CN104393835A - Photovoltaic module and photovoltaic power generation array - Google Patents
Photovoltaic module and photovoltaic power generation array Download PDFInfo
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- CN104393835A CN104393835A CN201410689725.6A CN201410689725A CN104393835A CN 104393835 A CN104393835 A CN 104393835A CN 201410689725 A CN201410689725 A CN 201410689725A CN 104393835 A CN104393835 A CN 104393835A
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- 238000005457 optimization Methods 0.000 claims abstract description 87
- 230000001105 regulatory effect Effects 0.000 claims description 19
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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
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- 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
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Abstract
The invention discloses a photovoltaic module and a photovoltaic power generation array. The photovoltaic module comprises a plurality of battery strings and a first power optimization module to an N<th> power optimization module; the plurality of battery strings are strung from any edge and divided into a first battery string group to an N<th> battery string group, wherein the number of battery strings in every battery string group is not less than 1 and N is an integer which is not less than 2; the first power optimization module is connected with the first battery string group, the second power optimization module is connected with the second battery string group, and the like; the i<th> power optimization module is used for adjusting the output current of the i<th> battery string group to be the preset current to be output when the output current and the preset current of the i<th> battery string group are different from each other, wherein the output power of the i<th> power optimization module is equal to the output power of the i<th> battery string group and i is a positive integer which is not larger than N. Accordingly, the condition that the photovoltaic module is mismatched with the photovoltaic power generation array due to the fact that the photovoltaic module is blocked is avoided and the high power generation capacity of the photovoltaic power generation array is ensured.
Description
Technical field
The present invention relates to technical field of solar batteries, more specifically, relate to a kind of photovoltaic module and photovoltaic power generation array.
Background technology
Solar cell, also claims photovoltaic cell, is a kind of semiconductor device illumination of the sun being directly converted to electric energy.Due to the converting electrical energy process environmental protection of solar power generation, can not cause environmental pollution, and solar energy is again renewable resource, therefore under current energy starved situation, the research of solar power generation is particularly important.
The one application of solar photovoltaic assembly and solar power generation, but the power output due to single photovoltaic module is often not enough to the power providing actual demand, therefore need multiple photovoltaic module to form photovoltaic power generation array with the requirement of satisfied generating in the mode of series, parallel.But, in photovoltaic power generation array practical application, due to large-area laying, often there will be photovoltaic module and be blocked and the situation of not light, make single photovoltaic module and photovoltaic power generation array mismatch, and then occur the situation of photovoltaic power generation array power loss.
Summary of the invention
In view of this, the invention provides a kind of photovoltaic module and photovoltaic power generation array, avoid photovoltaic module and be blocked and occur the situation with photovoltaic power generation array mismatch, ensure that the energy output of photovoltaic power generation array is high.
For achieving the above object, technical scheme provided by the invention is as follows:
A kind of photovoltaic module, comprising:
Multiple battery strings, multiple described battery strings, from any edge battery strings, is divided into the first battery strings group to N battery strings group, and the battery strings quantity in each described battery strings group is not less than 1, wherein, N be not less than 2 integer;
And the first power optimization module is to N power optimization module, and described first power optimization module is connected to the corresponding and described first battery strings group of N power optimization module to N battery strings group; Wherein, described i-th power optimization module is used for when the output current of described i-th battery strings group is not identical with predetermined current, the output current of described i-th battery strings group is regulated to be export after described predetermined current, and the power output of described i-th power optimization module is identical with the power output of described i-th battery strings group, i is the positive integer being not more than N.
Preferably, described first battery strings group is all identical to the battery strings quantity of N battery strings group.
Preferably, the battery strings quantity of described photovoltaic module is even number, and quantity is not less than 4, wherein,
Multiple described battery is from any edge battery strings, and every two battery strings are divided into a described battery strings group.
Preferably, described i-th power optimization module is connected with described i-th battery strings group by convergent belt.
Preferably, described i-th power optimization module comprises:
Modular converter be export after described predetermined current for regulating the output current of described i-th battery strings group, and the power output of described modular converter is identical with the power output of described i-th battery strings group;
The control module be connected with described modular converter, when the output current for detecting described i-th battery strings group is not identical with described predetermined current, controls described modular converter work.
