JP2018026892A - Cable suspension aerial photovoltaic power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable suspension aerial photovoltaic power generator in which a photovoltaic power generation panel is hardly oscillated.SOLUTION: In a cable suspension aerial photovoltaic power generator, a front and rear group of support rods 1a and 1b is separated to a longitudinal direction and is provided on a foundation G, cables 2a and 2b in front and rear sides are installed between the support rods 1a and 1b, and a photovoltaic power generation panel P is attached to the cable through a frame 10. The frame 10 is formed by left and right group of frame levers 11 and 11 installed between the longitudinal cables; and a front and rear group of purlin materials 12 fixed on an upper surface of the frame levers between the pair of frame levers. A panel P is provided on the upper surface of the purlin materials. Since an air (wind) blows in a space between the panel and the purlin materials and the wind smoothly blows due to existence of the purlin materials, reattachment is progressed from the peeling depending on a wind direction. An oscillation of the panel is suppressed by the blowing of the wind in the space and the reattachment. When the oscillation is suppressed, the length between cable spans of the support rods can become longer, and it can be adapted to a various land form condition, and the cost can be reduced.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a cable suspension type aerial photovoltaic power generation apparatus that supports a photovoltaic power generation panel on a cable.

In recent years, photovoltaic power generation using solar energy, which is one of renewable energies, has been spreading as an environment-friendly system. The modules for photovoltaic power generation (solar power generation panels) are fixed installation type (alley placement, field, etc.) through a special frame on flat areas such as inappropriate agricultural land, abandoned agricultural land, vacant land, and roofs of various buildings. Is the mainstream.
However, in Japan, where the country is small, there are limited flat lands and roofs where solar power generation panels (hereinafter simply referred to as “panels”) are installed. It is desired to be installed in various other places (ground) such as above.

For this reason, a pair of front and rear struts are provided on the ground separated in the left-right direction, and cables are suspended between the left and right front struts and between the left and right rear struts, and between the front and rear cables. A cable-suspended aerial solar power generation device (equipment) is proposed in which a frame is installed on the frame and a solar power generation panel is attached to the frame (see, for example, FIG.
Since this cable suspension type aerial photovoltaic power generation apparatus can be installed in a river, a valley, etc. as well as a parking lot and a building, as long as it can construct a support column, it does not choose a mode below the cable.

JP2012-600095A Japanese Patent Laying-Open No. 2015-37163

Although the photovoltaic power generation panel depends on the type, the weight is about 12 kg / m ² and is not a large weight as an installation object. However, in the above-described cable-suspended aerial solar power generation device, the vibration (sway) of the panel due to wind becomes a problem as well as the cost. At this time, if the span between the columns is shortened or a cable for preventing shaking is stretched, the vibration can be suppressed. In addition, if the support structure of the panel to the cable is simple, the cost can be reduced. However, the connection part between the frame such as the frame and the cable often has a complicated structure.

  This invention makes it a subject to lengthen the said span between the said right-and-left support | pillars, ie, the said span, etc. in a cable suspension type | mold air solar power generation device based on the above actual condition.

In order to achieve the above object, the present invention has been devised in the structure of a gantry for suspending a photovoltaic power generation panel on a cable to prevent panel vibration due to wind.
If the panel does not vibrate, the span can be lengthened, the number of struts can be reduced, and the cost can be reduced.

Specifically, cables suspended between a suspension structure provided on the ground with a pair of front and rear columns separated in the left-right direction, the left and right front columns, and the left and right rear columns. And a frame suspended between the front and rear cables, and a solar power generation panel attached to the frame, the frame (stand) between the front and rear cables A pair of left and right frame fences, and a purlin material fixed on the upper surface of the frame fence between the pair of frame fences, and a configuration in which a photovoltaic panel is provided on the upper surface of the purlin material It was.
With this configuration, as will be described later, a space is formed by the purlin material between the photovoltaic power generation panel and the frame wall, and since air (wind) passes through the space, the aerodynamic force is weakened, and the vibration of the panel is It is suppressed.

In this configuration, it is preferable that each of the photovoltaic power generation panels is adjusted to the inclination angle of the ground provided with the support columns. In this way, since the wind (airflow) normally flows along the ground surface, the panel (surface) is in that direction (according to the inclination angle of the ground), so Drag is reduced.
In addition, if the front and rear, left and right of the frame are attached to the front and rear cables via vertical support rods, a space is formed between the cable and the photovoltaic power generation panel, and air (wind) passes through the space. The vibration of the panel is suppressed. The panel is attached to the cable by the support rod, for example, one end of the support rod is fixed to the frame, and the other end of the support rod is fixedly fixed to the adjustment plate. It is possible to employ a configuration in which the fastening plate is fastened and fixed with bolts and nuts through a long hole to the fastening plate that is fastened and fixed. The angle of the panel surface with respect to the horizontal can be adjusted by the position of the bolt in the long hole.
In addition, if the stay cable from the middle of the cable suspended between the left and right columns is fixed to the ground, the divergence of the entire frame rotating due to wind can be suppressed, so the instability phenomenon of the photovoltaic power generation panel is also suppressed. Is done.

  Since the present invention is configured as described above so that the wind drag acting on the photovoltaic power generation panel does not work as much as possible, the vibration of the panel is suppressed, and thereby the span between the columns can be lengthened. And cost reduction can be achieved. If the span can be lengthened, the interval between the columns can be widened, and the solar power generation apparatus can be installed on the terrain having a difference in height.

Schematic installation explanatory front view showing one embodiment of a cable suspension type aerial solar power generation device according to the present invention Same schematic installation plan view It is a principal part enlarged view of FIG. 1, (a) is a front view of the suspension part of a photovoltaic power generation panel, (b) is the side view Side view of essential parts of FIG. The stay cable part of FIG. 1 is shown, (a) is a front view, (b) is a side view. Operational diagram of the embodiment Front view of suspension part of photovoltaic power generation panel of other embodiment Each block diagram of the support in the cable suspension type aerial photovoltaic power generation system Front view for explaining schematic installation showing other embodiments The arrangement | positioning aspect of the photovoltaic power generation panel which concerns on this invention is shown, (a) is a schematic installation explanatory front view, (b) is the elements on larger scale of (a).

Hereinafter, an embodiment of a cable suspension type aerial solar power generation device (facility) according to the present invention will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the cable-suspended aerial solar power generation apparatus of this embodiment has a pair of front and rear columns 1a, 1a, 1b, and 1b (general reference numeral 1) separated in the left-right direction. Cable 2a, 2b (generic symbol 2) respectively suspended between the suspension structure provided on the ground G and the left and right front columns 1a, 1a and the left and right rear columns 1b, 1b. ), And a frame 10 installed between the cables 2 a and 2 b before and after that, and a photovoltaic power generation panel P attached to the frame 10.

As for the installation mode of the column 1, a single column type (same figure (a)), a ramen column type (same figure (b)), a truss column type (same figure (c)), etc. are considered. In this embodiment, a truss column type is adopted. The suspension of the cable 2 to the support column 1 employs a conventionally known fastening / tensioning structure.
The frame 10 is disposed on the upper surface of the frame rod 11 between the pair of left and right frame rods (support beams) 11 and 11 and the pair of frame rods 11 and 11 laid between the front and rear cables 2a and 2b. It is a square frame with upper face purlins 12 and 12 comprising a pair of fixed purlins 12 and 12 and angle members 13 that connect and fix both ends of the pair of frame ridges 11 (see FIG. 2). On the pair of purlins 12 and 12, two photovoltaic power generation panels P arranged in parallel in the longitudinal direction are attached to the front and rear (left and right in FIG. 2). The attachment mode of this panel P is arbitrary, such as 6 lines other than 4 lines. Each attachment of the purlin member 12 to the frame rod 11 and the panel P to the purlin member 12 is performed by bolts, nuts, etc. as in the conventional fixed installation type (see FIG. 4).

  The frame 10 with the solar power generation panel P is suspended (suspended) on the cable 2 installed between the columns 1. 3, the suspension is performed by a pair of stop plates 15, 15, an adjustment plate 16, and a suspension bolt ((support rod) 17. First, the structure of the stop plates 15, 15 is used. Is clamped by the bolt 2 and the nut 18. Next, the suspension bolt 17 welded and fixed to the adjustment plate 16 is inserted into the angle member 13 and fastened by the nut 18a. The adjustment plate 16 is fastened and fixed to the stop plate 15 by fastening the elongated hole 19 through a bolt / nut 19a, and the position of the bolt 19a in the long hole 19 is fixed. Or the length of the suspension bolt 17 or the fastening position of the lower screw portion with the angle member 13 is adjusted so that the panel P is parallel to the surface of the ground G. In this embodiment, the ground Panel P since the surface (ground) is horizontal is horizontal.

In this embodiment, the cable 10 is attached to the cable 2 at two positions on the left and right sides of the frame 10, but the number is arbitrary as long as three or more. A stop plate 15 is fastened and fixed substantially at the center between the two suspension points (the suspension bolts 17) (see FIG. 3A). The stop plate 15 is attached to the frame 10 (angle member 13) by a wire 15a. When the suspension bolt 17 is disconnected from the frame 10 (panel P) for some reason, the frame 10 (panel P) is prevented from falling.
A high-damping rubber piece 14 is interposed between the frame rod 11 and the purlin member 12 and between the suspension bolt 17 and the angle member 13 to prevent bolt loosening and to absorb vibration (FIG. 3B). (See FIG. 4).

  As shown in FIGS. 1 and 5, a stay cable 30 is connected to the middle of the cable 2 and fixed to the ground G. The stay cable 30 is fastened and fixed to the cable 2 by a stop plate 31 having the same structure as the stop plate 15 and the like, and is fixed to the ground G by an anchor base 32. The stay cable 30 suppresses the occurrence of divergence that causes the entire frame 10 to rotate due to wind and the vibration of the panel P. In the figure, 33 is a shackle and 34 is a wire grip.

The cable suspension type aerial photovoltaic power generation apparatus of this embodiment has the above-described configuration. As shown in FIG. 1, the cable 2 has a self-contained structure, and the panel P is parallel to the ground (ground) G. Generate electricity by receiving sunlight.
On the other hand, when the wind w blows (when the airflow w is generated), the wind w usually flows along the ground surface (ground) (see FIG. 10), so the panel P (surface) is in that direction. This reduces the drag on the panel due to the wind w. For this reason, the vibration of the panel P is suppressed. That is, since the panel P has the inclination angle of the ground G (matched), the vibration of the panel is suppressed.

  At this time, in the left-right direction (left-right direction in FIG. 2), as shown in FIG. 6A, the wind (airflow) w that hits the side surface of the panel P is shunted at the corners of the side surface. There is also a gap on the lower side, the wind w is easy to flow, and the drag is kept small. The wind w flowing on the front surface (upper surface) of the panel P presses the panel P, and the wind w flowing on the rear surface (lower surface) has a gap between the frame wall 11 and the panel P, although there is the purlin 12, Since the side flows at a higher speed, the pressure is lower than the upper side, and the panel P is not given a large lift. For this reason, the panel P is pressed downward and the vibration given to the cable 2 is suppressed.

Further, in the front-rear direction (vertical direction in FIG. 2), as shown in FIG. 6B, the air flow w that hits the side surface of the panel P is divided at the corners of the side surface and flows on the front and back surfaces of the panel P. . At this time, the wind w flowing on the front surface (upper surface) of the panel P presses the panel P, and the wind w flowing on the rear surface (lower surface) hits the main building material 12 and reattaches to the main building material 12 and the like. This reattachment suppresses lift and the like on the panel P. Also in this case, the lower flow velocity is higher than the upper one, the lower pressure is reduced, and the panel P is pressed downward to suppress the vibration applied to the cable 2.
Due to the above action, the panel P of this embodiment hardly vibrates.
In addition, if the support | pillar 1 is also made into the cross-section of a horizontal cross section, it can be set as the structure which the peeling point and the reattachment point produced in one direction, and took measures against wind resistance.

In the cable suspension type aerial photovoltaic power generator of this embodiment, on the flat land along the coast, the cable span length L: 22.4 m, the cable gap: 7.11 m, and the height of the column 1: 4.5 m shown in FIG. The sag of cable 2 (the lowest descending length): 1.65 m was manufactured.
A small triaxial accelerometer was attached to this cable-suspended aerial photovoltaic power generator at a point of 1/6 × L (≈3.7 m) from the ends of the front and rear cables 2a, 2b. The accelerometer was installed at a position where the amplitude of the low-order mode that was excellent in the vertical direction was increased by vibration analysis performed in advance so that a plurality of modes could be calculated.
In the measurement, the basic characteristics were clarified by the vibration test, and the wind conditions were confirmed with an anemometer and anemometer installed on the top of the column, and the measured values were recorded simultaneously with the acceleration. In addition, about the measurement of acceleration, after the value more than 0.2G was detected by the accelerometer, about 200 second was measured with the sampling interval of 50 msec.

In this measurement, the wind speed was recorded at a maximum of about 33 m / s at the moment, but instability phenomena such as divergence and flutter did not occur. From the measurement results, the strong wind vibration was buffeting vibration, Even at times, the amplitude was small, and it was confirmed that it had sufficient wind-resistant stability. At present, no particular problem has occurred in the operation of this cable-suspended aerial solar power generation apparatus.
By this measurement, it can be expected that this cable-suspended aerial photovoltaic power generation device has the same wind-resistant and stable performance even in an area where strong winds are frequently generated.

  In the embodiment described above, the panel P is suspended downward (having a hanging type), but as shown in FIG. At this time, the upper bolt 17 ′ is a steel rod, the beam member 21 having the same shape as the frame rod 11 is provided on the lower surface of the angle member 13 by welding or the like, and the tubular member 22 is welded and fixed to the side surface of the beam member 21. The tubular member 21 is clamped with a nut 23 through an upper bolt 17 '. In the hanging type, the hanging bolt 17 can be a flexible wire as long as there is no hindrance, and the frame 10 (panel) by the wire 15a shown in FIG. P) fall prevention structure can be adopted.

  As shown in FIG. 2, this cable-suspended aerial solar power generation apparatus is configured in a space composed of four support columns 1 (1a, 1a, 1b, 1b). As shown in b), it is of course possible to suspend the panel P vertically and horizontally by placing three or more struts 1 in the left-right direction or three or more struts 1 in the front-rear direction. It is. Further, it goes without saying that the support system of the support column 1 can appropriately employ a cane type shown in FIG. 9A, an anchorage type shown in FIG.

  The cable-suspended aerial photovoltaic power generation apparatus of this embodiment is constructed on a flat land along the coast, but can also be installed in a place where a large space can be secured on the lower side, such as a parking lot or above a building. Of course, it can be installed between the two revetments of various rivers. In the case of a river, it can be installed between both sides of a mountain valley. If there is no hindrance to the sunshine problem, it can be installed on farms and ranches.

  In each of the installations, as described above, each photovoltaic power generation panel P is preferably inclined according to the inclination angle of the ground G on which the support column 1 is provided (the airflow along the surface of the ground G). For example, as shown in FIG. 10 (a), when the ground G of the undulating surface (ground) f is predicted to be inclined in the direction of the airflow w, the panel P is adjusted to the direction of the airflow w. By installing, the drag to the panel P by wind can be suppressed. At that time, as shown in the figure, the support rod 17 is preferably in the vertical direction (the direction of gravity), and the inclination angle of the panel P is determined in consideration of the inclination of the ground surface (ground) f. (By predicting the direction of the air flow w by fluid analysis or the like) and setting the tilt angle to the set inclination angle by adjusting the length of the support rod 17 or adjusting the position of the bolt 19a in the long hole 19 or the like. To do. Further, as shown in FIG. 2B, it is preferable that the height h of the center of each panel P and the cable 2 (center line indicated by a chain line of the support rods 17 and 17) is constant. When the ground f is flat, the panel P is generally parallel to the ground surface.

As a means for attaching the panel P to the cable 2, the frame 10 and the panel P are separately assembled at various factories, and they are hung at a predetermined position by a crane. The cable is stretched over time, and the bolts 18 and 19a are attached by a movable scaffold.
Incidentally, it should be thought that embodiment disclosed this time is an illustration and restrictive at no points. It goes without saying that the scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1, 1a, 1b Post 2, 2a, 2b Cable 10 Frame (frame)
11 Frame 杆 (support beam)
12 Purlin material 13 Angle material 15 Stop plate 17 Suspension bolt (support rod)
19 Long hole 30 Stay cable

Claims (4)

Between the suspension structure provided on the ground (G) by separating the pair of front and rear columns (1, 1a, 1b) in the left-right direction, the left and right front columns (1a, 1a), and the left and right rear columns A cable (2, 2a, 2b) suspended between the columns (1b, 1b), a frame (10) installed between the cables (2a, 2b) before and after the cable, and the frame (10) In a cable suspension type aerial photovoltaic power generation device comprising a photovoltaic power generation panel (P) attached to
The frame (10) includes a pair of left and right frame rods (11, 11) installed between the front and rear cables (2a, 2b) and a pair of frame rods (11, 11). A cable-suspended aerial photovoltaic power generation apparatus comprising a purlin member (12, 12) fixed to the upper surface of (11), wherein the solar power generation panel (P) is provided on the upper surface of the purlin member (12).   The cable-suspended aerial solar power generation device according to claim 1, wherein each of the solar power generation panels (P) is matched with an inclination angle of the ground (G) provided with the support column (1).   Front and rear and left and right sides of the frame (10) are attached to the front and rear cables (2a and 2b) via vertical support rods (17 and 17 '), respectively, and one end of the support rod is attached to the frame (10). The other end of the support rod (17, 17 ′) is fixedly fixed to the adjustment plate (16). The adjustment plate (16) clamps the cables (2a, 2b) with bolts (18). The cable-suspended aerial solar power generation device according to claim 1 or 2, wherein the cable-suspended aerial solar power generation device is fastened and fixed to a fastening plate (15, 15) fastened by a bolt and nut (19a) through a long hole (19).   The cable according to any one of claims 1 to 3, wherein a stay cable (30) from the middle of the cable (2) suspended between the left and right struts (1, 1) is fixed to the ground (G). Suspension type aerial solar power generator.

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