KR20090080736A - A monitoring system for line of short circuit/breaking during day time - Google Patents

Abstract

A daytime monitoring system for short-circuit and disconnection of a line is provided to reduce maintenance cost for installing and maintaining a line disconnection monitoring device by supplying direct current safety power source of a low voltage and installing the line disconnection monitoring device at a specific lamp post. A daytime monitoring system for short-circuit and disconnection of a line includes a daytime short-circuit monitoring module, a line disconnection monitoring device, a main control monitoring module and a line switch. The daytime short-circuit monitoring module(220) includes a switch for controlling supply of safety power source on a safety power source generator and a line. The line disconnection monitoring device(240) includes an ADC circuit, a main control monitoring unit and a battery used for a driving power source of the main control monitoring unit and a light lamp Zigbee communication module in a daytime. The main control monitoring module(210) includes a Zigbee communication module(214), a main control unit(212) for determining short-circuit or disconnection of the line and an air radio frequency communication module(211) for transmitting status information of the line obtained at the main control unit. The line switch(230) is subject to the control operation of the main control unit. The line switch connects the main power source to the line disconnection monitoring device at night time and connects the safety power source to the line disconnection monitoring device at day time.

Description

A monitoring system for line of short circuit / breaking during day time}

The present invention relates to a short circuit / disconnection daytime monitoring system of a line, and more particularly, a circuit element capable of detecting a low voltage DC 30V safety power supply to a line breakdown monitor mounted on a column to monitor disconnection on a line during the daytime. It is related to the short-circuit / disconnected daytime monitoring system of the line that can monitor the line outage and install the line break monitor only in the line section to be monitored.

Various control systems have been proposed to control streetlights scattered on the street, and can be generally divided into models controlling only distribution boxes and models controlling both distribution boxes and street lamps. The former has a server computer in the central center and communicates with the distribution box using VHF communication or CDMA communication method. The controller can be installed in the distribution box to perform branch control of the street lamp connected to the distribution box and the constant time difference control. It is difficult to establish a dedicated communication line for separate control in addition to the power supply line between the lamppost and the lamppost and the lamppost, so that a controller is installed in each lamppost to perform power line communication (PLC) with the distribution box controller. .

Power line communication is a method for controlling street light poles through a line supplying power to street light poles. Power line communication has a problem in that power lines are unstable, stabilization of old ballasts, and frequent breakdowns in the column controllers increase maintenance costs. In other words, the current streetlights use the power line communication as the communication means of the streetlight main controller due to the disconnection and deterioration of the power supply line. There was a problem that it takes a lot of time and money for maintenance including street lamp main controller because it is not well informed timely monitoring information including the column.

On the other hand, there is no risk of short-circuit accidents during the day because the distribution box does not supply power from the distribution box prior to the centralized control system of the streetlight. In order to supply power. However, when supplying a voltage of 220V during the day, there is a risk of electric shock accidents when a short circuit, and because of the high power consumption, a method of supplying a low voltage of 30V AC (hereinafter referred to as a safety power supply) is used during the day. In this case, since the voltage supplied at night and day is different, it is necessary to use both a 30V daytime transformer and a nighttime 220V transformer to drive the power line communication module for the column monitoring. There was a problem of increasing.

In addition, the safety power of 30V AC supplied during the day flows into the ballast installed in the column as it flows through the line.However, the power is not consumed as much as the lamp is turned on. As much power is consumed as. Therefore, in order to prevent this, additional devices such as relay circuits are installed in each column to cut off the safety voltage supply to the ballast. However, this method requires a lot of installation costs and costs to maintain them. There was a problem.

Therefore, in order to solve the above problem, while supplying a low voltage DC safety power supply to monitor the short circuit / disconnection of the line supplying power to the light pole during the day, the line disconnection monitoring that can measure the safety power supply The purpose is to provide a short-circuit / disconnected daytime monitoring system for the tracks, which can be installed only on the specific column set as the target of monitoring and reduce the cost of installing and maintaining the track disconnection monitoring.

