KR20200023939A - Double Axis Tracking Type Solar Photovoltaic System - Google Patents

Abstract

The present invention relates to a photovoltaic power generation system for dual-axis tracking, which can hydraulically change the angle of a light collection plate on double axes in accordance with a change in the solar altitude by vertical and horizontal rotation, rotate 360° in horizontal rotation to increase power generation efficiency by short-distance movement for returning to the original position in the morning if the day is long and the night is short as in summer, respond to natural disasters such as a typhoon or heavy snow, and increase power generation efficiency by lowering the temperature of a photovoltaic module making up the light collection plate by an air-cooling system. The photovoltaic power generation system for dual-axis tracking comprises: a solar light collection plate consisting of a plurality of photovoltaic modules; an upper frame to support the solar light collection plate; a lower post connected to the center of the lower surface of the upper frame to support the upper frame; and a rotation driving unit arranged on a lower side of the lower post to horizontally rotate the upper frame connected to the lower post. The upper frame is connected to be vertically rotated with respect to the lower post. The lower post includes a hydraulic cylinder connected to a working fluid tank connected to the front surface of the lower post and the lower surface of the front side of the upper frame to adjust an inclination angle of the upper frame. The rotation driving unit horizontally rotates the upper frame connected to the lower post 360° infinitely by hydraulic pressure.

Description

Double Axis Tracking Type Solar Photovoltaic System

The present invention relates to a hydraulically-driven biaxially tracked photovoltaic power generation system, and in detail, can not only increase the efficiency of photovoltaic power generation, but also effectively cope with natural disasters such as typhoons and heavy snow. It is about the system.

The photovoltaic device is divided into a fixed type, a single axis type, a biaxial type, and the like depending on whether the angle and direction of the array can be changed in accordance with the change in the position of the sun.

Fixed type refers to the installation of fixed angle and direction of the array irrespective of the change of the position of the sun, single-axis means that the array can be adjusted vertically or horizontally according to the change of position of the sun by using one axis, biaxial Equation indicates that the array can be adjusted vertically and horizontally according to the change of position of the sun using two axes.

In general, in terms of power generation efficiency, it is more advantageous from a fixed type, a short type, and a biaxial type, but there is a problem in that the burden is increased as much in terms of installation cost and maintenance. Therefore, the solar cell apparatus has been researched and developed to overcome the disadvantages and maximize the advantages in each method.

In particular, in the case of the biaxial type, since the array can be adjusted in the vertical direction and the horizontal direction by tracking the movement direction of sunlight, much research and development has been made in that a larger amount of power generation is possible than the conventional fixed or short axis type. For example, Korean Patent No. 10-1044911 (hereinafter referred to as "Patent Document 1"), "solar light that can automatically adjust the inclination angle of the photovoltaic module board according to the change in the altitude of the sun. Hydraulic angle adjusting device of a generator "is disclosed.

That is, the patent document 1 has a structure in which the body is rotated by the hydraulic pressure introduced into the semi-circular operation recess through the hydraulic supply pipe of the lower mounting table, the horizontal horizontal hydraulic supply pipe of the left and right horizontal extending from the center of the body of the front and rear angle control According to the piston rod, the angle of the front and rear sides of the photovoltaic module plate is adjusted.

 However, in the case of Patent Literature 1, since only half rotation is possible by the piston projection by hydraulic pressure, there is a problem that it is difficult to efficiently track all the positions of sunlight according to the change of the circumference of the sun in summer when the day is longer than night.

In addition, in the case of Patent Document 1, it is described that the angle of inclination of the photovoltaic module plate can be automatically adjusted, but the contents of the tracking method of solar light for automatically adjusting the inclination angle of the photovoltaic module plate are disclosed. There is a problem that it is difficult to expect the efficient operation of the photovoltaic system substantially.

In addition, in the case of Patent Document 1, a hydraulic method is used as a driving means for adjusting the inclination angle of the light collecting plate module. In consideration of the load of the light collecting plate module and the frame supporting the light collecting plate module, the hydraulic method may be a very suitable driving means.

Nevertheless, in reality, a large-capacity electric motor is used instead of the hydraulic method. This is because the photovoltaic device is installed outdoors throughout the four seasons, because the operation of the hydraulic oil, the viscosity of which varies sensitively with temperature, varies greatly with the seasons, so it is difficult to control the hydraulic drive.

That is, the viscosity of the hydraulic fluid in the hydraulic system has a very important meaning, when operating in a state that is not the proper viscosity causes various problems.

In particular, during the winter, the working oil increases in viscosity when the temperature drops. In addition, the higher the viscosity, the poorer the flow of the hydraulic fluid, the higher the pressure in the system, the more energy is consumed to drive the hydraulic system, the shorter the life of the device or can cause a big accident.

Nevertheless, Patent Document 1 merely discloses a hydraulic method with respect to the drive means, and does not have any solution to this problem.

In recent years, in the photovoltaic device, a decrease in power generation efficiency due to an increase in the surface temperature of the solar cell module has emerged as an important problem.

