JPH07167980A - Plant monitor - Google Patents

Abstract

PURPOSE:To prevent information from being too much or too little and enable an operator to always display information processing capacity with an appropriate feeling of tension so as to further heighten the safety and reliability of a plant by evaluating the appropriate quantity and quality of information for the operator, and distributing the information according to the operators to be provided with the information. CONSTITUTION:A plant monitor has plant state judging devices 5-8 for taking in signals 1d-4d on equipments or systems measured in one or more nuclear power plants 1-4 so as to judge individual plant states, a significance determining device 9 for taking in these state judgment results so as to determine the significance to plant operation, an information supply form evaluating device 10 for putting plant information, including the plant state judgment results, into the quantity and form to enable operators to deal with, an information distributing device 11 for selecting the supply destination according to the supply information contents, and information supply devices 12, 13 for providing the operators with the supply information.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, when operating and controlling one or a plurality of plants, always provides an appropriate amount and content information based on the determination result of the operating state of the plant regardless of the operating state. Accordingly, the present invention relates to a plant monitoring device that contributes to reducing the burden on an operator of grasping a plant state and determining a corresponding operation, and further capable of monitoring and controlling a plurality of plants with a small number of people.

[0002]

2. Description of the Related Art Generally, a process plant such as a power plant or a chemical plant is a huge system,
It consists of a huge number of devices and systems. In these plants, the occurrence of abnormalities is, in principle, prevented from spreading by taking appropriate countermeasures detected by an alarm. For this reason, measures to be taken when an alarm is issued and possible causes are summarized in a procedure manual and operated by operators. Furthermore, with the recent development of computer technology and information processing technology, various driving support systems have been developed, such as estimating the cause of abnormalities and assisting in deriving countermeasures.

[0003]

However, if these operation support systems are installed in the control panel of the current operation plant as they are, the information supporting the operator is provided while the entire amount of information to be processed by the operator is provided. As a result, it tends to increase. Therefore, from the operator's point of view, it is necessary to make appropriate adjustments in terms of both the quality and the amount of information, and in the future, when trying to monitor and control a plurality of plants with a small number of operators, it will be a big problem.

Therefore, the present invention has been made in consideration of such circumstances, and its purpose is to determine an abnormal state that has occurred in one or a plurality of plants and determine what those plant states are in operation. Decide whether it is important, and use the results to evaluate the appropriate amount and quality of information for operators, and distribute it according to the operators to whom the information is to be provided, so that excess or underage of information can be avoided. It is an object of the present invention to provide a plant monitoring device capable of further improving the safety and reliability of a plant by preventing the operator from always exerting an appropriate sense of tension and information processing ability.

[0005]

In order to achieve the above object, the present invention is configured as follows.

The invention according to claim 1 of the present application (hereinafter, referred to as the first
Invention), a plant state determination device that determines the individual plant state by taking in the signals related to the equipment or system measured in one or more plants, and the importance of the plant state determination result for the plant operation. An importance determining device for determining, an information providing form evaluation device that summarizes plant information including a plant state determination result into an amount and a form that an operator can process, an information distributing device that selects a providing destination according to the provided information content, and these An information providing device for providing provided information to an operator.

The invention according to claim 2 of the present application (hereinafter referred to as the second invention) is based on
It is characterized by having means for determining an abnormal state by combining plant parameters at each level of equipment, system, function, and operation target, and for weighting each information by using the deviation from the normal value.

Further, in the invention according to claim 3 of the present application (hereinafter, referred to as the third invention), the importance degree determining device determines the determination result and the determination result of the plant states of all the plants from the plant state determining device. Using the associated weights,
It is characterized by having means for calculating the importance of the status message for each plant.

Furthermore, in the invention according to claim 4 of the present application (hereinafter, referred to as a fourth invention), the information form evaluation device is
It is characterized in that it has means for determining an information providing form such as a tone color, a message or an image as a form for providing the plant state determination result and calculating an amount of information to be provided to the operator.

In the invention according to claim 5 of the present application (hereinafter referred to as the fifth invention), the information distribution device selects an appropriate information providing device for each form of the provided information, and the information for each plant. It is characterized in that it has means for deciding the priority from the provided amount and the weight and allocating it to the information providing device.

[0011]

[Operation] Since the plant operator can always receive the information of appropriate amount and contents regardless of the change of abnormal condition, it becomes possible to take more accurate judgment and corrective action, and the safety of the plant is improved. In addition to further improving reliability, it becomes possible to operate multiple plants with a small number of people.

[0012]

Embodiments of the present invention will be described below with reference to FIGS.

