CN105846515B - A kind of the independent photovoltaic intelligent control method and its device of achievable quick charge - Google Patents
A kind of the independent photovoltaic intelligent control method and its device of achievable quick charge Download PDFInfo
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- CN105846515B CN105846515B CN201610369854.6A CN201610369854A CN105846515B CN 105846515 B CN105846515 B CN 105846515B CN 201610369854 A CN201610369854 A CN 201610369854A CN 105846515 B CN105846515 B CN 105846515B
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- conversion module
- battery
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Classifications
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- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/446—Initial charging measures
-
- 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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
-
- 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
- H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging
-
- 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
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a kind of independent photovoltaic intelligent control method of achievable quick charge and device, method includes that battery 1) is divided into two groups, and the electric energy of solar energy output gives two group storage batteries to charge respectively by DC-DC1 conversion module and DC-DC2 conversion module；2) it charges the initial stage；3) when there is a group storage battery to enter fast charge mode, battery group one and battery group two are switched to pulse charge mode；4) under pulse charge mode, stop charging tempus intercalare in the charging pulse of a group storage battery, discharge to another group storage battery；5) in powering load, battery group one passes through DC-DC2 conversion module powering load by DC-DC1 conversion module powering load, battery group two.Beneficial effects of the present invention: can effectively improve the charging rate and charge efficiency of battery, overcome battery amount of redundancy design requirement and battery in angle of solar battery system and be difficult to the contradictory problems being full of within a sunshine-duration.
Description
Technical field
The present invention relates to solar recharging control technologies, it particularly relates to a kind of independent light of achievable quick charge
Lie prostrate intelligent control method and its device.
Background technique
The structure of existing independent photovoltaic intelligence control system is as shown in Figure 1, its function is to export solar panel
Electric energy is filled in battery in maximum efficiency, and according to the electric power storage situation of battery and other governing factors (such as by light it is strong
Spend the daytime and night of characterization, the factors such as delay time), realize the power supply control to load.Its intelligent charge principle is to fill
The voltage U and electric current I that real-time dynamic monitoring solar panel exports in electric process, according to MPPT maximum power point tracking
(Maximum Power Point Tracking, MPPT) mode, using pulsewidth modulation (Pulse-Width Modulation,
PWM) method controls the on-off of DC-DC (DC-DC) translation circuit, and the electric energy for exporting solar panel is always light
The peak power output of photovoltaic array.DC-DC module when powering load, can according to the electric power storage situation of battery, and
Other control requirements, realize the power supply control to load.
In free-standing solar electric power supply system, battery most widely used at present is valve-regulated lead-acid battery
(Valve-Regulated Lead Acid, VRLA), such battery is generally 3 years or so.VRLA battery has
Its specific charge-discharge characteristic can greatly shorten the service life of battery, under serious situation, can make it if improper use
Reduced service life is within 1 year.Since lead-acid accumulator in production process and scraps treatment process and can all generate a large amount of pollutions
Object, so that replacement battery is of a high price.Research shows that charge/discharge process is very big to the aging effects of battery, especially fill
Electric process.Moreover, conventional charging method charging rate is slow, and the accumulator capacity of free-standing solar power system configuration needs
There are redundancies, to meet the power supply needs of continuous rainy days, therefore, are difficult to using conventional charge control method in one day sunshine
Battery is full of in time, this causes battery often to work in under-voltage condition, will greatly shorten battery life.I.e. existing independence
Following deficiency is primarily present to the charge control method of battery in photovoltaic power supply system:
(1) charging process is slow, it is difficult to effectively be full of battery within a sunshine-duration, battery is caused often to work
In under-voltage condition, system performance is reduced；
(2) normal charge method seriously affects the service life of battery, the excessive replacement of battery improve system operation at
This, the high pollution in storage battery production and scrapping process has seriously affected the spatter property of solar energy.
For the problems in the relevant technologies, currently no effective solution has been proposed.
Summary of the invention
For above-mentioned technical problem in the related technology, the present invention proposes a kind of independent photovoltaic intelligence of achievable quick charge
It can control method and device thereof, the charging rate and charge efficiency of battery can be effectively improved；Battery is realized to charge
Of short duration fast deep electric discharge in journey, and property does not waste；Can maximal efficiency utilize solar energy, extend battery use the longevity
Life.
