CN107612408A - A kind of energy accumulation current converter and energy-storage system - Google Patents
A kind of energy accumulation current converter and energy-storage system Download PDFInfo
- Publication number
- CN107612408A CN107612408A CN201710812862.8A CN201710812862A CN107612408A CN 107612408 A CN107612408 A CN 107612408A CN 201710812862 A CN201710812862 A CN 201710812862A CN 107612408 A CN107612408 A CN 107612408A
- Authority
- CN
- China
- Prior art keywords
- power
- power conversion
- energy
- conversion unit
- switch
- 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.)
- Granted
Links
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of energy accumulation current converter and energy-storage system.The energy accumulation current converter includes：Several power conversion units and corresponding power supply unit；Power conversion unit includes control module, and the exchange end of power conversion unit is used to connect the first power network, and the DC terminal of power conversion unit is used to connect an energy storage device；Control module is used to connect energy storage device；Power supply unit includes：Direct current supply submodule, the first diode, Alternating Current Power Supply submodule；The input of direct current supply submodule is used to connect energy storage device, and output end is with after the first Diode series, the control module of power conversion unit is connected in parallel with the output end of Alternating Current Power Supply submodule；The input of Alternating Current Power Supply submodule is used to connect the first power network；Direct current supply submodule is used for the control module output first voltage to power conversion unit, and Alternating Current Power Supply submodule is used for the control module output second voltage to power conversion unit；Wherein, first voltage is less than second voltage.
Description
Technical field
The present invention relates to technical field of energy storage, more particularly to a kind of energy accumulation current converter and energy-storage system.
Background technology
Energy-storage system can realize the AC-DC conversion between energy-storage battery and power network, and this relies primarily on energy accumulation current converter
What this nucleus equipment was realized.Energy accumulation current converter can complete the bi-directional energy flow between energy-storage battery and power network, generally have
Multiple-working mode, such as grid-connected charging, grid-connected electric discharge, active input and output, idle input and output, off-network charging and off-network are put
Electricity etc..Energy accumulation current converter no matter be intended under which kind of pattern can normal work, this just needs the power supply mode of high reliability, made
Must be powered to energy accumulation current converter power supply can not interrupt under any pattern.And the power network power supply being connected with energy accumulation current converter
It is possible to interrupt, it is simple using power network power supply and unreliable；The electric energy of energy-storage battery is most valuable, and cost is higher, long-term off-network
The situation for power shortage occur is also easy to during work, influences battery life, thus it is single also uneconomical to one's profit for power taking from battery；Large Copacity
Energy accumulation current converter uses modularization concatenation technology, and power model is numerous, it is difficult to give all modular unit controls with a power supply
Device processed and other supporting power supply for electrical equipment.
Therefore, in order to ensure the normal work of Large Copacity energy accumulation current converter, it is necessary to more excellent power supply power supply technique scheme,
Improve the power supply power supply reliability of energy accumulation current converter.
The content of the invention
In view of the above problems, it is proposed that the present invention so as to provide one kind overcome above mentioned problem or at least in part solve on
State the energy accumulation current converter and energy-storage system of problem.
According to an aspect of the invention, there is provided a kind of energy accumulation current converter, including：
Several power conversion units, and power supply unit corresponding with each power conversion unit difference；
The power conversion unit includes control module, and the exchange end of the power conversion unit is used to connect the first electricity
Net, the DC terminal of the power conversion unit are used to connect an energy storage device；The control module is described for connecting
Energy storage device；The control module include it is following in one or more：Cell controller, battery management system, signal
Sample conversion module；
Said supply unit includes：Direct current supply submodule, the first diode, Alternating Current Power Supply submodule；
The input of the direct current supply submodule is used to connect the energy storage device, output end and the described 1st
After pole pipe series connection, the control module of the power conversion unit is connected in parallel with the output end of the Alternating Current Power Supply submodule；
The input of the Alternating Current Power Supply submodule is used to connect first power network；
The direct current supply submodule is used for the control module output first voltage to the power conversion unit, the friendship
Stream power supply submodule is used for the control module output second voltage to the power conversion unit；Wherein, the first voltage is small
In the second voltage.
Alternatively, the direct current supply submodule includes：First fuse, DC/DC modules, second fuse；
The first end of the first fuse be used for be connected with the positive pole of the energy storage device, the second end with it is described
The positive pole connection of DC/DC module inputs；
The first end of the second fuse be used for be connected with the negative pole of the energy storage device, the second end with it is described
The negative pole connection of DC/DC module inputs；
The positive pole of the DC/DC modules output end connects the control of the power conversion unit by first diode
Module, the negative pole of the DC/DC modules output end are directly connected to the control module of the power conversion unit.
