Nuclear power station TXS system device performance diagnosis platform

Abstract

The utility model relates to a nuclear power station TXS system device performance diagnosis platform, comprising a signal simulator and a test cabinet, the test cabinet comprises a rack and a plurality of standard function devices detachably installed on the rack, and the plurality of standard function devices form a minimum system used for realizing reactor protection and control; after the functional device to be diagnosed replaces the corresponding functional device in the minimum system and the minimum system is accessed, the signal simulator sends a test signal to the minimum system and receives a control signal generated by the minimum system according to the test signal. According to the method, the to-be-diagnosed functional device is used for replacing a standard functional device in the TXS minimum system, the TXS minimum system is operated again, and more targeted performance inspection can be performed on the to-be-diagnosed functional device according to the operation result of the TXS minimum system, so that quick troubleshooting or functional inspection and verification of faults are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of nuclear power unit safety instrumentation and control systems, and in particular to a performance diagnostic platform for nuclear power plant TXS system devices. Background Technology

[0002] The Teleperm XS (Safety Instrumentation and Control System) of third-generation European pressurized water reactor (EPR) nuclear power units in China is used to achieve the safety objectives of ensuring reactor subcriticality, ensuring core cooling, and preventing or reducing the leakage of radioactive materials into the external environment in the event of an accident. The diagnosis of faulty equipment in the nuclear power plant's safety instrumentation and control system, the performance of spare parts, and the maintenance skills of operation and maintenance personnel are all key factors affecting the safe and stable operation of the system.

[0003] Current fault diagnosis measures for TXS systems rely on empirical analysis of signal links based on the overall fault phenomena and trends of the TXS system. While theoretically analyzing potential fault points, it's difficult to pinpoint the exact location of flickering defects. Often, the entire TXS system is replaced, increasing costs and wasting resources. The inability to determine the specific fault point may also lead to hidden problems in other parts of the system, reducing overall reliability and stability. Furthermore, identifying the faulty component among the replaced functional parts is challenging, currently relying solely on visual inspection, which is highly unfriendly for DCS system health status management. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a performance diagnostic platform for TXS system devices in nuclear power plants.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a performance diagnostic platform for TXS system devices in a nuclear power plant, comprising: a test cabinet and a signal simulator electrically connected to the test cabinet, wherein...

[0006] The test cabinet includes a rack and multiple standard functional devices detachably mounted on the rack. These standard functional devices constitute a TXS minimum system for reactor protection and control. After the functional device to be diagnosed replaces the corresponding functional device in the TXS minimum system and is connected to the TXS minimum system, the signal simulator sends a test signal to the TXS minimum system. The TXS minimum system generates a control signal based on the test signal and transmits it to the signal simulator.

[0007] Preferably, the functional device includes: a signal modulator, a signal converter, an execution controller, and a logic voter, wherein,

[0008] The signal modulator modulates the output signal of the signal simulator, the signal converter converts the modulated signal, the logic voter judges and votes on the converted signal, and the execution controller generates a control signal based on the voting result to control the action of the external actuator and transmits the control signal to the signal simulator; the external actuator is the nuclear power plant DCS system (Distributed Control System).

[0009] Preferably, the nuclear power plant DCS system includes a safety-grade DCS system, and the test cabinet further includes an interface unit that is communicatively connected to the logic voter and the signal converter, and the interface unit is also connected to the safety-grade DCS system.

[0010] Preferably, the test cabinet further includes: the nuclear power plant DCS system also includes the non-safety-grade DCS system, and the test cabinet further includes: a gateway connected to the interface unit, the gateway being used to connect to the non-safety-grade DCS system.

[0011] Preferably, it further includes: a service unit connected to the interface unit, and an administrator station connected to the service unit.

[0012] Preferably, the test cabinet further includes a TXS computer mounted on the rack via a cage and connected to the administrator station.

[0013] Preferably, the execution controller includes: a first priority determination module electrically connected to the logic voter for determining the priority of the voting results of the logic voter; and a second priority determination module connected to the first priority determination module and the external execution mechanism respectively, receiving the priority determination result of the first priority determination module and outputting a drive command to the external execution mechanism.

[0014] Preferably, the test cabinet further includes a power supply module electrically connected to the plurality of standard functional devices for supplying power to the plurality of standard functional devices.

[0015] Preferably, the test cabinet further includes a wiring board for signal exchange between the standard functional devices, wherein the wiring board is provided with cable interfaces for the standard functional devices.

