CN106602565B - A kind of electric automobile charging station power supply system based on solid-state transformer - Google Patents
A kind of electric automobile charging station power supply system based on solid-state transformer Download PDFInfo
- Publication number
- CN106602565B CN106602565B CN201710087591.4A CN201710087591A CN106602565B CN 106602565 B CN106602565 B CN 106602565B CN 201710087591 A CN201710087591 A CN 201710087591A CN 106602565 B CN106602565 B CN 106602565B
- Authority
- CN
- China
- Prior art keywords
- energy
- phase
- bridge
- converter
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007600 charging Methods 0.000 title claims abstract description 144
- 238000004146 energy storage Methods 0.000 claims abstract description 60
- 238000009826 distribution Methods 0.000 claims abstract description 17
- 239000003990 capacitor Substances 0.000 claims description 21
- 230000007935 neutral effect Effects 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims description 2
- 230000033228 biological regulation Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Classifications
-
- 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
- H02J3/02—Circuit arrangements for ac mains or ac distribution networks using a single network for simultaneous distribution of power at different frequencies; using a single network for simultaneous distribution of ac power and of dc power
-
- 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
-
- H02J3/383—
-
- H02J3/386—
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal 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
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal 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
- H02M7/2173—Conversion of ac power input into dc power output without possibility of reversal 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 in a biphase or polyphase circuit arrangement
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal 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
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal 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
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal 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 in a bridge configuration
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The equipment such as electric automobile charging station power supply system based on solid-state transformer, including ac/dc solid-state transformer, DC power distribution cabinet, DC charging cabinet, direct-current charging post, inverter, AC charging cabinet and alternating-current charging pile that the invention discloses a kind of.The system is provided with the power supply line based on 400V direct current and accesses power grid by ac/dc solid-state transformer, effectively inhibit influence of the harmonic wave generated in electric vehicle charging process to grid power quality, effectively improve power factor, it is energy-saving to realize, and simplify the structure of power supply system and charging equipment, on this basis, the application of energy-storage units can carry out Effective Regulation to network load, be conducive to powered stable, the setting of ac/dc solid-state transformer and the power supply line based on 400V direct current is also convenient for solar energy, the access of the renewable energy such as wind energy.
Description
Technical field
The present invention relates to electric automobile charging station power supply technique fields, in particular to a kind of based on the electronic of solid-state transformer
Vehicle charging station power supply system.
Background technique
Typical electric automobile charging station power supply system is as shown in Figure 1 at present.Transformer 102 is connected to power grid 101 and obtains
380V three-phase alternating current is the power supply of the equipment such as charging load and communication, the illumination of electric automobile charging station.Low-tension switch cabinet 103
Multiple alternating-current charging piles 106 and multiple DC charging cabinets 107 are connected, provides electric energy for charging load.Alternating-current charging pile 106 can be
Electric car provides 220V AC charging voltage, charges at a slow speed for exchanging.Electric energy is further assigned to by DC charging cabinet 107
380V three-phase alternating current is converted 400V and 750V DC voltage by multiple direct-current charging posts 108, direct-current charging post 108, can be
Electric car provides direct current quick charge voltage.In addition, 380V three-phase AC line is also connected with compensation equipment 105, for idle
Compensation and increase power factor, to meet the requirement of access power grid.
Existing electric automobile charging station power supply system uses traditional power transformer and with 380V three-phase alternating current
Main power supply line, disadvantage is that:
It (1), during the charging process will be simultaneously to power grid harmonic electric current since electric car is charged as nonlinear load
Grid power quality decline, grid loss increase and power transmission and transforming equipment normal capacity is caused to occupy.Using traditional power transformer
Device can not be isolated and be administered to the harmonic wave of generation when accessing power grid, therefore, needed that harmonic wave is added in charging equipment and controlled
Module is managed, and needs to add reactive-load compensation equipment in power supply line, to improve the power factor of access grid nodes.However,
According to existing power supply system structure, each charging pile requires setting harmonic wave control module, controls to obtain preferable harmonic wave
Effect is managed, the cost of corresponding charging pile will dramatically increase.In addition, being saved to obtain preferable free compensation effect with stablizing
Point voltage, the compensation capacity of reactive-load compensation equipment are also required to be changed according to loading condition, corresponding to compensate equipment control again
Miscellaneous, equipment manufacturing cost also correspondinglys increase.
(2) charging of electric car especially direct current quick charge will bring a large amount of variation to network load, be unfavorable for
Keep powered stable.
(3) existing power supply system inconvenience accesses renewable energy.In the presence of solar energy, this kind of renewable energy of wind energy
Denaturation, it is intermittent and it is difficult to predict etc. inherent characteristics, the traditional power transformer that existing power supply system uses do not have voltage tune
Whole function, it is difficult to which the node voltage of control access power grid keeps stablizing.In addition, due to using based on 380V three-phase alternating current
Power supply line, when solar energy, wind energy access, need inverter to inverte direct current to alternating current to be incorporated to power supply line, for can
Conversion, storage and the control utilized of the renewable sources of energy will be extremely complex, it is difficult to carry out practical application.
