System and method for testing response time of reactor protection system

Abstract

The invention relates to the technical field of protection system testing, and discloses a reactor protection system response time testing system and method, and the system comprises a signal switching module which is used for switching the input of a testing signal or a field signal according to a control signal, conditioning the input testing signal or field signal, and outputting the conditioned testing signal or field signal; and the test signal processing module is used for generating a test signal, sending the test signal to the signal switching module, and determining the response time of the reactor protection system to the test signal by receiving a response signal corresponding to the test signal sent by the safety trigger cabinet. Switching between field signals and test signals is achieved through the signal switching module, wire disconnecting and connecting work in the overhaul test process is reduced, cable misconnection is avoided, the test signal processing module generates corresponding test signals according to a test program set by built-in software, the response time is determined by collecting response signals, and the test accuracy is improved. And the test efficiency and the test accuracy of the response time of the protection system are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of protection system testing, and in particular to a system and method for testing the response time of a reactor protection system. Background Art

[0002] As a digital I&C system, the reactor protection system's design basis should define the required capabilities, reliability, and functionality for the overall I&C system and each individual I&C system. These functional requirements include the range, rate of change, accuracy, numerical quantification, computational precision, and response time required for each I&C safety function. The reactor protection system design for the high-temperature reactor demonstration project specifies trigger response times for each protection monitoring variable. The Outline for Periodic Testing and Supervision of Nuclear Safety-Related Systems and Equipment requires that the reactor protection system undergo single-channel response time testing during normal shutdown cycles.

[0003] At present, the reactor protection system of the high-temperature reactor demonstration project uses a set of test fixtures to perform a single-channel response time test for a normal shutdown cycle. When performing the test, it is necessary to simultaneously disconnect the wiring from the site to the signal isolation cabinet and the safety trigger cabinet of the four protection channels, and connect the test fixture wiring to the signal input end of the signal isolation cabinet of the four protection channels and the signal output end of the safety trigger cabinet. The host computer of the test fixture simulates the triggering of the protection monitoring variables of the four channels, and then reads back the results of the logic execution output, supplemented by high-speed recorder measurements to complete the channel response time test. The disadvantage of this fixture is that it requires the disconnection of many cables, which is a critical path work for overhaul; in addition, the disconnection of a large number of cables requires a large workload, which is prone to human errors such as wiring errors. Summary of the Invention

[0004] In view of this, the present invention provides a reactor protection system response time testing system and method to solve the problem that a large number of cables need to be disconnected and connected when performing response time testing on the existing reactor protection system during overhaul, which is prone to cable misconnection.

[0005] In a first aspect, the present invention provides a test system for the response time of a reactor protection system. The test system comprises: a plurality of signal switching modules and a test signal processing module, wherein:

[0006] A signal switching module, wherein a first input end is connected to an output end of the test signal processing module, a second input end inputs a field signal, a control end inputs a control signal, and an output end outputs a conditioned signal. The conditioned signal is processed by the logic cabinet and input into the safety trigger cabinet. The module is used to switch the input test signal or the field signal according to the control signal, and condition the input test signal or the field signal before outputting it.

[0007] A test signal processing module, whose output end is connected to the first input end of the signal switching module, is used to generate a test signal and send it to the signal switching module. Its input end is connected to the output end of the safety trigger cabinet, and determines the response time of the reactor protection system to the test signal by receiving a response signal corresponding to the test signal sent by the safety trigger cabinet.

[0008] The reactor protection system response time test system provided by the present invention utilizes a signal switching module to realize switching between field signals and test signals, thereby reducing the work of disconnecting and wiring during maintenance and testing and avoiding misconnection of cables. The test signal processing module generates corresponding test signals according to the test program set by the built-in software, and determines the response time by collecting the response signal, thereby improving the test efficiency and test accuracy of the protection system response time.

[0009] In an optional embodiment, the signal switching module includes: a control switch, a single-pole double-throw switch, a first input interface, a second input interface, and a first output interface, wherein:

[0010] A control switch connected to an external control device, configured to generate and output a control signal according to an instruction of the external control device;

[0011] A single-pole double-throw switch, whose common terminal is connected to the first output interface, whose normally open terminal is connected to the first input interface, and whose normally closed terminal is connected to the second input interface, is used to switch the first input interface or the second input interface to be connected to the common terminal according to a control signal;

[0012] A first input interface, used for receiving a test signal;

[0013] The second input interface is used to receive field signals;

[0014] The first output interface is used to output the conditioned test signal or the field signal.

[0015] The reactor protection system response time test system provided by the present invention has a single-pole double-throw switch that accurately selects a signal path according to a control signal, ensuring that the test signal or field signal output by the first output interface is complete and interference-free, effectively avoiding signal crosstalk and loss, achieving millisecond-level switching between test signals and field signals, improving signal switching efficiency, and utilizing a signal switching module to achieve switching between test signals and field signals, thereby reducing the work of disconnecting and wiring during maintenance and testing.

