JPS6275718A - Accident supervisory device - Google Patents

Abstract

PURPOSE:To centralizedly provide an operator with information, by displaying the plant state, operating items, conforming items, and the time elapsed after an accident occurs as one displaying picture. CONSTITUTION:The accident occurring state of a plant is detected by comparing a previously fixed process quantity and the set value for discriminating accident of the process quantity with each other by means of an accident discriminating means 3. When a plant accident is detected in such a way, occurrence of the accident is informed to a time control means 4 and displaying means 6 and the time control means integrates the time elapsed after the occurrence of the accident and, at the same time, monitors whether or not each operating item and confirming item are executed by an operator. Simultaneously, the time control means discriminates a step advancing condition. The displaying means 6 displays information, such as the time elapsed, plant state, operating items necessary for restoring the plant from the accident, etc., upon receiving the information of the occurrence of accident.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an accident monitoring device in a power generation plant. [Technical Background of the Invention and Problems thereof] In recent years, automated plant operation has been widely carried out in power generation plants. As a result, under normal plant operating conditions, there are fewer operators than in the past. As a result, when an accident occurs in a plant, each operator can make more accurate judgments about the accident than before, and have more control options when responding to the accident.

The number of items to be checked has increased, and since indicators and indicator lamps are scattered on each control panel in the control room, the old work itself has become a heavy burden on operators in order to prevent accidents. Intensive plant status monitoring, so that recovery work can be carried out quickly after an accident occurs.
It is also necessary to provide instructions on operation items depending on the nature of the accident.

[Purpose of the invention]

The present invention detects the occurrence of an accident as an alternative to an operating procedure manual that summarizes restoration operation items and confirmation items for each accident type when an accident occurs in a plant, and also provides visual information to operators using a display device, chime, etc. By audibly announcing the occurrence of an accident and at the same time centrally displaying on the display the amount of processes that must be monitored until recovery after an accident, the operation items required for recovery, and the elapsed time since the accident occurred. This reduces the burden on operators of reading indicators and display lamps on control panels and grasping the plant status, allowing them to focus on recovery operations, enabling quick accident recovery responses, and Depending on the time that has elapsed since the accident, the operator is informed of the importance of the operation and the order of operation, which of the accident response operation items must be operated in an emergency, based on the operation instruction level. The aim is to keep the damage to a minimum without causing any negative impact.

[Summary of the invention]

The present invention detects the accident occurrence state of the plant by comparing the process 1, which is predetermined to determine the accident occurrence state of the plant, with the set value for accident determination of this process quantity by the accident determination means, and thereby detects the plant accident occurrence state. When this is detected, the time management means and display means are notified that an accident has occurred, and the time management means adds up the elapsed time since the accident occurred, and allows the operator to carry out each operation item and confirmation item. It monitors what has been done and determines the step progress status. Furthermore, the display means is characterized in that it displays information such as the elapsed time given to the operator by notification of the occurrence of the accident, the plant status, and operation items for recovery from the accident.

[Embodiments of the invention]

The present invention will be explained below using an illustrated embodiment. FIG. 1 is a configuration diagram of an accident monitoring device showing an embodiment of the present invention. 1 is a plant, 2 is an input means, 3 is an accident judgment means, 4 is a time management means, 5 is a step confirmation means, 6 is a display means, and 7 is an accident monitoring device comprising basic information for display.

The input means 2 receives analog process iAI such as temperature and pressure, flow rate, etc. as a plant status signal from the plant 1.
Digital process ID for opening/closing valves, pump operation, etc.
I is input and converted into a digital quantity that can be processed by each subsequent means. Further, the step confirmation signal PI from the step confirmation means 5 is also read in the input means 2 and subjected to the same processing as the plant status signal. The accident determination means 3 inputs a predetermined digital quantity I8 for accident determination necessary for determining the occurrence of an accident among the digital quantities, and compares this with a predetermined setting value for accident determination. By doing so, it is determined whether an accident has occurred or normal operation is in progress, and when it is determined that an accident has occurred, a time management means activation signal X and a display means activation signal X2 are outputted to the time management means 4 and display means 5, respectively. do.

The time management means 4 is activated by the time management means activation signal X, and integrates the elapsed accident time T into a time period determined for each accident.

In addition, since the optimum operation or confirmation time for each operation item or confirmation item is determined depending on the accident, by comparing this with the accident elapsed time T, the items to be instructed for the operator to operate or confirmation work are determined, If no operation or confirmation is performed even though the optimum time has passed, a step confirmation request signal OP is output to the step confirmation means 5. The step confirmation means 5 receives the step confirmation request signal O.
P causes a lamp flicker and a chime to sound in order to trick the operator's confirmation.

The display means 6 receives the display means activation signal X, reads information for each accident type from the display basic information 7 as display output basic information DO, and uses this information to input the display digital quantity ■0, time from the input means 2. Load the accident elapsed time T and display step information 8D from the management means 4C
Output to display such as RT.

Next, the internal processing of the accident determination means 3 is shown in Figures 2 and 3.
This will be explained using figures. FIG. 2 is a flowchart of the accident determination means 3. The accident determination means 3 reads all predetermined digital quantities Is for accident determination from the input means 2. Next, the state is determined for each digital quantity.
First, identify whether it is a digital process quantity or an analog process quantity, and if it is a digital process quantity, compare the digital quantity for accident judgment with the digital input accident judgment value LDS, and if the digital quantity and the accident judgment value are the same, it is an accident. If they are different, it is determined that the operating state is normal.

If it is an analog process quantity, digital i for accident judgment
By comparing I8 and the analog input state judgment value LAS, the analog input state VS is the same as the digital process amount.
This allows the analog process amount to be expressed as 0 or l. As with the digital process quantity, the analog input state vS and the analog input state accident judgment value LVS are compared, and if the process quantity and the accident judgment value are the same, it is determined that an accident has occurred, and if they are different, it is determined that the operating state is normal. .

The above judgment method is illustrated in Figure 3 (a) and (b).
).

The above describes a means for determining an accident state based on a single process quantity, but it is also possible to determine an accident state using a plurality of process quantities. FIG. 3(c) is a diagram illustrating judgment of an accident state based on a plurality of process variables. This is a diagram in which an accident is determined by two manual efforts of the analog process quantity state vS and the digital process S1, and it is determined that an accident has occurred when the analog process quantity state Vg=l and the digital process quantity S,=Q. To make a decision, VB and Sj
All you have to do is take the logical statement. Similarly, judgments can also be made using logical sums. As described above, when it is determined that an accident is occurring, the accident determining means 3 outputs as accident information X what kind of accident has occurred based on the digital quantity Is for accident determination to the time management means 4 and the display means 6.

Next, the internal processing of the time management means 4 will be explained using FIG. 4. FIG. 4 is a diagram showing each operation item and confirmation item by the time management means 4 in the form of a time chart. When an accident occurs in a plant, the operations and confirmation items that operators must perform in response to the accident are
determined by The state of these operation confirmation items is determined by this means among the following states.

■, Item 2 for which operation and confirmation have been completed, Item 3 for which it is time to perform an operation, Item 4 for which urgent operation is required, and Items other than the above.

In the above state, for items whose operation completion cannot be determined based on the amount of plasticity among the items for which it is time to perform the operation, the step confirmation means 5 flickers the lamp,
Since it is necessary to ring a chime to request confirmation from the operator and to determine that the operator has confirmed, a step confirmation request signal OP is output to the step confirmation means 5. The above judgment method is performed as follows.

Here, a method for determining the state will be explained using step 2P2.

