CN107104499A - The output control method of photovoltaic module peak power - Google Patents
The output control method of photovoltaic module peak power Download PDFInfo
- Publication number
- CN107104499A CN107104499A CN201710283707.1A CN201710283707A CN107104499A CN 107104499 A CN107104499 A CN 107104499A CN 201710283707 A CN201710283707 A CN 201710283707A CN 107104499 A CN107104499 A CN 107104499A
- Authority
- CN
- China
- Prior art keywords
- photovoltaic module
- super capacitor
- control method
- output control
- peak power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/66—Regulating electric power
- G05F1/67—Regulating electric power to the maximum power available from a generator, e.g. from solar cell
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
-
- 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 present invention discloses the output control method of photovoltaic module peak power, and the output control method includes：Step 1, photovoltaic module is charged to super capacitor；Step 2, the voltage and charging current at super capacitor two ends are continued to monitor, the power output of photovoltaic module is obtained；Step 3, detecting in the case that the power output starts reduction, the energy that super capacitor is stored is being exported to load.The output control method of the photovoltaic module peak power overcomes the problem of photovoltaic module MPPT maximum power point tracking of the prior art is inconvenient, realizes the MPPT maximum power point tracking of photovoltaic module, and realizes discharging efficiency maximization.
Description
Technical field
The present invention relates to the output control of photovoltaic module peak power, in particular it relates to which photovoltaic module peak power is defeated
Discharge control method.
Background technology
Under certain intensity of sunshine and environment temperature, photovoltaic module connects load impedance difference, and power output is different.By
Circuit theory is understood, only when the real-time best match impedance of connect load impedance and photovoltaic module is equal, photovoltaic module
Power output can be only achieved maximum.Therefore, in photovoltaic generating system, the whole efficiency of system is improved, one important
Approach is exactly that real-time adjustment connects load impedance, is allowed to the best match impedance of consistently equal to photovoltaic module, this process just claims
Be MPPT maximum power point tracking.
Nowadays how the maximum power point of photovoltaic module is tracked, how allows photovoltaic module to be carried out with peak power
The problem of being output into a kind of urgent need to resolve.
The content of the invention
It is an object of the invention to provide a kind of output control method of photovoltaic module peak power, the photovoltaic module maximum work
The output control method of rate overcomes the problem of photovoltaic module MPPT maximum power point tracking of the prior art is inconvenient, realizes light
The MPPT maximum power point tracking of component is lied prostrate, and realizes discharging efficiency maximization.
To achieve these goals, the invention provides a kind of output control method of photovoltaic module peak power, this is defeated
Discharge control method includes：
Step 1, photovoltaic module is charged to super capacitor；
Step 2, the voltage and charging current at super capacitor two ends are continued to monitor, the power output of photovoltaic module is obtained；
Step 3, detecting in the case that the power output starts reduction, the energy that super capacitor is stored is exported
To load.
Preferably, after step 3, the output control method also includes：
Step 4, the voltage at super capacitor two ends is continued to monitor, the voltage at the super capacitor two ends when starting to export electricity
In the case of declining preset value, the energy output of super capacitor is closed.
Preferably, the preset value is 0.2V.
Preferably, the super capacitor is nickel carbon super capacitor.
Preferably, in step 1, photovoltaic module is charged with short circuit current flow to super capacitor.
Preferably, repeat step 1-3, obtains the maximum power point of photovoltaic module, and be in maximum in the photovoltaic module
In the case of power points, the energy that super capacitor is stored is exported to load.
By above-mentioned embodiment, using the features such as super capacitor discharge and recharge frequency is high, power density is big, by photovoltaic group
The electric energy that part is sent is first stored in super capacitor, then will be stored in super capacitor electric energy after appropriate adjustment with maximum
Power points is conveyed to load and uses or be incorporated to direct-current micro-grid.
Other features and advantages of the present invention will be described in detail in subsequent embodiment part.
Brief description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute a part for specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the flow chart for the output control method for illustrating a kind of photovoltaic module peak power of the present invention；
Fig. 2 is the circuit topological structure figure for illustrating a kind of auxiliary circuit for photovoltaic module of the present invention.
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
The present invention provides a kind of output control method of photovoltaic module peak power, and the output control method includes：
Step 1, photovoltaic module is charged to super capacitor；
Step 2, the voltage and charging current at super capacitor two ends are continued to monitor, the power output of photovoltaic module is obtained；
Step 3, detecting in the case that the power output starts reduction, the energy that super capacitor is stored is exported
To load.
By above-mentioned embodiment, using the features such as super capacitor discharge and recharge frequency is high, power density is big, by photovoltaic group
The electric energy that part is sent is first stored in super capacitor, then will be stored in super capacitor electric energy after appropriate adjustment with maximum
Power points is conveyed to load and uses or be incorporated to direct-current micro-grid.
Above in association with accompanying drawing, 1 couple of present invention is further detailed, in the present invention, in order to improve being applicable for the present invention
Scope, is especially realized using following embodiments.
In a kind of embodiment of the present invention, after step 3, the output control method can also include：
Step 4, the voltage at super capacitor two ends is continued to monitor, the voltage at the super capacitor two ends when starting to export electricity
In the case of declining preset value, the energy output of super capacitor is closed.
By above-mentioned mode, closing output after certain value is dropped under voltage, the peak power of photovoltaic module is controlled
Point or so output voltage, makes photovoltaic module Maximum Power Output.
In this kind of embodiment, it is preferable that the preset value is 0.2V.
In a kind of embodiment of the present invention, the super capacitor is nickel carbon super capacitor.
In a kind of embodiment of the present invention, in step 1, by photovoltaic module with short circuit current flow to super capacitor
Charging.It is directly connected to by wire, photovoltaic module is charged with its maximum current that can be exported to super capacitor all the time.
In this kind of embodiment, in order to export energy in maximum power point, repeat step 1-3 obtains photovoltaic module
Maximum power point, and in the case where the photovoltaic module is in maximum power point, the energy that super capacitor is stored is exported
To load.
In a kind of most preferred embodiment of the present invention, as shown in Fig. 2 when there is illumination, photovoltaic module is with short circuit
Electric current is that the maximum current that photovoltaic module can be exported charges to super capacitor, and the voltage at super capacitor two ends rises therewith,
In super capacitor both end voltage uphill process, photovoltaic module is charged with its maximum current that can be exported to super capacitor all the time,
In the case of the selection of super capacitor parameter is suitable, its both end voltage will be quickly risen near maximum power point, afterwards photovoltaic
The output current of component will be substantially reduced, and the speed that voltage rises on super capacitor is just slack-off, by constantly detecting super capacitor
The voltage and charging current at two ends, so that it may draw the power of photovoltaic module output, are opened in the power for detecting photovoltaic module output
At the time of beginning to reduce (output voltage of photovoltaic module is higher than maximum power point voltage value), the work(in control DC/DC converters
Rate device is open-minded, and the energy that super capacitor is stored is output into load, and the voltage at super capacitor two ends simultaneously declines therewith, photovoltaic group
The output current of part will increase, but much smaller than the electric current for being supplied to load.Decline one in super capacitor both end voltage and fix electricity
Press after step-length (as declined 0.2V), the power device in shut-off DC/DC converters, photovoltaic module exports electric energy to super electricity again
Capacity charge.By the detection in several cycles with being compared, so that it may search the maximum power point of photovoltaic module, control DC/DC conversion
Device works in maximum power point of photovoltaic module or so, makes photovoltaic module Maximum Power Output.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, still, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the present invention, a variety of letters can be carried out to technical scheme
Monotropic type, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (6)
1. a kind of output control method of photovoltaic module peak power, it is characterised in that the output control method includes：
Step 1, photovoltaic module is charged to super capacitor；
Step 2, the voltage and charging current at super capacitor two ends are continued to monitor, the power output of photovoltaic module is obtained；
Step 3, detecting in the case that the power output starts reduction, the energy that super capacitor is stored is being exported to negative
Carry.
2. the output control method of photovoltaic module peak power according to claim 1, it is characterised in that step 3 it
Afterwards, the output control method also includes：
Step 4, the voltage at super capacitor two ends is continued to monitor, the voltage at the super capacitor two ends when starting to export electricity declines
In the case of preset value, the energy output of super capacitor is closed.
3. the output control method of photovoltaic module peak power according to claim 2, it is characterised in that the preset value
For 0.2V.
4. the output control method of photovoltaic module peak power according to claim 1, it is characterised in that the super electricity
Hold for nickel carbon super capacitor.
5. the output control method of photovoltaic module peak power according to claim 1, it is characterised in that in step 1,
Photovoltaic module is charged with short circuit current flow to super capacitor.
6. the output control method of photovoltaic module peak power according to claim 2, it is characterised in that repeat step 1-
3, the maximum power point of photovoltaic module is obtained, and in the case where the photovoltaic module is in maximum power point, by super capacitor
The energy stored is exported to load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710283707.1A CN107104499A (en) | 2017-04-26 | 2017-04-26 | The output control method of photovoltaic module peak power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710283707.1A CN107104499A (en) | 2017-04-26 | 2017-04-26 | The output control method of photovoltaic module peak power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107104499A true CN107104499A (en) | 2017-08-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710283707.1A Pending CN107104499A (en) | 2017-04-26 | 2017-04-26 | The output control method of photovoltaic module peak power |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101248532A (en) * | 2005-07-20 | 2008-08-20 | 益环科技公司 | Photovoltaic power output and utilization device |
| CN102545698A (en) * | 2010-12-24 | 2012-07-04 | 阿特斯(中国)投资有限公司 | Tracking method for maximum power point of photovoltaic assembly |
| CN103647501A (en) * | 2013-12-09 | 2014-03-19 | 湖南大学 | Photovoltaic power structure and maximum power tracking control method |
| CN104345767A (en) * | 2013-08-08 | 2015-02-11 | 鸿富锦精密工业（深圳）有限公司 | Tracking device and tracking method of maximum power point of photovoltaic module |
-
2017
- 2017-04-26 CN CN201710283707.1A patent/CN107104499A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101248532A (en) * | 2005-07-20 | 2008-08-20 | 益环科技公司 | Photovoltaic power output and utilization device |
| CN102545698A (en) * | 2010-12-24 | 2012-07-04 | 阿特斯(中国)投资有限公司 | Tracking method for maximum power point of photovoltaic assembly |
| CN104345767A (en) * | 2013-08-08 | 2015-02-11 | 鸿富锦精密工业（深圳）有限公司 | Tracking device and tracking method of maximum power point of photovoltaic module |
| CN103647501A (en) * | 2013-12-09 | 2014-03-19 | 湖南大学 | Photovoltaic power structure and maximum power tracking control method |
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Application publication date: 20170829 |