[0016] Preferably, the test cabinet has a rack with several cages for mounting and fixing the standard functional devices, power modules and / or wiring boards.

[0017] The present invention has the following advantages: by replacing the standard functional device in the TXS minimum system with the functional device to be diagnosed, the TXS minimum system can be rerun. Based on the running results of the TXS minimum system, the functional device to be diagnosed can be subjected to more targeted performance checks, so as to facilitate rapid troubleshooting or functional checks and verifications. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of a nuclear power plant TXS system device performance diagnostic platform according to the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of an embodiment of a nuclear power plant TXS system device performance diagnostic platform according to the present invention;

[0021] Figure 3 This is a schematic diagram of the cabinet structure of an embodiment of a nuclear power plant TXS system device performance diagnostic platform according to the present invention. Detailed Implementation

[0022] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. Features specified with "first," "second," etc., may explicitly or implicitly include one or more of those features. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0024] like Figure 1As shown, in the first embodiment of the nuclear power plant TXS system device performance diagnostic platform of this utility model, it includes: a test cabinet 100 and a signal simulator 10 electrically connected to the test cabinet. The test cabinet 100 includes: a frame and multiple standard functional devices detachably mounted on the frame. The multiple standard functional devices form a minimum TXS system for realizing reactor protection and control. After the functional device to be diagnosed replaces the corresponding functional device in the minimum TXS system and is connected to the minimum TXS system, the signal simulator 10 sends a test signal to the minimum TXS system. The minimum TXS system generates a control signal according to the test signal and transmits it to the signal simulator.

[0025] Specifically, standard functional devices refer to high-performance functional devices. Functional devices are those modules or components in the minimum TXS system capable of performing specific functions. They function identically to the corresponding devices in the nuclear power plant TXS system or those in the warehouse in a real-world TXS system, and are interchangeable and testable. Functional devices specifically include: signal modulator 20, signal converter 30, logic voter 40, and execution controller 50, etc.

[0026] A TXS minimum system refers to a simplified system built using several functional components, capable of realizing the basic functions of a field TXS system. The aforementioned signal modulator 20, signal converter 30, execution controller 50, and logic voter 40 constitute a TXS minimum system, which can be used to modulate, convert, and vote on the analog signal (i.e., test signal) output by the signal simulator 10, simulating the generation of control signals. The standard functional components in the TXS minimum system can all be replaced by the corresponding functional components to be diagnosed. After replacement, the functional component to be diagnosed performs its function in place of the corresponding standard functional component. When the functional component to be diagnosed has a fault, it can be reflected in the control signal.

[0027] In this system, the signal modulator modulates the output signal (i.e., the test signal) of the signal simulator 10, the signal converter 30 converts the modulated signal, the logic voter 40 judges and votes on the converted signal, and the execution controller 50 generates a control signal based on the voting result to control the action of the external actuator and transmits the control signal to the signal simulator 10. The external actuator is the nuclear power plant's DCS system.

[0028] In this embodiment, a minimal TXS system is constructed for reactor protection and control. The TXS system is part of a safety-grade DCS system, used to perform some of the functions of the DCS system and to interact with other parts of the DCS system.

[0029] The DCS system's operating signals (i.e., test signals) are simulated by the signal simulator 10 and sent to the signal modulator 20 for modulation in the form of standard signals (e.g., 4-20mA current and 0-5V voltage signals). Common modulation methods include amplitude modulation, frequency modulation, phase modulation, and digital modulation. The modulated test signals are then transmitted to the signal converter 30 for conversion between standard signals and physical quantities. For example, the signal converter 30 receives a 4-20mA standard signal, which may represent a flow rate, temperature, or other physical quantity. The signal converter 30 converts the standard signal into a physical quantity for subsequent calculations and control. The converted signal is then sent to the logic voter 40, where it performs calculations and voting based on preset logic conditions, which may include threshold comparison, status monitoring, and fault detection. The logic voter 40 calculates the system's response based on the received signal and preset logic rules, generates a judgment result, and sends it to the execution controller 50. The execution controller 50 generates a control signal based on the judgment result, which is used to control the external actuators.

