CN110445178A - A kind of distribution roof photovoltaic power generation intelligent energy storage system - Google Patents
A kind of distribution roof photovoltaic power generation intelligent energy storage system Download PDFInfo
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- CN110445178A CN110445178A CN201910803650.2A CN201910803650A CN110445178A CN 110445178 A CN110445178 A CN 110445178A CN 201910803650 A CN201910803650 A CN 201910803650A CN 110445178 A CN110445178 A CN 110445178A
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- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/627—Stationary installations, e.g. power plant buffering or backup power supplies
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- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
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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
-
- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Abstract
The invention discloses a kind of distributed roof photovoltaic power generation intelligent energy storage systems, comprising: photovoltaic generating module is stored for generating direct current energy, and by direct current energy to energy-storage module；Energy-storage module is connect with photovoltaic generating module, is sent to Intelligent management module for storing direct current energy, and by the parameter information of direct current energy；Intelligent management module is connect with energy-storage module, for generating control signal according to the parameter information of direct current energy, and sends control signals to unsteady flow module；Unsteady flow module, connect with Intelligent management module and energy-storage module, for direct current energy to be converted to AC energy according to control signal, or the AC energy in power grid is converted to direct current energy.System proposed by the present invention solves conventional photovoltaic energy-storage system when accessing operation of power networks, and the unbalanced power of appearance, the problems such as stability and power quality are poor ensure that the stability of output power, realize the stable operation of distributed photovoltaic power generation.
Description
Technical field
The present invention relates to technical field of energy storage, in particular to a kind of distributed roof photovoltaic power generation intelligent energy storage system.
Background technique
With the growing tension of traditional energy and the protrusion of environmental problem, renewable energy is got growing concern for,
Renewable energy especially wind-power electricity generation and photovoltaic power generation in China's is rapidly developed, and distributed photovoltaic and wind-powered electricity generation are its important sets
At part.In east China area, distributed power generation is comparatively fast developed, however, renewable energy power generation is by weather condition
Influence that there is greatly uncertainty, intermittent and fluctuation brings new challenge to power grid, such as voltage, the influence of frequency
The problems such as, energy storage technology is that these problems bring a kind of effective solution.
With the development of distributed generation resource and power grid, photovoltaic energy storage system ratio shared in power grid is also more come
It is high.But independent photovoltaic energy storage system has the shortcomings that randomness and fluctuation, and when accessing operation of power networks, there are power injustice
Weighing apparatus, the problems such as stability and power quality are poor, when its in network system in use, the safety and stability fortune of power grid will be influenced
Row.
Summary of the invention
The present invention provides a kind of distributed roof photovoltaic power generation intelligent energy storage systems, exist in the prior art to solve
The problem of.
A kind of distributed roof photovoltaic power generation intelligent energy storage system provided by the invention, comprising:
Photovoltaic generating module generates direct current energy for carrying out photovoltaic power generation, and the direct current energy is stored to energy storage
Module；
Energy-storage module is connect with the photovoltaic generating module, for storing the direct current energy, and by the direct current energy
Parameter information be sent to Intelligent management module；
Intelligent management module is connect with the energy-storage module, is controlled for being generated according to the parameter information of the direct current energy
Signal processed, and the control signal is sent to unsteady flow module；
Unsteady flow module is connect with the Intelligent management module and the energy-storage module, and being used for will according to the control signal
The direct current energy is converted to AC energy, to be connected to the grid, or the AC energy in power grid is converted to direct current energy and is stored
To the energy-storage module.
In one embodiment of the invention, the photovoltaic generating module includes: solar battery group, rectification unit and straight
Flow power distribution cabinet；
The solar battery group, for converting solar energy into direct current energy and storing to the rectification unit；
The rectification unit is connect with the solar battery group, for the balanced direct current energy；
The DC power distribution cabinet is connect with the rectification unit, for controlling the direct current energy driving loaded work piece.
In one embodiment of the invention, the energy-storage module includes: energy storage battery group, and the package energy storage
The radiator of battery group；
The radiator includes fixed plate and multiple cooling fins, and the cooling fin is welded and fixed with the fixed plate, and
The cooling fin is bonded the energy storage battery group；
The cooling fin is layer structure, including substrate and graphite ene coatings made of being stacked with；
The substrate is heat-conducting plastic；
The graphite ene coatings are graphene heat-conducting silicone grease.
In one embodiment of the invention, the Intelligent management module includes: electrical energy parameter collector, data processor
The controller being connected with data processor；
The electrical energy parameter collector, for acquiring the parameter information of the direct current energy；The direct current energy parameter letter
Breath includes load voltage, load current or bearing power；
The data processor, for generating the control signal according to the parameter information of the direct current energy；Institute
Stating control signal includes that direct current turns AC signal or exchange to turn direct current signal；
The controller is converted to direct current energy for turning the AC signal control unsteady flow module according to the direct current
AC energy is connected to the grid, or turns the direct current signal control unsteady flow module according to the exchange and AC energy is converted to direct current
Electric energy.
