be fully simulated according to the drawings provided in the design data package, and some locally operated equipment should be simulated through the verification control station.

[0079] In partial simulation modes, the number of devices simulated in the system can be reduced, and the system can be simplified in terms of function / operation. In logical simulation modes, the actual physical and mathematical models are not used for simulation; instead, logical replicas are used to achieve the simulation requirements.

[0080] The I / O interface device is used to connect the control system of the turbine under test and the simulation model server of the full-range simulator of the unit. It includes a communication management unit, a communication coupler, and an I / O acquisition module connected in sequence, as follows:

[0081] The communication management unit is used to convert Modbus-TCP protocol data packets sent by the simulation model server into fieldbus protocols supported by the communication coupler;

[0082] Communication couplers are used to employ optical isolation technology to block high-voltage interference signals from damaging the simulator.

[0083] The I / O acquisition module is used to acquire and output commands for analog signals, digital signals, pulse accumulation, frequency measurement, and other signals.

[0084] The I / O acquisition module connected to the turbine control system communicates with the communication management unit via a Modbus / TCP fieldbus through a communication coupler module. The communication management unit interacts with the simulation model server via a standard RJ-45 Ethernet interface. The simulation model server receives input signals from various addresses and sends out output signals calculated by the model, thereby completing the detection and control of I / O signals.

[0085] The I / O acquisition devices are divided into several sub-links. The upper network of the communication management unit (UNO) and the model server use one network segment, with IP addresses defined as 100.100.100.*. Each disk in the lower network of the communication management unit (connected to the communication module) uses its own sub-link, with IP addresses defined as 10.10.10.*. This invention's I / O interface system employs a redundant communication link approach. If any of the downstream network cables, switches, or communication couplers of the communication management unit experiences a one-time failure, it does not affect the normal communication of the simulation verification platform's I / O interface system, thus improving the reliability of the I / O interface system.

[0086] The interface system serves as a channel connecting the simulation system and the turbine control system's I / O acquisition system, enabling real-time interaction between process data from the simulation platform and signal data from the turbine control system equipment. The interface system primarily consists of software such as the communication interface program, the configuration tool IOMAP, and the testing tool PanelCheck.

[0087] The interface system integrates configuration, operation, and testing functions, providing a simple configuration and testing interface for easy maintenance and expansion. Efficient testing tools significantly improve the efficiency of problem discovery. The interface program adopts a client / server model and uses TCP / IP (Transmission Control Protocol / Internet Protocol). TCP / IP is independent of any specific computer hardware or operating system, providing an open protocol standard that enables information transmission in heterogeneous network environments, thus building a mature and efficient transmission channel for real-time simulation.

[0088] The interface software, serving as the control system of the simulation verification platform, is uniformly scheduled by MST (Management and Scheduling Tool). The program controlling the UNO (Communication Management Unit) acts as the server, while the MST interface program acts as the client. Upon startup of the simulation verification platform, the MST interface program will simultaneously start and connect synchronously to the server program on the UNO side. The most basic task performed by the interface software is interface data transmission, meaning each loop includes both data sending and receiving. To maintain consistency with the actual power plant frequency, data transmission is completed within 100 milliseconds. The overall structure of the interface system is as follows: Figure 2 As shown.

[0089] The DCS minimal platform includes a DCS control station and an operator station. It establishes a connection with the turbine control system under test through a dedicated communication network to build a turbine control system operation and testing environment identical to that of the actual unit.

[0090] The DCS control station adopts a minimally configured communication control station to achieve real-time communication with the control system of the turbine under test; at the same time, it also establishes a communication connection with the model server through the network to retrieve the simulation model operation data of the DCS system and realize the simulation operation of the DCS control system of the entire unit.

[0091] The operator station is used to provide a human-machine interface for operating terminals, simulating the actual DCS operating environment.

[0092] The DCS minimal platform establishes a test environment for the turbine control system that is identical to that of an actual unit, including:

[0093] During the design phase, a control logic simulation program is generated using graphical modeling tools based on the DCS logic configuration file.

