CN202772601U - Photovoltaic grid-connected inverter and photovoltaic power generation system - Google Patents
Photovoltaic grid-connected inverter and photovoltaic power generation system Download PDFInfo
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- CN202772601U CN202772601U CN2012204447561U CN201220444756U CN202772601U CN 202772601 U CN202772601 U CN 202772601U CN 2012204447561 U CN2012204447561 U CN 2012204447561U CN 201220444756 U CN201220444756 U CN 201220444756U CN 202772601 U CN202772601 U CN 202772601U
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 5
- 230000009466 transformation Effects 0.000 claims description 6
- 238000003491 array Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
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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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Abstract
本实用新型提供了一种光伏并网逆变器，包括多个输入端口、多个逆变单元组以及一个输出端口，其中每一逆变单元组包括第一逆变单元且该第一逆变单元包括用于实现电流变换的逆变组件及用于对光伏阵列的最大功率进行跟踪扫描的MPPT控制组件，每一逆变单元组的输入端分别连接到所述多个输入端口中的一个、输出端并联连接到输出端口，所述MPPT控制组件的输出端连接到逆变组件的控制端。本实用新型还提供了一种对应的光伏发电系统。本实用新型通过逆变器中并联的多组逆变单元分别连接一个独立的光伏阵列，使太阳能电池板故障仅影响该太阳能电池板所串联的那一路以及和它并联的太阳能电池板，而不会影响到整个光伏阵列。
The utility model provides a photovoltaic grid-connected inverter, which includes a plurality of input ports, a plurality of inverter unit groups and an output port, wherein each inverter unit group includes a first inverter unit and the first inverter unit The unit includes an inverter component for realizing current conversion and an MPPT control component for tracking and scanning the maximum power of the photovoltaic array, and the input end of each inverter unit group is respectively connected to one of the multiple input ports, The output terminals are connected to the output ports in parallel, and the output terminals of the MPPT control component are connected to the control terminals of the inverter component. The utility model also provides a corresponding photovoltaic power generation system. The utility model respectively connects an independent photovoltaic array through multiple sets of inverter units connected in parallel in the inverter, so that the failure of the solar battery panel only affects the path connected in series with the solar battery panel and the solar battery panel connected in parallel with it, not Will affect the entire photovoltaic array.
Description
Technical field
The utility model relates to the inverter field, more particularly, relates to a kind of photovoltaic combining inverter and photovoltaic generating system.
Background technology
Along with the day by day exhaustion of traditional energy and the awakening of environmental consciousness, the development and use of solar energy come into one's own day by day, and wherein photovoltaic generation is the major way that utilizes solar energy.In the large Capacity Optical photovoltaic generating system, usually the photovoltaic module of some need to be formed photovoltaic array by connection in series-parallel.The output electric energy of photovoltaic module and solar irradiance, assembly temperature are closely related, that is to say that there is a maximum power point in photovoltaic array, MPPT maximum power point tracking (Maximum Power Point Tracking, MPPT) is the scheme of obtaining above-mentioned maximum power point.By MPPT maximum power point tracking, can make all the time Maximum Power Output of battery component, thereby improve the utilance of solar module.
At present, what the photovoltaic inversion products adopted is that single MPPT follows the tracks of, and namely an inverter uses a solar panel array.Characteristic according to solar panel, if a certain cell panel breaks down in the array, one column voltage of then connecting with this fail battery plate will be on the low side, and the principle equal according to two point voltages in parallel, the voltage of the maximum power point that tracks by the MPPT technology can be on the maximum power point of that row cell panel that goes wrong, and can't track the solar panel of other normal operations of maximum power, so that inverter can't track the maximum power of whole photovoltaic array, with the fault extension, affect energy output and the benefit of photovoltaic system.
The utility model content
The technical problems to be solved in the utility model is that the problem for the whole photovoltaic generating system energy output of above-mentioned single solar panel fault effects and efficient provides a kind of photovoltaic combining inverter and photovoltaic generating system.
