JPS58121410A - Fault display for power plant - Google Patents

Abstract

PURPOSE:To obtain a compatible fault display circuit and to give a display system flexibility in alternation, extension, etc., by interrupting a fault detection signal corresponding to a fault occurring newly. CONSTITUTION:When a contact for circuit closure in a falt detection contact group 1a is operated firstly, a detecting circuit 18 and a detecting circuit 19 generate outputs. A gate circuit 20 generates a fault detection signal (i) lagging said outputs. The signal (i) is inputted to an ANN circuit 5a and a holding circuit 21 generates and holds an output. On receiving it, an output circuit 24 sends out a lamp flashing output and an alarm output. Once an operator presses a confirmation button after confirming the genertion of the display and alarm outputs, a signal K is inputted. Then, a holding circuit 23 operates to hold the output. The output circuit 24 receives the output to generate a successive display signal as a lamp display signal l while interrupting the alarm signal (b).

Description

Detailed Description of the Invention Technical Field The present invention relates to an abnormality display device in a power generation plant. The present invention relates to an abnormality display device for a fuden plant, which is suitable for displaying all at once.

Technical Background of the Invention In thermal and nuclear power plants, when an abnormal situation such as an accident occurs, it is essential to quickly and accurately identify the abnormality. monitors the power plant by installing abnormality indicators corresponding to the abnormality detection contacts placed in each part of the power plant. However, since a large number of Hiro abnormality detection class points dE are arranged over a wide range in a power plant, if abnormality indicators were provided in one-to-one correspondence with the abnormality detection contacts, the number of indicators would be enormous. , practicality is lost due to installation space and monitoring work. For this reason, an abnormality indicator is installed for each important item, but for abnormality detection contacts with a relatively low level of importance, for example, they are placed in a group for each on-site Il system, and one indicator is installed. I am trying to display them all at once.

FIG. 1 shows a conventional example of such an abnormality display device, in which 1a*1k...a group of abnormality detection contacts are grouped, 2a, gb... are individual abnormality detection contacts, 3m,
3 b =・ is a re-failure detector, 4 is a collective display type anomaly display device, 5 m $ 5 b ”・F1 is an abnormality display route with a re-failure display, 6Fi is an individual type anomaly display device, 7 m, 7b
... is an abnormality display circuit, 8 hatake, s b-..., 9m,
9b... is a rung indicator, 10 is an 11-axis sushi, 11 is a confirmation button, 12 is a reset button, 13 is a blinking signal circuit, and P is a signal DC power supply.

In the above configuration, in the case of individual display, for example, when the abnormality detection contact 2a is closed, the p1 abnormality display circuit 7a is activated, and the lamp display 99m flashes with its display output. At time P1, the alarm lO sounds with the alarm output of the abnormality display circuit 7a. The operator took it 1i
When the llL% confirmation button 11 is pressed, the lamp indicator 9 will be lit continuously and the alarm will stop.

If the abnormality returns to normal, the abnormality detection contact 2a will open, and if you press the reset button 12, the rung display 99 will appear.
Turn off the ai; At this time, if the abnormality continues, even if the reset button 12 is pressed, the rung indicator 9a remains lit at 11.

Next, in the case of collective display, if even Ill in the abnormality detection contact group 1a is closed, the re-abnormality detector 3& will generate an output, and the abnormality display circuit 51 with re-abnormality display will operate. 1 with lamp display 68m and alarm 1o as above
1 report display operation is performed. While this rung indicator 8a is continuously displaying, if another contact in the abnormality detection contact group la is closed, the abnormality reoccurrence is outputted using another signal line of the abnormality detector aaFi, and the abnormality reoccurrence is output again. The abnormality display circuit 5 with abnormality display is operated again to change the lamp display 81 from continuous display to blinking display again. At the same time, the alarm 1o is made to sound again. The operator □ can see one lamp indicator 8a and know that another abnormality has occurred in that equipment system.

Problems with the Background Art However, in the conventional configuration as described above, two signal lines are required, for example, between the re-abnormality detection 53m and the abnormality display circuit with re-abnormality display 51 in order to collectively display the abnormal locations. Become. That is, one is a signal line 14m for transmitting that one or more contacts in the abnormality detection contact group 1'a are closed, and the other one is a signal line 14m for transmitting that one or more contacts in the abnormality detection contact group 1'a are closed. This is a signal #15m that transmits a signal that is generated only for a short time each time a contact closes.

