CN105119321A - System capable of increasing generating capacity of photovoltaic power generation system - Google Patents
System capable of increasing generating capacity of photovoltaic power generation system Download PDFInfo
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- CN105119321A CN105119321A CN201510632002.7A CN201510632002A CN105119321A CN 105119321 A CN105119321 A CN 105119321A CN 201510632002 A CN201510632002 A CN 201510632002A CN 105119321 A CN105119321 A CN 105119321A
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- Prior art keywords
- inverter
- contactor
- photovoltaic
- photovoltaic array
- generating system
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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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- Supply And Distribution Of Alternating Current (AREA)
- Inverter Devices (AREA)
Abstract
A system capable of increasing the generating capacity of a photovoltaic power generation system is characterized in that two branches are connected in parallel between a photovoltaic array and an inverter, wherein the branch a is formed by the photovoltaic array, a direct current contactor A and the inverter, and the branch b is formed by the photovoltaic array, a direct current contactor B, a pumping circuit or a chopper inverter transformer and the inverter. The other branch is added between the photovoltaic array and the inverter, and the pumping circuit is added in the branch, so that the output voltage of the photovoltaic array rises to reach the normal working voltage of the inverter, thus enabling the inverter and the whole power generation system to continuously realize grid-connected power generation, and increasing the generating capacity of the photovoltaic power generation system.
Description
Technical field
The present invention relates to a kind of solar photovoltaic generation system, especially a kind of photovoltaic generating system that can improve energy output.
Background technology
The electricity generation system be made up of photovoltaic array and inverter, when normal solar irradiation, the output voltage of photovoltaic array is enough to the operating voltage reaching inverter, and system can normally be generated electricity by way of merging two or more grid systems; But when solar irradiation is too low, the output voltage of photovoltaic array does not reach the operating voltage range of inverter, and system can not normally start, depart from electrical network, electricity at this time is just referred to as " rubbish electricity ".
In order to collect the energy output of this part, and make full use of, the present invention increases the branch road that a band pump rises circuit (or copped wave contravariant transformer) in original system-based, the output voltage of photovoltaic array is raised, reach the normal working voltage of inverter input terminal, thus make inverter and whole electricity generation system continue to generate electricity by way of merging two or more grid systems, increase energy output.
Through retrieval, in the patent documentation of existing photovoltaic generating system, the pertinent literature report of also not identical with the present invention improved photovoltaic generating system energy output.
Summary of the invention
The object of this invention is to provide a kind of system improving solar photovoltaic generation system energy output, this system is on the basis of traditional photovoltaic generating system, between photovoltaic array and inverter, increase the branch road that a band pump rises circuit (or copped wave contravariant transformer), " rubbish electricity " voltage is increased to inverter input terminal operating voltage, improves energy output.
The object of the invention is to realize by the following method:
A kind of system improving photovoltaic generating system energy output, it comprises: photovoltaic array, D.C. contactor A, inverter, D.C. contactor B, it is characterized in that: two branch roads in parallel between photovoltaic array with inverter, branch road a is in series by photovoltaic array, D.C. contactor A, inverter; Branch road b rises circuit or copped wave contravariant transformer by photovoltaic array, D.C. contactor B, pump, inverter is in series.
The present invention by increasing another one branch road between photovoltaic array and inverter, in branch road, increase a pump rise circuit, the output voltage of photovoltaic array is raised, reach the normal working voltage of inverter, thus make inverter and whole electricity generation system continue to generate electricity by way of merging two or more grid systems, improve the energy output of photovoltaic generating system.
Accompanying drawing explanation
Fig. 1 is embodiments of the invention schematic diagram.
Shown in figure: 1-photovoltaic array, 2-D.C. contactor A, 3-inverter, 4-D.C. contactor B, 5-pump rises circuit or copped wave contravariant transformer.
Embodiment
Below in conjunction with accompanying drawing 1 embodiment, the present invention is described in more detail:
A kind of system improving photovoltaic generating system energy output, it comprises: 1-photovoltaic array, 2-D.C. contactor A, 3-inverter, 4-D.C. contactor B, 5-pump rises circuit (or copped wave contravariant transformer), it is characterized by: two branch roads in parallel between photovoltaic array with inverter, branch road a is by photovoltaic array, D.C. contactor A, inverter is in series; Branch road b is by photovoltaic array, and D.C. contactor B, pump rises circuit (or copped wave contravariant transformer), and inverter is in series.
A). when solar irradiation is normal, when the voltage that photovoltaic array sends reaches the operating voltage range of inverter, photovoltaic generating system starts A contactor, starts inverter, realize generating electricity by way of merging two or more grid systems according to normal route a.
B). when solar irradiation is too low, the output voltage of photovoltaic array is low, fails to reach the normal starting resistor of inverter.Electricity generation system can not be grid-connected, and some electrical power at this time wastes.This device is by detecting inverter input voltage, when brownout, stop contactor A, start B contactor, the voltage of photovoltaic array rises after circuit boosts and reach inverter normal input voltage through pump, inverter is started from b path, between photovoltaic array and inverter, increase pump rise circuit (or copped wave contravariant transformer), the voltage of input inverter is raised, reaches the starting resistor scope of controller, inverter, start photovoltaic generating system generating, thus improve the energy output of whole system.
C). when solar irradiation slowly recovers normal, the voltage being arrived inverter by b path is raised gradually, and when reaching certain voltage value, close contactor B, starting contactor a path, photovoltaic generating system is according to normal route work.
D). contactor A and contactor B is interlocking contact device.
E). the capacity that pump rises circuit is less than 1/2 of inverter capacity.
F). the inverter efficiency value that traditional band pump rises be μ-
- 1× μ
2, the present invention under normal circumstances efficiency value is μ
1, when irradiance is too low, efficiency value be just μ-
- 1× μ
2, compare the inverter that conventional belt pump rises, the present invention has higher efficiency and advantage of lower cost.
Claims (7)
1. one kind can be improved the system of photovoltaic generating system energy output, it comprises: photovoltaic array (1), D.C. contactor A (2), inverter (3), D.C. contactor B (4), it is characterized in that: two branch roads in parallel between photovoltaic array (1) with inverter (3), branch road a is in series by photovoltaic array (1), D.C. contactor A (2), inverter (3); Branch road b rises circuit or copped wave contravariant transformer (5) by photovoltaic array (1), D.C. contactor B (4), pump, inverter (3) is in series.
2. a kind of system improving photovoltaic generating system energy output according to claim 1, it is characterized in that: when solar irradiance is normal, the output voltage of photovoltaic array reaches inverter working range, photovoltaic generating system starts D.C. contactor A, start inverter according to normal route D.C. contactor A, realize generating electricity by way of merging two or more grid systems.
3. a kind of system improving photovoltaic generating system energy output according to claim 1, it is characterized in that: when solar irradiance is too low, the output voltage of photovoltaic array fails to reach inverter working range, can not normally generate electricity by way of merging two or more grid systems, photovoltaic generating system stops D.C. contactor A, start D.C. contactor B, now photovoltaic array " rubbish electricity " that sends to rise after circuit or copped wave after contravariant transformer rising by the pump of b branch road, reach controller, the normal range of operation of inverter, photovoltaic system is generated electricity by way of merging two or more grid systems, thus improve the generating efficiency of whole electricity generation system.
4. a kind of system improving photovoltaic generating system energy output according to claim 1, it is characterized in that: when solar irradiance is slowly recovered normal, when being elevated to certain magnitude of voltage by the voltage of B branch road, system will close D.C. contactor B, start D.C. contactor A, photovoltaic generating system is according to normal work path work.
5. a kind of system improving photovoltaic generating system energy output according to claim 1, is characterized in that: D.C. contactor A and D.C. contactor B is interlocking contact device.
6. a kind of system improving photovoltaic generating system energy output according to claim 1, is characterized in that: the capacity that pump rises circuit is less than 1/2 of inverter capacity.
7. a kind of system improving photovoltaic generating system energy output according to claim 1, is characterized in that: the inverter efficiency value that band pump rises is μ
1, when irradiance is too low, efficiency value be just μ-
- 1× μ
2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510632002.7A CN105119321A (en) | 2015-09-29 | 2015-09-29 | System capable of increasing generating capacity of photovoltaic power generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510632002.7A CN105119321A (en) | 2015-09-29 | 2015-09-29 | System capable of increasing generating capacity of photovoltaic power generation system |
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| CN105119321A true CN105119321A (en) | 2015-12-02 |
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| CN201510632002.7A Pending CN105119321A (en) | 2015-09-29 | 2015-09-29 | System capable of increasing generating capacity of photovoltaic power generation system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101128975A (en) * | 2005-02-25 | 2008-02-20 | 三菱电机株式会社 | Power conversion apparatus |
| CN103457511A (en) * | 2012-05-29 | 2013-12-18 | Ls产电株式会社 | Apparatus for photovoltaic power generation and method thereof |
| WO2014179365A1 (en) * | 2013-04-29 | 2014-11-06 | Ideal Power, Inc. | Systems and methods for uninterruptible power supplies with bidirectional power converters |
| CN104201713A (en) * | 2014-08-21 | 2014-12-10 | 山亿新能源股份有限公司 | Potential induced degradation resistance circuit for multi-machine parallel connection photovoltaic power generation system and pressure regulating device |
| CN104348181A (en) * | 2013-07-26 | 2015-02-11 | 国电新能源技术研究院 | Highly efficient photovoltaic distributed power generation system |
| CN205565746U (en) * | 2015-09-29 | 2016-09-07 | 广西比迪光电科技工程有限责任公司 | System for can improve photovoltaic power generation system generated energy |
-
2015
- 2015-09-29 CN CN201510632002.7A patent/CN105119321A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101128975A (en) * | 2005-02-25 | 2008-02-20 | 三菱电机株式会社 | Power conversion apparatus |
| CN103457511A (en) * | 2012-05-29 | 2013-12-18 | Ls产电株式会社 | Apparatus for photovoltaic power generation and method thereof |
| WO2014179365A1 (en) * | 2013-04-29 | 2014-11-06 | Ideal Power, Inc. | Systems and methods for uninterruptible power supplies with bidirectional power converters |
| CN104348181A (en) * | 2013-07-26 | 2015-02-11 | 国电新能源技术研究院 | Highly efficient photovoltaic distributed power generation system |
| CN104201713A (en) * | 2014-08-21 | 2014-12-10 | 山亿新能源股份有限公司 | Potential induced degradation resistance circuit for multi-machine parallel connection photovoltaic power generation system and pressure regulating device |
| CN205565746U (en) * | 2015-09-29 | 2016-09-07 | 广西比迪光电科技工程有限责任公司 | System for can improve photovoltaic power generation system generated energy |
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