In other words, when the amount of insolation increases, the surface temperature of the module (cell) increases, but when the surface temperature of the module rises by 1 ° C, power generation efficiency is known to decrease by 0.45 to 0.55%. When the surface temperature of the module exceeds 40 ° C, 1 It is known that power generation efficiency decreases by more than 1% every time the temperature rises.

In order to solve this problem, Korean Patent No. 10-1148020 (hereinafter referred to as "Patent Document 2") discloses a cooling system that maintains or improves efficiency by spraying cooling water onto a solar module.

However, in the case of Patent Literature 2, it is necessary to supply cooling water for cooling the solar module, and in many cases, it is difficult to supply sufficient cooling water due to the location conditions of the photovoltaic power generation facility. There is a problem in that the cost of cooling water is greater than the profit.

In addition, damage to a photovoltaic power generation facility due to natural disasters such as typhoons and snowfall has emerged as an important problem. As described above, Patent Documents 1 and 2 have a problem in that they cannot cope with such problems at all.

Patent Document 1: Korean Patent Publication No. 10-1044911 Patent Document 2: Korean Patent Publication No. 10-1148020

The present invention is made in view of the above-described conventional problems, and it is possible to automatically change the position of the sun and change the angle of the light collecting plate vertically and horizontally by a hydraulic method, and cope with natural disasters such as typhoons and heavy snow. It is possible to provide a biaxially tracked photovoltaic power generation system that can increase power generation efficiency by lowering the temperature of the photovoltaic module constituting the light collecting plate through an air-cooled cooling system.

The biaxially tracked photovoltaic power generation system of the present invention includes a photovoltaic panel including a plurality of photovoltaic modules, an upper frame supporting the photovoltaic panel, and connected to a center of a lower surface of the upper frame to support the upper frame. A lower pillar and a rotation driving unit provided below the lower pillar to rotate the upper frame connected to the lower pillar in a horizontal direction, wherein the upper frame is rotatably connected to the lower pillar in a vertical direction. The lower pillar includes a hydraulic cylinder connected to a front surface of the lower pillar and a front lower surface of the upper frame and connected to a hydraulic oil tank for adjusting an inclination angle of the upper frame, and the rotation driving unit is connected to the lower pillar by hydraulic pressure. Rotate the connected upper frame 360 ° infinitely in the horizontal direction It shall be.

The rotation drive unit of the biaxially tracked photovoltaic power generation system of the present invention includes a turntable connected to the lower pillar, and the turntable connected to the lower pillar is characterized in that connected by a rotary joint.

The biaxially tracked photovoltaic power generation system of the present invention further includes a control unit for controlling the driving of the hydraulic cylinder and a light tracking sensor unit provided on a surface of the solar light collecting plate, and the light tracking sensor units face each other in the vertical direction. And a first light quantity sensor unit and a second light quantity sensor unit, and a third light quantity sensor unit and a fourth light quantity sensor unit facing each other in the left and right directions, wherein the first light quantity sensor unit is configured to measure the amount of light incident from sunlight. And a first cap for blocking a part or all of the incident light inclined from an upper side than the sunlight incident perpendicularly to the first light quantity sensor, and the second light quantity sensor unit sensing the first light quantity sensor. And a second light sensor that senses the amount of light incident from sunlight and a sun light that is inclined downward from the sun light that is incident perpendicularly to the second light sensor. It comprises a second cap for blocking part or all, wherein the third light amount sensor unit, the third light amount sensor for sensing the amount of light incident from the sunlight and the solar light incident horizontally to the third light amount sensor And a third cap which blocks a part or all of the sunlight incident on the left side, wherein the fourth light quantity sensor unit includes a fourth light quantity sensor and a fourth light quantity sensor configured to sense the amount of light incident from the sunlight. It includes a fourth cap for blocking a part or all of the incident light inclined from the right side than the sunlight incident horizontally, the control unit, the control unit, the difference in the amount of light measured by the first light sensor and the second light sensor If there is, to control the driving of the hydraulic cylinder so that the difference between the amount of light measured by the first light amount sensor and the second light amount sensor, and the third light amount When there is a difference in the amount of light measured by the sensor and the fourth light amount sensor, the turntable driving is controlled to minimize the difference between the amount of light measured by the third and fourth light amount sensors.

The biaxially tracked photovoltaic power generation system of the present invention includes a load sensor for measuring a load acting on the module of the solar light collecting plate, a wind speed sensor capable of measuring the intensity of wind in the surrounding area, and the solar light collecting plate. Further comprising a rain sensor for measuring the amount and intensity of the rain falling, wherein the control unit, if the load measured by the load sensor exceeds the set range, the solar light collecting plate of the hydraulic cylinder to be perpendicular to the horizontal plane When the driving is controlled and the wind intensity measured by the wind speed sensor exceeds a set range, the driving of the hydraulic cylinder is controlled so that the solar light collecting plate extends side by side with respect to a horizontal plane, and measured by the rain sensor. If the amount of rain exceeds the set range, the solar light collector becomes perpendicular to the horizontal plane and then spread out side by side. It characterized in that for controlling the drive of the hydraulic cylinder to repeat the losing process.

