CN202282746U - Solar cell assemblies and photovoltaic system - Google Patents
Solar cell assemblies and photovoltaic system Download PDFInfo
- Publication number
- CN202282746U CN202282746U CN2011203783556U CN201120378355U CN202282746U CN 202282746 U CN202282746 U CN 202282746U CN 2011203783556 U CN2011203783556 U CN 2011203783556U CN 201120378355 U CN201120378355 U CN 201120378355U CN 202282746 U CN202282746 U CN 202282746U
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- Prior art keywords
- solar cell
- cell assemblies
- photovoltaic
- miniature
- inverter
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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
Abstract
The utility model discloses solar cell assemblies of which the outputs are alternating currents. The output ends of the solar cell assemblies are connected with a power grid directly, not only simplifying the wirings between the solar cell assemblies, but also improving the system reliability and efficiency substantially. The technical scheme of the utility model is that the solar cell assemblies comprise laminated members packaged in aluminum alloy frames, and each laminated member is composed of an ultra-white low-iron tempered glass, a first EVA layer, a solar cell, a second EVA layer and a backplane arranged from top to bottom; the backsides of the laminated members are equipped with miniature inverters, the DC output ends of the laminated members are in electrical connections with the miniature inverters, and each miniature inverter is equipped with an AC output end. The utility model also provides a photovoltaic system which enables the system security and stability to be improved and the installation cost to be reduced. The photovoltaic system is formed by making the above plurality of solar cell assemblies in parallel connections, and the AC output end of each miniature inverter is connected with the power grid directly.
Description
Technical field
The utility model relates to field of photovoltaic power generation, the photovoltaic generating system that relates in particular to a kind of solar module and be made up of this battery component.
Background technology
In recent years, solar energy has received increasing concern as a kind of cleaning, green renewable new forms of energy, and its application is also very extensive.In the various application of solar energy, a most important application at present is exactly a photovoltaic generation, and along with the attention of various countries to solar power generation, photovoltaic generation shared ratio in the whole generating system is increasing.
Solar photovoltaic generation system can be divided into independent (from net) photovoltaic generating system and grid-connected photovoltaic power generation system two big classes on big type.The independent photovoltaic system mainly forms by solar module, controller, storage battery and from the net inverter, and in this system, assembly is directly changed into electric energy with solar energy, and pass through controller power storage in storage battery.When the load electricity consumption, electricity of accumulator reasonably is assigned in each load through controller.Grid-connected photovoltaic power generation system mainly is made up of photovoltaic arrays and combining inverter; In this system; Solar module is that direct current gets into combining inverter after the direct current header box confluxes with solar energy converting, and combining inverter directly inserts public electric wire net after converting thereof into the alternating current that meets the electrical network requirement.Independent photovoltaic generating system has been owing to used the such energy storage device of storage battery, thereby just current cost and the maintenance cost in later stage are very high; And grid-connected photovoltaic power generation system is owing to directly insert public electric wire net with alternating current, and cost is then much lower relatively, will be following mainstream development direction.
Fig. 4 has the grid-connected photovoltaic system schematic of centralized inverter for prior art; The widely used pattern of this kind system is with the series connection earlier of plurality of solar cells assembly at present; Again the parallel connection of battery component tandem is formed assembly array 201; After photovoltaic DC header box 202 confluxes, insert DC power distribution cabinet 203, and then insert centralized combining inverter 204, after AC power distribution cabinet/AC distribution panel 205 is connected to the grid 206 after boosting.Used a centralized combining inverter in this grid-connected system, thereby the total cost of system is low, power output can reach MW class, but it also has significant disadvantages.The most outstanding is integrity problem, if centralized inverter breaks down, before this inverter is fixed or changed, the energy that all panels produce can not be utilized so.Therefore, when shield light photovoltaic array such as local shade or broken gravel was arranged in the assembly, if having because of the unequal module that causes power output to descend of sunshine inequality and characteristic, whole power output will significantly reduce.If any certain battery in the series connection breaks down, also can cause whole battery group to lose efficacy.Although existing technology can be added the interface box of a photovoltaic array on centralized inverter; Photovoltaic module to each string is monitored; As wherein there is one group of string work undesired; System will pass to this information on the remote controllers, simultaneously can be through Long-distance Control with this a string quitting work, thus the work that can not reduce and influence whole photovoltaic system because of the fault of a string photovoltaic string is exported with energy; But this mode can increase the cost of system on the one hand, also can cause the power loss of a photovoltaic group string on the other hand.For specific solar radiation, temperature and battery types, solar energy photovoltaic system all should have unique optimum voltage and electric current mutually, thereby makes photovoltaic system produce maximum energy.If photovoltaic system moves under non-optimum voltage and levels of current, the efficient of system is just very low, and for example to depart from maximum power point more in system, might cause the power of system to have only the half the of maximum power point output at last.
