Test simulator for reactor protection system

Abstract

The invention belongs to the technical field of testing, and particularly relates to a reactor protection system testing simulator. Comprising an input signal interface, a signal processing module, a threshold comparison module, a delay output module, a relay module and an output signal B interface which are connected in sequence, and an output signal A interface is arranged between the signal processing module and the threshold comparison module. The signal conversion function, the shutdown function and the special safety facility driving function of a reactor protection system can be simulated.

Description

Technical Field

[0001] The invention belongs to the field of testing technology, and in particular relates to a test simulation body for a reactor protection system. Background Art

[0002] The reactor protection system is an important system to ensure the stable operation of the reactor. At present, domestic and foreign manufacturers have developed various special test tools for the reactor protection system to test various functions of the reactor protection system, such as response time test, accuracy test, etc. After the development of these special tools, they need to be tested on the reactor protection system to verify that the performance indicators of the tools meet the design requirements. However, there are several problems in the verification of special tools on the reactor protection system: the time window is insufficient. Especially in the nuclear power plants in service, the time window for verification is only during the overhaul of the unit. The time is short and it is impossible to fully verify the various parameters. When unexpected situations occur, design modifications are required. When the modifications are completed, the time window may have been missed. There is a risk of damaging the equipment of the reactor protection system. When verifying the special test tools, the special test tools and the reactor protection system need to be hard-wired and transmit signals to each other. Therefore, there is a risk of damaging the equipment of the reactor protection system due to problems in the design of the special test tools themselves. At present, no simulation body that can be used to test the special test tools for the reactor protection system has been found. Summary of the invention

[0003] The purpose of the present invention is to provide a reactor protection system test simulation body, which overcomes the defect that the existing reactor protection system special test tools cannot fully perform test verification on the reactor protection system. The reactor protection system special test tool can simulate the reactor protection system signal conversion channel, shutdown test channel, and dedicated safety facility drive channel.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A reactor stack protection system test simulation body comprises an input signal interface, a signal processing module, a threshold comparison module, a delay output module, a relay module, and an output signal B interface which are connected in sequence, wherein the output signal A interface is arranged between the signal processing module and the threshold comparison module.

[0006] The input signal interface is connected to a special test tool to input analog signals and switch signals. The analog signals include current signals, voltage signals, and resistance signals, and the switch signals include normally open and normally closed signals.

[0007] The signal processing module processes and converts the received signal as required.

[0008] Conversion types include: current signal conversion to voltage signal; voltage signal conversion to current signal; resistance signal conversion to current / voltage signal.

[0009] The signal processing module outputs a voltage signal to the threshold comparison module, which is compared with the reference voltage. When performing a high-set value test, if the voltage value is higher than the reference voltage, the relay of the corresponding channel is energized and the LED light of the corresponding channel is turned on. When performing a low-set value test, if the voltage value is lower than the reference voltage, the relay of the corresponding channel is energized and the LED light of the corresponding channel is turned on.

[0010] The delay output module includes an input relay and an output relay. The input relay is connected to the output relay of the threshold comparison module. When the output relay of the threshold comparison module is closed, the output relay of the delay output module is closed after the delay.

[0011] The delay time is adjustable from 0.01 seconds to 9990 minutes.

[0012] The delay output module has 31 working modes, as follows:

[0013] 1: Inching mode, the switch is closed when there is a signal and disconnected when there is no signal;

[0014] 2: Self-locking mode, the relay status flips once after each trigger;

[0015] 3: After triggering, the relay is closed and disconnected after delay time A; the trigger is invalid during the delay period;

[0016] 4: After being triggered, the relay is energized and disconnected after a delay of time A; the trigger will restart the timing during the delay period;

[0017] 5: After being triggered, the relay is energized and disconnected after a delay of time A; the accumulated timing is triggered during the delay period;

[0018] 6: After being triggered, the relay is energized and disconnected after a delay of A; the trigger resets during the delay period;

[0019] 7: After triggering, the relay is energized during the duration of the signal, and the input signal disappears and disconnects after a delay of A; if the relay is triggered again during the delay period, it remains energized, and the timing stops until the last signal disappears, and disconnects after a delay of A;

[0020] 8: After power is turned on, the relay is immediately closed and disconnected after a delay of A seconds until the next power is turned on;

[0021] 9: Give the signal, and the relay will be closed after delaying for time A;

[0022] 10: When a continuous signal is given, the relay is energized after a time of A. When the signal disappears, the relay is disconnected. When the signal disappears for a time of A, the relay is energized. When there is a signal, the relay is disconnected.