In one embodiment of the invention, the unsteady flow module includes:
DC filtering circuit is connect with the energy-storage module, for reducing the common mode interference of the direct current energy；
Booster circuit, and the DC filtering circuit connection, for improving the voltage of the direct current energy；
CL filter circuit is connect with the booster circuit, for filtering out the radio-frequency component in the direct current energy；
Conversion circuit is connect with the CL filter circuit and the Intelligent management module, for according to the intelligent management
Direct current energy is converted to AC energy and is connected to the grid by the control signal that module is sent, or the AC energy in power grid is converted to
Direct current energy is stored to the energy-storage module；
LCL filter circuit is connect with the conversion circuit, for reducing the high-frequency harmonic in the AC energy；
Ac filter circuit is connect, for inhibiting the High-frequency Interference in the AC energy with the LCL filter circuit.
In one embodiment of the invention, the DC filtering circuit includes: first capacitor C1, the second capacitor C2,
Three capacitor C3, the 4th capacitor C4, the 5th capacitor C5, the 6th capacitor C6, the 7th capacitor C7, the 8th capacitor C8, the 9th capacitor C9, the
One diode D1, the second diode D2, third diode D3 and the 4th diode D4, the first inductance L1；
Wherein, one end ground connection of first capacitor C1, the other end are connecting one end of the second capacitor C2, first diode D1 just
Pole, one end of third capacitor C3, the anode of third diode D3, one end of the 6th capacitor C6, one end of the 7th capacitor C7, the 8th
One end of one end of capacitor C8 and the 9th capacitor C9；The cathode of the other end connection first diode D1 of second capacitor C2, the 4th
The anode of one end of capacitor C4 and the second diode D2；The cathode of the other end connection third diode D3 of third capacitor C3, the
One end of five capacitor C5 and the anode of the 4th diode D4；The other end of 4th capacitor C4, the cathode of the second capacitor D2, the 5th electricity
Hold the other end of C5, the cathode of the 4th diode D4 is all connected with one end of the first inductance L1, the other end of the 6th capacitor C6 and the
The other end of seven capacitor C7；The other end of first inductance L1 be connected to the 8th capacitor C8 the other end and the 9th capacitor C9 it is another
End.
In one embodiment of the invention, the booster circuit includes: relay KA1, the second inductance L2, third inductance
L3, diode D5, diode D6, switching tube K1 and switching tube K2；
Wherein, one end of relay KA1 connects the cathode output end of the DC filtering circuit, the second electricity of other end connection
Feel one end of L2, the other end of the second inductance L2 is connect with one end of the anode of diode D5 and switching tube K1 respectively, diode
The cathode of D5 is the positive output end of the booster circuit, and the other end of switching tube K1 is the zero-output terminal of the booster circuit；The
One end of three inductance L3 connects the cathode output end of the DC filtering circuit, the other end of third inductance L3 respectively with diode
The cathode of D6 is connected with one end of switching tube K1, and the cathode of diode D5 is the negative output terminal of the booster circuit, switching tube K2
The other end be the booster circuit zero-output terminal.
In one embodiment of the invention, the ac filter circuit includes: the tenth capacitor C10, the 4th inductance L4,
Five inductance L5, wherein one end of the tenth capacitor C10 is connect with one end of the 4th inductance L4, and connecting node is described
One end of ac filter circuit；The other end of the tenth capacitor C10 is connect with one end of the 5th inductance L5, connecting node
For the other end of the ac filter circuit；The other end of the 4th inductance L4, the other end of the 5th inductance L5 connect power grid.
In one embodiment of the invention, the Intelligent management module is generated according to the parameter information of the direct current energy
It controls signal and executes following steps:
Step A1, the parameter information and the photovoltaic generating module of the direct current energy that the energy-storage module is sent are obtained
Output voltage exports electric current according to the saturation that the output voltage of photovoltaic generating module calculates the energy-storage module；
Wherein, I is saturation output electric current, and Ig is electric current caused by photovoltaic generating module, and Vg is photovoltaic generating module
Output voltage, Rc are the series resistance of default photovoltaic generating module, RlFor the saturation resistance for presetting photovoltaic generating module, Ib is light
The saturation current of electricity generation module is lied prostrate, q is preset electron charge value, and β is default Boltzmann constant, and α is default diode system
Number, T are Current Temperatures, and T1 is standard Kelvin degree Celsius, and the temperature coefficient of electric current, T0 preset standard temperature are when θ is short circuit
Area in photovoltaic generating module for the fixed plate of power generation, Sfs are default solar irradiation intensity；
Step A2, the saturation output voltage of the energy-storage module is calculated；
Wherein, V is the saturation output voltage of energy-storage module；
Step A3, the intensity of solar radiation for monitoring photovoltaic generating module present position, the photovoltaic power generation mould are obtained
The temperature of the solar panel of block, and obtain the temperature coefficient of the solar panel of the photovoltaic generating module, and with institute
The photovoltaic power generation mould is calculated in the saturation output electric current of the saturation output voltage, the energy-storage module of stating energy-storage module jointly
The equal power of block；
Wherein, P is the equal power of photovoltaic generating module, and Sin is that the solar radiation of photovoltaic generating module present position is strong
Degree, L are the temperature coefficient of the solar panel of photovoltaic generating module, and Tb is the temperature of the solar panel of photovoltaic generating module
Degree；
Step A4, judge whether the equal power P of the photovoltaic generating module is greater than preset bearing power, if more than then
The control signal that direct current energy is converted to AC energy is generated, and the power converted subtracts bearing power into P, if equal power
P is less than preset bearing power, then generates the signal that the AC energy in power grid is converted to direct current energy, and the power converted
P is subtracted for bearing power.
