KR102163719B1 - Sunlight street lamp and method for operating thereof - Google Patents

Abstract

Disclosed are a solar street light and an operating method thereof. The solar street light comprises: a solar cell to generate power from a solar energy; a first measuring unit to measure a power generation amount from the generated power; a charging controller to output rechargeable power obtained by converting a voltage or a current of the generated power into a rechargeable voltage or a rechargeable current; a battery to charge the rechargeable power; a second measuring unit to measure charged power of the battery; an illuminating unit lighted up using the charged power of the battery; a third measuring unit to measure power consumption amount of the illuminating unit; a display unit to output the measured power generation amount, the charged power amount, and the power consumption amount; and a power controller to monitor the measured power generation amount, the charged power amount, and the power consumption amount, to control charge of the battery according to the monitoring result, and for controlling lighting of the illuminating unit to control discharge of the battery. The power controller controls the illuminating unit to be lighted up from a sunset time to a sunrise time, and to control the battery to be charged from the sunrise time to the sunset time. When the charged power amount is less than preset middle level, the power controller controls a lighting time of the illuminating unit and the lighting number of a plurality of LEDs included in the illuminating unit. When the charged power amount is a preset minimum value, the power controller controls the illuminating unit to be turned-off by force.

Description

TECHNICAL FIELD The solar street lamp and method for operating the same

The present invention relates to a solar street light and a method of operating the same.

In the solar power generation system, when sunlight is irradiated on a solar panel composed of a semiconductor, an electric current is generated by a photovoltaic phenomenon, and the generated electric power is charged so that it can be used in real life. These solar power generation systems are largely classified into grid-connected solar power generation systems and independent solar power generation systems.

Grid-connected photovoltaic power generation system refers to a system connected with grid power. If the photovoltaic power generation is less than the power consumed in the home, a shortage is supplied from the grid power and the photovoltaic power is the power consumed in the home. If it exceeds, the surplus power is supplied to the grid power side in reverse.

In addition, the stand-alone solar power generation system is not connected to the grid power source and is equipped with a battery, and when the photovoltaic power generation exceeds the power consumed at home, the surplus power is charged to the battery, and the photovoltaic power is assumed. If it is less than the power consumed by the battery, the charged power is supplied from the battery.

The conventional independent solar power generation system has the following problems.

Since the amount consumed by the load is not constant depending on the day, night, and time, and the battery is not charged in rainy weather, the capacity must be calculated according to the load of each household. Calculation of the capacity of the battery has many problems because various situations must be considered.

In addition, the battery has a problem in that the lifespan is short due to severe load fluctuations, and the reliability of the battery is low due to low charge and discharge efficiency. Furthermore, the battery is expensive, so it is expensive to replace it, and the cost is inferior.

Korean Patent Publication No. 1999-0058507 (1999.07.15)

The present invention provides a solar street light for controlling the lighting of the lighting by charging the electric power generated by the independent solar power generation into a battery and turning on the lighting with the charged electric power, and monitoring the electric power charged and discharged in the battery, and an operation method thereof. It is to do.

According to an aspect of the present invention, a solar street light is disclosed.

A solar street light according to an embodiment of the present invention includes a solar cell unit that generates power from solar energy, a first measurement unit that measures the amount of generated power from the generated power, and can charge the voltage or current of the generated power. A charging control unit that outputs chargeable power converted into voltage or chargeable current, a battery unit that charges the chargeable power, a second measurement unit that measures the amount of charging power of the battery unit, and is lit by using the charging power of the battery unit. The lighting unit, a third measuring unit that measures the amount of power consumption of the lighting unit, a display unit that outputs the measured amount of generated power, the amount of charging power, and the amount of power consumption, the measured amount of generated power, the amount of charging power, and the amount of power consumption are monitored, and the monitoring result And a power control unit configured to control charging of the battery unit according to the battery unit and control lighting of the lighting unit to control discharging of the battery unit, wherein the power control unit controls the lighting unit to be turned on from sunset time to sunrise time, and the Controls the battery unit to be charged from sunrise time to sunset time, and when the charging power amount is less than a preset intermediate level, adjusts the lighting time of the lighting unit, and adjusts the number of lighting of a plurality of LED bulbs included in the lighting unit , When the charging power amount is a preset minimum value, the lighting unit is controlled to be forcibly turned off.

