KR20090038527A

KR20090038527A - Apparatus for monitering bus bar temperature

Info

Publication number: KR20090038527A
Application number: KR1020070103854A
Authority: KR
Inventors: 정인
Original assignee: (주)그린텍시스템
Priority date: 2007-10-16
Filing date: 2007-10-16
Publication date: 2009-04-21

Abstract

A bus bar temperature monitoring apparatus is provided to grasp state of each bus bar at a glance by indicating the temperature of the bus bar classified especially with color. A bus bar temperature monitoring apparatus comprises: a plurality of temperature sensing modules(130a,130b,130c) installed at one phase bus bar among bus bars; and a temperature sensing unit(200) combined through the temperature sensing module and wireless network. The several bus bars are installed at three phase power supply facility. The temperature sensing module senses the temperature of the one phase bus bar. The temperature sensing unit indicates or monitors temperature information of the bus bar received from a plurality of temperature sensing modules.

Description

Busbar temperature monitoring device {APPARATUS FOR MONITERING BUS BAR TEMPERATURE}

The present invention relates to a busbar temperature monitoring device of a power supply equipment, and in particular, the present invention is to detect the abnormal state of the busbar, that is, the busbar bolt loosening degree by using the busbar temperature sensing module driven by the busbar power supply itself. It relates to a busbar temperature monitoring device.

In each switchgear, in order to supply high voltage and high current to each plant in the plant, each unit and the switchboard are usually connected by busbars. Such busbars are fixed at one end with bolts and nuts on the switchboard and the other ends are fixed at the installation with bolts and nuts. In addition, the busbars are used by connecting several busbars with bolts and nuts. Therefore, in the connection part of the switchboard or each busbar, when the fastening parts of the bolts and nuts are loosened by vibrations, the contact surface decreases and the resistance increases, thereby generating heat due to the joule heat in the contact failure area. In addition, due to this contact area reduction, the current flow through the busbars can be concentrated in part, causing sparks around the bolts and, in serious cases, an explosion hazard.

Therefore, in order to prevent the failure of such busbars, an apparatus for detecting a busbar temperature has been developed. In the prior art busbar temperature monitoring device, a temperature sensor is attached to all of the busbars to display the detected temperature signals through a temperature display monitor. Each temperature sensor and the temperature display monitor are wired. It became. This wired connection method, in particular, makes it difficult to attach and detach the temperature monitoring device in a large factory that requires a lot of busbars, and greatly depends on the type and size of the busbars.

In addition, the bus bar temperature monitor of the prior art has a disadvantage of consuming unnecessary power because a separate external power supply for driving the temperature detection sensor is required.

In addition, the busbar temperature monitor of the prior art only displays the detected busbar temperature values in numerical form, making it difficult for an administrator to grasp the state of all the busbars at a glance.

In order to solve the above problems, the present invention is to provide a bus bar temperature monitoring value that is easy to attach and detach to the bus bar and is not affected by the type and size of the bus bar.

In addition, the present invention is to provide a bus bar temperature monitoring value using the bus bar itself power source without a separate external power source for driving the temperature detection sensor.

In addition, the present invention is to provide a bus bar temperature monitoring value that can grasp the state of each bus bar at a glance by displaying the temperature of all the bus bar in the form of color.

In order to achieve the above object, the present invention is a plurality of temperature sensing module is installed in the first phase busbar of the plurality of busbars installed in the three-phase power supply equipment for detecting the temperature of the first phase busbar, and the And a temperature monitoring unit coupled to a temperature sensing module and a wireless communication network, the temperature monitoring unit displaying and monitoring busbar temperature information received from the plurality of temperature sensing modules, wherein the temperature sensing module controls the temperature of the first phase busbar. A first temperature sensor for sensing, a first wireless transceiver for transmitting and receiving data with the temperature monitoring unit through the wireless communication network, an address input unit for inputting address information allocated to each of the temperature sensing modules from the outside, and the input address An address storage unit for storing information and a bus bar including address information from the temperature monitoring unit When the information request signal is received, the detected busbar temperature information is transmitted to the temperature monitoring unit through the first wireless transceiver when the received address information is compared with the address information of the address storage unit. It provides a busbar temperature monitoring device comprising a first control unit for controlling to.

In addition, the busbar temperature monitoring apparatus of the present invention includes a plurality of busbar temperature monitoring devices installed in a second phase busbar and detecting a temperature of the second phase busbar to transmit the detected busbar temperature information to the first control unit. A plurality of third temperature sensors installed on a second temperature sensor and a third phase busbar among the plurality of busbars to detect the temperature of the third phase busbar and transmit the detected busbar temperature information to the first controller. A sensor is further included, wherein the first control unit transmits the busbar temperature information detected by the first to third temperature sensing sensors to the temperature monitoring unit when a busbar temperature information request signal is received from the temperature monitoring unit. It features.

