JPH0644482A - Plant equipment diagnostic device - Google Patents

Abstract

PURPOSE:To automatically select a diagnostic rule matched with the contents of patrol and inspection and to diagnose an equipment using the diagnostic rule. CONSTITUTION:When an inspection item extraction instruction is sent to a means 2 based on the operation of a display/input part 21 by an operator, the means 2 extracts a required inspection item from a file 11 and sends it to the means 3. The means 3 displays an inspected result for which data are collected for the inspection item at the display/input part 21 and the means 4 preserves the inspected result at the file 12. When the means 5 sends a diagnosis execution request signal to the means 6 based on the operation of the operator, the means 6 selects the optimum diagnostic rule matched with execution conditions from the file 13 and simultaneously reads the data from the files 12 and 14. The means 7 performs diagnosis by comparing inspection data and reference value data under the rule and the diagnosed result is displayed at the display/input part 21 by the means 8 and is also recorded in the file 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plant equipment diagnostic device for performing equipment diagnostic work carried out as part of plant maintenance work in a power plant or the like.

[0002]

2. Description of the Related Art Conventionally, regarding the monitoring and maintenance of the operating conditions of various plants such as power plants, facility diagnosis is generally performed using an electronic computer. In this case, regarding the data used to determine the status of each facility that composes the plant, process data detected by the detector (sensor) attached to the main equipment is taken in online, or recording paper is used. Alternatively, an inspection data input device such as a handy terminal is used to take in the data collected in an offline form in which the inspection contents of the site inspection work are measured and recorded by a person.

In a large-scale plant such as a power plant, it is not possible to take in all the process data that can grasp the maintenance status of all the facilities online. Therefore, in general, even directly near the plant components. They go out and check the equipment status (patrol inspection). In addition, detailed inspection work that requires disassembly and assembly work of the equipment is also performed as necessary, and in this case, equipment diagnosis is performed by using data collected and recorded online by humans in the online form. In particular, in an existing plant, for example, a plant that is severely deteriorated such as some hydroelectric power plants, it is economically difficult to newly install a detector that captures the process amount necessary for facility diagnosis. Therefore, on-site inspections are indispensable for equipment maintenance.

[0004] As a patrol inspection work of a power plant, for example,
In addition to the regular inspection work that is usually carried out on a regular basis, the precise inspection work that inspects the plant status in more detail, and the inspection work that regularly records the equipment status for plant equipment maintenance management, etc. There are non-regular patrol inspection work that is specially performed depending on the condition of the plant, such as inspection work when the unit is started and inspection when the plant is abnormal. In addition, when conducting a patrol inspection, several kinds of patrol inspection work are combined each time, so the contents of the patrol inspection work are diverse.

On the other hand, in equipment diagnosis for plant components, data items to be taken in are always fixed when data is taken in online. Therefore, in the equipment diagnosis in this case, fixed rules are usually used. . Also,
Even when the measured and collected data is taken in offline, the data items to be taken in are fixed and the diagnosis is generally performed according to a fixed rule. In recent years, the contents of the data to be taken in may be variable when the data collected by measurement is taken offline. In this case, equipment diagnosis is performed by several types depending on the contents of the data taken by the patrol staff (operator) each time. The diagnostic rules of are selected and combined. Alternatively, a fixed rule is used to make a diagnosis, and a numerical value that is a certainty factor indicating the trueness of the result is also shown.

[0006]

However, when the spectator (operator) selects and combines the diagnostic rules to be used as described above according to the contents of the data captured each time, the data collected by measurement is patrolled for inspection. It is necessary to select the diagnostic rule to be used so that the optimal diagnostic result that reflects the difference in the meanings of the implementation conditions can be obtained. Therefore, knowledge and experience regarding the configuration and equipment of the scanning plant is an important point, and it has been necessary for a skilled technician to carry out or with the advice of a skilled technician. Further, there is a problem that selecting and combining diagnostic rules suitable for the content of the measured and collected data from a large number of diagnostic rules requires an enormous amount of work and requires a great deal of time and labor.

Further, in the case of making a diagnosis by using a fixed rule, it is difficult and highly accurate to make a diagnosis that reflects the meaning of each inspection data depending on various situations related to the measured and collected data. There was a problem that the diagnosis result could not be obtained. As a case where the measured and collected data have different meanings depending on the situation of related items, a pressure oil pump in a hydroelectric power plant will be described as an example.

A plurality of pressure oil pumps for sending the oil for controlling the main engine of the hydroelectric power plant to the pressure oil tank are usually provided and are used as a regular service and a backup. From the viewpoint of operation and maintenance, these multiple pumps are regularly switched between regular use and standby so that the operating time of each pump is even.In general, this switching operation is performed in conjunction with patrol inspection work. There is.

[0009] In the usual inspection of the pressure oil pump, the discharge pressure of the pump and the current of the pump motor are measured and collected, but as a regular use among a plurality of units (here, two units A and B). When Unit A is used, only the Unit A shows operating data in a normal state, and the Unit B used as a backup is stopped, so each measured value shows zero. However, when the oil level in the pressure oil tank is lowered due to a decrease in the performance of the machine A or an abnormality in the oil supply piping, the machine B, which is a standby machine, automatically starts, and the machine B also shows the operation data. In consideration of such a situation, usually, both Unit A and Unit B are listed as data measurement items in patrol inspection.

Further, in the case of a patrol inspection in which the switching operation between the regular use and the standby state of the pump is performed as described above, after measuring the operation data of the Unit A used as the regular use before switching the pump, It is common to switch between regular use and standby, and then measure the operation data of Unit B newly used for regular use. Therefore, in the patrol inspection without the pump switching operation, it is shown that some abnormalities have occurred when the operation data of both Unit A and Unit B are measured. In this case, the fact that the operating data of both Unit A and Unit B are shown does not indicate normal or abnormal.

As described above, even if the measurement data is the same, the meaning of the measurement data may differ depending on the conditions and conditions of related items. Therefore, in the diagnosis using the fixed diagnosis rule, the accuracy of the result is high. I had a problem with.

The present invention has been made in view of the above circumstances, and even when the data items to be taken in for facility diagnosis are variable, the contents of the patrol inspection to be performed will determine the contents of the patrol inspection at that time. It is an object of the present invention to provide a plant equipment diagnosis apparatus capable of automatically selecting a suitable diagnosis rule and performing equipment diagnosis using this diagnosis rule.

[0013]

As a means for solving the above-mentioned problems, the present invention provides process data from each sensor installed at a predetermined location of a plant and measurement data obtained by inspection inspection of plant equipment. Based on a plant equipment diagnosis device for diagnosing the presence or absence of abnormalities or abnormal signs of equipment of the plant, a patrol inspection execution condition setting means for setting the execution conditions when performing the patrol inspection,
According to the execution conditions set by the inspection inspection execution condition setting means, inspection inspection item extraction means for extracting a target inspection inspection item from the inspection inspection item file, and inspection inspection extracted by the inspection inspection item extraction means A patrol inspection result data input means for inputting patrol inspection results collected regarding items, a patrol inspection data storage means for storing the inspection data input by the patrol inspection result data input means in a patrol inspection data file, and the equipment Equipment diagnosis execution requesting means for requesting execution of diagnosis, and based on a request from the equipment diagnosis execution requesting means, read the inspection inspection data from the inspection inspection data file,
Diagnostic processing control means for reading a diagnostic rule corresponding to the condition set by the inspection inspection execution condition setting means from a diagnostic rule group file and also reading reference value data used for diagnosis from a diagnostic reference value file; Based on the diagnostic rule read by the processing control means, a diagnosis is made by comparing the inspection inspection data with the reference value data, and the diagnostic result is stored in a diagnostic result file; and the diagnostic result storage And a facility diagnostic result display means for reading out the diagnostic result stored in the file and displaying the read result.

[0014]

In the above structure, the inspection check item extraction means extracts the target inspection check item from the inspection check item file based on the inspection check execution condition set by the inspection check execution condition setting means. The inspection inspection result data input means inputs the result of inspection work carried out in accordance with the inspection inspection items extracted by the inspection inspection item extracting means. The patrol inspection data storage means stores the patrol inspection result in a patrol inspection data file.

