JPS60246410A - Plant operation diagnostic guide system - Google Patents

Abstract

PURPOSE:To give the most suitable operating guide and operating procedure with respect to a fault generated in a plant by providing an operating guide device for leading the plant to a safety side. CONSTITUTION:When an abnormality is generated in a plant 10, a plant data used in a fault repercussion forecasting and fault source estimating device 30, and a plant data used in an operating guide device 40 are outputted from a bus 22, and a bus 21, respectively. An hourly forecasting range of a repercussion forecasting is set by an inputted designating signal in the estimating devic 30, a fault repercussion direction, a repercussion time and a fault source are analyzed in its range, and they are outputted to an output processor 50 through a signal line 32. Also, in the guide device 40, a detained operating guide of an apparatus level for leading the plant to the safety side is determined based on each signal from the estimating device 30 inputted through a bus 33, and a data from the bus 21, and outputted to the device 50. The device 50 calulates each information inputted through the buses 32, 41, and outputs it to a plant monitor panel 70.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a plant operation diagnosis guide system,
In particular, the present invention relates to a plant operation diagnosis guide system that provides an operation guide for guiding the plant toward safety based on the results of predicting the spread of failures in the plant.

[Background of the invention]

Reaction towers are used in processing processes such as heat treatment and chemical treatment.

Thermal and chemical treatments of substances are carried out in devices such as distillation columns or trifiltrates, and these devices organically form a plant. Inside the plant, substances are processed while moving between each device one after another.
By operating each of these devices under predetermined conditions, a stable state of the plant is maintained. In the control system for steady operation.

It is extremely difficult and uneconomical to be able to control even large sudden disturbances and conditions that are far from the design conditions, such as equipment failure. Therefore, when the controllable range is exceeded, the annunciator immediately notifies the operator console of the deviation and takes appropriate measures.

The present inventors have proposed a method in which failures in plant equipment are first detected, their effects are predicted and diagnosed, and then reported (
(See Japanese Patent Application No. 58-87441, ``Failure Spread Prediction/Diagnosis Method''). In other words, when a failure occurs in a plant, the cause of the failure and the effects of the failure are predicted, and this is reported to the plant operator, who can then use this information to change the operation of each device, You can stop the operation or switch to an alternative device. However, because it merely provides predictions of spillover and diagnosis results, plant operators may make mistakes in their judgment.As plants become larger and more complex, more conditions must be taken into consideration, making it difficult to make appropriate operational decisions. becomes extremely difficult.

Separately, the present inventors have also developed a method for diagnosing a plant in a faulty state and instructing operation based on a logic circuit (Japanese Patent Application No. 57-96217 ``Plant Diagnosis Guide System j) was proposed.This is,
Operation guides are determined directly by logic circuits or computers from information from plant measuring instruments. therefore,
Because it does not include the causes of abnormalities or predictions of their spread, the above operating guide cannot provide very rough operating instructions, and does not include the transition state of abnormalities that occur in the plant. It is not possible to provide the most suitable operating guide and provide specific operating means at the equipment level.

[Purpose of the invention]

Book Jl! The purpose of Ming is to improve these conventional shortcomings,
Based on the results of failure spread prediction and diagnosis, we can provide the most appropriate operating guide and operating procedure for failures that occur in the plant using specific equipment-level information, increasing plant availability and stability. The objective is to provide a plant operation diagnosis guide system that can be used.

[Summary of the invention]

In order to achieve the above object, the present invention provides a plant operation diagnosis guide system that uses detection information from the measuring devices in a plant that has a plurality of devices and has measuring devices installed in predetermined ones of the devices. .

Plant safety is restored using a prediction/estimation means that predicts the range of influence of equipment failure and estimates the cause of the failure, as well as output signals from the prediction/estimation means and detection information from the measuring instruments. The present invention is characterized in that it includes an operation guide means for outputting an operation guide and operation procedure at the device level to perform the operation.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a plant operation diagnosis guide system showing one embodiment of the present invention.

In FIG. 1, 10 is a plant, 11 is each device constituting the plant, 20 is a human processing device, 30 is a conventionally proposed failure spread prediction/failure source estimation device, and 40 is a newly provided device according to the present invention. 50 is an output processing device, 70 is a plant monitoring panel, and 100 is an operator console. Further, as a newly provided path according to the present invention, there is a signal bus 33 for outputting signals from the failure spread prediction/fault source estimation device w30 to the operation guide device 40. All devices and signal buses other than the operation guide device ff140 and the signal bus 33 are conventionally known.