The technical scheme that the utility model solves the problems of the technologies described above is, a kind of photovoltaic combining inverter is provided, comprise a plurality of input ports, a plurality of inversion unit groups and an output port, wherein each inversion unit group comprises that the first inversion unit and this first inversion unit comprise for the inversion assembly of realizing current transformation and for the MPPT control assembly that the maximum power of photovoltaic array is carried out spotting scaming, the input of each inversion unit group is connected respectively in described a plurality of input port, output is parallel-connected to output port, and the output of described MPPT control assembly is connected to the control end of inversion assembly.
In photovoltaic combining inverter described in the utility model, each described inversion unit group is made of first inversion unit.
In photovoltaic combining inverter described in the utility model, at least one inversion unit group in described a plurality of inversion unit group comprises one or more the second inversion units with inversion assembly, and the inversion assembly in described the second inversion unit and the inversion assembly in the first inversion unit are connected in parallel and control end is connected to the output of the MPPT control assembly of the first inversion unit.
In photovoltaic combining inverter described in the utility model, each inversion unit group comprises that also at least one has the second inversion unit of inversion assembly, and the inversion assembly in described the second inversion unit and the inversion assembly in the first inversion unit are connected in parallel and control end is connected to the output of the MPPT control assembly of the first inversion unit.
The utility model also provides a kind of photovoltaic generating system, comprises photovoltaic array and an inverter, and wherein: described photovoltaic array comprises a plurality of independently photovoltaic subarrays; Described inverter comprises a plurality of input port of a photovoltaic subarray, a plurality of inversion unit group and output ports that are used for being connected to electrical network of being connected respectively to; Each inversion unit group comprises that the first inversion unit and this first inversion unit comprise for the inversion assembly of realizing current transformation and for the MPPT control assembly that the maximum power of photovoltaic array is carried out spotting scaming, the input of each inversion unit group is connected respectively in described a plurality of input port one, output and is parallel-connected to output port, and the output of described MPPT control assembly is connected to the control end of inversion assembly.
In photovoltaic generating system described in the utility model, each described inversion unit group is made of first inversion unit.
In photovoltaic generating system described in the utility model, at least one inversion unit group in described a plurality of inversion unit group comprises one or more the second inversion units with inversion assembly, and the inversion assembly in described the second inversion unit and the inversion assembly in the first inversion unit are connected in parallel and control end is connected to the output of the MPPT control assembly of the first inversion unit.
In photovoltaic generating system described in the utility model, each inversion unit group comprises that also at least one has the second inversion unit of inversion assembly, and the inversion assembly in described the second inversion unit and the inversion assembly in the first inversion unit are connected in parallel and control end is connected to the output of the MPPT control assembly of the first inversion unit.
Photovoltaic combining inverter of the present utility model and photovoltaic generating system have following beneficial effect: connect respectively an independently photovoltaic array by many groups inversion unit in parallel in the inverter, make the solar panel fault only affect that road that this solar panel connects and and the solar panel of its parallel connection, and can not have influence on whole photovoltaic array.
Description of drawings
Fig. 1 is the schematic diagram of the utility model photovoltaic combining inverter embodiment.
Fig. 2 is the schematic diagram of inversion unit group the first embodiment among Fig. 1.
Fig. 3 is the schematic diagram of inversion unit group the second embodiment among Fig. 1.
Fig. 4 is the schematic diagram of the utility model photovoltaic generating system embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
As shown in Figure 1, be the schematic diagram of photovoltaic combining inverter embodiment of the present utility model.In the present embodiment, inverter 10 comprises a plurality of input ports 11, a plurality of inversion unit group 12 and an output port 13.Above-mentioned each input port 11 is used for connecting the input of one road direct current, photovoltaic array (solar panel array) for example, and output port 13 is used for connecting electrical network.The input of above-mentioned each inversion unit group 12 is connected respectively in a plurality of input ports 11 one, output and is parallel-connected to output port 13.
As shown in Figure 2, be the schematic diagram of inversion unit group 12 among Fig. 1.This inversion unit group 12 comprises that first inversion unit 121 and this first inversion unit 121 comprise a MPPT control assembly 1211 and an inversion assembly 1212, and the output of above-mentioned MPPT control assembly 1211 is connected to the control end of inversion assembly 1212.Inversion assembly 1212 is used for realizing that direct current to the conversion of alternating current, specifically can comprise IGBT element constant power assembly.MPPT control assembly 1211 is used for the maximum power of photovoltaic array (this photovoltaic array is connected to corresponding input port 11) is carried out spotting scaming, thereby carries out current conversion according to maximal power tracing output control inversion assembly 1212.
When specific implementation, above-mentioned MPPT control assembly 1211 can be the IC of operation specific program in the first inversion unit 121.
As shown in Figure 3, be the schematic diagram of inversion unit group 12 second embodiment among Fig. 1.In this inversion unit group 12, comprise first inversion unit 121 ' and second inversion unit 122 ', wherein the first inversion unit 121 ' comprises that MPPT control assembly 1211 ' and inversion assembly the 1212 ', the second inversion unit 122 ' only comprise inversion assembly 1221 '.Inversion assembly 1221 ' in above-mentioned the second inversion unit 122 ' and the inversion assembly 1212 ' in the first inversion unit 121 ' are connected in parallel, and the control end of above-mentioned inversion assembly 1221 ' and inversion assembly 1212 ' is connected respectively to the output of MPPT control assembly 1211 ', thereby realizes current transformation by this MPPT control assembly 1211 ' control.
The inversion unit group that above-mentioned Fig. 2 is connected with Fig. 3 can realize by different connections and configuration parameter.
In the embodiment shown in fig. 1, a plurality of inversion unit groups 12 of inverter 10 can all be the inversion unit group shown in Fig. 2, and dereliction independently carries out maximum power point tracking from pattern and each inversion unit 121 between each first inversion unit 121; Can all be the inversion unit group shown in Fig. 3 also, adopt master slave mode between the first inversion unit 121 ' in each inversion unit group and the second inversion unit 122 '; Perhaps comprise simultaneously the inversion unit group shown in Fig. 2 and Fig. 3, thereby satisfy different application scenarios.
Above-mentioned inverter 10 can allow the solar panel fault only affect that road that this cell panel connects and and the cell panel of its parallel connection, and can not have influence on whole photovoltaic array, have influence on the problem of whole photovoltaic array thereby avoid single cell panel to go wrong.
As shown in Figure 4, be the schematic diagram of the utility model photovoltaic generating system embodiment.In the present embodiment, photovoltaic generating system comprises photovoltaic array and an inverter 10, wherein photovoltaic array comprises a plurality of independently photovoltaic subarrays 51, and inverter 40 comprises a plurality of input port 41 of a photovoltaic subarray 51, a plurality of inversion unit group 42 and output ports 43 that are connected to electrical network of being connected respectively to.The input of above-mentioned each inversion unit group 42 is connected respectively in a plurality of input ports 41 one, output and is parallel-connected to output port 43.
In above-mentioned photovoltaic generating system, each inversion unit group 42 is used for realizing curent change, and comprise that the first inversion unit and this first inversion unit comprise that wherein the output of MPPT control assembly is connected to the control end of inversion assembly for the inversion assembly of realizing current transformation and for the MPPT control assembly that the maximum power of photovoltaic array is carried out spotting scaming.
In above-mentioned photovoltaic generating system, all inversion unit groups 42 can only comprise the first inversion unit, and namely a plurality of the first inversion units all have one tunnel independently direct current input by an input port, and each first inversion unit independently carries out maximum power point tracking.
In order to satisfy the demand of configuration relatively high power photovoltaic array, each inversion unit group 42 can comprise first inversion unit and at least one second inversion unit, wherein above-mentioned the first inversion unit and the second inversion unit are connected in parallel, and the first inversion unit in the same inversion unit group 42 and the second inversion unit adopt master slave mode, control the second inversion unit by the first inversion unit generation control signal and carry out current transformation.
In addition, in some applications, above-mentioned dual mode can be mixed and use, namely both comprise the inversion unit group that only has the first inversion unit in the inversion unit group, also comprise the inversion unit group that has simultaneously the first inversion unit and the second inversion unit.
In the above-described embodiments, a large photovoltaic array is divided into a plurality of relatively independent little photovoltaic subarrays, between do not contact mutually, so when some cell panels break down, impact is only at the photovoltaic subarray at this piece cell panel place, and can not affect the work of other subarrays, thereby impact is dropped to minimum.
The above; it only is the better embodiment of the utility model; but protection range of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of claim.
Claims (8)
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| CN2012204447561U CN202772601U (en) | 2012-09-03 | 2012-09-03 | Photovoltaic grid-connected inverter and photovoltaic power generation system |
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| CN2012204447561U CN202772601U (en) | 2012-09-03 | 2012-09-03 | Photovoltaic grid-connected inverter and photovoltaic power generation system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490446A (en) * | 2013-09-24 | 2014-01-01 | 许继集团有限公司 | Operational control method for photovoltaic inverter |
| CN103795078A (en) * | 2013-09-12 | 2014-05-14 | 苏州市龙源电力科技股份有限公司 | Household photovoltaic grid-connected power generation system |
| CN104883085A (en) * | 2015-06-08 | 2015-09-02 | 阳光电源股份有限公司 | Photovoltaic inverter having a plurality of MPPT units |
| CN110739717A (en) * | 2018-07-19 | 2020-01-31 | 阳光电源股份有限公司 | kinds of intelligent photovoltaic modules and application system thereof |
| US11811217B2 (en) | 2021-01-19 | 2023-11-07 | Huawei Digital Power Technologies Co., Ltd. | Fault protection apparatus and photovoltaic power generation system |
-
2012
- 2012-09-03 CN CN2012204447561U patent/CN202772601U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103795078A (en) * | 2013-09-12 | 2014-05-14 | 苏州市龙源电力科技股份有限公司 | Household photovoltaic grid-connected power generation system |
| CN103490446A (en) * | 2013-09-24 | 2014-01-01 | 许继集团有限公司 | Operational control method for photovoltaic inverter |
| CN104883085A (en) * | 2015-06-08 | 2015-09-02 | 阳光电源股份有限公司 | Photovoltaic inverter having a plurality of MPPT units |
| CN104883085B (en) * | 2015-06-08 | 2018-04-10 | 阳光电源股份有限公司 | A kind of photovoltaic DC-to-AC converter with multiple MPPT units |
| CN110739717A (en) * | 2018-07-19 | 2020-01-31 | 阳光电源股份有限公司 | kinds of intelligent photovoltaic modules and application system thereof |
| US11811217B2 (en) | 2021-01-19 | 2023-11-07 | Huawei Digital Power Technologies Co., Ltd. | Fault protection apparatus and photovoltaic power generation system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
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Effective date of registration: 20160217 Address after: Shenzhen City, Guangdong province Baoan 518101 District 70 Liu Xian Road two Hongwei Industrial Park building E building 1-3 Patentee after: Shenzhen Inovance Technology Co., Ltd. Patentee after: Suzhou Huichuan Technology Co.,Ltd. Address before: 518101 Guangdong city of Shenzhen province Baoan District no 70 District Liu Xian two road Hongwei Dong Industrial Zone E Patentee before: Shenzhen Inovance Technology Co., Ltd. Patentee before: Suzhou Huichuan Technology Co.,Ltd. Patentee before: Suzhou Monarch Control Technology Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130306 Termination date: 20190903 |