WO2023096294A1

WO2023096294A1 - Agrivoltaic system capable of storing electrical energy

Info

Publication number: WO2023096294A1
Application number: PCT/KR2022/018454
Authority: WO
Inventors: 강희동
Original assignee: (주)제이에스파워
Priority date: 2021-11-23
Filing date: 2022-11-22
Publication date: 2023-06-01
Also published as: KR102468463B1

Abstract

The present invention provides an agrivoltaic system comprising: a column the bottom of which is installed in the ground; a frame which is installed at the top side of the column; a photovoltaic unit which is mounted to the frame and produces electrical energy; and an energy storage device which is disposed within the column, is connected to the photovoltaic unit, and stores energy produced by the photovoltaic unit, wherein the column is formed by a PU pipe made of a polyurethane resin.

Description

Agricultural solar system capable of storing electrical energy

The present invention relates to an agricultural solar system capable of storing electrical energy.

Germanium absorbs static electricity by providing negative ions (OH-) that neutralize positive charges generated in relation to the radiation of harmful electromagnetic waves by radiant heat corresponding to a wavelength of 5.6-15 microns. can be removed. In general, photovoltaic structures include pillars and superstructures.

The poles are fixed to the ground, frames of various structures are assembled on the upper side of the poles, and solar panels capable of generating electric energy are installed on the frames.

These photovoltaic structures have recently been expanded to agricultural fields.

In solar structures installed on farmland, electric energy produced by solar panels can be transmitted to the outside or used directly for farming, such as raising groundwater needed for farming.

Therefore, even in areas where water is scarce or dry, such as deserts, if these solar structures are used, vegetables and various crops can be grown and harvested.

By using these photovoltaic structures, it is possible to build an agricultural photovoltaic system suitable for the local area in any region of the world.

On the other hand, agricultural solar systems are generally equipped with an energy storage system (ENERGY STORAGE SYSTEM), and electrical energy produced from solar panels is stored in the energy storage system, and a method of using electrical energy more efficiently is being studied. .

However, conventional agricultural photovoltaic systems have problems in that there is a risk of electric shock to workers farming in farmland, it is difficult to transport heavy steel poles, and the installation cost of the system is high.

Meanwhile, the background technology of the present invention is disclosed in Korean Patent Publication No. 10-2021-0044550.

SUMMARY OF THE INVENTION The present invention has been created to solve the above-described problems, and provides an agricultural solar system capable of reducing the risk of electric shock to workers who farm in farmland and storing electrical energy that is easy to install.

An agricultural solar system according to an embodiment of the present invention includes a pole with a lower part installed on land; A frame installed on the upper side of the pillar; a photovoltaic power generating unit in which the frame is installed to produce electric energy; and an energy storage device disposed inside the pillar and connected to the photovoltaic power generation unit to store energy produced by the photovoltaic power generation unit, wherein the pillar is composed of a PU pipe made of polyurethane resin. to be characterized

The pillars include a first pillar whose lower side is disposed on the land, a second pillar spaced apart from the first pillar and located on the upper side of the first pillar, and an upper part of the first pillar inserted into the lower part. It may include a connection case inserted into the lower portion of the second pillar.

The method may further include a nozzle unit installed in the frame and a motor unit receiving power from the energy storage system and supplying fluid to the nozzle unit through a flow path of a tension pipe connected to the nozzle unit.

An agricultural photovoltaic system capable of storing electric energy according to an embodiment of the present invention can reduce the risk of electric shock to workers who farm in farmland.

An agricultural photovoltaic system capable of storing electric energy according to an embodiment of the present invention is an insulator, has excellent strength and elasticity, and uses lightweight PU pipes as pillars, so construction is easy and eco-friendly.

Since an energy storage system is built into a pillar, the agricultural solar system capable of storing electric energy according to an embodiment of the present invention can utilize space highly and minimize damage in case of fire.

1 is a perspective view of an agricultural solar system capable of storing electrical energy according to an embodiment of the present invention;

FIG. 2 is a view excluding the photovoltaic power generation unit of the agricultural solar system capable of storing electrical energy of FIG. 1;

FIG. 3 is a view for explaining a pole of the agricultural solar system capable of storing electrical energy of FIG. 1;

Figure 4 is a view for explaining the connection case of the column of Figure 3,

FIG. 5 is a partial block diagram of the agricultural photovoltaic system of FIG. 1 capable of storing electrical energy.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to components of each drawing, it should be noted that the same components have the same numerals as much as possible even if they are displayed on different drawings.

And, in describing the embodiments of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with understanding of the embodiment of the present invention, the detailed description will be omitted.

Also, terms such as first, second, A, B, (a), and (b) may be used to describe components of an embodiment of the present invention. These terms are only used to distinguish the component from other components, and the nature, order, or order of the corresponding component is not limited by the term.

Hereinafter, an agricultural solar system capable of storing electric energy according to an embodiment of the present invention will be described with reference to the drawings.

1 is a perspective view of an agricultural solar system capable of storing electrical energy according to an embodiment of the present invention, and FIG. 2 is a view of the agricultural solar system of FIG. 1 excluding the photovoltaic power generation unit capable of storing electrical energy, FIG. 3 is a view for explaining a pole of the agricultural solar system capable of storing electric energy of FIG. 1 , FIG. 4 is a view for explaining a connection case of the pole of FIG. 3 , and FIG. 5 is a view for explaining the electric energy of FIG. 1 It is a partial block diagram of an agricultural solar system that can be stored.

1 to 5, an agricultural solar system (100, hereinafter referred to as “agricultural solar system”) capable of storing electrical energy according to an embodiment of the present invention includes a pillar 110, a frame (120), photovoltaic power generation unit 130; and an energy storage system 140 .

The lower part of the pillar 110 may be installed on land such as farmland.

Specifically, it may be installed by digging a hole to a depth of 1.5m to 2m in land such as farmland with an auger or the like, inserting the lower side of the pillar 110 into the hole, and burying it.

The pillar 110 may be made of non-conductive material.

When the pole 110 is made of non-conductive material, even if it rains or works in water, an electric shock accident due to leakage current generated from electrical equipment such as the photovoltaic power generation unit 130 and the energy storage system 140 can be prevented. It can be prevented.

Specifically, the pillar 110 may include a pipe manufactured by using at least one of polyurethane resin (PU), epoxy resin, and vinyl ester resin through a filament winding method.

For example, a PU pipe made of polyurethane resin (PU) is manufactured through a filament winding method using polyurethane resin (PU) as a raw material, so it has excellent strength and elasticity, and has excellent impact resistance, durability, and resilience. It has great advantages.

In addition, the PU pipe has the advantage of being easy to transport and construct because it is lightweight due to the nature of the material.

The pillar 110 may include a first pillar 111 , a second pillar 112 , and a connection case 113 .

The first pillar 111 and the second pillar 112 may be made of the PU pipe, and the connection case 113 may be made of a metallic material.

When the second pillar 112 is formed of the PU pipe, heat transfer by conduction from the frame 120 and the photovoltaic power generation unit 130 can be blocked.

Therefore, it is possible to prevent the temperature inside the pillar 110 from excessively increasing in summer.

The first pillar 111 has a first space 111s formed therein, and the first space 111s becomes narrower toward the upper side.

The lower side of the first pillar 111 may be installed on land.

Specifically, the lower side of the first pillar 111 may be inserted into a hole formed to a depth of 1.5m to 2m in land such as farmland and buried in such a way that it may be installed.

The first pillar 111 may have a shape in which both sides symmetrical with respect to an internal central axis are inclined. That is, the first pillar 111 may have a tapered shape.

The second pillar 112 also has a second space 112s formed therein, and the second space 112s becomes narrower toward the upper side.

Specifically, the second pillar 112 may have a shape in which both sides symmetrical with respect to an internal central axis are inclined. That is, the second pillar 112 may have a tapered shape.

The upper part of the first pillar 111 may be inserted into the lower part of the connection case 113 , and the upper part of the connection case 113 may be inserted into the lower part of the second pillar 112 .

When the first pillar 111 and the second pillar 112 are coupled to the connection case 113, the lower inner surface of the connection case 113 is in contact with the circumference of the upper outer surface of the first pillar 111. The upper outer surface of the connection case 113 is in contact with the circumference of the lower inner surface of the second pillar 112 .

Also, a first jaw 113a may be formed on a lower inner surface of the connection case 113, and a second jaw 113b may be formed on an upper outer surface of the connection case 113.

Specifically, the first jaw 113a is formed around the lower inner surface of the connection case 113, and the second jaw 113b is formed around the upper outer surface of the connection case 113.

The first jaw 113a is formed around the lower inner surface of the connection case 113 to correspond to the upper end of the first pillar 111 . And, the first jaw 113a comes into contact with the upper end of the first pillar 111 to fix the position when the upper side of the first pillar 111 is inserted into the connection case 113.

The second jaw 113b is formed around the upper outer surface of the connection case 113 to correspond to the lower end of the second pillar 112, and is in contact with the lower end of the second pillar 112 to form the connection case ( 113) fixes the position when the upper side is inserted into the lower side of the second pillar 112.

An installation space 113s is formed inside the connection case 113, and electrical equipment such as the energy storage system 140 may be located in the installation space 113s.

If the energy storage system 140 and the like are distributed and arranged in the connection case 113 of the pillar 110 in this way, a separate space for installing electrical equipment such as the energy storage system 140 is not required. In addition, heat generated in the energy storage system 140 and the like can be dissipated, and even if a fire occurs, damage caused by fire can be minimized because it is limited to only a part of the pillar 110.

The connection case 113 may include a body 1131 and a door 1132.

The body 1131 and the door 1132 are connected through a hinge.

Therefore, by opening the door 1132, maintenance of electrical equipment such as the energy storage system 140 installed in the mounting space 113s can be facilitated.

Meanwhile, a plurality of air inlets 113h may be formed in the connection case 113 (see FIG. 4 ).

The air inlet 113h may be inclined upward from the outside to the inside.

Accordingly, rainwater or agricultural water supplied from a sprinkler or nozzle may be prevented from being introduced into the connection case 113 through the air inlet 113h.

An air outlet 112h may be formed on the upper side of the second pillar 112 .

Specifically, a cover 1121 may be mounted on the upper side of the second pillar 112, and the plurality of air outlets 112h may be formed on the lower side of the cover 1121.

Therefore, when the internal temperature of the connection case 113 rises, the high-temperature air rises and is discharged through the air outlet 112h, and the external low-temperature air flows through the plurality of air inlets 113h. It may flow into the case 113.

Therefore, it is possible to prevent electrical equipment such as the energy storage system 140 installed in the mounting space 113s from being damaged by heat.

Also, the cover 1121 may prevent rainwater from flowing into the pillar 110 .

Meanwhile, the pillar 110 may further include a tension pipe 114.

The lower end of the tensile pipe 114 is fixed to the lower side of the first pillar 111, and the upper end of the tensile pipe 114 is fixed to the cover 1121.

Specifically, a support plate 1111 may be installed below the first pillar 111, and a lower end of the tension pipe 114 may be screwed to the support plate 1111.

The upper end of the tension pipe 114 and the cover 1121 are screwed together, and when the cover 1121 is rotated, the cover 1121 presses the second pillar 112 downward, The first pillar 111, the second pillar 112, and the connection case 113 may be strongly coupled to each other.

A flow path through which fluid can flow is formed inside the tension pipe 114 .

The frame 120 is installed on the upper side of the pillar 110 .

Specifically, the frame 120 may be made of a plurality of steel pipes. The frame 120 may be adjusted such that the photovoltaic power generation unit 130 is perpendicular to the incident angle of the sun.

A solar panel of the photovoltaic power generation unit 130 may be installed on the frame 120 to produce electrical energy using incident sunlight.

The energy storage system 140 is disposed inside the pillar 110 and is connected to the solar power generation unit 130 to store energy generated by the solar power generation unit 130 .

The energy storage systems 140 are each distributed inside the pillars 110 .

Through the energy storage system (ENERGY STORAGE SYSTEM 140), excessively produced power can be stored, and then the stored power can be transmitted to an external load or directly used for farming.

The energy storage system 140 is composed of an energy storage source (Battery), a power conditioning system (PCS), a battery management system (BMS), a power management system (PMS), and the like. It can be.

The energy storage source (Battery) may be composed of LiB (lithium ion battery), NaS (sodium sulfur battery), lithium polymer, lithium iron phosphate (LFP), Super Capacitor, and the like.

A power conditioning system (PCS) may supply power stored in an energy storage source to an external power system or store power from an external power system in an energy storage source.

A battery management system (BMS) measures the voltage, current, temperature, etc. of the energy storage source, diagnoses the safety state and failure of the energy storage source, and controls the temperature and cell balancing of the energy storage source. .

In addition, the power management system (PMS) may integrally manage a power conditioning system (PCS) and a battery management system (BMS) and communicate with the outside.

The agricultural solar system 100 capable of storing electrical energy may further include a pump unit 150 and a nozzle unit 160 .

The nozzle unit 160 may be installed on the frame 120 .

The nozzle part 160 is connected to the tension pipe 114 and can provide fluid such as water supplied through the passage of the tension pipe 114 to farmland.

The pump unit 150 may be connected to the energy storage system 140 and driven by receiving electrical energy from the energy storage system 140 .

The pump unit 150 may supply underground water or a liquid such as fertilizer or pesticide liquefied in an agricultural container to the passage inside the tension pipe 114 .

In the above, even though all the components constituting the embodiment of the present invention have been described as being combined or operated as one, the present invention is not necessarily limited to these embodiments. That is, within the scope of the object of the present invention, all of the components may be selectively combined with one or more to operate.

In addition, all terms including technical or scientific terms described above have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Commonly used terms, such as terms defined in a dictionary, should be interpreted as being consistent with the contextual meaning of the related art, and unless explicitly defined in the present invention, they are not interpreted in an ideal or excessively formal meaning.

In addition, the above description is merely an example of the technical idea of the present invention, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed according to the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

Claims

Poles with lower parts installed in the ground;

A frame installed on the upper side of the pillar;

a photovoltaic power generation unit for generating electric energy by installing the frame; and

An energy storage device disposed inside the pillar and connected to the photovoltaic power generation unit to store energy produced by the photovoltaic power generation unit,

The agricultural solar system, characterized in that the pillar is composed of a PU pipe made of polyurethane resin.
The method of claim 1,

the pillar,

The first pillar, the lower side of which is placed on the land;

A second pillar spaced apart from the first pillar and located above the first pillar;

An agricultural solar system comprising a connection case in which an upper part of the first pillar is inserted into the lower part and a connection case in which the upper part is inserted into the lower part of the second pillar.
The method of claim 1,

A nozzle unit installed on the frame;

and a motor unit configured to receive power from the energy storage system and supply fluid to the nozzle unit through a flow path of a tension pipe connected to the nozzle unit.