Summary of the invention
In view of this, the present invention provides a kind of electric automobile charging station power supply system based on solid-state transformer, the system
Power grid is accessed provided with the power supply line based on 400V direct current and by ac/dc solid-state transformer, effectively inhibits electricity
Influence of the harmonic wave generated in motor-car charging process to grid power quality, effectively improves power factor, to realize energy saving drop
Consumption, and the structure of power supply system and charging equipment is simplified, on this basis, the application of energy-storage units can carry out network load
Effective Regulation is conducive to powered stable, the setting of ac/dc solid-state transformer and the power supply line based on 400V direct current
It is also convenient for the access of the renewable energy such as solar energy, wind energy.
In order to solve the above technical problems, the electric automobile charging station power supply based on solid-state transformer that the present invention provides a kind of
System, comprising: ac/dc solid-state transformer, DC power distribution cabinet, DC charging cabinet, direct-current charging post, inverter, exchange are filled
Electric cabinet and alternating-current charging pile；
The ac/dc solid-state transformer is separately connected power grid and the DC power distribution cabinet, and the alternating voltage of power grid is logical
It crosses the ac/dc solid-state transformer and is converted into 400V DC voltage；
The DC power distribution cabinet is separately connected the DC charging cabinet and the inverter, by 400V DC voltage distribute to
The DC charging cabinet and the inverter；
The DC charging cabinet is separately connected multiple direct-current charging posts, 400V DC voltage is supplied to each described
Direct-current charging post；
The inverter connects the AC charging cabinet, and 400V DC voltage is converted to 380V AC three-phase voltage；
The AC charging cabinet is separately connected multiple alternating-current charging piles, 380V AC three-phase voltage is supplied to each
The alternating-current charging pile.
As a preference, the direct-current charging post provides the voltage output port of 400V and/or 750V.
As a preference, the power supply system further include: the first DC to DC converter and energy-storage units；
First DC to DC converter is separately connected the DC power distribution cabinet and the energy-storage units, and described first
DC to DC converter can be realized the bi-directional of electric energy；
First DC to DC converter is used for when the direct-current charging post and/or alternating-current charging pile access are negative
When load, the energy-storage units are controlled by first DC to DC converter to the direct-current charging post and/or the exchange
The load of charging pile access provides electric energy.
As an improvement first DC to DC converter is also used to when the direct-current charging post and/or the friendship
When current charge stake does not access load, control the energy-storage units receive and store by first DC to DC converter come
From the electric energy of power grid.
It is improved as another kind, the power supply system further include: photovoltaic controller and photovoltaic cell；
The photovoltaic controller is separately connected the DC power distribution cabinet and the photovoltaic cell；
The photovoltaic controller is used for the control when the direct-current charging post and/or alternating-current charging pile access load
The photovoltaic cell is mentioned by the photovoltaic controller to the load that the direct-current charging post and/or the alternating-current charging pile access
For electric energy；
The photovoltaic controller is also used to when the direct-current charging post and/or the alternating-current charging pile do not access load,
It controls the photovoltaic cell and provides rechargeable electrical energy to the energy-storage units by the photovoltaic controller；
First DC to DC converter is also used to not connect when the direct-current charging post and/or the alternating-current charging pile
When entering to load, controls the energy-storage units and received and stored from power grid and/or light by first DC to DC converter
Lie prostrate the electric energy of battery.
As a preference, the power supply system further include: multiple first DC to DC converter, multiple energy storage lists
First, multiple second DC to DC converter, photovoltaic controller, photovoltaic cell, rectifier and wind-driven generator；
State the number phase of the first DC to DC converter, the energy-storage units and second DC to DC converter
Together, wherein first DC to DC converter, the energy-storage units and second DC/DC become
Parallel operation three constitutes one group of energy storing structure；
The photovoltaic cell connects the direct-flow input end of the photovoltaic controller, and the wind-driven generator connects the rectification
The DC output end of the ac input end of device, the DC output end of the photovoltaic controller and the rectifier links together shape
At renewable energy dc bus；
First DC terminal of first DC to DC converter in energy storing structure described in each group connects the direct current
Power distribution cabinet, the second DC terminal connect the energy-storage units in the group；
First DC terminal of second DC to DC converter in energy storing structure described in each group also connects in the group
The energy-storage units, the second DC terminal is connected to renewable energy dc bus；
First DC to DC converter can be realized the bi-directional of electric energy, second DC to DC converter
It can be realized and electric energy is transferred to the energy-storage units from the renewable energy dc bus；
The electric energy that the photovoltaic cell generates is passed on by the photovoltaic controller and second DC to DC converter
It is stored to the energy-storage units being arbitrarily designated；
The electric energy that the wind-driven generator generates by the rectifier and second DC to DC converter pass on to
The energy-storage units being arbitrarily designated are stored；
First DC to DC converter is used to not access when the direct-current charging post and/or the alternating-current charging pile
When load, controls the energy-storage units being arbitrarily designated and received and stored from electricity by first DC to DC converter
The electric energy of net；
First DC to DC converter is also used to access when the direct-current charging post and/or the alternating-current charging pile
When load, controls the energy-storage units being arbitrarily designated and pass through first DC to DC converter to the direct-current charging post
And/or the load of the alternating-current charging pile provides electric energy.
