KR20220010199A - IoT-based underground cable connection monitoring and self-diagnosis system - Google Patents

Abstract

The present invention relates to an apparatus for monitoring and self-diagnosing a high-voltage cable connection material based on IoT to perform failure diagnosis of high-voltage cables even from a remote location. According to the present invention, the apparatus comprises: a composite CT (100) installed on a high-voltage cable (1) on one side of a connection material (2) to generate power and measure current; a deterioration sensor (200) installed on the high-voltage cable (1) on the other side of the connection material (2) to detect the temperature of the high-voltage cable; a controller unit (300) including one or more ultrasonic sensors (310) detecting vibration of a predetermined frequency generated in the high-voltage cable (1) connection material (2) to provide a partial discharge (PD), an internal temperature sensor (320) sensing the temperature of the connection material (2), a live wire sensor (330) sensing the voltage of the high-voltage cable (1), and a wireless communication module (340), building big data including the current and temperature of the high-voltage cable, the partial discharge (PD) and temperature of the connection material, and the live voltage of the high-voltage cable, having a reference value set for self-diagnosis, and receiving the big data from the controller unit (300) and self-diagnosing the high-voltage cable connection material in comparison with the preset reference value to display a self-diagnosis state or transmit the self-diagnosis state to a remote location; and a terminal (400) including having a wireless communication module (410) to display the self-diagnosis state transmitted from the controller (300).

Description

IoT-based high-voltage cable connection monitoring and self-diagnosis system {IoT-based underground cable connection monitoring and self-diagnosis system}

The present invention relates to an IoT-based high-voltage cable connection material monitoring and self-diagnosis device, and more particularly, in partial discharge (PD), voltage live wire, and high-voltage cable using vibration of a specific frequency generated in high-voltage cable and high-voltage cable connection material. It relates to an IoT-based high-voltage cable connector monitoring and self-diagnosis device that can predict and analyze the failure diagnosis of high-voltage cable connectors by building big data including detected temperature and current and comparing them with reference values set online at a remote location.

BACKGROUND ART A transmission and distribution power system (electric power system) is a facility for transmitting electricity produced in a power plant to a large-scale use area such as a city. In such power equipment, mechanical and electrical stress may occur in the process of transmitting high-voltage power, and local partial discharge may occur due to the weakening of cable insulation due to the influence of natural environment such as rain or snow or temperature, etc. can Partial discharge may not have a significant effect on the performance or operation of power equipment in the beginning, but if continuous partial discharge occurs, dielectric breakdown (water tree, electric tree) or oxides caused by the effects of electric fields and ions, etc. This leads to deterioration of the insulation. Such insulation deterioration may stop the function of power equipment, and in extreme cases, it may lead to a fire or explosion, resulting in problems such as a shutdown. This can lead to catastrophic failure of electricity supply to the entire city or industrial area.

Partial discharge mainly occurs on the surface of the high-voltage cable or at the connection part of the high-voltage cable, and various methods for measuring the partial discharge are being studied. For example, when partial discharge occurs, various physical phenomena such as light, electromagnetic waves, leakage current, heat, sound, or vibration occur, and the partial discharge is measured using these physical phenomena.

In the case of using light, a camera is installed on one side of the high-voltage cable and a specific color light is detected. However, it is expensive to install a camera, and multiple cameras are installed to monitor the entire circular cable. There is a problem that must be done.

In the case of using electromagnetic waves, it is a method of using a UHF sensor that detects a signal in an ultra high frequency (UHF) band of 500 MHz to 1500 MHz. The prior art discloses a partial discharge detection method using a UHF sensor. In this method using the UHF sensor, it is possible to measure whether partial discharge has occurred to some extent, but since a difference occurs in the measured value depending on the sensor installation conditions, There is a problem in that it is difficult to quantitatively measure the progress of the partial discharge.

In the case of using a high-frequency leakage current, a high-frequency current sensor (HFCT) is attached to the grounding line of a power facility to measure the discharge current flowing along the grounding line when partial discharge occurs. Another prior art suggests a method of using a high-frequency leakage current. This method is a technology applied to overhead lines and measures the leakage current along the grounding line, so it is possible to measure partial discharges occurring in high-voltage lines located at a certain height above the ground. The disadvantage is that it is difficult to

In the method of measuring the heat generated by partial discharge, the temperature of the high-voltage cable does not rise as a whole, but heat is generated partially or locally. There are problems that are susceptible to influence. On the other hand, the method using sound or vibration is difficult to use because the environment of the high-voltage cable in which the partial discharge measuring device is installed is varied, and it is difficult to measure reliably by reflecting the environment according to the installation location. In addition, the partial discharge monitoring of the high-voltage cable according to the prior art as described above has a problem in that the administrator has to check the high-voltage cable directly from time to time.

Patent No. 10-1982623 (2019. 06. 28. Announcement) Patent No. 10-1241965 (2013. 03. 11. Announcement) Patent No. 10-0999575 (2010. 12. 08. Announcement) Patent No. 20-0278981 (2002. 06. 20. Announcement)

The present invention is to solve the problems of the prior art as described above, and an object of the present invention is to provide an IoT-based high-voltage cable connection material monitoring and self-diagnosis device capable of predictive analysis of high-voltage cable failure diagnosis even from a remote location.

The purpose as described above, is installed on the high-voltage cable on one side of the connection material to generate power and measure the current CT; a deterioration sensor installed on the high-voltage cable on the other side of the connection member to sense the temperature of the high-voltage cable; To obtain partial discharge (PD), one or more ultrasonic sensors for detecting vibration of a specific frequency generated from the high-voltage cable connector, an internal temperature sensor for detecting the temperature of the connector, a live sensor for detecting the voltage of the high-voltage cable, and a wireless communication module A big comprising a reference value for self-diagnosis is set in advance and includes the current of the high-voltage cable, the temperature of the high-voltage cable, the partial discharge (PD) of the connection material, the temperature of the connection material, and the live voltage of the high-voltage cable a controller unit for self-diagnosing the high-voltage cable connection material by constructing data and comparing it with a preset reference value, and for displaying or transmitting the data to a remote location; and a terminal having a wireless communication module and displaying the self-diagnosis status transmitted from the controller unit, and is achieved by an IoT-based high-voltage cable connection material monitoring and self-diagnosis device.

According to one aspect of the present invention, the composite CT is provided in a removable case that has a waterproof function and can be opened and closed, and a coupling hole for coupling with the high-voltage cable is formed in the center of the case.

According to another aspect of the present invention, the measurement range of the composite CT is 20 to 600A, the measurement range of the deterioration sensor and the internal temperature sensor is -20°C to 130°C, and the measurement range of the live sensor is 84 KV Above, the measurement range of the ultrasonic sensor is characterized in that 0 to 30 KV to 300 pC.

According to another aspect of the present invention, a temperature-sensitive color-changing tape that is attached while wrapping the connecting material and irreversibly discolors when it exceeds 50 to 70°C is further provided.

According to another aspect of the present invention, the controller unit, a gain control unit for controlling the gain of the measurement value of the ultrasonic sensor; a voltage life or death detection unit that compares the voltage of the live wire sensor with a reference set value to determine whether the voltage is alive or dead; A reference value for self-diagnosis is set in advance, and big data including the current of the high-voltage cable, the temperature of the high-voltage cable, the partial discharge (PD) of the connection material, the temperature of the connection material, and the live voltage of the high-voltage cable is constructed. MCU for self-diagnosing the high-voltage cable connection material in comparison with a preset reference value and displaying it or transmitting it to a remote location; and a display for displaying the self-diagnosis state of the MCU.

According to another aspect of the present invention, the controller unit is characterized in that it further comprises a touch button that is an input means for controlling the controller unit.

According to another aspect of the present invention, the ultrasonic sensor is characterized in that it is installed at both ends or one end of the high-voltage cable connecting material.

According to another aspect of the present invention, the wireless communication module, Bluetooth (Bluetooth), NFC (Near Field Communication), ZigBee (ZigBee), MST (Magnetic Secure Transmission), beacon (Beacon), Ethernet (Ethernet), LoRa (RoLa) and Wi-Fi (WiFi) characterized in that it is composed of one of the wireless communication module.

According to another aspect of the present invention, the live wire sensor is characterized in that it is a non-connected sensor.

According to another aspect of the present invention, the controller unit includes a lower case having a mounting groove therein capable of mounting the ultrasonic sensor and the live wire sensor and having an open top; a PCB provided with the electrical components of the controller; an upper case coupled to an upper portion of the lower case; and a fixing band for binding the lower case and the upper case to the connecting member.

According to another aspect of the present invention, a connector having a waterproof function that is electrically connected to the PCB and electrically connected to the composite CT, the antenna, and the deterioration sensor is provided on the sidewall of the lower case. .

According to another aspect of the present invention, it is characterized in that the display and the touch button is attached to the upper case to be exposed to the outside.

According to another aspect of the present invention, the junction of the lower case and the upper case is characterized in that the waterproof packing is inserted.

According to another aspect of the present invention, the upper case is characterized in that made of a transparent material.

According to the present invention, big data including temperature and current detected in partial discharge (PD), live voltage, and high-voltage cable is constructed using vibration of a specific frequency generated from a high-voltage cable and a high-voltage cable connection material, and a preset reference value is established. By predicting and analyzing the failure diagnosis of the high-voltage cable connector in comparison with the

1 is a block diagram of an IoT-based high-voltage cable connection material monitoring and self-diagnosis apparatus according to an embodiment of the present invention.
FIG. 2 is a detailed configuration diagram of the controller unit of FIG. 1 .
3 is a perspective view illustrating a state in which the IoT-based high-voltage cable connection material monitoring and self-diagnosis device is installed on a high-voltage cable according to an embodiment of the present invention.
FIG. 4 is an enlarged perspective view showing a main part of FIG. 3 .
5 is an exploded perspective view showing a state in which the IoT-based high-voltage cable connection material monitoring and self-diagnosis device is installed on a high-voltage cable according to an embodiment of the present invention.
6 is an enlarged exploded perspective view showing a main part of FIG. 5 .
7 is a side view illustrating a state in which the IoT-based high-voltage cable connection material monitoring and self-diagnosis device is installed on a high-voltage cable according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with the accompanying drawings.

1 is a configuration diagram of an IoT-based high-voltage cable connection material monitoring and self-diagnosis apparatus according to an embodiment of the present invention, and FIG. 2 is a detailed configuration diagram of the controller of FIG. 1 .

1 and 2, the IoT-based high-voltage cable connection material monitoring and self-diagnosis device according to an embodiment of the present invention is installed on the high-voltage cable 1 on the right side of the connection material 2 shown in the drawing, and the high-voltage cable and the connection material Composite CT (100) that generates the power required by the self-diagnostic device located and measures the current, which is one of the information for self-diagnosis of the high-voltage cable and connection material, installed on the high-voltage cable (1) on the left side of the connection material (2) The deterioration detection sensor 200 that detects the temperature of the high-voltage cable, which is one piece of information for self-diagnosis, detects vibration of a specific frequency that occurs in the high-voltage cable (1) connector (2) to obtain partial discharge (PD). Two ultrasonic sensors 310, an internal temperature sensor 320 that detects the temperature of the connection material 2 for contrast with the temperature obtained from the high-voltage cable, and the high-voltage cable 1 for determining whether the high-voltage cable is alive or not A live wire sensor 330 for detecting a voltage, and a wireless communication module 340 for wireless communication with a wireless communication module of a terminal located at a remote location, a reference value serving as a reference for various measurement values for self-diagnosis is set in advance. Pre-set big data including the current of the high-voltage cable that is set and acquired from components such as the above sensor, the temperature of the high-voltage cable, the partial discharge (PD) of the connection material, the temperature of the connection material, and the live voltage of the high-voltage cable A controller unit 300 for self-diagnosing the high-voltage cable connection material in comparison with the reference value and transmitting it to a self-displayed or remote location, and a wireless communication module 410 for wireless communication with a wireless communication module located in the high-voltage cable, the controller unit By being configured with the terminal 400 displaying the self-diagnosis state transmitted from 300, it is possible not only to self-diagnose the high-voltage cable connection material, but also to check the self-diagnosis result of the high-voltage cable connection material from a remote location.

In the above embodiment, the composite CT 100, which is located on the high-voltage cable and performs the functions of generating power and detecting current at the same time, is provided in a removable case with a waterproof function and can be opened and closed, and the high-voltage cable ( By forming a coupling hole for coupling with 1), it is possible to prevent an error due to a short circuit, etc., and to easily perform attachment/detachment work to the high-voltage cable (1).

In the above embodiment, the composite CT 100, which acquires various information for self-diagnosis of the high-voltage cable connection material, has a measurement range of 20 to 600 A, and the deterioration sensor 200 and the internal temperature sensor 320 are -20 It has a measuring range of ℃ ~ 130 ℃, the live sensor 330 has a measuring range of 84 KV or more, the ultrasonic sensor 310 may have a measuring range of 300 pC at 0-30 KV.

Of course, the above various information for self-diagnosis and the reference value to be compared may have different values or be set differently depending on the type of connection material of the high-voltage cable or the surrounding environment.

In the above embodiment, the controller unit 300 compares the voltage of the gain control unit 350 and the live wire sensor 330 to a reference set value to remove noise from the measurement value of the ultrasonic sensor 310 and control the gain to obtain a voltage Voltage life-and-death detection unit 360 for judging life and death, a reference value for self-diagnosis is set in advance, and the current of the high-voltage cable, the temperature of the high-voltage cable, the partial discharge (PD) of the connection material, the temperature of the connection material, the voltage live of the high-voltage cable The self-diagnosis of the MCU 370 along with the measurement values of the MCU 370, which self-displays or transmits to a remote location by self-diagnosing the high-voltage cable connection material in comparison with the preset reference value by building big data including By further providing the display 380 for displaying the result, it is possible to process the measured value for self-diagnosis of the high-voltage cable connector.

In the above embodiment, the controller unit 300 is provided with a touch button 380, which is an input means for controlling the controller unit 300, so that a measurement value such as partial discharge measured by various sensors or the like of a high-voltage cable The self-diagnosis result of the connector can be selectively checked on site.

In the above embodiment, the wireless communication modules 340 and 410 provided in the controller unit 300 and the terminal 400 for wireless communication between the high-voltage cable connection material and the terminal, Bluetooth (Bluetooth), NFC (Near Field) Communication), ZigBee, Magnetic Secure Transmission (MST), Beacon, Ethernet, RoLa, and Wi-Fi, one of wireless communication modules can be selectively used.

In the above embodiment, the live wire sensor 330 may be an unconnected sensor capable of measuring a voltage without directly contacting the high-voltage line in the connection material.

3 is a perspective view showing a state in which the IoT-based high-voltage cable connection material monitoring and self-diagnosis device is installed on a high-voltage cable according to an embodiment of the present invention, FIG. 4 is an enlarged perspective view showing the main part of FIG. 3, and FIG. 5 is An exploded perspective view showing a state in which the IoT-based high-voltage cable connection material monitoring and self-diagnosis device is installed on a high-voltage cable according to an embodiment of the present invention, and FIG. 6 is an enlarged exploded perspective view showing the main part of FIG. It is a side view showing a state in which the IoT-based high-voltage cable connection material monitoring and self-diagnosis device is installed on a high-voltage cable according to an embodiment of the present invention.

According to FIGS. 3 to 7, the controller unit 300 having a pair of lower case 510 and upper case 530 that is vertically separated and coupled to the connecting material of the high-voltage cable is a rectangular container with an open top. As a lower part provided with mounting grooves 511 and 512, which is a space in which the ultrasonic sensor 310 for detecting vibration of the connecting material and the live sensor 330 for measuring the voltage of the connecting material can be fixedly mounted so as to be close to the connecting material. Various electrical components constituting the case 510 and the controller unit 300 are disposed, and are electrically connected to various sensors and the like and are coupled to the upper part of the PCB 520 and the lower case 510 which are inserted into the lower case 510 . By comprising a fixing band 540 for fixing the upper case 530, which is integrally coupled to the upper case 530, and the lower case 510 and the upper case 330 to the connecting material 2, the controller unit 300 is connected to the high-voltage cable It can be attached to and detached from the connecting material.

In the above embodiment, the composite CT 100 has a waterproof function and is provided in a removable case 110 that can be opened and closed, and a coupling hole 120 for coupling with the high-voltage cable 1 in the center of the case 110 . ) is formed, so it is possible to prevent an error due to water leakage and to be easily attached to and detached from the high-voltage cable.

In the above embodiment, by having the temperature-sensitive discoloration tape 130 that is attached while wrapping the connection material 2 and irreversibly discolors when it exceeds 50 to 70° C., the administrator can check the overheating state of the high-voltage cable connection material immediately on the spot .

In the above embodiment, the controller unit 300 has a touch button 380 as an input means for controlling the controller unit 300, and the touch button 390 is an upper case (with the display 380) ( 530) to be exposed to the outside, the administrator can input various information for self-diagnosis in the field and check the self-diagnosis result.

In the above embodiment, the ultrasonic sensor 310 is inserted into the mounting grooves 521 and 512 located at both ends or one end of the high-voltage cable 1 and the connecting material 2 and is installed close to the high-voltage cable, so that the Vibration can be detected more accurately.

In the above embodiment, the composite CT 100 , the antenna 550 , and the deterioration sensor 200 are electrically connected to the PCB 520 , and a waterproof function is provided on the sidewall of the lower case 510 for electrical connection. By installing a plurality of connectors 560 having

In the above embodiment, by inserting a separate waterproof packing into the junction of the lower case 510 and the upper case 530 , it is possible to prevent an error of the controller unit 300 due to water leakage or the like.

In the above embodiment, since the upper case 530 is made of a transparent material, it is not necessary to form a separate space for exposing the display 380 to the outside.

In the above embodiment, the self-diagnosis of the high-voltage cable is performed in the controller unit 300 and the input means for controlling the controller unit 300 is located in the controller unit 300 as an example, but the present invention is limited thereto. By using the terminal 400 as an input means for controlling the controller unit 300, self-diagnosis of the high-voltage cable can be performed at a remote location as well as self-diagnosis. It is possible to remotely control the operation of the controller unit 300 for

Although specific embodiments according to the present invention have been described so far, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the following claims as well as the claims and equivalents.

1: high voltage cable 2: connection material
100: composite CT 110: case
120: bonding hole 130: temperature-sensitive discoloration tape
200: deterioration detection sensor 300: controller unit
310: ultrasonic sensor 320: internal temperature sensor
330: live wire sensor 340: wireless communication module
350: gain control unit 360: voltage life and death detection unit
370: MCU 380: display
390: touch button 400: terminal
410: wireless communication module 510: lower case
520: PCB 530: upper case
540: fixed band 550: antenna
560: connector

Claims (14)

Composite CT (100) installed on the high-voltage cable (1) on one side of the connection material (2) to generate power and measure current;
a deterioration sensor 200 installed on the high-voltage cable 1 on the other side of the connection member 2 to detect the temperature of the high-voltage cable;
In order to obtain partial discharge (PD), one or more ultrasonic sensors 310 for detecting vibration of a specific frequency generated in the connection material 2 of the high-voltage cable 1, and an internal temperature sensor 320 for detecting the temperature of the connection material 2 , a live sensor 330 for detecting the voltage of the high-voltage cable 1, and a wireless communication module 340 are provided, so that a reference value for self-diagnosis is set in advance, the current of the high-voltage cable, the temperature of the high-voltage cable, A controller that self-diagnoses the high-voltage cable connection material against a preset reference value by constructing big data including partial discharge (PD) of the connection material, the temperature of the connection material, and the live voltage of the high-voltage cable, and displays it on its own or transmits it to a remote location part 300; and
A terminal 400 having a wireless communication module 410 and displaying a self-diagnosis state transmitted from the controller unit 300 .
Including, IoT-based high-voltage cable connection monitoring and self-diagnosis device. According to claim 1,
The composite CT 100 has a waterproof function and is provided in a removable case 110 that can be opened and closed, and a coupling hole 120 for coupling with the high-voltage cable 1 in the center of the case 110 is provided. IoT-based high-voltage cable connection material monitoring and self-diagnosis device, characterized in that formed. According to claim 1,
The measurement range of the composite CT 100 is 20 to 600A, the measurement range of the deterioration detection sensor 200 and the internal temperature sensor 320 is -20°C to 130°C, and the measurement of the live wire sensor 330 is The range is 84 KV or more, and the measurement range of the ultrasonic sensor 310 is 0-30 KV to 300 pC, IoT-based high-voltage cable connection material monitoring and self-diagnosis device. According to claim 1,
IoT-based high-voltage cable connection material monitoring and self-diagnosis device, characterized in that it further includes a temperature-sensitive discoloration tape 130 that is attached while wrapping the connection material (2) and irreversibly discolors when it exceeds 50 to 70°C. According to claim 1,
The controller unit 300,
a gain control unit 350 for controlling a gain of the measured value of the ultrasonic sensor 310;
a voltage life or death detection unit 360 that compares the voltage of the live wire sensor 330 with a reference set value to determine whether the voltage is alive or dead;
A reference value for self-diagnosis is set in advance, and big data including the current of the high-voltage cable, the temperature of the high-voltage cable, the partial discharge (PD) of the connection material, the temperature of the connection material, and the live voltage of the high-voltage cable is built. a controller unit 370 for self-diagnosing the high-voltage cable connection material in comparison with a preset reference value and for self-displaying or transmitting to a remote location; and
The display 380 for displaying the self-diagnosis state of the MCU 370
IoT-based high-voltage cable connection material monitoring and self-diagnosis device, characterized in that it further comprises a. According to claim 1,
The controller unit 300, IoT-based high-voltage cable connection material monitoring and self-diagnosis device, characterized in that it further comprises a touch button 380 as an input means for controlling the controller unit 300. According to claim 1,
The ultrasonic sensor 310 is an IoT-based high-voltage cable connection material monitoring and self-diagnosis device, characterized in that it is installed at both ends or one end of the high-voltage cable (1) connection material (2). According to claim 1,
The wireless communication modules 340 and 410 are Bluetooth, Near Field Communication (NFC), ZigBee, Magnetic Secure Transmission (MST), Beacon, Ethernet, RoLa. And Wi-Fi (WiFi) characterized in that it is composed of one of the wireless communication module, IoT-based high-voltage cable connection material monitoring and self-diagnosis device. According to claim 1,
The live wire sensor 330 is an IoT-based high-voltage cable connection material monitoring and self-diagnosis device, characterized in that it is a non-connection type sensor. The method of claim 1,
The controller unit 300,
a lower case 510 having mounting grooves 511 and 512 capable of mounting the ultrasonic sensor 310 and the live wire sensor 330 therein and having an open top;
PCB (520) provided with the electrical components of the controller unit (300);
an upper case 530 coupled to an upper portion of the lower case 510; and
A fixing band 540 for binding the lower case 510 and the upper case 330 to the connecting material 2 .
IoT-based high-voltage cable connection material monitoring and self-diagnosis device, characterized in that it further comprises a. 11. The method of claim 10,
A connector ( 560) is provided, IoT-based high-voltage cable connection material monitoring and self-diagnosis device. 11. The method of claim 10,
IoT-based high-voltage cable connector monitoring and self-diagnosis device, characterized in that it is attached to the upper case 530 so that the display 380 and the touch button 390 are exposed to the outside. 11. The method of claim 10,
An IoT-based high-voltage cable connection material monitoring and self-diagnosis device, characterized in that a waterproof packing is inserted into the junction of the lower case 510 and the upper case 530 . 11. The method of claim 10,
IoT-based high-voltage cable connection material monitoring and self-diagnosis device, characterized in that the upper case 530 is made of a transparent material.

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