CN107425538A - A kind of photovoltaic energy storage integral type electricity generation system - Google Patents
A kind of photovoltaic energy storage integral type electricity generation system Download PDFInfo
- Publication number
- CN107425538A CN107425538A CN201710434836.6A CN201710434836A CN107425538A CN 107425538 A CN107425538 A CN 107425538A CN 201710434836 A CN201710434836 A CN 201710434836A CN 107425538 A CN107425538 A CN 107425538A
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- China
- Prior art keywords
- bus
- energy storage
- combining inverter
- bridge arm
- connection end
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- 238000004146 energy storage Methods 0.000 title claims abstract description 48
- 230000005611 electricity Effects 0.000 title claims abstract description 22
- 239000003990 capacitor Substances 0.000 claims abstract description 14
- 238000002513 implantation Methods 0.000 abstract description 2
- 230000002441 reversible effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
Classifications
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- H02J3/383—
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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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- 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
- H02M3/158—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 including plural semiconductor devices as final control devices for a single load
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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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Inverter Devices (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A kind of photovoltaic energy storage integral type electricity generation system, including photovoltaic module, dc bus, bus Support Capacitor group, combining inverter, energy storage converter, batteries and cutting-in control switch.Photovoltaic module is directly accessed dc bus, to dc bus Implantation Energy.Bus Support Capacitor group accesses dc bus, supports DC bus-bar voltage.Combining inverter DC side accesses dc bus, and while AC exports terminating load, energy is provided to load.Combining inverter switchs access power network by cutting-in control, with power network positive energy exchange.Batteries access dc bus by energy storage converter, realize the energy exchange of batteries and dc bus.
Description
Technical field
The present invention relates to a kind of photovoltaic energy storage electricity generation system, especially a kind of photovoltaic energy storage integral type electricity generation system.
Background technology
In recent years, environmental problem getting worse, conventional fossil fuel can not meet the needs of environment, it is necessary to send out energetically
Open up the regenerative resource using solar energy as representative.Photovoltaic generation has randomness and intermittence, when its extensive access power network meeting
Power grid operation is impacted.Photovoltaic energy storage integral type electricity generation system, utilization rate and the user of photovoltaic generation can be improved
The stability of power supply, at the same time it can also improve the reliability of power network.Existing photovoltaic energy storage integral type electricity generation system generally existing body
Product is big, efficiency is low, the problems such as installation and debugging inconvenience.
Chinese patent 201410336539.4 discloses a kind of photovoltaic energy storage system, and the patent carries photovoltaic energy storage system light
Volt component and battery pack connect dc bus by photovoltaic side converter and battery side converter respectively, and local load is through full-bridge inverting
Device connects dc bus, and public electric wire net is linked between local load and full-bridge inverter.And propose based on TI's
The IGBT power module of TMS320F28335 chips and Mitsubishi's intelligent power module.The patent puies forward photovoltaic energy storage system and adopted
With two-stage type electricity generation system, there is that volume is big, efficiency is low, control the shortcomings of complicated.
Chinese patent 201610083087.2 discloses a kind of grid-connected electric power system of photovoltaic energy storage, it include photovoltaic module,
Boost circuit, Buck-Boost translation circuits, batteries, full-bridge inverter circuit, civil power.Photovoltaic module passes through
Boost circuit is to dc bus Implantation Energy.Batteries mount dc bus through Buck-Boost translation circuits.Civil power
With load dc bus is mounted through full bridge inverter.The patent puies forward photovoltaic energy storage electricity generation system and equally has that efficiency is low, body
The problems such as product is big.
The content of the invention
The purpose of the present invention is to overcome the disadvantages mentioned above of prior art, proposes a kind of photovoltaic energy storage integral type electricity generation system.
The present invention can be achieved it is a kind of improve power density, improve operating efficiency, and it is simple in construction, using reliable.
In order to achieve this, the technical solution adopted by the present invention is as follows：
Photovoltaic energy storage integral type electricity generation system of the present invention is become by photovoltaic module, dc bus, bus Support Capacitor group, energy storage
Parallel operation, combining inverter, batteries and cutting-in control switch composition.Photovoltaic module is connected with dc bus, bus support
Capacitance group is connected with dc bus, and batteries are connected by energy storage converter with dc bus, the DC side of combining inverter
It is connected with dc bus, AC and the load of combining inverter are connected, and one end of cutting-in control switch is connected with power network, grid-connected
The other end of controlling switch connects with load.
Described dc bus is made up of positive DC bus and negative DC bus, the positive pole connection positive pole of photovoltaic module
Dc bus, the negative pole connection negative DC bus of photovoltaic module.The H ends connection positive DC bus of bus Support Capacitor group,
The H1 ends connection negative DC bus of bus Support Capacitor group.The positive pole K ends connection positive pole of energy storage converter High voltage output side is straight
Flow bus, the negative pole K1 ends connection negative DC bus of energy storage converter High voltage output side.The positive pole of energy storage converter low-pressure end
Connect the positive pole F ends of batteries, the negative pole F1 ends of the negative pole connection batteries of energy storage converter low-pressure end.Combining inverter
The positive pole connection positive DC bus of DC side, the negative pole connection negative DC bus of combining inverter DC side.Parallel network reverse
Device ac output end A is connected with load connection end B, and combining inverter ac output end A1 is connected with load connection end B1.Load
Connection end B is connected with cutting-in control switch connection end E, and load connection end B1 is connected with power network connection end N.Cutting-in control switch connects
End E1 is met to be connected with power network connection end L.
Described energy storage converter and combining inverter common bus Support Capacitor group.The bus Support Capacitor group is by m
Individual electric capacity composes in parallel, m >=1, and its function is stable DC busbar voltage.
The energy exchange for acting as realizing batteries and dc bus of the energy storage converter, energy storage converter are N
Weight One Buck-Boost converter body, N >=1, is composed in parallel, each bridge arm is by upper switch control unit and lower switch control by N number of bridge arm
Unit composition processed, upper switch control unit negative pole are connected with lower switch control unit positive pole, and each switch control unit is by switching
Device is formed with anti-paralleled diode, and each bridge arm is connected by inductance with batteries.
Batteries can shunt capacitance also not shunt capacitance.
The energy exchange for acting as realizing power network and dc bus of the combining inverter simultaneously powers to the load, grid-connected inverse
Become device by bridge arm X1, bridge arm X2 and wave filter group into bridge arm X1 is in parallel with bridge arm X2, and each bridge arm is by upper switch control unit
Formed with lower switch control unit, upper switch control unit negative pole is connected with lower switch control unit positive pole, each switch control
Unit is made up of switching device and anti-paralleled diode, and wave filter is by inductance Lg1, inductance Lg1, electric capacity Cg1Composition, bridge arm X1 connections
Hold W1 and inductance Lg1Connection end W3 connections, bridge arm X2 connection end W2 and inductance Lg2Connection end W4 connections, electric capacity Cg1One end and inductance
Lg1Connection end W5 connections, electric capacity Cg1One end and inductance Lg2Connection end W6 connections.
Brief description of the drawings
Fig. 1 photovoltaic energy storage integral type electricity generation system control principle drawings；
The triple crisscross parallel One Buck-Boost converter body topological structures of Fig. 2；
The triple crisscross parallel One Buck-Boost converter body work waves of Fig. 3；
Fig. 4 combining inverter topological structures；
Fig. 5 combining inverter work waves.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in figure 1, photovoltaic energy storage integral type electricity generation system of the present invention supports electricity by photovoltaic module, dc bus, bus
Appearance, energy storage converter, combining inverter and cutting-in control switch composition.
Bus Support Capacitor group function is support DC bus-bar voltage, is composed in parallel by m electric capacity, m >=1.Energy storage converts
The control batteries that act as of device realize energy exchange with dc bus.Energy storage converter is the two-way changes of N weight Buck-Boost
Parallel operation, N >=1.Each bridge arm is made up of upper switch control unit and lower switch control unit, and each switch control unit is by switching
Device and anti-paralleled diode are formed, and each bridge arm is connected by inductance with electric power storage group, electric power storage group can shunt capacitance also not simultaneously
Join electric capacity.Combining inverter is single-phase full-bridge inverter, and wave filter is made up of two inductance and an electric capacity, combining inverter two
Respectively one inductance of connection respectively draws an output end to individual bridge arm simultaneously, and electric capacity is articulated in output end.Load is defeated with combining inverter
Go out end connection, power network is connected by cutting-in control switch and combining inverter output.Energy storage converter is double with 3 weight Buck-Boost
To exemplified by converter, as shown in Fig. 2 when energy storage converter works, the drive signal of bridge arm 2 lags π/3 than the drive signal of bridge arm 1,
The drive signal of bridge arm 3 lags π/3 than the drive signal of bridge arm 2.3 heavy Buck-Boost reversible transducers work waves as shown in figure 3,
Battery output ripple very little, batteries can shunt capacitance or not, reversible transducer inductance volume do not subtract significantly yet
It is small, the power density of photovoltaic energy storage integral type electricity generation system is improved, while improve photovoltaic energy storage integral type electricity generation system
Operating efficiency.Combining inverter replaces an inductance with two small inductors as shown in figure 4, wave filter uses LC wave filters, drops
While low inductance volume, operating efficiency is improved, combining inverter operating voltage is as shown in Figure 5.
Claims (5)
- A kind of 1. photovoltaic energy storage integral type electricity generation system, it is characterised in that：Described photovoltaic energy storage integral type electricity generation system is by light Lie prostrate component, dc bus, bus Support Capacitor group, energy storage converter, batteries, combining inverter and cutting-in control switches set Into；Photovoltaic module is connected with dc bus, and bus Support Capacitor group is connected with dc bus, and batteries pass through energy storage converter It is connected with dc bus, the DC side of combining inverter is connected with dc bus, and AC and the load of combining inverter connect, One end of cutting-in control switch is connected with power network, and one end and the load of cutting-in control switch connect.
