KR101366761B1 - System for discriminating underground service conductor using harnonics and method thereof - Google Patents

Abstract

The present invention provides a system and method for identifying underground tug-in using high frequency which can grasp connection state through underground lead-in line between customer and ground transformer, and determine which phase of the transformer is connected to the customer. .
The present invention uses a high frequency underground lead line determination system comprising: a transmitter installed in a customer and transmitting preset harmonic signals and customer information through underground lead lines corresponding to any one of the power lines; And a receiver installed in the ground transformer and receiving harmonic signals and customer information transmitted from the transmitter connected through the underground lead wire and determining phase information of the underground lead wire connected to each customer.

Description

System and method for discriminating underground tugboat using harmonics {SYSTEM FOR DISCRIMINATING UNDERGROUND SERVICE CONDUCTOR USING HARNONICS AND METHOD THEREOF}

The present invention relates to a system and method for underground lead line determination using a high frequency to determine the transformer and phase information connected to the underground lead wire of the customer using a harmonic signal transmitted from the customer side.

The transmission and distribution of electric power is generally composed of three phase power lines, and in order to transmit electric power from the ground transformer to the underground customer, the power line of any one of the power lines on the secondary A, B and C of the ground transformer in the distribution system is connected to the underground customer. It is connected to the service wire.

In general, the distribution line can be largely divided into overhead lines and underground lines. Underground lines are more expensive to install and maintain than overhead lines, and are inadequate over long distances due to the large effects of capacitance and reactance. It is becoming a trend.

Underground distribution lines are difficult to secure buried route, and in order to bury the increasing track, many cables are often buried together in one tunnel. Therefore, it is difficult to find the corresponding cable among several cables when working with underground cables, and there is always a risk of an accident. In addition, underground distribution lines generally have a lower frequency of accidents than overhead lines, but they take much time to recover once an accident occurs. Since the time required to recover from an accident is linked to the power outage in the area, there is a need for a method or device that can quickly and accurately determine the life and loss of cables.

In order to determine the life and death of the cable, a current flowing through the cable is conventionally used. This method senses the current flowing by detecting the magnetic field around the cable by the current. In other words, when two workers communicate with each other through wireless communication, one person repeatedly turns on and off the cable at the cable inlet, and the other person at the work site detects a change in the magnetic field around the cable at that time. We measured the change and identified the cable we were working on. However, since such a method finds a cable by measuring the current flowing through the cable, there is a problem in that the cable cannot be found when the load is small and only the voltage is applied and no current flows. In addition, if there are a large number of cables, it is cumbersome and time consuming because the cable must be found several times.

The present invention provides a system and method for identifying underground tug-in using high frequency which can grasp connection state through underground lead-in line between customer and ground transformer, and determine which phase of the transformer is connected to the customer. .

The present invention uses a high frequency underground lead line determination system comprising: a transmitter installed in a customer and transmitting preset harmonic signals and customer information through underground lead lines corresponding to any one of the power lines; And a receiver installed in the ground transformer and receiving harmonic signals and customer information transmitted from the transmitter connected through the underground lead wire and determining phase information of the underground lead wire connected to each customer.

The receiver further includes a sensor installed one-to-one on each of the power lines to detect a harmonic signal, and a first MCU that determines phase information for each consumer using the customer information and the harmonic signal detected by the sensor. .

The receiver further includes a first communication modem for transmitting the phase information for each consumer to a new distribution information system (NDIS) under the control of the first MCU.

The receiver further includes a second communication modem for performing data communication with the transmitter and transmitting a setting signal for setting a harmonic signal transmitted from the transmitter under the control of the first MCU.

The receiver further includes a first display unit for displaying the customer-specific phase information and the harmonic signal transmitted from the transmitter to the outside.

When the receiver receives the harmonic signal, the receiver may return a response signal and receiver information to the transmitter that transmitted the harmonic signal.

The receiver information includes an identification number, phase information, and transformer identification information of the corresponding receiver.

The transmitter further includes a second MCU using the response signal and the receiver information to determine phase information of the ground transformer connected to the underground lead wire of the customer in which the transmitter is installed.

The transmitter further includes a second display unit for displaying the phase information of the ground transformer connected to the underground lead wire of the customer installed with the transmitter to the outside.

The present invention provides a method for determining an underground lead wire using harmonics, comprising: transmitting, by a transmitter installed in a consumer, a preset harmonic signal and customer information through an underground lead line corresponding to any one of the power lines; And receiving, by a receiver installed in the ground transformer, the harmonic signal and the customer information transmitted from the transmitter, and determining the phase information of the underground lead wire connected to the customer.

The determining may include detecting a harmonic signal through a sensor installed one-to-one on each of the power lines; Determining phase information of a sensor in which the harmonic signal is detected; And matching the consumer information and the prize information to determine the prize information of the consumer.

And returning, by the receiver, a response signal and receiver information to the transmitter which transmitted the harmonic signal.

And determining, by the transmitter, phase information of a ground transformer connected to the underground lead wire of the customer using the response signal and the receiver information.

The present invention can be used to determine the grounding line determination system and method using the high frequency of the present invention through the grounding line between the customer and the ground transformer, it is possible to determine whether the customer is connected to any phase of any transformer nearby.

1 is a conceptual diagram illustrating a connection relationship between a customer and a ground transformer according to an embodiment of the present invention;
2 is a block diagram of a receiver according to an embodiment of the present invention;
3 is a block diagram of a transmitter according to an embodiment of the present invention, and
Figure 4 is a flow chart of the operation of the underground line identification system using a high frequency in accordance with an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components, and the same reference numerals will be used to designate the same or similar components. Detailed descriptions of known functions and configurations are omitted.

1 is a conceptual diagram illustrating a connection relationship between a customer and a ground transformer according to an embodiment of the present invention, FIG. 2 is a configuration diagram of a receiver 10 according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. It is a block diagram of the transmitter 20 which concerns on an example.

The underground lead line determination system using harmonics according to an embodiment of the present invention includes: a transmitter (20) installed in a customer and transmitting preset harmonic signals and customer information through underground lead lines corresponding to any one of the power lines; And a receiver 10 installed in the ground transformer and receiving the harmonic signal and the customer information transmitted from the transmitter 20 connected through the underground lead wire and determining the phase information of the underground lead wire connected to each customer.

The transmitter 20 may be installed in a breaker in the receiver or a plug in an outlet according to the shape of the probe.

The transmitter 20 includes a harmonic generator 22 and may transmit a preset harmonic signal through a underground lead wire connected to the customer. The harmonic signal transmitted from the transmitter 20 may be set from the receiver 10 through a built-in wireless communication modem or through an external input through a keypad 23 attached to the transmitter 20.

The transmitter 20 may transmit customer information through the ground line along with the harmonic signal. The customer information may include a unique ID and a customer number or an instrument number of the transmitter 20, and may be set according to an external input through the keypad 23.

When the second MCU 21 of the transmitter 20 receives a response signal from the receiver 10, the receiver 10 is connected to which phase of the transformer by using the receiver 10 information received along with the response signal. Will be determined. Since the receiver 10 information includes the identification number, phase information, and transformer identification information of the receiver 10 that has transmitted the receiver 10 information, the second MCU 21 uses the transformer identification information to determine whether the customer has any information. It is connected to the transformer, it is possible to determine the phase information of the underground incoming line using the phase information.

The second display unit 24 of the transmitter 20 may display phase information of the ground transformer determined by the second MCU 21 to the outside, and display customer information, harmonic signals, and input information through the keypad 23. It can be displayed.

The receiver 10 is installed at the secondary power line of the ground transformer, and may detect harmonics transmitted from the transmitter 20 and determine phase information of underground lead wires connected to each customer.

The sensors 12 of the receiver 10 may be installed one-to-one on each power line to detect harmonics transmitted from each power line. In general, since the load current generated by the nonlinear load is composed of the sum of the fundamental wave components and the harmonic components, the sinusoidal waveform of the fundamental wave is distorted. This distortion is called distortion, and the degree of distortion is determined by the amount of the remaining components, that is, the DC component and the harmonic components, which are added to the fundamental wave and thus deform the sine wave.

The harmonic detection sensor 12 detects harmonic components after removing fundamental components included in a signal transmitted through each power line. The harmonic detection sensor 12 is an analog circuit composed only of passive elements such as OP-AMP, resistance, capacitance, and reactance. Or an integrated circuit (IC) for high-speed signal processing, such as a DSP (Digital Signal Processing) chip.

The first MCU 11 of the receiver 10 may use the harmonic signal and the customer information detected by the sensor 12 to determine the customer information connected to the power line on which the sensor 12 is installed through a ground lead. Since the customer information includes an ID and a customer number or an instrument number unique to the transmitter 20, the first MCU 11 matches the phase information of the power line on which the sensor 12 that detects the harmonic signal with the customer information. Phase information for each customer can be determined.

The first communication modem 13 of the receiver 10 may be a modem for Code Division Multiple Access (CDMA) and Trunked Radio Service (TRS) communication, and for each customer determined under the control of the first MCU 11. Phase information can be transmitted to a New Distribution Information System (NDIS).

The second communication modem 14 of the receiver 10 may be a modem for RF communication, and may transmit a setting signal for setting a harmonic signal transmitted from the transmitter 20 under the control of the first MCU 11. have. In addition, the receiver 10 may return the response signal and the receiver 10 information to the transmitter 20 that transmits the corresponding harmonic signal through the second communication modem. The second communication modem 14 may perform data communication with the transmitter 20, and may perform data communication by communicating with other portable terminals.

The first display unit 15 of the receiver 10 may display the harmonic signal transmitted by the transmitter 20 and the phase information for each customer to the outside.

When the receiver 10 receives the harmonic signal, the receiver 10 may return the response signal and the receiver 10 information through the corresponding ground lead line. The receiver 10 information may include an identification number, phase information, and transformer identification information of the receiver 10.

4 is an operation flowchart of the underground tugboat discrimination system using harmonics according to an embodiment of the present invention.

The transmitter 20 transmits preset harmonic signals and customer information through underground lead wires connected to the customer. The harmonic signal transmitted from the transmitter 20 may be a signal previously promised according to the actual signal of the receiver 10, or may be a signal set according to an external input of the transmitter 20 (S401).

The receiver 10 may detect a harmonic signal transmitted from the transmitter 20 through the sensor 12 connected to each phase of the power line (S402).

The receiver 10 determines phase information of each consumer through a process of matching phase information of a power line on which a harmonic signal is detected with consumer information (S403).

The receiver 10 returns the response signal and the receiver 10 information through the underground lead line connected to the power line receiving the harmonic signal (S405). The receiver 10 returns the response signal and the receiver 10 information through the second communication modem 14 when the information reply through the underground cable is not performed smoothly.

The transmitter 20 determines phase information of the ground transformer connected to the underground lead wire of the customer where the transmitter 20 is installed by using the identification information and the phase information of the transformer included in the receiver 10 (S406).

Embodiments of the present invention include computer readable media including program instructions for performing various computer implemented operations. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CDROMs, DVDs, and magnetic-optical such as floppy disks. Media, and hardware devices specially configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like.

As described above, the present invention has been described with reference to particular embodiments, such as specific elements, and specific embodiments and drawings. However, it should be understood that the present invention is not limited to the above- And various modifications and changes may be made thereto by those skilled in the art to which the present invention pertains. Therefore, the spirit of the present invention should not be construed as being limited to the described embodiments, and all of the equivalents or equivalents of the claims, as well as the following claims, are included in the scope of the present invention.

10: Receiver 11: first MCU
12: Sensor 13: first communication modem
14: second communication modem 15: first display unit
20: second MCU 21: harmonic generator
22: keypad 23: second display unit
100: ground transformer 200: customer

Claims (13)

A transmitter installed at a customer and transmitting a preset harmonic signal and customer information through a underground lead wire corresponding to one of the power lines; And
Receiver which is installed in ground transformer and receives harmonic signal and customer information transmitted from transmitter connected through underground lead wire and determines phase information of underground lead wire connected to each customer
Underground line determination system using harmonics including a.
The method of claim 1, wherein the receiver
A sensor installed one to one on each power line for detecting a harmonic signal;
And a first MCU configured to determine phase information for each customer using the customer information and the harmonic signal detected by the sensor.
The method of claim 2, wherein the receiver
And a first communication modem for transmitting the customer-specific phase information to a new distribution information system (NDIS) under the control of the first MCU.
The method of claim 2, wherein the receiver
And a second communication modem for performing data communication with the transmitter and transmitting a setting signal for setting a harmonic signal transmitted from the transmitter under the control of the first MCU.
The method of claim 2, wherein the receiver
And a first display unit configured to display the phase information for each customer and a harmonic signal transmitted from the transmitter to the outside.
The method of claim 1,
And the receiver receives harmonic signals, and returns a response signal and receiver information to a transmitter that has transmitted the harmonic signals.
The method according to claim 6,
The receiver information is a underground lead-in determination system using harmonics including the identification number, phase information and transformer identification information of the receiver.
8. The apparatus of claim 7, wherein the transmitter is
And a second MCU configured to determine phase information of the ground transformer connected to the underground lead wire of the customer in which the transmitter is installed by using the response signal and the receiver information.
The method of claim 8, wherein the transmitter
And a second display unit for displaying the phase information of the ground transformer connected to the underground lead wire of the customer where the transmitter is installed to the outside.
Transmitting, by a transmitter installed at a customer, a preset harmonic signal and customer information through a underground lead line corresponding to one of the power lines; And
Receiving a harmonic signal and customer information transmitted from the transmitter by a receiver installed in the ground transformer and determining phase information of the underground lead wire connected to the customer
Underground line determination method using harmonics comprising a.
The method of claim 10, wherein the determining is
Detecting a harmonic signal through a sensor installed one-to-one on each of the power lines;
Determining phase information of a sensor in which the harmonic signal is detected;
Determining the phase information of the customer by matching the customer information and the phase information.
Underground line determination method using harmonics comprising a.
11. The method of claim 10,
Sending, by the receiver, a response signal and receiver information to the transmitter which has transmitted the harmonic signal.
Underground line determination method using harmonics further comprising.
13. The method of claim 12,
The transmitter using the response signal and the receiver information to determine phase information of the ground transformer connected to the underground lead wire of the customer
Underground line determination method using harmonics further comprising.

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