 In order to achieve the above object, the short-circuit / disconnection day monitoring system according to the present invention, the safety power generator for generating a safety power supply of the DC state by receiving the main power during the day, and detects the flow of overcurrent on the line And a switch for controlling the supply of safety power and controlling the supply of safety power on the line under the control of the line monitoring control unit for controlling the supply of safety power and transmitting the detected line state to the main control unit of the main control module. A weekly short circuit monitoring module; An ADC circuit for receiving safety power from the safety power generator and converting the signal into a digital signal, a main control unit for determining whether a line is out of power by receiving a signal from the ADC circuit, and power failure information of the line determined by the main control unit A line break monitor configured to include a ZigBee communication module for transmitting the battery and a battery which is charged using the main power at night and is used as a driving power of the main control unit and the ETJ ZigBee communication module during the day; Central ZigBee communication module for receiving the power outage information of the line from the column ZigBee communication module, the state information of the line received by the central ZigBee communication module and the state of the line received through the line monitoring control unit to collect the short circuit of the line Or a main control unit configured to include a main control unit for determining whether the wire is disconnected, and an air communication module for transmitting the state information of the line determined by the main control unit to a remote server; And a line switch that connects the main power to the line break monitor at night under the control of the main control unit, and connects the safety power to the line break monitor during the day.

The short circuit / disconnection day monitoring system according to the present invention, the installation and maintenance cost of the line disconnection monitor by generating and supplying a low-voltage direct current as a safety power to monitor the short circuit / disconnection of the line supplying power to the column during the daytime It can reduce the cost, and can be equipped with a line break monitor only to a specific column in the section to monitor the disconnection or short circuit economically it is possible to easily identify the abnormality of the line and the location of the accident.

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

1 is a view showing the configuration of the short circuit / disconnection day monitoring system of the track according to the present invention, Figure 2 is a block diagram showing the configuration of the line disconnection monitoring unit constituting a short circuit / disconnection day monitoring system of the track according to the present invention. .

Referring to Figure 1, the short-circuit / disconnection daytime monitoring system according to the present invention, the main control module 210, the weekly short-circuit monitoring module 220, the line switch 230 and the line mounted on the distribution box 200 It comprises a state monitor 233 and the line disconnection monitor 240 mounted on the column. Here, the main control module 210 and the line disconnection monitor 240 transmits and receives information on a line using Zigbee communication, the line disconnection monitor 240 is a plurality of columnar installed on the line within the Zigbee communication distance It may be installed in one or more columnar which is set as a monitoring target.

The main control module 210 includes a main control unit 212, a user interface 213, a central Zigbee communication module 214, and an over-the-air communication module 211 to monitor or control a street light, and disconnect the line. Receive notification of the power outage of the line by using the Zigbee communication from the monitor 240, receiving the notification whether the overcurrent flows on the line through the line monitoring control unit 221 to determine whether the line is disconnected or short-circuit on the line, If necessary, it notifies the remote server (not shown) through the air communication module 211.

The main control unit 212 receives the control command from the remote server or the user interface 213 to perform the control, or monitors the line disconnection monitor 240, the line state monitor 233, the weekly short circuit monitoring module 220, or itself. Collect data and send to remote server.

The main controller 212 controls the line switch 230 to switch to supply the main power 100 to the track at night, and to switch to supply the safety power to the track during the day.

The user interface 213 receives a user's input through a keyboard or outputs a state of a column or a line to the LCD.

The central ZigBee communication module 214 receives whether the line is out of power from the columnar ZigBee communication module 244 installed in the line disconnection monitor 240 and transmits the line to the main control unit 212.

The over-the-air communication module 211 transfers each columnar or track state data collected in the main controller 212 through the central Zigbee communication module 214 to the remote server through CDMA communication or the Internet.

The weekly short circuit monitoring module 220 includes a line monitoring controller 221, a safety power generator 223, and a switch 222, and generates safety power during the day under the control of the main control unit 212. It supplies and monitors whether the overcurrent flows on the line in the line monitoring control unit 221 and transmits it to the main control unit 212.

The line monitoring controller 221 cuts off the supply of safety power by controlling the switch 222 through an MCU connected to the circuit device when an overcurrent of 2 A or more is measured in a circuit device, for example, a FET due to a short circuit of the line. , And transmits the overcurrent state to the main control unit 212. In such a case, the line monitoring controller 221 cuts off the supply of the safety power supply by switching the switch 222 when the first overcurrent is measured, and measures it at a predetermined time. If the overcurrent is continuously measured, it is determined as a short circuit. If the over current is no longer measured, the switch 222 is restored to supply the safety power to the line.

The safety power generator 223 generates a safety power source for supplying a line by transforming a main power source of AC 220V into a low voltage DC 20V to 30V, for example, 24V.

The switch 222 is switched to supply the safety power generated by the safety power generator 223 to the line during the day under the control of the line monitoring control unit 221, and when an overcurrent flows in the line, the line monitoring control unit 221 Under control, the safety power is cut off from the line. Here, the switch 222 is switched to supply the safety power to the line when the change from the night monitoring mode to the weekly monitoring mode, the power circuit discharged from the circuit elements, for example, the capacitor included in the ballast of each column In order to prevent damage to the monitoring module 220, the line monitoring control unit 221 monitors the main power and does not supply safety power to the line immediately when the supply of the main power is cut off, and the capacitors of each lamp are sufficiently discharged. Wait for a few seconds until the switch to switch the switch 222 to supply the safety power.

The line disconnection monitor 240 shown in detail in FIG. 2 includes a power supply device 241, a charging circuit 242, a battery 243, an ADC circuit 244, a main control unit 245, and a Zigbee ZigBee communication module ( 246).

The line disconnection monitor 240 serves to notify the main control module 210 by monitoring the power failure on the line by receiving main power or safety power, and monitoring the presence of power failure by receiving the main power at night. The power supply is supplied with a safety power supply to monitor the line's power outage.

The power supply device 241 converts the main power of the AC 220V supplied at night to 5V and supplies it to the charging circuit 242.

The charging circuit 242 charges the battery 243 using a voltage of 5V supplied from the power supply 241. In addition, the charging circuit 242 is connected to the main control unit 245 to monitor whether power is normally supplied to the track during the night.

The battery 243 is charged using the main power supplied at night, and is used as the power for operating the line disconnection monitor 240 during the day. In addition, when an abnormality or a power failure occurs on the line, it is used as a driving power source of the line disconnection monitor 240.

In the past, in order to perform power line communication to the power supply unit 241, a safety power of about 30 V AC was applied during the day, and a 220 V main power was applied at night, so that the safety power supply and the main power were converted to appropriate voltages using different transformers. However, the present invention does not require a transformer of various capacities because it performs line monitoring and communication using the battery 243 charged at night as a power source during the day.

The ADC circuit 244 is provided with several hundreds of resistors, and when a safe power supply 24V is supplied on the lines, several tens of currents flow along the lines. In the ADC circuit 244, when safety power is stably supplied on the line, the ADC circuit 244 converts the digital signal into a digital signal and transmits it to the main control unit 245.

The main control unit 245 monitors a signal transmitted from the ADC circuit 244 during the day and a signal transmitted from the charging circuit 242 at night, thereby detecting an abnormality on the line, that is, a power failure. The line state information is transmitted to the central ZigBee communication module 216 through the column ZigBee communication module 246.

When the line ZigBee communication module 246 detects a line abnormality in the main control unit 245, the main control unit 245 detects the line state information detected under the control of the main control unit 245, that is, the power failure state of the line. The central Zigbee communication module 214 is notified. The light pole Zigbee communication module 246 is driven using the main power 100 transformed from the power supply device 241 at night, and is driven by using the battery 244 charged through the main power supply 100 at night during the day do. The location information of the column is input to the pillar ZigBee communication module 246, so that even if the ZigBee communication with the central ZigBee communication module 214 is carried out in many-to-one manner, it is possible to determine in which column the information is transmitted. In addition, when the line ZigBee communication module 246 and the center ZigBee communication module 214 in which the abnormality of the line is sensed are outside the communication distance, another column ZigBee communication module (not shown) adjacent to the column ZigBee communication module 246 and the relay are not relayed. By performing the communication with the central ZigBee communication module 214 can transmit the line status.

The line switch 230 is switched to allow the AC 220V main power to be supplied to the track at night under the control of the main controller 212, and to switch the safety power of DC 24V to the track during the day. In addition, in order to prevent the main power from flowing back to the safety power generator 223 of the weekly short-circuit monitoring module 220, the main power is connected to the main contact of the line switch 230, and the safety power supply is an auxiliary contact of the line switch 230. Connect to each other to operate mutually exclusive.

The line state monitor 233 is configured to be connected to the line switch 230 that connects the main power supply 100 to the line. The line state monitor 233 monitors the amount of power flowing on the line during the night to detect whether a short circuit occurs on the line. Watch.

Hereinafter, a description will be given of a method for monitoring the track state during the day using the above-described line weekly monitoring system.

3 is a view for explaining a method for determining a short circuit / disconnection of a track using the track daytime monitoring system according to the present invention, Figure 4 is a short circuit / disconnection of the line using the track daytime monitoring system according to the present invention It is a figure for demonstrating the other method of judgment.

First, the battery 243 is charged through the charging circuit 242 of the line disconnection monitor 240 using the main power at night. At this time, the main control unit 245 of the line disconnection monitor 240 monitors the state of the charging circuit 242 to monitor whether the main power is normally supplied on the line. If the main power is not normally supplied on the line, the main control unit 245 determines that the power failure has occurred in the line, the central ZigBee communication module 214 of the main control unit 210 through the column ZigBee communication module 246 Notify them.

During the day when the light is turned off, the safety power generator 223 generates the safety power of 24V DC under the control of the main controller 212, and the line switch 230 cuts the main power and connects the safety power to safety on the line. Allow power to be supplied. At this time, the weekly short circuit monitoring module 220 waits for several seconds until the capacitor constituting the ballast installed in each column is discharged to switch the switch 222 so that safety power is supplied to the line.

The safety power generated by the safety power generator 223 is supplied to the ADC circuit 244 of the line break monitor 240, and the ADC circuit 244 continuously supplies the safety power and DC 24V supplied from the safety power generator 223. The digital signal is converted into a digital signal and transmitted to the main control unit 245. The main control unit 245 continuously monitors the signal transmitted from the ADC circuit 244 to determine the abnormality of the line. At this time, the line disconnection monitor 240 operates by using the battery 243 charged at night as a power source, and operates continuously even when safety power is not supplied because the battery 243 is used as a power source. The main control unit 212 may be notified.

If there is an abnormality from the signal transmitted from the ADC circuit 244, that is, no signal is transmitted, it is determined that a power failure has occurred in the line, and the central Zigbee communication module 214 of the main control module 210 is determined through the columnar Zigbee communication module 246. ), And the central Zigbee communication module 214 transmits it to the main control unit 212.

Subsequently, when the main controller 212 transmits the abnormal track to the server through the over-the-air communication module 211, the server recognizes this and can cope with the abnormal track.

On the other hand, the weekly short-circuit monitoring module 220 may detect that a short circuit is generated on the line. When a sudden overcurrent flows to the circuit device mounted on the line monitoring controller 221, that is, the FET, the switch connected to the MCU ( The control unit 222 blocks the safety power supply to the track, and notifies the main controller 212 that a short circuit occurs on the track.

The main controller 212 collects all the information transmitted from the line disconnection monitor 240 and the weekly short circuit monitoring module 220 to determine whether the line is disconnected or short-circuited.

Here, the method of determining whether the track is disconnected or short-circuited is as follows.

For example, when the line break monitor 240 notifies that a power failure occurs on a line, and the weekly short circuit monitoring module 220 notifies that an overcurrent is detected, the main control unit 212 determines that a short circuit occurs in the line. In addition, when the line break monitor 240 notifies that a power failure occurs on the track, and the weekly short circuit monitoring module 220 notifies that safety power is normally supplied on the track, the main control unit 212 transmits it to the track. A disconnection has occurred.

As shown in FIG. 3, the line disconnection monitor 240 may be mounted on only one light pole positioned at the end of a Zigbee communication distance among a plurality of light poles installed on one line connected to the distribution box 210, and illustrated in FIG. 4. As described above, it may be mounted on a plurality of pillars installed on one track connected from the distribution box 210, and may be mounted on each column located at the end of the track section which is set as a monitoring target by dividing the track by section. The location information, etc. of the column is input to the columnar ZigBee communication module 246 built in the line disconnection monitor 240, so that the location of the disconnection in the line can be easily identified.

For example, as shown in FIG. 3, when the line break monitor 240a is installed only in the light poles located at the end of the line among the light poles installed on the line within the Zigbee communication distance, the main control unit 212 is collected. Using the information, it is possible to determine that a short circuit or a disconnection has occurred on the track during the day in a manner as described in [Table 1].

On the other hand, as shown in Figure 4, the line is divided by section within the Zigbee communication distance (CA, AB) to set the monitoring target, and the line disconnection monitor (240b, 240c) in the column located at the end of each line section In the case of installation, it is possible to easily determine the track section in which the short circuit or disconnection occurred. In this case, when disconnection of the line is detected in the line break monitor 240c, but the line break monitor 240c and the main control module 210 are outside the Zigbee communication section, the line break monitor 240b and the line break monitor 240c. Zigbee communication to the relay is transmitted to the main control module 210. At this time, since the position information of the light pole is input to the light pole Zigbee communication module 246 built in the line break monitors 240b and 240c, it is easy to identify that a short circuit or a disconnection has occurred between the line sections AB. Can reduce the scope of investigation.

As described above, in the detailed description of the present invention, specific embodiments have been described, but 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 claims below and equivalents thereof.

1 is a view showing the configuration of a track daytime monitoring system according to the present invention.

Figure 2 is a block diagram showing the configuration of the line disconnection monitoring unit constituting the track daytime monitoring system according to the present invention.

Figure 3 is a view for explaining a method for determining a short circuit / disconnection of a line using the track daytime monitoring system according to the present invention.

Figure 4 is a view for explaining another method for determining the short circuit / disconnection of the track using the track daytime monitoring system according to the present invention.

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

100: main power 210: main control module

211: air communication module 212: main control unit

213: user interface 214: central Zigbee communication module

220: weekly short circuit monitoring module 221: track monitoring control unit

222 switch 223 safe power generator

230: track switch 233: track status monitoring

240: line break monitoring 241: power supply device

242: charging circuit 243: battery

244: ADC circuit 245: main control unit

246: Zigbee communication module

Claims (7)

Safety power generator that generates safety power in DC state by receiving main power during the day, and controls the supply of safety power by detecting overcurrent flowing on the line and transmits the detected line status to the main control part of the main control module shown below. A weekly short-circuit monitoring module comprising a line monitoring control unit and a switch controlling the supply of safety power on the line under the control of the line monitoring control unit; An ADC circuit for receiving safety power from the safety power generator and converting the signal into a digital signal, a main control unit for determining whether a line is out of power by receiving a signal from the ADC circuit, and power failure information of the line determined by the main control unit A line break monitor configured to include a ZigBee communication module for transmitting the battery and a battery which is charged using the main power at night and is used as a driving power of the main control unit and the ETJ ZigBee communication module during the day; The central Zigbee communication module for receiving power outage information of the line from the columnar Zigbee communication module, the state information of the line received by the central Zigbee communication module and the state of the line received through the line monitoring control unit A main control module configured to include a main control unit for determining whether the wire is disconnected, and an air communication module for transmitting the state information of the line determined by the main control unit to a remote server; And A line loss position that connects the main power to the line break monitor at night under the control of the main controller, and connects the safety power to the line break monitor at daytime; Short circuit / disconnection day monitoring system of a track, characterized in that comprises a. The method of claim 1, The safety power supply is a short-circuit / disconnection daytime monitoring system for a line, characterized in that the DC 20V to 30V. The method of claim 1, The line disconnection monitoring unit is a short-circuit / disconnection day monitoring system, characterized in that it is mounted on a column located at the end of the Zigbee communication distance of a plurality of columnar is installed on one line connected from the distribution box. The method of claim 1, The track disconnection line monitor is mounted on a plurality of column poles installed on one track connected from a distribution box, and the short circuit of the tracks, which is mounted at each end of the track section which is divided into sections and is located at the end of the track section set as a monitoring target. / Disconnection weekly monitoring system. The method of claim 1, When the main control unit receives a voltage value of the safety power supply measured by the ADC circuit as a digital signal and determines that a power failure occurs on the line, the main control unit instructs the central Zigbee communication module to notify the central Zigbee communication module through the columnar Zigbee communication module. Short-circuit / disconnect daytime monitoring system The method of claim 1, The line monitoring controller is configured to include an FET circuit element for detecting the over-current flow on the line, and the MCU to be notified that the over-current is detected from the FET circuit element to deliver to the main controller and to control the supply of safety power supply Short circuit / disconnection daytime monitoring system for a track. The method of claim 1, The short-circuit monitoring module for the short-circuit, characterized in that for a predetermined time until the ballast is installed in the column is discharged after the main power is cut off when changing from the night mode to the day mode, short circuit / disconnection of the line Weekly surveillance system.

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