CN105846515A - Independent photovoltaic intelligent control method and device capable of realizing rapid charging - Google Patents
Independent photovoltaic intelligent control method and device capable of realizing rapid charging Download PDFInfo
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- CN105846515A CN105846515A CN201610369854.6A CN201610369854A CN105846515A CN 105846515 A CN105846515 A CN 105846515A CN 201610369854 A CN201610369854 A CN 201610369854A CN 105846515 A CN105846515 A CN 105846515A
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- modular converter
- batteries
- charging
- charge
- independent photovoltaic
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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
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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
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses an independent photovoltaic intelligent control method and device capable of realizing rapid charging. The method comprises following steps of 1), dividing storage batteries into two groups, wherein the two groups of storage batteries are charged by electric energy output by solar energy after the electric energy passes through a DC-DC1 conversion module and a DC-DC2 conversion module; 2), carrying out an initial charging stage; 3), switching a first storage battery group and a second storage battery group to a pulse charging mode when one group of storage batteries enter a rapid charging mode; 4), discharging the other group of storage batteries during the charging stopping interval period of the charging pulses of one group of batteries in the pulse charging mode; 5), supplying power to a load by the first group of storage batteries through adoption of the DC-DC1 conversion module when the power is supplied to the load; and supplying the power to the load by the second group of storage batteries through adoption of the DC-DC2 conversion module. The method and the device have the advantages that the charging speed and charging efficiency of the storage batteries can be effectively improved, and the contradictory problem of the redundancy design demand of the storage batteries and the fact that the storage batteries are difficult to charge fully in sunshine duration of one day in the independent photovoltaic system is overcome.
Description
Technical field
The present invention relates to solar charging electric control technology, it particularly relates to a kind of independent photovoltaic intelligent control method realizing quick charge and device thereof.
Background technology
The structure of existing independent photovoltaic intelligence control system is as shown in Figure 1, its function is to be filled with in maximum efficiency in battery by the electric energy that solar panel exports, and the electric power storage situation and other governing factor according to battery is (such as the daytime characterized by light intensity and night, the factors such as delay time), it is achieved the power supply control to load.Its intelligent charge principle is the voltage U and electric current I of the output of real-time dynamic monitoring solar panel in charging process, according to MPPT maximum power point tracking (Maximum Power
Point Tracking, MPPT) mode, use pulsewidth modulation (Pulse-Width
Modulation, PWM) method, control the break-make of DC-to-dc (DC-DC) translation circuit, the electric energy making solar panel export is always the peak power output of photovoltaic array.DC-DC
Module powering load when, can according to the electric power storage situation of battery, and other control requirement, it is achieved to load power supply control.
In stand alone type solar electric power supply system, the most most widely used battery is analysing valve control type lead-acid accumulator battery (Valve-Regulated Lead Acid, VRLA), and such battery is generally about 3 years.VRLA battery has its specific charge-discharge characteristic, if improper use, can greatly shorten the service life of battery, serious in the case of, within making foreshorten to 1 year its service life.Owing to lead-acid accumulator in production process and is scrapped processing procedure and all can be produced a large amount of pollutant so that change the of a high price of battery.Research shows that charge/discharge process is very big to the aging effects of battery, especially charging process.And, conventional charging method charging rate is slow, and redundancy need to be there is in the accumulator capacity of stand alone type solar power system configuration, to meet the most overcast and rainy power supply needs, therefore, using conventional charge control method to be difficult to be full of by battery within a sunshine-duration, this causes battery often to work in under-voltage condition, will greatly shorten battery life.In the most existing independent photovoltaic electric power system, charge control method to battery is primarily present following deficiency:
(1) charging process is slow, it is difficult to be effectively full of by battery within a sunshine-duration, causes battery often to work in under-voltage condition, reduces system performance；
(2) normal charge method has a strong impact on the life-span of battery, and excessively changing of battery improves system operation cost, storage battery production with scrap during high pollution had a strong impact on the spatter property of solar energy.
For the problem in correlation technique, effective solution is the most not yet proposed.
