JPS62247449A - Method and device for guidance of plant maintenance job - Google Patents

Abstract

PURPOSE:To prevent the interference between repair jobs and at the same time to reduce the operator load by displaying the method and procedure as the guidance information to prevent or avoid such a repair job that affects other jobs and the plant operating conditions. CONSTITUTION:A working procedure propriety evaluation control part 13 uses the data stored in a memory part 11 to start an influence presence/absence deciding part (interference presence/absence evaluation part) 15, an influence prevention deciding part 16, a substitute machine operation deciding part 17 and a working method change deciding part 18 respectively. Thus it is decided whether or not the corresponding repair job of a plant 4 affects the working conditions of other repair jobs and the plant operating conditions. If so, another method and procedure is obtained to avoid said influences. Furthermore the change of the relevant working method is checked for decision if it is impossible to present the influences. Then these check/decision results are displayed on an output device 2.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a guidance method and device 1 for plant maintenance field work, and in particular, to a guidance method and device 1 for plant maintenance field work, particularly when maintenance work such as inspection and repair does not affect other maintenance work or plant operation. The present invention relates to a plant maintenance work guidance method and device suitable for displaying work methods and procedures to guide operators.

[Conventional technology]

Conventionally, in order to operate and manage plants such as chemical plants and power generation plants, in addition to normal operation, maintenance work such as inspection, repair, and testing of systems and equipment within the plant must be carried out in a planned and efficient manner. There is a need. In particular, large-scale plants such as nuclear power plants have complex configurations and include a large number of systems and equipment, so the types and contents of maintenance work are diverse, and many f′Fs are required in many systems and locations within the plant.
, operations are often carried out in parallel.

In order to carry out multiple maintenance operations in parallel, it is necessary to thoroughly confirm in advance that these repairs will not have a negative effect on each other. To do this, operations associated with individual work, such as turning on the power and opening/closing valves, can be adjusted to set conditions for other works, such as turning off the tS of the equipment and working in a stopped state, or closing valves on piping to isolate it from other systems. It is necessary to investigate in detail whether there is any immersion in the work being carried out.

Conventionally, in this kind of plant maintenance management, 2@ Senior operators such as shift supervisors and shift supervisors check the operating status of plant systems and equipment, the content and time of maintenance work, etc. to determine whether there is any interference between tasks and to determine whether there is any interference with plant operations. We judge the impact, etc., and grant work permission if there are no problems σJ. In addition, as a method for determining which system/equipment in the plant is affected by the operation of equipment associated with work, for example, the plant σ,) operation guidance described in Japanese Patent Application Laid-Open No. 172701/1983 is available. method is known. But this σ
) method uses a cause-and-effect tree (OCT) to describe the spread of events based on abnormalities, accidents, etc., and all routes and sequences of event spread are mapped out in advance for pre-specified events. It is.

[Problem that the invention seeks to solve]

The conventional technology described above has a problem in that it is nearly impossible to describe in advance the influence of operations associated with the work because the systems and equipment targeted for the maintenance work and the work contents are diverse. Furthermore, when senior drivers judge whether or not to carry out work, they need to manage a large amount of information and the details of the judgment are complex, making it difficult to make accurate judgments.
There were problems such as the amount of effort required to manage documents related to a large number of tasks and the content of handovers between shifts becoming complicated.

The purpose of the present invention is to manage information related to plant maintenance management and to prevent maintenance work such as one inspection or repair from having a negative impact on other maintenance work or plant operation by displaying work methods and procedures that can be carried out. An object of the present invention is to provide a plant maintenance work guidance method and device that effectively support plant maintenance management.

[Means for solving problems]

The above purpose uses data related to systems, equipment configurations, connection relationships, alternative equipment, etc. that are stored and managed in storage devices necessary for plant maintenance management, as well as maintenance work content, equipment operation impact data, etc., and plant status input data. A calculation processing device is used to determine whether the specified maintenance work violates other work or plant operating conditions, and if the specified maintenance work violates other work or plant operating conditions, it is determined whether or not the specified maintenance work violates other work or plant operating conditions. Equipment to do? Specified maintenance is carried out by determining whether or not there is a replacement machine for the equipment to be repaired, and by determining whether or not the requested equipment operations can prevent the effects of the equipment operations during maintenance work from spreading. The work is accomplished by a method and apparatus having means for determining and displaying work methods and equipment operating procedures without intruding on the work or plant operating conditions.

[Effect]

According to the above method and arrangement, the operator can carry out specified maintenance work using work methods and equipment operating procedures that avoid affecting other work or plant operating conditions.

[Implementation row]

Embodiment 1 of the present invention will be described below with reference to FIGS. 1 to 11.

