CN109995127A - A kind of smooth storage solution power-supply system and its control method - Google Patents
A kind of smooth storage solution power-supply system and its control method Download PDFInfo
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- CN109995127A CN109995127A CN201910244950.1A CN201910244950A CN109995127A CN 109995127 A CN109995127 A CN 109995127A CN 201910244950 A CN201910244950 A CN 201910244950A CN 109995127 A CN109995127 A CN 109995127A
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- boost
- energy
- circuit module
- buck circuit
- photovoltaic
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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
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
-
- 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
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/20—Climate change mitigation technologies for sector-wide applications using renewable energy
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Dc-Dc Converters (AREA)
- Secondary Cells (AREA)
Abstract
The present invention provides a kind of smooth storage solution power-supply system and control method, comprising: photovoltaic generating system comprising the output end of photovoltaic battery array and Boost boost chopper, the photovoltaic battery array is connected with the input terminal of Boost boost chopper；Energy-storage battery group comprising multiple series-parallel energy-storage battery units；DC/DC current transformer comprising the Buck circuit module of multiple parallel connections.The direct current energy that photovoltaic generating system exports is directly used in the direct currents electricity consumption such as electrolytic copper foil, electrolytic aluminium and plating enterprise by the present invention after less electrical energy transform part, be can be improved efficiency of energy utilization and is reduced enterprise's production cost.
Description
Technical field
The present invention relates to power system technologies fields, and in particular to one kind is used for light storage solution power-supply system and its controlling party
Method.
Background technique
With the quickening of social and economic development, global energy consumption is increasing, how to make full use of photovoltaic power generation
Equal clean energy resourcies and the transformation of electrical energy efficiency for improving electrical equipment are more and more important.Currently, electrolytic copper foil, electrolytic aluminium, plating etc.
There are multiple transformation of electrical energy links for the electrolysis power largely used in the production of enterprise, cause electrolysis power system to generate biggish
Transformation of electrical energy loss.In addition, the direct current energy of output is nearly all converted to AC energy by existing photovoltaic generating system at present
After be sent into power grid, then AC energy is converted into meeting the electrical energy form of oneself needs by electrical equipment again, due to have passed through
Multiple transformation of electrical energy links, energy conversion efficiency reduce, and efficiency of energy utilization is not high.
Summary of the invention
The present invention provides a kind of smooth storage solution power-supply system and its control method, the direct current that photovoltaic generating system is exported
The direct currents electricity consumption such as electrolytic copper foil, electrolytic aluminium and plating enterprise, Neng Gouti can be directly used in after less electrical energy transform part
High-energy source utilization efficiency and reduction enterprise's production cost.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
A kind of smooth storage solution power-supply system, comprising:
Photovoltaic generating system comprising photovoltaic battery array and Boost boost chopper, the photovoltaic battery array it is defeated
Outlet is connected with the input terminal of Boost boost chopper；
Energy-storage battery group comprising multiple series-parallel energy-storage battery units；
DC/DC current transformer comprising the Buck circuit module of multiple parallel connections.
Further, the output end of the Boost boost chopper passes sequentially through solid-state switch Q1 and solid-state switch Q2
It is connected with the positive and negative anodes of energy-storage battery group, the output end of the Boost boost chopper passes sequentially through solid-state switch Q1 and consolidates
State switch Q3 is connected with the high-pressure side positive and negative anodes of DC/DC current transformer, and the low pressure of the DC/DC current transformer flanks load R.
Preferably, the Buck circuit module uses Buck chopper.
It further, further include photovoltaic power generation control system and DC/DC converter control system, photovoltaic power generation control system
Unite for energy-storage battery group port voltage carry out stability contorting, the DC/DC converter control system for pair Buck
The output electric current of circuit module is controlled.
Preferably, the photovoltaic power generation control system is to the power switch V in Boost boost chopperPVOn-off into
Row control carries out stability contorting for the port voltage to energy-storage battery group.
Preferably, the DC/DC converter control system is to the power switch V in Buck circuit moduleiOn-off carry out
Control carries out stability contorting for the output electric current to Buck circuit module.
