JPH02171998A - Plant accident analyzing device - Google Patents

Abstract

PURPOSE:To execute the automatic retrieval and display of an accident cause by respectively subtracting the ordinal number of accident data and the ordinal number of plural accident cause analysis files for each same contact and defining the accident cause of the accident cause analysis file, for which the total value of difference is a set value, as the accident cause of a plant. CONSTITUTION:When an accident is generated, out of plant data outputted from the plant in such a case, the change of a series of the contacts needed for the analysis of the accident cause is collected and recorded as the accident data by a trip sequence log means 1. The ordinary number is added to each contact in the order of the contact change generation by an accident cause retrieving means 2 and by the ordinary number and the ordinal number of the plural accident cause analysis files read from a memory device 3, the subtraction is executed respectively for each same contact. Then, the accident cause of the accident cause analysis file, for which the total value summing up the difference concerning all the contacts reaches the set value, is defined as the accident cause of the plant and displayed by an output device 4. Thus, when the accident is generated in the plant, the accident cause is automatically displayed to the output device.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a plant accident analysis V device that automatically searches and displays the causes of various accidents that occur in industrial plants such as thermal power plants.

(Prior Art) In conventional thermal power plants, unit computers are merely used as trip sequence loggers for analyzing the causes of plant accidents.

This trip sequence logger collects various contact changes in chronological order when an accident occurs, which is necessary for analyzing the cause of the accident, and cannot automatically search for the cause of the accident.

That is, in conventional thermal power plants, when an accident occurs, plant accident data collected in a trip sequence logger is manually analyzed by an operator to determine the cause of the accident.

(Problems to be Solved by the Invention) As mentioned above, in Ifi plants such as conventional thermal power plants, plant accident analysis is performed manually by operators, which requires a lot of time and money. Moreover, it was difficult to make quick and accurate decisions.

This causes delays in responding to plant accidents and recovery, which in turn leads to a decline in plant availability.

Therefore, the present invention was made in consideration of the above-mentioned character shape, and its purpose is to provide a plant accident analysis device that can automatically search and display the cause of an accident when an accident occurs in a plant. be.

[Structure of the invention]

(Means for solving the problem) Generally, the cause of an accident in an industrial plant such as a thermal power plant is determined by comparing changes in contact points when a new accident occurs in the plant with past cases.

(1) In other words, when a new accident occurs, one effective way to analyze the cause of the accident is to compare it with similar accidents that have occurred in the past.

(2) Also, in the comparison method, it is better to compare various contact changes at the time of an accident.

(3) However, even if the cause of the plant accident is the same,
The items of contact change may be different between past accidents and current accidents.

This is because contact changes differ depending on the operating state of the plant at the time of the accident, and contact changes that are not directly related to the accident may occur at the same time by chance.

Therefore, it is difficult to perform accurate accident analysis by simply comparing the items of contact change during past and present accidents.

(4) In other words, only the items of contact change, which are the decisive factor in accident analysis, must be compared, and all items that are not decisive must be excluded before comparison is made. In addition, it is necessary to use some form of comparison for the 1q contact change that occurs with a certain probability.

(5) In order to accurately, efficiently, and automatically perform the work in (4) above, the present invention is proposed by focusing on the "singleness" of the contact change in each accident.

In other words, the invention according to claim 1 (hereinafter referred to as the invention of cylinder 1) is to analyze a series of changes in contact points necessary for analyzing the cause of the accident in chronological order as accident data from among the plant data received at the time of the occurrence of the accident in the plant. trip sequence log means for collecting and recording the accident causes, and an accident cause analysis file that sequentially assigns ordinal numbers to the plurality of contact points that changed at the time of the accident for each of the causes of various accidents assumed in the plant, in the order in which the changes occurred. a memory device for storing a plurality of data; an ordinal number is assigned to each contact point of the accident data read from the lip sequence log means in the order of occurrence of the change; The ordinal number of the accident cause analysis file is reduced for each contact, and when the total value of these differences for all contacts reaches the set value or less, the accident cause of the accident cause analysis file is reduced. The present invention is characterized by comprising an accident cause search means for causing an output device to display the cause of the accident in the plant.