In this case, the abnormality detection contact group 1m, lb... and the re-abnormality detection ass, sb... butterfly are usually installed in field equipment at a distance (for example, several 100 points+) from the central control panel. In addition, there are more than several hundred runner # indicators 8m, 8b-..., 9m+9b" placed on the central control panel. Of these, the rung indicators 8m and 8b for - finger display have about 11% of the legs, and in the future,
It tends to increase as the plant scale increases.

Therefore, according to the conventional configuration described above, each run f display is 8 m long.
, 8b... requires two signal lines each, which increases the number of cables laid over long distances and increases construction costs.Furthermore, abnormality display devices are available in individual and batch display types. Two types are required, and they are not compatible, so when changing the display method, a combination point will occur that will complicate the work.

OBJECTS OF THE INVENTION The present invention reduces the conventionally required two signal lines for batch display to one signal line each, thereby reducing the number of lines and allowing for individual and batch display.

Make the abnormality display circuit of the shape compatible, change the display method,
It is an object of the present invention to provide an economical and rational power generation ground abnormality display device that can flexibly deal with expansion parts.

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a system for temporarily suspending the abnormality detection signal when a new abnormality occurs while the abnormality detection signal is being sent from the re-anomaly detector installed in the field. By doing so, a single signal is used to detect the occurrence of an abnormality.F) While the abnormality occurrence is transmitted to the central control panel, the abnormality display device installed in the central control panel detects a momentary interruption of the abnormality detection signal sent. The present invention is characterized in that the abnormality display operation is repeated from the beginning each time.

Examples of the invention The present invention will now be described with reference to embodiments shown on one page.

No. 253 is a power generation plant OJ according to an embodiment of the present invention!
This is a professional diagram of a constant display device.

In the figure, the same reference numerals as in Figure 1 indicate the same or monk parts, and the difference from Figure 1 is that the abnormality indication direction with re-abnormality indication is 5 m.
, 5 b = (hereafter simply trace circuit 5 a a 5
Described as b... ) and abnormality display circuit 7m, 7b=・
(hereinafter simply referred to as ANN1gl circuit 7m circuit 7b-) are made to be compatible by using modules with the same structure, and are collectively stored in the same case 16 of the central control panel. 3m of each re-abnormality detector placed in the center
.

One signal line 17a connects each electric circuit 5m, 5b... placed in the central control panel at a considerable distance from 3b...
*17b... is the point connected.

Figure 3 shows each hJ4 regular detector 3at3t+ in Figure 2.
-・, Munn-ro 5m, 5b-, Mu Temple Circuit 71° 7b・
In order to explain the internal configuration of..., the re-abnormality detector 3a, the ANN circuit 5m, and the failure circuit 7a are shown as representatives of each.

The reference numeral 18 in the abnormality detector 3a is a detection circuit for batch signals, and has a logical sum function that always outputs if one or more inputs in the contact group 1a are connected.

Reference numeral 19 denotes a detection circuit for individual generation, which is a path that outputs an instantaneous (approximately 0.5 second) output every time any one of the contacts in the contact group 1 closes.

This is a circuit (f-) that opens and closes the output of the 20 failure detection circuit 18, and outputs an abnormality detection signal 1 that is instantaneously cut off every time the detection circuit 18 outputs.

・On the other hand, 21 in Muzu circuit 5m, 7alC is a holding circuit that memorizes the occurrence of an abnormality. ・It is activated by the input of the abnormality detection signal amount, and after the abnormality detection signal amount is cut off, the reset button 1 in Fig. 2 is pressed.
This is a circuit that holds the output in the trench where the reset and reset signals T generated by pressing 2 enter.

Reference numeral 22 denotes a zf pulse converting sub-circuit, which outputs a pulse every time the abnormality detection signal 1 is generated.

23 is a holding circuit for continuously displaying 27/, which generates an output by inputting the confirmation signal generated by pressing the confirmation button 11 in FIG. 2 when there is an output from the holding circuit 21; This circuit holds the output until the output of the hold 1 path 21 is cut off or the Δ pulse conversion circuit 2240 outputs a pulse.

