KR20220127211A - Diagnostic apparatus for protection and distribution board - Google Patents

Abstract

Disclosed is a protective distribution board diagnosing device. According to the present invention, the protective distribution board diagnosing device comprises: an input/output module configured to provide an interface with a protective distribution board; and a control unit configured to manipulate at least one of a circuit breaker or a disconnector in a standard single line diagram of the protective distribution board through the input/output module to determine whether it is a normal system driving condition state, transfer a malfunction signal to the protective distribution board if it is the normal system driving condition state, and display operation state information of the protective distribution board transferred from the protective distribution board through a display unit.

Description

DIAGNOSTIC APPARATUS FOR PROTECTION AND DISTRIBUTION BOARD

The present invention relates to a protective switchboard diagnostic device, and more particularly, to a protective switchboard diagnostic device for verifying the performance state of the protective switchboard through simulation.

In general, the protective switchgear is a device used to directly monitor and control transmission and substation facilities. The protective switchgear is equipped with a protection relay that responds to a failure occurring in the transmission and substation facility through input of a current transformer (CT), a potential transformer (PT) and other contact elements, and instructs to separate the failure section.

The protection switchgear supplies power to various transmission and substation facilities stably, and when abnormal conditions such as surge, overvoltage or overcurrent occur, the power supply is cut off to prevent damage to various power facilities connected to the protection switchboard.

As described above, the protective switchgear always detects whether an abnormality occurs in the power system of the power generation/substation and transmission/reception facility, and has the advantage of enabling immediate action when an abnormality occurs in the power system within the power generation/substation or transmission/reception facility. However, if the monitoring operation cannot be performed properly due to the occurrence of a fault in the protection switchboard itself, it may provide a cause that may cause more serious problems. Therefore, it is necessary to periodically check whether the protective switchboard operates normally.

Conventionally, regular and temporary operation check tests are performed to maintain self-performance, such as changing the characteristics of the protection switchboard once every quarter or from time to time for each power plant/substation or power system facility to check whether the protective switchboard is in normal operation.

The background technology of the present invention is disclosed in 'Protected Switchgear Diagnosis System and Method' of Korean Patent Registration No. 10-2053540 (2019.12.02).

In the prior art, during the protective switchboard completion test, an individual test (performance test) is performed to see if the protective relay operates properly with an appropriate value, and the related circuit breaker trips when a failure occurs through an interlocking test after wiring the GIS facility (breaker) and the control circuit. It is finally verified whether the operation is performed according to a sequence such as , re-closing, etc.

However, in the prior art, it took a long time from the completion of the protection switchboard individual test to the interlocking test, so there was a problem in that the manpower was operated inefficiently.

In addition, in the conventional interlocking test according to various operating conditions such as a 345kV transmission line reclosing test or a busbar protection panel test, the operation command is repeatedly transmitted to the circuit breaker several times or dozens of times in a short time, so the life of the substation facility (breaker) is shortened and , there is a possibility that damage to the operation mechanism (damage of 345kV GIS Control Block) will occur, and there is a problem that noise complaints due to continuous operation of facilities increase.

The present invention has been devised to improve the above-described problems, and an object of one aspect of the present invention is to provide a protective switchboard diagnostic apparatus that verifies the performance state of the protective switchboard through simulation.

A protective switchboard diagnosis apparatus according to an aspect of the present invention includes an input/output module providing an interface with a protective switchboard; an interface unit connected to each input/output contact of the protection switchboard; and operating at least one of a circuit breaker or a disconnector in the standard disconnection diagram of the protection switchboard through the input/output module to determine whether it is in a normal system operation condition, and if it is in the normal system operation condition, a failure signal is transmitted to the protection switchboard, and a control unit for displaying the operation state information of the protection switchboard transmitted from the protection switchboard through a display unit, wherein the standard single-line diagram is registered for each protection switchboard, and the input/output module is provided to the protection switchboard with the circuit breaker and the disconnector DO (Digital Output) module for transmitting at least one of the status information; and a DI (Digital Input) module receiving operation state information of the protection switchboard from the protection switchboard, wherein the control unit receives and executes an operation command for each of the circuit breaker or the disconnector on the standard disconnection diagram from a user terminal and transmits the state information of each of the circuit breaker and the disconnector to the protective switchboard to check whether the state of the normal system operation condition is through the protective switchboard.