As a preference, the energy-storage units are rechargeable battery.
As a preference, the ac/dc solid-state transformer is that three-phase and four-line exchanges input and direct current output, it is described
Ac/dc solid-state transformer includes A phase subelement, B phase subelement and C phase subelement, and each phase subelement can complete band
The AC to DC voltage of isolation converts；
The first terminal of the A phase subelement ac input end mouth connects power grid A phase, the A phase subelement exchange input
The Second terminal of port connects network neutral line；
The first terminal of the B phase subelement ac input end mouth connects power grid B phase, the B phase subelement exchange input
The Second terminal of port connects network neutral line；
The first terminal of the C phase subelement ac input end mouth connects power grid C phase, the C phase subelement exchange input
The Second terminal of port connects network neutral line；
The direct current output port of the A phase subelement, the B phase subelement and the C phase subelement is in parallel.
As a preference, the A phase subelement, the B phase subelement and the C phase subelement include rectification mould
Block, isolated DC/DC converting module, first capacitor and the second capacitor；
The ac input end of the rectification module connects each input terminal of the phase subelement from power grid, the rectification module
DC output end connects the isolated DC/DC converting module input terminal, and the DC output end of the rectification module is also
First capacitor in parallel, the isolated DC/DC converting module output end connect the DC output end of each phase subelement, institute
State isolated DC/DC converting module output end the second capacitor also in parallel.
As an improvement the A phase subelement, the B phase subelement and the C phase subelement include multiple isolation
Type ac/dc conversion module and filter inductance；
The isolated AC/DC converting module includes the first H bridge, the 2nd H bridge, the 3rd H bridge, third capacitor, the 4th
Capacitor and high frequency transformer；
The first H bridge, the 2nd H bridge, the 3rd H bridge are made of 4 IGBT modules, the first H bridge
The midpoint of one bridge arm and the second bridge arm constitutes the input port of the isolated AC/DC converting module, the first H bridge
The upper and lower ends third capacitor in parallel, the upper and lower ends of the first H bridge are connect with the upper and lower ends of the 2nd H bridge, institute
The port for stating the midpoint formation of the 2nd the first bridge arm of H bridge and the second bridge arm is connect with a side ports of the high frequency transformer,
The port that the midpoint of the secondary port of the high frequency transformer and the first bridge arm of the 3rd H bridge and the second bridge arm is formed connects
It connects, the upper and lower ends of the 3rd H bridge the 4th capacitor in parallel, the upper and lower ends of the 3rd H bridge constitute the isolated form
The output port of ac/dc conversion module；
The filter inductance is sequentially connected in series with multiple isolated ACs/DC converting module input mouth and to form each phase
The ac input end mouth of subelement, the output port parallel connection of the multiple isolated AC/DC converting modules form each phase
The direct current output port of unit.
The invention has the beneficial effects that:
(1) solid-state transformer itself has the advantages that small in size, light-weight, non-environmental-pollution, easy to maintain, present invention use
Ac/dc solid-state transformer, on the one hand, the flexible modulation that grid side electric current and power may be implemented guarantees to be always ensured that
Grid side electric current is sinusoidal waveform, is had to the function of grid side power factor regulation, can avoid the harmonic wave generated when charging with
And the power quality problem of power factor decline travels to grid side, to ensure power grid powered stable and reduce current supply loss；
On the other hand, power supply line power supply of the power grid by ac/dc solid-state transformer into charging station based on 400V direct current, is handed over
Stream/DC solid transformer can ensure that charging station side supply voltage is stablized；In addition, being had by ac/dc solid-state transformer
To the good result of grid side power factor regulation and harmonics restraint, can be set without using reactive compensation in power supply system
Standby, charging equipment can also weaken the requirement to harmonic restraining function, can effectively simplify the structure of power supply system and charging equipment, drop
Low construction cost.
(2) access of energy-storage units is convenient in the power supply line in charging station based on 400V direct current, thus can be adjusted flexibly
The load condition of charging station is utilized energy-storage units energy storage in idle, is cooperated when charging load is big using energy-storage units and power grid
It powers to the load simultaneously, network load is effectively relieved and largely changes the influence caused by powered stable.
(3) access of renewable energy is convenient in the power supply line in charging station based on 400V direct current, cooperates energy-storage units
Use, charge using solar energy, wind energy to electric car, effectively improve the utilization rate of renewable energy.