In addition, the invention according to claim 2 (hereinafter referred to as the invention of claim 2) is based on the plan 1-data received at the time of an accident in a plant, and uses a series of changes in contact points necessary for analyzing the cause of the accident as accident data. A trip sequence log means that converges and records in chronological order, and 8 expected in the plant.
For each cause of an accident, a score is given to each of the multiple contact points that changed at the time of the accident, with a weight of 1 based on the analysis importance of the cause of the accident, and the total score of these scores is given to each of the points. When each point of contact between the accident data read from the memory device that stores a plurality of analysis files and the trip sequence log means is given a score based on the importance of analysis of the cause of the accident,
The total score m of these scores is assigned to It, and the total score of this accident data is sequentially compared with the total score of the plurality of accident cause analysis files read from the memory device, and the The present invention is characterized by comprising an accident cause search means for displaying the cause of the accident in the accident cause analysis file as the cause of the accident in the plant on an output device after searching the accident cause analysis file.

(Function) First invention> When an accident occurs in a plant, a plan is output from the plant at that time! - From among the data, a series of changes in contact points necessary for analyzing the cause of the accident is collected and recorded as accident data by trip sequence log means.

Next, each contact change in this accident data is read by the accident cause search means, and an ordinal number is assigned to each contact in the order in which the contact change occurs.

Furthermore, the accident cause search means subtracts this ordinal number from the ordinal numbers of the plurality of accident cause analysis files read from the memory device for each of the same contacts, and the total value of these differences for all the contacts is calculated. The present invention is characterized in that, when an accident cause analysis file that reaches a predetermined value or less is searched for, the accident cause search means causes an output device to display the accident cause of the accident cause analysis file as the cause of the accident in the plant.

<Second invention> When an accident occurs in a plant, a series of changes in contact points necessary for analyzing the cause of the accident is collected as accident data by trip sequence log means from among the blunt data output from the plant at that time. and recorded.

Next, each contact change in this accident data is read by the accident cause search means, and here, for each contact, a weighted score based on the analysis importance of the accident cause of that contact,
The total score will be added.

Furthermore, the total score of this accident data is sequentially compared by the accident cause search means with the total score of the contact points of each accident cause analysis file read from the memory device, and the sum of this accident data is When an accident cause analysis file having a total score is retrieved, the accident cause of that file is displayed on the output device as the accident cause of the accident data.

Therefore, according to the present invention, when an accident occurs in a plant, the cause of the accident is automatically displayed on the output device, so that the cause of the accident can be determined quickly and accurately. Response and recovery can be carried out quickly.

(Example) Examples of the first and second inventions of the present application will be described below with reference to FIGS. 1 to 5.

FIG. 1 is an overall configuration diagram showing the overall configuration of an embodiment of the invention of the present application 1, and in the figure, this embodiment is composed of a unit computer] ・A lip sheet event log means 1 and a computer Accident cause search means 2 is shown on the right.

The trip sequence log means 1 stores a series of changes in contact points necessary for analyzing the cause of the accident as accident data from among the plant data P output from the plant as soon as an accident occurs in the branch (not shown). It is a unit computer that collects and records data in series.

Further, the accident cause search means 2 is a computer equipped with a memory device 3 and an output device 4.4 such as a CRT and a printer.

The memory device 3 stores accidents that have occurred in the past in a plant (not shown), or various types of accidents that are assumed, in the format of accident cause analysis files 3a, 3a, etc. shown in FIG. 2, respectively. .

That is, a large number of accident cause analysis files 3a are created for each accident cause, such as "low oil pressure," and various contact points that change during an accident that occurs based on the accident cause are arranged in chronological order in the order in which the changes occur. Moreover, ordinal numbers such as 1, 2, 3, etc. are assigned to these contacts in the order in which the changes occur.

