KR20190121542A - Thermal relay system comprising thermal imaging camera - Google Patents

Abstract

The present invention relates to a thermal relay system having a thermal imaging camera. The thermal relay system comprises: a circuit breaker blocking power supplied to a power apparatus; at least one thermal imaging camera photographing a thermal image with regard to the power apparatus; and a relay controlling operation of the circuit breaker based on data received from the thermal imaging camera. The relay includes: a sensor unit measuring current or voltage supplied to the power apparatus; an image module connection unit receiving the thermal image photographed from the at least one thermal imaging camera; and a calculation unit calculating operation heat and temperature information included in the thermal image based on a value measured from the sensor unit and using the calculated operation heat and temperature information to determine whether the circuit breaker is operated.

Description

Thermal relay system comprising thermal imaging camera

The present invention relates to a thermal relay system having a thermal imaging camera.

In general, a power distribution panel, a distribution panel, a distribution panel, etc. are devices that receive high voltage or extra high voltage electricity supplied by a power company, convert them into voltages used by customers, and distribute them to a load facility.

Such switchboards, switchboards, and distribution boards are provided with power relays such as high voltage circuit breakers and current transformers, and protection relays for power system protection and monitoring.

Here, the protection relay is controlled to supply or cut off power to a load end such as a motor, an electric motor. The protection relay can protect the load stage in case of accidental current such as over current and short circuit current.

In other words, the protective relay can determine the fault of the system and cut off the fault section quickly. Recent advances in technology have included protection relays with a variety of additional functions, including temperature monitoring for specific power devices.

1 is a diagram showing a protective relay using a conventional thermometer.

Referring to FIG. 1, the protection relay 10 receives the temperature measured from the thermometer 25 attached to the target device 20.

The protective relay 10 converts the temperature measured by the thermometer 25 into an actual temperature using an analog to digital convert (ADC), and then, if the calculated temperature information is higher than the reference temperature, the user may use any means. Notification information may be provided.

However, the method using the thermometer 25 can only monitor the temperature of the portion where the thermometer 25 is installed, there is a limit that can not properly protect the circuit if the temperature rise occurs in the portion where the thermometer 25 is not installed. . In addition, there is a problem that can not provide visual information about the target device that requires the temperature information.

2 is a view showing a conventional thermal relay.

2, the conventional thermal relay 11 measures the current input to the power equipment 21 through the CT sensor of the power system.

Subsequently, the thermal relay 11 calculates the heat amount based on the measured data, and then compares the calorie value calculated in advance with the allowable heat amount of the power equipment 21 which is set in advance.

If the calculated heat amount is larger than the allowable heat amount, the thermal relay 11 opens the breaker 12 to separate the power equipment 21 from the system.

However, in the case of the thermal relay 11, the allowable heat amount of the power equipment 21 may be lowered by the ambient temperature, but there is a problem that it is difficult to reflect this.

For example, when the ambient temperature is high, the allowable heat amount of the power equipment 21 should be lowered, but this cannot be reflected. When the temperature of the power equipment 21 rises abnormally due to an accident such as a fire, the power equipment 21 ) Was difficult to properly protect.

The present invention provides a thermal relay system that can increase the reliability of relay operation for a power device using temperature information calculated based on a thermal image photographed by at least one thermal imaging camera and an operating heat amount measured by a sensor unit. It aims to do it.

In addition, an object of the present invention is to provide a thermal relay system capable of effectively protecting a power device by reducing the magnitude of the allowable heat amount of the power device as the ambient temperature changes.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention, which are not mentioned above, can be understood by the following description, and more clearly by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

In order to solve such a problem, the thermal relay system of the present invention includes a circuit breaker for shutting off a power source provided to a power device, at least one thermal imaging camera for photographing a thermal image of the power device, and the thermal imaging camera. And a relay for controlling the operation of the circuit breaker based on the received data, wherein the relay includes: a sensor unit measuring a current or voltage provided to the power device, and the heat photographed from the at least one thermal imaging camera. An operation module and a temperature information included in the thermal image are calculated based on an image module connection unit for receiving an image and a value measured by the sensor unit, and the operation of the circuit breaker is performed using the calculated operation calorific value and the temperature information. It includes an operation unit for determining whether or not.

The operation unit may operate the circuit breaker when the calculated amount of operation heat is greater than an allowable amount of heat of the power device or when the temperature information is greater than a predetermined reference temperature.

