WO2012008659A1

WO2012008659A1 - Solar tracking device and solar tracking method using same

Info

Publication number: WO2012008659A1
Application number: PCT/KR2010/008424
Authority: WO
Inventors: 박종식; 양시창
Original assignee: (주)씨엘에프하이텍
Priority date: 2010-07-14
Filing date: 2010-11-26
Publication date: 2012-01-19
Also published as: KR20120007374A

Abstract

A solar tracking device and a solar tracking method using same are introduced. The solar tracking device is prepared for a solar power module to accurately condense light, and includes a horn-shaped sensing panel (160), a thermocouple (180) at the sensing panel, and a multi-section photodiode (200) below the sensing panel to allow a condensing light-type solar power module (10) to track the sun fast and accurately.

Description

Sun tracking device and sun tracking method using the same

The present invention relates to a solar tracking device and a solar tracking method using the same so that the focus of the solar light is accurately formed in the concentrated solar power module.

Recently, photovoltaic power generation has attracted attention in terms of prevention of environmental pollution and efficient energy production. Photovoltaic power generation is a technology that directly converts sunlight into electrical energy, unlike conventional solar power generation, and refers to a power generation method using a solar cell that generates electricity by photoelectric effect when sunlight is received. Such photovoltaic power generation systems are generally composed of modules consisting of solar cells, storage batteries, and power converters. A solar cell is a photovoltaic cell manufactured for converting solar energy into electrical energy. When a solar cell is irradiated with light on a contact surface of a metal and a semiconductor or a pn junction of a semiconductor, photovoltaic power is generated by photoelectric effect.

The solar cell is a semiconductor represented by silicon and developed naturally by the development of semiconductor technology and semiconductor characteristics. The solar cell has a structure in which N (negative) type semiconductor and P (positive) type semiconductor which have different electrical properties are bonded together. The two semiconductor boundary portions are called PN junctions. When sunlight hits the solar cell, the sunlight is absorbed into the solar cell, and the energy of the absorbed solar light causes the electricity of holes (+) and electrons (-) in the semiconductor. Particles (holes and electrons) are generated and move freely in the solar cell, but electrons (-) are collected toward the N-type semiconductor, and holes (+) are collected toward the P-type semiconductor, thereby generating potentials. When a load such as a light bulb or a motor is connected to an electrode made on the electrode, current flows. This is the principle of photovoltaic power generation by PN junction of a solar cell. Photovoltaic power generation can be said to be a large-scale power generation system using the principle of such a solar cell.

The photovoltaic device has high power generation efficiency when the solar light irradiated to the semiconductor is well focused, and the technology of tracking the position of the sun and precisely controlling the focus of the solar light in the photovoltaic power generation determines the efficiency of power generation. . Conventionally, photodiodes have been used for sun tracking of such photovoltaic modules. Photodiode is a kind of semiconductor diode, also called photodiode, and converts light energy into electric energy. Photodiodes are a type of optical sensor that converts light energy into electrical energy, which adds photodetection to the PN junctions of semiconductors. When light hits a diode, electrons and positive charge holes are created, causing current to flow, and the magnitude of the voltage is almost proportional to the intensity of the light. The phenomenon in which the voltage appears at the junction of the semiconductor as a result of the photoelectric effect is called the photovoltaic effect. Photodiode is characterized by fast response speed, wide sensitivity wavelength, and good linearity of light current.It is mainly used in electronic devices such as CD player, fire alarm, and remote control receiver of TV. It is also used for the purpose of measuring the intensity of solar light in the photovoltaic module using the effect of such a photodiode and increasing the power generation efficiency by tracking the position of the sun according to the measurement.

However, the conventional solar tracking technology using such a photodiode has a long time until the focus of the photodiode is irradiated with the photodiode, so the initial approach speed of the photovoltaic module is reduced, and the focus is again in case of being covered by clouds or when the weather is cloudy. There was a problem that the efficiency of solar power generation is poor because it did not respond quickly in the process of matching.

In addition, the photodiode and the condenser lens forming the focus of sunlight on the solar cell have limitations in the size of the photodiode and the range of tracking of the sun, and a plurality of tracking devices must be installed to track the sun over a wide range. There was a problem.

The matters described as the background art are only for the purpose of improving the understanding of the background of the present invention, and should not be taken as acknowledging that they correspond to the related art already known to those skilled in the art.

The present invention has been proposed to solve such a problem, and an object thereof is to extend the concept of a thermal sensor to a conventional photodiode sensor so that the sun can be quickly tracked in a wider range.

A solar tracking device according to the present invention for achieving the above object, a condensing lens to form the focus of sunlight; A sensing unit installed below the condensing lens and formed in a horn shape that becomes narrower toward the lower side of the converging lens so that a focal point is formed on the inner surface thereof, and a plurality of thermocouples are provided along a circumference; A photodiode provided at a lower end of the sensing unit and divided into a plurality of pieces; And outputting an induction signal such that the solar power module is tilted to the opposite side of the thermocouple having a high temperature among the thermocouples of the sensing unit, and precisely adjusting the solar power module to be tilted to the opposite side of the detected photodiode when the focus is detected on the photodiode. And a control unit for outputting a signal.

The condensing lens may be installed in the housing so as to be horizontal with the solar power module, and the sensing unit may be provided inside the housing, and the photodiode may be provided at the lower end of the sensing unit so as to be horizontal with the solar power module.

The sensing unit may have a polygonal pyramid shape in which a plurality of sensing panels form a side surface, and a thermocouple may be provided on each sensing panel, and the sensing unit may have a quadrangular pyramid shape formed of four sensing panels, and the control unit may detect focus on a photodiode. By comparing the temperature of each thermocouple until it can output the induction signal of up, down, left and right.

In addition, the photodiode may be quadrangular diodes formed in a quadrangular shape so that vertices are positioned on a tangent line where each sensing panel meets, and divided into diagonal lines, and the sensing unit includes a plurality of sensing panels vertically divided. It is composed of a heat insulating member may be coupled between each sensing panel.

Meanwhile, the solar tracking method according to the present invention is a solar tracking method for tilting a solar power module using a condenser lens, a sensor, a controller, and a driving unit so that the focus of the solar light is accurately formed on the solar power module. A focus inducing step of tilting the solar power module toward the opposite side of the solar focus formed on the inside of the sensing unit provided to narrow the width so that the focus reaches the lower end of the sensing unit; A focus sensing step of detecting whether a focus of sunlight reaches a photodiode provided at a lower end of the sensing unit by the focus inducing step; And a precision tracking step of tilting the solar power module toward the opposite side of the focus when the focus is sensed in the focus sensing step so that the focus is formed at the center of the photodiode.

In the focus derivation step, the temperature difference between the thermocouples provided along the circumference of the sensing unit may be compared to tilt the solar power module toward the opposite side of the solar focus.

In the precise tracking step, the photodiode is composed of a multi-divided photodiode, and the solar power module can be tilted to the opposite side of the solar focus by comparing the intensity of sunlight measured on the fragment of the divided photodiode.

In addition, the sun tracking method, if the focus is not detected in the sensing unit or photodiode, sets the altitude and azimuth angle of the sun at the current position, the altitude and azimuth angle of the sun and the altitude angle toward the current solar power module And comparing the azimuth angle and automatically tilting the solar power module with the set altitude and azimuth angle when there is an angle difference greater than or equal to a set value.

The precision tracking step may perform an automatic control step when the focus of the sun is not sensed for more than the time set in the sensing unit or the photodiode.

According to the sun tracking device having the structure as described above and the sun tracking method using the same, the sun is first tracked through the sensing unit, and secondly by using a photodiode to precisely track the sun in a wider range You can track quickly.