24 is an output circuit which receives the blinking signal f generated from the blinking signal circuit 13 in FIG.
1 is an output, and when the holding circuit 23 stops outputting, the flashing signal f
This is a circuit that outputs a lamp to blink and make a buzzing sound, and when the outputs of both holding circuits 21 and 23 change, the alarm signal is stopped, while the lamp display signal t is made into a continuous signal.

ANN IJ paths 5m and 7m are connected to each of the above-mentioned circuits and each of the above-mentioned signals.
# Terminal 5 for inputting and outputting b eIl eKe&e
It is constructed using the same module with both F@LzB. However, in the case of the ANN circuit 5a, as shown in the figure, the Itli child of that module! ■ The terminal is connected in advance and used. Next, the operation of the abnormality display device of the main business embodiment configured as above 1 will be explained with reference to the time chart shown in FIG. 4.
I will clarify.

Among the abnormal horizontal contact group 1m, the contact that closes first is A1.
When inputted manually, the detection circuit 18 emits an output, and the detection circuit 19 also outputs t! eP-) which emits a temporal output of time.
Circuit 20 #'i41 Human power also generates an abnormality detection signal amount after t1 time. The signal is input to the company S company ANN circuit 5a, and the hold circuit outputs -2'1 and is held. Output circuit 24
In response to this, it emits a flashing lamp output and an alarm output. The above relationship is consistent with the time chart shown in Figure 5.

After confirming these displays and warning occurrences, the operator presses confirmation button 11.
When you press , the signal k is input, and the holding circuit 23 is connected to the holding circuit 21.
It works because there is an output and retains the output. Upon receiving the output, the output circuit 24 runs! The display symbol t is used as a continuous display signal, and the alarm signal stops.

In this state, even if A1 continues to use manual power, failure detection b3 will occur again.
The output of a continues, and when you press the reset button 12,
Even when the reset signal r is input, the holding circuits 21 and 23 hold their outputs as they are, and the rung display signal L+visual report signal S does not change.

In this state, when another contact A2 in the contact group 1m closes, re-abnormality detection 93 a Id is received and detected (b)
The r-t circuit 19 temporarily (fkl at is) outputs to operate the r-t circuit 20, and the r-t circuit output is cut off for 11 hours. After 11 hours have elapsed, the goo circuit 20 outputs the output again, so the abnormality detection signal 1 becomes a signal that the output of A2 was momentarily interrupted for 11 hours due to manual power.

The electric circuit 5a operates as follows according to this signal.
That is, when the signal amount is cut off, the output of the first holding path 21 does not change, and therefore the other one path does not change as well, and the lamp display signal t is a continuous signal.

When the signal amount enters again after 11 hours, the pulse generator 22
operates, and the pulse output enters the holding circuit 23 as an input. With this input, the extended holding of the holding circuit 23 is released, and the output is cut off. At this time, the holding circuit 21 is in an output holding state, and since the input is input, the output does not change and remains in the output state.

Since the input state of the output N path 240 is the same as the failure occurrence condition, the lamp display signal t becomes a blinking signal and an alarm signal is also generated.

During this operation, the operator can monitor the lamp indicator 8a as a pattern indicator to confirm that there is no re-&J in the group.
! You can confirm that something has happened. Therefore,
When the 1iIil signal k is input by pressing the confirmation button 11, the hold 1 path 23° is activated, the output circuit 24 makes the rung display signal 1 a continuous signal, and the **signal bFi is stopped.

When the abnormality is recovered and the contacts of A1 and A2 are connected,
If the reset button 12 is not pressed, the lamp indicator 8 will display tl continuously, but if the reset button 12 is pressed and the reset signal r is input, the holding path 21 will be released from the extended holding state and the output will not be cut off. Therefore, the output of the holding circuit 23 is also cut off. In response to this, the output circuit 24 cuts off the lamp display signal t and turns off the lamp display 8m. This will return to the original state before the abnormality occurred.

In this manner, according to the embodiment of this collection, the abnormal state at the site and the newly occurring re-abnormality are detected from the re-abnormality detector 3a to the AN.
One signal amount ty4 can be transmitted to the NQ path 5a. Furthermore, on the central control panel side, an ANN line 5 am 7 m is constructed using module crystals having the same structure. As a result, cable installation, single-shot circuit manufacturing work, etc. can be simplified, costs can be reduced, and the number of abnormality detection contacts can be increased.
Changes can be made to ANN circuit failures, for example, by converting the module crystals in the case from individual display to batch display, or by using a spare module. I will be able to do it.