The operation unit may operate the circuit breaker when the calculated amount of operation heat is greater than an allowable amount of heat of the power device and the temperature information is greater than a predetermined reference temperature.

The operation unit may adjust the magnitude of a pre-stored allowable heat amount for the power device when the temperature information is greater than a predetermined reference temperature, and when the calculated calorific value is greater than the adjusted allowable heat amount, the breaker. Can be operated.

The operation unit may reduce the size of the allowable heat amount when the temperature information included in the thermal image is greater than the reference temperature.

The apparatus may further include a communication unit configured to transmit the thermal image captured by the thermal imager and the value measured by the sensor unit to a web server or a user terminal, and a memory unit configured to store the thermal image and the measured value. .

The communication unit may provide the web server or the user terminal with values measured by the thermal image and the sensor unit in real time, or provide data stored in the memory unit to the web server or the user terminal. .

In addition, when it is determined that an abnormal operation has occurred in the power device based on the calculated amount of operation heat and the temperature information, the operation unit informs the web server or the user terminal of the abnormal operation through the communication unit. Can provide.

The image module connection unit may receive the thermal image from the at least one thermal imaging camera using a wired connection method including a USB, Ethernet, or RS485 standard, or a wireless connection method including WIFI or Bluetooth. Can be.

The thermal relay system of the present invention can increase reliability of relay operation for a power device by using temperature information calculated based on a thermal image photographed by at least one thermal imager and an operation heat amount measured by a sensor unit. .

In addition, the present invention can effectively protect the power device by reducing the amount of allowable heat of the power device as the ambient temperature changes, it is possible to increase the reliability of the relay operation for the power device.

In addition, a plurality of thermal imaging cameras of the present invention may be installed inside a power device that does not receive light, and may determine whether a failure occurs at a specific point of the power device, thereby increasing the reliability of the relay operation for the power device, Stability can be improved.

In addition, the thermal imaging camera of the present invention has an advantage that the size is smaller than that of the surveillance camera normally installed in the switchboard, so that it is easy to install and can be operated at a low cost.

 In addition to the effects described above, the specific effects of the present invention will be described together with the following description of specifics for carrying out the invention.

1 is a diagram showing a protection relay using a conventional thermometer.
2 is a view showing a conventional thermal relay.
3 is a diagram illustrating a thermal relay system according to some exemplary embodiments of the present invention.
4 is a block diagram illustrating a thermal relay system according to an exemplary embodiment of the present invention.
5 is a block diagram illustrating a thermal relay system according to another exemplary embodiment of the present invention.
6 is a view for explaining the operation of the thermal relay system according to an embodiment of the present invention.
7 is a view for explaining the operation of the thermal relay system according to another embodiment of the present invention.
8 is a view for explaining the operation of the thermal relay system according to another embodiment of the present invention.

The above objects, features, and advantages will be described in detail with reference to the accompanying drawings, and thus, those skilled in the art may easily implement the technical idea of the present invention. In describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. In the drawings, the same reference numerals are used to indicate the same or similar components.

Hereinafter, a protection relay according to some embodiments of the present invention will be described with reference to FIGS. 3 to 8.

3 is a diagram illustrating a thermal relay system according to some exemplary embodiments of the present invention.

Referring to FIG. 3, the thermal relay system 100 of the present invention is connected to a power device 200, a user terminal 410, and a web server 420.

The thermal relay system 100 supplies or cuts power to the power device 200.

The thermal relay system 100 may protect the power device 200 when an accident current such as overcurrent or short circuit current occurs in the power device 200. The thermal relay system 100 may determine an accident of the system and quickly block the accident section.

The thermal relay system 100 may include an electronic motor protection relay (EMPR), an air circuit breaker (ACB), a molded case circuit breaker (MCCB), a miniature circuit breaker (MCB), and the like. However, the present invention is not limited thereto.

The power device 200 may include a plurality of devices 210, 220, and 230. In this case, the power device 200 may include a load end such as a motor, an electric motor, etc., and may be connected to a system and operated.

The thermal relay system 100 may determine whether the power device 200 is abnormal by measuring a current or a voltage provided to the power device 200. In addition, the thermal relay system 100 may determine whether the power device 200 is abnormal by analyzing a temperature measured by a temperature sensor (not shown) adjacent to the power device 200 or a thermal image measured by a thermal imaging camera. Can be.

In this case, the thermal relay system 100 may photograph the power device 200 using a plurality of thermal imaging cameras.

At this time, each of the thermal imaging camera to determine the abnormality of the power device 200 by photographing not only the main body of the power device 200, but also a thermal image for the circuit, wire, resistance, system power connected to the power device 200. can do. Detailed description thereof will be described later.

The thermal relay system 100 transmits a measurement value of current or voltage provided to the thermal image or the power device 200 captured by the thermal imaging camera to the user terminal 410 or the web server 420 through the network 300. Can be.

Here, the communication protocol used in the network 300 includes CDMA (Code Division Multiple Access) communication, WCDMA (Wideband Code Division Multiple Access) communication, or broadband wireless communication.

In this case, the wireless communication network may include a wireless LAN (WLAN), Wi-Fi, WiBro, WiMAX, World Interoperability for Microwave Access (Wimax), HSDPA (High Speed Downlink Packet Access), and long term. Long Term Evolution (LTE), IEEE802.16, and Wireless Mobile Broadband Service (WMBS) may be included.

In addition, short-range wireless communication network, Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, Z-Wave, RS- 485 and RJ-45, and the like. However, the present invention is not limited thereto.

The user terminal 410 may be a human machine interface (HMI), a computer, an ultra mobile PC (UMPC), a workstation, a netbook, a personal digital assistant (PDA), a portable computer, a web tablet. ), Wireless phone, mobile phone, smart phone, e-book, e-book, portable multimedia player, portable game console, navigation device, black box The electronic device may be provided as one of various components of an electronic device such as a black box or a digital camera. However, the present invention is not limited thereto.

The web server 420 may include a database or an operating system connected to the network 300 by wire or wirelessly. However, the present invention is not limited thereto.

4 is a block diagram illustrating a thermal relay system according to an exemplary embodiment of the present invention.

Referring to FIG. 4, the thermal relay system 100 according to an embodiment of the present invention includes a relay 110, a thermal imaging camera 120, and a circuit breaker 130.

The relay 110 may control one or more thermal imaging cameras 120.

The relay 110 includes a calculation unit 111, an image module connection unit 113, a memory unit 114, a display unit 115, a communication unit 116, a sensor unit 117, a digital input unit (DI) 118, and a digital unit. It may include an output unit (DO) 119.

In detail, the operation unit 111 may perform an operation required for the control operation of the relay 110. The calculating unit 111 may include any type of conventional processor, microprocessor, or processing logic that interprets and executes instructions.

The image module connection unit 113 may receive a thermal image captured by the thermal imager 120. The image module connection unit 113 may perform data communication with at least one thermal imaging camera 121, 122, 123 connected by wire.

The image module connection unit 113 may receive a thermal image from at least one thermal imaging camera 121, 122, 123 using a wired connection method including a USB, Ethernet, or RS485 standard.

For example, the image module connection unit 113 may include a universal serial bus (USB) protocol, a multimedia card (MMC) protocol, a peripheral component interconnection (PCI) protocol, a PCI-E (PCI-express) protocol, and an advanced technology attachment (ATA). At least one of a variety of interface protocols, such as protocols, Serial-ATA protocols, Parallel-ATA protocols, small computer small interface (SCSI) protocols, enhanced small disk interface (ESDI) protocols, and Integrated Drive Electronics (IDE) protocols. It may be configured to communicate with one thermal imaging camera 120. However, the present invention is not limited thereto.

The calculating unit 111 calculates temperature information for each pixel included in the received thermal image. In this case, the calculating unit 111 determines whether the power device 200 operates normally based on whether the calculated temperature information is smaller than a predetermined reference temperature.

In this case, when an abnormal temperature is found in the received thermal image, the calculator 111 may display the received thermal image on the display 115.

In addition, the calculating unit 111 calculates the amount of operating heat based on the value measured from the sensor unit 117, and determines whether the calculated amount of operating heat is greater than the allowable amount of heat of the power device 200.

Subsequently, the operation unit 111 turns on the circuit breaker 130 when the temperature information for each pixel included in the received thermal image is greater than the preset reference temperature or the calculated operating heat amount is larger than the allowable heat amount of the power device 200. It can be operated.

In addition, the operation unit 111 may operate the circuit breaker 130 when the temperature information included in the received thermal image is larger than the reference temperature and the calculated operating heat amount is larger than the allowable heat amount of the power device 200.

