JPH01238426A - Electric power system supervisory device - Google Patents

Abstract

PURPOSE:To inform an operator of wrong information with a decision on whichever information provides an error by outputting the information in case of information on equipment, constituting an electric power system, not satisfying a relation to be satisfied by the information of the electric power system. CONSTITUTION:Information of real time (measured value and binary information) and information, relating to connection of equipment of an electric power system, are input to a data base 3 through an input device 1. While a relation, satisfied by the electric power system, is stored as the knowledge in a knowledge base 5. An inference engine 4 checks the information of the data base 3 for whether it satisfies knowledge relating to the electric power system of the knowledge base 5. Now when even only one error is provided, the error information is corrected, further generation of the error in the information is presented to an operator.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention relates to an alpha power system monitoring device, in particular, which monitors the power system while constantly inputting the state of the power system as information, and transmits the monitoring results to the power system. The present invention relates to a power system monitoring device that presents a status to an orator.

(Prior art) Figure 7 shows an example of the configuration of a conventional power system monitoring device. It has a configuration in which binary information such as the on/off status of the device is imported into the computer 2 via the input device [1] and displayed as is as operating information of each device stored in the database 3. Was. An example of display in this case is to display each compatible device with a different symbol on the system diagram shown in FIG. FIG. 9 shows an example of the configuration of another conventional device. In this case, a calculation method called state estimation 7 is used to calculate measurement information and binary values. # It has a structure that verifies information and corrects incorrect information.

In addition, the literature regarding state estimation is as follows: There is.

(Problem to be Solved by the Invention) The former method described above displays the 7″-data input from the power system as it is, so faulty on-site measuring instruments, faulty relays, and faulty transmission lines are the most likely causes. In some cases, the measured value was different from the actual value or condition.In addition, the displayed state of the switch and the condition of the equipment at the site were sometimes different.This is shown in the example shown in Figure 8. To explain, originally, CB4 is 1-cut and has to be cut by 6 small or 1 person. Therefore, CB3 is "off" and the B bus is "stopped", and CB4 is "on" and the B bus is "stopped".
An incorrect status is displayed where the voltage value of the bus bar is OkV. This is because there was an error in the input data of CB4.

In such cases, operators may misunderstand the status of the power system,
Notifying the relevant parties of incorrect information, or even causing a power outage due to incorrect operation due to incorrect understanding of the system.
Furthermore, there were times when equipment at the site was damaged. Furthermore, the latter requires a large program for processing, and has the disadvantage that the time and computer load required for execution are extremely large.

The present invention has been made in view of the above circumstances, and when input switch information contradicts other system information, it notifies the operator to that effect and identifies which information is incorrect. The purpose is to provide a power system monitoring device that can make decisions and provide notifications.

[Structure of the Invention] (Means for Solving the Problems) In the present invention, a first
a second means for storing in advance a relationship that should be satisfied by an electric power system accident as knowledge; and a third means for checking whether the first means satisfies the knowledge of the second means. In addition, if the information of the first means does not satisfy the knowledge of the second means, the information is output.

(Function) Checks whether the input information from the power system satisfies the knowledge within the knowledge pace.

That is, it checks whether the input information satisfies the condition part and the conclusion part at the same time, and if there is only one error, the erroneous information is corrected and the operator is informed accordingly.

If a single error cannot be identified, all the information written in the condition part and conclusion part of the knowledge that satisfies the condition part but does not satisfy the conclusion part is displayed as suspicious information with a possibility of error.

(Actually if! IN) Examples will be described below with reference to the drawings.

FIG. 1 is a functional block diagram of an embodiment of a power system monitoring device according to the present invention. In FIG. 1, the same parts as in FIG. 7 are given the same reference numerals.

The database 3 consists of real-time information (measured values and binary information) input via the input device 1 and information regarding connections of equipment in the power system.

The inference engine 4 checks whether the information in the database satisfies the knowledge regarding the power system, and if it does not satisfy the knowledge, identifies incorrect information. The knowledge base 5 stores relationships that should be satisfied by the power system as knowledge.

In short, the relationships that should be satisfied regarding the power system information are stored in advance as knowledge in the knowledge page, and it is checked whether the input information from the power system satisfies the condition part and the conclusion part at the same time. At this time, if there is only one error, the incorrect information is corrected and the operator is informed that there is an error in the information. If a single error cannot be identified, all information written in the condition part and conclusion part of the knowledge that satisfies the condition part but does not satisfy the conclusion part is presented to the operator as suspicious information that may be incorrect. and call for attention.

Figure 3 is a storage state diagram of real-time information in the database, including charging, power outage status and voltage values for each bus bar (A, B, C), charging, power outage status and power flow values for each power transmission line (LL, 2L). , the off state of each circuit breaker (CBI to CB6) is shown correspondingly.

FIG. 4 is a storage state diagram of information related to equipment connections in the database, and connected equipment is written corresponding to each equipment. Incidentally, it is shown in the first line (A bus adjacent equipment - C
BI, CB2) means that the adjacent equipment connected to the A bus has the interrupters CBI and CB2. Thereafter, the explanation is omitted because the interpretation is the same.

FIG. 5 is an example diagram of the knowledge pace, in which the relationships that the power system should satisfy are divided into a condition part and a conclusion part, and are shown correspondingly. In Figure 5, there are six pieces of knowledge.

Next, the processing contents of the inference ennon will be explained using the flowchart in Figure 2. Considering the power system status shown in Figure 6, it is assumed that CB4 was "off" at the site in the 66 kV thread system. Suppose that something is mistakenly entered into a computer as "r people". However, in Figure 6, CB
It was concluded that ``ON'' of No. 4 was an error, and CB4 is now in the ``OFF'' state, which is the corrected state.

First, Stella fs 21 checks the condition part of knowledge. Therefore, apply the knowledge in 1. A bus is 66 kV
Since the voltage is 70% or more of , the condition part is satisfied. Therefore, the process in step 823 is performed based on the determination in step S22. In this case, regarding the conclusion part of knowledge 1,
The A bus is satisfied because the voltage relay is ONJ.As for other information, AI STETSUNO 821, 82
When the process of 2,823 is performed, the condition part and the conclusion part of the knowledge of 1 are simultaneously satisfied for the C bus. Step 826
With this determination, the process returns to Stella 7° S21, but the processes from Step 7'821 to Step S25 are performed again for the second and subsequent knowledge.

17 Regarding the second knowledge, the B bus satisfies both the condition part and the conclusion part. Regarding the third knowledge, power transmission line 2
The interrupter CB4 satisfies the conditional part, but the conclusion part is not satisfied because the B bus connected to 2L via CBJ is out of power. Therefore, in the process of step 825 (2L-
Charging), (CB4-person), and (B bus-power outage) are stored as error information. Regarding the fourth knowledge, if the condition part is satisfied, the conclusion part is satisfied. That is, if (A bus - charging) and (CBI - person), then (IL - charging) (A
If (CB2-people) at (bus line - full t), then (2I4-full t)
) (C bus - charge'a) and (CBS - person) if (IL
- charging) (C bus - charging, if (CB6 - people), then (
2L-Ku' Ward). However, regarding the fifth and sixth knowledge, there is nothing that satisfies the conditional part. At Stella fs27, it is determined that erroneous information is stored, so the process proceeds to Stella fs29. In step S29, it is assumed that there is an error in one piece of information, that is, the information on (2L-charging) is incorrect and the information on (2L-charging) is incorrect.
Assume that there is a power outage). Then, examine the following knowledge in order. However, in the 74th knowledge, the condition part of "A bus is charging and CB2 connected to the Alu line is on" is satisfied, but the conclusion part is not satisfied because it is assumed that r2L is out of power. Therefore, based on Stella FS36's judgment, Stenoa'S 29
Decided to. In this case, even if there is an error in the information of ``rcB4-person'' among the information saved in step 825,
(CB4-off) is assumed. Then, in the Stella fS30, we start with the first piece of knowledge and investigate it in the same way as above. In this case, . As a result of the above, the process proceeds to step S15 based on the judgment in step 816, and the information of (CB4-person) is
CB4-off) to correct (～, (CB4-person)'s information (
CB4-off) is corrected, and the fact that there is an error in the information of (CB4-person) is presented on the output device. FIG. 7 shows an output example. Note that after checking all the information in the Stella f836, all the information is displayed as suspicious information on the output device. The output example at this time is as shown in Figure 6, (CB4-
person) is displayed as incorrect information. That is, (CB4-person)
Since there is an error in the information, that fact will be displayed.

〔Effect of the invention〕

As explained above, according to the present invention, the relationship between the power system switch and measurement value information is stored in advance in the knowledge pace, and each of these pieces of information does not satisfy the relationship of the knowledge pace. In this case, it is determined that there is an error in one of the pieces of information, and the discrepancy is reported, making it extremely easy to check the difference between the switch information and the measured value information.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram of an embodiment of the 'rectangular system monitoring device according to the present invention, FIG. 2 is a flowchart showing the processing contents of the inference ennon, and FIG. 3 is a diagram showing the storage state of real-time information in the database. Fig. 4 is a diagram showing the storage state of information regarding equipment connections in the database, Fig. 5 is a diagram showing knowledge in the knowledge base, Fig. 6 is a display example according to the present invention, and Fig. 7 is a diagram of the conventional device. FIG. 8 is a diagram showing a display example of a conventional device, and FIG. 9 is a diagram showing another configuration of the conventional device.

Claims (1)

[Claims] In a power system monitoring device that constantly collects power system information and determines and displays faulty equipment in the power system based on that information, a first means for storing information on equipment constituting the power system; a second means for accumulating knowledge in advance of a relationship that the system information should satisfy; and a third means for checking whether or not the first means satisfies the knowledge of the second means; An electric power system monitoring device characterized in that when the information of the means does not satisfy the knowledge of the second means, the information is output.