The utility model content
The utility model technical problem to be solved is to provide a kind of solar module; This assembly is output as alternating current; Its output can be directly connected on the electrical network, has not only simplified the wiring between the assembly, and the reliability of system and efficient are significantly promoted.
For this reason; The technical scheme that the utility model proposes is: a kind of solar module; Comprise the laminate that is packaged in the aluminum alloy frame; Said laminate is made up of the low iron toughened glass of the ultrawhite of arranging from top to bottom, an EVA layer, solar battery sheet, the 2nd EVA layer and backboard, it is characterized in that:
The back side of said laminate is provided with miniature inverter, and the dc output end of laminate and miniature inverter electrically connect, and said miniature inverter is provided with an ac output end.
The utility model another technical problem to be solved provides a kind of photovoltaic generating system, makes the fail safe of system and stability be improved, and has reduced installation cost.
The technical scheme that solves this technical problem is that a kind of photovoltaic generating system is characterized in that: it is made up of a plurality of above-mentioned solar module parallel connections, and the ac output end of each miniature inverter all directly is connected with electrical network.
The solar module of the utility model and the photovoltaic generating system of composition thereof; Comparing with existing assembly and photovoltaic system has many tangible advantages: because every solar module is equipped with independent miniature inverter; The system that makes can adapt to the load and the weather condition of continuous variation, thereby can optimal conversion efficiency be provided for monolithic element and whole system.The reliability of system is also very high in addition, even certain miniature inverter breaks down, also only can have influence on the normal output of this corresponding piece solar module, and other part of system equally can operate as normal.But miniature inverter framework is simplified wiring also, has saved direct current component wiring, fuse, overcurrent protective device and photovoltaic header box, and this also just means lower installation cost.Solar power system through making the consumer is more efficient, and system regains and adopts the required time of initial capitalization of heliotechnics to shorten.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
Fig. 1 is the structural representation of the utility model solar module;
Fig. 2 is the schematic rear view of the utility model solar module;
Fig. 3 is the principle schematic of the utility model photovoltaic generating system;
Fig. 4 is the grid-connected photovoltaic system schematic of prior art band centralized inverter;
Embodiment:
For further understanding the technical characterictic and the content of the utility model patent, combine accompanying drawing that the detailed technology of this patent is described below at present:
Extremely shown in Figure 3 like Fig. 1; A kind of solar module; Comprise the laminate 100 that is packaged in the aluminum alloy frame 105; Said laminate 100 is made up of with backboard 104 the low iron toughened glass of the ultrawhite of arranging from top to bottom 101, an EVA layer 102, solar battery sheet 103, the 2nd EVA layer 102 ', it is characterized in that:
The back side of said laminate (100) is provided with miniature inverter 106, and the dc output end of laminate 100 and miniature inverter 106 electrically connect, and said miniature inverter 106 is provided with an ac output end 107.
Miniature inverter effect is that the dc inverter that the monolithic solar module is produced is to meet the alternating current that electrical network requires; Its circuit comprises main circuit and control circuit two parts; Wherein main circuit is mainly accomplished conversion and the inversion process of DC-DC-AC; The control procedure that then completion system of control circuit is incorporated into the power networks; Comprise that assembly MPPT maximum power point tracking (MPPT), electrical network, phase place detect in real time, current phase FEEDBACK CONTROL and Sine Wave Pulse Width Modulation signal generation in real time etc. because the concrete composition of main circuit and control circuit is prior art, thereby discuss no longer in detail at this.
Fig. 3 is a kind of photovoltaic generating system; This system is made up of the solar module parallel connection that a plurality of above-mentioned a plurality of bands exchange output; The ac output end 107 of the miniature inverter of all component directly is parallel-connected to electrical network 108, and the ac output end 107 of each miniature inverter 106 all directly is connected with electrical network 108.System's electricity directly is connected to the grid.
The polycrystalline solar module that exchanges output with a band is an example; The polycrystal silicon cell sheet that assembly is 156mm * 156mm by 60 specifications is in series, and its peak power output voltage (Vmp) is about 30V, and the miniature inverter MPPT maximum power point tracking voltage range that this assembly is equipped with is 20V～40V; Specified output AC voltage is 220V; The Vmp of assembly just in time is positioned at this scope, and therefore no matter under what weather condition, miniature inverter can both be realized the maximum output of component power.
A kind of solar module of the utility model and the photovoltaic generating system of composition thereof; Because every solar module attaches independent miniature inverter is arranged; The MPPT function of miniature inverter makes assembly no matter under which kind of weather condition, all be operated in maximum power point, and whole system also can reach best conversion efficiency.Every in addition block assembly is parallel to electrical network respectively; Will be independent of each other between the assembly; This has also strengthened the reliability of this system greatly; Even certain block assembly or certain miniature inverter break down in the system, also only can have influence on the normal output of this corresponding piece solar module, other part of system equally can operate as normal.Than the grid-connected system that uses centralized inverter; The grid-connected photovoltaic power generation system that band exchanges the solar module composition of output will save direct current component wiring, fuse, overcurrent protective device and photovoltaic header box, and this also just means lower installation cost.
Claims (2)
1. solar module; Comprise the laminate (100) that is packaged in the aluminum alloy frame (105); Said laminate (100) is made up of the low iron toughened glass (101) of the ultrawhite of arranging from top to bottom, an EVA layer (102), solar battery sheet (103), the 2nd EVA layer (102 ') and backboard (104), it is characterized in that:
The back side of said laminate (100) is provided with miniature inverter (106), and the dc output end of laminate (100) and miniature inverter (106) electrically connect, and said miniature inverter (106) is provided with an ac output end (107).
2. photovoltaic generating system, it is characterized in that: it is made up of the described solar module parallel connection of a plurality of claims 1, and the ac output end (107) of each miniature inverter (106) all directly is connected with electrical network (108).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203783556U CN202282746U (en) | 2011-09-29 | 2011-09-29 | Solar cell assemblies and photovoltaic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203783556U CN202282746U (en) | 2011-09-29 | 2011-09-29 | Solar cell assemblies and photovoltaic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202282746U true CN202282746U (en) | 2012-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203783556U Expired - Fee Related CN202282746U (en) | 2011-09-29 | 2011-09-29 | Solar cell assemblies and photovoltaic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202282746U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102723732A (en) * | 2012-06-21 | 2012-10-10 | 上海市电力公司 | Distribution type photovoltaic grid-connected power generation system |
| CN103887356A (en) * | 2014-04-14 | 2014-06-25 | 江苏宇兆能源科技有限公司 | Light solar photovoltaic power generation component and stacking method in production technology thereof |
| CN104009536A (en) * | 2014-06-12 | 2014-08-27 | 鞍钢股份有限公司 | Solar power generation standby power source |
-
2011
- 2011-09-29 CN CN2011203783556U patent/CN202282746U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102723732A (en) * | 2012-06-21 | 2012-10-10 | 上海市电力公司 | Distribution type photovoltaic grid-connected power generation system |
| CN103887356A (en) * | 2014-04-14 | 2014-06-25 | 江苏宇兆能源科技有限公司 | Light solar photovoltaic power generation component and stacking method in production technology thereof |
| CN104009536A (en) * | 2014-06-12 | 2014-08-27 | 鞍钢股份有限公司 | Solar power generation standby power source |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120620 Termination date: 20120929 |