JPS61221778A - Plant simulator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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 in failure diagnosis and repair techniques for various devices 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 a 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,
It is composed of an output control device 5 and 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 .

Based on these signals, the arithmetic and control unit 2 performs simulation calculations on the dynamic characteristics of the plant and the behavior of logic such as plant interlocks, stores them in the simulated plant state storage device 6, and outputs the calculation results from the output control device 5 to the simulation control panel. The plant operation status was reflected on the simulated control panel 1 by displaying it on various lamps, indicators, etc. on the 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 plant interlocks housed in actual plant control panels, 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 operation switch 7 is located on the control panel. The relay 11 is energized by the interlock between the operating switch 7 and the contacts 8°9.10. These contacts 8, 9, 10 are, for example, in a nuclear power plant, a relay contact that operates when the reactor water level is low, a relay contact that operates when the dry well pressure is high, a relay contact that operates when the reactor water level is low, and the like. Relay contact 11a becomes closed state when relay 11 is energized, and contact 1
2 are in the closed state at the same time, 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 simulated control panel 1, and the status of other devices such as contacts and relays that make up the plant interlock are stored in the simulated plant status memory. 6, establishment or failure of the interlock is calculated by the arithmetic and control unit 2, and only the result is provided on the simulated control panel 1 and reflected on the lamp 13.

For this reason, in conventional plant simulators, even if you try to simulate failure diagnosis of these devices, they do not actually exist.
When a phenomenon such as a malfunction or malfunction occurs in a relay that constitutes a plant interlock housed in an actual plant control panel, etc., a trainer conducts an investigation 1 diagnosis of the equipment in which the malfunction or malfunction has occurred. It was not possible to carry out maintenance training to correct or repair the problem.

[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 2 diagnosis training of various devices such as relays that constitute a plant interlock. shall be.

[Summary of the Invention] The present invention configures various devices constituting a plant interlock with hardware similar to the actual machine or something similar thereto, and provides means for causing failures in the various devices based on commands from the instructor's console. A feature of this system is that after a failure occurs, trainees can carry out maintenance training by conducting failure investigation 1 diagnosis and repair using the same procedures as in an actual plant.

[Embodiments of the invention] Embodiments of the present invention will be described below 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 FIG. 1 differs from the conventional example shown in FIG. 5 in that the relay coil, relay contact, and
An equipment failure simulation device 20 is provided for diagnosing failures of each device such as operation switches, and the instructor console 3 selects and instructs the failure of each device, and stores it in the simulated plant state storage device 6, thereby simulating equipment failures. The simulator 20 sequentially diagnoses the failure of each piece of equipment so that a faulty piece of equipment can be found and repaired.

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

Therefore, it is easier to diagnose the failure by sequentially examining the relay coil and relay contact, which are the components of each plant interlock.

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 are provided at the upper and lower portions of each for checking the failure state of the equipment.
, 24b, 25a, and 25b are provided.

Furthermore, below these are a coil number display 26 and a contact number display 27, which display the number of the device to be diagnosed as described later. Coil selection push button 28 for selecting the device, contact selection push button 291, coil number confirmation push button 30 for confirming the selected device, contact number display button 3
1 is provided for each.

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, the relay coil section 22 and relay contact section 23 to be diagnosed are both composed of relays consisting of coils 221 and 231 and their contacts 222 and 232, and these are connected to the equipment failure simulator 2.
Short-circuit lines 223 and 233 are provided on the panel 21 of 0 for sending a component replacement signal SA to the arithmetic and control unit 2 when the component is attached or detached. This relay coil section 22. Relay contact part 2
3 has a relay coil 201 for putting these into a failure state based on the command signal SB from the arithmetic and control device 2.
, 202 and a selection signal SC for selecting them are connected in series between the power supply PN.

In addition, a check terminal 24a of the relay coil section 22,
24b is at both ends of the contact 203 and the coil 221, and check terminals 25a and 25b of the relay contact section 23 are at the contact 2.
32, 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 carrying out a simulation training for failure diagnosis of various plant interlock devices installed in an actual machine control panel, the instructor specifies the number Us of the relay or contact to be caused to fail from the instructor console 3 shown in FIG.

Specify the failure state Uμ. 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 the 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.

This relay coil or contact number Us and fault status Uu
is input from the input control device 4 to the arithmetic control device 2 and stored in the simulated plant state storage device 6, and when the device with that contact number is selected on the device failure simulating device 20 as described later, the failure is displayed. The status Uu is output to the device failure simulation device 20.

If the instructor executes the 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.
Abnormal situations occur, such as a plant control sequence stopping, an indicator lamp that should be lit 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 obtain 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 pushbutton 28 is held down, the coil number display 26
The numbers displayed will increase sequentially starting 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. Further, 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 turns on, and the device to be diagnosed is displayed on panel 2 of the device failure simulator 20.
1 as the relay coil section 22. 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, in order to check for a disconnection failure in the relay coil section 22, operate a switch (not shown) on the device failure simulator 2o to open the signal sc in FIG.
Check the impedance between 4b using a tester. At this time, whether or not the relay coil section 22 is disconnected is determined by the open/closed state of the contact 203, and this is determined by the instruction from the instructor console 3. That is, as described above, the failure state UM 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 2°. As a result, if the device selected on the device failure simulating device 2° is a device designated as a failure by the instructor, the failure simulation contact signal SB becomes a close signal, the relay coil 201 is energized, and the contact 203 is opened. .

On the other hand, if the device selected on the 1-device failure simulator 2o is not the device specified by the instructor, the failure simulating contact signal SB becomes an open signal, and the relay coil 201 is de-energized and the contact 203
is closed.

The trainer sequentially takes out each device constituting the plant interlock that has become abnormal in this manner onto the device failure simulator 20 and diagnoses the failure. As a result, if a faulty device is found, remove the relay coil section 22 from above the panel 21 and use a similar relay coil section 2 prepared separately.
Insert 2. Then, a parts replacement signal SA is generated and input to the arithmetic and control unit 2. As a result, the calculation side-control device 2 determines that the device selected on the device failure simulating device 20 has been replaced with a normal one, and changes the device failure state previously stored by the instruction from the instructor console 3 to normal. Modify and store the status.

The above description is for the case where the device selected on the device failure simulating device 20 is a relay coil, but the diagnosis method is almost the same in the case of a relay contact. 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 is different from the actual equipment.

The relay coil section 22 and relay contact section 23 are simply normal.

It can be configured with a display that only displays abnormalities, or even a CRT.
It is also possible to apply a display and perform processing that is further softened.

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 failures of equipment similar to relays, contacts, etc. used in actual machine interlocks, it is possible to arbitrarily change the situation from the instructor's console. 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... Simulated plant state storage device, 2o
...Equipment failure simulation device. Figure 7 Figure 2 Figure 4

Claims (1)

[Claims] Operation signals from a simulated control panel that operate the simulated plant and command signals from the instructor's console are input to the arithmetic and control unit to perform simulated calculations of the plant, and the results are output to the simulated control panel to operate the plant. In a plant simulation device that enables training, means for selecting and specifying a failure of each device constituting a plant interlock from an instructor console, a means for storing the status of each of the devices, and a means for selecting and specifying the status of each device. The present invention is characterized by comprising a means for reading out the state of each device read out, and a means for diagnosing and repairing the fault by examining the read status of each device, thereby making it possible to conduct maintenance diagnosis training for each device constituting the interlock. Plant simulator.