[0016] In an optional embodiment, the control switch includes: a first control sub-switch, a second control sub-switch, and a control signal generating unit, wherein:

[0017] a first control sub-switch connected to a first external control device and configured to receive a first instruction;

[0018] a second control sub-switch connected to a second external control device and configured to receive a second instruction;

[0019] The control signal generating unit has a first input terminal connected to the first control sub-switch and a second input terminal connected to the second control sub-switch, and is used to receive the first instruction and the second instruction, and generate and output a control signal according to the first instruction and the second instruction.

[0020] The reactor protection system response time test system provided by the present invention relies on two instructions for the generation of control signals. The second control sub-switch is used to select the channel to be tested to ensure safety during the test process. The first control sub-switch is used to ensure that the channel to be tested has the conditions for injecting the test signal. While the two control sub-switches determine the channel to be tested, the switching between the field signal and the test signal is completed to ensure test safety.

[0021] In an optional embodiment, the test signal processing module includes: a host computer, a communication unit, a data processing unit, a test signal output unit, a response signal receiving unit, and a test interface unit, wherein:

[0022] A host computer, whose first output terminal is connected to the input terminal of the communication unit, is used to obtain a test instruction and send the test instruction to the communication unit;

[0023] a data processing unit, having a first input end connected to the output end of the communication unit, a first output end connected to the input end of the test signal output unit, for simulating the protection monitoring variable signal according to the test instruction to generate a test signal, a second input end connected to the output end of the response signal receiving unit, a second output end connected to the input end of the communication unit, and for determining a response time corresponding to the test signal according to the response signal;

[0024] A test signal output unit, whose output end is connected to the first input end of the test interface unit, receives and outputs the test signal;

[0025] A test interface unit, whose first output terminal is connected to the first input terminal of the signal switching module and whose second input terminal is connected to the output terminal of the safety trigger cabinet, is used to output a test signal and receive a response signal;

[0026] The response signal receiving unit has an input end connected to the second output end of the test interface unit and is used to receive and output the response signal.

[0027] In an optional embodiment, the test signal processing module further includes: a power supply, a printer, and a human-computer interaction unit, wherein:

[0028] A power supply, used to supply power to the test signal processing module;

[0029] A printer, whose input terminal is connected to the second output terminal of the host computer and is used to print the test results according to the printing instruction of the host computer;

[0030] The human-computer interaction unit has an output end connected to the first input end of the host computer and is used to input a test instruction or a print instruction to the host computer.

[0031] The reactor protection system response time test system provided by the present invention utilizes a highly integrated test signal processing module to simulate and generate a test signal by receiving a test instruction, and outputs the test signal after processing. By collecting the response signal, the response time from the test signal input to the response signal issuance is calculated, thereby realizing an efficient and safe test scheme for the reactor protection system response time, meeting the requirements for regular testing and supervision of high-temperature nuclear safety system equipment, reducing the workload of on-site disassembly and wiring, saving overhaul time, and reducing human errors.

[0032] In a second aspect, the present invention provides a method for testing the response time of a reactor protection system, the method being applied to the test system for the response time of a reactor protection system according to any one of the first aspects, the method comprising:

[0033] Obtaining a control signal of the reactor protection system to be tested, and generating a test signal based on the control signal;

[0034] The output time point of the test signal and the receiving time point of the response signal are obtained, and the response time of the test signal is determined according to the output time point and the receiving time point.

[0035] The test method for the response time of a reactor protection system provided by the present invention utilizes a signal switching module to realize switching between a field signal and a test signal, thereby reducing the work of disconnecting and wiring during the maintenance and testing process and avoiding misconnection of cables. The test signal processing module generates a corresponding test signal according to a test program set by built-in software, and determines the response time by collecting the response signal, thereby improving the test efficiency and test accuracy of the protection system response time.

[0036] In an optional embodiment, obtaining a control signal of a reactor protection system to be tested and generating a test signal based on the control signal includes:

[0037] Obtain the control signal of the reactor protection system to be tested, determine the channel to be tested based on the control signal, and establish a test signal link;

[0038] A test signal to be triggered is selected based on the channel to be tested, and a test signal is generated according to the test signal to be triggered and the corresponding preset threshold range, and the test signal is transmitted through a test signal link.

[0039] The reactor protection system response time testing method provided by the present invention selects a channel to be tested according to a control signal, establishes a test signal link, and selects a specific trigger test variable. A test system is used to simulate and inject multiple protection monitoring variable signals. The method has high integration, generates a trigger test signal according to the threshold conditions of the protection monitoring variables during normal operation, and only changes the value of the test signal to be triggered each time, avoiding the influence of other factors and ensuring the accuracy and effectiveness of the test results.

