JPH05135002A - Operational manipulation evaluation system for process plant - Google Patents

Abstract

PURPOSE:To evaluate influences and effects applied to a plant by an operational manipulation in advance before executing the manipulation. CONSTITUTION:This system is composed of a knowledge data base device 3 storing data to be the base of plant functional performance evaluation, plant functional performance evaluating device 2 to evaluate the current condition of plant operations based on process data fetched from the plant and a performance evaluation expression read from the knowledge data base device 3 while using functional performance evaluation exponents, manipulation influence evaluating device 4 to evaluate the infleunces and effects, which are exerted to the performance functions of the plant by the manipulation to be executed from now, based on functional performance evaluation exponent data read from the data base device 3 and functional performance evaluation exponent of the current condition calculated by the plant functional performance evaluating device, man-machine interface device 5 to output evaluated results and to input information from operators, and plant functional performance evaluation exponent preparing device 6 to register the functional performance evaluation exponent data of the plant on the knowledge data base device 3 in advance by using a simulator 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the operation of a process plant, which is capable of obtaining in advance the effect and effect on the plant of the corresponding operation that the operator intends to take when an abnormality is detected in the operation of the plant. Operation evaluation system.

[0002]

2. Description of the Related Art In recent years, advanced information technology has been developed in power plants and the like, and a driving support system that systematically manages information and appropriately processes information necessary for driving operation and provides it to operators is utilized. Has been done. As a conventional operation support system, it is necessary to classify and pattern the abnormal signs of the plant in advance to systematize the operation information corresponding to each type, and to cope with the abnormal signs observed from the plant. There are some that provide various operation information. In addition, the application of an expert system to driving assistance is being put into practical use. This type of system uses a model that hierarchically expresses the plant as a flow of mass, energy, and control information by abstract function levels, and compares it with the response during normal operation of the plant to obtain normal values. There is a system that detects the deviation of the error and further interprets this information based on the knowledge base of the interdependence of mass, energy flow, and function to identify the location of the abnormality and give the operator a corresponding operation guide. ..

[0003]

The conventional driving support system has the function of detecting the abnormality, inferring the cause, and the operation guidance function corresponding thereto. However, it has a function of predicting the effect of the corresponding operation on the plant. I haven't got it. Therefore, if an unknown event occurs,
After the operation procedure indicated by the operation support system or the operation procedure considered by the operator himself is reached, it is not clear what kind of influence or effect the operation will have on the plant. For operators who do not have the accumulation of driving experience that can be evaluated, there is concern about operation for unknown events. Therefore, the present invention solves the problems of the above-mentioned conventional techniques, evaluates the effect of the operation on the plant before executing the operation, the effect in advance, and realizes more reliable operation of the plant by ensuring safety. It is an object of the present invention to provide an operation evaluation system for a process plant that can contribute to operation.

[0004]

In order to achieve the above object, the present invention is a knowledge in which data such as a functional configuration of a plant, a functional evaluation index, and a performance evaluation formula, which are the basis of the functional performance evaluation of the plant, are accumulated. A database device, a plant functional performance evaluation device that evaluates the current operating condition of the plant using a functional performance evaluation index based on the process data imported from the plant and the performance evaluation formula read from the knowledge database device, and the evaluation from the operator The effect of the corresponding operation on the performance function of the plant according to the request information is evaluated based on the function performance evaluation index data read from the database device and the current function evaluation index calculated by the plant function performance evaluation device. The operation impact evaluation device to be given, and the evaluation results of the plant function performance evaluation device and operation impact evaluation device As well as the force, the man-machine interface device that accepts input information from the operator,
It is characterized in that it comprises a plant functional performance evaluation index creating device which calculates in advance plant functional performance evaluation index data based on simulated process data from a simulator and registers it in the knowledge database device.

[0005]

According to the present invention, the evaluation result given by the plant functional performance evaluation is displayed on the man-machine interface device, and the operator sees the evaluation result and knows the abnormal sign generated in the plant. After making an operation decision to deal with the situation, the operator can know the effect on the plant if the operation is actually performed by giving evaluation request information to the operation effect evaluation device in advance. The driver can perform the operation without feeling uneasy, and the reliability of the driving operation can be enhanced.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment in which the present invention is applied to a power plant will be described below with reference to the accompanying drawings.

FIG. 1 is a system diagram showing the configuration of a process plant operation evaluation system according to this embodiment.
In the figure, reference numeral 1 indicates a plant to be evaluated,
Reference numeral 2 indicates a plant functional performance evaluation device that evaluates the function of the plant with a numerical value called a performance evaluation index. Reference numeral 3 is
1 shows a knowledge database device in which data such as a functional configuration of a plant 1, a performance evaluation index and a performance evaluation formula for the function are accumulated and saved. The plant functional performance evaluation device 2 is
The process data taken from the plant 1 is used as a parameter, and the process data is input to the functional configuration of the plant read from the knowledge database device 3 and the performance evaluation formula regarding the function to calculate the current performance evaluation index.
Reference numeral 4 is a plant functional performance evaluation device 2 and a knowledge database regarding what kind of influence and effect the corresponding operation to take to cope with the current operating state of the plant 1 in response to an evaluation request from an operator affects the plant 1. This is an operation influence evaluation device that evaluates using the current plant function evaluation index read from the device 3 and the performance evaluation index calculated in advance. Reference numeral 5 is a man-machine interface device that outputs data such as a performance evaluation index calculated by the plant function performance evaluation device 2 and the operation impact evaluation device 4 and that receives input of information from an operator. Reference numeral 6 is a plant function performance evaluation index creation device for creating a performance evaluation index of the plant function in advance based on the parameters of the simulated process data output by the plant simulator 7 and registering this data in the knowledge database device 3. .

Here, the knowledge database device 3 stores the functional configuration of the plant 1 in the case of electric power production as an abstracted model as shown in FIG. In this embodiment, the function of the plant 1 is regarded as a flow of energy for the purpose of power generation, and each function is expressed hierarchically with a high degree of abstraction. That is, the heat source of the plant is transferred to the turbine generator in the form of steam, where heat is converted into electrical energy. The converted electricity is sent to the grid, while the remaining energy is dumped into the environment as waste heat.
Here, the functions are expressed by comprehensive higher-level functions of the entire plant, but it is also possible to divide each function in detail and express it as a lower-level more detailed function.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG. First, the plant functional performance evaluation device 2 reads the performance evaluation formula data 11 which is the basis of the plant functional performance evaluation from the knowledge database 3 (step 20). In this case, the performance evaluation formula data is given as a parameter serving as an index of the performance evaluation set as shown in FIG. 6 for each component of the plant functional configuration shown in FIG. Then, the plant function performance evaluation apparatus 2 takes in various parameters 12 consisting of process data showing the current state of the plant function from the plant 1 (step 21), and using these, the plant function as it is as shown in FIG. A functional performance evaluation index (PI) of the functional configuration is calculated (step 22). In this case, in FIG. 3, although the heat conversion function deteriorates even though the heat source is rated, the amount of waste heat to the environment increases, but the amount of power generation supplied to the power grid is below the rated value. It is shown. As described above, the functional performance evaluation index (PI) is expressed as a ratio when the rated time is taken as 100 with reference to the rated time. Plant functional performance evaluation device 2
Outputs the calculated present functional performance evaluation index 13 to the man-machine interface device 5, and the operator is informed of the present plant state in the man-machine interface device 5 as shown in FIG. It is displayed as the expressed functional performance evaluation index.

The operator sees the current functional performance evaluation index and knows the deterioration of the heat conversion function as described above. Here, the driver is instructed from a driving support device (not shown) as a countermeasure operation for coping with the deterioration of the heat conversion function at this time, for example, a countermeasure operation such as reducing the output of the heat source, that is, the boiler, or Judge the same corresponding operation by one's own experience. So the operator
It is possible to obtain a preliminary evaluation of the effects and effects of this corresponding operation that will be performed on the plant actually as follows. In this case, the evaluation request information 14 is read by the operation impact evaluation device 4 via the man-machine interface device 5 as to how much the boiler output should be reduced before the waste heat to the environment falls within the rated value (step 23). .. The operation influence evaluation device 4 takes in the current functional performance evaluation index 15 shown in FIG. 3, reads the combination data 16 of the previously prepared functional performance evaluation index shown in FIG. The functional performance evaluation index in the case of operating the corresponding operation is calculated based on the above information, and the evaluation result is displayed via the man-machine interface device 5 (step 24). Note that the combination data is obtained by simulating a situation that can be assumed when being offline by the simulator 7, and calculating the functional performance evaluation index in each plant state by the plant functional performance evaluation index creation device 6 in the knowledge database 3 The data is registered in the above, and the procedure of this registration will be described later.

