CN106602565A - Electric vehicle charging station power supply system based on solid-state transformer - Google Patents
Electric vehicle charging station power supply system based on solid-state transformer Download PDFInfo
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- CN106602565A CN106602565A CN201710087591.4A CN201710087591A CN106602565A CN 106602565 A CN106602565 A CN 106602565A CN 201710087591 A CN201710087591 A CN 201710087591A CN 106602565 A CN106602565 A CN 106602565A
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- 238000007600 charging Methods 0.000 title claims abstract description 155
- 238000004146 energy storage Methods 0.000 claims abstract description 66
- 238000009826 distribution Methods 0.000 claims abstract description 19
- 230000001172 regenerating effect Effects 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 230000007935 neutral effect Effects 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 7
- 238000002955 isolation Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- 230000006641 stabilisation Effects 0.000 abstract description 2
- 238000011105 stabilization Methods 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000033228 biological regulation Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007850 degeneration Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 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
- 230000000452 restraining effect Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- 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
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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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- H02J3/383—
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- H02J3/386—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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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
- 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
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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
- 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
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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
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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
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
Abstract
The invention discloses an electric vehicle charging station power supply system based on a solid-state transformer. The system comprises an alternating-current/direct-current solid-state transformer, a direct-current power distribution cabinet, a direct-current charging cabinet, a direct-current charging pile, an inverter, an alternating-current charging cabinet, an alternating-current charging pile and other equipment. In the system, a power supply line, where a 400V direct current as a main portion, is set and is connected to a power grid through the alternating-current/direct-current solid-state transformer. During an electric vehicle charging process, an influence of a generated harmonic wave on power-grid electric energy quality is effectively restrained and a power factor is effectively increased so that energy saving and consumption reduction are realized and structures of a power supply system and charging equipment are simplified. Based on that, because of an application of an energy storage unit, a power grid load can be effectively regulated and controlled, which is good for power supply stabilization; and because that the alternating-current/direct-current solid-state transformer and the power supply line where the 400V direct current as the main portion are arranged, access of renewable energy sources of solar energy, wind energy and the like can be convenient.
Description
Technical field
The present invention relates to electric automobile charging station power supply technique field, more particularly to a kind of based on the electronic of solid-state transformer
Vehicle charging station electric power system.
Background technology
Typical electric automobile charging station electric power system is as shown in Figure 1 at present.Transformator 102 is connected to electrical network 101 and obtains
380V three-phase alternating currents are that the equipment such as the charging load of electric automobile charging station and communication, illumination are powered.Low-tension switch cabinet 103
Connect multiple alternating-current charging piles 106 and multiple DC charging cabinets 107, electric energy is provided for charging load.Alternating-current charging pile 106 can be
Electric automobile provides 220V AC charging voltages, is charged for exchange at a slow speed.Electric energy is further assigned to by DC charging cabinet 107
380V three-phase alternating currents are converted into 400V and 750V DC voltages by multiple direct-current charging posts 108, direct-current charging post 108, can be
Electric automobile provides direct current quick charge voltage.In addition, 380V three-phase AC lines are also connected with compensation equipment 105, for idle
Compensation and raising power factor, to meet the requirement for accessing electrical network.
Existing electric automobile charging station electric power system adopts traditional power transformer and with 380V three-phase alternating currents is
Main supply line, which is disadvantageous in that：
(1) as charging electric vehicle is nonlinear load, will be simultaneously to electrical network harmonic electric current in charging process
The electrical network quality of power supply is caused to decline, grid loss increases and power transmission and transforming equipment normal capacity takes.Using traditional power transformer
Device can not be isolated and be administered to the harmonic wave of generation when being accessed electrical network, therefore, need to add harmonic wave to control in charger
Reason module, and need to set up reactive-load compensation equipment in supply line, improve the power factor for accessing grid nodes.However,
According to existing electric power system structure, each charging pile is required for arranging harmonic wave control module, controls to obtain preferable harmonic wave
Reason effect, the cost of corresponding charging pile will be dramatically increased.In addition, to obtain preferably free compensation effect with stable section
Point voltage, the compensation capacity of reactive-load compensation equipment are also required to be changed according to loading condition, and corresponding compensation equipment control is multiple
Miscellaneous, equipment manufacturing cost is also accordingly improved.