Detailed description of the invention
Fig. 1 is electric automobile charging station power supply system in the prior art.
Fig. 2 is electric automobile charging station power supply system embodiment one provided by the invention.
Fig. 3 is electric automobile charging station power supply system embodiment two provided by the invention.
Fig. 4 is electric automobile charging station power supply system embodiment three provided by the invention.
Fig. 5 is electric automobile charging station power supply system example IV provided by the invention.
Fig. 6 is the embodiment of ac/dc solid-state transformer provided by the invention.
Fig. 7 is the embodiment of each phase subelement of A, B, C in ac/dc solid-state transformer provided by the invention.
Specific embodiment
In order to make those skilled in the art more fully understand technical solution of the present invention, With reference to embodiment
The present invention is described in further detail.
Fig. 2 is the embodiment one of electric automobile charging station power supply system provided by the invention.Electricity based on solid-state transformer
Electrical automobile charging station power supply system include: ac/dc solid-state transformer 202, DC power distribution cabinet 203, DC charging cabinet 204,
Direct-current charging post (206,207), inverter 205, AC charging cabinet 208 and alternating-current charging pile (209,210).Ac/dc is solid
State transformer 202 is separately connected power grid 201 and DC power distribution cabinet 203, and the alternating voltage of power grid 201 passes through ac/dc solid-state
Transformer 202 is converted into 400V DC voltage.DC power distribution cabinet 203 is separately connected DC charging cabinet 204 and inverter 205, will
400V DC voltage is distributed to DC charging cabinet 204 and inverter 205.DC charging cabinet 204 is separately connected multiple DC chargings
400V DC voltage is supplied to each direct-current charging post by stake (206,207).
Inverter 205 connects AC charging cabinet 208, and 400V DC voltage is converted to 380V AC three-phase voltage.
AC charging cabinet 208 is separately connected multiple alternating-current charging piles 210, and 380V AC three-phase voltage is supplied to each friendship
Current charge stake.
Due to the use of ac/dc solid-state transformer 202, the flexible modulation of grid side electric current and power may be implemented,
Guarantee is always ensured that grid side electric current is sinusoidal waveform, has the function to grid side power factor regulation, when can avoid charging
The power quality problem of harmonic wave and the power factor decline of generation travels to grid side, to ensure power grid powered stable and drop
Low current supply loss.Ac/dc solid-state transformer 202 can also ensure charging station side 400V direct current supply voltage stabilization.
As a preferred embodiment, direct-current charging post (206,207) provides the voltage output port of 400V and/or 750V.
Fig. 3 is the embodiment two of electric automobile charging station power supply system provided by the invention.The base of embodiment one in Fig. 2
On plinth, the electric automobile charging station power supply system of embodiment two further includes DC to DC converter 305 and energy-storage units in Fig. 3
309.DC to DC converter 305 is separately connected DC power distribution cabinet 303 and energy-storage units 309,305 energy of DC to DC converter
Enough realize the bi-directional of electric energy.
When direct-current charging post (307,308) and alternating-current charging pile (311,312) access load, pass through DC/DC
The control of converter 305, energy-storage units 309 can by DC to DC converter 305 to direct-current charging post (307,308) with
And the load of alternating-current charging pile (311,312) access provides electric energy.
When direct-current charging post (307,308) and alternating-current charging pile (311,312) do not access load, by direct current/straight
The control of current converter 305, energy-storage units 309, which can be received and be stored by DC to DC converter 305, comes from power grid 301
Electric energy.
Energy-storage units 309 using adjustable electric automobile charging station for the load of power grid, utilize energy storage in idle
Unit energy storage is powered to the load when charging load is big using energy-storage units and power grid cooperation simultaneously, slows down a large amount of load accesses
And when direct current quick charge power grid load change, be conducive to ensure power grid powered stable.
Fig. 4 is the embodiment three of electric automobile charging station power supply system provided by the invention.The base of embodiment two in Fig. 3
On plinth, the electric automobile charging station power supply system of embodiment three further includes photovoltaic controller 406 and photovoltaic cell 411, light in Fig. 4
Volt controller 406 is separately connected DC power distribution cabinet 403 and photovoltaic cell 411.
When direct-current charging post (408,409) and alternating-current charging pile (413,414) do not access load, controlled by photovoltaic
The control of device 406, photovoltaic cell 411 can provide rechargeable electrical energy to energy-storage units 410 by photovoltaic controller 406, and, lead to
The control of DC to DC converter 405 is crossed, energy-storage units 410 are received and stored from electricity by DC to DC converter 405
The electric energy of net 401 and photovoltaic cell 411.
When direct-current charging post (408,409) and alternating-current charging pile (413,414) access load, pass through photovoltaic controller
406 control, photovoltaic cell 411 can be by photovoltaic controllers 406 to direct-current charging post (408,409) and alternating-current charging pile
(413,414) load accessed provides electric energy, and, by the control of DC to DC converter 405, energy-storage units 410 can
The load accessed by DC to DC converter 405 to direct-current charging post (408,409) and alternating-current charging pile (413,414)
Electric energy is provided.
