JPH04268906A - Simulator for unit computer - Google Patents

Abstract

PURPOSE:To easily execute a variation test for an abnormal processing test or the like by generating optional analog data and digital data at optional timing. CONSTITUTION:When generation information is digital signal generation, a digital simulation data generating part 8 generates a digital signal 11. When the generation information is time acceleration, a time acceleration part 9 changes a base timer in a unit computer and accelerates its internal time. When the generation information is an analog signal 14, the information of a base data part 10 is rewritten. Information such as a rate of change for changing the analog signal 14 is stored in the data base part 10, analog simulation data generating part 13 periodically refers the information and varies the analog signal 14. Since signal judging information and the generation information are previously determined in an information defining part 6, optional simulation data are formed at optional timing. In addition, test time is accelerated at optional timing.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a unit computer simulator suitable for carrying out a simulation test of a unit computer for controlling a plant, particularly for monitoring and controlling a thermal power plant.

0002

[Prior Art] In conventional unit computer simulators, as described in Japanese Patent Application Laid-Open No. 61-267802, simulated data of a process input to a computer is stored, and the data is automatically set at a predetermined timing during a simulation test. This is what you set.

0003

[Problem to be Solved by the Invention] Conventional unit computer simulators generate simulated data of stored processes at specific timings, and cannot generate data at arbitrary timings. There was a problem when conducting variation tests such as abnormality tests. Furthermore, there was no consideration given to shortening the test time, and there was a problem with the test time when implementing many test cases.

An object of the present invention is to provide a simulator for a unit computer that can arbitrarily generate simulated data and shorten the time required for one test in order to perform variation tests such as abnormality handling tests. It is in.

[0005]

[Means for Solving the Problems] In order to achieve the above object, a unit computer simulator according to the present invention is installed in a unit computer that monitors and controls a plant, and is configured to store simulated data used for simulation tests of the unit computer. A determination unit that determines the generation timing; a digital simulation data generation unit and an analog simulation data generation unit that generate digital simulation data and analog simulation data at the determined generation timing; and internal time of the unit computer at the determined generation timing. and a time acceleration unit that accelerates the simulation test time and shortens the simulation test time.

The determination unit is connected to the information definition unit that stores the determination information and occurrence information of the simulated data, and determines the generation timing based on the determination information, and determines the generation and occurrence of each simulated data based on the occurrence information. A configuration in which acceleration of internal time is determined may also be used.

[0007]

[Operation] According to the unit computer simulator of the present invention, one set of judgment information (occurrence timing information) and occurrence information (e.g. process simulation data) is set in advance for one simulation data by the number of simulation data. The determination section periodically refers to the stored determination information in the information definition section and detects the generation timing of the simulated data. When the occurrence timing is detected, the following processing is performed based on the occurrence information paired with the determination information.

First, when the generated information is digital signal generation, the digital simulated data generation section generates the digital signal. If the occurrence information is time acceleration, the time acceleration section accelerates the internal time by changing the base timer of the unit computer. Furthermore, if the generated information is an analog signal, the information in the base data section 10 is rewritten. The base data section stores information such as the rate of change for varying the analog signal, and the analog simulation data generating section refers to this information at regular intervals to vary the analog signal. By predefining the signal determination information and occurrence information in the information definition section as described above, arbitrary simulated data is generated at an arbitrary timing, and furthermore, the test time is accelerated at an arbitrary timing.

[0009]

Embodiment An embodiment of the present invention will be described with reference to FIGS. 1 and 2.

As shown in FIG. 1, the simulator 4 is built into a unit computer 5 that monitors and controls the plant. Analog and digital plant process signals are taken in via the input/output device 2. Application software 3
performs various processing based on these plant process signals and displays and prints them on the CRT 21 and T/W 22. Further, a control signal is outputted via the process input/output device 2.

The simulator 4 is a process input/output device 2
Automatically generates input/output plant process signals as simulation data (simulation data). Generate simulation data instead of online data, as shown by the dotted line during factory testing.
It is used to check the operation of the application software 3. The input device 23 is connected to the simulator 4 and is provided for manually switching online data and starting the simulator 4.

As shown in FIG. 2, the simulator 4 includes an information definition section 6 that stores judgment information on the generation timing of simulated data and information on the generation of the simulated data, and a determination section 7 that determines the generation timing. , a digital simulated data generation unit 8 that generates simulated data based on the generated information of the information definition unit 6, a time acceleration unit 9 that accelerates time at a predetermined timing, and information for generating analog signals is stored. Base data section 10 and base data section 10
and an analog simulated data generation section 13 that generates an analog signal based on the signal.

The operation of this embodiment will be explained with reference to FIGS. 2 to 4.

As shown in FIG. 3, a set of determination information (occurrence timing information) and occurrence information (for example, process simulation data) is defined as detailed information within the information definition section. Judgment information is an element that determines the timing of generation of simulated data, and includes ■current time, ■elapsed time from the start of simulation, and ■analog simulated data value (
There are five types: (above the judgment value), (2) the value of the analog simulated data (below the judgment value), and (2) the state value of the input point of the digital simulation data. Further, as the generation information of the simulated data, if the simulated data is digital, it has an input/output point number and a state value, and in the case of time acceleration, it has an acceleration instruction and a time magnification to be accelerated. If the simulated data is analog, the input/output point number, its current value, and rate of change are defined.

(Example 1) is an example in which when the current time reaches t1 minute, the main steam temperature is increased by ΔT°C every hour from T1°C, and in (Example 2), the main steam temperature of analog simulation data is increased by ΔT°C every hour. An example is shown in which the base timer inside the computer is accelerated N times when the temperature exceeds T2°C. The above detailed information is stored in the information definition section for each simulated data generated. Furthermore, when the generation information of the information definition section is an analog signal, generation information is stored in the base data section. Next, the processing procedure of the determination unit 7 shown in FIG. 2 is shown in FIG.

The determination section 7 is activated periodically by a base timer, and detects the timing of generation of simulated data by referring to the information definition section 6. First, in step 10, it is determined whether or not there is an information definition in the information definition section. If the information is present, in step 20, the timing of generation of the first detailed information is determined. The determination is made by determining the timing of occurrence when the following conditions are satisfied for each type of determination information.

(1) Current time Calculator internal real time≧Current time of judgment information (2) Elapsed time Elapsed time in simulator≧Elapsed time of judgment information (3) Value of simulated data (more than) Current value of simulated data≧judgment Judgment value of information (4) Value of simulated data (below) Current value of simulated data ≦ Judgment value of judgment information (5) State value of digital simulated data Current value of simulated data = Condition equal to or greater than the judgment value of digital simulated data If it is true, in step 30, depending on the type of generation information of the simulated data, the time acceleration unit 9
In the case of analog simulated data, generation information is passed to the base data unit 10, and in the case of digital simulated data, the generation information is passed to the digital simulated data generation unit 8. The time acceleration unit 9 performs step 5
Time acceleration is realized by updating the base timer inside the computer with 0. Here, the base timer is a timer that periodically activates the program group of the application software 3, and by advancing the timer cycle, the apparent time is accelerated. The digital simulated data generation section 8 generates simulated data based on the generation information passed in step 40. In the case of an analog signal, the information passed to the base data unit 10 in step 60 is stored. Based on this stored information, the analog simulated data generating section 13 adds an amount corresponding to the rate of change to the current value each time the base timer activates the current value, and generates an analog signal as simulated data of the current value.

As described above, detailed information in the information definition section is determined to have been generated in step 70, and it is determined in step 80 whether there is next detailed information. Through the above processing,
It is possible to generate arbitrary simulated data at arbitrary timing.

Further, when performing a normal simulation test, about t11 hours are required as shown in FIG. However, in reality, the time period required for confirmation is the time period when the plant data fluctuates greatly, and the other times are only for normal monitoring.

That is, when executing a simulation test, it is necessary to generate various plant process signals in a form close to actual plant data. Although FIG. 4 shows three representative analog input points, in reality, several tens of simulated data points are generated. These data are interrelated, and when the main steam temperature rises due to boiler ignition and reaches a certain temperature, it becomes necessary to start the turbine, etc. By using the information definition unit for association for generating these simulated data, it becomes possible to create mutual relationships among various process data.

Furthermore, when time acceleration is not performed, time t11 is required for the simulation test, but in reality there is also time (dotted line) that is unnecessary for the confirmation work. Therefore, the tm time can be shortened by instructing information to double the unnecessary time.

[0022]

According to the unit computer simulator of the present invention, arbitrary analog data and digital data can be generated at arbitrary timing, and variation tests such as abnormality processing tests can be easily performed. Furthermore, by accelerating the time, the time required for simulation testing can be significantly shortened, the test time per test can be shortened, and many test cases can be executed, which has the effect of improving quality.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the arrangement of an embodiment of the present invention.

FIG. 2 is a configuration diagram showing an embodiment of the present invention.

FIG. 3 is a diagram showing an example of an information definition section in FIG. 1;

FIG. 4 is a flowchart showing the processing of this embodiment.

FIG. 5 is a diagram showing an example of simulated data during a simulation test.

[Explanation of symbols]

1 Plant 2 Process input/output device 3 Application software 4 Simulator 5 Unit calculator 6 Information definition section 7 Judgment section 8 Digital simulated data generation section 9 Time acceleration section 10 Base data section 12 Computer time 13 Analog simulated data generation section

Claims (2)

[Claims] Claim 1: A determination unit installed in a unit computer that monitors and controls a plant, for determining the generation timing of simulated data used for a simulation test of the unit computer; a digital simulation data generation section and an analog simulation data generation section that generate simulation data, and a time acceleration section that accelerates the internal time of the unit computer at the determined generation timing to shorten the time of the simulation test. A unit computer simulator characterized by: 2. The determination unit is connected to an information definition unit that stores determination information and occurrence information of the simulated data, and determines the occurrence timing based on the determination information, and determines the occurrence timing of each simulated data based on the occurrence information. 2. The unit computer simulator according to claim 1, wherein the unit computer simulator determines the occurrence of and acceleration of internal time.