JPH0693203B2 - Automatic plant operation controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a plant automatic operation control device having a hierarchical structure composed of an upper control computer and a plurality of lower control devices.

(Prior Art) In a recent plant operation control system such as a thermal power plant, a hierarchical system including a plurality of control devices and a control computer is adopted. In this system, the control devices are distributed to each system to automatically operate the plant, each system is made independent, and the plant information related to each system is processed inside the control device that controls that system. . Then, if an abnormality occurs in each system and the control is congested, it will be immediately reported to the upper control computer,
The display device displays the cause of the traffic jam and informs the operator.

FIG. 6 shows a hierarchical distributed system including a plurality of control devices. The upper control computer 1, the lower control device 2 and the display device 3 are respectively a computer room 100 and a control equipment room 101.
And control computers 1 distributed in the central control room 102
And each control device 2 are connected by a transmission cable 5 via a data transmission device 4. The plant state condition judging means 6 in each of the subordinate control devices 2 is for inputting the plant state quantity a from the plant 7 and detecting a plant abnormality and thus a control congestion of the plant.

With the above configuration, the operation command from the control computer 1 is normally sent to the control device 2 via the data transmission device 4. Based on this, the control device 2 outputs the operation command b to control the plant 7. During this period, the internal plant state condition determining means 6 monitors the plant state of the plant 7 by inputting the plant state quantity a and making a condition determination. If the plant state is normal, the control device 2 continues to control the plant 7, and if an abnormality occurs in the plant state and control is congested, the control computer 1 is immediately sent via the data transmission device 4. The congestion factor message C is displayed on the display device 3.

(Problems to be Solved by the Invention) FIG. 7 is a diagram focusing on one of the lower-order control devices 2 in FIG. 6, and as shown in FIG.
In response to the operation command b ′ from the controller 2, the control device 2 inputs the plant state quantity a and outputs the operation command b to control the plant 7. Once the plant condition judgment unit 6 detects a traffic jam, the traffic jam factor d is output, the traffic jam factor message C is displayed and output on the display device 3, and the operation command b of the control device 2 is output for safety. Stop and interrupt control progress. However, many of the abnormalities detected by the control device 2 are not the ones caused by the plant abnormalities as judged from other plant state quantities, but are simply presumed to be defects on the sensor side. In the above-mentioned conventional control system, since it is judged that all of them are abnormal, the progress of control is often interrupted, and the operator switches to manual operation or operates.
Alternatively, there is a problem that it is necessary to go to a control equipment room or a site far away to investigate and repair the cause of the traffic jam and open the control again.

Therefore, it is an object of the present invention to provide a plant automatic operation control device that prevents control congestion factors due to these non-plant abnormalities and allows the plant control to proceed smoothly.

[Structure of the Invention] (Means for Solving Problems) The present invention relates to a plant state condition judging means for periodically inputting a plant state quantity to judge a condition in order to monitor a plant state. When an input is made to ignore the judgment condition, a function for judging the condition by excluding the input ignore condition is added, and a dialogue device with the control computer for inputting the ignore condition. Is provided.

(Operation) As a result, when the operator clearly determines that the sensor side is defective even if a traffic jam occurs, the traffic jam factor is excluded by inputting the traffic jam factor as an ignoring condition from the dialogue device. The condition determination will be performed again, and the control once congested can be resumed.

(Embodiment) FIG. 1 shows a configuration according to an embodiment of the present invention. The same parts as those in FIG. 7 are designated by the same reference numerals. Also, in this figure, although there are a plurality of control devices 2, only one of them is shown and the others are omitted. In FIG. 1, the dialogue device 8 is for realizing a conversation with the system in response to a message from the system displayed on the display device 3. The condition disregard storage device 9 stores the input from the dialog device 8 and outputs the congestion factor disregard command f to the control device 2 via the data transmission device 4. The plant state condition judging means 6 judges the condition by excluding the condition to be ignored by the traffic congestion factor ignoring command f.

Next, the operation of the plant automatic operation control device having the above configuration when a congestion factor occurs will be described below.

Normally, the control device 2 inputs the plant state quantity a from the plant 7 based on the operation command b ′ from the control computer 1,
The internal plant state condition judging means 6 checks whether or not a traffic jam has occurred due to a plant abnormality,
After confirming that the operation is normal, the operation command b is output to perform the next control. Further, the control computer 1 inputs the plant state quantity a ′ from the control device 2 and displays the plant state and the like on the display device 3.

Now, when the plant state quantity a from the plant 7 is input and the plant state condition judging means 6 detects a congestion factor due to a plant abnormality, first, the congestion factor d is output to the control computer 1. The control computer 1 converts this into a congestion factor message c and sends it to the display device 3 to display the congestion factor message. The operator looks at this and judges whether it can be ignored by referring to other plant state quantities etc. whether the congestion factor is actually caused by a plant abnormality or simply caused by a sensor failure etc. . As a result,
When it is determined that the condition can be ignored, the interactive device 8 inputs the condition ignore request e to the control computer 1. This condition ignore request e
Is stored in the condition disregard storage device 9 in the control computer 1, and is also output to the control device 2 as a traffic congestion factor disregard command f. Based on the traffic congestion factor ignoring command f, the plant state condition determination means 6 next condition-determines the plant state quantity a by excluding the traffic congestion factor. Then, the same procedure is repeated until the congestion factor disappears, and when the congestion factor disappears, the control device 2 outputs the next operation command b and advances the control of the plant.

FIG. 2 is a flow chart showing the processing performed in the lower control device 2.

Read the plant state quantity a from the plant 7 (20
1), traffic congestion factor ignore command f input from the control computer 1
The plant status is checked except for the condition of (202).
If the condition is not satisfied, the process (203) is passed Yes and the congestion factor d is output to the control computer 1 (204) and the plant state quantity a ′ is output to the control computer 1 (20
Five). After a certain period of time (206), the plant state quantity a is read (201), and the plant state is checked again except for the condition of the traffic congestion factor ignore command f output from the control computer 1 (202). This time, the operator inputs the condition disregard request e by the dialogue device 8, so the process (203) is No.
Pass by. As a result, the following various operation processes (valve opening / closing, pump start / stop, etc.) are executed (207).

Next, in order to describe the above operation more specifically, the operation of the process of the condenser vacuum master (vacuum rise I) by the control device 2 will be described as an example with reference to the logic diagram of FIG.

When the vacuum rise command (a) is output from the control computer 1 via the data transmission device 4, the control device 2 causes the grand steam auxiliary steam drain trap front valve fully open (a), the grand steam exotherm start (c), and the CV. Operate the front valve fully open (d) one after another. On the other hand, the plant state quantity a is also read. The condition for completing the condenser vacuum master (vacuum rise I) is that the CV front valve fully open (d) and AND10 of gland steam pressure> 0.11 ATG (e) are satisfied. If the completion condition is satisfied, this AND10 becomes active, and the process proceeds to the next step, vacuum rise II condenser vacuum pump startup (f) operation. However, when the completion condition is not satisfied, for example, 0.11 AT due to an abnormality in the gland steam pressure sensor, etc.
When it does not exceed G, the output of AND10 is input to one input terminal via INVERTER11, and the other input terminal is input from vacuum rise command (a) via TIMER12 AND13 is
After a certain period of time from the time when the vacuum rise command (a) is requested, it is determined that there is congestion and becomes active, and the item of ground steam pressure as a congestion factor d is transmitted to the control computer 1 via the data transmission device 4. Then, the control computer 1 displays the congestion factor message C on the display device 3 to inform the operator of the congestion factor. Therefore, the operator determines that this congestion factor is due to an abnormality in the sensor etc. and that the ground steam pressure is actually 0.11 ATG or more from other plant state quantities, etc., and this congestion factor can be ignored. When the determination is made, the dialogue device 8 inputs the condition ignoring request e of the congestion factor into the control computer 1. The ignored congestion factor is stored in the condition ignoring storage device 9 and is also input to the plant state condition judging means 6 of the control device 2. As a result, this time it is possible to control the next step that was interrupted by checking the completion condition again except for the condition (e) of the ground steam pressure, and to start the condenser vacuum pump of vacuum rise II ( It is possible to proceed to the control of (f).

As described above, the condition causing the congestion can be excluded from the determination of the plant state condition, whereby the automatic plant operation without congestion can be performed.

It should be noted that a large number of ignoring conditions stored in the ignoring condition storage device 9 can be collectively known when a request is made from the dialogue device 8 and can be displayed as a list on the display device 3 so that the plant operation progress is progressed. In particular, it can be used to analyze the cause of ignored items.

FIG. 4 shows another embodiment of the present invention. Main plant event monitoring means for monitoring a main plant event (ignition, ventilation, coexistence, etc.) in the host computer 1 for control. 14 is added. The rest of the configuration is the same as that of the above-described embodiment, and the portions corresponding to the configuration of FIG. This main plant event monitoring means 14 retrieves, for each major plant event, the conditions that were ignored in the past from the condition ignoring storage device 9 and conditions the control device 2 so that they can be automatically collectively returned via the data transmission device 4. The ignore return command g is output.

With this configuration, collective restoration of conditions ignored in the past is performed at a break point at the start / stop of each plant event, as shown in FIG. That is, in FIG.
The timing of t ₁ indicates that a traffic jam occurred due to an abnormality of the sensor during the condensate cleanup, and the operator told the dialogue device 8
By performing the condition ignoring request e of the congestion factor by the above, the condition ignoring request e is stored in the condition ignoring storage device 9, and the control computer 1 outputs the congestion factor ignoring command f to the control device 2 and the control device It is possible to eliminate the factor of the traffic jam that determines the condition of the plant state condition determining means 6 in 2 and to make the plant proceed smoothly. The timing of t ₂ is a breakpoint that moves to the operation of high pressure cleanup. At this time, the condition that the condition ignore request e is made at the timing of t ₁ is not subject to the condition judgment of the plant state during the condensate cleanup, but at the next break point, the condition is determined by the main plant event monitoring means 14. The ignore return command g is output, the conditions that were not subject to the condition determination in the condensate cleanup are collectively restored, and in the control of the high pressure cleanup, the plant state condition determining means 6 is again subject to the condition determination. .

As a result, even if the operator forgets to perform the return operation, it will not be excluded from the condition judgment at the next major plant event, for example, operation at start / stop, and will be displayed again as a cause of traffic congestion. The staff can reconfirm them and can operate the plant safely.

[Effects of the Invention] As described above, according to the present invention, it is possible to easily remove a congestion factor that has occurred irrespective of a plant abnormality, and to perform automatic operation of a plant with a high operation rate without congestion in each control of the plant. Can be done.

[Brief description of drawings]

FIG. 1 is a block diagram of a plant automatic operation control device according to an embodiment of the present invention, FIG. 2 is a flow chart of processing of the control device of FIG. 1, and FIG. 3 is a condenser vacuum master (vacuum rise I). Logic diagram of process operation, FIG. 4 is a configuration diagram of a plant automatic operation control device according to another embodiment, FIG. 5 is an operation time chart for each break point of a main plant event according to FIG. 4, and FIG. FIG. 7 is a configuration diagram of the plant automatic operation control device of FIG. 7, and FIG. 7 is a configuration diagram of one system of FIG. 1 ... Control computer, 2 ... Control device, 3 ... Display device, 4 ... Data transmission device, 5 ... Transmission cable, 6 ...
... Plant state condition judging means, 7 ... plant, 8 ...
Dialogue device, 9 ... Condition disregard storage device, 10, 13 ... AND, 11
…… INVERTER, 12 …… TIMER, 14 …… Main plant event monitoring means.

Claims (1)

[Claims] 1. A plant state condition determining means for conditionally determining a plant state quantity and monitoring plant congestion is provided internally,
A plurality of lower-level control devices that directly control the plant and send operation commands to these lower-level control devices, and the plant state condition determination means detects plant congestion and the control device reports the congestion of the plant. When, with a higher-order control computer having a display device for displaying the plant congestion factor, in a plant automatic operation control device forming a hierarchical structure, to the control computer a command to ignore the plant congestion factor A dialogue device for notifying and a condition ignoring storage device for storing the plant congestion factor ignoring command are provided, and by transmitting the plant congestion factor ignoring command from the control computer to the control device, the control device causes the plant congestion factor ignoring command. The plant automatic operation control device is characterized in that the conditions are judged again except for.