FIG. 1 is a T system configuration diagram showing an embodiment of the plant maintenance work guidance method and apparatus according to the present invention. !
! In FIG. 1, 1 is an input device, 2 is an output device (display device), 3 is a storage device, 4 is a plant, and 5 is a calculation processing device. Further, within the calculation processing device 5, 11 is a storage section, 12 is a storage section;
is the plant status input section (plant status data addition device)
, 13 is a work procedure feasibility evaluation regulation section, 14 is a display data editing section, 15 is an influence influence judgment section (interference presence evaluation section),
16 is a Fi effect influence prevention determination section, 17 is an alternative machine operation determination section, and 18 is a work method change determination section.

Work content data for the maintenance work, plant equipment data, etc. are input from the input section fill. The storage device 3 stores work content data of maintenance work already in progress and scheduled maintenance work as information necessary for plant maintenance management.
Standard 1 work content data, non-standard work content data, Bradt circle system/equipment configuration/connection relationship (connection relationship)/function/
It stores data related to alternative machines, operation impact data and impact ripple data associated with maintenance work, display screen data, and programs necessary for calculation processing. Plant status input section (plant status data addition @ electricity) 12Fi Inputs status data of the plant 4 system/equipment. The data from the input device 1 and the storage device 3 are input to the calculation processing device 5, and the status data of the plant 4 is input via the plant status input unit 12. The influence is evaluated, f'F, and a work method/procedure for avoiding the influence spread (interference) between the beams is determined and displayed on the output device #2 together with the single-manpower data.

Inside this calculation processing device 50, data from the input device 1 and storage @ 3 are stored in the data tube storage unit 11, and data input from the plant 4 via the plant status input unit 12 is also stored in the storage Mll. Then, those data are displayed in the display data II collection section 14. The data is collected and sent to the output device 112. Also, there is a work procedure evaluation system! Using the data stored in the l513Fi storage unit 11, influence ripple presence/absence determination unit (interference presence/absence evaluation unit)]5. Impact Spread Prevention Determination Department】61
Alternative machine operation determination unit 171 activates work method change determination unit 18 as necessary. In addition, it is determined whether the maintenance work in 29 Plant 4 infringes on the working conditions of other maintenance work or the brat operating conditions, and if the conditions are violated, the influence of the equipment operation of the relevant maintenance work will spread. Find the equipment along the route and determine whether the influence of the maintenance work can be prevented by operating the equipment f'F and VC, and then find a replacement for the target system/equipment of the maintenance work. Is it possible to prevent the effects of device operations from spreading when switching to an alternative device?
Q) If the impact can be prevented from spreading, it is determined whether the specified maintenance work violates the working conditions of other maintenance work or the operating conditions of the plant. Search for work methods and procedures that do not affect maintenance work conditions or plant operating conditions, and if it is not possible to prevent the effects from spreading, investigate and determine changes to work methods, and display and edit the results. The display data T0 is sent to the unit 14.The unit 14 displays the PM business method and manual on the output device 2 together with the result of determining whether or not the work is possible as a maintenance work permission condition.

FIG. 2 #: is a simplified flowchart of the calculation processing procedure of the work procedure feasibility evaluation system @ section 13 of the calculation processing device 5 of t@1. In FIG. 2, a process 21 is a work content input process, in which work content data of the specified maintenance work and plant equipment data are inputted from input 4i in FIG.
Store in. If the maintenance work is a regular work such as a regular test, one work content is determined in advance, so the work content is stored in the storage device 3 as standard work content data, and it is selected and stored in the storage device 3. 11. Processing 22 includes data on currently ongoing maintenance work and scheduled maintenance work from the storage device 3, as well as plant system and data.
Storage unit for various data such as device connections and alternative devices]
This is a read process to l. Process 23 is stored in the display screen editing display (basic screen) process! The maintenance work content data, plant system diagram, etc. of 1511 are displayed on the output ii & 2 from the display data editing section 14 in accordance with the fixed screen. The following shows the structure of the arithmetic processing contents that the work procedure feasibility evaluation system #J section 13 executes by activating the influence spread judgment section 15 or the work method change judgment section 18 as necessary.

In process 24, the time slots of the maintenance II work and all other maintenance work in progress and scheduled to be performed are compared to check for overlap in work time slots. If there is maintenance work that overlaps with this work time period, in process 25, the effect ripple effect determination unit 15σ is activated to ensure that the influence of all the overlapping equipment operations associated with the maintenance work is reflected on the work conditions of other maintenance work. Evaluate and determine whether or not this will affect plant operating conditions. Note that a detailed flowchart of the process 25 is shown in FIG. 6 later.

If none of these apply, V'cd, the subsequent processing is unnecessary, and the evaluation result is displayed on the output device 2 as guidance information. If there is a repercussion in process 25, a work method to avoid the repercussion is searched for in the subsequent process.

In process 26, by activating the effect spread prevention determination unit 16, it is determined whether there is any equipment, such as a valve or switch, that can prevent the effect spread in the path connecting the target T equipment for the maintenance work and other maintenance work. is evaluated and determined using data on the connection relationships and operating conditions of the plant's systems and equipment. If there is a device that prevents the influence from spreading, it is determined in step 27 whether or not the influence will spread to the working conditions of other maintenance work or the operating conditions of the plant. In other words, evaluate whether the effects associated with the operation of the equipment violate all other overlapping maintenance work conditions, the operating conditions of the target equipment in the industry, and the operating conditions of the plant.
If the maintenance work is carried out after operating the equipment, then all other overlapping maintenance work and brat operation conditions are required. Evaluate and determine whether or not it will be violated. As a result, if the operation of the equipment can be completely prevented from having any influence due to the operation of the target equipment of the maintenance work, in process 28, it is determined whether or not the work is possible as a condition for permitting all work such as the operation procedure of the equipment. The result is displayed on the output device i2 as guidance information. Further, if there is no equipment to prevent the influence from spreading in process 26, or if other maintenance work or plant operation conditions are affected in process 27, VC searches for a substitute for the target equipment of the maintenance work in the subsequent process.

In process 29, the substitute machine operation determination unit 17 is activated to evaluate and determine the presence or absence of a substitute machine using data related to the substitute machine VC of the plant system and equipment. If there is an alternative device for the target equipment of the maintenance work, in step 3, it is determined whether there is any influence on all other overlapping maintenance work or plant operation conditions. In other words, evaluate whether the effect of switching to the alternative machine will violate the working conditions of the target equipment and plant operating conditions in all other overlapping maintenance work, and then switch to the alternative machine. Perform the relevant maintenance work after *7
S: Evaluate and determine whether or not the case violates the conditions for all other overlapping maintenance work and plant turnover. As a result, if it is possible to prevent the influence of the operation of the maintenance f8: target@device by switching to an alternative machine, in step 31, it is determined whether or not work is possible using the switching operation procedure of the alternative machine as a work permission condition. It is displayed on the output device 2 as guidance information together with the determination result. Also, if there is no alternative device in process 29.

Furthermore, if other maintenance work or brat operation conditions are violated in process 30, it is checked whether the work method can be changed in the subsequent process.

In process 32, the work method change determination unit 18 is started to determine a change in the work method using the non-standard work content data, and the work method change determination unit 18 is activated to determine a change in the work method using the non-standard work content data. Data related to the equipment targeted by the maintenance work is searched from data related to non-standard work that summarizes operations to be performed.

If there is any data related to the equipment targeted for the maintenance work, please contact us! In step 33, it is determined whether there is any impact on pond maintenance work or plant operation conditions. In other words, evaluate whether the effects of performing the non-standard work operation violate the working conditions of the target equipment in other maintenance work or the operating conditions of the plant. Evaluate and determine whether or not this violates all other overlapping maintenance work and brat operation conditions. As a result, if the operation of the non-standard work can prevent the influence 4Ia caused by the operation of the target equipment of the maintenance work, in step 34, the operation procedure of the non-standard work is set as a work permission condition and the work is determined as possible. Along with this, output device f as guidance information.
Displayed on 12.

Mata-dokoro! vCti if no work method or procedure can be found to prevent the influence of the maintenance work from spreading even under 32.

In process 35, the work execution time of the maintenance work is changed. Then, in process 35, the process returns to process 24 to check whether the work time slots overlap after the change. In this way, from process 24 to process 3
Steps up to 5 above should be carried out for all other maintenance work in progress and scheduled to be carried out.From rC, the work permission conditions for carrying out the maintenance work should be used as guidance information along with the work feasibility determination results. Display output device @2VC. Above is the calculation processing bag #50 for the first bacteria, work procedure feasibility evaluation control unit 1
3 will explain the outline of the processing, and 2 will explain the system and system of plant 4.
The processing contents of a specific example of equipment maintenance P+:* will be explained in detail.

Figure 3 shows the turbine granod steam evaporation 6 of the boiling water nuclear QLF plant of plant 4 in Figure 1. % schematic system diagram (piping instrumentation diagram). This system is a system to prevent air leakage from the turbine to the condenser and steam leakage from the main steam valves and the granoid section of the steam valves of the feed water pump driving turbine. In Figure 3, E-1 is an evaporator, S-1 is a double water make-up water system, S-2 is an in-house boiler system, and S-
3 is a turbine gland seal system, S-4fl extraction and main steam system, and S-5 is an evaporator drain tack.

Also, I-1 and I-2 are pressure gauges, and Knee 3 is a water level gauge.

C-1-03#i controller, BP-1 to BP-3 are electric air exchangers, ■-1 to V-16 are valves, Yl-'! @4 junction junction.

In this system, Tlc always uses the steam generated in the evaporator E-1 as the steam supplied to the turbine gland seal system s-3, but when the reactor pressure is low, the steam generated in the in-house boiler system S-3 is used.
2 steam is used. Also, the turbine gland seal system S-
In order to maintain the steam pressure supplied to 3 at a constant pressure, the pressure gauge I
-1 pressure signal is used to operate valve V-1 via controller C-1 and electro-pneumatic converter EP-1rr-, or pressure dip of pressure gauge I-2 is used to operate valve V-2. The pressure is controlled by operation. In addition, in order to keep the water level in the evaporator E-1 constant, the water level signal from the water level gauge I-3 is used to send the water level to the valve V via the controller C-3 and the electric air converter EP-3.
-3 is operated to control the water level.

In this Tarpier Grand steam evaporator system.

For example, the pressure control system from pressure gauge I-1 to valve V-1, which controls the steam pressure pipe to Terpino gland seal system S-3, has broken down and repair work is currently underway. Suppose there is. In this case, the working method is valve V-1.
1. Close V-12 and open bypass valve V-13 to avoid large fluctuations in steam pressure.
Maintenance work is carried out while the plant continues to operate by monitoring the make-up water flow rate and heating steam amount. At this moment in time, for example, valve V-3 of the water level control system, which controls the water level of evaporator E-1, has malfunctioned.

It is assumed that the water supply flow rate decreases and the water level in the evaporator E-1 begins to gradually decrease. Then, the driver usually sees the phenomenon of water level drop and determines where the problem is. In order to understand this, we perform maintenance and inspection work by sequentially operating RC equipment on each device, and one of them is the water level control system valve V-
There is work to manually operate 3 to change the water supply flow rate. If all valves other than valve V-3 are normal, there is no problem with this maintenance/inspection operation Mn.

However, if the pressure system including valve V-1 is not operating normally, the water level will rise and the steam pressure will decrease when the water supply flow rate to evaporator E-1 increases rapidly. The pressure in seal system S-3 has decreased, and equipment operations during maintenance and inspection work on the water level control system have been affected by the ongoing maintenance work on the pressure side (toward) system where the steam pressure remains constant and the plant operating conditions. The results will have an impact.

While the repair work for the pressure control system failure including valve V-1 of the turbine gland steam evaporator system of the plant shown in Figure VC43 was in progress as other maintenance work, a new problem occurred in the evaporator E-1. Operation of equipment such as valve V-3 of the water level control system in maintenance inspection work as part of the maintenance work to investigate the cause of water level abnormality is other maintenance work such as keeping the steam pressure to the turbine gland seal system 8-3 constant. The details of the processing of each part of the 70-chart in Figure @2 will be explained using a specific example of the case where the conditions and the operating conditions of the plant are changed.

First, process 21#"1 Input data of maintenance work and plant equipment data are input to the maintenance inspection f' of the evaporator water level control valve V-3σJ of the turbine granule steam evaporator system TGS specified from the input section fill. is input and stored in the storage unit 11. Processing 22 extracts ongoing maintenance work content data, planned maintenance work content data, standard work content data, plant system/equipment connection information data, impact ripple data from the storage i & storage 3. Data, substitute machine data, display screen data, non-standard work data, etc. are read into the storage unit 11.The specific contents of these various data will be explained in related sections.

After reading these data, in step 23, basic screens such as the maintenance work content data and the plant system diagram are displayed on the output device 2.

The fourth meat is an example of the display screen of the output device 2 in Figure 1 (basic screen)
FIG. 4th Fi! In J, 40 is the output device screen, 41 is the maintenance work content display section, and 42! 23 is an example in which four types of information are displayed on each of the four display sections of the output device screen 40, and the frames and headings of each display section in Figure 1 are fixed screens and are prepared in advance and stored in the storage section. Fixed screen display screen data stored in #3?
It will be displayed as is. Maintenance - business size display f! 1A41Ka
The work content data of the maintenance inspection work of the TGS evaporator layer control valve V-3 of the maintenance work entered in process 21 is displayed. TGSM of the system targeted as this work content data
In addition to changing valve V-3 of system 1 equipment, work time, and setting value of controller C-3 of @equipment operating procedure, and manually changing the valve opening of valve V-3, the maintenance VF, The pressure fluctuation prohibition condition at the location (branch junction) Ys is displayed as the work condition (prohibition condition) that does not interfere with other maintenance work or plant operation conditions.In addition, the system diagram display section 42 displays the work condition (prohibition condition) that does not interfere with other maintenance work or plant operation conditions. The system diagram of the TGS evaporator stratification system (2) is displayed.

This system diagram is displayed by selecting the necessary system diagram display screen data prepared in advance and stored in the storage unit Wt3 and specifying it from the input device tx.

FIG. 5 is an explanatory diagram of a configuration example of the display screen data (main system and each system) of the output device 2 in FIG. g1 (FIG. 4). Figure 5 shows the main system including the entire plant and its respective systems in a hierarchical manner, showing each screen number and the location of detailed structure data in a frame format, and is stored in the storage device 3 as the hierarchical display screen data of the system diagram. be remembered. For example, the third
The screen numbers related to the entire system of the turbine gland steam evaporator system in the specific example shown in the figure are shown in FIG. 33 in FIG. shows. Furthermore, the frame of this TGS-1 divides the turbine gland steam evaporator system into several systems, and shows the screen number and frame name for storing detailed structural data of each system. In this way, the system diagram display section 42vc of the 1g4 diagram was designated as the maintenance work concerned.
Screen number FI of evaporator water level control system of TG8-1 in diagram J5
The system diagram of G-33,3 is displayed. Note that at this point, the work permission determination result display section 43 and work permission condition display section 44 in FIG.
Additional display will be made in 4.35. This completes the display processing of the display screen editing display (basic screen) in process 23, and then the process 24
Check whether the work time periods of the maintenance work overlap with other maintenance work, and if one work time period overlaps, in step 25, the maintenance work is included in other ongoing maintenance work and scheduled maintenance work. Determine whether or not it affects the conditions and plant operating conditions.

FIG. 6 is a flowchart of an example of a process procedure for determining the presence or absence of influence in process 25 of FIG. In FIG. 6, in step 61, the starting point X and ending point Y of the Kageso comprehensive evaluation are set.

The starting point X is set by selecting a device T to be operated in the maintenance work, and the ending point is set by selecting a device or branch point (location) under the work conditions of another maintenance work. These are obtained from the content data of maintenance work.

Structure Figure 7 is an explanatory diagram of an example of the structure of the maintenance work content data in Figure 1 (Figure 3). Figure 7 is a TG of other ongoing maintenance work.
8 Steam pressure control valve repair work is expressed in a frame format, and the content data of the ongoing maintenance work is stored in the storage device 3.
is memorized. This ongoing maintenance work content data includes system equipment I TG8 steam steam pressure system/valve V-1 targeted for explosives.
) l'lii business time 1 work east procedure operating equipment/influence (valve v
-13 opening.

This ongoing maintenance fI is used as one work condition (thread lifting condition) along with the data of valve V-11 closed, valve V-12 closed, flow rate fluctuation)
r, conditions are set to prohibit pressure fluctuations at the branch point (location) y3, which is necessary for Chestnut not to violate other maintenance work or plant operation conditions. In addition, the maintenance work content data for the maintenance and inspection work of the TGS evaporator water level control valve V-3 of the TGS evaporator water level control valve V-30J, which was entered from the manual bag ill, includes the equipment operation procedure. This includes manual operations such as changing the valve opening. Therefore, these ongoing maintenance 1'
N: Set the water level control valve V-3 as the starting point X and set the branch point y3 as the ending point T based on the work and the maintenance work content data. Next, in process 62 in Figure @6, system/equipment 1!
Get a list of connections. This is the system within the plant.
It can be created using data regarding device configuration and connection relationships.

@Figure 8 is an explanatory diagram of an example of the configuration data of the plant system in Figure 1 (Figure 3). FIG. 8 shows the configuration of the turbine granule steam evaporator system of the plant in a frame format, and is stored in the memory length fi13. The configuration data of this system includes externally input condensate make-up water system S-1. In-house boiler system S
-2, External output turbine ground cooling system S-3% Equipment type, connection list, etc. are shown, and from the connection list included in this configuration data, the necessary connection relationship λ from the starting point X to the ending point Y is calculated. Create. Next, process 6 in Figure 6
In Step 3, go through the list of connections in order, take into account the status of devices such as valves and switches, and move from the starting point X to the ending point Y set earlier.
Evaluate the connection relationship to see if it is connected. If gIS+connection status)vc is present between connections, the corresponding security 416 is determined based on the impact data and impact ripple data in process 64.
Is there a negative impact on the product A1 of the equipment targeted by the f'V industry? evaluate.

1f) The impact ripple data shows the 8th section of cause and effect.
Express it as a then format rule. An example of this is shown below. Pressure, $Y, $Z)) The meaning of this form is ``If the flow rate Vc shadow I$z at location $X occurs, and location $X is connected to location $Y, and location $ If the fluid (thing lx) in Y is steam, the location $
The influence $2 spreads to the flow rate at Y, and the influence $2 spreads to the pressure at location $Y.

The above symbols $X, $Y, $ZKfl can be any arbitrary character strings. Of the propositions in the conditional part of this format, the connections gk have already been found in process 62. In addition, the response operations for maintenance work such as repair work in the event of a breakdown are determined for each individual system/equipment, and the TGSM pressure pressure range for ongoing maintenance work is determined.
Valve side-1 repair P1: Chestnut's corresponding operation and influence data are the 7th
As illustrated in the figure, it is required that Rt fluctuates from these maintenance work content data. Moreover, the type of fluid is determined to be steam from the output amount (1) of the external output of the system configuration data in FIG. Therefore, as a conclusion of this rule, it is required that the flow rate and pressure at location y3 change mT.

Next, in process 65 of FIG. 6, the evaluation result of the influence ripple effect of the target equipment operation in the maintenance work in the above process 64 is compared with the work conditions (prohibited conditions) of other maintenance work at end point Y. Other ongoing maintenance work on TGS steam pressure control valve V
The working conditions for the -1 repair fs work are shown in Figure 7.T maintenance fsF
, the work of the business content data matches the evaluation result of the process 64 above. Therefore, in process 66, the result of determining the presence or absence of influence is determined to be influence influence (violates other maintenance work conditions and plant operating conditions).In addition, in process 65, the influence of the equipment operation of the maintenance work is determined by other maintenance work at end point Y. If the work conditions (prohibition conditions) do not match, the r/c determines in process 67 whether or not it has evaluated whether or not there is any influence on all equipment operations that are subject to the maintenance work, and If there is an operation, processes 61 to 67 are repeated again.If all equipment operations have been evaluated in process 67, in process 68 all ongoing maintenance operations that overlap with the maintenance P1: It is determined whether or not the presence or absence of influence has been evaluated for the combination of scheduled maintenance operations, and if there are other maintenance operations, processes 61 to 68 are repeated again.Then, all other maintenance operations are evaluated. If so, in step 69, the result of determining the presence or absence of influence of Shadow-11 is determined as (without affecting other maintenance work conditions or plant operating conditions).

The thus obtained evaluation determination result of whether or not the maintenance work has an influence on the equipment operation is additionally displayed as guidance information on the work feasibility determination result display section 43 of the output atj# screen 40 of the output device 2.

Figure 1O shows the display screen 4 of the output device 2 in Figure 1 (Figure 4).
Guide 7 of work availability determination result display section 43 7
711 display example. Figure 10 shows whether or not the equipment (valve V-3) can be operated (large opening degree) during the maintenance and inspection work of the TGS evaporator layer control valve V-3 in the above-mentioned maintenance work and the reasons why. (Pressure fluctuation at location y3) is displayed. In this way, if the result of determining the presence or absence of influence is that there is influence, it is possible to improve the operator's understanding by displaying which other maintenance work conditions (prohibited conditions and plant operating conditions) were matched. It is possible to do so.The processing procedure for determining the presence or absence of influence in the processes 27, 30, and 33 of the second FXJ is similar to the procedure for determining the presence or absence of influence in the process 25 in FIG.

In the next 2nd process 26, the influence spread prevention judgment, the 6th
In process 62 of process 25 in the figure, f''F, 1i from the released starting point X to the ending point Y! Evaluate and determine whether there are any devices in the list of connections that can prevent the influence from spreading, such as valves or switches. In the case of maintenance work, check whether the equipment in the connection list of the configuration data of the turbine gland steam evaporator system in Figure 8 corresponds to the equipment VC that is judged to prevent the influence from spreading. If so, it is determined whether the state, for example, the open/closed state of a valve or switch, can be reversed.

If the determination result indicates that the reversing operation is possible, in step 27 it is determined whether or not the reversing operation of the applicable device has an influence or not, by evaluating and determining the presence or absence of influence in the process 25 described above. In other words, in process 27, a reversing operation of the relevant equipment is set as the equipment operation for the relevant maintenance work, and the reversing operation of the relevant equipment affects the working conditions (starting conditions) of all other overlapping maintenance ha and the brat operating conditions. Evaluate whether it will spread or not. If the result of this evaluation is that there is no influence from the reversal operation of the equipment, then the work conditions of all other overlapping maintenance work and plant operating conditions will be evaluated in the event that the original maintenance work is carried out after the reversal operation of the equipment. Evaluate and determine whether or not the impact will spread to other countries. If the result of determining the presence or absence of influence spread is that there is no influence, in process 28 work is permitted on the display screen 40 of the output device 2 in FIG. Guidance information is additionally displayed on the condition display section 44. In the case of maintenance and inspection work of the evaporator water level control valve V-3 in the maintenance work, the bypass valve V of the TGS steam pressure control system is installed as Fi applicable equipment between the above starting point X and the ending point Y at location y3. -13, and since this bypass valve V-13 is in the open state, it can be reversed to the closed state, but if the reverse operation is performed to the closed state, the steam will not go to the end point Y (branch point) y3. does not match the work conditions (prohibited conditions) at the end point YFJ.

Therefore, the result of the impact 411 determination in process 27 is that there is influence, and the primary process 29 determines whether there is an alternative device.

FIG. 9 is an explanatory diagram of an example of data related to an alternative machine in the plant of FIG. 1 (FIG. 3). Figure 9 shows a replacement plant for the TGS pressure control system at the plant (4 boats, 4 boats, and 4 boats undergoing maintenance work).
Evil 1 Elementary German, 2 Wisdom Melon / -fi J Bus Valve V-13
- Evaporator pressure rating, valve V-1 closed.

Valve V-13ga) and TGS evaporator system alternative system/operating conditions (in-house boiler system S-2/in-house boiler pressure rating, valve V-1 closed, valve V-13 closed, valve V-2 open, etc.) ] is expressed in a frame format.In process 29, the presence or absence of a substitute machine is determined by searching the prepared related data of the substitute machine, which is predetermined from the viewpoint of plant operation, as shown in Fig. 9. If the determination result indicates that there is an alternative device, it is necessary to operate the device that satisfies the operating conditions of the alternative device as illustrated in FIG.
The presence or absence of influence is evaluated and determined using the same processing procedure as the above process 25 for determining the presence or absence of influence. T or processing 3
Set the switching equipment operation of the alternative machine as the equipment operation for the maintenance work in 0, and the switching equipment operation of the 1 alternative machine will have a ripple effect on the work conditions (prohibited conditions) of all other overlapping maintenance work and the operating conditions of the plant. Evaluate whether it is T or not. Switch to a replacement device based on this evaluation result! II + - Shadow 411 If there is no ripple effect, it will be defeated.
'After operating the vr mbμ switching device, carry out the original maintenance work. 7S: Evaluate and determine whether or not the case will have a ripple effect on all other overlapping maintenance work and plant operating conditions. If the result of determining the presence or absence of influence is that there is no influence, guidance information is displayed in the work permission condition display section 44 of the display screen 40 of the output device 2 in FIG. Displays the teachings of the deceased. Evaporator water level control valve V- for the maintenance work concerned
In the case of maintenance point sn'' work of 3, as shown in Fig. 9, T
The alternative to the GS evaporator system is the station boiler system S-2, and its operating conditions are that the steam pressure control system valves V-1 and V-13 are closed at the station boiler pressure rating, and the station boiler system S-2 is closed.
- 2 manual steam pressure m control system valves V-2, V-14, V
-15, etc. are opened, so steam goes to the location (branch point) y3 of the end point Y, and the working conditions at the end point Y (frequent boarding)
Matches T. Therefore, the result of determining the presence or absence of influence in process 30 is shadow * no influence, so in the next process 31, the corresponding fee f
iIf The switching to the rocky shore and its operating conditions are displayed as work permission conditions in the work permission condition display section 44Vc of FIG.

Fig. 11 #:r is an explanatory diagram of an example of displaying guidance information on the work permission condition display section 44 of the display screen 40 of the output device 2 in Fig. 1 (Fig. 4). Conditions for permission to perform maintenance and inspection work on the TGSi converter water level control valve V-3 (alternative plant boiler system S-2)
switching to) and its operating conditions (internal boiler pressure rating, valve V-1 closed.

Guidance information for valve V-13 closed, valve V-2 open, etc.) is displayed separately. If switching to an alternative machine is not possible in the above processes 29 and 30, a change in work method is determined in 1cri process 32.

In the next process 32, non-standard work content data is searched to determine changes in the work method, and typical examples of this non-standard work method include maintenance and inspection work for various trip signal generation circuits in electrical systems. be. In this work method, a printed circuit board is treated as the equipment to be repaired, and it is checked whether a trip signal is normally generated from the printed circuit board. In that case, if you do inspection work with the system Vc installed, it will actually trip, so you should remove the relevant signal line and perform the inspection. However, simply removing the signal line will not restore the normal condition, so temporarily remove the shirt spur line. The equipment will be installed at Therefore, such work content data is stored together as non-standard work content data for the plant, and a work method change determination is made. If it is possible to change the work method based on the evaluation results, in process 33, the work procedure of the relevant work method is changed to the effect on the work conditions of all other overlapping maintenance work and the brat operating conditions using the same process as process 27. Evaluate whether there is any influence, and if there is no influence, change the relevant work operation procedure to 1.
! If the original maintenance work is carried out after the maintenance work has been completed, will there be a ripple effect from the working conditions of all other overlapping maintenance work and the operating conditions of the plant? Evaluated and judged 5jT. If the model number influence determination result indicates that there is no influence, in the second process 34, the change to the corresponding work method and the work operation procedure are set as work permission conditions, and the work permission conditions on the display screen 40 in FIG. Although it does not specifically explain high-speed processing,
When handling a large amount of data for an actual plant, it is possible to speed up the processing by separately using various high-speed processing algorithms such as the lute algorithm.

As described above, according to this embodiment, when performing maintenance work specified by Blatt, it is possible to search for equipment that is in the path where the influence of the maintenance work's operation on the 2 & a unit will spread, or to search for equipment that is the target of maintenance work Looking for a replacement machine.

Or request a change in the work method of maintenance work, and according to the requested equipment operation P'N:, the specified maintenance work can be changed to other work or plant operating conditions. You can display the guide/su information 1/&.

[Effects of the Invention] As explained above, according to the plant maintenance work guidance method of the present invention, maintenance work such as plant maintenance inspection work and repair work has a ripple effect on other works and plant operating conditions. Since the work method/procedure for determining whether to stop or avoid the maintenance work is displayed as guidance information, it is possible to prevent interference between maintenance work and reduce the burden on the driver.

[Brief explanation of drawings]

Fig. 1 is a system configuration diagram showing an embodiment of the brat maintenance gaidanos method and device according to the present invention, Fig. 2 is a schematic flowchart of the calculation processing procedure of the first decoy, and Fig. A schematic system ide diagram of the turbine grand steam evaporator system, Figure 4 is the I!5!I#1 diagram of the display screen inverted (basic screen) of Figure 1, and Figure 5 is the display screen data of Figure 4. An explanatory diagram of a configuration example, Figure 6 is a flowchart of an example of a processing procedure for determining whether or not the influence of second meat has spread, Figure @7 is an explanatory diagram of an example of the maintenance work content data configuration in Figure 41, and Figure 8 is a flowchart of an example of a processing procedure for determining whether or not the influence of second meat has spread. An explanatory diagram of an example of system configuration data, @9 diagram is an explanatory diagram of an example of Brat replacement machine data in Figure 1, 1g1O diagram is an explanatory diagram of an example of displaying the result of work availability judgment in Figure 4, @l1 diagram is an explanatory diagram of an example of !4 diagram It is an explanatory diagram of an example of displaying additional conditions for the business license town.l...Input device, 2...Output device, 3...Storage device, 4...Plant, 5...Calculation processing device, 11・
...Memory section. ] 2... Plant status input section, 13... 1 work procedure feasibility evaluation control section, 14... Display data editing section, 15...
- Influence ripple prevention determination unit, 16... Influence ripple prevention determination unit. 17... Alternative machine operation judgment unit, 18... Work method change size ¥2 Figure 5 Garden Fushi-A Slot..., h 7F t
,, ) "7'l-'l□-Graduation Otsu
Mehaya 7th 8th 10th Figure *11Z

Claims (1)

[Claims] 1. Determine whether or not maintenance work designated by the plant violates other work and plant operating conditions, and if the conditions are violated, the influence of the operation of the target equipment of the maintenance work spreads. Determine whether or not it is possible to prevent the impact from spreading by searching for equipment along the route and operating that equipment, or by finding a replacement for the equipment subject to maintenance work and switching to that replacement to prevent the impact from spreading. A plant maintenance work guidance method for determining and displaying work methods and equipment operating procedures that will ensure that specified maintenance work does not infringe on other work and plant operating conditions, by determining whether or not the specified maintenance work violates other work or plant operating conditions. 2. Determining whether the maintenance work specified by the plant input device violates other work and plant operating conditions based on the plant maintenance management data stored in the storage device and the plant state data imported from the plant state input means,
If the conditions are violated, find a device in the path where the effects of the operation of the equipment subject to maintenance work will spread, and determine whether the effects can be prevented by operating that equipment, or alternatively replace the equipment subject to maintenance work. By determining whether it is possible to prevent the impact from spreading by switching to an alternative machine and determining whether or not it is possible to prevent the impact from spreading, it is possible to find work methods and equipment operating procedures that do not infringe on other work or plant operating conditions. A plant maintenance work guidance device equipped with a calculation processing means that is displayed on an output device.