Some beneficial effects of the invention may include:
A kind of distributed roof photovoltaic power generation intelligent energy storage system provided by the invention, using Intelligent management module according to adopting
Direct current energy is converted to AC energy and is connected to the grid by the parameter information control of the direct current energy collected, or by the exchange in power grid
Electric energy is converted to direct current energy and stores to the energy-storage module for load use, solves conventional photovoltaic energy-storage system in access power grid
When operation, the unbalanced power of appearance, the problems such as stability and power quality are poor ensure that the stability of output power, real
The stable operation of distributed photovoltaic power generation is showed；In addition, connecing energy-storage system in user side, it can both network and transport with bulk power grid
Row, and independent operating, flexibility with higher and schedulability can be disconnected with bulk power grid.
Other features and advantages of the present invention will illustrate in specification, also, partly become from specification aobvious
And it is clear to, or understand through the implementation of the invention.The objectives and other advantages of the invention can be by written specification, power
Specifically noted structure is achieved and obtained in sharp claim and attached drawing.
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.In the accompanying drawings:
Fig. 1 is a kind of structural schematic diagram of distributed roof photovoltaic power generation intelligent energy storage system in the embodiment of the present invention；
Fig. 2 is the direct current of unsteady flow module in a kind of distribution roof photovoltaic power generation intelligent energy storage system in the embodiment of the present invention
The structural schematic diagram of filter circuit；
Fig. 3 is the boosting of unsteady flow module in a kind of distribution roof photovoltaic power generation intelligent energy storage system in the embodiment of the present invention
The structural schematic diagram of circuit；
Fig. 4 is the exchange of unsteady flow module in a kind of distribution roof photovoltaic power generation intelligent energy storage system in the embodiment of the present invention
The structural schematic diagram of filter circuit.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
Fig. 1 is a kind of structural schematic diagram of distributed roof photovoltaic power generation intelligent energy storage system in the embodiment of the present invention.Such as
Shown in Fig. 1, a kind of distributed roof photovoltaic power generation intelligent energy storage system provided by the invention, comprising:
Photovoltaic generating module generates direct current energy for carrying out photovoltaic power generation, and the direct current energy is stored to energy storage
Module；
Energy-storage module connects the photovoltaic generating module, for storing the direct current energy, and by the direct current energy
Parameter information is sent to Intelligent management module；
Intelligent management module connects the energy-storage module, controls for being generated according to the parameter information of the direct current energy
Signal is sent to unsteady flow module；
Unsteady flow module connects the Intelligent management module and the energy-storage module, and being used for will be straight according to the control signal
Galvanic electricity can be converted to AC energy and be connected to the grid, or the AC energy in power grid is converted to direct current energy and is stored to the energy storage
Module.
Specifically, in order to overcome existing photovoltaic energy storage system, when accessing operation of power networks, there are unbalanced power, surely
The qualitative and poor problem of power quality, the embodiment of the invention provides a kind of distributed roof photovoltaic power generation intelligence energy storage systems
System carries out photovoltaic power generation using photovoltaic generating module and generates direct current energy, and the direct current energy is stored to energy-storage module；Storage
Energy module, connects the photovoltaic generating module, sends out for storing the direct current energy, and by the parameter information of the direct current energy
It send to Intelligent management module；Intelligent management module connects the energy-storage module, for the parameter information according to the direct current energy
It generates control signal and is sent to unsteady flow module；Unsteady flow module connects the Intelligent management module and the energy-storage module, is used for root
Direct current energy is converted to AC energy according to the control signal to be connected to the grid, or the AC energy in power grid is converted into direct current
Power storage is to the energy-storage module.It will be straight according to the control of the parameter information of collected direct current energy using Intelligent management module
Galvanic electricity can be converted to AC energy and be connected to the grid, or the AC energy in power grid is converted to direct current energy and is stored to the energy storage
Module is used for load, solves conventional photovoltaic energy-storage system when accessing operation of power networks, the unbalanced power of appearance, stability and
The problems such as power quality is poor ensure that the stability of output power, realize the stable operation of distributed photovoltaic power generation；Separately
Outside, energy-storage system is connect in user side, not only can with bulk power grid networking operation, but also can with bulk power grid disconnect independent operating, tool
There are higher flexibility and schedulability.
