KR101053187B1 - A solar position-tracking system - Google Patents

Abstract

PURPOSE: A solar position tracking system is provided to check the state of the sun with minimum facilities and management expense by including a determining unit for the floating status of the sun to check the floating status of the sun only at a constant time interval. CONSTITUTION: A pan/tilting drive unit(20) drives a solar panel(10) to be circulated to a top and a bottom direction by tilting and to a horizontal direction by panning. A GPS receiver(30) obtains the installation position information of the solar panel. An electron compass(40) is arranged in the solar panel and measures the position and the altitude of the solar panel. A solar position measuring unit(50) measures the actual position and the actual altitude of the sun. A controlling unit(70) calculates the position and the altitude of the sun based on the position information of the solar panel, which is obtained from the GPS receiver using an ephemeris. The calculated position and altitude of the sun are applied to control the pan/tilting drive unit. The controlling unit dives and controls the position and the angle of pan/tilting drive unit by comparing the data, calculated by the ephemeris, with measured values in the solar position measuring unit.

Description

Solar position tracking system {A SOLAR POSITION-TRACKING SYSTEM}

The present invention relates to a solar position tracking system, and more particularly, to a solar position tracking system that can accurately track the solar position to increase the photovoltaic power generation efficiency.

As society develops and modernizes, development of alternative energy is becoming active due to high oil prices and depletion of fossil energy, which are caused by an increase in the use of fossil energy, which was an existing energy source.

Among the alternative energy, great attention is focused on the field of solar energy which can be used without pollution. In particular, since photovoltaic power generation is a semiconductor element and a control part is an electronic component, there is no mechanical vibration or noise, and a solar cell has a life span of several decades or more, and a semi-automated or automated power generation system is possible. There is an advantage that can minimize the cost. In addition, photovoltaic power generation has the advantage that it can be installed and used at home because it can be a small-scale power generation without the need for large-scale power generation equipment.

On the other hand, since the sun moves along the orbit from sunrise to sunset, when the solar light unit is fixed at a predetermined position for a long time, it cannot receive sunlight under optimal conditions. It lowers the efficiency.

Therefore, it is known that when the solar cell panel that receives sunlight is tracked along the trajectory of the sun, the solar light may be received under optimum conditions for a long time to increase the efficiency of the system. For this reason, a solar position tracking device has been developed and proposed.

However, since the solar position tracking value is different according to the position, place, and time of installing the solar panel, it is difficult to track the solar position in consideration of these variables, and actually obtains the solar position value and uses the pan / tilting driving device. Therefore, even if the attitude and position of the solar panel is adjusted, there is a problem that precise tracking is difficult due to mechanical errors or failures.

In addition, the solar power generation is a photovoltaic power generation while tracking the position of the sun only at the time when the sun is floating, and whether the sun is constantly floating because the time the sun is floating depends on the location, terrain, weather, and date. Should be monitored and measured.

However, there is a problem in that the maintenance cost increases accordingly because the location of the sun must be checked and tracked by continuously operating the photovoltaic facility (system) regardless of the time the sun is floating.

The present invention was conceived in view of the above points, even if the sun is not visible to determine whether the sun is floating separately to determine whether to drive the photovoltaic power generation facilities, whether the normal tracking of the solar position is made The purpose is to provide an improved solar location tracking system that can accurately track the location of the sun and reduce maintenance costs.

The solar position tracking system of the present invention for achieving the above object, the pan / tilt drive unit for tilting and panning driving the solar panel; A GPS receiver for obtaining installation position information of the solar panel; An electronic compass installed on the solar panel to measure azimuth and elevation angles of the solar panel; A sun position measuring unit measuring an actual azimuth and elevation angle of the sun; Calculate the solar position azimuth and altitude based on the position information of the solar panel obtained by the GPS receiver using astronomical force, and control the pan / tilting drive unit by applying the calculated solar position azimuth and altitude value. And a control unit for controlling driving by correcting the azimuth and altitude values of the pan / tilt driving unit by comparing the measured value measured by the solar position measuring unit with the data calculated using the astronomical force. .