[0040] In an optional embodiment, obtaining a control signal of a protection system of a reactor to be tested includes:

[0041] Obtaining a second instruction issued by a second external control device and clarifying the control state of the channel to be tested;

[0042] According to the control state of the channel to be tested, a first instruction sent by a first external control device is obtained, and a logic AND calculation is performed on the first instruction and the second instruction to obtain a control signal.

[0043] The reactor protection system response time testing method provided by the present invention relies on two instructions for generating a control signal. The second instruction selects a channel to be tested to ensure safety during the test process. The first instruction ensures that the channel to be tested has test signal injection conditions. The two instructions are used to jointly determine the channel to be tested while completing the switching between the field signal and the test signal to ensure test safety.

[0044] In a third aspect, the present invention provides a computer device comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the method of the first aspect or any corresponding embodiment thereof by executing the computer instructions.

[0045] In a fourth aspect, the present invention provides a computer-readable storage medium having computer instructions stored thereon, the computer instructions being used to enable a computer to execute the method of the first aspect or any corresponding embodiment thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0047] Figure 1 2 is a schematic structural diagram of a test system for the response time of a reactor protection system according to an embodiment of the present invention;

[0048] Figure 2 2 is a schematic structural diagram of a signal switching module in a test system for the response time of a reactor protection system according to an embodiment of the present invention;

[0049] Figure 3 2 is a schematic structural diagram of a test signal processing module in a test system for response time of a reactor protection system according to an embodiment of the present invention;

[0050] Figure 4 is a flow chart of a method for testing the response time of a reactor protection system according to an embodiment of the present invention;

[0051] Figure 5 Schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0052] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0053] An embodiment of the present invention provides a test system and method for the response time of a reactor protection system. The system switches between field signals and test signals through a signal switching module 1, generates corresponding test signals through a test signal processing module 2, and determines the response time by collecting response signals, thereby reducing the disconnection and wiring work during the maintenance test process and improving the efficiency of response time testing.

[0054] According to an embodiment of the present invention, a test system for the response time of a reactor protection system is provided. Figure 1 As shown, the test system includes: multiple signal switching modules 1 and a test signal processing module 2.

[0055] like Figure 1 As shown, the signal switching module 1 has a first input end connected to the output end of the test signal processing module 2, a second input end inputs a field signal, a control end inputs a control signal, and an output end outputs a conditioned signal. The conditioned signal is processed by the logic cabinet and input into the safety trigger cabinet, which is used to switch the input test signal or the field signal according to the control signal, and condition the input test signal or the field signal and output it.

[0056] Specifically, based on the design principle of a signal isolation cabinet for each of the four redundant channels of the on-site reactor protection system, a signal switching module 1 is installed in the signal isolation cabinet of each protection channel. Each signal isolation cabinet contains multiple signal switching modules 1. Based on the actual on-site signal acquisition situation, a corresponding test signal, such as temperature, humidity, and pressure, is set for each signal switching module 1. Test signals include analog and digital signals. Therefore, the types of signal switching modules 1 include analog signal switching, conditioning, and distribution modules and digital signal switching, conditioning, and distribution modules. Specifically, the analog signal switching, conditioning, and distribution module acquires one 4-20mA, 1-5V, or 1-10V voltage signal and, after conditioning, isolation, and distribution, outputs four industrial-standard 4-20mA signals. The digital signal switching, conditioning, and distribution module implements one digital signal or contact-type signal input and four contact-type signal outputs. It should be noted that to meet test conditions, the test signals need to undergo signal isolation, conditioning, and distribution. The signal isolation, conditioning, and distribution process is a mature existing technology and will not be elaborated here. The signal switching module 1 not only has the functions of conditioning, isolating and distributing the collected signals required by the reactor protection system, but also realizes the switching between the test signal sent by the test signal processing module 2 and the field signal without disconnecting the wires through the switching function.

[0057] like Figure 1 As shown, the test signal processing module 2 has an output end connected to the first input end of the signal switching module 1, is used to generate a test signal and send it to the signal switching module 1, and its input end is connected to the output end of the safety trigger cabinet. By receiving the response signal corresponding to the test signal sent by the safety trigger cabinet, the response time of the reactor protection system to the test signal is determined.

[0058] Specifically, the test signal processing module 2 generates a test signal and inputs it into the signal switching module 1. Signal switching module 1 selects the test signal or field signal input. The driving signal for the safety measures execution portion of the reactor protection system is integrated into the safety trigger cabinet. When an abnormality occurs in the field signal or test signal, the safety trigger cabinet can issue a response signal to control the alarms and actions of related equipment. When both the test signal and the field signal are normal, the safety trigger cabinet will not be triggered. By changing the state or value of the test signal, the test signal becomes abnormal, thereby triggering the safety trigger cabinet, causing it to generate a response signal corresponding to the test signal. The test signal processing module 2 receives the response signal and determines the response time of the test signal based on the time the test signal is issued and the time the response signal is received, thereby testing the response time of the reactor protection system.

