JPH01155212A - Plant monitor apparatus - Google Patents

Abstract

PURPOSE:To monitor a plant, by making it possible to indicate a period showing the transition of the quantity of state of a process and indicating the past defi nite period and the present time to simultaneously display the transition of the quantity of state. CONSTITUTION:When a mode A is selected by a display mode selection means 8, the data of a predetermined item is read from a data preserving memory 3 and, for example, the transition of the quantity of state of a plant P from the point of time before 3hr to the present time is displayed on the left half of the picture of a display device 13. Next, when a mode B is selected, the present value of the data of the predetermined item is successively read from a present value renewing means 9. The time figure of the picture moves to the right half to reach the right-hand end after 3hr and the display on the right half of the picture moves to the left half and data is continuously displayed from the center to the right. Since a time width can be freely indicated in the past and on and after the present point of time with respect to the indication of a display period, desired display content can be easily obtained. The transition of the quantity of state of every process is simultaneously displayed and the transitions of both of them can be easily compared.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a plant monitoring device that monitors a power plant or the like by displaying temporal changes in process state variables.

(Prior Art) In recent plant systems, it has become common practice to display various process state quantities on display devices and monitor them.

Conventional methods of displaying process state quantities can be roughly divided into the following two types:
Can be classified into types.

One of them is to sequentially display the current values of process state quantities. In this case, the operator requests display of the current value from the operator console and specifies the display item that is the desired process point to be displayed.

As a result, the display shows 1, for example, in FIGS. 9(a) to (C).
) is displayed on the screen. That is, in the figure, each line indicates the process state quantities of four points, which are the main process state quantities in one power plant: main steam temperature, main steam pressure, reheat steam temperature, and reheat steam pressure, and the horizontal axis of the screen represents time. The axis and numbers indicate time relative to the current time.

Figure (a) shows the screen immediately after the above operation, and the current values of each of the above process state quantities are displayed sequentially from 15 minutes ago to the present time, and how each of them has changed over time is shown on the left side of the screen. Half of it is displayed.

Thereafter, the number indicating the time moves to the right at regular intervals, and the current value of each process state quantity at each time point is sequentially displayed at the current "0" position. Figure (b) shows the screen after 15 minutes.

Also, as shown in this figure, when one display amount fills the entire screen, the display on the right half of the screen moves to the left half, as shown in (c), and the display changes as in (a). I can continue.

In this way, when the operator sets the current value to be displayed, the changes from a preset period of time, for example 15 minutes ago, are displayed first, and then the current value is displayed sequentially at regular intervals. It was displayed.

Next, another display method is to display process state quantities for a certain period in the past. In this case, the operator is using the operator console.

Specify past display requests, their display period, and desired display items.

This causes the display to appear as shown in Figure 1O.

For example, the transition of each process state quantity from 10 hours ago to 7 hours ago is displayed on the screen.

In this way, if you specify an arbitrary period in the past, the changes over that period will be displayed.

(Problem to be solved by the invention) By the way, in plant monitoring, for example, when a fluctuation occurs in a plant and a process state quantity causes an abnormal fluctuation, similar fluctuations that have occurred in the past are investigated and the You may want to compare.

However, in the conventional display method described above, the operations and display sides when viewing past and present process state quantities are independent.

For this reason, it is not possible to view past and current process state quantities at the same time, and when switching the display screen, the operator must perform a predetermined operation each time.
There is a problem in that it is not easy to monitor plant conditions while comparing changes in past and present process state quantities.The present invention solves the above problem and It is an object of the present invention to provide a plant monitoring device that can easily compare changes in quantity.

[Structure of the Invention] (Means for Solving the Problems) For this purpose, the present invention provides the following features for the operator console:
In addition to specifying the items of various process state quantities to be displayed, it is also possible to specify the period for displaying the transition of various process state quantities by any method from a fixed period in the past, the present, or a fixed period in the past and the present. I have to. Then, when a certain period in the past and the present are specified, the trends in the corresponding past and present various process-like 1s quantities are calculated as 1s.
The feature is that the screen is displayed on two displays at the same time.

(Operation) By specifying the period for displaying the transition of various process state quantities on the operator console as a desired fixed period in the past and the present, changes in the various process state quantities in the past and present can be displayed. They are displayed at the same time, allowing you to easily compare the progress of both.

(Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a block configuration of a plant monitoring device according to an embodiment of the present invention. In the figure, a plant input device 1 inputs various process state quantities from a plant P at regular intervals. The data collection means 2 reads various process state quantities from the plant input device 1, and the data storage memory 3 stores the various process state quantities read.

The operator console 4 is used by the operator to perform various predetermined display request operations. The item setting means 5 is for displaying the display items specified by the operator console 4, and the display period setting means 6 is for displaying the display items for the display period specified by the operator console 4.

The display period determining means 7 determines whether the display period is in the past, after the present, or in the past and after the present, and the display mode selecting means 8 selects the display mode for historical display according to the determination result. Mode This is to set the current value update mode.

The current value updating means 9 sets various process state quantities periodically read from the data collection means 2 via the switch circuit sb as current values.

The display data selection means 10, according to the display mode,
The data storage memory 3 or the current value updating means 9 is selected and various process state quantities of the corresponding period and item are read.

The display format setting means 11 sets a format for displaying the transition of each process state quantity on the screen according to a designated display period. The display control section 12 outputs each data inputted from the display data selection means 10 via the display mode selection means 8 to the display 13 for display on the screen.

The display period resetting means 14 resets the display period when a request for resetting the display period is made to the operator console 4.

With the above configuration, various process state quantities from the plant P are read by the data collection means 2 via the plant input device 1 at predetermined intervals. The read state quantity is
It is saved in the data storage memory 3 as plant data.

Next, a method for saving plant data will be explained.

FIGS. 2(a) and 2(b) show the data storage memory 3. Here, as an example, we will consider a case where plant data for the past 72 hours is stored every minute.

Data storage memory 3 has slot numbers 1 to 4320.
A circular buffer is formed.

Then, every minute, a predetermined number of plant data, which are process state quantities, are stored in the circular buffer in the order of their slot numbers.

Now, as shown in Figure (a), if we look at the case where the current process data is stored in the area of slot number 7, the area of slot number 6 contains data from one minute ago,
The area of slot number 8 stores data from 72 hours ago.

Looking at one minute later, as shown in FIG. 6(b), the current data is stored in the area of slot number 8, and the data of the current time is stored in the area of slot number 7.

Data from one minute ago, slot number 9, stores data from 72 hours ago.

In this way, the latest plant data corresponding to the storage capacity of the data storage memory 3 is stored for a certain period of time.

When the operator wants to monitor the plant, such as during plant fluctuations, he specifies the desired display items, ie, the process point and display period, by operating the operator console 4, and makes a display request.

As a result, the item setting means 5 sets the display item according to the specified display item, and the display period setting means 6
Set the display period. Next.

The display period determining means 7 determines whether the designated display period is in the past, after the present time, or from the past to the present.

The display mode selection means 8 selects history display mode A (hereinafter simply referred to as mode A) or current value update mode B (hereinafter simply referred to as mode B) in accordance with the above determination result.
Set the display mode to .

For example, when mode A is selected, the display data selection means 10 reads out the plant data of each item set by the item setting means 5 for the period set by the display period setting means 6 from the data storage memory 3. When mode B is selected, the current value updating means 9 is activated, the switch circuit sb is closed, and the display data selection means 1o takes out the plant data from the current value updating means.

The display format setting means 11 is one display period setting means 6.
Set the display format when displaying plant data on the screen according to the display period set in . The display control section 12 inputs the plant data read out by the display data selection means 10 via the display mode selection means 8 and displays it on the display 13 according to the above format.

FIGS. 3(a) to 3(c) show examples of display screens when the operator specifies on the operator console 4 that the display period is from 3 hours before to 3 hours after. In this case, first, the display mode selection means 8 selects
The display mode is set to mode A.

Plant data of predetermined items are sequentially read out from the data storage memory 3. As shown in Figure (a), the left half of the screen displays the plant P from three hours ago to the current moment.
The changes in various state quantities are displayed.

In the figure, each line represents various state quantities, the vertical direction indicates the level of the various state quantities, and the horizontal axis is the time axis. Also,
The numbers at the bottom indicate the time relative to the current time.

After the above-mentioned display up to the present time, mode B is set by the 1-display mode selection means 8, and the current values of the plant data of predetermined items are read out one after another from the current value updating means 9.

As a result, the numbers indicating time on the horizontal axis of the screen of the display 13 sequentially move to the right, and various state quantities of the plant P are displayed one after another at the "0" position indicating the current time. Then, after 3 hours, as shown in the same figure (b).

It is displayed all the way to the right side of the screen.

Thereafter, the display on the right half of the screen moves to the left half, as shown in FIG. 12(c), and the images are successively displayed on the right side of the center of the screen, as in FIG. 12(a).

Next, FIGS. 4A to 4C show examples of display screens when the operator specifies that the display period is from 4 hours before to 2 hours after. In this example,
First, as shown in FIG. 5(a), the past four hours are displayed, and in this case, after two hours, the screen becomes full as shown in FIG. 4(b).

Also, in this case, when the screen is full, next.

As shown in FIG. 4(c), the past three hours are displayed on the left half of the screen, and then the current values are displayed one after another on the right side in the same way as above.

The two display examples described above both range from the past to the present time, but it is also possible to display a certain period in the past and the present at the same time.

Figures 5 (a) to (C) show examples of such display screens, where the operator specifies that the display period is from 10 hours ago to 7 hours ago, and that the display period is specified as after the current time. This is from when.

In this case, first, as shown in FIG. 5A, the designated period is displayed on the left half of the screen, and the current values are displayed one after another on the right half. As shown in (b) of the same figure, after 3 hours, when the screen on the right side becomes full, the display on the right half of the screen is moved to the left side, as shown in (c) of the same figure, and then , similarly displays the current value.

In addition, although the three display examples described above all display the past and the present and subsequent times, it is also possible to display both independently.

FIG. 6 shows an example of the display screen when the operator specifies that the display period is from 8 hours before to 5 hours before. In this case, corresponding displays are sequentially performed from the left end of the screen, and when the screen reaches the fullest, the screen display is erased, and then the same display is repeated.

Further, FIGS. 7(a) to 7(c) show examples of display screens when the display period is specified to be after the present time. 3(a) shows the display screen 3 hours after the start of display, and FIG. 4(b) shows the display screen 3 hours later. In this case, as shown in (b) of the same figure, when the screen becomes full, the display for 3 hours is moved to the left half of the screen, and the current values are sequentially displayed on the right side, as shown in (c) of the same figure. be done.

When displaying the changes in process state quantities over a certain period of time in the past as described above, if the operator wants to display the changes following that period, the operator can use the operator console 4
5. Request to reset the display period and specify whether it is before or after the current display period.

When this operation is performed, the display period resetting means 14
The display period setting means 6 sets the corresponding display period based on the currently displayed display period and the designation of whether it is before or after the above display period.
Specify. As a result, the specified display is performed.

For example, if the display period in one display is from 10 hours ago to 6 hours ago, and a reset request is made before that period, the display from 14 hours ago to 10 hours ago will be displayed on the first screen. . Furthermore, when a reset request is made after the above-mentioned period, the next screen will display from 6 hours ago to 2 hours ago.

As described above, according to the present invention, the display period for displaying the transition of various process state quantities of the plant P can be arbitrarily specified in the past and after the present time, and both can be specified at the same time on one screen. so that they can be displayed simultaneously.

Therefore, as mentioned above, for example, when fluctuations occur in the plant and the process state quantities change abnormally,
If you want to investigate similar fluctuations that occurred in the past and compare them, you can specify the desired period in the past and the period after the present time, and then you can check the transition of the process state quantity between the past and the present.
This allows for easy comparison. This results in
By referring to similar trends in past process state quantities, the current plant state can be accurately grasped, and efficient and appropriate plant monitoring can be performed.

In addition, the display period can be specified in the past or after the present time.
Since each time width can be freely specified, desired display contents can be easily obtained.

Next, FIG. 8 shows a block diagram of a plant monitoring device according to another embodiment. In the figure, the first
The difference from the figure is that monitoring limit value setting means 15, monitoring limit value determining means 16, and alarm output means 17 are newly provided.

With this configuration, in the monitoring limit value setting means 15, a level considered to be abnormal is set as a monitoring limit value for various process state quantities of the plant P in advance from the operator console 4, and the limit value If you deviate from the
Set the process state quantity items you want to display on the screen and the display period.

The monitoring limit value determining means 16 monitors various process state quantities of the plant P read by the data collecting means 2,
When the monitoring limit value set in the monitoring limit value setting means 15 is exceeded, the alarm outputting means 17 is activated to output an alarm. Also, at this time, the display data selection means 10 is notified of the type of item that deviated from and the display items set in the monitoring limit value setting means 15. Furthermore, the display period setting means 6 sets the display period set in the monitoring limit value setting means 15.
Notify.

As a result, the other parts operate in the same manner as described above, and the various process state quantities at that time are displayed on the screen on the display 13.

According to this configuration, if any abnormality occurs in the plant P, it can be known quickly without operator operation, and various state quantities at that time can be appropriately confirmed.

[Effects of the Invention] As described above, according to the present invention, the period for displaying the transition of various process state quantities on the operator console can be changed between a certain period in the past, the present, or a certain period in the past and the present. The changes in various process state quantities are displayed under the specified conditions. and the current trends in various process state quantities are displayed simultaneously, making it possible to easily compare the changes in both.

[Brief explanation of the drawing]

FIG. 1 is a block configuration diagram of a plant monitoring device according to an embodiment of the present invention, FIGS. 2(a) and (b) are explanatory diagrams showing a method of saving plant data in a data storage memory, a) to (C), Fig. 4 (a) to (C), Fig. 5 (
a) to (c), FIG. 6, and FIG. 7 (a) to (c) are explanatory diagrams showing screen display examples at the time of various display requests, and FIG. 8 is a plant monitoring according to another embodiment of the present invention. The block diagrams of the apparatus, FIGS. 9(a) and 10, are explanatory diagrams showing examples of screen displays when various display requests are made in the conventional plant monitoring apparatus. 1... Plant input device, 2... Data collection means,
3... Data storage memory, 4... Operator console, 5... Item setting means, 6... Display period setting means, 7... Display period determining means, Death... Display mode selection means, 9 ...Current value updating means, lO...Display data selection means, 11...Display format setting means, 1
2...Display control unit, 13...Display device, 14...Display period resetting means, 15...Monitoring limit value setting means, 1
6...Monitoring limit value determination means, 17...Alarm output means, P...Plant, sb...Switch circuit. (7317) Agent: Patent Attorney Noriyuki Chika (
8869) Ken Daishimaru (a)
(b) Figure 2 Figure 5 Figure 6 Figure 7 Figure 9 Figure 10

Claims (2)

[Claims] (1) A plant input device that inputs various process state quantities of the plant, a data collection means that reads the various process state quantities at regular intervals via the plant input device, and stores the read various process state quantities. a data storage memory that outputs the various process state quantities read at regular intervals as current values; and an operator console that specifies the period for displaying changes in the various process state quantities and the items to be displayed. In a plant monitoring device equipped with a display device that displays changes in various process state quantities on a screen according to the specifications, the period for displaying changes in the various process state quantities can be set to a certain period in the past, the present, or a certain period in the past. and now,
a display period setting means for setting any one of them, a display item setting means for setting items of various process state quantities to be displayed, and whether the set display period is in the past or the present. , a display period determining means for determining whether the display period is past or present, and when the result of the display period determination is in the past, the mode is set to history display mode, when the result is present, the mode is set to current value update mode, and when the result is past or present, the display period is set to the current value update mode; display mode selection means for respectively setting a current value update mode after a history display mode; and a display mode selection means for respectively setting the various process state quantities from the data storage memory while the display mode is in the history display mode; During the update mode, display data selection means extracts the data from the current value update means, display format setting means sets a format for displaying the changes in the various process state quantities on the screen, and selects the display data according to the set display format. a display control unit for displaying on the display the changes in the various process state quantities extracted by the selection means; A plant monitoring device characterized by displaying past and present information on a display at the same time. (2) In the scope of claim 1, when a reset designation is made from the operator console, a display period that is automatically set as a continuous display period to the display period currently being displayed on the screen at that time. A plant monitoring device characterized by comprising resetting means.