KR20230099229A - Apparatus and method for monitoring substation - Google Patents

Abstract

The present invention includes: an input module which receives an operation signal for each of a plurality of overcurrent relays provided in a substation and a sensing signal for each of the amount of gas filled in a plurality of disconnectors and a plurality of instrument transformers provided in the substation; and a processor which detects the location of a failure based on operation signals and sensing signals input through the input module. Therefore, it is possible to detect a failure occurring in facilities provided inside the substation.

Description

Substation monitoring apparatus and method {APPARATUS AND METHOD FOR MONITORING SUBSTATION}

The present invention relates to a substation monitoring apparatus and method, and more particularly, to a substation monitoring apparatus and method capable of detecting a failure occurring in a facility provided inside a substation.

A substation is a facility installed to change the nature of voltage or current in the process of sending power produced by a power plant to consumers through transmission lines or distribution lines. In substations, main transformers, disconnectors, circuit breakers, ancestor facilities, lightning arresters, and switchboards are installed.

When a power outage occurs in the main transformer of a substation, a wide area power outage may occur. Therefore, workers constantly monitor the state of the main transformer in order to monitor and respond to power outages of the main transformer of the substation. However, in the related art, when a power outage occurs in a 154 kV distribution transformer, a power supply directly checks fault event data to determine a fault condition and performs fault recovery accordingly. In the case of such a conventional method, not only the failure recovery time varies depending on the individual capacity of the dispatcher, but also there is a problem that the failure is propagated due to an error in determining the failure situation or an error in operating the equipment.

The background art of the present invention is disclosed in Korean Patent Publication No. 10-2020-0012573 (2020.02.05.) 'Substation blackout prevention device'.

An object of the present invention is to provide a substation monitoring apparatus and method capable of detecting a failure in equipment provided inside a substation and visually displaying a location where the failure occurred and guiding the user.

An apparatus for monitoring a substation according to an aspect of the present invention detects an operation signal for each of a plurality of overcurrent relays provided in a substation, and a gas amount filled in a plurality of disconnectors and a plurality of instrument transformers provided in the substation, respectively. an input module that receives signals; and a processor for detecting a location where a failure has occurred based on an operation signal and a sensing signal input through the input module.

In the substation monitoring method according to an aspect of the present invention, a processor receives an operation signal for each of a plurality of overcurrent relays provided in a substation through an input module, and a plurality of disconnectors and a plurality of instrument transformers provided in the substation. Receiving a sensing signal for each filled gas amount; and detecting, by the processor, a faulty location based on an operation signal and a sensing signal input through the input module.

According to one aspect of the present invention, it is possible to detect a failure occurring in a facility provided inside a substation.

According to another aspect of the present invention, a user may be guided by visually displaying a location where a failure occurs.

According to another aspect of the present invention, a standard operating procedure (SOP) for restoring a faulty area may be guided to a user.

1 is a block diagram illustrating a substation monitoring apparatus according to an embodiment of the present invention.
2 and 3 are exemplary views for explaining a substation monitoring device according to an embodiment of the present invention.
4 to 6 are flowcharts for explaining a substation monitoring method according to an embodiment of the present invention.

Hereinafter, a substation monitoring apparatus and method 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 lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of a user or operator. Therefore, definitions of these terms will have to be made based on the content throughout this specification.

1 is a block configuration diagram for explaining a substation monitoring device according to an embodiment of the present invention, and FIGS. 2 and 3 are exemplary diagrams for explaining a substation monitoring device according to an embodiment of the present invention.

Referring to FIG. 1 , a substation monitoring device according to an embodiment of the present invention may include an input module 100, an output module 200, a memory 300, and a processor 400.

The input module 100 may receive an operation signal for each of a plurality of overcurrent relays provided in the substation and a sensing signal for each amount of gas filled in a plurality of disconnectors and a plurality of instrument transformers provided in the substation. . Here, the operating signal may mean a trip signal and a close signal generated from the relay.