[0023] 11: When a continuous signal is given and the time exceeds A, the relay is energized; when the signal disappears for more than A time, the relay is disconnected;

[0024] 12: Give a continuous signal, and after exceeding time A, the relay is energized; give a continuous signal again, and after exceeding time A, the relay is disconnected;

[0025] 13: When a signal is given, the relay closes for A seconds and then disconnects; when the signal disappears, the relay closes again for A seconds and then stops;

[0026] 14: If there is a pulse signal, the relay is disconnected; if there is no pulse signal, the relay is closed after a delay of A time;

[0027] 15: After power on, the relay is closed after a delay of time A until power off;

[0028] 16: After power on, the relay closes for time A and opens for time B, in an infinite cycle; it stops when power is off;

[0029] 17: When there is a continuous signal, the relay is closed for time A and disconnected for time B, in an infinite loop; when the signal disappears, the loop is terminated;

[0030] 18: Give a signal once, the relay will close for time A and disconnect for time B, and the cycle will continue indefinitely; give a signal again to terminate the cycle;

[0031] 19: After power-on, the relay is closed after a delay of time A, and disconnected after a delay of time B;

[0032] 20: Give a signal once, after a delay of A time, the relay is energized, and then disconnected after a delay of B time;

[0033] 21: When a continuous signal is given, the relay is energized after exceeding time A, and disconnected after energizing time B; when the signal disappears, the timing is reset and the relay is disconnected;

[0034] 22: When there is a signal, the relay will automatically disconnect after closing for A time, and then count for B time after disconnection. The signal trigger is invalid during the A+B time;

[0035] 23: When there is a signal, the relay will automatically disconnect after it is energized for A time, and then it will count for B time after it is disconnected, and then it will automatically disconnect after it is energized for A time again;

[0036] 24: No action when there is a signal; Trigger when the signal disappears; The relay is energized and disconnected after a delay of A time;

[0037] 25: The signal disappears, the relay is energized after delay time A, and then the relay is disconnected after delay time B;

[0038] 26: The signal disappears. After the disappearance exceeds the A time, the relay is energized; after the delay of the B time, the relay is disconnected;

[0039] 27: After power-on, the relay is closed for A time and disconnected for B time; after C cycles, the relay disconnects and stops;

[0040] 28: No action after power-on; after a signal is given, the relay is closed for A time and disconnected for B time; after C cycles, the relay disconnects and stops; if a signal is given, it will be executed again;

[0041] 29: After the signal is given more than A times, the relay is energized; it remains energized; the power is cut off and the relay stops;

[0042] 30: After the signal is given more than A times, the relay is energized; it is disconnected after being energized for B time;

[0043] 31: Within C time, after the signal is continuously given for more than A times, the relay will be energized for B time and then disconnected and stop.

[0044] The relay module simulates the reactor protection system's trip circuit breaker, and its output is a dry contact signal, which is consistent with the actual operation on site.

[0045] The output signal A interface is connected to special test tools, oscilloscopes, and multi-purpose pens to verify the accuracy of the signal channel; the output signal B interface is connected to special test tools, oscilloscopes, and multi-purpose pens to simulate the reactor protection system shutdown function and dedicated output function.

[0046] The beneficial effects achieved by the present invention are:

[0047] The present invention can simulate the signal conversion function, shutdown function and special safety facility driving function of the reactor protection system, which are as follows: the analog signal conversion function includes current signal conversion to voltage signal, voltage signal conversion to current signal, resistance signal conversion to current signal, resistance signal conversion to voltage signal, and switch signal normally open / normally closed conversion. The simulated reactor protection system shutdown function includes analog low set value shutdown function, analog high set value shutdown function, RTD signal low set value shutdown function, RTD signal high set value shutdown function, over-temperature and over-power signal shutdown function, switch normally open signal to normally closed signal shutdown function, and switch normally closed signal to normally open signal shutdown function. The analog dedicated safety facility driving function includes the analog low set value driving dedicated safety facility action function, the analog high set value driving dedicated safety facility action function, the RTD signal low set value driving dedicated safety facility action function, the RTD signal high set value driving dedicated safety facility action function, the over-temperature and over-power signal stop driving dedicated safety facility action function, the switch quantity normally open signal to normally closed signal driving dedicated safety facility action function, and the switch quantity normally closed signal to normally open signal driving dedicated safety facility action function. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 A schematic diagram of a test simulation body for a reactor protection system;

[0049] Figure 2 A test flow chart for a reactor protection system test simulation body;

[0050] In the figure: input signal interface 1, signal processing module 2, threshold comparison module 3, delay output module 4, relay module 5, output signal A interface 6, output signal B interface 7. DETAILED DESCRIPTION

[0051] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0052] like Figure 1 As shown: a reactor protection system test simulation body consists of an input signal interface 1, a signal processing module 2, a threshold comparison module 3, a delay output module 4, a relay module 5, an output signal A interface 6, and an output signal B interface 7.