The biaxially tracked photovoltaic power generation system of the present invention further includes a temperature sensor for measuring the surface temperature of the photovoltaic module of the solar light collecting plate, and a cooling system controlled by the control unit. An air supply unit for drawing and supplying cooled air, a main flow path through which air supplied from the air supply unit moves, a plurality of branch flow paths for supplying air from the main flow path to the solar module, and the solar light A plurality of cooling modules positioned below each of the solar modules of the light collecting plate and supplying air supplied from the branch flow paths to the lower surface of the solar module to cool the photovoltaic module; It comprises a plurality of injection nozzles for injecting air to the surface of the, the solar light measured by the temperature sensor When the surface temperature of the module exceeds the set temperature, it is characterized in that for supplying the external air cooled by the air supply unit under the control of the controller.

According to the present invention, since the position of the sun can be automatically tracked and the angle of the light collecting plate can be changed vertically and horizontally by a hydraulic method, the amount of power generation and power generation efficiency of the photovoltaic power generation system can be improved.

 In addition, according to the present invention, it is possible to rotate 360 ° infinitely when rotating in the horizontal direction, even if the day is long and the night is short, such as summer, it is possible to track and develop for all positions of the sun, short to return to the original position in the morning Because the distance can be moved, the power consumption used to drive the system can be reduced.

In addition, according to the present invention, by using a load sensor, a wind speed sensor, and the like to detect and respond to natural disasters such as typhoons and heavy snow in advance, it is possible to prevent damage to the solar power plant due to natural disasters.

In addition, according to the present invention, the power generation efficiency can be increased by lowering the temperature of the solar module constituting the light collecting plate through the air-cooled cooling system.

1 is a perspective view of a photovoltaic power generation system of the present invention
Figure 2 is a rear perspective view of the photovoltaic power generation system of the present invention
3 is a perspective view of a support frame for supporting a solar light collecting plate;
4 is a view for explaining the configuration and operation of the hydraulic cylinder
5 is a view for explaining the configuration and operation of the rotation drive unit;
6 is a view for explaining the configuration of the light tracking sensor unit;
7 is a view for explaining the inclination adjustment range of the solar light collecting plate
8 is a view for explaining the cooling device of the module of the solar light collecting plate
9 is a view for explaining a cooling system of the present invention.

Specific embodiments of the biaxially tracked photovoltaic power generation system (hereinafter, referred to as "photovoltaic power generation system") of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a photovoltaic power generation system of the present invention, FIG. 2 is a rear perspective view of the photovoltaic power generation system of the present invention, FIG. 3 is a perspective view of a support frame for supporting a solar light collecting plate, and FIG. 5 is a view for explaining the configuration and operation, Figure 5 is a view for explaining the configuration and operation of the rotary drive, Figure 6 is a view for explaining the configuration of the light tracking sensor unit, Figure 7 is a tilt control of the solar light collecting plate It is a figure for demonstrating the range, FIG. 8 is a figure for demonstrating the cooling apparatus of the module of a solar light collecting plate, and FIG. 9 is a figure for demonstrating the cooling system of this invention.

In addition, in the present invention, the up / down, left / right, front / rear directions follow a conventional method with reference to the drawings. In addition, in the present invention, "plane" is assumed to be "horizontal plane", unless otherwise specified.

First, the solar power generation system of the present invention, as shown in Figures 1 to 3, the solar light collecting plate 100 consisting of a plurality of solar modules 110, and the upper portion for supporting the solar light collecting plate 100 The lower pillar 300 connected to the center of the lower surface of the frame 200, the upper frame 200 to support the upper frame 200, and provided below the lower pillar 300 by the hydraulic pressure 300 and a rotation drive unit 400 for rotating the upper frame 200 connected to the lower pillar 300 indefinite 360 °.

First, the solar light collecting plate 100 is an array composed of a plurality of solar modules 110 composed of a plurality of cells, and is fixed through a support frame 111 supporting the plurality of solar modules 110. Is done.

As shown in FIG. 1, at least one light tracking sensor unit 120 and a rain sensor 150 are provided on a surface of the solar light collecting plate 100, and at least one is provided on a rear surface of the solar light collecting plate 100. The load sensor 130 and the temperature sensor 140 are provided above.

The light tracking sensor unit 120 is a sensor unit for tracking the position of sunlight by measuring the amount of light of the sunlight, the rain sensor 150 is a sensor for measuring the amount and intensity of rain water falling on the solar light collecting plate 100 And, the load sensor 130 is a sensor for measuring the load acting on the module of the solar light collecting plate (100). The temperature sensor 140 is a sensor for measuring the surface temperature of the module of the solar light collecting plate 100.

In addition, the solar light collecting plate 100 is supported by the upper frame 200, the upper frame 200 is connected to the lower pillar 300 by a hinge 210, the lower pillar 300 It is possible to rotate in the vertical direction with respect to.

