JP2021111214A - Plant monitoring system and plant monitoring method - Google Patents

Abstract

To provide a plant monitoring system and a plant monitoring method that are capable of increasing the number of monitoring models which can be simultaneously monitored and the number of combinations of sensors, without changing throughput of a monitoring system.SOLUTION: A management server 43 of a model monitoring device 40, when having received instructions to create a monitoring model from clients 44 to 45, creates a monitoring model indicating the relationship, in a plurality of sensor groups formed by grouping sensors by equipment and system, between sensors of the main sensor group directly associated with an equipment system to be monitored and sensors of groups other than the main sensor group, so as to perform monitoring. Since the relationship between all sensors is not monitored, the number of combinations of monitoring sensors can be decreased while the number of models which can be simultaneously monitored can be increased.SELECTED DRAWING: Figure 1

Description

The present invention relates to a plant monitoring system and a plant monitoring method for monitoring various plants such as a power plant.

In the power plant of a power plant, various devices such as steam turbines and boilers and systems such as air supply / exhaust systems (referred to as "equipment systems") are used. The power plant uses these equipment systems to generate electricity. In such a power plant, for example, a system applying SIAT technology (System Invariant Analysis Technology) is used to monitor the signs of failure of the equipment and systems installed in each equipment system of the plant (for example). , Patent Document 1). According to this monitoring system, the measured values from various sensors installed in each equipment system of the plant are used as follows.

The monitoring system examines relationships (also called invariant relationships, invariants) such as correlations between sensors based on the values measured from various sensors when the plant is operating normally. The monitoring system then creates a monitoring model that represents the strength of the relationships between the sensors for the entire plant, for each equipment system, or for each condition (inspection, start-up, rated operation, periodic test, outage, etc.). create. After that, the monitoring system monitors the relationship between the sensors based on the predicted value of the sensor based on the monitoring model and the measured value acquired periodically, and if there is a collapse (change) in the relationship, it monitors. The system notifies an alarm.

In the conventional monitoring system using the technology of Patent Document 1, a plurality of monitoring models such as a monitoring model for the entire plant and a monitoring model for each equipment system are operated at the same time to monitor the entire plant and important equipment systems. ..

JP-A-2017-021702

However, when monitoring a plurality of monitoring models at the same time, the processing capacity of the monitoring system limits the number of monitoring models and the number of combinations of sensors. For example, in a conventional monitoring system using the technology of Patent Document 1, the number of models that can be monitored at the same time is several tens, and the number of combinations of sensors is hundreds of thousands. In the monitoring model of a plant in which a large number of sensors are installed, such as a nuclear power plant, the number of combinations of sensors quickly reaches the upper limit, and the desired number of models cannot be secured.

In order to solve the above problems, the present invention provides a plant monitoring system and a plant monitoring method capable of increasing the number of monitoring models and the number of sensor combinations that can be monitored at the same time without changing the processing capacity of the monitoring system. The purpose is to do.

In order to solve the above problems, the invention according to claim 1 is a monitoring model in which sensors are provided in a device or system to be monitored, and the relationship between the sensors when the device system is normal is expressed. It is equipped with a model creation means for creating a model, detects a change in the relationship between the sensors based on the monitoring model for the actual device system, and outputs the change when the change in the relationship is detected. In the plant monitoring system, the model creation means includes a sensor in a main sensor group directly related to a device system to be monitored and a sensor in the main sensor group among a plurality of sensor groups in which the sensors are grouped for each device system. It is a plant monitoring system characterized by creating a monitoring model that shows the relationship with sensors other than the group.

The invention according to claim 2 is the plant monitoring system according to claim 1, wherein when there are a plurality of sensors in the main sensor group, the model-creating means determines the relationship between the plurality of sensors. It is characterized in that the monitoring model including the above is created.

The invention according to claim 3 is the plant monitoring system according to claim 2, wherein an index representing the sensor is displayed at a position where the sensor is provided on a schematic diagram of the equipment system, and the above-mentioned invention is described. It is characterized by comprising a display control means for expressing the relationship between the sensor in the main sensor group and the sensor other than the main sensor group and the relationship between the sensors in the main sensor group by a line connecting the indexes. And.