A kind of control method of smooth storage solution power-supply system, comprising:
Pass through power switch VPVOn-off, the output electricity of Boost boost chopper in stability contorting photovoltaic generating system
Pressure；
Pass through power switch ViOn-off, the output electric current of Buck circuit module in sharing control DC/DC current transformer.
Wherein, in stability contorting photovoltaic generating system Boost boost chopper output voltage, specifically:
The output voltage that real-time detection is arrivedWith given voltage reference value UdcCompare, is then obtained by PI controller
Power switch V in Boost boost chopper is generated through PWM modulator to control voltage U, control voltage UPVDriving signal.
Wherein, in sharing control DC/DC current transformer Buck circuit module output electric current, specifically:
The load total current that real-time detection is arrivedIt is respectively calculated according to Buck circuit module parallel connection quantity n, then
Using respectively calculated result as the current reference value of each Buck circuit moduleEach Buck circuit mould that real-time detection is arrived again
Block exports electric current II (i=1 ... n)With current reference valueCompare, electric current relative error obtains current control amount i by PI controller
’i, most generated afterwards through PWM modulator and drive power switch V in each Buck circuit moduleiDriving signal.
From the above technical scheme, light storage solution power-supply system of the present invention passes through DC/DC current transformer for photovoltaic power generation system
The direct current of system output is directly changed into the direct current energy for meeting the production requirements such as electrolytic copper foil, reduces transformation of electrical energy link and leads
The electric energy loss of cause；Meanwhile energy-storage battery group is maintained in photovoltaic power generation quantity surplus and deficiency by self-balancing charge and discharge system
Load supplying is stablized, and production efficiency is improved.
Detailed description of the invention
Fig. 1 is the topological structure schematic diagram of light storage solution power-supply system of the present invention；
Fig. 2 is the schematic diagram of photovoltaic power generation control system；
Fig. 3 is the schematic diagram of DC/DC converter control system.
Specific embodiment
A kind of preferred embodiment of the invention is described in detail with reference to the accompanying drawing.
As shown in Figure 1, the topological structure of light storage solution power-supply system includes photovoltaic generating system 1,2 and of energy-storage battery group
3 three parts of DC/DC current transformer, wherein energy-storage battery group is made of multiple series-parallel energy-storage battery units.
The photovoltaic generating system 1 includes photovoltaic battery array 11 and Boost boost chopper 12, the photovoltaic cell battle array
The output end of column is connected with the input terminal of Boost boost chopper.
The photovoltaic battery array 11 determines photovoltaic battery panel total quantity according to user installation total capacity, according to Boost liter
When battery group voltage rating determines every group of photovoltaic battery panel serial number, then root to the input-output voltage of pressure chopper circuit
Photovoltaic battery panel parallel connection group number is determined according to photovoltaic battery panel total capacity and every group of photovoltaic battery panel serial number.
The Boost boost chopper 12 is a kind of common switch DC booster circuit, by switching tube conducting and
Shutdown stores and releases energy to control inductance, to keep output voltage higher than input voltage, switching tube is used in the present embodiment
Power switch VPV。
The DC/DC current transformer 3 includes the Buck circuit module 31 of multiple parallel connections, and Buck circuit is a kind of common decompression
Formula translation circuit, by controlling power switch ViTurn-on and turn-off realize charge and discharge, Buck circuit module in the present embodiment
Using Buck chopper.The low pressure of the DC/DC current transformer, which flanks load R, load R, can be copper electrolysis cells, aluminium cell
The equal equipments of industrial product.