In step 2P2, a step 2 operation standard time St and a step 2 operation limit time Lt are set. Here, the progress status of the step can be determined based on the accident elapsed time T and each set time being in the following state. T (St,
There is no need to rush to change the percentage when OT≧8t!
And T (Lt) indicates that the time to perform the operation has come. If T≧Lt, the time limit for performing the operation in step 2 has been exceeded, so an emergency operation is required. The determination result is used as step information SD for display on the display means 6.

Next, the internal processing of the display means 6 will be explained using FIG. FIG. 5 is an internal processing flowchart of the display means 6. The processing of this means is started by receiving a start signal from the accident determination means 3. For the first time, the bottom water means start signal X
The accident type X is extracted from , and the display output basic information DO corresponding to the current accident is read from the fire/water basic information 8 according to the accident type X. This information includes information such as process quantities used for display, operation confirmation items, and system diagrams used on the display screen.Based on this information, the display means 6 displays process quantities for display 0 and accident elapsed time T1. step information SD
Read and create display data. When creating this display data, step f, which has already been determined by the time management means 4,
7t@ causes the operation confirmation item to change color and flicker. Specifically, items for which the operation has already been completed are blue, items with a time limit for the operation (yellow), items that require urgent operation are yellow (7), and other items are marked 7. A display is displayed to inform the operator of the progress and what to do next.

Next, the double-sided display displayed by the 5 display means 6 will be explained using the display example shown in FIG. The time elapsed since the accident is displayed in the upper left corner of the screen, a message is displayed in the upper right corner to confirm the operations to be performed by the operator after the accident occurs, and the system diagram required when the generator is grounded is displayed in the lower part. A generator grounding fault is detected by the operation of 64 relays, which are ground fault overvoltage relays, and the status of the generator output, generator voltage, and generated current circuit breaker is read as display information and displayed on the system diagram. The operation confirmation items include the display output basic information DO internal pressure, which is displayed in different colors according to the display step information from the time management means 4.

〔Effect of the invention〕

The present invention enables operators to grasp the plant status at the time of a plant accident, confirm operation items necessary for recovery work after the accident, process volume necessary for plant monitoring during recovery work, and concentrate the time elapsed since the accident occurrence. Because it is displayed as
The work burden on the operator can be reduced, and the operator can quickly respond to accident recovery work.

[Brief explanation of drawings]

Fig. 1 is a block diagram of the accident monitoring device according to the present invention, Fig. 2 is a block diagram showing the internal processing of the accident judgment means, Fig. 3 is a diagram explaining process amount judgment, and Fig. 4 is the inside of the time management means. Processing flowchart, Figure 5 is a flowchart of internal processing of the display means, Figure 6 is a flowchart of internal processing of the display means.
The figure is a diagram showing an example of a display screen. l... Plant, 2... Input means, 3... Accident judgment means, 4... Time management means, 5... Step confirmation means, 6... Display means, 7... For display basic information. Figure 1 Figure 2 P (C) Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] An input means that reads the analog process quantities of the plant, digital process quantities, and step confirmation signals from the step confirmation means and converts them into digital quantities, and a comparison between predetermined process quantities for accident judgment and set values for accident judgment. an accident determination means for determining whether or not an accident is occurring in the plant; and a time management means activation signal from the accident determination means, which is activated by the time management means activation signal and includes confirmation items for integrating elapsed time since the accident occurrence and operation items since the accident occurrence. a time management means for outputting a step confirmation request signal to the step confirmation means for managing the step progress state and requesting the operator to confirm the step, and also for creating display step information read by the display means; , a step confirmation means for outputting a step confirmation signal in response to a step confirmation operation by an operator by sounding a lamp flicker and a chime for prompting an operator to confirm the steps using the step confirmation request signal; and a display from the accident determination means. It consists of a display means that is activated by a start signal and displays the elapsed time of the accident, operation items, confirmation items, step progress status, and plant status based on basic information, creates display data, and displays it on a CRT etc. An accident monitoring device characterized by displaying plant status, operation items, confirmation items, and elapsed time on a single display screen to provide intensive information to operators.