KR102463436B1 - solar power system that tracks sunlight by converting linear motion into rotational motion - Google Patents

Abstract

Disclosed is a solar power generation system to track sunlight by converting linear motion into rotational motion. The solar power generation system comprises: a plurality of solar panels which are arranged in a plurality of columns and rows; group tracking controllers which are physically connected to the solar panels, to provide power for rotational movement of each of the solar panels; and a central control server which controls the rotational movement by transmitting a control command to each of the group tracking controllers.

Description

A solar power system that tracks sunlight by converting linear motion into rotational motion

The present invention relates to a photovoltaic power generation system, and more particularly, to a photovoltaic power generation system that tracks sunlight in a manner that converts linear motion into rotational motion.

As a part of solving the environmental pollution problem caused by energy production, social interest in the development of eco-friendly alternative energy using solar energy is increasing. Power generation using solar energy is divided into solar power generation that uses solar cells to generate power through solar heat and solar power generation that uses solar light to generate power.

In the past, solar power generation was mainly a fixed type in which a solar panel was installed in a fixed position and the direction could not be adjusted according to the position of the sun. A tracking method (or tracker method) that tracks according to the altitude and azimuth of

As such, in the case of the tracking type in which the direction of the solar panel is adjusted in real time by tracking the change in the position of the sun, the sunlight is set to be vertically incident on the solar panel according to the position of the sun in order to maximize power generation efficiency.

However, when set to maintain normal incidence in this way, since the solar panels installed at regular intervals face the same direction according to the position of the sun according to time, a shadow may occur between adjacent solar panels.

In addition, when a photo sensor is installed for each photovoltaic panel individually and configured to track the sun, each of the photovoltaic panels can be installed very frequently due to the occurrence of shading that occurs frequently in real time according to the movement of clouds or various external environmental factors. direction is regulated.

Therefore, in this case, the life span and damage of equipment may occur due to frequent adjustment operations, and the increase in energy consumption according to the control often acts as a factor to decrease power generation efficiency.

An object of the present invention for solving the above problems is to provide a solar power generation system for tracking sunlight in a manner that converts linear motion into rotational motion.

One aspect of the present invention for achieving the above object provides a solar power generation system for tracking sunlight in a manner that converts a linear motion into a rotational motion.

The photovoltaic system includes a plurality of photovoltaic panels arranged in a plurality of columns and rows; Group tracking control units that are physically connected to the solar panels to provide power for the rotational motion of each of the solar panels; and a central control server for controlling the rotational movement by transmitting a control command to each of the group tracking controllers.

Each of the rows indicates solar panels arranged to be spaced apart from each other by a predetermined distance in the east-west direction.

Each of the plurality of solar panels, a plurality of solar panels disposed on a main frame; an auxiliary frame coupled to the rear surface of the main frame and including a rotating shaft; a support member physically connected to the auxiliary frame via the rotation shaft and vertically fixed to the ground to support a physical load; a solar sensor installed on the main frame to measure the amount of light; and a wire-type thermal sensor installed to pass through the solar panels to measure the amount of heat.

The central control server generates learning data by collecting the amount of light, the amount of heat, local weather around the place where the solar panels are installed, and the amount of power generation decrease according to the local weather, and based on the generated learning data An artificial neural network is supervised, and the predicted power generation amount of each of the solar panels is determined using the supervised artificial neural network.

The central control server, the operation of controlling the rotation angle of each of the solar panels so that sunlight is incident vertically; determining whether a shaded area exists in the solar panels belonging to each of the columns; and when the shaded area exists, a rotation angle is determined to sequentially remove the shaded area from the easternmost column among the columns.

Each of the group tracking control units corresponds to each of the rows 1:1, and operates the rotational motion of the solar panels belonging to the corresponding row at the same rotation angle.

In the case of using the solar power generation system that controls solar tracking based on big data according to the present invention as described above, it is possible to maximize power generation efficiency by minimizing shadows that may occur between adjacent solar panels.

In addition, there is an advantage in that it is possible to prevent a decrease in the lifespan of equipment and maintain power generation efficiency by preventing frequent operations that may occur due to cloud movement or temporary external environmental changes.

