KR101058121B1 - System and method for searching a low voltage live wire - Google Patents

Abstract

PURPOSE: A system for searching a live low voltage wire and a method thereof are provided to minimize costs for maintaining low voltage wires, thereby shortening maintaining time. CONSTITUTION: An electronic load device(100) is installed in one of live power wires. The electronic load device generates a signal with a specific pattern. A measuring device is installed in one of live power wires. The measuring device detects a current waveform and determines whether the signal with the specific pattern is included in the detected current waveform to detect the power line in which the electronic load device is installed. The electronic load device includes a power input unit(110), a power rectifying unit(120), a power controller(130), a signal generator(140), and a load(150).

Description

Live low voltage cabling system and method {SYSTEM AND METHOD FOR SEARCHING A LOW VOLTAGE LIVE WIRE}

The present invention relates to a low voltage wiring search system and method, and more particularly, by easily detecting a power line to be detected in a complex underground / ground low voltage wiring, thereby minimizing the maintenance and maintenance of human and physical cost of the site low voltage distribution line maintenance work. The present invention relates to a live low voltage wiring search system and method that can reduce the time required for repair.

In general, power is generated from hydroelectric, thermal, and nuclear power plants, and is usually transmitted to substations around load-dense cities at super high voltages of 154kV, 345kV, or 765kV. To the transformer, just before the end-user side. The distribution transformer is converted to a final voltage of 110V, 220V or 380V and supplied to the user's building via low voltage line.

These distribution transformers usually have overhead columnar transformers installed in Jeonju and ground transformers installed in urban underground supply areas. Among these, the processing columnar transformer is relatively small in capacity (out-of-town area) and easy to install or expand, whereas it is very dangerous to install and supply high-voltage distribution lines in Jeonju in the crowded city center. Install power outlets, install power distribution lines in the ground, and supply ground power transformers at regular intervals. Ground transformers are installed with large capacity transformers and supply power due to limited excavation and occupied space.

The low voltage power line draws the voltage 110/220 / 380V converted from the overhead columnar transformer or the ground transformer into the end user building through the overhead or underground path to reach the user. As such, the low voltage line installed in the processing can be visually confirmed, but the low voltage line embedded in the ground cannot be visually identified, and since there are many branch circuits in the ground, it requires considerable time and effort. Moreover, even when the low voltage line provided in the process is abundantly entangled in many low pressure lines, it is difficult to confirm like a ground line. This problem is particularly challenging for detecting live power lines in use by users at specific locations.

The present invention has been made to solve the above problems, an object of the present invention is to connect a power line connected to a user at a specific position of the underground line or a complicated overhead line installed in the field of the electrical installation, or a plurality of meters installed in the collective instrument box, The present invention provides a live wire search system and method for easy navigation while maintaining a live state.

In accordance with another aspect of the present invention, a live line search system according to the present invention includes an electronic load device installed at any one end of a plurality of live line power lines and generating a signal of a specific pattern; And a power line provided with any one of the plurality of live lines, detecting a current waveform, and determining whether a signal of the specific pattern is included in the detected current waveform. It is characterized by including a detection device for detecting.

The electronic load device may include a power input unit configured to receive a current from an end of any one of the plurality of live power lines; A power rectifier connected to the power input unit and rectifying the applied current; A signal generator for generating a signal of the specific pattern; A power control unit connected to the power rectifying unit and the signal generator and amplifying the signal in the rectified current; And a load connected to the power control unit and consuming and controlling a current including the signal.

In this case, the signal of the specific pattern may be encrypted using the principle of Code Division Multiple Access (CDMA) or in combination with a pseudo random noise sequence code (PSE).

The measuring device may further include: a current sensor installed at any one of the plurality of live power lines and measuring a current waveform; A signal amplifier connected to the current sensor and amplifying a signal included in the measured current; An A / D converter connected to the signal amplifier and digitizing the amplified signal; A micro-processing unit connected to the A / D device and extracting the original signal by decrypting the cipher when the digitized signal is encrypted; And a display unit connected to the micro process calculator and displaying the original signal.

The electronic load device may be installed in parallel with one or more of no load, stationary load, and flow load.

Meanwhile, the live line search method according to the present invention includes the steps of: (a) generating a signal of a specific pattern in an electronic load device installed at any one end of a plurality of live line power lines; (b) feeding back the generated specific pattern of signals in the direction of the telephone pole of the power line provided with the electronic load device; (c) the electronic load device by detecting a current waveform and determining whether a signal of the specific pattern is included in the detected current waveform in a measuring device installed on any one of the plurality of live power lines; It characterized in that it comprises the step of detecting the power line is installed.

The step (a) may include: receiving current from any one user end of the plurality of live power lines at the power input unit (a1) included in the electronic load device; (a2) rectifying the applied current at a power rectifier connected to the power input unit; (a3) generating a signal of a specific pattern in the signal generator; (a4) amplifying and including the signal in the rectified current in a power control unit connected to the power rectifier and the signal generator; And (a5) consuming and controlling a current including the signal in a load device connected to the power control unit.

In this case, the signal of the specific pattern of step (a3) may be encrypted using the principle of Code Division Multiple Access (CDMA) or combined with Pseudo Random Noise Sequence Code. Can be.

In addition, the step (c) includes the steps of: measuring a current waveform in a current sensor included in any one of the plurality of live power lines (c1) included in the measuring device; (c2) amplifying a signal included in the measured current waveform by a signal amplifier connected to the current sensor; (c3) digitizing the amplified signal in an A / D converter connected to the signal amplifier; (c4) extracting the original signal by decrypting the cipher when the digitized signal is encrypted, in a micro process operation unit connected to the A / D converter; And (c5) displaying the digitized original signal on a display unit connected to the microprocessor operation unit.

The electronic load device of step (a) may be installed in parallel with one or more of no-load, stationary load, and flow load.

According to the present invention, by easily detecting the power line to be detected in the complex underground / ground low-voltage wiring, it is possible to minimize the human and physical costs of the field power line maintenance work as well as shorten the maintenance time.

1 is a schematic diagram of a live state low voltage wiring search system according to an embodiment of the present invention;
2 is a simplified diagram showing a loop relationship of a live low voltage wiring search system according to an embodiment of the present invention.
3 is a block diagram illustrating an electronic load device according to an embodiment of the present invention.
4 is a configuration block diagram of a measuring device according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a live state low-voltage wiring search system and method according to a preferred embodiment. In the following description, well-known functions or constructions are not described in detail to avoid unnecessarily obscuring the subject matter of the present invention.

In addition, the size of each component in the drawings may be exaggerated for the sake of explanation and does not mean a size actually applied.

1 is a schematic diagram of a live state low-voltage wiring search system according to an embodiment of the present invention. Referring to FIG. 1, in the live state low voltage wiring search sheath according to one embodiment of the present invention, the live state low voltage line output from the columnar transformer 20 installed in the telephone pole 10 forms the power line bundle 30. The bundle of power lines 30 is thus extended to the place where the user exists through the underground line buried tube or tunnel 40. In addition, the extended power line bundle 30 is branched to each user side. The electronic load device 100 is connected in parallel to a load of a specific user of each user, that is, a user using a power line to be detected. Such loads may include no load, government load, and floating load.

In addition, the measuring apparatus 200 is installed in any part of the power line bundle 30 which is close to the telephone pole direction. In this case, the measuring device 200 may be installed on any one power line included in the power line bundle 30 through the inlet 50 formed in the underground line embedding pipe or tunnel 40. For example, as shown in FIG. 1, when the specific power line desired by the detector is connected to the user C, the electronic load device 100 is installed in parallel to the load of the user C. And the measuring apparatus 200 is installed in any one power line close to the telephone pole 10 direction among the power line bundle 30. FIG. After the electronic load device 100 and the measurement device 200 are installed in this manner, and the electronic load device 100 generates a specific signal known to the user, the generated specific signal is transmitted through the power line connected to the user C. Is fed back in a direction. If the measuring device 200 is installed on the power line to which the user C is connected, the measuring device 200 may recognize the specific signal fed back and recognize that the power line is the power line connected to the user C. On the other hand, if the measurement device 200 as a result of the measurement, the feedback signal does not exist, or if the electronic load device 100 installed in the user C detects a specific signal that is different from the specific signal generated, the measurer to identify the measured power line You can see that it is not the power line you want. As a result, the measurement apparatus 200 may be installed in another power line, and the measurement may be repeated to search for which power line is connected to the user C.

2 is a simplified diagram showing a loop relationship of a live state low voltage wiring search system according to an embodiment of the present invention. Referring to FIG. 2, a feedback process of a power line formed between the measuring device 200 and the electronic load device 100 will be described in detail in a loop relationship. The power line between the measuring device 200 and the electronic load device 100 flows in the direction of the measuring device 200 through the power line 31 and the electronic load device 100 in which current flows in the direction of the electronic load device 100. It consists of a power line 33. The measuring device 200 is installed in this power line 31 or 33. Therefore, even when the power lines are complicated and the length of the power lines is long, a specific signal generated by the electronic load device 100 can be transmitted in the direction of the measuring device by such a loop. In addition, the specific signal is a power consumption waveform of a certain pattern known to the measurer, the type may be a simple current waveform, or may be an encrypted form. For example, an encrypted signal may be encrypted using the principle of code division multiple access (CDMA), or may have a similar noise characteristic as a pseudo random noise sequence code (random sequence), It can be secured by encrypting it in combination with a reproducible code. This particular signal is included in the alternating current waveform flowing through the power line and fed back through the power line 33 during the power line loop.

3 is a configuration block diagram of an electronic load device according to an embodiment of the present invention. Referring to FIG. 3, the electronic load device 100 according to an exemplary embodiment of the present invention may include a power input unit 110, a power rectifier 120, a power controller 130, a signal generator 140, and a load 150. ). More specifically, the power input unit 110 receives power from a user side of a power line to be measured by a user among a plurality of mixed live power lines. The power rectifier 120 is connected to the power input unit 110 to rectify the AC power to operate and control the internal electronic circuit of the electronic load device 100. The signal generator 140 generates a signal for controlling the current waveform so that the power control of the electronic load device 100 can be easily read by the measurer. As described above, the current waveform may be referred to as a power controller in the sense of controlling the current waveform. The power controller 130 is connected to the power rectifier 120 and the signal generator 140, and includes the signal generated by the signal generator in the rectified AC waveform applied from the power rectifier 120. In this case, the power controller 130 may amplify the signal generated by the signal generator 140 and then include it in the AC waveform. The result is a discernible AC waveform for the operator to read. The load 150 is connected to the power control unit 130 to perform a load operation using a power consumption resistor for controlling the AC waveform output from the power control unit 130.

4 is a configuration block diagram of a measuring device according to an embodiment of the present invention. Referring to FIG. 4, a measuring device according to an embodiment of the present invention may include a current sensor 210, a signal amplifier 220, an A / D converter 230, a micro process calculator 240, and a display unit ( 250). More specifically, the current sensor 210 is connected to the power line 33 fed back from the electronic load device by using a clamp sensor such as a clamp device around the power line (or a current sensor using a high sensitivity Hall sensor). Measure the flowing current waveform (or measure the current waveform flowing in power line 31 connected by a loop to feedback power line 33). If the measurement device is successfully installed on the power line to be detected, the measured current waveform may be a current waveform including a specific signal generated by the electronic load device 100. The signal amplifier 220 is connected to the current sensor 210 and amplifies a signal included in the current waveform measured by the current sensor 210. This is because the signal itself included in the current waveform measured by the current sensor 210 is a very weak signal, and thus needs to be amplified for A / D conversion and display performed later. An operational amplifier can be used for this amplification. The A / D converter 230 is connected to the signal amplifier 220 and digitizes the analog signal amplified by the signal amplifier 220. In this case, it is preferable to decompose and read the signal into 1024 signals (or read out at a higher resolution). The microprocessor calculator 240 is connected to the A / D converter 230 and, in addition to the digitization in the A / D converter 230, digitizes using a microprocessor (for example, using ATMEGA1280 of the ATMEL company). Digitize the analog signal), and calculate the signal to display on the display unit (described later). In addition, when the measured signal is encrypted using a CDMA or PN code, the microprocessor calculator 240 may perform a role of decrypting the original signal and extracting the original signal. The display unit 250 is connected to the microprocessor operator 240, and after the calculation is suitable for displaying a digitally converted or decrypted signal output from the microprocessor operator 240, the measurer identifies the signal. Mark it for convenience. It is preferable that this display unit 250 use a totalized LCD display device. As a result, the measurer compares the signal displayed on the display unit 250 with a specific signal corresponding to the power line to be detected, and installs the measuring device 200 on another power line in the case of mismatch and repeats the above-described process. In addition, when it matches, it recognizes that the power line in which the measuring device 200 is installed is the power line to be detected, and ends the power line detection operation. This allows the operator to easily detect the desired power line in a complex bundle of live power lines.

In the detailed description of the present invention as described above, specific embodiments have been described. However, various modifications are possible within the scope of the present invention. The technical spirit of the present invention should not be limited to the above-described embodiments of the present invention, but should be determined not only by the claims, but also by those equivalent to the claims.

10: power pole 20: pole transformer
30: bundle of power lines 40: underground line buried pipe or tunnel
50: inlet 100: electronic load device
200: measuring device 110: power input unit
120: power rectifier 130: power control unit
140: signal generator / power control unit 150: load
210: current sensor 220: signal amplifier
230: A / D conversion unit 240: micro process operation unit
250: display unit

Claims (10)

An electronic load device installed at any one end of a plurality of live power lines and generating a signal of a specific pattern; And
A power line provided with the electronic load device by detecting a current waveform and determining whether a signal of the specific pattern is included in the detected current waveform, provided at any one of the plurality of live power lines. Live state low-voltage wiring search system comprising a detection device. The method of claim 1,
The electronic load device,
A power input unit configured to receive a current from any one end of the plurality of live power lines;
A power rectifier connected to the power input unit and rectifying the applied current;
A signal generator for generating a signal of the specific pattern;
A power control unit connected to the power rectifying unit and the signal generator and amplifying the signal in the rectified current; And
And a load connected to the power control unit, the load consuming and controlling the current including the signal. The method of claim 2,
The signal of the specific pattern,
Live state low voltage wiring search system characterized in that encrypted using the principle of Code Division Multiple Access (CDMA), or in combination with Pseudo Random Noise Sequence Code (CDMA). The method of claim 1,
The measuring device,
A current sensor installed on any one of the plurality of live power lines and measuring a current waveform;
A signal amplifier connected to the current sensor and amplifying a signal included in the measured current;
An A / D converter connected to the signal amplifier and digitizing the amplified signal;
A micro-processing unit connected to the A / D device and extracting the original signal by decrypting the cipher when the digitized signal is encrypted; And
And a display unit connected to the micro process unit and displaying the original signal. The method according to any one of claims 1 to 4,
The electronic load device,
A live state low-voltage cabling system characterized in that it is installed in parallel with at least one of no-load, stationary, and flow loads. (a) generating a signal of a specific pattern in an electronic load device installed at any one end of a plurality of live power lines;
(b) feeding back the generated signal of a specific pattern in the direction of a telephone pole of a power line provided with the electronic load device;
(c) the electronic load device by detecting a current waveform and determining whether a signal of the specific pattern is included in the detected current waveform in a measuring device installed on any one of the plurality of live power lines; And detecting a power line provided with the live line low voltage wiring search method. The method of claim 6,
Step (a) is included in the electronic load device,
(a1) receiving a current from a user end of any one of the plurality of live power lines at a power input unit;
(a2) rectifying the applied current in a power rectifying unit connected to the power input unit;
(a3) generating a signal of a specific pattern in the signal generator;
(a4) amplifying and including the signal in the rectified current in a power controller connected to the power rectifier and the signal generator; And
and (a5) consuming and controlling a current in which the signal is included in a load device connected to the power control unit. The method of claim 7, wherein
The signal of the specific pattern of the step (a3),
A live state low voltage line searching method, which is encrypted using the principle of Code Division Multiple Access (CDMA) or combined with Pseudo Random Noise Sequence Code. The method of claim 6,
Step (c) is included in the measuring device,
(c1) measuring a current waveform in a current sensor installed on any one of the plurality of live power lines;
(c2) amplifying a signal included in the measured current waveform by a signal amplifier connected to the current sensor;
(c3) digitizing the amplified signal in an A / D converter connected to the signal amplifier;
(c4) extracting the original signal by decrypting the cipher when the digitized signal is encrypted, in a micro process operation unit connected to the A / D converter; And
and (c5) displaying the digitized original signal on a display unit connected to the microprocessor unit. The method according to any one of claims 6 to 9,
The electronic load device of step (a),
A method for searching live low voltage wiring, characterized in that it is installed in parallel with at least one of no-load, stationary load, and flow load.

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