Summary of the invention
For the above-mentioned technical problem in correlation technique, the present invention proposes a kind of independent photovoltaic intelligent control method realizing quick charge and device thereof, it is possible to be effectively improved charging rate and the charge efficiency of battery；Achieve the of short duration fast deep electric discharge in battery charging process, and property is not wasted；Maximal efficiency can utilize solar energy, increasing storage battery service life.
For realizing above-mentioned technical purpose, the technical scheme is that and be achieved in that:
A kind of independent photovoltaic intelligent control method realizing quick charge, comprises the following steps:
S1: battery is divided into two groups, i.e. batteries one and batteries two, the electric energy of solar energy output passes through
DC-DC1 modular converter and DC-DC2 modular converter charge to respectively batteries one and batteries two；
S2: in the charging starting stage, when the terminal voltage of batteries is less than quick charge voltage threshold, uses MPPT algorithm to battery charging；
S3: when there being a group storage battery to enter fast charge mode, batteries one and batteries two switch to pulse charge pattern；
S4: under pulse charge pattern, the charging pulse at a group storage battery stops charging room off period, discharges to another group storage battery；
S5: when powering load, batteries one is by DC-DC1 modular converter powering load, and batteries two is by DC-DC2 modular converter powering load.
Further, described step S2 includes:
MPPT processing module detects the voltage U1 of two groups of charge paths respectively, U2 and electric current I1, I2, thus on two groups of charging path, all use MPPT algorithm, and control DC-DC1 modular converter and DC-DC2 modular converter by PWM1 modulation module and PWM2 modulation module respectively.
Further, when have one group storage battery enter fast charge mode time, DC-DC1 modular converter with
DC-DC2 modular converter one after the other works, and DC-DC3 modular converter works in the conducting phase of DC-DC2 modular converter, and DC-DC4 modular converter works in the conducting phase of DC-DC1 modular converter, DC-DC1 modular converter does not simultaneously turns on DC-DC4 modular converter, same, DC-DC2 modular converter does not simultaneously turns on DC-DC3 modular converter.
Further, when there being a group storage battery to enter fast charge mode, DC-DC1 modular converter and DC-DC2 modular converter conducting direction be: photovoltaic array turns on to batteries.
Further, described step S4 includes:
Batteries one is stopping charging gap, control DC-DC3 modular converter by PWM3 modulation module to discharge to batteries two, in like manner, batteries two is in the stopping charging gap of its charging pulse, controlling DC-DC4 modular converter by PWM4 modulation module to discharge to batteries one, batteries charge and discharge periodic process is charge-discharge of charging-stop-park-charge.
Further, within the cycle of described charge and discharge, the discharge time of setting is much smaller than the charging interval.
The invention still further relates to a kind of independent photovoltaic intelligent controlling device realizing quick charge, including MPPT processing module, batteries one, batteries two and load；Described MPPT processing module is connected with DC-DC1 modular converter by PWM1 modulation module, and described DC-DC1 modular converter is connected with described batteries one and described load respectively, and described DC-DC1 modular converter is also associated with Photovoltaic array；Described MPPT processing module is connected with DC-DC2 modular converter by PWM2 modulation module, and described DC-DC2 modular converter is connected with batteries two and described load respectively；Described MPPT processing module is connected with DC-DC3 modular converter by PWM3 modulation module, and described DC-DC3 modular converter is connected with described batteries one and batteries two respectively；Described MPPT processing module is connected with DC-DC4 modular converter by PWM4 modulation module, described DC-DC4 modular converter respectively with described batteries one and batteries and be connected.
Further, MPPT processing module also includes current acquisition module and voltage acquisition module.
Beneficial effects of the present invention: can be effectively improved charging rate and the charge efficiency of battery, overcomes battery amount of redundancy design in angle of solar battery system and requires to be difficult within a sunshine-duration full contradictory problems with battery；Achieve the of short duration fast deep electric discharge in battery charging process, and property is not wasted；Achieve MPPT
The charging method that charge mode and pulse type fast charge pattern are taken into account, maximal efficiency can utilize solar energy, can effectively protect again battery, increasing storage battery service life in charging process.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment will be briefly described below, apparently, accompanying drawing in describing below is only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is a kind of independent photovoltaic Structure of intelligent control system figure involved by background of invention；
Fig. 2 is the structural representation of a kind of 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 modular converter；4, PWM2 modulation module；5, DC-DC2 modular converter；6, batteries one；7, batteries two；8, load；9, PWM3 modulation module；10, DC-DC3 modular converter；11, PWM4 modulation module；12, DC-DC4 modular converter；13, current acquisition module；14, voltage acquisition module；15, Photovoltaic array.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained, broadly fall into the scope of protection of the invention.
As Figure 1-3, independent photovoltaic intelligent control method described according to embodiments of the present invention, comprise the following steps:
S1: battery is divided into two groups, i.e. batteries 1 and batteries 27, the electric energy of solar energy output passes through
DC-DC1 modular converter 3, DC-DC2 modular converter 5 gives batteries 1 and batteries 27 charging respectively；
S2: in the charging starting stage, i.e. when the terminal voltage of batteries is less than quick charge voltage threshold, uses MPPT algorithm to battery charging；
S3: when there being a group storage battery to enter fast charge mode, batteries 1 and batteries 27 switch to pulse charge pattern；
S4: under fast charge mode, each group uses pulse charging manner, and at the charging pulse stopping charging room off period of a group storage battery, discharges to another group storage battery；
S5: when powering load, batteries 1 can be given by DC-DC2 modular converter 5 by DC-DC1 modular converter 3 load 8 power supplies to load 8 power supply, batteries 27.
Wherein, described step S2 includes:
MPPT processing module 1 detects the voltage U1 of two groups of charge paths respectively, U2 and electric current I1, I2, thus on two groups of charging path, all use MPPT algorithm, and control DC-DC1 modular converter 3 and DC-DC2 modular converter 5 by PWM1 modulation module 2 and PWM2 modulation module 4 respectively.
Wherein, described step S3 includes:
When there being a group storage battery to enter fast charge mode, DC-DC1 modular converter 3 works with DC-DC2 modular converter 5 one after the other, and DC-DC3 modular converter 10 works in the conducting phase of DC-DC2 modular converter 5, and DC-DC4 modular converter 12 works in the conducting phase of DC-DC1 modular converter 3, DC-DC1 modular converter 3 does not simultaneously turns on DC-DC4 modular converter 12, same, DC-DC2 modular converter 5 does not simultaneously turns on DC-DC3 modular converter 10.
Wherein, when there being a group storage battery to enter fast charge mode, DC-DC1 modular converter 3 and DC-DC2 modular converter 5 conducting direction is: photovoltaic array 15 turns on to batteries, not reversible conducting.
Wherein, described step S4 includes:
Batteries 1 is stopping charging gap, control DC-DC3 modular converter 10 by PWM3 modulation module 9 to discharge to batteries 27, in like manner, batteries 27 is in the stopping charging gap of its charging pulse, controlling DC-DC4 modular converter 12 by PWM4 modulation module 11 to discharge to batteries 1, batteries charge and discharge periodic process is charge-discharge of charging-stop-park-charge.
Wherein, within the cycle of described charge and discharge, the discharge time of setting is much smaller than the charging interval.
According to a further aspect in the invention, a kind of independent photovoltaic intelligent controlling device, including MPPT processing module 1, batteries 1, batteries 27 and load 8；Described MPPT processing module 1 is connected with DC-DC1 modular converter 3 by PWM1 modulation module 2, and described DC-DC1 modular converter 3 is connected with described batteries 1 and described load 8 respectively, and described DC-DC1 modular converter 3 is also associated with Photovoltaic array 15；Described MPPT processing module 1 is connected with DC-DC2 modular converter 5 by PWM2 modulation module 4, and described DC-DC2 modular converter 5 is connected with batteries 27 and described load 8 respectively；Described MPPT processing module 1 is connected with DC-DC3 modular converter 10 by PWM3 modulation module 9, and described DC-DC3 modular converter 10 is connected with described batteries 1 and batteries 27 respectively；Described MPPT processing module 1 is connected with DC-DC4 modular converter 12 by PWM4 modulation module 11, and described DC-DC4 modular converter 12 is connected with described batteries 1 and batteries 27 respectively.
Wherein, described MPPT processing module 1 also includes current acquisition module 13 and voltage acquisition module 14.