In a specific embodiment, the photovoltaic generating module includes: solar battery group, rectification unit and straight
Flow power distribution cabinet；
The solar battery group, for converting solar energy into direct current energy and storing to the rectification unit；
The rectification unit connects the solar battery group, for the balanced direct current energy；
The DC power distribution cabinet connects the rectification unit, for controlling the direct current energy driving loaded work piece.
Specifically, photovoltaic generating module includes: solar battery group, for converting solar energy into direct current energy and storing
To the rectification unit；Solar battery group may be selected monocrystalline silicon, polysilicon or film battery assembly, solar battery group according to
Voltage and power requirement select suitable capacity, are connected in series or parallel, and include necessity of conventional solar power system
Control equipment；Rectification unit connects the solar battery group, for the balanced direct current energy；Rectification unit is to solar-electricity
The direct current energy that pond group generates is rectified and is stored, use when for loading or access power grid；DC power distribution cabinet, described in connection
Rectification unit, for controlling the direct current energy driving loaded work piece.
In a specific embodiment, the energy-storage module includes: energy storage battery group, and the package energy storage
The radiator of battery group；
The radiator includes fixed plate and multiple cooling fins, and the cooling fin is welded and fixed with the fixed plate, and
The cooling fin is bonded the energy storage battery group；
The cooling fin is layer structure, including substrate and graphite ene coatings made of being stacked with；
The substrate is heat-conducting plastic；
The graphite ene coatings are graphene heat-conducting silicone grease.
Specifically, radiator includes fixed plate and multiple cooling fins, and cooling fin welding is welded and fixed with fixed plate, and dissipates
Backing is bonded energy storage battery group.Cooling fin is that layer structure includes being located at substrate and graphite ene coatings；Substrate is heat-conducting plastic,
Graphite ene coatings are graphene heat-conducting silicone grease.Fixed plate selects metal material, and the aluminium of good heat dispersion performance is selected in the present embodiment
Sheet alloy.Graphene has many advantages, such as high thermal conductivity, high intensity, high-specific surface area, and thermal conductivity is up to 5300W.m-1.K-
1；Graphene heat-conducting silicone grease is as heat conducting coating, and excellent thermal conductivity, lamella is thin, easily disperses, and easy processing substantially increases heat dissipation
The working performance of device；The waste heat discharged when energy storage battery group being charged and discharged rapidly, which is spread apart, to be come, and energy storage is reduced
The operating temperature of battery group.
In a specific embodiment, the Intelligent management module includes: electrical energy parameter collector, data processor
The controller being connected with data processor；
The energy harvester, for acquiring the parameter information of the direct current energy；The direct current energy parameter information packet
Include load voltage, load current or bearing power；
Data processor, for generating control signal according to the parameter information of the direct current energy；The control signal packet
Direct current is included to turn AC signal or exchange to turn direct current signal；
Direct current energy is converted to exchange for turning the AC signal control unsteady flow module according to the direct current by controller
Electric energy is connected to the grid, or turns the direct current signal control unsteady flow module according to the exchange and AC energy is converted to direct current
Energy.
Specifically, Intelligent management module includes: electrical energy parameter collector, data processor and controller；Wherein, electric energy is joined
Number collector accesses energy-storage module, is acquired for the parameter information to the direct current energy stored in energy-storage module, described straight
Galvanic electricity energy parameter information includes load voltage, load current or bearing power；After collecting the parameter of direct current energy, at data
Reason device above-mentioned parameter is compared, handle obtain current time should be obtained from power grid electric energy for load use, still answer
It is used when accessing the electric energy stored in energy-storage module in power grid, controller is fed back in the form of controlling signal；The control
Signal includes that direct current turns AC signal or exchange to turn direct current signal；Controller upon the reception of control signals, controls the unsteady flow
Direct current energy is converted to AC energy and is connected to the grid by module, or is turned direct current signal according to the exchange and controlled the unsteady flow module
AC energy is converted into direct current energy.And then realize that electric energy power is steady, the stability and electric energy of entire photovoltaic energy storage system
Quality gets a promotion.
In a specific embodiment, the unsteady flow module includes:
DC filtering circuit connects the energy-storage module, for reducing the common mode interference of the direct current energy；
Booster circuit connects the DC filtering circuit, for improving the voltage of the direct current energy；
CL filter circuit connects the booster circuit, for filtering out the radio-frequency component in the direct current energy；
Conversion circuit connects the CL filter circuit and the Intelligent management module, for according to the intelligent management mould
Direct current energy is converted to AC energy and is connected to the grid by the control signal that block is sent, or the AC energy in power grid is converted to directly
Power storage is flowed to the energy-storage module；
LCL filter circuit connects the conversion circuit, for reducing the high-frequency harmonic in the AC energy；
Ac filter circuit connects the LCL filter circuit, for inhibiting the High-frequency Interference in the AC energy.
Specifically, the main circuit of unsteady flow module is DC/AC conversion circuit and DC/DC DC voltage booster circuit.DC/AC conversion electricity
Single three phase full bridge IGBT conversion circuit composition, exchange side connection power grid or transformer are routed, DC side connects DC/DC boosting electricity
The high-pressure side on road.The low-pressure side of DC/DC booster circuit connects energy storage battery group.It is equipped in the exchange side of DC/AC conversion circuit
Ac filter circuit exchanges electromagnetic interface filter, for inhibiting the High-frequency Interference in AC energy；In the low of DC/DC booster circuit
Side is pressed to be equipped with DC filtering circuit, that is, direct current electromagnetic interface filter, for reducing the DC common-mode interference of energy storage battery group generation.In
The high-pressure side of DC/DC booster circuit is equipped with CL filter circuit, that is, CL filter, can filter out the high frequency in DC current, guarantees defeated
The stabilization of electric current and voltage out；It also is provided with CL filter in DC/AC conversion circuit DC side, when can charge with energy storage battery group
The high frequency in DC current that DC/AC conversion circuit generates, to improve the service life of energy storage battery group；Electricity is converted in DC/AC
The every phase in exchange side on road connects a LCL filter, and every group of LCL filter shares one group of capacitor and one group of inductance, can drop
Low exchange side high-frequency harmonic electric current, while reducing the interference of the unstable parameter of power grid.
Voltage sampling circuit is equipped in the low-pressure side of DC/DC booster circuit and the river outlet of low-pressure side；It boosts in DC/DC electric
The on high-tension side river outlet in road is equipped with current sampling circuit.Voltage, current sample electricity also are provided in the DC side of DC/AC conversion circuit
Road；Voltage sampling circuit is equipped in the exchange side of DC/AC conversion circuit；Meanwhile current sample is equipped in every road IGBT circuit
Circuit.The above sample circuit is for realizing mutual between photovoltaic generating module, energy-storage module, Intelligent management module and unsteady flow module
Connection, to guarantee the stable operation of energy-storage module and unsteady flow module.
The LCL filter of exchange side can substantially reduce exchange side high-frequency harmonic, while can also reduce the shakiness of power grid
The influence for determining factor improves the stability of equipment.Exchange side electromagnetic interface filter can not only inhibit the High-frequency Interference pair in power grid
The influence of equipment can also inhibit interference of the equipment to power grid.DC side CL filter can filter out the high frequency in DC current
Ingredient reduces the ripple of output electric current and voltage, improves the service life of energy-storage battery.DC side electromagnetic interface filter can reduce direct current
The common mode interference of side improves the stability of equipment.
As shown in Fig. 2, in a specific embodiment, the DC filtering circuit includes: first capacitor C1, second
Capacitor C2, third capacitor C3, the 4th capacitor C4, the 5th capacitor C5, the 6th capacitor C6, the 7th capacitor C7, the 8th capacitor C8, the 9th
Capacitor C9, first diode D1, the second diode D2, third diode D3 and the 4th diode D4, the first inductance L1；
Wherein, one end ground connection of first capacitor C1, the other end are connecting one end of the second capacitor C2, first diode D1 just
Pole, one end of third capacitor C3, the anode of third diode D3, one end of the 6th capacitor C6, one end of the 7th capacitor C7, the 8th
One end of one end of capacitor C8 and the 9th capacitor C9；Other end connection first diode D1 cathode, the 4th electricity of second capacitor C2
Hold one end of C4 and the anode of the second diode D2；The cathode of the other end connection third diode D3 of third capacitor C3, the 5th
The anode of one end of capacitor C5 and the 4th diode D4；The other end of 4th capacitor C4, the cathode of the second capacitor D2, the 5th capacitor
The other end of C5, the 4th diode D4 cathode be all connected with the other end and the 7th of one end of the first inductance L1, the 6th capacitor C6
The other end of capacitor C7；The other end of first inductance L1 be connected to the 8th capacitor C8 the other end and the 9th capacitor C9 it is another
End.
The common mode interference of direct current energy can be effectively reduced using above-mentioned DC filtering circuit, common mode interference refers to doing
Disturb that amplitude of the voltage on signal wire and its loop line is identical, voltage here is done using any one object nearby as reference potential
Disturbing current loop then is flowed in the circuit that conducting wire is constituted with Reference.Unsteady flow module in this energy-storage system can be eliminated
Power supply line, the common mode interference on signal wire, poor film interference, electrostatic interference etc., the DC filtering circuit especially added in circuit
The common mode interference problem between power supply and place of working can be eliminated, so that signal is no longer distorted, reaches common mode interference signal inhibition
Purpose, the reading of normal switching signal will not be interfered because of common mode interference signal, eliminates security risk.
As shown in figure 3, in a specific embodiment, the booster circuit includes: relay KA1, the second inductance
L2, third inductance L3, diode D5, diode D6, switching tube K1 and switching tube K2；
Wherein, one end of relay KA1 connects the cathode output end of the DC filtering circuit, the second electricity of other end connection
Feel one end of L2, the other end of the second inductance L2 is connect with one end of the anode of diode D5 and switching tube K1 respectively, diode
The cathode of D5 is the positive output end of the booster circuit, and the other end of switching tube K1 is the zero-output terminal of the booster circuit；The
One end of three inductance L3 connects the cathode output end of the DC filtering circuit, the other end of third inductance L3 respectively with diode
The cathode of D6 is connected with one end of switching tube K1, and the cathode of diode D5 is the negative output terminal of the booster circuit, switching tube K2
The other end be the booster circuit zero-output terminal.
Using above-mentioned booster circuit, voltage prosperity can lead the presence because of impedance after access load rapidly
The pressure drop of the output voltage of the DC voltage booster circuit of cause compensates, and guarantees that the voltage quasi position of output voltage is stablized；Using opening the light
The voltage output end of the booster circuit is thoroughly turned off, the no-load consumption of rear end component is avoided and can not thoroughly be closed
The disconnected defect that risk is damaged to rear end component, realizes high power and efficient dc voltage boost, extends circuit
Use the time, and circuit structure is simple, it is easy to accomplish.As shown in figure 4, in a specific embodiment, the exchange
Filter circuit includes: the tenth capacitor C10, the 4th inductance L4, the 5th inductance L5, wherein one end of the tenth capacitor C10 and institute
One end connection of the 4th inductance L4 is stated, connecting node is one end of the ac filter circuit；The tenth capacitor C10's is another
End is connect with one end of the 5th inductance L5, and connecting node is the other end of the ac filter circuit；4th inductance
The other end connection power grid of the other end of L4, the 5th inductance L5.
Using above-mentioned ac filter circuit can it is simple with circuit structure, control is easy, design is easy, net side power factor
Height, alternating voltage is steady, good to electromagnetic interference inhibitory effect, while can inhibit the High-frequency Interference in the AC energy, increases
The safety of frequency converter equipment is added, has also made the working powers at different levels of frequency converter more clean, stable, ensure that input power
Clean and safety.
In a specific embodiment, the Intelligent management module is generated according to the parameter information of the direct current energy
It controls signal and executes following steps:
Step A1, the parameter information and the photovoltaic generating module of the direct current energy that the energy-storage module is sent are obtained
Output voltage exports electric current according to the saturation that the output voltage of photovoltaic generating module calculates the energy-storage module；
Wherein, I is saturation output electric current, and Ig is electric current caused by photovoltaic generating module, and Vg is photovoltaic generating module
Output voltage, Rc are the series resistance of default photovoltaic generating module, RlFor the saturation resistance for presetting photovoltaic generating module, Ib is light
The saturation current of electricity generation module is lied prostrate, q is preset electron charge value, and β is default Boltzmann constant, and α is default diode system
Number, T are Current Temperatures, and T1 is standard Kelvin degree Celsius, and the temperature coefficient of electric current, T0 preset standard temperature are when θ is short circuit
Area in photovoltaic generating module for the fixed plate of power generation, Sfs are default solar irradiation intensity；
Wherein, the Rc be generally preset as 0 or close to 0 number, RlIt generally presets infinity or one great
Number, q are generally preset as 1.6*10-19C, β are generally preset as 1.38*10-23J/K, α are generally preset as 1.3, T1 273K, and T0 is
25 °, Sfs is generally preset as 103W/m2；
Step A2, the saturation output voltage of the energy-storage module is calculated；
Wherein, V is the saturation output voltage of energy-storage module；
Step A3, the intensity of solar radiation for monitoring photovoltaic generating module present position, the photovoltaic power generation mould are obtained
The temperature of the solar panel of block, and obtain the temperature coefficient of the solar panel of the photovoltaic generating module, and with institute
The photovoltaic power generation mould is calculated in the saturation output electric current of the saturation output voltage, the energy-storage module of stating energy-storage module jointly
The equal power of block；
Wherein, P is the equal power of photovoltaic generating module, and Sin is that the solar radiation of photovoltaic generating module present position is strong
Degree, L are the temperature coefficient of the solar panel of photovoltaic generating module, and Tb is the temperature of the solar panel of photovoltaic generating module
Degree；
Step A4, judge whether the equal power P of the photovoltaic generating module is greater than preset bearing power, if more than then
The control signal that direct current energy is converted to AC energy is generated, and the power converted subtracts bearing power into P, if equal power
P is less than preset bearing power, then generates the signal that the AC energy in power grid is converted to direct current energy, and the power converted
P is subtracted for bearing power.
During photovoltaic power generation, the optimal operating point of photovoltaic energy storage system is that output power is equal with bearing power,
So in actual application, obtaining the equal power of photovoltaic generating module in real time by above-mentioned technology, and judge the light
The relationship between the equal power and preset bearing power of electricity generation module is lied prostrate, so that the control of intelligence is to convert direct current energy
It is AC energy or AC energy is converted into direct current energy, so that the output power is always fixed power, and solid
It is set to bearing power, to improve the power-balance and stability of the photovoltaic energy storage system, and is able to maintain best operating point.
