KR20110073018A - Hybrid roadlamp monitoring and control system - Google Patents

Abstract

PURPOSE: A hybrid streetlight monitoring control system is provided to optimize a battery by controlling the current, voltage, and temperature of an energy storage device in real time. CONSTITUTION: A data control unit(100) supplies power to a streetlight by dualizing an AC voltage and a DC voltage. The data control unit includes a power supply unit which converts the AC voltage into the DC voltage and supplies the DC voltage. A streetlight is comprised of an LED(101). A distribution box supplies the AC voltage to the streetlight. A control system(300) is connected to the distribution box and controls the operation of the data control unit.

Description

Hybrid Roadlamp Monitoring and Control System

The present invention relates to a streetlight supervisory control, and more particularly, to a hybrid streetlight supervisory control technology for monitoring and controlling a street light by dualizing an AC power source and a DC power source.

Existing street light control system was operated by installing a separate ballast and lighting equipment such as metal, sodium, etc. by using AC commercial power, which saves energy use by increasing power consumption as well as cumbersome installation and maintenance. There was a difficulty in drawing.

Recently, a method of controlling LED street lamps using a high efficiency LED street light control method using AC power of a distribution line, and a DC power source of a solar panel and a wind turbine has been attempted.

LED street light control method using the AC power does not need to install a separate ballast, there is an advantage that can replace the existing luminaires as it is, there is a limit in reducing the power consumption by using the AC input power. In other words, by using a converter that supplies power only to AC and converts to DC, power supply is always required and a considerable amount of power is wasted. In addition, even if it is possible to charge by the rechargeable battery, the management of the panel is not made, and the time of maintenance is unknown, so that the efficiency of the rechargeable battery occurs over time, resulting in a waste of power.

LED street lamp control method using DC power source using solar panel and wind turbine does not use AC power, so there is no need to construct a separate electric wiring, and there is an advantage of saving energy consumption, but in case of solar panel, weight and size In the case of wind turbines, it is difficult to calculate return on investment (ROI) due to the enormous budget of initial investment costs in wind turbines, and it is difficult to operate the system normally due to regional wind strength. have.

In recent years, the importance of energy management of facilities has been highlighted by using street lamps that will remain as the final ground surface of roads due to underground facilities of underground distribution lines and construction of underground roads. Improvements require more ways to manage and save energy more systematically.

An object of the present invention has been made in order to solve the above-described problems, it is an object of the present invention to provide a streetlight monitoring control system capable of charging, monitoring the state of the renewable energy of solar light and wind power to the energy storage device.

In order to achieve the above object, the present invention is installed in the street lamp and the power supply to the street lamp by dualizing the AC voltage and DC voltage, and a data control unit for determining or controlling the state of the street lamp, distribution box and data for supplying the AC voltage to the street lamp And a control system connected to the control unit and the distribution box to control and manage the operation of the data control unit and the distribution box.

The data controller operates by a power supply unit for converting and supplying an AC voltage to a DC voltage, a power management unit for storing, supplying, and managing a DC voltage supplied from a power supply unit and a DC voltage supplied from renewable energy, and a DC current supplied from a power management unit. A control unit for controlling the on / off of the street light, the control unit for receiving sensor data from the sensor installed in the street light and the power management unit to control the operation and the sensor receives the sensor data received from the center to command the on / off operation of the control unit It includes a processing device.

The power management unit rectifies the DC voltage supplied from renewable energy, the power monitoring unit monitors whether the DC voltage rectified in the rectifying unit maintains the reference voltage, and stores and stores the DC voltage supplied from AC power and renewable energy. An energy storage device for managing the state of the power supply and the power monitoring unit includes a switching unit for controlling the on / off of the power supply in accordance with the monitored DC voltage.

The power monitoring unit measures the remaining capacity of the renewable energy to turn off the power supply unit when the reference value is higher than the reference value, and when the lower than the reference value, the switching unit is characterized in that the power supply on.

According to the street lamp supervisory control system according to the redundant hybrid power supply according to the present invention, the battery state can be maintained in an optimized state through real-time management of the current, voltage and temperature state of the energy storage device and maintenance costs are reduced. It works. In addition, it is possible to ensure stability and reliability through the data control unit and battery management installed for each street light.

Hereinafter, the same reference numerals will be described in detail with reference to the accompanying drawings, with reference to the same components preferred embodiments of the present invention. The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and should be construed in accordance with the technical meanings and concepts of the present invention.

1 is a conceptual diagram showing a hybrid street light monitoring control system according to an embodiment of the present invention. Referring to FIG. 1, the street light monitoring control system 1 includes a data controller 100, a distribution box 200, and a control system 300.

The data control unit 100 is installed in the street lamp to supply the power to the street lamp by dualizing the AC voltage and DC voltage to determine or control the state of the street lamp. As a preferred embodiment of the present invention, the street lamp may be configured as an LED (101). In addition, the LED 101 may enable dimming control in which the brightness is adjusted by a relay or a triac.

The distribution box 200 supplies an AC voltage to the street lamp. In general, the supplied voltage is a power transmission voltage of AC 220V, and when transmitted to the street lamp, the data controller 100 connected to the street lamp may control the street lamp by converting it into a DC voltage of DC12V.

The control system 300 is connected to the distribution box 200 to control and manage the operation of the data control unit 100. The data controller 100 is connected to the distribution box 200 by a power line, and the distribution box 200 may be connected to the control system 300 by various communication methods, using an internet network that is currently used as a backbone network. The control system 300 may exchange data with the data control unit 100 by communicating with the distribution box.

FIG. 2 is a block diagram illustrating in detail the data controller of FIG. 1. Referring to FIG. 2, the data control unit 100 includes a power supply unit 110, a power management unit 120, a control unit 130, a sensing unit 140, and a central processing unit 150.

The power supply unit 110 converts an AC voltage into a DC voltage and supplies the same.

The power management unit 120 stores, supplies, and manages the DC voltage supplied from the power supply unit 110 and the DC voltage supplied from the renewable energy source 160. Preferably, the renewable energy source 160 may be composed of a solar module 162 or a wind turbine module 164.

The controller 130 controls the on / off of the street lamp operating by the DC current supplied from the power management unit 120.

The sensing unit 140 receives sensor data from a sensor (102 of FIG. 1) installed in a street lamp.

The central processing unit 150 controls the operation of the power management unit 120 and receives the sensor data received by the sensing unit 140 to perform an on / off operation command of the control unit 130. The street light is turned on / off in accordance with the operation of the control unit 130 by communicating with the control unit 130, the communication between the street light and the control unit 130 is preferably using the RS232 / 422/485 standard of the UART communication method. When the normal lighting is made, the controller 130 transmits a lighting message of the corresponding street lamp to the central processing unit 150, and in the case of a failure, distinguishes whether the street lamp is a failure or the controller 130 is broken and sends the corresponding message to the central processing unit ( 150).

The sensor 145 includes an illuminance sensor or a human body sensor, and acquires sensor data by sensing the brightness of the outside by the illuminance sensor and the movement of people by the human body sensor, and receives the sensor data through the sensing unit 140. The processor 150 transmits to the processing unit 150, and the central processing unit 150 commands an on / off operation of the controller according to the detected sensor data. The human body sensor may preferably be configured as an infrared sensor.

The sensor 145 further includes an earth leakage sensor for collecting current information, and the sensing unit 140 includes a filter / amplifier and an analog / digital converter, and the filter / amplifier receives current information collected by the earth leakage sensor. After converting to voltage information using a resistor, filtering, amplification, and digital conversion are performed to the central processing unit 150, and the central processing unit 150 checks whether there is a short circuit from the data processed by the sensing unit 140. You can judge. The filter / amplifier removes high frequency noise from the voltage information using a low pass filter, amplifies the output voltage through an amplification circuit, reduces the DC gain error generated through the amplification stage using a high pass filter, and maximizes the signal. Maximum peak detection can be performed to maintain the value.

In real circuits, errors occur due to the effects of resistance, sensors, and noise, and this process needs to be reduced. If the leakage measurement is Y = A x X (where Y is the leakage, X is the digital value of the leakage, and A is a constant), the error occurs at constant A and the slope of the linear function In order to measure the corresponding A, two points of data are required. If the leakage amount is 0, the slope is 0, and if you know only one point of data, the slope A can be known. When the central processing unit 150 inputs, the leakage amount y1 can be known, and when the digital conversion value x1 is used, the slope A = (y1-y0) / (x1-x0) is obtained. Here, since x0 and y0 are 0, y1 is an accurate leakage amount, and x1 is a digital conversion value of the leakage amount, the sensor value can be found using A obtained from the equation.

3 is a block diagram illustrating in detail the power management unit of FIG. 2. Referring to FIG. 3, the power management unit 120 includes a rectifier 122, a power monitoring unit 124, an energy storage unit 126, and a switching unit 128.

The rectifier 122 rectifies the DC voltage supplied from the renewable energy source 160. Maintain stable output of DC voltage 12V.

The power monitoring unit 124 monitors whether the DC voltage rectified by the rectifying unit 122 maintains a reference voltage. The power monitoring unit 124 measures not only a DC voltage but also a DC current and a temperature.

The energy storage device 126 stores the DC voltage supplied from the AC power and the renewable energy source 160 and manages the state of the stored voltage. The energy storage device 126 measures state information such as a DC voltage, a DC current, and a temperature, and stores the state information in a memory. The state information stored in the energy storage unit 126 is transmitted to the central processing unit 150. In addition, the energy storage unit 126 generates and transmits a status message to the central processing unit 150 according to the limits of the maximum and minimum values of the currently set voltage, charging current, discharge current and temperature based on the stored state information. This can also include the number of detections, automatic reset time settings, and historical data about the state in memory.

The switching unit 128 controls on / off of the power supply unit 110 according to the DC voltage monitored by the power monitoring unit 124. The power monitoring unit 124 measures the remaining capacity of the renewable energy to turn off the power supply unit 110 when the reference value is higher than or equal to the reference value, and when it is lower than the reference value, the switching unit 128 turns on the power supply unit 110. Let's do it. Renewable energy source 160 is not possible to obtain energy in the absence of the sun at night and wind power is also not possible on days without wind, so if the renewable energy source 160 does not generate energy, the power supply unit ( 110, the supply and storage of energy. As an embodiment of the present invention, the reference value for the on / off of the power supply 110 is preferably about 30% of the total charge amount.

In addition, when the remaining capacity is further lowered to be lower than the second reference value, the data controller alternates the connection with the renewable energy source 160 to supply only the DC voltage supplied by the power supply unit 110 to the street lamp. In addition, when the renewable energy source 160 operates due to the brighter day or the wind again, the remaining capacity may be higher than the second reference value again, so that the connection with the renewable energy source 160 may be started. The second reference value is preferably about 10%.

AC power input through the switching unit 128 can be given to the user can be set in units of% through the monitoring of the remaining capacity, and the load capacity, operating time, brightness adjustment, and the like should be considered.

As a preferred embodiment of the present invention, the data control unit 100 may further include a display unit 170 for displaying a light-on state, an error state, a short-circuit state, and an on / off state of the power supply unit 110 of the street light. have. It is possible to indicate whether the lighting of the street lamp is normally performed by using the LED, and the error state can be displayed by dividing the failure of the LED lighting device, the failure of the data control unit 100, the relay failure, etc. Depending on the magnitude of the current, it can be displayed with caution and warning.

Although the preferred embodiments of the present invention have been shown and described, the present invention is not limited to the specific embodiments described above, and the present invention is not limited to the specific embodiments of the present invention, and is generally used in the art to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Various modifications are possible by those skilled in the art. In addition, matters that can be easily inferred from the appended drawings should be regarded as included in the content of the present invention even if they are not described in the detailed description, and various modifications will be separately understood from the technical spirit or the prospect of the present invention. Will not be.

1 is a conceptual diagram showing a hybrid street light monitoring control system according to an embodiment of the present invention,

2 is a block diagram illustrating in detail the data controller of FIG. 1; and

3 is a block diagram illustrating in detail the power management unit of FIG. 2.

Claims (14)

A data control unit installed in the street light to supply power to the street light by duplexing with an AC voltage supplied by a power plant and a renewable energy source, and determining or controlling the state of the street light; A distribution box for supplying the AC voltage to the data controller; And And a control system connected to the distribution box for controlling and managing the operation of the data control unit. The method of claim 1, wherein the data control unit A power supply for converting and supplying the AC voltage to DC voltage; A power management unit for storing, supplying, and managing a DC voltage supplied from the power supply unit and a DC voltage supplied from the renewable energy source; A control unit controlling on / off of a street light operated by a DC current supplied from the power management unit; A sensing unit configured to receive sensor data from a sensor installed in the street light; And And a central processing unit controlling the operation of the power management unit and receiving the sensor data inputted by the sensing unit to perform an on / off operation command of the control unit. The method of claim 2, wherein the power management unit Rectifier for rectifying the DC voltage supplied from the renewable energy source; A power monitoring unit for monitoring whether the DC voltage rectified by the rectifying unit maintains a reference voltage; An energy storage device for storing the DC voltage supplied from the AC power and the renewable energy source and managing a state of the stored voltage; And And a switching unit controlling on / off of the power supply unit according to the DC voltage monitored by the power monitoring unit. The hybrid street light monitoring control system according to claim 3, wherein the renewable energy source is a solar module or a wind turbine module. The hybrid street light monitoring control system according to claim 1, wherein the street light is an LED. The system of claim 5, wherein the LED is capable of dimming control in which brightness is controlled by a relay or a triac. The method of claim 2, wherein the sensor comprises an illuminance sensor or a human body sensor, The brightness of the outside is detected by the illuminance sensor and the movement of people is detected by the human body detecting sensor to obtain the sensor data and transmit the sensor data to the central processing unit through the sensing unit, wherein the central processing unit is configured to sense the sensor data. Hybrid street light monitoring control system characterized in that for performing the on / off operation command of the control unit. The hybrid street light monitoring control system according to claim 7, wherein the human body sensor is an infrared sensor. According to claim 7, wherein the sensor further comprises a leakage sensor for collecting current information, The sensing unit includes a filter / amplifier and an analog / digital converter, and the filter / amplifier receives current information collected by the ground fault sensor, performs filtering, amplification, and digital conversion, and transmits the same to the central processing unit. The central processing unit is a hybrid street light supervisory control system, characterized in that for determining whether a short circuit from the data processed by the sensing unit. 10. The hybrid street light monitoring control system according to claim 9, wherein the filter / amplifier performs noise removal, voltage amplification, filtering, and maximum peak detection from the current information. The method of claim 3, wherein the power monitoring unit measures the remaining capacity of the renewable energy and transmits it to the energy storage device, the switching unit is the remaining capacity of the renewable energy received by the energy storage device stored in the memory The hybrid street light monitoring control system, characterized in that the power supply is turned off when the first reference value or more, and the power supply is turned on when the power supply is lowered below the first reference value. 12. The hybrid street light monitoring control system according to claim 11, wherein the DC power supplied by the power supply unit is supplied to the street light when the remaining capacity is lower than the second reference value lower than the first reference value. The method of claim 12, wherein when the remaining capacity is lowered below the second reference value, the data control unit alternates the connection with the renewable energy source and supplies only the DC voltage supplied by the power supply unit to the street lamp, The hybrid street light monitoring and control system, if the value is higher than the second reference value, starts connection with the renewable energy source again. 8. The hybrid street light monitoring and control system according to claim 7, further comprising a display unit for displaying a lighting state, an error state, an electric leakage state, and an on / off state of the power supply unit.

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