Here, the solar position measuring unit preferably includes a CCD sensor for photographing the sun to obtain the sun position azimuth and altitude value.

In addition, the solar panel checks whether the sun is floating in the installed position, and further comprising a sun state determination unit for checking the position of the sun, the control unit is the sun state determination unit It is preferable to drive control the solar panel to follow the position of the sun by driving control of the pan / tilt driving unit based on the determination information whether the sun transmitted from the floating state.

In addition, the sun floating state determination unit, the rotating member having a shape in which the outer diameter gradually extends from the top to the bottom; An illuminance sensor installed at an outer inclined portion of the rotating member; A rotary drive unit for precisely rotating the rotary member; And a driving control unit which rotates the rotating member by driving control of the rotating driving unit at a set time interval, wherein the driving control unit includes rotation angle position information that detects illuminance of the reference value or more by the illuminance sensor when the rotating member is rotated; In addition, it is preferable to transmit the information detected by the illuminance sensor more than the reference value to the control unit.

In addition, the rotating member has a sensor mounting portion formed to be pulled from the outer surface with the same width from the upper end to the lower end, the illumination sensor is preferably installed on the bottom surface of the sensor mounting portion.

The driving control unit may fine-tune the rotary driving unit so that the rotating member is rotated by one rotation at predetermined time intervals, and the sun determination unit detects the rotation angle of the rotary driving unit precisely to detect the detected value. It is preferable to further include an encoder for transmitting to the drive control unit.

As a result, the drive controller may be precisely controlled to precisely drive the rotating member at a low speed so as to determine an accurate azimuth angle with respect to the sun position.

According to the solar position tracking system of the present invention, by determining whether the sun is floating state to check the sun floating state only at a certain time interval, the sun floating state to be confirmed through the minimum equipment and management cost It becomes possible.

In addition, by determining whether the fan / tilt drive and the correction drive for the solar panel are selectively driven based on the information of the state of the sun that is checked at regular intervals, the maintenance cost according to unnecessary driving can be reduced. There is an advantage.

In addition, it is possible to more accurately correct and control the pan / tilt drive of the solar panel through the actual position information of the sun obtained from the sun position measuring unit and the sun determination unit, thereby maximizing the solar power generation efficiency. It can be improved.

1 is a schematic configuration diagram showing a solar position tracking system according to an embodiment of the present invention.
FIG. 2 is a schematic diagram for explaining a state determination unit of the sun shown in FIG.
3 is a flowchart illustrating a sun position tracking method using a sun position tracking system according to an embodiment of the present invention.

Hereinafter, a solar position tracking system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2, a solar position tracking system according to an embodiment of the present invention includes a pan / tilt driving unit 20 and a GPS receiver 30 for tilting and panning the solar panel 10. ), An electronic compass 40, a sun position measuring unit 50, a sun floating state determination unit 60, and a control unit 70.

The solar panel 10 is panned in the horizontal direction by the pan / tilting driving unit 20 and supported to be tilted up and down, and the solar position is driven by the driving of the pan / tilting driving unit 20. It will be able to receive solar power while following the solar power generation.

The pan / tilting driving unit 20 is divided into a panning driver that is panned and a tilting driver that is tilted and driven according to a control signal of the control unit 70 while supporting the solar panel 10. The drive control is performed so that the 10 can follow the sun 100. That is, the pan / tilting driving unit 20 tracks the position according to the azimuth angle of the sun position by driving the solar panel 10 using the panning driver and controls the tilting driver to the altitude value of the sun position. Can be tracked accordingly.

Here, since the solar panel 10 and the pan / tilting driving unit 20 can be easily understood by those skilled in the art from a known technology, a detailed description thereof will be omitted.

The GPS receiver 30 transmits information on the installation position of the solar cell panel 10 to the control unit 70.

The electronic compass 40 is installed on the solar panel 10 to measure the azimuth and altitude angles of the solar panel 10. Thus, the current position and attitude of the solar panel 10 in the actual panning and tilting directions can be checked, and the data measured by the electronic compass 40 is provided to the control unit 70.