[0053] The input signal interface 1 is connected to a special test tool using a terminal block, and can input analog signals and switch signals. The analog signals include current signals, voltage signals, and resistance signals. The range of the analog signals can be set as needed. The switch signals include normally open and normally closed signals.

[0054] The signal processing module 2 can process and convert the signal input by the special test tool according to the requirements. The conversion types include: converting the current signal into a voltage signal; converting the voltage signal into a current signal; converting the resistance signal into a current / voltage signal;

[0055] Threshold comparison module 3, after the input signal of the special test tool is processed by the signal processing module, the voltage signal is output to the threshold comparison module, and compared with the reference voltage (the reference voltage is adjustable). When performing a high-set value test, if the voltage value is higher than the reference voltage, the relay of the corresponding channel is energized, and the LED light of the corresponding channel is lit. When performing a low-set value test, if the voltage value is lower than the reference voltage, the relay of the corresponding channel is energized, and the LED light of the corresponding channel is lit.

[0056] The delay output module 4 can test the response time function by modifying the delay time. The delay output module is designed with two groups of relays, namely input relays and output relays. The input relays are connected to the output relays of the threshold comparison module. When the output relay of the threshold comparison module is closed, the output relay of the delay output module is closed after a certain delay time. The delay time is adjustable from 0.01 seconds to 9990 minutes. The delay output module has 31 working modes.

[0057] 1: Inching mode, it is closed when there is a signal and disconnected when there is no signal.

[0058] 2: Self-locking mode, the relay status flips once after each trigger.

[0059] 3: After triggering, the relay is energized and disconnected after delay time A; the triggering is invalid during the delay period.

[0060] 4: After being triggered, the relay is energized and disconnected after a delay of time A; the trigger will restart the timing during the delay period.

[0061] 5: After being triggered, the relay is energized and disconnected after a delay of time A; the accumulated timing is triggered during the delay period.

[0062] 6: After triggering, the relay is closed and disconnected after a delay of A; the trigger resets during the delay period (the relay disconnects)

[0063] 7: After being triggered, the relay is energized during the duration of the signal, and disconnected after the delay time A when the input signal disappears; if the relay is triggered again during the delay period, it remains energized, and the timing stops until the last signal disappears, and disconnected after the delay time A.

[0064] 8: After power is turned on, the relay will be immediately closed and disconnected after a delay of A seconds until the next power is turned on.

[0065] 9: Give a signal, and the relay will energize after a delay of A time.

[0066] 10: When a continuous signal is given, the relay is energized after a time of A; when the signal disappears, the relay is disconnected. When the signal disappears for a time of A, the relay is energized; when a signal is given, the relay is disconnected.

[0067] 11: When a continuous signal is given and the time exceeds A, the relay is energized; when the signal disappears for more than A time, the relay is disconnected.

[0068] 12: When a continuous signal is given, the relay is closed after exceeding time A; when a continuous signal is given again, the relay is disconnected after exceeding time A.

[0069] 13: When a signal is given, the relay closes for A seconds and then disconnects; when the signal disappears, the relay closes again and then stops after A seconds.

[0070] 14: When there is a pulse signal (rising edge or falling edge), the relay is disconnected. When there is no pulse signal, the relay is energized after a delay of A (continuous high level or continuous low level is considered as no pulse).

[0071] 15: After power-on, the relay is closed after a delay of time A until power is cut off.

[0072] 16: After power on, the relay closes for time A and opens for time B, in an infinite cycle; it stops when power off.

[0073] 17: When there is a continuous signal, the relay will be closed for time A and disconnected for time B, in an infinite loop; when the signal disappears, the loop ends.

[0074] 18: Give a signal once, the relay will be closed for time A and disconnected for time B, and the cycle will be infinite; give a signal again to terminate the cycle.

[0075] 19: After power-on, the relay is closed after a delay of time A, and disconnected after a delay of time B.

[0076] 20: Give a signal, delay A time, the relay is energized, and disconnected after B time.

[0077] 21: When a continuous signal is given, the relay will be energized after the A time has passed, and will be disconnected after the B time has passed; when the signal disappears, the timing is reset and the relay is disconnected.