Alternatively, the Alternating Current Power Supply submodule includes the first transformer and rectification module, the original of first transformer
Side be used for connect first power network, secondary is connected with the exchange end of the rectification module, the DC terminal of the rectification module and
The control module connection of the power conversion unit.
Alternatively, the energy accumulation current converter also includes：Grid-connected reactor；
Several described power conversion units are cascaded into some power conversion links；
The grid-connected reactor includes some branch roads, and the first end of each branch road is respectively used to connect one phase of the first power network
The port of position, the second end of each branch road connects a power conversion link respectively.
Alternatively, the power conversion unit also includes first switch, second switch, current-limiting resistance, H-bridge circuit and LCL
Circuit；
The first end of the first switch is used for the positive pole for connecting the energy storage device, and the second end passes through the current limliting
Resistance connects the first end of the first inductance of the LCL circuits；
The first end of the second switch is used for the positive pole for connecting the energy storage device, and the second end is directly connected to described
The first end of second inductance of LCL circuits；
Second end of first inductance connects the first electric capacity of the LCL circuits and the direct current of the H-bridge circuit respectively
The first port at end；
Second end of second inductance connects the first electric capacity of the LCL circuits and the direct current of the H-bridge circuit respectively
The second port at end；
The exchange end of the H-bridge circuit is used to connect first power network.
According to another aspect of the present invention, there is provided a kind of energy-storage system, including the first power network, some energy stores are set
It is standby, the energy accumulation current converter described in any one as described above.
Alternatively, the system also includes：
Some heat dissipation equipments, the 3rd switch, the second transformer, the 4th switch, the 3rd transformer；Wherein, each radiating is set
Back-up does not correspond to one or more of energy accumulation current converter power conversion unit；
For the heat dissipation equipment to supply power with double circuit, the first via connects the pair of second transformer by the described 3rd switch
Side, the primary side of second transformer are used to connect second power network mutually independent with first power network；Second tunnel passes through institute
The secondary that the 4th switch connects the 3rd transformer is stated, the primary side of the 3rd transformer is connected in the energy accumulation current converter
Exchange end.
Alternatively, the system also includes：Grid-connected switch；
Connected between the energy accumulation current converter and first power network by grid-connected switch.
Alternatively, the system also includes：
Master controller, the respectively control terminal with the grid-connected switch, each power conversion list of the energy accumulation current converter
The control terminal of control module, the 3rd switch in member connects with the control terminal of the 4th switch；
Main power supply module, for for secondary circuit and master controller power supply, comprising at least described the in the secondary circuit
Three switches and the 4th switch.
Alternatively, the main power supply module includes：
4th transformer, its primary side are used for the first power network and the second power network for connecting parallel connection, and its secondary connects one online
The first end of formula uninterrupted power source；Second end of the on-Line UPS is used to connect the master controller and described two
Minor loop.
From the foregoing, technical scheme, power supply is correspondingly arranged for each power conversion unit of energy accumulation current converter
Unit, and use and the direct current supply submodule that can be connected with energy storage device and the Alternating Current Power Supply that can be connected with AC network
Control module of the submodule to power conversion unit is powered, and wherein the voltage of direct current output is less than the voltage of exchange output,
And in DC output end positive pole one diode of series connection.The energy accumulation current converter realized by the technical scheme, it can be handed in access
It is the power supply of each power conversion unit by AC network after flowing power network and energy storage device, can be with when AC network failure
Seamlessly switch to and be powered by energy storage device, realize alternating current-direct current mixing time sharing power supply, ensure that energy accumulation current converter
Stable operation, and each power conversion unit is independently-powered, when any one power conversion unit failure by itself and it is corresponding
Power supply unit is cut off, and does not influence the normal operation of other power conversion units.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, it is various other the advantages of and benefit it is common for this area
Technical staff will be clear understanding.Accompanying drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And in whole accompanying drawing, identical part is denoted by the same reference numerals.In the accompanying drawings：
Fig. 1 shows a kind of structural representation of energy accumulation current converter according to an embodiment of the invention；
Fig. 2 shows energy accumulation current converter internal circuit topological diagram according to an embodiment of the invention；
Fig. 3 shows a kind of structural representation of energy-storage system according to an embodiment of the invention；
Fig. 4 shows a kind of structural representation of energy-storage system in accordance with another embodiment of the present invention；
Fig. 5 shows heat dissipation equipment power supply circuit schematic diagram according to an embodiment of the invention；
Fig. 6 shows main power supply module circuit theory diagrams according to an embodiment of the invention.
Embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although the disclosure is shown in accompanying drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
Limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
Completely it is communicated to those skilled in the art.
Fig. 1 shows a kind of structural representation of energy accumulation current converter according to an embodiment of the invention.As shown in figure 1,
Energy accumulation current converter 100 includes：
Several power conversion units 110, and power supply unit 120 corresponding with each power conversion unit 110 difference.Work(
Rate converter unit 110 includes control module 111, and the exchange end of power conversion unit 110 is used to connect the first power network, power conversion
The DC terminal of unit 110 is used to connect an energy storage device；Control module 110 is used to connect energy storage device；Power supply
Unit 120 includes：Direct current supply submodule 121, the first diode 122, Alternating Current Power Supply submodule 123；Direct current supply submodule
121 input is used to connect energy storage device, after output end is connected with the first diode 122, with Alternating Current Power Supply submodule
123 output end is connected in parallel the control module 111 of power conversion unit 110；The input of Alternating Current Power Supply submodule 123 is used for
Connect the first power network；The control module 111 that direct current supply submodule 121 is used for power conversion unit 110 exports first voltage,
The control module 111 that Alternating Current Power Supply submodule 123 is used for power conversion unit 110 exports second voltage；Wherein, first voltage
Less than second voltage.
Wherein, energy storage device can be energy-storage battery group, can be specifically lithium battery, lead-acid battery, lead carbon battery
Deng electrochemical secondary cell.The battery variety of each power conversion unit connection can be different, you can be any electricity of the above
Pond or two kinds or more battery it is mixed.But if what a power conversion unit connected is an energy-storage battery group,
Battery variety in the energy-storage battery group should be identical.Control module 111 can include cell controller, battery management
System and signal sampling modular converter, for controlling the operation of power conversion unit and management to energy-storage battery group.
First power network can be three-phase alternating current power network, and its voltage class can be three-phase 6KV, 10KV or even 35KV, and it can
So that electric energy can also be drawn from energy storage device to energy storage device power supply, once the first electric network power-fail, energy storage unsteady flow
Device 100 need to be operated in off-network pattern.In one case, direct current supply submodule 121 can export 220V voltage, and exchange supplies
Electronic module 123 can export 300V or so voltage, during nominal situation, because the cathode voltage of the first diode 122 is less than
Cathode voltage, therefore now direct current supply submodule not output voltage, supplied by Alternating Current Power Supply submodule for control module 111
Electricity.When the first electric network power-fail, the first diode 122 is turned on, and direct current supply has been seamlessly switched to by Alternating Current Power Supply submodule 123
Submodule 121 is powered；Alternating Current Power Supply has been seamlessly switched to when the first power system restoration, and by direct current supply submodule 121
Submodule 123 is powered.It should be noted that first voltage and second voltage should be in the nominal situation scopes of control module
It is interior so that control module can not be damaged by voltage breakdown.
It can be seen that the energy accumulation current converter shown in Fig. 1, power supply list is correspondingly arranged for each power conversion unit of energy accumulation current converter
Member, and using sub with the direct current supply submodule that can be connected with energy storage device and the Alternating Current Power Supply that can be connected with AC network
Control module of the module to power conversion unit is powered, and wherein the voltage of direct current output is less than the voltage of exchange output, and
In DC output end positive pole one diode of series connection.The energy accumulation current converter realized by the technical scheme, can be in incoming transport
After power network and energy storage device, powered by AC network for each power conversion unit, when AC network failure, Ke Yiwu
Seaming and cutting are changed to be powered by energy storage device, is realized alternating current-direct current mixing time sharing power supply, be ensure that the steady of energy accumulation current converter
Fixed operation, and each power conversion unit is independently-powered, when any one power conversion unit failure by itself and corresponding confession
Electric unit is cut off, and does not influence the normal operation of other power conversion units.
In one embodiment of the invention, in above-mentioned energy accumulation current converter, direct current supply submodule 121 includes：First is molten
Disconnected device 124, DC/DC modules 125, second fuse 126；The first end of first fuse 124 is used for and energy storage device
Positive pole is connected, and the second end is connected with the positive pole of the input of DC/DC modules 125；The first end of second fuse 126 is used for and energy
The negative pole connection of storage device, the second end is connected with the negative pole of the input of DC/DC modules 125；The output end of DC/DC modules 125
Positive pole connects the control module 111 of power conversion unit 110 by the first diode 122, and the output end of DC/DC modules 125 is born
Pole is directly connected to the control module 111 of power conversion unit 110.
