CN202906790U - A photovoltaic power optimizer - Google Patents
A photovoltaic power optimizer Download PDFInfo
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- CN202906790U CN202906790U CN2012202873564U CN201220287356U CN202906790U CN 202906790 U CN202906790 U CN 202906790U CN 2012202873564 U CN2012202873564 U CN 2012202873564U CN 201220287356 U CN201220287356 U CN 201220287356U CN 202906790 U CN202906790 U CN 202906790U
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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 a photovoltaic power optimizer comprising a DC/DC unit used for boosting or reducing voltage, a MPPT control unit used for determining the maximum power operating point of a photovoltaic array, an input detecting unit used for detecting current and voltage of an input end, an output detecting unit used for detecting current and voltage of an output end, and a switching power supply used for providing operative power for the photovoltaic power optimizer. By data measured by the input detecting unit and the output detecting unit and operational analysis of the MPPT control unit, the DC/DC unit is controlled to achieve output power maximization, preventing a problem of shelter-caused reduction of integral output power of a photovoltaic system.
Description
Technical field
The utility model relates to technical field of solar utilization technique, especially relates to the photo-voltaic power supply optimizer that is applied in field of photovoltaic power generation.
Background technology
Nowadays, the user who solar energy photovoltaic system much is installed has recognized part or the intermittent energy output that can have influence on system that covers.The solar energy system of also installing now and being about to install, what generally adopt is centralized MPPT system, can not cause in the solar panel power loss inhomogeneous because the cell panel that shade or other factors cause does not mate, wherein 10% shade just may cause the loss in institute capacitation source 50%.
Some commerce and dwelling house facility fail to give full play to the potentiality of its energy output, do not cause energy output undesirable because cell panel does not mate, and cause some sundry items to be abandoned.In essence, exist intrinsic space utilization deficiency and the energy that not enough problem is provided.
In the unified situation of radiation, temperature and other battery parameter, except conversion efficiency difference, there is not difference between the performance of distributed MPPT and centralized MPPT.Photovoltaic system is in actual application environment, indivedual or part assembly in the array because blocked, dust, birds ight soil, various Changes in weather, array causes entire system power output this problem that descends towards, assembly inconsistency etc., when adopting centralized MPPT technology, may cause more inhomogeneous loss.The configuration of being incorporated into the power networks of the standard of centralized maximum power point tracking system (MPPT) function, two cell panel cresteds of one of them group row.Centralized MPPT can't arrange direct voltage, therefore can't make the power output of two group row all reach maximum.At High Level DC Voltage point (M1), MPPT makes the power output of not covering the group row reach maximum.At low dc voltage point (M2), MPPT will make the power output of covering group row reach maximum: bypass diode is walked around and is covered cell panel, not the covering cell panel the full dose electric current will be provided of this group row.A plurality of MPP of array may cause concentrating the extraneoas loss of MPPT maximum power point tracking (MPPT) configuration, stop at local maximum point place because the MPPT maximum power point tracking device may obtain error message, and are stabilized in the inferior advantage with V-P feature.Different case study and on-the-spot test prove, part is covered energy output to photovoltaic system and had and seriously influence.By using distributed MPPT control can alleviate the adverse effect of covering system.
Distributed MPPT(DMPPT) function, the output of every photovoltaic panel of separate compensation; Centralized MPPT scheme then is the compensate function to whole electro-optical package arrayed applications one " best fit ".Owing to be not subjected to the impact of adjacent block performance, even if there is a module to lose efficacy, the power output of every solar panel is maximizing still, so DMPPT improves the most promising technology of solar power system production of energy rate.
Because dust, birds ight soil, various Changes in weather, array cause entire system power output this problem that descends towards, assembly inconsistency etc., need to adopt distributed MPPT Techniques For Reducing block impact for energy output in order to prevent.
The utility model content
The purpose of this utility model, overcome exactly the deficiencies in the prior art, a kind of output with compensation photovoltaic panel is provided, avoid cell panel to be subjected to the impact of adjacent block performance, in the time of can mismatch problems appears in the individual cell plate in photovoltaic array, every cell panel still can be exported maximum electric power, reduces as far as possible the photo-voltaic power supply optimizer of the energy output loss that mismatch brings.