The plurality of devices 11 constituting the plant 10 include device 1
Measuring instrument for detecting the state of 1 and the plant state]
2 are connected. The measurement m]2 is not connected to all the devices 11, but only to the devices 11 that play an important role in plant operation. The plant parameter detection signals from each measuring instrument 12 are sent to an input processing device 20 via a signal bus 13 . The input processing device 120 is composed of a comparator and an analog-to-digital converter, and converts the input signal into a digital signal that can be easily processed by a subsequent device. Also, on the input side of the comparator.

A reference signal for determining whether each signal is normal or abnormal is inputted in advance, and a signal from the measuring device 12 is inputted to the other input side. If the plant 10 is operating normally, the internal input signal levels are almost equal, so a normal signal is output to the signal buses 21 and 22. However, if an abnormality occurs in the plant 10, the standard The plant lO
Detects that an abnormality has occurred in
data, and the operation guide device 40 on the signal bus 2]
Output each plant data used within.

The failure spread prediction/failure source estimation device 30 checks the plant data sent via the signal bus 22 at regular intervals, and stores the time when the signal changes from normal to abnormal (IL1). When a prediction time designation signal is sent from the operator console lOO to the fault spread prediction/fault source estimation device 30 via the signal line 31, the estimation bag w30 performs a temporal prediction of the spread prediction based on the input designation signal. Set a range and determine the direction of failure propagation within that range.

The processing device analyzes the propagation time and the failure source, and outputs each signal indicating the analysis result and the failure propagation probability via the output signal line 32! Output to 50. This process is detailed in the specification of the earlier application mentioned above (Japanese Patent Application No. 874/11/1987). That is, the process up to this point is the same as that described in the specification of the earlier application, but from the next process onwards, a different method from that of the earlier application is used.

The failure propagation prediction/fault source estimating device 30 transmits each signal of the failure propagation method, propagation time, propagation probability, and failure source determined in the above processing to the operation guide device [40] via the signal bus 33.
Send to. The operation guide device 40 uses the signals of the failure propagation method, propagation time, propagation probability, and failure source inputted via the signal bus 33 and the plant data inputted via the signal bus 21. , determines a detailed operation guide at the equipment level for guiding the plant 10 to the safe side, and outputs the guide information to the output processing device 50 via the output signal bus 41. In this case, the operation guide device 11
40, unlike conventional processing, not only the failure state but also
The guide is determined after considering what caused the failure, how much time has passed since the failure, and in which direction the failure is affecting. The inputs of these conditions are subjected to logical operations in a logic circuit to provide appropriate operation guide outputs.

The output processing bag W150 is composed of a calculation device and a storage device, and the prediction information and operation guide information input via the signal bus 32.41 are converted into screen information and alarm information by the calculation device, and then stored in the storage device. It is output to the plant monitoring panel 70 at the same time as being stored.

That is, when an abnormality occurs in the plant, the input signal is converted into information such as a screen simulating the plant or an alarm that is easy for operators to recognize, and stored.
After reporting the occurrence of an abnormality using the CR7 screen 71, voice notification device [72, annunciator 73, etc. in 70], a screen request signal is sent from the plant operator via the signal line 51, thereby predicting the spread of the failure and estimating the source of the failure. Device! 30. Operation guide device! A screen summarizing the 40 analysis results is displayed on the CR7 screen 71. Note that the annunciator 73 only has the function of making a buzzer or the like ring, and the voice notification device 72 has the function of notifying the occurrence of an abnormality using magnetic tape, voice synthesis, or the like. All of this information is transmitted to the plant monitoring panel 70 via the signal line 52.

Next, an example of application of the present invention in an actual plant will be shown.

FIG. 2 is a diagram showing main equipment and their connection relationships in an atomic couplant to which the present invention is applied.

200 is a nuclear reactor, 240 is a turbine, 280° and 310 are water supply pumps, and 215 is an emergency water injection device.