[0094] During the commissioning phase, the control logic configuration file is revised based on the on-site commissioning data, the simulation model is updated synchronously, and the I / O signal parameters are calibrated.

[0095] During the operation phase, the DCS configuration file is integrated with the Visio format screen file to generate a human-machine interface consistent with the actual DCS.

[0096] During the design phase, a specific component library for the DCS is developed, and graphical modeling is performed based on the DCS configuration files. According to the DCS system's I / O point list, interfaces between the DCS simulation system and other simulation systems are added to the software's simulation diagram, generating corresponding DCS simulation model interface variables for data exchange with other simulation verification platform systems.

[0097] When the DCS Level 1 (process control layer of the instrumentation and control system) simulation program generated by the modeling tool is run, it is scheduled in real time by the simulation verification platform support software. Therefore, there is no need to develop separate programs to implement teaching control functions such as freeze, run, fault introduction, snapshot, initial condition setting, backtracking and replay.

[0098] During the commissioning and operation phases, the control logic configuration files from the DCS commissioning and operation phases are used as design inputs for the simulation verification platform to make corrections. The logic control configuration of DCS Level 1 is consistent with the actual DCS logic configuration.

[0099] The DCS Level 2 (human-machine interface layer of the instrumentation and control system) uses another pre-defined platform software for real-time simulation. For process control screens, the dynamic component library is first expanded and developed in the configuration software DcsConf. Then, using the design file (visio format) of the process control screen as the design input, the configuration software DcsConf directly imports and converts the visio format electronic design file into a process monitoring screen file in DcsConf software format, and automatically completes the dynamic attribute connection.

[0100] For the DCS simulation platform, the actual DCS software is used as the reference design input to develop a simulation interface that is completely consistent with the actual DCS Level 2 functions, operations and responses. After the operation and debugging are completed, it is integrated with Level 1 and the process model.

[0101] The Level 2 simulation system will implement related control functions such as freeze, run, fault introduction, snapshot, initial condition setting, backtracking and replay.

[0102] This application achieves full-chain verification of the steam turbine control system from "design to debugging to operation" through protocol compatibility optimization and full life cycle test management. It conducts simulation tests covering all operating conditions and various fault conditions of the steam turbine control system, and flexibly adapts to the resource and accuracy requirements of different verification stages.

[0103] This invention can achieve the following testing and verification functions for domestically produced steam turbine control systems:

[0104] (1) Logic configuration test and verification of steam turbine control system

[0105] This simulation verification platform can simulate the real operating environment of a steam turbine control system, and carry out logic configuration testing and verification of the domestic steam turbine control system to ensure that the configuration logic related to steam turbine regulation and protection is correct and error-free, and to eliminate potential system hazards.

[0106] (2) Testing and verification of communication function between turbine control system and non-safety DCS system

[0107] This simulation verification platform can simulate the data communication environment between the turbine control system and the non-safe DCS system (I / A platform), and carry out communication testing and verification work between the turbine control system and the non-safe DCS system to ensure that the communication function between the turbine control system and the non-safe DCS system is normal, stable and reliable.

[0108] (3) Functional and performance testing and verification of the steam turbine control system

[0109] This simulation verification platform can simulate the real operating environment of a steam turbine control system, and carry out functional and performance testing and verification of the domestic steam turbine control system, including all functional and performance tests under normal operating conditions and fault conditions.

[0110] (4) Long-term operation test and verification of the turbine control system

[0111] This simulation verification platform can simulate the real operating environment of a steam turbine control system, and carry out long-term operation testing of domestically produced steam turbine control systems to verify their operational stability and reliability.

[0112] The above description is only a specific embodiment of this application, but the protection scope of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application.

Claims

1. A simulation verification platform for a steam turbine control system, characterized in that, include: A full-range simulator for nuclear power units, used to build high-precision virtual nuclear power units; The DCS minimization platform is used to simulate the non-safety DCS control system of the actual unit. It communicates with the control system of the steam turbine under test through a preset communication protocol to provide a real test environment for the operation of the steam turbine control system under test. The I / O interface device is connected to the control system of the turbine under test via hard-wiring to achieve data connection between the control system and the process simulation model.