In order to achieve the above object, adopt following technical scheme:
A kind of photo-voltaic power supply optimizer is included as the Switching Power Supply that photovoltaic voltage optimizer provides working power; Be used for boosting or the DC/DC unit of step-down, its two ends connect respectively input and the output of photo-voltaic power supply optimizer; Be used for determining the MPPT control unit of photovoltaic array maximum power working point, its connection and control DC/DC unit; Be used for measuring the input detection unit of input electric current and voltage, measurement data feeds back to the MPPT control unit; Be used for measuring the output detections unit of output end current and voltage, measurement data feeds back to the MPPT control unit.
Further, described power supply optimizer also comprise for the component states monitor unit of computer communication, the one end connects the MPPT control unit, the other end is connected with computer communication.
Further, described power supply optimizer also comprises be used to the temperature detecting unit that component states monitor unit temperature information is provided.
Further, described component states monitor unit is RS485 communication part Stateful Inspection unit.
Compared with prior art, the beneficial effects of the utility model are:
The utlity model has the output of compensation photovoltaic panel, avoid cell panel to be subjected to the advantage that affects of adjacent block performance.By the data of each power supply optimizer input detection unit and output detections unit inspection, and the operational analysis of MPPT control unit, control DC/DC realizes the power output maximization in the unit.Even if there is a battery component to lose efficacy, the battery component power output of every solar panel is maximizing still, solve indivedual or the part battery component because blocked, dust, birds ight soil, various Changes in weather, array causes entire system power output this problem that descends towards, assembly inconsistency etc., carrying out distributed MPPT for the battery component in the array follows the tracks of, optimize output, make more efficiently characteristics of photovoltaic generating system system maintenance.
In addition, each battery pack links to each other with the power supply optimizer.The MPPT control unit adopts the maximum power point algorithm that improves to greatest extent each battery component power output.All battery components have identical output current in the whole array, have greatly reduced the hot spot problem and have adopted the internal by-pass pattern.Each power supply optimizer is regulated its output voltage to meet whole bus voltage.The result is that whole photovoltaic system will present the I-V curve with single largest power points, simplifies the operation of central inverter, and reduces as far as possible the energy output loss that mismatch is brought.
Description of drawings
Fig. 1 is power supply optimizer structural representation described in the utility model.
Diagram: 1-power supply optimizer; 2-DC/DC unit; 3-input detection unit; 4-MPPT control unit;
5-output detections unit; 6-Switching Power Supply; 7-component states monitor unit; 8-temperature detecting unit.
Embodiment
Describe the utility model in detail below in conjunction with accompanying drawing and specific implementation method, be used for explaining the utility model in schematic enforcement of the present utility model and explanation, but not as to restriction of the present utility model.
A kind of photo-voltaic power supply optimizer 1 comprises DC/DC unit 2, input detection unit 3, MPPT control unit 4, output detections unit 5, Switching Power Supply 6.
Described DC/DC unit 2 is used for improving or reducing the voltage of photo-voltaic power supply optimizer 1 output, and it connects input and the output of power supply optimizer 1.MPPT control unit 4 is used for determining photovoltaic array maximum power working point, its connection and control DC/DC unit 2.Switching Power Supply 6 provides working power for power supply optimizer 1.Input electric current that be used for to measure power supply optimizer 1 is connected input detection unit 3 one ends and is connected the input of power supply optimizer 1 with voltage, the other end is connected with MPPT control unit 4 for the power points of the maximum of real-time tracking solar panels.Electric current that be used for to measure the output of power supply optimizer 1 is connected output detections unit 5 and is connected with MPPT control unit 4 for the power points of the maximum of real-time tracking solar panels with voltage.Its electric current and voltage are measured respectively at input and the output of power supply optimizer 1 in input detection unit 3 and output detections unit 5, and this value is sent to MPPT control unit 4.MPPT control unit 4 adopts the maximum power point algorithm that improves to greatest extent each photo-voltaic power supply optimizer power output, current value, the magnitude of voltage of the output that current value, magnitude of voltage and the output detections unit 5 of the input of measuring by input detection unit 3 relatively measured, and then control DC/DC unit 2, adjust output voltage and the electric current of the battery component in the photo-voltaic power supply, make the battery component of photovoltaic system reach maximum power.
The utility model also comprises temperature detecting unit 8, and it is connected with component states monitor unit 7, and the temperature information that detects is sent to component states monitor unit 7.Because during variations in temperature, can the crest voltage of solar panels be exerted an influence, these impacts be can not ignore.Therefore need the monitoring temperature variation on the impact of solar panels, otherwise can have a strong impact on the conversion ratio of solar energy.
The utility model also comprises component states monitor unit 7.It is connected with MPPT control unit 4.Component states monitor unit 7 is uploaded to computer with the data of input detection unit 2, output detections unit 3, temperature detecting unit 8 detections and the relevant data that 4 computings of MPPT control unit obtain by component states monitor unit 7.By Computer Analysis, can obtain the real-time working situation of photo-voltaic power supply.As preferably, component states monitor unit 7 is RS485 communication part Stateful Inspection unit.The utility model is connected with the RS485 network being connected with the communication of computer by the RS485 interface.Except passing through RS485 communication part Stateful Inspection unit and computer communication is connected, can also adopt the wireless connections of WIFI, CDMA or alternate manner.
Utilize the optimization of the described photo-voltaic power supply optimizer realization of present embodiment photo-voltaic power supply can adopt following steps:
Electric current and the voltage of photo-voltaic power supply optimizer output is measured in output detections unit 5;
Claims (4)
1. photo-voltaic power supply optimizer is characterized in that comprising:
The Switching Power Supply of working power is provided for photovoltaic voltage optimizer;
Be used for boosting or the DC/DC unit of step-down, its two ends connect respectively input and the output of photo-voltaic power supply optimizer;
Be used for determining the MPPT control unit of photovoltaic array maximum power working point, its connection and control DC/DC unit;
Be used for measuring the input detection unit of input electric current and voltage, measurement data feeds back to the MPPT control unit;
Be used for measuring the output detections unit of output end current and voltage, measurement data feeds back to the MPPT control unit.
2. photo-voltaic power supply optimizer according to claim 1 is characterised in that: described power supply optimizer also comprise for the component states monitor unit of computer communication, the one end connects the MPPT control unit, the other end is connected with computer communication.
3. photo-voltaic power supply optimizer according to claim 1, be characterised in that: described power supply optimizer also comprises be used to the temperature detecting unit that component states monitor unit temperature information is provided.
4. photo-voltaic power supply optimizer according to claim 2 is characterised in that, described component states monitor unit is RS485 communication part Stateful Inspection unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202873564U CN202906790U (en) | 2012-06-18 | 2012-06-18 | A photovoltaic power optimizer |
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| CN2012202873564U CN202906790U (en) | 2012-06-18 | 2012-06-18 | A photovoltaic power optimizer |
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| CN202906790U true CN202906790U (en) | 2013-04-24 |
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| CN2012202873564U Expired - Fee Related CN202906790U (en) | 2012-06-18 | 2012-06-18 | A photovoltaic power optimizer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103516304A (en) * | 2012-06-18 | 2014-01-15 | 广东旭粤新能源科技有限公司 | A photovoltaic power optimizer and an optimization method thereof |
| CN107482672A (en) * | 2017-07-20 | 2017-12-15 | 苏州艾特博斯智能设备有限公司 | A kind of distributed photovoltaic component optimization method and device based on tuning algorithm |
| US10199832B2 (en) | 2015-04-28 | 2019-02-05 | First Solar, Inc. | Photovoltaic DC power distribution system |
| CN113315217A (en) * | 2021-06-17 | 2021-08-27 | 上海数明半导体有限公司 | Photovoltaic power supply system and electronic equipment |
-
2012
- 2012-06-18 CN CN2012202873564U patent/CN202906790U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103516304A (en) * | 2012-06-18 | 2014-01-15 | 广东旭粤新能源科技有限公司 | A photovoltaic power optimizer and an optimization method thereof |
| US10199832B2 (en) | 2015-04-28 | 2019-02-05 | First Solar, Inc. | Photovoltaic DC power distribution system |
| CN107482672A (en) * | 2017-07-20 | 2017-12-15 | 苏州艾特博斯智能设备有限公司 | A kind of distributed photovoltaic component optimization method and device based on tuning algorithm |
| CN113315217A (en) * | 2021-06-17 | 2021-08-27 | 上海数明半导体有限公司 | Photovoltaic power supply system and electronic equipment |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20130424 Termination date: 20160618 |