That is, since the lower pillar 300 is connected to the center of the front and rear directions of the upper frame 200, and the upper frame 200 rotates in the vertical direction with respect to the lower pillar 300, the upper frame ( The front and rear ends of the 200 are moved up and down along the circumference of the upper frame 200, respectively. In addition, the inclination angle of the upper frame 200 with respect to the ground is changed, and the inclination angle with respect to the ground of the solar light collecting plate 100 supported by the upper frame 200 is also changed.

Next, as shown in FIGS. 2 and 4, the lower pillar 300 is connected to the center of the lower surface of the upper frame 200 to support the upper frame 200. The lower pillar 300 The front surface 313 of the) is connected to the front lower surface 312 of the upper frame 200 is provided with a hydraulic cylinder 310 for adjusting the inclination angle with respect to the ground of the solar light collecting plate 100.

That is, the hydraulic cylinder 310, as shown in Figures 2 and 4, the lower end of the hydraulic cylinder 310 is fixed to the front surface 313 of the lower column 300, the hydraulic pressure The upper end of the piston reciprocating perpendicularly to the cylinder 310 is located between the front side of the upper frame 200 (the front end of the upper frame 200 and the position of the upper frame 200 to which the lower pillar 300 is connected). Medium) is fixed to the lower surface 312.

In addition, in the present invention, as illustrated in FIG. 2, the control unit 500, the driving motor 320, and the hydraulic oil tank 330 are provided on the rear surface of the lower pillar 300. The position of the control unit 500, the drive motor 320 and the hydraulic oil tank 330 is not limited thereto.

In addition, the hydraulic cylinder 310, as will be described later, of the hydraulic oil supplied from the hydraulic oil tank 330 to the hydraulic cylinder 310 by the drive motor 320 controlled by the control unit 500. The hydraulic piston is a reciprocating linear motion, in which the operation of the hydraulic cylinder 310 is known in the art, so description thereof will be omitted.

That is, the angle of inclination of the solar light collecting plate 100 with respect to the ground is changed by the hydraulic cylinder 310, as shown in FIG. 7, at this time with respect to the ground of the solar light collecting plate 100 with respect to the ground. The change range of the inclination angle can be changed in the range of 0 ° to 90 °.

The problem is that, as described above, due to the characteristics of the photovoltaic device that can only be installed outdoors (mountain, field, etc.) throughout the four seasons, the viscosity of the hydraulic oil of the hydraulic cylinder 310 increases as the temperature decreases in winter. The greater the viscosity, the worse the operability of the hydraulic fluid, and the mechanical damage of the hydraulic cylinder 310, as well as lowering the power generation efficiency of the photovoltaic device.

Therefore, in the present invention, as shown in FIG. 4B, the hydraulic oil temperature sensor 331 and the hydraulic oil capable of measuring the temperature of the hydraulic oil in the hydraulic oil tank 330 in the hydraulic oil tank 330. The hydraulic fluid viscosity sensor 332 capable of measuring the viscosity of the and a heater 333 for heating the hydraulic fluid is further included.

That is, when the temperature and viscosity measured by the hydraulic oil temperature sensor 331 and the hydraulic oil viscosity sensor 332 are normal, the heater 333 is not operated. On the other hand, when the temperature measured by the hydraulic oil temperature sensor 331 is lower than the temperature set to the normal range, and the viscosity measured by the hydraulic oil viscosity sensor 332 is higher than the viscosity set to the normal range, the control unit 500 By operating the heater 333 to increase the temperature of the operating oil is controlled to lower the viscosity of the operating oil to the set normal range.

On the other hand, when the temperature measured by the hydraulic oil temperature sensor 331 is within the set normal range, or the viscosity measured by the hydraulic oil sensor 332 is outside the set normal range, in this case, the quality of the hydraulic oil itself is a problem There is a high possibility.

Therefore, in this case, the controller 500 controls the drive motor 320 so that the hydraulic cylinder 310 does not operate, thereby preventing mechanical damage of the hydraulic cylinder 310 by the hydraulic oil. In this case, the controller 500 may notify the administrator of an abnormality of the working oil through an alarm device (not shown) or a display device (not shown).

In addition, on one side of the upper frame 200, as shown in Figures 1 and 3, there is provided a wind speed sensor 160 that can be measured to the outside of the wind intensity of the area exposed to the solar power generation system is installed outside Doing. However, since the wind speed sensor 160 may measure the intensity of the wind in the surrounding area, the position where the wind speed sensor 160 is provided is not necessarily limited thereto.

Next, as shown in (a) of FIG. 5, the rotation driver 400 is connected to the lower side of the lower pillar 300 to turn the lower pillar 300 in a horizontal direction to turn table 440. And, the lower pillar 300 includes a rotary joint 410 connecting the lower pillar 300 and the turntable 440 so that the 360 ° infinite rotation, the rotary joint 410 is an anti-rotation stopper ( Rotation is limited by 420.

That is, the turntable 440 provided on the structure 460 by the fixing member 450 is driven in a hydraulic manner by the hydraulic oil supplied from the hydraulic oil tank 310, and the lower column by the rotary joint 410. By connecting the 300 and the turntable 440, the lower pillar 300 may be rotated by 360 °.

As such, the lower pillar 300 may be rotated 360 ° by the turntable 440, thereby horizontally supporting the upper frame 200 and the solar light collecting plate 100 supported by the lower pillar 300. 360 ° rotation in the direction is possible.

That is, since the solar light collecting plate 100 can be rotated 360 ° in the horizontal direction, the solar light collecting plate 100 can generate power by tracking the position of the sun from sunrise to sunset according to the diurnal motion of the sun. Will be.

In particular, even when the day is long and the night is short, such as summer, the solar light collecting plate 100 can be developed by tracking the position of the sun from sunrise to sunset. That is, since it can move by a short distance when returning to the position facing the sunlight at sunrise), the power consumed to rotate the solar light collecting plate 100 can be reduced.

In addition, the rotation drive unit 400 of the present invention preferably further includes a rotation reducer 430. At this time, as shown in (b) of FIG. 5, the gear 431 of the rotation reducer 430 meshes with the gear 441 of the turntable 440, so that a large torque (force) is achieved even with the use of a small motor. To be delivered.

Next, as shown in Figure 6, based on the amount of light measured by the light tracking sensor unit 120, the solar tracking by the control unit 500 and the solar light collecting plate 100 to the sunlight It describes the tilt angle adjustment and the rotation in the horizontal direction with respect to the ground of the solar light collecting plate 100 to face vertically.

First, as described above, the light tracking sensor unit 120 is installed on the surface of the solar light collecting plate 100 and has the same inclination angle as that of the solar light collecting plate 100.

In addition, the light tracking sensor unit 120, as shown in Fig. 6 (a), and the first light amount sensor unit 121 and the second light amount sensor unit 122 facing each other in the vertical direction, left and right, And a third light quantity sensor unit 123 and a fourth light quantity sensor unit 124 facing each other in the direction.

The first light amount sensor 121 is inclined from an upper side than the first light amount sensor 121b for sensing the amount of light incident from sunlight and the sun light S1 perpendicularly incident to the first light amount sensor 121b. And a first cap 121a which blocks a part or all of the incident sunlight S2, and the second light quantity sensor unit 122 senses the amount of light incident from the sunlight. And a second cap 122a which blocks a part or all of the sunlight S3 that is inclined downward from the sunlight S1 that is perpendicularly incident to the second light quantity sensor 122b. The third light amount sensor unit 123 may include a third light amount sensor 123b for sensing the amount of light incident from sunlight and a sunlight S5 perpendicular to the third light amount sensor 123b. The third cap 123a which inclines from the left side to block part or all of the incident sunlight S2 The fourth light quantity sensor unit 124 includes a fourth light quantity sensor 124b for sensing the amount of light incident from the sunlight and a sunlight incident perpendicularly to the fourth light quantity sensor 124b. It comprises a fourth cap 124a for blocking part or all of the sunlight (S4) inclined from the right side than S5).

First, referring to FIG. 6 (b), the relationship between the first light amount sensor unit 121 and the second light amount sensor unit 122 facing each other in the up and down direction will be described. 121b) and the second light quantity sensor 122b, that is, when incident perpendicularly to the light tracking sensor unit 120, both the first light quantity sensor 121b and the second light quantity sensor 122b are the same. (S1) is confronted, thus receiving the same amount of light.

On the other hand, when the sunlight (S2) is inclined from the upper side than the sunlight (S1) that is incident perpendicularly to the light tracking sensor unit 120, the first cap 121a of the first light amount sensor unit 121 Part or all of the sunlight S2 incident to the first light amount sensor 121b is blocked, but since the amount of light of the sunlight S2 is received by the second light amount sensor 122b as it is, The amount of light measured by the first light amount sensor 121b is smaller than the amount of light measured by the second light amount sensor 122b.

On the other hand, when the sunlight (S3) is inclined from the lower side than the sunlight (S1) that is incident perpendicularly to the light tracking sensor unit 120, by the second cap 122b of the second light amount sensor unit A part or all of the sunlight S3 incident to the second light amount sensor 122b is blocked, but since the light amount of the sunlight S3 is received intact by the first light amount sensor 121b, the first light amount sensor The amount of light measured at 121b is greater than the amount of light measured at the second light amount sensor 122b.

In addition, referring to FIG. 6 (c), the relationship between the third light quantity sensor unit 123 and the fourth light quantity sensor unit 124 facing each other in the left and right directions, the sunlight S5 may be the third light quantity sensor ( 123b and the fourth light amount sensor 124b, that is, when incident perpendicularly to the light tracking sensor unit 120, both the third light amount sensor 123b and the fourth light amount sensor 124b are the same. (S5) is confronted, thus receiving the same amount of light.

On the other hand, when the sunlight (S2) is inclined from the left side than the sunlight (S5) that is incident perpendicularly to the light tracking sensor unit 120, the third cap (123a) of the third light amount sensor unit 123 Although a part or all of the sunlight S2 incident to the third light amount sensor 123b is blocked by the light source, the light amount of sunlight S2 is received by the fourth light amount sensor 124b as it is. The amount of light measured by the third light amount sensor 123b is smaller than the amount of light measured by the fourth light amount sensor 124b.

On the other hand, when the sunlight (S4) is inclined from the right side than the sunlight (S5) that is incident perpendicularly to the light tracking sensor unit 120, by the fourth cap (124b) of the fourth light amount sensor unit Although a part or all of the sunlight S4 incident to the fourth light amount sensor 124b is blocked, the third light amount sensor 123b receives the light amount of the sunlight S4 as it is. The amount of light measured at 123b is greater than the amount of light measured at the fourth light amount sensor 124b.

That is, as the difference in the amount of light received by the first light amount sensor 121b and the second light amount sensor 122b is larger, the third light amount sensor 123b and the fourth light amount sensor 124b are also received. The greater the difference in the amount of light is, the more the solar light collecting plate 100 means that the inclination with respect to sunlight.

In addition, when the incident angle of sunlight to the solar light collecting plate 100 is vertical, the maximum power generation efficiency can be expected, the first light amount sensor 121b, the second light amount sensor 122b, the third light amount The greater the difference in the amount of light received by the sensor 123b and the fourth light amount sensor 124b, the lower the power generation efficiency.

In this case, the control unit 500 controls the driving of the hydraulic cylinder 310 so as to minimize the difference in the amount of light sensed by the first light amount sensor 121 and the second light amount sensor unit 122 facing each other in the vertical direction. Meanwhile, the driving of the turn table 440 is controlled to minimize the difference in the amount of light sensed by the third light amount sensor 123 and the fourth light amount sensor 124 facing each other in the left and right directions.

That is, the control unit 500 may minimize the difference in the amount of light received from the first light amount sensor 121b, the second light amount sensor 122b, the third light amount sensor 123b and the fourth light amount sensor 124b. In order to control the driving of the hydraulic cylinder 310 and the turntable 440, the solar light collecting plate 100 is adjusted to face the sunlight perpendicularly to maximize power generation efficiency.

Next, the inclination angle adjustment of the solar light collecting plate 100 by the control of the control unit 500 will be described with reference to FIG. 7 in order to respond to changes in nature such as typhoon or heavy snow.

FIG. 7A illustrates a state in which the solar light collecting plate 100 is inclined to face sunlight, and (b) shows a state in which the solar light collecting plate 100 is parallel to the ground (horizontal plane). (C) shows a state in which the solar light collecting plate 100 is folded to be perpendicular to the ground (horizontal plane).

In addition, as described above, the photovoltaic power generation system of the present invention includes a load sensor 130, a rain sensor 150, and a wind speed sensor 160.

First, the load sensor 130 is a sensor mainly prepared for heavy snow in winter, preferably provided for each module 110 of the solar light collecting plate (100).

That is, when the solar light collecting plate 100 is inclined as shown in (a) of FIG. 7 or unfolded as shown in (b), unexpected snowfall is accumulated on the solar light collecting plate 100. The load by the eye measured by the sensor 130 is sensed.

In this case, when the load measured by the load sensor 130 exceeds the set range (for example, the range that the upper frame 200 supporting the solar light collecting plate 100 can withstand), the control unit ( The control panel 500 controls the solar light collecting plate 100 to be perpendicular (or close to vertical) with respect to the ground (horizontal plane) as shown in FIG. 7C.

As such, by folding the solar light collecting plate 100 perpendicularly (or close to vertically) with respect to the ground (horizontal plane), not only the snow accumulated on the solar light collecting plate 100 can be removed, but also the solar light. Even when snow accumulated on the light collecting plate 100 is frozen and not removed, the upper frame 200 is damaged or deformed because the upper frame 200 is not subjected to a load by snow accumulated on the solar light collecting plate 100. Can be prevented.

In addition, the wind speed sensor 160 is a sensor for strong winds such as typhoons.

That is, when a strong wind blows, such as a typhoon, the solar light collecting plate 100 is inclined as shown in FIG. 7 (a), or folded in a state perpendicular to the ground (horizontal plane) as shown in (c). Since the surface of the light collecting plate 100 faces the strong wind, the upper frame 200 may be damaged or deformed under strong pressure.

Therefore, when the wind intensity measured by the wind speed sensor 160 exceeds a set range (for example, a range that the upper frame 200 supporting the solar light collecting plate 100 can withstand), As shown in FIG. 7B, the controller 500 controls the solar light collecting plate 100 to be in a state in which the solar light collecting plate 100 is unfolded in parallel with the ground (horizontal plane).

As described above, the solar light collecting plate 100 is laid out in parallel with the ground (horizontal surface) to minimize the surface of the upper frame 200 facing the wind, so that the upper frame 200 is exposed to strong winds. This can be prevented from being broken or deformed.

Next, the rain sensor 150 is a sensor for measuring the amount and intensity of rain water falling on the solar light collecting plate 100, the sensor for responding to the rainy weather.

In general, the upper frame 200 is rarely damaged or deformed by rain. Rather, if a certain degree of rain falls, the dust and dirt accumulated in the solar light collecting plate 100 by the rain is removed, and after the rain has a positive effect that can increase the power generation efficiency.

 Therefore, when the amount or intensity of the rain measured by the rain sensor 150 exceeds a set range (for example, the amount of rain falling on the solar light collecting plate 100, the hourly precipitation is 10mm or more), the controller 500, the solar light collecting plate 100 is controlled to repeat the folding and unfolding process.

As such, while raining, the solar light collecting plate 100 is repeatedly folded and unrolled, and dust and dirt accumulated in the solar light collecting plate 100 can be efficiently removed.

Next, a cooling system 600 for cooling each solar module 110 constituting the solar light collecting plate 100 will be described.

As described above, when the amount of insolation increases, the power generation efficiency decreases while the surface temperature of the photovoltaic module 110 rises. It is known.

Therefore, when the surface temperature of the module of the solar light collecting plate 100 measured by the temperature sensor 140 exceeds a predetermined temperature (for example, 40 ℃) to cool the module of the solar light collecting plate 100 need.

As shown in FIGS. 8 and 9, the cooling system 600 according to the present invention includes an air supply unit 610 that draws in and supplies externally cooled air, and air supplied from the air supply unit 610. A main flow path 620 to which the gas flows, a plurality of branch flow paths 630 for supplying air from the main flow path 620, and a lower side of each of the solar modules 110. A plurality of cooling modules 640 positioned to supply air supplied from the branch flow path 630 to the bottom surface of the photovoltaic module 110 to cool the photovoltaic module 110, and the branch flow path 630. It is formed in a plurality of injection nozzles 631 for injecting air to the surface of the solar module 110.

That is, as shown in (a) of FIG. 8, the cooling module 640 is provided below each of the solar modules 110, the upper surface of each of the solar modules 110, A plurality of injection nozzles 631 formed in the branch flow path 630 are exposed in a direction parallel to the surface of the solar module 110.

Specifically, referring to (b) of FIG. 8, the photovoltaic module 110 has an edge thereof supported by the support frame 111, and the cooling module 640 below the support frame 111. Will be located.

The cooling module 640 has a box shape having the same size and shape as the photovoltaic module 110, and a plurality of air is provided on an upper surface of the cooling module 640 facing the bottom surface of the photovoltaic module 110. The hole 641 is penetrated, and a connector 642 for connecting with the branch flow path 630 is formed on a side of the cooling module 640 facing the branch flow path 630.

In addition, the connector 632 is formed at a position where the connector 642 of the cooling module 640 is connected to the branch passage 630, such that the connector 642 and the branch passage 630 of the cooling module 640 are formed. The connector 632 of the coupling is coupled to each other.

In addition, the injection nozzle 631 of the branch flow path 630, when the cooling module 640 provided on the lower side of the solar module 110 is coupled to the branch flow path 630, the solar module ( It is formed in the branch flow path 630 to be in close contact with the surface of the 110.

By such a structure, when the surface temperature of the photovoltaic module 110 measured by the temperature sensor 140 exceeds the set temperature, the air supply unit 610 is controlled by the control unit 500 to the outside cooling Supplied to the air, and the air supplied by the air supply unit 610 passes through the main flow path 620 and the branch flow path 630, and part of the photovoltaic module 110 by the injection nozzle 631. Sprayed onto the surface of the solar module 110 to cool the surface of the solar module 110, while a portion of the solar module 110 moves to the cooling module 640 and is supplied to the lower surface of the solar module 110 through the air hole 641. .

As such, the air supplied to the lower surface of the solar module 110 via the cooling module 640 is spaced in the space of the solar module 110 and the cooling module 640 by the support frame 111. While cooling, the solar module 110 is cooled.

At this time, since the support frame 111 does not completely seal the space between the solar module 110 and the cooling module 640, the air heated in the process of cooling the solar module 110 is external As the new cooling air enters, the cooling process of the photovoltaic module 110 is continued.

The air cooling system 600 of the present invention has the following advantages over the conventional water cooling type. In the case of the conventional water cooling type, when the supply of cooling water is difficult depending on the location conditions, the cooling system can be operated. In the case of the present invention, external air that is supplied indefinitely (if necessary, it is possible to create an underground space facility to supply the cooled air from the underground space, or draw the cooled air from the surrounding mountain areas, etc.). There are few restrictions depending on the location conditions.

In the cooling system 600 of the present invention, when the lower pillar 300 and the upper frame 200 are formed in a tubular shape having a hollow portion, they are used as the main flow passage 620 and the branch flow passage 630. The manufacturing cost of the photovoltaic power generation system can be reduced.

In addition, as illustrated in FIG. 9, an opening / closing valve 633 controlled by the controller 500 is provided between the main flow path 620 and each of the branch flow paths 630 to provide the solar light collecting plate ( Some of the photovoltaic module 110 line 100 may be supplied to supply cooled air.

That is, as shown in Figure 1, by providing a temperature sensor 140 in each of the solar modules 110, to measure the surface temperature for each solar module 110, the temperature sensor 140 The cooling air may be supplied only to some of the solar module 110 lines in a stepwise or alternative manner according to the priority based on the temperature measured by.

100 solar collector 110 solar module
120 Light Tracking Sensor 130 Load Sensor
140 Temperature Sensor 150 Rain Sensor
200 upper frame 210 hinge
300 Lower Pillar 310 Hydraulic Cylinder
320 Drive Motor 330 Oil Tank
400 Rotary Drive 410 Rotary Joint
420 Anti-Rotation Stopper 430 Rotary Reducer
431 gear of rotary reducer 440 turntable
Gear control on the turntable 441
600 Cooling System 610 Air Supply
620 weeks euro 630 quarter euro
640 cooling module

Claims (5)

Solar condensing plate consisting of a plurality of solar modules,
An upper frame for supporting the solar light collecting plate,
A lower column connected to a lower center of the upper frame and supporting the upper frame;
Is provided on the lower side of the lower column includes a rotation drive for rotating the upper frame connected to the lower column in a horizontal direction,
The upper frame is rotatably connected in the vertical direction with respect to the lower pillar,
The lower pillar includes a hydraulic cylinder connected to the front surface of the lower pillar and the front lower surface of the upper frame and connected to a hydraulic oil tank for adjusting the inclination angle of the upper frame.
The rotation drive unit, biaxially tracked photovoltaic power generation system, characterized in that for rotating the upper frame connected to the lower pillar by hydraulic pressure 360 ° in the horizontal direction. The method of claim 1,
The rotation drive unit includes a turntable connected to the lower pillar,
The turntable is connected to the lower pillar is a biaxial tracking solar power system, characterized in that connected by a rotary joint. The method according to claim 1 or 2,
A control unit for controlling the driving of the hydraulic cylinder and a light tracking sensor unit provided on the surface of the solar light collecting plate,
The light tracking sensor unit includes a first light quantity sensor unit and a second light quantity sensor unit facing each other in the up and down direction, and a third light quantity sensor unit and the fourth light quantity sensor unit facing each other in the left and right directions,
The first light amount sensor unit may be configured to block a part or all of the first light amount sensor that senses the amount of light incident from the sunlight and the sun light that is inclined from an upper side than the sun light that is perpendicularly incident to the first light amount sensor. 1 cap is made,
The second light quantity sensor unit may be configured to block a part or all of the second light quantity sensor which senses the amount of light incident from the sunlight and the sun light which is inclined downward from the sun light incident perpendicularly to the second light quantity sensor. Including a cap,
The third light quantity sensor unit may include a third light quantity sensor for sensing an amount of light incident from sunlight, and a part of blocking all or part of sunlight that is inclined at a left side than sunlight that is horizontally incident with respect to the third light quantity sensor. 3 caps are made,
The fourth light amount sensor unit may block a part or all of the fourth light amount sensor for sensing the amount of light incident from sunlight and the sun light which is inclined from the right side of the fourth light amount sensor at a right angle to the fourth light amount sensor. Including the cap,
The controller, when there is a difference in the amount of light measured by the first light amount sensor and the second light amount sensor, the drive of the hydraulic cylinder so that the difference between the amount of light measured by the first light amount sensor and the second light amount sensor can be minimized To control,
When there is a difference in the amount of light measured by the third light amount sensor and the fourth light amount sensor, the turntable driving is controlled to minimize the difference between the amount of light measured by the third light amount sensor and the fourth light amount sensor Biaxial tracking solar power system. The method of claim 3,
The load sensor for measuring the load acting on the module of the solar light collecting plate, the wind speed sensor for measuring the intensity of the wind in the surrounding area, and the rain sensor for measuring the amount and intensity of rain water falling on the solar light collecting plate Including,
The control unit,
When the load measured by the load sensor exceeds the set range, the driving of the hydraulic cylinder is controlled so that the solar light collecting plate is perpendicular to the horizontal plane,
When the wind intensity measured by the wind speed sensor exceeds a set range, the driving of the hydraulic cylinder is controlled so that the solar light collecting plate is spread side by side with respect to a horizontal plane,
When the amount of the ratio measured by the rain sensor exceeds the set range, the two-axis tracking, characterized in that for controlling the drive of the hydraulic cylinder to repeat the process that the solar light collecting plate is perpendicular to the horizontal plane and spread side by side Solar power system. The method of claim 3,
And a temperature sensor for measuring the surface temperature of the solar module of the solar light collecting plate, and a cooling system controlled by the controller.
The cooling system,
An air supply unit which draws in and supplies externally cooled air,
A main flow path through which the air supplied from the air supply unit moves;
A plurality of branch passages for supplying air from the main passage to the photovoltaic module;
A plurality of cooling modules positioned under each of the solar modules of the solar light collecting plate and supplying air supplied from the branch passage to the lower surface of the solar module to cool the solar modules;
Is formed in the branch flow path comprises a plurality of injection nozzles for injecting air to the surface of the solar module,
When the surface temperature of the photovoltaic module measured by the temperature sensor exceeds the set temperature, the biaxial tracking photovoltaic power generation system characterized in that for supplying the outside air cooled by the air supply unit under the control of the controller.

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