JPS6252612A - Diagnostic information display method - Google Patents

Abstract

PURPOSE:To decide appropriately the state of a plant under emergency and to take speedily a corresponding step by automatically selecting and displaying the screen number of a display device displaying information related to the causes of the abnormal plant. CONSTITUTION:When the causes of abnormalities is found after troubleshooting, an equipment developing abnormalities, a process parameter regarding said equipment and a plant system to which said equipment belongs are made clear. Accordingly a CRT screen selecting table 7 is referred from said information to obtain the CRT screen number related to the causes of abnormalities. Then said regarding CRT screen number is registered on a CRT screen display request table 8. Its contents are referred in the real time, and the requested screen is automatically displayed on the prescribed CRT display device.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a diagnostic information display method for automatically selecting an information providing screen based on the diagnosis result of an abnormal situation occurring in a plant.

[Technical background of the invention and its problems] For example, in large-scale plants such as nuclear power plants, it is especially necessary to detect failures early and take appropriate operational actions to prevent them from developing into major accidents.

By the way, in conventional instrumentation and control systems, when it is determined that the plant condition has deviated from the safe operation range 1, that is, the alarm level, an alarm is issued to call the attention of plant operators, and a transient deviation occurs and a scram occurs. If this level is exceeded, the plant will be brought to an emergency shutdown to ensure plant safety.

However, in the conventional instrumentation and control systems, even if a small-scale failure occurs in the equipment that makes up the plant, it cannot be detected unless the operational status of the nuclear couple exceeds the alarm level due to its influence. In general, it is difficult to prevent the propagation and expansion of failures, which may easily lead to an emergency shutdown of the plant and reduce the operating rate of the plant.

In order to solve these problems, various abnormality diagnosis methods have been developed and are being implemented as abnormality diagnosis systems. The diagnosis results from such an abnormality diagnosis system are
It is usually displayed on a CRT display device or the like and provided to plant operators.

However, conventional display methods mainly display messages such as the cause of abnormalities in the plant, and are not necessarily convenient for users of plant operation ports. In other words, when an abnormality occurs in a plant, many plant operators collect related information such as the location of the abnormality, the identification of the cause, and the operating status of Prohis value 1 equipment, and decide on the corresponding operation operations. However, it was not always possible to obtain adequate results using this method.

[Object of the Invention] The present invention has been made in view of the above-mentioned circumstances, and its object is to provide a diagnostic information display method that appropriately and timely displays diagnostic information at the time of plant abnormality.

[Summary of the Invention] In order to achieve the above object, the present invention, when the cause is found as a result of the abnormality cause diagnosis of Plan 1-, displays the screen number of the display device displaying information related to the cause. The present invention relates to a diagnostic information display method in which an information display screen related to the cause is automatically provided by automatically selecting the screen number and registering this screen number in a screen request table.

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

FIG. 1 is a flow chart of one embodiment of the present invention.

In response to a command to start diagnosis, data of the plant process to be diagnosed is input in the first step 1, and in the next second step 2, it is determined whether or not there is an abnormality, and if there is an abnormality, a cause diagnosis is executed.

Many methods are known for diagnosing the cause of an abnormality, and for example, a method using a model that expresses the causal relationship of events within a plant caused by an abnormal event in the form of a logical tree is famous.

This method assumes various abnormalities that occur in the plant, expresses the event sequence when each abnormality occurs using logic gates such as AND and OR, and compares it with the event sequence that occurred in the plant. The cause of the abnormality is identified by searching for matches.

In the next third step 3, if the cause of the abnormality is not found as a result of the cause diagnosis, input of plant data is continued.

On the other hand, if the cause of the abnormality is found, the equipment that caused the failure, the process parameters related to the equipment, and the plant system to which the equipment belongs are clarified in the fourth step 4. From this information, the CR7 screen is displayed. Refer to the selection table 7 to obtain the CRT screen number related to the cause of the abnormality.

FIG. 2 shows the structure of the CR7 screen number selection table 7. Of course, the plant system code indicates the abbreviated name of the system, and for example, in the case of a nuclear power plant, the water supply system is expressed as FW. The component equipment code is the name of equipment that makes up the system, and includes a wide variety of equipment such as pumps and valves. Component codes are written together for each system in consideration of table search efficiency. The process parameter code is a parameter name related to a component, for example, in the case of a pump, SUCTION FLOW>, discharge flow.

There are seal water flow rate, lubricating oil pressure, etc.

The related CRT screen number in the rightmost column is the number of the CRT screen that appropriately contains information related to the above-mentioned plant system code, component equipment code, and process parameter code.The screen contents include a process block diagram including the component equipment, and a process Parameter trend diagrams, etc. can be specified as appropriate.

The method of referring to the CRT screen selection table is, for example, as a result of abnormality cause diagnosis, when water supply pump A of the water supply system (FW) is selected.
(FW PUMP A) Suction collapse (SUCTIO
If it is determined that there is an abnormality in the CRT screen with screen number 120, the CRT screen with screen number 120 will be automatically selected.

In the next fifth step, the related CRT screen number is registered in the CRT screen display request table 8.

FIG. 3 shows the structure of this CRT screen display request table 8. The CRT device number in the left column is the CR that can be displayed.
This is the identification number of the T display device, and the current display screen number is the number of the screen currently displayed on the device. The requested display screen number is the related CRT screen number selected from the CR7 screen selection table 7, and the display request table is updated only when it is different from the current display screen number.

That is, if the requested screen number is the same as the currently displayed screen number, the contents of the display request table are not updated.

Then, in the sixth step 6, the contents of the CRT screen display request table 8 are referenced in real time, and the requested screen is set to a predetermined CR.
automatically displayed on the T display device. For example, in Fig. 3, screen #108 is currently displayed on CRT device #3, and when a new screen display request for #120 occurs, the current display screen number becomes 120, the requested screen number is cleared, and a new screen is displayed. #12 for CRT device #3
Automatically displays the CRT screen of 0.

[Effects of the Invention] As explained above, according to the diagnostic information display method of the present invention, when an abnormality occurs in a plant, an operator can automatically obtain a series of information related to abnormality diagnosis, such as the cause of the failure. It becomes possible to judge the state of a plant emergency and decide on response operations more accurately and quickly than ever before.

[Brief explanation of drawings]

FIG. 1 shows a flowchart 1-1 2 of an embodiment of the present invention.
This figure is a diagram showing the structure of the CRT screen number selection table shown in FIG. 1, and FIG. 3 is a diagram showing the structure of the CRT screen display request table shown in FIG. 7...CRT screen number selection table 8...CRT screen display request table (8733) Agent Patent attorney Yoshiaki Inomata (and 1 others)
Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] In a diagnostic information display method that diagnoses an abnormal event that occurs in a plant and displays the cause of the abnormality based on the diagnosis result, a display screen number is automatically selected according to the diagnosis result, and this screen number is assigned to a screen request table. A method for displaying diagnostic information, characterized in that an information display screen related to the cause of the abnormality is automatically provided by registering the cause of the abnormality.