The protective switchgear diagnostic device according to an aspect of the present invention reduces the truce work time by minimizing the time of the truce and the protective switchboard interlocking test performed after the installation of equipment and the truce performed when new, expanded, or replaced power facilities such as the corresponding line and transformer. In addition, efficient manpower management is possible in accordance with the new construction of protective switchboards and the increase in the replacement quantity for old ones.

The protective switchboard diagnostic device according to another aspect of the present invention minimizes damage and life span of the protective switchboard due to mechanical stress of the substation facility (breaker) according to the repetitive circuit breaker operation test, and strengthens the interlocking test (pre-simulation, real system facility) It is possible to improve the operation reliability of the protection switchboard through

The protective switchboard diagnosis apparatus according to another aspect of the present invention can perform a protective switchgear simulation interlocking test by using a diagnostic device without an actual facility, so that the job ability can be strengthened by improving the understanding of the system protection facility.

1 is a block diagram of an apparatus for diagnosing a protective switchboard according to an embodiment of the present invention.
2 is a test configuration diagram of a protective switchboard diagnostic apparatus according to an embodiment of the present invention.
3 is a diagram illustrating a test subject selection screen according to an embodiment of the present invention.
4 is a view showing a 154kV transformer protection panel selection screen according to an embodiment of the present invention.
5 is a view showing a 154kV transmission line protection panel selection screen according to an embodiment of the present invention.
6a to 6c are views showing a 154kV busbar protection panel selection screen according to an embodiment of the present invention.
7a to 7b are views showing a 345kV transformer protection panel selection screen according to an embodiment of the present invention.
8A to 8C are views illustrating a 3454kV transmission line protection panel selection screen according to an embodiment of the present invention.
9a to 9c is a view showing a 345kV busbar protection panel selection screen according to an embodiment of the present invention.
10 is a diagram illustrating a screen of a user setting mode according to an embodiment of the present invention.

Hereinafter, an apparatus for diagnosing a protective switchboard according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators. Therefore, definitions of these terms should be made based on the content throughout this specification.

Implementations described herein may be implemented in, for example, a method or process, an apparatus, a software program, a data stream, or a signal. Although discussed only in the context of a single form of implementation (eg, discussed only as a method), implementations of the discussed features may also be implemented in other forms (eg, as an apparatus or program). The apparatus may be implemented in suitable hardware, software and firmware, and the like. A method may be implemented in an apparatus such as, for example, a processor, which generally refers to a computer, a microprocessor, a processing device, including an integrated circuit or programmable logic device, or the like. Processors also include communication devices such as computers, cell phones, portable/personal digital assistants ("PDA") and other devices that facilitate communication of information between end-users.

1 is a block diagram of a protective switchboard diagnostic apparatus according to an embodiment of the present invention, and FIG. 2 is a test configuration diagram of a protective switchboard diagnostic apparatus according to an embodiment of the present invention.

1 and 2 , an apparatus for diagnosing a protective switchboard according to an embodiment of the present invention includes a diagnostic device 30 and a user terminal 20 .

The protective switchgear 10 monitors the power system of transmission/distribution lines and generators/substations connected to busbars and circuit breakers, and checks the operation status and measurement values of various devices used on the transmission/distribution line, and when an abnormality occurs, a fault section line control on/off to prevent the spread of abnormal occurrences.

