WO2020197047A2

WO2020197047A2 - Solar power generation system

Info

Publication number: WO2020197047A2
Application number: PCT/KR2019/017886
Authority: WO
Inventors: 윤창복
Original assignee: 솔라시도코리아 주식회사
Priority date: 2019-03-25
Filing date: 2019-12-17
Publication date: 2020-10-01
Also published as: KR20200113314A; KR102236725B1; WO2020197047A3

Abstract

The present invention relates to a solar power generation system comprising: a plurality of solar panels for collecting energy from sunlight to produce power; a power detection unit for generating a power detection signal corresponding to a voltage and a current produced by the solar panels; a monitoring unit for identifying, through a CCTV monitor, whether the solar panels are covered by snow; a reverse bias supply unit for melting accumulated snow by transferring a current of a battery to the side of a solar cell; a control unit for controlling the power detection unit, the monitoring unit, the battery, the reverse bias supply unit, and a communication unit; the communication unit for wirelessly transmitting the power detection signal; and a server for instructing the control unit to perform a snow melting operation when the solar panels are covered by snow, and determining whether a corresponding solar panel is abnormal, through the power detection signal.

Description

Solar power generation system {SOLAR POWER GENERATION SYSTEM}

The present invention relates to a photovoltaic power generation system, and more particularly, to a photovoltaic power generation system that has a heat dissipation and snow removal function and monitors the presence or absence of an abnormality in a solar panel.

Recently, due to the acceleration of global warming and limited resources, interest in renewable energy, an eco-friendly energy, is increasing. Among them, the solar power generation system, which has the characteristics of fuel-free, pollution-free, noise-free and vibration-free, has the advantages of easy expansion, semi-permanent use, and low maintenance costs.

Since these solar power generation systems are installed in a state exposed to the outside, they are very vulnerable to natural disasters. For example, in winter, due to the snowfall on the solar module, a reduction in solar power generation and a collapse of the support are caused, so research on the development of a snow removal device for the solar module is required.

However, there is a snow removal device using a wiper as a snow removal device of a conventional solar module, but there is a concern that the wiper operation is stopped or the wiper is damaged when snow accumulated on the solar panel is frozen. Accordingly, there is a need for a snow removal device for a photovoltaic module capable of automatically performing a snow removal function by determining whether there is snowfall in the photovoltaic module.

In addition, in solar power generation, part of light energy is converted into thermal energy during the power generation process, which increases the temperature of the solar panel. As the temperature of the panel increases, the power generation output decreases. A technique of directly cooling the solar panel was applied.

However, in the cooling method using a sprinkler installed for cooling, a separate facility is installed to spray coolant, and there is an inconvenience of spraying the coolant according to a predetermined period.

In particular, since most of the solar power generation in Korea is installed in mountainous areas with high sunlight or in places far from the city center, it is expensive to secure cooling water if there is not a smooth supply of continuously consumed cooling water. There is a drawback that can only be used in a limited way. Therefore, in order to improve the efficiency of the solar panel, a technology for lowering the temperature is required.

On the other hand, there is a problem in that the solar power generation system operates in an inefficient state due to a failure or a defective state in which individual solar panels occur.

An object of the present invention for solving the above problems is to provide a solar power generation system that improves solar power generation efficiency by applying a heating sheet and a nonwoven fabric and a snow removal function to a solar panel.

In addition, another object of the present invention is to provide a solar power generation system capable of measuring an abnormal state of an individual solar panel and monitoring the measured abnormal state from a remote location.

The solar power generation system of the present invention for achieving the above object comprises a plurality of solar panels for generating power by collecting energy from sunlight; A power sensing unit that generates a power sensing signal corresponding to the voltage and current produced by the solar panel; A monitoring unit that checks whether there is snow on the solar panel through a CCTV monitor; Reverse bias supply unit for melting snow accumulated by sending a current from the battery to the solar cell; A control unit for controlling the power sensing unit, a monitoring unit, a battery, a reverse bias supply unit, and a communication unit; A communication unit wirelessly transmitting the power detection signal; And a server that instructs the control unit to perform snow melting when snow is snowed on the solar panel, and determines whether there is an abnormality in the solar panel through a power detection signal.

The solar panel may be formed by laminating in the order of frame, glass, front EVA, solar cell, rear EVA, heating sheet, back sheet, and nonwoven fabric.

The heating sheet may be formed in a circular or rectangular pattern.

The heating sheet may include 10 to 20 parts by weight of graphite, 10 to 50 parts by weight of a binder, 5 to 25 parts by weight of carbon black, and 20 to 60 parts by weight of carbon nanotubes.

The nonwoven fabric may include 30 to 70 parts by weight of carbon fiber, 10 to 50 parts by weight of a binder, and 5 to 25 parts by weight of carbon black.

The reverse bias supply unit receives solar energy, converts it into electric energy, and supplies battery electricity charged in reverse to each solar cell to heat the solar cell to melt snow.

The server may periodically receive the power detection signal of the power detection unit, determine whether there is an abnormality in the corresponding solar panel, and transmit it to the administrator mobile phone.

As described above, according to the present invention, the heat generated during the solar power generation process can be effectively reduced by applying the heating sheet and the nonwoven fabric to the solar panel, thereby improving the quality guarantee period, lifespan, and power generation efficiency of the solar panel.

In addition, according to the present invention, the snow removal function removes snow accumulated in winter to improve solar power generation efficiency, and the electrical abnormality of individual solar panels can be measured and monitored from a remote location, thereby optimizing the operation state of individual solar panels. It can be managed to be in a state of.

1 is a configuration diagram of a solar power generation system according to the present invention.

2 is an exploded perspective view of a solar panel according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement the embodiments of the present invention. However, the present invention may be implemented in various different forms, and is not limited to the embodiments described herein.

Then, a solar power generation system according to an embodiment of the present invention will be described in detail.

1 is a configuration diagram of a solar power generation system according to the present invention, and FIG. 2 is an exploded perspective view of a solar panel according to the present invention.

1 and 2, the photovoltaic power generation system according to the present invention includes a plurality of photovoltaic panels 100 that collect energy from sunlight to generate power, and are produced by the photovoltaic panel 100. A power detection unit 210 that generates a power detection signal corresponding to voltage and current, a monitoring unit 220 that checks whether there is snow on the solar panel 100 through a CCTV monitor, and the current of the battery 230 A control unit 250 for controlling the reverse bias supply unit 240 sent to the battery to melt the accumulated snow, the power sensing unit 210, the monitoring unit 220, the battery 230, the reverse bias supply unit 240, and the communication unit 260 ), and the communication unit 260 for wirelessly transmitting the power detection signal, and when snow is snowed on the solar panel 100, the control unit 250 instructs the snow melting operation, and the corresponding solar panel through the power detection signal It is configured to include a server 270 that determines the presence or absence of 100 abnormalities.

The solar panel 100 includes a frame 110, a glass 120, a front EVA 130, a solar cell 140, a rear EVA 150, a heating sheet 160, a back sheet 170 ) And the nonwoven fabric 180 are sequentially stacked. Here, the frame 110, the glass 120, the front EVA 130, the solar cell 140, the rear EVA 150, and the back sheet 170 constituting the solar panel 100 are widely known technologies. Detailed description will be omitted.

The heating sheet 160 includes graphite, a binder, carbon black and carbon nanotubes, which are a heating paste composition, and preferably 10 to 20 parts by weight of graphite, 10 to 50 parts by weight of a binder, 5 to 25 parts by weight of carbon black Parts and 20 to 60 parts by weight of carbon nanotubes may be included.

Here, the heating sheet 160 may be formed by printing, drying and curing the heating paste composition in a desired pattern. In this case, the heating sheet 160 may be formed in a circular or rectangular pattern in order to increase the heat dissipation effect, but is not limited thereto.

As the binder, at least one of epoxy, epoxy acrylate, polyvinyl acetal, and phenol resin may be used.

The carbon nanotubes may have a diameter of 5 nm to 40 nm and a length of 3 μm to 50 μm. At this time, it is preferable to use different lengths to increase the heating effect.

The nonwoven fabric 180 may include carbon fiber, a binder, and carbon black, which are a heat generating paste composition, and preferably, 30 to 70 parts by weight of carbon fiber, 10 to 50 parts by weight of a binder, and 5 to 25 parts by weight of carbon black. It can be done by doing.

Here, the nonwoven fabric 180 may be formed by printing, drying and curing the heating paste composition on the rear surface of the back sheet 170. In this case, the nonwoven fabric 180 may have a circular or rectangular pattern to increase the heat dissipation effect, but is not limited thereto.

The carbon fiber may have a length of 5 μm to 100 μm, and it is preferable to use different lengths in order to increase the heating effect.

The heating sheet 160 and the non-woven fabric 180 can improve the efficiency of solar power generation by improving the solar efficiency decrease due to summer or overheating of the silicon solar cell by implementing a combined function of heat generation and heat dissipation.

The power sensing unit 210 generates a power sensing signal according to the periodically sensed values of the voltage and current collected from each solar panel 100, and the communication unit 260 is the power generated from the power sensing unit 210 The detection signal is transmitted to the server 270. In this case, the power detection unit 210 may further include a memory of the control unit 250 that stores the measurement time together with the sensed voltage and current values, and the stored data may be transmitted according to the request of the server 270.

The reverse bias supply unit 230 receives solar energy, converts it into electric energy, and supplies the charged electricity back to each solar cell side to heat the solar cell to melt snow.

When snow on the solar panel 100 is confirmed through the monitoring unit 210, the reverse bias supply unit 230 controls the reverse bias supply unit 230 to turn on the switch SW ( ON), the voltage of the battery 220 sends current to the solar cell through the resistance (R) and the switch (SW) of the reverse bias supply unit 230 to generate heat from the solar cell, thereby preventing snow accumulated on the solar panel 100. Can be melted and removed. As a result, it is possible to remove the accumulated snow more quickly and efficiently, and thus the loss of the function of the solar cell due to snow in winter can be prevented in advance.

The server 270 periodically receives the power detection signal from the power detection unit 210, determines whether there is an abnormality in the solar panel 100, and transmits it to the administrator mobile phone. That is, the server 270 transmits the photovoltaic panel 100 having a low power detection signal to the manager mobile phone compared with the power detection signal of the photovoltaic panel 100 in a normal state to the operating state of the individual photovoltaic panel 100. Can be managed in an optimal state.

Although the above has been described with reference to the preferred embodiments of the present invention, those skilled in the art will be able to variously modify and change the present invention within the scope not departing from the spirit and scope of the present invention described in the following claims. You will understand that you can.

Claims

A plurality of solar panels for generating power by collecting energy from sunlight;

A power sensing unit that generates a power sensing signal corresponding to the voltage and current produced by the solar panel;

A monitoring unit that checks whether there is snow on the solar panel through a CCTV monitor;

Reverse bias supply unit for melting snow accumulated by sending a current from the battery to the solar cell;

A control unit for controlling the power sensing unit, a monitoring unit, a battery, a reverse bias supply unit, and a communication unit;

A communication unit for wirelessly transmitting the power sensing signal; And

Including; a server for instructing the operation of snow melting to the control unit when it is snowed on the solar panel, and determining whether there is an abnormality in the corresponding solar panel through a power detection signal,

The solar panel is a photovoltaic power generation system, characterized in that the frame, glass, front EVA, solar cell, rear EVA, heating sheet, back sheet and non-woven fabric are stacked in this order.
The method of claim 1,

The reverse bias supply unit receives solar energy, converts it into electric energy, and supplies battery electricity charged in reverse to each solar cell to heat the solar cell to melt snow.
The method of claim 1,

The server is a photovoltaic power generation system, characterized in that for periodically receiving the power detection signal of the power detection unit to determine the presence or absence of an abnormality in the solar panel, and transmits it to the manager mobile phone.
The method of claim 1,

The heating sheet is a solar power generation system, characterized in that formed in a circular or rectangular pattern.
The method of claim 1,

The heating sheet is a solar power generation system comprising 10 to 20 parts by weight of graphite, 10 to 50 parts by weight of a binder, 5 to 25 parts by weight of carbon black, and 20 to 60 parts by weight of carbon nanotubes.
The method of claim 1,

The non-woven fabric is a solar power generation system comprising 30 to 70 parts by weight of carbon fiber, 10 to 50 parts by weight of a binder, and 5 to 25 parts by weight of carbon black.