The second measurement unit uses the maximum and minimum voltages of the battery unit set in advance for a preset room temperature, and the maximum and minimum voltages of the battery unit set in advance for a preset low temperature, from the measured voltage of the battery unit according to temperature. The charging power amount is calculated.

The power control unit controls the chargeable power output from the charging control unit to be supplied to the battery unit when the solar cell unit generates electricity and the amount of generated power is measured, and the measured amount of charging power is the maximum amount of charging power of the battery unit When abnormality occurs, the rechargeable power is blocked from being supplied to the battery unit in order to prevent overcharging of the battery unit.

The power control unit estimates the lighting possible time of the lighting unit according to the current charging power amount of the battery unit, using the charging power amount, the power consumption amount, and a preset basic discharge power amount, and the display unit outputs the estimated lighting possible time. To be controlled.

The lighting available time is calculated by dividing the charging power amount by the power consumption amount when the lighting unit is turned on and the power consumption amount is generated, and when the lighting unit is turned off and the power consumption amount does not occur, the charging power amount is the basic discharge It is calculated by dividing by the amount of electricity.

When the charging power amount is less than the intermediate level, the power control unit controls the lighting unit to be turned on only for a preset time from the time when the lighting unit is turned on, or so that the lighting unit is turned on from a preset delay time after sunset to a pre-set time before sunrise. Controls, and controls the display unit to output a display indicating the adjustment of the lighting time and caution in use.

The display unit includes two green indicators and one red indicator indicating the current charging power amount of the battery unit, wherein the power control unit is configured to light up the two green indicators when the charging power amount is higher than the intermediate level, and the When the charging power amount is less than the intermediate level, one green indicator light is turned on, and when the charging power amount is less than a preset lower level, the one red indicator light is controlled to be lit.

When the charging power amount is less than the lower level, the power control unit controls the display unit to output a display indicating a low-capacity warning and a light-off warning of the charging power amount.

According to another aspect of the present invention, a method of operating a solar street light including a solar cell unit, a battery unit, and a lighting unit is disclosed.

A method of operating a solar street light according to an embodiment of the present invention includes the steps of lighting the lighting unit from sunset time to sunrise time, charging the battery unit from sunrise time to sunset time, and power generation of the solar cell unit. Measuring and monitoring the amount of power, the amount of power charged to the battery unit, and the amount of power consumption of the lighting unit, when the amount of charging power is less than a preset intermediate level, adjusting the lighting time of the lighting unit, a plurality of LED bulbs included in the lighting unit And adjusting the number of lights of and when the charging power amount is a preset minimum value, forcibly turning off the lighting unit.

The solar street light and its operation method according to an embodiment of the present invention include charging the electric power generated by independent solar power generation into a battery, turning on the lighting with the charged electric power, and monitoring the electric power charged and discharged in the battery. By controlling the lighting, it is possible to extend the life of the expensive battery, improve the stability and reliability of the entire system, and reduce the cost.

1 is a view schematically illustrating the configuration of a solar street light according to an embodiment of the present invention.
2 is a view for explaining the configuration of a solar street light according to the embodiment of the present invention of FIG.
3 is a flowchart showing a method of operating a solar street light according to an embodiment of the present invention.

Singular expressions used in the present specification include plural expressions unless the context clearly indicates otherwise. In the present specification, terms such as “consisting of” or “comprising” should not be construed as necessarily including all of the various elements or various steps described in the specification, and some of the elements or some steps It may not be included, or it should be interpreted that it may further include additional elements or steps. In addition, terms such as "... unit" and "module" described in the specification mean units that process at least one function or operation, which may be implemented as hardware or software, or as a combination of hardware and software. .