FIG. 1 is a block diagram showing the overall configuration of an embodiment in which the present invention is applied to four nuclear power plants. In the figure, the plant monitoring device is, for example, four nuclear power plants. The nuclear power plants 1 to 4 have plants 1, 2, 3, and 4 and are equipped with measuring devices for the devices and systems (not shown) that make up the plants. From these measuring devices, for example, the reactor water level, pressure, etc. , Plant information 1d, 2d, 3d, 4d such as machine acoustics or video images is output and given to each plant state determination device 5, 6, 7, 8.

Each of the plant state judging devices 5 to 8 includes an importance determining device 9, an information providing form evaluating device 10, and an information distributing device 1.
One and a plurality of information providing devices 12 and 13 are sequentially connected.

As shown in FIG. 2, for example, each of the plant state judging devices 5 to 8 judges the plant state from the plant parameters in the plant information 1d to 4d by referring to the contents of the state judgment important for the operation of the nuclear power plant. For example, in FIG. 2, the plant state is hierarchically divided into device level information, system level information, higher function level information, and information up to the operation target. . The state of each device is judged from the power supply, the flow rate, the valve opening, etc. by the logic prepared in advance, and they are combined into the system level information, and the system level is further summarized to judge the function level. Ultimately, the plant operation target is determined from the functional state. Depending on the state of the plant, the operation target changes to steady operation if normal, continuous output reduction if there is a slight abnormality, and operation stop if the abnormality expands.

Here, as shown in FIG. 2, the weight of information for each layer is, for example, 5 for a target and 3 for a function.
2 is attached to the system and 1 is attached to the device. Further, importance is classified and weighted for each item in each layer. Although this weight is treated as a constant value, it can be changed by changing the observation parameter from the limit value.

As the plant abnormality progresses, the abnormal state determination result of FIG. 2 gradually spreads from equipment to system and equipment level. On the other hand, the amount of information decreases as it goes to the system level and the function level, but the content is more concentrated and covers a wide range of information on the plant. The equipment level is judged by comparing the input point with the threshold value set for each input point, but the lower level information such as and or or is used to judge the system level, function level, and operation target. It is done by combining with logic.

As shown in FIG. 3, the process flow of the plant parameters in the plant state judging devices 5 to 8 judges the system, the plant function and the operation target stepwise from the equipment state. For example, even if the device status is normal, there is a possibility that there is no input information or the input information cannot be input correctly. Since these processings are performed independently and in parallel for each unit, the processing content of FIG. 3 is similar in each unit.

Then, each plant state judging device 5-8
Gives the state determination results 5d, 6d, 7d, 8d for each plant, which consist of equipment or system level information, to the importance degree determination device 9, where the operation information of all plants is summarized. The importance determining device 9 uses the importance index indicating the plant state defined in FIG. 2 to rank the information of each plant according to its quality as shown in FIG. Here, the importance index is the weight for each layer multiplied by the weight within each layer.

In FIG. 4, for example, the units # 1 and 4 (nuclear power plant first and fourth) are operating normally, and the unit # 2 (second) has a reactivity abnormality accident, and the unit #
No. 3 (No. 3) indicates that there is an abnormality in a part of the safety system and the output is decreasing. As a matter of course, the amount of information provided by the abnormal unit # 2 is large. FIG. 5 shows a flow of processing for calculating importance in the importance determining device 9.

Next, the operation information 9d of all the plants ranked as shown in FIG.
Sent to. The information providing state evaluation device 10 performs the processing shown in FIG. 7, and the providing form is classified into a message, a trend graph, a voice, a drawing, etc. according to the content of the information 9d from the importance degree determining device 9, and these information are obtained. The amount of information is evaluated for each provision form to determine the amount of provision of the entire provision information.

FIG. 6 is an evaluation of the provision form and the amount of provision for each information content, and shows, for example, continuation of normal operation regarding unit # 1 and reactor reactivity control regarding unit # 2 from the information in FIG. On the other hand, in the right column, in addition to the plant state determination result, parameter information related to each that is useful for the plant state determination is included, and the provision form and the coefficient for evaluating the provision amount are both shown. Since the message must be read, the coefficient of the provided amount is evaluated relatively higher than the graph and voice. These are determined for all the information that can be provided in advance, and stored in a database.

Then, the plant information 10d whose information provision form and quantity have been evaluated by the information provision form evaluation device 10 is sent to the information distribution device 11, where the processing shown in FIG. It is transmitted as plant information 12d, 13d to the information providing devices 12, 13 placed in the. The installation location may be, for example, a shift supervisor who supervises the operation or a technical support organization which performs a comprehensive safety evaluation of the plant.