In addition, based on big data, the predicted power generation amount is determined using the amount of light, heat, etc. as an index, and the optimal rotation angle between adjacent solar panels is determined according to the predicted power generation amount, so as data is accumulated, very accurate sunlight tracking control is possible.

1 is a conceptual diagram for explaining the structure of a solar panel according to an embodiment.
2 is a conceptual diagram for explaining a shading problem occurring in a photovoltaic system according to an embodiment.
FIG. 3 is a conceptual diagram for explaining an embodiment for maximizing power generation efficiency in consideration of shading according to FIG. 2 .
4 is a configuration diagram of a solar power generation system for controlling solar tracking based on big data according to an embodiment.
5 is a conceptual diagram for explaining a structure of a solar panel according to an embodiment.
6 is a diagram for explaining a process of calculating a ratio of a shaded area in a central control server.
7 is a flowchart exemplarily illustrating a control operation of a central control server according to an embodiment.
8 is a diagram exemplarily illustrating a hardware configuration of a central control server according to an embodiment.

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention. In describing each figure, like reference numerals have been used for like elements.

Terms such as first, second, A, and B may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being “connected” or “connected” to another component, it may be directly connected or connected to the other component, but it is understood that other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It is to be understood that this does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

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

1 is a conceptual diagram for explaining the structure of a solar panel according to an embodiment.

Referring to FIG. 1 , the solar panel 200 includes a plurality of solar panels 210 disposed on the main frame 220 , coupled to the rear surface of the main frame 220 and including an auxiliary axis of rotation AXIS. The frame 230 and the support member 240 physically connected to the auxiliary frame 230 via the axis of rotation AXIS and fixed perpendicular to the ground to support a physical load may be included. The main frame 220 and the auxiliary frame 230 may be configured as separate members, but may be integrally configured according to embodiments.

Each of the solar panels 210 may be disposed on the main frame 220 in the form of a grid.

The solar panel 200 may further include a rotation control unit 250 that rotates the main frame 220 or the auxiliary frame 230 by the rotation angle AGL about the rotation axis AXIS.

The rotation angle AGL may be defined as a value measured in a clockwise direction between the support member 240 fixed to the ground and the main frame 220 or the auxiliary frame 230 .

The rotation control unit 250 includes a connecting member 251, a connecting member 251 and a second rotating shaft AXIS2 that connects the auxiliary frame 230 and the front and rear driving shaft 252 to each other via the rotating shaft AXIS. It may include a power member 253 for providing power for a linear motion of the front-rear drive shaft 252 connected to the front and rear drive shaft 252 in a linear motion in a direction parallel to the ground. For example, the power member 253 may be a power cylinder.

The connecting member 251 may convert a linear motion of the front and rear drive shaft 252 into a rotational motion of the auxiliary frame 230 . Specifically, when the front and rear drive shaft 252 is moved through a linear motion in the west direction, one end of the connection member 251 is pulled in the west direction through the second rotation shaft AXIS2, and the attractive force due to this is the rotation axis AXIS. to rotate counterclockwise. Conversely, when the front and rear drive shaft 252 is moved through a linear motion in the east direction, one end of the connecting member 251 is pushed out in the east direction through the second rotation shaft AXIS2, and the repulsive force caused by this moves the rotation shaft AXIS. to rotate clockwise.

In this case, the connecting member 251 may be configured to have a variable length so as to stably convert a linear motion into a rotational motion. For example, when one end of the connecting member 251 is pulled in the west direction through the second rotation shaft AXIS2, the length of the connecting member 251 is increased by a preset length, and one end of the connecting member 251 is When it is pushed out in the east direction through the second rotation shaft AXIS2, the length of the connecting member 251 may be reduced again by a preset length. To this end, the connecting member 251 may be configured to have a variable length by inserting or withdrawing an extension member (not shown) corresponding to a preset length into the connecting member 251 .

Meanwhile, although not shown in the drawings, in an embodiment, the rotation control unit 250 may be implemented as a motor that is physically connected to the rotation shaft AXIS to rotate the rotation shaft AXIS. That is, the main frame 210 and the auxiliary frame 220 may be configured to rotate as the rotation shaft AXIS is directly rotated by the rotational force of the rotation controller 250 .

