KR100358557B1 - Breakdown observation system and method for street-ramp divergence circuit - Google Patents

Abstract

The present invention detects the effective power amount and voltage of each branch circuit of the distribution box as a filtered digital signal, calculates the load variation of the branch circuit, and remotely monitors / controls the failure state of the street lamp to minimize the influence of fluctuations in supply power. The present invention relates to a street light remote monitoring / control system and a method for improving fault detection accuracy.

The remote monitoring / control system according to the present invention remotely controls the lighting of a plurality of street lamps through a street lamp controller, calculates the load variation by receiving the effective power amount and voltage detection signal for each branch circuit, and then estimates and manages the failure state of the street lamp. According to the control signal, the corresponding branch path is controlled on / off, and the street lamp controller which detects the effective power amount and supply voltage variation for each branch circuit as filtered digital signal and sends it to the control computer through the two-way wireless data communication network. It is configured in conjunction.

Description

Breakdown observation system and method for street-ramp divergence circuit}

The present invention relates to a fault monitoring device and method for each branch circuit of a street lamp, and more particularly, to digitally control data on power consumption and supply voltage for each branch circuit, as well as remotely controlling the point and light of the street lamp by bidirectional wireless communication. The present invention relates to a fault monitoring device and a method for each branch circuit of a street lamp for remotely collecting and automatically determining a fault state according to load variation.

In general, a number of street lights are installed along the roadside and in parks, helping citizens to enjoy a smooth night life. However, repairing and controlling faults by checking the condition of numerous streetlights individually can result in a lot of time, labor and economic waste.

Accordingly, various street light remote control devices and control systems have been developed and used, ranging from automatic control and remote control systems using illuminance sensors or timers to street light remote control systems using wired or wireless communication networks. As it does not possess, it does not contribute to the convenience of citizens through quick breakdown measures.

Meanwhile, FIG. 1 is a view illustrating a conventional power consumption detection method in an embodiment of a remote street light monitoring method. As shown in FIG. 1, an infrared sensor 12 for detecting power consumption is conventionally described. Installed on the external top of the integrated power meter 10 of the distribution box to count the number of revolutions of the rotating plate 14 according to the amount of power consumption, the power consumption for each distribution box is detected, and through this, the lamp lights, the number of failure lamps, and the overload condition are detected. Watch.

In addition, a simple method using only a CT sensor is disclosed as a method of detecting a state of a street lamp in the related art, and the CT sensor is installed in a wiring part of each circuit of a distribution box and detects and compares changes in current consumption of each circuit. It is said to monitor the status and failure status.

However, in general, the supply voltage is changed depending on the weather, failure of the power line, or load, etc. In the case of the analog power detection or the current change detection method using a conventional CT sensor, the power consumption and Since the detection of the current proceeds without considering the change in the power supply, there is a problem that an error occurs in determining a fault condition.

In addition, discharge lamps such as high pressure sodium lamps and metal lamps, which are used as street lamps, cause a current backflow phenomenon due to reactive current when the lamp breaks down. have.

The present invention has been made to solve the above problems, an object of the present invention is to digitally detect the effective power amount and supply voltage of each branch circuit of the street lamp distribution box and calculate the variation of the load by each branch circuit through this By detecting and determining the number of faulty lamps, it minimizes the effects of fluctuations in the KEPCO supply power supply, filters reactive current flowing back from the ballast when a high-voltage discharge lamp breaks down, and then connects a number of high-voltage discharge lamps connected to each branch circuit. It is to provide a fault monitoring method for each branch circuit of a street lamp that can accurately detect the number of fault lamps among them.

Another object of the present invention is to provide a failure monitoring method for each streetlight branch circuit using a digital effective power amount and supply voltage detection and load fluctuation, which facilitates the countermeasure of the failure condition of the street light using the above-described method.

1 is a configuration diagram of an integrated power meter for reading power consumption in a conventional analog system.

Figure 2 is a block diagram showing a schematic configuration of a failure monitoring apparatus for each streetlight branch circuit according to the present invention.

Figure 3 is a block diagram showing the internal configuration of a street lamp controller according to the present invention.

4 is a circuit diagram illustrating a connection state of a street lamp controller and a power line according to the present invention;

5 is a flowchart illustrating a fault monitoring method for each branch circuit of a street lamp according to the present invention;

<Description of Symbols for Main Parts of Drawings>

10. Integrated power meter 12. Infrared sensor

20. Control computer 23. Monitor

26. System DB 30. Street Light Controller

31. Wireless transceiver 32. Power measurement value storage means

36.CT sensor 37. Active power detector

38. Voltage sensor 39. Supply voltage detector

40. Street light 41. System monitoring and reset circuit

42. Magnetic S / W 44. Relay drive circuit

45. Microprocessors 46. Digital detection means

In order to achieve the above object, the street lamp remote monitoring / control system according to the present invention includes a control computer, a street lamp controller, and a branch circuit, and remotely controls the street lamp controller by a control signal of the control computer to turn on / off each branch circuit. In the system for controlling the off and detecting the amount of change in the effective power of each branch circuit and transmitting the detection signal to the control computer, a relay for controlling the flashing of a plurality of street lamps by turning on / off the branch circuit under the control of the following microprocessor. Drive means; Effective for converting the circuit current value from the current sensor installed in each branch circuit and the supply voltage from the voltage sensor at the power input terminal into a digital signal, and then outputting the digital signal for the effective power through a predetermined filtering circuit and a multiplier circuit. Digital detection means comprising a power detector and a supply voltage detector for converting an analog value from the voltage sensor into a digital signal and outputting a digital signal with respect to the square of the supply voltage through a predetermined filtering circuit and a multiplier circuit; System reset means for setting the setting environment of each branch circuit to an appropriate value; And operating the relay driving means in accordance with a control command signal of the control computer to control on / off the streetlight branch circuit, and obtain measurement information on the effective power amount and supply voltage from the digital detection means at regular intervals to reset the system. It characterized in that it comprises a microprocessor for transmitting the measurement information to the control computer when exceeding a predetermined allowable variation range after comparing with the set value of.

The control computer may compare the measured information received from the street lamp monitoring apparatus with the normal load amount to calculate software for calculating the number of fault lamps for each branch circuit of the street lamp.

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

2 is a block diagram illustrating a schematic configuration of a fault monitoring apparatus for each streetlight branch circuit according to the present invention.

As shown in FIG. 2, the present invention relates to a control computer 20 having a monitor 23 and a system DB 26, and a plurality of control computers 20 connected to each other via a two-way wireless data communication network. A plurality of street lamp controllers 30 for remotely monitoring / controlling the street lamps 40, a street lamp mechanism 40 connected to each of the branch circuits to the street lamp controller 30, and an instruction of the control computer 20. By the repair company's portable terminal 60 for repairing the failure of the street lamp, etc. are made in connection with each other.

The two-way wireless data communication network is for transmitting the control command signal from the control computer 20 and the failure detection signal from the street lamp controller 30, etc., and the existing communication network system 50 and a plurality of facilities installed in a predetermined area. It consists of a plurality of communication network base station 55 in charge of wireless data transmission and reception with the three streetlight controller (30).

The control computer 20 outputs the on / off control command of the street lamps for each circuit to the street lamp controller 30 to remotely control the lighting of the street lamps, and to effect each branch circuit from the street lamp controller 30. Receiving information such as the amount of power and the supply voltage to determine the lighting state of the street lamp, the number of failure lamps and the overload state, and the information about each street lamp (or distribution box) to the database DB 26 to manage. In addition, a message on the monitor 23 is displayed on the monitor 23 so that the administrator can easily determine.

In addition, when it is determined that the streetlight distribution box power outage and circuit-specific lighting or individual lighting (failure), the control computer 20 uses a wireless data communication network to send a message such as the location of the failure, failure status, etc. Or by sending to the portable terminal 60 of the staff in charge) it is possible to quickly troubleshoot.

In particular, the control computer 20 receives information about the effective power amount and supply voltage variation of each circuit from the streetlight controller 30 and automatically calculates the current load for each circuit to detect the failure and overload of the streetlight. Estimate. At this time, the load amount for each branch circuit is calculated from the received actual power value and the supply voltage value by the formula of R = V ² / P.

In addition, the street light controller 30 is installed in the distribution box having a wireless transmission and reception means (31, 34), a circuit control means and a digital detection means 46, etc., the street light in accordance with the control command of the control computer 20 Control the lights on in bulk or in part, and check the lights on, off, power supply and supply voltage for each distribution box circuit, and if it is estimated to be abnormal, send the information about this to the control computer 20 through the base station 55. Send it out. In addition, according to the request of the control computer 20, the integrated power consumption of the distribution box is remotely read and transmitted.

On the other hand, Figure 3 is a block diagram showing the internal configuration of the street lamp controller 30 according to the present invention, as shown in Figure 3, the street lamp controller 30 receives a control signal from the control computer 20 And a plurality of wireless transceivers 31 and communication modems 34 for transmitting digital detection signals to the control computer 20, and magnetic S / Ws 42 of the branch circuits according to the control signals. Digital detecting means for detecting the relay driving circuit 44 and the relay 43 for controlling the lighting of the street lamp and the amount of change of the effective power and supply voltage of each branch circuit and providing them to the microprocessor 45 as a digital signal ( 46) and a system monitoring and reset circuit 41 for monitoring the state of the street lamp controller 30 and resetting the setting environment for the number of street lamps, load amount, effective power amount, supply voltage, etc. for each branch circuit; Effectiveness Power measurement value storage means 32 for accumulating and storing the amount of power, a plurality of status display LED 33 for displaying a fault condition, the constant voltage supply unit 35, and the means built in the street lamp controller 30 It comprises a microprocessor 45 for controlling and centralizing the overall operation required for fault detection and control of the street light.

Further, the microprocessor 45 compares the measured value detected by the digital detecting means 46 every predetermined time (about 10 minutes) with the setting value of the system reset circuit 41, and compares the allowable variation range. If exceeded, the measured value information is transmitted to the control computer 20 by controlling the wireless transceiver 31 and the communication modem 34, and the power measurement value is stored according to the control command signal of the control computer 20. The integrated power amount information of the means 32 is sent out, and the relay drive circuit 44 is controlled to control the street lamps of the respective branch circuits on and off.

In addition, the digital detection means 46 detects an effective amount of power by using a circuit current value from the CT sensor 36 provided for each branch circuit and a supply voltage from the voltage sensor 38 of the power input terminal. It consists of an effective power detection unit 37 for outputting a power supply, and a supply voltage detection unit 39 for converting the supply voltage measured from the voltage sensor 38 into appropriate digital information as necessary and outputting the digital power.

In addition, the effective power detector 37 is to automatically calculate the power consumption value of each branch circuit as a digital signal and provide it to the microprocessor 45, and the analog value detected from the CT sensor 36 is A / After converting into a digital signal through the D conversion circuit, the high pass filter circuit passes only the high frequency value, converts the analog signal detected by the voltage sensor 38 into a digital signal, and then converts the digital signal to the converted current and voltage. The signal is multiplied by a multiplier circuit to produce a digital signal for effective power, which is then filtered by a low pass filter.

In addition, the supply voltage detector 39 converts the analog signal detected from the voltage sensor 38 into a digital signal by an A / D conversion circuit and then performs high pass filtering to remove the low frequency value, and the voltage sensor 38 After converting the analog signal from) into digital signal by another A / D conversion circuit, multiply these digital voltage signals by multiplier circuit to calculate voltage square value (V ² ) and filter it with low pass filter. The digital signal for the supply voltage is output and provided to the microprocessor 45.

As described above, the present invention determines the failure state or the number of lamps through the load resistance of the street lamp (or branch circuit) having a constant value regardless of the fluctuation of the current and voltage of the power supply, so It is possible to effectively prevent the error of detection determination due to the current backflow phenomenon.

In addition, in detecting the effective power (P) and the square value of the voltage (V ² ) for each branch circuit, the current is reversed from the detected information by converting the detected analog signal into a digital signal and then performing an appropriate filtering process. This will remove the value by.

4 is a circuit diagram illustrating a connection state of the street light controller 30 and the power line by way of example. As shown in FIG. 4, the integrated power meter 47 and the primary car breaker 48 are provided at the power input unit of the distribution box. In the branch circuit of the street lamp is installed and the magnetic S / W 42 and the secondary car breaker 49 is provided for each branch circuit, each magnetic S / W (42) to control the lighting of the street lamps of each branch circuit. ) Is connected to the relay drive circuit 44, the CT sensor 36 is installed on the output side of the secondary automobile circuit breaker 49 of each branch circuit to detect current flowing through each circuit, and the primary vehicle of the power input unit. The voltage sensor 38 is provided on the output side of the short-term 48 to detect the voltage of the power supply.

5 is a flowchart illustrating a fault monitoring method for each branch circuit of a street lamp according to the present invention.

First, when the control computer 20 installed in the central control room is executed automatically or manually to control the point, off control command for the street lamp branch circuit of a specific area, the control command signal is transmitted to the communication base station 55 of the area. It is transmitted to the corresponding street lamp controller 30. (S51)

Accordingly, the street light controller 30 analyzes the control command signal by the microprocessor 45 and then controls the relay drive circuit 44 to turn on or off the branch circuits so that the street lamps can be switched on or off by branch circuit. Done. In addition, the street lamp controller 30 determines whether the street lamp is turned on or off by turning on or off each branch circuit through the generation of the effective power from the effective power detector 37 for a predetermined period (seconds). Then, the control computer 20 transmits it to the control computer 20. (S52) Accordingly, the control computer 20 displays the point and the lighting of the street lamp on the monitor 23.

In addition, when the control command signal includes a power consumption detection command, the effective power amount accumulated in the power measurement value storage unit 32 is read and wirelessly transmitted to the control computer 20.

When the street lamp is normally turned on, the street lamp controller 30 automatically detects an effective amount of power and a supply voltage of each branch circuit at a predetermined cycle (about 10 minutes) (S53).

In addition, the street light controller compares the detected value with a set value (effective power amount) for normal operation (S54), and determines whether the deviation is within an allowable range (S55).

At this time, when the deviation is within the allowable range, the street light controller 30 continuously monitors and monitors the amount of power and the voltage of the branch circuit at a predetermined cycle, and when the deviation is exceeded, the information about the detected effective power amount and the voltage. This is wirelessly transmitted to the control computer 20 through the base station 55. (S56)

The control computer 20 receives this and calculates the abnormal load amount of the branch circuit using the load calculation formula (R = V ² / P). (S57) In addition, the normal load amount of the branch circuit having a failure ( By the number of street lamps connected to the branch circuit) and the abnormal load amount is mutually compared to determine the range of the load variation (S58).

At this time, when the abnormal load amount is larger than the normal load amount, the control computer 20 estimates the overload state and displays a message for this on the monitor 23 (S59).

In addition, when the abnormal load amount is less than the normal load amount, the control computer 20 can easily determine the number of fault street lights in comparison with the load amount of one street light, and displays the information on the monitor 23. S60)

In addition, according to the determination result, the lighting and failure status of the street lamps by day and period, and the maintenance work instructions corresponding thereto are automatically output.

On the other hand, the control computer 20 is to transmit a message about the failure location, the failure details, etc. to the portable terminal 60 of the maintenance company (or staff in charge) according to the estimated failure or overload condition of the street light as described above do. In addition, a message such as occurrence of a predetermined number of failure lights (night), a power failure (day or night), or abnormal lighting (day) can be sent based on the failure details. (S61)

In addition, as the control computer 20 transmits a failure estimation signal, the street light controller 30 lights the corresponding status display LED 33 to facilitate troubleshooting.

In addition, during the normal recovery operation, the maintenance company (or the employee in charge) transmits a control point for turning off the failure, a light off control signal to the control computer 20 by using the portable terminal 60 of the control computer 20. The normal recovery operation and fault check can be smoothly performed by executing the point and extinguishing control on the branch circuit of the distribution box.

In addition, when the street lamp is normally restored, the street lamp controller 30 sends it to the control computer 20 to be notified of the recovery situation to the portable terminal 60 of the maintenance company (or staff in charge) to prevent duplicate work and complete the work Whether it can be easily confirmed.

The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the technical idea of the present invention.

According to the present invention made as described above, by ensuring an effective monitoring system for failures such as street lights, to solve the vulnerable areas of vulnerable districts, improve public service and reliability, as well as the effective power amount and supply voltage of each circuit as a digital signal By detecting and judging and automatically estimating the number of breakdown lamps for each branch circuit according to the load variation, it minimizes the effects of reactive current and supply power fluctuations flowing back from the ballast when the high-pressure discharge lamp lamp breaks down and improves the accuracy of fault detection. By doing so, it is possible to reduce the management cost through the management efficiency of the street lamp facility.

Claims (4)

It is composed of control computer, street light controller and branch circuit, and remote control of street light controller by control signal of control computer to control on / off of each branch circuit, and to detect the change of effective power of each branch circuit to the control computer In a system for transmitting a detection signal Relay driving means for controlling the lighting of a plurality of street lights by turning on / off a branch circuit under the control of the following microprocessor; Effective for converting the circuit current value from the current sensor installed in each branch circuit and the supply voltage from the voltage sensor at the power input terminal into a digital signal, and then outputting the digital signal for the effective power through a predetermined filtering circuit and a multiplier circuit. Digital detection means comprising a power detector and a supply voltage detector for converting an analog value from the voltage sensor into a digital signal and outputting a digital signal with respect to the square of the supply voltage through a predetermined filtering circuit and a multiplier circuit; System reset means for setting the setting environment of each branch circuit to an appropriate value; And The relay driving means is operated in accordance with a control command signal of the control computer to control the streetlight branch circuit on / off, and the measurement information about the effective power amount and the supply voltage is obtained from the digital detection means at regular intervals of the system reset means. And a microprocessor for transmitting the measurement information to a control computer when the predetermined value is exceeded after comparing with a set value. delete delete delete