2. The turbine control system simulation verification platform according to claim 1, characterized in that, The full-range simulator for the generator set includes: The simulation model server is used to achieve strong coupling simulation of the corresponding model and control logic of the steam turbine control system under test through dynamic parameter feedback, so as to reproduce the state evolution of the real unit under normal, abnormal and accident conditions. The data server stores simulation running data through a MySQL database, enabling the storage and management of the running data; OWP stations are used to provide a human-machine interface that displays operation and monitoring screens consistent with the actual unit operator station. The verification control station is used to call and execute process simulation models and historical operating condition data to reproduce test scenarios.

3. The turbine control system simulation verification platform according to claim 2, characterized in that, The simulation model server includes: The main system simulation module of the nuclear power unit is used to simulate the workflow of the core physics simulation module, the main coolant simulation module, the fluid and electrical network simulation module, and the containment system simulation module. The turbine-related system simulation module is used to simulate the operation and fault conditions of the turbine under test as it evolves from cold state or hot standby to its maximum power operating range.

4. The turbine control system simulation verification platform according to claim 2, characterized in that, Fault simulation testing is performed using a simulation model server, including: Fault injection testing is used to dynamically adjust model operating parameters to simulate equipment failures or abnormal system conditions. Fault type coverage testing is used to simulate common and special faults in the fault scenario library.

5. The turbine control system simulation verification platform according to claim 2, characterized in that, The verification control station includes: The operating condition call module is used to send control commands to the simulation model server, call up various simulation operating conditions of the entire unit, and inject signals into the turbine control system through the I / O interface device to monitor the operating status of the turbine control system. The functional test module is used to verify whether all the adjustment and protection control functions of the steam turbine control system are normal. The performance testing module is used to measure and verify whether the performance parameters of all adjustments and protection actions of the turbine control system meet the requirements. The fault condition test module is used to simulate various abnormal operating conditions of the unit and verify whether the adjustment and protection actions of the turbine control system are normal.

6. The turbine control system simulation verification platform according to claim 1, characterized in that, When a full-range nuclear power plant simulator simulates the physical behavior of a real nuclear power plant, it includes: The full simulation mode achieves full logic simulation of main control room equipment, remote decompression station equipment, and local operation equipment through hardware binding and high-precision models. Partial simulation mode reduces simulation complexity by simplifying functions and cutting down equipment, enabling system verification of preset projects; The logic simulation mode replaces physical equations with state machines and Boolean logic to achieve rapid logic verification.

7. The turbine control system simulation verification platform according to claim 1, characterized in that, The DCS minimal platform includes: The DCS control station adopts a minimal configuration of communication control station to achieve real-time communication connection with the control system of the steam turbine under test; it establishes a communication connection with the model server through the network, retrieves the simulation model operation data of the DCS system, and realizes the simulation operation of the DCS control system of the entire unit. Operator station is a human-machine interface terminal used to simulate the actual DCS operating environment.

8. The turbine control system simulation verification platform according to claim 1, characterized in that, The DCS minimal platform establishes a test environment for the turbine control system that is identical to that of an actual unit, including: During the design phase, a control logic simulation program is generated using graphical modeling tools based on the DCS logic configuration file. During the commissioning phase, the control logic configuration file is revised based on the on-site commissioning data, the simulation model is updated synchronously, and the I / O signal parameters are calibrated. During the operation phase, the DCS configuration file is integrated with the Visio format screen file to generate a human-machine interface consistent with the actual DCS.

9. The turbine control system simulation verification platform according to claim 1, characterized in that, I / O interface devices include: The communication management unit is used to convert Modbus-TCP protocol data packets sent by the simulation model server into fieldbus protocols supported by the communication coupler; Communication couplers are used to employ optical isolation technology to block high-voltage interference signals from damaging the simulator. The I / O acquisition module is used for signal acquisition and command output.

10. The turbine control system simulation verification platform according to claim 9, characterized in that, The I / O acquisition module communicates with the communication management unit via a Modbus / TCP fieldbus through a communication coupler module. The communication management unit interacts with the simulation model server via a standard RJ-45 Ethernet interface.

Images