[0078] 22: When there is a signal, the relay will automatically disconnect after being energized for A time, and then count for B time after disconnection. The signal trigger is invalid during the A+B time.

[0079] 23: When there is a signal, the relay will automatically disconnect after being energized for A time. After disconnection, it will count for B time, and then it will automatically disconnect after being energized for A time again.

[0080] 24: No action when there is a signal; Trigger when the signal disappears; The relay is energized and disconnected after a delay of A time.

[0081] 25: The signal disappears, and the relay is energized after a delay of time A; the relay is disconnected after a delay of time B.

[0082] 26: The signal disappears. After the disappearance exceeds the A time, the relay is energized; after the delay of B time, the relay is disconnected.

[0083] 27: After power-on, the relay is closed for time A and disconnected for time B; after the cycle is C times, the relay disconnects and stops.

[0084] 28: No action after power-on; after a signal is given, the relay is closed for A time and disconnected for B time; after C cycles, the relay disconnects and stops; if a signal is given, it will be executed again.

[0085] 29: After the signal is given more than A times, the relay is energized; it remains energized; the power is cut off and the relay stops.

[0086] 30: After the signal is given more than A times, the relay is energized; it is disconnected after being energized for B time.

[0087] 31: Within C time, after the signal is continuously given for more than A times, the relay will be energized for B time and then disconnected and stop.

[0088] The relay module 5 simulates the reactor protection system's trip circuit breaker, and its output is a dry contact signal, which is consistent with the actual operation on site. The input of the relay module is connected to the output of the delay output module, and the output is connected to a special test tool.

[0089] One end of the output A interface 6 is connected to the output of the signal processing module, and the other end can be connected to a special test tool, an oscilloscope, a multi-purpose pen or other measuring instrument to verify the accuracy of the signal channel.

[0090] One end of the output B interface 7 is connected to the output of the relay module, and the other end can be connected to special test tools, oscilloscopes, multi-point pens and other measuring instruments, which can simulate the reactor protection system shutdown function and dedicated output function.

[0091] System initialization ensures that the simulation body is configured according to the test requirements. Input test signal: The dedicated test device inputs the signal to the simulation body. Signal conversion: According to the test requirements, the signal conversion module converts the input signal into the required signal. Threshold comparison: The converted signal is compared with the threshold. If a high value comparison is performed, when the input signal is higher than the threshold, the threshold comparison module contact is energized; if a low value comparison is performed, when the input signal is lower than the threshold, the threshold comparison module contact is energized; Delay output: The delay module receives the output signal of the threshold comparison module. When the threshold comparison module contact is energized, the delay module outputs a dry contact closure signal after a delay of T. The delay T can be set in the range of 0.01 seconds to 9990 minutes. Relay action: The relay simulates the shutdown circuit breaker of the reactor protection system. The relay is connected to the delay output module. When the delay output module outputs a closed dry contact signal, the relay power circuit is connected, and the normally closed contact is reversed to a normally open contact, simulating the shutdown circuit breaker power failure disconnection state.

Claims

1. A reactor protection system test simulation body, characterized in that: It includes an input signal interface, a signal processing module, a threshold comparison module, a delay output module, a relay module, and an output signal B interface which are connected in sequence. The output signal A interface is arranged between the signal processing module and the threshold comparison module.

2. The reactor protection system test simulation body according to claim 1, characterized in that: The input signal interface is connected to a special test tool to input analog signals and switch signals. The analog signals include current signals, voltage signals, and resistance signals, and the switch signals include normally open and normally closed signals.

3. The reactor protection system test simulation body according to claim 2, characterized in that: The signal processing module processes and converts the received signal as required.

4. The reactor protection system test simulation body according to claim 3, characterized in that: Conversion types include: current signal conversion to voltage signal; voltage signal conversion to current signal; resistance signal conversion to current / voltage signal.

5. The reactor protection system test simulation body according to claim 4, characterized in that: The signal processing module outputs a voltage signal to the threshold comparison module, which is compared with the reference voltage. When performing a high-set value test, if the voltage value is higher than the reference voltage, the relay of the corresponding channel is energized and the LED light of the corresponding channel is turned on. When performing a low-set value test, if the voltage value is lower than the reference voltage, the relay of the corresponding channel is energized and the LED light of the corresponding channel is turned on.

6. The reactor protection system test simulation body according to claim 5, characterized in that: The delay output module includes an input relay and an output relay. The input relay is connected to the output relay of the threshold comparison module. When the output relay of the threshold comparison module is closed, the output relay of the delay output module is closed after the delay.

