KR101070432B1 - Smart switchboard comprising testing device for preventing short circuit - Google Patents

Abstract

Intelligent switchboards are provided to test the condition of the distribution lines before powering on them. An intelligent switchgear comprising: a switchgear having a mechanical mechanism for distributing electric power, comprising: a line breaker to block a connection between an incoming line and a distribution line; A line test unit for testing a state of a distribution line by applying a test signal to the distribution line; A radio recognition tag coupled to the line test unit and storing the test result of the line test unit; A distribution box containing a line breaker, a line test section, and a radio recognition tag; And a relay unit arranged to connect the inside and the outside of the distribution box to extend the communication distance between the RFID tag and the reader located outside the distribution box.

Description

SMART SWITCHBOARD COMPRISING TESTING DEVICE FOR PREVENTING SHORT CIRCUIT}

The present invention relates to an intelligent switchgear capable of testing the state of a distribution line before powering on.

A switchboard is a facility installed in a power plant, substation, switchgear, or the like to receive or distribute electricity for high voltage or special high voltage. Mechanisms in switchboards are usually protected by metal enclosures of one or three special grounding schemes. In addition, the switchgear is stored and protected by a metal box so that a mechanical device such as an internal high pressure inlet switch and a circuit breaker cannot be easily operated by a person other than the operator.

Distribution lines connected to the other end of the distribution panel are extended by transmission towers, telephone poles, etc. to supply electric power to factories, buildings, homes, and the like in specific regions.

On the other hand, after the new construction of the distribution line or maintenance work, the electrical input of the distribution line should be carried out with great care. Otherwise, it may cause a safety accident such as electric shock. For example, when some workers are working and are notified that work on the distribution line has been completed, the operator of the power plant or substation will turn on the distribution line, which will cause some workers to receive an electric shock. Can be.

It is an object of the present invention to provide an intelligent switchgear capable of testing the condition of a distribution line before power is applied in a distribution line of high or extra high voltage.

It is still another object of the present invention to provide an intelligent switchgear capable of transmitting test results for a wiring line to a remote switchgear control device through a wireless recognition system.

According to an aspect of the present invention to solve the technical problem, a switchgear having a mechanical mechanism for distributing electric power, a line breaker for cutting off the connection of the incoming line and the distribution line; A line test unit for testing a state of a distribution line by applying a test signal to the distribution line; A radio recognition tag coupled to the line test unit and storing the test result of the line test unit; A distribution box containing a line breaker, a line test section, and a radio recognition tag; And a relay unit arranged to connect the inside and the outside of the distribution box to extend the communication distance between the RFID tag and the reader located outside the distribution box.

In one embodiment, the line test section includes a switch section for selectively connecting to the distribution line.

A line test unit generating a test signal; A recorder which stores the test result in the RFID tag; And a control unit for controlling the switch unit, the signal generation unit, and the recording unit.

In one embodiment, in an intelligent switchboard for testing a distribution line, the radio recognition tag is integrally coupled to the line test unit, and the recording unit and the radio recognition tag are preferably a single module radio recognition reader and tag.

The line test unit applies a test signal of a predetermined pattern of voltage or current waveforms to one or more lines of the distribution line through the switch unit in a state in which the line breaker is inactive, detects a voltage or current waveform fed back to one or more other lines, and tests the test signal. And it may be configured to compare the applied signal and the detected signal, and determine the state of the distribution line according to the comparison result.

The radio recognition tag may include a storage unit which stores information on a distribution box or a distribution line and information on a test result; An input unit receiving a signal regarding a test result from a line test unit; A control unit connected to the storage unit and the input unit and communicating with an external device located outside the line test unit and the distribution box and controlling the output of information stored in the storage unit; And an antenna connected to the controller.