The sun position measuring unit 50 is to obtain the azimuth and the altitude angle by measuring the position of the sun 100 directly, preferably photographing the sun 100, based on the sun position on the photographed image frame And a CCD sensor that obtains solar position data. That is, the CCD sensor photographs the sun 100 at the installation position and obtains the coordinate values of the sun in the captured image frame, so that the azimuth and altitude value of the actual sun is based on the photographing angle and the photographing direction of the CCD sensor. You will get

As such, the solar position measurement value measured by the solar position measuring unit 50 is transmitted to the control unit 70, so that the control unit 70 calculates the sun using the astronomical force according to the coordinate value obtained from the GPS receiver 30. By comparing the position calculated value with the measured solar position measured value, the calculated value can be corrected. The control unit 70 precisely controls the pan / tilting driving unit 20 according to the corrected solar position value so that the solar panel 10 can accurately track the sun 100.

The sun state determination unit 60 is to check whether the sun is floating in the place where the solar panel 10 is installed, and to check the position of the sun. Referring to FIG. 2, the sun determination unit 60 includes a truncated cone-shaped rotating member 61, an illuminance sensor 62, a rotation driving unit 63, a drive control unit 64, and an encoder. 65 is provided.

The rotating member 61 has a truncated cone shape and is drawn in from the inclined outer circumferential surface 61a, and has a sensor mounting groove 61b formed at the same width from the top to the bottom. That is, the sensor mounting groove 61b is formed to be drawn in the same depth as the upper and lower constant width. The rotating member 61 of such a configuration can be rotated 360 degrees by the rotation driving unit 63. Here, the truncated cone shape refers to a shape in which the outer member gradually extends from the upper end to the lower end as shown in FIG. 2.

The illuminance sensor 62 is installed at the bottom of the sensor mounting groove 61b of the rotating member 61. The illuminance sensor 62 may be installed at least one. The illuminance sensor 62, when the rotation member 61 is rotated, when the bottom of the sensor mounting groove 61b comes to a point directly exposed to sunlight, it is confirmed that the sun is floating time by detecting more than the reference value of sunlight. Of course, you can see the azimuth of the sun. That is, when the rotation member 61 is finely adjusted from the initial position and rotated 360 degrees, when the spot where the illuminance value is detected is more than the reference value is found, the sun position, that is, the azimuth angle of the sun, is determined through the azimuth angle at the detected point. It becomes possible.

The information sensed by the illuminance sensor 62 is transmitted to the driving controller 64, and the driving controller 64 determines whether the sun is floating, and the sun position value (azimuth angle) when the sun is floating. And together with the information about whether the sun is time to deliver to the control unit (70).

Here, the sensor mounting groove 61b is formed to be drawn in a predetermined depth from the outer surface 61a of the rotating member 61, and formed to have a constant width so as to be positioned at the same azimuth line from the top to the bottom thereof, thereby providing the sensor mounting groove 61b. The illuminance sensor 62 is able to detect the illuminance more than the reference value when it comes to the point exactly coinciding with the sun 100, and when the sensor mounting groove 61b and the sun do not exactly match, the sensor mounting groove 61b. Shadows are generated at the bottom of the surface, so the illuminance above the reference value cannot be detected even when the sun is floating. Therefore, by adjusting and rotating the rotating member 61 to a point (azimuth angle) where the illumination sensor 62 installed at the bottom of the sensor mounting groove 61b detects the illumination of the reference value or more, the correct azimuth angle of the sun 100 can be confirmed. Yes, of course, you can see the sun is floating.

Here, when the sun is not floating, even if the rotation member 61 is rotated more than one rotation, the illuminance sensor 62 can not detect the illuminance more than the reference value, it is determined that the sun is not floating. It becomes possible.

Thus, by checking the sun floating state by the operation of driving the rotating member 61 one rotation, it is possible to accurately check the sun position (azimuth angle) in the case of the sun floating time.

The rotary drive unit 63 is for rotating the rotary member 61, it may include a precisely adjustable spindle motor. The rotation driving unit 63 is drive controlled by the drive control unit 64, and is rotated at a predetermined time interval. For example, the driving controller 64 drives the rotation driving unit 63 so that the rotating member 61 can be rotated once every 10 minutes, 20 minutes or 30 minutes. Therefore, it is not necessary to continuously monitor whether the sun is floating for 24 hours, and there is no need to continuously drive the pan / tilting driving unit 20 and the solar position measuring unit 50, thereby maintaining maintenance costs. Can be reduced.

In addition, the encoder 65 precisely detects the rotation angle by the rotation driving unit 64, and transmits the detected information to the driving control unit 64, thereby the rotation angle of the rotation driving unit 64 in the drive control unit 64 While controlling precisely, the rotation angle allows the azimuth angle of the sun to be accurately obtained.

The control unit 70 calculates the azimuth and altitude of the sun using astronomical force on the basis of the installation position information obtained from the GPS receiver 30. The solar panel 10 is driven and controlled to follow the sun by driving and controlling the pan / tilting driving unit 20 by applying the calculated solar position azimuth and altitude value, and the solar panel obtained by the electronic compass 40. The initial position value of the azimuth angle and the altitude value of (10) is checked, and the calculated value is applied from the identified initial value to drive control the pan / tilting drive unit 20.

In addition, the control unit 70 compares the actual solar position measurement value measured by the solar position measuring unit 50 and the calculated value calculated using the astronomical force, and based on the measured value pan / tilting drive unit 20 Drive control by correcting azimuth and altitude value of.

On the other hand, the control unit 70 is the drive control for the pan / tilting drive unit 20 as described above is made only when it is confirmed that the sun is floating in the sun state determination unit 60, Until then, only the calculated values of the astronomical force and the azimuth and altitude measurement values of the solar panel 10 by the electronic compass 40 are maintained.

That is, in the state where the sun is not floating, the control unit 70 stops driving the pan / tilting driving unit 20 and the solar position measuring unit 50, and maintains the off state while the sun is floating. Only if it is confirmed that the driving control of the pan / tilt drive unit 20 and the solar position measuring unit 50.

Hereinafter, a sun position tracking method using a sun position tracking system according to an embodiment of the present invention having the above configuration will be described in detail with reference to FIGS. 1 to 3.

First, the control unit 70 obtains a coordinate value for the position where the solar panel 10 is installed from the GPS receiver 30, and also the current azimuth and altitude value of the solar panel 10 from the electronic compass 40. Obtain (S10).

Subsequently, the control unit 70 calculates and obtains the azimuth angle and the altitude value of the sun position using the astronomical force on the basis of the coordinate value obtained from the GPS receiver 30 (S11).

The driving controller 64 of the sun determination unit 60 checks whether a predetermined time has elapsed (S12), and after the setting time has elapsed, as described above with reference to FIG. By driving (63) by rotating the rotating member 61 one time, it is checked whether the illuminance sensor 62 detects illuminance above the reference value (S13). That is, when the position at which the illuminance sensor 62 detects illuminance of a predetermined reference value or more is confirmed in the step S13, the detection information and the detection position (azimuth angle) information are transmitted to the control unit 70 so that the sun is floating. The state is confirmed.

When it is confirmed that the sun is floating as described above, and the azimuth angle of the sun is confirmed, the control unit 70 first drives the pan / tilting driving unit 20 according to the sun position azimuth angle and the altitude value calculated using the astronomical force. By controlling the altitude value and the azimuth angle of the solar cell panel 10 (S14). At this time, the initial value of the solar panel 10, that is, the initial azimuth and altitude value is obtained from the electronic compass 40, the attitude and position of the solar panel 10 is adjusted to the azimuth and altitude value calculated from the initial value. The control unit 70 controls the drive of the pan / tilting drive unit 20 to be able to.

Meanwhile, after driving control of the pan / tilting driving unit 20 based on the calculated value as in step S14, the sun position measuring unit 50 photographs the sun to obtain the sun position value (S15). .

Then, the control unit 70 compares the calculated values of the solar position calculated using the astronomical force and the measured solar position measured by the solar position measuring unit 50 (S16).

If there is a difference between the calculated value and the measured value in the step S16, the control unit 70 is a fan / so that the solar panel 10 can accurately track the sun according to the difference, that is, the solar position measurement value The tilting drive unit 20 controls the drive correction.

Accordingly, the control unit 70 can accurately control the sun position by accurately tracking the solar position, and thus, the solar power generation efficiency of the solar panel 10 can be improved to the maximum.

In addition, the control unit 70 is confirmed that the sun is floating state, by receiving the azimuth information of the sun from the sun state determination unit 60, utilizing the received azimuth information of the solar cell The solar cell panel 10 can be more accurately panned by controlling the panning operation of the panel 10 in order to obtain a correction value compared to the calculated value.

In addition, the control unit 70 drives the pan / tilting driving unit 20 and the solar position measuring unit 50 only when it is confirmed that the sun is in the floating state determination unit 60. By controlling the power supply and maintaining the off state, the power consumption and the control power according to unnecessary driving can be saved, thereby reducing the maintenance cost.

In addition, whether the sun is floating state determination unit 60 also continuously detects whether the sun is floating state, it operates only at a predetermined time, and the presence of the sun and the sun position through the minimum driving energy and driving time ( Azimuth) information can be obtained. Therefore, it is possible to at least reduce the maintenance cost required to check whether the sun is floating, and to measure the sun floating state even with one illuminance sensor 62, thereby reducing the cost. You can get it.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Rather, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims.

10. Solar panel 20. Pan / tilting drive unit
30. GPS receiver 40. Electronic compass
50 .. Sun position measuring unit 60. Sun state determination unit
70. Control unit 100. Solar

Claims (6)

A pan / tilting driving unit for tilting the solar panel to rotate in the vertical direction and panning to rotate the solar panel in the horizontal direction;
A GPS receiver for obtaining installation position information of the solar panel;
An electronic compass installed on the solar panel to measure azimuth and elevation angles of the solar panel;
A sun position measuring unit measuring an actual azimuth and elevation angle of the sun;
Calculate the solar position azimuth and altitude based on the position information of the solar panel obtained by the GPS receiver using astronomical force, and control the pan / tilting drive unit by applying the calculated solar position azimuth and altitude value. And a control unit for controlling driving by correcting the azimuth and altitude values of the pan / tilting driving unit by comparing the measured value measured by the solar position measuring unit with the data calculated using the astronomical force.
Check whether the sun is floating state in the place where the solar panel is installed, and further comprising a determination whether the sun floating state to check the sun position,
The control unit drives and controls the solar panel to follow the position of the sun by driving control of the pan / tilting driving unit based on the information indicating whether the sun is floating from the sun state determination unit. ,
The state of the sun floating determination unit,
A rotating member having a shape in which its outer diameter gradually expands from an upper end to a lower end;
An illuminance sensor installed at an outer inclined portion of the rotating member;
A rotary drive unit for precisely rotating the rotary member; And
And a driving control unit for rotating the rotating member by controlling the rotation driving unit at a predetermined time interval.
The driving control unit transmits the rotation angle position information of detecting the illuminance above the reference value by the illuminance sensor and the information detecting the illuminance above the reference value by the illuminance sensor to the control unit when the rotating member is rotated. Tracking system. According to claim 1, The solar position measuring unit,
Sun position tracking system comprising a CCD sensor for photographing the sun to obtain the sun position azimuth and altitude value. delete delete The method of claim 1, wherein the rotating member,
Solar position tracking system having a sensor mounting portion formed to be drawn from the outer surface from the upper end to the same width from the upper end, the illumination sensor is installed on the bottom surface of the sensor mounting portion. The method of claim 1, wherein the drive control unit,
Finely adjusting the rotary drive unit to rotate the rotary member one rotation at a predetermined time interval,
The solar position tracking system further comprises an encoder for accurately detecting the rotation angle of the rotation driving unit and transmitting the detection value to the drive control unit.

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