That is, the calculating unit 111 may determine whether the breaker 130 is operated based on the data measured by the sensor unit 117 and the thermal image received from the thermal imaging camera 120.

In addition, the calculator 111 may display the received thermal image on the display 115. The image displayed on the display 115 may be automatically stored in the memory 114. The calculating unit 111 may transmit the received thermal image to the user terminal 410 or the web server 420 through the communication unit 116.

The memory unit 114 may store data including the captured thermal image and the sensed measurement value. For example, the memory unit 114 may measure a voltage or current value measured by the sensor unit 117, a thermal image received from the thermal imaging camera 120, and a user input received through the digital input unit 118. Can be stored.

The memory unit 114 may be a volatile memory unit or a nonvolatile memory unit. The memory unit 114 may be a computer readable medium such as a magnetic or optical disk.

The display 115 may display a thermal image captured by the thermal camera 120 on a panel. In addition, the display unit 115 may simultaneously display the thermal image photographed by the thermal imaging camera 120 and the measured value measured by the sensor unit 117 on the panel.

 The display unit 115 includes a liquid crystal display (LCD), a thin film transistor liquid crystal display (TFT-LCD), an organic light emitting diode (OLED), and a flexible display (flexible). display, a 3D display, and an e-ink display, but the present invention is not limited thereto.

In this case, the display 115 may be disposed in front of the relay 110. However, this is only one example and the present invention is not limited thereto.

The communication unit 116 may exchange data with the user terminal 410 or the web server 420 through the network 300. In detail, the communication unit 116 may transfer the thermal image photographed by the thermal imaging camera 120 and the voltage or current value measured by the sensor unit 117 to an external device through a wired or wireless connection.

In addition, the communication unit 116 may transmit the thermal image photographed by the thermal imaging camera 120 and the voltage or current value measured by the sensor unit 117 to the user terminal 410 or the web server 420 in real time. . The communication unit 116 may transfer data previously stored in the memory unit 114 to the user terminal 410 or the web server 420.

When an event (for example, an operation abnormality) occurs in a part of the power device 200, the communication unit 116 determines whether an event occurs in the user terminal 410 or the web server 420 and a part in which the event occurs. Information can be provided.

The communication protocol used by the communication unit 116 includes, for example, code division multiple access (CDMA) communication, wideband code division multiple access (WCDMA) communication, or broadband wireless communication. In this case, the wireless communication network may include a wireless LAN (WLAN), Wi-Fi, WiBro, WiMAX, World Interoperability for Microwave Access (Wimax), HSDPA (High Speed Downlink Packet Access), and long term. Long Term Evolution (LTE), IEEE802.16, Wireless Mobile Broadband Service (WMBS), and the like.

In addition, short-range wireless communication networks used by the communication unit 116 may include Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, and Z-Wave (Z). Wave, RS-485, and RJ-45 may be included.

The sensor unit 117 may measure a current value or a voltage value provided to the power device 200 connected to the relay 110. The sensor unit 117 may measure a current value or a voltage value for a circuit, a wire, a resistor, and a system power source connected to the power device 200.

In this case, the sensor unit 117 may include a CT sensor for measuring a current value and a PT sensor for measuring a voltage value, but the present invention is not limited thereto, and various sensors may be included.

The digital input unit 118 (DI) may receive an input from a user, or may receive a temperature measured by a temperature sensor (not shown) adjacent to the power device 200 and transmit the received temperature to the operation unit 111. The digital input unit 118 may include a user interface, an external sensor, an external input device, and the like.

When the image storage command is input to the digital input unit 118, the calculation unit 111 may store a thermal image generated from a previous time before the image storage command is input to the memory unit 114. In addition, the calculator 111 may display the stored thermal image on the display 115.

The digital output unit 119 (DO) may include a device for notifying a user that a specific event (eg, an abnormal operation) has occurred. For example, the digital output unit 119 may include a lamp for outputting light or a speaker for outputting sound. However, the present invention is not limited thereto.

When an event occurs in the power device 200, the operation unit 111 may operate the digital output unit 119 to inform the user whether an event has occurred.

The thermal imaging camera 120 may photograph a thermal image of the power device 200.

The thermal imaging camera 120 may include a plurality of thermal imaging cameras 121, 123, and 125, and the plurality of thermal imaging cameras 121, 123, and 125 may photograph different portions of the power device 200. have.

Subsequently, the relay 110 may determine whether the captured thermal image is abnormal.

In detail, the calculation unit 111 included in the relay 110 may analyze temperature information for each pixel included in the captured thermal image, and determine whether the thermal image is normal.

In this case, when an abnormality is found in the received thermal image, the calculator 111 may display the received thermal image on the display 115. In this case, the display 115 may be disposed in front of the relay 110 so that a user may easily check the thermal image. However, the present invention is not limited thereto.

In this case, the image displayed on the display 115 may be automatically stored in the memory 114.

In addition, when an image storage command is input to the digital input unit 118, a thermal image generated from a previous time at which the image storage command is input may be stored in the memory unit 114. In addition, the stored thermal image may be displayed on the display 115.

In addition, when an image storage command is input to the digital input unit 118, the thermal image may be stored in the memory unit 114 before or after a specific time point.

In addition, when the operation calorie calculated based on the data measured by the sensor unit 117 is larger than the allowable calorific value of the power device 200, the thermal image captured by the thermal imaging camera 120 is stored in the memory unit 114. And may be displayed on the display 115.

Subsequently, the captured or stored thermal image may be transferred to the user terminal 410 or the web server 420 through the network 300.

In addition, when an operation abnormality occurs in a part of the power device 200, the thermal relay system 100 may inform the user terminal 410 or the web server 420 of the operation abnormality and information on the part where the operation abnormality occurs. Can provide.

In this case, the thermal image captured by the thermal camera 120 may be delivered to the user terminal 410 or the web server 420 in real time streaming. The thermal image stored in advance in the memory unit 114 may be transferred to the user terminal 410 or the web server 420 by request.

That is, the thermal relay system 100 of the present invention transmits a thermal image of the power device 200 in which an operation abnormality occurs in real-time streaming, saves in real time in a memory, or stores in advance. The user may be provided with a function of loading a thermal image. However, the present invention is not limited thereto.

Subsequently, the relay 110 may operate the circuit breaker 130 when the temperature information included in the received thermal image is larger than the preset reference temperature or the calculated operating heat amount is larger than the allowable heat amount of the power device 200. have.

This is to determine the abnormal operation of the power device 200, by operating the circuit breaker 130, it is possible to prevent the abnormal power input to the power device 200, and to securely protect the power device 200.

5 is a block diagram illustrating a thermal relay system according to another exemplary embodiment of the present invention.

Referring to FIG. 5, the thermal relay system 101 according to another embodiment of the present invention includes a structure substantially the same as that of the thermal relay system 100 described with reference to FIG. 4. Hereinafter, a description of the same structure as the thermal relay system 100 will be omitted, and the description will be mainly focused on differences.

In the protection relay 101 according to another embodiment of the present invention, the image module connection unit 113 may receive a thermal image captured from at least one thermal imager 120.

In this case, the image module connection unit 113 may perform data communication wirelessly with the at least one thermal imaging camera 120.

In detail, the image module connection unit 113 may receive a thermal image from the at least one thermal imager 120 using a wireless connection method including WIFI or Bluetooth.

For example, the image module connection unit 113 may include Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, and Z-Wave. ) May be used to receive a thermal image from the at least one thermal imager 120.

However, the present invention is not limited thereto, and the image module connection unit 113 may be based on protocols such as a wireless Internet communication network interworking with a mobile communication network, a transmission control protocol (TCP) / IP (Internet Protocol), and a user datagram protocol (UDP). Can perform data communication.

6 is a view for explaining the operation of the thermal relay system according to an embodiment of the present invention.

Referring to FIG. 6, in the thermal relay system according to an exemplary embodiment of the present disclosure, the relay 110 calculates an operation heat amount of the power device 200 based on the data measured by the sensor unit 117 (S110). In this case, the relay 110 measures a voltage value or a current value for a power source provided to the power device 200 through the sensor unit 117. Subsequently, the relay 110 calculates the amount of operating heat of the power device 200 based on the measured data.

Subsequently, the relay 110 receives a thermal image including temperature information for each pixel from the thermal imager 120 (S120). In this case, the thermal imaging camera 120 may photograph different portions of the power device 200, and transfer the photographed thermal image to the relay 110 by wire or wirelessly.

Subsequently, the relay 110 determines whether the calculated amount of operating heat for the power device 200 is greater than the allowable heat amount of the power device 200 (S130). For reference, an operation heat amount of the power device 200 may be predetermined in the production stage by the circuit and structure of the device.

Subsequently, the relay 110 determines whether the temperature information is greater than the reference temperature based on the temperature information for each pixel included in the received thermal image (S140). Here, the reference temperature may be a preset value as a temperature at which the power device 200 may operate normally.

Subsequently, the relay 110 operates the breaker 130 when the calculated amount of operating heat is greater than the allowable heat amount of the power device 200 and the temperature information included in the thermal image is greater than the reference temperature (S150). This is to protect the power device 200 in a situation where an abnormality occurs in the power applied to the power device 200 or when the power device 200 cannot operate normally.

On the other hand, the relay 110, when the calculated amount of operating heat is greater than the allowable heat of the power device 200, and the temperature information included in the thermal image is smaller than the reference temperature, the relay 110 is an error of the thermal camera 120 Generate a notification for the inspection (S160).

Here, the notification of the error check of the thermal imaging camera 120 is provided to the user through the display 115 or the digital output unit 119. The notification may be provided to the user in the form of a message or may be provided to the user through various notification means.

By doing so, the user can check whether the thermal imaging camera 120 operates normally. If the thermal imaging camera 120 does not operate normally, the user can restore the thermal imaging camera 120 by repairing the power device 200. It can protect safely and improve the reliability of protection relay.

On the other hand, the relay 110 does not operate the circuit breaker 130 when the calculated operating calorie value is less than the allowable calorific value of the power device 200 or the temperature information included in the thermal image is smaller than the reference temperature.

The relay 110 determines whether the breaker 130 is operated by using a power source and a thermal image provided to the power device 200 in a non-contact manner, thereby preventing the power device 200 from being broken or overloaded. Can be.

That is, the relay 110 determines whether or not the abnormality is based on the first determination condition for determining whether or not the power supplied to the power device 200 is abnormal and the thermal image received from the thermal imaging camera 120. Based on the condition, it is determined whether to operate the breaker 130. In one embodiment of the present invention, the relay 110 operates the circuit breaker 130 when both the first and second determination conditions are satisfied.

Therefore, in one embodiment of the present invention, the protection relay can safely protect the power device 200 and improve the reliability of the protection relay by using a plurality of determination conditions for determining whether there is an abnormality.

7 is a view for explaining the operation of the thermal relay system according to another embodiment of the present invention. Hereinafter, descriptions will be omitted based on differences from the protection relay according to the exemplary embodiment of the present invention.

Referring to FIG. 7, in the thermal relay system according to another exemplary embodiment of the present disclosure, the relay 110 calculates an operation heat amount of the power device 200 based on data measured by the sensor unit 117 (S210). .

Subsequently, the relay 110 receives a thermal image including temperature information for each pixel from the thermal imager 120 (S220).

Subsequently, the relay 110 satisfies a first determination condition for determining whether the calculated operating calorific value for the power device 200 is greater than the allowable calorific value of the power device 200, or the temperature information of the power device 200 is determined. It is determined whether the second determination condition for determining whether the temperature is greater than the reference temperature is satisfied (S230).

If one of the first and second determination conditions is satisfied, the relay 110 operates the breaker 130 (S250).

On the other hand, when neither of the first determination condition and the second determination condition is satisfied, the relay 110 does not operate the circuit breaker 130.

The protection relay according to another embodiment of the present invention operates the circuit breaker 130 with a criterion for mitigating than the protection relay described with reference to FIG. 6.

Through this, the protection relay according to another embodiment of the present invention can operate with more emphasis on the protection of the power device 200, it is possible to more securely protect the power device 200.

8 is a view for explaining the operation of the thermal relay system according to another embodiment of the present invention. In the following description will be omitted based on differences from the protection relay according to another embodiment of the present invention will be omitted.

Referring to FIG. 8, in the thermal relay system according to another exemplary embodiment of the present disclosure, the relay 110 calculates an operation heat amount of the power device 200 based on data measured by the sensor unit 117 (S310). .

Subsequently, the relay 110 receives a thermal image including temperature information for each pixel from the thermal imager 120 (S320).

Subsequently, the relay 110 determines whether the temperature information of the power device 200 is greater than the reference temperature (S330).

Subsequently, when the temperature information of the power device 200 is greater than the reference temperature, the relay 110 adjusts the allowable heat amount of the power device 200 (S335). For example, when the temperature information is greater than the reference temperature, it means that the ambient temperature is high, so that the allowable heat amount of the power device 200 must be lowered to properly protect the power device 200. Therefore, the power device 200 adjusts the allowable heat amount of the power device 200 low.

Subsequently, the relay 110 determines whether the calculated amount of operating heat for the power device 200 is greater than the adjusted allowable heat amount of the power device 200 (S340).

Subsequently, the relay 110 operates the breaker 130 when the calculated amount of operating heat is greater than the adjusted allowable heat amount (S350).

On the other hand, when the calculated operating heat amount is smaller than the adjusted allowable heat amount or the temperature information included in the thermal image is smaller than the reference temperature, the relay 110 does not operate the circuit breaker 130.

In this way, the relay 110 operates the circuit breaker 130 using the power and thermal image provided to the power device 200 in a non-contact manner, thereby preventing the power device 200 from being broken or overloaded. Can be.

In addition, by adjusting the allowable heat amount of the power device 200 in accordance with the ambient temperature, it is possible to more securely protect the power device 200, and improve the reliability of the protective relay.

For reference, although not clearly shown in the drawings, the thermal relay system according to the present invention determines whether an abnormality of the power device 200 using the overcurrent relay (Over Current Relay, OCR) and received from the thermal imaging camera 120 Based on the determination of whether the power device 200 is abnormal using the thermal image, it may be determined whether the breaker 130 is operated. However, this is only one example, and the present invention is not limited thereto.

The present invention as described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by.

100: protective relay 110: controller
111: arithmetic unit 113: image module connection unit
114: memory unit 115: display unit
116: communication unit 117: sensor unit
118: input unit 119: output unit
120: thermal imaging camera 130: breaker
200: power device 300: network
410: user terminal 420: web server

Claims (10)

In a thermal relay system connected to a power device,
A circuit breaker to cut off power provided to the power device;
At least one thermal imaging camera for imaging a thermal image of the power device; And
It includes a relay for controlling the operation of the circuit breaker based on the data received from the thermal imaging camera,
The relay,
A sensor unit measuring current or voltage provided to the power device;
An image module connection unit configured to receive the thermal image photographed from the at least one thermal imager;
A calculation unit configured to calculate an operation heat amount and temperature information included in the thermal image based on the value measured by the sensor unit, and determine whether to operate the circuit breaker using the calculated operation heat amount and the temperature information.
Thermal relay system.
According to claim 1,
The operation unit is configured to operate the circuit breaker when the calculated operating heat amount is greater than an allowable heat amount of the power device or the temperature information is greater than a predetermined reference temperature.
Thermal relay system.
According to claim 1,
The operation unit is configured to operate the circuit breaker when the calculated amount of operating heat is greater than an allowable amount of heat of the power device and the temperature information is greater than a predetermined reference temperature.
Thermal relay system.
According to claim 1,
The operation unit may provide an error checking notification for the thermal imaging camera when the calculated operating heat amount is greater than an allowable heat amount of the power device and the temperature information is smaller than a predetermined reference temperature.
Thermal relay system.
According to claim 1,
The calculation unit,
If the temperature information is greater than a predetermined reference temperature, adjust the magnitude of the pre-stored allowable heat amount for the power device
Operating the circuit breaker when the calculated calorific value is greater than the adjusted allowable calorific value.
Thermal relay system.
The method of claim 5,
The calculating unit may reduce the magnitude of the allowable heat amount when the temperature information included in the thermal image is greater than the reference temperature.
Thermal relay system.
According to claim 1,
The relay,
A communication unit for transmitting the thermal image photographed by the thermal imager and the value measured by the sensor unit to a web server or a user terminal;
Further comprising a memory for storing the thermal image and the measured value
Thermal relay system.
The method of claim 7, wherein
The communication unit,
The thermal image and the values measured by the sensor unit are provided to the web server or the user terminal in real time;
Providing the data stored in the memory unit to the web server or the user terminal
Thermal relay system.
The method of claim 7, wherein
If it is determined that the abnormal operation has occurred in the power device based on the calculated amount of operation heat and the temperature information, the operation unit provides information about the abnormal operation to the web server or the user terminal through the communication unit.
Thermal relay system.
According to claim 1,
The image module connection unit may receive the thermal image from the at least one thermal imaging camera by using a wired connection method including a USB, Ethernet, or RS485 standard, or a wireless connection method including WIFI or Bluetooth.
Thermal relay system.

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