The sun moves from east to west every day in the circumferential direction, and accordingly, the surface of the main frame 220 on which the solar panel 210 is disposed is positioned perpendicular to the sun (hereinafter may be referred to as a direct lunar position) This is most advantageous for power generation efficiency.

Accordingly, according to the circumference of the sun, the main frame 220 and the auxiliary frame 230 may be controlled to rotate clockwise to maintain a direct solar position that can receive sunlight vertically around the rotation axis AXIS. .

In addition, the front and rear drive shaft 252 may be disposed in the east-west direction so that the solar panel 200 is rotated in the clockwise direction to maintain the direct sunlight position.

2 is a conceptual diagram for explaining a shading problem occurring in a photovoltaic system according to an embodiment. FIG. 3 is a conceptual diagram for explaining an embodiment for maximizing power generation efficiency in consideration of shading according to FIG. 2 .

Referring to FIG. 2 , a case in which the solar panels 200 are arranged in the east-west direction to follow the circumferential direction of the sun is illustrated.

In this case, the solar panels 200 may be arranged in a plurality of columns C1 to Cn and rows to form a group of the solar panels 200 for each column.

For convenience of description in the present specification, each of the rows indicates the solar panels 200 are spaced apart from each other by a predetermined spacing gap (GAP) in the east-west direction, and each of the columns (C1 ~ Cn) is each other in the north-south direction. It may be defined as indicating the solar panels 200 spaced apart. In this case, the spacing GAP may be a spacing along the east-west direction.

For example, in FIG. 2 , the solar panel 200 disposed in the easternmost part may belong to the first group corresponding to the first row C1 , and the solar panel 200 disposed in the westernmost part may belong to the third group. It may be a third group corresponding to the column C3.

On the other hand, when the GAP is very large, even if the solar panels 200 rotate along the circumferential direction of the sun, the solar panel belonging to the front row does not cause a shadow on the solar panel belonging to the rear row. However, it is difficult in practice to designate a large gap (GAP) because a very large installation area is required.

Therefore, the GAP is often installed below a certain level, and as a result, shading occurs between adjacent columns (more precisely, between photovoltaic panels 200 adjacent to each other in the same row). do. In particular, shadows rarely occur at noon, when the sun sets, but in the morning or in the late afternoon before the sun sets, the elevation angle at which the sun is incident (the angle measured in the direction of the sun with respect to the ground) is small. The smaller the gap GAP is, the larger the shading occurs, and there is a problem in that power generation efficiency is lowered due to the shading.

As an embodiment for solving the shading problem, backtracking control may be possible to control the rotational direction of the solar panel 200 to rotate by a predetermined angle in the reverse direction to the circumferential direction of the sun.

That is, the photovoltaic panels 200 belonging to the same row as shown in FIG. 2 may share the same front/rear drive shaft 252, and a single power member 253 for linear motion of the shared front/rear drive shaft 252. ) can be installed. In this case, since only one power member 253 can be controlled to control the rotational motion of all the solar panels 200 belonging to the same row, there is an advantage in convenience of control and reduction of construction cost.

On the other hand, in this case, after performing the following control to rotate the solar panels 200 belonging to the same row to correspond to the direct lunar position of the sun, the circumferential direction of the sun by a certain reference angle by a single power member 253 Backtracking control can be performed to remove shadows generated between the photovoltaic panels 200 adjacent to each other in the same row by rotating the same in the reverse direction (direction moving from east to west).

However, when the backtracking control is performed in the above-described manner, all the solar panels 200 are configured to give up the direct sunlight position in order to remove the shadow, and the reduction in power generation efficiency due to abandoning the direct solar radiation position is a trade-off. acts as

In addition, if the gap GAP is smaller than a predetermined reference value, the shadow is necessarily generated because the shadow cannot be completely removed only by the backtracking control.

Therefore, in another embodiment of the present invention, based on the rotation angle (AGL) of the solar panel 200 belonging to the front row with respect to the solar panels 200 belonging to the same row as in FIG. 3, The rotation angle AGL of the solar panel 200 belonging to the rear row immediately adjacent to the front row may be controlled.