The user terminal 20 is connected to the diagnostic device 30 through a wired/wireless communication network, receives and transmits various control commands from the user to the diagnostic device 30 , and receives and outputs various types of information transmitted from the diagnostic device 30 . do.

For example, the user terminal 20 transmits to the diagnostic device 30 an operation command for each of the circuit breaker and disconnector for controlling the operation of the protective switchboard 10 to the diagnostic device 30 .

In addition, the user terminal 20 receives and displays the operation state information of the protective switchboard 10 from the diagnostic device 30 .

That is, when the user performs a simulated diagnosis on the protective switchboard 10 , the user controls the diagnostic device 30 through the user terminal 20 to perform the simulated diagnosis on the protective switchboard 10 .

The user terminal 20 may be a notebook computer, a personal computer, a laptop computer, a smart terminal, a personal assistant digital (PDA), etc., but is not limited thereto. The user terminal 20 is equipped with various communication devices and processors, and can be used as long as it can transmit/receive various types of information and process information with the diagnostic device 30 through a wired/wireless communication network.

A local area network (LAN) or serial communication may be employed as a wired/wireless communication network between the user terminal 20 and the diagnostic device 30 , and in addition, various Internet communication networks or local area wireless communication networks may be employed. The wired/wireless communication network may be selected according to the user's communication environment or diagnosis environment.

The diagnostic device 30 operates at least one of a circuit breaker or a disconnector in the standard disconnection diagram of the protective switchboard 10 through the input/output module 30 to check whether it is in a normal system operation condition, and if it is in a normal system operation condition, the protective switchboard After transmitting the fault signal to (10), the fault signal is transmitted through the internal operation of the protection switchboard 10, and the circuit breaker operates by the transmitted signal. The operation state information of the circuit breaker is displayed through the display unit 32 .

The standard single-line diagram is a schematic diagram generally showing power facilities such as 345/154kV transmission lines and transformer busbars. And, in order to prevent the spread of the abnormality by on/off control of the fault section line when an abnormality occurs in various devices used on the transmission/distribution line, at least one circuit breaker or disconnector may be provided.

In this embodiment, the protective switchgear 10 is a 154kV transformer protection panel, a 154kV transmission line protection panel, a 154kV busbar protection panel, a 345kV transformer protection panel, a 3454kV transmission line protection panel, and a 345kV busbar protection panel can be selected from, , standard single-wire diagrams may be registered for each of these protection switchboards (10).

In addition, the standard single-line diagram may be newly created by the user. That is, when a user arbitrarily produces a standard single-line diagram by selection, the newly manufactured standard single-line diagram may also be registered in the same manner as the existing protective switchboard 10 . Therefore, when the protection switchboard 10 is newly installed or for protection switchboard education, a new standard single line diagram is produced, and based on this newly produced standard single line diagram, a simulated diagnosis is performed like the existing protection switchboard 10 above. can be done

The diagnostic device 30 includes an input/output module 30 , a display unit 32 , a user setting unit 33 , and a control unit 34 .

The input/output module 30 provides an interface with the protection switchboard 10 and may be manufactured based on a programmable logic controller (PLC). The input/output module 30 includes a digital input (DI) module 312 and a digital output (DO) module 311 .

The DI module 312 is electrically connected to the protection switchboard 10 , receives operation state information of the protection switchboard 10 from the protection switchboard 10 , converts it through a PLC, and inputs it to the control unit 34 .

The operation state information of the protection switchboard 10 may include trip information and Breaker Failure Initiate (BFI) information of the protection switchboard 10 .

The DO module 311 is electrically connected to the protection switchboard 10 and converts the status information (DS status and CB status) of at least one of the circuit breaker and the disconnector to the protection switchboard 10 input from the control unit 34 through the PLC. and delivered to the protection switchboard (10).

The state information of the circuit breaker and the disconnector is information on the state of the circuit breaker and the disconnector in the protective switchboard 10, and the protective switchboard 10 determines whether the normal system operation condition is satisfied according to the state information of the circuit breaker and the disconnector.