In addition, the temperature sensing module of the present invention is applied to the voltage of the first phase busbar and the voltage of the second phase or third phase busbar as an AC input signal, and converts the input AC signal into a DC power source to the The apparatus may further include a DC power supply unit for supplying the first control unit, wherein the first control unit provides the DC power supplied from the DC power supply unit as a power signal to the first to third temperature sensors.

In addition, the temperature monitoring unit of the present invention is a second wireless transceiver for transmitting and receiving data with the first wireless transceiver, a display unit for displaying a temperature signal received from the second wireless transceiver, and the address information A second controller configured to generate a busbar temperature information request signal including the busbar temperature information request signal and transmit the generated busbar temperature information request signal to the temperature sensing module through the second wireless transceiver; It is characterized by including.

In addition, the first control unit of the present invention, the power supply cutoff control when the temperature detected by any one of the first temperature detection sensor, the second temperature detection sensor and the third temperature detection sensor exceeds a preset reference value. The signal is transmitted to the three-phase power supply facility.

In addition, the temperature monitoring unit of the present invention includes an external input unit to which an external control input signal is input, and an external output unit to which an external output signal is output, wherein the second controller is a busbar temperature of each phase received from the temperature sensing module. When information exceeds a preset reference value, an alarm sound is output through the external output unit, and when an external control input signal is received from the external input unit, the operation of the three-phase power supply facility is correspondingly controlled. .

In addition, the display unit of the present invention displays the busbar temperature received from the plurality of temperature sensing modules in the form of a color spectrum modulated by color, the second control unit based on the busbar temperature information of each phase The bolt loosening state of each busbar is calculated.

The busbar temperature monitoring device of the present invention has an advantage of being small as a wireless module, easy to install and detach from the busbar, and not affected by the type and size of the busbar.

In addition, the busbar temperature monitoring device of the present invention is automatically operated when the busbar power supply equipment of the switchboard is operated, there is an advantage that can prevent unnecessary power consumption.

In addition, the busbar temperature monitoring device of the present invention has an advantage that the abnormal state of the busbar can be easily identified because the temperature value is displayed in the form of color.

Hereinafter, the busbar temperature monitoring device of the present invention will be described with reference to the accompanying drawings.

The busbar temperature monitoring device of the present invention comprises a busbar temperature sensing module and a busbar temperature monitoring unit, which is attached to the copper plate of the busbar and the busbar temperature monitoring unit may be remotely located.

First, FIGS. 1 and 2 show busbars in which the busbar temperature sensing module of the present invention is installed. The busbar 50 is fixed by the busbar fixing bolt 40. The busbar temperature sensing module is composed of a main sensor module 20 attached to the S-phase busbar and sub-sensor modules 10 and 30 attached to the R-phase and T-phase busbars. In this embodiment, the main sensor module 20 is attached to the S-phase busbar, but the main sensor module 20 may be attached to the R-phase or T-phase.

Referring to FIG. 2, the sub sensor modules 10 and 30 have built-in temperature detection sensors 130a and 130c for detecting the temperature of the busbars 50. The temperature detection sensors 130a and 130c detect the temperature of the busbar 50 by contacting the busbar 50 through the busbar contact copper plates 11 and 31, and are implemented in the form of IC chips to detect the detected analog signal. It converts into a digital temperature signal and transmits it to the main module 100 of the main sensor module 20.

The main sensor module 20 includes a temperature detection sensor 130b, a power supply 160, a DC converter 170, and a main module 100.

Since the temperature detection sensor 130a has the same function and structure as the temperature detection sensors 130a and 130c, a detailed description thereof will be omitted.

The power supply 160 is connected to the busbar contact copper plate 11 on the R phase and the busbar contact copper plate 21 on the S phase, and an AC voltage is applied as an input voltage, and the AC voltage is rectified to a DC voltage.

The DC converter 170 down-converts the DC voltage output from the power supply 160 to the rated voltage of the main module 100. Here, the DC voltage output from the power supply 160 may be 5V, and the rated voltage of the main module 100 may be 3.3V.

The main module 100 is driven through the power supplied through the power supply 160 and transfers the supplied power to the temperature detection sensors 130a to 130c, and each phase received from the temperature detection sensors 130a to 130c. Busbar temperature information is transmitted to the busbar temperature monitoring unit 200 through a wireless communication network.