When the work is completed for all the inspection inspection items and the inspection inspection result data is stored in the inspection inspection data file, the facility diagnosis execution request means makes a diagnosis request based on the inspection inspection data. Upon receipt of the diagnosis request, the diagnostic processing control means retrieves the inspection inspection data from the inspection inspection data file, and records the inspection rule according to the inspection inspection execution condition set by the inspection inspection execution condition setting means recorded therein. The reference value data for comparison and determination are extracted from the diagnostic rule group file and the diagnostic reference value file, respectively. The diagnostic processing execution means executes the diagnostic rule using the inspection inspection data and the reference value data extracted by the diagnostic processing control means, and saves the diagnostic result in the diagnostic result file.

The diagnostic rule is composed of IF / THEN rules for comparison judgment of the inspection inspection result data corresponding to the measured value and a preset reference value, and a logical product (AND operation) and a logical sum (OR operation) of the comparison judgment. Has been done.
The diagnosis result display means displays the equipment diagnosis result from the diagnosis result file, and also displays the diagnosis history and related data.

As a result, the equipment can be diagnosed by using the optimum diagnosis rule according to the inspection inspection execution condition, so that highly accurate equipment maintenance can be realized and the equipment operation efficiency can be improved.

[0018]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 shows the configuration of a power plant facility diagnostic apparatus according to an embodiment of the present invention. A patrol inspection operator (operator) or the like sets inspection inspection execution conditions before the inspection is carried out. Inspection condition setting means 1, inspection inspection item file 11 storing inspection inspection items, inspection inspection item data 41 targeted by inspection inspection execution conditions set by inspection inspection execution condition setting means 1 and inspection inspection item extraction command 31 Inspection inspection item data extracting means 2 for extracting from inspection inspection item file 11 and inspection inspection result data input means 3 for inputting inspection inspection results of inspection inspection items displayed by inspection inspection item display command 32, inspection inspection data saving instruction 33 The inspection inspection result data input means 3 saves the inspection inspection data input by the inspection inspection data storage means 4 and the inspection inspection data storage means. Patrol inspection data file 12 for storing patrol inspection data 42, equipment diagnostic execution requesting means 5 for issuing equipment diagnostic execution request command 34, diagnostic rule group file 13 for storing equipment diagnostic rules, and reference value data for equipment diagnostics. In response to the inspection reference value file 14 and the equipment diagnosis execution request command 34 from the equipment diagnosis execution request means 5, the inspection inspection data is received from the inspection inspection data file 12 and the inspection inspection set by the inspection inspection execution condition setting means 1 is performed. Diagnostic rule data 43 according to implementation conditions
And the reference value data 44 from the diagnostic rule group file 13 and the diagnostic reference value file 14, the diagnostic processing control means 6, the equipment diagnostic result file 15 that stores the result of equipment diagnosis, and the equipment diagnostic processing execution by the diagnostic processing control means 6. Diagnostic processing execution means 7 for receiving the command 35, performing diagnostic processing, and storing the equipment diagnostic result data 45 in the diagnostic result file 15,
According to the equipment diagnosis result display command 36, the equipment diagnosis result display means 8 receives the equipment diagnosis result from the diagnosis result file and displays it on the display input unit 21.

With the above configuration, when a patrol (operator) or the like operates the display input section 21 before the inspection inspection, the inspection inspection execution condition setting means 1 sets the execution condition of the inspection inspection to be performed this time, The inspection inspection execution condition information is sent to the inspection inspection item extracting means 2.

The inspection inspection execution condition setting screen 100 shown in FIG.
FIG. 4 shows an example of a setting screen for inspection inspection execution conditions in inspection inspection execution condition setting means 1. In the figure,
By selecting whether or not to carry out the inspection inspection from the inspection inspection types and items displayed on the inspection inspection execution condition list screen 101 and pressing the inspection inspection execution condition setting button 102, Implementation conditions are set.