In the third embodiment, cooperate the use of energy-storage units 410, have access to photovoltaic electric in 400V direct current supply line
Can, by the control of photovoltaic controller 406, charge using photovoltaic cell 411 to energy-storage units 410, and directly to
Charging load provides electric energy.
Fig. 5 is the example IV of electric automobile charging station power supply system provided by the invention.The base of embodiment one in Fig. 2
On plinth, in Fig. 5 the electric automobile charging station power supply system of example IV further include n DC to DC converter a (505,506),
N energy-storage units (510,511), n DC to DC converter b (513,514), photovoltaic controller 517, photovoltaic cell 519,
Rectifier 518 and wind-driven generator 520, wherein n is the positive integer greater than 1, a DC to DC converter a, an energy storage list
Member and a DC to DC converter b form one group of energy storing structure.
Photovoltaic cell 519 connects the direct-flow input end of photovoltaic controller 517, and wind-driven generator 520 connects rectifier 518
Ac input end, the DC output end of photovoltaic controller 517 and the DC output end of rectifier 518 are joined together to form can be again
Raw energy dc bus.
The first DC terminal of DC to DC converter a (such as 505) in each group of energy storing structure connects DC power distribution cabinet
503, the second DC terminal connects the energy-storage units (such as 510) in this group of energy storing structure；DC/DC in each group of energy storing structure
The first DC terminal of converter b (such as 513) also connects the energy-storage units (such as 510) in this group of energy storing structure, the second direct current
End is connected to renewable energy dc bus.
DC to DC converter a (505,506) can be realized the bi-directional of electric energy, DC to DC converter b (513,
514) it can be realized and electric energy be transferred to energy-storage units (510,511) from renewable energy dc bus.
The electric energy that photovoltaic cell 519 generates is passed on by photovoltaic controller 517 and DC to DC converter b (513,514)
It is stored to the energy-storage units (510,511) being arbitrarily designated.
The electric energy that wind-driven generator 520 generates is passed on extremely by rectifier 518 and DC to DC converter b (513,514)
The energy-storage units (510,511) being arbitrarily designated are stored.
When charging load does not access, the energy-storage units (510,511) that are arbitrarily designated by DC to DC converter a (505,
506) receive and store the electric energy from power grid 501.
When charging load accesses, the energy-storage units (510,511) being arbitrarily designated pass through the DC/DC conversion with it with group
Device a (505,506) provides electric energy to charging load.
In example IV, cooperate the use of multiple groups energy storing structure, the electricity generated by photovoltaic power generation and wind-power electricity generation
It can be stored in the energy-storage units being arbitrarily designated, while also using energy storage list without come load that charging station is adjusted flexibly, effectively
The utilization rate to solar energy, wind energy renewable energy is improved, and is conducive to ensure power grid powered stable.
As a preferred embodiment, energy-storage units of the Fig. 3 into Fig. 5 are rechargeable battery.
Fig. 6 is a kind of embodiment of ac/dc solid-state transformer provided by the invention.Exchanged in the scheme of Fig. 6/straight
Solid-state transformer is flowed for three-phase and four-line exchange input and direct current output, including A phase subelement 610, B phase subelement 620 are sub with C phase
Unit 630, each phase subelement can complete the AC to DC voltage transformation with isolation.
The first terminal of 610 ac input end mouth of A phase subelement connects power grid A phase, 610 ac input end of A phase subelement
The Second terminal of mouth connects network neutral line；The first terminal of 620 ac input end mouth of B phase subelement connects power grid B phase, B phase
The Second terminal of 620 ac input end mouth of subelement connects network neutral line；The first of 630 ac input end mouth of C phase subelement
Terminal connects power grid C phase, and the Second terminal of 630 ac input end mouth of C phase subelement connects network neutral line.A phase subelement
610, the direct current output port of B phase subelement 620 and C phase subelement 630 is in parallel.
As a preferred embodiment, A phase subelement 610, B phase subelement 620 and C phase subelement 630 include rectification mould
Block 611612, isolated DC/DC converting module, first capacitor C1 and the second capacitor C2.The exchange of rectification module 611 inputs
End connects each input terminal of the phase subelement from power grid, and DC output end connection isolated DC/direct current of rectification module 611 becomes
Change the mold the input terminal of block 612, the DC output end of rectification module 611 also shunt capacitance C1, isolated DC/DC converting module
612 output end connects the DC output end of each phase subelement, and isolated DC/DC converting module 612 output end is also simultaneously
Join capacitor C2.
Ac/dc solid-state transformer connection three phase network and direct current supply line in Fig. 6 scheme, can be electronic vapour
Vehicle charging station provides electric power,
On the basis of Fig. 6, Fig. 7 is the embodiment of each phase subelement of A, B, C in ac/dc solid-state transformer.
