KR100790462B1 - Temperature detection system of power cables - Google Patents

Abstract

A temperature detection system of a power cable is provided to prevent a fire caused by overheating and an electric leakage by exactly checking the abnormal state of the power cable through a temperature sensor and an alarm. In a temperature detection system of a power cable, a thermal contact alarm is composed of a sensor communication control unit(11) controlling data communication between a temperature sensor(10) and the alarm; an operating unit(40) setting a temperature range or temperature rise rate that is a reference for generating an alarm by a user and inputting or deleting ID(Identification) addresses of each temperature sensor; a data storing unit(30) storing a set value of a user and the ID addresses of each temperature sensor; a display unit(50) displaying the set value inputted from the operating unit and a temperature value detected by the temperature sensor, on a display part; an alarm unit(70) generating an alarm if the detected temperature is over a set temperature range or the temperature rise rate exceeds the pre-set temperature rise rate; a CPU(20) controlling each unit; and a power supply unit(80) supplying power to the alarm.

Description

Converter temperature detection system {Temperature detection system of power cables}

1 is a block diagram showing the configuration of a converter temperature sensing system according to an embodiment of the present invention.

Figure 2 is a perspective view of the thermal contact alarm of the configuration of the converter temperature sensing system according to an embodiment of the present invention.

Figure 3 is a front view of the thermal contact alarm of the configuration of the converter temperature sensing system according to an embodiment of the present invention.

Figure 4 is an exemplary installation of the sensor on the cable in the converter temperature sensing system according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10: temperature sensor 20: central processing unit

30: data storage unit 40: operation unit

50: display unit 60: remote server

70: alarm unit 80: power supply unit

The present invention relates to a converter temperature detection system, and more particularly, fire and various accidents by generating an alarm when it is determined that the detection result of abnormal temperature overheating of the temperature sensor installed in the heating unit of the converter detects the temperature of the installed point. It relates to a thermal contact alarm that can be prevented.

Electricity is essential to modern life, and this electricity is supplied through converters, the paths through which current flows. But at some point in this converter When an abnormality such as loosening of the screw occurs, the contact resistance of the loosened part of the screw increases, and when the contact resistance increases, heat is generated at that point. The heat generated in this way melts the covering of the wire and causes a short circuit due to insulation breakdown, and the short circuit immediately leads to a fire.

Because of this risk, electrical managers must monitor for any abnormalities, including loosening of the electrical supply system. However, it is not only difficult to monitor the abnormality of all converters at any time with limited personnel, but also there is no guarantee that the abnormalities of the converters will be detected. However, the conventional method of detecting abnormality of the converter has a problem that it is incomplete and inconvenient.

The present invention has been made to solve the above problems of the prior art, a temperature sensor for detecting the temperature of each point installed in the heating unit of the converter and an alarm that generates an alarm when it is determined that the detection result is abnormal overheating It aims to provide a system that can automatically detect the abnormality of converter and prevent accidents such as fire.

Another object of the present invention is to provide a system that can check the heating state of the converter from a remote location through the server connected to the alarm.

The converter temperature sensing system according to the present invention reads at least one or more temperature sensing sensors which sense the temperature at each point installed and installed in the converter and are given a unique address for each sensor, and the temperature sensed by the temperature sensing sensor. It is provided with an alarm to display to the user and to generate an alarm when the detected temperature is out of the temperature range preset by the user or when the rate of temperature rise exceeds the temperature set by the user.

Here, the alarm, the sensor communication control unit for controlling the data transmission and reception between the temperature sensor and the alarm; An operation unit for allowing a user to set a temperature range or a rate of temperature rise as a reference for alarm generation and to input or delete a unique address of each temperature sensing sensor; A data storage unit for storing the user's set value and a unique address of each of the temperature sensors; A display unit which displays on the display means a set value input by the operation unit and a temperature value detected by the temperature sensor; An alarm unit for generating an alarm when the detected temperature is out of a set temperature range or when the temperature rise rate exceeds a set temperature rise rate; A central processing unit which integrates and controls each of the components; And it comprises a power supply for supplying power to the alarm.

The present invention also provides a remote server for displaying the same data as the data displayed on the display unit, a server communication control unit for controlling data transmission and reception between the alarm and the remote server, and data storage for storing data in the data storage unit. It is preferable to further include a battery, and it is preferable that the temperature sensor is installed up to 1000 in parallel per one converter.

In addition, in the present invention, the data transmission and reception between the alarm and the remote server is made by the RS-485 method, the data storage unit is composed of SRAM (Static Random Access Memory), the alarm unit is a lamp or buzzer operated by a relay To generate an alarm and to release the alarm when the detected temperature is within the set temperature range, to maintain the alarm even when the temperature is within the set range, and to generate the alarm even if the temperature is not within the set range. The apparatus may further include a release function, and the power supply unit supplies the DC voltage power by a switching mode power supply (SMPS).

Hereinafter, an embodiment of a converter temperature sensing system according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing the configuration of a converter temperature sensing system according to an embodiment of the present invention.

The temperature sensor 10 is installed in a converter which is a target of temperature sensing, senses the temperature of the installed point, and is assigned a unique address for each sensor.

The temperature sensor has a structure that senses and transmits the temperature by the built-in semiconductor temperature sensor and processor. It is small and light size of about 50g and can be directly attached to the heating part such as electric wires or busbars where current flows. It is easy. In addition, since it can operate with weak current, it can operate with voltage generated by diode and capacitor installed in communication line, so it doesn't need separate power supply, and it can be converted into only two cables (2C RS485 Shield Cable). Up to 1000 can be installed per parallel. And since communication is performed at low voltage level of 5V, it can transmit the sensed temperature up to 300meter through the converter. The data communication speed is suitable for 115200bps and can measure the temperature in the range of -55 ~ 125 ℃.

An alarm is a device that generates an alarm by accepting and displaying the temperature of the converter from the temperature sensor and determining that it is abnormally overheated if the temperature is out of the preset temperature range by the user or if the temperature rises rapidly within a certain time. The server can manage temperature data interchangeably with MODBUS communication protocol of RS485 communication. 1000 temperature sensors can be connected to each alarm and the alarm weighs approximately 800g with a flat panel mounting method.

In FIG. 1, the alarm unit includes a sensor communication control unit 11, a central processing unit 20, a data storage unit 30, a battery 31, an operation unit 40, a display unit 50, a remote server 60, and a server communication control unit ( 61, the alarm unit 70, and the power supply unit 80.

Looking at the operation of the converter temperature sensing system of the present invention, first, the user inputs the upper limit value and the lower limit value or the rate of increase of the temperature as the reference value that can be determined as abnormal overheating through the operation unit 40. The input is made by the user pressing a button provided in the alarm, and the input data is simultaneously displayed on the display unit 50 for the user to check. The setting value input by the user is stored in the data storage unit 30 by the central processing unit. In addition to the set value, the data storage stores a unique address of each temperature sensor, and thus stores the set value input by the user for each temperature sensor. This data storage unit is composed of SRAM and is operated by a data storage battery.

The sensor communication control part 11 receives the temperature of the heat generating part of the converter transmitted by the temperature sensor through a sensor communication circuit, and transmits it to an alarm. The transmitted temperature value is displayed on the display unit, and the central processing unit 20 checks the address of the temperature sensor which transmitted the data, and then reads the data set in the corresponding temperature sensor in the data storage unit and compares it with the received temperature value. At this time, if it is determined that the received temperature value is outside the set value and abnormally overheated, the central processing unit issues an alarm command to the alarm unit 70.

The alarm unit generates an alarm by a lamp or a buzzer according to the command of the central processing unit. In the present embodiment, such alarm means is operated by a buzzer or a relay for alarm contact output.

The temperature set value of the user and the temperature data of the converter measured by the temperature sensor may be sent to the server 60 remotely by the server communication control unit and displayed on the screen by an interface installed in the server. In this embodiment, the alarm and the remote server transmits and receives data by RS-485, but various communication methods such as RS-232, CDMA, TCP / IP, UDP, FTP, and the like may be used.

In addition, the voltage required to operate the alarm is supplied by the power supply unit 80 and the power supply unit is a SMPS (Switching Mode Power Supply), the control power supply AC100 ~ 240V, 50 / 60Hz AC voltage is converted to DC 110V and supplied.

2 is a perspective view of the alarm in the configuration of the converter temperature sensing system according to an embodiment of the present invention and Figure 3 is a front view.

As shown in Fig. 2 and 3, the alarm is an operation button [Auto / Manual] button to select the automatic / manual return function, [Alarm Release] button used to manually return when an alarm occurs, ON / OFF the buzzer sound [Buzzer ON / OFF] button, [Check] button used to check the connection status of temperature sensor and alarm, [Set] button used to enter setting mode, [▶ used to move setting position ] Button, [▲] button used to increase the number of set digits, and [Save] button used to save the function.

In the present invention, the alarm is automatically canceled by using the [AUTO / MANUAL] button. Auto lamp blinks when auto alarm off function is selected. If you select the automatic alarm clearing function, the alarm is automatically cleared 4 seconds after the alarm is cleared.

And to cancel the alarm manually, select [Manual] by using the [Auto / Manual] button on the control panel. Manual lamp blinks when manual alarm release function is selected. If the manual alarm release function is selected, the alarm will be maintained even if the alarm is released until the user presses the [release alarm] button.

In addition, when the buzzer lamp is turned off using the [Buzzer ON / OFF] button to make a buzzer sound, the buzzer sounds when the buzzer lamp is flickered by using the [Buzzer ON / OFF] button to make the buzzer sound. Will not.

If you want to place the input channel display on the desired channel manually, each time you press the [▲] button, the input channel is increased by one and the temperature value corresponding to the input channel is displayed on the temperature display part. The user places the desired channel using the [▲] button.

If you want to switch the display of the input channel automatically, press the [SAVE] button to switch the input channel display automatically.

To check the connection with the temperature sensor, press the [Check Signal] button and check the alarm indicator lamp. The channel where the lamp is turned on is not connected to the temperature sensor, and the channel where the lamp is turned off is normally connected.

If you want to enter the setting mode, press and hold the [SET] button for 3 seconds to enter the setting mode. There are four setup modes in the setup mode: Curve alert, HIGH alert, LOW alert, and temperature sensor unique address setup.

Curve alarm setting sets the slope start point temperature and the slope end point temperature. That is, it is a setting item that generates an alarm when the temperature measured by the temperature sensor reaches within 1 minute from the start of the slope to the end of the slope. In this case, set the start point of the slope first and set the end point of the slope as the temperature difference between the slope start point and the end point.

Therefore, enter the setting mode first and check that [C.AL] is displayed, and press the [Save] button to enter the slope start point setting mode. Use the [>] and [▲] buttons to set the tilt start point, and press the [Save] button. If Err is displayed, reset because the setting is wrong. Next, use the [▶] and [▲] buttons to set the tilt end point and press the [Save] button to set and save the tilt start point and the end point set by the user.

To set HIGH alarm, enter setting mode and check that [H.AL] is displayed. Press [Save] button to enter channel selection mode. Use the [▲] button to select the channel to set and press the [Save] button. The HIGH alarm value set for the channel to be displayed is displayed. At this time, set the desired temperature value using the [▶] and [▲] buttons. The first digit selects the polarity (video, minus) so use the [▲] button to select it. Press [Save] button to set and save the user set temperature.

To set the LOW alarm, enter the setting mode and press the [SET] button once while [H.AL] is displayed. Check that [L.AL] is displayed and press the [Save] button to enter the channel selection mode. Use the [▲] button to select the channel to set and press the [Save] button. The LOW alarm value set for the channel to be displayed is displayed. At this time, set the desired temperature value by using the [▶] and [▲] buttons. The first digit selects the polarity (video, minus) so use the [▲] button to select it. Press [Save] button to set and save the user set temperature.

If you want to enter a unique address for the new temperature sensor, first connect the new temperature sensor to the correct polarity and then enter the setting mode. Check that [Fnd] is displayed and press the [Save] button. [---] is displayed and a new temperature sensor is found. At this time, if a new temperature sensor is detected, [ooo] is displayed. At this time, press the [Save] button to switch to the channel input setting mode to set a channel for inputting a unique address of the new temperature sensor. Set the channel to input the unique address of the new temperature sensor using the [▲] button, and press the [Save] button to input the unique address of the new temperature sensor to the channel set by the user.

If you want to delete the unique address of the existing temperature sensor, enter the setting mode first. Check that [Fnd] is displayed, press the [Save] button, check that [---] is displayed and press the [Save] button. Use the [▲] button to place the unique address of the temperature sensor on the channel to be deleted and press the [Save] button to delete the unique address of the temperature sensor set by the user.

To cancel the setting mode during the setting, press the [SET] button during the setting to switch to the state before entering the next setting mode. If the setting mode was entering the temperature sensor unique address setting mode before switching, the setting mode is exited.

On the other hand, the present invention is a kind of thermal contact alarm, in which the temperature measurement values for each phase on the R, S, and T phases of the AC power are included in the data, and the data includes a unique code, that is, a map address. In addition, the temperature sensor used in the present invention does not require a separate power source, and is generally attached 1: 1 to a necessary place. In the present invention, one sensor can communicate up to 300 meters on a cable. Therefore, in the thermal contact alarm of the present invention, it is preferable to install one sensor at least every 300 meters of cable length. Up to 1000 sensors can be connected in this way.

In the sensor connection method according to the present invention, a converter may be installed on one side of a cable, and a plurality of detectors may be installed within a range of 300 meters, the maximum communication distance from the converter. 4 is an exemplary view of a wiring method.

Thus, by the implementation of the present invention consisting of a temperature sensor for detecting the temperature of each point installed in the heating unit of the converter and an alarm that generates an alarm if it is determined that the detection result is abnormal overheating, the abnormality of the converter simply and accurately It is possible to check the presence of the converter to prevent fire due to abnormal overheating and short circuit of the converter.

In addition, since the temperature of the converter detected by the temperature sensor can be checked through the server connected to the alarm, it is possible to check the heating state of the converter at a remote location.

Claims (13)

One or more temperature sensing sensors installed at the converter to sense the temperature of each installed point and each sensor has a unique address, and read and display the temperature detected by the temperature sensing sensor to the user. In the converter temperature sensing system comprising a thermal contact alarm for generating an alarm when the temperature is out of a preset temperature range or the rate of increase of the temperature exceeds a preset temperature rise rate by the user. A sensor communication control unit controlling data transmission and reception between the temperature sensor and the alarm; An operation unit for allowing a user to set a temperature range or a rate of temperature rise as a reference for alarm generation and to input or delete a unique address of each temperature sensing sensor; A data storage unit for storing the user's set value and a unique address of each of the temperature sensors; A display unit which displays on the display means a set value input by the operation unit and a temperature value detected by the temperature sensor; An alarm unit for generating an alarm when the detected temperature is out of a set temperature range or when the temperature rise rate exceeds a set temperature rise rate; A central processing unit which integrates and controls each of the components; And A converter temperature sensing system, characterized in that it comprises a power supply for supplying power to the alarm. The converter temperature according to claim 1, further comprising a remote server for displaying data identical to the data displayed on the display unit, and a server communication control unit for controlling data transmission and reception between the alarm and the remote server. Detection system. The system of claim 2, wherein data transmission and reception between the alarm and the remote server is performed by RS-485. 4. The converter temperature sensing system according to any one of claims 1 to 3, wherein the temperature sensing sensor has a structure in which a temperature is sensed and transmitted by a built-in semiconductor temperature sensor and a processor. 4. The converter temperature sensing system according to any one of claims 1 to 3, wherein the temperature sensing sensor operates with a voltage generated by a diode and a capacitor installed in a communication line. 4. The converter temperature sensing system according to any one of claims 1 to 3, wherein up to 1000 temperature sensors are installed in parallel per one converter. 4. The converter temperature sensing system according to any one of claims 1 to 3, wherein said data storage is comprised of static random access memory (SRAM). 4. The converter temperature sensing system according to any one of claims 1 to 3, further comprising a data storage battery for storing data in said data storage. 4. The converter temperature sensing system according to any one of claims 1 to 3, wherein the alarm unit generates an alarm by a lamp or a buzzer operated by a relay. The method of claim 1, wherein the alarm unit is configured to cancel an alarm when the detected temperature is within a set temperature range, and maintain the alarm even when the temperature is within a set range. And further comprising at least one or more of the functions of releasing the alarm even if the temperature is not within the set range. 4. The converter temperature sensing system according to any one of claims 1 to 3, wherein the power supply unit supplies DC voltage power by a switching mode power supply (SMPS). The converter according to any one of claims 1 to 3, wherein the data measured by the temperature sensor includes a temperature measurement value of each phase of the AC power and a map address which is a unique code. Temperature sensing system. The converter according to any one of claims 1 to 3, characterized in that a converter is provided on one side of a cable for connection of the temperature sensor, and a plurality of detectors are installed within the maximum communication distance in the converter. Temperature sensing system.

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