[0059] The reactor protection system response time test system provided in this embodiment uses a signal switching module 1 to realize the switching between the field signal and the test signal, thereby reducing the disconnection and wiring work during the maintenance and testing process and avoiding the occurrence of cable misconnection. The test signal processing module 2 generates a corresponding test signal according to the test program set by the built-in software, and determines the response time by collecting the response signal, thereby improving the test efficiency and test accuracy of the protection system response time.

[0060] In some optional embodiments, such as Figure 2 As shown, the signal switching module 1 includes: a control switch 11 , a single-pole double-throw switch 12 , a first input interface 13 , a second input interface 14 , and a first output interface 15 .

[0061] like Figure 2 As shown, the control switch 11 is connected to an external control device and is used to generate and output a control signal according to an instruction of the external control device.

[0062] Specifically, the external control device can be a button or an external controller, which can issue a control instruction. The control switch 11 receives the control instruction, generates a control signal according to the control instruction, and outputs it to the single-pole double-throw switch 12 to control the single-pole double-throw switch 12 to operate.

[0063] like Figure 2 As shown, the single-pole double-throw switch 12 has its common end connected to the first output interface 15, its normally open end connected to the first input interface 13, and its normally closed end connected to the second input interface 14, and is used to switch the first input interface 13 or the second input interface 14 to the common end according to the control signal.

[0064] The first input interface 13 is used to receive a test signal.

[0065] The second input interface 14 is used to receive a field signal.

[0066] The first output interface 15 is used to output the conditioned test signal or the field signal.

[0067] Specifically, the common end of the single-pole double-throw switch 12 is connected to the first output interface 15, and the normally closed end is connected to the second input interface 14. The second input interface 14 receives external field signals. During normal production on site, the field signal passes through the single-pole double-throw switch 12 and is processed by signal conditioning, distribution, etc. before being output; when testing is required, the control signal connects the normally open end of the single-pole double-throw switch 12 to the common end, and the test signal is input, and is output after signal conditioning, distribution, etc.

[0068] In the test system for the response time of the reactor protection system provided in this embodiment, the single-pole double-throw switch 12 accurately selects the signal path according to the control signal, ensuring that the test signal or the field signal output by the first output interface 15 is complete and interference-free, effectively avoiding signal crosstalk and loss, and realizing millisecond-level switching between the test signal and the field signal, thereby improving the signal switching efficiency. The signal switching module 1 is used to realize the switching between the test signal and the field signal, thereby reducing the disconnection and wiring work during the maintenance and testing process.

[0069] In some optional embodiments, such as Figure 2 As shown, the control switch 11 includes: a first control sub-switch, a second control sub-switch, and a control signal generating unit.

[0070] The first control sub-switch is connected to the first external control device and is used to receive a first instruction.

[0071] The second control sub-switch is connected to the second external control device and is used to receive a second instruction.

[0072] The control signal generating unit has a first input terminal connected to the first control sub-switch and a second input terminal connected to the second control sub-switch, and is used to receive the first instruction and the second instruction, and generate and output a control signal according to the first instruction and the second instruction.

[0073] Specifically, the control signal is jointly controlled by a first external control device and a second external control device. The second external control device is typically a master control switch for the reactor protection system. When it is necessary to switch from an on-site production state to a test state, the reactor protection system is placed in a bypass state, and a first instruction is generated and sent to the second control sub-switch. The first external control device can be a button corresponding to the signal switching module 1. After the reactor protection system is placed in the bypass state, each signal switching module 1 receives a second instruction, and the test signal link is connected through the corresponding button state. For example, if the channel button corresponding to the temperature signal is pressed, the signal switching device corresponding to the temperature signal receives the first instruction. When the first instruction and the second instruction exist simultaneously, the control signal generation unit generates a corresponding control signal, connecting the normally open circuit breaker of the signal switching device to the common terminal and inputting the test signal. This is for example only and is not limited to this.

[0074] During the response time test, a signal switching instruction is generated by the switching button on the signal switching module 1 to realize the switching function between the field signal and the test signal. When the signal is switched, an indicator light is displayed on the front panel of the module.

[0075] In the reactor protection system response time test system provided in this embodiment, the generation of the control signal relies on two instructions. The second control sub-switch is used to select the channel to be tested to ensure safety during the test process. The first control sub-switch is used to ensure that the channel to be tested has the conditions for injecting the test signal. While determining the channel to be tested through the two control sub-switches, the switching between the field signal and the test signal is completed to ensure test safety.

[0076] In some optional embodiments, such as Figure 3 As shown, the test signal processing module 2 includes: a host computer 21 , a communication unit 22 , a data processing unit 23 , a test signal output unit 24 , a response signal receiving unit 26 , and a test interface unit 25 .