A, each phase subelement of B, C includes multiple isolated ACs/DC converting module 710 and filter inductance L1.
Isolated AC/DC converting module 710 includes the first H bridge being made of IGBT module Q1-Q4, by IGBT module
2nd H bridge of Q5-Q8 composition, the 3rd H bridge, capacitor C3, capacitor C4 and the high frequency transformer T1 being made of IGBT module Q9-Q12.
The first bridge arm and the second bridge arm being made of IGBT module Q2, Q4 are made of in first H bridge IGBT module Q1, Q3
Midpoint constitutes isolated AC/DC converting module 710 input port, the upper and lower ends shunt capacitance C3 of the first H bridge, and first
The upper and lower ends of H bridge are connect with the upper and lower ends of the 2nd H bridge, the first bridge arm for being made of in the 2nd H bridge IGBT module Q5, Q7 and
The port that the midpoint for the second bridge arm being made of IGBT module Q6, Q8 is formed is connect with a side ports of high frequency transformer T1,
The first bridge arm for being made of in the secondary port of high frequency transformer T2 and the 3rd H bridge IGBT module Q9, Q11 and by IGBT module
The port connection that the midpoint for the second bridge arm that Q10, Q12 are constituted is formed, the upper and lower ends shunt capacitance C4 of the 3rd H bridge, the 3rd H bridge
Upper and lower ends constitute isolated AC/DC converting module 710 output port.
Filter inductance L1 is sequentially connected in series to form each phase with multiple isolated ACs/710 input port of DC converting module
The ac input end mouth of unit, the output port parallel connection of multiple isolated ACs/DC converting module 710 form each phase subelement
Direct current output port.
The scheme of Fig. 7 improves each phase subelement of A, B, C, passes through multiple isolated ACs/DC converting module
710 connect in input side divides, and in outlet side parallel connection, the voltage that each IGBT module is born is effectively reduced, can adapt to power grid
The higher application of side voltage.
The above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair
Limitation of the invention, protection scope of the present invention should be defined by the scope defined by the claims..For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, several improvements and modifications can also be made, these change
It also should be regarded as protection scope of the present invention into retouching.
Claims (6)
1. a kind of electric automobile charging station power supply system based on solid-state transformer, comprising: ac/dc solid-state transformer, straight
Flow power distribution cabinet, DC charging cabinet, direct-current charging post, inverter, AC charging cabinet and alternating-current charging pile；
The ac/dc solid-state transformer is separately connected power grid and the DC power distribution cabinet, and the alternating voltage of power grid passes through institute
It states ac/dc solid-state transformer and is converted into 400V DC voltage；
The DC power distribution cabinet is separately connected the DC charging cabinet and the inverter, and 400V DC voltage is distributed to described
DC charging cabinet and the inverter；
The DC charging cabinet is separately connected multiple direct-current charging posts, and 400V DC voltage is supplied to each direct current
Charging pile；
The inverter connects the AC charging cabinet, and 400V DC voltage is converted to 380V AC three-phase voltage；
The AC charging cabinet is separately connected multiple alternating-current charging piles, 380V AC three-phase voltage is supplied to each described
Alternating-current charging pile；
The power supply system further include: multiple first DC to DC converter, multiple energy-storage units, multiple second DC/DC
Converter, photovoltaic controller, photovoltaic cell, rectifier and wind-driven generator；
First DC to DC converter, the energy-storage units are identical as the number of second DC to DC converter,
Wherein, first DC to DC converter, the energy-storage units and second DC/DC conversion
Device three constitutes one group of energy storing structure；
The photovoltaic cell connects the direct-flow input end of the photovoltaic controller, and the wind-driven generator connects the rectifier
The DC output end of ac input end, the DC output end of the photovoltaic controller and the rectifier is joined together to form can
Renewable sources of energy dc bus；
First DC terminal of first DC to DC converter in energy storing structure described in each group connects the DC distribution
Cabinet, the second DC terminal connect the energy-storage units in the group；
First DC terminal of second DC to DC converter in energy storing structure described in each group also connects the institute in the group
Energy-storage units are stated, the second DC terminal is connected to renewable energy dc bus；
First DC to DC converter can be realized the bi-directional of electric energy, and second DC to DC converter can
It realizes and electric energy is transferred to the energy-storage units from the renewable energy dc bus；
The electric energy that the photovoltaic cell generates by the photovoltaic controller and second DC to DC converter pass on to times
Mean that the fixed energy-storage units are stored；
The electric energy that the wind-driven generator generates is passed on by the rectifier and second DC to DC converter to any
The specified energy-storage units are stored；
First DC to DC converter is used to not access load when the direct-current charging post and/or the alternating-current charging pile
When, it controls the energy-storage units being arbitrarily designated and is received and stored from power grid by first DC to DC converter
Electric energy；
First DC to DC converter is also used to when the direct-current charging post and/or alternating-current charging pile access load
When, control the energy-storage units that are arbitrarily designated by first DC to DC converter to the direct-current charging post and/or
The load of the alternating-current charging pile provides electric energy.
