JPH0582593B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a plant simulator suitable for carrying out plant operation training and at the same time training on failure diagnosis and repair techniques for various equipment constituting a plant interlock.

[Technical background of the invention and its problems] In order to operate large-scale complex plants such as power generation, electric power, steel manufacturing, and chemical plants safely and with high availability, it is necessary for operators to learn and improve their operating techniques. For this purpose, a plant simulator is provided.

FIG. 4 shows an example of a conventional plant simulator. The plant simulation device includes a simulation control panel 1 that simulates the control panel of an actual plant, an arithmetic control device 2 that performs plant simulation calculations, an instructor console 3, an input control device 4, an output control device 5,
It is composed of a simulated plant state storage device 6 that stores the plant state. With this configuration, signals accompanying operations of switches and the like by the trainee on the simulated control panel 1 are input to the arithmetic and control device 2 via the input control device 4 . These signals cause the arithmetic and control unit 2 to
simulates the dynamic characteristics of the plant and the behavior of logic such as plant interlock, stores it in the simulated plant state storage device 6, and transmits the calculation results from the output control device 5 to various lamps and indicators on the simulated control panel 1. etc., and the plant operating status was reflected on the simulated control panel 1. In addition, the instructor who instructs the operation outputs operation signals (accident simulation commands, etc.) from the instructor console 3 and checks detailed plant parameters associated with the operating state.

However, since conventional plant simulators are created solely for the purpose of plant operation training, problems such as malfunctions and malfunctions of equipment such as relays that make up the plant interlock housed in the actual plant control panel, etc. It was not possible to simulate the state of the phenomenon.

That is, in the control panel of a normal actual machine, various types of plant interlock circuits are housed in addition to instruments such as various meters, operation switches, and displays. FIG. 5 is a circuit diagram showing an example of such a plant interlock, and the operating switch 7 is located on the control panel. Relay 11 is energized by interlocking operation switch 7 and contacts 8, 9, and 10. For example, in a nuclear power plant, these contacts 8, 9, and 10 are relay contacts that operate when the reactor water level is low, relay contacts that operate when the dry well pressure is high,
These are relay contacts that operate at low reactor pressure. When the relay 11 is excited, the relay contact 11a becomes closed, and if the contact 12 is also closed, the lamp 13 lights up. This lamp 13 is installed on the panel of the actual machine control board, and the operator can confirm that the relay 11 is operating by checking the on/off state of this lamp.

However, in the plant simulation device, only the operation switch 7 and the lamp 13 are provided on the simulation control panel 1, and the status of other devices such as contacts and relays that make up the plant interlock is stored in the simulation plant status storage device. 6, the establishment or failure of the interlock is calculated by the arithmetic and control unit 2, and only the results are provided on the simulated control panel 1 and displayed on the lamp 1.
It is now reflected in 3.

For this reason, in conventional plant simulators, even if you try to simulate failure diagnosis of these devices, they do not actually exist, so it is difficult to simulate problems such as malfunctions and malfunctions of relays, etc. that make up the plant interlock housed in the actual plant control panel, etc. In response to this occurrence, training personnel were unable to conduct maintenance training in which they investigated, diagnosed, corrected, and repaired equipment that had malfunctions or malfunctions.

[Object of the Invention] In order to solve such problems, an object of the present invention is to provide a plant simulator that enables maintenance and diagnostic training of various devices such as relays that constitute a plant interlock. shall be.

[Summary of the Invention] The present invention inputs operation signals from a simulated control panel for operating a simulated plant and command signals from an instructor console to an arithmetic and control device to perform simulated calculations of the plant, and transmits the results to the simulated control panel. In a plant simulation device that enables plant operation training by outputting data to a computer, a simulated plant state memory stores failure states corresponding to numbers assigned to each plant interlock device based on instructions from an instructor console. A device, a removable simulated plant interlock device on the panel, a display that displays the number of the plant interlock device to identify the plant interlock device, and a device that changes the number displayed on the display. It is equipped with a push button and a check terminal for checking the failure state of the plant interlock device, and has a built-in device that stores the identified failure state of the plant interlock device based on the stored information from the simulated plant state storage device. The present invention is characterized in that it is equipped with an equipment failure simulating device having a circuit to set, and is capable of diagnosing failures of plant interlock equipment and simulating repairs.

[Embodiments of the Invention] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a configuration diagram of a plant simulator according to an embodiment of the present invention, and in the figure, the same reference numerals as in FIG. 4 indicate the same or corresponding parts. The configuration shown in Figure 1 differs from the conventional example shown in Figure 5 in that it is capable of diagnosing the failure of each device such as the relay coil, relay contact, and operation switch that make up the plant interlock installed on the simulated control panel 1. An equipment failure simulating device 20 is provided to perform the fault diagnosis of each equipment, and the instructor console 3 selects and instructs the failure of each equipment, stores it in the simulated plant state storage device 6, and uses the equipment failure simulator 20 to diagnose the failure of each equipment. The key point is that we have been able to conduct these tests one by one to find faulty equipment and repair it.

