CN102044988A - Solar electric generating system for decentralized execution of maximum power point tracking and solar battery thereof - Google Patents
Solar electric generating system for decentralized execution of maximum power point tracking and solar battery thereof Download PDFInfo
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- CN102044988A CN102044988A CN2009101803196A CN200910180319A CN102044988A CN 102044988 A CN102044988 A CN 102044988A CN 2009101803196 A CN2009101803196 A CN 2009101803196A CN 200910180319 A CN200910180319 A CN 200910180319A CN 102044988 A CN102044988 A CN 102044988A
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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
Abstract
The invention provides a solar electric generating system for decentralized execution of maximum power point tracking and a solar battery thereof, wherein the solar battery is composed of a solar wafer and a maximum power point tracking unit, the direct current power supply generated by the solar wafer by means of photovoltaic effect is output to the maximum power point tracking unit to execute the purpose of maximum power point tracking; furthermore, the output end of the solar battery is connected to other solar batteries in serial, in parallel or in serial and parallel via a capacitor so as to form a solar battery module which is capable of outputting a voltage, and the output end of the solar battery module is further connected to a voltage converter or a transmission unit to form a solar electric generating system. The solar electric generating system for decentralized execution of maximum power point tracking and the solar battery thereof provided by the invention have the advantages that the electric power obtained by the system is the maximum power due to the solar electric generating system is used for executing the maximum power point tracking in relation to each solar battery, and the problem that the whole maximum output power of the solar electric generating system is reduced due to the maximum power of each solar battery cannot be obtained effectively by means of the conventional centralized execution method of the maximum power point tracking via an inverter is solved.
Description
Technical field
The invention relates to a kind of solar power system and solar cell thereof, refer to a kind of solar power system and solar cell thereof that disperses to carry out maximum power tracing especially.
Background technology
Because the petering out of natural energy resources makes the mankind have to actively seek available alternative energy source, and inexhaustible, nexhaustible solar energy, become the rising star of alternative energy source.About the utilization of solar energy, mode in vogue at present is to utilize solar cell that conversion of solar energy is electric energy, and its principle please cooperate the following stated:
The structure of existing solar cell (comprising monocrystalline silicon battery, polycrystal silicon cell, amorphous silicon membrane battery, copper indium diselenide/copper indium diselenide battery, cadmium telluride battery, GaAs battery and other kind batteries etc.) mainly is to utilize manufacture of semiconductor to form a bottom electrode 71, a photoconductive semiconductor layer 72, an antireflection film 73 and a top electrode 74 in regular turn in a substrate 70 roughly as shown in Figure 3; With the monocrystalline silicon battery is example, and this photoconductive semiconductor layer 72 comprises a p type semiconductor layer 721 and a n type semiconductor layer 722, and constitutes a P-N semiconductor junction at the two.When light projects this P-N semiconductor junction, to form the light stress effect (PHOTO VOLTAOR EFFECT) that electrifies, and make its photoconductive semiconductor layer 72 generation electronics electricity holes right, this electronics electricity hole will be to making electronics toward n type semiconductor layer 722 side shiftings because of diffusion and internal electric field, the electricity hole is then toward p type semiconductor layer 721 side shiftings, at last upper and lower electrode 71,74 output DCs by electrically connecting with n type semiconductor layer 722 and p type semiconductor layer 721 respectively.
Because each solar cell can only be exported the very direct current of low pressure, therefore on typical practice, be that most solar cells are assembled into a solar module, then most solar modules are assembled into a sub-solar battery array (sub-array), are assembled into a solar battery array by the sub-solar battery array of majority again; Wherein, this solar module is by distribution each solar cell to be interconnected, and then utilizes inverter that the DC power supply of solar battery array output is converted to form of communication, and carries out maximum power tracing (MPPT).
When yet solar battery array is accepted sunshine, can because shade, cover, factors such as daylight incident angle or a certain solar cell damage, cause the electric power that each solar cell produces in the array also inequality, when the energy output with all solar cells carried out maximum power tracing, the maximum power that can't effectively obtain each solar cell consequently caused the reduction of the total peak power output of system.
Summary of the invention
Therefore, main purpose of the present invention is providing a kind of solar power system that disperses to carry out maximum power tracing.