As a result, the tracking of the sun is quicker at the initial position, and when the clouds are lifted or the weather is sunny, the solar position can be quickly responded to, thus increasing the power generation efficiency of the solar module.

In addition, there is no need to add photodiodes or other tracking devices in order to broaden the range of solar tracking, which is effective and easy to maintain in generating a power generation device.

1 is a perspective view showing a condensing type solar power generation device installed with a solar tracking device according to an embodiment of the present invention.

2 is a plan view of the solar tracking device shown in FIG.

3 is a cross-sectional view taken along the line A-A of the solar tracking device shown in FIG.

4 is a view showing a sun tracking process of the sun tracking device shown in FIG.

FIG. 5 is a flowchart illustrating a sun tracking method using the sun tracking device shown in FIG. 1.

100: solar tracking device 120: housing

130: heat insulating member 140: condensing lens

160: sensing unit 180: thermocouple

200: photodiode F, F ', F' ': solar focus

Hereinafter, a solar tracking device according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view illustrating a concentrating solar power generator equipped with a solar tracking device according to an exemplary embodiment of the present invention, wherein the concentrating solar power generator includes a plate 12 through a driving unit (not shown) in a base 16 of a lower portion. ) Is installed, and a plurality of condensing solar elements 14 are embedded in the plate 12. The concentrating solar power module 10 is installed with a solar tracking device 100 according to an embodiment of the present invention so that the focus of the solar light is always perpendicular to the module. By the solar tracking device 100 according to the embodiment of the present invention, the solar power module 10 is driven by tilting the driving unit to always generate power while tracking the sun. Meanwhile, although not shown, the driving unit may control the tilting by the control unit of the sun tracking device.

Although the solar tracking device according to the embodiment of the present invention has been described with reference to the embodiment applied to the condensing photovoltaic device as shown in FIG. 1, the solar tracking device of the present invention is not limited to the condensing photovoltaic device. It may not be widely applied to the solar tracking equipment or conventional solar power equipment to maximize the efficiency of power generation.

FIG. 2 is a plan view of the sun tracking device shown in FIG. 1, and FIG. 3 is a cross-sectional view taken along line A-A of the sun tracking device shown in FIG. A solar tracking device according to an embodiment of the present invention is a solar tracking device provided for tracking the position of the solar concentrating solar module 10, the condensing lens 140 to form a focus of sunlight; It is installed below the condenser lens 140, is formed in a horn shape that becomes narrower toward the bottom is formed by the focus by the condenser lens 140 on the inner surface, a plurality of thermocouples 180 are provided along the circumference Sensing unit 160; A photodiode 200 provided at a lower end of the sensing unit 160 and divided into a plurality of pieces; And outputs an induction signal such that the solar power module 10 is tilted to the opposite side of the thermocouple having a high temperature among the thermocouples 180 of the sensing unit 160, and when the focus is detected on the photodiode 200, the detected photo And a controller (not shown) for outputting a fine adjustment signal such that the solar power generation module 10 is tilted to the opposite side of the diode piece.

The condenser lens 140, the detector 160, and the photodiode 200 may provide a housing 120 in the solar module 10 and may be installed in the housing 120. Specifically, the condenser lens 140 ) Is installed in the housing 120 so as to be horizontal with the solar power module 10, the sensing unit 160 is provided inside the housing 120, and the photodiode 180 is located at the bottom of the sensing unit 160. It may be provided to be parallel to the power generation module 10.

The condenser lens 140 may include various lenses capable of forming a focal point of sunlight, such as a convex lens, a semi-convex lens, a spherical lens, or an aspherical lens. Since the condenser lens 140 and the photodiode 200 are installed horizontally in the solar power generation module 10, the altitude angle or the azimuth angle is also formed in the same manner as the solar power generation module 10, thus focusing on the solar tracking device 100. If this is exactly the same can be seen that the focus of the solar module 10 also coincides.

