JPH0682435B2 - Power plant abnormality display device - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to an abnormality display device for a power plant, and in particular, grouping a plurality of abnormality detectors arranged in the power plant,
The present invention relates to a power plant abnormality display device suitable for collectively displaying abnormal points in a power plant for each group.

[Technical background of the invention] In a power plant such as a thermal power plant or a nuclear power plant, when an abnormal situation such as an accident occurs, it is necessary to quickly and accurately grasp the abnormal place. Therefore, the central control panel has a power plant. An abnormality indicator is provided corresponding to the abnormality detector arranged in each part to monitor the abnormality. However, since a large number of abnormality detectors are arranged in a wide range in a power plant, if the abnormality detectors are provided in a one-to-one correspondence with the abnormality detectors, the number of indicators becomes enormous, and the arrangement space is large. , It becomes impractical in terms of monitoring work. For this reason, an abnormality indicator is provided for each important one, but for anomaly detectors of relatively low importance, for example, a group for each field equipment system should be grouped and displayed on one indicator at a time. ing.

Fig. 5 shows a conventional example of such an anomaly display device. 1a, 1b, ... are anomaly detector groups, 2a, 2b, ... are individual anomaly detectors, 3a, 3b, ... Re-abnormality detector, 4 batch display type error display device, 5a, 5b batch error display circuit with re-error display function, 6 individual error display device, 7a, 7b, ... individual error display circuit, 8a , 8b, ..., 9a, 9b, ... Are lamp indicators, 10 is an alarm device, 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 the individual type display, the individual abnormality display circuit 7a is operated by closing the individual abnormality detector 2a, for example, and the lamp display 9a blinks and displays with the display output. At the same time, the alarm output from the individual error display circuit 7a
Sounds. When the operator confirms this and presses the confirmation button 11, the lamp indicator 9a is continuously turned on and the alarm is stopped. When the error returns to normal, the individual error detector 2a opens and the reset button 12 is pressed to display the lamp indicator.
9a goes off. At this time, if the abnormality continues, even if the reset button 12 is pressed, the lamp display 9a remains lit continuously (this operation is called a manual reset type).

Next, in the case of collective display, for example, if even one of the abnormality detector groups 1a is closed, the re-abnormality detector 3a generates an output, and the collective abnormality display circuit 5a operates, which is exactly the same as above. Then, the alarm display operation is performed by the lamp display device 8a and the alarm device 10. When this lamp indicator 8a is continuously displaying, if another contact in the anomaly detector group 1a is closed, the re-anomaly detector 3a uses another signal line to output the anomaly reoccurrence. The abnormality display circuit 5a is restarted to change the lamp display 8a from the continuous display to the blinking display again. At the same time, the alarm device 10 is reactivated. This allows
The operator can know from the one lamp indicator 8a that another new abnormality has occurred in the equipment system.

[Problems of Background Art] However, in the above-described conventional configuration, for example, two signal lines are required between the re-abnormality detector 3a and the collective abnormality display circuit 5a in order to perform collective display of abnormal locations. Become. That is, one is a signal line 14a for transmitting that one or more contacts in the abnormality detector group 1a are closed,
The other one is a signal line 15a for transmitting a signal generated for a short time each time the abnormality detectors in the abnormality detector group 1a are closed.
Is.

In this case, the abnormality detector groups 1a, 1b, ... And the re-abnormality detectors 3a, 3b, .. are usually installed in the field equipment at a considerable distance (for example, several hundreds of meters) from the central control panel. Also, the lamp indicators 8a, 8b, ..., arranged on the central control panel
9a, 9b, ... have several hundred points or more. Of these, about 10% of the lamp indicators 8a, 8b, ... For collective display are present, and the number of lamp indicators 8a, 8b, ...

Therefore, according to the conventional configuration described above, each lamp indicator 8a, 8
Since two signal lines are required for b, ..., the external wiring differs between the individual type and the collective display type as the abnormality display device, and the internal abnormality display circuit also differs. In order to do so, two types are required, and since there is no compatibility, there is a problem that the work becomes complicated when changing the display method.

[Object of the Invention] The present invention enables a batch abnormality display circuit and an individual abnormality display circuit to be compatible with each other with a minimum necessary circuit configuration, and enables a collective abnormality display including re-abnormality by a manual recovery method. With the manual recovery method, the collective error display including re-errors can be flexibly dealt with by changing the mutual display method between batch display and individual display and adding a re-error detector. An object of the present invention is to provide an abnormality display device for a power plant.