FIG. 5 shows another embodiment of the re-abnormality detector 3a. ! The r-) circuit 20 inside the abnormality detector 3 is configured with an auxiliary relay.
) The functions are the same.

In the configuration shown in Fig. 5, 25 and 26 are auxiliary relays, 25m is the a contact of the auxiliary relay 25, and 26b is the b contact of the auxiliary relay 26.
It is a point of contact. The other symbols are the same as those of the re-abnormality detector shown in Figure #IJ3, so their explanation will be omitted.

In this case, the signal i is the same tkfi turtle 1 as the fault detection contact.
Offered by stp. To describe only its P-) & active operation, when there is no output from the detection circuit 18, the relay 25
．． 26Fi, inactive, signal 1 is cut off, and when there is an output from the detection circuit 18, relay 26 is activated every time the detection circuit 19 operates.
operates temporarily and cuts off signal 1.

Figure 6 shows another embodiment of the AloJ circuit.
111311, the output of the N path 22 inside the jIINN (b) path is passed through the switch 27, and when the switch 27 is closed, it is the same as the collective display type ANN circuit 5at)@function. When the switch 27 is set to 9, it has the same function as the individual ANN circuit 7a.

By closing the switch 27, the function can be used both for pattern display and individual display, increasing convenience in terms of compatibility.

In the above embodiment, the lamp indicator is used to generate power (f run) KJ! An example of making the light blink every time a fault occurs, then turning it on continuously by pressing the ** button, and then turning it off by pressing the reset button after returning to normal.I! As mentioned above, the display format can be changed as desired, such as red for alarm, yellow for confirmation, and green for normal status.

Effects of the Invention As described above, according to the present invention, it is possible to reduce the number of connection cables laid between the site of the power plant and the central control room, reduce the construction cost, and also Circuit-wise, abnormality display circuit for display and individual display.
Modules with structurally identical content can be used,
This reduces production costs and provides compatibility. Therefore, it is possible to flexibly deal with changes in display contents, additions, circuit failures, etc. after the abnormality display device has been put into operation, and an economically reasonable abnormality display device for power generation units can be obtained.

[Brief explanation of the drawing]

FIG. 1 shows a professional and practical diagram of a conventional abnormality display device, FIG. 2 shows a data diagram of an abnormality display device according to an example of the present invention, and FIG.
4 is a time chart for explaining its operation. FIG. 5 is a detailed circuit diagram of a re-abnormality detector according to another embodiment of the present invention. FIG. FIG. 3 is a detailed circuit configuration diagram of a failure indicating circuit according to another embodiment of the present invention. 1m, 1b... Abnormality detection contact group, 2m, 2b... Abnormality detection contact, 3m, 3b... Re-abnormality detector, 4...
Bulk display type abnormality display device, 5m, 5b... Validity display circuit with re-abnormality display, 6... Individual type abnormality display device, 7a
. 7 b-J! Normal display circuit, 8m, 8b r 9m'
, 9b--Rung indicator, 10--Alarm, 11
... Confirmation button, 12... Reset button, 13-... Flashing signal circuit, 141s14b. 15as15b-17m-17b”・Signal-116-・
・Case, 18... Detection channel for bulk signal, 19-...
Detection path for individual generation, 21.23...Holding circuit, 22
. . . falsification circuit, 24 . . . output circuit, 25.2
6... Auxiliary relay, 25a... Auxiliary relay a contact,
26b...B contact of auxiliary relay・Figure 4Figure 5Figure 6

Claims (2)

[Claims] (1) The operating status of the numerous abnormality detection contacts placed on the power generation unit f') is displayed in individual prints for each abnormality detection contact on each display placed on the central control vehicle side. Abnormality detection contact group Daru! In the abnormality display device of the power generation unit that displays the power generation unit at once every While installing a re-abnormality detector that instantly cuts off the output every time the abnormality detection contact operates,
On the central control room side, whenever the output from the abnormality detector is received and the output is cut off, the display changes to the 10th display state, and when the confirmation button is pressed, the display changes to the 20th display state. An abnormality display device for power generation plan F, characterized in that an abnormality display road is provided. (2) In the description of Paragraph 1 of 41 Claim OIIIm,
Same as the above-mentioned abnormality display circuit (power generation plan characterized by being configured using a wire)
OJI always displayed ILi.