In the reactor 200, the cooling water 210 is heated by decay heat due to nuclear fission.
is heated to turn it into steam 220, and the steam 220 is guided to the turbine 240 via the piping 230.
0 and the generator 250 generates electricity. nuclear reactor 20
At 0, only the amount vaporized and sent to the turbine 240;
Since the cooling water 210 has decreased, in order to replenish it,
Piping 2 supplies cooling water with an amount of condensate 260 below the turbine 240.
70 via water pump 280 or water pump 310
and is sent to the nuclear reactor 200 by one or both of these. In an actual boiling water type nuclear reactor, there are normally two feedwater pumps 280 and 310, but in order to simplify the explanation, only one pump is shown here. 'The reason why there are two or more water supply pumps 280 and 310 is to create a dual system for safety reasons, and the water supply pump 280 uses the turbine 340 as its power source, the water supply pump 310 uses the drive motor 350, Each is used. In addition, one water supply pump 280 can be used as the water supply pump 3.
Since it is possible to handle the same water supply amount as for two units of 10, it is more efficient to drive the pump 280 when driving either one.

In addition, in nuclear power generation, reactor 20
It is necessary to maintain the zero water level within a certain range, and for this purpose, an emergency injection device 215 is provided that has the function of injecting water into the nuclear reactor 200 in an emergency. This device 21
Although a plurality of atomic couplants 5 are provided in an actual atomic couplet, only one is shown to simplify the explanation.

Each device in Figure 2 200, 240, 250, 280.31
0,350,215 are equipped with measuring instruments (not shown) for detecting the status of one piece of equipment, and plant parameter detection signals from these measuring instruments are sent to the operation guide device via the input processing device 20. 40 and is input to the failure spread prediction/failure source estimation device 30.

In the present invention, the processing method of the failure propagation prediction/fault source estimation device 30, that is, the method of determining the failure propagation direction, propagation time, and failure source, is carried out in the above-mentioned order (Japanese Patent Application No. 58-87441
No.) The method is exactly the same as the method shown in the specification.

FIG. 3 is an operation guide showing one embodiment of the present invention! 1i5
FIG. 3 is an explanatory diagram of a signal processing method of f.

In the operation guide group [40, the plant data sent from the input processing device 20 via the signal bus 21 and the failure spread prediction/fault source estimation device i! 30 via the signal bus 33, the logic circuit 50
0 performs signal processing and determines the operation guide. here,
The hardware portion of the operation guide device 40 is realized by a general-purpose computer or a dedicated logic circuit.

Next, an example of a signal processing procedure performed by the operation guide device 140 will be explained with reference to FIG.

A plurality of registers for storing input signals and their states are arranged on the input side, and their state values are input to the logic circuit 500. That is, the signals input via the signal bus 21 include the failure status of each device, such as reactor water level low 410, PCV pressure high 420, turbine failure, condenser failure, water pump failure, piping failure, etc. be. In addition, the signals input via the signal bus 22 include the cause of the failure for each of the above states (reactor water level low 410, water pump A abnormality 430, water pump B abnormality, Durbin abnormality, condenser Abnormalities, generator abnormalities, piping abnormalities, nuclear reactor abnormalities, etc., for PCV pressure high 420, the above causes and others), the propagation time of the failure (water pump 8 function loss time 4
40. Water pump B function loss time, etc.) Failure propagation direction: Spreads to the entire nuclear couplant, spreads only to the reactor, spreads only to the turbine, spreads only to the water pump, etc.
).

For example, reactor water level low 410, which is plant data from each measuring device installed in the nuclear couplant via the signal bus 21, is now available. PCV pressure height 420 is input,
In addition, the cause of the failure (water supply pump A abnormality 430) and the failure propagation time (water supply pump A function loss time 440) determined by the failure propagation prediction/failure source estimation device W130 are input via the signal bus 33. Consider the case.

The logic device 500 of the operation guide device 40 is activated at the same time as an abnormality occurs in the plant. Now, it is assumed that the water supply pump A is normally in the activated state and the start-up time of the water supply pump B is 10 minutes.

On the output side of the logic circuit 500, there is a memory (RAM) in which all operation guides for each signal state number 2 are stored.
, ROM or register), and a logic circuit 50
A zero output selects one of the memory addresses and accesses the memory with it to read the operating guide.

From the input processing device 20 to the plant via the signal bus 21
Data (reactor water level drop 410, or PCV pressure high 4
20) is input, as an operation to lead the plant to the safe side, if the water supply pump A error 430 is not input, that is, if the water supply pump A is normal, the input side register corresponding to the water supply pump A error The state value of II OH
Therefore, the inverter (NOT) 502
becomes one input of the AND gate, and the state value "1" of reactor water level drop 410 or PCV pressure high 420 becomes the other input, and [water pump rotation speed increase 8] 5
Output 10 operation guides. By executing this operation from the plant monitoring panel, it becomes possible to return the water level of the nuclear reactor 200 to within a predetermined range.