[0077] like Figure 3 As shown, the host computer 21 has a first output terminal connected to the input terminal of the communication unit 22 for obtaining a test instruction and sending the test instruction to the communication unit 22 .

[0078] Specifically, the host computer 21 includes a keyboard, display, and mouse (KVM) all-in-one unit. The KVM all-in-one unit integrates a KVM switch, an LCD display, a keyboard, and a touch or trackball mouse. The entire unit is foldable and can be installed in the test device via sliding rails. In addition to the KVM all-in-one unit, the host computer 21 also includes an industrial computer. The host computer 21 is the human-machine interface of the test signal processing module 2. It can provide the operator with a response time test operation interface, send test commands and data to the communication unit 22 via network signals, receive test data, and display test results.

[0079] The staff uses the host computer 21 to generate a test instruction. The test instruction includes the selected channel to be tested, the test program, etc., which is only used as an example but not limited to this.

[0080] The communication unit 22 includes a switch and a communication module. The switch uses the TCP / IP protocol, has 16 ports, and can transmit and receive 100M data. It is rack-mounted and is used to establish a data link between the host computer 21 (KVM and industrial computer) and the communication module. The communication module is a cassette-type plug-in structure that connects to the data processing module via the chassis backplane. A dedicated bus protocol is used between them to achieve two functions: 1) The communication module connected to the switch is connected via an RJ45 interface cable to enable data exchange between the data processing unit 23 and the host computer 21; 2) The communication module connected to the test interface unit 25 is connected via an RJ45 interface cable to transmit network signals from channels other than the channel under test.

[0081] like Figure 3As shown, the data processing unit 23 has a first input end connected to the output end of the communication unit 22, and a first output end connected to the input end of the test signal output unit 24, and is used to simulate the protection monitoring variable signal according to the test instruction to generate a test signal, and a second input end connected to the output end of the response signal receiving unit 26, and a second output end connected to the input end of the communication unit 22, and is used to determine the response time of the corresponding test signal according to the response signal.

[0082] Specifically, the communication unit 22 receives test instructions from the host computer 21, performs necessary logical operations (such as calculating the nuclear power change rate), simulates the protection monitoring variable signal (test signal), and transmits the signal to the on-site signal isolation cabinet through the analog / switch output module. After the test signal is isolated and distributed by the signal isolation cabinet, it is sent to each on-site logic cabinet to participate in the logical calculation. The signal generated after the logical match enters the safety trigger cabinet. The data processing unit 23 uses the switch acquisition module to read back the output signal of the safety trigger cabinet. The test device calculates and records the response time through software. The calculated data is returned to the host computer 21. The data processing unit 23 has RAM and ROM memory to store running programs and calculation data. It has a watchdog design to detect the operation status of the data processing unit 23 in real time. In the event of abnormal operation, it directly stops operation, lights the corresponding fault indicator light, and reports an error. The error information is transmitted to the host computer 21 to remind the operator to handle the fault.

[0083] like Figure 3 As shown, the test signal output unit 24 has its output end connected to the first input end of the test interface unit 25, receives the test signal and outputs it.

[0084] Specifically, the test signal output unit 24 includes a switch output unit and an analog output unit. The switch output unit is used to transmit the digital or contact type signal simulated by the test device to the digital signal switching, conditioning and distribution module of the signal isolation cabinet; the analog output unit is used to transmit the analog signal simulated by the test device to the analog signal switching, conditioning and distribution module of the signal isolation cabinet.

[0085] like Figure 3 As shown, the test interface unit 25 has a first output end connected to the first input end of the signal switching module 1 and a second input end connected to the output end of the safety trigger cabinet, and is used to output a test signal and receive a response signal.

[0086] Specifically, the test interface unit 25 has a dedicated aviation plug connector, which is connected to the on-site signal isolation cabinet, logic cabinet and safety trigger cabinet through prefabricated cables. It can receive the test signal transmitted inside the test device and send it to the on-site signal isolation cabinet (including analog / switch signals) and logic cabinet (network signals). At the same time, it receives the response signal (switch signal) feedback from the on-site safety trigger cabinet and sends it to the data processing unit 23.

[0087] The prefabricated cable can be a multi-core cable, and the cable interface is generally a multi-core aviation connector male head, connecting the test interface unit 25 and the first input interface 13 on the signal switching module 1. The prefabricated cable is equipped with cores according to the actual number of cores required for use, and each core performs different functions depending on the usage requirements. Generally speaking, the prefabricated cable is used to connect the test signal processing module 2 to the signal isolation cabinet, logic cabinet, and safety trigger cabinet of the reactor protection system. The test device uses the prefabricated cable to inject test signals and receive response signals.

[0088] like Figure 3 As shown, the response signal receiving unit 26 has its input end connected to the second output end of the test interface unit 25 and is used to receive and output the response signal.

[0089] Specifically, the response signal receiving unit 26 is used to collect the output signal of the safety trigger cabinet after the field device logic compliance calculation is completed.