Thus, the man-machine interface device 5
Then, as an answer to the above evaluation request, the effect of the operation on the plant is quantitatively displayed in the form of a functional performance evaluation index as shown in FIG. That is, it can be obtained as a preliminary evaluation that the operation of lowering the boiler output so as to lower the functional performance evaluation index of heat conversion to 75% of the rated value does not increase the waste heat to the environment above the rated value. Therefore, the operator sees this evaluation result and executes the corresponding operation. Here, the function evaluation request information is described as the content of how much the waste heat to the environment falls within the rated value when the boiler output is reduced, but it is not limited to this, and, for example, the corresponding operation is It is also possible to input a specific functional performance evaluation index of the environmental function as the evaluation request information 14 from the man-machine interface device 5 and perform an evaluation of giving a specific functional performance evaluation index to a required operation. .. After the operation is executed as described above, the preliminary evaluation for another operation can be performed in the same procedure depending on the situation (step 25).

Next, based on the flowchart of FIG.
A process of registering in the knowledge database device 3 data which is a combination of the functional performance evaluation indexes for each function shown in FIG. 7 will be described. This registration process is an offline process, in which the simulator 7 is used to generate parameters of process data in various plant operation modes as simulated plant signals. First, the plant functional performance evaluation index creation device 6 reads the functional configuration of the plant and the performance evaluation formula data 17 for calculating the functional performance evaluation index for each functional configuration from the knowledge database device 3 (step 30). At the same time, the plant functional performance evaluation index creation device 8 takes in the parameter 18 from the simulator 7 and calculates a functional performance evaluation index (steps 31, 32). The functional performance evaluation index thus created is output and registered as information 19 in the knowledge database device 3 as a combination shown in FIG. 7 (step 33). Note that the above registration processing has been described by taking the example of the functional configuration of the plant having the highest hierarchical level as shown in FIG. 2, but the same applies to the case where the functional configuration is detailed to a lower function. The functional performance evaluation index is calculated in accordance with the procedure of and is registered in the knowledge database device 3.

[0013]

As is apparent from the above description, according to the present invention, it is possible to determine how the operation corresponding to the evaluation request information from the operator has an effect on the performance function of the plant. Since it is equipped with an operation impact evaluation device that evaluates based on the function performance evaluation index data read from the database device and the current function evaluation index calculated by the plant function performance evaluation device, an operation guide or operation issued from the operation support system. Since the plant's evaluation of the actions that should be taken to deal with situations determined based on its own experience is obtained in advance, the reliability of the operator's operation is improved, and as a result, the safety of plant operation is further ensured. There is a great contribution.

[Brief description of drawings]

FIG. 1 is a system diagram showing the configuration of an embodiment of a process plant operation evaluation system according to the present invention.

FIG. 2 is an explanatory diagram showing an example of an expression at the highest hierarchical level of the electric power function configuration when the present invention is applied to a power plant.

FIG. 3 is an explanatory diagram showing performance evaluation indexes of respective constituent functions when an abnormality occurs in the heat conversion function in the functional structure example of FIG. 2.

FIG. 4 is an explanatory diagram showing a performance evaluation index as a result of evaluating the influence of a countermeasure operation against a decrease in the heat conversion function on the plant in the functional configuration example of FIG.

FIG. 5 is a flowchart showing a flow of online processing when performing a preliminary evaluation of a corresponding operation in the embodiment of the present invention.

6 is a diagram showing an example of parameters used to calculate a performance evaluation index in the functional configuration example of FIG.

FIG. 7 is a diagram showing performance evaluation index data for each function of the functional configuration example registered in advance in the knowledge database device in the functional configuration example of FIG. 2;

FIG. 8 is a flowchart showing an off-line processing flow when registering performance evaluation index data using a simulator in a knowledge database device.

[Explanation of symbols]

 1 Plant 2 Plant Functional Performance Evaluation Device 3 Knowledge Database Device 4 Man-Machine Interface Device 5 Operation Impact Evaluation Device 6 Plant Functional Performance Evaluation Index Creation Device 7 Simulator

Claims (1)

[Claims] 1. A knowledge database device in which data such as a function configuration, a function evaluation index, and a performance evaluation formula of a plant, which is a basis of functional performance evaluation of a plant, is accumulated, process data acquired from the plant, and the knowledge database device. Based on the read performance evaluation formula, the plant performance evaluation device that evaluates the current operating status of the plant using the functional performance evaluation index, and the operation corresponding to this according to the evaluation request information from the operator is the performance function of the plant. Operation impact evaluation device that gives an evaluation based on the function performance evaluation index data read from the database device and the current function evaluation index calculated by the plant function performance evaluation device, the plant function performance evaluation device, and the operation effect Outputs the evaluation result of the evaluation device and accepts input of information from the operator Machine interface device and a plant functional performance evaluation index creation device that calculates plant functional performance evaluation index data in advance based on simulated process data from a simulator and registers it in the knowledge database device. Driving operation evaluation system.