For example, among the photovoltaic panels 200 belonging to the same row, the photovoltaic panel 200 belonging to the first column C1 or the frontmost column (the easternmost column) is set at the first rotation angle ALG1 ) and control the solar panel 200 belonging to the second row C2 adjacent to the first row C1 to a second rotation angle AGL2 greater than the first rotation angle AGL1, and the second The solar panel 200 belonging to the third row C3 adjacent to the row C2 may be controlled at a third rotation angle AGL3 greater than the second rotation angle AGL1 .

Here, the first rotation angle AGL1 may be an angle determined so that the surface constituting the solar panel 210 is perpendicular to the sunlight (ie, an angle determined such that the incident angle of sunlight is 90 degrees), and the elevation angle of the sun can be determined arithmetically. The elevation angle of the sun may be determined according to the location, date, and time of the region where the solar panel 200 is installed, and the arithmetic formula for determining the rotation angle at which the sunlight can be vertically incident according to the elevation angle is a conventional Since the technician can easily set it with reference to the known technology, a detailed description thereof will be omitted.

The second to third rotation angles AGL1 to 3 may be angles at which shadows do not occur in the solar panel 200 . Here, the angle at which the shadow does not occur should be set to be larger than the rotation angle located in the front row of the user, and may be determined by an arithmetic expression according to the elevation angle of the sun, and a specific method will be described later.

On the other hand, when the separation distance GAP is smaller than a predetermined reference value, there may not be an angle at which a shadow does not occur. In this case, it is important to determine the trade-off point between the power generation loss due to the shaded area, which is the area shaded by the solar panels in the adjacent front row, and the amount of power generation according to the sunlight incident angle of the power generation area, which is the remaining area other than the shaded area. It is advantageous.

That is, if the shaded area is minimized, the power generation area is widened to increase the power generation efficiency, but since the rotation angle AGL must be controlled so that the angle of incidence of sunlight is lower than 90 degrees, the amount of power generated per unit area of the power generation area is reduced. Therefore, a method for providing optimal power generation efficiency by clearly setting a trade-off point between reducing the shaded area and maintaining the incident angle of sunlight as close to 90 degrees as possible in the power generation area should be provided.

In one embodiment of the present invention, in order to clarify the trade-off point between the size of the shaded area and the power generation efficiency per unit surface of the power generation area, the power generation efficiency according to the area ratio of the shaded area is configured as a data table based on big data. and a method of determining the rotation angle (AGL) corresponding to the optimal size of the shaded area by referring to the configured data table is also provided.

4 is a configuration diagram of a solar power generation system for controlling solar tracking based on big data according to an embodiment.

Referring to FIG. 4 , the solar power generation system for controlling solar tracking based on big data according to an embodiment includes a plurality of solar panels 200 arranged according to a plurality of columns C1 to Cn and rows. ; Group tracking control units 300 that are physically connected to the solar panels 200 to provide power for the rotational motion of each of the solar panels 200; And it may include a central control server 100 for controlling the rotational movement by transmitting a control command to each of the group tracking control unit (300).

Each of the rows indicates the solar panels 200 that are spaced apart from each other by a predetermined distance GAP in the east-west direction, and each of the columns C1-Cn are spaced apart from each other in the north-south direction. ) can be indicated.

Each of the group tracking control units 300 may correspond to each of the columns C1 to Cn 1:1, and may operate the rotational motion of the solar panels 200 belonging to the corresponding column at the same rotation angle.

For example, the group tracking control unit 300 physically connected to the first row C1 may simultaneously operate the rotational motions of the solar panels 200 belonging to the first row C1 to have the same rotation angle. .

In the same way, the group tracking control unit 300 physically connected to the second row C2 may simultaneously operate the rotational motions of the solar panels 200 belonging to the second row C2 at the same rotation angle.

To this end, the group tracking control unit 300 may be physically connected to all of the front and rear drive shafts 252 of each of the solar panels 200 belonging to the corresponding row, and may be composed of one or more power cylinders.

As another example, the group tracking control unit 300 is connected to the motor-type rotation control unit 250 included in each of the solar panels 200 by wire to simultaneously perform the rotational movement of the rotation control unit 250 at the same rotation angle. can be controlled

That is, the group tracking control unit 300 is configured to control the rotation angle of the solar panels 200 belonging to the same column, not the same row as shown in FIG. 2 , so that two different group tracking control units ( 300) can be used to control the rotation angle of the front row and the rear row located just behind the front row differently.

