KR101274166B1 - System and method for distinguishing the phase of wires - Google Patents

Abstract

The present invention can provide a system that can determine the phase of the customer incoming line by using a track searcher that can be installed and operated on the transformer and a track search terminal that can be installed and operated on the customer side.
Furthermore, by remotely managing the phase information of the customer incoming line, it is possible to provide a system that can immediately respond to power accidents.
The phase determination system of a customer incoming line according to the present invention includes: a line searcher installed on each side of a distribution line and generating a terminal search signal including phase information of the distribution line; And a track search terminal for transmitting a terminal response signal including customer identification information to the track searcher in response to the terminal search signal.

Description

SYSTEM AND METHOD FOR DISTINGUISHING THE PHASE OF WIRES}

The present invention relates to a system and method for determining the phase of a customer incoming line, and more particularly, to a system and method for determining the phase of a customer incoming line by using power line communication or by sensing a current change in a load stage.

In order for the electricity produced at the power plant to be supplied to the end consumer, 22.9 kV of extra high voltage electricity must be stepped down through the transformer to 220V for single phase and 380V for three phases. The forced electricity is supplied to the customer through overhead lines or underground lines. In this case, the underground transformer and the ground transformer for supplying electricity to the customer are connected to the customer through the overhead line or the underground line. In the actual distribution system, there is a difficulty in determining which line between the customer and the transformer is connected.

In the case of overhead lines, it is possible to match transformers with customers by visually tracking the lines, but it is difficult to secure reliability due to human error, and underground lines are buried in power outlets, making it easy to identify with eyes. not.

As a result, it is difficult to take prompt measures in the event of a power accident, and it is difficult to solve the load imbalance of the transformer because it is impossible to know which transformer is connected to the customer. In addition, even when performing power line communication, there is a problem that it is difficult to grasp the phase information connected between the two terminals, it is difficult to determine the optimum communication path.

An object of the present invention is to provide a system that can determine the phase of the customer incoming line by using a track searcher that can be installed and operated on the transformer and a track search terminal that can be installed and operated on the customer side.

Further, another object is to provide a system that can remotely manage the phase information of the customer incoming line to respond immediately to the power accident.

The first invention of the present invention, the phase determination system of the customer incoming line, which is devised to solve the above object, is installed in each phase of the distribution line, the line searcher for generating a terminal search signal containing the phase information of the distribution line ; And a track search terminal for transmitting a terminal response signal including customer identification information to the track searcher in response to the terminal search signal.

The second invention of the present application, the phase determination system of the customer incoming line, the load end; A line search terminal connected to a lead line of a customer to change a current of the load end; And a line searcher installed on each of the distribution lines to sense a change in current of the load terminal and to transmit phase information of the incoming line to the line search terminal.

In accordance with a third aspect of the present invention, there is provided a method for determining a phase of a customer incoming line, the method comprising: a) a line searcher transmitting a terminal search signal including phase information of a distribution line to a line search terminal; And b) transmitting, by the track search terminal, a terminal response signal including customer identification information in response to the terminal search signal.

The fourth invention of the present invention, the method for determining the phase of the customer incoming line, a) the step of the line search terminal to change the current of the load terminal through the relay; And b) the line searcher detects a change in current at the load stage and transmits a phase information signal including phase information of a customer incoming line.

According to the present invention according to the above configuration, there is an effect that can provide a system that can determine the phase of the customer incoming line.

In addition, it is possible to effectively respond to power accidents by determining the phase of the customer incoming line, furthermore, there is an advantage that can provide an effective communication path in performing power line communication.

1 is a schematic diagram of a phase determination system of a consumer side overhead line according to an embodiment of the present invention;
2a shows a data frame structure of a terminal discovery signal;
2b is a data frame structure of a terminal response signal;
3 is a schematic diagram of a phase determination system of a customer side underground incoming line according to an embodiment of the present invention;
4 is a block diagram of a track searcher according to an embodiment of the present invention;
5 is a block diagram of a track search terminal according to an embodiment of the present invention;
6 is a flowchart of a method of determining a phase of a customer incoming line using power line communication according to an embodiment of the present invention; and
7 is a flowchart illustrating a method of determining a phase of a customer incoming line using a change in current of a load stage according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

≪ Example 1 >

1 is a schematic diagram of a phase determination system of a customer side overhead line according to an embodiment of the present invention. Referring to FIG. 1, a phase determination system of a customer incoming line includes a line searcher 110 installed in a transformer and a line searcher 110 installed in a customer to generate a terminal search signal to determine a phase of a customer incoming line. And a line search terminal 120 for transmitting an identification search signal. The phase determination system of the incoming line may further include an upper server 130.

The line searcher 110 is installed in each of the three-phase distribution lines built in a transformer. In the case of a single-phase transformer installed in a pole, three different transformers are installed on each pole, and thus, a single line detector 110 is built into each single-phase transformer, and in the case of a three-phase transformer, each distribution line The three track searchers 110 are built so that the track searchers 110 can be assigned to each track.

The line searcher 110 is installed on each of the distribution lines, and generates a terminal search signal including identification information of a pole installed with a transformer or a transformer along with phase information of the distribution line, and transmits it to the line search terminal. The line searcher 110 transmits a terminal search signal at predetermined time intervals, or transmits a terminal search signal based on an upper server 130 and an external input. In this case, the power line communication method is applied between the line searcher 110 and the line search terminal 120 so that the terminal search signal arrives only for a customer connected to the power line.

For example, as shown in FIG. 2A, the terminal discovery signal may include information on the phase of the distribution line together with the pole identification number. In FIG. 2A, 9112S461 indicated in the first frame is an identification number of a pole installed with a corresponding transformer, and B phase indicated in a second frame means that the transformer is a transformer connected to a distribution line on B. In the case of a single-phase transformer, three poles are installed in one pole, and thus, including the identification number of the transformer may cause management confusion, so that the pole number rather than the transformer information may be assigned to the first frame. However, assigning the pole number to the first frame is only one example for easily explaining the invention, and not only the pole number but also the data of the transformer or the combination of the pole and the transformer's identification number. May be

The line search terminal 120 is installed at a customer, receives a terminal search signal from the line searcher 110, and transmits a terminal response signal corresponding thereto to the line searcher 110. The track search terminal 120 may be a fixed type installed in a customer, or may be in a form of a portable type connected to the customer as needed.

As illustrated in FIG. 2B, the terminal response signal corresponding to the terminal discovery signal may further include data for identifying a customer in the terminal discovery signal. For example, 110461 displayed in the first frame of FIG. 2B represents the customer number of the customer. As such, the data for identifying the customer may be a management number or a customer number of the customer, or an identification number of the line search terminal 120. It can be one.

Here, the customer number of the customer means a unique identification number assigned to manage the customer subscribed by KEPCO, and the management number of the customer may be arbitrarily assigned for convenience of operating the track search terminal and may be changed as necessary. Any identification number.

When the track search terminal 120 is operated in a portable manner, the track search terminal 120 may be used as data for identifying a customer, but in this case, the search terminal may not secure identification information of the customer. . However, in the case of using the management number or customer number of the customer as the data for identifying the customer, there may be an additional advantage that the search terminal can match and store the data of the customer incoming line with the customer information.

Including the identification number and phase information of the pole (or transformer) of the terminal search signal in the terminal response signal is to minimize the transmission error that can occur during data transmission and reception. Even if the terminal search signal transmitted by the line search terminal 120 is transmitted to another line searcher 110 due to an external factor such as an interference signal, the line searcher 110 can identify the identification number and phase information of the pole included in the terminal response signal. Through this, it can be determined whether it is a response signal to the terminal discovery signal generated by itself.

When the track searcher 110 receives the terminal response signal, the track searcher 110 stores the phase connection information of the corresponding customer, and transmits an acknowledgment signal to the track search terminal 120. When the line search terminal 120 receives the acknowledgment signal, the line search terminal 120 also stores phase information of the incoming line. The acknowledgment signal may include data to identify the consumer. As in the case of the track searcher 110, the track search terminal 120 also checks whether the response is a response to a signal generated by itself, so as to minimize a transmission error that may occur during data transmission and reception. The line search terminal 120 checks the data for identifying the customer included in the acknowledgment signal, confirms whether it is a response to the data generated by the track search terminal, and stores the phase information of the corresponding line.

In FIG. 1, the present invention will be described with reference to overhead lines. However, as shown in FIG. 3, it should be appreciated that the present invention can be applied to underground lines. As in the case of the overhead line, the phase of the incoming line of the customer can be determined by installing the line searcher 310 on each of A, B, and C of the underground line and installing the line search terminal 320 on the customer side. . However, in the case of underground lines, the identification information of the transformer or the identification information of the track searcher is used for the terminal search signal instead of the identification information of the pole.

<Example 2>

Although the phase determination system of the customer incoming line of FIGS. 1 and 3 determines the phase of the customer incoming line using power line communication, the load current of the line search terminal is randomly changed, and the line searcher detects the change of the load current. The method may also perform the phase determination of the incoming line of the consumer.

In this case, the line searcher includes a current transformer (CT) for measuring the load current on the consumer side, and the line search terminal is embedded in the line search terminal or may be connected to the line search terminal from the outside. It includes more. The line search terminal uses a relay to determine whether to supply current to the load stage.

Referring to FIG. 1 by way of example, first, in the case of the line search terminal 120 installed on the customer side, the supply of current to the load terminal is controlled through a relay. The load stage consumes power to change the magnitude of the load current, and may be, for example, an object such as a heating element. When the relay is turned on to supply current to the heating element, the heating element generates heat and consumes a lot of power, thereby increasing the load current. When the relay is turned off and the current supply to the heating element is released, the load current is also reduced. When the line search terminal 120 repeatedly performs the on / off of the relay, the load current takes the form of a square wave.

The line detector 110 detects a square wave of a predetermined pattern by varying the magnitude of the load current on the consumer side, and when the square wave is detected, transmits a phase information signal including phase information of a distribution line to a power line communication or an RF module. It is transmitted to the track search terminal 120 through. The line search terminal 120 may receive a phase information signal from the line searcher 110 to determine an image of a customer's incoming line.

When implementing the phase determination system of the customer incoming line using the load current, it is preferable that it is a portable type that can be installed and operated in the customer as needed. In this case, the track searcher 110 has an advantage that data can be transmitted to the track search terminal 120 through broadcasting even without confirming a specific communication position with the track search terminal 120.

When the line search terminal 120 repeatedly performs the on / off of the relay, the load current of the load end becomes a square wave shape, and may transmit certain data to the line searcher 110 by using this as a digital signal. . For example, when the relay is turned on and the time when the load current is high is high as the digital signal, and when the relay is turned off as the low load current as the digital signal, the data can be transmitted to the line searcher 110. The data generated by the line search terminal 120 through the square wave of the load current may be an ID number of the line search terminal 120 or a customer number of a customer. When the line search terminal 120 generates the customer number of the customer through the square wave of the load current, the line searcher 110 may store and manage phase information for each customer. In this case, however, the preamble signal must be generated in advance so as to notify the line searcher 110 that the data transmission will be started.

In the first and second embodiments, the track searcher 110 or the track search terminal 120 may transmit the stored customer information and the phase information to the higher server 130. The upper server 130 and the track searcher 110 or the track search terminal 120 use wireless communication such as CDMA, Trunked Radio Service (TRS), or a wired communication method using a hybrid fiber coax (HFC) network. Can be. The upper server 130 may be a new distribution information system (NDIS) server used in KEPCO.

<Example 3>

4 is a block diagram of a track searcher according to an embodiment of the present invention. Referring to FIG. 4, the line detector includes a central processing unit 410, a power line communication unit 420, a storage unit 430, a power supply unit 440, a current transformer 450 for a meter, a transformer for a meter 460, and a short range communication unit. 470 and a long distance communication unit 480. The line searcher is installed in each distribution line and is embedded in a transformer, and can perform power line communication with a line search terminal connected to the distribution line.

The central processing unit 410 controls each function unit and performs signal processing. The central processing unit 410 generates a terminal search signal including the phase information of the corresponding line and the identification number of the pole or transformer, and transmits it to the line search terminal through the power line communication unit 420. The power line communication unit 420 is a kind of power line communication modem for performing power line communication with the consumer terminal, and in order to distinguish between the terminal search signal and the current signal, a frequency band different from the current frequency band (60 Hz), for example, about 1M to Perform communication using the 30MHz band.

When the power line communication unit 420 receives the terminal response signal from the line search terminal, the central processing unit 410 analyzes the data included in the terminal response signal and checks whether the information is generated by the corresponding line searcher. The storage unit 430 matches and stores the phase information of the customer-side incoming line together with the identification information of the customer.

Instrument current transformer 450 and instrument transformer 460 to measure the voltage and current value of the line, to detect the operating state of the line, the short-range communication unit 470, to communicate with a terminal of a nearby worker It is for. The nearby worker may determine the abnormality of the line by receiving the voltage and current value of the corresponding line through communication with the short-range communication unit 470, and may check the phase information of the incoming line for each customer. In this case, the short range communication unit 470 may be an RF communication module such as Bluetooth, Zigbee, or the like. The long-distance communication unit 480 is to transmit the information stored in the line searcher to the upper server 130, and may transmit voltage and current values of the corresponding line to the upper server 130 or transmit phase information of an incoming line for each customer. . In this case, the long-distance communication unit 480 may use a wireless communication method of the CDMA, TRS method, or a wired communication method such as an HFC network.

The line searcher may generate a terminal search signal at a predetermined time interval and transmit the search signal to a signal search terminal, or generate a terminal search signal by receiving a command from a terminal of a higher server 130 or an external worker, and transmit the search signal to a signal search terminal.

When the current information of the load search terminal is sensed to determine the phase information of the customer-oriented incoming line, when the current transformer 450 for the instrument detects a change in the load current of the line search terminal of a predetermined pattern, the central processing unit 410 The phase information on the incoming line is transmitted to the line search terminal using the power line communication unit 420 or the short range communication unit 470. In this case, the current change of the load stage sensed by the instrument current transformer 450 may be treated as a digital signal, and the central processing unit 410 may extract digital data from the corresponding waveform. A customer side identification number, for example, customer information or an identifier of a track search terminal can be extracted, and the extracted customer side identification number is stored in the storage unit 430 together with the phase information and provided to the upper server 130 or the worker. Can be.

5 is a block diagram of a track search terminal according to an embodiment of the present invention. Referring to FIG. 4, the line searching terminal includes a second central processing unit 510, a second power line communication unit 520, a second storage unit 530, a second power supply unit 540, a relay 550, and a load terminal. 560, a second local area communication unit 570, a second long distance communication unit 580, a key input unit 590, and a display unit 595.

When the power line communication unit 520 receives the terminal search signal from the line searcher, the second central processing unit 510 generates a terminal response signal including identification information of the customer. The identification information of the customer may be a customer number, a unique number assigned to the track search terminal, and may be input through the key input unit 590 and stored in the second storage unit 530. The second central processing unit 510 generates a terminal response signal including the pole identification number and the phase information received from the terminal search signal together with the identification information of the customer stored in the second storage unit 530, and the second power line communication unit ( The transmission may be transmitted to the discovery terminal through 520. When the second power line communication unit 520 receives the acknowledgment signal, the second central processing unit 510 stores the phase of the incoming line in the second storage unit 530. In this case, the external worker may display the customer information and the phase information stored in the second storage unit 530 on the display unit 595 through the manipulation of the key input unit 590.

The second power supply unit 540 is for supplying power to each functional unit. The second power supply unit 540 may be a rechargeable battery, or may be a concept including an outlet that may be connected to a commercial power source and a converter that converts an AC voltage into a DC voltage.

When the phase of the incoming line is to be determined through the change of the current, the second central processing unit 510 controls the relay 550 connected to the load stage 560 to supply / disconnect current to the load stage 560. Perform iteratively. In this case, the second central processing unit 510 may display identification information of the customer by utilizing the current value supplied to the load terminal 560 as a digital signal. When the search terminal detects a change in the load current and transmits phase information, the second central processing unit 510 receives the phase information of the incoming line through the second power line communication unit 520 or the second short range communication unit 570. The received phase information is stored in the second storage unit 530.

The load stage 560 may be installed in a form that is embedded in the track search terminal, but may be implemented in a form that is connected to the track search terminal from the outside.

The line search terminal may transmit the phase information of the incoming line stored in the second storage unit 530 to the higher server 130 through the second long distance communication unit 580.

<Example 4>

6 is a flowchart illustrating a method of determining a phase of a customer incoming line using power line communication according to an embodiment of the present invention. Referring to FIG. 6, first, the terminal search signal generation / transmission step is a step in which the line searcher generates a terminal search signal and transmits the terminal search signal to the track search terminal (S610). The terminal search signal may include phase information of a distribution line on which a line searcher is installed, and may further include an identification number of a pole / transformer in which the corresponding line searcher is installed, or an identification number unique to the search terminal.

The terminal response signal generation / transmission step is a step in which the track search terminal generates a terminal response signal in response to the terminal search signal of the track searcher and transmits the terminal response signal to the track searcher (S620). The terminal response signal may further include data for identifying the customer in data of the terminal response signal, for example, a customer number, a management number of the customer, and the like. The search terminal may check whether the data is to be received by the terminal search signal included in the terminal response signal, for example, the pole identification number or the identification number and phase information of the transformer. The line searcher receives the terminal response signal, matches the identification information and the phase information of the corresponding customer, and stores the matching information in the storage unit.

The acknowledgment signal generation / transmission step is a step in which the track searcher transmits a reception response to the terminal search signal to the track search terminal (S630). The acknowledgment signal may include data to identify the customer, and the hand-search terminal may confirm that the data is to be received by the user through the data to identify the customer. When the line search terminal receives the acknowledgment signal, the line search terminal may store phase information of the incoming line.

<Example 5>

7 is a flowchart illustrating a method of determining a phase of a customer incoming line using a change in current of a load stage according to an embodiment of the present invention.

The load current changing step is a step in which the line search terminal controls the current flowing to the load terminal connected to the line search terminal through the relay (S710). The line search terminal determines whether the current is supplied to the load terminal according to the on / off of the relay. At this time, the on / off of the relay may be treated as a digital signal to transmit predetermined data to the line searcher. The data transmitted to the track searcher may be an identification number of the track search terminal, an identification number of the customer, or a customer number of the customer.

In the load current sensing step, the line detector detects a current change of the load stage through the current transformer for the instrument (S720). The load current may detect a line search terminal associated with a corresponding distribution line by detecting a current change of a predefined pattern.

In the phase information signal transmitting step, when the line searcher detects a change in current at the load end, the line searcher transmits a signal including phase information of the corresponding distribution line to the line search terminal by using RF communication or power line communication (S730).

In the data processing step, the track searcher extracts and stores data for identifying a customer from the digital signal, and the track search terminal receives the phase information signal to store phase information of the corresponding customer incoming line (S740).

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

Although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto, and the technical spirit of the present invention and the claims to be described below by those skilled in the art to which the present invention pertains. Various modifications and variations are possible within the scope of equivalents.

110: track searcher
120: track search terminal
130: parent server
310: track searcher
320: track search terminal
330: parent server
410: central processing unit
420: power line communication unit
430: storage unit
440: power supply
450: Current transformer for the instrument
460: Instrument Transformer
470: near field communication unit
480: long distance communication unit
510: second central processing unit
520: second power line communication unit
530: second storage unit
540: second power supply
550: relay
560: load stage
570: second local area communication unit
580: second long distance communication unit
590: key input unit
595 display unit

Claims (15)

A line searcher installed on each distribution line and generating and transmitting a terminal search signal including phase information of the installed distribution line; And
A line search terminal installed at a customer side and receiving a terminal search signal to determine a phase of a distribution line connected to the installed customer, and returning a terminal response signal including the customer identification information of the installed customer to the track searcher; ,
And the line searcher matches and stores the phase information with the customer identification information when the terminal response signal is received.
The method of claim 1,
The terminal search signal further includes at least one of an identification number of the line searcher, an identification number of a transformer provided with the line searcher, and an identification number of the pole installed with the transformer,
The track search terminal receives the terminal search signal and stores the phase information by matching the phase information with at least one of an identification number of the line searcher, an identification number of a transformer provided with the line searcher, and an identification number of a pole installed with the transformer. Characterized in phase determination system of the customer incoming line.
The method of claim 1,
The customer identification information is a phase determination system of the customer incoming line, characterized in that any one of the identification number of the track search terminal, the customer number of the customer, and the management number of the customer.
3. The method of claim 2,
And the terminal response signal further includes phase information of the distribution line and an identification number of the transformer or an identification number of the pole.
The method of claim 1,
And a communication method between the line searcher and the line search terminal is power line communication.
The method of claim 1,
And when the track searcher receives the terminal response signal, transmits an acknowledgment signal to the track search terminal.
The method according to claim 6,
And the acknowledgment signal includes the customer identification information.
Load stage;
A line search terminal connected to a lead line of a customer to change a current of the load end; And
It is installed on each of the distribution line and includes a line detector for detecting the current change of the load terminal, and transmits the phase information of the incoming line to the line search terminal,
The line search terminal receives the phase information, determines a phase of a connected customer incoming line, and returns a terminal response signal including the customer identification information of the connected customer to the line searcher.
And the line searcher receives the terminal response signal and matches the phase information with the customer identification information and stores the phase information.
The method of claim 8,
The load stage is a phase determination system of the customer incoming line, characterized in that the heating element.
The method of claim 8,
The communication method between the line search terminal and the line search system is a wireless communication or power line communication using an RF communication module phase determination system of a customer incoming line.
The method of claim 8,
The line search terminal is a phase determination system of a customer incoming line, characterized in that for handling the current change of the load stage as a digital signal to transmit customer identification information to the line search.
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