[0030] For example, assuming the temperature signal (i.e., the test signal) simulated by the signal simulator 10 exceeds a safety threshold, the execution controller 50 needs to generate a control signal to trigger an alarm or shut down related equipment. Once the logic voter 40 completes its calculation and voting, it sends the voting result to the execution controller 50. Based on the voting result, the execution controller 50 generates a control signal and sends it to an external actuator (such as a circuit breaker, valve, or other control device) to take necessary actions. In this embodiment, the external actuator is the nuclear power plant's DCS system. Simultaneously, the execution controller 50 can also collect response signals from the external actuator and send the response and control signals to the signal simulator 10. The operator can then determine whether the TXS minimum system constructed in this embodiment is operating normally based on the monitoring results of the signal simulator 10.

[0031] The technical solution of this embodiment allows for the replacement of standard functional devices in the TXS minimum system with the functional device to be diagnosed, followed by rerunning the TXS minimum system. Based on the operating results of the TXS minimum system, more targeted performance checks can be performed on the functional device to be diagnosed, facilitating rapid fault diagnosis or functional testing and verification. This eliminates the need for a complete replacement of the TXS system, saving costs.

[0032] Furthermore, such as Figure 2As shown, the test cabinet includes multiple signal converters 30, which can be identical or different. Different signal converters 30 may be suitable for different types of signals, and setting up several signal converters 30 ensures that the system can handle a variety of signals. Identical signal converters 30 are used as backups.

[0033] The test cabinet includes multiple logic voters 40, which can be identical or different. Different logic voters 40 process signals from different protection channels; setting up several logic voters 40 ensures the system can handle a variety of signals. Identical logic voters 40 are used as backups.

[0034] In an optional embodiment, the execution controller 50 includes: a first priority judgment module electrically connected to the logic voter 40 for judging the priority of the voting results of the logic voter; and a second priority judgment module connected to the first priority judgment module and an external execution mechanism, receiving the priority judgment result of the first priority judgment module and outputting a drive command to the external execution mechanism.

[0035] In this embodiment, by setting a priority judgment module, the system is allowed to precisely control different external actuators according to preset priorities, ensuring that critical operations are handled with priority. When multiple external actuators need to work together, the priority judgment module can coordinate the actions of these external actuators to ensure that they operate in a predetermined order and logic. Through logical judgment, maloperations caused by signal conflicts or errors can be reduced, thereby improving the stability and reliability of the system.

[0036] like Figure 2 As shown, in another embodiment of the nuclear power plant TXS system device performance diagnostic platform of this utility model, the nuclear power plant DCS system includes a safety-grade DCS system, and the test cabinet further includes an interface unit 60 that is communicatively connected to the logic voter 40 and the signal converter 30. The interface unit 60 is also connected to the safety-grade DCS system.

[0037] The nuclear power plant DCS system also includes a non-safety-grade DCS system. The test cabinet also includes a gateway 90 connected to the interface unit, which is used to connect to the non-safety-grade DCS system. The TXS minimum system also includes a service unit 70 connected to the interface unit 60, and an administrator station 80 connected to the service unit 70.

[0038] In this embodiment, the TXS minimum system constructed by this utility model is further provided with an interface unit 60 connected to the security-level DCS system. The interface unit 60 is provided with a gateway 90 connected to the non-security-level DCS system. By connecting the security-level DCS system and the non-security-level DCS system through different interfaces, communication interference can be prevented and the accuracy of data transmission can be ensured. The independent interface allows the non-security-level system to be maintained and upgraded without affecting the security-level system.

[0039] In this embodiment, the connection between the administrator station 80 and the service unit 70 enables centralized management and monitoring of the entire DCS system, improving management efficiency. When a fault occurs in the system or an operation is required, the administrator station can respond quickly and transmit instructions to the corresponding external execution mechanism through the service unit. The service unit, acting as an intermediary, can perform preliminary processing and verification of instructions from the administrator station, ensuring that only legitimate and secure instructions are transmitted to the external execution mechanism.

[0040] like Figure 3 As shown, in one optional embodiment, the test cabinet rack 101 is provided with several cages 102 for mounting and fixing standard functional devices, power modules, and / or wiring boards. The test cabinet also includes: a TXS computer mounted on the rack 101 via the cages 102 and connected to an administrator station; power modules electrically connected to the multiple standard functional devices for supplying power to the multiple standard functional devices; and wiring boards for signal exchange between the standard functional devices. The wiring boards are provided with cable interfaces for use by the standard functional devices.