Preferably, described i-th power optimization module also comprises:
The MPPT module be connected with described control module, for following the trail of the maximum power point that described i-th battery strings group exports, and regulates the power output of described i-th battery strings group to be export after predetermined power;
Wherein, described control module for detecting the output current of described MPPT module, and when the output current of described MPPT module is not identical with described predetermined current, controls described modular converter work.
Preferably, described modular converter is dc-dc.
A kind of photovoltaic power generation array, comprise multiple photovoltaic module, wherein, described photovoltaic module comprises:
Multiple battery strings, multiple described battery strings, from any edge battery strings, is divided into the first battery strings group to N battery strings group, and the battery strings quantity in each described battery strings group is not less than 1, wherein, N be not less than 2 integer;
And the first power optimization module is to N power optimization module, and described first power optimization module is connected to the corresponding and described first battery strings group of N power optimization module to N battery strings group; Wherein, described i-th power optimization module is used for when the output current of described i-th battery strings group is not identical with predetermined current, the output current of described i-th battery strings group is regulated to be export after described predetermined current, and the power output of described i-th power optimization module is identical with the power output of described i-th battery strings group, i is the positive integer being not more than N.
Preferably, described i-th power optimization module comprises:
Modular converter be export after described predetermined current for regulating the output current of described i-th battery strings group, and the power output of described modular converter is identical with the power output of described i-th battery strings group;
The control module be connected with described modular converter, when the output current for detecting described i-th battery strings group is not identical with described predetermined current, controls described modular converter work.
Preferably, described i-th power optimization module also comprises:
The MPPT module be connected with described control module, for following the trail of the maximum power point that described i-th battery strings group exports, and regulates the power output of described i-th battery strings group to be export after predetermined power;
Wherein, described control module for detecting the output current of described MPPT module, and when the output current of described MPPT module is not identical with described predetermined current, controls described modular converter work.
Compared to prior art, at least concrete following advantage of technical scheme provided by the invention:
A kind of photovoltaic module provided by the invention and photovoltaic power generation array, photovoltaic module comprises: multiple battery strings, multiple described battery strings is from any edge battery strings, be divided into the first battery strings group to N battery strings group, and the battery strings quantity in each described battery strings group is not less than 1, wherein, N be not less than 2 integer; And the first power optimization module is to N power optimization module, and described first power optimization module is connected to the corresponding and described first battery strings group of N power optimization module to N battery strings group; Wherein, described i-th power optimization module is used for when the output current of described i-th battery strings group is not identical with predetermined current, the output current of described i-th battery strings group is regulated to be export after described predetermined current, and the power output of described i-th power optimization module is identical with the power output of described i-th battery strings group, i is the positive integer being not more than N.
As shown in the above, technical scheme provided by the invention, by dividing into groups to the battery strings in photovoltaic module, and a power optimization module is all connected to each battery strings group, in the photovoltaic module course of work, if when its any region is blocked and makes this area cells string group output current weaken, can by the size outputing current to predetermined current of power optimization module regulating cell string group, photovoltaic module is avoided to occur the situation of internal consumption, and then avoid photovoltaic module and be blocked and occur the situation with photovoltaic power generation array mismatch, ensure that the energy output of photovoltaic power generation array is high.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The structural representation of a kind of photovoltaic module that Fig. 1 provides for the embodiment of the present application;
The structural representation of a kind of power optimization module that Fig. 2 provides for the embodiment of the present application;
The structural representation of the another kind of power optimization module that Fig. 3 provides for the embodiment of the present application.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As described in background, the one application of solar photovoltaic assembly and solar power generation, but the power output due to single photovoltaic module is often not enough to the power providing actual demand, therefore need multiple photovoltaic module to form photovoltaic power generation array with the requirement of satisfied generating in the mode of series, parallel.But, in photovoltaic power generation array practical application, due to large-area laying, often there will be photovoltaic module and be blocked and the situation of not light, make single photovoltaic module and photovoltaic power generation array mismatch, and then occur the situation of photovoltaic power generation array power loss.
Based on this, the embodiment of the present application provides a kind of photovoltaic module, shown in composition graphs 1 to Fig. 3, is described in detail to the structure of the photovoltaic module that the embodiment of the present application provides.
Shown in figure 1, be the structural representation of a kind of photovoltaic module that the embodiment of the present application provides, wherein, photovoltaic module comprises:
Multiple battery strings 10, multiple battery strings 10, from any edge battery strings, be divided into the first battery strings group 101 to N battery strings group 10n, and the battery strings quantity in each battery strings group is not less than 1, wherein, N be not less than 2 integer;
And the first power optimization module 201 is to N power optimization module 20n, and the first power optimization module 201 is connected to N battery strings group 10n to N power optimization module 20n is corresponding with the first battery strings group 101; Wherein, i-th power optimization module is used for when the output current of the i-th battery strings group is not identical with predetermined current, the output current of the i-th battery strings group is regulated to be export after predetermined current, and the power output of the i-th power optimization module is identical with the power output of the i-th battery strings group, i is the positive integer being not more than N.
Concrete, shown in figure 1, photovoltaic module comprises multiple battery strings 10, wherein, any battery strings 10 collects the electric current of secondary grid line by the welding 11 be formed in the main gate line of its solar battery sheet, the electric current of then welding 11 collection, is flowed out by the convergent belt 20 being arranged at battery strings 10 end.Wherein, in the photovoltaic module that the embodiment of the present application provides, multiple battery strings 10 is from any edge battery strings, be divided into the first battery strings group 101 to N battery strings group 10n, and each battery strings group all connects a power optimization module, wherein, the i-th power optimization module is connected with the i-th battery strings group by convergent belt.
More specifically, the positive-negative output end of jth battery strings is connected to corresponding two inputs of jth power optimization module respectively, the output of jth power optimization device is then connected directly to the input of jth+1 battery strings group, be connected in series between all battery strings that ensure that photovoltaic module, j is the positive integer being less than N.
As shown in the above, the technical scheme that the embodiment of the present application provides, by dividing into groups to the battery strings in photovoltaic module, and a power optimization module is all connected to each battery strings group, in the photovoltaic module course of work, if when its any region is blocked and makes this area cells string group output current weaken, can by the size outputing current to predetermined current of power optimization module regulating cell string group, photovoltaic module is avoided to occur the situation of internal consumption, and then avoid photovoltaic module and be blocked and occur the situation with photovoltaic power generation array mismatch, ensure that the energy output of photovoltaic power generation array is high.
Further, the conveniently setting of the parameter of power optimization module, the optional first battery strings group 101 of the embodiment of the present application is all identical to the battery strings quantity of N battery strings group 10n.It should be noted that, in other embodiments of the application, the first battery strings group is in N battery strings group, and the battery strings quantity of each battery strings group can also be all not identical; Or the first battery strings group is in N battery strings group, and the battery strings quantity of percentage of batteries string group is identical, and the battery strings quantity of percentage of batteries string group is not identical, needs to carry out concrete design according to practical application.
Further, in order to avoid the waste of power optimization module, and ensure to make complexity in actual applications low, the battery strings quantity of the photovoltaic module that the embodiment of the present application provides is even number, and quantity is not less than 4, wherein,
Multiple battery strings is from any edge battery strings, and every two battery strings are divided into a battery strings group.
In addition, when the battery strings quantity of photovoltaic module is odd number, equally can from any edge battery strings, every two battery strings are divided into a battery strings group, and last battery strings is one group; Or, when the battery strings quantity of photovoltaic module is odd number, can from any edge battery strings, this edge battery strings is one group, and then every two battery strings are divided into one group; Or, when the battery strings quantity of photovoltaic module is odd number, from any edge battery strings, every two battery strings are divided into one group, and in centre, a certain battery strings is one group, then every two battery strings are divided into one group again, and the embodiment of the present application does not do concrete restriction to this, need to carry out specific design according to practical application.
In addition, shown in figure 2, be the structural representation of a kind of power optimization module that the embodiment of the present application provides, wherein, the i-th power optimization module comprises:
Modular converter 21 be export after predetermined current for regulating the output current of the i-th battery strings group, and the power output of modular converter is identical with the power output of the i-th battery strings group;
The control module 22 be connected with modular converter 21, when the output current for detecting the i-th battery strings group is not identical with predetermined current, controls modular converter 21 and working.
That is, control module detects the output current of battery strings group in real time, when the output current of battery strings group is within predetermined current scope, makes the output of battery strings group be directly inputted in next stage battery strings group; And when detecting that the output current of battery strings group is in outside predetermined current scope, then control modular converter work, modular converter when the power output of battery strings group ensureing to be connected with its input is constant, regulate this battery strings group output current to predetermined current after export.Wherein, modular converter can be dc-dc, by changing the output voltage of duty ratio and regulating cell string group, to ensure when power is constant, regulating cell string group output current to predetermined current, avoid mismatch to occur the situation of internal consumption.Wherein, predetermined current is the electric current of the maximum power point that photovoltaic power generation array is followed the trail of by array inverter MPPT (Maximum PowerPoint Tracking, MPPT maximum power point tracking).
Further, based on the power optimization module shown in Fig. 2, the embodiment of the present application additionally provides another kind of power optimization module, ensure that the power output of battery strings group maximizes, shown in concrete reference diagram 3, be the structural representation of the another kind of power optimization module that the embodiment of the present application provides, in the power optimization module shown in Fig. 3 and Fig. 2, corresponding part does not do unnecessary repeating, wherein, the i-th power optimization module shown in Fig. 3 also comprises:
The MPPT module 23 be connected with control module 22, for following the trail of the maximum power point that the i-th battery strings group exports, and regulates the power output of the i-th battery strings group to be export after predetermined power;
Wherein, control module 22 for detecting the output current of MPPT module 23, and when the output current of MPPT module is not identical with predetermined current, controls modular converter 21 and works.
Accordingly, the embodiment of the present application additionally provides a kind of photovoltaic power generation array, comprises multiple photovoltaic module, and wherein, photovoltaic module is identical with the photovoltaic module that above-mentioned any embodiment provides, and photovoltaic module comprises:
Multiple battery strings, multiple battery strings, from any edge battery strings, be divided into the first battery strings group to N battery strings group, and the battery strings quantity in each battery strings group is not less than 1, wherein, N be not less than 2 integer;
And the first power optimization module is to N power optimization module, and the first power optimization module is connected to N battery strings group to N power optimization module is corresponding with the first battery strings group; Wherein, i-th power optimization module is used for when the output current of the i-th battery strings group is not identical with predetermined current, the output current of the i-th battery strings group is regulated to be export after predetermined current, and the power output of the i-th power optimization module is identical with the power output of the i-th battery strings group, i is the positive integer being not more than N.
Wherein, the i-th power optimization module comprises:
Modular converter be export after predetermined current for regulating the output current of the i-th battery strings group, and the power output of modular converter is identical with the power output of the i-th battery strings group;
The control module be connected with modular converter, when the output current for detecting the i-th battery strings group is not identical with predetermined current, controls modular converter work.
Further, the i-th power optimization module also comprises:
The MPPT module be connected with control module, for following the trail of the maximum power point that the i-th battery strings group exports, and regulates the power output of the i-th battery strings group to be export after predetermined power;
Wherein, control module for detecting the output current of MPPT module, and when the output current of MPPT module is not identical with predetermined current, controls modular converter work.
A kind of photovoltaic module that the embodiment of the present application provides and photovoltaic power generation array, photovoltaic module comprises: multiple battery strings, multiple described battery strings is from any edge battery strings, be divided into the first battery strings group to N battery strings group, and the battery strings quantity in each described battery strings group is not less than 1, wherein, N be not less than 2 integer; And the first power optimization module is to N power optimization module, and described first power optimization module is connected to the corresponding and described first battery strings group of N power optimization module to N battery strings group; Wherein, described i-th power optimization module is used for when the output current of described i-th battery strings group is not identical with predetermined current, the output current of described i-th battery strings group is regulated to be export after described predetermined current, and the power output of described i-th power optimization module is identical with the power output of described i-th battery strings group, i is the positive integer being not more than N.
As shown in the above, the technical scheme that the embodiment of the present application provides, by dividing into groups to the battery strings in photovoltaic module, and a power optimization module is all connected to each battery strings group, in the photovoltaic module course of work, if when its any region is blocked and makes this area cells string group output current weaken, can by the size outputing current to predetermined current of power optimization module regulating cell string group, photovoltaic module is avoided to occur the situation of internal consumption, and then avoid photovoltaic module and be blocked and occur the situation with photovoltaic power generation array mismatch, ensure that the energy output of photovoltaic power generation array is high.
Claims (10)
1. a photovoltaic module, is characterized in that, comprising:
Multiple battery strings, multiple described battery strings, from any edge battery strings, is divided into the first battery strings group to N battery strings group, and the battery strings quantity in each described battery strings group is not less than 1, wherein, N be not less than 2 integer;
And the first power optimization module is to N power optimization module, and described first power optimization module is connected to the corresponding and described first battery strings group of N power optimization module to N battery strings group; Wherein, described i-th power optimization module is used for when the output current of described i-th battery strings group is not identical with predetermined current, the output current of described i-th battery strings group is regulated to be export after described predetermined current, and the power output of described i-th power optimization module is identical with the power output of described i-th battery strings group, i is the positive integer being not more than N.
2. photovoltaic module according to claim 1, is characterized in that, described first battery strings group is all identical to the battery strings quantity of N battery strings group.
3. photovoltaic module according to claim 2, is characterized in that, the battery strings quantity of described photovoltaic module is even number, and quantity is not less than 4, wherein,
Multiple described battery is from any edge battery strings, and every two battery strings are divided into a described battery strings group.
4. photovoltaic module according to claim 1, is characterized in that, described i-th power optimization module is connected with described i-th battery strings group by convergent belt.
5. photovoltaic module according to claim 1, is characterized in that, described i-th power optimization module comprises:
Modular converter be export after described predetermined current for regulating the output current of described i-th battery strings group, and the power output of described modular converter is identical with the power output of described i-th battery strings group;
The control module be connected with described modular converter, when the output current for detecting described i-th battery strings group is not identical with described predetermined current, controls described modular converter work.
6. photovoltaic module according to claim 5, is characterized in that, described i-th power optimization module also comprises:
The MPPT module be connected with described control module, for following the trail of the maximum power point that described i-th battery strings group exports, and regulates the power output of described i-th battery strings group to be export after predetermined power;
Wherein, described control module for detecting the output current of described MPPT module, and when the output current of described MPPT module is not identical with described predetermined current, controls described modular converter work.
7. photovoltaic module according to claim 5, is characterized in that, described modular converter is dc-dc.
8. a photovoltaic power generation array, is characterized in that, comprises multiple photovoltaic module, and wherein, described photovoltaic module comprises:
Multiple battery strings, multiple described battery strings, from any edge battery strings, is divided into the first battery strings group to N battery strings group, and the battery strings quantity in each described battery strings group is not less than 1, wherein, N be not less than 2 integer;
And the first power optimization module is to N power optimization module, and described first power optimization module is connected to the corresponding and described first battery strings group of N power optimization module to N battery strings group; Wherein, described i-th power optimization module is used for when the output current of described i-th battery strings group is not identical with predetermined current, the output current of described i-th battery strings group is regulated to be export after described predetermined current, and the power output of described i-th power optimization module is identical with the power output of described i-th battery strings group, i is the positive integer being not more than N.
9. photovoltaic power generation array according to claim 8, is characterized in that, described i-th power optimization module comprises:
Modular converter be export after described predetermined current for regulating the output current of described i-th battery strings group, and the power output of described modular converter is identical with the power output of described i-th battery strings group;
The control module be connected with described modular converter, when the output current for detecting described i-th battery strings group is not identical with described predetermined current, controls described modular converter work.
10. photovoltaic power generation array according to claim 9, is characterized in that, described i-th power optimization module also comprises:
The MPPT module be connected with described control module, for following the trail of the maximum power point that described i-th battery strings group exports, and regulates the power output of described i-th battery strings group to be export after predetermined power;
Wherein, described control module for detecting the output current of described MPPT module, and when the output current of described MPPT module is not identical with described predetermined current, controls described modular converter work.
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| CN106533355A (en) * | 2015-09-12 | 2017-03-22 | Imec 非营利协会 | Reconfigurable photovoltaic module |
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