[Summary of the Invention] In order to achieve this object, the present invention is directed to a plurality of abnormality detector groups each including a plurality of individual abnormality detectors 2a arranged on the site side of a power plant and those similar to the abnormality detectors. 1a, a collective signal detection circuit 18 that outputs an abnormality detection signal only while one or more abnormality detectors in the abnormality detection connector group 1a are operating, and a collective signal detection circuit 18 that outputs the abnormality detection signal. While holding the abnormality detection signal, the collective signal holding circuit 22 that is reset by the input of the reset signal r from the central control room side in the state where the abnormality detection signal is not input, and the abnormality detector group 1a Individual generation detection circuit that outputs a pulse signal each time the anomaly detector operates
A re-abnormality detector disposed on the site side, which is composed of 19 and a gate circuit 20 that outputs the abnormality detection signal output from the collective signal holding circuit 22 to the outside as it is only when the pulse signal is not being input. 3a, abnormality detection signal input terminal I, reset signal input terminal R, and confirmation signal input terminal K
And the changeover switch 25 that switches between the automatic recovery operation contact a and the manual recovery operation contact b, and the abnormality detection signal i input to the abnormality detection signal input terminal I, while the changeover switch 25 automatically recovers. When the confirmation signal holding signal is input in the state of switching to the contact a side, whether the abnormality detection signal i has already been cut off, or thereafter the abnormality detection signal i
When the confirmation signal holding signal is input in the state where the changeover switch 25 is switched to the manual reset operation contact point B side, the abnormality detection signal i is already cut off. After that, when the abnormality detection signal i is cut off and the reset signal r is further input, the abnormality detection signal holding circuit 21 that releases the holding of the abnormality detection signal i and the holding output from the abnormality detection signal holding circuit 21 A confirmation signal holding circuit 23 that holds the confirmation signal k input to the confirmation signal input terminal K and outputs the confirmation signal holding signal;
An output for inputting the holding output from the abnormality detection signal holding circuit 21 to output the first display signal, and in this state, inputting the holding output from the confirmation signal holding circuit 23 and switching to the second display signal for output. An anomaly display circuit 5a which is composed of a circuit 24 and is arranged on the side of the main control room.
5a is connected to the re-abnormality detector 3a in a state in which the changeover switch 25 is switched to the automatic recovery operation contact point a side,
It is characterized in that the changeover switch 25 is connected to the individual abnormality detector 2a in a state where the changeover switch 25 is switched to the manual return operation contact point side.

Embodiments of the Invention The present invention will be described below with reference to embodiments shown in the drawings.

FIG. 1 is a block diagram of an abnormality display device for a power plant according to an embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 5 indicate the same or corresponding portions, and the difference from FIG. 5 is that the collective abnormality display circuits 5a, 5b ,.
Circuits 5a, 5b, ...) is a general-purpose module used as an abnormality display circuit, and its changeover switch is switched to the automatic recovery operation contact side to provide an automatic recovery function. The ANN circuits 5a, 5b, ... and the individual abnormality display circuits 7a, 7b ... (hereinafter simply referred to as ANN circuits 7a, 7b, ...) are made compatible by using modules of the same structure. The anomaly detectors 3a, 3b, ..., which are housed together in the same case 16 of the control panel and arranged on the site side
Is connected to each ANN circuit 5a, 5b, ... arranged on the central control panel with a considerable distance from each other by one signal line 17a, 17b, ..., and the reset signal r is applied to the re-abnormality detector 3a. , 3b, ... is connected.

FIG. 2 shows the re-abnormality detectors 3a, 3b, ..., AN in FIG.
In order to explain the internal configuration of the N circuits 5a, 5b, ..., ANN circuits 7a, 7, the respective re-abnormality detectors 3a, ANN circuits 5a, A
It shows the NN circuit 7a.

Reference numeral 18 in the re-abnormality detector 3a is a detection circuit for a collective signal, and has a logical sum function that always outputs if one or more abnormality detectors in the abnormality detector group 1a are closed.

Reference numeral 19 denotes a detection circuit for individual generation, which is a circuit that outputs instantaneously (about 0.5 seconds) every time the abnormality detectors in the abnormality detector group 1a are closed.

22 is a collective signal that operates by receiving the output of the detection circuit 18 and holds the output until the reset signal r is generated which is generated by pressing the reset button 12 of FIG. 1 in the state where the output of the detection circuit 18 is cut off. It is a holding circuit.