The interface unit is connected to each input/output contact of the protection switchboard 10 .

That is, the protective switchboard 10 and the diagnostic device 30 may be connected through the input/output module 30 and the interface unit as shown in FIG. 2 .

* The display unit 32 displays various information for the simulation diagnosis of the protection switchboard 10 . For example, the display unit 32 displays a standard single-line diagram of the protection switchboard 10 and displays operation state information of the protection switchboard 10 . Also, the display unit 32 may display the current operating state of the protection switchboard 10 .

That is, the display unit 32 displays information necessary for the simulation diagnosis of the protection switchboard 10 and the simulation diagnosis result according to the control signal of the control unit 34 so that the user can diagnose the protection switchboard 10 . there will be

The user setting unit 33 newly creates a standard single line diagram according to a control command input from the user terminal 20 , and newly registers the newly produced standard single line diagram as any one of the standard single line diagrams.

The control unit 34 operates at least one of a circuit breaker or a disconnector in the standard disconnection diagram of the protection switchboard 10 through the input/output module 30 to determine whether it is in a normal system operation condition, and if it is in a normal system operation condition, the protection switchboard ( After the failure signal is transmitted to 10), the operation state information of the protection switchboard 10 transmitted from the protection switchboard 10 is displayed through the display unit 32 .

An operation process of the control unit 34 will be described with reference to FIGS. 3 to 10 .

Figure 3 is a view showing a test target selection screen according to an embodiment of the present invention, Figure 4 is a view showing a 154kV transformer protection panel selection screen according to an embodiment of the present invention, Figure 5 is an embodiment of the present invention It is a view showing a 154kV transmission line protection panel selection screen according to an example, FIGS. 6a to 6c are views showing a 154kV busbar protection panel selection screen according to an embodiment of the present invention, and FIGS. 7a to 7b are one of the present invention It is a view showing a 345kV transformer protection panel selection screen according to an embodiment, and FIGS. 8a to 8c are views showing a 3454kV transmission line protection panel selection screen according to an embodiment of the present invention, and FIGS. 9a to 9c are views of the present invention It is a view showing a screen for selecting a 345kV busbar protection group according to an embodiment, and FIG. 10 is a view showing a screen of a user setting mode according to an embodiment of the present invention.

First, the user terminal 20 displays the protection switchboard 10 that can be simulated and selects it from the user. At this time, the user selects the protection switchgear 10 to be a simulation test target.

FIG. 3 shows a screen in which the protection switchboard 10 capable of simulated diagnosis is listed through the user terminal 20 . The protection switchgear 10 may be any one of a 154kV transformer protection panel, a 154kV transmission line protection panel, a 154kV busbar protection panel, a 345kV transformer protection panel, a 3454kV transmission line protection panel, and a 345kV busbar protection panel.

At this time, the user may select the protection switchboard 10 to perform the simulation diagnosis.

The control unit 34 selects the protection switchboard 10 to be a simulated diagnosis target according to a control command from the user terminal 20 . When the protection switchboard 10 is selected, the control unit 34 displays a standard single-line diagram of the corresponding protection switchboard 10 through the display unit 32 .

Then, the control unit 34 may receive an operation command for each of the circuit breaker or disconnector on the standard disconnection diagram from the user terminal 20, and execute the circuit breaker or disconnector according to the operation command.

Then, the control unit 34 transmits the state information of each of the circuit breakers or disconnectors to the protection switchboard 10 through the DO module 311 .

In this case, the protective switchboard 10 determines whether the normal system operation condition is satisfied with the input state information of each circuit breaker or disconnector. At this time, if it is confirmed that the normal system operation condition is satisfied, the control unit 34 transmits a failure signal to the protection switchboard 10 .

Accordingly, the protection switchboard 10 operates the trip output contact according to the failure signal transmitted from the control unit 34, so that the operation status information of the protection switchboard 10, for example, trip information or BFI information, is transmitted through the DI module 312. transmit

The DI module 312 inputs trip information or BFI information to the control unit 34, and the control unit 34 displays the state of the corresponding protection switchboard 10 through a standard single-line diagram according to the corresponding trip information or BFI information.

That is, the control unit 34 is a standard single-line diagram for each of the 154kV transmission line protection panel, 154kV busbar protection panel, 345kV transformer protection panel, 3454kV transmission line protection panel, and 345kV busbar protection panel, as shown in FIGS. 4 to 9 . Based on the , it is possible to perform a simulation diagnosis of the protection switchboard (10).

Also, as shown in FIG. 10 , the control unit 34 may perform a simulation diagnosis on the corresponding protective switchboard 10 based on a standard single-line diagram newly manufactured by the user.

As described above, the protective switchboard diagnostic apparatus according to an embodiment of the present invention minimizes the protective switchboard interlocking test time performed when new, expanded, or replaced power facilities such as the corresponding line and transformer, thereby shortening the truce work time, and protecting the switchboard. Efficient manpower management is possible in accordance with the increase in new and old replacement quantities.

In addition, the protective switchgear diagnostic device according to an embodiment of the present invention minimizes damage and life span of the protective switchboard 10 due to mechanical stress of the substation equipment (breaker) according to the repetitive circuit breaker operation test, and strengthens the interlocking test (pre- It is possible to improve the operation reliability of the protection switchboard through simulation and real system facilities).

In addition, the protective switchboard diagnostic device according to an embodiment of the present invention can perform a protective switchboard simulation interlocking test by using the diagnostic device 30 without an actual facility, so that the job ability can be strengthened by improving the understanding of the system protection facility. do.

Implementations described herein may be implemented in, for example, a method or process, an apparatus, a software program, a data stream, or a signal. Although discussed only in the context of a single form of implementation (eg, discussed only as a method), implementations of the discussed features may also be implemented in other forms (eg, as an apparatus or program). The apparatus may be implemented in suitable hardware, software and firmware, and the like. A method may be implemented in an apparatus such as, for example, a processor, which generally refers to a computer, a microprocessor, a processing device, including an integrated circuit or programmable logic device, or the like. Processors also include communication devices such as computers, cell phones, portable/personal digital assistants ("PDA") and other devices that facilitate communication of information between end-users.

Although the present invention has been described with reference to the embodiment shown in the drawings, this is merely exemplary, and it is understood that various modifications and equivalent other embodiments are possible by those of ordinary skill in the art. will understand Accordingly, the true technical protection scope of the present invention should be defined by the following claims.

10: protective switchboard 20: user terminal
30: diagnostic device 30: input/output module
311: DO module 312: DI module
32: display unit 33: user setting unit
34: control unit

Claims (1)

an input/output module providing an interface with the protection switchboard;
an interface unit connected to each input/output contact of the protection switchboard; and
After operating at least one of a circuit breaker or a disconnector in the standard disconnection diagram of the protection switchboard through the input/output module, it is determined whether it is in a normal system operation condition, and if it is in the normal system operation condition, a failure signal is transmitted to the protection switchboard, and then A control unit for displaying the operation state information of the protection switchboard transmitted from the protection switchboard through a display unit,
The standard single wire diagram is registered for each protection switchboard,
The input/output module may include: a digital output (DO) module for transmitting status information of at least one of the circuit breaker and the disconnector to the protection switchboard; and a DI (Digital Input) module receiving operation state information of the protection switchboard from the protection switchboard,
The control unit receives and executes an operation command for each of the circuit breaker or the disconnector on the standard disconnection diagram from the user terminal, and transmits the state information of the circuit breaker and the disconnector to the protection switchboard to provide a normal system through the protection switchboard Protective switchboard diagnostic device, characterized in that to check whether the operating condition state.

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