The annexation of above-mentioned each device is referred to Fig. 2.Fig. 2 shows that energy storage according to an embodiment of the invention becomes
Flow device internal circuit topological diagram.So that energy storage device voltage range is 550V~850V energy-storage battery group as an example, fuse
124 and fuse 126 be connected in the positive and negative two-stage of the energy-storage battery group, play protection circuit effect, prevent overcurrent
Damage energy-storage battery group and other devices, another input for terminating to DC/DC modules 125 of two fuses, the DC/DC moulds
Block 125 can be a wide input voltage range (such as 550V~850V in this example) DC-isolation converting power source.Its work
Previous embodiment is referred to as flow, will not be repeated here.
In one embodiment of the invention, in above-mentioned energy accumulation current converter, Alternating Current Power Supply submodule 123 includes the first transformation
Device 127 and rectification module 128, the primary side of the first transformer 127 are used to connect the first power network, the friendship of secondary and rectification module 128
End connection is flowed, the DC terminal of rectification module 128 is connected with the control module 111 of power conversion unit 110.Under a kind of operating mode,
10KV High Level AC Voltage can be down to 220V low-voltage AC by the first transformer 127, then by rectification module 128 that its is whole
The direct current for 300V or so is flowed, the voltage that rectification module 128 exports there may be certain fluctuation.
In one embodiment of the invention, above-mentioned energy accumulation current converter also includes：Grid-connected reactor 130；Several power
Converter unit 110 is cascaded into some power conversion links；Grid-connected reactor 130 includes some branch roads, and the first of each branch road
End is respectively used to connect the port of first one phase of power network, and the second end of each branch road connects a power conversion link respectively.
When the first power network is three phase network, grid-connected reactor includes three branch roads, and correspondingly, power conversion link also has
Three, each power conversion link one end is connected with a branch road of grid-connected reactor, and the other end can form Y-connection or three
Angle connection.In the present embodiment, it is contemplated that each power conversion unit uses Cascade Topology Structure, and equivalent switching frequency is very high, defeated
Go out that the harmonic content of voltage x current is less, therefore do not need traditional LCL filter, but select grid-connected reactor.Fig. 3 is shown
In this case the structural representation of energy-storage system, each energy storage device select energy-storage battery group, three power conversions
Link Y-connection, every power conversion link n power conversion unit of cascade, n is positive integer.
In one embodiment of the invention, in above-mentioned energy accumulation current converter, power conversion unit 110 also includes first switch
112nd, second switch 113, current-limiting resistance 114, H-bridge circuit 115 and LCL circuits 116；The first end of first switch 112 is used to connect
The positive pole of energy storage device is connect, the second end connects the first of the first inductance 117 of LCL circuits 116 by current-limiting resistance 114
End；The first end of second switch 113 is used to connecting the positive pole of energy storage device, and the second end is directly connected to the of LCL circuits 116
The first end of two inductance 118；Second end of the first inductance 117 connects the first electric capacity 119 and H-bridge circuit of LCL circuits 116 respectively
The first port of 115 DC terminal；Second end of the second inductance 118 connects the first electric capacity 119 and H bridges of LCL circuits 116 respectively
The second port of the DC terminal of circuit 115；The exchange end of H-bridge circuit 115 is used to connect the first power network.
In the present embodiment, the power device in H-bridge circuit 115 can select insulated gate bipolar transistor IGBT, collection
One or more into door pole stream-exchanging thyristor IGCT and electron injection enhancement gate transistor IEGT.First electric capacity 119 plays
Filtering and the effect of voltage support, the first inductance 117 and the second inductance 118 coordinate with the first electric capacity 119, can be to DC current
It is filtered, reduces the content of high-frequency harmonic and 2 frequency multiplication electric currents.After the first power network and energy storage device is linked into, first
First switch 112 is closed, disconnects second switch 113, is that the power device in H-bridge circuit 115 enters line precharge；Precharge is completed
Afterwards, first switch 112 is disconnected, closure second switch 113 carries out normal work.Wherein first switch 112 and second switch 113 can
From contactor.
Fig. 4 shows a kind of structural representation of energy-storage system in accordance with another embodiment of the present invention, as shown in figure 4,
Energy-storage system 400 includes the first power network 410, some energy storage devices 420, such as the energy storage unsteady flow in above-mentioned any embodiment
Device 100.Wherein, energy storage device 420 can be energy-storage battery group, can be specifically lithium battery, lead-acid battery, lead carbon battery
Deng electrochemical secondary cell.The battery variety of each power conversion unit connection can be different, you can be any electricity of the above
Pond or two kinds or more battery it is mixed.But if what a power conversion unit connected is an energy-storage battery group,
Battery variety in the energy-storage battery group should be identical.First power network 410 can be three-phase alternating current power network, its voltage etc.