2. power supply system as described in claim 1, which is characterized in that the direct-current charging post provides 400V's and/or 750V
Voltage output port.
3. power supply system as claimed in claim 1 or 2, which is characterized in that the energy-storage units are rechargeable battery.
4. power supply system as claimed in claim 1 or 2, which is characterized in that the ac/dc solid-state transformer is three-phase four
Line exchange input and direct current output, the ac/dc solid-state transformer include A phase subelement, B phase subelement and C Xiang Zidan
Member, each phase subelement can complete the AC to DC voltage transformation with isolation；
The first terminal of the A phase subelement ac input end mouth connects power grid A phase, the A phase subelement ac input end mouth
Second terminal connect network neutral line；
The first terminal of the B phase subelement ac input end mouth connects power grid B phase, the B phase subelement ac input end mouth
Second terminal connect network neutral line；
The first terminal of the C phase subelement ac input end mouth connects power grid C phase, the C phase subelement ac input end mouth
Second terminal connect network neutral line；
The direct current output port of the A phase subelement, the B phase subelement and the C phase subelement is in parallel.
5. power supply system as claimed in claim 4, which is characterized in that the A phase subelement, the B phase subelement and the C
Phase subelement includes rectification module, isolated DC/DC converting module, first capacitor and the second capacitor；
The ac input end of the rectification module connects each input terminal of the phase subelement from power grid, the direct current of the rectification module
Output end connects the isolated DC/DC converting module input terminal, and the DC output end of the rectification module is also in parallel
First capacitor, the isolated DC/DC converting module output end connect the DC output end of each phase subelement, it is described every
The output end of release DC/DC conversion module the second capacitor also in parallel.
6. power supply system as claimed in claim 4, which is characterized in that the A phase subelement, the B phase subelement and the C
Phase subelement includes multiple isolated ACs/DC converting module and filter inductance；
The isolated AC/DC converting module includes the first H bridge, the 2nd H bridge, the 3rd H bridge, third capacitor, the 4th capacitor
And high frequency transformer；
The first H bridge, the 2nd H bridge, the 3rd H bridge are made of 4 IGBT modules, the first bridge of the first H bridge
The midpoint of arm and the second bridge arm constitutes the input port of the isolated AC/DC converting module, the first H bridge up and down
The in parallel third capacitor in both ends, the upper and lower ends of the first H bridge are connect with the upper and lower ends of the 2nd H bridge, and described the
The port that the midpoint of two the first bridge arms of H bridge and the second bridge arm is formed is connect with a side ports of the high frequency transformer, described
The secondary port of high frequency transformer is connect with the port that the midpoint of the first bridge arm of the 3rd H bridge and the second bridge arm is formed, institute
State in parallel 4th capacitor of upper and lower ends of the 3rd H bridge, the upper and lower ends of the 3rd H bridge constitute the isolated AC/
The output port of DC converting module；
The filter inductance and multiple isolated ACs/DC converting module input mouth are sequentially connected in series to form each Xiang Zidan
The ac input end mouth of member, the output port parallel connection of the multiple isolated AC/DC converting modules form each phase subelement
Direct current output port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710087591.4A CN106602565B (en) | 2017-02-17 | 2017-02-17 | A kind of electric automobile charging station power supply system based on solid-state transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710087591.4A CN106602565B (en) | 2017-02-17 | 2017-02-17 | A kind of electric automobile charging station power supply system based on solid-state transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106602565A CN106602565A (en) | 2017-04-26 |
| CN106602565B true CN106602565B (en) | 2019-04-30 |
Family
ID=58587657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710087591.4A Active CN106602565B (en) | 2017-02-17 | 2017-02-17 | A kind of electric automobile charging station power supply system based on solid-state transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106602565B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107453440A (en) * | 2017-09-13 | 2017-12-08 | 国网重庆市电力公司电力科学研究院 | A kind of charging device based on electric power electric transformer |
| CN108134419A (en) * | 2017-12-25 | 2018-06-08 | 珠海银隆电器有限公司 | A kind of charging equipment charge control system and charging equipment |
| CN109560553B (en) * | 2018-12-11 | 2021-11-23 | 华北电力大学 | Switching method of switchable power module at low-voltage side of power electronic transformer |
| TWI720573B (en) * | 2019-08-07 | 2021-03-01 | 台達電子工業股份有限公司 | Power apparatus applied in sst structure and three-phase power source system having the same |