[0041] In this embodiment, the test cabinet of the TXS minimum system constructed by this invention is equipped with a patch panel for signal exchange between different devices. The various devices within the cabinet are connected via the patch panel, allowing for more efficient cabling and easier expansion of the connection range. If needed, new devices can be directly connected to the patch panel. The cabinet also includes cages for critical equipment, providing physical protection against impacts, dust, moisture, and other environmental factors.

[0042] Another specific embodiment of the nuclear power plant TXS system device performance diagnostic platform constructed by this utility model is as follows:

[0043] Taking the test of whether the performance of the signal converter in the warehouse is qualified as an example, the standard signal converter 30, which was originally running normally in the TXS minimum system, was removed from the cabinet and replaced with the spare signal converter 30' in the warehouse.

[0044] Since all components and modules in the cabinet were designed for detachable installation when the TXS minimum platform was initially built, component replacement is extremely convenient. After replacement, the operator checks all wiring connections and then restarts the TXS minimum platform. The signal emulator 10 simulates a standard temperature signal (i.e., a test signal). Taking the PT100 thermistor as an example, its resistance is approximately 138.5Ω at 100℃. The signal emulator 10 simulates a 138.5Ω electrical signal and sends it to the signal modulator 20.

[0045] After modulation, the signal modulator 20 sends the signal to the signal converter spare part 30'. The signal converter spare part 30' converts the signal into a temperature value signal of 100°C and sends it to the logic voter 40. The logic voter 40 votes and calculates on the temperature signal. For example, if the temperature exceeds a preset threshold, an adjustment command needs to be sent to the control mechanism. The voting result is sent to the execution controller 50, and the execution controller 50 sends a control signal based on the voting result.

[0046] The operator monitors this control signal through the signal simulator 10, or through the CPU of the signal acquisition unit monitored by a remote terminal, and acquires this control signal. Based on the control signal and the simulated standard temperature signal (i.e., the test signal), the operator determines whether the operation of the TXS minimum platform meets the requirements, and then determines whether the performance of the signal converter spare part 30' is intact.

[0047] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, without departing from the concept of the present utility model, the above technical features can be freely combined, and several modifications and improvements can be made, all of which fall within the scope of the protection device of the present utility model. Therefore, all equivalent transformations and modifications made with respect to the scope of the claims of the present utility model should fall within the scope of the claims of the present utility model.

Claims

1. A nuclear power plant TXS system device performance diagnosis platform, characterized in that, The test cabinet comprises: a signal simulator electrically connected with the test cabinet, wherein the test cabinet comprises: a rack and a plurality of standard functional devices detachably mounted on the rack, and the plurality of standard functional devices constitute a TXS minimum system for realizing reactor protection and control; after replacing the corresponding functional device in the TXS minimum system with the functional device to be diagnosed and accessing the TXS minimum system, the signal simulator sends a test signal to the TXS minimum system, and the TXS minimum system generates a control signal according to the test signal and transmits it to the signal simulator.

2. The nuclear power plant TXS system component performance diagnosis platform according to claim 1, characterized in that, The nuclear power plant DCS system comprises a safety class DCS system, and the test cabinet further comprises an interface unit in communication connection with a logic voter and a signal converter, and the interface unit is further connected with the safety class DCS system.

3. The nuclear power plant TXS system component performance diagnosis platform according to claim 2, characterized in that, The nuclear power plant DCS system further comprises a non-safety class DCS system, and the test cabinet further comprises a gateway connected with the interface unit, and the gateway is used for connecting the non-safety class DCS system.

4. The nuclear power plant TXS system component performance diagnosis platform according to claim 2, characterized in that, Further comprising: a service unit connected with the interface unit, and an administrator station connected with the service unit.

5. The nuclear power plant TXS system component performance diagnostic platform of claim 4, wherein, The test cabinet further comprises a TXS computer connected with the administrator station and arranged on the rack through a cage.

6. The nuclear power plant TXS system component performance diagnostic platform of claim 1, wherein, The test cabinet further comprises a power supply module electrically connected with the plurality of standard functional devices and used for supplying power for the plurality of standard functional devices.

7. The nuclear power plant TXS system component performance diagnostic platform of claim 6, wherein, The test cabinet further comprises a wiring board used for signal exchange between the standard functional devices, wherein the wiring board is provided with a cable interface of the standard functional device.

8. The nuclear power plant TXS system component performance diagnostic platform of claim 7, wherein, The rack of the test cabinet is provided with a plurality of cages used for mounting and fixing the standard functional devices, the power supply module and / or the wiring board.

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