A condenser lens 140 is installed at the upper end of the housing 120 to transmit incident sunlight and form a focal point. The focus of the formed sunlight is formed on the inner surface of the sensing unit 160 inside the housing 120, and the thermocouple 180 provided in the sensing unit 160 measures whether the focus is formed and the degree of heat generation of the sensing unit 160. This is to know where the focus of the solar light is formed in the current sensing unit 160. Therefore, through this, the solar power generation module 10 will know where the focus is formed.

The present invention can detect the focus of the sun in a relatively wide range than the case of using only the photodiode through the focus detection of the sensing unit 160, according to the position of the focus detected by the sensing unit 160 solar module By tilting (10), the sun can be tracked more quickly. This allows the solar power module to be aligned to the position of the sun faster than the conventional solar tracking with the photodiode alone, and there is no need to install additional photodiodes or provide other tracking devices for quick alignment. It is also concise in its configuration and considerably convenient for further maintenance.

The sensing unit 160 may be provided inside the housing 120 below the condenser lens 140 of the upper portion of the housing 120. The sensing unit 160 is installed below the condenser lens 140, and is formed in a horn shape that becomes narrower toward the lower side thereof, thereby forming a focus by the condenser lens 140 on an inner side thereof, Thermocouple 180 is provided. Specifically, the sensing unit 160 may be in the shape of a cone or polygonal inverted upside down, when the sensing unit 160 is in the shape of a polygonal pyramid, a plurality of sensing panels form the sides of the polygonal pyramid, the thermocouple on each sensing panel 180 may be provided. The thermocouple 180 provided in each sensing panel can measure the temperature of each sensing panel, and thus can determine where the focus of the current solar light is formed. Accordingly, the

thermocouples

182, 184, 186, and 188 are provided in the respective sensing panels, and even though the sensing unit has a cone shape, the

thermocouples

182, 184, 186, and 188 may be configured as a plurality of sensing panels in which the cones are vertically divided.

2 and 3 illustrate a case in which the sensing unit 160 has a quadrangular pyramid shape composed of four

sensing panels

162, 164, 166, and 168. When the sensing unit 160 is composed of four sensing panels, each of the sensing panels 160 has directions of east / west / south / north. Through this, it is possible to determine which one of the respective spots has been formed. When the solar module 10 is tilted in the opposite direction of the point, the solar tracking device is also tilted and the focus formed is closer to the photodiode 200. Since the insulating member 130 is installed between the sensing panels, heat exchange between the sensing panels can be blocked, and the position of focus can be clearly identified through more accurate heat measurement.

Each temperature value measured by the thermocouple 180 in the sensing panel is transmitted to a controller (not shown). Although not shown, the control unit may be provided at the lower end of the sensing unit 160 in the housing 120, or may be provided at another position of the solar power module 10 so as to be in electrical communication with the sensing unit and the photodiode. It may be.

The control unit receives a temperature value detected by the thermocouple 180 of the sensing unit 160, and determines a thermocouple having a high temperature among them, so that the solar power generation module 10 is tilted to the opposite side of the thermocouple. The guidance signal is output to the movable part (not shown). Although not shown, the movable part is configured to change the position or tilting angle of the solar power module. For example, the movable part is divided into a horizontal driving part and a vertical driving part so that the solar power generation module can be tilted in all directions of up, down, left and right. can do. The control unit transmits a tilting signal in a predetermined direction to the movable unit based on the measurement result of the thermocouple, the movable unit tilts the solar power module according to the tilting signal, and the solar tracking device installed in the solar power module is also tilted together.

The photodiode 200 is installed at the lower end of the sensing unit 160 to allow more accurate sun tracking. The photodiode 200 is installed at the lower end of the sensing unit 160. As described above, the sensing unit 160 has a shape of a horn, and cuts a part of the vertex of the horn and the photodiode 200 on the cut surface. Install it. The sensing unit 160 senses the focus of sunlight, and accordingly, the solar power module is tilted. When this process is performed two or three times, the focus of the sunlight is formed on the photodiode 200. The photodiode 200 may measure the intensity of sunlight, and when the input of the predetermined intensity of the solar intensity into the control unit is the focal point, the photodiode 200 may determine whether the solar light is focused on the photodiode 200. .