[0090] In some optional embodiments, such as Figure 3 As shown, the test signal processing module 2 further includes: a power supply 27, a printer 28, and a human-computer interaction unit.

[0091] like Figure 3 As shown, the power supply 27 is used to supply power to the test signal processing module 2 and provide working power 27 for each unit device inside.

[0092] like Figure 3 As shown, the printer 28 has an input end connected to the second output end of the host computer 21 and is used to print the test results according to the printing instruction of the host computer 21.

[0093] Specifically, the host computer 21 sends a test record printing command to the printer 28 , and the printer 28 prints the test record after receiving the printing command from the host computer 21 .

[0094] like Figure 3 As shown, the human-computer interaction unit has an output end connected to a first input end of the host computer 21 and is used to input a test instruction or a print instruction to the host computer 21 .

[0095] Specifically, the human-computer interaction unit can be a touch screen or a KVM all-in-one machine. For details, please refer to the detailed description of the host computer 21, which will not be repeated here.

[0096] The reactor protection system response time test system provided in this embodiment utilizes a highly integrated test signal processing module 2 to simulate and generate a test signal by receiving a test instruction, and outputs the test signal after processing. By collecting the response signal, the response time from the test signal input to the response signal issuance is calculated, thereby realizing an efficient and safe test scheme for the reactor protection system response time, meeting the requirements for regular testing and supervision of high-temperature nuclear safety system equipment, reducing the workload of on-site disassembly and wiring, saving overhaul time, and reducing human errors.

[0097] In this embodiment, an embodiment of a method for testing the response time of a reactor protection system is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0098] In this embodiment, a method for testing the response time of a reactor protection system is provided, which can be used in the above-mentioned computer system. Figure 4 Flowchart of a method for testing the response time of a reactor protection system according to an embodiment of the present invention, which is applied to a test system for the response time of a reactor protection system in any one of the above embodiments, such as Figure 4 As shown, the process includes the following steps:

[0099] Step S101 : obtaining a control signal of a reactor protection system to be tested, and generating a test signal based on the control signal.

[0100] Specifically, when a response time test is required for the reactor protection system to be tested, the channel where the cabinet of the reactor protection system to be tested is located is placed in a bypass state, and the input signal is switched from the field signal to the test signal through the single-pole double-throw switch 12 of the corresponding signal switching module 1. A test signal is injected according to the functional requirements of the reactor protection system to be tested. For example, if the response time of a temperature signal change needs to be tested, the staff inputs the temperature signal to be tested and other normal signals through the host computer 21, and the temperature signal to be tested can be used as the test signal.

[0101] like Figure 3 As shown, the signal isolation cabinet, logic cabinet, and safety trigger cabinet of the on-site channel to be tested are connected to the test signal processing module 2 using prefabricated cables.

[0102] Step S102 : obtaining the output time point of the test signal and the receiving time point of the response signal, and determining the response time of the test signal according to the output time point and the receiving time point.

[0103] Specifically, the test signal processing module 2 is powered on, the test signal injection prerequisite is established through the button on the signal switching module 1, the test case of the corresponding test signal is selected in the host computer 21 of the test signal processing module 2, and the test is started.

[0104] The test signal processing module 2 sends a test signal to the signal switching module 1 in the signal isolation cabinet, and sends a network signal to the logic cabinet to simulate other channels sending signals to the channel to be tested. The above signals generate a response signal output after logical calculation by the logic cabinet and the safety trigger cabinet. The test signal processing module 2 receives the response signal and records the output time point of the test signal and the receiving time point of the response signal. The time difference between the two time points is the response time of the test signal.

[0105] The test method for the response time of the reactor protection system provided in this embodiment uses the signal switching module 1 to realize the switching between the field signal and the test signal, thereby reducing the disconnection and wiring work during the maintenance and testing process and avoiding the occurrence of cable misconnection. The test signal processing module 2 generates the corresponding test signal according to the test program set by the built-in software, and calculates the response time by collecting the response signal, thereby improving the test efficiency and test accuracy of the protection system response time.

[0106] In some optional implementations, the above step S101 includes:

[0107] Step S1011 , obtaining a control signal of the reactor protection system to be tested, determining a channel to be tested according to the control signal, and establishing a test signal link.

[0108] Specifically, the channel to be tested of the reactor protection system cabinet is placed in a bypass state, and a second instruction is generated. The second instruction is reported to the main control room to inform the main control staff which channel of the reactor protection system (a total of four redundant channels) is ready for testing. Based on the existence of the second instruction, the channel to be tested of the reactor protection system generates a first instruction through the button of the signal switching module 1 in the signal isolation cabinet, and then the control signal takes effect, the channel to be tested is determined, and the conditions for test signal injection are met.