The accident cause search means 2 reads the accident data 1a from the trip sequence log means 1, while the memory device ff3
sequentially read multiple accident cause analysis files 3a from
This accident cause analysis file 3a is compared with the accident data 1a one after another, the accident cause analysis file 3a that matches this accident data 1a is searched, and the accident cause of the accident cause analysis file 3a is used as the accident cause of the plant accident. It is configured to output to the output horn device 4.4, respectively.

That is, the accident cause search means 2 searches each contact point of the accident data 1a read from the 1-lip sequence log means 1,
An ordinal number, for example 1, 2.3, etc., in the order of change in the contact point.
. . , and from each ordinal number of the accident data 1a, each ordinal number of the accident cause analysis file 3a is subtracted for each contact point, and the difference for each contact point is summed.

When this total value is, for example, 0, the ordinal number of the accident data 1a and the accident cause analysis files 3a, 3a...
The ordinal numbers are all the same for each contact, indicating that both contact changes occur in the same order.

Therefore, accident cause search means 2 uses such Goda number as Ol.
Alternatively, if a slight error is recognized and the approximation 1n of 0 is being set, the cause of the accident in the accident cause analysis files 3a and 3a can be used as the cause of the accident in the accident data 1a, respectively, to each output device 4゜4 of the CRT and printer. Output and display.

In addition, the accident cause analysis file 3a is included in the accident data 1a.
If there is no contact corresponding to the contact, delete it. This is to exclude the possibility that contacts that are not directly related to the accident that is currently occurring in the plant are changing at the same time due to some reason.

Next, the operation of this embodiment will be explained.

If an accident occurs at a plant (not shown), the plan 1
From among the plant data P output from -, a series of contact changes necessary for analyzing the cause of the accident is collected and recorded in chronological order by the trip sequence log means 1 as accident data.

Then, this accident data 1a is read from the trip sequence log means 1 by the accident cause search means 2, and each contact point of this accident data 1a is given an ordinal number in the order in which the changes in A occur.

On the other hand, the accident cause retrieval means 2 successively reads a plurality of accident cause analysis files 3a, 3a... from the memory device 3, and reduces the number by the ordinal number of each contact point of the accident data 1a and the ordinal number of the accident cause analysis file 3a. 51 until the accident cause analysis file 3a is searched in which the joint resistance of the difference for each contact reaches the set value of 0 or its approximate value, and when the metalwork 1 value reaches the set value, The causes of the accident in the accident cause analysis file 3a that have reached the set value are output as the causes of the accident in the accident data 1a to each output device 4.4, such as the CRT and the printer, for display.

Therefore, according to this embodiment, when an accident occurs in the plant, the cause of the accident is automatically and quickly and accurately displayed on the output branches δ4 and 4, respectively.

As a result, countermeasures and recovery from plant accidents can be carried out quickly and accurately, and the availability and safety of plant operations can be dramatically improved.

Incidentally, the trip sequence log means 1 and the accident cause search means 2 of the above embodiment may be constructed by one computer 5 as shown in FIG.

FIG. 4 shows the overall configuration of an embodiment of the second invention of the present application, and this embodiment is characterized by the accident cause search means 12 and the memory device N13, and the trip sequence log means 11 other than these. CRT and printer output vt position 14
．． 14 is the same as the trip sequence log means 1 and the output devices 4 and 4 shown in FIG. 1, so a redundant explanation will be omitted.

The memory device 13 stores accidents that have occurred in the past in a plant (not shown), or various types of accidents that are assumed, in the format of accident cause analysis files 13a, 13a, . . . shown in FIG. 5, respectively.

For example, the accident cause analysis file 13a is rMO.
A large number of contacts have been created for each accident cause, such as "P abnormality", and various contact points that change in the event of an accident that occurs based on the cause of the accident are
They are arranged in chronological order in the order in which the changes occurred, and these contact points are weighted for each type of accident and given a score, for example, from 0 to 10.

Here, the weight 10 is attached to a contact point that always changes in a certain accident. In other words, it has an important meaning or is a decisive factor in comparison with past accidents for accident analysis.