For reaching major technique means that aforementioned purpose takes is to make aforementioned solar power system comprise that more than one solar module and is located at the conversion transmission unit of solar module output; Wherein: each solar module is made up of a plurality of solar cells, and each solar cell comprises:
One solar wafer has a direct current power output end;
One maximum power tracing unit has a power input and a power output end, and this power input is to be connected with the dc power output end of aforementioned solar wafer;
One electric capacity is that cross-over connection is on the power output end of maximum power tracing unit, when being connected with other solar cells for solar cell, as the usefulness of energy balance or energy compensating;
Thus, the power output end of this solar module is to interconnect institute by each solar cell output by electric capacity to constitute, and the power supply of this solar module output is then changed by the conversion transmission unit or transmitted; Because each solar cell is to carry out maximum power tracing separately in the solar module, the electric power that therefore is sent to the conversion transmission unit is actual maximum power performance, thus the effective overall operation efficient of elevator system; Because traditional solar power system is that maximum power tracing is carried out in the total output at all solar cells on inverter, but because of the variation that relates to the angle at sunshine or solar cell itself such as may damage at factor, so inverter can't really be obtained the maximum power of each solar cell when carrying out maximum power tracing, under this situation, may underestimate actual power performance, and reduce the running efficiency of system; Compare with traditional solar power system, the present invention disperses to carry out maximum power tracing separately by each solar cell, thereby can guarantee that system's gained electric power is the actual maximum power that gets, thereby can effectively solve traditional solar power system because of the low problem of running efficiency due to the maximum power tracing.
Another object of the present invention is at the solar cell that a kind of tool maximum power tracing function is provided, and this solar cell comprises:
One substrate;
One microelectronic circuit layer is to be formed on the aforementioned substrates, in order to constitute a maximum power tracing unit;
One bottom electrode is to be formed on the aforementioned microelectronic circuit layer, and constitutes with the power input of maximum power tracing unit and to electrically connect;
One photoconductive semiconductor layer is to be formed on the aforementioned bottom electrode, has a downside and a upside, and its downside is adjacent with bottom electrode and constitutes electric connection;
One antireflection film is the upside that is formed at photoconductive semiconductor layer;
One top electrode is to be formed on the antireflection film, and constitutes with the upside of photoconductive semiconductor layer and to electrically connect; This top electrode and further constituting with the power input of maximum power tracing unit electrically connects;
Utilize aforementioned structure will be in solar cell a built-in maximum power tracing unit (MPPT), improve the energy of the actual output of solar cell thus, and avoid conventional solar cell because of shade, cover, factors such as daylight incident angle or a certain solar cell damage, the problem that causes solar module or array gross output to reduce.
Description of drawings
Fig. 1 is the solar power system calcspar of a preferred embodiment of the present invention;
Fig. 2 is the solar battery structure schematic diagram of a preferred embodiment of the present invention;
Fig. 3 is the structural representation of existing solar cell.
Description of reference numerals: 1-solar module; The 10-solar cell; The 11-solar wafer; 12-maximum power tracing unit; 13-electric capacity; 2-changes transmission unit; The 100-substrate; 101-microelectronic circuit layer; The 102-bottom electrode; The 103-photoconductive semiconductor layer; The 1031-P type semiconductor layer; The 1032-N type semiconductor layer; The 104-antireflection film; The 105-top electrode; The 70-substrate; The 71-bottom electrode; The 72-photoconductive semiconductor layer; The 721-P type semiconductor layer; The 722-N type semiconductor layer; The 73-antireflection film; The 74-top electrode.
Embodiment
Below in conjunction with accompanying drawing, be described in more detail with other technical characterictic and advantage the present invention is above-mentioned.
About a preferred embodiment of the present invention, see also shown in Figure 1, mainly be made up of a more than one solar module 1 and a conversion transmission unit 2, this solar module 1 is made up of a plurality of solar cells 10, and each solar cell 10 comprises:
One solar wafer 11 has one group of dc power output end;
One maximum power tracing unit 12 has a power input and a power output end, and this power input is to be connected with the dc power output end of aforementioned solar wafer 11;
One electric capacity 13 is that cross-over connection is on the power output end of maximum power tracing unit 12.
Aforementioned solar wafer 11 is to send a direct current voltage via its dc power output end, carries out maximum power tracing by the DC power supply that the 12 pairs of solar wafer 11 in maximum power tracing unit are sent; Moreover a solar module 1 is made up of in modes such as series, parallel or connection in series-parallel a plurality of solar cell 10, to obtain the DC power supply of a high voltage and higher-wattage; In the present embodiment, each solar cell 10 is be connected in series mutually by electric capacity 13 by the power output end of its maximum power tracing unit 12, and wherein electric capacity 13 is to be used for equilibrium energy or to compensate energy.Promptly constitute the power output end of solar module 1 after each solar cell 10 is connected in series mutually, this power output end then is connected with the input of conversion transmission unit 2, to change or to transmit.When changing transmission unit 2 as translation function, it can be a direct current to direct current transducer (DC/DC Converter), carries out direct current with the power supply with solar module 1 output direct current is changed; This conversion transmission unit 2 also can be direct current to a-c transducer (DC/AC Converter) or inverter (Inverter), is converted to form of communication in order to the DC power supply with solar module 1 output, the usefulness that can further be incorporated into the power networks for civil power.Certainly, this conversion transmission unit 2 also can be used for transferring electric power merely.
From the above, solar power system of the present invention is to carry out maximum power tracing (MPPT) on each solar cell 10, to improve the energy of solar cell 10 actual outputs, and solve traditional solar power system concentrative implementation maximum power tracing thus, but may be subjected to shade, cover because of solar cell, factor affecting such as daylight incident angle or damage, the problem that causes gross output to reduce.
See also shown in Figure 2ly again, disclose the concrete structure that aforementioned solar cell 10 1 possible embodiments are arranged, it comprises:
One substrate 100;
One microelectronic circuit layer 101 is to be formed on the aforementioned substrates 100, and in order to constitute aforementioned maximum power tracing unit (MPPT), as described in preceding taking off, this maximum power tracing unit has one group of power input and one group of power output end;
One bottom electrode 102 is to adopt to steam, electroplates, print or other modes are formed on the aforementioned microelectronic circuit layer 101, and with the power input formation electric connection of maximum power tracing unit;
One photoconductive semiconductor layer 103 is to adopt gaseous diffusion process, solid phase diffusion method, ion implantation or other modes, is formed on the aforementioned bottom electrode 102; The solar cell that this photoconductive semiconductor layer 103 constituted comprises monocrystalline silicon battery, polycrystal silicon cell, amorphous silicon membrane battery, copper indium diselenide/copper indium diselenide battery, cadmium telluride battery, GaAs battery, dye cell and other kind batteries etc.With the monocrystalline silicon battery is example, aforementioned photoconductive semiconductor layer 103 comprises a p type semiconductor layer 1031 and a n type semiconductor layer 1032, its the two also constitute a P-N semiconductor junction, wherein, p type semiconductor layer 1031 and bottom electrode 102 are adjacent and electrically connect with its formation;
One antireflection film 104 is to adopt physical vapor deposition (PVD) or chemical vapor deposition (CVD) or additive method to be formed on the n type semiconductor layer 1032 of aforementioned photoconductive semiconductor layer 103;
One top electrode 105, identical with bottom electrode 102, be to adopt to steam, electroplates, print or other modes are formed on the aforementioned antireflection film 104, and with the n type semiconductor layer 1032 formation electric connections of photoconductive semiconductor layer 103; This top electrode 105 and further another power input by interlayer conduction means such as via or other electrical connection means and aforementioned maximum power tracing unit constitute electric connection.
Can find out obviously that by the foregoing description this solar cell 10 is to adopt built-in mode and maximum power tracing unit 12 integrates.Have for affiliated technical field again and know usually and can directly on aforementioned microelectronic circuit layer 101, form electric capacity, and be connected across on the power output end of maximum power tracing unit 12 for the knowledgeable.
More than explanation is just illustrative for the purpose of the present invention, and nonrestrictive, those of ordinary skills understand; under the situation of the spirit and scope that do not break away from following claims and limited, can make many modifications, change; or equivalence, but all will fall within the scope of protection of the present invention.
Claims (8)
1. a solar power system that disperses to carry out maximum power tracing is characterized in that, comprises that more than one solar module and is located at the conversion transmission unit of solar module output; Wherein: each solar module is to be connected to form by a plurality of solar cells, and each solar cell comprises:
One solar wafer has a direct current power output end;
One maximum power tracing unit has a power input and a power output end, and this power input is to be connected with the dc power output end of aforementioned solar wafer.
2. carry out the solar power system of maximum power tracing according to the described dispersion of claim 1, it is characterized in that, this solar cell further comprises an electric capacity, and this electric capacity is that cross-over connection is on the power output end of its maximum power tracing unit, and for being connected with other solar cells.
3. according to the solar power system of claim 1 or 2 described dispersions execution maximum power tracings, it is characterized in that this conversion transmission unit is that a direct current is to direct current transducer.
4. according to the solar power system of claim 1 or 2 described dispersions execution maximum power tracings, it is characterized in that this conversion transmission unit is that a direct current is to a-c transducer.
5. according to the solar power system of claim 1 or 2 described dispersions execution maximum power tracings, it is characterized in that this conversion transmission unit is an inverter.
6. according to the solar power system of claim 1 or 2 described dispersions execution maximum power tracings, it is characterized in that each solar cell is to adopt series, parallel or series-parallel system connection.
7. a solar cell is characterized in that, comprising:
One substrate;
One microelectronic circuit layer is to be formed on the aforementioned substrates, in order to constitute a maximum power tracing unit;
One bottom electrode is to be formed on the aforementioned microelectronic circuit layer, and constitutes with the power input of maximum power tracing unit and to electrically connect;
One photoconductive semiconductor layer is to be formed on the aforementioned bottom electrode, has a downside and a upside, and its downside is adjacent with bottom electrode and constitutes electric connection;
One antireflection film is the upside that is formed at photoconductive semiconductor layer;
One top electrode is to be formed on the antireflection film, and constitutes with the upside of photoconductive semiconductor layer and to electrically connect; This top electrode and further constituting with the power input of maximum power tracing unit electrically connects.
8. solar cell according to claim 7 is characterized in that, this microelectronic circuit layer further is formed with an electric capacity, and this electric capacity is to be connected across on the power output end of maximum power tracing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101803196A CN102044988A (en) | 2009-10-22 | 2009-10-22 | Solar electric generating system for decentralized execution of maximum power point tracking and solar battery thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101803196A CN102044988A (en) | 2009-10-22 | 2009-10-22 | Solar electric generating system for decentralized execution of maximum power point tracking and solar battery thereof |
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| CN102044988A true CN102044988A (en) | 2011-05-04 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185507A (en) * | 2011-05-11 | 2011-09-14 | 浙江昱能光伏科技集成有限公司 | Solar photovoltaic three-phase micro-inverter and solar photovoltaic generation system |
| CN103618012A (en) * | 2013-12-02 | 2014-03-05 | 中国航天科技集团公司第五研究院第五一三研究所 | Solar cell panel and photovoltaic conversion device used for laser energy transmission |
| CN103997280A (en) * | 2014-05-24 | 2014-08-20 | 浙江中硅电子科技有限公司 | Intelligent solar photovoltaic assembly |
| CN104170247A (en) * | 2012-03-14 | 2014-11-26 | 东京毅力科创株式会社 | Solar cell module efficacy monitoring system and monitoring method therefor |
| CN105515513A (en) * | 2016-01-29 | 2016-04-20 | 阳光电源股份有限公司 | Photovoltaic inverter and control method thereof |
| CN107902110A (en) * | 2017-11-15 | 2018-04-13 | 上海空间电源研究所 | A kind of highly integrated MPPT standardized modules of open architecture |
| CN110474600A (en) * | 2019-05-22 | 2019-11-19 | 上海空间电源研究所 | A kind of control circuit based on the independent output power generation cascade circuit of input |
-
2009
- 2009-10-22 CN CN2009101803196A patent/CN102044988A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185507A (en) * | 2011-05-11 | 2011-09-14 | 浙江昱能光伏科技集成有限公司 | Solar photovoltaic three-phase micro-inverter and solar photovoltaic generation system |
| CN102185507B (en) * | 2011-05-11 | 2013-10-30 | 浙江昱能光伏科技集成有限公司 | Solar photovoltaic three-phase micro-inverter and solar photovoltaic generation system |
| CN104170247A (en) * | 2012-03-14 | 2014-11-26 | 东京毅力科创株式会社 | Solar cell module efficacy monitoring system and monitoring method therefor |
| CN103618012A (en) * | 2013-12-02 | 2014-03-05 | 中国航天科技集团公司第五研究院第五一三研究所 | Solar cell panel and photovoltaic conversion device used for laser energy transmission |
| CN103618012B (en) * | 2013-12-02 | 2016-01-20 | 中国航天科技集团公司第五研究院第五一三研究所 | A kind of laser passes can use solar panel and photoelectric conversion device |
| CN103997280A (en) * | 2014-05-24 | 2014-08-20 | 浙江中硅电子科技有限公司 | Intelligent solar photovoltaic assembly |
| CN105515513A (en) * | 2016-01-29 | 2016-04-20 | 阳光电源股份有限公司 | Photovoltaic inverter and control method thereof |
| CN107902110A (en) * | 2017-11-15 | 2018-04-13 | 上海空间电源研究所 | A kind of highly integrated MPPT standardized modules of open architecture |
| CN110474600A (en) * | 2019-05-22 | 2019-11-19 | 上海空间电源研究所 | A kind of control circuit based on the independent output power generation cascade circuit of input |
| CN110474600B (en) * | 2019-05-22 | 2021-11-09 | 上海空间电源研究所 | Control circuit based on input independent output series power generation circuit |
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Application publication date: 20110504 |