KR20120052084A - Control system for supplying load of power faciliity automatically using logic circuit and the method thereof - Google Patents

Abstract

PURPOSE: A power transformer automatic load supply controlling system and method are provided to increase working efficiency of a power feed branch worker taking charge of a plurality of unmanned facilities by automatically converting load. CONSTITUTION: A malfunction event generation is detected(310). The attribute of a malfunction event is determined(320). A control signal for load conversion is generated(330) in case the malfunction event is internal malfunction of a transformer. Electrostatic load is automatically restored by converting load according to the control signal(340). The control signal automatically restores the electrostatic load through close and open commands of a set auto-restoring object device. The auto-restoring object device is selected, changed, and controlled by a user. The auto-restoring object device comprises a section circuit breaker and a bus-tie circuit breaker.

Description

CONTROL SYSTEM FOR SUPPLYING LOAD OF POWER FACILIITY AUTOMATICALLY USING LOGIC CIRCUIT AND THE METHOD THEREOF}

The present invention relates to an automatic load supply control system and method for power equipment using a logic circuit, in particular, automatic load supply control system for automatically recovering the electrostatic load by performing a load switching system when a transformer internal failure occurs; It's about how.

Standard 154kV unmanned substations operated by KEPCO generally consist of two or more banks and a number of 23kV distribution lines (hereinafter referred to as 'D / L') and are supplied by double buses.

These unmanned substations use a power remote monitoring and control system (SCADA) to monitor and control a large number of facilities by a small number of specialized personnel, and to remotely monitor and control field devices in remote areas at a number of power supply stations and distribution centers. have.

On the other hand, the number of transmission substation equipment failures continues to occur every year, and the blackout time that occurs during unmanned substations and simple substation repair operations is being improved by the operator's specialization. However, breakthroughs are not easily achieved due to various limitations.

Therefore, the recovery operation according to the simple failure such as the internal failure of the transformer is required to study to increase the work efficiency by systemic automatic processing without the manual operation of the user.

The present invention provides an automatic load supply control system and method for determining a failure attribute of a power device and automatically recovering an electrostatic load by automatically performing load switching when it is determined that the transformer is broken internally.

The present invention is an automatic load supply control system that can increase the work efficiency of the power distribution center workers to manage a number of unmanned equipment by automatically performing load switching in the case of a transformer internal failure and reduce the risk of misoperation during recovery operation; Provide a method.

Automatic load supply control method according to an embodiment of the present invention, the step of detecting the occurrence of a failure event, determining the nature of the failure event, when the failure event is a transformer internal failure, load to another predetermined transformer Generating a control signal for switching and performing load switching according to the control signal to automatically recover the electrostatic load.

According to one aspect of the invention, the step of determining the nature of the failure event, the failure event is a transformer inside the transformer through a logic circuit using the monitoring information data of the relational database system converting the file-type database of the host server server into a relational database Determine if there is a malfunction.

According to an aspect of the present invention, the control signal may be a control signal for automatically recovering the electrostatic load through a close or open command of a predetermined automatic recovery target device.

According to an aspect of the present invention, the automatic recovery target device may be selected, changed, and controlled by a user.

According to an aspect of the present invention, the automatic recovery target device may include a bus segment breaker (Section CB) and a bus connection breaker (Bus-Tie CB).

The automatic load supply control system through a logic circuit according to an embodiment of the present invention, the state information database of the on-site power equipment holding the state information database and the state information database of the main device server to control the on-site power equipment as a relational database And a relational database server for determining a transformer failure and generating control signals for automatic recovery of power failure.

According to an aspect of the present invention, the relational database server, when a failure event occurs, the failure determination unit for determining the nature of the generated failure event and, if the failure event is the internal failure of the transformer, automatically to another preset transformer It may include a control signal generator for generating a control signal for switching load.

According to an embodiment of the present invention, an automatic load supply control system and method for determining a failure attribute of a power device and automatically recovering an electrostatic load by automatically performing load switching when it is determined that the transformer is internally broken is provided. .

According to one embodiment of the present invention, in the case of a transformer internal failure, the load switching is automatically performed to increase and increase the work efficiency of the power distribution office workers who control a plurality of unmanned facilities and to reduce the risk of incorrect operation during recovery operation. An automatic load supply control system and method are provided.

1 is a view showing the configuration of an automatic load supply control system according to an embodiment of the present invention.
2 is a diagram showing the configuration of the relational database server shown in FIG.
3 is a flowchart illustrating an automatic load supply control method according to an embodiment of the present invention.
4 is a view for explaining a load switching process when a transformer failure according to an embodiment of the present invention.
5 is a diagram illustrating a control logic circuit for determining an internal failure of a transformer according to an embodiment of the present invention.