System specific work process proposed by the present invention is as follows:
Photovoltaic generating module uses solar energy for power generation generation direct current energy, by the rectification list of photovoltaic generating module
The sun can be carried out integration, then exported by DC power distribution cabinet to load by member, use for load；When the electricity consumption of load is abundant
When, then extra direct current energy is stored in energy-storage module, is stored by the battery group in energy-storage module, utilized
Radiator around battery group can extend the service life of battery group；Intelligent management module is obtained from battery group
The parameter information of direct current energy, and judge that the current state of energy-storage module generates corresponding control signal and gives unsteady flow module, unsteady flow
Direct current energy is converted to AC energy according to the control signal upon the reception of control signals and is connected to the grid by module, or will be electric
AC energy in net is converted to direct current energy and stores the intelligent storage for realizing electric energy to the energy-storage module and use.
A kind of distributed roof photovoltaic power generation intelligent energy storage system provided by the invention, using Intelligent management module according to adopting
Direct current energy is converted to AC energy and is connected to the grid by the parameter information control of the direct current energy collected, or by the exchange in power grid
Electric energy is converted to direct current energy and stores to the energy-storage module for load use, solves conventional photovoltaic energy-storage system in access power grid
When operation, the unbalanced power of appearance, the problems such as stability and power quality are poor ensure that the stability of output power, real
The stable operation of distributed photovoltaic power generation is showed；In addition, connecing energy-storage system in user side, it can both network and transport with bulk power grid
Row, and independent operating, flexibility with higher and schedulability can be disconnected with bulk power grid.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (9)
1. a kind of distribution roof photovoltaic power generation intelligent energy storage system characterized by comprising
Photovoltaic generating module generates direct current energy for carrying out photovoltaic power generation, and the direct current energy is stored to energy-storage module；
Energy-storage module is connect with the photovoltaic generating module, for storing the direct current energy, and by the ginseng of the direct current energy
Number information is sent to Intelligent management module；
Intelligent management module is connect with the energy-storage module, for generating control letter according to the parameter information of the direct current energy
Number, and the control signal is sent to unsteady flow module；
Unsteady flow module is connect with the Intelligent management module and the energy-storage module, and being used for will be described according to the control signal
Direct current energy is converted to AC energy, to be connected to the grid, or the AC energy in power grid is converted to direct current energy and is stored to institute
State energy-storage module.
2. system according to claim 1, which is characterized in that the photovoltaic generating module includes: solar battery group, whole
Flow unit and DC power distribution cabinet；
The solar battery group, for converting solar energy into direct current energy and storing to the rectification unit；
The rectification unit is connect with the solar battery group, for the balanced direct current energy；
The DC power distribution cabinet is connect with the rectification unit, for controlling the direct current energy driving loaded work piece.
3. system according to claim 1, which is characterized in that the energy-storage module includes: energy storage battery group, and packet
Wrap up in the radiator of the energy storage battery group；
The radiator includes fixed plate and multiple cooling fins, and the cooling fin is welded and fixed with the fixed plate, and described
Cooling fin is bonded the energy storage battery group；
The cooling fin is layer structure, including substrate and graphite ene coatings made of being stacked with；
The substrate is heat-conducting plastic；
The graphite ene coatings are graphene heat-conducting silicone grease.
4. system according to claim 1, which is characterized in that the Intelligent management module include: electrical energy parameter collector,
Data processor and the controller being connected with data processor；
The electrical energy parameter collector, for acquiring the parameter information of the direct current energy；The direct current energy parameter information packet
Include load voltage, load current or bearing power；
The data processor, for generating the control signal according to the parameter information of the direct current energy；The control
Signal processed includes that direct current turns AC signal or exchange to turn direct current signal；
Direct current energy is converted to exchange for turning the AC signal control unsteady flow module according to the direct current by the controller
Electric energy is connected to the grid, or turns the direct current signal control unsteady flow module according to the exchange and AC energy is converted to direct current
Energy.
5. system according to claim 1, which is characterized in that the unsteady flow module includes:
DC filtering circuit is connect with the energy-storage module, for reducing the common mode interference of the direct current energy；
Booster circuit, and the DC filtering circuit connection, for improving the voltage of the direct current energy；
CL filter circuit is connect with the booster circuit, for filtering out the radio-frequency component in the direct current energy；
Conversion circuit is connect with the CL filter circuit and the Intelligent management module, for according to the Intelligent management module
Direct current energy is converted to AC energy and is connected to the grid by the control signal of transmission, or the AC energy in power grid is converted to direct current
Power storage is to the energy-storage module；
LCL filter circuit is connect with the conversion circuit, for reducing the high-frequency harmonic in the AC energy；
Ac filter circuit is connect, for inhibiting the High-frequency Interference in the AC energy with the LCL filter circuit.
6. system according to claim 5, which is characterized in that the DC filtering circuit includes: first capacitor C1, second
Capacitor C2, third capacitor C3, the 4th capacitor C4, the 5th capacitor C5, the 6th capacitor C6, the 7th capacitor C7, the 8th capacitor C8, the 9th
Capacitor C9, first diode D1, the second diode D2, third diode D3 and the 4th diode D4, the first inductance L1；
Wherein, one end ground connection of first capacitor C1, the other end connect one end of the second capacitor C2, first diode D1 anode,
One end of third capacitor C3, the anode of third diode D3, one end of the 6th capacitor C6, one end of the 7th capacitor C7, the 8th electricity
Hold one end of C8 and one end of the 9th capacitor C9；Cathode, the 4th electricity of the other end connection first diode D1 of second capacitor C2
Hold one end of C4 and the anode of the second diode D2；The cathode of the other end connection third diode D3 of third capacitor C3, the 5th
The anode of one end of capacitor C5 and the 4th diode D4；The other end of 4th capacitor C4, the cathode of the second capacitor D2, the 5th capacitor
The other end of C5, the 4th diode D4 cathode be all connected with the other end and the 7th of one end of the first inductance L1, the 6th capacitor C6
The other end of capacitor C7；The other end of first inductance L1 be connected to the 8th capacitor C8 the other end and the 9th capacitor C9 it is another
End.
7. system according to claim 5, which is characterized in that the booster circuit includes: relay KA1, the second inductance
L2, third inductance L3, the 5th diode D5, the 6th diode D6, switching tube K1 and switching tube K2；
Wherein, one end of relay KA1 connects the cathode output end of the DC filtering circuit, and the other end connects the second inductance L2
One end, the other end of the second inductance L2 connect with the anode of the 5th diode D5 and one end of switching tube K1 respectively, the five or two
The cathode of pole pipe D5 is the positive output end of the booster circuit, and the other end of switching tube K1 is the zero output of the booster circuit
End；One end of third inductance L3 connects the cathode output end of the DC filtering circuit, the other end of third inductance L3 respectively with
The cathode of 6th diode D6 is connected with one end of switching tube K2, and the cathode of the 6th diode D6 is that bearing for the booster circuit is defeated
Outlet, the other end of switching tube K2 are the zero-output terminal of the booster circuit.
8. system according to claim 5, which is characterized in that the ac filter circuit includes: the tenth capacitor C10,
Four inductance L4, the 5th inductance L5, wherein one end of the tenth capacitor C10 is connect with one end of the 4th inductance L4, connection
Node is one end of the ac filter circuit；The other end of the tenth capacitor C10 and one end of the 5th inductance L5 connect
It connects, connecting node is the other end of the ac filter circuit；The other end of the 4th inductance L4, the 5th inductance L5 it is another
End connection power grid.
9. system according to claim 1, which is characterized in that the Intelligent management module is according to the ginseng of the direct current energy
Number information generates control signal and executes following steps:
Step A1, the output of the parameter information and the photovoltaic generating module of the direct current energy that the energy-storage module is sent is obtained
Voltage exports electric current according to the saturation that the output voltage of photovoltaic generating module calculates the energy-storage module；
Wherein, I is saturation output electric current, and Ig is electric current caused by photovoltaic generating module, and Vg is the output of photovoltaic generating module
Voltage, Rc are the series resistance of default photovoltaic generating module, and Rl is the saturation resistance of default photovoltaic generating module, and Ib is photovoltaic hair
The saturation current of electric module, q are preset electron charge value, and β is default Boltzmann constant, and α is default diode coefficient, T
For Current Temperatures, T1 is standard Kelvin degree Celsius, the temperature coefficient of electric current when θ is short circuit, and T0 preset standard temperature is photovoltaic
Area in electricity generation module for the fixed plate of power generation, Sfs are default solar irradiation intensity；
Step A2, the saturation output voltage of the energy-storage module is calculated；
Wherein, V is the saturation output voltage of energy-storage module；
Step A3, the monitoring intensity of solar radiation of photovoltaic generating module present position, the photovoltaic generating module are obtained
The temperature of solar panel, and obtain the temperature coefficient of the solar panel of the photovoltaic generating module, and with the storage
The photovoltaic generating module is calculated in the saturation output voltage of energy module, the saturation output electric current of the energy-storage module jointly
Equal power；
Wherein, P is the equal power of photovoltaic generating module, and Sin is the intensity of solar radiation of photovoltaic generating module present position, L
For the temperature coefficient of the solar panel of photovoltaic generating module, Tb is the temperature of the solar panel of photovoltaic generating module；
Step A4, judge whether the equal power P of the photovoltaic generating module is greater than preset bearing power, if more than then generating
Direct current energy is converted to the control signal of AC energy, and the power converted subtracts bearing power into P, if equal power P is small
In preset bearing power, then the signal that the AC energy in power grid is converted to direct current energy is generated, and the power converted is
Bearing power subtracts P.
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