Level can be three-phase 6KV, 10KV or even 35KV, and it can give the power supply of energy storage device 420 can also be from energy storage device
Electric energy is drawn in 420, once the power down of the first power network 410, energy accumulation current converter 100 need to be operated in off-network pattern.
Some heat dissipation equipments 430, the 3rd the 440, second transformer the 450, the 4th of switch switch the 460, the 3rd transformer
470；Wherein, each heat dissipation equipment 430 corresponds to one or more of energy accumulation current converter 100 power conversion unit 110 respectively；Radiating
For equipment 430 to supply power with double circuit, the first via passes through the secondary of the second transformer 450 of connection of the 3rd switch 440, the second transformer 450
Primary side be used for connect one and the phase independence of the first power network 410 the second power network；Second tunnel is become by the connection the 3rd of the 4th switch 460
The secondary of depressor 470, the exchange end of the primary side connection energy accumulation current converter 100 of the 3rd transformer 470.Wherein, heat dissipation equipment can be with
It is Fan Equipment, supports 220V Alternating Current Power Supplies；3rd switch 440 and the 4th switch can select relay, and switching logic is phase
Mutual correlation, wherein, the 3rd switch 440 can be normally closed, and the 4th switch 460 is normally opened.So under normal circumstances by
Two power networks are powered for heat dissipation equipment, if the second grid collapses, then then disconnect the 3rd switch 440, closure the 4th
Switch 460, is powered by the first power network 410 in energy-storage system 400.
In one embodiment of the invention, said system also includes：Grid-connected switch 480；Energy accumulation current converter 100 and first
Pass through the grid-connected connection of switch 480 between power network 410.
In the above embodiments, if the first power network 410 breaks down, then disconnect grid-connected switch 480 so that energy storage
Current transformer is operated in off-network pattern.At this moment if the 3rd switch 440 disconnects, the closure of the 4th switch 460, heat dissipation equipment 430 is by energy
Amount storage device 420 is powered.So cause heat dissipation equipment 430 to there is multiple power supply to ensure, and do not waste energy stores
The electric energy of equipment 420 (electric energy in energy storage device is valuable, and relative cost is higher).Its circuit theory diagrams is as shown in Figure 5.
In one embodiment of the invention, said system also includes：Master controller 490, respectively with grid-connected switch 480
Control terminal, energy accumulation current converter 100 each power conversion unit 110 in control module the 111, the 3rd switch 440 control terminal and
The control terminal connection of 4th switch 460；Main power supply module 4010, for being powered for secondary circuit and master controller 490, secondary returning
The 3rd switch 440 and the 4th switch 460 are comprised at least in road.In secondary circuit can also including light circuit etc. other conventional electricity
Road.Master controller 490 can send advanced control instruction, realize peak-frequency regulation, emergency service, back-up source, smooth power or
Person's load curve, and improve quality of power supply etc., and energy accumulation current converter 100 is worked in grid-connected charging, grid-connected electric discharge, active
Input and output, idle input and output, off-network charging and off-network electric discharge isotype.
In one embodiment of the invention, in said system, main power supply module 4010 includes：The He of 4th transformer 4011
On-Line UPS 4012, the primary side of the 4th transformer 4011 is used for the first power network 410 and the second power network for connecting parallel connection, secondary
Side connects the first end of an on-Line UPS 4012；Second end of on-Line UPS 4012 is used to connect master
Controller 490 and secondary circuit.Its circuit theory diagrams is as shown in Figure 6.
The advantages of this power supply mode that the present embodiment uses, mainly has：First, on-Line UPS (On- is passed through
Line Uninterrupted Power Supply) 4012 the higher voltage of quality is obtained, avoid voltage ripple of power network and make
Into interference；2nd, double power network power supplies add on-Line UPS, triple guarantees, ensure that master controller 490 and secondary returning
The power supply continuity on road.
In summary, this have the advantage that, it is proposed that it is a kind of for each power conversion unit it is independently-powered
Energy accumulation current converter, with reference to the Cascade Topology Structure design feature of energy accumulation current converter, each power conversion unit is correspondingly arranged power supply unit,
And use and the direct current supply submodule that can be connected with energy storage device and the Alternating Current Power Supply submodule that can be connected with AC network
Control module of the block to power conversion unit is powered, wherein the voltage of direct current output be less than exchange output voltage, and
DC output end positive pole one diode of series connection.The energy accumulation current converter realized by the technical scheme, can be in incoming transport electricity
After net and energy storage device, powered by AC network for each power conversion unit, can be with seamless when AC network failure
It is switched to and is powered by energy storage device, realizes alternating current-direct current mixing time sharing power supply, ensure that the stabilization of energy accumulation current converter
Operation, and each power conversion unit is independently-powered, when any one power conversion unit failure by itself and corresponding power supply
Unit is cut off, and does not influence the normal operation of other power conversion units.