Meanwhile, here, the group tracking control unit 300 has been illustrated and described as corresponding to each row 1:1, but as necessary, the rotation angle of each of the photovoltaic panels 200 is set at the location where each photovoltaic panel 200 is installed. It is also possible to individually operate each according to the elevation angle of the sun and the rotation angle of the solar panel 200 located in the immediate front row adjacent to the solar panel 200 .

In this case, the group tracking control unit 300 is used in the same concept as the rotation control unit 250 (that is, the motor) included in each of the solar panels 200 , and the central control server 100 is the solar panel 200 . The rotation angle can be individually controlled by transmitting a control command remotely (or via a wired network) to the rotation controller 250 (that is, the motor) included in each.

5 is a conceptual diagram for explaining a structure of a solar panel according to an embodiment. 6 is a diagram for explaining a process of calculating a ratio of a shaded area in a central control server.

Referring to FIG. 5 , the solar panel 200 includes a solar sensor 201 installed on the main frame 220 ; And it may further include a wire-type thermal sensor 202 installed to pass through the solar panels 210 installed in a grid type on the main frame 220 .

The solar sensor 201 may measure the amount of light incident on the solar panel 200 .

The wire-type thermal sensor 202 may measure the amount of heat generated by the solar panel 200 .

The central control server 100 is, based on the amount of light measured using the solar sensor 201 and the amount of heat measured using the wire-type thermal sensor 202, the unit area of each of the solar panels 200 (eg, For example, it is possible to determine the predicted power generation per m ² ).

For example, the central control server 100 collects the amount of light and heat in the time between sunrise and sunset of the sun, and calculates the amount of power per unit area according to the collected light and heat by using a linear regression analysis. By analyzing, a linear regression equation for determining the predicted power generation amount can be determined as in Equation 1 below.

In Equation 1, Y` is the predicted power generation amount per unit area according to time between sunrise and sunset, a and b are linear regression coefficients, x1 is the amount of light according to the time between sunrise and sunset of the sun, and x2 is the amount of light generated by the sun It may be the amount of heat over time between sunrise and sunset.

That is, the central control server 100 continuously measures the amount of power generation per unit area according to the amount of light and heat in the time between the sunrise and sunset of the sun (that is, the time according to the change in the elevation angle of the sun) to construct big data and , a linear regression equation according to Equation 1 is determined by analyzing the configured big data using linear regression analysis.

Accordingly, each linear regression equation corresponding to each elevation angle may be specified in the form of Equation 1, and the central control server 100 may determine the predicted power generation amount through the linear regression equation specified here.

On the other hand, the central control server 100 configures big data by collecting the amount of light, heat, local weather records around the installation place, and/or the amount of power generation reduction according to the local weather, and using the configured big data as learning data. An artificial neural network may be supervised and the predicted power generation amount of each of the solar panels may be determined using the supervised artificial neural network.

Local weather records may mean sudden changes in climate, such as clouds, snow, or rain, and may be collected from an external server operated by the Korea Meteorological Administration. In addition, the amount of power generation per unit area may be obtained by collecting the photovoltaic panel 200 in real time, and the amount of power generation reduction may be input from a manager or obtained from an external Meteorological Administration operating server or power plant operating server.

In addition, the central control server 100 determines the ratio of the shaded area to the total area of the solar panel cells 210 according to the elevation angle of the sun using a predefined equation, The ratio of the shaded area according to the time between sunrise and sunset of the sun may be determined by using the transformation of the relationship between the time between sunsets (that is, the time according to the change in the elevation angle of the sun).

Specifically, referring to FIG. 6 , the separation distance GAP between the photovoltaic panels 200 adjacent to each other among the photovoltaic panels 200 belonging to the same row is determined as in Equation 2 below.

Referring to Equation 2, the separation distance GAP is the rotation angle AGL1 of the photovoltaic panel 200 disposed in the front row among the photovoltaic panels 200 adjacent to each other, and the photovoltaic panel 200 disposed in the rear row. ) rotation angle (AGL2), the distance from the rotation axis (AXIS) of the solar panel 200 to one end of the solar panel cell 210 (L), the distance of the shaded area (d), the elevation angle of the sun (SL) and a horizontal distance T of the shaded area to the ground.

In this case, the horizontal distance T of the shaded area to the ground may be determined by Equation 3 below.

That is, by substituting Equation 3 into Equation 2, it is possible to determine the distance d of the shaded area generated in the photovoltaic panel 200 disposed in the rear row among the photovoltaic panels 200 adjacent to each other. When the distance d is 0, if the rotation angle AGL2 of the solar panel 200 disposed in the rear row is obtained, the rotation angle AGL2 for preventing the shading from occurring can also be calculated.

Also, the central control server 100 may determine the ratio of the shaded area to the total area of the solar panel cells 210 by using the distance d of the shaded area as in Equation 4 below.

In addition, by using the transformation of the relationship between the time between sunrise and sunset of the sun (that is, the time according to the change in the elevation angle of the sun) and the elevation angle according to the location where the solar panels 200 are installed, the sunrise and sunset of the sun It is possible to determine the proportion of the shaded area according to time between the two.

At this time, the time between sunrise and sunset of the sun (that is, the time according to the change in the elevation angle of the sun) and the elevation angle according to the location where the solar panels 200 are installed can be calculated using a well-known formula. , it is self-evident that relationship transformation is possible based on these formulas.

The central control server 100 according to an embodiment of the present invention, when the shaded area cannot be avoided (that is, the separation distance GAP is too short to adjust the rotation angles of each of the adjacent solar panels, the shaded area ), the optimal rotation angle between two adjacent solar panels belonging to the same row can be determined.

7 is a flowchart exemplarily illustrating a control operation of a central control server according to an embodiment.

Referring to FIG. 7 , the central control server 100 may first control the rotation angle of each of the solar panels 200 so that sunlight is vertically incident ( S100 ).

For example, in step S100, the central control server 100 determines the elevation angle of the sun based on the location, date and time in which the solar panels 200 are installed, and the sunlight is vertical based on the determined elevation angle. It is possible to determine a rotation angle for the incident to the light, and control the rotation angle of each of the solar panels 200 by the determined rotation angle.

In one embodiment, the central control server 100 may determine the elevation angle of the sun in a manner that provides the location, date and time to an external weather server (not shown), and receives the elevation angle from the weather server.

As another example, the central control server 100 may determine the elevation angle of the sun according to an elevation angle calculation formula input in advance. Here, the altitude angle calculation formula is widely known, so a detailed description thereof will be omitted.

In step S100, the central control server 100 determines a rotation angle for vertically incident sunlight individually for each of the solar panels 200, and uses the determined rotation angle for each of the solar panels 200. The rotation angle can be controlled. However, when the entire area occupied by the solar panels 200 is located within a preset reference area, all of the solar panels 200 may be controlled at the same rotation angle. (In this case, the rotation angle may be determined based on the elevation angle determined based on the central position within the area occupied by the entire solar panel 200 .)

The central control server 100 may determine whether a shaded area exists in the solar panels belonging to each column (S110).

For example, the central control server 100 calculates Equation 3 based on the rotation angle of the first solar panel belonging to the first row and the rotation angle and elevation angle of the second solar panel belonging to the second row disposed in the easternmost column When the distance d of the shaded area determined by substituting in Equation 2 is not 0, it may be determined that the shaded area exists.

If it is determined that the shaded area exists in step S110, the central control server 100 may determine a rotation angle for sequentially removing the shaded area according to the row from the solar panels belonging to the second row (S120).

For example, in step S120, the central control server 100, based on the rotation angle and the elevation angle of the solar panel belonging to the first row, the distance (d) of the shaded area according to Equations 2 and 3 is 0 The rotation angle of the solar panel belonging to the second row can be determined.

In the same way, the central control server 100, based on the rotation angle and elevation angle of the solar panel belonging to the i (i is a natural number greater than or equal to 2 and less than n, n is the total number of columns)-th column, the shaded area The process of determining the rotation angle of the photovoltaic panel belonging to the i+1th column for the distance d to be 0 may be repeated for each column from the second column.

In this case, the rotation angle determined in step S120 may be determined as the same value for the solar panels belonging to the same column. That is, all of the solar panels belonging to the i-th column may be determined to have the same rotation angle.

On the other hand, in this case, as shown in FIG. 3 , when the sun is largely deviated to the east, the i+1th value is the value obtained by adding the correction angle for the distance d of the shaded area to be 0 to the rotation angle of the solar panel belonging to the i-th column. The rotation angle of the solar panel belonging to the row may be determined. That is, in order to remove the shaded area due to the solar panel belonging to the front row, the rotation angle of the solar panel belonging to the immediately following row must be increased by the correction angle to solve the shaded area.

For example, referring back to FIG. 3 above, it is a value obtained by adding a correction angle to the rotation angle AGL1 of the solar panel belonging to the first column C1, and the rotation of the solar panel belonging to the second column C2 The angle (AGL2) is determined, and the rotation angle (AGL3) of the solar panel belonging to the third column (C3) is determined by adding the correction angle to the rotation angle (AGL2) of the solar panel belonging to the second column (C2). can

The central control server 100 may determine whether there is a reference column that cannot avoid the shaded area in step S130 of sequentially determining the rotation angle for each column (S130).

For example, while determining the rotation angle of the third column to be larger than the second column and removing the shaded area by determining the rotation angle of the fourth column to be larger than the third column, the distance (d) of the shaded area in a specific reference column is 0 The rotation angle may not exist.

That is, in step S120, the central control server 100, for the distance d of the shaded area according to Equations 2 and 3 to be 0, the rotation angle of the solar panel belonging to the i+1th column does not exist. In this case, the i+1th column may be determined as a reference row in which the shaded area cannot be avoided.

When it is determined in step S130 that the reference row exists, the central control server 100 sequentially from the solar panels belonging to the reference row to the solar panels belonging to the last rows belongs to each of the two adjacent rows. A rotation angle of the solar panels may be determined (S140).

Specifically, in step S140, the central control server 100 controls the solar panel ( 200) can determine the rotation angle.

For example, the central control server 100 gradually decreases the rotation angle of the third solar panels belonging to the reference column by a preset interval from the reference rotation angle (that is, the shaded area of the reference column increases), and in the rear row adjacent to the reference column. While gradually increasing the rotation angle of the fourth solar panel belonging to the reference rotation angle by a preset interval (that is, reduction of the shaded area), the amount of power generation loss defined as a value obtained by multiplying the ratio of the shaded area and the predicted power generation amount is calculated by the third solar panel One of them and one of the fourth solar panels can be calculated, respectively. Here, the reference rotation angle may be a value obtained by adding a correction angle to the rotation angle determined with respect to the solar panels belonging to the front row adjacent to the reference row.

The central control server 100 may determine the rotation angles of the third solar panels and the rotation angles of the fourth solar panels so that the sum of the calculated two power generation losses is minimized.

Finally, the central control server 100 controls the rotation angle of each of the solar panels using the rotation angle determined in step S120 and the rotation angle determined in step S140 so that the rotation angle of the solar panel for all rows is optimally efficient. control as much as possible.

In summary, the central control server 100 controls the rotation angle of the solar panels so that sunlight is vertically incident (S100), and when there is a shaded area (S110), the shaded area sequentially from the easternmost row (S110). The rotation angle is determined to remove (S120), and in the process of determining the rotation angle, when a reference column that cannot avoid the shaded area occurs (S130), the shaded area for the rotation angle from the reference column to the last column The rotation angle between the photovoltaic panels belonging to adjacent rows is determined so that the ratio of and the amount of power generation loss according to the predicted power generation is minimized (S140).

On the other hand, the above-described steps are limited not to be performed more than once within a preset time interval (eg, 1 hour or 30 minutes), so that the rotation angle is not frequently controlled according to a temporary climate change or external environment change, Losses and malfunctions can be minimized.

8 is a diagram exemplarily illustrating a hardware configuration of a central control server according to an embodiment.

8, the central control server 100, at least one processor 110, and the at least one processor 110, instructions to instruct the at least one operation (operation) to perform (instruction) It may include a memory 120 for storing.

The at least one operation may include at least some of the operations or functions of the central control server 100 described with reference to FIGS. 1 to 7 , and detailed descriptions will be omitted to avoid duplicate descriptions.

Here, the at least one processor 110 may mean a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which methods according to embodiments of the present invention are performed. can Each of the memory 120 and the storage device 160 may be configured as at least one of a volatile storage medium and a non-volatile storage medium. For example, the memory 120 may be one of a read only memory (ROM) and a random access memory (RAM), and the storage device 160 is a flash-memory. , a hard disk drive (HDD), a solid state drive (SSD), or various memory cards (eg, micro SD card).

In addition, the central control server 100 may include a transceiver 130 for performing communication through a wireless network. In addition, the central control server 100 may further include an input interface device 140 , an output interface device 150 , a storage device 160 , and the like. Each of the components included in the central control server 100 may be connected by a bus 170 to communicate with each other.

For example of the central control server 100, a communicable desktop computer (desktop computer), a laptop computer (laptop computer), a notebook (notebook), a smart phone (smart phone), a tablet PC (tablet PC), a mobile phone (mobile) phone), smart watch, smart glass, e-book reader, PMP (portable multimedia player), portable game console, navigation device, digital camera, DMB (digital multimedia broadcasting) ) player, digital audio recorder, digital audio player, digital video recorder, digital video player, PDA (Personal Digital Assistant), and the like.

The methods according to the present invention may be implemented in the form of program instructions that can be executed by various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the computer readable medium may be specially designed and configured for the present invention, or may be known and available to those skilled in the art of computer software.

Examples of computer-readable media may include hardware devices specially configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions may include not only machine language codes such as those generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as at least one software module to perform the operations of the present invention, and vice versa.

In addition, the above-described method or apparatus may be implemented by combining all or part of its configuration or function, or may be implemented separately.

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art can variously modify and change the present invention within the scope without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that it can be done.

100: central control server
200: solar panel
300: group tracking control unit

Claims (1)

A solar power generation system that tracks sunlight in a way that converts linear motion into rotational motion, comprising:
a plurality of solar panels arranged in a plurality of columns and rows;
Group tracking control units that are physically connected to the solar panels to provide power for the rotational motion of each of the solar panels; and
and a central control server for controlling the rotational movement by transmitting a control command to each of the group tracking controllers,
Each of the rows indicates solar panels arranged to be spaced apart from each other by a predetermined distance in the east-west direction,
Each of the plurality of solar panels,
a plurality of solar panels disposed on the main frame;
an auxiliary frame coupled to the rear surface of the main frame and including a rotating shaft;
a rotation control unit for rotating the main frame or the auxiliary frame by a rotation angle about the rotation axis;
a support member physically connected to the auxiliary frame via the rotation shaft and vertically fixed to the ground to support a physical load;
a solar sensor installed on the main frame to measure the amount of light; and
A wire-type thermal sensor installed to pass through the solar panels to measure the amount of heat,
The rotation control unit,
a connecting member connecting the auxiliary frame and the front and rear drive shafts to each other via the rotation shaft;
The front-rear drive shaft is connected to the connecting member and the second rotation shaft as a medium to move linearly in a direction parallel to the ground; and
Including; a power member for providing power for the linear motion of the front and rear drive shaft;
The central control server,
controlling a rotation angle of each of the solar panels so that sunlight is vertically incident;
determining whether a shaded area exists in the solar panels belonging to each of the columns;
determining a rotation angle of each of the solar panels to sequentially remove the shaded area from the easternmost column among the rows when the shaded area is present;
determining whether a reference column in which the shaded area cannot be avoided exists among the columns; and
When the reference column exists, sequentially from the reference column to the last column, an operation of determining the rotation angle of each of the solar panels belonging to two adjacent columns based on the ratio of the shaded area and the predicted power generation is performed but,
The operation of determining the rotation angle of each of the solar panels belonging to two adjacent rows based on the ratio of the shaded area and the predicted power generation amount,
The rotation angle of the solar panels belonging to the reference row is gradually decreased by a preset interval from the preset reference rotation angle, and the rotation angle of the solar panels belonging to the rear row adjacent to the reference row is gradually increased by a preset interval from the reference rotation angle while calculating the power generation loss, which is defined as a value obtained by multiplying the ratio of the shaded area and the predicted power generation amount, in the solar panel belonging to the reference row and the solar panel belonging to the rear row, respectively, and the sum of the two calculated power generation losses is determining a rotation angle of each of the solar panels belonging to the two adjacent rows to be minimized.

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