Meanwhile, a plurality of overcurrent relays, a plurality of disconnectors, and a plurality of instrument transformers may be provided in the substation. Specifically, an overcurrent relay 51P is provided on the primary side of the main transformer (M.Tr) of the substation. An overcurrent relay 50B (OLTC) and an overcurrent relay 50B (96P) are provided on the secondary side of the main transformer of the substation to prevent OLTC operation when the secondary side fails. 51S is provided on the secondary side of the main transformer of the substation, and an overcurrent relay 51SN is provided on the neutral line of the secondary side of the main transformer. On the other hand, parallel two-line bus lines (BUS) are provided on the primary side and the secondary side of the transformer, respectively, and the parallel two-line bus lines are connected to each other through a disconnecting switch (DS). A plurality of disconnectors are connected to each bus bar. Each distribution line may be connected to a line connecting two parallel bus lines. Distribution lines are provided with an overcurrent relay (OCR) for back-up protection and an overcurrent ground relay (OCGR).

The sensing signal may be a signal indicating a state of the amount of gas filled in the disconnector and the instrument transformer. When a failure occurs in the disconnector or instrument transformer, the pressure relief valve provided in the disconnector or instrument transformer operates to release the gas (e.g., SF6) filled inside, thereby reducing the amount of gas inside the disconnector or instrument transformer. do. The disconnector or metering transformer can itself sense the change in the amount of internal gas and output it to the outside, and the input module 100 can receive signals output from the disconnector and metering transformer.

The output module 200 may output a result calculated through the processor 400 to be described later. According to one embodiment, the processor 400 may be a display.

The memory 300 may store various data required for the processor 400 to detect a failure point in advance. In addition, the memory 300 may store various data calculated in the process of detecting the location where the processor 400 has a failure. In addition, a single line diagram (or a distribution system diagram) of a substation may be previously stored in the memory 300 . In addition, a standard operating procedure (SOP) for each location may be stored in the memory 300 . Here, the SOP is an emergency action guideline for restoring a faulty area, and its contents may be different for each area. In the memory 300, SOPs according to locations may be stored in advance.

The processor 400 may detect a faulty location based on an operation signal and a sensing signal input through the input module 100 .

The processor 400 faults on the bus side based on the operating states of 50B (OLTC), 50B (96P), 51SN, and 51S among the plurality of overcurrent relays, and the sensing signals for each of the plurality of disconnectors and the plurality of instrument transformers. Whether or not this has occurred can be determined.

Processor 400 generates a trip signal from at least one of 50B (OLTC) and 50B (96P), generates a trip signal from at least one of 51SN and 51S, and generates at least one of a plurality of disconnectors and a plurality of instrument transformers. If the amount of gas filled inside decreases, it can be determined that a failure has occurred on the bus side.

When a failure occurs in at least one of the plurality of disconnectors and the plurality of instrument transformers connected to the bus, a failure may occur on the bus side. In this case, the overcurrent relays (50B (OLTC), 50B (96P), 51SN, 51S) provided on the primary and secondary sides of the main transformer (M.Tr) connected to the bus can operate when a failure occurs in the bus. there is. The present invention was conceived from the foregoing facts, and it is confirmed whether the amount of gas filled in at least one of the plurality of disconnectors and the plurality of instrument transformers has decreased, and the overcurrent relay provided on the primary and secondary sides of the transformer is operated It is possible to improve the reliability of detecting a failure on the bus side by determining whether a failure has occurred on the bus side by checking whether or not a failure has occurred on the bus side. Fig. 2a shows a logic circuit for detecting a failure on the bus side.

The processor 400 may identify a disconnector or instrument transformer in which the amount of gas is reduced among a plurality of disconnectors and instrument transformers, and detect a bus bar equipped with the identified disconnector or instrument transformer as a location where a failure has occurred. . That is, the processor 400 may determine that a failure has occurred in the disconnector or the bus to which the instrument transformer is connected, among the plurality of disconnectors and instrument transformers, in which the amount of gas has decreased.