In the above case, if water pump error 430 is input (
status value is 'i'), and water pump eight function loss time is 44
If 0 is longer than 10 minutes (state value is ``bi''), AND gates 504 and 505 are turned on, so follow the guide 520 [Start water supply pump B start/stop water supply pump A after 10 minutes]. Output. In addition, water supply pump 8 function loss time 4
When 40 is less than 10 minutes (state value is "O"), 1" inverted by inverter 506 is output to AND gate 507.
Since the output of the AND gate 504 becomes the other input and turns on, "Emergency water injection device operation/start of water supply pump B/stop of water supply pump A" 530
Output the guide.

The output signal from the operation guide device 40 is transferred to the output processing bag w50 via the signal bus 41, converted into a usable form and stored, and at the same time is sent to the operator by an annunciator 73 and a voice notification device [72]. Inform. When a plant operator makes a request from the console lOO, the stored operation guide information is read out and displayed on the CRT screen 71 in the plant monitoring lE, 70 and the audio notification device t!
72.

In the above example, among the information included in the output signal from the failure spread prediction/failure source estimation device 30, the water supply pump abnormality 430
By using the water supply pump A function loss time 440, it is possible to clearly guide whether the emergency water injection system [215 is activated or not, the start timing of the water supply pump B, and the stop timing of the water supply pump A. , Therefore, unnecessary activation of the emergency water injection device 2] 5 and water supply pump A
Preventing secondary failures due to switching timing mistakes of water pump B and water supply pump B, and also preventing water supply pump
This makes it possible to prevent water supply pump A from being damaged due to mistakes.

In this way, the operation guide device 40 of this embodiment receives information on the cause of a failure and its spread from the failure spread prediction/fault source estimation device 30 that predicts and diagnoses the spread of plant failures using network techniques and logic circuits. Since these are taken in as one of the decision requests for the plant operation diagnosis guide, it is possible to provide specific operation guide information at the equipment level, which was not possible with conventional guide devices. That is, the cause of the failure means the past of the plant, the detection signal from the measuring instrument means the present of the plant, and the spread prediction means the future of the plant. Therefore, the guide device 40 of this embodiment can detect transition states of the past, present, and future. This makes it possible to provide detailed guide information most suitable for abnormalities occurring in the plant.

〔Effect of the invention〕

As described above, according to the present invention, based on the results of fault spread prediction and diagnosis, the most suitable operating guide and operating procedure are provided for a fault that occurs in a plant using specific equipment-level information. As a result, plant availability and safety can be improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a plant operation diagnosis guide system showing one embodiment of the present invention, FIG. 2 is a diagram showing main equipment and their connection relationships in an atomic coupler to which the present invention is applied, and FIG. The figure is an explanatory diagram of a signal processing method of an operation guide device showing an embodiment of the present invention. lO nibrant, 11: equipment, 12: measuring instrument. 20: Input processing device, 30: Failure propagation prediction/fault source estimation device, 40: Operation guide device, 50: Output processing device, 7
0 Nibrant monitoring panel, 100: Operator console, 200: Child reactor, 240: Turbine, 280, 310
: Water supply pump, 215: Emergency water injection device, 500: Logic circuit. Patent Applicant: Hitachi, Ltd. Patent Attorney Masatoshi Isomura Continued from page 1 O Inventor: Mura 1) Fumio Hitachi, Ltd., 4-6 Kanda Surugadai, Chiyoda-ku, Tokyo

Claims (3)

[Claims] (1) In a plant that has a plurality of devices and has measuring instruments installed at predetermined ones of the devices, predicting the range of influence that a device failure will have based on the detection information from the measuring devices,
and a prediction/estimation means for estimating the cause of the failure;
A plant operation diagnosis characterized by comprising an operation guide means for outputting an operation guide/operation procedure at an equipment level for restoring plant safety based on an output signal from the estimation means and detection information from the measuring device. guide·
system. (2) The operation guide means inputs the abnormal state of the system detected by the measuring instrument, the cause of the failure, and the scope of the failure from the prediction/estimation means, and provides one of the specific operation guides at the equipment level. The plant operation diagnosis guide system according to claim 1, further comprising a logic circuit for outputting the following. (3) The operation guide means receives the abnormal state of the system, the cause of the failure, the scope of the failure, as well as the time required until each unit and equipment loses its function, and operates based on the information. The plant operation diagnosis guide system according to claim 1, which outputs a guide.