In the invention according to claim 4, sensors are provided in a device or system to be monitored, a monitoring model showing the relationship between each sensor when the device system is normal is created, and the device in actual operation. Regarding the system, in a plant monitoring method that detects a change in the relationship between the sensors based on the monitoring model and outputs the change when the change in the relationship is detected, the sensor is used for each device system. It is characterized by creating a monitoring model that shows the relationship between the sensors in the main sensor group that are directly related to the device system to be monitored and the sensors other than the main sensor group among the plurality of grouped sensor groups. This is the plant monitoring method.

According to the first and fourth aspects of the invention, among the plurality of sensor groups in which the sensors are grouped for each device system, the sensors in the main sensor group directly related to the device system to be monitored and the main sensor. Since a monitoring model showing the relationship with the sensor other than the sensor group is created, the relationship between the sensors other than the main sensor group is not monitored. Therefore, compared to the conventional monitoring system in which the relationships between a large number of sensors are brute-forced and monitored, the number of sensor combinations is significantly reduced, so that the processing load of the monitoring system is reduced and monitoring is possible at the same time. It is possible to increase the number of models. Further, since the sensors directly related to the device system to be monitored are always investigated and monitored as the main sensor group, the monitoring accuracy does not significantly decrease even if the number of combinations of the sensors to be monitored decreases.

According to the invention of claim 2, when there are a plurality of sensors in the main sensor group, a monitoring model including the relationship between the plurality of sensors is created, so that the number of combinations of sensors to be monitored is reduced. However, the monitoring accuracy does not decrease significantly.

According to the invention of claim 3, an index representing the sensor is displayed at a position where the sensor is provided on the schematic diagram of the device system, and the sensor in the main sensor group and the sensor other than the main sensor group are displayed. Since the relationship and the relationship between the sensors in the main sensor group are represented by the line connecting the indicators, the relationship between the sensors monitored by the monitoring model can be visually grasped. The monitoring status can be easily and quickly understood.

It is a block diagram which shows the plant monitoring system by one Embodiment of this invention. It is a table which shows an example of the measurement data. It is a table which shows an example of the sensor data. It is explanatory drawing which shows the structure of the model creation screen. It is explanatory drawing which shows the structure of the sensor selection screen. It is explanatory drawing which shows the model creation screen at the time of selecting the main sensor group. It is a graph which shows an example of the sensor data. It is explanatory drawing explaining the extraction of the strength of the relationship of a sensor. It is explanatory drawing which shows the monitoring screen of the monitoring model which monitors a reactor auxiliary cooling system. It is explanatory drawing which showed only the relationship of the sensor in the main sensor group from the monitoring screen of FIG. It is explanatory drawing which shows the monitoring screen of the monitoring model which monitors a turbine auxiliary cooling system. It is explanatory drawing which shows the monitoring screen of the monitoring model which monitors the main steam measurement system. It is a flowchart which shows an example of a monitoring process.

Hereinafter, the present invention will be described based on the illustrated embodiment.

1 to 13 show a plant monitoring system according to this embodiment, and FIG. 1 is a schematic configuration diagram showing a configuration of the plant monitoring system. This plant monitoring system is used in a power plant in which a power generation plant 10 is installed, and mainly includes a sensor monitoring device 20, an in-house communication network 30, and a model monitoring device 40.

The power plant 10 is, for example, a nuclear power plant, and although not shown, it is provided with a large number of devices and systems such as a nuclear reactor, a turbine, a generator, a pump, and a pipe. The power plant 10 uses these equipment systems to generate electricity. In the power plant 10, various sensors are installed in the power plant 10 in order to check the state of each equipment system, although the illustration is also omitted. Each sensor sends the measured values sg1 to sgN of the device system to the sensor monitoring device 20.

The sensor monitoring device 20 receives the measured values sg1 to sgN from the sensors installed in the power plant 10. When the sensor monitoring device 20 receives the measured values sg1 to sgN from each sensor, the sensor monitoring device 20 creates the measurement data 21 as shown in FIG. In the measurement data 21, the "measured value", "measurement date and time", and the like of the sensor are recorded corresponding to the "measurement item ID" for representing the sensor and identifying the sensor.

The sensor monitoring device 20 transmits the created measurement data 21 to the model monitoring device 40 via the in-house communication network 30 every time a predetermined time elapses. The predetermined time is set in the sensor monitoring device 20 as needed, such as in seconds, minutes, hours, and days.

When the model monitoring device 40 receives the measurement data 21 from the sensor monitoring device 20 via the in-house communication network 30, the model monitoring device 40 monitors the power generation plant 10 using the received measurement data 21. For this purpose, the model monitoring device 40 includes a communication control unit 41, a data server 42, a management server 43, and clients 44 to 45. The communication control units 41 to 45 of the model monitoring device 40 are connected so that data can be transmitted and received.

The communication control unit 41 performs communication control for connecting the data server 42 to the client 45 to the in-house communication network 30. For example, when the communication control unit 41 receives the measurement data 21 from the sensor monitoring device 20 via the in-house communication network 30, the communication control unit 41 sends the measurement data 21 to the data server 42.

The data server 42 is a storage device that stores data related to the power plant 10. For example, when the data server 42 receives the measurement data 21 from the sensor monitoring device 20 via the in-house communication network 30 and the communication control unit 41, the data server 42 stores the measurement data 21. When the data server 42 receives the data transmission request from the management server 43, the data server 42 extracts the corresponding measurement data 21 and sends it to the management server 43.

Further, the data server 42 stores sensor data 421 related to a large number of sensors installed in the power plant 10 (see FIG. 3). In the sensor data 421, the "measurement item ID", the "measurement item name", the "data collecting device", and the "facility name" are stored in association with each other. The measurement item ID is identification information of the item measured by the sensor. The measurement item name is information indicating the name of the measurement item and the type of sensor, product type, and the like. The data collection device indicates the type of device (for example, a programming console) that acquires the measured value of the sensor. The "facility name" represents the name of the plant where the sensor is installed.

Sensors are grouped into a plurality of sensor groups for each device or system. The sensor group to which each sensor belongs is represented by the measurement item ID. For example, in the measurement item ID "RCW-TEMP-B070" of the uppermost sensor in FIG. 3, the first abbreviation represents the sensor group, the next abbreviation represents the measurement contents such as temperature and flow rate, and the last abbreviation. Represents the sensor number in the sensor group. Therefore, from the illustrated sensor data 421, for example, four sensors belonging to the sensor group “RCW” and three sensors belonging to the “RSW” can be confirmed.

Further, when the data server 42 receives the measurement data 21 from the sensor monitoring device 20 via the in-house communication network 30 and the communication control unit 41, the data server 42 stores the measurement data 21. When the data server 42 receives the data transmission request from the management server 43, the data server 42 extracts the corresponding measurement data 21 and sends it to the management server 43.

Clients 44 to 45 are computers for operating the power plant 10 operated by a person in charge of operating the power plant 10. Various instructions and the like required for the operation of the power plant 10 are input to the clients 44 to 45 by the person in charge. For example, in order to create a monitoring model for the power plant 10, clients 44 to 45 are input with model creation instructions. When the model creation instruction is input, the clients 44 to 45 send the model creation instruction to the management server 43.

Further, when the clients 44 to 45 receive various data from the management server 43, for example, an alarm described later, the clients 44 to 45 display the alarm and the like. Further, when the clients 44 to 45 receive the above-mentioned sensor data 421 from the management server 43, the clients 44 to 45 display this data.

The management server 43 is a computer that performs various processes for monitoring the power plant 10. First, the management server 43 functions as a model creating means for creating each monitoring model of the power plant 10 and a marking control means for displaying the monitoring status by the monitoring model on the clients 44 to 45. Next, the management server 43 monitors the power plant 10 based on the created models. Hereinafter, the creation of the power plant 10 monitoring model by the management server 43 and the monitoring of the power plant 10 by the monitoring model will be described in order.

When a model creation instruction is transmitted from the clients 44 to 45 to the management server 43, the management server 43 starts a model creation task (not shown), which is a task program for creating a monitoring model. This model activation task executes the sensor selection process and the relationship extraction process.

In the sensor selection process, the management server 43 displays the model creation screen S1 shown in FIG. 4 on the clients 44 to 45. On this model creation screen Sc1, a creation menu Sc11 for switching various functions for creating a monitoring model, a selection button Sc12 for selecting a measurement item (sensor) to be monitored by the monitoring model, and a list of selected sensors. A sensor list Sc13 to be displayed and a focus group button Sc14 for selecting a sensor group (hereinafter referred to as a main sensor group) directly related to the device system to be monitored from the sensor list Sc13 are provided.

When the selection button Sc12 is operated, the sensor selection screen Sc2 shown in FIG. 5 is displayed on the clients 44 to 45. On the sensor selection screen Sc2, the candidate list Sc21 is displayed on the lower left side, the search unit Sc22 is displayed on the upper left side, and the selected list Sc23 is displayed on the right side.

The candidate list Sc21 at the lower left side is a display unit on which selectable sensors are displayed in a list. In this candidate list, the contents of the sensor data 421 read from the data server 42 are displayed.

The search unit Sc22 is an operation unit for searching and narrowing down the sensors displayed in the candidate list Sc21 based on the group name, the measurement item ID, the measurement item name, and the like. By performing a search with the search unit Sc22, only the sensors narrowed down by the search are displayed in a list in the candidate list Sc21.

The selected list Sc23 on the right side is a display unit in which the sensors selected from the candidate list Sc21 are displayed in a list. The addition of the sensor to the selected list Sc23 is performed by operating the addition button Sc24 arranged near the center in a state where the sensor is selected and highlighted in the candidate list Sc21 on the left side. By this additional operation, the added sensors are displayed in a list in the selected list Sc23 on the right side.

When the selection button Sc25 at the lower right side of the sensor selection screen Sc2 is operated, the model creation screen Sc1 shown in FIG. 6 is displayed again. On the model creation screen Sc1 after selecting this sensor, the sensors selected on the sensor selection screen Sc2 are displayed in a list on the sensor list Sc13.

When the focus group button Sc14 is operated on the model creation screen Sc1, a group list Sc15 representing a sensor group that can be selected downward from the focus group button Sc14 is displayed. That is, in this group list Sc15, only the sensor group to which the sensor selected on the sensor selection screen Sc2 belongs is displayed. When a sensor group is selected from this group list Sc15, the selected sensor group becomes the main sensor group. That is, a sensor having the same measurement item ID as the selected sensor group is selected as the main sensor group.

A registration button (not shown) is displayed on the model creation screen Sc1 after the main sensor group is selected. By operating this registration button, monitoring model creation information regarding the sensor selected on the model creation screen Sc1 and the main sensor group is transmitted from the clients 44 to 45 to the management server 43.

In the group list Sc15, a list is displayed so that "no setting" selected when the main sensor group is not set and "all item groups" in which all sensor groups are set as the main sensor group can also be selected. Will be done. Therefore, for example, if all the sensors are selected on the sensor selection screen Sc2 and "no setting" is selected from the group list Sc15, the relationships between all the sensors are brute-forced and monitored for the entire power plant 10. It is possible to do.

When the management server 43 receives the monitoring model creation information from the clients 44 to 45, the management server 43 executes the relationship extraction process. In this relationship extraction process, the management server 43 requests the data server 42 to transmit the measurement data 21 of the sensor specified in the monitoring model creation information.

FIG. 7 shows an example of the measurement data 21 received by the management server 43. The management server 43 creates a monitoring model of the power plant 10 using such measurement data 21. For this purpose, the management server 43 extracts the relationship for each measurement data 21. For example, as shown in FIG. 8, among a large number of measurement data a1 to an when the power generation plant 10 is operating normally received from the data server 42, the measurement data a1 and the measurement data ak are the same. When the change occurs, the management server 43 determines that there is a strong relationship between the sensor that outputs the measurement data a1 and the sensor that outputs the measurement data ak. In this way, the management server 43 examines the sensor having a strong relationship from the measurement data 21 received from the data server 42.

Extraction of the strength of the relationship between the sensors is performed between the sensor of the main sensor group and the other sensors. For example, when the sensors in the main sensor group are a1 to a5 and the sensors other than the main sensor group are b1 to bn, the management server 43 has a strong relationship between the sensors a1 to a5 and the sensors b1 to bn. The sensor is extracted, and the extraction between the sensors b1 to bn is not performed. Further, when a plurality of main sensor groups exist as in the sensors a1 to a5, the strength of the relationship between the sensors a1 to a5 is also extracted.

After this, the management server 43 creates a model from the strength of all the relationships examined. That is, the management server 43 uses the state of the sensors installed in the monitoring target of the power plant 10 as a monitoring model, which indicates the strength of the relationship between the sensors.
The management server 43 creates such a monitoring model for the entire power plant 10 or each equipment system.

When the management server 43 receives a monitoring instruction to monitor the power plant 10 based on the monitoring models created by the clients 44 to 45, the management server 43 starts monitoring based on the monitoring model and displays a monitoring screen showing the monitoring status on the client. It is displayed on 44 to 45.

FIG. 9 is a monitoring screen Sc3 displayed on the clients 44 to 45 by the management server 43 when monitoring the monitoring model of the reactor auxiliary cooling system, for example. In this monitoring model, dozens of sensors related to the auxiliary cooling system of the reactor are selected, and among these sensors, a sensor group including four sensors is selected as the main sensor group. On this monitoring screen Sc3, a sensor selected at a corresponding position in these devices and systems is displayed against the background of a schematic diagram of a large number of devices and systems such as a nuclear reactor, a turbine, a generator, a pump and a pipe of the power plant 10. The index Sc31 to be represented is displayed, and a line (hereinafter referred to as an invariant line) Sc32 is drawn so as to connect the indexes Sc31 of the sensor in which the strength of the relationship is found. The circled part in the figure is the main sensor group Msg.

As can be seen from the monitoring screen Sc3, the in-alient line Sc32 is drawn so as to connect the four sensors of the main sensor group Msg with the other sensors. That is, in the relationship extraction process of the management server 43, the strength of the relationship between the four sensors of the main sensor group Msg and the other sensors is extracted, but between the sensors other than the main sensor group Msg. The relationship has not been extracted in.

FIG. 10 shows only the four indexes Sc31 of the main sensor group Msg of FIG. 9 and the invariant line Sc32 connecting them. As can be seen from this figure, in the relationship extraction process of the management server 43, when a plurality of sensors exist in the main sensor group Msg, the strength of the relationship between the sensors is also extracted.

Further, FIGS. 11 and 12 show examples of different monitoring screens Sc4 and Sc5. The monitoring screen Sc4 shows a case where hundreds of sensors are selected for the turbine auxiliary cooling system and a sensor group including one sensor is selected as the main sensor group Msg. As can be seen from this monitoring screen Sc4, the strength of the relationship between the sensors is extracted only between the main sensor group and the other sensors, and is not extracted between the sensors other than the main sensor group. .. Further, since the main sensor group of this monitoring model has only one sensor, the relationship between the sensors in the main sensor group is not monitored as a matter of course.

The monitoring screen Sc5 shows a case where hundreds of sensors are selected for the main steam measurement system and a sensor group including 34 sensors is selected as the main sensor group. On the monitoring screen Sc5, the position of the main sensor group is difficult to understand because a large number of invariant lines are interlaced, but extraction is not performed between sensors other than the main sensor group.

The above is the configuration of the plant monitoring system according to this embodiment. Next, the operation of this plant monitoring system will be described with reference to the flowchart of FIG. When the management server 43 receives the model creation instruction from the clients 44 to 45, the management server 43 displays the above-mentioned model creation screen S1 and the sensor selection screen Sc2 on the clients 44 to 45, and selects a sensor to be monitored by the monitoring model (step). Creation of a monitoring model consisting of S1), selection of the main sensor group Msg (step S2), extraction of the strength of the relationship between the sensor of the main sensor group Msg and other sensors (step S3) is executed. do. When a plurality of sensors exist in the main sensor group Msg, the strength of the relationship between the plurality of sensors is also extracted.

When the management server 43 finishes creating the monitoring model, it starts monitoring each equipment system of the power plant 10 using the created monitoring model (step S4). If the disruption of the relationship between the sensors is not detected during this monitoring (NO in step S5), the management server 43 determines whether to end the monitoring, for example, by an instruction from clients 44 to 45 (step S6). ). When the management server 43 determines that the monitoring is finished in step S6, for example, the management server 43 notifies the clients 44 to 45 of the end of monitoring and ends the monitoring (step S7).

On the other hand, when the management server 43 detects that the relationship between the sensors is broken (YES in step S5), the management server 43 notifies, for example, an alarm to the clients 44 to 45 (step S8).

As described above, according to the monitoring system according to the present embodiment, among the plurality of sensor groups in which the sensors are grouped for each device system, the main sensor group Msg directly related to the device system to be monitored is included. Since a monitoring model showing the relationship between the sensor of the above and the sensor other than the main sensor group Msg is created, the relationship between the sensors other than the main sensor group Msg is not monitored. Therefore, compared to the conventional monitoring system in which the relationships between a large number of sensors are brute-forced and monitored, the number of sensor combinations is significantly reduced, so that the processing load of the monitoring system is reduced and monitoring is possible at the same time. It is possible to increase the number of models. Further, since the sensors directly related to the device system to be monitored are always checked and monitored as the main sensor group Msg, the monitoring accuracy does not significantly decrease even if the number of combinations of the sensors to be monitored decreases.

Further, when there are a plurality of sensors in the main sensor group Msg, a monitoring model including the relationship between the plurality of sensors is created, so that the monitoring accuracy does not significantly decrease even if the number of combinations of the sensors to be monitored decreases. ..

Further, the index Sc31 representing the sensor is displayed at the position where the sensor is provided on the schematic diagram of the device system, and the relationship between the sensor in the main sensor group Msg and the sensor other than the main sensor group Msg and the main sensor Since the relationship between the sensors in the group Msg is represented by the invariant line Sc32 connecting the indexes Sc31, the relationship between the sensors monitored by the monitoring model can be visually grasped. The monitoring status can be easily and quickly understood.

Although the embodiment of the present invention has been described above, the specific configuration is not limited to the above-described embodiment, and even if there is a design change or the like within a range that does not deviate from the gist of the present invention, this embodiment is described. Included in the invention.

For example, in the above embodiment, when creating the monitoring model, the operator of the clients 44 to 45 manually selects the sensor and the main sensor group, but any of the sensor and the main sensor group. Either or both may be automatically selected by the management server 43 or the clients 44 to 45. In this case, not only the information about the sensor but also the strength of the relationship with the device system to be monitored is stored in advance in the sensor data 421, and when the device system to be monitored is input to the clients 44 to 45, the sensor The data 421 may be searched and the related sensor may be automatically selected, and the sensor group having the strongest relationship may be automatically selected as the main sensor group from the automatically selected sensors.

Further, in the above embodiment, the example of selecting one main sensor group has been described, but a plurality of sensor groups may be selected as the main sensor group. In addition, although the explanation has been given using a nuclear power plant as an example, it can also be applied to failure prediction of other power plants and plants other than power plants.

10 Power plant 20 Sensor monitoring device 21 Measurement data 30 In-house communication network 40 Model monitoring device 41 Communication control unit 42 Data server 421 Sensor data 43 Management server (model creation means, display control means)
44-45 clients

Claims (4)

A sensor is provided in the device system to be monitored, and a model creation means for creating a monitoring model showing the relationship between each sensor when the device system is normal is provided. In a plant monitoring system that detects changes in the relationship between each sensor based on the monitoring model and outputs the change when the change in the relationship is detected.
The model creation means
Of a plurality of sensor groups in which the sensors are grouped by device or system, monitoring showing the relationship between the sensors in the main sensor group directly related to the device system to be monitored and the sensors other than the main sensor group. Create a model,
A plant monitoring system characterized by this. When there are a plurality of sensors in the main sensor group, the model creating means creates the monitoring model including the relationship between the plurality of sensors.
The plant monitoring system according to claim 1. An index representing the sensor is displayed at a position where the sensor is provided with respect to the schematic diagram of the device system, and the relationship between the sensor in the main sensor group and the sensor other than the main sensor group and the main A display control means for expressing the relationship between the sensors in the sensor group by a line connecting the indexes is provided.
2. The plant monitoring system according to claim 2. Sensors are provided in the device or system to be monitored, a monitoring model that shows the relationship between each sensor when the device system is normal is created, and the actual device system is based on the monitoring model. In the plant monitoring method, which detects a change in the relationship between the sensors and outputs the change when the change in the relationship is detected.
Of a plurality of sensor groups in which the sensors are grouped by device or system, monitoring showing the relationship between the sensors in the main sensor group directly related to the device system to be monitored and the sensors other than the main sensor group. Create a model,
A plant monitoring method characterized by this.

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