When the photodiode 200 uses a multi-segmented photodiode divided into a plurality of pieces, the photodiode 200 can be precisely controlled so that the photodiode 200 is focused in the center according to the position of the solar focus. In the embodiment shown in the drawing, the photodiode is a four-part photodiode divided into four

pieces

220, 240, 260, and 280, and the photodiode 200 is formed in a quadrangular shape such that a vertex is formed on a tangent point where each

sensing panel

162, 164, 166, 168 meets. It is combined to be positioned, and have a piece divided into four pieces (220, 240, 260, 280) on a diagonal basis. Like the sensing unit 160, the photodiode structure detects the solar focus in the up / down / left / right directions and transmits the signal to the control unit, and the control unit receives the signal of each piece of the photodiode to provide the The position of the focal point is detected and the precision control signal is output to the movable part so that the solar power generation module 10 is tilted in the direction opposite to the focal point.

Through the configuration of the sensing unit 160, the photodiode 200, and the control unit, the solar power module is tilted so that the focus of the sunlight is close to the photodiode in the sensing unit 160, and the photodiode 200 is secondary. By tilting the solar power module so that the focal point is centered inside, the single tracker enables fast and accurate sun tracking.

4 illustrates a sun tracking process of the sun tracking device. (A) When the focal point F of the sun is formed on the left side of the upper panel 162 of the sensing panel of the sensing unit 160, the control unit may have Note that focus is formed on the top panel 162 through the

thermocouples

182, 184, 186, 188. For reference, the focal point of the sunlight may be blurred as the distance from the center, but the difference in the thermocouple temperature will occur by the formation of the focus alone, at least the position of the focal point is possible. When the controller recognizes the focus of the upper panel 162, the controller outputs an induction signal for tilting the solar power module in the opposite direction to the position where the focus is formed, that is, downward. With the tilting of the solar modules, the focus of the sunlight is shifted downward. The closer the focus of sunlight is to the center, the smaller the focus will be and the higher the intensity will be.

(b) As the focus F 'is moved downward, the control unit detects the moved position of the focus through the thermocouple 184 of the left panel 164. In this case, the temperature of the thermocouple 184 of the left panel 164 will be the highest, and accordingly, the control unit transmits a tilting guidance signal to the right side opposite to the left side to the driving unit of the solar power module. As a result, the focus of sunlight is shifted to the right to be formed inside the photodiode.

(c) When the focal point F '' of the solar light is formed on the photodiode, the pieces of each photodiode can measure the intensity of the sunlight, so that the current focus is located on any of the fragments of the

photodiode

220, 240, 260 and 280 in the control unit. You can see if If it is detected that the focal point is located at the left side 240, a tilting signal is output to the right side. In this case, the signal is a fine adjustment signal and the solar power module has a very small angle (for example, 0.1 degree). The signal is transmitted to the movable part so as to be tilted. By precise control of the photodiode, the focus of sunlight is concentrated at the center of the photodiode, and after that, the intensity of the sunlight is detected in the photodiode piece continuously or continuously and the focus is continuously aligned at the center. Through this process, the sun tracking device continuously tracks the sun, and the solar power module can always face the sun in front to maintain the maximum power generation efficiency.

Particularly, according to an embodiment of the present invention, when the weather improves again after cloudy or when the clouds pass after the sun is obscured by the clouds, the sun needs to track the sun again. Since the focus is established, the sensor can be quickly measured to align the sun's focus on the photodiode and immediately perform precise tracking to maximize the efficiency of solar power generation.

Meanwhile, FIG. 5 is a flowchart illustrating a sun tracking method using the sun tracking device shown in FIG. 1. The solar tracking method according to an embodiment of the present invention includes a condensing lens so that the focus of sunlight is accurately formed in a solar power module. , A solar tracking method for tilting a solar power module by using a sensor, a controller, and a driver, wherein the focus of the solar power module is tilted to the opposite side of the solar focal point formed inside the sensing unit provided to narrow the width below the condenser lens. Focus derivation step (S210) to reach the lower end of the sensing unit; Focus detection step (S220) by the focus derivation step (S210), detecting whether the focus of the sunlight reaches the photodiode provided at the lower end of the sensing unit; And a precision tracking step S230 of tilting the solar power module toward the opposite side of the focus when the focus is sensed in the focus sensing step S220 such that the focus is formed at the center of the photodiode.

In addition, the sun tracking method is to set the altitude and azimuth angle of the sun at the current position, if the focus is not detected in the sensing unit or photodiode, the altitude and azimuth angle of the sun and the altitude angle toward the current solar power module And comparing the azimuth angle and automatically tilting the solar power generation module with the set altitude angle and the azimuth angle when there is an angle difference greater than or equal to a set value.

Solar tracking method according to an embodiment of the present invention is largely composed of a sensor tracking process (S200) and a program tracking process (automatic control step, S300). Sensor tracking process (S200) is to track the focus of the solar power module by directly sensing the focus of sunlight in the physical configuration of the sensor method, program tracking process (S300) without a direct detection of sunlight by using azimuth and elevation angles It is to track the focus of solar modules. In addition, the sensor of the sensor tracking process (S200) may be used the solar tracking device of the present invention described above, the sensor tracking process (S200) and the program tracking process (S300) is used in a complementary manner.

First, it detects the focus of sunlight through the sun tracking device (S100). Detects whether the focus of the solar light is formed on the sensing unit or the photodiode of the solar tracking device, and if the focus is detected, the process proceeds to the sensor tracking process (S200), and if the focus is not detected, the process proceeds to the program tracking process (S300). do.

When the focus of sunlight is sensed and enters the sensor tracking process (S200), the focus induction step is executed (S210). In the focus derivation step (S210), the solar power module is tilted toward the opposite side of the solar focal point formed inside the sensing unit provided to narrow the width below the condenser lens to induce the focus to reach the lower end of the sensing unit. This is done through the sensing unit and thermocouple of the solar tracker described above and as a result the focus of sunlight is bound to the photodiode at the bottom.

If the focus of the sunlight is detected in the photodiode through the two to three times the focus guide step (S220). In the precision tracking step S230, the solar power module is tilted to the opposite side of the focus by using the multi-segment photodiode at the bottom of the sensing unit so that the focus reaches the center of the photodiode. If the sun's focus is on the center of the photodiode (for example, in 0.1-degree increments), the solar module can see the sun accurately and maintain maximum power generation efficiency. On the other hand, the focus of sunlight may not be temporarily formed in the sensing unit or photodiode due to weather change or failure of the sensor. In this case, if the focal point is not formed for a certain time, it enters the program tracking process so that sunlight can be tracked by the azimuth and altitude angles (S250). In the example of FIG. 5, when the focus of the sunlight is not sensed for 5 minutes, the program tracking process is performed. Hereinafter, the program tracking process (S300) will be described in detail.

When detecting the focus of sunlight through the sun tracking device, if the focus of the sunlight is not detected by the sensing unit or the photodiode, the process proceeds to the program tracking process (automatic control step, S300). The program tracking process sets the altitude and azimuth angle of the sun at the current position, and compares the altitude and azimuth angle of the sun with the altitude and azimuth heading of the current solar module. Perform an automatic control step (S300) for tilting the set altitude and azimuth. In the automatic control step (S300) to receive the position information of the modern solar power module through the GPS module, and to set the altitude and azimuth angle of the sun at the current position using the received position information (S310). In the case of solar azimuth and elevation angles, the current time and the geographic information of the received GPS may be imported into a data table prepared in advance, or may be obtained by calculation through a formula. Altitude and azimuth calculation formula may have a variety of calculation methods, an example of the calculation formula can be applied as follows.

Equation 1

When the altitude and azimuth angle of the current sun are calculated as described above, it is compared with the altitude and azimuth angle of the current solar module to tilt the solar power module at the calculated angle when there is an angle difference greater than the set value ( S320, S330). In the illustrated embodiment, the set value is set to 0.5 degrees. When the difference in angle is less than 0.5 degrees, the focus of the sunlight at the presently directed angle can be formed in the sensing unit and the photodiode, and the process proceeds to the sensor tracking process (S200) to perform the focus derivation step (S210). In this state, if the focus of the solar light is not formed for 5 minutes, the process goes back to the program tracking process (S250). If the difference is more than 0.5 degrees, the solar module is tilted at the altitude and azimuth which are the set values (S330). If the incidence of sunlight to the sensing unit or photodiode is detected during the tilting process to the set value or after the tilting, the tilting is stopped and the sensor tracking process is started (S340). According to such a sun tracking method, the sensor tracking and the program tracking are performed in parallel, so that even if the weather is cloudy, the sun can be continuously tracked and the accurate tracking can be performed immediately at the location when the weather improves, thereby providing optimum power generation efficiency. It will be able to maintain the efficiency of solar power generation, especially in climatic conditions such as Korea, where the weather fluctuates severely.

On the other hand, it is a time when the solar power generation is not possible from sunset to sunrise. Therefore, during this time, in order to protect the solar power module from inclement weather or typhoon, there is a safety step for tilting the solar power module so that the solar power module is aimed at 40-50 degrees azimuth and 80-90 degrees altitude with respect to 0 degree north of North Korea. Can be performed (S400, S500). The sunset may be determined whether the sunset is based on the current time or azimuth and elevation angle. By keeping the azimuth angle at 40 ~ 50 degrees in the safe phase, it is possible to quickly track the sunlight immediately after sunrise, and maintain the solar power module in parallel with the wind direction at night by keeping the altitude angle at 80 ~ 90 degrees. Module damage can be prevented.

The solar tracking method according to an embodiment of the present invention is summarized as follows with reference to FIG. 5.

1-1. When the solar module is activated, first, the sensing unit and the photodiode detect the focus of sunlight (S100).

1-2. When the focus of sunlight is sensed, it enters the sensor tracking process (S200).

1-3. In the sensor tracking process, the focus of the solar light is induced to the photodiode through the focus induction step, and the sun is precisely tracked in units of 0.1 degrees by the four-segment photodiode in the precision tracking step (S210, S220, and S230).

1-4. If the focus of the sunlight is not detected for five minutes during the focus derivation step or the precision tracking step, the program proceeds to the program tracking process (S240, S250). It is possible to keep track of the sun, which means that if the weather is good again, it can quickly enter the sensor tracking process to ensure the efficiency of solar power generation).

2-1. If the focus of the sunlight is not detected by the detection unit and the photodiode, the process proceeds to the program tracking process (automatic control step) (S300).

2-2. In the program tracking process, the current position is received through GPS, and the azimuth and altitude angles of the sun at the current position are calculated and compared with the azimuth and altitude angles currently directed by the solar power generation module (S310 and S320).

2-3. As a result of the comparison, if the difference is less than 0.5 degrees, the sensor goes into the tracking process to detect the focus of the sunlight (if the focus of the sunlight is not detected for 5 minutes, the process goes back to the program tracking process as described above).

2-4. If the difference is 0.5 degrees or more as a result of the comparison, the solar module is tilted at the calculated altitude and azimuth (S330).

2-5. After the completion of the tilting or during the tilting process, if the focus of sunlight is detected, the process immediately proceeds to the sensor tracking process. If the focus of the sunlight is not detected even after the tilting, it is considered that the weather is not good continuously and continues the program tracking process (S340).

2-6. If it is determined that the sunset situation (S400, S500).