To realize the above-mentioned technical purpose, the technical scheme of the present invention is realized as follows:
A kind of independent photovoltaic intelligent control method of achievable quick charge, comprising the following steps:
S1: battery is divided into two groups, i.e. battery group one and battery group two, the electric energy of solar energy output passes through DC-
DC1 conversion module and DC-DC2 conversion module charge to battery group one and battery group two respectively；
S2: in the charging initial stage, when the end voltage of battery group is less than quick charge voltage threshold, using MPPT
Algorithm is to battery charging；
S3: when there is a group storage battery to enter fast charge mode, battery group one and battery group two are switched to pulse
Charge mode；
S4: under pulse charge mode, stop charging tempus intercalare in the charging pulse of a group storage battery, to another group of storage
Battery discharges；
S5: in powering load, battery group one passes through DC-DC1 conversion module powering load, battery group two-way
Cross DC-DC2 conversion module powering load.
Further, the step S2 includes:
MPPT processing module detects the voltage U1, U2 and electric current I1, I2 of two groups of charge paths respectively, thus in two groups of chargings
MPPT algorithm is all used on access, and DC-DC1 conversion module is controlled by PWM1 modulation module and PWM2 modulation module respectively
With DC-DC2 conversion module.
Further, when there is a group storage battery to enter fast charge mode, DC-DC1 conversion module and DC-DC2 are converted
Module alternates work, and DC-DC3 conversion module works in the conducting phase of DC-DC2 conversion module, and DC-DC4 modulus of conversion
Block works in the conducting phase of DC-DC1 conversion module, and DC-DC1 conversion module is not simultaneously turned on DC-DC4 conversion module, equally
, DC-DC2 conversion module is not simultaneously turned on DC-DC3 conversion module.
Further, when there is a group storage battery to enter fast charge mode, DC-DC1 conversion module and DC-DC2 conversion
Module conducting direction are as follows: photovoltaic array is connected to battery group.
Further, the step S4 includes:
Battery group one is stopping gap of charging, and controls DC-DC3 conversion module to battery group by PWM3 modulation module
Two electric discharges, similarly, battery group two pass through PWM4 modulation module and control DC-DC4 turns in the stopping charging gap of its charging pulse
Change the mold block to battery group one discharge, battery group charge and discharge periodic process be charge-stopping charge-discharge-to park-charge.
Further, within the period of the charge and discharge, the discharge time of setting is much smaller than the charging time.
The invention further relates to a kind of independent photovoltaic intelligent controlling devices of achievable quick charge, including MPPT to handle mould
Block, battery group one, battery group two and load；The MPPT processing module passes through PWM1 modulation module and DC-DC1 modulus of conversion
Block is connected, and the DC-DC1 conversion module is connected with the battery group one and the load respectively, the DC-DC1 modulus of conversion
Block is also connected with Photovoltaic array；The MPPT processing module is connected by PWM2 modulation module with DC-DC2 conversion module, described
DC-DC2 conversion module is connected with battery group two and the load respectively；The MPPT processing module passes through PWM3 modulation module
It is connected with DC-DC3 conversion module, the DC-DC3 conversion module is connected with the battery group one and battery group two respectively；
The MPPT processing module is connected by PWM4 modulation module with DC-DC4 conversion module, the DC-DC4 conversion module respectively with
The battery group one is connected with battery group.
Further, MPPT processing module further includes current acquisition module and voltage acquisition module.
Beneficial effects of the present invention: the charging rate and charge efficiency of battery can be effectively improved, independent photovoltaic is overcome
Battery amount of redundancy design requirement and battery are difficult to the contradictory problems being full of within a sunshine-duration in system；Realize storage
Of short duration fast deep electric discharge in battery charging process, and property does not waste；Realize MPPT charge mode and pulse
The charging method that formula fast charge mode is taken into account, can maximal efficiency utilize solar energy, and can effective protection during the charging process
Battery, increasing storage battery service life.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of independent photovoltaic Structure of intelligent control system figure involved in background of invention；
Fig. 2 is a kind of structural schematic diagram of the independent photovoltaic intelligent controlling device described according to embodiments of the present invention；
Fig. 3 is the angle of solar battery system topology diagram of the quickly-chargeable scheme of the embodiment of the present invention.