FIG. 2 is an external view showing an example of the device failure simulating device 20. As shown in FIG. In this example, the devices that can be fault-diagnosed are the relay coil and relay contacts that are installed on the actual machine control panel and constitute the plant interlock. Here, fault diagnosis is performed by dividing the relay into the coil and contacts because there are generally many contacts attached to one relay coil, and each of these is incorporated into a different plant interlock. This is because fault diagnosis is easier if the relay coil and relay contact, which are the constituent elements of each interlock, are examined in order.

On the panel 21 of the equipment failure simulator 20, a relay coil section 22 to be subjected to failure diagnosis and a relay contact section 23 are detachably provided. Check terminals 24a, 24b, 25a, and 2 are provided at the upper and lower portions of the terminals, respectively, for checking the malfunction status of the equipment.
5b is provided. Further, below these, there is a coil number display 26 and a contact number display 2 for displaying the number of the equipment to be diagnosed as described later.
7. A coil selection push button 28 for selecting the device, a contact selection push button 29, a coil number confirmation push button 30 and a contact number confirmation push button 31 for confirming the selected device are provided, respectively.

FIG. 3 shows a circuit diagram of the relay coil section 22, the relay contact section 23, and their peripheral circuits provided in the equipment failure simulating device 20. As can be seen from this circuit diagram, both the relay coil section 22 and the relay contact section 23 to be diagnosed are the coil 221,
231 and its contacts 222, 232, and short circuit wires 223, 233 for sending a parts replacement signal SA to the arithmetic and control device 2 when these are attached or detached from the panel 21 of the equipment failure simulating device 20.
It consists of The relay coil section 22 and the relay contact section 23 have contacts 20 of the relay coils 201 and 202, respectively, to put them into a failure state based on the command signal SB from the arithmetic and control unit 2.
3 and 204, and a selection signal SC for selecting them are connected in series between the power supply PN. Also, check terminals 24a and 24b of the relay coil section 22
are connected to both ends of the contact 203 and the coil 221, and check terminals 25a and 25b of the relay contact section 23 are connected to both ends of the contact 232, respectively.

With the above configuration, normal plant simulation operation is performed in the same manner as in the conventional example described above with reference to FIG. On the other hand, when conducting a simulation training for failure diagnosis of various plant interlock devices installed in the actual machine control panel, the instructor should use the instructor's console 3 shown in Figure 1 to identify the relay or contact that should cause the failure _.
and failure state U _M. In the example shown in FIG. 3, only one type of failure condition is shown: disconnection failure for the relay coil section 22 and open failure for the relay contact section 23, but for example, relay contacts that short-circuit check terminals 24a and 24b are connected in parallel. By doing so, it is possible to realize short-circuit failures in the relay coil section 22, and it goes without saying that various failure states of the equipment can be simulated in the same manner as in the actual equipment.

The relay coil or contact number U _S and failure state U _M are input from the input control device 4 to the arithmetic and control device 2, stored in the simulated plant state storage device 6, and also stored on the equipment failure simulation device 20 as described later. When the device with that contact number is selected,
The failure state U _M is output to the equipment failure simulation device 20.

If an instructor executes a plant simulation with the equipment failure condition specified in this way, a situation will occur where the plant interlock that should be established during the simulated operation process will not be established, and the progress of the plant control sequence will stop or the display that should be lit. Abnormal situations occur, such as a lamp not lighting up or a warning lamp lighting up. The trainer observes this condition and investigates the cause, and if it is determined that the cause is a failure of the plant interlock, the next step is to check the numbers of the devices that make up the interlock in order to diagnose which device is at fault. are sequentially input using the coil selection push button 28 or the contact selection push button 29 of the equipment failure simulating device 20. That is, when the coil selection push button 28 is held down, the number displayed on the coil number display 26 increases sequentially from 1. When the trainee looks at this display and releases his/her hand when the desired number is reached, the number stops increasing and the display blinks. Furthermore,
When the trainee sees this display and presses the coil number confirmation push button 30, this equipment number is read into the arithmetic and control device 2 via the input control device 4. As a result, the display becomes lit, and the device to be diagnosed is selected as the relay coil section 22 on the panel 21 of the device failure simulating device 20. The same applies to the relay contact portion 23.