The inspection inspection condition setting means 1 sends an inspection inspection item extraction command 31 to the inspection inspection item extraction device 2 together with inspection inspection execution condition information. Patrol inspection item extraction means 2
Extracts from the inspection inspection item file 11 the inspection inspection item that is the target of the received inspection inspection execution condition information.

In accordance with the patrol inspection item display command 32 sent from the patrol inspection item extraction means 2, the patrol inspection data input means 3 displays the extracted patrol inspection items on the display input section 21, and according to the displayed patrol inspection item. The result of the inspection inspection performed is input from the display input unit 21.

The inspection inspection result data input screen 200 of FIG.
FIG. 4 shows an example of an inspection inspection result input screen in the inspection inspection result data input means 3.

According to the patrol inspection data storage command 33 from the patrol inspection result data input means 3, the patrol inspection data storage means 4 stores the patrol inspection result in the patrol inspection data file 12 together with the patrol inspection execution condition information.

A patrol inspection data file structure 300 shown in FIG.
Shows an example of the file structure of the inspection inspection data file 12. When the inspection inspection result is stored, not only the inspection inspection result data but also the inspection inspection execution condition set by the inspection inspection execution condition setting unit 1 is saved as the inspection inspection data header.

When the patrol staff (operator) completes the input of the inspection result data of the carried out patrol inspection once, and the inputted patrol inspection result is stored in the patrol inspection data file 12, the facility diagnosis execution requesting means. 5 requests execution of equipment diagnosis.

The diagnosis processing control means 6 receives the equipment diagnosis execution request command 34 from the equipment diagnosis execution request means 5, and receives the inspection inspection result data used for the equipment diagnosis together with the inspection inspection execution conditions and the like. Take out more.
On the basis of this inspection inspection execution condition, equipment diagnosis rules that match the inspection inspection execution condition are extracted from the diagnosis rule group file 13, and the reference value data used for diagnosis is extracted from the diagnosis reference value file 14.

5 and 6 show a diagnostic rule group file 1
3 and the diagnostic reference value file 14 is an example of the file configuration, and the diagnostic rule group file configuration 400 stores the diagnostic rule data of the plant equipment set for each inspection inspection execution condition. 13 stores reference value (formula) data for making a comparison determination with the inspection inspection data which is a measured value when performing diagnosis.

The diagnostic processing execution means 7 receives the equipment diagnostic processing execution command 35 from the diagnostic processing control procedure 6, and uses the inspection inspection result data, the reference value data, and the equipment diagnostic rule extracted by the diagnostic processing control means 6. The diagnostic process is performed and the diagnostic result is saved in the diagnostic result file 15. Here, the diagnosis process is a value of the inspection inspection result data, which is a measured value (when the reference value is the upper limit value), by comparing and determining the inspection inspection result data extracted by the diagnosis process control means 6 and the reference value data. Whether or not exceeds the reference value data, and further combine the causal relationship with the judgment results of other inspection inspection items by logical sum (OR operation), logical product (AND operation), etc. The equipment status is determined.

The equipment diagnosis result display means 8 receives the equipment diagnosis result display command 36 from the diagnosis processing execution means 7, retrieves the equipment diagnosis result stored in the diagnosis result storage file 15 and displays it on the display input section 21. This prompts the patrol staff (operator) to confirm the status of the constituent equipment of the plant equipment. The patrol (operator) confirms this result,
If any signs of abnormality are observed, take further measures such as further detailed inspections or repairs.

The diagnosis result display screen 500 of FIG. 7 is an example of displaying the equipment diagnosis result displayed by the diagnosis result display means 8, and in addition to the equipment diagnosis result determination display screen 501,
Related data display screen 502 and facility diagnosis history display screen 50
3 and guidance display screen 5 for repairing abnormal areas
04 is also displayed.

In this way, the diagnostic rules corresponding to the inspection inspection execution conditions are prepared, and the equipment diagnosis is performed by automatically extracting the diagnostic rules corresponding to the inspection inspection execution conditions according to the equipment diagnosis execution request. As a result, it is possible to perform the optimum equipment diagnosis for the contents of the inspection inspection and improve the diagnosis accuracy.