While the invention has been shown and described with respect to particular embodiments, it is within the skill of the art that various changes and modifications can be made therein without departing from the spirit of the invention provided by the following claims. It will be self-evident for those of ordinary knowledge.

Claims

As a solar tracking device provided for tracking the location of the solar collection module 10,

A condenser lens 140 forming a focus of sunlight;

It is installed below the condenser lens 140, is formed in a horn shape that becomes narrower toward the bottom is formed by the focus by the condenser lens 140 on the inner surface, a plurality of thermocouples 180 are provided along the circumference Sensing unit 160;

A photodiode 200 provided at a lower end of the sensing unit 160 and divided into a plurality of pieces; And

The photodiode is output when the solar power module 10 is tilted toward the opposite side of the thermocouple having a high temperature among the thermocouples 180 of the sensing unit 160, and the focus is detected on the photodiode 200. And a control unit for outputting a fine adjustment signal such that the solar module 10 is tilted to the opposite side of the piece.
The method according to claim 1,

The condenser lens 140 is installed in the housing 120 so as to be horizontal with the solar power module 10, and the sensing unit 160 is provided inside the housing 120 and has a photo at the bottom of the sensing unit 160. Solar tracking device, characterized in that the diode 180 is provided to be parallel to the solar module (10).
The method according to claim 1,

The sensing unit 160 has a polygonal pyramid shape in which a plurality of sensing panels form a side surface, and a thermocouple 180 is provided in each sensing panel.
The method according to claim 1,

The sensing unit 160 has a quadrangular pyramid shape consisting of four sensing panels 162, 164, 166, and 168, and the control unit compares the temperature of each thermocouple 182, 184, 186, 188 until the focus is detected on the photodiode 200. Solar tracker, characterized in that for outputting.
The method according to claim 4,

The photodiode 200 is formed in a quadrangular shape so that vertices are positioned on a tangential line where each sensing panel 162, 164, 166, and 168 meet, and is a quadrant diode divided into four pieces 220, 240, 260, and 280 based on a diagonal line. Tracking device.
The method according to claim 1,

The sensing unit 160 is composed of a plurality of sensing panels divided in the vertical direction and the solar tracking device, characterized in that the insulating member 130 is coupled between each sensing panel.
A solar tracking method for tilting a solar power module using a condenser lens, a sensor, a controller, and a driving unit so that the focus of solar light is accurately formed on the solar power module.

A focus derivation step (S210) of tilting the solar power module toward the opposite side of the solar focus formed on the inner side of the sensing unit provided to narrow the width below the condenser lens such that the focus reaches the lower end of the sensing unit;

Focus detection step (S220) by the focus derivation step (S210), to detect whether the focus of the sunlight reaches the photodiode provided at the lower end of the sensing unit; And

And a precision tracking step (S230) of tilting the solar power module toward the opposite side of the focus when the focus is sensed in the focus sensing step (S220) so that the focus is formed at the center of the photodiode.
The method according to claim 7,

The focus derivation step (S210), by comparing the temperature difference of the plurality of thermocouples provided along the circumference of the sensing unit, characterized in that the solar module tilted on the opposite side of the solar focus.
The method according to claim 7,

The precise tracking step (S230), the photodiode is composed of a multi-divided photodiode, by comparing the intensity of sunlight measured on the slice of the divided photodiode, characterized in that the tilting of the solar power module to the opposite side of the solar focus Sun tracking method.
The method according to claim 7,

If the focus is not detected by the sensing unit or the photodiode, the altitude and azimuth angle of the sun at the current position are set (S310), and the altitude and azimuth angles of the sun and the current solar module are set. And an automatic control step (S300) of tilting the solar power module to the set altitude and azimuth angle (S300) when there is an angle difference greater than or equal to a set value.
The method according to claim 10,

The precision tracking step (S230) is a solar tracking method, characterized in that to perform an automatic control step (S300) when the focus of the sun is not detected for more than the time set in the sensing unit or photodiode.