The relay unit may include: a first antenna electromagnetically coupled to the antenna of the radio recognition tag; A second antenna disposed away from the first antenna and electromagnetically coupled to the antenna on the reader side; And a wire connecting the first and second antennas to form one closed loop, the wire transmitting the induced current generated in the first and second antennas to the second and first loop antennas, respectively. have. The wiring can be a coaxial cable.

The intelligent switchboard may include a fixture that surrounds the coaxial cable and secures the repeater to the distribution box.

According to the present invention, since the state of the power distribution line can be tested by itself before the power is supplied, the safety of the power distribution line operator can be achieved. In addition, the test results for the distribution line can be transmitted to the switchboard control management system located outside the switchboard through the radio recognition tag and the relay.

In addition, by automatically testing the state of the power distribution line before the power input and transmitting the test results through a wireless recognition system, it can contribute to the implementation of the intelligent switchboard or intelligent switchboard control system in the ubiquitous environment or smart grid environment.

FIG. 1A is a schematic diagram illustrating a ubiquitous switchgear (hereinafter referred to as an intelligent switchgear) having a distribution line test apparatus according to an embodiment of the present invention.
It is a figure about an example of the external appearance of the intelligent switchboard of FIG. 1A of FIG.
1C is a perspective side view of an example of the internal structure of the intelligent switchboard of FIG. 1A.
FIG. 2 is a schematic block diagram of a line test part of the intelligent switchboard of FIG. 1A.
FIG. 3 is a procedure diagram of a line test procedure of the intelligent switchboard of FIG. 1A.
4 is a schematic block diagram of a radio recognition tag of the intelligent switchboard of FIG.
FIG. 5 is a schematic configuration diagram of a relay unit of the intelligent switchboard of FIG. 1A.
6 is a partial cross-sectional view of an example of the relay unit of FIG. 5.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings and the following description. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that the disclosure can be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Like numbers refer to like elements throughout. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In this specification, the singular forms also include the plural unless specifically stated otherwise in the text. As used herein, the terms “comprise” and / or “comprising” refer to a component, step, operation, and / or element that is mentioned in one or more other components, steps, operations and / or elements. It does not exclude existence or addition.

1A is a schematic diagram illustrating an intelligent switchboard (hereinafter, referred to as an intelligent switchboard) including an apparatus for testing a distribution line according to an embodiment of the present invention. It is a figure about an example of the external appearance of the intelligent switchboard of FIG. 1A of FIG. 1C is a perspective side view of an example of the internal structure of the intelligent switchboard of FIG. 1A.

Referring to FIG. 1A, the intelligent switchboard 100 includes a distribution box 110, a line breaker 120, a line test unit 130, a radio recognition tag 150, and a relay unit 170.

The distribution box 110 houses a mechanism for distributing power. In addition, the distribution box 110 accommodates the line breaker 120, the line test unit 130, and the radio recognition tag 150 in the interior space.

The exterior of the distribution box 110 is provided with a metallic member that forms an inner space in which the mechanical mechanism is installed, as shown in FIG. 1B. Inside the distribution box 110, as shown in FIG. 1C, mechanical mechanisms for receiving or distributing power are installed. The mechanical devices are breakers or line breakers connected between the inlet line 102 of three-phase four-wire (R1, S1, T1, N1) and the distribution line 104 of three-phase four-wire (R2, S2, T2, N2). 120. The line breaker 120 may be implemented with AISS (Automatic Failure Switchgear) or LBS (Load Switch).

The line test unit 130 applies a test signal to the distribution line 104 to test the state of the distribution line. The line test unit 130 is connected to the distribution line 104 in a state where the line breaker 120 is opened. The line test unit 130 applies a test signal having an arbitrary waveform to the power distribution line, detects a test signal returned from the power distribution line, compares the applied signal with a detection signal, and if the difference between them exceeds the reference value, It is determined that the state is abnormal. The test result is transmitted from the line test unit 130 to the radio recognition tag 150.

Radio recognition tag 150 is coupled to the line test unit 130 and stores the test results by the command of the line test unit 130. The radio recognition tag 150 reacts to a signal of a radio recognition reader outside the distribution box 110 and wirelessly outputs the stored information according to the command of the reader.

The relay unit 170 extends the communication distance between the radio recognition tag 150 located in the distribution box 110 and the reader located outside the distribution box 110. When the relay unit 170 penetrates the distribution box 110 and connects the inside and the outside of the distribution box 110, the metallic distribution box 110 overcomes the interference between the tags and the reader of the wireless recognition system. can do.

FIG. 2 is a schematic block diagram of a line test part of the intelligent switchboard of FIG. 1A.

2, the line test unit 130 includes a control unit 132, a signal generation unit 134, a recording unit 136, and a switch unit 140.

The switch unit 140 connects the signal generation unit 134 to the distribution line under the control of the control unit 132. The specific contact of the switch unit 140 is separated or insulated from the distribution line when power is supplied to the distribution line, and contacts the distribution line for the test of the distribution line when no power is supplied to the distribution line.

The signal generator 134 generates a test signal according to the instructions of the controller 132 and applies the test signal to the distribution line. The test signal may be a voltage signal, a current signal, a direct current signal, an alternating current signal, or a combination thereof. In another aspect, the test signal may be a signal for measuring line resistance, ground resistance, line impedance, or a combination thereof of a distribution line.

The recorder 136 communicates with the RFID tag and operates to store the test results in the RFID tag. The recording unit 136 may be wiredly connected to the wireless identification tag through a path such as a microstrip line or a coaxial cable or wirelessly connected to the wireless identification tag through an antenna (not shown) in the recording unit 136.

The control unit 132 controls the switch unit 140 and the signal generation unit 134 to input a test signal to the distribution line, and detects the signal on the distribution line. In addition, the control unit 132 controls the switch unit 140 and the recording unit 136 to operate so that the signal detected in the wire transmission is stored in the radio recognition tag.

FIG. 3 is a procedure diagram of a line test procedure of the intelligent switchboard of FIG. 1A.

Referring to FIG. 3, a line breaker is opened so that an incoming line and a distribution line are separated or disconnected at the time of construction, maintenance, or breakdown of a distribution line. That is, the line breaker is deactivated (S31).

Next, the contact point of the switch unit is connected to the distribution line (S32). The contacts are for the application of test current to one or more of the distribution lines or for the detection of test currents returning to one or more other lines of the distribution lines.

Next, a test signal is applied to one or more first lines of the distribution lines (S33). Then, a signal returned to at least one second line of the distribution lines is detected (S34). The second line may be the same as the first line or a different line among the three-phase three-wire or three-phase four-wire distribution lines.

Next, the line test unit compares the application signal and the detection signal (S35). As a result of the comparison, if the difference between the signals is greater than the reference value, the line test unit determines the distribution line state as abnormal (S36). The test result is transmitted from the line test part to the wireless identification tag, stored, and then transmitted to the external reader through the relay part.

In addition, this invention is not limited to the structure of an Example mentioned above. For example, in another embodiment of the present invention, the line test unit 130 may be implemented to apply only a test signal or to detect only a test signal applied at another position on the distribution line.

4 is a schematic block diagram of a radio recognition tag of the intelligent switchboard of FIG.

Referring to FIG. 4, the RFID tag 150 includes a storage unit 152, a controller 154, and an antenna 158. In addition, the radio recognition tag 150 has an input unit 156 that receives a signal for the test results from the line test unit.

In more detail, the storage unit 152 stores information about the distribution box or the distribution line and information about the test result.

The control unit 154 is connected to the storage unit 152, and communicates with an external device (reader) located outside the line test unit and the distribution box and controls the output of the information stored in the storage unit 152. The control unit 154 is a circuit unit that executes predetermined processes such as communication processing, memory access, and power conversion processing, and performs operations required for reading a received signal, user authentication, data writing, and operation. The control unit 154 may be implemented as a single integrated circuit chip together with the storage unit 152 and / or the input unit 156.