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

1 is a view schematically illustrating a configuration of a solar street light according to an embodiment of the present invention, and FIG. 2 is a view for explaining the configuration of a solar street light according to an embodiment of the present invention of FIG. Hereinafter, a solar street light according to an embodiment of the present invention will be described with reference to FIG. 1, but reference will be made to FIG. 2.

1, a solar street light according to an embodiment of the present invention includes a solar cell unit 10, a first measurement unit 20, a charge control unit 30, a battery unit 40, and a second measurement unit 50. ), a lighting unit 60, a third measurement unit 70, a display unit 80, and a power control unit 90.

The solar cell unit 10 is a power generation device that generates electric power by converting solar energy into electric energy.

For example, the solar cell unit 10 may be configured to include a solar panel in which a plurality of solar cells are arranged.

The first measurement unit 20 measures an amount of generated power from the power generated by the solar cell unit 10. For example, the first measurement unit 20 may measure a voltage or current of power output from the solar cell unit 10 and calculate an amount of generated power from the measured voltage or current.

The charge control unit 30 outputs chargeable power obtained by converting the voltage or current of generated power supplied from the solar cell unit 10 into a chargeable voltage or chargeable current of the battery unit 40.

For example, the charge control unit 30 may be a solar charge controller, and the solar charge controller is capable of charging generation power in a PWM (Pulse Width Modulation) or MPPT (Maximum Power Point Tracking) method. Can be converted to

The battery unit 40 charges rechargeable power output from the charge control unit 30.

The second measuring unit 50 measures the amount of charging power of the electric power charged in the battery unit 40. For example, the second measurement unit 50 may measure the voltage of the battery unit 40 and estimate the amount of charging power of the battery unit 40 by using the measured voltage. That is, the second measurement unit 50 may calculate the amount of charging power of the battery unit 40 from the voltage measured by the battery unit 40 by using a preset function representing the relationship between the voltage and the remaining battery capacity. Here, the voltage and the remaining battery capacity may be proportional.

According to another embodiment, the second measurement unit 50 includes a maximum and minimum voltage of the battery unit 40 set in advance for a preset room temperature, and a maximum and minimum voltage of the battery unit 40 set in advance for a preset low temperature. Using the voltage, the state of charge of the battery unit 40 corresponding to the amount of charging power of the battery unit 40 may be calculated according to the case where the temperature is room temperature or low temperature. Here, the maximum voltage is the voltage of the battery unit 40 at which the charging power amount becomes 100%, and the minimum voltage is the voltage of the battery unit 40 at which the charging power amount becomes 0%. That is, the second measurement unit 50 calculates the ratio (%) of the measured voltage based on the preset maximum voltage and minimum voltage, so that the state of charge of the battery unit 40 corresponding to the amount of power charged by the battery unit 40 Can be calculated.

To this end, the solar street light according to the embodiment of the present invention may further include a temperature sensor unit (not shown) for measuring the temperature, and the maximum and minimum voltages for room temperature and low temperature according to the used battery are obtained from the user. Can be input.

For example, the room temperature can be set to 25 degrees Celsius, the low temperature is -15 degrees Celsius, the maximum and minimum voltages at room temperature are 13V and 12V, respectively, and the maximum and minimum voltages at low temperature can be set to 12.3V and 11.3V. .

The lighting unit 60 is turned on using charging power supplied from the battery unit 40.

The lighting unit 60 may be configured to include a plurality of LED bulbs. For example, the lighting unit 60 may be configured to include two green LED bulbs and one red LED bulb.

The third measurement unit 70 measures the amount of power consumption of the power consumed by the lighting unit 60 by supplying charging power to the lighting unit 60. For example, the third measurement unit 70 may measure the voltage or current of power supplied to the lighting unit 60 and calculate the amount of power consumption from the measured voltage or current.

The display unit 80 outputs information obtained or processed by the power control unit 90 to be described later. For example, the display unit 80 may be implemented as a liquid crystal display or the like. In addition, when the display unit 80 and a sensor for detecting a touch operation form a mutual layer structure (ie, a touch screen), the display unit 80 may be used as an input device in addition to an output device.

In addition, the display unit 80 includes a plurality of indicators indicating the current amount of charging power of the battery unit 40.

For example, the display unit 80 may include two green indicators and one red indicator. So, when the amount of charging power is above the intermediate level, two green indicators light up, when the amount of charging power is less than the intermediate level, one green indicator lights up, and when the amount of charging power is less than the preset lower level, one red indicator lights up. Can be.

The power control unit 90 monitors the amount of generated power, the amount of charging power, and the amount of power consumption measured by the first measurement unit 20, the second measurement unit 50, and the third measurement unit 70, and The charging of the part 40 is controlled, and the lighting of the lighting part 60 is controlled to control the discharge of the battery part 40.

First, the power control unit 90 controls charging and discharging of the battery unit 40 according to a basic setting. In this case, the power control unit 90 may control the display unit 80 to output the amount of generated power, the amount of charging power, and the amount of power consumption measured in real time in real time.

For example, the power control unit 90 basically controls the lighting unit 60 to be turned on from the sunset time to the sunrise time, and the battery unit 40 to be charged for the rest of the time, that is, the sunrise time to the sunset time. have. In this case, the sunset time and the sunrise time may be applied to the monthly representative sunrise time and the monthly representative sunset time measured in advance, as shown in FIG. 2.

In addition, the power control unit 90 controls the chargeable power output from the charging control unit 30 to be supplied to the battery unit 40 when the solar cell unit 10 generates power and the amount of generated power is measured, and the measured amount of charging power When the maximum amount of charging power of the battery unit 40 is greater than or equal to the maximum charge amount of the battery unit 40, charging of the battery unit 40 can be controlled by blocking the supply of chargeable power to the battery unit 40 in order to prevent overcharging of the battery unit 40. I can.

In addition, the power control unit 90 estimates the lighting available time of the lighting unit 60 according to the current charging power amount of the battery unit 40 by using the measured amount of charging power, consumption power, and preset basic discharge power amount. In this case, the power control unit 90 may control the display unit 80 to output the estimated lighting possible time of the lighting unit 60.

That is, when the lighting unit 60 is turned on and the amount of power consumption is generated, the power control unit 90 may calculate the lighting available time by dividing the amount of charging power measured in real time by the amount of power consumption measured in real time.

In addition, when the lighting unit 60 is turned off and the amount of power consumption is not generated, the power control unit 90 may calculate a lighting available time by dividing the amount of charging power measured in real time by a preset basic discharge power amount.

For example, assuming that the maximum charging current of the battery unit 40 is 135Ah and the maximum charging voltage of the battery unit 40 is 12V, the maximum charging power amount of the battery unit 40 may be 135Ah*12V=1620Wh. have. In addition, when 1620Wh, which is the maximum charging power amount, is divided by the currently measured power consumption amount, the available operation time may be calculated. In addition, when there is no power consumption and the amount of power consumption is not measured, the operation available time may be calculated by dividing the maximum charging power amount of 1620 Wh by the preset basic discharge power amount. Here, assuming that the basic discharge power amount is 60W, the maximum operable time may be calculated as 1620Wh/60W=27.

Meanwhile, the power control unit 90 may calculate a charging completion time by using an increase rate of the charging power amount of the battery unit 40 over time, and control the display unit 80 to output the calculated charging completion time. .

In addition, the power control unit 90 determines whether the amount of charging power measured through monitoring is less than a preset intermediate level, and when the amount of charging power is less than the intermediate level, adjusts the lighting time of the lighting unit 60. For example, the intermediate level may be set to 60% of the maximum charging power amount, and may be set in the range of 30% to 80%. In this case, the power control unit 90 may control the display unit 80 to output a display indicating the adjustment of the lighting time and caution in use.

That is, when the charging power amount is less than the intermediate level, the power control unit 90 controls the lighting unit 60 to be lit only for a preset time from the light-on time, or from a preset delay time after sunset to a preset time before sunrise. The lighting unit 60 can be controlled to be turned on.

For example, the power control unit 90 may control the lighting unit 60 to be turned on from 2 hours, 4 hours, 6 hours, or 8 hours after sunset to sunrise time when the amount of charging power is less than the intermediate level. Alternatively, the power control unit 90 may control the lighting unit 60 to be turned on from 2 hours, 4 hours, or 6 hours after sunset to 1 hour or 2 hours before sunrise when the amount of charging power is less than the intermediate level.

In this case, the power control unit 90 may control lighting of a plurality of indicators included in the display unit 80 to indicate the current amount of charged power of the battery unit 40.

For example, assuming that the display unit 80 includes two green indicators and one red indicator, the power control unit 90 lights up two green indicators when the amount of charging power is above the intermediate level, When the charging power amount is less than the middle level, one green indicator light is turned on, and when the charging power amount is less than the preset lower level, one red indicator light may be controlled. Here, the lower level may be set to 20% of the maximum charging power amount, and may be set in the range of 10% to 30%.

The power control unit 90 may control the display unit 80 to output a display indicating a low-capacity warning and a light-off warning of the charging power amount when the charging power amount is less than a preset lower level.

In addition, the power control unit 90 determines whether the amount of charging power measured through monitoring is a preset minimum value, and when the amount of charging power is the minimum value, controls the lighting unit 60 to be forcibly turned off. For example, the minimum value may be set to 10% of the maximum charging power amount.

3 is a flowchart illustrating a method of operating a solar street light according to an embodiment of the present invention.

In step S210, the solar street light operates according to a default setting to charge and discharge the battery unit.

For example, a solar street light basically turns on the lighting unit 60 from sunset time to sunrise time, and may perform charging of the battery unit 40 for the rest of the time, that is, from sunrise time to sunset time.

In step S220, the solar street light monitors the measured amount of generated power, charged power, and consumed power.

At this time, the solar street light estimates the lighting possible time of the lighting unit 60 by using the measured amount of charging power, consumption power, and preset basic discharge power amount.

That is, when the amount of power consumption is generated when the lighting unit 60 is turned on, the solar street light may calculate an operable time by dividing the amount of charging power measured in real time by the amount of power consumption measured in real time. In addition, when the amount of power consumption is not generated because the lighting unit 60 is turned off, the solar street light may calculate an operable time by dividing the amount of charging power measured in real time by a preset amount of basic discharge power.

In step S230, the solar street light determines whether the measured charging power amount is less than a preset intermediate level.

In step S240, the solar street light adjusts the lighting time of the lighting unit 60 when the amount of charging power is less than the intermediate level.

That is, when the amount of power charged by the solar street light is less than the intermediate level, the lighting unit 60 is turned on only for a preset time from the time it is turned on, or from a preset delay time after sunset to a preset time before sunrise. ) Can be turned on.

In this case, the solar street light may adjust the number of lighting of the plurality of LED bulbs included in the lighting unit 60.

For example, assuming that the lighting unit 60 is composed of two green LED bulbs and one red LED bulb, the solar street light turns on two green LED bulbs when the amount of charging power is above the intermediate level, and the amount of charging power is If it is less than the middle level, one green LED bulb can be turned on, and when the charging power is less than a preset lower level, one red LED bulb can be turned on.

In step S250, the solar street light determines whether the measured charging power amount is a preset minimum value.

In step S260, when the amount of power charged by the solar street light is the minimum, the lighting unit 60 is forcibly turned off.

Meanwhile, the constituent elements of the above-described embodiment can be easily grasped from a process point of view. That is, each component can be identified as a respective process. In addition, the process of the above-described embodiment can be easily grasped from the viewpoint of the components of the device.

In addition, the above-described technical contents may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like alone or in combination. The program instructions recorded on the medium may be specially designed and configured for the embodiments, or may be known and usable to those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. -A hardware device specially configured to store and execute program instructions such as magneto-optical media, and ROM, RAM, flash memory, and the like. Examples of the program instructions include not only machine language codes such as those produced by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like. The hardware device may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

The above-described embodiments of the present invention have been disclosed for the purpose of illustration, and those skilled in the art who have ordinary knowledge of the present invention will be able to make various modifications, changes, and additions within the spirit and scope of the present invention, and such modifications, changes and additions It should be seen as belonging to the following claims.

10: solar cell unit
20: first measuring unit
30: charging control unit
40: battery part
50:, the second measuring unit
60: lighting unit
70: third measuring unit
80: display unit
90: power control unit

Claims (9)

In the solar street light,
A solar cell unit that generates electric power from solar energy;
A first measuring unit that measures the amount of power generated from the generated power in real time;
A charge control unit for outputting chargeable power obtained by converting the voltage or current of the generated electric power into chargeable voltage or chargeable current;
A battery unit for charging the rechargeable power;
A second measuring unit that measures the amount of charging power of the battery unit in real time;
A lighting unit that is lit using the charging power of the battery unit;
A third measuring unit that measures the amount of power consumption of the lighting unit in real time;
A display unit outputting the measured amount of power generation, amount of charging power, and amount of power consumption;
And a power controller configured to monitor the measured amount of generated power, charge amount, and power consumption, control charging of the battery unit according to the monitoring result, and control lighting of the lighting unit to control discharging of the battery unit,
The power control unit,
The battery measured in real time by the second measurement unit using the amount of charging power measured in real time by the second measurement unit, the power consumption amount measured in real time by the third measurement unit, and a preset basic discharge power amount Calculate the available time for lighting based on when the lighting unit is turned on according to the amount of negative real-time charging power and the available time for operation based on when the lighting unit is turned off, and when the lighting unit is turned on depending on whether the lighting unit is turned on or not The calculated lighting possible time is controlled to be output to the display unit in real time, and when the lighting unit is turned off, the operation possible time is controlled to be output to the display unit in real time,
When the lighting unit is turned on and the amount of power consumption occurs, the amount of power consumption measured in real time by the second measurement unit is divided by the amount of power consumption measured in real time by the third measurement unit to calculate the available lighting time, and the lighting unit When is turned off and the amount of power consumption measured in real time by the third measuring unit does not occur, the amount of charging power measured in real time by the second measuring unit is divided by the basic discharge power amount to calculate the operable time,
Controlling the lighting unit to be turned on from sunset time to sunrise time, and controlling the battery unit to be charged from the sunrise time to the sunset time,
When the charging power level is less than the preset intermediate level, the lighting time is controlled to light only for a preset time from the time when the lighting unit is lit, or to light up from a preset delay time after sunset to a preset time before sunrise. To adjust the number of lights of the plurality of LED bulbs included in the lighting unit,
When the charging power amount is a preset minimum value, the lighting unit is controlled to be forcibly turned off,
The second measuring unit,
Based on the maximum and minimum voltages of the battery unit at a preset room temperature and the maximum and minimum voltages of the battery unit at a preset low temperature, the measured voltage of the battery unit is at a temperature of the room temperature or the low temperature. Or calculating a state of charge as a ratio (%) of the measured voltage to the maximum voltage and the minimum voltage of the battery unit at the low temperature,
The maximum voltage is a voltage of the battery unit at which the state of charge becomes 100%,
The minimum voltage is a solar street light, characterized in that the voltage of the battery unit in the state of charge is 0%.
delete The method of claim 1,
The power control unit,
When the solar cell unit generates power and the amount of generated power is measured, the chargeable power output from the charge control unit is controlled to be supplied to the battery unit,
When the measured amount of charging power exceeds the maximum amount of charging power of the battery unit, the rechargeable power is blocked from being supplied to the battery unit to prevent overcharging of the battery unit.
delete delete delete The method of claim 1,
The display unit includes two green indicators and one red indicator indicating the current amount of charging power of the battery unit,
The power control unit,
When the charging power amount is above the intermediate level, the two green indicators light up,
When the charging power amount is less than the intermediate level, one green indicator lights up,
When the charging power amount is less than a preset lower level, the solar street light, characterized in that controlling so that the one red indicator light.
The method of claim 7,
And the power control unit controls the display unit to output a display indicating a low-capacity warning and a light-off warning of the charging power amount when the charging power amount is less than the lower level.
delete

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