On the other hand, the plant information 12d, 13d is, depending on the plant state, that is, the size of the abnormality or accident, for example, as shown in FIG.
Normal and minor abnormalities such as 1, # 3 and # 4 are compressed into plant data and displayed on one CRT, and the operating status of unit # 2 where a major abnormality has occurred is 3 CRs.
Displayed on T.

Since the unit information during normal operation becomes too large when the trend such as reactor water level is reached, only the operation target message is selected from the importance evaluation results shown in FIG. In this case, the limit of the amount of information displayed on the CRT is set in advance, but it can be automatically changed according to changes in operators or events.

Further, in order to determine the limit of the amount of information, it is necessary to actually simulate an abnormal event using a plant simulator and set an appropriate numerical value. Further, the weighting coefficient or the coefficient indicating the amount of information can be predetermined,
It is also necessary to review through evaluation using a simulator. FIG. 9 shows a situation in which a new abnormality has occurred in the unit # 3 and the plant is in a stopped state, and the information of the unit # 3 is provided instead of the lower information about the unit # 2.

FIG. 11 is a flow chart showing the overall processing flow of the plant monitoring device configured as described above. The plant state judging devices 5 to 8, the importance determining device 9, and the information providing described above. Morphological evaluation device 1
0, the processing contents of the information distribution device 11 are sequentially shown.

In the above embodiment, an example in which the present invention is applied to a nuclear power plant of 4 units has been described, but the present invention can also be applied to 1 unit or 4 units or more. According to this, even with one unit, the amount of information provision increases as the abnormality expands,
By selecting the upper information of the hierarchy shown in FIG. 4, it is possible to prevent the burden on the operator who provides excessive information from increasing.

[0029]

As described above, according to the present invention,
Regardless of changes in operating conditions including abnormal conditions of the plant,
Since the operator is always provided with the appropriate amount and content of information,
Operators can calmly and accurately carry out state determination and response operations, and a small number of operators can operate multiple plants.In addition to further improving the reliability of plant operation, However, it greatly contributes to the realization of efficient operation management.

[Brief description of drawings]

FIG. 1 is a system diagram showing a configuration of an embodiment when a plant monitoring device according to the present invention is applied to four nuclear power plants.

FIG. 2 is a diagram showing a hierarchy of plant information classified by importance.

FIG. 3 is a flowchart showing the processing contents of the plant state determination device.

FIG. 4 is a diagram showing an example of plant information selected and weighted for each unit.

FIG. 5 is a flowchart showing the processing contents of the importance determination device.

FIG. 6 is a diagram showing an example showing a provision form and amount thereof for each plant information.

FIG. 7 is a flowchart showing the processing contents of the information provision form evaluation device.

FIG. 8 is a diagram showing a display example when the plant information of four units is provided on four CRTs.

FIG. 9 is a diagram showing a display example when a plant abnormality further develops as compared with the case of FIG. 8;

FIG. 10 is a flowchart showing the processing contents of the information distribution device.

FIG. 11 is a flowchart showing the flow of the entire processing process of an embodiment of the plant monitoring apparatus according to the present invention.

[Explanation of symbols]

 1, 2, 3, 4 Nuclear power plant 5, 6, 7, 8 Plant state determination device 9 Importance determination device 10 Information provision form evaluation device 11 Information distribution device 12, 13 Information provision device

Claims (5)

[Claims] 1. A plant state judging device for determining signals of equipment or systems measured in one or more plants and determining individual plant states, and determining the degree of importance for plant operation by incorporating these plant state determination results. Importance determining device, an information providing form evaluating device that collects plant information including a plant state determination result into an amount and a form that can be processed by an operator, an information distributing device that selects a providing destination according to the provided information content, and provision of these A plant monitoring device, comprising: an information providing device for providing information to an operator. 2. A plant state judging device judges an abnormal state by combining plant parameters at each level of equipment, system, function and operation target, and weights each information by using a deviation from a normal value. 2. The plant monitoring device according to claim 1, further comprising means for performing the operation. 3. The importance degree determining apparatus has means for calculating the importance degree of the status message for each plant by using the determination result of the plant states of all the plants from the plant state determining apparatus and the weight attached to the determination result. The plant monitoring device according to claim 1 or 2, further comprising: 4. The information form evaluating device has means for determining an information providing form such as a tone color, a message or an image as a form for providing a plant state determination result, and calculating an amount of information to be provided to an operator. The plant monitoring device according to any one of claims 1 to 3, characterized in that. 5. The information distribution device comprises means for selecting an appropriate information providing device for each form of provided information, determining priority based on the amount and weight of information provided for each plant, and allocating to the information providing device. The plant monitoring device according to any one of claims 1 to 4, wherein the plant monitoring device comprises: