CN102237690A - Method for improving overall efficiency of photovoltaic inverter system - Google Patents
Method for improving overall efficiency of photovoltaic inverter system Download PDFInfo
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- CN102237690A CN102237690A CN2011100973021A CN201110097302A CN102237690A CN 102237690 A CN102237690 A CN 102237690A CN 2011100973021 A CN2011100973021 A CN 2011100973021A CN 201110097302 A CN201110097302 A CN 201110097302A CN 102237690 A CN102237690 A CN 102237690A
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- photovoltaic
- inverter
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- subarray
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
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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
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/20—Climate change mitigation technologies for sector-wide applications using renewable energy
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Abstract
The invention relates to a method for improving the overall efficiency of a photovoltaic inverter system, belonging to the technical field of photovoltaic applications. The technical scheme is that the photovoltaic inverter system comprises more than two photovoltaic sub arrays and each sub array is configured with an inverter with an MPPT (maximum power point tracking) function, wherein the photovoltaic sub array is composed of battery boards in series-parallel connection, the number of the battery boards in series-parallel connection are matched with the input voltage and current of the inverter, and each battery board string is connected with a diode in series in order to ensure the interaction among the battery board group strings. The photovoltaic inverter system provided by the invention has the advantages of high overall generating efficiency, good reliability and more generation capacity in the whole life cycle.
Description
Technical field:
The present invention relates to
OnePlant the method that improves photovoltaic inversion system whole efficiency, belong to the photovoltaic application technical field.
Background technology:
The full name of MPPT controller " MPPT maximum power point tracking " (Maximum Power Point Tracking) controller for solar.Be accompanied by the continuous minimizing of socioeconomic fast development, fossil energy sources and going from bad to worse of environment, the regenerative resource of cleaning has been subjected to the generally attention of countries in the world as a kind of important method that solves the energy and environment problem.Solar energy is with advantages such as its aboundresources, cleanings, and since the eighties in last century, solar energy generation technology is continued, development fast.At present, the photovoltaic inversion system of background technology, solar panel is formed a photovoltaic array by the form of series and parallel, by an inverter overall optical photovoltaic array is carried out MPPT control, the direct current of photovoltaic array output is converted into alternating current generates electricity by way of merging two or more grid systems.Just under all identical ideal state of electrical quantity, temperature, the illumination condition of all cell panels, the whole efficiency of system is higher relatively for existing photovoltaic inversion system.In fact, when being subjected to the blocking of shadow of object such as black clouds, chimney, trees and high building building when solar panel, when the installation of cell panel when incomplete same, when there are differences between the cell panel of producing, when some cell panel is damaged, when on the cell panel dirt accumulation being arranged, the whole efficiency of system will descend significantly.The poor reliability of existing system, in case inverter breaks down, whole system is in paralyzed state, has a strong impact on the energy output of photovoltaic system in whole life.
Summary of the invention:
The object of the invention provides a kind of method that improves photovoltaic inversion system whole efficiency, improves the entire system generating efficiency, increases gross generation in systems life cycle, and the reliability height solves the problems referred to above that exist in the background technology.
Technical scheme of the present invention is: a kind of method that improves photovoltaic inversion system whole efficiency, photovoltaic inversion system comprise plural at least photovoltaic subarray, inverter with MPPT function of each subarray configuration; Wherein the photovoltaic subarray is made up of the cell panel connection in series-parallel, and the piece number of series and parallel cell panel will be complementary with input voltage, the electric current of inverter, for guaranteeing influencing each other between the cell plate group string, need distinguish series diode on each cell panel string.
As preferably, each photovoltaic subarray has only a string cell panel to be in series, inverter with MPPT function of each battery pack string configuration; This system is particularly suitable for the medium-capacity plant engineering, as the power plant project of community, factory.
As preferably, each photovoltaic subarray has only a cell panel to constitute, inverter with MPPT function of every cell panel configuration; This system is particularly suitable for the low capacity engineering, as family's engineering, and the BIPV engineering.
The invention has the beneficial effects as follows: 1, entire system generating efficiency height; Photovoltaic inversion system of the present invention carries out accurate MPPT control owing to having adopted at each photovoltaic subarray, under the unequal undesirable condition that even shades such as tree, chimney, building block around, cloud and mist variation, dirt accumulation and component efficiency decay, can guarantee that also each photovoltaic subarray exports with maximum power, thereby improve the whole efficiency of photovoltaic system.2, gross generation is many in systems life cycle; In photovoltaic inversion system of the present invention, in case the inverter of certain photovoltaic subarray breaks down, can not influence other photovoltaic subarray operate as normal, the system that guaranteed sends more electric weight in whole life.3, reliability height; In photovoltaic inversion system of the present invention, the work that each photovoltaic subarray is relatively independent even the inverter of certain photovoltaic subarray breaks down, can not influence other photovoltaic subarray operate as normal yet, thereby has improved the reliability of entire system.
Description of drawings:
Fig. 1 is the photovoltaic generating system schematic diagram of prior art;
Fig. 2 is the embodiment of the invention one schematic diagram;
Fig. 3 is the embodiment of the invention two schematic diagrames;
Fig. 4 is the embodiment of the invention three schematic diagrames.
Embodiment:
Below in conjunction with accompanying drawing, the invention will be further described by embodiment.
Embodiment one, for the invention provides the unified embodiment of photovoltaic contravariant system, with reference to accompanying drawing 2, this embodiment system is made up of photovoltaic subarray 1, photovoltaic subarray 2, inverter 3, inverter 4, the output of photovoltaic subarray 1 is connected with the input of inverter 3, and 3 pairs of photovoltaic subarrays of inverter 1 carry out MPPT control, and photovoltaic subarray 1 is exported with maximum power, and the direct current that photovoltaic subarray 1 is produced changes into alternating current, is connected with electrical network then.Similarly, the output of photovoltaic subarray 2 is connected with the input of inverter 4, and 4 pairs of photovoltaic subarrays of inverter 2 carry out MPPT control, and photovoltaic subarray 2 is exported with maximum power, and the direct current that photovoltaic subarray 2 is produced changes into alternating current, is connected with electrical network then.Wherein photovoltaic subarray 1 is made up of the cell panel connection in series-parallel, the piece number of series and parallel cell panel will be complementary with input voltage, the electric current of inverter 3, for guaranteeing influencing each other between the cell plate group string, need on cell panel string 11, cell panel string 12, cell panel string 13, distinguish series diode.In like manner, photovoltaic subarray 2 is made up of the cell panel connection in series-parallel, and the piece number of series and parallel cell panel will be complementary with input voltage, the electric current of inverter 4, difference series diode on cell panel string 21, the cell panel string 22.This embodiment system is particularly suitable for photovoltaic battery panel and installs towards situation inequality or that the cell panel specification is inequality.
Embodiment two, and for another embodiment of photovoltaic inversion system provided by the invention, with reference to accompanying drawing 3, a string cell panel is formed a photovoltaic subarray, and corresponding inverter carries out MPPT control to it.Have only a string cell panel to form as photovoltaic subarray 1, corresponding 2 pairs of photovoltaic subarrays of inverter 1 carry out MPPT control.This embodiment system is particularly suitable for the medium-capacity plant engineering, as power plant projects such as community, factories.
Embodiment three, and for another embodiment of photovoltaic inversion system provided by the invention, with reference to accompanying drawing 4, each photovoltaic subarray has only a cell panel to form in this embodiment system, and every cell panel is equipped with an inverter.Be made up of a cell panel 11 as photovoltaic subarray 1,12 pairs of cell panels of inverter 11 carry out MPPT control.This system is particularly suitable for the low capacity engineering, as family's engineering, and the BIPV engineering.
In a word, the above is embodiments of the invention only, is not to be used to limit protection scope of the present invention, but is used to illustrate the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. a method that improves photovoltaic inversion system whole efficiency is characterized in that the photovoltaic inversion system comprises plural at least photovoltaic subarray, inverter with MPPT function of each subarray configuration; Wherein the photovoltaic subarray is made up of the cell panel connection in series-parallel, and the piece number of series and parallel cell panel will be complementary with input voltage, the electric current of inverter, for guaranteeing influencing each other between the cell plate group string, need distinguish series diode on each cell panel string.
2. according to the method for the described raising photovoltaic inversion system whole efficiency of claim 1, it is characterized in that each photovoltaic subarray has only a string cell panel to be in series, inverter of each battery pack string configuration with MPPT function; This system is particularly suitable for the medium-capacity plant engineering, as the power plant project of community, factory.
3. according to the method for the described raising photovoltaic inversion system whole efficiency of claim 1, it is characterized in that each photovoltaic subarray has only a cell panel to constitute, inverter of every cell panel configuration with MPPT function; This system is particularly suitable for the low capacity engineering, as family's engineering, and the BIPV engineering.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100973021A CN102237690A (en) | 2010-12-30 | 2011-04-19 | Method for improving overall efficiency of photovoltaic inverter system |
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| CN201010613389.9 | 2010-12-30 | ||
| CN201010613389 | 2010-12-30 | ||
| CN2011100973021A CN102237690A (en) | 2010-12-30 | 2011-04-19 | Method for improving overall efficiency of photovoltaic inverter system |
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| CN102237690A true CN102237690A (en) | 2011-11-09 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684297A (en) * | 2012-05-16 | 2012-09-19 | 华为技术有限公司 | Solar power generating system and (N+1) backup power distribution control method thereof |
| CN104242401A (en) * | 2014-09-29 | 2014-12-24 | 云南中医学院 | Low-energy-consumption battery pack parallel device |
| CN105378577A (en) * | 2013-07-26 | 2016-03-02 | 京瓷株式会社 | Power conversion device, power management method, and power management system |
| CN105517653A (en) * | 2014-07-15 | 2016-04-20 | 阳光电源股份有限公司 | Centralized MPPT exiting and switching method and application thereof |
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| JP2004194500A (en) * | 2004-03-25 | 2004-07-08 | Sharp Corp | Power conversion apparatus for solar power generation |
| CN1933315A (en) * | 2005-07-27 | 2007-03-21 | 武藤健一 | Sun's rays generating device |
| CN201328089Y (en) * | 2008-09-28 | 2009-10-14 | 上海城建（集团）公司 | Multi-purpose solar power system |
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2011
- 2011-04-19 CN CN2011100973021A patent/CN102237690A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004194500A (en) * | 2004-03-25 | 2004-07-08 | Sharp Corp | Power conversion apparatus for solar power generation |
| CN1933315A (en) * | 2005-07-27 | 2007-03-21 | 武藤健一 | Sun's rays generating device |
| CN201328089Y (en) * | 2008-09-28 | 2009-10-14 | 上海城建（集团）公司 | Multi-purpose solar power system |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684297A (en) * | 2012-05-16 | 2012-09-19 | 华为技术有限公司 | Solar power generating system and (N+1) backup power distribution control method thereof |
| CN105378577A (en) * | 2013-07-26 | 2016-03-02 | 京瓷株式会社 | Power conversion device, power management method, and power management system |
| CN105378577B (en) * | 2013-07-26 | 2017-03-15 | 京瓷株式会社 | Power inverter, electric power management method and electric power coversion system |
| CN105517653A (en) * | 2014-07-15 | 2016-04-20 | 阳光电源股份有限公司 | Centralized MPPT exiting and switching method and application thereof |
| CN105517653B (en) * | 2014-07-15 | 2018-06-12 | 阳光电源股份有限公司 | A kind of MPPT hubbed modes exit, switching method and its related application |
| US10693297B2 (en) | 2014-07-15 | 2020-06-23 | Sungrow Power Supply Co., Ltd. | Centralized MPPT exiting and switching method and application thereof |
| CN104242401A (en) * | 2014-09-29 | 2014-12-24 | 云南中医学院 | Low-energy-consumption battery pack parallel device |
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Application publication date: 20111109 |