JPS6223320A - Power system monitor/controller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a power system monitoring and control device, and particularly to a power system monitoring and control device equipped with recovery means for overload occurring in the power system.

[Technical background of the invention]

In the power system, due to the occurrence of system accidents, power transmission lines, etc.
Overload may occur on the bus bar, etc., and in such a case, it is necessary to eliminate the overload by some means, such as system switching.

For this reason, conventionally, when an overload on a power transmission line, etc. is detected,
There is a human-based processing method in which operators judge overload elimination operations based on their past experience and operate equipment to eliminate overloads, and other methods use power flow calculations and overload elimination algorithms to eliminate overloads. Methods have been used to calculate operational procedures for solving the problem.

[Problems with background technology]

In the former method described above, the operation method differs depending on the length of experience of the operator, and furthermore, it takes time to determine the solution procedure.

Furthermore, since the process is performed by a human system, there is a possibility that a delay in operation due to a delay in judgment may induce a secondary system accident. Furthermore, since the entire operation is a human-based process, the overload elimination operation is a heavy burden on the operator.

On the other hand, the latter method, for example, "equipment that you do not want to operate"
In cases where there is , the operating procedures are often different from those in actual operation, and are not necessarily widely used.

[Purpose of the invention]

The present invention has been made in order to solve the above-mentioned problems, and it replaces the creation and instruction of overload cancellation procedures with a computer, speeds up the procedure judgment and cancellation operation, maintains the stability of the power system, and The objective is to provide a power system monitoring and control device that reduces the burden on operators.

[Summary of the invention]

In the present invention, the grid connection conditions at the time of an overload occurrence are compared with the current connection conditions, and if they match, the overload cancellation is performed using a pre-registered system corresponding to the grid connection conditions at the time of an overload occurrence. The purpose is to display the operating procedures for the equipment.

[Embodiments of the invention]

Examples will be described below with reference to the drawings. FIG. 1 is a system configuration diagram of an embodiment of a power system monitoring and control device according to the present invention.

This is a power generation substation. Further, 5 is a display device, 6 is a print output device, 7 is an operation console, 8 is an alarm output device, and 9 is an input/output device. And each power generation substation 4 which is the controlled object
The measurement information from 1 to 4n is transferred to the corresponding various measuring instruments 31 to 4n.
3n, and transmits this information to the transmission devices 211 to 211.
input into the computer 1 via 2nn and 21 to 2n,
It also has an overall configuration in which the computer 1 performs calculations, displays and outputs the calculation results, and transmits control outputs to each power generation and substation 41 to 4n. In addition, 11 in the electronic computer 1 is a memory, 12 is an arithmetic control unit,
13 is an interface.

Figure 2 is a diagram explaining the processing functions of the computer 16))
Based on the load status of power transmission lines, busbars, etc. and system equipment information delivered via the remote monitoring and control device 2, various functional processes shown below are performed.

First, the overload monitoring function 121 compares the received load status with internally stored monitoring data, and performs overload detection at regular intervals. 122 is an alarm output function that calls the operator's attention when an overload is detected. Reference numeral 123 displays the overload location detected by the overload status CRT display function on the CRT. 124 is the overload cancellation procedure condition check function.
In response to an overload point instruction from the RT, the current equipment status is compared with the internally stored system connection conditions corresponding to the overload point, and the overload removal for the corresponding point is determined. 12
5 is an overload folding condyle display function that displays the overload elimination procedure obtained in step 124 above on the CRT.

As described above, the burden on operators is reduced by detecting overloads in the power system, outputting alarms, and providing guidance on equipment operations to eliminate overloads.

FIG. 3 is a power system diagram for explaining the present invention in detail. Figure 3 shows substation A (referred to as A2B) to substation G and F.
This is an example of a power system consisting of power plants (hereinafter referred to as F'ps), of which an accident occurs in 13SS, 3CB trips (hereinafter referred to as CB), and Bss
An example will be described below in which the entire load of l csa l Dlil+ is placed on the BE line, resulting in an overload on BE and l.

FIG. 4 is a flowchart illustrating the contents of the calculation process. First, in step 411, information from the power measuring devices of each power generation/substation 41 to 4n is taken in at regular intervals. Stellar f412 compares the amount of electric power taken in in step 411 with the contents of the equipment capacity file shown in FIG. Here, the equipment capacity file shown in FIG. 5 will be explained.

That is, there is a monitoring point name for each management point, and an overload occurrence value and an overload recovery value are stored corresponding to this monitoring point name. In step 413, as a result of the comparison, it is determined whether the captured information is greater than or equal to a predetermined value, and if it is less than or equal to the predetermined value, the process returns to step 411 and the above operations are repeated. If it is determined in step 413 that the value is greater than or equal to the predetermined value, the monitoring point is determined to be an overload occurrence point and the process moves to Stella f414. In this step, in order to alert the operator, an alarm is issued to the alarm output device 8 and, at the same time, a button lamp on the operation console 7 is turned on. At this point, the operator recognizes the occurrence of an overload point by the alarm output and the lighting of the button lamp on the operation console 7. In order to further confirm the overload point, the operator presses the button on the operation console 7 that is lit, and the display is activated. A request is made to the device 5 to display the overload occurrence point. In response to this display request, information on the detected overload occurrence point is displayed as shown in FIG. 6, that is, the name of the occurrence point, the current measured value, and the monitored value. The operator who sees this displayed information uses a light pen connected to the CRT to point to the display section of the overload point in order to obtain equipment operating procedures for recovery from the overload point.

That is, the overload status display function passes information on the point of overload occurrence to the overload elimination procedure condition check function as a management aid. This is step 415.

Step 416 performs a system connection check to determine whether the device operation procedure for overload cancellation stored in the computer can be used, based on the control magnetic field indicating the overload point received from the Stella F415. . That is, based on the delivered management information, the system connection information shown in FIG. 7 is extracted. The extracted system connection information is then compared with the state of the actual system shown in FIG. FIG. 7 shows the system connection states 701 to 708 for the management N'l2. First, the check starts from the part where the condition is BEGIN. Here, as the condition of 701, the designation of Bsl1.30B "off" and the equipment status of the actual system shown in FIG. 3 will be compared. In this case, as shown in Figure 3, 3C of B8111
Since B is "off", it is determined that the condition is satisfied. 7
Since the condition 01 is satisfied, the condition 702 is checked next. In this case, the conditions of 702 are AND, Bsg,
4CB.

Become a person and b. The condition specification melon is 701 condition and 702
This means that the condition is the piece condition. Third
As shown in the figure, the real system Bss, 4CB
is "on", so the condition 702 is also satisfied. Similarly, 703 and 704 are sequentially applied to the management N12.
．． ...Proceed until 708 and the condition specification becomes END. In this way, when all the conditions are met, it is determined that the overload elimination measures can be applied to the overload occurrence point. This is determined in step 417,
If the condition is satisfied, the process moves to step 418, where the corresponding procedure corresponding to the management request is extracted from the operating procedure file shown in FIG. 88 and displayed on the display device 5 as shown in FIG. Here, there are three types of display data: title data, procedure data, and comment data, and one comment data is provided for one procedure data. Furthermore, it is possible to specify when to output the procedure data and comment data.

If the determination is not established in step 417, an indication of failure is displayed.

Further, each of the above-mentioned data is processed as follows and displayed on the screen.

That is, as shown in FIG. 8, data 801 is unconditionally handled as the first data of the procedure data as a title, and the data is displayed as is on the screen.

Since 802 is designated as a comment, it is thereafter determined to be character data and displayed on the screen as is. 8
03 is a procedure specification, so the name of the electrical facility, equipment name,
Consists of operation direction and comments. Therefore, the electrical location name, equipment name, and operation direction specifications are converted into text data and displayed on the screen, and comments are text data, so they are displayed as they are.

Thereafter, the above process is repeated for each hand JP data corresponding to the management request, and the screen shown in FIG. 9 is displayed.

Then, the operator confirms the operating procedure for overload cancellation displayed as shown in FIG. 9, and determines whether or not to perform the operation. To execute the resolution operation, an operator uses a CRT for operating the equipment or a console for operating the equipment, and performs the corresponding operation via the remote monitoring and control equipment 2 shown in Fig. 1 according to the operating procedure displayed on the display device. The operator sequentially issues operation requests to the equipment control device 3 that performs the operations.

〔Effect of the invention〕

As explained above, according to the present invention, the computer is configured to automatically perform overload detection, alarm output for overload occurrence, and guidance for equipment operation to eliminate overload, so that system It is possible to provide a power system monitoring and control device that can speed up operations for monitoring and restoration, provide a stable supply of power, and reduce the burden on operators.

[Brief explanation of the drawing]

FIG. 1 is a system configuration diagram of an embodiment of the power system monitoring and control device according to the present invention, FIG. 2 is a diagram illustrating processing functions of a computer, and FIG. 3 is an example diagram of a power system explaining the operation.
Figure 4 is a flowchart explaining the calculation processing contents, Figure 5
Figure 6 is a configuration diagram of an equipment capacity file, Figure 6 is an example of a CRT display used to notify operators of overload occurrence points, Figure 7 is a configuration diagram of a system connection condition file, and Figure 8 is a configuration diagram of a system connection condition file. FIG. 9 is a diagram illustrating the configuration of the overload elimination operation procedure file, and is an example of a display displayed on a CRT to provide guidance to an operator about the contents of the overload elimination operation procedure file. 1...Electronic computer, 11...Memory, 12...
・Calculation control unit, 13...interface, 2.
... Distant monitoring and control device, 3... Measuring instrument, 4... Controlled power generation/substation, 5... Disdelay device, 6... Print output, 7... Operation console, 8... Obituary information Output device (direct, 9... input/output device.

Claims (1)

[Claims] In a power system monitoring and control device that detects the overload state of the power system that occurs at the time of an accident and performs overload removal operations, the tidal current value taken from the power system and the judgment value for the system stored in the computer are used. A means for comparing, a means for outputting an alarm when the power system is overloaded, and a comparison between the current system connection conditions and the system connection conditions at the time of overload that are stored in advance in the computer for the relevant power transmission line. The present invention is characterized by comprising: a device operating procedure for resolving overload that is registered in advance in accordance with grid connection conditions when an overload occurs; and a display device that displays the device operating procedure. Power system monitoring and control equipment.