JPH03270653A - Monitoring equipment for electric power system - Google Patents

Abstract

PURPOSE:To have an operator precisely and quickly judge status of an electric power system by providing a memory unit, a database of an electric power system installation, and a rule-base and an inference mechanism for an alarm information feedback from the electric power system, in a digital computer for monitoring the electric power system. CONSTITUTION:An inference mechanism 32 groups for each electric power system installation by using an installation database 33 and a rule of a rule-base 34. The inference mechanism 32 summarizes an alarm information of machines operated in relation to the alarm information within each divided group by using the installation database 33 and the rule of the rule-base 34. The inference mechanism 32 summarizes alarms related or duplicated among the alarm information summarized for each group by using the installation database 33 and the rule-base 34.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a power system monitoring device, and particularly to a power system monitoring device that monitors the power system while constantly inputting the state of the power system as information.

The present invention relates to a power system monitoring device that outputs information as an alarm when an accident occurs in the power system.

(Prior Art) Conventionally, a wide variety of information regarding the power system that is input when an accident occurs in the power system has been presented to the operator via an output device in the order in which it was input, without making any causal relationships between the information. I was doing it.

(Problem to be solved by the invention) In this way, in conventional devices, a large amount of information is presented without any correlation to each other, and the amount of alarm information that can be output on one screen is limited. As a result, it was difficult to accurately and quickly determine the location of an accident that occurred in the power system and the impact of the accident.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a power system monitoring device that allows an operator to accurately and quickly judge the status of the power system.

[Precepts of invention]

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a storage device in a digital computer that monitors the power system by inputting information such as the on/off state and operating state of each device in the power system. , a database regarding power system equipment, a rule base and an inference mechanism regarding alarm information from the power system are provided, the alarm information is grouped, causal relationships are established, and the alarm information is aggregated and output. be.

(Operation) When information from the power system is input and written to the storage device, the inference mechanism selects a rule that satisfies the conditions from the rule base based on the information in the storage device and the equipment database regarding the equipment that makes up the power system. As a result, the alarm information is grouped, aggregated, and output to an output device. At this time, information that does not match the condition part of the rule is not processed as alarm information and is deleted.

(Example) Examples will be described below with reference to the drawings.

FIG. 1 is a configuration diagram of an embodiment of a power system monitoring support device according to the present invention.

In Figure 1, 1 is the power system, which represents the current.

Detectors such as CT and PT that detect electrical data such as voltage, circuit breakers, disconnectors, re-closing devices, protective relays, transformers,
It consists of equipment such as tracks and busbars.

2 is an input device for inputting power system information, 3 is a digital computer, and a storage bag w31. It is composed of an inference mechanism 32, an equipment database 33, and a rule base 34. 4 is a CR for outputting aggregated alarm information
This is an output device such as a T or a printer. The storage device 31 stores information such as the on/off status and operating status of each device in the power system 1. The inference mechanism 32 is a memory bag! 31 contents, equipment database 33 contents, and rule base 3
4, and selects a rule whose condition part matches. The equipment database 33 stores fixed data such as installation locations of relays, transformers, etc. that make up the power system, connections of power system equipment such as buses, power transmission lines, and CBs, and voltage classes of the buses. The rule base 34 stores knowledge for aggregating alarms.

FIG. 2 is a flowchart conceptually showing the flow of processing contents. First, alarm information input from the input device 2 is input to the storage device 31 of the digital computer 3. First, in step S21, the inference mechanism 32 uses the equipment database 33 and the rules of the rule base 34 to perform grouping for each power system equipment.

Next, in step S22, the inference mechanism 32 aggregates the alarm information of the devices that have operated with respect to the alarm information in each group, using the rules of the equipment database 33 and the rule base 34.

In step 823, the inference mechanism 32 uses the inference mechanism 32 to check the equipment database 33 for alarms that are related or duplicated among the alarm information aggregated for each group nib.
Aggregation is performed using the rules of the rule base 34.

Then, in step S24, the inference mechanism 32 performs step S22. The result of S23 is output to an output device 4 such as a CRT or a printer.

Next, the operation of the embodiment will be specifically explained using the power system diagram of FIG. 3 and an example of an accident in one power system and an example of its alarm information.

The symbols appearing in the figures from FIG. 3 onwards have the following meanings.

A”/B, B S/s CS/S, Ds15 CBol, CBO2゜ Tl, T2, -,,,,,,,,.

PI DF MSI, MS2゜MGl, MG2-, -3 A substation, B substation C substation, D substation Breaker number Transformer number Busbar protection relay Transformer protection relay Transmission line short circuit Main protection relay Transmission line Earth fault main protection relay (accident example) Now, the ASs busbar, T3 transformer, cS/S and D
Simultaneously or around the same time, an accident occurred on two power transmission lines, glL and 2L, connecting between 84 and 2L (indicated by J mark in the diagram) Fl.

F2. Suppose that F-9F* occurs, the protection relay operates as shown below, and the CB is cut off (indicated by the X mark in the figure).

Furthermore, it is assumed that the operation information of the undervoltage relays (hereinafter referred to as UV) installed on the A bus and B bus of A S/, 5, the B bus of B S7s, and the A bus and B bus of DS/S are input. do.

Accident F1 explained above. When F, . . . F4 occurs, alarm information as shown in FIG. 4 is input from the power system 1 to the digital computer 3.

Here, the first line ■ in Figure 4 indicates that the As/S BPI is operating, the seventh line ■ indicates that the AS/S CBOL is tripped, and the 17th line O indicates that the A S/
This means that the UV installed on the A bus of S is operating.

In step S21 of FIG. 2, such inputs are grouped by power system equipment using rule group A shown in FIG. FIG. 6 shows alarm information grouped according to FIG.

In FIG. 6, (a) is from Ha A-2 and &A-4 of rule group A, and (b) is from NaA-3 of rule group A.
(c) and (d) are the alarm information grouped from NcA-1 of rule group A, and (e), (f), (g), and (h) are the alarm information grouped from NQA-4 of rule group A, respectively. be.

Next, in step S22 in FIG. 2, each grouped alarm information from (a) to (h) in FIG. 6 is aggregated with respect to devices that operated using rule group B shown in FIG. .

FIG. 7 shows a summary of alarm information within each group. Using &B-1 to NaB-4 of the rule example, the second
The contents of step S22 in the figure will be explained.

First, regarding group (a) in Figure 6, all CBs connected to the A bus of AS/s are tripped due to NcB-1 of rule group B in Figure 7, so (
al). Group (b) in Figure 6 is a CB connected to the T3 transformer according to &B-3 of rule group B.
Since all are tripped, (bl) in Figure 8
It is aggregated as follows. Similarly, alarm information (C) and (d) in FIG. 6 are set according to rule NnB-2 and (
e).

(f), (g), and (h) are (c 1), (d 1), (e 1), and (f
1), (g1).

(hl).

FIG. 9 shows an example of a rule for aggregating mutually related alarm information between groups. Lurp (a 1),
The explanation starts from (b1). Rule group C has (a 1)
, (b1) is not aggregated because there is no corresponding rule. Therefore, (al) is (a2), (bl) is (b
2). Next, groups (cl) and (dl) are aggregated as shown in FIG. 11 (c2) because all the CBs of the two parallel lines are tripped due to Na C-2 of rule group C. (el).

(f 1) and (h 1) are aggregated as shown in (d2) using rule NaC-1 and data regarding voltage classes in the equipment database 33. FIG. 1O shows an example of voltage classes in the equipment database. (g
1) is deleted according to rule &C-3.

In step S24 of FIG. 2, the alarm information of FIG. 4 is summarized in step S23, which is shown in FIG.
Output the alarm information of (d2). As a result, FIG. 11 (a2) to (d2) are displayed on the output bag [4].

〔Effect of the invention〕

As explained above, according to the present invention, based on the information input from the power system, the inference mechanism uses a rule base regarding alarm information to group and aggregate alarm information and present it to the operator. Therefore, the operator can accurately and quickly judge the accident status of the power system.

[Brief explanation of drawings]

FIG. 1 is a block configuration diagram of an embodiment of the power system monitoring device according to the present invention, FIG. 2 is a flowchart explaining processing contents, FIG. 3 is a diagram explaining the power system, and FIG. 4 is an alarm for an accident example. Output contingencies, Figure 5 shows the rules for grouping alarm information, how many times, Figure 6 shows the contingencies for grouping alarm information, 7th Wi shows the rules for aggregating alarm information in groups, how many times, and Figure 8 shows the rules for grouping alarm information. Figure 9 shows the contingencies of alarm information aggregated within a group, how many times are rules for aggregating alarm information between groups, and Figure 1O shows contingencies related to voltage classes in the equipment database. Figure 11 shows the alarm information contingency that aggregates alarm information between groups6.

Claims (1)

[Claims] In power system monitoring equipment that monitors the power system based on information from the power system and outputs alarm information when an accident occurs,
A storage device that inputs and stores information such as the on/off status and operating status of each device that makes up the power system, an equipment database that stores equipment data of the power system, and stores rules regarding alarm information from the power system. A rule base to
What is claimed is: 1. A power system monitoring device comprising: an inference mechanism; the device divides the alarm information into groups and aggregates and outputs the alarm information of each group.