Referring to the process for power supply of the busbar is as follows. The voltage of the busbar contact copper plate 11 attached to the inside of the sub module 10 and the busbar contact copper plate 21 attached to the inside of the sub module 30 is supplied to the power supply 160. The potential difference between the two phases of a three phase busbar is AC 220V. The power supply 160 converts the AC 220V voltage into a DC 5V voltage. Thereafter, the DC converter 170 converts DC 5V into DC 3.3V. Thereafter, the converted DC 3.3V power is input to a control unit (not shown) inside the main module 100, and the main module 100 supplies DC 3.3V power to each of the temperature detection sensors 130a, 130b, and 130c. do. In addition, the DC 3.3V power supply is used as a power source for driving components (temperature detection sensor, wireless transceiver, etc.) inside the main sensor module 20.

3 schematically illustrates the components of the main module 100 and the busbar temperature monitoring unit 200 of the present invention.

The main module 100 includes a first control unit 110, a first wireless transmission / reception unit 120, a control output unit 140, an address input unit 150, and an address storage unit 160.

The first wireless transceiver 120 transmits and receives data with the busbar temperature monitoring unit 200 through a wireless network. In this embodiment, a zig-bee interface is used as a wireless protocol.

The control output unit 140 is a terminal for outputting a signal to cut off the bus bar power supply when the bus bar is in an abnormal state. That is, when the temperature value of the busbar exceeds a preset reference value, a control signal for shutting off the busbar power supply under the control of the first control unit 110 may be generated through the control output unit 140.

The address input unit 150 is a terminal to which an address assigned to each busbar temperature sensing module is input, and the address input is performed by using a hardware device at the time of manufacturing the busbar temperature sensing module. The input address information is stored in the address storage unit 160.

The first control unit 110 supplies DC power to each of the temperature detection sensors 130a to 130c, receives a temperature signal detected by each of the temperature detection sensors 130a to 130c, and the busbar temperature monitoring unit 200. When the bus bar temperature information request signal is received from the three-phase bus bar 50 is controlled to transmit to the bus bar temperature monitoring unit 200 through the first wireless transceiver 120.

The busbar temperature monitoring unit 200 may include a second wireless transceiver 220, a second controller 210, a display 250, a touch pad controller 240, a display controller 230, and an external output unit 270. And an external input unit 260.

The second wireless transceiver 220 transmits and receives data with the busbar temperature sensing module through a wireless network. In this embodiment, a zig-bee interface is used as a wireless protocol.

The second controller 210 controls the second wireless transceiver 220 in connection with transmitting the temperature information request signal, and controls the display controller 230 to display the busbar temperature value externally. The second control unit 210 of the present invention can be controlled by an external device through RS-232, RS-485, LAN and USB.

The external output unit 270 is a terminal for outputting a signal to output an alarm signal or cut off the bus bar power supply when the bus bar is in an abnormal state. That is, when the temperature value of the bus bar exceeds a preset reference value, an alarm sound or an alarm sound that cuts off the bus bar power supply may be generated through the external output unit 270 under the control of the second controller 210.

The external input unit 260 is a terminal through which an external control signal is input, and in particular, when a manual control signal is input, the external input unit 260 may control the operation of the three-phase power supply facility accordingly.

The display unit 250 displays the temperature values of the plurality of busbars, for example, a TFT LCD is used as the display device. As will be explained below, the temperature values of the present invention are expressed in the form of a color spectrum. In addition, the administrator may set a display method through a touch pad input, for example, a temperature reference value, an alarm function, and a display time may be set. The touch pad input is controlled through the touch pad controller 240.

Hereinafter, the operation between the main module 100 and the busbar temperature monitoring unit 200 of FIG. 3 will be described. First, the second wireless transceiver 222 transmits a temperature information request signal under the control of the second controller 210. This temperature information request signal includes address information of each main module 100.

When the temperature information request signal is received from the busbar temperature monitoring unit 200, the first controller 110 compares the address information included in the temperature information request signal with the address information stored in the address storage unit 150, and compares the result. If they match with each other, the temperature signals detected by the temperature detection sensors 130a to 130c are controlled to be transmitted through the first wireless transceiver 120.

When the temperature information of each busbar 50 is received from the main module 100, the second controller 210 converts the temperature information of each busbar 50 into corresponding color information and displays the color on the display unit 250. The temperature information of each busbar 50 is displayed in color.

4 illustrates the display unit 250 displaying the busbar temperature signal. According to the present invention, a quadrangle representing a plurality of busbars 50 is arranged on the display unit 250 in the form of a checker board, and the temperature value of each busbar is modulated into a color corresponding to the temperature of each busbar. It is colored within the rectangle. For example, the lower the temperature of the busbar 50, the closer to green color, and the higher the temperature of the busbar 50, the closer to red color, the manager can grasp the state of the plurality of busbars 50 at a glance. It becomes possible.

In addition, the display unit 250 may have a function of setting a color and a display time corresponding to the temperature level.

5 is a graph showing the relationship between the busbar bolt loosening state and the temperature change. The graph shows the result of observing the temperature change of the busbar while changing the loosening angle of the bolt 40 under a 220V AC voltage, a 30A current, and a temperature of 26 ° C, for 30 seconds for each bolt loosening angle. The maximum temperature of the reached busbar is shown. In the graph, it can be seen that as the busbar bolt loosening state (angle, rotation pitch) increases, the busbar temperature rises in proportion to this.

In the present invention, the second control unit 210 performs a function of calculating the busbar bolt loosening state based on the temperature value transmitted from the main module 100 using the relationship between the busbar bolt loosening state and the busbar temperature. do. If the temperature value exceeds the preset reference value, the second control unit 210 may determine that the busbar bolt loosening state is in an abnormal state, and may control to stop the operation of the three-phase power equipment.

1 is a view illustrating a bus bar temperature monitoring apparatus installed in a bus bar according to the present invention.

Figure 2 shows the configuration of the busbar temperature monitoring apparatus according to the present invention.

4 illustrates the display unit 250 displaying the busbar temperature signal.

5 is a graph showing the relationship between the busbar bolt loosening state and the temperature change.

Claims

A plurality of temperature sensing modules installed in a first phase busbar among a plurality of busbars installed in a three-phase power supply facility and detecting a temperature of the first phase busbar; And

A temperature monitoring unit coupled to the temperature sensing module through a wireless communication network and configured to display and monitor busbar temperature information received from the plurality of temperature sensing modules,

The temperature sensing module

A first temperature sensor for sensing a temperature of the first phase busbar, a first wireless transceiver for transmitting and receiving data with the temperature monitoring unit via the wireless communication network, and address information allocated to each of the temperature sensing modules When a bus bar temperature information request signal including address information is received from an address input unit to be input, an address storage unit to store the input address information, and the temperature monitoring unit, the received address information and its address are stored in the address storage unit. And a first control unit which controls to transmit the detected busbar temperature information to the temperature monitoring unit through the first wireless transceiver when the information is matched with each other.

The method of claim 1,

A plurality of second temperature sensors installed in a second phase busbar among a plurality of busbars and detecting a temperature of the second phase busbar and transmitting the detected busbar temperature information to the first controller; And

A plurality of third temperature sensor is installed in the third phase busbar of the plurality of busbars to detect the temperature of the third phase busbar and transmit the detected busbar temperature information to the first control unit,

When the busbar temperature information request signal is received from the temperature monitoring unit, the first controller transmits busbar temperature information detected by the first to third temperature sensing sensors to the temperature monitoring unit. monitor.

The method of claim 2,

The temperature sensing module is supplied with the voltage of the first phase busbar and the voltage of the second phase or third phase busbar as an AC input signal, and converts the input AC signal into a DC power supply to the first controller. Further comprising a DC power supply,

And the first controller provides the DC power supplied from the DC power supply unit as a power signal to the first to third temperature sensors.

The method of claim 2,

The temperature monitoring unit

A second wireless transceiver for transmitting and receiving data with the first wireless transceiver:

A display unit displaying a temperature signal received by the second wireless transceiver; and

Generating a busbar temperature information request signal including the address information, transmitting the busbar temperature information request signal to the temperature sensing module through the second wireless transceiver, and controlling the busbar temperature information received from the temperature sensing module to be displayed on the display unit; Bus bar temperature monitoring device comprising a second control unit.

The method of claim 2,

The first controller may control the power supply cutoff control signal to the three phases when the temperature detected by any one of the first temperature detection sensor, the second temperature detection sensor, and the third temperature detection sensor exceeds a preset reference value. Bus bar temperature monitoring device characterized in that the transmission to the power supply.

The method of claim 4, wherein

The temperature monitoring unit

An external input unit to which an external control input signal is input; And

Including an external output unit for outputting an external output signal,

The second control unit outputs an alarm sound through the external output unit when the busbar temperature information of each phase received from the temperature sensing module exceeds a preset reference value, and receives an external control input signal from the external input unit. Bus bar temperature monitoring device characterized in that to control the operation of the three-phase power supply correspondingly.

The method of claim 4, wherein

And the display unit displays the busbar temperature received from the plurality of temperature sensing modules in the form of a color spectrum in which the color is modulated by color.

The method of claim 3, wherein

And the second control unit calculates the bolt loosening state of the busbars of each phase based on the busbar temperature information of each phase.