Reference numeral 20 denotes a gate circuit that opens and closes the output of the holding circuit 22, and is a circuit that outputs an abnormality detection signal i that is momentarily disconnected for each output of the detection circuit 19.

On the other hand, the ANN circuit 5a has a function of an automatic return method,
It works as follows.

When the detection signal i is input, the ANN circuit 5a operates and the lamp output 8a blinks at the display output. At the same time, the alarm output of the ANN circuit 5a causes the alarm device 10 to sound. When the operator confirms it and presses the confirmation button 11, the lamp display 8a becomes continuous display and the alarm is stopped. After that, when the detection signal i is restored, the lamp indicator 8a is turned off. The ANN circuit 7a has a function of a manual recovery method and operates in the same manner as described with reference to FIG.

Reference numeral 21 in each of the ANN circuits 5a and 7a is an abnormality detection signal holding circuit that stores the occurrence of an abnormality, and operates by inputting the abnormality detection signal i, and the return thereof is performed by switching the switch 25 in two ways. Switch 25 is automatically returned to the contact status when the batch type re-error display is used.
Connected to the side and used as the above-mentioned automatic reset type operation, and for individual type error display, switch 25 is connected to the manual reset operation contact (b) side and used as the above-mentioned manual reset type operation. . On the (a) side of the switch 25, the return condition is restored when the detection signal i is already cut off when the confirmation signal holding circuit 23 operates by the confirmation signal k, or when the detection signal i is cut off thereafter. On the (b) side, in addition to the condition on the (a) side, the reset signal r is restored. In this way, the circuit holds the output until the above-mentioned return condition is satisfied.

Reference numeral 23 is a holding circuit for continuously displaying the lamp. When the holding circuit 21 has an output, a confirmation signal k generated by pressing the confirmation button 11 in FIG. This is a circuit that holds the output of the holding circuit 21 until it is disconnected.

24 is an output circuit which receives the blinking signal f generated from the blinking signal circuit 13 of FIG. 1 and the outputs from the holding circuits 21 and 23 and outputs the lamp display signal 1 and the alarm signal b.
When the holding circuit 23 stops outputting, the blinking signal f is output to blink the lamp and the buzzer sounds. When both holding circuits 21 and 23 output, the alarm signal b is stopped while the lamp display signal 1 is continuously output. It is a circuit.

The ANN circuits 5a and 7a both include the above-mentioned circuits and terminals I, K, R, F, L, and B for inputting and outputting the signals i, k, r, f, l, and b described above. It is configured by using the same module. However, in the case of the ANN circuit 5a, as shown in the figure, the switch 25 of the module is used by being connected in advance to the (a) side.
It should be noted that the operation of the ANN circuit 5a is generally called an automatic recovery method and is a general-purpose function, and is not limited to the circuit shown in the ANN circuit 5a in FIG. It is applicable to any semiconductor circuit.

Next, the operation of the anomaly display device of this embodiment constructed as described above will be described with reference to the time chart shown in FIG.

When No. 1 of the abnormality detector that is first closed in the abnormality detector group 1a is input, the detection circuit 18 outputs an output by the input, and the detection circuit 19 also outputs an instantaneous output of t ₁ hour. The holding circuit 22 receives the output of the detection circuit 18, holds it by itself, outputs it to the gate circuit 20, and holds the output until the reset signal r is input. The gate circuit 20 issues the abnormality detection signal i with a delay of t ₁ time from the No. 1 input. The signal i enters the ANN circuit 5a, and the holding circuit 21 outputs and holds the output. In response to this, the output circuit 24 issues a lamp blinking output and an alarm output. The above relationship is as shown in the time chart of FIG.

When the operator presses the confirmation button 11 after confirming the display and alarm generation, a signal k is input, and the holding circuit 23 operates because the output of the holding circuit 21 exists, and holds the output. In response to the output, the output circuit 24 makes the lamp display signal 1 a continuous display signal and stops the alarm signal b.

In this state, if the No. 1 input continues, the re-error detector 3a
Output is continued, and when the reset button 12 is pressed, the holding circuits 21 and 23 hold the output as they are even if the reset signal r is input, and the lamp display signal 1 and the alarm signal b do not change.

In that state, when another abnormality detector No. 2 in the abnormality detector group 1a is closed, the re-abnormality detector 3a receives it, and the detection circuit 19 gives an instantaneous (t ₁ hour) output and the gate circuit. 20 is operated and the gate circuit output is cut off for t ₁ time. After the lapse of t ₁ time, the gate circuit 20 again outputs the output, so that the abnormality detection signal i becomes a signal whose output is instantaneously cut off for t ₁ time due to No. 2 input.

The ANN circuit 5a operates as follows by this signal. That is, when the signal i is cut off, it is in the continuous lighting state after the confirmation operation, the output of the holding circuit 21 is also cut off, and the holding circuit 23 is also cut off. Therefore, since the output circuit 24 also stops, the lamp display signal 1 changes to stop (light off) and the ANN circuit 5a returns to the initial standby state. Next, at t ₁ hour later, when the signal i is input again, ANN
In the circuit 5a, the holding circuit 21 operates, but the holding circuit 23 remains inoperative, and the input state of the output circuit 24 is the same condition input as the failure occurrence. Therefore, the lamp display signal 1 becomes a blinking signal and an alarm signal. b also occurs.

By this operation, the operator can confirm that the abnormality has occurred again in the group by monitoring the lamp indicator 8a as the collective display. Therefore, when the confirmation signal k is input by pressing the confirmation button 11, the holding circuit
23 operates, the output circuit 24 makes the lamp display signal 1 a continuous signal, and the alarm signal b is stopped.

When the abnormality is recovered and the No. 1 and No. 2 abnormality detectors are opened, the lamp display 8a remains in continuous display unless the reset button 12 is pressed, but the reset button 12 is pressed and the reset signal r When is input, the holding circuit 22 in the re-abnormality detector 3a is released from holding, and the output is cut off. Therefore, the output of the gate circuit 20 is also cut off. In response to this, the ANN circuit 5a disconnects the lamp display signal 1 and turns off the lamp display 8a. This brings the original state before the occurrence of the abnormality.

In this way, according to the present embodiment, the abnormal state on the site side and the newly generated re-abnormality can be transmitted from the re-abnormality detector 3a to the ANN circuit 5a by one signal line 17a. On the side of the central control panel, an
Economical effects are obtained such that the N circuits 5a and 7a can be configured and a general-purpose inexpensive ANN circuit system is used. Furthermore, it is possible to easily deal with the addition or change of the abnormality detector or the failure of the ANN circuit by, for example, converting the modules in the case from individual display to collective display or using a spare module. become.

FIG. 4 shows another embodiment of the re-abnormality detector 3a.
The gate circuit 20 and the holding circuit 22 inside the re-abnormality detector 3a in FIG. 2 are configured by an auxiliary relay, and have the same detection function.

In the configuration of FIG. 4, the collective signal detection circuit 18 is composed of a diode OR circuit, and its function is the same as that of FIG. D is a diode, 12 is a linked reset button, 12a is its a contact, 1
2b is the b contact. 26,27 are auxiliary relays, 27a ₁ , 27
a ₂ is an a contact of the auxiliary relay 27, and 26 b is a b contact of the auxiliary relay 26. D ₅ is a sneak-in prevention diode, and other symbols are the same as those of the re-abnormality detector of FIG. In this case, the signal i is the same DC power source P as the abnormality detector.
Taken from. The operation of the auxiliary relay will be described. When the output of the detection circuit 18 is not present, the auxiliary relays 27 and 26 are inoperative and the signal i is cut off. When the output of the detection circuit 18 is present, the auxiliary relay 27 operates and resets. Auxiliary relay 2 through button 12b
7 self-holds, auxiliary relay 2 every time the detection circuit 19 operates
6 instantaneously operates and disconnects signal i. If all the abnormality detectors have been restored, the auxiliary relay 27 is restored by opening the circuit by operating the reset button 12, and returns to the original standby state. Even if a part of the re-abnormality detector 3a is configured by a relay circuit in this way, the same function can be obtained.

In the above embodiment, the lamp indicator is made to blink each time an abnormality occurs in the power plant, and then the confirmation button is pressed to continuously light up, and the reset button is operated after returning to normal to turn it off. As described above, the display format can be arbitrarily changed, such as red for an alarm, yellow for a confirmation, and green for a normal state.

As described above, according to the present invention, the re-abnormality detector is configured to hold the output of the abnormality detection signal until the reset signal is input, while the collective abnormality display circuit has the re-abnormality display function. In order to maintain compatibility with the individual abnormality display circuit, there is only one input signal line and the minimum necessary circuit configuration is used, and it is compatible with the individual abnormality display circuit only by switching the switch. Since it is possible, the individual abnormality display circuits, which occupy the majority of the abnormality display circuits constituting the abnormality display device, can be used as a relatively small number of collective abnormality display circuits. In addition, the circuit necessary for collective error display including re-errors of the manual recovery method is not provided on the error display circuit side, but on the re-abnormality detector side, which is originally a dedicated circuit for collective error display. Therefore, it is not necessary to provide an unnecessary circuit in the large number of individual abnormality display circuits. Also, after adding a re-abnormality detector on the site side, in the main control room side,
By using the abnormality display circuit that was conventionally used as an individual abnormality display circuit as a collective abnormality display circuit by switching its switch to the automatic recovery side, it is possible to easily increase the number of fault detection points in the field without increasing the number of lamp indicators. . That is, according to the present invention, a plant abnormality display device can be obtained by economically and rationally realizing a collective abnormality display including re-abnormalities by a manual restoration method.

[Brief description of drawings]

FIG. 1 is a block diagram of an anomaly display device according to an embodiment of the present invention, FIG. 2 is a detailed circuit configuration diagram of essential parts thereof, FIG. 3 is a time chart for explaining its operation, and FIG. FIG. 5 is a detailed circuit configuration diagram of a re-abnormality detector according to another embodiment of the invention, and FIG. 5 is a block diagram of a conventional abnormality display device. 1a, 1b …… Anomaly detector group, 2a, 2b …… Anomaly detector,
3a, 3b …… Re-abnormality detector, 4 …… Batch display type fault display device, 5a, 5b …… Batch fault display circuit, 8a, 8b, 9a, 9b …… Lamp display, 10 …… Alarm, 11 ...... Confirmation button, 12 ...... Reset button, 13 ...... Flashing signal circuit, 14a, 14b, 15a, 15b, 17a, 17b
…… Signal line, 16 …… Case, 18 …… Batch signal detection circuit,
19 …… Individual detection circuit, 20 …… Gate circuit, 21 ……
Abnormality detection signal holding circuit, 22 ... Collective signal holding circuit, 23 ...
… Confirmation signal holding circuit, 24 …… Output circuit, 25 …… Changeover switch, 26,27 …… Auxiliary relay.

Claims (1)

[Claims] 1. A plurality of anomaly detector groups collectively including individual anomaly detectors arranged on the site side of a power plant and similar ones of the anomaly detectors, and one of the anomaly detector junction group While holding the abnormality detection signal output from this collective signal detection circuit and the collective signal detection circuit that outputs the abnormality detection signal only while the above abnormality detector is operating, while inputting the abnormality detection signal A collective signal holding circuit that is reset by the input of a reset signal from the main control room side in the absence of state, and an individual generation detection circuit that outputs a pulse signal each time the abnormality detector in the abnormality detector group operates A gate circuit that outputs the abnormality detection signal output from the batch signal holding circuit to the outside as it is only when the pulse signal is not being input, and is arranged on the site side. A re-abnormality detector, an abnormality detection signal input terminal, a reset signal input terminal and a confirmation signal input terminal, a changeover switch that switches between an automatic recovery operation contact and a manual recovery operation contact, and the abnormality detection signal input terminal While holding the abnormality detection signal, when the confirmation signal holding signal is input in the state where the changeover switch is switched to the automatic return operation contact side, the abnormality detection signal is already cut off or the abnormality detection signal is cut off thereafter. When the abnormality detection signal is released, when the confirmation signal holding signal is input while the changeover switch is switched to the manual return operation contact side, the abnormality detection signal has already been cut off From the abnormality detection signal holding circuit that releases the holding of the abnormality detection signal when the reset signal is input after disconnection, and from the abnormality detection signal holding circuit While holding output of the confirmation signal holding circuit for holding the confirmation signal input to the confirmation signal input terminal and outputting the confirmation signal holding signal, and the holding output from the abnormality detection signal holding circuit is input. An abnormality display arranged on the side of the main control room, comprising an output circuit for outputting the first display signal, inputting the holding output from the confirmation signal holding circuit in this state and switching to the second display signal for output A circuit for connecting to the re-abnormality detector while the changeover switch is switched to the automatic recovery operation contact side, while the changeover switch is switched to the manual recovery operation contact side. An abnormality display device for a power plant, which is connected to the individual abnormality detector.