KR101889773B1 - Photovoltaic module and photovoltaic system including the same - Google Patents
Photovoltaic module and photovoltaic system including the same Download PDFInfo
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- KR101889773B1 KR101889773B1 KR1020160108605A KR20160108605A KR101889773B1 KR 101889773 B1 KR101889773 B1 KR 101889773B1 KR 1020160108605 A KR1020160108605 A KR 1020160108605A KR 20160108605 A KR20160108605 A KR 20160108605A KR 101889773 B1 KR101889773 B1 KR 101889773B1
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- 239000010703 silicon Substances 0.000 description 4
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/06—Arrangements for measuring electric power or power factor by measuring current and voltage
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
- G08C19/02—Electric signal transmission systems in which the signal transmitted is magnitude of current or voltage
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/40—Thermal components
- H02S40/42—Cooling means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
The present invention relates to a photovoltaic module and a photovoltaic system having the same. A solar photovoltaic system according to an embodiment of the present invention includes a plurality of solar modules for outputting a DC power source and an inverter portion for converting a DC power source from a plurality of solar modules into an AC power source, And a control unit for controlling the output power of the inverter unit to be lower and outputting the second output power corresponding to the power consumption of the load when the output power of the inverter unit is larger than the power consumption of the load do. Thereby, even when the AC power source is unstable based on the solar module, the grid can be stably maintained.
Description
BACKGROUND OF THE
With the recent depletion of existing energy sources such as oil and coal, interest in alternative energy to replace them is increasing. Among them, solar cells are attracting attention as a next-generation battery that converts solar energy directly into electrical energy using semiconductor devices.
Meanwhile, the photovoltaic module means that the solar cells for solar power generation are connected in series or in parallel.
On the other hand, in the case of outputting AC power to a grid based on a solar module, there is a high possibility that the grid becomes unstable, such as an increase in the distortion rate (THD) while various powers are mixed. Accordingly, various schemes for stably maintaining the grid are being discussed.
An object of the present invention is to provide a solar module capable of making the power supplied to the grid zero, and a solar light system having the solar module.
Particularly, it is an object of the present invention to provide a solar module capable of stably maintaining a grid based on a solar module so that the power supplied to the grid becomes zero even when the AC power source is unstable, System.
According to an aspect of the present invention, there is provided a solar photovoltaic system including a plurality of solar modules for outputting DC power, and an inverter for converting a DC power from a plurality of solar modules into an AC power, The inverter unit includes a communication unit for receiving power consumption information of the load from the outside, and a control unit for outputting a second output power corresponding to the power consumption of the load, when the output power of the inverter unit is larger than the power consumption of the load, And a control unit for controlling the control unit.
According to another aspect of the present invention, there is provided a solar photovoltaic system including a plurality of photovoltaic modules for outputting AC power, each of the photovoltaic modules receiving power consumption information of a load from the outside And a control unit for controlling the output power of the solar module to be lower and outputting the second output power corresponding to the power consumption of the load when the output power of the solar module is larger than the power consumption of the load.
According to another aspect of the present invention, there is provided a solar module including a solar cell module having a plurality of solar cells, a converter unit converting the level of the DC power from the solar cell module, An inverter unit for outputting the AC power converted based on the level-converted DC power source in the inverter unit, a cable for outputting the AC power from the inverter unit to the outside, a communication unit for receiving power consumption information of the load from the outside, And a control unit for controlling the output power of the inverter unit to be lowered to output the second output power corresponding to the power consumption of the load when the power is larger than the power consumption of the load.
A solar photovoltaic system according to an embodiment of the present invention includes a plurality of solar modules for outputting a DC power source and an inverter portion for converting a DC power source from a plurality of solar modules into an AC power source, A control section for controlling the output power of the inverter section to be lowered and outputting the second output power corresponding to the power consumption of the load when the output power of the inverter section is higher than the power consumption of the load So that the power supplied to the grid can be made zero.
Particularly, even when the AC power source is unstable based on the solar module, the power supplied to the grid becomes zero, and the grid can be stably maintained.
Specifically, when the peak value of the output current of the inverter section is out of the permissible range and the power consumption of the load is equal to or greater than the output power of the inverter section, the AC power outputted from the inverter section is supplied to the load, So that it can be stably maintained.
On the other hand, when the peak value of the output current of the inverter section is within the permissible range and the power consumption of the load is smaller than the output power of the inverter section, the alternating current power output from the inverter section is supplied to the grid and the load to stably maintain the grid And the power can be supplied stably to the load.
According to another aspect of the present invention, there is provided a solar photovoltaic system including a plurality of photovoltaic modules for outputting AC power, each photovoltaic module including a communication unit for receiving power consumption information of the load from the outside, When the output power of the optical module is greater than the power consumption of the load, the control unit controls the output power of the solar module to be lowered to output the second output power corresponding to the power consumption of the load, To be zero.
Particularly, even when the AC power source is unstable based on the solar module, the power supplied to the grid becomes zero, and the grid can be stably maintained.
Specifically, when the peak value of the output current of the solar module is out of the allowable range and the power consumption of the load is equal to or greater than the output power of the solar module, the AC power output from the solar module is supplied to the load, The grid can be stably maintained.
On the other hand, when the peak value of the output current of the solar module is within the permissible range and the power consumption of the load is smaller than the output power of the solar module, by supplying the AC power outputted from the solar module to the grid and the load, The grid can be stably maintained and the power can be stably supplied to the load.
1 is a view showing a conventional solar optical system.
2A is a diagram illustrating a solar light system according to an embodiment of the present invention.
Figures 2B-2D illustrate a photovoltaic system in accordance with various embodiments of the present invention.
Fig. 3 is a view showing the back surface of the solar module of the solar photovoltaic system of Fig. 2a.
4 is a diagram showing an example of a circuit diagram of the inverter unit of FIG.
5 is a flowchart illustrating an operation method of a solar photovoltaic system according to an embodiment of the present invention.
6A to 6D are views referred to in the description of the operation method of FIG.
7 is a view illustrating a solar light system according to another embodiment of the present invention.
8A to 8C are views referred to the description of the solar photovoltaic system of Fig.
Fig. 9 is a diagram showing an example of a circuit diagram inside the junction box in the solar module of Fig. 7;
10 is a front view of the solar module of Fig. 7;
Fig. 11 is a rear view of the solar module of Fig. 10; Fig.
12 is an exploded perspective view of the solar cell module of FIG.
Hereinafter, the present invention will be described in detail with reference to the drawings.
The suffix "module" and " part "for components used in the following description are given merely for convenience of description, and do not give special significance or role in themselves. Thus, "module" and "part" may be used interchangeably.
1 is a view showing a conventional solar optical system.
1 includes a
The power from the
On the other hand, when the power from the
On the other hand, when the AC power is output to the grid based on the solar module, the possibility that the grid becomes unstable increases due to various power mixing and an increase in total harmonic distortion (THD).
Therefore, in the present invention, a method of stably maintaining the grid even when the AC power source is unstable based on the solar module is described. This will be described with reference to FIG.
2A is a diagram illustrating a solar light system according to an embodiment of the present invention.
Referring to the drawings, a solar
The
The
Alternatively, the
The power
On the other hand, the AC current Ila input to the
Each of the plurality of
The
On the other hand, the
For example, the
On the other hand, the
For example, the
On the other hand, the
On the other hand, the
This allows the
For example, the
As another example, the
The
The
On the other hand, the
4, when the output power of the
Particularly, even when the alternating-current power source is unstable based on the solar module, the power supplied to the
On the other hand, when the output power of the
On the other hand, when the peak value of the output current of the
On the other hand, when the peak value of the output current of the
That is, the
Thus, unstable AC current is not supplied to the
On the other hand, when the power follow-up control is performed in this manner, the power supplied to the
On the other hand, when the peak value of the output current Iac of the
To this end, the
When the peak value of the output current Iac of the
When the peak value of the output current Iac of the
That is, when the output current Iac of the
To this end, the
When the peak value of the output current Iac of the
Figures 2B-2D illustrate a photovoltaic system in accordance with various embodiments of the present invention.
First, the solar
The
Alternatively, the
Alternatively, the
The solar system 10c of Figure 2c is similar to the
Wireless communication, WiFi, ZigBee, UWB, etc., can be performed in the communication method.
The
Fig. 3 is a view showing the back surface of the solar module of the solar photovoltaic system of Fig. 2a.
Referring to the drawings, a solar
Each of the
In particular, the junction boxes 202a1 to 202an may be disposed on the back surfaces of the respective
On the other hand, the DC power source Vdcx inputted to the
In this case, as described above, the
4 is a diagram showing an example of a circuit diagram of the inverter unit of FIG.
Referring to the drawings, the
Specifically, the
Accordingly, the junction boxes 202a1 to 202an of the respective
The
In addition, the
The
On the other hand, the
On the other hand, the
On the other hand, the
On the other hand, a DC power source which has passed through bypass diodes (not shown) in the junction boxes 202a1 to 202an of the respective
The
In the figure, the
The
In particular, the
For example, the
In the figure, an example of the
The
On the other hand, a dc short capacitor (not shown) may be connected between the output terminal of the diode D1, that is, between the cathode and the ground terminal.
Specifically, the switching element S1 can be connected between the taps of the tap inductor T and the ground terminal. The output terminal (secondary side) of the tap inductor T is connected to the anode of the diode D1 and the dc-side capacitor C1 is connected between the cathode of the diode D1 and the ground terminal .
On the other hand, the primary side and the secondary side of the tap inductor T have opposite polarities. On the other hand, the tap inductor T may be referred to as a switching transformer.
On the other hand, the switching element S1 in the
The inverter 540a can convert the DC power converted by the
In the drawing, a full-bridge inverter is illustrated. Namely, the upper and lower arm switching elements Sa and Sb connected in series to each other and the lower arm switching elements S'a and S'b are paired, and two pairs of upper and lower arm switching elements are connected in parallel to each other (Sa & Sb & S'b). Diodes may be connected in anti-parallel to each switching element Sa, S'a, Sb, S'b.
The switching elements Sa, S'a, Sb and S'b in the inverter 540a can be turned on / off based on the inverter switching control signal from the
On the other hand, the capacitor C may be disposed between the
The capacitor C may store the level-converted DC power of the
Meanwhile, the input current sensing unit A may sense an input current ic1 supplied from the
The input voltage sensing unit B may sense the input voltage Vc1 supplied from the
The sensed input current ic1 and the input voltage vc1 may be input to the
The converter output current detector C senses the output current ic2 output from the
The inverter output current detector E detects the current ic3 output from the inverter 540a and the inverter output voltage detector F detects the voltage vc3 output from the inverter 540a. The detected current ic3 and the voltage vc3 are input to the
On the other hand, the
On the other hand, the
On the other hand, the
On the other hand, the
On the other hand, the
Here, the power information of the
On the other hand, when the peak value of the output current of the
For example, when the peak value of the output current of the
On the other hand, when the peak value of the output current of the
On the other hand, when the peak value of the output current of the
For example, when the peak value of the output current of the
The
For example, the
On the other hand, the
FIG. 6 is a flowchart illustrating an operation method of a solar module according to an embodiment of the present invention, and FIGS. 6A to 6D are views referred to in the description of the operation method of FIG.
Hereinafter, the
Referring to the drawing, the output current detection unit E or the like of the
Next, the
The
For example, the
As another example, the
Next, the
On the other hand, when the output current peak value of the
On the other hand, when the output current peak value of the
6A illustrates an example of the output current waveform Iac1 of the
First, FIG. 6A shows that the output current waveform Iac1 of the
6A, when the output current waveform Iac1 of the
6 (b), the current path Path1a to the
6B illustrates an example of the output current waveform Iac2 of the
6 (a) shows a case where the output current waveform Iac2 of the
As described above, when the output current waveform Iac1 of the
On the other hand, when the power consumption of the
In Fig. 6B, the current path (Path2) to the
6C is a diagram referred to explain the power follow-up control.
6C illustrates the voltage and power curves for a solar module.
Normally, for maximum power output, the output voltage of the solar module is varied and the maximum power of Pa is output at the voltage Vdca, so that the output voltage of the solar module is maintained at Vdca.
On the other hand, when the power consumption of the
To this end, it is desirable to move the Vdc voltage in Fig. 6C to Vdcb and lower the output power from Pa to Pb. As a result, the
FIG. 6D illustrates an example of the output current waveform Iac3 of the
6 (a) shows a case where the output current waveform Iac3 of the
In this way, when the output current waveform Iac1 of the
On the other hand, when the power consumption of the
6B, the current path Path3a from the
7 is a view illustrating a solar light system according to another embodiment of the present invention.
Referring to the drawings, a
The plurality of
On the other hand, the plurality of
On the other hand, the
The plurality of
Alternatively, the
The power
On the other hand, the AC current Ila input to the
Each of the plurality of
The plurality of
On the other hand, the plurality of
For example, the plurality of
On the other hand, the
For example, the
On the other hand, the
On the other hand, the
This allows the
For example, the
As another example, the
The
The
On the other hand, the plurality of
9, each of the plurality of
On the other hand, when the output power of each of the plurality of
On the other hand, the
That is, the peak value of the output current Iac is out of the permissible range, the output current Iac is unstable, and the power consumption of the
Thus, unstable AC current is not supplied to the
On the other hand, when the power follow-up control is performed in this manner, the power supplied to the
Next, in the plurality of
To this end, the plurality of
The peak value of the output current Iac of the plurality of
Next, the plurality of
More specifically, the
That is, when the output current Iac of the plurality of
To this end, the plurality of
Accordingly, the
8A to 8C are views referred to the description of the solar photovoltaic system of Fig.
8A shows a case where the peak value of the output current Iac of the plurality of
The output current Iac of the plurality of
In Fig. 8A, the current path (Pathaa) to the
Next, FIG. 8B shows a case where the peak value of the output current Iac of the plurality of
On the other hand, the plurality of
The output current Iac of the plurality of
In Fig. 8b, the current path Pathba to the
Next, FIG. 8C shows a case where the peak value of the output current Iac of the plurality of
On the other hand, when the power consumption of the
8C shows the current path Pathca from the plurality of
Fig. 9 is a diagram showing an example of a circuit diagram inside the junction box in the solar module of Fig. 7;
Referring to the drawings, the
Particularly, in connection with the present invention, the
The
The
The
On the other hand, the
On the other hand, the
On the other hand, the
The
The bypass diodes Dc, Db and Da are connected to the first to fourth
On the other hand, the DC power source through the
The
In the figure, the
The
In particular, the
For example, the
In the drawing, a tapped inductor converter is illustrated as an example of the
The
On the other hand, a dc short capacitor (not shown) may be connected between the output terminal of the diode D1, that is, between the cathode and the ground terminal.
Specifically, the switching element S1 can be connected between the taps of the tap inductor T and the ground terminal. The output terminal (secondary side) of the tap inductor T is connected to the anode of the diode D1 and the dc-side capacitor C1 is connected between the cathode of the diode D1 and the ground terminal .
On the other hand, the primary side and the secondary side of the tap inductor T have opposite polarities. On the other hand, the tap inductor T may be referred to as a switching transformer.
On the other hand, the switching element S1 in the
The
In the drawing, a full-bridge inverter is illustrated. Namely, the upper and lower arm switching elements Sa and Sb connected in series to each other and the lower arm switching elements S'a and S'b are paired, and two pairs of upper and lower arm switching elements are connected in parallel to each other (Sa & Sb & S'b). Diodes may be connected in anti-parallel to each switching element Sa, S'a, Sb, S'b.
The switching elements Sa, S'a, Sb, and S'b in the
On the other hand, the capacitor C may be disposed between the
The capacitor C may store the level-converted DC power of the
The input current sensing unit A may sense the input current ic1 supplied from the
The input voltage sensing unit B may sense the input voltage Vc1 supplied from the
The sensed input current ic1 and the input voltage vc1 may be input to the
The converter output current detector C senses the output current ic2 output from the
On the other hand, the inverter output current detection unit E detects the current ic3 output from the
On the other hand, the
On the other hand, the
On the other hand, the
On the other hand, the
On the other hand, the
Here, the power information of the
On the other hand, when the peak value of the output current of the plurality of
For example, when the peak value of the output current of the plurality of
On the other hand, when the peak value of the output current of the plurality of
On the other hand, when the peak value of the output current of the plurality of
For example, when the peak value of the output current of the plurality of
The
For example, the
On the other hand, the
FIG. 10 is a front view of the solar module of FIG. 7, and FIG. 11 is a rear view of the solar module of FIG.
Referring to the drawings, a
The
On the other hand, FIG. 9 and the like illustrate that three bypass diodes (Da, Db, and Dc in FIG. 9) are provided corresponding to the four solar cell strings in FIG.
On the other hand, the
On the other hand, the
In the figure, a plurality of sinker cells are connected in series by ribbons (133 in FIG. 12) to form a
On the other hand, each solar cell string can be electrically connected by a bus ribbon. 10 shows the first
10 shows a state in which the second
On the other hand, the ribbon connected to the first string, the
It is preferable that the
12 is an exploded perspective view of the solar cell module of FIG.
Referring to FIG. 12, the
The
The
Each
In the figure, it is illustrated that the
Thus, six
The
The
The
Here, the
On the other hand, the
The solar cell module and the solar cell system having the solar cell module according to the present invention are not limited to the configuration and method of the embodiments described above but the embodiments can be applied to all or a part of each embodiment Some of which may be selectively combined.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the present invention.
Claims (20)
And an inverter unit for converting DC power from the plurality of solar modules into AC power,
The inverter unit includes:
A communication unit for receiving power consumption information of a load from outside; And
When the peak value of the output current of the inverter section is out of the allowable range and the output power of the inverter section is larger than the power consumption of the load, the output power of the inverter section is lowered based on the power follow- And outputting a corresponding second output power,
Wherein,
To supply the AC power from the inverter section to the grid and the load when the peak value of the output current of the inverter section is within an allowable range and the output power of the inverter section is larger than the power consumption of the load And controls the output power of the inverter unit to be output without lowering the output power of the inverter unit,
Wherein,
And controlling the output power of the inverter section to be output to the load instead of the grid when the peak value of the output current of the inverter section is out of the allowable range and the output power of the inverter section is smaller than the power consumption of the load The solar system features.
And a power switching unit connected between the inverter unit and the grid,
Wherein the power switching unit comprises:
Wherein when the peak value of the output current of the inverter section is out of the allowable range and the power consumption of the load is equal to or greater than the output power of the inverter section, the AC power output from the inverter section is switched off so as to be supplied to the load Photovoltaic systems.
Wherein the power switching unit comprises:
And when the peak value of the output current of the inverter section is within the permissible range and the power consumption of the load is smaller than the output power of the inverter section, switching on is performed.
And a gateway for monitoring the AC power output from the inverter unit,
Wherein,
And receives power consumption information of the load from the gateway.
And a cable for performing power line communication between the inverter unit and the gateway.
The gateway comprises:
And calculates power consumption of the load based on a current flowing to the grid or a current flowing to the load.
Each of the photovoltaic modules includes:
A communication unit for receiving power consumption information of a load from outside; And
When the peak value of the output current of the solar module is out of the allowable range and the output power of the solar module is larger than the power consumption of the load, And a second output power corresponding to the power consumption of the load,
Wherein,
Wherein when the peak value of the output current of the photovoltaic module is within an allowable range and the output power of the photovoltaic module is larger than the power consumption of the load, the alternating- Controls to output the output power as it is, without lowering the output power of the solar module,
Wherein,
The output power of the photovoltaic module is output to the load rather than the grid when the output power of the photovoltaic module is smaller than the power consumption of the load, out of the peak value of the output current of the photovoltaic module, And the solar cell system.
And a power switching unit connected between the solar module and the grid,
Wherein the power switching unit comprises:
Wherein when the peak value of the output current of the photovoltaic module is out of the allowable range and the power consumption of the load is equal to or greater than the output power of the photovoltaic module, Wherein the solar cell is a solar cell.
Wherein the power switching unit comprises:
Wherein when the peak value of the output current of the photovoltaic module is within an allowable range and the power consumption of the load is smaller than the output power of the photovoltaic module, the photovoltaic system is switched on.
And a gateway for monitoring AC power output from the solar module,
The communication unit of each of the solar modules includes:
And receives power consumption information of the load from the gateway.
Each of the photovoltaic modules includes:
And a cable for performing power line communication between the solar module and the gateway.
The gateway comprises:
And calculates power consumption of the load based on a current flowing to the grid or a current flowing to the load.
A converter unit for converting the level of the DC power from the solar cell module;
An inverter unit for outputting the converted AC power based on the level-converted DC power from the converter unit;
A cable for outputting AC power from the inverter unit to the outside;
A communication unit for receiving power consumption information of a load from outside; And
When the peak value of the output current of the inverter section is out of the allowable range and the output power of the inverter section is larger than the power consumption of the load, the output power of the inverter section is lowered based on the power follow- And outputting a corresponding second output power,
Wherein,
To supply the AC power from the inverter section to the grid and the load when the peak value of the output current of the inverter section is within the allowable range and the output power of the inverter section is larger than the power consumption of the load And controls the output power of the inverter unit to be output without lowering the output power of the inverter unit,
Wherein,
When the peak value of the output current of the inverter section is out of the allowable range and the output power of the inverter section is smaller than the power consumption of the load, control is performed so that the output power of the inverter section is output to the load, .
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WO2022060643A1 (en) * | 2020-09-17 | 2022-03-24 | Fan Wang | Solar array monitoring and safety disconnect with a remote controller |
KR102360703B1 (en) * | 2021-11-29 | 2022-02-14 | 주식회사 엔서치랩 | A system for fault diagnosis and notice about solar farm |
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