In figure:
1, MPPT processing module；2, PWM1 modulation module；3, DC-DC1 conversion module；4, PWM2 modulation module；5,DC-
DC2 conversion module；6, battery group one；7, battery group two；8, it loads；9, PWM3 modulation module；10, DC-DC3 modulus of conversion
Block；11, PWM4 modulation module；12, DC-DC4 conversion module；13, current acquisition module；14, voltage acquisition module；15, photovoltaic
Array.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art's every other embodiment obtained belong to what the present invention protected
Range.
As shown in Figure 1-3, the independent photovoltaic intelligent control method described according to embodiments of the present invention, comprising the following steps:
S1: battery is divided into two groups, i.e. battery group 1 and battery group 27, the electric energy of solar energy output passes through
DC-DC1 conversion module 3, DC-DC2 conversion module 5 charge to battery group 1 and battery group 27 respectively；
S2: it in the charging initial stage, i.e., when the end voltage of battery group is less than quick charge voltage threshold, uses
MPPT algorithm is to battery charging；
S3: when there is a group storage battery to enter fast charge mode, battery group 1 and battery group 27 are switched to arteries and veins
Rush charge mode；
S4: under fast charge mode, each group uses pulse charging manner, and stops in the charging pulse of a group storage battery
Charge tempus intercalare, discharges to another group storage battery；
S5: in powering load, battery group 1 can give load 8 power supply by DC-DC1 conversion module 3, battery
Group 27 can give load 8 power supply by DC-DC2 conversion module 5.
Wherein, the step S2 includes:
MPPT processing module 1 detects the voltage U1, U2 and electric current I1, I2 of two groups of charge paths respectively, to fill at two groups
MPPT algorithm is all used on electric pathway, and DC-DC1 modulus of conversion is controlled by PWM1 modulation module 2 and PWM2 modulation module 4 respectively
Block 3 and DC-DC2 conversion module 5.
Wherein, the step S3 includes:
When there is a group storage battery to enter fast charge mode, DC-DC1 conversion module 3 and DC-DC2 conversion module 5 are taken turns
Stream works alternatively, and DC-DC3 conversion module 10 works in the conducting phase of DC-DC2 conversion module 5, and DC-DC4 conversion module 12
The conducting phase of DC-DC1 conversion module 3 is worked in, DC-DC1 conversion module 3 and DC-DC4 conversion module 12 does not simultaneously turn on, together
Sample, DC-DC2 conversion module 5 and DC-DC3 conversion module 10 does not simultaneously turn on.
Wherein, when there is a group storage battery to enter fast charge mode, DC-DC1 conversion module 3 and DC-DC2 conversion module
5 conducting directions are as follows: photovoltaic array 15 is connected to battery group, not reversible conducting.
Wherein, the step S4 includes:
Battery group 1 is stopping gap of charging, and controls DC-DC3 conversion module 10 to electric power storage by PWM3 modulation module 9
Pond group 27 is discharged, and similarly, battery group 27 passes through PWM4 modulation module 11 and control in the stopping charging gap of its charging pulse
DC-DC4 conversion module 12 discharges to battery group 1, and battery group charge and discharge periodic process stops for the charge-discharge-that charges-stop
It puts-charges.
Wherein, within the period of the charge and discharge, the discharge time of setting is much smaller than the charging time.
According to another aspect of the present invention, a kind of independent photovoltaic intelligent controlling device, including MPPT processing module 1, electric power storage
Pond group 1, battery group 27 and load 8；The MPPT processing module 1 passes through PWM1 modulation module 2 and DC-DC1 conversion module
3 are connected, and the DC-DC1 conversion module 3 is connected with the battery group 1 and the load 8 respectively, the DC-DC1 conversion
Module 3 is also connected with Photovoltaic array 15；The MPPT processing module 1 passes through 5 phase of PWM2 modulation module 4 and DC-DC2 conversion module
Even, the DC-DC2 conversion module 5 is connected with battery group 27 and the load 8 respectively；The MPPT processing module 1 passes through
PWM3 modulation module 9 is connected with DC-DC3 conversion module 10, the DC-DC3 conversion module 10 respectively with the battery group 1
It is connected with battery group 27；The MPPT processing module 1 is connected by PWM4 modulation module 11 with DC-DC4 conversion module 12,
The DC-DC4 conversion module 12 is connected with the battery group 1 and battery group 27 respectively.
Wherein, the MPPT processing module 1 further includes current acquisition module 13 and voltage acquisition module 14.
In conclusion charging rate and the charging of battery can be effectively improved by means of above-mentioned technical proposal of the invention
Efficiency overcomes battery amount of redundancy design requirement in angle of solar battery system and is difficult to be full of within a sunshine-duration with battery
Contradictory problems；The of short duration fast deep electric discharge in battery charging process is realized, and property does not waste；It realizes
The charging method that MPPT charge mode and pulse type fast charge mode are taken into account, can maximal efficiency utilize solar energy, and can be
Effective protection battery in charging process, increasing storage battery service life.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of independent photovoltaic intelligent control method of achievable quick charge, which comprises the following steps:
S1: battery is divided into two groups, i.e. battery group one and battery group two, the electric energy of solar energy output turns by DC-DC1
Block and DC-DC2 conversion module is changed the mold to charge to battery group one and battery group two respectively；
S2: in the charging initial stage, when the end voltage of battery group one and battery group two is less than quick charge voltage threshold,
Using MPPT algorithm to battery charging；
S3: when there is a group storage battery to enter fast charge mode, battery group one and battery group two are switched to pulse charge
Mode；
S4: under pulse charge mode, battery group one is stopping gap of charging, and controls DC-DC3 by PWM3 modulation module and turns
It changes the mold block to discharge to battery group two, similarly, battery group two is modulated in the stopping charging gap of its charging pulse by PWM4
Module control DC-DC4 conversion module to battery group one discharge, battery group charge and discharge periodic process be charge-stopping filling-put
Electricity-parking-charges；
S5: in powering load, battery group one is passed through by DC-DC1 conversion module powering load, battery group two
DC-DC2 conversion module powering load；
Wherein, the step S3 includes:
When there is a group storage battery to enter fast charge mode, DC-DC1 conversion module and DC-DC2 conversion module alternate work
Make, and DC-DC3 conversion module works in the conducting phase of DC-DC2 conversion module, and DC-DC4 conversion module works in DC-DC1
The conducting phase of conversion module, DC-DC1 conversion module are not simultaneously turned on DC-DC4 conversion module, likewise, DC-DC2 modulus of conversion
Block is not simultaneously turned on DC-DC3 conversion module；
And when there is a group storage battery to enter fast charge mode, DC-DC1 conversion module and DC-DC2 conversion module conducting direction
Are as follows: photovoltaic array is connected to battery group.
2. independent photovoltaic intelligent control method according to claim 1, which is characterized in that the step S2 includes:
MPPT processing module detects the voltage U1, U2 and electric current I1, I2 of two groups of charge paths respectively, thus in two groups of charging paths
On all use MPPT algorithm, and DC-DC1 conversion module and DC- are controlled by PWM1 modulation module and PWM2 modulation module respectively
DC2 conversion module.
3. independent photovoltaic intelligent control method according to claim 1, which is characterized in that in the period of the charge and discharge
Interior, the discharge time of setting is much smaller than the charging time.
4. a kind of independent photovoltaic intelligent control method that achievable quick charge a method according to any one of claims 1-3 can be achieved
Intelligent controlling device, which is characterized in that including the MPPT being made of current acquisition module (13) and voltage acquisition module (14)
Processing module, battery group one, battery group two and load；The MPPT processing module passes through PWM1 modulation module and DC-DC1
Conversion module is connected, and the DC-DC1 conversion module is connected with the battery group one and the load respectively, the DC-DC1
Conversion module is also connected with Photovoltaic array；The MPPT processing module passes through PWM2 modulation module and DC-DC2 conversion module phase
Even, the DC-DC2 conversion module is connected with battery group two and the load respectively；The MPPT processing module passes through PWM3
Modulation module is connected with DC-DC3 conversion module, the DC-DC3 conversion module respectively with the battery group one and battery group
Two are connected；The MPPT processing module is connected by PWM4 modulation module with DC-DC4 conversion module, the DC-DC4 modulus of conversion
Block is connected with the battery group one and battery group two respectively.
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| CN205657469U (en) * | 2016-05-26 | 2016-10-19 | 九江学院 | Can realize independent photovoltaic intelligent control device of quick charge |
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