JP2016092969A - Variable angle solar power system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide tracking type solar power system excellent in wind resistance.SOLUTION: A solar power system includes a solar panel, one pole supporting the solar panel at a predetermined height, a rotating shaft coupling the solar panel so as to be able to vary the inclination angle thereof with the pole as the axis, a reel located on the underside of the solar panel, and winding a wire while pulling out the opposite ends thereof, a motor for rotary driving the reel, and a pair of pulleys provided at a position of the same distance from the reel. Opposite ends of the wire are connected, respectively, with the lower surfaces of a pair of parallel opposite sides of the solar panel via the pulleys, and the inclination angle of the solar panel is controlled variably while following up the movement of the sun from sunrise to sunset, by rotary driving the reel so as to wind one end side of the wire, and to feed the other end side thereof.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a variable angle solar power generation system that changes the angle of a solar panel within a predetermined angle range.

  At present, in solar power generation systems, the fixed type with a solar panel fixed to the roof or mount is the mainstream, but the angle of the light receiving surface is fixed, so the vertical incident time of sunlight with the highest power generation efficiency is also possible. It was limited.

  In order to solve this problem, tracking solar power generation systems that variably control the angle of the solar panel following the movement of the sun have also been proposed (Patent Documents 1 to 8). In this tracking type, since the sunlight can be incident on the solar panel vertically or at an angle close to that from the sunrise to the sunset, the power generation amount is larger than that in the fixed type.

Special table 2014-522624 gazette Japanese Patent Application Laid-Open No. 2011-253997 JP 2011-35337 A JP 2003-324210 A JP 2001-91818 A Japanese Patent No. 5057412 Japanese Patent No. 4873279 Japanese Patent No. 3539729

  However, most of the tracking type photovoltaic power generation systems that have been proposed in the past have a configuration in which the center of the solar panel is supported by a support column and a rotary drive mechanism that variably controls the angle of the solar panel is provided between them. When the panel is struck by strong wind, the rotary drive mechanism may be damaged or the support may be bent. In particular, if the solar panel is to be changed within a range of ± 45 degrees from the horizontal state in order to widen the tracking range, it is necessary to make the column considerably high so that the solar panel does not interfere with the installation surface. Becomes unstable and the fear increases. Conversely, if the area of the panel is reduced, the column can be lowered and the center of gravity can be lowered. However, if this is done, the amount of power generation is sacrificed and there is no point in adopting the tracking type.

  Conventionally, the control system is complicated because the solar panel is tilted by obtaining an angle suitable for receiving sunlight from the current coordinates each time.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide an angle variable solar power generation system that has wind resistance and can control the inclination angle of the solar panel more easily. Is to provide.

  In order to achieve the above-described object, in the present invention, a solar panel, a single column that supports the solar panel at a predetermined height, and a rotation that variably connects the inclination angle of the solar panel about the column. A shaft, a reel positioned below the solar panel and wound with a wire with both ends pulled out, a motor for driving the reel to rotate, and a pair of pulleys provided at the same distance from the reel Each end of the wire is connected to the lower surface of each of a pair of opposite sides of the solar panel via the pulley, and the reel is driven to rotate to wind one end side of the wire and the other end The means of variably controlling the inclination angle of the solar panel by extending the side was used.

  According to the above means, the reels are driven to rotate by the motor, so that the respective feed amounts at both ends of the wire are relatively changed, and the solar panel is pulled down on the side where the feed amount is reduced by being wound around the reel, The inclination angle is varied. In performing such an operation, the center of the solar panel is supported by a support column, and a pair of parallel opposite sides are prevented from being lifted by a wire, thereby exhibiting wind resistance.

  Further, in the present invention, as a means for further improving the wind resistance of the solar panel, both ends of the wire fed from the reel are connected to the center line of the solar panel, while the wire is used as a drive wire and another guide wire is provided on both sides thereof. One set of guide pulleys is provided, and both ends thereof are connected to opposite sides of the solar panel so that each of the guide wires is parallel to the drive wire. According to this means, since the solar panel is fixed to the installation surface side with three parallel wires, wind resistance can be improved as compared with the case of one drive wire.

  It should be noted that the solar panel is ideally inclined so that sunlight enters the light receiving surface vertically. Therefore, using the time and the position of the sun as parameters, it has a data table in which the inclination angle of the solar panel at the time is stored in advance and has a clock mechanism, and the inclination angle of the solar panel is determined according to the time indicated by the clock mechanism. It is preferable to control the motor so that the angle is on the data table.

  In addition, by using the tracking solar power generation system as a unit and a system including a plurality of units, a power generation amount corresponding to the number of solar panels can be obtained. In that case, it is preferable to provide at the space | interval which a mutual solar panel does not interfere. The specific interval includes not only that the neighboring panels do not contact each other during the operation of changing the inclination of the solar panel, but also that the solar panel is not shaded.

  Furthermore, by changing the angle of the solar panel according to the South, Middle, and High altitudes, a system corresponding to the season can be obtained.

  According to the present invention, since the solar panel is tilted by winding the wire, the solar panel is prevented from being lifted by the wire and exhibits wind resistance. In addition, since the solar panel is tilted by a predetermined angle at a predetermined time, it is easy to control, can be installed at a low cost, and contributes to the popularization as a photovoltaic power generation system replacing the fixed type. it can.

Schematic explanatory diagram showing the operation of the solar panel of the system of the present invention Side view according to one embodiment of the system Top view of the reel according to the embodiment Top view of solar panel viewed from above Side view of the system composed of multiple units Explanatory drawing which showed another embodiment of this invention

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows the relationship between the sun S and the solar panel 1 in the photovoltaic power generation system according to the present invention. That is, in this system, the solar panel 1 is inclined by a predetermined angle at a predetermined time, and as a result, the movement of the sun S from sunrise to sunset follows the movement of the sun on the light receiving surface 1a. The inclination angle of the solar panel 1 is varied so that light is incident at or near the normal incidence.

  FIG. 2 shows an embodiment of the system of the present invention. In the figure, 2 is a support for supporting the solar panel 1 at a predetermined height, and 3 is a rotation for tiltably connecting the solar panel 1 to the support 2. A shaft 4 is a drive reel provided below the solar panel 1, 5 and 6 are drive wires wound around the drive reel 4, and 7 and 8 are pulleys provided at the same distance from the drive reel 4. In this embodiment, the drive reel 4 and pulleys 5 and 6 are fixed to the ground or a suitable base together with the support 1.

  The wires 5 and 6 are connected to the back surfaces 1b and 1c of the pair of opposite sides of the solar panel 1 through the pulleys 7 and 8, respectively. Further, the number of wires 5 and 6 is one, and the wires 5 and 6 are wound in a state where both ends are pulled out from the drive reel 4 as shown in FIG. The drive reel 4 is connected to a motor M for rotationally driving it. The type of the motor M is not limited, but a servo motor or a stepping motor that can accurately control the rotation angle is preferable.

  According to the above configuration, when the drive reel 4 is rotationally driven by the motor M, the feeding amount of the wires 5 and 6 is relatively changed, and the solar on the side where the feeding amount is reduced by being wound around the drive reel 4. The opposite side of the panel 1 is pulled downward, and the solar panel 1 is tilted about the rotation axis 3. At this time, the wire on the opposite side is fed out by the same amount as the winding amount in conjunction with the inclination of the solar panel 1.

  According to this system, even if a strong wind is generated, the solar panel 1 is connected to the ground and the pedestal by the wires 5 and 6, so that the floating is suppressed, and the column 2 and the rotating shaft 3 are excessively moved. The load is not applied, and these are prevented from being broken or broken.

  Note that the inclination angle of the solar panel 1 can be calculated in advance using a trigonometric function or the like based on the solar azimuth at each time, and this can be made into a data table. In the case of the present invention, the inclination angle of the solar panel 1 is determined by the length of the wires 5 and 6, which correlates with the amount of rotation of the drive reel 4. That is, the inclination angle of the solar panel 1 can be adjusted by adjusting the rotation amount of the drive reel 4. Since the drive reel 4 is rotationally driven by a motor, the inclination angle of the solar panel 1 can be controlled by controlling the motor. Therefore, in the present invention, the above-described data table is constructed using the time and the position of the sun as parameters, the angle corresponding to the time indicated by the internal clock mechanism is read from the data table, and the motor is controlled. 1 can be inclined to an angle suitable for the direction of the sun at that time.

  On the other hand, the sun trajectory changes not only during the day, but also depending on the season. Therefore, it is preferable to change the angle of the solar panel at noon according to the south-central altitude. Specifically, a universal joint such as a ball joint is used for the rotating shaft 3, and another set of the drive reel 4, wires 5 and 6, pulleys 7 and 8, and motor is prepared. As shown in FIG. 4, such a wire can be realized by connecting to each of the other parallel pair of opposite side portions 1 d and 1 e of the solar panel 1.

  Furthermore, by arranging the system having the above configuration as one unit and arranging a plurality of units in parallel, an increase in the amount of power generation corresponding to the number of solar panels 1 is expected. In that case, it is necessary to provide each unit in the space | interval which the mutual solar panel 1 does not contact. Furthermore, as shown in FIG. 5, as the inclination angle of the solar panel 1 increases, a shadow extends on the opposite side. Therefore, it is preferable to set an interval at which the shadow does not cover the adjacent solar panel 1.

  By the way, although the size of the shape of the solar panel 1 is arbitrary, the size of the frame including the cell is standardized by the manufacturer. In the above embodiment, the vertical length is about 4100 mm and the horizontal length is 3300 mm. . In the solar panel 1 having such a size, there is a possibility that the cell may be peeled off or the frame may be bent due to the bending. In view of this, FIG. 6 shows still another embodiment. In this embodiment, the wires 5 and 6 are connected along the center line C of the solar panel 1, while a pair of guide wires 10 and 11 are provided in parallel to each other on both sides thereof. The guide wires 10 and 11 are located at the same distance from the center line of the solar panel 1, and both ends thereof are connected to the opposite side portions 1 b and 1 c of the solar panel 1. The guide wires 10 and 11 are also connected to the solar panel 1 at both ends via a pair of pulleys 12 and 13 fixed to the ground or a gantry. However, the guide wires 10 and 11 are not provided with the drive reel 4 or the motor M, and the length between the pulleys 12 and 13 and the solar panel 1 is variable in conjunction with the wires 5 and 6 on the drive reel 4 side. .

  According to this embodiment, since the floating of the solar panel 1 is suppressed by the three wires, higher wind resistance can be obtained. Further, since the four corners of the solar panel 1 are restrained on the installation surface side by the guide wires 10 and 11, bending and twisting of the solar panel 1 can be prevented.

  Furthermore, the solar panel can be modularized by arranging cells in a strong frame, and a pedestal can be configured using H-shaped steel or the like.

DESCRIPTION OF SYMBOLS 1 Solar panel 1a Light-receiving surface 1b-1e Opposite side part 2 Support | pillar 3 Rotating shaft 4 Drive reel 5 * 6 Wire 7 * 8 Pulley

Claims (5)

A solar panel; a single support for supporting the solar panel at a predetermined height; a rotary shaft for connecting the solar panel to the support with a variable inclination angle; and a wire positioned below the solar panel; And a pair of pulleys provided at the same distance from the reel, and both ends of the wire are respectively connected via the pulleys. The solar panel is connected to the lower surfaces of a pair of opposite sides parallel to each other, and the reel is rotationally driven to wind up one end side of the wire and feed out the other end side, thereby varying the inclination angle of the solar panel. A variable angle solar power generation system characterized by control. While both ends of the wire fed out from the reel are connected to the center line of the solar panel, a pair of guide wires different from the wires are provided on both sides thereof, and the guide wires are respectively connected to the wires via separate pulleys. The variable angle solar power generation system according to claim 1, wherein the solar panel is connected to opposite sides of the solar panel. With the time and position of the sun as parameters, it has a data table that previously stores the inclination angle of the solar panel at the time and has a clock mechanism, and the inclination angle of the solar panel according to the time indicated by the clock mechanism The variable angle solar power generation system according to claim 1 or 2, wherein the motor is controlled to have an angle on the data table. A variable-angle solar power generation system in which the variable-angle solar power generation system according to claim 1, 2 or 3 is used as a unit, and a plurality of units are provided at intervals at which solar panels do not interfere with each other. 5. The variable angle solar power generation system according to claim 1, wherein the angle of the solar panel is varied in accordance with the south-central altitude of the sun.

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