The processor 400 determines the operating states of the overcurrent relays (OCR and OCGR) provided on the distribution line among the plurality of overcurrent relays, and the operating states of 50B (OLTC), 50B (96P), 51SN, and 51S among the plurality of overcurrent relays Based on this, it is possible to determine whether a failure has occurred on the distribution line side.

The processor 400 generates a trip signal from at least one of overcurrent relays (OCR and OCGR) provided in the distribution line, generates a trip signal from at least one of 51SN and 51S, and generates a trip signal from 50B (OLTC) and 50B (96P). When a trip signal is generated in at least one, it may be determined that a failure has occurred in the distribution line.

When a failure occurs in a certain distribution line, overcurrent relays (OCR and OCGR) provided in the distribution line may operate. In this case, the failure spreads due to the non-operation and delay operation of the circuit breaker provided in the distribution line, and the overcurrent relays (50B (OLTC), 50B (96P), 51SN) provided on the primary and secondary sides of the main transformer (M.Tr) , 51S) can work. The present invention has been conceived from the foregoing facts, and it is confirmed whether the overcurrent relay provided on the distribution line among the plurality of overcurrent relays is operating, and at the same time, whether the overcurrent relay provided on the primary side and the secondary side of the transformer is operating. Reliability of detecting a failure in the distribution line can be improved by determining whether a failure has occurred on the furnace side. 2C shows a logic circuit for detecting a failure on the distribution line side.

The processor 400 may identify an overcurrent relay that generates a trip signal among overcurrent relays provided in the distribution line, and may detect the distribution line including the identified overcurrent relay as a faulty location. That is, the processor 400 may determine that a failure has occurred in the distribution line equipped with the overcurrent relay that generated the trip signal.

The processor 400 determines the operating states of 50B (OLTC), 50B (96P), 51SN, 51S, and 51P among the plurality of overcurrent relays, and the sensing signals for each of the plurality of disconnectors and the plurality of instrument transformers to the substation. It is possible to determine whether a failure has occurred in a cable plug of a gas insulated switchgear (GIS) provided.

The processor 400 generates a trip signal from at least one of 50B (OLTC) and the 50B (96P), generates a trip signal from at least one of 51SN, 51S, and 51P, and generates a plurality of disconnectors and a plurality of instrument transformers. If the amount of gas does not decrease, it can be determined that a failure has occurred in the cable connection part of the GIS provided in the substation.

When a failure occurs in the cable connection part of the GIS, the overcurrent relays (50B (OLTC), 50B (96P), 51SN, 51S, 51P) provided on the primary and secondary sides of the main transformer (M.Tr) can operate. On the other hand, since the cable connection part of the GIS is located outside the GIS, not inside the GIS, the amount of gas inside the facility does not change when a failure occurs in the cable connection part of the GIS. The present invention has been conceived from the above facts, and when the overcurrent relays provided on the primary and secondary sides of the transformer operate but the amount of gas inside the facility does not change, it can be determined that a failure has occurred in the cable connection part of the GIS. Meanwhile, the processor 400 may additionally determine whether the fire alarm sensor provided in the substation is operating and whether the overcurrent relays (OCR and OCGR) provided in the distribution line are operating. Fig. 2b shows a logic circuit for detecting a failure in a cable connection of a GIS.

The processor 400 may display an area where a failure has occurred on a single-line diagram (distribution system diagram) of a substation and output it through the output module 200 . A single-line diagram of the substation may be stored in advance in the memory 300, and the processor 400 displays the location where the failure occurred on the single-line diagram of the substation so that the user can easily check the location where the failure occurred. A single-line diagram of the substation in which this occurrence is indicated may be output through the output module 200 . 3A is an embodiment of a single-line diagram output through the output module 200 when a failure occurs on the bus side, and FIG. 3B is a single-line diagram output through the output module 200 when a failure occurs on the distribution line side. 3C is an embodiment of a single-line diagram output through the output module 200 when a failure occurs at a GIS cable connection.

The processor 400 may refer to the SOPs for each unit stored in the memory 300 to detect an SOP corresponding to a faulty unit and output the detected SOP through the output module 200 . That is, the processor 400 may detect an SOP corresponding to a location where a failure has occurred among SOPs for each location stored in the memory 300 in advance, and output the detected SOP through the output module 200 so that the user can check it. . In this way, the present invention can support rapid and accurate failure recovery by providing the user with an SOP corresponding to the location where the failure occurred.

Meanwhile, there may be a plurality of types of failures that may occur in a specific location, and in this case, a plurality of SOPs corresponding to the corresponding location may be provided. The processor 400 may receive status information such as voltage and current of the facility provided in the corresponding location from the corresponding facility or server through the input module 100, and determine the type of failure based on the received status information. And, among the SOPs corresponding to the corresponding location, the SOP corresponding to the previously determined failure type may be output through the output module 200 .

In the above-described embodiment, it has been described that the processor 400 outputs a single-line diagram of a substation in which a failure has occurred or an SOP corresponding to a failure has occurred through the output module 200. A single-line diagram of a substation in which an occurrence point is indicated or an SOP corresponding to a location in which a failure has occurred may be transmitted to a user terminal carried by a manager of the substation. In this case, the substation monitoring apparatus may include a communication module for performing wireless communication with the user terminal.

4 is a first flow chart for explaining a substation monitoring method according to an embodiment of the present invention.

Hereinafter, with reference to FIG. 4 , a process of detecting a location where a failure occurs in the processor 400 will be described.

First, the processor 400 inputs an operation signal for each of the plurality of overcurrent relays provided in the substation through the input module 100 and the amount of gas filled in the plurality of disconnectors and the plurality of instrument transformers provided in the substation. It is possible to receive a sensing signal for the input. (S401)

Subsequently, the processor 400 may detect the location where the failure has occurred based on the operation signal and the sensing signal input through the input module 100 (S403).

Then, the processor 400 may display the location where the failure occurred on the single-line diagram of the substation and output it through the output module 200 (S405).

Next, the processor 400 may refer to the memory 300 in which the SOPs for each part are stored, detect an SOP corresponding to a faulty part (S407), and output the detected SOP through the output module 200. (S409)

5 is a second flow chart illustrating a substation monitoring method according to an embodiment of the present invention.

Hereinafter, with reference to FIG. 5, a process of detecting a failure occurring on the bus side will be described.

First, the processor 400 determines the operating state of 50B (OLTC), 50B (96P), 51SN, and 51S among the plurality of overcurrent relays and the sensing signals for each of the plurality of disconnectors and the plurality of instrument transformers on the bus side. It can be determined whether a failure has occurred (S501).

At this time, the processor 400 generates a trip signal from at least one of 50B (OLTC) and 50B (96P), generates a trip signal from at least one of 51SN and 51S, and generates at least one of a plurality of disconnectors and a plurality of instrument transformers. When the amount of gas filled in one interior decreases, it can be determined that a failure has occurred on the bus side.

When it is determined that a failure has occurred on the bus side, the processor 400 identifies the disconnector or instrument transformer in which the amount of gas has decreased among the plurality of disconnectors and instrument transformers (S503), and identifies the disconnector or instrument transformer. The bus bar equipped with can be detected as a location where a failure has occurred. (S505)

6 is a third flowchart for explaining a substation monitoring method according to an embodiment of the present invention.

Hereinafter, referring to FIG. 6 , a process of detecting a failure occurring on the distribution line side will be described.

First, the processor 400 determines the operating state of the overcurrent relays (OCR and OCGR) provided on the distribution line among the plurality of overcurrent relays, and the operation states of the overcurrent relays 50B (OLTC), 50B (96P), 51SN, and 51S among the plurality of overcurrent relays. Based on the operating state, it may be determined whether a failure has occurred on the distribution line side (S601).

At this time, the processor 400 generates a trip signal from at least one of overcurrent relays (OCR and OCGR) provided in the distribution line, generates a trip signal from at least one of 51SN and 51S, 50B (OLTC) and 50B (96P ), when a trip signal is generated in at least one of the distribution lines, it can be determined that a failure has occurred.

When it is determined that a failure has occurred on the distribution line side, the processor 400 identifies an overcurrent relay having a trip signal among the overcurrent relays provided in the distribution line (S603), and detects the failure of the distribution line provided with the identified overcurrent relay. It can be detected by the location where it occurred. (S605)

As described above, the substation monitoring apparatus and method according to an embodiment of the present invention can detect a failure occurring in a facility provided inside a substation. In addition, the present invention can guide the user by visually displaying a location where a failure has occurred. In addition, the present invention can guide a user to a standard operating procedure (SOP) for restoring an area where a failure has occurred.

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

Although the present invention has been described with reference to the embodiments shown in the drawings, it should be noted that this is only exemplary and various modifications and equivalent other embodiments are possible from those skilled in the art to which the technology pertains. will understand Therefore, the true technical protection scope of the present invention should be defined by the claims below.

100: input module
200: output module
300: memory
400: processor

Claims (22)

An input module that receives an operation signal for each of the plurality of overcurrent relays provided in the substation and a sensing signal for each amount of gas filled in the plurality of disconnectors and the plurality of instrument transformers provided in the substation; and
a processor for detecting a location where a failure has occurred based on an operation signal and a sensing signal input through the input module;
Substation monitoring device comprising a.
According to claim 1,
The processor determines the bus side based on the operating states of 50B (OLTC), 50B (96P), 51SN, and 51S among the plurality of overcurrent relays and the sensing signals for each of the plurality of disconnectors and the plurality of instrument transformers. Substation monitoring device, characterized in that for determining whether a failure has occurred in the.
According to claim 2,
The processor generates a trip signal in at least one of the 50B (OLTC) and the 50B (96P), generates a trip signal in at least one of the 51SN and the 51S, and generates a trip signal for the plurality of disconnectors and the plurality of instruments. A substation monitoring device that determines that a failure has occurred on the bus side when the amount of gas filled in at least one of the transformers decreases.
According to claim 3,
The processor identifies the disconnector or instrument transformer in which the gas amount is reduced among the plurality of disconnectors and the plurality of instrument transformers, and detects a bus provided with the identified disconnector or instrument transformer as a location where a failure has occurred Substation monitoring device characterized in that.
According to claim 1,
The processor, based on the operating states of 50B (OLTC), 50B (96P), 51SN, 51S, and 51P among the plurality of overcurrent relays, and sensing signals for each of the plurality of disconnectors and the plurality of instrument transformers Substation monitoring device, characterized in that for determining whether a failure has occurred in the cable connection portion of the GIS provided in the substation.
According to claim 5,
The processor generates a trip signal in at least one of the 50B (OLTC) and the 50B (96P), generates a trip signal in at least one of the 51SN, the 51S, and the 51P, and generates the plurality of disconnectors and the plurality of disconnectors. Substation monitoring device characterized in that it is determined that a failure has occurred in the cable connection of the GIS provided in the substation when the amount of gas filled inside the instrument transformer of the substation does not decrease.
According to claim 1,
The processor, among the plurality of overcurrent relays, the operating state of the overcurrent relays (OCR and OCGR) provided on the distribution line, and the operation of 50B (OLTC), 50B (96P), 51SN and 51S among the plurality of overcurrent relays A substation monitoring device characterized in that it determines whether a failure has occurred on the distribution line side based on the state.
According to claim 7,
The processor generates a trip signal from at least one of the overcurrent relays (OCR and OCGR) provided in the distribution line, generates a trip signal from at least one of the 51SN and the 51S, and the 50B (OLTC) and the 50B Substation monitoring device characterized in that it is determined that a failure has occurred in the distribution line when a trip signal is generated in at least one of (96P).
According to claim 8,
The processor identifies an overcurrent relay that generates a trip signal among the overcurrent relays provided in the distribution line, and detects the distribution line equipped with the identified overcurrent relay as a location where a fault occurs. Substation monitoring device, characterized in that.
According to claim 1,
An output module that outputs information; further comprising,
The substation monitoring device, characterized in that the processor displays the location where the failure occurred on a single-line diagram of the substation and outputs it through the output module.
According to claim 10,
Further comprising a memory storing standard operating procedure (SOP) for each unit,
The substation monitoring apparatus according to claim 1 , wherein the processor detects an SOP corresponding to the location where the failure occurred with reference to the memory, and outputs the detected SOP through the output module.
The processor receives an operation signal for each of a plurality of overcurrent relays provided in the substation and a sensing signal for each amount of gas filled in a plurality of disconnectors and a plurality of instrument transformers provided in the substation through an input module. step; and
detecting, by the processor, an area where a failure has occurred based on an operation signal and a sensing signal input through the input module;
Substation monitoring method comprising a.
According to claim 12,
The detection step is
The processor determines the bus side based on the operating states of 50B (OLTC), 50B (96P), 51SN, and 51S among the plurality of overcurrent relays and the sensing signals for each of the plurality of disconnectors and the plurality of instrument transformers. Determining whether a failure has occurred in;
Substation monitoring method comprising a.
According to claim 13,
In the determining step, the processor,
A trip signal is generated in at least one of the 50B (OLTC) and the 50B (96P), a trip signal is generated in at least one of the 51SN and the 51S, and at least one of the plurality of disconnectors and the plurality of instrument transformers A substation monitoring method characterized in that it is determined that a failure has occurred on the bus side when the amount of gas filled in the inside decreases.
According to claim 14,
The detection step is
identifying, by the processor, a disconnector or instrument transformer in which a reduction in gas amount has occurred among the plurality of disconnectors and the plurality of instrument transformers; and
Detecting, by the processor, a bus bar equipped with the identified disconnector or instrument transformer as a location where a failure has occurred;
Substation monitoring method further comprising a.
According to claim 12,
The detection step is
Based on the operating states of 50B (OLTC), 50B (96P), 51SN, 51S, and 51P among the plurality of overcurrent relays, and sensing signals for each of the plurality of disconnectors and the plurality of instrument transformers, Determining whether a failure has occurred in the cable connection part of the GIS provided in the substation;
Substation monitoring method comprising a.
According to claim 16,
In the determining step, the processor,
A trip signal is generated in at least one of the 50B (OLTC) and the 50B (96P), a trip signal is generated in at least one of the 51SN, the 51S, and the 51P, and the plurality of disconnectors and the plurality of instrument transformers are generated. Substation monitoring method characterized in that it is determined that a failure has occurred in the cable connection of the GIS provided in the substation when the amount of gas filled inside the substation does not decrease.
According to claim 12,
The detection step is
The processor operates the overcurrent relays (OCR and OCGR) provided on the distribution line among the plurality of overcurrent relays, and the operation of 50B (OLTC), 50B (96P), 51SN, and 51S among the plurality of overcurrent relays Determining whether a failure has occurred on the distribution line side based on the state;
Substation monitoring method comprising a.
According to claim 18,
In the determining step, the processor,
A trip signal is generated in at least one of the overcurrent relays (OCR and OCGR) provided in the distribution line, a trip signal is generated in at least one of the 51SN and the 51S, and among the 50B (OLTC) and the 50B (96P) Substation monitoring method characterized in that it is determined that a failure has occurred in the distribution line when a trip signal is generated in at least one.
According to claim 19,
The detection step is
identifying, by the processor, an overcurrent relay that generated a trip signal among overcurrent relays provided in the distribution line; and
The substation monitoring method further comprising: detecting, by the processor, the distribution line equipped with the identified overcurrent relay as a location where a failure has occurred.
According to claim 12,
After the detection step,
displaying, by the processor, the location where the failure occurred on a single-line diagram of a substation and outputting it through an output module;
Substation monitoring method further comprising a.
According to claim 21,
After the detection step,
detecting, by the processor, an SOP corresponding to a location where the failure occurs by referring to a memory in which a standard operating procedure (SOP) for each location is stored; and
The substation monitoring method further comprising: outputting, by the processor, the detected SOP through the output module.

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