Hereinafter, with reference to the contents described in the accompanying drawings will be described in detail the embodiments of the present invention. However, the present invention is not limited to or limited by the embodiments. Like reference numerals in the drawings denote like elements.

1 is a view showing the configuration of an automatic load supply control system according to an embodiment of the present invention.

Referring to FIG. 1, the automatic load supply control system 100 includes a host server 110 and 120, a relational database server 130, and an input / output device 140.

The main server 110, 120 maintains a database of status information of the site power equipment and controls the site power equipment. That is, the main server (110, 120) is a server for receiving and executing the monitoring, control status information of the field device can hold the state information of all the devices in the field.

The relational database server 130 may convert the state information databases of the main server 110 and 120 into a relational database, determine a transformer failure, and generate a control signal for automatic recovery of power failure. That is, when a failure event of the device occurs, if the failure of the device is found to be an internal failure of the transformer, the control signal is transmitted so that the user can perform automatic recovery instead of performing automatic recovery of the power failure by manually changing the load. Can be generated. Here, the relational database server 130 will be described in more detail below with reference to FIG. 2.

FIG. 2 is a diagram illustrating the configuration of the relational database server shown in FIG. 1.

Referring to FIG. 2, the relational database server 130 may include a failure determiner 210 and a control signal generator 220.

When a failure event occurs, the failure determination unit 210 may determine the property of the generated failure event. For example, it may be determined whether the failure event is a transformer internal failure alone, an external complex failure failure, or an additional failure of other equipment. At this time, the attribute determination of the failure event may have a separate control logic for determining the failure, and may determine whether the transformer alone is internally broken through the control logic.

The control signal generator 220 may generate a control signal for automatic load switching to another preset transformer when the failure event is an internal failure of the transformer. That is, in the case of an internal failure of the transformer, the power failure recovery may be performed by switching the load, and the user may generate a control signal for automatically performing the load switching instead of performing the load switching manually.

The input / output device 140 may perform input / output of the main device server (110, 120) and input and output the field device status information stored in the file type database in the main device server (110, 120) (symbol), character It can be changed to (text) and displayed on a monitor (display) to directly control and monitor field devices.

As described above, in the SCADA (Supervisory Control And Data Acquisition), in the case of a transformer internal failure, the recovery method is using a bus breaker (Section CB) and a bus tie breaker (Bus-Tie CB) Switching loads to other transformers is a common recovery method. Therefore, in the event of a transformer internal failure, the load switching can be automatically performed so that rapid response to a failure can be made.

3 is a flowchart illustrating an automatic load supply control method according to an exemplary embodiment of the present invention.

Referring to FIG. 3, the automatic load supply control method may detect the occurrence of a failure event in step 310. For example, when a failure event occurs during operation of the power remote monitoring control system in step 310, the occurrence of the failure event may be recognized and information on the failure event may be obtained.

In operation 320, an attribute of the failure event may be determined. When the occurrence of the failure event is recognized in the above, it is possible to determine a property of which failure is caused by the failure event. For example, it may be determined whether the failure event is a transformer alone internal failure, an external complex failure, or an additional failure of other equipment.

In operation 330, when the failure event is an internal failure of a transformer, a control signal for switching loads to another predetermined transformer may be generated. In other words, when the fault event is a fault inside the transformer, the fault recovery method is almost standardized by automatically restoring the electrostatic load by performing load switching through a close or open command of a predetermined automatic recovery target device. Therefore, in this case, load switching can be automatically performed. Here, the automatic recovery target device may be selected, changed, and controlled by the user, and may include a bus breaker (Section CB) and a bus breaker (Bus-Tie CB).

In operation 340, the load switching may be performed according to the control signal to automatically recover the electrostatic load. That is, by performing the load switching through the close (close) or open (open) of the predetermined automatic recovery target device, it is possible to automatically recover the electrostatic load.

As described above, the recovery operation according to the simple failure, such as the internal failure of the transformer, by adding a separate control logic for automatic operation by automatically issuing a recovery operation command in the event of a simple failure (ex. Can reduce the power outage time from minutes to seconds.

In addition, this can reduce the heavy duty of operation for power supply branch workers in charge of a number of unmanned facilities, reduce the risk of misoperation during recovery operation, and concentrate the workforce on high-level complex and busbar failures. Can be planned.

4 is a view for explaining a load switching process when a transformer failure according to an embodiment of the present invention.

Referring to FIG. 4, when a failure occurs in the first transformer 410, the primary circuit breaker CB and the secondary circuit breaker CB may be opened. In this case, when the failure of the first transformer 410 is an internal failure of the transformer, the automatic recovery target devices (BUS-SEC CB 430 and BUS-TIE CB 440) are closed to close the second transformer 420. By switching the load to), it is possible to supply the load to the distribution line (D / L) of the blackout bank.