7. The reactor protection system test simulation body according to claim 6, characterized in that: The delay time is adjustable from 0.01 seconds to 9990 minutes.

8. The reactor protection system test simulation body according to claim 6, characterized in that: The delay output module has 31 working modes, as follows: 1: Inching mode, the switch is closed when there is a signal and disconnected when there is no signal; 2: Self-locking mode, the relay status flips once after each trigger; 3: After triggering, the relay is energized and disconnected after delay time A; the trigger is invalid during the delay period; 4: After being triggered, the relay is energized and disconnected after a delay of time A; the trigger will restart the timing during the delay period; 5: After being triggered, the relay is energized and disconnected after a delay of time A; the accumulated timing is triggered during the delay period; 6: After being triggered, the relay is energized and disconnected after a delay of A; the trigger resets during the delay period; 7: After triggering, the relay is energized during the duration of the signal, and the input signal disappears and disconnects after a delay of A; if the relay is triggered again during the delay period, it remains energized, and the timing stops until the last signal disappears, and disconnects after a delay of A; 8: After power is turned on, the relay is immediately closed and disconnected after a delay of A seconds until the next power is turned on; 9: Give the signal, and the relay will be closed after delaying for time A; 10: When a continuous signal is given, the relay is closed after a time of A; when the signal disappears, the relay is disconnected; when the signal disappears for a time of A, the relay is closed; when there is a signal, the relay is disconnected; 11: When a continuous signal is given and the time exceeds A, the relay is energized; when the signal disappears for more than A time, the relay is disconnected; 12: Give a continuous signal, and after exceeding time A, the relay is energized; give a continuous signal again, and after exceeding time A, the relay is disconnected; 13: When a signal is given, the relay closes for A seconds and then disconnects; when the signal disappears, the relay closes again for A seconds and then stops; 14: If there is a pulse signal, the relay is disconnected; if there is no pulse signal, the relay is closed after a delay of A time; 15: After power on, the relay is closed after a delay of time A until power off; 16: After power on, the relay closes for time A and opens for time B, in an infinite cycle; it stops when power is off; 17: With continuous signal, the relay is closed for time A and disconnected for time B, in an infinite loop; The signal disappears, terminating the loop; 18: Give a signal once, the relay will close for time A and disconnect for time B, and the cycle will continue indefinitely; give a signal again to terminate the cycle; 19: After power-on, the relay is closed after a delay of time A, and disconnected after a delay of time B; 20: Give a signal once, after a delay of A time, the relay is energized, and then disconnected after a delay of B time; 21: Give a continuous signal, after exceeding time A, the relay is energized, and disconnected after energizing time B; When the signal disappears, the timing is reset and the relay is disconnected; 22: When there is a signal, the relay will automatically disconnect after closing for A time, and then count for B time after disconnection. The signal trigger is invalid during the A+B time; 23: When there is a signal, the relay will automatically disconnect after it is energized for A time, and then it will count for B time after it is disconnected, and then it will automatically disconnect after it is energized for A time again; 24: No action when there is a signal; Trigger when the signal disappears; The relay is energized and disconnected after a delay of A time; 25: The signal disappears, the relay is energized after delay time A, and then the relay is disconnected after delay time B; 26: The signal disappears. After the disappearance exceeds the A time, the relay is energized; after the delay of the B time, the relay is disconnected; 27: After power-on, the relay is closed for A time and disconnected for B time; after C cycles, the relay disconnects and stops; 28: No action after power-on; after a signal is given, the relay is closed for A time and disconnected for B time; after C cycles, the relay disconnects and stops; If a signal is given, it will be executed again; 29: After the signal is given more than A times, the relay is energized; it remains energized; the power is cut off and the relay stops; 30: After the signal is given more than A times, the relay is energized; it is disconnected after being energized for B time; 31: Within C time, after the signal is continuously given for more than A times, the relay will be energized for B time and then disconnected and stop.

9. The reactor protection system test simulation body according to claim 6, characterized in that: The relay module simulates the reactor protection system's trip circuit breaker, and its output is a dry contact signal, which is consistent with the actual operation on site.

10. The reactor protection system test simulation body according to claim 1, characterized in that: The output signal A interface is connected to special test tools, oscilloscopes, and multi-purpose pens to verify the accuracy of the signal channel; the output signal B interface is connected to special test tools, oscilloscopes, and multi-purpose pens to simulate the reactor protection system shutdown function and dedicated output function.

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