A nuclear power plant DCS control station action response time measurement system

Abstract

The present invention belongs to the technical field of nuclear power plant automation control systems, and specifically relates to a nuclear power plant DCS control station action response time measurement system. The system realizes automatic response time measurement through a time synchronization module, a signal output module, and a high-speed switch quantity acquisition module. By establishing an engineer station maintenance interface, a dedicated test script, one-button guided operation and other intelligent methods, the system improves the efficiency of DCS system response time measurement and reduces the workload of personnel. The system can be used for DCS system action response time measurement.

Description

Technical Field

[0001] The present application belongs to the technical field of nuclear power plant automation control systems, and specifically relates to a nuclear power plant DCS control station action response time measurement system. Background Art

[0002] A nuclear power plant's reactor protection system monitors key parameters related to reactor safety. When these parameters reach or exceed set points determined by safety analysis, they generate the control signals necessary to trigger an emergency shutdown and activate dedicated safety features and related support system equipment. This prevents the reactor from exceeding specified safety limits or mitigates the consequences of an accident that does so. The key parameters monitored by the reactor protection system and their protective action settings are determined by safety analysis. The determination of these settings also takes into account measurement uncertainties (such as errors) in instrument channels, the response time of the entire system, and the performance of safety actuators. Appropriate margins should also be added.

[0003] In order to ensure that the reactor protection function determined by the safety analysis of the nuclear power plant is reliable and clear throughout the life cycle of the nuclear power plant, the nuclear power plant needs to regularly measure the reactor protection response time.

[0004] Reactor protection response time measurements must be performed in the nuclear power plant's fully unloaded mode. Ensuring completion during the low-water level period during an outage is crucial for controlling the nuclear power plant's outage schedule. Traditionally, reactor protection response time measurements have been performed using manual tools such as signal generators and oscilloscopes. These mechanical and cumbersome manual steps result in low efficiency, high workload, and the potential for disruption to the plant's critical outage path. Summary of the Invention

[0005] The purpose of this application is to provide a nuclear power plant DCS control station action response time measurement system to solve the problems of low efficiency of response time measurement, high work pressure of personnel, and easy impact on the critical path of nuclear power plant overhaul.

[0006] Technical solution to achieve the purpose of this application:

[0007] The embodiment of the present application provides a system for measuring the action response time of a DCS control station in a nuclear power plant, the system comprising: a master control host computer, a cabinet-side test device, a time synchronization device, and a DCS engineer station;

[0008] The first end of the master host computer is connected to the cabinet side test device via the time synchronization device, and is used to control the cabinet side test device to generate a test signal;

[0009] The output end of the cabinet-side test device is connected to the input end of the DCS control station, and the two input ends of the cabinet-side test device are respectively connected to the output end of the DCS control station and the output end of the time synchronization device, and is used to output the test signal to the input end of the DCS control station, receive the feedback signal of the DCS control station, and determine the response time of the DCS control station according to the clock synchronization signal of the time synchronization device;

[0010] The second end of the master control computer is connected to the DCS engineer station, and is used to send the roll call and required state in the DCS control station configuration specified by the test script to the DCS engineer station, and implement force in the DCS configuration to set the logical state of the DCS control station to the required state during the test;

[0011] The DCS engineer station is connected to the DCS control station and is used to perform configuration management on the DCS control station system.

[0012] Optionally, the cabinet-side testing device includes: a first main control module, a first time synchronization module, a first communication module, a first output module, a high-speed acquisition module and a quick connection terminal board;

[0013] The first main control module is used to receive instructions issued by the main control host computer, generate output instructions corresponding to the first output module, collect signals collected by the high-speed acquisition module and send them to the main control host computer;

[0014] The first time synchronization module is used to obtain a time synchronization signal from the time synchronization device and transmit the time synchronization signal to the first main control module and the high-speed acquisition module;

[0015] The first communication module is used to connect the cabinet-side test device to the main control host computer;

[0016] The first output module is configured to receive an output instruction issued by the first main control module and output the test signal on a designated output channel according to a channel name;

[0017] The high-speed acquisition module is used to collect the output value of the DCS control station and obtain the time synchronization signal from the first time synchronization module, and assign a time tag when the feedback signal is collected in a specific channel and send it to the first main control module;

[0018] The quick connection terminal board is used to connect the cabinet-side test device to the IO channel of the DCS control station.

[0019] Optional,

[0020] A solid-state relay switch contact is connected in series to each output channel of the first output module, and the switch contact is also connected to the high-speed acquisition module. The response time measurement starts from the closing of the solid-state relay switch contact on the output channel until the high-speed acquisition module collects the feedback signal from the DCS control station to obtain the time label.