- 2. photovoltaic energy storage integral type electricity generation system according to claim 1, it is characterised in that：Described dc bus is by just Pole dc bus and negative DC bus composition, photovoltaic module positive pole connection positive DC bus, the connection of photovoltaic module negative pole are negative Pole dc bus；The H ends connection positive DC bus of bus Support Capacitor group, the H1 ends connection negative pole of bus Support Capacitor group are straight Flow bus；Energy storage converter High voltage output side positive pole K ends connect positive DC bus, energy storage converter High voltage output side negative pole K1 End connection negative DC bus；Energy storage converter low-pressure end positive pole connection batteries positive pole F ends, energy storage converter low-pressure end are born Pole connection batteries negative pole F1 ends；Combining inverter DC side positive pole connects positive DC bus, combining inverter DC side Negative pole connects negative DC bus；Combining inverter ac output end A is connected with load connection end B, and combining inverter exchange is defeated Go out to hold A1 to be connected with load connection end B1；Load connection end B and cutting-in control switch connection end E be connected, load connection end B1 and The N connections of power network connection end；Cutting-in control switch connection end E1 is connected with power network connection end L.
- 3. photovoltaic energy storage integral type electricity generation system according to claim 1, it is characterised in that：Described energy storage converter with Combining inverter common bus Support Capacitor group, bus Support Capacitor group are composed in parallel by m electric capacity, m >=1.
- 4. photovoltaic energy storage integral type electricity generation system according to claim 1, it is characterised in that：Described energy storage converter is N weight One Buck-Boost converter bodies, N >=1, are composed in parallel, each bridge arm is by upper switch control unit and lower switch control by N number of bridge arm Unit processed composition, the negative pole of upper switch control unit are connected with the positive pole of lower switch control unit, each switch control unit by Switching device is formed with anti-paralleled diode, and each bridge arm is connected by inductance with batteries.
- 5. photovoltaic energy storage integral type electricity generation system according to claim 1, it is characterised in that：Described combining inverter by Bridge arm X1, bridge arm X2 and wave filter group are into bridge arm X1 is in parallel with bridge arm X2, and each bridge arm is opened by upper switch control unit with Control unit composition is closed, first positive pole that the negative pole of upper switch control unit is single with lower switch control is connected, and each switch control is single Member is made up of switching device and anti-paralleled diode；Wave filter is by inductance Lg1, inductance Lg1With electric capacity Cg1Composition；Bridge arm X1 company Meet end W1 and inductance Lg1Connection end W3 connections, bridge arm X2 connection end W2 and inductance Lg2Connection end W4 connections, electric capacity Cg1's One end and inductance Lg1Connection end W5 connections, electric capacity Cg1The other end and inductance Lg2Connection end W6 connections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710434836.6A CN107425538A (en) | 2017-06-10 | 2017-06-10 | A kind of photovoltaic energy storage integral type electricity generation system |
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| CN201710434836.6A CN107425538A (en) | 2017-06-10 | 2017-06-10 | A kind of photovoltaic energy storage integral type electricity generation system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109361239A (en) * | 2018-12-05 | 2019-02-19 | 江苏中导电力有限公司 | Integral control system is filled in light storage |
| CN110549861A (en) * | 2019-09-26 | 2019-12-10 | 湖南大学 | multi-system traction transmission system based on multiple Boost/Buck choppers |
| CN110571860A (en) * | 2019-11-03 | 2019-12-13 | 国网湖北省电力有限公司随州供电公司 | Method for maintaining voltage stability of direct-current bus of grid-connected photovoltaic power generation system |
| CN112467795A (en) * | 2020-11-27 | 2021-03-09 | 嘉兴南洋职业技术学院 | Integrated inverter for intelligent micro-grid |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109361239A (en) * | 2018-12-05 | 2019-02-19 | 江苏中导电力有限公司 | Integral control system is filled in light storage |
| CN110549861A (en) * | 2019-09-26 | 2019-12-10 | 湖南大学 | multi-system traction transmission system based on multiple Boost/Buck choppers |
| CN110549861B (en) * | 2019-09-26 | 2020-11-24 | 湖南大学 | Multi-system traction transmission system based on multiple Boost/Buck choppers |
| CN110571860A (en) * | 2019-11-03 | 2019-12-13 | 国网湖北省电力有限公司随州供电公司 | Method for maintaining voltage stability of direct-current bus of grid-connected photovoltaic power generation system |
| CN112467795A (en) * | 2020-11-27 | 2021-03-09 | 嘉兴南洋职业技术学院 | Integrated inverter for intelligent micro-grid |
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