In this way, when a device to be diagnosed as a relay coil portion 22 or a relay contact portion 23 is taken out on the panel 21 of the device failure simulating device 20, the failure is diagnosed by hitting the terminals 24a and 24b with a tester. . That is, relay coil section 2
To check the disconnection failure of 2, use equipment failure simulator 2.
0 by operating the switch (not shown) above
By setting SC as an open signal, 24a, 24b
Check the impedance between the two using a tester. At this time, the contact 20 determines whether the relay coil section 22 is disconnected or not.
3, and this is determined by the instruction from the instructor's console 3. That is, as described above, the failure state U _M of the equipment specified from the instructor console 3 is stored in the simulated plant state storage device 6. Therefore, when a device on the equipment failure simulating device 20 is selected, a failure simulating contact signal SB corresponding to the storage state of the simulated plant state storage device 6 is applied from the output control device 5 to the equipment failure simulating device 20. As a result, if the device selected on the device failure simulating device 20 is a device designated as failure by the instructor, the failure simulation contact signal SB becomes a closed signal,
Relay coil 201 is excited and contacts 203 are opened. On the other hand, if the device selected on the device failure simulator 20 is not the device designated by the instructor, the failure simulation contact signal SB becomes an open signal, the relay coil 201 is de-energized, and the contact 203 is closed.

The trainer sequentially takes out each piece of equipment constituting the abnormal plant interlock onto the equipment failure simulator 20 and diagnoses the failure.
As a result, if a faulty device is found, the relay coil section 22 is removed from the panel 21 and a similar relay coil section 22 prepared separately is inserted. Then, a parts replacement signal SA is generated and input to the arithmetic and control unit 2. As a result, the arithmetic and control unit 2
determines that the equipment selected on the equipment failure simulator 20 has been replaced with a normal one, and corrects the previously stored equipment failure state to a normal state according to a command from the instructor console 3 and stores it.

The above is an explanation when the device selected on the device failure simulator 20 is a relay coil.
The diagnosis method is almost the same for relay contacts.
However, in the case of a relay contact, by making the container of the relay contact part 23 partially transparent and arranging the contact 232 in it so that it can be seen from the outside, it becomes possible to visually diagnose the failure as in the actual machine.

The configurations of the relay coil section 22, the relay contact section 23, and their peripheral circuits are not limited to those shown in FIG. 3, and can be modified as appropriate. For example, if the method for diagnosing equipment failures differs from that of the actual equipment, the relay coil section 22 and relay contact section 23 may be configured with a display that simply displays normal and abnormal conditions, or even a CRT display may be used to display all It is also possible to perform soft processing.

In this way, it is possible to simulate failure diagnosis of plant interlock equipment, which allows trainees to quickly respond not only to plant abnormalities but also to control panel equipment failures. By learning detailed plant operation techniques, you will be able to operate the plant more safely.

[Effects of the Invention] As described above, according to the present invention, by providing an equipment failure simulating device that simulates the failure of equipment similar to relays, contacts, etc. used in actual machine interlocks, it is possible to By generating a simulated failure signal, it is possible to train plant operation trainees to investigate and diagnose malfunctions in equipment, and to perform repairs after an abnormality using procedures similar to the actual machine, providing realism through training for responding to plant failures. This makes it possible to conduct plant operation training more effectively based on actual equipment.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram of a plant simulator according to an embodiment of the present invention, Fig. 2 is an external perspective view showing an example of the equipment failure simulator shown in Fig. 1, and Fig. 3 is a circuit configuration of the equipment failure simulator. 4 is a configuration diagram of a conventional plant simulator, and FIG. 5 is a circuit diagram showing an example of a plant interlock provided in an actual machine control panel. 1... Simulated control panel, 2... Arithmetic control device, 3...
...Instructor console, 4...Input control device, 5...
...Output control device, 6... Simulation plant state storage device, 20... Equipment failure simulation device.

Claims (1)

[Claims] 1. Operation signals from a simulated control panel for operating a simulated plant and command signals from an instructor's console are inputted to an arithmetic and control device to perform simulated calculations of the plant, and the results are sent to the simulated control panel. In a plant simulation device that enables plant operation training by outputting data, a simulated plant state storage device stores failure states corresponding to numbers assigned to each plant interlock device based on instructions from an instructor console. On the panel, there is a removable simulated plant interlock device, a display that displays the number of the plant interlock device to identify the plant interlock device, and a push button to change the number displayed on the display. It is equipped with a button and a check terminal for checking the failure status of the plant interlock equipment, and has an internal setting for setting the failure status of the identified plant interlock equipment based on the stored information from the simulated plant status storage device. 1. A plant simulator comprising: an equipment failure simulator having a circuit for diagnosing and simulating repair of a failure in plant interlock equipment.