In sum, by means of the technique scheme of the present invention, charging rate and the charge efficiency of battery can be effectively improved, overcome battery amount of redundancy design in angle of solar battery system and require to be difficult within a sunshine-duration full contradictory problems with battery；Achieve the of short duration fast deep electric discharge in battery charging process, and property is not wasted；Achieve MPPT
The charging method that charge mode and pulse type fast charge pattern are taken into account, maximal efficiency can utilize solar energy, can effectively protect again battery, increasing storage battery service life in charging process.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (8)
1. the independent photovoltaic intelligent control method that can realize quick charge, it is characterised in that comprise the following steps:
S1: battery is divided into two groups, i.e. batteries one and batteries two, the electric energy of solar energy output charges to respectively batteries one and batteries two through DC-DC1 modular converter and DC-DC2 modular converter；
S2: in the charging starting stage, when the terminal voltage of batteries is less than quick charge voltage threshold, uses
MPPT algorithm is to battery charging；
S3: when there being a group storage battery to enter fast charge mode, batteries one and batteries two switch to pulse charge pattern；
S4: under pulse charge pattern, the charging pulse at a group storage battery stops charging room off period, discharges to another group storage battery；
S5: when powering load, batteries one is by DC-DC1 modular converter powering load, and batteries two is by DC-DC2 modular converter powering load.
Independent photovoltaic intelligent control method the most according to claim 1, it is characterised in that described step S2 includes:
MPPT processing module detects the voltage U1 of two groups of charge paths respectively, U2 and electric current I1, I2, thus on two groups of charging path, all use MPPT algorithm, and control DC-DC1 modular converter and DC-DC2 modular converter by PWM1 modulation module and PWM2 modulation module respectively.
Independent photovoltaic intelligent control method the most according to claim 1, it is characterised in that described step S3 includes:
When there being a group storage battery to enter fast charge mode, DC-DC1 modular converter works with DC-DC2 modular converter one after the other, and DC-DC3 modular converter works in the conducting phase of DC-DC2 modular converter, and DC-DC4 modular converter works in the conducting phase of DC-DC1 modular converter, DC-DC1 modular converter does not simultaneously turns on DC-DC4 modular converter, same, DC-DC2 modular converter does not simultaneously turns on DC-DC3 modular converter.
Independent photovoltaic intelligent control method the most according to claim 3, it is characterised in that when there being a group storage battery to enter fast charge mode, DC-DC1 modular converter and DC-DC2 modular converter conducting direction be: photovoltaic array turns on to batteries.
Independent photovoltaic intelligent control method the most according to claim 1, it is characterised in that described step S4 includes:
Batteries one is stopping charging gap, control DC-DC3 modular converter by PWM3 modulation module to discharge to batteries two, in like manner, batteries two is in the stopping charging gap of its charging pulse, controlling DC-DC4 modular converter by PWM4 modulation module to discharge to batteries one, batteries charge and discharge periodic process is charge-discharge of charging-stop-park-charge.
Independent photovoltaic intelligent control method the most according to claim 5, it is characterised in that within the cycle of described charge and discharge, is much smaller than the charging interval discharge time of setting.
7. the independent photovoltaic intelligent controlling device that can realize quick charge, it is characterised in that include MPPT processing module, batteries one, batteries two and load；Described MPPT processing module is connected with DC-DC1 modular converter by PWM1 modulation module, and described DC-DC1 modular converter is connected with described batteries one and described load respectively, and described DC-DC1 modular converter is also associated with Photovoltaic array；Described MPPT processing module is connected with DC-DC2 modular converter by PWM2 modulation module, and described DC-DC2 modular converter is connected with batteries two and described load respectively；Described MPPT processing module is connected with DC-DC3 modular converter by PWM3 modulation module, and described DC-DC3 modular converter is connected with described batteries one and batteries two respectively；Described MPPT processing module is connected with DC-DC4 modular converter by PWM4 modulation module, and described DC-DC4 modular converter is connected with described batteries one and batteries two respectively.
Independent photovoltaic intelligent controlling device the most according to claim 7, it is characterised in that described MPPT processing module also includes current acquisition module and voltage acquisition module.
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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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2016
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Patent Citations (7)
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| CN101242105A (en) * | 2008-03-17 | 2008-08-13 | 云南晶能科技有限公司 | Photovoltaic system intelligent complementary control charging/discharging method |
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