[0109] Step S1012 : selecting a test signal to be triggered based on the channel to be tested, generating a test signal according to the test signal to be triggered and a corresponding preset threshold range, and transmitting the test signal through a test signal link.

[0110] Specifically, a test signal to be triggered is selected based on the channel to be tested, and a test signal is generated based on the test signal to be triggered and the corresponding preset threshold range. For example, if there are 10 variables to be collected and monitored on-site, and variable 3 is to be tested for the response time of triggering the shutdown logic, assuming variable 3 is a temperature signal, the test signal to be triggered is the temperature signal. The threshold for triggering the high-temperature shutdown logic is 380°C. The preset threshold range for normal temperature signals is less than 380°C. When the temperature signal is not less than 380°C, the signal is the trigger test signal. During the actual test, the test device simultaneously injects 10 untriggered test signals. Except for the temperature signal of variable No. 3, the other 9 signals are within the normal value range. The physical quantity injected by test signal No. 3 is greater than 380°C. The temperature signal greater than 380°C is transmitted to the signal isolation cabinet through the test signal link. The signal isolation cabinet sends the collected test signal to the logic cabinet. At the same time, the logic cabinet also collects the signals (network signals) of the other three channels injected by the test signal processing module 2. Among them, variable No. 3 of a certain channel is also in the triggered state. After logical calculation in the logic cabinet, the high temperature shutdown condition is met. At this time, the safety trigger cabinet will output the shutdown signal, and then the test signal processing module 2 will collect the shutdown signal. The time interval from the injection of the test signal to the collection of the shutdown signal is the response time corresponding to the temperature signal.

[0111] The reactor protection system response time testing method provided in this embodiment selects a channel to be tested based on a control signal, establishes a test signal link, and selects a specific trigger test variable. A single test system is used to simulate and inject multiple protection monitoring variable signals. The method has a high level of integration and generates a trigger test signal based on the threshold conditions of the protection monitoring variables during normal operation. Only the value of the test signal to be triggered is changed each time, avoiding the influence of other factors and ensuring the accuracy and effectiveness of the test results.

[0112] In some optional implementations, obtaining a control signal of a reactor protection system to be tested includes:

[0113] A second instruction sent by a second external control device is obtained, and a control state of the channel to be tested is determined.

[0114] A first instruction is generated based on the control state of the channel to be tested, and a logic AND calculation is performed on the first instruction and the second instruction to obtain a control signal.

[0115] In the reactor protection system response time testing method provided in this embodiment, the generation of the control signal relies on two instructions. The second instruction selects the channel to be tested to ensure safety during the test process. The first instruction ensures that the channel to be tested has the conditions for injecting the test signal. While using the two instructions to jointly determine the channel to be tested, the switching between the field signal and the test signal is completed to ensure test safety.

[0116] The embodiment of the present invention also provides a computer device having the above Figure 1-3 A test system for the response time of a reactor protection system as shown in any one of the items.

[0117] See also Figure 5 , Figure 5 is a structural diagram of a computer device provided by an optional embodiment of the present invention, such as Figure 5 As shown, the computer device includes: one or more processors 10, memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components utilize different buses to communicate with each other and can be installed on a common mainboard or installed in other ways as needed. The processor can process the instructions executed in the computer device, including instructions stored in the memory or on the memory to display the graphical information of the GUI on an external input / output device (such as, a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Equally, multiple computer devices can be connected, and each device provides part of the necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 5 A processor 10 is taken as an example.

[0118] The processor 10 may be a central processing unit, a network processor, or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit, a programmable logic device, or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic, or any combination thereof.

[0119] The memory 20 stores instructions that can be executed by at least one processor 10, so that the at least one processor 10 executes the method shown in the above embodiment.

[0120] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and application programs required for at least one function; the data storage area may store data created based on the use of the computer device, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely located relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0121] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid-state drive; the memory 20 may also include a combination of the above types of memory.

[0122] The computer device further includes an input device 30 and an output device 40. The processor 10, the memory 20, the input device 30 and the output device 40 may be connected via a bus or other means. Figure 5 The bus connection is taken as an example.

[0123] The input device 30 can receive input digital or character information and generate key signal input related to user settings and function control of the computer device, such as a touch screen, a keypad, a mouse, a trackpad, a touch pad, an indicator stick, one or more mouse buttons, a trackball, a joystick, etc. The output device 40 can include a display device, an auxiliary lighting device (e.g., an LED), and a tactile feedback device (e.g., a vibration motor). The above-mentioned display device includes but is not limited to a liquid crystal display, a light emitting diode, a display, and a plasma display. In some optional embodiments, the display device can be a touch screen.

[0124] The embodiment of the present invention also provides a computer-readable storage medium. The above-mentioned method according to the embodiment of the present invention can be implemented in hardware, firmware, or implemented as a computer code that can be recorded in a storage medium, or implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and downloaded through a network and will be stored in a local storage medium, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state drive, etc.; further, the storage medium can also include a combination of the above-mentioned types of memory. It can be understood that a computer, a processor, a microprocessor controller or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor or hardware, the method shown in the above embodiment is implemented.

