KR20170013745A - Solar cell generating system - Google Patents

Abstract

The present invention provides an automatic power variation type solar power generation system according to an embodiment of the present invention includes a solar module switch unit for controlling serial connection and parallel connection between the first solar module and the Nth solar module; And a first voltage to an Nth voltage input from the first solar module to the Nth solar module, respectively, with a predetermined reference voltage, and the first voltage to the Nth voltage 2 corresponding to the Kth photovoltaic module to the K + 2 voltage corresponding to the Kth voltage, when the Kth voltage to the K + 2 voltage are read below the reference voltage, And a transmission control unit for controlling the series connection between the photovoltaic modules via the photovoltaic module switch unit.

Description

[0001] The present invention relates to a solar cell generating system,

The present invention relates to an automatic power fluctuation type solar power generation system, and more particularly, to a solar power generation system in which when a plurality of solar modules are connected to produce power, a solar module that produces power having a voltage lower than a reference voltage is read The present invention relates to an automatic power fluctuation type photovoltaic power generation system capable of always producing high-quality stable power by controlling the parallel connection with other normal solar modules.

In general, a solar inverter of a photovoltaic system is always equipped with a battery for charging solar power because charging is always ensured even in consideration of weather and disturbance shadows. Such a battery is a battery which can be used many times. A typical battery is charged by a charging system that applies power output to 12V and 24V for a predetermined time.

However, since the charging method of the conventional photovoltaic power generation system requires charging from the solar panel, when the battery is suddenly discharged, there is a problem that the charging can not be performed or the charging can not be performed rapidly. In some cases, Is damaged and can provide a considerable economic loss.

In addition, when the sunlight is weak for a short period of time, for example, at dawn or near sunset, the battery itself can not be charged at a time when charging can not be performed due to lack of light of the sunlight. The battery does not reach the required charging reference voltage and the battery can not actually function again.

To solve this problem, a photovoltaic power generation system using a serial and parallel hybrid power supply charging method is proposed by measuring a voltage of a power generated in a solar module and comparing the measured voltage with a predetermined reference voltage. . More specifically, the present invention proposes a photovoltaic power generation system using a series and parallel hybrid power charging scheme to charge batteries and transmit power to the power system using photovoltaic power generation.

However, a general feature of a conventional solar battery is that a commercial power supply or an auxiliary power supply is used together with the solar power generation power to charge the battery. Therefore, when the voltage generated through the solar panel accommodated in the solar module is small, it is not used for electric power generation, and since the commercial power is used as it is, the solar charging system using the solar power generation system And the problem is that the original intention is faded.

Accordingly, development of a photovoltaic power generation system capable of generating a higher-efficiency power is required.

1. Korean Registered Patent No. 10-1309536 (Nov. 2. Korean Patent Publication No. 10-2009-0128112 (December 15, 2009)

SUMMARY OF THE INVENTION The present invention has been conceived to solve the above-described problems, and it is an object of the present invention to provide a solar cell module, a solar cell module, Or to be connected in parallel with other normal photovoltaic modules, so that stable and stable power can be produced at all times.

According to an aspect of the present invention, there is provided an automatic power fluctuation type photovoltaic power generation system, comprising: a plurality of solar modules connected in series and parallel to each other, A solar module switch for controlling the solar module module; And a first voltage to an Nth voltage input from the first solar module to the Nth solar module, respectively, with a predetermined reference voltage, and the first voltage to the Nth voltage 2 corresponding to the Kth photovoltaic module to the K + 2 voltage corresponding to the Kth voltage, when the Kth voltage to the K + 2 voltage are read below the reference voltage, And a transmission control unit for controlling the series connection between the photovoltaic modules via the photovoltaic module switch unit.

Further, in the power transmission control unit of the automatic power fluctuation type solar power generation system according to an embodiment of the present invention, among the Kth voltage to the K + 2 voltage, the K + 1 voltage is higher than the reference voltage by a predetermined range And controls the connection between the (K + 1) th solar module corresponding to the (K + 1) th voltage and the transmission control unit to be cut off.

In addition, in the automatic power variation type solar power generation system according to an embodiment of the present invention, the solar module switching unit is provided corresponding to each of the first solar module and the Nth solar module, A first serial switch to an Nth serial switch for controlling a serial connection between the modules; A first parallel switch to an Nth parallel switch provided corresponding to the first solar module to the Nth solar module, respectively, for controlling parallel connection between the solar modules; And the first to Nth parallel modules are provided in correspondence with the first to Nth solar modules, respectively, and are connected to the first to nth series switches, respectively, And a first module switch to an Nth module switch for controlling connection and disconnection between the respective solar modules and the power transmission control unit.

Further, the power transmission control unit of the automatic power variation type solar power generation system according to an embodiment of the present invention may be configured such that the first voltage to the second voltage, which are generated from the first solar module to the Nth solar module, A voltage comparator comparing the reference voltage with the reference voltage; A switch controller for controlling a series connection or a parallel connection between the solar modules via the solar module switch according to the comparison result of the voltage comparator; And a power transmission unit for transmitting power received from each of the solar modules to a battery or a power system.

The switch control unit of the automatic power variation type solar power generation system according to an embodiment of the present invention compares the voltage generated in each of the solar modules with the reference voltage and generates a voltage lower than the reference voltage The solar cell module is characterized in that a series connection or a connection cut-off is planned in accordance with an algorithm selected for a solar module.

According to the power automatic variation type photovoltaic power generation system of the present invention, solar light is absorbed through a solar module, so that even if the output voltage generated and output from the solar module changes according to the incident amount of sunlight, It is possible to obtain a voltage that can be continuously supplied to the battery charging and power system by dividing / integrating / interrupting in series and in parallel through the switch control unit.

FIG. 1 is a block diagram illustrating power generation by switching in parallel in an automatic power variation type solar power generation system according to an embodiment of the present invention. Referring to FIG.
FIG. 2 is a block diagram illustrating power generation by switching in series and in parallel in a power automatic variation type solar power generation system according to an embodiment of the present invention. Referring to FIG.
FIG. 3 is a block diagram showing the power generation by the serial connection and the connection being cut off in the power automatic variation type solar power generation system according to the embodiment of the present invention.
4 is an operational flowchart of an automatic power fluctuation type solar power generation system according to an embodiment of the present invention.
5 is a photovoltaic module voltage table showing voltages generated in each solar module of the automatic power variation type solar power generation system according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram illustrating power generation by switching in parallel in an automatic power variation type solar power generation system according to an embodiment of the present invention. Referring to FIG.

The power automatic variation type solar power generation system 100 is divided into a charging method of the battery 420 and a power system 430 transmission method. The battery 420 charging method is used in areas such as mountains, oceans and islands where electric power is not connected to the electric power generated from an external power plant, which is difficult to supply electric power. Particularly, in the charging method of the storage battery 420, the voltage value of the power generated in the automatic power variation type solar power generation system 100 is compared with the predetermined reference voltage value of the storage battery 420 and adjusted so that the storage battery 420 is stably charged . Generally, the reference voltage value of the battery 420 is set to 12V and 24V.

Power System (430) The transmission system is installed in a home where power lines are in the external power plant. Generally, the power system 430 transmission method is such that the predetermined reference voltage value of the power developed in the automatic power variation type solar power generation system 100 is to be output to 150V, and is output constantly to the predetermined reference voltage value Can be reliably used for external power transmission and domestic use. The power automatic variation type solar power generation system 100 of the present invention will exemplify a predetermined reference voltage value of the charging method of the storage battery 420.

The automatic power variation type solar power generation system 100 of the present invention is not irradiated under the same condition when the amount of solar radiation is insufficient, that is, the solar radiation amount is from morning to evening. Usually 365 days a year, a clear day without a cloud is not even 30%. Generally, when the voltage value generated from a single photovoltaic module is less than the predetermined reference voltage value when the photovoltaic module is connected in series, there is a problem that the power generation amount is reduced due to the influence on the entire photovoltaic module .

1, an automatic power variation type solar power generation system 100 according to the present invention includes one or more photovoltaic cells (photovoltaic cells) FIG. 1 is a block diagram showing a power automatic variation type solar power generation system in which a module is configured as a parallel connection. The parallel connection may be applied when a constant voltage is generated in each of the one or more solar modules when the gaseous state is good.

In this case, since the DC power generated by the at least one solar module is a constant voltage and current, the flow of the output of the DC power source is unidirectionally induced, and a predetermined reference voltage, for example, One or more voltage measurers, a switch controller 400 and a voltage comparator 390, which constantly adjust the voltage range of 13.6V to 14V, may be configured. The at least one voltage meter may include a first voltage meter 340, a second voltage meter 350, and a third voltage meter 360 to an N th voltage meter 370.

More specifically, the first voltage meter 340, the second voltage meter 350, the third voltage meter 360, and the N th voltage meter 370 are used to measure the flow of electric power generated from the at least one solar module So that backflow can be prevented. For reference, the backflow prevention can be controlled by applying a backflow prevention device. The voltage comparator 390 compares the power generated in the at least one solar module with a predetermined reference voltage value, and the voltage of the generated power can be rectified and adjusted through the switch controller 400.

The automatic power variation type solar power generation system 100 according to the present invention may include one or more solar modules, a solar module switch unit, and a transmission control unit 380. The at least one solar module may be implemented by a first solar module 110, a second solar module 120, a third solar module 130, and an Nth solar module 140. The power generated from the at least one solar module can be transmitted to the outside through the transmission control unit 380. [

At this time, the at least one solar module and the at least one solar module switch can be connected and disconnected, respectively. The at least one solar module switch controls the serial connection and the parallel connection between the first solar module 110, the second solar module 120, the third solar module 130 to the Nth solar module 140, can do.

The transmission control unit 380 compares the first voltage to the Nth voltage respectively input from the first solar module 110 to the Nth solar module 140 with the predetermined reference voltage, The voltage corresponding to the Kth photovoltaic module to the (K + 2) -th voltage corresponding to the Kth voltage, when the Kth voltage to the K + The serial connection between the K + 2 solar modules can be controlled through the solar module switch part.

The first voltage to the N-th voltage and the K-th voltage to the K + 2 voltage are applied to the at least one solar module, that is, the first solar module 110, the second solar module 120, The first voltage meter 340, the second voltage meter 350, the third voltage meter 360, and the N th voltage meter, which are provided corresponding to the module 130 to the Nth solar module 140, respectively, .

The transmission control unit 380 may include a voltage comparison unit 390, a switch control unit 400, and a power transmission unit 410. The voltage comparator 390 compares the electric power generated from the first solar module 110, the second solar module 120, the third solar module 130 and the Nth solar module 140, 1 voltage, the second voltage, the third voltage, and the Nth voltage may be output and compared with a reference voltage.

The switch control unit 400 may control the voltage of the first solar module 110, the second solar module 120, the third solar module 130, Module 140 can be controlled through the solar module switch unit. The photovoltaic module switch part may be composed of one or more serial switches, one or more parallel switches, and one or more module switches.

The at least one module switch may be a hall effect sensor. In the Hall effect sensor, a device whose voltage varies according to the intensity of the magnetic field is used, the magnetic field and the magnetic field are measured using the magnetic sensitivity characteristic, and a physical phenomenon is generated in which an electromotive force is generated in proportion to the magnetic field and the magnetic field. As described above, in the Hall effect sensor, a magnetic field is formed perpendicular to a direction of a current in a state where a current flows through the conductor, and a potential difference is generated in the conductor in a direction perpendicular to the current in which the current flows, have. This voltage is referred to as a Hall voltage.

The at least one serial switch may comprise a first serial switch 150, a second serial switch 160, a third serial switch 170, and an Nth serial switch 180. The first serial switch 150, the second serial switch 160, the third serial switch 170 and the Nth serial switch 180 are connected to the first solar module 110, the second solar module 120, The second solar module 120, the third solar module 130, and the third solar module 130. The first solar module 110, the second solar module 120, and the third solar module 130 are installed corresponding to the third solar module 130 to the Nth solar module 140, To the Nth solar module 140 are controlled through the switch control unit 400 and can be connected in series.

The one or more parallel switches may include a first parallel switch 190, a second parallel switch 200, and a third parallel switch 210 to an Nth parallel switch 220. The first parallel switch 190, the second parallel switch 200, the third parallel switch 210 to the Nth parallel switch 220 are connected to the first solar module 110, the second solar module 120, The connections between the third solar module 130 to the N solar modules 140 are controlled through the switch controller 400 and can be connected in parallel.

The one or more module switches include a first module switch 230, a second module switch 240, a third module switch 250, a fourth module switch 260, a fifth module switch 270, The seventh module switch 280, the seventh module switch 290, the eighth module switch 300, the ninth module switch 310, and the tenth module switch 320 to the Nth module switch 330.

The first module switch 230, the second module switch 240, the third module switch 250, the fourth module switch 260, the fifth module switch 270, the sixth module switch 280, The module switch 290, the eighth module switch 300, the ninth module switch 310, the tenth module switch 320 to the N th module switch 330 are connected to the first solar module 110, The optical module 120, the third solar module 130 to the Nth solar module 140, respectively, are connected to the at least one serial switch, respectively, and are also connected to the at least one parallel switch The connection and disconnection between the first solar module 110, the second solar module 120, the third solar module 130 to the Nth solar module 140, and the transmission control unit 380 can be controlled have.

The switch control unit 400 controls the voltages generated by the first solar module 110, the second solar module 120 and the third solar module 130 to the N solar modules 140, respectively, And a series connection or a connection cut-off can be planned in accordance with a predetermined algorithm for a solar module that generates a voltage lower than the reference voltage value.

The power transmitting unit 410 receives electric power received from the first solar module 110, the second solar module 120, the third solar module 130 to the Nth solar module 140, And the power system 430, respectively.

FIG. 2 is a block diagram illustrating power generation by switching in series and in parallel in a power automatic variation type solar power generation system according to an embodiment of the present invention. Referring to FIG.

FIG. 2 illustrates power generation by switching in series and in parallel in an automatic power variation type solar power generation system with reference to FIG. Fig. 2 shows that sunlight can be generated in some areas by clouds, often at the expense of a very good clear day. The shade may be generated by clouds, snow, dust, sexual abuse, and other foreign matter. That is, as shown in FIG. 2, a first shaded area 440 may be formed on the surfaces of the first solar module 110, the second solar module 120, and the third solar module 130.

The first shaded area 440 may be repeated and generated from time to time. At this time, the second module switch 240 and the third module switch 250 are turned off and the first solar module 110, the second solar module 120, and the third solar module 130 are turned off, And may be connected in parallel with the Nth solar module 140 to generate electricity. The first shaded region 440 can drastically reduce the total amount of electric power generated in the power automatic variation type solar power generation system 100.

At this time, the first solar module 110, the second solar module 120, and the third solar module 130 may be connected in series. The switch controller 400 controls the voltages generated by the first solar module 110, the second solar module 120, the third solar module 130, and the Nth solar module 140, A serial connection or a connection cutoff can be planned in accordance with a predetermined algorithm for a solar module which compares the reference voltage value with a voltage lower than the reference voltage value.

In general, the battery 420 can be set to a predetermined reference voltage of 12V. The voltage comparator 390 compares the voltage value generated by the first solar module 110, the second solar module 120, the third solar module 130, Can be compared. The magnitude of the voltage value generated in each of the first solar module 110, the second solar module 120, the third solar module 130, and the Nth solar module 140 is stored in the storage battery 420 And may be connected in parallel through the solar module switch unit if the reference voltage is higher than the set reference voltage and may be connected in series through the solar module switch unit if less than the reference voltage. The photovoltaic module switch unit may include at least one serial switch, at least one parallel switch, and at least one module switch, and may be controlled through the switch control unit 400.

The at least one serial switch may comprise a first serial switch 150, a second serial switch 160, a third serial switch 170, and an Nth serial switch 180. The one or more parallel switches may include a first parallel switch 190, a second parallel switch 200, and a third parallel switch 210 to an Nth parallel switch 220. The one or more module switches include a first module switch 230, a second module switch 240, a third module switch 250, a fourth module switch 260, a fifth module switch 270, The seventh module switch 280, the seventh module switch 290, the eighth module switch 300, the ninth module switch 310, and the tenth module switch 320 to the Nth module switch 330.

FIG. 3 is a block diagram showing the power generation by the serial connection and the connection being cut off in the power automatic variation type solar power generation system according to the embodiment of the present invention.

FIG. 3 is a diagram illustrating power generation by interrupting the series connection and the connection in the automatic power fluctuation type solar power generation system, with reference to FIGS. 1 and 2. FIG. 3 shows that sunlight can be generated in some areas by clouding at any time, eliminating a very good clear day. The shade may be generated by clouds, snow, dust, sexual abuse, and other foreign matter. That is, as shown in FIG. 3, on the surface of the first solar module 110, the second solar module 120, the third solar module 130 to the Nth solar module 140, The first shade region 450 and the third shade region 460 may be generated. The second shaded area 450 and the third shaded area 460 may be repeatedly generated at any time. The second shaded area 450 and the third shaded area 460 can be drastically reduced in the total power generation amount generated in the solar power generation system 100. [

At this time, the third module switch 270 of the first solar module 110 is turned off, and the connection can be shut off. The second solar module 120, the third solar module 130, and the Nth solar module 140 may be connected in series.

4 is an operational flowchart of an automatic power fluctuation type solar power generation system according to an embodiment of the present invention.

4 may comprise a power generation step 510, a voltage measurement step 520, a transmission control step 530, and a charging / transmission step 540. The power generation step 510, Power generation step 510 may be powered by one or more solar modules. The voltage measuring step 520 measures the voltage of each of the generated power in the at least one solar module, compares the selected reference voltage with the voltage of the generated power, and determines whether the connection mode of the at least one solar module is a serial connection, Parallel connection and disconnection can be controlled. The control can be controlled through the switch control unit 400 by the solar module switch unit.

The transmission control step 530 determines the magnitude of the voltage measured in the voltage measurement step 520. When the magnitude of the voltage developed in one or more solar modules is equal to or greater than 12 V, And the at least one solar module may be connected in parallel. The solar module having the voltage output of the predetermined voltage value of less than 12V may be connected in series and may be connected in parallel with another solar module. In addition, the power transmission control step 530 may prevent the voltage applied to the battery 420 from being overcharged when the power transmitted through the power transmission unit 410 is switched to the charging / transmission step 540, The voltage can be adjusted and applied.

As described above, the charging / transmitting step 540 may transmit the generated power from one or more solar modules and may be charged to the battery 420 and transmitted to the power system 430.

5 is a photovoltaic module voltage table showing voltages generated in each solar module of the automatic power variation type solar power generation system according to an embodiment of the present invention.

2 is a solar cell module voltage table 600 showing the voltage generated in each solar module of the automatic power fluctuation type solar power generation system 100 as follows based on the above description in FIGS. 1, 2 and 3. Generally, the battery 420 has a reference voltage in the range of 12 V, and the voltage generated in each solar module according to the solar radiation amount is described in FIG. 5 as an example.

In the voltage table 600, CASE 1 indicates voltage values of the first solar module 110, the second solar module 120, the third solar module 130, and the Nth solar module 140, When the voltages are uniformly generated at 12V, the parallel connection can be controlled as shown in FIG. The parallel connection may generate a constant voltage in the first solar module 110, the second solar module 120, the third solar module 130 and the Nth solar module 140 when the weather condition is good . ≪ / RTI >

In this case, since the DC power generated by the at least one solar module is a constant voltage and current, the flow of the output of the DC power source is unidirectionally induced, and a predetermined reference voltage, for example, One or more voltage measurers, a switch controller 400 and a voltage comparator 390, which constantly adjust the voltage range of 13.6V to 14V, may be configured.

In the voltage table 600, CASE 2 indicates voltage values of the first solar module 110, the second solar module 120, the third solar module 130, and the Nth solar module 140, If the voltage values are 1 V, 5 V, 7 V, and 12 V, respectively, the first solar module 110, the second solar module 120, and the third solar module 130 are less than 12 V, ), The second solar module 120, and the third solar module 130 are connected in series, they can be synthesized to a total of 13V. Since the voltage value of 13V is more than 12V that can be charged, the battery 420 can be stably charged and transmitted.

A situation such as CASE 2 may occur when the first shaded region 440 is repeated and is generated from time to time, as shown in FIG. At this time, the second module switch 240 and the third module switch 250 are turned off and the first solar module 110, the second solar module 120, and the third solar module 130 are turned off, And may be connected in parallel with the Nth solar module 140 to generate electricity. The first shaded region 440 can drastically reduce the total amount of electric power generated in the power automatic variation type solar power generation system 100.

In the voltage table 600, CASE 3 represents voltage values of the first solar module 110, the second solar module 120, the third solar module 130, and the Nth solar module 140, If the voltage values are 1V, 2V, 7V, and 3V, respectively, the first solar module 110 is turned off to cut off the connection, and the second solar module 120, the third solar module 130, N photovoltaic modules 140 may be connected in series and synthesized at 12V and developed. Since the voltage value of 12V is more than 12V which can be charged, the battery 420 can be stably charged and transmitted.

CASE 3 is formed on the surfaces of the first solar module 110, the second solar module 120, the third solar module 130 and the Nth solar module 140 as shown in FIG. 3, Region 450 and third shaded region 460 may be generated. The second shaded area 450 and the third shaded area 460 may be repeatedly generated at any time. The second shaded region 450 and the third shaded region 460 can be drastically reduced in the total amount of electric power generated in the power automatic variation type solar power generation system 100.

At this time, the third module switch 270 of the first solar module 110 is turned off, and the connection can be shut off. The second solar module 120, the third solar module 130, and the Nth solar module 140 may be connected in series.

The power automatic variation type solar power generation system 100 of the present invention as described above can be applied to a power generation system using conventional solar light. More particularly, the present invention relates to a solar cell module that can actively determine and control the impossibility of charging from sunlight that is variably irradiated according to the gas phase state, and controls the one or more solar modules by serial connection, parallel connection, As shown in FIG.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the equivalents of the claims, as well as the claims.

100: solar power generation system 110: first solar module
120: second solar module 130: third solar module
140: Nth solar module 150: first serial switch
160: second serial switch 170: third serial switch
180: Nth serial switch 190: First parallel switch
200: second serial switch 210: third parallel switch
220: Nth parallel switch 230: first module switch
240: second module switch 250: third module switch
260: fourth module switch 270: fifth module switch
280: sixth module switch 290: seventh module switch
300: eighth module switch 310: ninth module switch
320: tenth module switch 330: N th module switch
340: first voltage meter 350: second voltage meter
360: Third voltage meter 370: Nth voltage meter
380: transmission control unit 390: voltage comparison unit
400: switch control unit 410: power transmission unit
420: Battery 430: Power system
440: first shaded area 450: second shaded area
460: Third shade area 500: Operation flow chart
510: power generation step 520: voltage measurement step
530: transmission control step 540: charge / transmission step
600: PV module voltage table

Claims (4)

A photovoltaic power generation system for externally transmitting power generated from a first solar module to an Nth solar module,
A solar module switch unit for controlling serial connection and parallel connection between the first solar module and the Nth solar module; The first voltage to the Nth voltage input from the first solar module to the Nth solar module are respectively compared with a predetermined reference voltage, , And (K + 2) solar modules corresponding to the Kth solar module to the K + 2 voltage corresponding to the Kth voltage when the Kth voltage to the K + 2 voltage are read below the reference voltage And a transmission control unit for controlling the series connection through the solar module switch unit,
The solar module switch unit includes:
A first serial switch to an Nth serial switch installed corresponding to the first solar module to the Nth solar module, respectively, for controlling a series connection between the solar modules;
A first parallel switch to an Nth parallel switch installed corresponding to the first solar module to the Nth solar module, respectively, for controlling parallel connection between the solar modules;
And the first to Nth parallel modules are respectively connected to the first to Nth solar modules and to the first to nth series switches, And a first module switch to an Nth module switch connected to each of the plurality of solar modules to control connection and disconnection between the respective solar modules and the power transmission control unit.
The method according to claim 1,
1) voltage corresponding to the (K + 1) -th voltage when the K + 1 voltage is lower than the reference voltage by a predetermined range or more among the K-th voltage to the K + And controlling the connection between the power control unit and the power control unit to be cut off.
The method according to claim 1,
Wherein the transmission control unit includes:
A voltage comparator comparing the first voltage to the second voltage generated from the first solar module to the N th solar module with the reference voltage;
A switch control unit for controlling a series connection or a parallel connection between the respective solar modules via the solar module switch unit according to the comparison result of the voltage comparison unit;
And a power transmission unit for transmitting power received from each of the solar modules to a battery or a power system.
5. The method of claim 4,
The switch controller compares a voltage generated by each of the solar modules with the reference voltage and performs a series connection or a connection cutoff according to a predetermined algorithm for a solar module that generates a voltage lower than the reference voltage Wherein said solar power generation system comprises:

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