[0021] Optional,

[0022] The cabinet-side test device is arranged next to the cabinet of the DCS control station. According to the distribution of the DCS control stations where the protection functions to be tested are located, one is arranged in each room. The cabinet-side test device is connected to the time synchronization device via a communication cable reserved between the rooms.

[0023] Optionally, the time synchronization device includes: a second main control module, a second clock synchronization module, a clock signal module, a second communication module and a switch;

[0024] The clock signal module is used to generate a clock synchronization signal;

[0025] The second clock synchronization module is used to send the clock synchronization signal to the cabinet-side test device;

[0026] The second communication module and the obtained switch are used to connect the main control computer and the cabinet side test device, send the control instructions of the main control computer to the cabinet side test device and upload the signals and time tags collected by the cabinet side test device to the main control computer.

[0027] Optionally, the clock signal module obtains an external clock signal through an external antenna, and generates a clock synchronization signal through a built-in clock source when the external clock signal is unavailable.

[0028] Optional,

[0029] The external clock signal is a GPS or BeiDou clock signal.

[0030] Optional,

[0031] The clock synchronization signal generated by the clock signal module has a clock accuracy of not less than 1 ms.

[0032] Optionally, the master control host computer is installed with DCS system response time measurement master control software, test script editing software, DCS engineer station interface software, and cabinet side test device interface software;

[0033] The test script editing software is used to generate a test script and includes a channel definition table and a script editor; the channel definition table is used to correspond the input and output channels of the cabinet-side test device to the input and output channels of the DCS control station, and each input and output channel of the cabinet-side test device corresponds to one or more input and output channels of the DCS control station; the channel definition table includes: the IP address of the cabinet-side test device, the terminal number of the cabinet-side test device quick connection terminal board, the IO channel name of the DCS control station, and the IO channel terminal number of the DCS control station under test; the script editor is used to edit the test script;

[0034] The DCS engineer station interface software is used to send the roll call and required status in the DCS engineer station configuration specified by the test script to the DCS engineer station and implement forcing in the DCS configuration to set the logic state of the DCS system to the required state during the protection function test;

[0035] The cabinet-side test device interface software is used to send the output channels and output values of the cabinet-side test device specified in the test script to the designated cabinet-side test device to start the response time measurement;

[0036] The response time measurement master control software is used to batch select test scripts and send the output channels and output values of the cabinet-side test device to the cabinet-side test device interface software according to the steps of the test script, and send the roll call and demand status in the DCS engineer station configuration to the DCS engineer station interface software.

[0037] Optional,

[0038] The response time measurement main control software automatically generates a channel correspondence relationship and a wiring relationship table of a batch test script through a channel definition table.

[0039] The beneficial technical effects of this application are:

[0040] 1) The embodiment of the present application provides a nuclear power plant DCS control station action response time measurement system, which synchronizes the clocks of each cabinet-side test device and the master control host computer through a clock synchronization device and a clock synchronization module in the cabinet-side test device, ensuring that the time accuracy of the response time measurement is not less than 1ms;

[0041] 2) The embodiment of the present application provides a nuclear power plant DCS control station action response time measurement system. Through the interface between the main control host computer and the DCS engineer station, the DCS engineer station is used to set the state for response time measurement, thereby simplifying the IO channel configuration of the cabinet-side test device and saving manufacturing costs.

[0042] 3) The embodiment of the present application provides a nuclear power plant DCS control station action response time measurement system. The system defines the IO channel correspondence between the cabinet-side test device and the DCS control station under test through a channel definition table, and automatically generates a channel correspondence and wiring relationship table based on the test script for batch test wiring and response time measurement.

[0043] 4) The embodiment of the present application provides a nuclear power plant DCS control station action response time measurement system. Through the test script editor, a strictly standardized test script is generated, which expands the application of this solution and can be used for channel testing, system testing, and logical function testing of the DCS system.

[0044] 5) This embodiment of the present application provides a nuclear power plant DCS control station action response time measurement system. This system utilizes cabinet-side test devices located in each DCS control station room and pre-reserved communication cables to connect the entire test set. When systematic functional testing is not required, the system can be split into individual test devices to test a single DCS control station. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a structural diagram of a nuclear power plant DCS control station action response time measurement system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0046] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described below are only part of the embodiments of the present application, not all of them. Based on the embodiments recorded in this application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0047] Currently, nuclear power plants typically use a strategy of increasing staff and working in three shifts to measure response times. This ensures that the reactor protection response time measurement work is controlled within a 24 / 7 schedule, avoiding affecting the critical path of nuclear power plant overhauls, resulting in high work pressure and low work efficiency.

[0048] To this end, embodiments of the present application provide a system for measuring the action response time of a nuclear power plant DCS system. This system automatically measures response time through a time synchronization module, a signal output module, and a high-speed switch acquisition module. Intelligent methods, such as an engineer station maintenance interface, dedicated test scripts, and one-click guided operation, improve the efficiency of DCS system response time measurement. The reactor protection response time measurement period for each refueling cycle is limited to 4 people and 8 hours, preventing it from becoming a critical path in an overhaul.

[0049] Based on the above content, in order to clearly and in detail illustrate the above advantages of the present application, the specific implementation methods of the present application will be described below with reference to the accompanying drawings.

[0050] See also Figure 1 , this figure is a structural diagram of a nuclear power plant DCS control station action response time measurement system provided in an embodiment of the present application.

[0051] The embodiment of the present application provides a nuclear power plant DCS control station action response time measurement system, comprising: a master control host computer 100, a cabinet side test device 200, a time synchronization device 300 and a DCS engineer station 400;

[0052] The first end of the master host computer 100 is connected to the cabinet side test device 200 via the time synchronization device 300, and is used to control the cabinet side test device 200 to generate a test signal;

[0053] The output end of the cabinet-side test device 200 is connected to the input end of the DCS control station. The two input ends of the cabinet-side test device 200 are respectively connected to the output end of the DCS control station and the output end of the time synchronization device 300. The cabinet-side test device 200 is used to output a test signal to the input end of the DCS control station, receive a feedback signal from the DCS control station, and determine the response time of the DCS control station according to the clock synchronization signal of the time synchronization device 300.

[0054] The second end of the master host computer 100 is connected to the DCS engineer station 400 and is used to send the roll call and required state in the DCS control station configuration specified by the test script to the DCS engineer station 400, and implement force in the DCS configuration to set the logical state of the DCS control station to the required state during the test;

[0055] The DCS engineer station 400 is connected to the DCS control station and is used to configure and manage the DCS control station system.

[0056] In some possible implementations of the embodiments of the present application, the cabinet-side testing device 200 may include: a first main control module, a first time synchronization module, a first communication module, a first output module, a high-speed acquisition module, and a quick connection terminal board;

[0057] The first main control module is used to receive instructions issued by the main control host computer 100, generate output instructions corresponding to the first output module, collect signals collected by the high-speed acquisition module and send them to the main control host computer 100;

[0058] A first time synchronization module is used to obtain a time synchronization signal from the time synchronization device 300 and transmit it to the first main control module and the high-speed acquisition module;

[0059] The first communication module is used to connect the cabinet-side test device 200 to the main control host computer 100;

[0060] The first output module is used to receive output commands from the first main control module and output a test signal on the specified output channel according to the channel name. As an example, depending on the channel, the output value of the test signal can be 0-20mA, 0-10V, PT100 (Ω), frequency, switch value electric shock, etc., which are not listed here one by one.

[0061] A high-speed acquisition module is used to collect the output value of the DCS control station and obtain the time synchronization signal from the first time synchronization module. When the feedback signal is collected in a specific channel, a time tag is assigned and sent to the first main control module;

[0062] The quick connection terminal board is used to connect the cabinet-side test device 200 to the IO channel of the DCS control station.

[0063] In practical applications, the time synchronization accuracy is no less than 1ms.

[0064] In a specific example, a solid-state relay switch contact is connected in series to each output channel of the first output module, and the switch contacts are also connected to a high-speed acquisition module. The response time measurement starts from the closure of the solid-state relay switch contacts on the output channel until the high-speed acquisition module collects the feedback signal from the DCS control station and obtains a time tag.

[0065] In another example, each terminal on the quick-connect terminal board is assigned one or more channel names. According to the channel definition of the protection function to be tested, the terminals of each quick-connect terminal board, the IO terminals of the DCS control station and the test script are matched.

[0066] In some possible implementations of the present application, the cabinet-side test device 200 is arranged at the cabinet side of the DCS control station. According to the distribution of the DCS control stations where the protection function to be tested is located, one is arranged in each room. The cabinet-side test device 200 is connected to the time synchronization device 300 via the communication cable reserved between the rooms, so that the response time of the protection function across the control stations can be measured synchronously. As an example, Figure 1 As shown, there can be 8 cabinet-side test devices 200 , but in actual applications, the number of cabinet-side test devices 200 is not limited to 8, and the number depends on the number of DCS control stations.

[0067] In some possible implementations of the embodiments of the present application, the time synchronization device 300 may include: a second main control module, a second clock synchronization module, a clock signal module, a second communication module, and a switch;

[0068] The clock signal module is used to generate a clock synchronization signal.

[0069] As an example, the clock signal module can obtain an external clock signal via an external antenna. If the external clock signal is unavailable, it generates a clock synchronization signal using a built-in clock source. For example, the external clock signal can be a GPS or Beidou clock signal. In a specific implementation, the clock synchronization signal generated by the clock signal module has a clock accuracy of no less than 1ms.

[0070] A second clock synchronization module, configured to send a clock synchronization signal to the cabinet-side test device 200;

[0071] The second communication module and the obtained switch are used to connect the main control host computer 100 and the cabinet side test device 200, send the control instructions of the main control host computer 100 to the cabinet side test device 200 and upload the signals and time tags collected by the cabinet side test device 200 to the main control host computer.

[0072] In some possible implementations of the embodiments of the present application, the master control computer 100 may be a computer, which has installed therein the DCS system response time measurement master control software, test script editing software, DCS engineer station interface software, and cabinet side test device interface software;

[0073] Test script editing software, used to generate test scripts, includes a channel definition table and a script editor; the channel definition table is used to correspond the input and output channels of the cabinet-side test device 200 with the input and output channels of the DCS control station. Each input and output channel of the cabinet-side test device 200 corresponds to the input and output channels of one or more DCS control stations 100; the channel definition table includes: the IP address of the cabinet-side test device 200, the terminal number of the quick connection terminal board of the cabinet-side test device 200, the IO channel name of the DCS control station, and the IO channel terminal number of the DCS control station; the script editor is used to edit test scripts;

[0074] In one example, the format of a test script is strictly standardized. The test script editor can access channel definition tables and data configured in the DCS engineering station. For each test step, the script editor can define the output channels and output values of the cabinet-side test device, the acquisition channels of the cabinet-side test device, the roll call names and required status in the DCS engineering station configuration, the step intervals, and the channel names for response time measurements. By adding new test scripts, the entire test setup can also be used for channel testing, system testing, and logical function testing of the DCS system.

[0075] The DCS engineer station interface software is used to send the roll call and required status in the DCS engineer station configuration specified in the test script to the DCS engineer station 400 and implement forcing in the DCS configuration to set the logic state of the DCS system to the required state during the protection function test;

[0076] The cabinet-side test device interface software is used to send the output channels and output values of the cabinet-side test device 200 specified by the test script to the designated cabinet-side test device 200 to start the response time measurement;

[0077] The response time measurement main control software is used to batch select test scripts and send the output channels and output values of the cabinet side test device 200 to the cabinet side test device interface software according to the steps of the test script, and send the roll call and demand status in the DCS control station configuration to the DCS control station interface software.

[0078] In practice, the response time measurement control software can identify the output channels and output values of the cabinet-side test device 200, as well as the cabinet-side test device's acquisition channels, for each test step in the test script. If the output channels or acquisition channels of the same cabinet-side test device in different batch-selected test scripts correspond to different DCS control station IO channel names, a prompt will be displayed and the software will be prohibited from continuing. The software will only be allowed to continue running if the batch test script is reselected and the IO channel definitions are consistent.

[0079] In one example, the response time measurement main control software automatically generates a channel correspondence table and a wiring relationship table for a batch test script through a channel definition table.

[0080] The present invention provides a nuclear power plant DCS control station action response time measurement system. This system automatically measures response time through a time synchronization module, a signal output module, and a high-speed switch acquisition module. By establishing an engineer station maintenance interface, dedicated test scripts, and one-click guided operation, the system improves the efficiency of DCS system response time measurement and reduces workload. This system can be used to measure DCS system action response time. By adding test scripts, the system can be expanded to include channel testing, system testing, and logic function testing in DCS systems.

[0081] The present application has been described in detail above with reference to the accompanying drawings and embodiments. However, the present application is not limited to the above embodiments. Various modifications can be made within the scope of knowledge possessed by a person skilled in the art without departing from the purpose of the present application. Any content not described in detail in the present application may be based on existing technologies.

Claims

1. A nuclear power plant DCS control station action response time measurement system, characterized in that: The system includes: a main control host computer, a cabinet-side test device, a time synchronization device and a DCS engineer station; The first end of the master host computer is connected to the cabinet side test device via the time synchronization device, and is used to control the cabinet side test device to generate a test signal; The output end of the cabinet-side test device is connected to the input end of the DCS control station, and the two input ends of the cabinet-side test device are respectively connected to the output end of the DCS control station and the output end of the time synchronization device, and is used to output the test signal to the input end of the DCS control station, receive the feedback signal of the DCS control station, and determine the response time of the DCS control station according to the clock synchronization signal of the time synchronization device; The second end of the master control computer is connected to the DCS engineer station, and is used to send the roll call and required state in the DCS control station configuration specified by the test script to the DCS engineer station, and implement force in the DCS configuration to set the logical state of the DCS control station to the required state during the test; The DCS engineer station is connected to the DCS control station for configuring and managing the DCS control station; The cabinet-side testing device includes: a first main control module, a first time synchronization module, a first communication module, a first output module, a high-speed acquisition module and a quick connection terminal board; The first main control module is used to receive instructions issued by the main control host computer, generate output instructions corresponding to the first output module, collect signals collected by the high-speed acquisition module and send them to the main control host computer; The first time synchronization module is used to obtain a time synchronization signal from the time synchronization device and transmit the time synchronization signal to the first main control module and the high-speed acquisition module; The first communication module is used to connect the cabinet-side test device to the main control host computer; The first output module is configured to receive an output instruction issued by the first main control module and output the test signal on a designated output channel according to a channel name; The high-speed acquisition module is used to collect the output value of the DCS control station and obtain the time synchronization signal from the first time synchronization module, and assign a time tag when the feedback signal is collected in a specific channel and send it to the first main control module; The quick connection terminal board is used to connect the cabinet-side test device to the IO channel of the DCS control station.

2. The nuclear power plant DCS control station action response time measurement system according to claim 1, characterized in that: A solid-state relay switch contact is connected in series to each output channel of the first output module, and the switch contact is also connected to the high-speed acquisition module. The response time measurement starts from the closing of the solid-state relay switch contact on the output channel until the high-speed acquisition module collects the feedback signal from the DCS control station to obtain the time label.

3. The nuclear power plant DCS control station action response time measurement system according to claim 1, characterized in that: The cabinet-side test device is arranged next to the cabinet of the DCS control station. According to the distribution of the DCS control stations where the protection functions to be tested are located, one is arranged in each room. The cabinet-side test device is connected to the time synchronization device via a communication cable reserved between the rooms.

4. The nuclear power plant DCS control station action response time measurement system according to claim 1, characterized in that: The time synchronization device includes: a second main control module, a second clock synchronization module, a clock signal module, a second communication module and a switch; The clock signal module is used to generate a clock synchronization signal; The second clock synchronization module is used to send the clock synchronization signal to the cabinet-side test device; The second communication module and the switch are used to connect the main control computer and the cabinet side test device, send the control instructions of the main control computer to the cabinet side test device, and upload the signals and time tags collected by the cabinet side test device to the main control computer.

5. The nuclear power plant DCS control station action response time measurement system according to claim 4, characterized in that: The clock signal module obtains an external clock signal through an external antenna, and generates a clock synchronization signal through a built-in clock source when the external clock signal is unavailable.

6. The nuclear power plant DCS control station action response time measurement system according to claim 5, characterized in that: The external clock signal is a GPS or BeiDou clock signal.

7. The nuclear power plant DCS control station action response time measurement system according to claim 4, characterized in that: The clock synchronization signal generated by the clock signal module has a clock accuracy of not less than 1 ms.

8. The nuclear power plant DCS control station action response time measurement system according to claim 1, characterized in that: The master control host computer is installed with the DCS system's response time measurement master control software, test script editing software, DCS engineer station interface software, and cabinet side test device interface software; The test script editing software is used to generate a test script and includes a channel definition table and a script editor; the channel definition table is used to correspond the input and output channels of the cabinet-side test device to the input and output channels of the DCS control station, and each input and output channel of the cabinet-side test device corresponds to one or more input and output channels of the DCS control station; the channel definition table includes: the IP address of the cabinet-side test device, the terminal number of the cabinet-side test device quick connection terminal board, the IO channel name of the DCS control station, and the IO channel terminal number of the DCS control station under test; the script editor is used to edit the test script; The DCS engineer station interface software is used to send the roll call and required status in the DCS engineer station configuration specified by the test script to the DCS engineer station and implement forcing in the DCS configuration to set the logic state of the DCS system to the required state during the protection function test; The cabinet-side test device interface software is used to send the output channels and output values of the cabinet-side test device specified in the test script to the designated cabinet-side test device to start the response time measurement; The response time measurement master control software is used to batch select test scripts and send the output channels and output values of the cabinet-side test device to the cabinet-side test device interface software according to the steps of the test script, and send the roll call and demand status in the DCS engineer station configuration to the DCS engineer station interface software.

9. The nuclear power plant DCS control station action response time measurement system according to claim 8, characterized in that: The response time measurement main control software automatically generates a channel correspondence relationship and a wiring relationship table of a batch test script through a channel definition table.

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