[0125] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A test system for the response time of a reactor protection system, characterized in that: The test system includes: multiple signal switching modules and test signal processing modules, wherein: a signal switching module, wherein a first input end thereof is connected to an output end of the test signal processing module, a second input end thereof inputs a field signal, a control end thereof inputs a control signal, and an output end thereof outputs a conditioned signal, the conditioned signal being processed by a logic cabinet and input into a safety trigger cabinet, and being configured to switch between an input test signal and a field signal according to the control signal, and to condition the input test signal or field signal and output the resultant signal; A test signal processing module, whose output end is connected to the first input end of the signal switching module, is used to generate a test signal and send it to the signal switching module. Its input end is connected to the output end of the safety trigger cabinet, and determines the response time of the reactor protection system to the test signal by receiving a response signal corresponding to the test signal sent by the safety trigger cabinet.

2. The test system according to claim 1, wherein: The signal switching module includes: a control switch, a single-pole double-throw switch, a first input interface, a second input interface, and a first output interface, wherein: A control switch connected to an external control device, configured to generate and output a control signal according to an instruction of the external control device; A single-pole double-throw switch, whose common terminal is connected to the first output interface, whose normally open terminal is connected to the first input interface, and whose normally closed terminal is connected to the second input interface, is used to switch the first input interface or the second input interface to be connected to the common terminal according to a control signal; A first input interface, used for receiving a test signal; The second input interface is used to receive field signals; The first output interface is used to output the conditioned test signal or the field signal.

3. The test system according to claim 2, wherein: The control switch includes: a first control sub-switch, a second control sub-switch, and a control signal generating unit, wherein: a first control sub-switch connected to a first external control device and configured to receive a first instruction; a second control sub-switch connected to a second external control device and configured to receive a second instruction; The control signal generating unit has a first input terminal connected to the first control sub-switch and a second input terminal connected to the second control sub-switch, and is used to receive the first instruction and the second instruction, and generate and output a control signal according to the first instruction and the second instruction.

4. The test system according to claim 1, wherein: The test signal processing module includes: a host computer, a communication unit, a data processing unit, a test signal output unit, a response signal receiving unit, and a test interface unit, wherein: a host computer, a first output terminal of which is connected to the input terminal of the communication unit, for obtaining a test instruction and sending the test instruction to the communication unit; a data processing unit, having a first input end connected to the output end of the communication unit, a first output end connected to the input end of the test signal output unit, for simulating a protection monitoring variable signal according to a test instruction to generate a test signal, a second input end connected to the output end of a response signal receiving unit, a second output end connected to the input end of the communication unit, and for determining a response time corresponding to the test signal according to the response signal; a test signal output unit, whose output end is connected to the first input end of the test interface unit, receiving and outputting a test signal; A test interface unit, whose first output end is connected to the first input end of the signal switching module and whose second input end is connected to the output end of the safety trigger cabinet, is used to output a test signal and receive a response signal; The response signal receiving unit has an input end connected to the second output end of the test interface unit and is used to receive and output the response signal.

5. The test system according to claim 4, characterized in that: The test signal processing module further includes: a power supply, a printer, and a human-computer interaction unit, wherein: A power supply, used to supply power to the test signal processing module; a printer, whose input end is connected to the second output end of the host computer and is used to print the test results according to the printing instruction of the host computer; The human-computer interaction unit has an output end connected to the first input end of the host computer and is used to input a test instruction or a print instruction to the host computer.

6. A method for testing the response time of a reactor protection system, characterized in that: The method is applied to a test system for the response time of a reactor protection system according to any one of claims 1 to 5, and the method comprises: Acquiring a control signal of a reactor protection system to be tested, and generating a test signal based on the control signal; An output time point of the test signal and a reception time point of the response signal are acquired, and a response time of the test signal is determined according to the output time point and the reception time point.

7. The method according to claim 6, characterized in that The step of obtaining a control signal of the reactor protection system to be tested and generating a test signal based on the control signal includes: Acquire a control signal of the reactor protection system to be tested, determine a channel to be tested according to the control signal, and establish a test signal link; A test signal to be triggered is selected based on the channel to be tested, and a test signal is generated according to the test signal to be triggered and a corresponding preset threshold range, and the test signal is transmitted through a test signal link.

8. The method according to claim 7, characterized in that Obtain control signals of the reactor protection system to be tested, including: Obtaining a second instruction sent by a second external control device and determining a control state of the channel to be tested; A first instruction is generated based on the control state of the channel to be tested, and a logic AND calculation is performed on the first instruction and the second instruction to obtain a control signal.

9. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the method according to any one of claims 6 to 8 by executing the computer instructions.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the method according to any one of claims 6 to 8.

Images