JPH0789068B2 - Plant monitoring equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a plant monitoring apparatus.

(Prior Art) For example, in a plant monitoring device that monitors an industrial plant such as a power plant, in order to input monitoring information, an input point for inputting a process signal is provided in each part of the plant.

In order for the plant monitoring device to perform appropriate monitoring operation, this input point must be operating normally.Therefore, the status of these input points must be determined at certain times such as when the plant starts. ing.

FIG. 5 shows a conventional example of a plant monitoring device that determines the state of an input point in this way.

In the figure, the process input device 1 is for inputting a process signal output from an input point (not shown), and the input signal is applied to the input signal processing means 3 of the process computer 2. .

The input signal processing means 3 determines whether or not the value of the level signal of the process signal input from the process input device 1 deviates from the specified range set for each level signal, and the determination result and The converted value of the input value into the engineering unit system is stored in the input data storage means 5 of the storage device 4. Regarding the contact signal among the process signals,
The on / off state is stored in the input data storage means 5.

When the defective input list request command is input from the keyboard 7, the keyboard input processing means 6 notifies the defective input point list display means 8 to that effect.

As a result, the defective input point list display means 8 forms, from the stored data of the input data storage means 5, the input points for which the input values are determined to be defective, and the list display information of the input values, and the list is displayed. The display information is output to the display processing means 9 and the print processing means 10.

As a result, the display processing means 9 outputs to the display device 11 the list display of the input points and the input values for which the input value is determined to be defective, and the print processing means 10 causes the print device 12 to display the same list. Record and output the display.

In this way, in this conventional apparatus, when the operator operates the defective input list request command from the keyboard 7,
At that time, the input point determined to be defective was displayed.

However, in such a conventional device, in order to obtain the defective input list display, the operator needs to input the defective input list request command from the keyboard 7, which is a burden on the operator.

There are also input points where the signal range does not reach the specified range unless the plant enters a certain state, that is, there are input points where the state of the output signal depends on the plant state. However, in the plant state at that time, it is necessary for the operator to determine an input point that is not the target of the defective input determination, which causes an inconvenience that the burden on the operator is very large.

Therefore, in order to reduce the burden on the operator, a plant monitoring device having a function of automatically monitoring the state of the input point is also in practical use.

For example, an input parameter Y that can set a linear relationship with the input value X of the generator output is determined, and the parameter Y _i is calculated based on the following equation.

Y ₁ = A ₁ X + B ₁ (25% ≦ X <50%) Y ₂ = A ₂ X + B ₂ (50% ≦ X <75%) Y ₃ = A ₂ X + B ₂ (75% ≦ X <100%) The deviation between the calculated parameter Y _i and the parameter Y is calculated, and when the deviation exceeds a certain value, it is determined that the input parameter Y is the above value or more.

(Problems to be Solved by the Invention) However, such a conventional method needs to be able to set a linear relationship between two input signals, and cannot be applied to a case where there is no input signal having such a relationship.

Further, in many cases, the linear relationship depends on the plant state, and thus such a method cannot always be used.

[Structure of the Invention] (Means for Solving the Problem) In the present invention, the defect determination timing and the appropriate state of the output signal of each input point at that timing are registered in advance so that the defect determination timing is reached. At that timing, an input point that is not in an appropriate state is determined and displayed and output.

(Operation) As a result, even if the operator does not perform a command operation, the defect of the input point is automatically determined, and the determination result is displayed in a list, so that the burden on the operator is significantly reduced.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a plant monitoring apparatus according to an embodiment of the present invention. In the figure, the same parts as those in FIG. 5 and the corresponding parts are designated by the same reference numerals.

In the figure, the input signal processing means 3 indicates that among the process signals input from the process input device 1, the level signal is
It is determined whether or not the value deviates from the specified range set for each level signal, and the determination result and the change value of the input value to the engineering unit system are stored in the input data storage means 5 of the storage device 4. At the same time, the ON / OFF state of the contact signal of the process signals is stored in the input data storage means 5. When a contact signal whose on / off state is changing is detected, the condition determination processing means 15 is notified of that fact.

The condition determination processing means 15 is defective if there is a stored content of the input data storage means 5 that satisfies the process execution start condition of the defective input determination information (described later) stored in the defective input determination information storage means 16. The defective input determination means 17 is instructed to start the input determination processing, and the condition number attached to the condition is stored in the established condition number storage means 18. The processing of the condition determining means 15 is performed when the input signal processing means 3 notifies the detection of the change in the on / off state and at a constant cycle.

When the condition determination processing unit 15 notifies that the condition is satisfied, the defective input determination processing unit 17 stores the defective input determination information of the condition number stored in the satisfied condition number storage unit 18 at that time. The state of the input data at each input point stored in the input data storage means 5 is determined, and the determination result and the input value list display information are stored in the output data storage means 19. With that,
The display processing means 9 and the print processing means 10 are instructed to start processing.

As a result, the display processing means 9 takes out the defective input list display information from the output data storage means 19, collects it in a predetermined format, and outputs it to the display device 11 for display.

Further, the print processing means 10 takes out the defective input list display information from the output data storage means 19 and collects it in a predetermined format,
Record and output from the printer 12.

FIG. 2 shows an example of defective input determination information stored in the defective input determination information storage means 16.

This defective input judgment information is the condition number for identifying each condition, the process execution start condition information that sets the condition to start the process execution, and the input signal in that state is always judged to be out of range. Input signal range deviation regulation input point information in which the input point is set, analog input value regulation range information indicating the regulation range of the input point of the analog input value (level input value) in that state, and contact in that state It is composed of contact input prescribed state information indicating the prescribed value of the on / off state of the input point of the input.

Further, with respect to the input point set in the input signal range deviation regulation input point information, in that state, since the input value cannot be properly obtained, the content of the analog input value regulation range information is blank.

For example, in the defect input determination information of condition number 1, the process execution start condition is the furnace temperature of 180 degrees or more, and the input signal range deviation regulation input point at that time is C001, C002, F010, E011.
(PID number) 4 points.

In addition, the analog input value specified range is set for each analog input point except the input points C001, C002, F010, E011, and for example, "10 to 20" is set as the specified range of the input point A000. The range of F050 is "0-2
"0" is set.

The prescribed state is set for each contact input point, and for example, “ON”, “ON”, “OFF”, and “OFF” are set for the input points A500, A510, A511, D560, respectively.

These pieces of defect input determination information are set corresponding to the transition of the plant state at the time of starting the plant, and no two or more conditions are satisfied at the same time.

The condition determination processing means 15 sequentially determines whether or not the processing execution start condition of each of the defective input determination information is satisfied, and if there is a satisfied condition, notifies the defective input determination processing means 17 to that effect, and The condition number of the satisfied condition is stored in the satisfied condition number storing means 18.

3A and 3B show a processing example of the defective input determination processing means 17.

When the condition determination processing means 15 issues an instruction to start processing, the defective input determination processing means 17 extracts the satisfied condition number from the satisfied condition number storage means 18 and the content of the defective input determination information having that condition number. Is read (process 101), and the loop counter i is initialized to 0 (process 102).

Then, the loop counter i is incremented (Processing 10
3), the data of the i-th analog input point Pi is retrieved from the input data storage means 5 (process 104), and it is checked whether or not the analog input point Pi deviates from the input range (decision 105).

If the result of judgment 105 is YES, the analog input point Pi
Check whether the input signal range deviation specified input point is set (decision 106), and when the result of judgment 106 is NO, the input point Pi is stored in the output data storage means 19 as the range deviation input point ( Process 107).

Then, until the processing for all points is completed (decision 108
Until the result is YES), the process returns to the process 103 to process the next analog input point Pi.

When the result of determination 108 is YES, the loop counter j is initialized to 0 (process 109).

Then, the loop counter j is incremented (process 11
0), the data at the jth input point Qj of the analog input value specified range information is retrieved from the input data storage means 5 (process 111), and the input point Qj is input to the output data storage means 19 as a range deviation input. It is determined whether the points are stored (decision 112).

When the result of judgment 112 is NO, it is judged whether or not the input point Qj is within the analog input value specified range (judgment 11
3) If the result of judgment 113 is NO, the input point Qj is stored in the output data storage means 19 as an abnormal value input point (process 114).

Then, until the processing for all points set in the analog input value specified range information is completed (the result of judgment 115 is Y
(Until ES), the process returns to step 110 and the process for the next input point Qj is executed.

When the result of the determination 115 is YES, the loop counter k is initialized to 0 (process 116).

Then, the loop counter k is incremented (process 11
7), the data of the input point Dk corresponding to the kth contact input specified state information is retrieved from the input data storage means 5 (process 118), and the input point Dk is set as the contact input specified state information. It is determined whether the state is the same (decision 119).

When the result of determination 119 is NO, the input point Dk is stored in the output data storage means 19 as an abnormal state input point (process
120).

Then, until the processing for all the points set in the contact input specified state information is completed (until the result of the determination 121 is YES), the process returns to the processing 117 and the processing for the next input point Dk is executed.

When the result of the determination 121 is YES, the determination processing has been completed for all input points, so the display processing means 9 is instructed to start the display processing and the print processing means 10 is instructed to start the print processing (processing 122). ).

In this way, the defective input determination processing means 17 determines whether or not each input point is defective based on the defective input determination information determined by the condition determination processing means 15.

FIG. 4 shows an example of the input point defect list TB recorded and output from the printer 12.

In this input point defect list TB, a column R1 in which a title is recorded, and a column R2 in which the defect input determination processing means 17 determines as a range deviation input point and displays the input points stored in the output data storage means 19 as a list A column for displaying a list of the input points and their input values (engineering unit system display) stored in the output data storage means 19 after the defective input determination processing means 17 determines them as abnormal value input points.
R3 and a column R4 for displaying a list of the input points stored in the output data storage means 19 which the defective input determination processing means 17 has determined as an abnormal state input point and the state thereof.

With the above configuration, for example, it is assumed that the reactor internal temperature rises to 180 degrees during the startup operation of the nuclear power plant.

At this time, since the processing execution start condition of the defect input determination information of condition number 1 is satisfied, the condition determination processing means 15 stores the condition number 1 in the established condition number storage means 18, and
The defective input determination processing means 17 is instructed to start processing.

Thereby, the defective input determination processing means 17 executes the above-described processing, determines the range deviation input point, the abnormal value input point, and the abnormal state input point, respectively, and outputs the determination result to the output data storage means 19. The display processing means 9 and the print processing means 10 are stored at the time when the determination processing is completed.
To start processing.

This allows the printer 12 to display the above-mentioned list of input point defects.
TB is recorded and output, and a display having the same content is displayed and output from the display device 11.

As described above, according to the present embodiment, the determination processing of the defect at the input point is performed based on the state change of the process signal,
Since the determination result is displayed on the display device 11 and is recorded and output from the printing device 12, it is not necessary for the supervisor to perform a special operation.

Further, since the information for the defect determination also includes the information of the input points excluded from the determination target at the time of the determination, it is possible to perform the accurate input point determination.

[Effects of the Invention] As described above, according to the present invention, the failure determination timing and the proper state of the output signal of each input point at that timing are registered in advance, and the failure determination timing is reached. Since the input point that is not in the proper state is judged and displayed and output at that timing, the defect of the input point is automatically judged even if the operator does not operate the command, and the judgment result is displayed in a list. The effect of significantly reducing the burden on the operator is obtained.

[Brief description of drawings]

FIG. 1 is a block diagram illustrating a plant monitoring apparatus according to an embodiment of the present invention, FIG. 2 is a schematic diagram showing an example of defective input determination information, and FIGS. 3 (a) and 3 (b) are defective input determinations. FIG. 4 is a flow chart showing an example of processing of the processing means, FIG. 4 is a schematic diagram showing an example of an input point defect list, and FIG. 5 is a block diagram showing an example of a conventional device. 3 ... Input signal processing means, 5 ... Input data storage means,
15 ... Condition determination processing means, 16 ... Bad input determination information storage means, 17 ... Bad input determination processing means, 18 ... Satisfied condition number storage means, 19 ... Output data storage means.

Claims (1)

[Claims] 1. A plant monitoring device for monitoring a defect of a process signal input device arranged in each part of a plant, wherein a defect determination timing and an appropriate state of an output signal of each process signal input device at that timing are registered. Storage means for storing the failure input determination information, condition determination processing means for determining that the failure determination timing has been reached based on the stored contents of the storage means, determination result of the condition determination processing means and storage of the storage means A plant monitoring apparatus comprising: a defective input judging means for judging a defect of the process signal input device based on contents; and a display means for displaying a judgment result of the defective input judging means.