In the above embodiment, the inspection inspection result is input from the display input unit 21, but the inspection inspection data extracting device 2 is equipped with an inspection inspection data input device using a handy terminal or the like. The inspection inspection items are sent to the inspection inspection data input device by means of transmission, etc., the inspection inspection result data is input from the display input section in the inspection inspection data input device, and this data is transmitted to the power generation plant equipment. It is also possible to send to a patrol inspection data file in the diagnostic device, and thereafter perform equipment diagnosis by the same procedure as in the embodiment.

Further, in the above-mentioned embodiment, a patrol inspection in a hydroelectric power plant is taken as an example, but it is also applicable to equipment diagnosis for inspection results of general industrial plants as well as power plants such as thermal power plants and nuclear power plants.

[0036]

As described above, according to the present invention,
A diagnostic rule is set for each inspection inspection execution condition (for example, type and items to be implemented if necessary), and the diagnostic rule according to the inspection inspection execution condition used in the inspection inspection is used as appropriate to suit the situation. Since the equipment diagnosis using the optimal diagnosis rule can be realized, the equipment diagnosis can be performed with high accuracy.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an exemplary embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a display example of a patrol inspection execution condition setting screen by the patrol inspection execution condition setting means in FIG.

3 is an explanatory diagram showing a display example of a patrol inspection result data input screen by the patrol inspection result data input means in FIG. 1. FIG.

FIG. 4 is an explanatory diagram showing an example of the structure of a patrol inspection data file stored by patrol inspection data storage means in FIG. 1.

5 is an explanatory diagram showing an example of a configuration of a diagnostic rule group file in FIG.

6 is an explanatory diagram showing an example of the configuration of a diagnostic reference value file in FIG.

FIG. 7 is an explanatory view showing an example of a diagnostic result display screen by the equipment diagnostic result display means in FIG.

[Explanation of symbols]

 1 inspection inspection execution condition setting means 2 inspection inspection item extraction means 3 inspection inspection result data input means 4 inspection inspection data storage means 5 equipment diagnosis execution request means 6 diagnostic processing control means 7 diagnostic processing execution means 8 equipment diagnosis result display means 11 inspection Inspection item file 12 Patrol inspection data file 13 Diagnostic rule group file 14 Diagnostic reference value file 15 Diagnostic result file

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazunori Toda 1-1-1, Shibaura, Minato-ku, Tokyo Inside Toshiba Headquarters office (72) Inventor Kazuya Mori 1-1-1, Shibaura, Minato-ku, Tokyo No. 1 Inside Toshiba Headquarters Office (72) Inventor Shigenobu Shirata 1 Toshiba Town, Fuchu City, Tokyo Inside Fuchu Factory, Toshiba

Claims (1)

[Claims] Claims: 1. Based on the process data from each sensor installed at a predetermined location of the plant, and the measurement data obtained by patrol inspection of the plant equipment, the presence or absence of abnormality in the equipment of the plant or the presence or absence of abnormality sign is diagnosed. In the plant equipment diagnostic device to perform, inspection inspection execution condition setting means for setting the execution conditions at the time of performing the inspection inspection, and the inspection inspection target items according to the execution conditions set by the inspection inspection execution condition setting means And a patrol inspection result data input means for inputting patrol inspection results collected regarding the patrol inspection items extracted by the patrol inspection item extraction means, and the patrol inspection result Patrol inspection data storage means for storing inspection data input by the data input means in a patrol inspection data file, Equipment diagnosis execution requesting means for requesting execution of diagnosis of the equipment, and based on a request from the equipment diagnosis execution requesting means, read the inspection inspection data from the inspection inspection data file, and further perform the inspection inspection The diagnostic processing control means for reading a diagnostic rule corresponding to the condition set by the condition setting means from the diagnostic rule group file and the reference value data used for diagnosis from the diagnostic reference value file, and the diagnostic processing control means. Based on the read diagnostic rule,
Diagnosis is performed by comparing the inspection inspection data with the reference value data, and a diagnostic processing execution unit that saves the diagnostic result in a diagnostic result file, and reads the diagnostic result saved in the diagnostic result saving file, A plant facility diagnostic device comprising: facility diagnostic result display means for displaying.