KR102491259B1 - Underground transmission and distribution line safety inspection apparatus and the inspection method using the same - Google Patents

Abstract

The present invention relates to a safety inspection apparatus for underground transmission and distribution lines and an inspection method using the same. The safety inspection apparatus for underground transmission and distribution lines, according to the present invention, comprises: a transmission and distribution line; first, second, and third transpositions (31, 32, 33); a first lighting arrester (36); a second lighting arrester (37); a third lighting arrester (38); a first coil part (41); a second coil part (42); a third coil part (43); a signal supply and detection part (45) for the first coil part (41); a signal supply and detection part (46) for the second coil part (42); a signal supply and detection part (47) for the third coil part (43); and a main control part (49). Therefore, the safety of underground transmission and distribution lines can be easily inspected.

Description

Safety inspection device for underground transmission and distribution lines and inspection method using the same

The present invention relates to a safety inspection device for an underground transmission and distribution line and an inspection method using the same, which can quickly detect a failure of an underground line transmitting extra-high voltage and high power of 22.9kV, 154kV, 345kV and 765kV, and it can be detected by a manager's terminal ( Or a smart phone) to an inspection device and inspection method for improving the safety of power facilities.

Electrical energy is the most essential energy in our lives, and since all facilities in the home, industry, and country operate based on electrical energy, power facilities are the most important energy transmission facilities, and their importance and stable supply are essential day by day.

As related prior literature, Korean Patent Registration No. 10-0979636 (published on September 9, 2010, hereinafter referred to as [Patent Document 1]) proposed a wireless monitoring system for detecting abnormal current in transmission and distribution lines. In [Patent Document 1], a sensor unit for detecting voltage and current in a wireless monitoring system for detecting an abnormal current in a transmission and distribution line; battery charging unit; zero crossing to check the initial point of the current; power sensing unit; zero adjustment switch; A watch dog timer unit that protects the control unit from malfunctioning; resistive load unit; a non-volatile memory unit; Option S/W unit controlling master and slave; wireless power control unit; wireless module unit; LED display; control unit; A wireless monitoring system including a hook part that controls the current step by step through a sensing part for each step and conveniently installs and separates from a transmission and distribution line has been disclosed.

Republic of Korea Patent Registration No. 10-1200053 (published on November 12, 2012, hereinafter referred to as [Patent Document 2]) proposed a real-time diagnosis device and method for progressive abnormal conditions of transformers and insulators for power facilities. In the above [Patent Document 2], a device module configured to automatically report the abnormal state occurrence result to the upper system in the transformer enclosure; a data storage module that records and manages the history data for progressive abnormal conditions given by the control processing module by time zone and date; Progressive abnormal state of transformers and insulators for power facilities, characterized by dividing the 5KHz to 60KHz band section using a digital band pass and obtaining the total amount of ultrasonic energy through integration processing and error correction of all digital signal sizes within the section Diagnosis was released.

Republic of Korea Patent Registration No. 10-2436137, (published date August 26, 2022, hereinafter referred to as [Patent Document 3]) proposed an IoT system for monitoring the occurrence of arc discharge in transmission and distribution lines. In [Patent Document 3], each of the plurality of IoT sensor modules as an IoT system for monitoring arc discharge generation in a transmission and distribution line includes a harmonic measuring means; electromagnetic wave measuring means; means of communication; storage means; control means; An identification code capable of identifying each of the plurality of IoT sensor modules is stored in the storage unit; Transmitting a first signal to the monitoring server through the communication means; generating a second signal and transmitting it to all of the plurality of IoT sensor modules; Sending a third signal including the identification code and n measured harmonic values from the most recently stored harmonic measurement value to the nth harmonic measurement value in reverse order from among the harmonic measurement values stored in the storage means to the monitoring server; The monitoring server analyzes the first signal and the third signal to determine whether an arc discharge occurs and an occurrence point thereof, and an IoT system for monitoring arc discharge occurrence of a transmission and distribution line is disclosed.

In [Patent Document 1] to [Patent Document 3], abnormal current, arc discharge, and progressive abnormal state of transformers and insulators of transmission and distribution lines are sensed, but there is a limitation that abnormalities of transmission and distribution lines cannot be directly sensed.

Korean Registered Patent Publication No. 10-0979636, published on September 09, 2010 Republic of Korea Patent Registration No. 10-1200053, Publication Date November 12, 2012 Republic of Korea Patent Registration No. 10-2436137, Publication Date August 26, 2022

The present invention has been made to solve the above problems, and in order to prevent imbalance of line constants by replacing R, S, and T phases in a transmission and distribution line, transposition of changing the position of each phase is provided. It is performed, and the technical feature is that the proposed underground transmission and distribution line signal injection and detection system is applied to the transposition part. In particular, the first coil unit 41 for injecting a signal into a specific phase among the R phase, S phase, and T phase, and the second and third coil units 42 adjacent to the first coil unit 41 , 43) detects the signal injected into the first coil unit 41. In addition, the second coil unit 42 for injecting a signal after a first predetermined time and the first and third coil units 41 and 43 adjacent to the second coil unit 42 are connected to the second coil unit 42 . The signal injected into portion 42 is detected. In addition, a third coil unit 43 for injecting a signal after a second predetermined time and the first and second coil units 41 and 42 adjacent to the third coil unit 43 are connected to the third coil unit 43 . The signal injected into the portion 43 is detected. Through this, an object of the present invention is to provide a device and method for inspecting the safety of transmission and distribution preferences in real time.

In order to solve the above problems, the present invention is a safety inspection device for an underground transmission and distribution line, comprising: a transmission and distribution line composed of three phases: R phase, S phase, and T phase; First, second, and third transpositions 31, 32, and 33 that change the position of each phase to prevent imbalance of line constants by replacing the R, S, and T phases; a first lightning arrestor (36) for discharging an abnormal voltage to the ground when an abnormal voltage is generated in the first circuit 31; a second arrester (37) for discharging an abnormal voltage to the ground when an abnormal voltage is generated in the second circuit 32; a third lightning arrester (38) for discharging an abnormal voltage to the ground when an abnormal voltage is generated in the third circuit 33; a first coil unit 41 for supplying and detecting a signal to the first coil 31 of a specific phase among the R, S, and T phases; a second coil unit 42 for supplying and detecting a signal to the second coil 32 of a specific phase among the R, S, and T phases; a third coil unit 43 for supplying and detecting a signal to the third coil 33 of a specific phase among the R, S, and T phases; a signal supply and detection unit 45 of the first coil unit 41 supplying and detecting a signal of the first coil unit 41; a signal supply and detection unit 46 of the second coil unit 42 supplying and detecting a signal of the second coil unit 42; a signal supply and detection unit 47 of the third coil unit 43 for supplying and detecting signals of the third coil unit 43; a main controller 49 that remotely detects information obtained from the signal supply and detection units 45, 46, and 47 of the first, second, and third coil units; The main controller 49 uses an underground transmission and distribution line safety inspection device or inspection method characterized in that the safety of the underground transmission and distribution line is inspected based on the detection state of the signal as a solution to the problem.

First, the safety of the underground transmission and distribution line, which is difficult to confirm, can be easily inspected. Third, if an abnormality occurs in the underground transmission and distribution line, the safety of the underground transmission and distribution line is inspected by wirelessly sending an alarm to the manager's personal terminal or smart phone. has an increased effect.

1 is a cross-sectional view of a conduit type underground transmission and distribution line.
2 is a cross-sectional view of an electric power-type underground transmission and distribution line.
3 is a safety inspection device for the proposed underground transmission and distribution line.
4 is a proposed underground transmission and distribution line signal injection and detection system.
5 is a detailed configuration diagram of the proposed underground transmission and distribution line signal injection and detection system.
6 is a detailed configuration diagram of the proposed coil unit.

The present invention has been described with reference to the accompanying drawings for preferred embodiments. However, the embodiments of the present invention can be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below, and those of ordinary skill in the art can It is provided for complete explanation.

1 shows a cross-sectional view of a conduit type underground transmission and distribution line. In general, there is a conduit-type method as the simplest method of arranging transmission and distribution lines underground. In the conduit type, up to 9 underground transmission and distribution lines 12 are arranged inside the conduit case 14 of reinforced concrete below the ground 11, and sand 13 is arranged between the underground transmission and distribution lines 12 And, the upper part of the conduit case 14 is disposed with a cover part 15.

2 shows a cross-sectional view of an electric power-type underground transmission and distribution line. In the duct-type underground transmission and distribution line of FIG. 1, it is difficult to expand and replace the transmission and distribution line. However, the electric ball-type underground transmission and distribution line of FIG. 2 overcomes the limitations of the conduit-type underground transmission and distribution line, and has the advantage of being easy to expand and replace the transmission and distribution line. First and second holders 22-1 and 22-2 are disposed on the left and right sides of the reinforced concrete case of the electric power-type underground transmission and distribution line, and a walking passage 26 for a manager is disposed in the central portion. In the first and second holders 22-1 and 22-2, transmission and distribution lines 23 are disposed in the lower part, distribution lines 24 are disposed in the middle part, and communication lines 25 are disposed in the upper part. characterized by being

3 shows a safety inspection device for a proposed underground transmission and distribution line. The proposed underground transmission and distribution line consists of three phases, and power is supplied to the R-phase, S-phase, and T-phase underground transmission lines. In the case of the R phase, S phase, and T phase, transposition (31, 32, 33) is performed to change the position of each phase in order to prevent imbalance of line constants, and in the transposition part, the abnormal voltage In order to prevent this from occurring, it is technically characterized by being grounded to the ground (11) through the arresters (36, 37, 38). Therefore, grounding to the ground (11) through the transposition (31, 32, 33) and arresters (36, 37, 38) of each phase in this way prevents sudden abnormal voltage of the transmission and distribution line from occurring, and It has the advantage of solving the line constant imbalance and improving safety. However, it has a disadvantage that it is impossible to accurately detect the location where an abnormality occurs in a specific transmission and distribution line. Therefore, in the present invention, the first coil unit 41, the second coil unit 42, the third coil unit 42, etc. are placed next to each other in a specific phase. In general, since an extension is a point where each phase is changed in a transmission and distribution line, it is characterized in that a signal can be injected into a specific phase and the injected signal can be detected at this part. Therefore, a technical feature is to inspect the safety of transmission and distribution lines by injecting a variable frequency of tens of Hz to hundreds of kHz in a specific coil unit and detecting it in another coil unit. To this end, a signal supply and detection unit 45 of the first coil unit is located in the first coil unit 41, and a signal supply and detection unit 46 of the second coil unit is located in the second coil unit 42. In the third coil unit 43, the signal supply and detection unit 47 of the third coil unit is located, and the signal supply and detection units 45, 46 and 47 of the first, second and third coil units ) performs communication with the main controller 49 wirelessly. The main control unit analyzes whether an abnormality occurs at a specific point of the underground transmission and distribution line based on the signals detected by the signal supply and detection units 45, 46, and 47 of the first, second, and third coil units. It performs the function of a central server that can perform the function of the central server (Server), and transmits the information to the manager's personal terminal or smart phone when an abnormality (異常) of the underground transmission and distribution line is detected.

4 shows the proposed underground transmission and distribution line signal injection and detection system. The underground transmission and distribution line signal injection and detection system can be placed in a specific phase desired by the manager among R phase, S phase, and T phase, and if necessary, all phases of R phase, S phase, and T phase can be placed. In the first coil unit 41, the signal supply and detection unit 45 of the first coil unit is located, and in the second coil unit 42, the signal supply and detection unit 46 of the second coil unit is located. In the three-coil unit 43, a signal supply and detection unit 47 of the third coil unit is located, and the signal supply and detection units 45, 46, and 47 of the first, second, and third coil units are Communication with the main controller 49 is performed wirelessly. The main control unit analyzes whether an abnormality occurs at a specific point of the underground transmission and distribution line based on the signals detected by the signal supply and detection units 45, 46, and 47 of the first, second, and third coil units. It performs the function of a central server that can perform the function of a central server (Server), and transmits the information to the manager's personal terminal or smart phone when an abnormality (異常) of the underground transmission and distribution line is detected.

5 shows a detailed configuration diagram of the proposed underground transmission and distribution line signal injection and detection system. First to fourth switches S1 to S4 for supplying signals of variable frequency to the first, second or third coil units 41, 42, and 43 in the underground transmission and distribution line safety inspection device are disposed. When the first switch S1 and the second switch S2 of the first to fourth switches S1 to S4 are turned on, the third switch S3 and the fourth switch S4 are When the third switch (S3) and the fourth switch (S4) are turned on, the first switch (S1) and the second switch (S2) are turned off. Complementary operation that becomes a turn-off is a technical feature. Through this, a variable frequency of tens of Hz to hundreds of kHz can be supplied to the specific coil unit. In general, low frequencies propagate farther, and high frequencies propagate short distances. In order to detect a signal generated in the first, second, or third coil parts 41, 42, and 43 in the underground transmission and distribution line safety inspection device, both ends of the first, second, or third coil parts 41, 42, and 43 A connected signal detection comparator 51 is disposed, and a signal injection and detection controller 52 that constantly determines the safety of a long-term underground transmission and distribution line based on a signal to the signal detection comparator 51 is characterized. The signal injection and detection controller 52 communicates with the main controller 49 wirelessly. The main control unit analyzes whether an abnormality occurs at a specific point of the underground transmission and distribution line based on the signals detected by the signal supply and detection units 45, 46, and 47 of the first, second, and third coil units. The biggest technical feature is that it performs the function of a central server that can perform the functions of a central server and transmits this information to the manager's personal terminal or smart phone when an abnormality in the underground transmission and distribution line is detected. to be

6 shows a detailed configuration diagram of the proposed coil unit. FIG. 6(a) is a spread of the proposed coil unit, and FIG. 6(b) is a coil unit formed by connecting the first connection part and the second connection part of the proposed coil unit. The first, second, and third coil units 41, 42, and 43 are essential to facilitate placement on a transmission and distribution line. To this end, it is essential to easily install the coil unit, and it is characterized by having a coil band unit 56 with an insulated coil, a first connection unit 54, and a second connection unit 55. A connection pin 44 is disposed at the second connection part 55, and the connection pin 44 forms a coil through being connected to the first connection part 54.

The coil part as shown in FIG. 6(b) can be formed in the second connection part 55 by connecting the connection pin 44 to the first connection part 54, and the first and second connection parts 54, By connecting the signal injection and detection controller 52 through the signal supply and detection connection part 57 on one side of 55), the coil is very easily connected to the specific phase of the underground transmission and distribution line. It is characterized in that it can be placed in.

Therefore, the present invention is a safety inspection device for an underground transmission and distribution line, comprising: a transmission and distribution line composed of three phases: R phase, S phase, and T phase; First, second, and third transpositions 31, 32, and 33 that change the position of each phase to prevent imbalance of line constants by replacing the R, S, and T phases; a first lightning arrestor (36) for discharging an abnormal voltage to the ground when an abnormal voltage is generated in the first circuit 31; a second arrester (37) for discharging an abnormal voltage to the ground when an abnormal voltage is generated in the second circuit 32; a third lightning arrester (38) for discharging an abnormal voltage to the ground when an abnormal voltage is generated in the third circuit 33; a first coil unit 41 for supplying and detecting a signal to the first coil 31 of a specific phase among the R, S, and T phases; a second coil unit 42 for supplying and detecting a signal to the second coil 32 of a specific phase among the R, S, and T phases; a third coil unit 43 for supplying and detecting a signal to the third coil 33 of a specific phase among the R, S, and T phases; a signal supply and detection unit 45 of the first coil unit 41 supplying and detecting a signal of the first coil unit 41; a signal supply and detection unit 46 of the second coil unit 42 supplying and detecting a signal of the second coil unit 42; a signal supply and detection unit 47 of the third coil unit 43 for supplying and detecting signals of the third coil unit 43; a main controller 49 that remotely detects information obtained from the signal supply and detection units 45, 46, and 47 of the first, second, and third coil units; The main control unit 49 intends to propose a safety inspection device for an underground transmission and distribution line characterized in that the safety of the underground transmission and distribution line is inspected based on the detection state of the signal.

In addition, the present invention is a method for inspecting the safety of an underground transmission and distribution line, consisting of three phases of R, S, and T, and first, second, and third for preventing unbalance of line constants in the R, S, and T phases. A first step of supplying a signal to the first coil unit 41 of the first coil unit 31 of a specific phase among the R, S, and T phases in the coils 31, 32, and 33 ; a second step of detecting a signal detected by the second coil unit 42 of the second coil unit 32; a third step of detecting a signal detected by the third coil unit 43 of the third coil unit 33; a fourth step of supplying a signal to the second coil unit 42 of the second coil unit 32; a fifth step of detecting a signal detected by the first coil unit 41 of the first coil unit 31; A sixth step of detecting a signal detected by the third coil unit 43 of the third coil unit 33; A seventh step of supplying a signal to the third coil unit 43 of the third coil unit 33; An eighth step of detecting a signal detected by the second coil unit 42 of the second coil unit 32; A ninth step of detecting a signal detected by the third coil unit 43 of the third coil unit 33, wherein the first, second or third coil unit 41, 42, 43 detects a specific signal. When a signal is supplied to the coil unit, a safety inspection method for an underground transmission and distribution line characterized by detecting an abnormal point in the underground transmission and distribution line by detecting a signal sequentially generated from a coil unit located near the specific coil unit. suggests

The above description is only an illustrative example of the technical idea of the present invention, and the present invention can be applied to a safety inspection device for underground transmission and distribution lines and an inspection method using the same by various modifications to those skilled in the art, However, it should be recognized that the scope of technology that can be easily modified technically also belongs to the scope of this patent.

10: conduit type underground transmission and distribution line
11: Ground
12: underground transmission and distribution lines
13 : Sand
14: conduit case
15: cover part
20: power old underground transmission and distribution line
21: power outlet case
22-1: 1st cradle
22-2: 2nd cradle
23: transmission and distribution line
24: distribution line
25: communication line
26: walking passage
30: Underground transmission and distribution line with the proposed safety inspection device applied
31 : 1st love song
32: 2nd Love Song
33: 3rd Love Song
36: first arrester
37: second arrester
38: 3rd arrester
40: Proposed underground transmission and distribution line signal injection and detection system
41: first coil part
42: second coil unit
43: third coil unit
44: connection pin
45: first coil unit signal supply and detection unit
46: second coil unit signal supply and detection unit
47: signal supply and detection unit of the third coil unit
49: main control unit
51: signal detection comparator
52: signal injection and detection controller
53: personal terminal or smart phone
54: first connection part
55: second connection part
56: coil band part
57: signal supply and detection connection
R: R phase
S: S phase
T: Phase T
S1: first switch
S2: second switch
S3: 3rd switch
S4: 4th switch
Vin: internal power

Claims (9)

In the safety inspection device for underground transmission and distribution lines,
A transmission and distribution line consisting of R phase, S phase and T phase;
First, second, and third transpositions 31, 32, and 33 that change the position of each phase to prevent imbalance of line constants by replacing the R, S, and T phases;
a first lightning arrestor (36) for discharging an abnormal voltage to the ground when an abnormal voltage is generated in the first circuit 31;
a second arrester (37) for discharging an abnormal voltage to the ground when an abnormal voltage is generated in the second circuit 32;
a third lightning arrester (38) for discharging an abnormal voltage to the ground when an abnormal voltage is generated in the third circuit 33;
a first coil unit 41 for supplying and detecting a signal to the first coil 31 of a specific phase among the R, S, and T phases;
a second coil unit 42 for supplying and detecting a signal to the second coil 32 of a specific phase among the R, S, and T phases;
a third coil unit 43 for supplying and detecting a signal to the third coil 33 of a specific phase among the R, S, and T phases;
a signal supply and detection unit 45 of the first coil unit 41 supplying and detecting a signal of the first coil unit 41;
a signal supply and detection unit 46 of the second coil unit 42 supplying and detecting a signal of the second coil unit 42;
a signal supply and detection unit 47 of the third coil unit 43 for supplying and detecting signals of the third coil unit 43;
a main controller 49 that remotely detects information obtained from the signal supply and detection units 45, 46, and 47 of the first, second, and third coil units;
The main controller 49 checks the safety of the underground transmission and distribution line based on the detection state of the signal.
According to claim 1,
First to fourth switches (S1 to S4) for supplying signals of variable frequency to the first, second or third coil units (41, 42, 43) in the underground transmission and distribution line safety inspection device;
When the first switch S1 and the second switch S2 of the first to fourth switches S1 to S4 are turned on, the third switch S3 and the fourth switch S4 are It turns off (Turn-off);
When the third switch S3 and the fourth switch S4 are turned on, the first switch S1 and the second switch S2 are turned off. safety inspection device for underground transmission and distribution lines
According to claim 2,
Safety inspection device for underground transmission and distribution lines, characterized by a signal injection and detection controller 52 for controlling variable frequencies of tens of Hz to hundreds of kHz to the first to fourth switches S1 to S4
According to claim 1,
In order to detect a signal generated in the first, second, or third coil parts 41, 42, and 43 in the underground transmission and distribution line safety inspection device, both ends of the first, second, or third coil parts 41, 42, and 43 Safety inspection device for underground transmission and distribution lines characterized by a connected signal detection comparator (51)
The method of claim 4,
Signal injection and detection that constantly determines the safety of a long-term underground transmission and distribution line based on the signal to the signal detection comparator 51 that detects signals generated in the first, second, or third coil units 41, 42, and 43 Safety inspection device for underground transmission and distribution lines characterized by controller 52
According to claim 3 or 5,
The information of the signal injection and detection controller 52 communicates with the main control unit 49 wirelessly.
The method of claim 6,
The main controller 49 inspects the safety of the underground transmission and distribution line in real time and transmits it to a personal terminal or smart phone;
Safety inspection device for underground transmission and distribution lines, characterized in that the abnormality of the underground transmission and distribution lines is confirmed and an alarm is transmitted to the personal terminal or smart phone
In the safety inspection method of underground transmission and distribution lines,
It is composed of three phases of R, S, and T, and the R, S, and R phases in the first, second, and third circuits (31, 32, and 33) for preventing unbalance of line constants in the R, S, and T phases. A first step of supplying a signal to the first coil unit 41 of the first coil unit 31 of a specific phase among the phase and the T phase;
a second step of detecting a signal detected by the second coil unit 42 of the second coil unit 32;
a third step of detecting a signal detected by the third coil unit 43 of the third coil unit 33;
a fourth step of supplying a signal to the second coil unit 42 of the second coil unit 32;
a fifth step of detecting a signal detected by the first coil unit 41 of the first coil unit 31;
A sixth step of detecting a signal detected by the third coil unit 43 of the third coil unit 33;
A seventh step of supplying a signal to the third coil unit 43 of the third coil unit 33;
An eighth step of detecting a signal detected by the second coil unit 42 of the second coil unit 32;
A safety inspection method for an underground transmission and distribution line characterized by a ninth step of detecting a signal detected by the third coil unit 43 of the third coil unit 33
According to claim 8
When a signal is supplied to a specific coil unit from the first, second, or third coil unit 41, 42, or 43, signals sequentially generated from coil units located near the specific coil unit are detected. Safety inspection method for underground transmission and distribution lines characterized by detecting abnormal points of underground transmission and distribution lines through

Images