Then it is respectively from power conversion unit, blower fan and master controller and secondary circuit for whole energy-storage system
Three aspects are started with, it is corresponding devise alternating current-direct current mixing time sharing power supply, dual power supply is ensured and powered and between double power networks are added in wire type not
The Multiple Optimization power supply plan in power-off source, and based on being powered with power network, it is major-minor supplemented by the energy storage storage device power supply of energy-storage system
With reference to, complement one another, so as to ensure that the overall control power supply power supply of energy-storage system is reliable continuous, ensured energy accumulation current converter without
By the equal energy normal work under which kind of mode of operation.Improve the global reliability and economy of energy-storage system.
The foregoing is only a specific embodiment of the invention, under the above-mentioned teaching of the present invention, those skilled in the art
Other improvement or deformation can be carried out on the basis of above-described embodiment.It will be understood by those skilled in the art that above-mentioned tool
The purpose of the present invention is simply preferably explained in body description, and protection scope of the present invention should be defined by scope of the claims.
Claims (10)
1. a kind of energy accumulation current converter, it is characterised in that the energy accumulation current converter includes：
Several power conversion units, and power supply unit corresponding with each power conversion unit difference；
The power conversion unit includes control module, and the exchange end of the power conversion unit is used to connect the first power network, institute
The DC terminal for stating power conversion unit is used to connect an energy storage device；The control module is deposited for connecting the energy
Store up equipment；The control module include it is following in one or more：Cell controller, battery management system, signal sampling turn
Change the mold block；
Said supply unit includes：Direct current supply submodule, the first diode, Alternating Current Power Supply submodule；
The input of the direct current supply submodule is used to connect the energy storage device, output end and first diode
After series connection, the control module of the power conversion unit is connected in parallel with the output end of the Alternating Current Power Supply submodule；
The input of the Alternating Current Power Supply submodule is used to connect first power network；
The direct current supply submodule is used for the control module output first voltage to the power conversion unit, and the exchange supplies
Electronic module is used for the control module output second voltage to the power conversion unit；Wherein, the first voltage is less than institute
State second voltage.
2. energy accumulation current converter as claimed in claim 1, it is characterised in that the direct current supply submodule includes：First fusing
Device, DC/DC modules, second fuse；
The first end of the first fuse is used to be connected with the positive pole of the energy storage device, the second end and the DC/DC
The positive pole connection of module input；
The first end of the second fuse is used to be connected with the negative pole of the energy storage device, the second end and the DC/DC
The negative pole connection of module input；
The positive pole of the DC/DC modules output end connects the control mould of the power conversion unit by first diode
Group, the negative pole of the DC/DC modules output end are directly connected to the control module of the power conversion unit.
3. energy accumulation current converter as claimed in claim 1, it is characterised in that the Alternating Current Power Supply submodule includes the first transformer
And rectification module, the primary side of first transformer are used to connect first power network, secondary exchanges with the rectification module
End connection, the DC terminal of the rectification module are connected with the control module of the power conversion unit.
4. energy accumulation current converter as claimed in claim 1, it is characterised in that the energy accumulation current converter also includes：Grid-connected reactor；
Several described power conversion units are cascaded into some power conversion links；
The grid-connected reactor includes some branch roads, and the first end of each branch road is respectively used to connect one phase of the first power network
Port, the second end of each branch road connect a power conversion link respectively.
5. energy accumulation current converter as claimed in claim 1, it is characterised in that
The power conversion unit also includes first switch, second switch, current-limiting resistance, H-bridge circuit and LCL circuits；
The first end of the first switch is used for the positive pole for connecting the energy storage device, and the second end passes through the current-limiting resistance
Connect the first end of the first inductance of the LCL circuits；
The first end of the second switch is used for the positive pole for connecting the energy storage device, and the second end is directly connected to the LCL
The first end of second inductance of circuit；
Second end of first inductance connects the first electric capacity of the LCL circuits and the DC terminal of the H-bridge circuit respectively
First port；
Second end of second inductance connects the first electric capacity of the LCL circuits and the DC terminal of the H-bridge circuit respectively
Second port；
The exchange end of the H-bridge circuit is used to connect first power network.
6. a kind of energy-storage system, it is characterised in that the energy-storage system includes the first power network, some energy storage devices, such as weighs
Profit requires the energy accumulation current converter any one of 1-5.
7. system as claimed in claim 6, it is characterised in that the system also includes：
Some heat dissipation equipments, the 3rd switch, the second transformer, the 4th switch, the 3rd transformer；Wherein, each heat dissipation equipment point
One or more of energy accumulation current converter power conversion unit is not corresponded to；
For the heat dissipation equipment to supply power with double circuit, the first via connects the secondary of second transformer, institute by the described 3rd switch
The primary side for stating the second transformer is used to connect second power network mutually independent with first power network；Second tunnel passes through the described 4th
Switch connects the secondary of the 3rd transformer, and the primary side of the 3rd transformer connects the exchange in the energy accumulation current converter
End.
8. system as claimed in claim 7, it is characterised in that the system also includes：Grid-connected switch；
Connected between the energy accumulation current converter and first power network by grid-connected switch.
9. system as claimed in claim 8, it is characterised in that the system also includes：
Master controller, respectively the control terminal with the grid-connected switch, the energy accumulation current converter each power conversion unit in
Control module, the 3rd switch control terminal with the 4th switch control terminal connect；
Main power supply module, for being powered for secondary circuit and master controller, opened in the secondary circuit including at least the described 3rd
Close and the 4th switchs.
10. system as claimed in claim 9, it is characterised in that the main power supply module includes：
4th transformer, its primary side are used for the first power network and the second power network for connecting parallel connection, and its secondary connection one is online not
The first end of uninterruptible power；Second end of the on-Line UPS is used to connect the master controller and the secondary returning
Road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710812862.8A CN107612408B (en) | 2017-09-11 | 2017-09-11 | Energy storage converter and energy storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710812862.8A CN107612408B (en) | 2017-09-11 | 2017-09-11 | Energy storage converter and energy storage system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107612408A true CN107612408A (en) | 2018-01-19 |
| CN107612408B CN107612408B (en) | 2020-05-05 |
Family
ID=61062130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710812862.8A Active CN107612408B (en) | 2017-09-11 | 2017-09-11 | Energy storage converter and energy storage system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107612408B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188156A (en) * | 2018-11-06 | 2019-01-11 | 威凡智能电气高科技有限公司 | A kind of high pressure direct screening energy accumulation current converter modular testing platform and test circuit |
| CN109245285A (en) * | 2018-10-25 | 2019-01-18 | 南方电网科学研究院有限责任公司 | A kind of redundant topology structure of delta network |
| CN109831022A (en) * | 2019-03-21 | 2019-05-31 | 上海采日能源科技有限公司 | Electric power management circuit and power supply system |
| CN110201330A (en) * | 2019-06-03 | 2019-09-06 | 威凡智能电气高科技有限公司 | A kind of water fire fighting system and its control method for high pressure direct screening battery energy storage |
| CN110350648A (en) * | 2019-06-27 | 2019-10-18 | 芜湖康爱而电气有限公司 | Dual power supply uninterruptible power system suitable for energy accumulation current converter |
| CN113300429A (en) * | 2021-05-17 | 2021-08-24 | 同济大学 | New and old and different model hybrid system of lithium cell for energy storage |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000014043A (en) * | 1998-06-05 | 2000-01-14 | Internatl Business Mach Corp <Ibm> | Uninterruptive power supply |
| CN201656756U (en) * | 2010-05-14 | 2010-11-24 | 浪潮电子信息产业股份有限公司 | AC/DC server power |
| CN202798125U (en) * | 2012-09-07 | 2013-03-13 | 西安许继电力电子技术有限公司 | Redundant power supply system of photovoltaic grid-connected inverter control device |
| WO2014199628A1 (en) * | 2013-06-14 | 2014-12-18 | 株式会社 東芝 | Battery energy storage system |
| CN104333042A (en) * | 2014-11-17 | 2015-02-04 | 国网上海市电力公司 | Energy storage current transformer grid connection and grid disconnection seamless switching device and method |
| CN207368676U (en) * | 2017-09-11 | 2018-05-15 | 广州智光电气股份有限公司 | A kind of energy accumulation current converter and energy-storage system |
-
2017
- 2017-09-11 CN CN201710812862.8A patent/CN107612408B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000014043A (en) * | 1998-06-05 | 2000-01-14 | Internatl Business Mach Corp <Ibm> | Uninterruptive power supply |
| CN201656756U (en) * | 2010-05-14 | 2010-11-24 | 浪潮电子信息产业股份有限公司 | AC/DC server power |
| CN202798125U (en) * | 2012-09-07 | 2013-03-13 | 西安许继电力电子技术有限公司 | Redundant power supply system of photovoltaic grid-connected inverter control device |
| WO2014199628A1 (en) * | 2013-06-14 | 2014-12-18 | 株式会社 東芝 | Battery energy storage system |
| CN104333042A (en) * | 2014-11-17 | 2015-02-04 | 国网上海市电力公司 | Energy storage current transformer grid connection and grid disconnection seamless switching device and method |
| CN207368676U (en) * | 2017-09-11 | 2018-05-15 | 广州智光电气股份有限公司 | A kind of energy accumulation current converter and energy-storage system |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109245285A (en) * | 2018-10-25 | 2019-01-18 | 南方电网科学研究院有限责任公司 | A kind of redundant topology structure of delta network |
| CN109245285B (en) * | 2018-10-25 | 2023-09-05 | 南方电网科学研究院有限责任公司 | Redundant topological structure of triangle circuit |
| CN109188156A (en) * | 2018-11-06 | 2019-01-11 | 威凡智能电气高科技有限公司 | A kind of high pressure direct screening energy accumulation current converter modular testing platform and test circuit |
| CN109831022A (en) * | 2019-03-21 | 2019-05-31 | 上海采日能源科技有限公司 | Electric power management circuit and power supply system |
| CN110201330A (en) * | 2019-06-03 | 2019-09-06 | 威凡智能电气高科技有限公司 | A kind of water fire fighting system and its control method for high pressure direct screening battery energy storage |
| CN110350648A (en) * | 2019-06-27 | 2019-10-18 | 芜湖康爱而电气有限公司 | Dual power supply uninterruptible power system suitable for energy accumulation current converter |
| CN113300429A (en) * | 2021-05-17 | 2021-08-24 | 同济大学 | New and old and different model hybrid system of lithium cell for energy storage |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107612408B (en) | 2020-05-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107612408A (en) | A kind of energy accumulation current converter and energy-storage system | |
| Shi et al. | Isolated modular multilevel DC–DC converter with DC fault current control capability based on current-fed dual active bridge for MVDC application | |
| US10523131B2 (en) | Reconfigurable MMC sub-module unit and control unit thereof | |
| CN104702114B (en) | The High Frequency Link bidirectional, dc transformer and its control method of a kind of switching capacity access | |
| CN102983577A (en) | Convertible static compensator provided with modular multilevel converter structure | |
| CN105743352A (en) | Improved switched capacitor-accessed two-way DC transformer and control method thereof | |
| US11967859B2 (en) | Power factor correction circuit, power factor correction assembly and on-line uninterruptible power supply comprising same | |
| CN103715754A (en) | UPS and power supply system | |
| CN109193747A (en) | Bipolar flexible DC grid neutral conductor change-over switch configures system and conversion method | |
| Purgat et al. | Low-voltage dc system building blocks: Integrated power flow control and short circuit protection | |
| Zhao et al. | Summary and prospect of technology development of MVDC and LVDC distribution technology | |
| CN215343934U (en) | AC/DC comprehensive energy power distribution network system based on flexible DC wind-solar energy storage | |
| CN106972541A (en) | A kind of power distribution network multiterminal flexible interconnection switch based on mixed type submodule MMC | |
| EP3157120B1 (en) | Modular multi-level flexible direct-current topology circuit suitable for fault ride-through | |
| CN207368676U (en) | A kind of energy accumulation current converter and energy-storage system | |
| CN112865046A (en) | Multifunctional multiport hybrid direct current breaker and control method | |
| CN202949227U (en) | Convertible static compensator employing modularization multi-level converter structure | |
| CN206226093U (en) | Online double conversion ups systems | |
| CN113839370A (en) | Voltage regulation and control type oscillation type direct current breaker and control method thereof | |
| CN113726162A (en) | Series network type transformer based on voltage reduction type public direct current bus | |
| CN106655081A (en) | Direct current circuit breaker and control method therefor | |
| CN203387196U (en) | Topological structure used for ultra-high voltage ultra-large capacity flexible direct current transmission system | |
| CN207603211U (en) | A kind of three end DC transmission systems | |
| CN207490512U (en) | A kind of three end DC transmission systems | |
| CN215897281U (en) | Voltage regulation and control type oscillation type direct current breaker |
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 | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180312 Address after: 510760 Po Nan Road, Whampoa District, Guangzhou, Guangdong Province, No. 51 Applicant after: Guangzhou Zhiguang Electric Co., Ltd. Applicant after: Guangzhou Chi Guang Energy Storage Technology Co., Ltd. Address before: 510760 Po Nan Road, Whampoa District, Guangzhou, Guangdong Province, No. 51 Applicant before: Guangzhou Zhiguang Electric Co., Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |