JPH0376520B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to scientific plants, thermal power plants,
The present invention relates to a plant operator support device that supports plant operation by displaying the plant status when an abnormality occurs in a plant such as a nuclear power plant.

[Technical Background of the Invention and Problems thereof] When some abnormality occurs during the operation of a plant such as a chemical plant, thermal power plant, or nuclear power plant, a large number of alarms are generated simultaneously. At this time, plant operators are required to correctly judge the plant status based on these warnings and take appropriate appropriate measures.

By the way, warning lamps are usually used for these warnings, and for example, important warnings are distinguished by color, such as red, or by placement, such as placing them on the top, so that they can be recognized at a glance. Consideration has been given to visibility.

However, for example, in the case of a recent 1.1 million KW class boiling water nuclear power plant, there are over 1,000 alarm lamps in the central control room, and when an event such as a reactor scram occurs, more than 100 of these warning lamps are activated. The warning lamp will be lit.

Also, if a major event such as loss of external power occurs, 400
The warning lamps before and after the alarm will light up.

Under such circumstances, even if the warning lamps were differentiated by color, arrangement, etc. as described above, there was a problem in that too many warning lamps were lit and the effect could not be expected.

In addition, equipment that operates in each plant operation mode,
Determine the equipment to be stopped, generate an alarm when an abnormal signal is generated in the equipment other than when the equipment to be stopped is stopped, and eliminate unnecessary abnormalities.
An alarm display device (see Japanese Unexamined Patent Publication No. 134713/1983) has been proposed that notifies plant operators only of true abnormalities. However, this alarm display device
Since an abnormal signal is used as a condition for generating an alarm, there are problems such as, for example, if a device does not operate in response to a request for operation, if there is no abnormal signal, no alarm will be generated and monitoring of non-operation will not be possible. There was a demand for the development of plant operator support equipment that could meet these demands.

[Object of the invention] The present invention has been made in view of the above circumstances, and
The purpose is to provide a plant operation support device that can easily grasp the state of the plant at the time of plant abnormality.

[Summary of the Invention] In order to achieve the above object, the present invention distinguishes truly important alarms that should be generated when a plant abnormality occurs, and hierarchizes the discriminated alarms into a plant system level and an individual alarm level. This information can be easily obtained using a CRT display device, touch screen device, etc.

That is, the main function of an alarm is to call the attention of plant operators when an abnormality occurs, and for this purpose, the alarm to be generated needs to express the abnormal state in some sense. In other words, information on secondary events accompanying the cause event and duplicate information is suppressed, while information on equipment that does not function at the time when it is required to function is provided. . For truly important alarms discriminated in this way, for example, two color CRT display devices are used, one of which displays the main information of the alarm (e.g. alarm generation system,
The other unit displays auxiliary information (e.g., piping and instrumentation diagram of the alarm generation system, generation logic of individual alarms, treatment procedures for each alarm, etc.), and the selection of these display information. The present invention provides an alarm system that can easily grasp the situation when an abnormality occurs in a plant by using a touch screen. The touch screen device is a transparent plate-like finger-contact type position coordinate input device that is installed in front of the CRT monitor, and input operations can be performed by touching the screen surface while looking at the CRT screen. It is easy to understand the situation.

[Embodiments of the invention] Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention. Signals necessary for determining the state of the plant are input from the nuclear power plant 1 to the state determining device 3 via the signal input device 2 . Here, the types of signals include, for example, neutron flux, pressure, water level, flow rate,
Process variables such as temperature, equipment control signals, status signals of plant component equipment (e.g. pumps, valves), etc. These signals are sampled at fixed time intervals by the signal input device 2, converted into digital values, and then converted into digital values. It is stored for a certain period of time as necessary.

The state determining device 3 determines the state of the plant or equipment based on the data from the signal input device 2. Methods for determining this state include comparing sampling data with a predetermined threshold value for each signal, that is, a limit value for determining an abnormality, and using a logical formula that expresses the normal state of the device as a combination of logical variables. It is based on false judgment. Based on these determinations, the status determining device 3 determines the presence or absence of an abnormal signal. A signal determined to be abnormal becomes a candidate for an alarm to be generated.

In the next alarm generation device 4, based on the judgment result of the state judgment device 3, from among the generation alarm candidates, for example, as shown in (1) to (4) below, the alarm generation device 4 selects the truly necessary one based on the causal relationship between events, as shown in (1) to (4) below. Identify whether to issue an alarm or not. That is, (1) If the device does not operate despite an activation request, that is, if it is inoperable, an alarm is generated.

(2) An alarm is generated if the device stops even though there is no request to stop, or if the device starts operating even though there is no request to start, that is, if it malfunctions.

(3) Alarms caused by secondary events, such as low discharge pressure of a stopped pump, are suppressed. Abnormal events that cause secondary events are generated as alarms.

(4) For priority warnings, priority is given to warnings with greater severity. For example, if a low water level alarm is occurring, the low water level alarm is suppressed.

Furthermore, the display control device 5 performs control to display the alarm generated by the alarm generation device 4 on a CRT display device, and displays devices such as a color CRT display device or a plasma display device (both of which are equipped with a touch screen device). to be displayed.

Next, display control using two color display devices as the display control device 5 will be explained with reference to FIG. Here, it is assumed that both monitors have touch screen devices attached to the front surfaces thereof.

FIG. 2 is a screen configuration diagram of two display devices, each screen of CRT-1; CRT-2 being divided into three areas, A11, A12, A13; A21, A22, A23.

First, the display device CRT-1 will be explained.

Area A11 is a fixed display area and displays alarms for each system of the plant. This system-based alarm is aggregate information of individual alarms, and when any one or more of the individual alarms belonging to the system occurs, an alarm for the system is generated. Furthermore, as a method of expressing system alarms, for example, a block diagram format in which one system is represented by one block is used.

Area A12 is a variable display area, and is an area for displaying alarms in a given system in message format, or for displaying alarms in message format in the order in which they occur, regardless of the system.

Area A13 is the control area of the screen, and there are switches on the screen for checking and resetting alarms, moving the message display section forward or backward, and identifying whether the messages in the system are messages in the order in which they occurred, etc., which can be selected using the touch screen. It is configured so that screen information can be controlled depending on the situation.

Next, the display device CRT-2 will be explained.

Area A21 is a fixed display area that always displays the status of important system equipment of the plant and whether or not an important event has occurred. For example, in a BWR power plant, this applies to the status of the emergency core cooling system (ECCS system), reactor scram, main steam isolation valve, turbine, generator, etc. The display method is, for example, in the form of a block diagram in which each system, device, event, etc. is expressed as one block, and states such as operation/stop are identified using color codes.

Area A22 is a variable display area where you can select the display of piping and instrumentation diagrams for each system, auxiliary information for individual alarms (for example, alarm generation logic, input signal tag number, signal current value, limit value), etc. shall be displayed.

Area A23 is a control area of the screen and has the same function as area A13.

Next, the operation of this embodiment will be explained.

When no alarm is generated, each area of the display devices CRT-1 and CRT-2 displays the following information. That is, A11: The block diagram display of the system alarm is displayed in green, for example, to indicate that no alarm has occurred.

A12: There are no messages to display.

A21: The status of each block, for example, the stopped status is displayed in green.

A22: You can selectively display piping and instrumentation diagrams for each system (however, no alarms have occurred).

When an alarm is generated, each area of the display devices CRT-1 and CRT-2 displays the following information. That is, A11: The block part of the system to which the generated alarm belongs changes color to red, for example, to indicate that some kind of alarm has occurred. In this state, by touching the block part with your finger, the following information will be displayed in area A12 and area A22 via the touch screen.

A12: When a message within the system is selected in area A13, an alarm message within the system touched in area A11 is displayed. If the message in the order of occurrence is selected in area A13, the alarms that have occurred are displayed in chronological order regardless of the system in area A11. In either case, when the area is full, the forward and reverse functions of area A13 are used to control the display message.

A21: The status of each block is displayed regardless of the selection of area A11. For example, in the operating state, it is displayed in red.

A22: Display the piping and instrumentation diagram of the system selected in area A11. However, by touching each alarm message part with your finger in area A12, the area
A22 displays auxiliary information for the alarm.

A13: Confirms the generated alarm, performs reset control, etc.

Furthermore, the alarm processing by the plant operation support system of the present invention will be explained with reference to the flowchart of FIG.

First, when an alarm processing start command 10 is issued, plant data is input as a first step 11, and each plant data is converted into a digital value. In the second step 12, the digitized plant data is compared with a predetermined threshold value for each signal, and the state of the plant equipment is determined by determining the truth or falsity of the logical formula. In the third step 13, the second
If the result of the truth/false determination of the logical formula in step 12 is determined to be abnormal, the process is inputted to the fourth step 14. In this fourth step 14, it is determined whether or not to generate an alarm. That is, an alarm is generated if the input signal from the third step 13 is inactive or malfunctioning, and the alarm is suppressed if it is a secondary event or a duplicate event. And the next 5th step 1
If it is determined in step 5 that there is an alarm, the sixth step 16
Displays a warning. After displaying this alarm, the process returns to the first step and the same alarm processing procedure as described above is repeated. Note that if there is no occurrence of an abnormality and no occurrence alarm in the third step 13 and the fifth step 15, the process returns to the first step 11,
The same alarm processing procedure as already described is repeated.

Next, details of the alarm display in the sixth step will be explained with reference to the flowchart of FIG.
That is, when the alarm display request is output, in the area A21 of one display device CRT-2,
In the seventh step 17, the state of the block section is displayed. In the other display device CRT-1, in the eighth step 18, first, the alarm generation system block section is displayed in red in the area A11. Therefore, in the next ninth step 19, the operator selects a system by touching the block with his finger.

In the next 10th step 20, you select whether or not it is a systematic message, and if you select a systematic message, the
11 In step 21, a systematic message is displayed in area A12. Further, when the message in the order of occurrence is selected, the message in the order of time is displayed in the area A12 in the twelfth step 22. Then, the next 13th step 2
In step 3, message control is performed in area A13 based on the output signal from area A12, after which the process returns to ninth step 19 and message control is performed by repeating the same procedure as described above.

After the system selection in the ninth step 19, in the fourteenth step 24, it is selected whether or not there is auxiliary information in the area A12, and if it is auxiliary information, the alarm auxiliary information is sent in the area A22 in the 15th step 25. indicate. Also, if it is not auxiliary information, the area is
Display the piping and instrumentation diagram of the system on A22. Then, in the next 17th step 27, message control is performed in area A23 based on the output signal from area A22, and then the process returns to 14th step 24, where the same procedure as already explained is repeated and message control is performed. It is done.

[Effects of the Invention] As explained above, according to the plant operator support device of the present invention, when an abnormality occurs in the plant, the alarm identification device can discriminate only the alarms that are truly important for the safety of the plant. Furthermore, since these alarms are aggregated and displayed on a CRT display device, plant operators do not have to travel to check them, and it is easier to understand the status in the event of an abnormality. Therefore, the plant operator can perform response operations quickly and accurately.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.
2 is a screen configuration diagram of a display device used in the display control device of FIG. 1, FIG. 3 is a flowchart for explaining alarm processing by the plant operation support device of the present invention, and FIG. This is a flowchart for explaining the details of the alarm procedure. 1...Nuclear plant, 2...Signal input device,
3... Status determination device, 4... Alarm generating device, 5...
...Display control device.

Claims (1)

[Scope of Claims] 1. A plant operator support device that notifies a plant operator of abnormal conditions in a plant, including a signal input device that inputs a status signal from the plant, and a restriction on analog signals among the status signals. a status determination device that determines the status of the plant/equipment by comparing the digital signal with a logical expression that expresses the normal status of the equipment as a combination of logical variables, and determines a candidate for an alarm; an alarm identification device that identifies important alarms to be generated and alarms other than important alarms based on the causal relationship between events among the generated alarms selected by the state determination device;
A plant operator support device comprising: a display control device that displays and controls display content and display location in order to display only important warnings obtained from the warning identification device on a display device. 2. The plant operator support system according to claim 1, wherein the display control device is a display device equipped with a touch screen device so that the displayed alarm information can be obtained via the touch screen.