Furthermore, the weight O is given to items that indicate whether there is a change in the contact point in the accident, or even if there is a change, it must be excluded from comparison. In other words, it is clearly unrelated to the accident.

Furthermore, weights 1 to 9, which are intermediate between weight 10 and weight 0, have a certain probability of occurring at the time of the accident.4'? It is Rurano,
It is given to things that need to be compared to some extent.

Regarding these intermediate m, one from 1 to 9 is found depending on the probability of contact change occurring in the accident.

Then, after calculating the points for each change in each contact using the "weight" number, the total of these points is added to each cause of the accident.

On the other hand, the accident cause search means 2 stores the accident cause analysis file 13a at each contact point of the accident data 11a read from the trip sequence log means 11.

Accident data file 15.15... is created by adding scores and total points using the same weighting as in 13a...
The total score of this accident data file 75 is sequentially compared with the accident cause analysis files 13a, 13a, . . .
When an accident cause analysis file 13a having an approximate total score is retrieved, the cause of the accident in the accident cause analysis file 13a is displayed by the output device 14.14 as the cause of the accident currently occurring in the plant.

Therefore, according to this embodiment, as in the embodiment of the first invention, when an accident occurs in a plant, the cause of the accident is automatically displayed on the pH4r14 system quickly and accurately. be done.

As a result, countermeasures and recovery from blunt accidents can be carried out quickly and accurately, and the availability and safety of plant operations can be dramatically improved.

In addition, in this embodiment as well, trip sequence log means 11 and accident cause search means 1 are provided, which are not shown in FIG.
2 may be configured by one computer.

〔Effect of the invention〕

↓As explained above, according to the first and second inventions of the present application, when an accident occurs in a plant, the cause of the accident can be displayed quickly and accurately on the output device, so that the plan - accident countermeasures can be quickly and accurately displayed. and restoration can be carried out quickly and accurately, and the availability and safety of plant operation can be improved.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing the overall configuration of an embodiment of the present invention, FIG. 2 is a diagram showing the configuration of an accident cause analysis file not shown in FIG. 1 and stored in a memory device, and FIG. 1 is a configuration diagram showing a modification of FIG. 1, FIG. 4 is an overall configuration diagram of an embodiment of the second invention of the present application, and FIG. FIG. 3 is a diagram showing a data file. 1... Trip sequence log means, 2゜2... Accident cause search means, 3゜3... Memory device, 4゜4... Output device.

Claims (1)

[Scope of Claims] 1. A trip sequence log means for collecting and recording a series of changes in contact points necessary for analyzing the cause of an accident in chronological order as accident data from among plant data received when an accident occurs in the plant; , a memory device that stores a plurality of accident cause analysis files in which ordinal numbers are sequentially assigned to a plurality of contacts that changed at the time of the accident for each of the causes of various accidents assumed in the plant, and the trip sequence log; An ordinal number is attached to each contact point of the accident data read from the means in the order of occurrence of the change, and the ordinal number of this accident data and the ordinal number of the plurality of accident cause analysis files read from the memory device are assigned for each contact point. an accident cause search means that causes an output device to display the cause of the accident in the accident cause analysis file as the cause of the accident in the plant when the total value obtained by summing these differences for all contacts reaches a set value or less; A plant accident analysis device comprising: 2. A trip sequence log means that collects and records a series of contact changes necessary for analyzing the cause of the accident in chronological order as accident data from among the plant data received when an accident occurs, and An accident cause analysis file in which points are assigned to each of the multiple contact points that changed at the time of the accident, weighted based on the analysis importance of the cause of the accident, and the total score of these points is assigned to each of the causes of the various accidents. a memory device that stores a plurality of data, and each contact point of the accident data read from the trip sequence log means, each point is assigned a score based on the analysis importance of the cause of the accident, and a total score of these scores is assigned, When the total score of this accident data and the total score of the plurality of accident cause analysis files read from the memory device are sequentially compared and the accident cause analysis file having a similar total score is searched,
A plant accident analysis device comprising an accident cause search means for displaying the cause of the accident in the accident cause analysis file as the cause of the accident in the plant by means of an output device.