The output end of the Boost boost chopper 12 passes sequentially through solid-state switch Q1 and solid-state switch Q2 and energy storage electricity
The positive and negative anodes of pond group are connected, and the output end of the Boost boost chopper passes sequentially through solid-state switch Q1 and solid-state switch Q3
It is connected with the high-pressure side positive and negative anodes of DC/DC current transformer.When illumination condition meets photovoltaic cell capable of generating power requirement, power-supply system control
Device issues driving signal control solid-state switch Q1 conducting, carries out power supply for energy-storage battery group 2 and DC/DC current transformer 3 and prepares, otherwise
Solid-state switch Q1 is controlled to disconnect；When the production works starting such as copper foil electrolysis or aluminium electroloysis, power-supply system controller issues driving
Signal controls solid-state switch Q2 and solid-state switch Q3 conducting, and photovoltaic generating system 1 and energy-storage battery group 2 are DC/DC unsteady flow jointly
Device 3 is powered, and energy-storage battery group plays burning voltage and storage dump energy；From the safety of energy-storage battery group and service life
Angle consider, the end voltage high pressure voltage rating 10% of energy-storage battery group 1 or lower than when voltage rating 70% when, power-supply system control
Device processed issues the driving signal control end solid-state switch Q3 and opens.
The present invention can also be by control system to power switch VPVWith power switch ViOn-off be adjusted, to mention
For stable supply voltage.
Control system includes photovoltaic power generation control system and DC/DC converter control system, the photovoltaic power generation control system
The output voltage reference value of Boost boost chopper is calculated using maximal power tracing algorithm, if the output voltage is joined
When examining value greater than energy-storage battery group maximum charging voltage, using energy-storage battery group maximum charging voltage as Boost boost chopper electricity
The final output voltage reference value on roadOtherwise, output voltage reference value maximal power tracing algorithm being calculated as
The final output voltage reference value of Boost boost chopperThen according to energy-storage battery group port voltage and Boost liter
Press the final output voltage reference value of chopper circuitDeviation, generate power switch V by PI controller and PWM modulatorPV
Control signal, to maintain energy-storage battery group port voltage stable and guarantee energy-storage battery group safety.The DC/DC current transformer control
System processed is according to load total currentWith Buck circuit module parallel connection quantity n, each Buck electricity is obtained after equalization calculates
The output current reference value of road moduleThe output current reference value of each Buck circuit moduleIt is obtained with real-time detection
After Buck circuit module exports electric current relatively, the power for Buck circuit module is generated by PI controller and PWM modulator
Switching device ViDriving signal, realize Buck circuit module output electric current accurate control.
The photovoltaic power generation control system passes through control power switch VPVOn-off realize Boost boost chopper output
The stability contorting of voltage provides burning voltage for energy-storage battery group and DC/DC current transformer.Boost boost chopper is to energy storage
The charging of battery pack uses self-balancing mode, because Boost boost chopper output voltage is constant, when under energy-storage battery group voltage
It drops Shi Zeke and charging process is naturally done by Boost boost chopper.DC/DC converter control system is by controlling each Buck
Device for power switching V in circuit moduleiOn-off realize output electric current sharing control.
The present invention also provides a kind of control methods of smooth storage solution power-supply system, comprising:
Pass through power switch VPVOn-off, the output electricity of Boost boost chopper in stability contorting photovoltaic generating system
Pressure；Pass through power switch ViOn-off, the output electric current of Buck circuit module in sharing control DC/DC current transformer.
As shown in Fig. 2, in stability contorting photovoltaic generating system Boost boost chopper output voltage control method,
Specifically:
The output voltage that real-time detection is arrivedWith given voltage reference value UdcCompare, is then obtained by PI controller
Power switch V in Boost boost chopper is generated through PWM modulator to control voltage U, control voltage UPVDriving signal.
As shown in figure 3, in sharing control DC/DC current transformer Buck circuit module output current control method, specifically:
The load total current that real-time detection is arrivedIt is respectively calculated according to Buck circuit module parallel connection quantity n, then
Using respectively calculated result as the current reference value of each Buck circuit moduleEach Buck circuit mould that real-time detection is arrived again
Block exports electric current II (i=1 ... n)With current reference valueCompare, electric current relative error obtains current control amount i ' by PI controlleri,
Last current control amount i 'iPower switch V in each Buck circuit module is generated through PWM modulatoriDriving signal, the driving letter
Number duty ratio adjusted in real time by PI controller, then the output voltage of each Buck circuit module can by PI controller realize essence
Really control, when the output electric current and current reference value of each Buck circuit moduleWhen being consistent, DC/DC current transformer it is total defeated
Electric current can reach control and require out, realize the control of modularization high current.
Embodiment described above is only that preferred embodiments of the present invention will be described, not to model of the invention
It encloses and is defined, without departing from the spirit of the design of the present invention, those of ordinary skill in the art are to technical side of the invention
The various changes and improvements that case is made, should fall within the scope of protection determined by the claims of the present invention.
Claims (10)
1. a kind of smooth storage solution power-supply system characterized by comprising
Photovoltaic generating system comprising photovoltaic battery array and Boost boost chopper, the output end of the photovoltaic battery array
It is connected with the input terminal of Boost boost chopper；
Energy-storage battery group comprising multiple series-parallel energy-storage battery units；
DC/DC current transformer comprising the Buck circuit module of multiple parallel connections.
2. smooth storage solution power-supply system according to claim 1, which is characterized in that the Boost boost chopper
Output end passes sequentially through solid-state switch Q1 and solid-state switch Q2 is connected with the positive and negative anodes of energy-storage battery group, and the Boost boosting is cut
The output end of wave circuit passes sequentially through solid-state switch Q1 and solid-state switch Q3 and is connected with the high-pressure side positive and negative anodes of DC/DC current transformer,
The low pressure of the DC/DC current transformer flanks load R.
3. smooth storage solution power-supply system according to claim 1, which is characterized in that the Buck circuit module uses Buck
Chopper.
4. smooth storage solution power-supply system according to claim 1, which is characterized in that further include photovoltaic power generation control system and
DC/DC converter control system, the photovoltaic power generation control system are used to carry out stability contorting to the port voltage of energy-storage battery group,
The DC/DC converter control system for pair the output electric current of Buck circuit module control.
5. smooth storage solution power-supply system according to claim 4, which is characterized in that the photovoltaic power generation control system pair
Power switch V in Boost boost chopperPVOn-off controlled, for energy-storage battery group port voltage carry out
Stability contorting.
6. smooth storage solution power-supply system according to claim 4, which is characterized in that the DC/DC converter control system
To the power switch V in Buck circuit moduleiOn-off controlled, carried out for the output electric current to Buck circuit module steady
Fixed control.
7. a kind of control method of the light storage solution power-supply system as described in claim any one of 1-6 characterized by comprising
Pass through power switch VPVOn-off, the output voltage of Boost boost chopper in stability contorting photovoltaic generating system；
Pass through power switch ViOn-off, the output electric current of Buck circuit module in sharing control DC/DC current transformer.
8. control method according to claim 7, which is characterized in that Boost boosts in stability contorting photovoltaic generating system
The output voltage of chopper circuit, specifically:
The output voltage that real-time detection is arrivedWith given voltage reference value UdcCompare, is then controlled by PI controller
Voltage U processed, control voltage U generate power switch V in Boost boost chopper through PWM modulatorPVDriving signal.
9. control method according to claim 7, which is characterized in that Buck circuit mould in sharing control DC/DC current transformer
The output electric current of block, specifically:
The load total current that real-time detection is arrivedIt is respectively calculated according to Buck circuit module parallel connection quantity n, then will be divided equally
Current reference value of the calculated result as each Buck circuit moduleEach Buck circuit module that real-time detection is arrived again exports
Electric current II (i=1 ... n)With current reference valueCompare, electric current relative error obtains current control amount i ' by PI controlleri, finally
It is generated through PWM modulator and drives power switch V in each Buck circuit moduleiDriving signal.
10. control method according to claim 7, which is characterized in that charging of the Boost circuit to energy-storage battery group
Using self-balancing mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910244950.1A CN109995127B (en) | 2019-03-28 | 2019-03-28 | Light storage electrolytic power supply system and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910244950.1A CN109995127B (en) | 2019-03-28 | 2019-03-28 | Light storage electrolytic power supply system and control method thereof |
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| CN109995127A true CN109995127A (en) | 2019-07-09 |
| CN109995127B CN109995127B (en) | 2022-06-21 |
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Cited By (1)
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