JPH0460814A - Operation support device - Google Patents

Abstract

PURPOSE:To handle an interrupt operation for re-adjustment at an arbitrary time in the case of the deviation of a pressure or a flow rate from a determined range by providing a knowledge base related to procedures requiring an interrupt and an inference mechanism. CONSTITUTION:An operation support device main body 30 uses the knowledge base and an inference algorithm to infer procedures required for execution and stores them in a working memory 3. Stored procedures are successively outputted as an operation procedure guide to an operator through an output device 40 based on the procedure-hierarchy characteristic. An interrupt condition knowledge base 1 and a working memory 3 are connected to an interrupt condi tion decision device 2, and interrupt condition decision is checked with respect to all interrupt condition knowledges stored in the interrupt condition knowledge base 1; and when data satisfying the interrupt condition is found, a pertinent procedure name is inserted to the start of the working memory 3 after state information ''waiting for 'start' is added. Thus, the interrupt operation for re-adjustment can be handled at an arbitrary time if the pressure or the flow rate is deviated from the determined range.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device applied to support the operation of a plant.

More specifically, the present invention relates to a driving support device that can be applied not only to an operation guide for an operator, but also to an automation device that provides the driving operation itself to a plant via an actuator.

[Prior Art] Generally, in large-scale plants such as power plants and chemical plants, manuals are prepared for operating the plants during normal and abnormal times, and standard operations are possible. There is. However, what is written in the operating manual is
This is just a standard operating procedure for typical cases. Therefore, operators deal with each case while considering the meaning and effects of the operation. That is, appropriate driving operations in response to moment-to-moment changes in the situation, such as changing the order of execution of a series of driving operation items, adding or omitting them, etc., depend on human ability. Therefore, there was a risk that human error would occur.

Therefore, a system has been developed that computerizes such driving instructions and outputs a driving guide appropriate to the situation. In addition to a standard series of driving operations, driving operation items are hierarchically organized according to their purpose and function, and by enabling conditional branching and conditional cancellation, it is possible to output a certain level of flexible driving operation guide. In some cases, improvements have been made.

An overview of the prior art will be explained based on patents related to improved examples (Japanese Patent Application No. 110034/1982 and Japanese Patent Application No. 163913/1983). In the following explanation, "achievement of operational purpose" such as "plant startup", "achievement of function" such as "establishment of filling/extraction flow", and "execution of operational operation" such as "filling/extraction source valve adjustment" will be used. are collectively referred to as “procedure execution”.

FIG. 2 is an explanatory diagram of a flexible driving operation procedure.

In other words, the start-up operation procedure for a PWR plant is to place step A nibrant start-up at the top level, and then follow step A1, which is one step lower.
Establishment of filling/extraction flow and starting A2 secondary coolant pump/
This is done by executing... Procedure A1: Establishment of filling/extraction flow is as follows: specific operation steps a: adjustment of the filling/extraction source valve, b: opening of the filling high pressure injection pump source valve, C: starting of the filling high pressure injection pump, d: adjustment of the filling flow rate, and e. , achieved by making extraction line pressure adjustments. A2. The second coolant pump is achieved by f: check before startup, g, sequentially start the second coolant pump, and adjust the extraction line pressure. However, at this time, the most standard procedure is to perform in the order of abcdefgh, but depending on the case, the order may be changed to basefgh (the underlined part is in a different order), or e to adjust the extraction line pressure. As a result, if the state is maintained, h
Extraction line pressure adjustment may be omitted. In Figure 2, items such as Al-, A2, or f-1g that must be executed in the order of execution are indicated by the symbol, and a=
Cases where either one can be executed first, such as b or d=e, are indicated by one symbol.

The following Table 1-1 is an example of a data format when the driving operation procedure illustrated in FIG. 2 is expressed as knowledge data to be handled by a computer.

Table 1-1 ■Procedure name is the name of the procedure enclosed in a rectangle in FIG.

■Start conditions are data for determining the situation in which execution of the procedure should start (size of process amount, 0N switch)
10FF etc. same as below. ).

■Cancellation conditions are data for determining the situation in which execution of the procedure should be canceled.

(2) Completion conditions are data for determining that execution of the procedure has been completed.

■The higher-level procedure is the person who is one step higher in the procedure.

■The lower step is the person who is one step lower in the step. However, the lower steps can be selected according to the situation using branching conditions.

However, *0 indicates that the data can be omitted, and 0 indicates that the data can be described on any side.

The algorithm used to perform inference using the data format shown in Table 1-1 is as follows.

(a) Set the top level procedure.

The settings may be input by an operator, or may be automatically set by another operating state grasping device or abnormality diagnosis device, and any method may be used.

(b) Extract the sub-procedures.

Find a branching condition that holds true in that situation, extract the corresponding lower-level procedure, and write it into working memory. At this point, only candidates for sub-procedures for achieving a certain procedure have been extracted, and the procedure is marked with status information of "waiting to be executed".

(C) Determine starting conditions.

If the start condition is met, the status information of the procedure in the working memory is changed to "waiting for completion" and guidance for the procedure is output to the operator to execute the procedure.

(cl) Determine cancellation conditions.

If the cancellation condition is met, the status information of that procedure in the working memory and all subordinate procedures derived from it up and down the hierarchy is changed to "canceled j."

(e) Determine completion conditions.

If the completion condition is met, the status information for that procedure in the working memory is changed to "completed".

Table 1-2 below shows an example of the contents of the working memory when inference is made using the above knowledge base and inference algorithm.

Table 1 This example shows the state when the plant shown in FIG. 2 has been started and step d has been completed. The reason why A and A1 are waiting for completion is because lower procedures A2 and e have not been completed, respectively. Also, flgh is not extracted because
This is because the start condition (-AI completion) of these higher-level procedures A2 is not satisfied.

Note that an example of a conventional positional configuration will be explained in conjunction with a detailed explanation of the present invention.

[Problem to be solved by the invention] Although it is possible to provide driving support through computerized operating instructions and flexibility through conditional branching and conditional cancellation, the conventional technology described above does not allow for all branching and cancellation in advance. Is it necessary to describe candidates in the knowledge base? For example, when the pressure or flow rate deviates from a predetermined range, it is only possible to handle interruptive operation operations such as readjusting at any time.

This placed a heavy mental burden on the operators responsible for monitoring and making decisions. Additionally, inexperienced operators may perform redundant operations or standby, or in extreme cases may cause unnecessary plant shutdowns, resulting in a reduction in plant availability.

Therefore, the purpose of the present invention is to solve the drawback of the prior art, namely, the inability to handle interruptive operation operations such as readjusting at any time when the pressure or flow rate deviates from a predetermined range. In view of the lack of knowledge representation and inference mechanism, we created a knowledge base and inference mechanism regarding the necessary procedures for interrupts, and inserted the necessary procedures into the working memory as needed. The object of the present invention is to provide a driving support device equipped with means capable of solving the problems of the above.

[Means for Solving the Problems] In order to solve the above problems and achieve the objectives, the present invention takes the following measures.

In a plant operation support system that determines operation contents and informs operators of the contents based on a knowledge base that hierarchically expresses operational knowledge related to plant operation and process quantities input from the plant, the conditions for generating operation procedure interrupts are determined. and a means for storing knowledge related to the corresponding operating procedure; a means for determining the occurrence of an interrupt based on the above operating procedure interrupt occurrence condition and the process amount; and when it is determined that an interrupt has occurred, performing the corresponding operation as described above. A means of informing operators of the procedures as a top priority was provided.

More specifically, the driving support device of the present invention has the means described below.

(1) A first means for storing a knowledge base regarding the conditions under which a procedure interrupt occurs and the procedure to be interrupted. (2) A second means for determining whether a procedure interrupt is necessary. (3) Interruption Third Means for Temporarily Storing Procedures [Effects] As a result of taking the above-mentioned means, the following effects occur.

The first means stores a knowledge base regarding the conditions under which a procedure is interrupted and the procedure to be interrupted. The process amount of the plant and the progress state of the procedure temporarily stored in the third means are input to the second means. The second means thus uses the interrupt condition knowledge base stored in the first means to determine situations and procedures requiring an interrupt.

This determination result is added to a set of procedure candidates temporarily stored in the third means.

[Example] Hereinafter, an example of the driving support device according to the present invention will be described based on the drawings.

(1) Apparatus configuration FIG. 1 is a diagram showing an apparatus configuration according to an embodiment of the present invention.

This figure is shown in a form in which the content of the present invention is added to the conventional example. The range surrounded by the broken line is the key point of the present invention.

Process quantities are input from the plant 10 via the input device 20 . This input value is input to the driving support device main body 30. This driving support device main body 30 uses the knowledge base described in the description of the prior art and the inference algorithm to infer the procedure necessary for implementation and stores it in the working memory 3. The stored procedures are sequentially output to the operator as an operating procedure guide via the output device 40 based on the procedure hierarchy.

In this embodiment, the input value from the input device 20 is also separately input to the interrupt condition determination device 2. The interrupt condition determination device 2
The interrupt condition knowledge base 1 and the working memory 3 are connected to the interrupt condition knowledge base 1 and the working memory 3.

(2) Interrupt condition knowledge base Knowledge of interrupt conditions It is shown in Table 2-1.

Table 2-1 An example of evening format is as follows: ■Interrupt condition name is the name of knowledge regarding interrupts.

(2) Interrupt condition determination data is data for determining a situation in which an interrupt should be performed, and the procedure with the following procedure name is interrupted as soon as the condition is satisfied.

Next, an example of interrupt condition knowledge is shown in Table 2-2 below.

Table 2-2 This example is knowledge about the conditions that require readjustment of the extraction line pressure. Under the precondition that the extraction flow rate is greater than f, if the extraction line pressure is not between p and q, Indicates that extraction line pressure adjustment is required.

(3) Interrupt condition determination algorithm The inference algorithm performed within the interrupt condition determination device is as follows.

(a) Judgment of interrupt conditions The interrupt condition judgment data is checked for all the interrupt condition knowledge stored in the interrupt condition knowledge base 1, and if any is true, the corresponding The name of the procedure to be performed is inserted at the beginning of the working memory 3 with status information of "waiting to start" added. To explain using the example of Table 1-2 above, if the interrupt condition is satisfied when step d is completed, this means that the corresponding step is inserted before A2.

(b) Handling of interrupt procedures A procedure in which an interrupt is performed is inserted at the beginning of the working memory and is therefore processed with the highest priority, but other processing is exactly the same as a normal procedure.

Note that the present invention is not limited to the embodiments described above, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[Effects of the Invention] As explained above, according to the present invention, the following effects can be expected.

It is now possible to handle interruptive operation operations such as re-adjusting at any time when the pressure or flow rate deviates from a predetermined range, and the procedure that causes the interrupt is the same as in the conventional case. Hierarchical deployment and flexible procedure extraction are now possible.

As a result, operational support can be provided in a timely manner to the operators responsible for monitoring and making decisions, which has the effect of reducing the mental burden on the operators and improving the plant operating rate.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of an apparatus according to an embodiment of the present invention. FIG. 2 is a diagram shown to explain the prior art, and is a diagram to explain a flexible driving operation procedure. 1. Interrupt condition knowledge base 2. Interrupt condition setting device
3... Working memory 1o... Plant 20...
Input device 3o...Conventional driving support device 40...Output device

Claims (1)

[Claims] A plant operation support device that determines operation contents and informs operators of the contents based on a knowledge base that hierarchically expresses operation knowledge related to plant operation and process quantities input from the plant, means for storing knowledge related to operating procedure interrupt occurrence conditions and corresponding operating procedures; means for determining the occurrence of an interrupt based on the operating procedure interrupt occurrence conditions and process amount; A driving support device comprising: a means for informing an operator of the corresponding operation procedure with the highest priority when the time comes;