That is, in case of a transformer internal failure, the user does not manually process the process of performing the power failure recovery by inserting or opening the automatic recovery target device, but implements the system automatically, thereby reducing the time required for power failure recovery. have.

5 is a diagram illustrating a control logic circuit for determining an internal failure of a transformer according to an exemplary embodiment of the present invention.

Referring to FIG. 5, in the case of an internal failure of a transformer alone, transformer 1 due to the operation of an electrical protection device (96P, 96D, 96T event) or mechanical protection device (87 event) and 86T (lock out) interlocked with the transformer. When the secondary circuit breaker operates, it may be recognized that an internal failure of the transformer alone occurs.

The relational database server receiving the protection device operation event data recognizes that an internal failure of the transformer occurs when the protection device operation event occurs, and in this case, the automatic recovery control logic procedure proceeds. In addition, if the external complex failure such as operation of 51S, 51SN relay, additional transformer or other equipment occurs, the automatic recovery procedure does not proceed if the individual failure condition is not met. Follow the recovery operation through the Man-Machine Interface.

That is, the OR circuit 510 of FIG. 5 receives an electrical protection device (96P, 96D, 96T event) operation of a transformer, and the AND circuit 520 receives an operation of the electrical protection device and an 86T (lock out) associated with the operation. Transformers 1, 2, and 2 are operated by AND.

 In the AND circuit 530, the first and second transformer breakers due to the operation of the mechanical protection device 87 event and the 86T (lock out) interlocked with the operation are inputted as AND, and the output of the AND circuit 530 and the AND circuit. The output of 520 is input back to the OR circuit 550.

On the other hand, the NOR circuit 540 prevents the automatic recovery logic from proceeding in the case of a transformer secondary bus fault and a complex failure, and the NOT circuit 560 prevents the automatic recovery logic from proceeding to the failure of other equipment.

Accordingly, the output of the OR circuit 550, the NOR circuit 540, and the NOT circuit 560 is input to the AND circuit 570 so that the automatic recovery logic can be performed when all conditions are satisfied. .

As a result, according to the control logic, in order for the automatic recovery logic to be performed, one of the operation of the electrical protection device and the operation of the mechanical protection device must be performed, and the transformer secondary bus failure, complex failure, or other equipment failure should not occur. do.

As described above, a separate control logic is provided to determine whether the transformer is a simple failure, and as a result of the determination, in the case of an internal failure of the transformer, the load switching is automatically performed by inserting or opening a pre-stored automatic recovery target device. Therefore, in the event of a simple failure such as a transformer internal failure, a rapid power failure recovery can be achieved.

In the above description, one embodiment of the control logic has been described, and it is obvious that various kinds of failures can be automatically recovered according to the implemented control logic.

In addition, the automatic load supply control method according to an embodiment of the present invention includes a computer readable medium including program instructions for performing various computer-implemented operations. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. The media may be program instructions that are specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like.

Although one embodiment of the present invention as described above has been described by a limited embodiment and drawings, one embodiment of the present invention is not limited to the above-described embodiment, which is a general knowledge in the field of the present invention Those having a variety of modifications and variations are possible from these descriptions. Accordingly, one embodiment of the invention should be understood only by the claims set forth below, all equivalent or equivalent modifications will be within the scope of the invention idea.

110: main unit server (main server) 120: main unit server (spare server)
130: relational database server 140: input and output devices
210: failure determination unit 220: control signal generation unit

Claims (7)

Detecting a failure event occurrence;
Determining an attribute of the failure event;
Generating a control signal for switching a load to another predetermined transformer when the failure event is a failure in a transformer; And
Restoring the electrostatic load by performing load switching according to the control signal;
Automatic load supply control method comprising a. The method of claim 1,
The determining of the nature of the failure event,
And determining whether the failure event is an internal failure of a transformer through a logic circuit using monitoring information data of a relational database system that converts a file type database of a host server into a relational database. The method of claim 1,
The control signal is,
And a control signal for automatically restoring the electrostatic load through a close or open command of a predetermined automatic recovery target device. The method of claim 3,
The automatic recovery target device,
Automatic load supply control method characterized in that the selection, change and control by the user. The method of claim 3,
The automatic recovery target device,
An automatic load supply control method comprising a bus line breaker (Section CB) and a bus line breaker (Bus-Tie CB). A main device server having a state information database of an on-site power facility and controlling the on-site power facility; And
The relational database server converts the state information database of the main server into a relational database, determines a transformer failure, and generates a control signal for automatic recovery of power failure.
Automatic load supply control system comprising a. The method of claim 6,
The relational database server,
A failure determination unit determining a property of the generated failure event when a failure event occurs; And
If the failure event is a fault inside the transformer, a control signal generator for generating a control signal for automatic load switching to another predetermined transformer
Automatic load supply control system comprising a.

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