| CN112350588B (en) * | 2019-08-07 | 2023-07-25 | 台达电子工业股份有限公司 | Power supply device applied to solid-state transformer structure and three-phase power supply system |
| CN112531795A (en) * | 2019-09-17 | 2021-03-19 | 台达电子工业股份有限公司 | Carrier charging system and three-phase power supply system applied to solid-state transformer framework |
| TWI697172B (en) * | 2019-09-17 | 2020-06-21 | 台達電子工業股份有限公司 | Vehicle charging system applied in solid state transformer structure and three-phase power system having the same |
| TWI699065B (en) * | 2019-09-20 | 2020-07-11 | 台達電子工業股份有限公司 | Power system applied to solid state transformer structure with communication function and communication module applied to solid state transformer structure |
| CN112542883B (en) | 2019-09-20 | 2023-11-14 | 台达电子工业股份有限公司 | Power system with communication function for solid-state transformer structure and communication module |
| CN115693743A (en) * | 2020-02-27 | 2023-02-03 | 华为数字能源技术有限公司 | Power supply device, power supply system and data center |
| CN111251930A (en) * | 2020-03-18 | 2020-06-09 | 深圳市佳晟宇科技有限公司 | Direct current fills electric pile equipment |
| CN111614277B (en) * | 2020-05-30 | 2022-07-29 | 青岛鼎信通讯股份有限公司 | Medium-high voltage integrated automobile charging system based on series digital voltage stabilizer |
| CN116646965B (en) * | 2023-07-21 | 2024-01-23 | 深圳橙电新能源科技有限公司 | Photovoltaic energy storage charging and discharging integrated management system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202268697U (en) * | 2011-09-14 | 2012-06-06 | 厦门蓝溪科技有限公司 | Micro direct-current power grid |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201708573U (en) * | 2010-04-29 | 2011-01-12 | 中山市浩成自动化设备有限公司 | Modularization control based electric automobile charger |
| CN102290841A (en) * | 2011-08-13 | 2011-12-21 | 罗俊亚 | Peak clipping and valley filling electric vehicle swapping station for distribution network |
| CN105186669A (en) * | 2015-09-29 | 2015-12-23 | 张洪亮 | Distributed common direct current bus based wind energy and solar energy stored charging station system |
| CN105577008A (en) * | 2015-12-31 | 2016-05-11 | 东南大学 | Three-phase rectification type power electronic transformer and DC voltage coordinative control method thereof |
-
2017
- 2017-02-17 CN CN201710087591.4A patent/CN106602565B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202268697U (en) * | 2011-09-14 | 2012-06-06 | 厦门蓝溪科技有限公司 | Micro direct-current power grid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106602565A (en) | 2017-04-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106602565B (en) | A kind of electric automobile charging station power supply system based on solid-state transformer | |
| CN207234419U (en) | Looped network of DC power framework based on multiport residents energy source router | |
| CN106712024A (en) | Energy Internet for electric car charging station | |
| CN105763085B (en) | Energy storage grid-connected converter and its control method based on three level of inverse-impedance type | |
| CN102969730B (en) | A kind of control method of double stage chain type energy storage converter | |
| CN104917418B (en) | A kind of accumulation energy type MMC current transformers of use battery current independent control | |
| CN110556856A (en) | communication-independent multi-mode electric energy router and seamless switching control method thereof | |
| CN106877368A (en) | A kind of photovoltaic generation micro-grid system hybrid energy-storing control method | |
| CN104065099A (en) | AC/DC hybrid modularized microgrid network structure based on hybrid energy storage and networking method of structure | |
| CN112072716A (en) | Power distribution network terminal electric energy router and control method thereof | |
| CN102916435B (en) | A kind of battery energy storage power conversion system containing Z source network and control method thereof | |
| WO2012010053A1 (en) | Transformer-less static synchronous compensator (statcom) topological structure based on modular multilevel converter (mmc) | |
| CN105356774A (en) | Converter used for hybrid energy storage system | |
| CN109888786A (en) | A kind of control method of alternating current-direct current mixing micro-capacitance sensor | |
| WO2012010055A1 (en) | Topology for modular multilevel converter-based transformerless inductance energy-saving | |
| CN104795981A (en) | Current ripple active restraining method of DC-grid-connection-operation hybrid micro-grid bidirectional transducers | |
| CN103236713B (en) | Micro-grid network, method for controlling same and bidirectional converter for micro-grid | |
| CN113489326A (en) | Two-stage DC/AC bidirectional conversion device applied to energy router | |
| CN108448918A (en) | A kind of single-phase grid-connected photovoltaic DC-to-AC converter of transless | |
| CN115663865A (en) | Energy storage system | |
| CN107425733A (en) | A kind of low-voltage electric energy router topology and control method | |
| CN106357139A (en) | Efficient light-storing combined self-feeding type energy-storing converter | |
| CN207010553U (en) | A kind of multiport hybrid power electronic transformer based on MMC | |
| CN113271029A (en) | DAB type single-stage bidirectional AC/DC converter with low voltage stress and wide output range | |
| CN110535133A (en) | A kind of flexibility multimode switching device and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |