JPH0778788B2 - Plant maintenance work guidance device - Google Patents

Description

The present invention relates to a guidance method and apparatus for plant maintenance work, and in particular, 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 device suitable for displaying a method / procedure and guiding a driver.

[Conventional technology]

Conventionally, in order to operate and manage plants such as chemical plants and power plants, it is necessary to perform systematic and efficient maintenance work such as inspections, repairs, and tests of the systems and equipment in the plant in addition to normal operation. There is. In particular, large-scale plants such as nuclear power plants have a complicated configuration and include many systems and equipment.Therefore, the types and contents of maintenance work are diverse, and many works are performed in parallel in many systems and places in the plant. Often implemented.

When carrying out such maintenance work in parallel, it is necessary to fully confirm in advance that those works do not adversely affect each other. For this purpose, operations associated with individual work, such as turning on the power or opening / closing the valves, should be performed under other work setting conditions, such as turning off the power to the equipment and working in a stopped state, or closing the valves in the pipes to separate them from other systems. It is necessary to investigate in detail whether it does not violate the work.

Conventionally, in such plant maintenance management, senior operators such as shift supervisors and shift supervisors have an influence on the plant operation and whether there is any interference between the work depending on the operating state of the plant system / equipment, the content of the maintenance work, the time zone, etc. The work permission is given when there are no such problems. Further, as a method for determining which system / equipment in the plant is affected by the equipment operation accompanying the work for such a determination, for example, a plant operation guidance method described in JP-A-58-172701 is available. Are known. However, this method uses the method of describing the spread of events due to anomalies or accidents by the cause-result tree (CCT), and pre-assembles all the routes and order of event spread for the specified events. Is.

[Problems to be solved by the invention]

The above-mentioned conventional technique has a problem that it is almost impossible to describe in advance the influence spread of the operation associated with the work because the system / equipment targeted for the maintenance work and the work content are diverse. In addition, when a senior driver determines whether or not work can be performed, it requires a large amount of information management and the content of the determination is complicated, so it is not easy to make an accurate determination.
There were problems such as a large amount of labor required to manage documents related to a large number of operations, and the content of handovers during the shift became complicated.

The object of the present invention is to manage information related to plant maintenance management, and to display work methods / procedures that can be carried out by maintenance work such as inspection and repair without adversely affecting other maintenance work or plant operation. It is to provide a plant maintenance work guidance device that effectively supports maintenance management.

[Means for solving problems]

The above-mentioned purpose uses the data related to the system / equipment configuration / coupling / substitution, etc. necessary for plant maintenance management that is stored in the storage device and the maintenance work content / equipment influence influence data and plant status input data. The calculation processor determines whether or not the specified maintenance work violates other work or plant operating conditions, and if it violates the conditions, the equipment existing in the route where the influence of the operation of the target equipment of the maintenance work spreads. Or by determining whether or not there is a substitute machine for the maintenance work target device, and determining whether or not the influence of the maintenance work device operation can be prevented by the required device operation, The designated maintenance work is accomplished by a device having means for obtaining and displaying a work method / equipment operation procedure that does not violate other work or plant operating conditions.

[Action]

According to the above device, a work method that prevents the specified maintenance work from affecting the other work and the plant operating conditions.
It can be implemented by the driver according to the equipment operation procedure.

〔Example〕

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

FIG. 1 is a system configuration diagram showing an embodiment of a plant maintenance work guidance device 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, in the calculation processing device 5, 11 is a storage unit, 12 is a plant state input unit (plant state data acquisition device), 13 is a work procedure availability evaluation control unit, 14 is a display data editing unit, and 15 is an influence influence determination. Section (interference presence / absence evaluation section), 16 is an influence ripple prevention determination section, 17 is an alternative machine operation determination section, and 18 is a work method change determination section.

From the input device 1, work content data of the maintenance work, plant equipment data, and the like are input. The storage device 3 is information necessary for plant maintenance management, work content data of the maintenance work already underway and scheduled maintenance work, standard work content data, non-standard work content data, configuration / connection of system / equipment in the plant Stores relation (joint relation) / function / substitute data, influence data and influence ripple data of operation accompanying maintenance work, display screen data, and programs necessary for calculation processing. The plant status input unit (plant status data acquisition device) 12 inputs status data of the system / equipment of the plant 4. The calculation processing device 5 inputs data from the input device 1 and the storage device 3, and
The state data of is input via the plant state input unit 12,
The effect of the designated maintenance work on other maintenance work or plant operation is evaluated to find a work method / procedure for avoiding the influence ripple (interference) between the works, and the work method / procedure is displayed together with the input data on the output device 2.

Inside the calculation processing device 5, the data from the input device 1 and the storage device 3 is stored in the storage unit 11, and the data input from the plant 4 via the plant state input unit 12 is also stored in the storage unit 11. The display data editing unit 14 edits these data and sends them to the output device 2. Further, the work procedure availability evaluation control unit 13 uses the data stored in the storage unit 11 to determine the influence spread determination unit (interference presence / absence evaluation unit) 15, the influence spread prevention determination unit 16, the alternative device operation determination unit 17, the work method. The change determination unit 18 is activated as needed. With this, it is determined whether or not the maintenance work of the plant 4 violates the work conditions of other maintenance works or the operating conditions of the plant. If the conditions are violated, the influence of the equipment operation of the maintenance work spreads. When a certain device is sought and it is determined whether or not the influence of the maintenance work can be prevented by the operation of the device, or when a replacement device for the target system / device of the maintenance work is sought and switched to the replacement device. Judgment whether the influence of the equipment operation of the above can be prevented, and if that influence can be prevented, it is judged whether the operation of those equipment violates the work condition of other maintenance work or the operating condition of the plant. By doing so, a work method / procedure is required in which the specified maintenance work does not violate the work conditions of other maintenance work or the operating conditions of the plant, and if the influence cannot be prevented, the work method is changed. Examine and judge , And passes the results to the display data editing unit 14. The display data editing unit 14 displays the work method / procedure as the maintenance work permission condition on the output device 2 together with the work availability determination result.

FIG. 2 is a schematic flow chart of the arithmetic processing procedure of the work procedure propriety evaluation control unit 13 of the calculation processing apparatus 5 of FIG. In FIG. 2, a process 21 is a work content input process in which the work content data of the maintenance work designated by the input device 1 of FIG. 1 and the equipment data of the plant are input and stored in the storage unit 11.
If the maintenance work is a routine work such as a regular test, the work content is determined in advance, so the work content is stored in the storage device 3 as standard work content data.
It may be selected and input to the storage unit 11. Process 22 is a process of reading into the storage unit 11 the current maintenance work data and the scheduled maintenance work data from the storage device 3, the connection relationship between the plant system and equipment, and various data such as alternative machines. A process 23 is a display screen edit display (basic screen) process in which the maintenance work content data and the plant system diagram of the storage unit 11 are displayed on the output unit 2 from the display data editing unit 14 according to a fixed screen.
To display. In the following, the work procedure availability evaluation control unit 13 determines whether or not the influence ripple determination unit 15 or the work method change determination unit 18 is necessary.
Represents the structure of the arithmetic processing contents to be activated and executed.

In process 24, the maintenance work is compared with other maintenance work in progress and scheduled to be performed, and the duplication of the work time is checked. If there is a maintenance work in which this work time period overlaps, the influence of all the duplicated equipment operations accompanying the maintenance work is caused by the influence ripple determination unit 15 being activated in process 25 as a work condition of other maintenance work. And evaluate whether or not it affects the operating conditions of the plant. The detailed flowchart of the process 25 is shown in FIG. If neither of these is applicable, the subsequent processing is unnecessary and the evaluation determination result is displayed on the output device 2 as guidance information. If there is an influence ripple in process 25, search for a work method to avoid the influence spread in the subsequent processes.

In step 26, whether or not there is a device such as a valve or a switch that can prevent the influence ripple by activating the influence ripple prevention determination unit 16 in the route connecting the target equipment in the maintenance work and other maintenance work. Evaluate and judge by using the data of the connection relation of the system and equipment of the plant and the operating state. If there is a device that prevents the influence spread, in process 27, it is determined whether or not the influence spreads to the work conditions of other maintenance work and the operating conditions of the plant. That is, it is evaluated whether or not the influence of the operation of the equipment violates the work conditions of the target equipment and the operating conditions of the plant in all other rehabilitating repair work, and after the equipment is operated, the repair work concerned is performed. When the above is performed, it is evaluated and judged whether or not all other rehabilitating maintenance work and plant operation conditions are violated. If it is possible to prevent the influence of the operation of the target device of the maintenance work from being affected by the operation of the device, the guidance information is added together with the work permission / inhibition judgment result as the work permission condition in process 28. Is displayed on the output device 2. Further, if there is no device that prevents the influence ripple in process 26 or if the condition of other maintenance work or plant operation is violated in process 27, a substitute device for the target device of the maintenance work is searched for in the subsequent process.

In process 29, the presence / absence of an alternative machine is evaluated by activating the alternative machine operation determination unit 17, and is evaluated by using the data regarding the alternative machine of the plant system / device. If the target device of the maintenance work has an alternative machine, in process 30, it is determined whether or not there is an influence on all other overlapping maintenance work or plant operation conditions. That is, it was evaluated whether the influence of the switching operation to the alternative machine would violate the working conditions of the target equipment and the operating conditions of the plant in all other overlapping maintenance work, and the alternative machine was switched to. Later, when the maintenance work is carried out, it is evaluated and judged whether or not all other overlapping maintenance work and plant operation conditions are violated. As a result, if it is possible to prevent the influence of the operation of the target device of the maintenance work by the switching operation to the alternative machine, in Step 31 the work permission judgment result is set as the operation permission condition using the alternative machine switching operation procedure. It is also displayed on the output device 2 as guidance information. If there is no alternative machine in process 29, or if the condition of other maintenance work or plant operation is violated in process 30, it is checked whether the work method can be changed in the subsequent processes.

In process 32, the work method change determination unit 18 is activated to determine the work method change by using the non-standard work content data, and the operation is not a standard operation stored in the storage device 3, but is performed depending on the situation. Search for data on the equipment targeted for the maintenance work from the data on non-standard work that was summarized in.

If there is data related to the equipment targeted for the maintenance work, in process 33, it is determined whether or not the influence on the conditions of other maintenance work or plant operation is affected. That is, it is evaluated whether the influence of the operation of the non-standard work affects the working conditions of the target equipment in other maintenance work or the operating conditions of the plant, and when the maintenance work is performed after the operation is performed. Regarding the above, it is evaluated and judged whether or not all other overlapping maintenance work and plant operation conditions are violated. As a result, if the influence of the operation of the target equipment of the maintenance work can be prevented by the operation of the non-standard work, the operation permission / non-judgment result is set as the work permission condition with the operation procedure of the non-standard work in process 34. It is also displayed on the output device 2 as guidance information.

Further, if the work method / procedure that can prevent the influence of the maintenance work from being spread even in the process 32, the work execution time of the maintenance work is changed in the process 35. Then, in process 35, the process returns to process 24 and the duplication of the changed working time period is checked. In this way, by performing the processing 24 to the processing 35 for all other maintenance work in progress and scheduled to be carried out, the work permission condition when carrying out the maintenance work is defined as the work availability determination result. It is also displayed on the output device 2 as guidance information. The outline of the processing of the work procedure availability evaluation control unit 13 of the calculation processing apparatus 5 of FIG. 1 has been described above. Next, the processing content will be described in detail regarding a specific example of the maintenance work of the system / equipment of the plant 4.

FIG. 3 is a schematic system diagram (piping instrumentation diagram) of the turbine ground steam evaporator system of the boiling water nuclear power plant of the plant 4 of FIG. This system is for preventing air leakage from the turbine to the condenser and steam leakage from the main steam valves and the gland part of the steam valves of the turbine for driving the water supply pump. In FIG. 3, E-1 is an evaporator, S-1
Reference numeral -1 is a complex water make-up water system, S-2 is an internal boiler system, S-3 is a turbine grad seal system, S-4 is an extraction and main steam system, and S-5 is an evaporator drain tank. Also I-1,
I-2 is a pressure gauge, I-3 is a water level gauge, C-1 to C3 are controllers, EP-1 to EP-3 are electric air converters, and V-1 to V-16.
Is a valve, and y _{1 to} y ₆ are branch confluence points.

In this system, the steam supplied to the turbine gland seal system S-3 always uses the steam generated in the evaporator E-1, but when the reactor pressure is low, the steam of the in-house boiler system S-2 is used. To use. Further, in order to keep the steam pressure supplied to the turbine gland seal system S-3 at a constant pressure, the pressure gauge I-1
C-1 and electropneumatic converter using pressure signals of
Operate valve V-1 via EP-1 or pressure gauge I
The valve V-2 is operated by using the pressure signal of -2 to control the pressure. Further, in order to keep the water level of the evaporator E-1 constant, the valve V-3 is operated by using the water level signal of the water level gauge I-3 through the controller C-3 and the electro-pneumatic converter EP-3. The water level is being controlled.

In this turbine gland steam evaporator system, for example, the pressure control system from the pressure gauge I-1 to the valve V-1 that constantly controls the steam pressure to the turbine gland seal system S-3 fails, and the repair work is performed. It is assumed that the repair work of is currently in progress. As a working method in this case, the valves V-11 and V-12 are closed and the bypass valve V-13 is opened, and the make-up water flow rate and the heating steam amount of the evaporator E-1 are adjusted so that the fluctuation of the steam pressure does not become large. The maintenance work is carried out while adjusting and continuing the plant operation. In this working state, for example, the valve V-3 of the water level control system that controls the water level of the evaporator E-1 fails, the feed water flow rate decreases, and the evaporator E-1
Suppose that the water level in the area begins to gradually decrease. Then, the driver usually operates each device in order to perform maintenance and inspection work in order to know the failure point by observing the phenomenon of water level drop. One of them is to manually operate the water level control valve V-3. There is work to change the water supply flow rate. If the valves other than the valve V-3 are normal, this maintenance and inspection work is not a problem, but if the pressure control system including the valve V-1 is not operating normally, the evaporator E-1
When the flow rate of water supply to the water increases rapidly, the water level rises and the steam pressure drops, so the pressure of the turbine gland seal system S-3 drops, and the equipment operation in the maintenance work of maintenance work of the water level control system is the steam pressure. The result is a constant impact on the ongoing pressure control system maintenance and plant operating conditions.

Thus, while the repair work for the failure of the pressure control system including the valve V-1 of the turbine gland steam evaporator system of the plant of FIG. 3 is in progress as another maintenance work, a newly generated evaporator E is generated.
-1 Other maintenance work such as operation of equipment such as the valve V-3 of the water level control system in the maintenance inspection work as the maintenance work for investigating the cause of the water level abnormality is constant steam pressure to the turbine gland seal system S-3 The processing of each part of the flow chart in FIG. 2 will be described in detail by taking as a specific example the case where the working conditions and the operating conditions of the plant are violated.

First, process 21 is the evaporator water level control valve V of the turbine ground steam evaporator TGS of the maintenance work specified from the input device 1.
-3. The work content data of the maintenance and inspection work and the equipment data of the plant are input and stored in the storage unit 11. Process 22 is the maintenance work content data in progress, scheduled maintenance work content data, standard work content data, plant system / device connection information data, influence spread data, alternative machine data, display screen data, non-standard from the storage device 3. The work data and the like are read into the storage unit 11. The specific contents of these various data will also be explained in relevant parts. After reading these data, a basic screen such as the maintenance work content data and plant system diagram is displayed on the output device 2 in process 23.

FIG. 4 shows a display screen example (basic screen) of the output device 2 of FIG.
FIG. In FIG. 4, 40 is an output device screen,
41 is a maintenance work content display unit, 42 is a system diagram display unit, 43 is a work availability determination result display unit, and 44 is a work permission condition display unit.
FIG. 4 shows an example in which four kinds of information are displayed on each of the above four display units in the output device screen 40 in the processing 23 described above, and the frame and heading of each display unit in the figure are fixed screens. Yes Display screen data of the fixed screen, which is prepared in advance and stored in the storage device 3, is displayed as it is. The maintenance work content display portion 41 displays the work content data of the maintenance and inspection work of the TGS evaporator water level control valve V-3 of the maintenance work input in the process 21. This work content data of the target system
TGS evaporator water level control system, equipment valve V-3, work time, change of setting value of controller C-3 of equipment operation procedure, manual change of valve opening of valve V-3, and other maintenance work concerned. The pressure fluctuation prohibition condition at the location (branch confluence) y ₃ is displayed as the work condition (prohibition condition) that does not violate the maintenance work or plant operation conditions. Further, the system diagram display unit 42 displays a system diagram of the TGS evaporator water level control system which is the target of the maintenance work. This system diagram is displayed by designating it from the input device 1 by selecting necessary ones from the display screen data of the system diagram prepared in advance and stored in the storage device 3.

FIG. 5 is an explanatory diagram of a configuration example of display screen data (main system / each system) of the output device 2 of FIG. 1 (FIG. 4). Fifth
The figure shows the main system including the entire plant and its respective systems in a hierarchical manner and shows each screen number and the location of detailed structure data in a frame format, and is stored in the storage device 3 as hierarchical display screen data of the system diagram. It For example, the screen number for all the turbine ground steam evaporator systems of the concrete example of FIG. 3 is FIG-33 of FIG. 5, and its detailed structure data is stored in the frame named TGS-1. Indicates. Furthermore, in this TGS-1 frame, the turbine gramd steam evaporator system is divided into several systems,
The screen number of each system and the frame name which stores detailed structure data are shown. Thus, the system diagram display section 42 of FIG.
A system diagram of screen number FIG-33.3 of the evaporator water level control system of TGS-1 shown in Fig. 5 designated as the maintenance work is displayed on the screen. At this point, the work permission / inhibition determination result display section 43 and the work permission condition display section 44 in FIG. 4 are blank and are additionally displayed in the subsequent processes 28, 31, 34, and 35. With the above processing, the display screen edit display (basic screen) display processing of processing 23 is completed, and then, in processing 24, the overlap of the work time zone between the maintenance work and other maintenance work is checked, and the work time zone is not duplicated. For example, in process 25, it is determined whether or not the maintenance work affects the work conditions of other ongoing maintenance work and scheduled maintenance work and the operating conditions of the plant.

FIG. 6 is a flow chart of an example of the procedure for determining the influence / impact influence of the processing 25 of FIG. In FIG. 6, first, the processing 61
The start point X and the end point Y of the influence spread evaluation are set with. The start point X is set by selecting a device to be operated in the maintenance work, and the end point is set by selecting a device, a branch point (location), or the like under the work conditions of another maintenance work. These are obtained from the content data of maintenance work.

FIG. 7 is an explanatory diagram of a configuration example of the maintenance work content data of FIG. 1 (FIG. 3). Figure 7 shows TGS of other ongoing maintenance work
The steam pressure control valve repair work is expressed in a frame format and is stored in the storage device 3 as the content data of the ongoing maintenance work. The system equipment (TGS steam pressure control system / valve V-1) work time / operation equipment / impact (valve V-13 open, valve V-
(11 closed, valve V-12 closed, flow rate fluctuation), as well as work conditions (prohibited conditions), a branch point (location) necessary for this ongoing maintenance work not to violate other maintenance work or plant operation conditions. The conditions for prohibiting the pressure fluctuation of y ₃ are set. Also, the TG for the maintenance work set and input from the input device 1
S The maintenance work content data of the maintenance / inspection work of the evaporator water level control valve V-3 includes a manual operation of changing the valve opening of the evaporator water level control valve V-3 as an equipment operation procedure. Accordance connexion set the water level control valve V-3 as the starting point X of these advanced mediation Osamu work and the TamotsuOsamu work data, sets a branch point y ₃ as the end point Y. Then, in step 62 of FIG. 6, a list of connection relationships between the systems / devices is created. This can be created using the data regarding the configuration and connection relationship of the system / equipment in the plant.

FIG. 8 is an explanatory diagram of an example of configuration data of the system of the plant of FIG. 1 (FIG. 3). FIG. 8 shows the configuration of the turbine ground steam evaporator system of the plant in a frame format and is stored in the storage device 3. The system configuration data includes externally input condensate makeup water system S-1 and in-house boiling system S-.
2, the external output turbine gland seal system S-3, equipment type, connection list, etc. are shown, and a list of connection relationships from the required start point X to the required end point Y is created from the connection list included in this configuration data. . Then, in step 63 of FIG. 6, the list of connection relationships is sequentially searched, and the connection relationship of whether or not the connection is established from the start point X to the end point Y set previously is evaluated in consideration of the state of equipment such as valves and switches. To do. If there is a connection relationship (connection state), in process 64, the influence spread of the device operation targeted in the maintenance work is evaluated based on the influence data and the influence spread data.

This impact spread data shows if-then showing the relationship between cause and effect.
Express it as a format rule. An example is shown below.

if ((Flow rate, $ X, $ Z) (Connection, $ X, $ Y) (Fluid, $ Y, Steam)) then ((Flow rate, $ Y, $ Z)) (Pressure, $ Y, $ Z) ) This format means "if the flow rate at location $ X is affected by $ Z and location $ X is connected to location $ Y,
And if the fluid (substance) at location $ Y is vapor, it affects the flow rate at location $ Y, $ Z affects it, and it affects the pressure at location $ Y $.
Z spreads. " Any character string can be entered in the above symbols $ X, $ Y, and $ Z. Of the propositions of the conditional part of this form, the connection relation has already been obtained in process 62. In addition, the corresponding operation for maintenance work such as repair work at the time of failure is stipulated for each system / equipment, and the corresponding operation for repair work of TGS steam pressure control valve V-1 of ongoing maintenance work and impact data are the first. As illustrated in Fig. 7, it is required that the flow rate fluctuates from these maintenance work content data. And the type of fluid is the output amount (1) of the external output of the system configuration data in FIG.
Is required to be steam. Therefore, the conclusion of this rule is that the flow rate and pressure at location y ₃ should vary.

Then, in the process 65 of FIG. 6, the evaluation result of the influence ripple of the device operation targeted in the maintenance work of the above processing 64 is compared with the work condition (prohibition condition) of the other maintenance work at the end point Y. The work condition of the repair work of the TGS steam pressure control valve V-1 of the other ongoing maintenance work is that the pressure fluctuation is prohibited at the place y ₃ of the work condition (prohibited condition) of the maintenance work content data shown in FIG. This matches the evaluation result of the above process 64. Therefore, in the process 66, the influence influence determination result is determined to be influence influence (other maintenance work conditions and plant operating conditions are violated). Further, if the influence of the equipment operation of the maintenance work does not match the work condition (prohibition condition) of the other maintenance work of the end point Y in the process 65, the influence is exerted on all the equipment operations of the maintenance work in the process 67. It is determined whether or not the ripple has been evaluated, and if there is another device operation, the processes 61 to 67 are repeated again. Processing again
If all equipment operations have been evaluated in 67, it is determined in process 68 whether or not the influence has been evaluated on the combination of the maintenance work and all other overlapping ongoing maintenance work and planned maintenance work. If there is another maintenance work, the process 61 to the process 68 are repeated again. Then, if all other maintenance work is evaluated, the influence influence determination result is determined to be no influence influence (other maintenance work conditions and plant operating conditions are not violated) in process 69. The work availability determination result display section 43 of the output device screen 40 of the output device 2 displays the evaluation determination result of the influence of the operation of the maintenance work device thus obtained on other maintenance work conditions and plant operating conditions. It is additionally displayed as guidance information on.

FIG. 10 is an explanatory diagram of a guidance information additional display example of the workability determination result display section 43 of the display screen 40 of the output device 2 of FIG. 1 (FIG. 4). Fig. 10 shows the maintenance and inspection work of the TGS evaporator water level control valve V-3 (valve V-
3) It shows whether or not the operation (large opening) can be operated and the reason (pressure fluctuation at location y ₃ ). In this way, if the result of the influence influence judgment is influence influence, it is possible to deepen the driver's understanding by also displaying which other maintenance work conditions (prohibited conditions) and plant operation conditions match. it can. The influence spread presence / absence determination processing procedure of the processes 27, 30, 33 of FIG. 2 is the same as the influence spread presence / absence determination processing procedure of the process 25 of FIG. 6 described above.

Next, in the influence ripple prevention determination of the process 26 of FIG. 2, first, the influence of valves and switches is affected by the devices in the list of connection relationships from the starting point X to the end point Y created in the process 62 of the process 25 of FIG. Evaluate and determine whether there is any device that can be blocked. In the case of the maintenance work, this is done by checking whether the equipment in the connection list of the configuration data of the turbine gland steam evaporator system in Fig. 8 corresponds to the equipment that can prevent the influence spread, and if the equipment If there is, it is determined whether or not the state, for example, the open / closed state of the valve or switch can be reversed. If the result of the determination indicates that the reversing operation is possible, the presence / absence of the influence of the reversing operation of the corresponding device is evaluated in processing 27 by the same processing procedure as the influence ripple determination in processing 25 described above. That is, the reversing operation of the corresponding equipment is set as the equipment operation of the maintenance work in process 27, and the reversing operation of the corresponding equipment has an influence on the work conditions (prohibition conditions) and plant operating conditions of all other overlapping maintenance work. Evaluate whether to do or not. If there is no influence of the reversing operation of the relevant equipment in this evaluation result, then when the original maintenance work is performed after the reversing operation of the relevant equipment, the work conditions of all other redundant maintenance work and the operating conditions of the plant Evaluate whether or not it will affect the. If the influence ripple determination result is no influence ripple, in process 28, the work permission condition of the display screen 40 of the output device 2 in FIG. The guidance information is additionally displayed on the display unit 44. In the case of maintenance / inspection work of the evaporator water level control valve V-3 of the maintenance work, the bypass valve V of the TGS steam pressure control system is a corresponding device between the start point X and the end point Y ₃ above. Since there is -13, and this bypass valve V-13 is in the open state, it is possible to perform the reversing operation to the closed state, but if the reversing operation is performed to the closed state, steam will go to the end point Y (branch point) y ₃ . After all, the work conditions (prohibition conditions) of the end point Y do not match. Therefore, the influence influence determination result of the process 27 indicates that there is influence influence, and the presence / absence of an alternative device is determined in the next process 29.

FIG. 9 is an explanatory diagram of an example of related data of an alternative machine of the plant of FIG. 1 (FIG. 3). Fig. 9 shows an alternative machine for the TGS pressure control system of the plant (device that can prevent the influence of the maintenance work)
System / operating conditions (bypass valve V-13 / evaporator pressure rating, valve V-1 closed, valve V-13 open) and system / operating conditions of alternative TGS evaporator system (in-house boiler system S- (2. Internal boiler pressure rating, valve V-1 closed, valve V-13 closed, valve V-2 open, etc.) are expressed in a frame format. In the process 29, the presence or absence of the alternative machine is determined by searching the prepared related data of the alternative machine which is predetermined from the plant operation as shown in FIG. If there is an alternative machine as a result of the determination, it is necessary to operate a device that satisfies the operation condition of the alternative machine as illustrated in FIG. Therefore, in process 30, the presence / absence of influence of the operation of the switching device of the corresponding alternative machine is evaluated and determined by the same processing procedure as the influence influence determination in the process 25 described above. That is, the switching device operation of the alternative machine is set as the equipment operation of the maintenance work in process 30, and the switching machine operation of the alternative machine is set as the operation condition (prohibited condition) and the plant operation condition of all other overlapping maintenance work. Evaluate whether or not it has an influence. If the result of this evaluation does not affect the operation of the switching device of the alternative machine, the operation of the alternative machine is possible. Whether or not all maintenance work and plant operating conditions are affected will be evaluated and judged. If the influence influence determination result is no influence influence, the guidance information is displayed in the work permission condition display section 44 of the display screen 40 of the output device 2 in FIG. Is displayed. In the case of the maintenance and inspection work of the evaporator water level control valve V-3 of the maintenance work, as shown in FIG. 9, the alternative to the TGS evaporator system is the internal boiler system S-2.
As its operating conditions, the steam pressure control system valves V-1 and V-13 are closed at the internal boiler pressure rating, and the steam pressure control system valves V-2 and V-14 of the internal boiler system S-2 are closed. V-1
Since 5 etc. are opened, steam goes to the location (branch point) y _{3 of the} end point Y, which matches the working condition (prohibition condition) of the end point Y. Therefore, since the influence influence determination result of the process 30 is no influence influence, in the next process 31, the switching to the corresponding alternative machine and its operating conditions are added to the work permission condition display section 44 of FIG. 4 as work permission conditions. indicate.

FIG. 11 is an explanatory diagram of a guidance information additional display example of the work permission condition display section 44 of the display screen 40 of the output device 2 of FIG. 1 (FIG. 4). FIG. 11 shows permission conditions (switching of the substitute to the in-house boiler system S-2) and its operating conditions as work permission conditions for the maintenance and inspection work of the TGS evaporator water level control valve V-3 of the above maintenance work. Internal boiler pressure rating, valve V-1 closed, valve V
-13 Closed, valve V-2 open, etc.) guidance information is additionally displayed. If it is impossible to switch to the alternative machine in the above processing 29, 30, a work method change determination is made in processing 32.

In the next process 32, the non-standard work content data is searched to determine the change of the work method.The typical non-standard work method is maintenance and inspection work of various trip signal generation circuits in the electric system. is there. In this work method, a printed circuit board is treated as a target device for the maintenance work, and it is checked whether or not a trip signal is normally generated from the corresponding printed circuit board. At that time, if the inspection work is carried out with the system built in, the trip will actually occur, so the relevant signal line should be removed to perform the inspection, but simply removing the signal line will not result in a normal state, so the jumper line will be temporarily used. It will be installed at the location for maintenance and inspection work. Therefore, the work content data is collectively stored as non-standard work content data of the plant in this way, and the work method change determination is performed. If the work method can be changed based on the evaluation result, the work procedure of the corresponding work method is processed in process 33 in process 33.
The same treatment procedure is used to evaluate whether or not there is an impact on the work conditions of all other overlapping maintenance work and the operating conditions of the plant, and if there is no impact, the relevant maintenance work is performed after the relevant work operation procedure has been performed. When the above is performed, the presence or absence of the influence of the work conditions of all other overlapping maintenance works and the operating conditions of the plant is evaluated and judged. If the result of the influence influence determination is no influence, in process 34, the guidance information is displayed in the work permission condition display portion 44 of the display screen 40 of FIG. 4 with the change to the corresponding work method and the work operation procedure as the work permission condition. Is displayed.

Although the above embodiment does not particularly describe high-speed processing, it is possible to speed up processing by applying various high-speed processing algorithms such as the Rete algorithm when handling a large amount of data targeted for an actual plant. Is.

As described above, according to the present embodiment, when the maintenance work specified by the plant is carried out, a device in the route in which the influence of the operation of the target device of the maintenance work spreads is obtained, or a substitute device of the target device of the maintenance work Or a change in the work method for maintenance work, and a guidance for a work method / equipment operation procedure in which the specified maintenance work does not violate other work or plant operating conditions by the required equipment operation. Information can be displayed.

〔The invention's effect〕

According to the plant maintenance work guidance method and apparatus of the present invention as described above, it is determined whether maintenance work such as plant maintenance and inspection work or repair work affects other work or plant operating conditions. Not only that, when it affects the influence, it displays the work method / procedure to prevent or avoid it as guidance information, which can prevent interference between maintenance work and reduce the burden on the driver. There is.

[Brief description of drawings]

1 is a system configuration diagram showing an embodiment of a plant maintenance work guidance method and apparatus according to the present invention, FIG. 2 is a schematic flow chart of the arithmetic processing procedure of FIG. 1, and FIG. 3 is a diagram of the plant of FIG. FIG. 4 is an explanatory diagram of a display screen example (basic screen) of FIG. 1, FIG. 5 is an explanatory diagram of a display screen data configuration example of FIG. 4, and FIG. FIG. 7 is a flow chart of an example of influence influence determination processing procedure of FIG. 2, FIG. 7 is an explanatory view of a maintenance work content data configuration example of FIG. 1, and FIG. 8 is a plant system configuration data example of FIG. Fig. 9 and Fig. 9 are explanatory views of the plant alternative machine data example of Fig. 1, Fig. 10 is an explanatory diagram of the work permission / inhibition determination result additional display example of Fig. 4, and Fig. 11 is the work permission condition addition of Fig. 4. It is explanatory drawing of a display example. DESCRIPTION OF SYMBOLS 1 ... Input device, 2 ... Output device, 3 ... Storage device, 4 ... Plant, 5 ... Calculation processing device, 11 ... Storage unit, 12 ... Plant state input unit, 13 ... Work procedure availability evaluation control unit, 14 ... Display data Editing unit, 15 ... Influence influence determination unit, 16 ... Influence influence prevention determination unit, 17 ... Alternate machine operation determination unit, 18 ... Work method change determination unit.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuo Nishizawa 1168 Moriyama-cho, Hitachi City, Ibaraki Prefecture Hiritsu Manufacturing Co., Ltd. Energy Research Institute (72) Inventor Wataru Kitaura 1168 Moriyama-cho, Hitachi City Hitachi, Ltd. Hitate Manufacturing Co., Ltd. Energy Research Institute (72) Inventor Takaho Kasahara 1168 Moriyama-cho, Hitachi City, Ibaraki Prefecture

Claims (1)

[Claims] 1. Whether or not maintenance work designated by an input device of a plant violates other work and plant operating conditions is determined based on plant maintenance management data stored in a storage device and plant state data fetched from a plant state input means. However, if the conditions are violated, the equipment subject to the maintenance work is sought on the route where the influence of the operation influences, and it is judged whether the influence spread can be prevented by the operation of the equipment, or the equipment subject to the maintenance work. By deciding whether or not the influence spread can be prevented by switching to that alternative machine and switching to that alternative machine, the work method and equipment operation procedure that the specified maintenance work does not violate other work and plant operating conditions A plant maintenance work guidance device equipped with calculation processing means for obtaining and displaying on an output device.