The input unit 156 includes an analog-to-digital converter that receives the analog signal output from the recording unit of the line test unit and converts the analog signal into a digital signal. Information such as a test result input to the input unit 156 is stored in the storage unit 152 by a command of the line test unit and / or control of the control unit 154.

The antenna 158 is connected to the control unit 154, and may be electromagnetically coupled with the antenna of the reader through the relay unit.

In one aspect of this embodiment, the antenna 158 may be installed to electromagnetically couple with an antenna (not shown) in the recorder of the line test unit. In that case, the recording unit may be a function unit performing a function of a radio reader / writer or a component unit performing such a function.

In another aspect of this embodiment, the radio recognition tag may be integrally coupled to the line test part. In that case, the recorder and the RFID tag of the line test section correspond to the RFID reader and tag of a single module.

FIG. 5 is a schematic configuration diagram of a relay unit of the intelligent switchboard of FIG. 1A.

Referring to FIG. 5, the relay unit 170 includes a first antenna 172, a second antenna 174, and a wire 176.

The relay unit 170 is disposed through the distribution box such that the RFID tag disposed inside the switchboard and the RFID reader located outside the switchboard are electromagnetically coupled to each other without being disturbed by the metallic switchboard. The relay unit 170 operates to extend the communication distance between the RFID tag and the RFID reader according to the frequency band used.

In more detail, in one embodiment, the first antenna 172 and the second antenna 174 are each provided to form its own loop antenna. The first and second antennas 172, 174 are connected to each other by a wiring 176. The wiring 176 is provided such that each loop antenna of the first and second antennas 172 and 174 forms one large closed loop. The first antenna 172 is disposed inside the distribution box for transmitting and receiving signals with the radio recognition tag, and the second antenna 174 is disposed outside the distribution box for transmitting and receiving signals with the radio reader.

Specific configurations such as the shape and dimensions of each portion of the relay unit 170, the number of loops of the antenna, and the like are set in consideration of resonance frequency, impedance matching, coupling, and the like. The relay unit 170 may include a configuration in which a conductive pattern is printed or etched on a base substrate such as a printed circuit board, a plastic substrate, a flexible sheet, an insulating film, or the like.

According to the above-described configuration, the relay unit 170 relays the communication between the radio recognition tag (hereinafter simply referred to as tag) 150 and the radio recognition reader (hereinafter simply referred to as reader) as follows.

When a signal is transmitted from the reader to the tag side, an induced current is generated in the second antenna 174 of the relay unit 170 by electromagnetic induction with the electromagnetic waves transmitted from the antenna of the reader. The induced current is transmitted from the second antenna 174 to the first antenna 172 through the wiring 176, the transferred induced current is converted into electromagnetic waves at the first antenna 172, and the converted electromagnetic waves are It is received as a signal by a radio recognition tag inside the distribution box.

Similarly, when a signal is transmitted from the tag 110 to the reader side, the first antenna 172 of the relay unit 170 is induced by an electromagnetic induction action with the electromagnetic waves transmitted from the antenna of the tag (see 158 of FIG. 4). Current is generated. The induced current is transmitted from the first antenna 172 to the second antenna 174 through the wiring 176, the transferred induced current is converted into electromagnetic waves at the second antenna 174, and the converted electromagnetic waves are It is sent as a signal to a reader outside the switchboard.

As such, according to the present exemplary embodiment, a direct communication channel may be formed between the tag 150 and the reader through the relay unit 170 installed to connect the inside and the outside of the metallic enclosure of the switchboard.

6 is a partial cross-sectional view of an example of the relay unit of FIG. 5.

Referring to FIG. 6, the relay unit 170a according to the present embodiment includes a first antenna 172a, a second antenna 174a, a coaxial cable 176a, and a fixture 178.

The first antenna 172a has a spiral wire that forms a loop antenna. Both ends of the wire forming the first antenna 172a are connected to the first connector 171. The second antenna 174a has a spiral wire that forms a loop antenna. Both ends of the wire forming the second antenna 174a are connected to the second connector 173.

The loop antennas of the first and second antennas 172a and 174a form one closed loop by the coaxial cable 176a. The coaxial cable 176a may correspond to the wiring described with reference to FIG. 5.

The coaxial cable 176a penetrates a portion of the switchboard, such as a predetermined portion of the distribution box, and is fixedly coupled to the distribution box by the fixture 178. The coaxial cable 176a is disposed at the center of the first fixture, and at each end thereof, a connector (not shown) coupled to the first connector 171 of the first antenna 172a and a second of the second antenna 174a. Connectors (not shown) coupled with the connector 173 may be provided respectively.

In one embodiment, the fastener 178 is a pair of a first fastener located on the inside of the switchboard and a second fastener located on the outside of the switchboard, and are coupled and fixed on both sides of the wall of the distribution box. The first fastener may have a bolt shape and the second fastener may have a nut shape.

As described above, the preferred embodiment of the present invention has been disclosed through the detailed description and the drawings. The terms are used only for the purpose of describing the present invention and are not used to limit the scope of the present invention as defined in the meaning or the claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this specification. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

100: intelligent switchboard
110: distribution box
120: track breaker
130: track test
140: switch unit
150: radio recognition tag
170, 170a: relay

Claims (9)

In the switchboard having a mechanical mechanism for distributing power,
A line breaker that disconnects the incoming line and the distribution line;
A line test unit for testing a state of the distribution line by applying a test signal to the distribution line;
A radio recognition tag coupled to the line test unit and storing a test result of the line test unit;
A distribution box for storing the line breaker, the line test unit, and a radio recognition tag; And
A relay unit arranged to connect the inside and outside the distribution box in order to extend the communication distance between the RFID tag and the reader located outside the distribution box.
Intelligent switchboard comprising a. The method of claim 1,
The line test unit is a switch unit for selectively connecting to the distribution line
Intelligent switchboard comprising a. The method of claim 2,
The line test unit comprises a signal generation unit for generating the test signal; A recording unit for storing the test result in the RFID tag; And a control unit for controlling the switch unit, the signal generation unit, and the recording unit. The method of claim 3,
The radio recognition tag is integrally coupled to the line test unit,
The recording unit and the radio tag is an intelligent switchboard and tag of a single RFID recognition. The method of claim 2,
The line test unit applies the test signal of a voltage or current waveform of a predetermined pattern to one or more lines of the distribution line through the switch unit in the inactive state of the line breaker, and the voltage or current waveform fed back to one or more other lines And detecting, comparing the signal applied as the test signal with the detected signal, and determining the state of the distribution line according to the comparison result. The method of claim 1,
The radio recognition tag,
A storage unit which stores information regarding the distribution box or the distribution line and the test result;
An input unit receiving a signal related to the test result from the line test unit;
A control unit coupled to the storage unit and the input unit, for communicating with an external device located outside the line test unit and the distribution box, and controlling an output of information stored in the storage unit; And
Intelligent switchboard including an antenna connected to the control unit. The method of claim 1,
The relay unit,
A first antenna inductively coupling with the antenna of the RFID tag;
A second antenna disposed away from the first antenna and electromagnetically coupled to the antenna at the reader; And
A wiring for connecting the first and second antennas to form a closed loop, the wiring for transmitting induced currents generated in the first and second antennas to the second and first loop antennas, respectively; Intelligent switchboard. The method of claim 7, wherein
The wiring is an intelligent switchboard comprising a coaxial cable. The method of claim 8,
An intelligent switchgear surrounding the coaxial cable and further comprising a fixture for fixing the relay box to the distribution box.

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