(2) charging of electric automobile is particularly direct current quick charge and will bring substantial amounts of variation to network load, is unfavorable for
Keep power supply stable.
(3) existing electric power system inconvenience accesses regenerative resource.In the presence of solar energy, this kind of regenerative resource of wind energy
Degeneration, intermittence and being difficult to such as predicts at the inherent characteristicses, existing electric power system using traditional power transformer do not possess voltage tune
Whole function, it is difficult to which control accesses the node voltage of electrical network and keeps stable.Further, since adopting based on 380V three-phase alternating currents
Supply line, solar energy, wind energy need when accessing inverter by DC inverter be alternating current to be incorporated to supply line, for can
The conversion of the renewable sources of energy, the control for storing and utilizing will be extremely complex, it is difficult to carries out practical application.
The content of the invention
In view of this, the present invention provides a kind of electric automobile charging station electric power system based on solid-state transformer, the system
The supply line that is provided with based on 400V direct currents and electrical network is accessed by ac/dc solid-state transformer, effectively suppress electricity
Impact of the harmonic wave produced in motor-car charging process to the electrical network quality of power supply, effectively improves power factor, so as to realize that energy-conservation drops
Consumption, and the structure of electric power system and charger is simplified, on this basis, the application of energy-storage units can be carried out to network load
Effective Regulation, is conducive to power supply stable, the setting of ac/dc solid-state transformer and the supply line based on 400V direct currents
Also allow for the access of the regenerative resources such as solar energy, wind energy.
To solve above technical problem, the invention provides a kind of electric automobile charging station based on solid-state transformer is powered
System, including：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 connects electrical network and the DC power distribution cabinet respectively, and the alternating voltage of electrical network leads to
Cross the ac/dc solid-state transformer and be converted into 400V DC voltages；
The DC power distribution cabinet connects the DC charging cabinet and the inverter respectively, by 400V DC voltages distribute to
The DC charging cabinet and the inverter；
The DC charging cabinet connects multiple direct-current charging posts respectively, and 400V DC voltages are supplied to described in each
Direct-current charging post；
The inverter connects the AC charging cabinet, and 400V DC voltages are converted to 380V AC three-phase voltages；
The AC charging cabinet connects multiple alternating-current charging piles respectively, and 380V AC three-phase voltages are supplied to each
The alternating-current charging pile.
As a kind of preferred, the voltage output port of the direct-current charging post offer 400V and/or 750V.
As one kind preferably, the electric power system also includes：First DC to DC converter and energy-storage units；
First DC to DC converter connects the DC power distribution cabinet and the energy-storage units respectively, and described first
DC to DC converter can realize the bi-directional of electric energy；
First DC to DC converter is used to bear when the direct-current charging post and/or the alternating-current charging pile are accessed
During 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 that charging pile is accessed provides electric energy.
Used as a kind of improvement, first DC to DC converter is additionally operable to when the direct-current charging post and/or the friendship
When current charge stake does not access load, control the energy-storage units received by first DC to DC converter and store come
From the electric energy of electrical network.
Used as another kind of improvement, the electric power system also includes：Photovoltaic controller and photovoltaic cell；
The photovoltaic controller connects the DC power distribution cabinet and the photovoltaic cell respectively；
The photovoltaic controller for when the direct-current charging post and/or the alternating-current charging pile access load, control
The photovoltaic cell is carried to the load that the direct-current charging post and/or the alternating-current charging pile are accessed by the photovoltaic controller
For electric energy；
The photovoltaic controller is additionally operable to when the direct-current charging post and/or the alternating-current charging pile do not access load,
Control the photovoltaic cell and provide rechargeable electrical energy to the energy-storage units by the photovoltaic controller；
First DC to DC converter is additionally operable to not connect when the direct-current charging post and/or the alternating-current charging pile
When entering to load, control the energy-storage units and received by first DC to DC converter and stored from electrical network and/or light
The electric energy of volt battery.
As one kind preferably, described electric power system also includes：Multiple first DC to DC converter, multiple energy storage lists
First, multiple second DC to DC converter, photovoltaic controller, photovoltaic cell, commutator 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 commutator links together shape
Into regenerative resource 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 regenerative resource dc bus；
First DC to DC converter can realize the bi-directional of electric energy, second DC to DC converter
Can realize for electric energy being transferred to the energy-storage units from the regenerative resource dc bus；
The electric energy that the photovoltaic cell is produced passes through the photovoltaic controller and second DC to DC converter is passed on
Stored to the energy-storage units being arbitrarily designated；
The electric energy that the wind-driven generator is produced by the commutator 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
During load, the energy-storage units for controlling to be arbitrarily designated are received by first DC to DC converter and are stored from electricity
The electric energy of net；
First DC to DC converter is additionally operable to access when the direct-current charging post and/or the alternating-current charging pile
During load, the energy-storage units for controlling to be arbitrarily designated 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 one kind preferably, the energy-storage units are rechargeable battery.
As one kind preferably, the ac/dc solid-state transformer is that three-phase and four-line exchange is input into and direct current output, described
Ac/dc solid-state transformer includes A phase subelements, B phases subelement and C phase subelements, and each phase subelement can complete band
The AC to DC voltage conversion of isolation；
The first terminal connection electrical network A phases of the A phases subelement ac input end mouth, the A phases subelement exchange input
The Second terminal connection network neutral line of port；
The first terminal connection electrical network B phases of the B phases subelement ac input end mouth, the B phases subelement exchange input
The Second terminal connection network neutral line of port；
The first terminal connection electrical network C phases of the C phases subelement ac input end mouth, the C phases subelement exchange input
The Second terminal connection network neutral line of port；
The direct current output port of the A phases subelement, the B phases subelement and the C phases subelement is in parallel.
As one kind preferably, the A phases subelement, the B phases subelement and the C phases subelement include rectification mould
Block, isolated DC/DC converting module, the first electric capacity and the second electric capacity；
The ac input end of the rectification module connects input of each phase subelement from electrical network, the rectification module
DC output end connects the input of the isolated DC/DC converting module, and the DC output end of the rectification module is also
First electric capacity in parallel, the outfan of the isolated DC/DC converting module connect the DC output end of each phase subelement, institute
State outfan second electric capacity also in parallel of isolated DC/DC converting module.
Used as a kind of improvement, the A phases subelement, the B phases subelement and the C phases subelement include multiple isolation
Type ac/dc conversion module and filter inductance；
The isolated AC/DC converting module include a H bridges, the 2nd H bridges, the 3rd H bridges, the 3rd electric capacity, the 4th
Electric capacity and high frequency transformer；
The first H bridges, the 2nd H bridges, the 3rd H bridges are constituted by 4 IGBT modules, a H bridges
The midpoint of one bridge arm and the second bridge arm constitutes the input port of the isolated AC/DC converting module, a H bridges
Upper and lower ends the 3rd electric capacity in parallel, the upper and lower ends of a H bridges are connected with the upper and lower ends of the 2nd H bridges, institute
The port for stating the midpoint formation of the 2nd the first bridge arm of H bridges and the second bridge arm is connected with a side ports of the high frequency transformer,
The secondary port of the high frequency transformer is connected with the port of the midpoint formation of the first bridge arm of the 3rd H bridges and the second bridge arm
Connect, upper and lower ends the 4th electric capacity in parallel of the 3rd H bridges, the upper and lower ends of the 3rd H bridges constitute the isolated form
The output port of ac/dc conversion module；
The filter inductance is sequentially connected in series and to form each phase with multiple isolated ACs/DC converting module input mouth
The ac input end mouth of subelement, the output port of the multiple isolated AC/DC converting modules is in parallel to form each mutually son
The direct current output port of unit.
The invention has benefit that：
(1) solid-state transformer itself has the advantages that small volume, lightweight, non-environmental-pollution, easy care, and the present invention is used
Ac/dc solid-state transformer, on the one hand, the flexible of grid side electric current and power can be realized, it is ensured that be always ensured that
Grid side electric current is sinusoidal wave form, with the function to grid side power factor regulation, the harmonic wave that produces when charging can be avoided with
And the power quality problem that power factor declines travels to grid side, so as to ensure that electrical network is powered stable and reduces current supply loss；
On the other hand, supply line of the electrical network by ac/dc solid-state transformer into charging station based on 400V direct currents powers, and hands over
Stream/DC solid transformator can ensure that charging station side supply voltage is stable；Additionally, being had by ac/dc solid-state transformer
To grid side power factor regulation and the good result of harmonics restraint, in electric power system reactive-load compensation can not be used to set
Standby, charger can also weaken the requirement to harmonic restraining function, can effectively simplify the structure of electric power system and charger, drop
Low construction cost.
(2) access of energy-storage units is easy in the supply line in charging station based on 400V direct currents, thus can be adjusted flexibly
The load condition of charging station, utilizes energy-storage units energy storage in idle, is coordinated with electrical network using energy-storage units when charging load is big
Power to the load simultaneously, effectively alleviate network load and change the impact stably caused to power supply in a large number.
(3) access of regenerative resource is easy in the supply line in charging station based on 400V direct currents, coordinates energy-storage units
Use, electric automobile is charged using solar energy, wind energy, effectively improves the utilization rate of regenerative resource.
Description of the drawings
Fig. 1 is electric automobile charging station electric power system of the prior art.
The electric automobile charging station electric power system embodiment one that Fig. 2 is provided for the present invention.
The electric automobile charging station electric power system embodiment two that Fig. 3 is provided for the present invention.
The electric automobile charging station electric power system embodiment three that Fig. 4 is provided for the present invention.
The electric automobile charging station electric power system example IV that Fig. 5 is provided for the present invention.
The embodiment of the ac/dc solid-state transformer that Fig. 6 is provided for the present invention.
The embodiment of each phase subelement of A, B, C in the ac/dc solid-state transformer that Fig. 7 is provided for the present invention.
Specific embodiment
In order that those skilled in the art more fully understands technical scheme, with reference to specific embodiment
The present invention is described in further detail.
The embodiment one of the electric automobile charging station electric power system that Fig. 2 is provided for the present invention.Electricity based on solid-state transformer
Electrical automobile charging station electric power system includes：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 transformator 202 connects electrical network 201 and DC power distribution cabinet 203 respectively, and the alternating voltage of electrical network 201 passes through ac/dc solid-state
Transformator 202 is converted into 400V DC voltages.DC power distribution cabinet 203 connects DC charging cabinet 204 and inverter 205 respectively, will
400V DC voltages distribute to DC charging cabinet 204 and inverter 205.DC charging cabinet 204 connects multiple DC chargings respectively
Stake (206,207), 400V DC voltages are supplied to each direct-current charging post.
400V DC voltages are converted to 380V AC three-phase voltages by the connection AC charging of inverter 205 cabinet 208.
AC charging cabinet 208 connects multiple alternating-current charging piles 210 respectively, and 380V AC three-phase voltages are supplied to each friendship
Current charge stake.
Due to the use of ac/dc solid-state transformer 202, it is possible to achieve the flexible of grid side electric current and power,
Guarantee is always ensured that grid side electric current is sinusoidal wave form, with the function to grid side power factor regulation, when can avoid charging
The power quality problem that the harmonic wave of generation and power factor decline travels to grid side, so as to ensure that electrical network is powered stable and drops
Low current supply loss.Ac/dc solid-state transformer 202 can also ensure charging station side 400V direct current supply voltage stabilizations.
As a kind of preferred version, and direct-current charging post (206,207) the voltage output port of 400V and/or 750V is provided.
The embodiment two of the electric automobile charging station electric power system that Fig. 3 is provided for the present invention.The base of embodiment one in fig. 2
On plinth, in Fig. 3, the electric automobile charging station electric power system of embodiment two also includes DC to DC converter 305 and energy-storage units
309.DC to DC converter 305 connects DC power distribution cabinet 303 and energy-storage units 309,305 energy of DC to DC converter respectively
The bi-directional of electric energy is realized enough.
When direct-current charging post (307,308) and alternating-current charging pile (311,312) access load when, by DC-DC
The control of changer 305, energy-storage units 309 can by DC to DC converter 305 to direct-current charging post (307,308) with
And alternating-current charging pile (311, the load offer electric energy for 312) accessing.
When direct-current charging post (307,308) and alternating-current charging pile (311, when 312) not accessing load, by direct current/straight
The control of current converter 305, energy-storage units 309 can be received and be stored from electrical network 301 by DC to DC converter 305
Electric energy.
The use of energy-storage units 309 can adjust electric automobile charging station for the load of electrical network, utilize energy storage in idle
Unit energy storage, is coordinated with electrical network using energy-storage units when charging load is big and is powered to the load simultaneously, is slowed down a large amount of loads and is accessed
And during direct current quick charge electrical network load change, be conducive to ensureing that the power supply of electrical network is stable.
The embodiment three of the electric automobile charging station electric power system that Fig. 4 is provided for the present invention.The base of embodiment two in figure 3
On plinth, in Fig. 4, the electric automobile charging station electric power system of embodiment three also includes photovoltaic controller 406 and photovoltaic cell 411, light
Volt controller 406 connects DC power distribution cabinet 403 and photovoltaic cell 411 respectively.
When direct-current charging post (408,409) and alternating-current charging pile (413, when 414) not accessing load, by photovoltaic control
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 when, by photovoltaic controller
406 control, photovoltaic cell 411 can by photovoltaic controller 406 to direct-current charging post (408,409) and alternating-current charging pile
(413, the load for 414) accessing provides electric energy, and, by the control of DC to DC converter 405, energy-storage units 410 can
By DC to DC converter 405 to direct-current charging post (408,409) and alternating-current charging pile (413, the load for 414) accessing
Electric energy is provided.
In embodiment three, coordinate the use of energy-storage units 410, in 400V direct current supply lines, have access to photovoltaic electric
Can, by the control of photovoltaic controller 406, energy-storage units 410 are charged using photovoltaic cell 411, and directly to
Charging load provides electric energy.
The example IV of the electric automobile charging station electric power system that Fig. 5 is provided for the present invention.The base of embodiment one in fig. 2
On plinth, in Fig. 5 the electric automobile charging station electric power system of example IV also including 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,
Commutator 518 and wind-driven generator 520, wherein n is the positive integer more than 1, DC to DC converter a, an energy storage list
Unit 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, the connection commutator 518 of wind-driven generator 520
Ac input end, the DC output end of the DC output end and commutator 518 of photovoltaic controller 517 is joined together to form can be again
Raw energy dc bus.
The first DC terminal connection DC power distribution cabinet of the DC to DC converter a (such as 505) in each group of energy storing structure
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
First DC terminal of changer 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 regenerative resource dc bus.
DC to DC converter a (505,506) can realize the bi-directional of electric energy, DC to DC converter b (513,
514) can realize by electric energy from regenerative resource dc bus be transferred to energy-storage units (510,511).
The electric energy that photovoltaic cell 519 is produced pass through photovoltaic controller 517 and DC to DC converter b (513,514) pass on
To be arbitrarily designated energy-storage units (510,511) stored.
The electric energy that wind-driven generator 520 is produced pass through commutator 518 and DC to DC converter b (513,514) pass on to
Be arbitrarily designated energy-storage units (510,511) stored.
When charging load is not accessed, the energy-storage units that are arbitrarily designated (510,511) by DC to DC converter a (505,
506) receive and store the electric energy from electrical network 501.
Charging load access when, be arbitrarily designated energy-storage units (510,511) by with its with group DC/DC conversion
Device a (505,506) electric energy is provided to charging load.
In example IV, coordinate the use of multigroup energy storing structure, the electricity produced by photovoltaic generation and wind-power electricity generation
Can be stored in the energy-storage units being arbitrarily designated, while also using energy storage list without the load of charging station is adjusted flexibly, effectively
Improve to solar energy, the utilization rate of wind energy regenerative resource, and it is stable to be conducive to guarantee electrical network to power.
Used as a kind of preferred version, the energy-storage units in Fig. 3 to Fig. 5 are rechargeable battery.
A kind of embodiment of the ac/dc solid-state transformer that Fig. 6 is provided for the present invention.Exchange in the scheme of Fig. 6/straight
Stream solid-state transformer is that three-phase and four-line exchange is input into and direct current output, including A phases subelement 610, B phases subelement 620 are sub with C phases
Unit 630, each phase subelement can complete the conversion of the AC to DC voltage with isolation.
The first terminal connection electrical network A phases of 610 ac input end mouth of A phases subelement, 610 ac input end of A phases subelement
The Second terminal connection network neutral line of mouth；The first terminal connection electrical network B phases of 620 ac input end mouth of B phases subelement, B phases
The Second terminal connection network neutral line of 620 ac input end mouth of subelement；The first of 630 ac input end mouth of C phases subelement
Terminal connects electrical network C phases, the Second terminal connection network neutral line of 630 ac input end mouth of C phases subelement.A phase subelements
610th, the direct current output port of B phases subelement 620 and C phases subelement 630 is in parallel.
Used as a kind of preferred version, A phases subelement 610, B phases subelement 620 and C phases subelement 630 include rectification mould
Block 611612, isolated DC/DC converting module, the first electric capacity C1 and the second electric capacity C2.The exchange input of rectification module 611
Input of the connection each phase subelement in end from electrical network, the DC output end connection isolated DC/direct current of rectification module 611 become
The input of mold changing block 612, the DC output end also shunt capacitance C1 of rectification module 611, isolated DC/DC converting module
612 outfan connects the DC output end of each phase subelement, and the outfan of isolated DC/DC converting module 612 is also simultaneously
Connection electric capacity C2.
Ac/dc solid-state transformer connection three phase network and direct current supply line in Fig. 6 schemes, can be electronic vapour
Car 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.
The each phase subelement of A, B, C includes multiple isolated ACs/DC converting module 710 and filter inductance L1.
Isolated AC/DC converting module 710 includes the H bridges being made up of IGBT module Q1-Q4, by IGBT module
2nd H bridges of Q5-Q8 compositions, the 3rd H bridges, electric capacity C3, electric capacity C4 and the high frequency transformer T1 that are made up of IGBT module Q9-Q12.
The first bridge arm is made up of in first H bridges IGBT module Q1, Q3 and the second bridge arm for being made up of IGBT module Q2, Q4
The input port of midpoint composition isolated AC/DC converting module 710, the upper and lower ends shunt capacitance C3 of a H bridges, first
The upper and lower ends of H bridges are connected with the upper and lower ends of the 2nd H bridges, the first bridge arm for being made up of IGBT module Q5, Q7 in the 2nd H bridges and
The port that the midpoint of the second bridge arm being made up of IGBT module Q6, Q8 is formed is connected with a side ports of high frequency transformer T1,
The first bridge arm for being made up of IGBT module Q9, Q11 in the secondary port of high frequency transformer T2 and the 3rd H bridges and by IGBT module
The port connection that the midpoint of the second bridge arm that Q10, Q12 are constituted is formed, the upper and lower ends shunt capacitance C4 of the 3rd H bridges, the 3rd H bridges
Upper and lower ends constitute isolated AC/DC converting module 710 output port.
Filter inductance L1 is sequentially connected in series to form each mutually son with multiple isolated ACs/710 input port of DC converting module
The ac input end mouth of unit, the output port of multiple isolated ACs/DC converting module 710 is in parallel to form each phase subelement
Direct current output port.
The scheme of Fig. 7 is improved to each phase subelement of A, B, C, by multiple isolated ACs/DC converting module
710, in input side series connection partial pressure, in outlet side parallel connection, effectively reduce the voltage that each IGBT module is born, can adapt to electrical network
The higher application scenario of side voltage.
The above is only the preferred embodiment of the present invention, it is noted that it is right that above-mentioned preferred implementation is not construed as
The restriction of the present invention, protection scope of the present invention should be defined by claim limited range.For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, some improvements and modifications can also be made, these change
Enter and retouch also to should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of electric automobile charging station electric power system based on solid-state transformer, including：It is ac/dc solid-state transformer, straight
Stream 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 connects electrical network and the DC power distribution cabinet respectively, and the alternating voltage of electrical network passes through institute
State ac/dc solid-state transformer and be converted into 400V DC voltages；
The DC power distribution cabinet connects the DC charging cabinet and the inverter respectively, and 400V DC voltages are distributed to described
DC charging cabinet and the inverter；
The DC charging cabinet connects multiple direct-current charging posts respectively, and 400V DC voltages are supplied to direct current each described
Charging pile；
The inverter connects the AC charging cabinet, and 400V DC voltages are converted to 380V AC three-phase voltages；
The AC charging cabinet connects multiple alternating-current charging piles respectively, and 380V AC three-phase voltages are supplied to described in each
Alternating-current charging pile.
2. electric power system as claimed in claim 1, it is characterised in that the direct-current charging post provides 400V's and/or 750V
Voltage output port.
3. electric power system as claimed in claim 1, it is characterised in that also include：First DC to DC converter and energy storage list
Unit；
First DC to DC converter connects the DC power distribution cabinet and the energy-storage units respectively, and first direct current/
DC converter can realize the bi-directional of electric energy；
First DC to DC converter for when the direct-current charging post and/or the alternating-current charging pile access load,
The energy-storage units are controlled by first DC to DC converter to the direct-current charging post and/or the AC charging
The load that staking enters provides electric energy.
4. electric power system as claimed in claim 3, it is characterised in that first DC to DC converter is additionally operable to work as institute
State direct-current charging post and/or when the alternating-current charging pile does not access load, control the energy-storage units by first direct current/
DC converter is received and stores the electric energy from electrical network.
5. electric power system as claimed in claim 3, it is characterised in that also include：Photovoltaic controller and photovoltaic cell；
The photovoltaic controller connects the DC power distribution cabinet and the photovoltaic cell respectively；
The photovoltaic controller is for when the direct-current charging post and/or the alternating-current charging pile access load, control is described
Photovoltaic cell provides electricity to the load that the direct-current charging post and/or the alternating-current charging pile are accessed by the photovoltaic controller
Energy；
The photovoltaic controller is additionally operable to when the direct-current charging post and/or the alternating-current charging pile do not access load, control
The photovoltaic cell provides rechargeable electrical energy to the energy-storage units by the photovoltaic controller；
First DC to DC converter be additionally operable to when the direct-current charging post and/or the alternating-current charging pile do not access it is negative
During load, control the energy-storage units and received by first DC to DC converter and stored from electrical network and/or photovoltaic electric
The electric energy in pond.
6. electric power system as claimed in claim 1, it is characterised in that also include：It is multiple first DC to DC converter, many
Individual energy-storage units, multiple second DC to DC converter, photovoltaic controller, photovoltaic cell, commutator and wind-driven generator；
First DC to DC converter, the energy-storage units are identical with 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 commutator
The DC output end of ac input end, the DC output end of the photovoltaic controller and the commutator 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 regenerative resource dc bus；
First DC to DC converter can realize the bi-directional of electric energy, and second DC to DC converter can
Electric energy is transferred to the energy-storage units from the regenerative resource dc bus by realization；
The electric energy that the photovoltaic cell is produced 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 is produced is passed on to any by the commutator and second DC to DC converter
The energy-storage units specified 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, the energy-storage units for controlling to be arbitrarily designated are received by first DC to DC converter and are stored from electrical network
Electric energy；
First DC to DC converter is additionally operable to access load when the direct-current charging post and/or the alternating-current charging pile
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.
7. the electric power system as described in any one of claim 3 to 6, it is characterised in that the energy-storage units are rechargeable battery.
8. the electric power system as described in any one of claim 1 to 6, it is characterised in that the ac/dc solid-state transformer is
Three-phase and four-line exchange input and direct current output, the ac/dc solid-state transformer include A phase subelements, B phases subelement and C
Phase subelement, each phase subelement can complete the conversion of the AC to DC voltage with isolation；
The first terminal connection electrical network A phases of the A phases subelement ac input end mouth, the A phases subelement ac input end mouth
Second terminal connection network neutral line；
The first terminal connection electrical network B phases of the B phases subelement ac input end mouth, the B phases subelement ac input end mouth
Second terminal connection network neutral line；
The first terminal connection electrical network C phases of the C phases subelement ac input end mouth, the C phases subelement ac input end mouth
Second terminal connection network neutral line；
The direct current output port of the A phases subelement, the B phases subelement and the C phases subelement is in parallel.
9. electric power system as claimed in claim 8, it is characterised in that the A phases subelement, the B phases subelement and the C
Phase subelement includes rectification module, isolated DC/DC converting module, the first electric capacity and the second electric capacity；
The ac input end of the rectification module connects input of each phase subelement from electrical network, the direct current of the rectification module
Outfan connects the input of the isolated DC/DC converting module, and the DC output end of the rectification module is also in parallel
First electric capacity, the outfan of the isolated DC/DC converting module connect the DC output end of each phase subelement, it is described every
The outfan of release DC/DC conversion module the second electric capacity also in parallel.
10. electric power system as claimed in claim 8, it is characterised in that the A phases subelement, the B phases subelement and described
C phases subelement includes multiple isolated ACs/DC converting module and filter inductance；
The isolated AC/DC converting module includes a H bridges, the 2nd H bridges, the 3rd H bridges, the 3rd electric capacity, the 4th electric capacity
And high frequency transformer；
The first H bridges, the 2nd H bridges, the 3rd H bridges are constituted by 4 IGBT modules, the first bridge of a H bridges
The midpoint of arm and the second bridge arm constitutes the input port of the isolated AC/DC converting module, a H bridges it is upper and lower
In parallel 3rd electric capacity in two ends, the upper and lower ends of a H bridges are connected with the upper and lower ends of the 2nd H bridges, and described the
The port that the midpoint of two the first bridge arms of H bridges and the second bridge arm is formed is connected with a side ports of the high frequency transformer, described
The port that the secondary port of high frequency transformer is formed with the midpoint of the first bridge arm of the 3rd H bridges and the second bridge arm is connected, institute
State in parallel 4th electric capacity of upper and lower ends of the 3rd H bridges, the upper and lower ends of the 3rd H bridges constitute the isolated AC/
The output port of DC converting module；
The filter inductance is sequentially connected in series to form each mutually son list with multiple isolated ACs/DC converting module input mouth
The ac input end mouth of unit, the output port of the multiple isolated AC/DC converting modules is in parallel to form each phase subelement
Direct current output port.
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| 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 |
| CN109560553A (en) * | 2018-12-11 | 2019-04-02 | 华北电力大学 | A kind of switching method of electric power electric transformer low-pressure side switchable power module |
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| CN111614277A (en) * | 2020-05-30 | 2020-09-01 | 青岛鼎信通讯股份有限公司 | Medium-high voltage integrated automobile charging system based on serial digital voltage stabilizer |
| 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 |
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