JP7604512B2 - Display device, display method, control device, and computer program - Google Patents

Description

The present invention relates to a display device, a display method, a control device and a computer program.

Traditionally, sensors are installed in monitored equipment such as plants, and the operating status of the monitored equipment is monitored based on the data acquired by the sensors. When an abnormality occurs in the monitored equipment, an alarm is sounded and guide information containing a course of action is displayed to support the operator. The guide information is created by experienced personnel who spend a great deal of time scrutinizing various information based on their own knowledge and experience.

Furthermore, Patent Document 1 describes a "plant operation history storage unit" that "records operations performed in each operating state" (paragraph [0038]), and a "plant monitoring device" that "classifies the operation history into specified operating states, and creates and displays operation guide data which is recommended actions for each operating state" (paragraph [0040]).

JP 2014-32633 A

However, guide information created based on the knowledge of experienced operators is inevitably highly personal. For this reason, operators with little experience cannot easily create similar guide information.

Furthermore, the plant monitoring device described in Patent Document 1 merely displays recommended operations to be performed during routine tasks, such as excluding equipment under inspection from monitoring, based on past operation history. Meanwhile, the response policy when an alarm is issued often does not involve operating the plant. For this reason, it is difficult to create guide information when an alarm is issued based on the plant's past operation history.

Furthermore, the plant monitoring device described in Patent Document 1 discloses that the operation guide pattern to be referenced can be selected from an "operation guide selection pattern list" (paragraph [0047], Figure 6). However, since the operation guide patterns are merely obtained from past plant operation history, they do not allow the addition of new information.

Therefore, the present invention aims to provide a display device, a display method, a control device, and a computer program that enable even inexperienced operators to easily add new guide information.

The present disclosure provides a display device having a display screen, configured to display an area on the display screen for adding guide information that is displayed when a warning occurs regarding the operating status of a plant.

Furthermore, the guide information may be configured to be displayed in a first area of the display screen, and the area for adding the guide information may be configured to be displayed in a second area juxtaposed to the first area of the display screen.

Furthermore, the system may be configured to display at least one word contained in information describing the past operating conditions of the plant, and to display the information containing the selected word on the display screen.

Furthermore, the words are extracted by executing a step of calculating a characteristic quantity of at least one of the words based on information describing the past operating conditions of the plant, and a step of calculating the importance of at least one of the words based on the characteristic quantity of the words, and the words may be configured to be displayed on the display screen together with the importance of the words.

The present disclosure provides a display method that includes a step of displaying, on a display screen of a display device, an area for adding guide information that is displayed when a warning occurs regarding the operating status of a plant.

The present disclosure provides a control device that controls a display device having a display screen, and is configured to display on the display screen an area for adding guide information that is displayed when a warning occurs regarding the operating status of a plant.

The present disclosure provides a computer program that causes a computer for controlling a display device having a display screen to execute a step of displaying on the display screen an area for adding guide information that is to be displayed when a warning occurs regarding the operating status of the plant.

FIG. 1 is a schematic diagram showing the overall configuration of a plant. FIG. 2 is a functional block diagram of the plant, the DCS, and the operation support system. FIG. 3 shows an example of guide information displayed on the display screen of the display device. FIG. 4 is a functional block diagram of the important word extraction unit. FIG. 5 shows an example in which an excerpt list of a driving log or the like is displayed side by side with a free entry box. FIG. 6 is a diagram showing the physical configuration of the driving assistance system 30. As shown in FIG. FIG. 7 is a flowchart of a driving assistance method including a display method according to this embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following embodiments are merely examples for explaining the present invention, and are not intended to limit the present invention to the embodiments.
The monitored equipment to which the present invention is applied includes plants. The plants are, for example, power plants including boilers, incineration plants, chemical plants, wastewater treatment plants, and the like, from which process data can be obtained. In addition to the example of process data in power plants described in the following embodiment, the process data in waste incineration plants include, for example, the amount and temperature of air fed into the incinerator, the gas temperature and composition factor at the furnace outlet, and measurement data such as the temperature, pressure, flow rate, and combustion state of each part measured by a sensor or the like. The process data in chemical plants include, for example, the temperature difference between processes or between two or more thermocouples, the operating pressure, product flow parameters (velocity, density, etc.), the flow rate of cooling water, output measurements, valve sensor data, and the like. The process data in wastewater treatment plants include, for example, the amount of raw water flowing in and out of the tank, the water level, the treated water quality, and the operation amount of equipment operation such as various pumps, which are output from each sensor and each watt-hour meter.

[Plant description]
1 is a schematic diagram showing the overall configuration of a plant 1, which is an example of a monitoring target to which the present invention is applied. The plant 1 according to this embodiment is a power generation plant equipped with a circulating fluidized bed boiler (circulating fluidized bed type) that generates steam by burning fuel while circulating a circulating material such as silica sand that flows at high temperature. As fuel for the plant 1, in addition to fossil fuels such as coal, non-fossil fuels (wood biomass, waste tires, waste plastics, sludge, etc.) can be used. The steam generated in the plant 1 is used to drive a turbine 100.

The plant 1 is configured to burn fuel in the furnace 2, separate the circulating material from the exhaust gas by a cyclone 3 that functions as a solid-gas separator, and return the separated circulating material to the furnace 2 for circulation. The separated circulating material is returned to the bottom of the furnace 2 via a circulating material recovery pipe 4 connected below the cyclone 3. The bottom of the circulating material recovery pipe 4 is connected to the bottom of the furnace 2 via a loop seal section 4a with a narrowed flow path. This leaves a predetermined amount of circulating material stored in the bottom of the circulating material recovery pipe 4. The exhaust gas from which the circulating material has been removed by the cyclone 3 is supplied to the rear flue 5 via the exhaust gas flow path 3a.

The boiler comprises a furnace 2 for burning fuel, and a heat exchanger for generating steam and the like using heat obtained by combustion. A fuel supply port 2a for supplying fuel is provided in the middle of the furnace 2, and a gas outlet 2b for discharging combustion gas is provided in the upper part of the furnace 2. Fuel supplied to the furnace 2 from a fuel supply device (not shown) is supplied to the inside of the furnace 2 via the fuel supply port 2a. In addition, a furnace wall tube 6 for heating boiler feed water is provided on the furnace wall of the furnace 2. The boiler feed water flowing through the furnace wall tube 6 is heated by combustion in the furnace 2.

In the furnace 2, the solids containing the fuel supplied from the fuel supply port 2a are fluidized by the combustion/fluidization air introduced from the lower air supply line 2c, and the fuel burns at about 800 to 900°C, for example, while flowing. The combustion gas generated in the furnace 2 is introduced into the cyclone 3, accompanied by the circulating material. The cyclone 3 separates the circulating material from the gas by centrifugal separation, and returns the separated circulating material to the furnace 2 via the circulating material recovery pipe 4, while sending the combustion gas from which the circulating material has been removed through the exhaust gas flow path 3a to the rear flue 5.

In the furnace 2, a portion of the circulating material, called the in-furnace bed material, remains at the bottom. This bed material may contain bed material with coarse particle size that is unsuitable for circulating flow and exhaust combustion impurities, and these bed materials that are unsuitable for circulating flow may cause poor flow. Therefore, in order to suppress poor flow, the in-furnace bed material is continuously or intermittently discharged to the outside from the outlet 2d at the bottom of the furnace 2. After removing unsuitable materials such as metals and coarse particle size from the discharged bed material on a circulation line not shown, the discharged bed material is either supplied again to the furnace 2 or discarded as is. The circulating material of the furnace 2 circulates in a circulation system consisting of the furnace 2, the cyclone 3, and the circulating material recovery pipe 4.

The rear flue 5 has a flow path for flowing the gas discharged from the cyclone 3 to the rear stage. The rear flue 5 has a superheater 10 that generates superheated steam and an economizer 12 that preheats the boiler feed water as an exhaust heat recovery section that recovers the heat of the exhaust gas. The exhaust gas flowing through the rear flue 5 is cooled by heat exchange with the steam and boiler feed water flowing through the superheater 10 and the economizer 12. In addition, it has a steam drum 8 in which the boiler feed water that has passed through the economizer 12 is stored, and the steam drum 8 is also connected to the furnace wall tube 6.

The economizer 12 transfers heat from the exhaust gas to the boiler feed water to preheat the boiler feed water. The economizer 12 is connected to the pump 7 by a pipe 21, and to the steam drum 8 by a pipe 22. The boiler feed water supplied from the pump 7 via the pipe 21 to the economizer 12 and preheated by the economizer 12 is supplied to the steam drum 8 via the pipe 22.

A downcomer pipe 8a and a furnace wall pipe 6 are connected to the steam drum 8. The boiler feed water in the steam drum 8 flows down the downcomer pipe 8a, is introduced into the furnace wall pipe 6 at the lower side of the furnace 2, and flows toward the steam drum 8. The boiler feed water in the furnace wall pipe 6 is heated by the combustion heat generated in the furnace 2, and evaporates in the steam drum 8 to become steam.

A saturated steam pipe 8b that discharges the steam inside is connected to the steam drum 8. The saturated steam pipe 8b connects the steam drum 8 to the superheater 10. The steam inside the steam drum 8 is supplied to the superheater 10 via the saturated steam pipe 8b. The superheater 10 uses the heat of the exhaust gas to superheat the steam to generate superheated steam. The superheated steam passes through pipe 10a and is supplied to a turbine 100 outside the plant 1 and used for power generation.

The pressure and temperature of the steam discharged from the turbine 100 are lower than the pressure and temperature of the steam discharged from the superheater 10. Although not particularly limited, the pressure of the steam supplied to the turbine 100 is approximately 10-17 MPa, and the temperature is approximately 530-570°C. The pressure of the steam discharged from the turbine 100 is approximately 3-5 MPa, and the temperature is approximately 350-400°C.

A condenser 102 is provided downstream of the turbine 100. The steam discharged from the turbine 100 is supplied to the condenser 102, where it is condensed and returned to saturated water, and then supplied to the pump 7. A generator is connected to the turbine 100, which converts the kinetic energy obtained by the rotation of the turbine 100 into electrical energy.

The pump 7a supplies makeup water to maintain a constant water level in the condenser 102. Figure 1 shows the makeup water flow rate u1 (an example of "process data") supplied by the pump 7a.

The process data handled in this embodiment may be any data related to the plant 1, but may be, for example, data obtained by measuring the state of the plant 1 with a sensor (an example of "process data"), and more specifically, may include measured values of the temperature, pressure, flow rate, and the like of the plant 1. FIG. 1 shows the boiler feedwater flow rate u2 (an example of "process data") supplied from the pump 7 to the economizer 12. Furthermore, FIG. 1 shows the boiler outlet steam flow rate u3 (an example of "process data") supplied from the superheater 10 to the turbine 100, and the saturated steam flow rate u4 (an example of "process data") supplied from the steam drum 8 to the superheater 10. The makeup water flow rate u1 may be controlled to follow the saturated steam flow rate u4. Also, the boiler feedwater flow rate u2 may be controlled to be adjusted while monitoring both the boiler outlet steam flow rate u3 (or the superheated steam flow rate) and the liquid level of the steam drum 8.

If a hole occurs in the pipe system that constitutes the plant 1, the makeup water flow rate u1 increases, and the flow rate difference between the boiler feedwater flow rate u2 and the boiler outlet steam flow rate u3 increases. The DCS (Distributed Control System, FIG. 2) 20 receives process data of the plant 1, such as the makeup water flow rate u1, the boiler feedwater flow rate u2, the boiler outlet steam flow rate u3, and the saturated steam flow rate u4, from the plant 1, monitors the operating status of the plant 1, and monitors whether any abnormality has occurred in the plant 1. As will be described later, the monitoring device 40 evaluates the process data based on alarm judgment logic set for each type of abnormality, and if it determines that an abnormality has occurred, causes the display device 50 to issue an alarm.

Although the makeup water flow rate u1, boiler feed water flow rate u2, boiler outlet steam flow rate u3, and saturated steam flow rate u4 are exemplified as process data, the process data related to the plant 1 may be other data. The process data related to the plant 1 may be other data such as temperature and pressure, or data calculated based on multiple process data, or may be uncalculated data obtained from a sensor or the like.

Figure 2 is a functional block diagram of the plant 1, DCS 20 and operation assistance system 30 in this embodiment.

DCS 20 is a distributed control system for controlling plant 1. DCS 20 acquires process data from sensors and the like installed in plant 1, and supplies control signals to plant 1 for controlling plant 1 based on the process data.

The operation support system 30 includes an edge/cloud computing unit 32 that acquires process data from the DCS 20, a monitoring device 40 that acquires the process data from the edge/cloud computing unit 32 and monitors the plant 1 based on the process data, and a display device 50 that displays the operating status of the plant 1 for the operator. The monitoring device 40 (an example of a "control device") also functions as a control device that controls the display device 50. Specifically, the monitoring device 40 acquires the process data and determines whether or not there is an abnormality based on the process data, and if it is determined that an abnormality has occurred, causes the display device 50 to issue an alarm (an example of a "warning"). When issuing an alarm, the monitoring device 40 acquires information to be displayed when an alarm is issued, such as guide information (described later), from a database described later, and displays the information on the display screen of the display device 50.

The edge/cloud computing unit 32 includes multiple edge servers distributed around the periphery of the network, and a cloud data server that collects process data from the multiple edge servers and provides the process data to the monitoring device 40. By including the edge/cloud computing unit 32, it is possible to suitably collect process data from a large-scale monitoring device or multiple distributed monitoring devices. However, the driving assistance system 30 does not necessarily have to include the edge/cloud computing unit 32. In that case, the driving assistance system 30 acquires the process data from the DCS 20 via the network.

The monitoring device 40 includes an alarm display control unit 42 and a storage unit 44 .
The alarm display control unit 42 includes a process data acquisition unit 42A that acquires process data from the edge/cloud computing unit 32, an alarm determination unit 42B that determines whether or not an alarm needs to be issued based on the process data acquired by the process data acquisition unit 42A, an alarm information display unit 42C that causes the display device 50 to display alarm-related information including guide information for guiding the user on how to respond when an alarm is issued, together with the alarm issued when the alarm determination unit 42B determines that an alarm needs to be issued, and a standard guide setting unit 42D that sets standard guide information to be displayed on the display device 50.

Furthermore, the alarm display control unit 42 is configured to be able to add guide information. Specifically, it includes an important word extraction unit 42E for extracting important words (an example of a "word") from the daily driving report DB 44C, and a guide addition setting unit 42F for displaying on the display device 50 the importance of the extracted important words and a part of the daily driving report containing the important words as candidates for guide information to be added, and for receiving input of additional guide information to be added to the standard guide information.

The memory unit 44 of the monitoring device includes an alarm information DB 44A, a guide information DB 44B, and a daily driving report DB 44C. First, we will explain each database of the memory unit 44.

The alarm information DB 44A stores alarm judgment logic (judgment criteria) for judging whether or not an alarm indicating an abnormality or the like of the plant 1 has occurred based on the process data, and information on the history of alarms issued in the past (information including the alarm identification information, the alarm occurrence date and time, etc.). Specifically, the alarm judgment logic is stored for each alarm in association with the alarm identification information, the alarm classification information, and the evaluation item name of the process data related to the alarm. The alarm judgment logic may be one that specifies the judgment criteria for whether or not the value of the process data exceeds a threshold based on the process data acquired from a single sensor, or may specify judgment criteria based on the process data acquired from multiple types of sensors according to a predetermined algorithm (including one based on a predetermined trained model generated by machine learning, and one based on a mathematical formula or mathematical model derived by performing a multivariate analysis or the like on the process data of multiple sensors).

The guide information DB 44B stores guide information to guide the user on how to respond when an alarm is issued. The guide information includes standard guide information that is preset by the standard guide setting unit 42D and additional guide information that is added by the additional guide setting unit 42F.

For example, guide information DB44B records for each alarm a sentence titled "1. Monitoring points (how to read the graph)" that explains how to grasp the event from the graph, and a sentence titled "2. How to respond" that explains how to optimize the state of the process data. Note that a method for optimizing the state of the process data is, for example, a method for optimizing a state in which the process data in question exceeds a threshold, to within the threshold.

Figure 3 shows an example of guide information displayed on the display screen of the display device 50 when the alarm that has been issued is "Circulation system temperature difference 1." In "1. Monitoring points (how to read the graph)," the definition of the furnace temperature difference and the calculation formula are described. Such an explanation allows the operator to confirm how to grasp the event from the graph, making it easier to understand what event is occurring. In "2. How to respond," items that the operator should check depending on the magnitude of the furnace temperature difference are listed. Such an explanation makes it possible to confirm the method for optimizing the state of the process data. The guide information may include images, legend graphs, etc. in addition to text information and formulas. Furthermore, it may have a function to display the time when the same alarm was issued in the past.

Daily operation report DB44C stores information regarding the actual operating status of plant 1. Information regarding the actual operating status of plant 1 includes, for example, an operation log (daily operation report) in which an operator records the results of observing the operating status of the equipment in plant 1 that the operator is responsible for, in order to hand it over to the next operator. Daily operation reports may be prepared for each piece of equipment, such as a boiler or turbine, or for the entire plant. Furthermore, daily operation reports are preferably prepared periodically (for example, at least once a day). Information regarding the actual operating status of plant 1 may include monthly operation reports, maintenance information for the equipment in question, inspection records, repair information, and failure history.

Next, each functional block of the alarm display control unit 42 will be described.
The process data acquisition unit 42A acquires process data from the edge/cloud computing unit 32.

The alarm determination unit 42B determines whether an abnormality has occurred in the plant 1 based on the process data, and when it determines that an abnormality has occurred, it causes the display device 50 to issue an alarm. Specifically, the alarm determination unit 42B reads out the alarm determination logic (determination criteria) recorded in the alarm information DB 44A, and evaluates the process data according to this alarm determination logic. For example, the alarm determination unit 42B evaluates a given process data based on the alarm determination logic, determines whether an abnormality that may occur in the plant 1, such as a blowout (such as a boiler tube leak, in which metal materials such as tubes and pipes that constitute a boiler are damaged and ruptured, causing internal steam to leak to the outside. This includes a state in which a blowout is likely to occur in the future. The same applies below), occurs, and when it determines that a blowout has occurred, it causes the display device 50 to issue an alarm. At the same time, the alarm determination unit 42B records the occurrence of an abnormality in the alarm information DB 44A.

When the alarm determination unit 42B determines that an alarm needs to be issued, the alarm information display unit 42C displays information on the display device 50 for the operator to confirm whether an alarm is appropriate. The display screen of the display device 50 displays information on past and current alarms obtained from the alarm determination unit 42B in list form. In addition, when the operator double-clicks (selects) a specific alarm, the alarm information display unit 42C obtains guide information corresponding to the selected alarm and displays it on the display screen.

The standard guide setting unit 42D sets standard guide information, which is pre-set guide information, among guide information corresponding to an alarm response policy (including information specifying process data, etc., that the operator should check to determine whether an alarm is appropriate when an alarm is issued). Standard guide information is typically highly versatile information that is set by a skilled operator based on his or her own knowledge and experience before operating a plant (or information that can be set before operating a plant).

The important word extraction unit 42E extracts important words (an example of a "word") from the daily driving report DB 44C to assist the driver in setting additional guide information. The important word extraction unit 42E shown in this embodiment uses a known natural language processing method to extract multiple words from the daily driving report, etc., and calculates their importance to extract important words. FIG. 4 shows a functional block diagram of the important word extraction unit 42E. As shown in the figure, the important word extraction unit 42E includes an information extraction unit 42E1 that extracts words that may be important words from the daily driving report, a feature calculation unit 42E2 that calculates statistical information of each word extracted by the information extraction unit 42E1, and an importance calculation unit 42E3 that calculates the importance of each word based on the statistical information of each word.

The information extraction unit 42E1 divides the driving log and other information, which is written in natural language, into morphemes, performs morpheme analysis to identify morphemes whose parts of speech are words, and performs unnecessary part-of-speech filtering and unnecessary word filtering to remove particles and other parts of speech from the morphemes, as well as unnecessary words that cannot become key words.

The feature calculation unit 42E2 calculates statistical information such as the number of occurrences of the words extracted by the information extraction unit 42E1. Specifically, it calculates the occurrence frequency of each word (an example of a "feature"), the n-gram co-occurrence frequency (an example of a "feature"), and the frequency distribution (an example of a "feature"). Note that the n-gram co-occurrence frequency is the co-occurrence frequency of N adjacent words.

The importance calculation unit 42E3 calculates information indicating the importance of each word based on the statistical information of each word calculated by the feature calculation unit 42E2. The importance calculation unit 42E3 calculates the information indicating the importance based on at least one of, for example, TF (Term Frequency), IDF (Inverse Document Frequency), TF-IDF, or concatenation frequency.

Here, TF (an example of "importance") is a value calculated by dividing the number of occurrences of a given word contained in one document _j (or sentence _j ) by the total number of words contained in that document _j (or sentence _j ). IDF (an example of "importance") is a value calculated as the logarithm of the value obtained by dividing the total number of documents (or the total number of sentences) by the number of documents (or the number of sentences) in which a given word appears. TF indicates the frequency of occurrence of a given word for each document (or each sentence). IDF indicates a low value for a word that is used across multiple documents (or sentences). TF-IDF is a value obtained by multiplying TF by IDF. Therefore, TF-IDF (an example of "importance") is an index that indicates a high value for words that appear primarily in only some documents (or sentences), rather than for words that are used across a wide range of documents. The importance calculation unit 42E3 extracts, for example, words having a high TF-IDF value as important words, and displays them together with the TF-IDF value (an example of "importance") on the display device 50. Equation 1 shows an example of a formula for calculating TF(tf _i,j ), IDF(idf _i ), and TF-IDF(tfidf).

The importance calculation unit 42E3 may calculate information indicating the importance of each word based on the concatenation frequency (an example of "importance"). For example, the concatenation frequency may be calculated based on the FLR method, which counts the frequency with which a certain word is used in combination with another word, and words having a high value may be extracted as important words. Since words with high importance (e.g., "circulating particles") are often used in combination with other words with high importance (e.g., "lower furnace temperature"), it is also possible to extract words with high importance by using the concatenation frequency. FIG. 4 shows an example of an important word list L1, which is an example of important words extracted by the important word extraction unit 42E and their importance (score).

The guide addition setting unit 42F sets additional guide information to be added to the standard guide information. The additional guide information is typically guide information based on information obtained by operators observing the plant after the plant has started operating. Since the information is obtained by actually operating the plant, the additional guide information corresponds to information that reflects circumstances specific to the plant.

Therefore, while the standard guide information corresponds to guide information that is likely to be applicable to plants other than plant 1, the additional guide information is guide information that may not be applicable to plants other than plant 1.

The guide addition setting unit 42F displays a free entry field FL (an example of an "area for adding guide information") for accepting additional guide information on the display screen of the display device 50. The guide addition setting unit 42F accepts the information entered by the operator in this free entry field as additional guide information and records it in the guide information DB 44B.

The guide addition setting unit 42F in this embodiment further displays standard guide information and a list L1 (Figure 4) showing important words and their importance in different areas of the display screen of the display device 50 to assist the driver in inputting additional guide information.

In addition, when one of the important words is selected by the driver, the guide addition setting unit 42F accesses the daily driving report DB 44C, reads a part of the daily driving report etc. that contains the selected important word, and displays it in a different area of the display screen of the display device 50.

Therefore, when the driver inputs additional guide information, the guide addition setting unit 42F is configured to simultaneously display standard guide information (Figure 3) corresponding to the guide information before it was added, a list L1 (Figure 4) indicating important words and their importance, an excerpt from the driving log or the like containing the selected important words, and a free entry field.

It is preferable that the standard guide information (Figure 3) and the free entry frame be configured so that they can be displayed side-by-side (i.e., arranged in the same vertical or horizontal position on the display screen). For example, the standard guide information may be displayed in the area on the left side of the display screen (an example of a "first area"), and the free entry frame may be displayed in the area on the right side of the display screen (an example of a "second area"). By displaying them in this manner, it is possible to input content that does not contradict the standard guide information as additional guide information while checking the standard guide information.

Furthermore, when a different important word in list L1 is selected by the driver, guide addition setting unit 42F accesses daily driving report DB 44C, reads a part of the daily driving report etc. that includes the newly selected important word, and displays it in a different area of the display screen of display device 50. By displaying it in this manner, it becomes possible to input additional guide information while referring to the daily driving report etc. related to multiple important words.

Figure 5 shows an example in which, when a driver selects the important word "circulating particles," a list L2 of excerpts from the driving log, etc., including "circulating particles," and a free entry field FL (guide entry field) are displayed side by side on the display screen of the display device 50. As shown in the figure, the guide addition setting unit 42F may highlight the selected important word.

As shown in the figure, the guide addition setting unit 42F may create a list L2 to extract sentences containing important words for multiple dates and times from a driving log, etc. By extracting sentences containing important words for multiple dates and times, it becomes possible to efficiently find related sentences.

In addition, the guide addition setting unit 42F may create list L2 to display sentences that contribute to importance (e.g., sentences with a large TF) at the top.

Furthermore, the guide addition setting unit 42F may access the alarm information DB 44A and create a list L2 so as to display at the top text, etc., created on the day (or before or after) when the alarm corresponding to the additional guide information occurred. The display device of this embodiment displays on the display screen an area for adding guide information to be displayed when a warning occurs regarding the plant's operating status, and simultaneously displays information regarding the past plant operating status when a warning of the same (or same category) as this warning occurred.

Figure 6 is a diagram showing the physical configuration for realizing the driving assistance system 30 according to this embodiment. However, since the edge/cloud computing unit 32 can adopt a known physical configuration, a description thereof will be omitted, and the following describes the physical configuration of the driving assistance system 30 excluding the edge/cloud computing unit 32.

The driving assistance system 30 has a CPU (Central Processing Unit) 30A equivalent to a calculation unit, a RAM (Random Access Memory) 30B and a ROM (Read only Memory) 30C equivalent to a storage unit, a communication unit 30D, an input unit 30E, and a display unit 30F. These components are connected to each other via a bus so that data can be transmitted and received. In this example, the driving assistance system 30 is configured by one computer, but the driving assistance system 30 may be configured by multiple computers. For example, the display unit 30F may be configured by multiple displays. In addition, the configuration shown in FIG. 6 is only an example, and some of these components may not be included. Furthermore, some of the components may be provided in a remote location. For example, a part of the ROM 30C may be provided in a remote location and configured to be able to communicate via a communication network.

CPU 30A is an arithmetic unit that performs control processing and arithmetic processing, etc., included in this disclosure by executing computer programs, etc., recorded in ROM 30C, etc. CPU 30A is equipped with a processor. CPU 30A receives various information (including process data) from RAM 30B, ROM 30C, communication unit 30D, input unit 30E, etc., and displays the arithmetic processing results, etc. on display unit 30F or stores them in RAM 30B or ROM 30C.

RAM 30B functions as a cache memory in the memory section and may be composed of volatile semiconductor memory elements such as SRAM and DRAM.

ROM 30C functions as the main memory of the storage unit, and may be configured, for example, as a non-volatile semiconductor memory element such as a flash memory that allows information to be electrically rewritten, or a HDD that allows information to be magnetically rewritten. ROM 30C may store, for example, computer programs and data for executing processes including the various controls and arithmetic processes shown in this disclosure.

The communication unit 30D is an interface for connecting the driving assistance system 30 to other devices such as the DCS 20. The communication unit 30D may be connected to a communication network such as the Internet.

The input unit 30E accepts data input from the operator (including selection of key words in this disclosure and input of additional guide information) and may include, for example, a mouse, keyboard, and touch panel.

The display unit 30F visually displays the results of calculations performed by the CPU 30A and may be composed of, for example, an LCD (Liquid Crystal Display).

In the physical configuration described above, it is possible to realize each function constituting the alarm display control unit 42 of the monitoring device 40 mainly by the CPU 30A executing a computer program, it is possible to realize each database constituting the memory unit 44 mainly from the ROM 30C, and it is possible to realize the display device 50 mainly from the display unit 30F.

[Display method]
Hereinafter, a series of driving support methods will be described, including a display method for creating guide information to be displayed when an alarm is issued to the driver using the driving support system 30. Fig. 7 is a flowchart including such a display method.

First, standard guide information is created. Based on the standard guide setting unit 42D of the operation support system 30, an experienced operator inputs standard guide information summarizing the response policy for each alarm (including information identifying the process data, etc. that the operator should check in order to determine whether an alarm is appropriate when it is issued). The standard guide information is typically highly versatile guide information that is created in advance before the start of operation of the plant 1, and may include information that can also be used in other plants of the same type. The input standard guide information is registered in the guide information DB 44B.

After that, plant 1 begins operation. The operator records an operation log every day based on the actual operating status of plant 1. The operation log is stored and accumulated in operation log DB 44C. Furthermore, alarm determination unit 42B evaluates predetermined process data based on alarm determination logic to determine whether or not an abnormality has occurred. If it is determined that an abnormality has occurred, monitoring device 40 causes display device 50 to issue an alarm and display guide information. The guide information displayed at this time corresponds to standard guide information that has been set in advance. The operator deals with the alarm based on the standard guide information.

After a sufficient period of time has passed, the operator begins setting additional guide information for the specified alarm. First, the important word extraction unit 42E accesses the driving log DB 44C and obtains information on the actual operating status, such as the driving log (step S71).

Next, the important word extraction unit 42E extracts important words based on the acquired information (step S72). A list of important words and their importance, current guide information, and a free entry box FL are displayed on the display screen of the display device 50. The guide information and the free entry box FL are displayed, for example, side by side in the horizontal direction of the display screen.

The important word extraction unit 42E may be configured to extract different important words depending on the content of the alarm. For example, the importance calculation unit 42E3 may be configured to calculate the importance of a predetermined word for a predetermined alarm so that the importance of the word is high in advance. The information extraction unit 42E1 may be configured to filter out words that are less relevant to the alarm depending on the content of the alarm and exclude them from the important words.

The operator checks the list of important words and their importance (step S73) and selects an important word based on the importance (score) (step S74). When one of the important words is selected by the operator, the guide addition setting unit 42F accesses the daily driving report DB 44C, reads a part of the daily driving report etc. that contains the selected important word, and displays it in a different area of the display screen of the display device 50. At this time, by displaying multiple candidates for sentences that contain the important word, it becomes possible to efficiently find information suitable for additional guide information.

The driver reviews excerpts of the guide information and daily driving logs, etc. (step S75) and determines whether there is any information that should be added to the guide information (step S76).

If it is determined that there is information to be added to the guide information (YES), the operator inputs the additional guide information to be added to the free entry box FL based on an excerpt from the daily driving report, etc. (step S77). The guide addition setting unit 42F accepts the information input by the operator in the free entry box FL as additional guide information and records it in the guide information DB 44B. Thereafter, when an alarm is issued, the guide information including the additional guide information is displayed on the display screen of the display device 50.

Here, the additional guide information may be information based on differences in the specifications of the plant's equipment. The specifications of the plant's equipment vary depending on the power generation scale of the plant, and the standard guide information may only describe measures that apply to boilers in general, without taking into account such differences in the specifications of the equipment. For example, the regulation values for sulfur oxides (SOx) and nitrogen oxides (NOx) of a boiler, which is one of the equipment of a plant, differ depending on the specifications. Accordingly, some boilers have denitration equipment and desulfurization equipment, while others do not. In addition, the required temperature and pressure may differ depending on the boiler. The inventors of the present application focused on this point and came up with the idea of creating guide information that reflects the unique circumstances of the plant, such as differences in the specifications of the plant's equipment, by making it possible to add guide information rather than fixing the guide information.

Furthermore, focusing on information that has been created and accumulated for different purposes, such as operation logs, the system is configured to access information on the actual operating status of the plant and display it simultaneously when adding guide information. This reduces the burden of creating guide information and enables even inexperienced operators to easily add new guide information that takes into account the unique circumstances of the plant.

In addition, rather than simply displaying information about the actual operating status of the plant, the system is configured to narrow down information of high importance and allow operators and other guide creators to view it, further reducing the burden of creating guide information.

In addition, the present invention can be modified in various ways without departing from the gist of the invention. For example, machine learning techniques may be used to extract important words and calculate their importance. In this case, training data may be created that is rewarded for actually being added to the additional guide information. In addition, the identification information of the driver who created the driving log may be used as one factor. Machine learning models include those that use neural networks such as convolutional neural networks (CNN), those that use regression models such as Gaussian process regression, and those that use tree algorithms such as decision trees. When collecting information for machine learning, the edge/cloud computing unit 32 can also be used. In addition, some components in one embodiment can be added to other embodiments within the scope of the normal creative ability of a person skilled in the art. Also, some components in one embodiment can be replaced with corresponding components in other embodiments.

1 Plant 2a Fuel supply port 2b Gas outlet 2c Air supply line 2d Exhaust port 3 Cyclone 3a Exhaust gas flow path 4 Circulating material recovery pipe 4a Loop seal section 5 Rear flue 6 Furnace wall pipe 7 Pump 30 Operation support system 30D Communication section 30E Input section 30F Display section 32 Cloud computing section 40 Monitoring device 42 Alarm display control section 42A Process data acquisition section 42B Alarm judgment section 42C Alarm information display section 42D Standard guide setting section 42E Important word extraction section 42F Guide addition setting section 44 Memory section 50 Display device 100 Turbine 102 Condenser

Claims (7)

A display device having a display screen,
guide information to be displayed when a warning regarding the operating status of the plant is issued is displayed in a first area of the display screen, and at the same time, an area for adding the guide information is displayed in a second area of the display screen , and at the same time, at least one word that is included in information describing the past operating status of the plant and has a high degree of importance with respect to the warning is displayed in a different area of the display screen,
The display device, wherein the words are extracted based on the importance of at least one of the words, the importance being calculated based on feature amounts of the words. The second area for adding the guide information is configured to be displayed in juxtaposition to the first area on the display screen.
The display device according to claim 1 . configured to display, on the display screen, the information describing the past operating conditions of the plant, including the selected word;
The display device according to claim 1 . The word is
calculating a feature amount of at least one of the words based on information describing a past operating state of the plant;
calculating the importance of at least one of the words based on the feature amount of the word;
configured to display the words together with the importance of the words on the display screen.
The display device according to claim 3 . displaying guide information to be displayed when a warning regarding the operating status of the plant is issued in a first area of a display screen of a display device, simultaneously displaying an area for adding the guide information in a second area of the display screen , and simultaneously displaying at least one word that is included in information describing the past operating status of the plant and has a high degree of importance with respect to the warning in a different area of the display screen,
The display method, wherein the words are extracted based on the importance of at least one of the words, which is calculated based on feature amounts of the words. A control device for controlling a display device having a display screen,
guide information to be displayed when a warning regarding the operating status of the plant is issued is displayed in a first area of the display screen, and at the same time, an area for adding the guide information is displayed in a second area of the display screen , and at the same time, at least one word that is included in information describing the past operating status of the plant and has a high degree of importance with respect to the warning is displayed in a different area of the display screen,
The control device, wherein the words are extracted based on the importance of at least one of the words, the importance being calculated based on feature amounts of the words. A computer for controlling a display device having a display screen,
a computer program for executing a step of displaying, in a first area of the display screen, guide information to be displayed when a warning regarding an operating status of a plant is generated, and simultaneously displaying, in a second area of the display screen, an area for adding the guide information; and simultaneously displaying, in a different area of the display screen, at least one word that is included in information describing a past operating status of the plant and has a high degree of importance with respect to the warning,
The computer program product is characterized in that the words are extracted based on at least one importance of the words, which is calculated based on feature amounts of the words.

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