Solar power generation system

Abstract

To provide a solar power generation system which can be installed in a place where there is no building and is not likely to receive a wind pressure load, whose light reception area can be increased, and in which a solar power generation unit can be easily replaced.SOLUTION: A solar power generation unit includes a tubular base portion that has a rectangular cross section and is long and tubular, and a sheet-shaped flexible solar power generation sheet that is wound around at least three surfaces which are an upper surface and both side surfaces of outer periphery surfaces of the tubular base portion, is attached to the lower surface side of the tubular base portion so as not to come off, and has a substantially rectangular shape when extended. In a solar power generation system, the solar power generation unit is disposed, on a support column, with the upper surface directed to the South in an attachable / detachable manner at an inclination angle of 30 to 90°. Accordingly, the problem can be solved.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a photovoltaic power generation system using a flexible sheet-like photovoltaic sheet. [Background technology]

[0002] Patent Document 1 discloses a solar power generation facility in which solar cells are arranged in three tiers on a support, with each solar cell arranged on each support of an H-shaped pillar with a beam hung horizontally at at least one location between two pillars, with multiple solar cells arranged in parallel on the same tier not connected to nearby solar cells, facing south and at an inclination angle of 30° to 50°, and between the adjacent upper and lower solar cells, the angle between the ground and a line connecting the bottom end of the upper solar cell and the top end of the lower solar cell is greater than the meridian altitude at the summer solstice at the latitude of the installation location, and the solar cells on the lowest tier and the solar cells on the highest tier are each offset in the north-south direction around the support.

[0003] Patent Document 2 discloses a pole-type solar power generator having a solar cell module and capable of generating electricity from sunlight using the solar cell module in an approximately vertically erected state, the pole-type solar power generator comprising a pole body, a roughly cylindrical cylinder body arranged on the outer circumferential surface side of the pole body so as to be rotatable relative to the pole body, the solar cell module arranged on at least a portion of the outer circumferential surface side of the cylinder, and a battery for storing electricity generated by the solar cell module.

[0004] Patent Document 3 discloses an attachment structure for a photovoltaic sheet, comprising an exterior material having a plurality of protrusions extending in one direction and spaced apart in a direction perpendicular to the one direction, a photovoltaic sheet arranged across the plurality of protrusions and having a bending strength of 50 MPa or more and 200 MPa or less, and a fixing material that fixes the photovoltaic sheet to the portion between adjacent protrusions in a state in which the photovoltaic sheet is curved in cross section to follow the plurality of protrusions. [Prior art documents]

Patent Document

[0005]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0006] The solar power generation equipment of Patent Document 1 can be installed even in places without buildings. However, since it uses a flat-plate silicon-based solar cell with a conventionally installed light-receiving surface facing obliquely upward, there is a problem that it is easily affected by wind pressure load, and it is difficult to increase the light-receiving area of the solar cell other than by increasing the number of stages.

[0007] The pole-type solar power generator of Patent Document 2 is in a form in which a solar power generation sheet is wound around the outer peripheral surface of a vertically installed columnar body. Therefore, it can be installed even in places without buildings and is not easily affected by wind pressure load. However, there is a problem that the light-receiving area of the solar cell cannot be increased beyond the area of the outer peripheral surface of the columnar body, and it is difficult to expand the light-receiving area.

[0008] The mounting structure of the solar power generation sheet of Patent Document 3 is such that a solar power generation sheet containing a perovskite compound is attached to the outer surface of a building by a fixing material, for example, attached along the shape of a roof with unevenness. Therefore, compared with a flat-plate solar cell panel with high rigidity, the surface area of the solar power generation sheet per unit area of the roof surface can be increased. However, since it is the difference between the area of the slope of the uneven portion and the area of the slope in plan view, there is a problem that the light-receiving area does not expand much. In addition, since it is attached along the outer surface of an existing building, there is a problem that it cannot be installed in places without buildings, such as ditches in paddy fields.

[0009] The present invention was devised in view of such problems, and an object thereof is to provide a solar power generation system that can be installed even in a place where there is no building, is easy to replace a solar power generation unit, is less susceptible to wind pressure loads, and can greatly expand the light-receiving area.

Means for Solving the Problems

[0010] The solar power generation system according to claim 1 is a solar power generation system having a solar power generation unit detachably attached to two support members in the vertical direction projecting in the north-south direction from a support column by fastening means at the upper and lower ends thereof, wherein the solar power generation unit has a rectangular cross-section, a long and cylindrical tubular base, and a flexible sheet-like shape that is wound around the outer peripheral surfaces of at least three sides of the tubular base and has both ends fixed to the lower surface of the tubular base by adhesion means or pressing means and is substantially rectangular when expanded, or a flexible sheet-like shape that has both ends overlapped on the lower surface side of the tubular base and the overlapped ends are detachably fastened by fastening means and is substantially rectangular when expanded, and the solar power generation sheet, and the solar power generation unit is detachably disposed on the support column with the upper surface facing south and at an inclination angle of 30° to 90°.

[0011] The solar power generation system according to claim 2 is characterized in that, in claim 1, the solar power generation sheet is a perovskite solar power generation sheet.

[0012] The solar power generation system according to claim 3 is characterized in that, in claim 1 or 2, the combination of the support columns is an H-shaped column having a cross beam horizontally installed at at least one place between two support columns.

Effects of the Invention

[0013] The solar power generation system according to claim 1 can be installed even in soft places such as paddy fields by erecting the support columns with foundation concrete work underground, and can also be installed in places without buildings such as along roads. Since the solar power generation units are in a rod shape, they are less likely to receive wind pressure loads, so the risk of collapse can be reduced. And since the solar power generation units receive light on three sides, namely the south-facing upper surface and the east-facing and west-facing side surfaces, the light receiving area can be expanded.

[0014] Also, since the solar power generation units are detachably attached to the support columns by fastening means, each solar power generation unit can be easily replaced. Further, in the case where the solar power generation sheets are overlapped at their ends on the lower surface side of the cylindrical base and the overlapped ends are detachably fastened by fastening means, or in the case where both ends of the solar power generation sheets are fixed to the lower surface of the cylindrical base by pressing means, since the solar power generation sheets are detachably wound around the outer peripheral surface of the solar power generation units, the solar power generation sheets can also be easily replaced.

[0015] The solar power generation system according to claim 2, the perovskite solar power generation sheet which is a solar power generation sheet, is resistant to bending and has a high absorbance, so it can generate electricity even with weak light. Therefore, it is not necessary to finely limit the azimuth angle of the solar power generation units, and there is no need to rotate them to face the sun's azimuth. When the inclination angle is reduced, the height of the support columns can be lowered.

[0016] The solar power generation system according to claim 3, since the solar power generation units are arranged on two support columns with a strong framework assembled into an H-shaped column, a large number of solar power generation units can be arranged on the support columns.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Mode for Carrying Out the Invention

[0018] The solar power generation system 1 of the present invention is a solar power generation system 1 that uses a flexible solar power generation sheet 3 that is square and sheet-like when expanded to generate electricity.

[0019] As shown in FIGS. 1 to 3 and FIGS. 11 to 13, the solar power generation system 1 of the present invention has a solar power generation unit 2 detachably attached to two support members 6a and 6b projecting in the vertical direction from a support column 4 in the north-south SN direction by fastening means 43 at the upper and lower ends thereof. The solar power generation unit 2 has a rectangular cross-section and a long cylindrical base 5, and a flexible sheet-like member that is wound around the outer peripheral surfaces of at least three sides of the cylindrical base 5 and has both ends fixed to the lower surface 32 of the cylindrical base 5 by an adhesive means or a pressing means, and forms a substantially rectangular shape when expanded, or a flexible sheet-like member that has both ends overlapped on the lower surface 32 side of the cylindrical base 5 and has the overlapped ends detachably fastened by a fastening means 41 and forms a substantially rectangular shape when expanded. The solar power generation unit 2 is detachably disposed on the support column 4 with the upper surface facing south and an inclination angle β of 30° to 90°.

[0020] The solar power generation system 1 of the present invention is a solar power generation system 1 in which a plurality of solar power generation units 2 are arranged in multiple stages on at least one support column 4. As shown in FIG. 4, there is a surface part on the ground and a part buried in the ground 51. The length L1 of the surface part is about 2 / 3 of the total length of the support column 4, and the length L2 of the part buried in the ground 51 is about 1 / 3 of the total length of the support column 4 for construction. Then, the lower part of the support column 4 is fixed with a foundation concrete 50 on the surface part. Thereby, the support column 4 can be firmly erected.

[0021] As shown in FIG. 4, when there are two support columns 4, a combination of H-shaped columns with a cross beam 11a horizontally spanned at least at one place between the two support columns 4 is used. Thereby, as shown by the dotted line in FIG. 4, a closed frame of a strong rectangular frame 35 is formed by the two support columns 4, the foundation concrete 50, and the cross beam 11a, so that the two support columns 4 are strong against shaking and the like.

[0022] By using the H-shaped columns, for example, as shown in FIG. 2, four solar power generation units 2, two on each side of the column 4, are arranged in three rows, and a total of 24 solar power generation units 2 are provided by the two columns 4, or, as shown in FIG. 3, six solar power generation units 2, three on each side of the column 4, are arranged in three rows, and a total of 36 solar power generation units 2 are provided by the two columns 4, thus realizing an increase in the power generation amount.

[0023] Also, the column 4 can be installed anywhere, whether in a place with a narrow installation area or a place far from a commercial power source. For example, it can be installed on soft ground in a paddy field, beside a rural road, at a planned evacuation site for backup during a long-term power outage in case of a disaster, or in a place where there are no utility poles around. It can be used anywhere as a power source for EV charging facilities, all-night lights, power sources for pest control facilities in farmland, etc.

[0024] Also, as shown in FIGS. 1 to 3, a plurality of the solar power generation units 2 are arranged on the column 4. To arrange the solar power generation units 2, as shown in FIGS. 5 and 6, two rod-shaped support members 6a and 6b in the vertical direction protruding from the column 4 in the north-south SN direction are provided. The upper end portion of the solar power generation unit 2 is detachably fixed by fastening means 43 such as bolts to fixing means 7a fixed to the tip of the upper support member 6a, and the lower end portion of the solar power generation unit 2 is detachably fixed by fastening means 43 such as bolts to fixing means 7b fixed to the tip of the lower support member 6b as shown in FIG. 9.

[0025] The fixing means 7a and 7b have a substantially horizontal support member side plane that contacts the plane of the support members 6a and 6b, and a cylindrical base side plane that contacts the square cross-sectional surface of the cylindrical base 5 of the photovoltaic unit 2 and is bent at the same angle β as the inclination angle of the photovoltaic unit 2. The support member side plane and the cylindrical base side plane are provided with holes through which fastening means 45 such as bolts can be inserted. Then, as shown in FIG. 6, the portion of the fixing means 7a and 7b having the support member side plane and the support members 6a and 6b are fixed by fastening means 45 such as bolts. Note that the form of the fixing means 7 may be any means that can detachably fix the cylindrical base 5 of the photovoltaic unit 2.

[0026] Also, in order to maintain the interval between the adjacent photovoltaic units 2 in the left-right direction (east-west direction) of the support members 6a and 6b, as shown in FIGS. 1 to 3, the angle irons 16a fixed to the columns 4 are horizontally spanned and connected across all the support members 6a in the same row, and the angle irons 16b fixed to the columns 4 are horizontally spanned and connected across all the support members 6b in the same row. Thereby, the positional relationship of the support members 6a and 6b with respect to the columns 4 does not shift.

[0027] The photovoltaic sheet 3 has flexibility and is in the shape of a square sheet when unfolded, such as an amorphous silicon photovoltaic sheet or a perovskite photovoltaic sheet, etc., but preferably a perovskite photovoltaic sheet. The perovskite photovoltaic sheet is resistant to bending and has a high absorbance, so it can generate electricity even with weak light and can be attached in various shapes, and can generate electricity even in the shade where direct sunlight does not shine. Therefore, as shown in FIGS. 1, 14 to 15, when the photovoltaic sheet 3 is wound around the upper surface 31 and both side surfaces of the square cross-section of the cylindrical base 5 and the upper surface 31 faces south, the east side surface and the west side surface are alternately irradiated with direct sunlight and shaded, but electricity can be generated on three surfaces.

[0028] The photovoltaic unit 2 includes a cylindrical base 5 having a rectangular cross-section and a long and cylindrical shape as shown in FIGS. 7 and 14, and a flexible sheet-like member that is wound around at least the upper surface 31 and both side surfaces of the outer peripheral surface of the cylindrical base 5 and has both ends fixed to the lower surface 32 of the cylindrical base 5 by an adhesive means or a pressing means and is substantially rectangular when expanded, or a flexible sheet-like member that has both ends overlapped on the lower surface 32 side of the cylindrical base 5 and the overlapped ends are detachably fastened by a fastening means 41 and is substantially rectangular when expanded. In addition, even in the case where both ends of the photovoltaic sheet 3 are fixed to the lower surface 32 of the cylindrical base 5a by a pressing means, the photovoltaic sheet 3 is detachably fixed to the cylindrical base 5a.

[0029] As shown in FIGS. 7 and 14, the cylindrical base 5 has a rectangular cross-section and is long, and is provided with through holes for inserting bolts or the like for fastening both ends to fixing means 7 that are connected and fixed to the support column 4. However, in order to detachably fix the cylindrical base 5 to the fixing means 7, it is not limited to providing through holes for inserting bolts in the cylindrical peripheral wall of the cylindrical base 5. For example, a connecting joint (not shown) may be fixed to the cylindrical outer peripheral surface of the cylindrical base 5, and the connecting joint and the fixing means 7 may be detachably fixed by a fastening means such as a bolt.

[0030] Further, when the photovoltaic sheet 3 is formed such that the ends are overlapped on the lower surface 32 side of the cylindrical base 5 and the overlapped ends are detachably fastened by a fastening means 41 as shown in FIGS. 8 and 14(a), or when both ends of the photovoltaic sheet 3 are fixed to the lower surface 32 of the cylindrical base 5 by a pressing means as shown in FIGS. 10 and 14(c), the cylindrical base 5a has an annular stopper 10 for preventing the photovoltaic sheet 3 from slipping down fixed by welding or the like at the end that becomes the lower side when attached to the support column 4 as shown in FIG. 7(a). Note that the fixing means of the stopper 10 may be any means as long as the stopper 10 can be fixed to the cylindrical base 5a, such as fastening by a bolt or adhesion by an adhesive.

[0031] And, as shown in FIGS. 9 and 14(b), in the case where both ends of the photovoltaic sheet 3 are fixed to the lower surface 32 of the cylindrical base 5 by an adhesion means, the cylindrical base 5b, as shown in FIG. 7(b), directly fixes the photovoltaic sheet 3 to the lower surface 32 of the cylindrical base 5b, so the stopper 10 is unnecessary.

[0032] Also, the square shape of the cross-sectional shape of the cylindrical base 5 includes a square shape and a rectangular shape. However, if the light-receiving area on the upper surface facing south is made too wide, the photovoltaic unit 2 will become flat and be easily damaged by wind pressure load. If the light-receiving areas on both side surfaces facing east or west are made too wide, the light-receiving area on the upper surface facing south of the photovoltaic unit 2 that receives direct sunlight will become narrow. Therefore, the square shape of the cylindrical base 5 is preferably a square.

[0033] Also, the size of the cylindrical base 5 (5a, 5b) is, for example, in the case where the cross-sectional shape is square, there is a 75 mm square with a length of 1.2 m, but any size may be used.

[0034] Next, the fixing means of the flexible photovoltaic sheet 3 that is wound around the cylindrical base 5 and is square-shaped and sheet-like when expanded will be described. First, in the case where the photovoltaic sheets 3 are overlapped at their ends on the lower surface 32 side of the cylindrical base 5a and the overlapped ends are detachably fastened by a fastening means 41, the flexible sheet-like photovoltaic sheet 3 is wound from the upper surface 31, the left and right side surfaces, and the lower surface 32 of the cylindrical base 5a with a stopper 10 as shown in FIG. 7(a), which is substantially square in cross-section and long and rectangular parallelepiped-shaped, as shown in FIGS. 8, 11, or 14(a). And both ends of the photovoltaic sheet 3 are overlapped at their ends on the lower surface 32 of the cylindrical base 5a and fastened by a fastening means 41 at at least three locations: the upper end, the central part, and the lower end in the longitudinal direction of the ends, as shown in FIGS. 8 and 11. Note that the number of fastening locations may be three or more.

[0035] Also, when winding the photovoltaic sheet 3 around the cylindrical base 5a as shown in FIG. 7(a), it may be wound so that there is almost no gap 48 and it is in close contact with the outer surface of the cylindrical base 5a as shown in FIG. 14(a). As shown in FIGS. 15(a) and 15(b), it may be wound with a slight gap 48 formed from the outer surface of the cylindrical base 5a. Regarding the gap 48, it is not limited to the case shown in FIG. 14(a) where the photovoltaic sheet 3 is overlapped at the ends on the lower surface 32 side of the cylindrical base 5a and the overlapped ends are fastened by fastening means 41 so as to be detachable. There may also be a gap 48 in the case shown in FIG. 14(b) where both ends of the photovoltaic sheet 3 are fixed to the lower surface 32 of the cylindrical base 5b by an adhesive means, or in the case shown in FIG. 14(c) where both ends of the photovoltaic sheet 3 are fixed by pressing means on the lower surface 32 of the cylindrical base 5a.

[0036] Also, as shown in FIG. 15(b), it may be fastened by the fastening means 41 such as bolts and nuts through a pressing strip plate 22 which is flat and elongated in thickness and has an elongated shape over the entire length in the longitudinal direction of the overlapped ends of the photovoltaic sheet 3. Thereby, the photovoltaic sheet 3 can be prevented from being peeled off by the wind pressure load.

[0037] Next, in the case where the photovoltaic sheet 3 is wound around at least the upper surface 31, both side surfaces, and three surfaces of the outer peripheral surface of the cylindrical base 5b as shown in FIG. 7(b) and both ends are fixed to the lower surface 32 of the cylindrical base 5b by an adhesive means, the flexible sheet-like photovoltaic sheet 3 is wound from the upper surface 31, the left and right side surfaces, and three surfaces of the cylindrical base 5b without the stopper 10 as shown in FIG. 7(b), which has a substantially square cross-sectional shape and is in the shape of a long rectangular parallelepiped, to the lower surface 32 as shown in FIG. 9. And both ends of the photovoltaic sheet 3 are adhered to the lower surface 32 of the cylindrical base 5b with an adhesive.

[0038] Examples of the adhesive include epoxy resin, acrylic resin, silicone resin, polyurethane resin, vinyl acetate resin, etc. Any adhesive may be used as long as it has heat resistance and cold resistance for installation outdoors with temperature differences and has tensile adhesive strength, shear adhesive strength, and peel adhesive strength at a level that does not peel even under wind pressure load.

[0039] Next, in the case where the photovoltaic sheet 3 is wound around at least the upper surface 31 and both side surfaces of the outer peripheral surface of the cylindrical base 5a as shown in FIG. 7(a), and both end portions are fixed to the lower surface 32 of the cylindrical base 5a by pressing means, the flexible sheet-shaped photovoltaic sheet 3 is wound from the upper surface 31 and the left and right side surfaces to the lower surface 32 of the cylindrical base 5a with a stopper 10 as shown in FIGS. 7(a), 10, and 14(c), which has a substantially square cross-sectional shape and is a long rectangular parallelepiped shape. Then, both end portions of the photovoltaic sheet 3 are pressed by a pressing plate member 23 of a spring plate having a biasing force in a direction in which both end portions in the short side direction are pressed in a thin and long shape at the lower surface 32 of the cylindrical base 5a. The pressing plate member 23 is fastened by fastening means such as a bolt 25 via a spring washer 24 and detachably fixed. As shown in FIGS. 10 and 13, the fastening portion of the bolt 25 is fastened at at least three locations, i.e., the upper end portion, the central portion, and the lower end portion, in the longitudinal direction of the cylindrical base 5a. Note that the number of fastening locations may be three or more.

[0040] The photovoltaic unit 2 has flexibility, and the flexible sheet-shaped photovoltaic sheet 3, which is square-shaped when expanded, is wound around at least the upper surface 31 and both side surfaces of the outer peripheral surface of the cylindrical base 5 having a square cross-sectional shape and being long and cylindrical, so as not to come off from the cylindrical base 5 on the lower surface 32 side of the cylindrical base 5.

[0041] As a form of preventing the photovoltaic power generation unit 2 from detaching from the cylindrical base 5, in a first embodiment, as shown in Fig. 7(a), the photovoltaic power generation sheet 3 is disposed on the cylindrical base 5a as shown, and as shown in Fig. 8, the overlapping ends are detachably fastened by fastening means 41 to form the photovoltaic power generation unit 2a. In a second embodiment, as shown in Fig. 7(b), the photovoltaic power generation sheet 3 is disposed on the cylindrical base 5b as shown, and as shown in Fig. 9, the ends are adhered with an adhesive to form the photovoltaic power generation unit 2b. In a third embodiment, as shown in Fig. 7(a), the photovoltaic power generation sheet 3 is disposed on the cylindrical base 5a as shown, and as shown in Fig. 10, the ends are detachably fixed with a pressing belt to form the photovoltaic power generation unit 2c. The form of preventing the photovoltaic power generation unit from detaching from the cylindrical base 5 is not limited to the above embodiments, and any form may be used as long as the photovoltaic power generation sheet 3 is prevented from detaching from the lower surface 32 of the cylindrical base 5.

[0042] And the detachable fixation of the photovoltaic power generation unit 2 to the fixing means 7 connected to the support column 4 is such that the photovoltaic power generation unit 2a is detachably fixed to the fixing means 7a, 7b by fastening means 43 as shown in Fig. 11, the photovoltaic power generation unit 2b is detachably fixed to the fixing means 7a, 7b by fastening means 43 as shown in Fig. 12, and the photovoltaic power generation unit 2c is detachably fixed to the fixing means 7a, 7b by fastening means 43 as shown in Fig. 13.

[0043] The photovoltaic power generation units 2 (2a, 2b, 2c) as shown in Figs. 8 to 10 are small items, for example, having a size of about 75 mm square and a length of about 1.2 m. If one of the photovoltaic power generation units 2 (2a, 2b, 2c) in the operating photovoltaic power generation system 1 fails, it can be easily taken to the installation location of the photovoltaic power generation system 1 and replaced.

[0044] As shown in FIGS. 8 to 10, the solar power generation units 2 (2a, 2b, 2c) are provided with through holes for fixing (not shown) at the upper and lower ends where the cylindrical base 5 is exposed. As shown in FIGS. 11 to 13, it can be detachably and easily fixed by a fastening means 43 through which bolts or the like are easily inserted together with the fixing means 7a, 7b. Thus, as shown in FIGS. 2 and 3, if, for example, one of the multiple solar power generation units 2 (2a, 2b, 2c) fails, it can be easily and quickly replaced with a spare solar power generation unit 2 (2a, 2b, 2c).

[0045] Wires (not shown) connected to the electrodes (not shown) of the solar power generation sheet 3 are connected to a control unit (not shown) in a control panel 13 that monitors the power generation status one by one for each solar power generation unit 2. By the control unit, the power for self-use is transmitted to the storage battery in the storage battery box 14, and the surplus power is controlled to be measured by a meter in the meter box 12 and sold to the grid.

[0046] The control unit monitors the power generation status of each solar power generation unit 2, and the control unit causes the monitoring information to be transmitted to an information processing device in a monitoring room at a remote location via a network by a transmission / reception unit (not shown) in the control panel 13. When the control unit detects a solar power generation unit 2 with extremely low power generation or no power generation, it transmits the information to the information processing device in the monitoring room, and the information processing device displays an abnormality on the connected display screen. Therefore, the failed solar power generation unit 2 can be quickly and easily grasped individually, and the replacement of the solar power generation unit 2 can be expedited.

[0047] Since the perovskite solar power generation sheet has a high absorbance and can generate electricity even with weak light, regardless of the altitude and azimuth angle of the sun, as shown in Fig. 1, in the form of attaching the solar power generation unit 2 to the support column 4, the upper surface of the solar power generation unit 2 is oriented southward (towards S), and it is installed obliquely at an inclination angle β of 30° to 90°. As the inclination angle β approaches 30°, the inclination of the oblique installation of the solar power generation unit 2 approaches the horizontal direction, so the height direction interval between each stage of the solar power generation unit 2 can be narrowed, and thus the height of the support column 4 can be lowered. As it approaches 90°, it can be installed on a narrow site in plan view.

[0048] Also, even if it is installed in a fixed southward direction without the need to rotate according to the azimuth angle of the sun, the light-receiving area receiving direct sunlight from the sun does not change much.

[0049] Next, Table 1 shows the latitudes of various places and the south zenith altitude at the time of the summer solstice.

[0050]

Table 1

[0051] And, as shown in Fig. 1, between the solar power generation units 2 in the immediate upper and lower positions, the angle α formed between the line connecting the lower end of the upper solar power generation unit 2 and the upper end of the lower solar power generation unit 2 and the ground is arranged to be larger than the south zenith altitude at the time of the summer solstice at the latitude of the installation location shown in Table 1, for example. The lowermost solar power generation unit 2 and the uppermost solar power generation unit 2 are arranged with a shift in the north-south direction respectively around the support column 4.

[0052] Thereby, it is possible to prevent the shadow of the upper solar power generation unit 2 from being generated on the lower solar power generation unit 2, and the light-receiving area receiving direct sunlight is enlarged.

[0053] Next, as shown in FIGS. 14 and 15, the photovoltaic sheet 3 is wound around the upper surface 31 and the left and right side surfaces of a cylindrical base 5 having a substantially square cross-sectional shape and a long rectangular parallelepiped shape from the three surfaces to the lower surface 32, thereby explaining that the light-receiving area is enlarged compared to the form of being attached flatly.

[0054] For example, as shown in FIG. 16, in the upper row, for example, two photovoltaic units 60 of the present invention having a substantially square cross-sectional shape with a side length V of 75 mm and a length of 1.2 m are arranged in two rows at an interval of 75 mm, and in the lower row, a flat photovoltaic unit 63 of a comparative example having a width W2 of 22.5 mm with rigidity and a length of 1.2 m is installed. When the horizontal width V×3 (22.5 mm) of the upper photovoltaic unit 60 and the width W2 (22.5 mm) of the lower photovoltaic unit 63 are the same width, as shown in FIG. 17(a), the total width W1 of the light-receiving surfaces 61 of two of the photovoltaic units 60 of the present invention is 450 mm, which is 6 times the width V of 75 mm of one light-receiving surface 61. As shown in FIG. 17(b), compared with the width W2 of 22.5 mm of the light-receiving surface 64 of the photovoltaic unit 63 of the comparative example, there is a difference in the light-receiving area of up to about 2 times. Especially in the case of a perovskite photovoltaic sheet, it generates electricity even in the shade, so an increase in the power generation amount can be expected. Thus, compared with the form of attaching the photovoltaic sheet 3 flatly as shown in the lower row of FIG. 16, attaching the photovoltaic sheet 3 to the upper surface 31 having a substantially square cross-sectional shape and the left and right side surfaces in total three surfaces as shown in the upper row of FIG. 16 can expand the light-receiving area.

[0055] As described above, by forming the column 4 into the H-shaped column, a large number of the photovoltaic units 2 can be installed on the two columns 4, and since the photovoltaic unit 2 is miniaturized and detachable, it can be easily replaced. Further, since the photovoltaic sheet 3 is wound around the upper surface 31 and the left and right side surfaces of the cylindrical base 5 having a square cross-sectional shape in the photovoltaic unit 2 to generate electricity, there is also an effect that the light-receiving area can be significantly expanded compared to the conventional case of only the upper surface.

Explanation of Reference Numerals

[0056] 1 Photovoltaic power generation system 2, 2a, 2b, 2c Photovoltaic power generation units 3 Photovoltaic power generation sheet 4 Support column 5, 5a, 5b Cylindrical base 6, 6a, 6b Support member 7, 7a, 7b Fixing means 10 Stopper 11 Cross beam 12 Meter box 13 Control panel 14 Battery box 16 Brace part 22 Pressing strip plate 23 Pressing strip plate 24 Spring washer 25 Bolt 31 Upper surface 32 Lower surface 35 Square frame 41 Fastening means 43 Fastening means 45 Fastening means 48 Gap 50 Foundation concrete 51 Underground 60 Photovoltaic power generation unit 61 Light receiving surface 63 Photovoltaic power generation unit 64 Light receiving surface N North S South V Width W Width α Angle β Inclination angle

Claims

1. A solar power generation system having a solar power generation unit detachably attached to upper and lower ends of two support members in the vertical direction protruding north-south from a support column by fastening means, wherein the solar power generation unit, has a cylindrical base portion having a rectangular cross-section and being long and cylindrical, and a flexible sheet-like solar power generation sheet that is wound around the outer peripheral surfaces of at least three sides of the cylindrical base portion and has both ends fixed to the lower surface of the cylindrical base portion by an adhesion means or a pressing means and is substantially rectangular when expanded, or a flexible sheet-like solar power generation sheet that has both ends overlapped on the lower surface side of the cylindrical base portion and has the overlapped ends detachably fastened by a fastening means and is substantially rectangular when expanded, and the solar power generation unit is detachably disposed on the support column with the upper surface facing south and at an inclination angle of 30° to 90°. A solar power generation system characterized by this.

2. The solar power generation system according to claim 1, characterized in that the solar power generation sheet is a perovskite solar power generation sheet.

3. The solar power generation system according to claim 1 or 2, characterized in that the combination of the support columns is an H-shaped column with a cross beam horizontally installed at least at one location between two support columns.

Images