JP2020129963A - Solar power generation system - Google Patents

Abstract

To provide a solar power generation system for solar sharing, which has a module (panel) for solar power generation installed on a position higher than the ground by several meters, and which does not have a module simply fixed horizontally and installed as a countermeasure against the attack of a huge typhoon, but has the module installed so as to maintain the inclination to maintain a self-cleaning function of a light receiving surface, and in consideration of avoiding a reduction of a power generation amount, and retaining a strength at the time of snow accumulation, as the countermeasure.SOLUTION: The solar power generation system includes: not simply installing the module horizontally in order to improve a wind-resistant performance, but reducing an amount of the module projecting from the upper surface of the beam of the frame so that wind does not directly hit inside the thickness (vertical height) of the beam on the upper surface of the frame and the module to reduce a horizontal load by the wind in a direction of solar radiation, in order to reduce the total wind pressure load by the module and the frame; and setting the lower surface of the frame on the opposite side of the module so as to be equal to or lower than the upper surface of the frame beam, thereby greatly reducing a lifting power which works to pull off the module and a horizontal force which works to tilt the frame by the north wind, and improving the wind-resistant performance.SELECTED DRAWING: Figure 1

Description

An object of the present invention is to rationally configure a photovoltaic power generation system to improve wind resistance, reduce installation costs, and reduce maintenance costs.

In order to promote the spread of photovoltaic power generation, the total introduction cost should be 10,000 times the kWh unit price of selling electricity. For example, in order to implement a power sale unit price of 20 yen/kWh that is lower than the average power purchase unit price, one goal is to reduce the introduction cost to about 200,000 yen/kW or less.
Photovoltaic power generation is priced by using semiconductor grade silicon (purity 99.999999999% (11N) or more), which is a material for ICs, etc. Has fallen sharply, and finally it has been evaluated as the cheapest power generation method compared to all power generation methods, and future development is beginning to be expected more and more as a core power generation method of a "society consisting only of renewable energy". ..
Under these circumstances, in order to prevent severe natural disasters as well as the life problems of fossil fuels, which are said to be exhausted in about 200 years from now, we aim to reduce carbon dioxide emissions to zero and rapidly reduce the amount used. This has emerged as the most important issue, and it is necessary to rationalize solar power generation.

A large area of land is required to perform solar power generation, and as a site there is initially a rooftop of a house, then a mega solar that uses industrial and primary industry idle land can be made everywhere, and then Japan Since the purchase price is quite high according to the common sense in the world, we have cut down the satoyama, destroyed the mountain and created it with foreign capital that can be procured cheaply. At this point, solar power generation has become a “natural energy that destroys nature” and many local governments feel the necessity for environmental assessment and are considering regulations such as regulations. If Megasola is made on a flat ground, the entire site will be paved, weed-proof sheets will be laid, and herbicides will be sprayed frequently in order to prevent the panels from being buried due to the overgrowth of weeds and vines. In order to use the plant as a solar power generation site, it is necessary to cut down forests, break down mountains, create nature, destroy nature, and take measures against weeds after installation, resulting in the risk of sediment disaster due to rain. An increased barren earth will emerge.

Now that solar power generation is cheaper than all power generation methods, it has become an eternal energy acquisition method for humankind as an alternative to power generation using nuclear power or fossil fuels, but in order to realize it, “without destroying nature It is necessary to secure vast land for power generation in a “coexisting form”.
Among them, as a method to overcome the drawback, a solar power generation module is installed in the air to generate solar power in the air, and the land underneath is used for the original purpose of "solar sharing". With a wide range of ideas, and with the support of society, we are finally in the stage of diffusion. The application of the solar sharing method has become a recommended method because it can coexist with nature and can prevent damage caused by flooding.

JP 2005-270038 A Japanese Unexamined Patent Publication No. 2015-216766

In a solar-sharing solar power generation system that installs solar power generation modules (panels) several meters above the ground, against a storm with a maximum wind speed of 80 m/sec or more at the time of a huge typhoon or other storm caused by recent global warming Instead of using a heavy-duty steel or concrete foundation for the frame or simply fixing the module horizontally, the inclination should be maintained to maintain the self-cleaning function of the light-receiving surface and the amount of power generation should be reduced. There is a problem to be taken in consideration of avoiding the decrease and maintaining the strength during snowfall.

In Patent Document 1, in order to reduce the wind pressure load, the module is held at a predetermined inclination by a spring, and when the wind is strong, it has a structure that resists the force of the spring and becomes horizontal by the force of the wind. Structurally, it is not possible to maintain completely horizontal by the component force of the spring extending and returning to the wind streamline, and also to vibrate due to fluctuations in wind speed to maintain the wind pressure load to the minimum. Was insufficient.
In Patent Document 2, since the actuator is fixed to the pedestal, when the module angle is changed due to snow or the like, the reaction force for changing acts on the pedestal to disassemble, and a pedestal such as a temporary pipe assembled by friction welding is installed. Has a structural weak point that the pedestal is deformed due to the joining member coming off or the position changing, and because many modules rotate at once, the operating load of the actuator exceeded the set value due to some malfunction. At this time, there is a problem that it takes a lot of time to find the part that causes it and the maintenance and inspection cost is increased. In addition, in order to move a large number of modules at once, the number of steps for assembling the interlocking rod and the rotating member increases, which increases the installation cost, and there is also a problem that part of the modules vibrates due to strong wind due to the total play of the link mechanism. In addition, since the interlocking link is used because of the mechanism, when the rotation angle of the module exceeds about 90 degrees, the force required for the rotation becomes remarkably large, and it remains a problem that the mechanical efficiency decreases.

In order to reduce the total of the wind pressure load of the pedestal to install the module and the module in order to improve the wind resistance, in order to reduce the total wind pressure load of the pedestal to install the module, In order to prevent the wind from hitting directly, the amount of protrusion from the top surface of the trestle beam is reduced to reduce the horizontal load due to the south wind, and the lower side of the north side of the module frame is set to be below the top surface of the trestle beam. The lift force to peel off and the horizontal force to tilt down the stand are reduced to improve wind resistance.

By setting the module to a gentle inclination of several degrees, the self-cleaning function of the light receiving surface due to rainfall and the wind resistance are improved, and the snow load performance is maintained, and the instantaneous maximum wind speed of 80 m/ A device capable of withstanding seconds is enabled.

FIG. 1 is a side view of an essential part from the east of the first embodiment of the present invention. FIG. 2 is a perspective view showing the positional relationship before mounting the module according to the first embodiment of the present invention. FIG. 3 is a perspective view of a module fixing member used in the first embodiment of the present invention. FIG. 4 is a side view of an essential part of the second embodiment of the present invention from the east. FIG. 5 is a perspective view of a module fixing member used in the second embodiment of the present invention. FIG. 6 is a perspective view of an essential part from the east of the second embodiment of the present invention. FIG. 7 is a side view showing a method of reinforcing a column. FIG. 8: is a figure which shows the module mounting state of the conventional solar sharing.

Installed so that the aluminum frame of the module designed to withstand snow load and wind pressure load is almost the same as the upper surface of the beam of the pedestal, the aluminum frame on the north side of the module is almost the same as the upper surface of the beam of the pedestal on the north side. Fix it so that it does not come out.

FIG. 1 is a side view from the east side of the first embodiment of the present invention, in which the upper end 3a of the upper end of the module 3 is approximately equal to the upper surface of the beam 1 of the gantry, and the lower part 3b of the aluminum frame on the north side of the module is By selecting an inclination that substantially matches the upper surface of the beam 1 and fixing the module with the L-shaped module fixing member 2, the module is prevented from collapsing due to the horizontal component force of an excessive wind load in the south wind. The north wind blows into the lower side of the module 3 to prevent the lift force that blows the module 3 away, and the waterside component force is suppressed to prevent the collapse. Further, the pillar member is not separated from the beam material to improve the cross-sectional performance to strengthen it, but the place where there is a danger of exceeding the allowable stress is cut into a suitable length from the same material as the pillar, and the reinforcing member 6 is formed into pillars 4 and 2. By bundling them heavily, the stress of the columns 4 due to the horizontal force of the excessive wind load is reduced to prevent collapse.

As shown in Fig. 4, by using the module fixing member 2c that can set the relative positions of the module and the beam by widening the pitch of the two holes in the center of the side of the beam, the module can be installed horizontally under excessive wind load in the south wind. The pedestal is prevented from collapsing due to the component force in the direction, the north wind does not blow into the lower side of the module 3 and the lift force that blows off to the module 3 is not generated, and also the waterside component force is suppressed to prevent the collapse.

In FIG. 6, the module is mounted on both sides of the beam without using the L-shaped metal fittings as described above, and the module is fixed at a predetermined position on the upper side of the beam by using integral module fixing members 2a. The structure is such that the upper and lower relative positions of the module and the beam can be freely set while avoiding the constraint of installing the fixing screw member in the middle part of the side surface of the beam.

This device is effective not only for farming type solar power generation but also for three-dimensionally using any land as a solar power generation site, as a permanent eternal renewable energy acquisition method that can coexist with nature without destroying nature. It becomes an indispensable means. In this sense, the word "solar sharing" is inevitably created as a term having a broader meaning than "farming farming", and has become popular as a plan to use land as a three-dimensional power generation site worldwide.

On the other hand, in the low latitudes of the tropics, too strong sunlight hinders the growth of crops, which easily causes hunger, poverty, and looting.However, the widespread use of this device makes it possible to obtain abundant temperate crops. There is a high possibility that many problems will be solved if new farming can be developed.

With the widespread use of this system, which is inexpensive and resistant to natural disasters, we can expect to realize a natural energy society using solar power.

Japan's annual electricity consumption is approximately 100 billion kWh/year, but if we calculate it as the amount of power generation per solar sharing area of 40 kW/anti, the required area is only 2.5 million hectares, and the total area of farmland is 4.6 million hectares. If it becomes a society that is sufficiently small compared to the above and obtains infinite power from farmland, agriculture will become an attractive industry for young people as an originally attractive industry, and it will be possible to revive rural villages by retaining young people.

In order to prevent global warming and build a decarbonized society as soon as possible, solar sharing will coexist with nature further, making use of its strong characteristics against natural disasters, and this plan makes it possible to support a maximum wind speed of 80 m/s at a low cost. It is possible to build a complex system.

1 Horizontal beam of the frame 2a Bolt hole for fixing the module fixing bracket and the beam 2b Bolt hole for connecting the module fixing bracket and the module 2c Surface for fixing the module 3 Solar power generation module 3a Line on the upper surface of the solar radiation side frame
3b Module lower line on the side opposite to the direction of solar radiation 3d Module frame 4 Pillars 5 Cheeks 6 Pillars with the same cross-sectional shape

Claims (2)

In a photovoltaic power generation system with multiple modules that do not change the inclination of the photovoltaic power generation module on a pedestal approximately 3 m above the ground, the aluminum frame in the solar radiation direction of the module is approximately the same height as the "top surface of the horizontal beam 1 of the pedestal". Or, set it so that it is slightly lower than the upper surface, and set the " lower part of the aluminum frame of the module" on the opposite side of the solar radiation direction so that it does not rise above the upper surface of the horizontal beam 1, while maintaining the self-cleaning function of rainwater of the module. , The horizontal component of the wind load applied to the frame of the module during the south wind is reduced, and the blowing of the wind to the lower side of the module 3 is reduced in the north wind, and a large upward wind load is applied to the module and A photovoltaic power generation system with reduced power and improved wind resistance. Of the wind load applied to the gantry, as a means to keep the bending stress of the gantry column due to the horizontal component force below the proof stress of the material, instead of making the column thicker to improve the cross-sectional performance, the same cross section as the column in the wind direction is used. The cradle structure for satisfying claim 1, wherein the reinforcing member (6) for performance is closely fixed to a column to have a structure capable of withstanding a windstorm of 60 m/sec or more.