KR20170105840A - Power matching device and photovoltaic module including the same - Google Patents
Power matching device and photovoltaic module including the same Download PDFInfo
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- KR20170105840A KR20170105840A KR1020160029016A KR20160029016A KR20170105840A KR 20170105840 A KR20170105840 A KR 20170105840A KR 1020160029016 A KR1020160029016 A KR 1020160029016A KR 20160029016 A KR20160029016 A KR 20160029016A KR 20170105840 A KR20170105840 A KR 20170105840A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims description 22
- 230000002093 peripheral effect Effects 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 16
- 239000003990 capacitor Substances 0.000 description 14
- 239000000758 substrate Substances 0.000 description 11
- 239000003566 sealing material Substances 0.000 description 9
- 239000004065 semiconductor Substances 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- 206010010071 Coma Diseases 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 239000000565 sealant Substances 0.000 description 2
- 239000005341 toughened glass Substances 0.000 description 2
- 229910004613 CdTe Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
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- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
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Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
-
- 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
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
-
- 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
-
- 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
Abstract
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.
An object of the present invention is to provide a solar module capable of supplying power matched to power output from an ambient solar module.
According to an aspect of the present invention, there is provided a solar module including a solar cell module including a plurality of solar cells, and a power matching unit for varying a level of an input voltage from the solar cell module, The power matching unit includes a first level converting unit for converting a level of an input voltage from the solar cell module, a second level converting unit converting the level of the voltage converted by the first level converting unit to a second level, And a control unit for controlling the first level converting unit and the second level converting unit, wherein the control unit sets the first level change amount, the second level change amount, and the second level change amount to match the set target power based on the input power from the solar cell module, And the second level change amount, respectively, and the first lattice change amount is larger than the second level change amount.
According to another aspect of the present invention, there is provided an apparatus for matching an electric power, the apparatus comprising: a first level converter for converting a level of an input voltage from a solar cell module; A second level converting section for converting the level of the voltage converted by the first level converting section to a second level and outputting the output voltage, and a control section for controlling the first level converting section and the second level converting section, The control unit controls the first level converting unit and the second level converting unit to correspond to the set first level change amount and the second level change amount for matching with the set target power based on the input power from the solar cell module And the first lane change amount is larger than the second level change amount.
According to the embodiment of the present invention, the solar module includes a solar cell module having a plurality of solar cells, and a power matching unit for varying the level of an input voltage from the solar cell module, A first level converting section for converting a level of an input voltage from the battery module, a second level converting section for converting the level of the voltage converted by the first level converting section to a second level and outputting an output voltage, And a control unit for controlling the level converting unit and the second level converting unit based on the input power from the solar cell module. The control unit controls the first level change amount and the second level change amount, So that the power matched to the power output from the peripheral solar module can be supplied by controlling the first level converter and the second level converter.
Particularly, by making the first lattice change amount larger than the second level change amount, it becomes possible to largely change the voltage level in the first level conversion section and perform fine adjustment in the second level conversion section.
On the other hand, the second level converter can stabilize the voltage of the output voltage, thereby stably supplying the power matched with the power.
On the other hand, by receiving the target power information from the input unit and varying the level of the output voltage output from the converter based on the received target power information, the power matched to the desired target power can be simply supplied.
Meanwhile, since the power matching unit can be detachably attached to the back surface of the solar cell module, the solar cell module having the power matching unit can be simply implemented as a solar cell module capable of power matching.
On the other hand, the power matching unit is provided in the second junction box different from the junction box, and the second junction box can be detachably attached to the back surface of the solar cell module, so that the convenience of use can be increased.
1 is an example of a photovoltaic system according to an embodiment of the present invention.
2 is a diagram illustrating a solar module replacement in the solar photovoltaic system of FIG.
3 is a front view of a solar module according to an embodiment of the present invention.
Fig. 4 is a rear view of the solar module of Fig. 3; Fig.
5A is a diagram showing an example of a power matching unit in the solar module of FIG.
5B is a diagram showing another example of the power matching unit in the solar module of FIG.
5C is a diagram showing another example of the power matching unit in the solar module of FIG.
6A to 6C are diagrams illustrating various examples of the internal circuit diagram of the power matching unit of FIG. 5A.
7A is a diagram illustrating a voltage selection unit that can be disposed in the power matching unit.
Fig. 7B is a detailed view of the input portion of Figs. 6A to 6C. Fig.
Figs. 8A to 8D are diagrams showing various examples of the arrangement of the power matching units in Figs. 5A to 5B.
FIG. 9 is an exploded perspective view of the solar cell module of FIG. 3. FIG.
10 is a flowchart illustrating an operation method of a solar module according to an embodiment of the present invention.
11 to 12B are views referred to in the description of the operation method 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. Accordingly, the terms "module" and "part" may be used interchangeably.
Fig. 1 is an example of a solar light system according to an embodiment of the present invention, and Fig. 2 is a diagram illustrating a solar module replacement in the solar light system of Fig.
Referring to the drawings, a
In particular, it may be a
For example, as shown in FIG. 2, each of the plurality of solar modules 50a1 to 50a8 can supply power of 270W (= 30V (= 0.5 * 60 cells) * 9A) When a module is used, the
On the other hand, when a failure occurs in any of the plurality of solar modules 50a1 to 50a8 and the replacement of the corresponding solar module 50a5 is required, as a solar module of the same manufacturer, It is desirable to replace the photovoltaic module with a photovoltaic module supplying the same power.
However, as the performance of the solar module is improved, the power available for each solar module is gradually increasing. Accordingly, it may not be easy to purchase a photovoltaic module of the same model as the photovoltaic module 50a5 or a photovoltaic module that supplies the same power approximately several years later.
In order to solve this problem, the present invention proposes a circuit configuration in which a solar module to be replaced supplies power substantially equal to the supply power of an adjacent solar module.
That is, the solar module according to the embodiment of the present invention varies the level of the output voltage output from the converter so as to match with the target power, which is the same power as the peripheral solar module.
To this end, the photovoltaic module according to an embodiment of the present invention may include a
2, when the
Specifically, the
For example, when the
Thus, by replacing the power matched
Various examples of the
3 is a front view of a solar module according to an embodiment of the present invention, and FIG. 4 is a rear view of the solar module shown in FIG.
Referring to the drawings, a
The
In FIG. 5A and the like, three bypass diodes (Da, Db, and Dc in FIG. 5A) are provided corresponding to the four solar cell strings in FIG.
Meanwhile, the
The power matching unit can convert the DC power supplied from the
On the other hand, the
In the figure, a plurality of sink cells are connected in series by ribbons (133 in FIG. 9) to form a
On the other hand, each solar cell string can be electrically connected by a bus ribbon. 3 is a sectional view showing the first
3 shows the second
On the other hand, the ribbon connected to the first string, the
It is preferable that the
5A is a diagram showing an example of a power matching unit in the solar module of FIG.
Referring to the drawings, the
Meanwhile, 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
The
5A, the
At this time, the
The
In the figure, the
The
In particular, the
For example, the
Next, the
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 converted current detector E detects the converted current ic3 outputted from the
The output current detection unit C senses the output current ic2 output from the second
On the other hand, the
Specifically, the
In particular, the
Particularly, by making the first lane change amount larger than the second level change amount, the voltage level of the
On the other hand, the
On the other hand, the
On the other hand, the
On the other hand, when the difference between the target power and the input power is equal to or greater than a predetermined value, the
On the other hand, when the difference between the target power and the input power is equal to or greater than a predetermined value, the
On the other hand, the
On the other hand, the
Specifically, the
Alternatively, the
That is, the
On the other hand, the
In order to match with the set target power based on the input power from the
In particular, the
On the other hand, the
On the other hand, the
On the other hand, the target power can correspond to the output power of the adjacent solar module. This target power can be received via power line communication from an adjacent solar module.
On the other hand, the
5B is a diagram showing another example of the power matching unit in the solar module of FIG.
Referring to the drawings, the
Meanwhile, the
The
That is, the voltage corresponding to the set target power can be input to the input terminal of the first
For this, the
6A to 6C are diagrams illustrating various examples of the internal circuit diagram of the power matching unit of FIG. 5A.
First, FIG. 6A illustrates a power matching unit 500aa corresponding to the
The power matching unit 500aa may include a first
Particularly, the resistance value of the variable resistive element Rb is varied by the variable signal Srb corresponding to the input signal Stp of the
On the other hand, the
Meanwhile, 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 may be connected to the anode of the diode D1.
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
Next, FIG. 6B illustrates a power matching unit 500ab corresponding to the
The power matching unit 500ab may include a first
In particular, the resistance value of the variable resistive element Rb is varied by the variable signal Srb corresponding to the input signal Stp of the
On the other hand, the
On the other hand, the
The
On the other hand, the switching element Sa in the
Next, FIG. 6C illustrates a power matching unit 500ac corresponding to the
The power matching unit 500ac may include a first
Particularly, the duty is varied by the switching control signal Ss1 corresponding to the input signal Stp of the
On the other hand, the
On the other hand, the
6A to 6C, the first and second level converting units can be modified in various ways.
The first level converting section may include a plurality of resistive elements or a transformer. Or the first level converter may be any one of a boost converter, a buck converter, a buck boost converter, a flyback converter, a tap inductor converter, a forward converter, and the like.
Meanwhile, the second level converter may be any one of a variety of variations, for example, a stalk converter, a buck converter, a buck boost converter, a flyback converter, a tap inductor converter, a forward converter and the like.
Meanwhile, the first level converting unit and the second level converting unit in the
7A is a diagram illustrating a voltage selection unit that can be disposed in the power matching unit.
Referring to the drawing, a
To this end, the
That is, the
The
In the figure, the
On the other hand, it is possible to further include a resistance element and a diode element arranged at input ends of the plurality of
Fig. 7B is a detailed view of the input portion of Figs. 6A to 6C. Fig.
Referring to the drawings, the
When the
In the figure, 21V / 6A, 42V / 6A, 49V / 9A, 63V / 10A and the like are exemplified as examples of a plurality of target powers, but various modifications are possible. For example, the target power corresponding to 30V / 9A corresponding to that described in the explanation of Fig. 1 and the like can be further exemplified.
Figs. 8A to 8D are diagrams showing various examples of the arrangement of the power matching units in Figs. 5A to 5B.
8A illustrates that the
FIG. 8B illustrates that the
8C illustrates that only the
FIG. 8D illustrates that only the
FIG. 9 is an exploded perspective view of the solar cell module of FIG. 3. FIG.
Referring to FIG. 9, the
The
The
Each
In the figure, it is illustrated that the
Thus, six
The
The
The
Here, the
On the other hand, the
FIG. 10 is a flowchart illustrating an operation method of a solar module according to an embodiment of the present invention, and FIGS. 11 to 12B are diagrams referred to the description of the control method of FIG.
10, the input current sensing unit A and the input voltage sensing unit B of the
The
Then, the
Next, the
The
As described in Figs. 1 and 2, in a state where each of the plurality of solar modules 50a1 to 50a8 supplies power of 270W (= 30V (= 0.5 * 60 cells) * 9A) When a failure occurs in the module 50a5 and the solar module 50a5 needs to be replaced, the
The
More specifically, when the surrounding solar module is a solar module having 60 cells and the
Thus, by replacing the power matched
11 is a graph showing the relation between the voltage versus power curve VPC1 by the solar cell module of the peripheral solar module and the voltage versus power curve VPC2 by the
VPC1 and VPC12 are compared, it can be seen that the voltage range that can be supplied from the
On the other hand, according to the voltage versus power curve VPC1 of the peripheral solar module, since the power increases from the voltage V1 to the voltage Vmpp1 by the maximum power point tracking algorithm (MPPT), the calculated power is renewed . Then, since the power decreases from the voltage Vmpp1 to the voltage V2, Pmpp1 corresponding to the voltage Vmpp1 at the point mpp1 is determined as the maximum power.
Accordingly, adjacent solar cell modules supply the voltage Vmpp1 and the power of Pmpp1 corresponding to the Impp1 current, as shown in Fig. 12A. Here, the Vmpp1 voltage is approximately 30 V, the Impp1 current is approximately 9 A, and the Pmpp1 power may be 270 W. [
According to the voltage-versus-power curve VPC2 of the photovoltaic module of the present invention, the
As described above, since the target power of the peripheral solar module is Pmpp1, the
That is, the
It is to be understood that the invention is not to be limited in its application to the details of construction and the manner in which the above described embodiments of the invention are put into practice, .
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 a power matching unit for varying a level of an input voltage from the solar cell module,
Wherein the power matching unit comprises:
A first level converter for converting a level of an input voltage from the solar cell module;
A second level converter for converting a level of the voltage converted by the first level converter to a second level and outputting an output voltage;
And a controller for controlling the first level converter and the second level converter,
Wherein,
And a control unit for controlling the first level converting unit and the second level converting unit in correspondence with the set first level changing amount and the second level changing amount for matching with the set target power based on the input power from the solar cell module In addition,
And the first lattice change amount is larger than the second level change amount.
Wherein the power matching unit comprises:
An input current detector for detecting an input current input to the first level converter;
An input voltage detector for detecting an input voltage input to the first level converter;
A conversion current detector for detecting a conversion current output to the first level converter;
A conversion voltage detector for detecting a conversion voltage output to the first level converter;
An output current detector for detecting an output current output from the second level converter;
And an output voltage detector for detecting an output voltage output from the second level converter,
Wherein,
And calculates the input power based on the input current and the input voltage from the solar cell module.
Wherein,
And controls the first level converter so that the output power of the first level converter matches the target power when the difference between the target power and the input power is equal to or greater than a predetermined value.
Wherein the second level converter comprises:
Wherein the first level converting unit is disposed at an output terminal of the first level converting unit and stabilizes the level of the voltage converted by the first level converting unit.
Wherein the first level converting unit comprises:
A plurality of resistive elements, or a transformer, and performs a voltage distribution with respect to the input voltage based on the set target electric power.
Wherein the power matching unit comprises:
And a voltage selection unit disposed at an input terminal of the first level conversion unit and for distributing and selecting an input voltage from the solar cell module.
And an input unit for setting a target power,
Wherein,
Wherein the control unit receives the target power information from the input unit and controls the level of the output voltage output from the first level conversion unit to be variable based on the received target power information.
And a junction box having at least one bypass diode for receiving DC power from the solar cell module,
Wherein the power matching unit is detachably attached to the junction box.
A junction box having at least one bypass diode for receiving DC power from the solar cell module; And
And a second junction box different from the junction box,
Wherein the power matching unit is provided in the second junction box,
Wherein the second junction box is detachably attachable to the back surface of the solar cell module.
The target power
And corresponds to an output power of an adjacent solar module.
Wherein,
Wherein the control unit calculates a point corresponding to the target electric power for the DC voltage section supplied from the solar cell module and controls to supply an output voltage corresponding to the calculated point.
A first level converter for converting a level of an input voltage from the solar cell module;
A second level converter for converting a level of the voltage converted by the first level converter to a second level and outputting an output voltage;
And a controller for controlling the first level converter and the second level converter,
Wherein,
And a control unit for controlling the first level converting unit and the second level converting unit in correspondence with the set first level changing amount and the second level changing amount for matching with the set target power based on the input power from the solar cell module In addition,
Wherein the first lattice change amount is larger than the second level change amount.
Wherein,
An input current detector for detecting an input current input to the first level converter;
An input voltage detector for detecting an input voltage input to the first level converter;
A conversion current detector for detecting a conversion current output to the first level converter;
A conversion voltage detector for detecting a conversion voltage output to the first level converter;
An output current detector for detecting an output current output from the second level converter;
And an output voltage detector for detecting an output voltage output from the second level converter,
Wherein,
And calculates the input power based on the input current and the input voltage from the solar cell module.
Wherein,
Wherein the control unit controls the first level converting unit so that the output power of the first level converting unit matches the target power when the difference between the target power and the input power is equal to or greater than a predetermined value.
Wherein the second level converter comprises:
Wherein the first level converting unit is disposed at an output terminal of the first level converting unit and stabilizes the level of the voltage converted by the first level converting unit.
Wherein the first level converting unit comprises:
A plurality of resistive elements, or a transformer, and performs voltage division with respect to the input voltage based on the set target electric power.
And a voltage selection unit disposed at an input terminal of the first level conversion unit and for distributing and selecting an input voltage from the solar cell module.
And an input unit for setting a target power,
Wherein,
Wherein the control unit receives the target power information from the input unit and controls the level of the output voltage output from the first level conversion unit to be variable based on the received target power information.
The target power
Wherein the output power corresponds to the output power of an adjacent solar module.
Wherein,
Calculates a point corresponding to the target power with respect to a DC voltage section supplied from the solar cell module, and controls to supply an output voltage corresponding to the calculated point.
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| KR1020160029016A KR101818999B1 (en) | 2016-03-10 | 2016-03-10 | Power matching device and photovoltaic module including the same |
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| JP2019102601A (en) * | 2017-11-30 | 2019-06-24 | 三菱電機株式会社 | Solar cell module and solar cell system |
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| US20090217965A1 (en) * | 2006-04-21 | 2009-09-03 | Dougal Roger A | Apparatus and method for enhanced solar power generation and maximum power point tracking |
| KR101490853B1 (en) | 2014-01-28 | 2015-02-09 | (주)엔지피 | Grid-connected photovoltaic system and operating method thereof |
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