CN109193722A - In conjunction with the hybrid middle pressure AC network energy storage device of battery and super capacitor - Google Patents
In conjunction with the hybrid middle pressure AC network energy storage device of battery and super capacitor Download PDFInfo
- Publication number
- CN109193722A CN109193722A CN201811169365.1A CN201811169365A CN109193722A CN 109193722 A CN109193722 A CN 109193722A CN 201811169365 A CN201811169365 A CN 201811169365A CN 109193722 A CN109193722 A CN 109193722A
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- Prior art keywords
- energy storage
- battery
- bridge
- battery energy
- phase
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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
- H02J3/28—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
-
- 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
- H02J15/00—Systems for storing electric energy
-
- 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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
-
- 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
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
Abstract
The invention discloses the hybrid middle pressure AC network energy storage devices of a kind of combination battery and super capacitor, comprising: #1 battery energy storage system, #2 battery energy storage system, two set of three reactance that is connected, one group of supercapacitor group；Wherein, the neutral point of #1 battery energy storage system is connected with the anode of supercapacitor group, the neutral point of #2 battery energy storage system is connected with the cathode of supercapacitor group, and the exchange output of #1 battery energy storage system, #2 battery energy storage system is connected in three-phase by corresponding three-phase linked reactor respectively presses on ac bus.The present invention does not need step-up transformer and is directly connected on middle pressure ac bus, and it is big that energy storage technology list covers capacity, can either high-power charge and discharge, and the charge and discharge of relatively high power long period may be implemented.
Description
Technical field
The present invention relates to the hybrid middle pressure AC network energy storage devices of a kind of combination battery and super capacitor.
Background technique
Energy storage technology is that one of important link and critical support technology of smart grid and generation of electricity by new energy connect at high proportion
Enter the indispensable technology of power grid.
With the extensive access power grid of popularization and application and the generation of electricity by new energy of smart grid, the important work of energy storage technology
With increasingly apparent, application range be related to hair, it is defeated, become, match, using links.Energy storage technology type multiplicity, capacity, power,
The technical characteristics such as response time and related economic characteristic are had nothing in common with each other.Energy storage technology type mainly has: water-storage, compressed air
Energy storage, all kinds of battery energy storages, super conductive magnetic storage energy, flywheel energy storage, ultracapacitor energy storage etc..Wherein water-storage is big at present electric
The most mature energy storage technology of net, using alreading exceed 100 years, but there are geographical location limitation and cycle efficienies (75% or so)
Not high enough problem.It lithium battery energy storage battery energy density with higher, higher cycle efficieny and is not limited substantially by geographical location
The advantages of processed, but the shortcomings that there is also low power densities.And ultracapacitor energy storage has very high power density, it can big function
Rate charge and discharge, and the response time is fast, suitable for coping with voltage dip and instantaneous power-off, the power quality for improving user, inhibits electricity
Force system low-frequency oscillation and raising stability of power system etc..But but there is lower energy density and ask in ultracapacitor energy storage
Topic.Therefore scholar proposes to combine lithium battery and supercapacitor into the energy storage technology for being applied to AC network, and
And also has a few demonstration case engineering.
Currently, battery and super capacitor hybrid energy-storing technology have following two: 1) ac output voltage is low, generally
For 400V；2) single-machine capacity is small, general 500kW or so.
Summary of the invention
The present invention is directed to make up deficiency in the prior art, propose a kind of combination battery and super capacitor it is hybrid in
Press AC network energy storage device.
A kind of hybrid middle pressure AC network energy storage device of combination battery and super capacitor, comprising: #1 battery energy storage
System, #2 battery energy storage system, two set of three reactance that is connected, one group of supercapacitor group；Wherein, in #1 battery energy storage system
Property point is connected with the anode of supercapacitor group, and the neutral point of #2 battery energy storage system is connected with the cathode of supercapacitor group
It connects, the exchange output of #1 battery energy storage system, #2 battery energy storage system is connected to by corresponding three-phase linked reactor respectively
It is pressed on ac bus in three-phase.
The #1 battery energy storage system, its three-phase circuit is identical, and every phase is by several battery energy storage submodules
Block cascade is constituted, three-phase star-like connection, and neutral point connects the anode of supercapacitor group, and exchange side three-phase is respectively with corresponding three
Be connected reactor one end connection, the other end of three-phase linked reactor be connected in three-phase press ac bus on, it is described
Battery energy storage submodule a part is full-bridge battery energy storage submodule, and another part is half-bridge battery energy storage submodule.
The #2 battery energy storage system, its three-phase circuit is identical, and every phase is by several battery energy storage submodules
Block cascade is constituted, three-phase star-like connection, and neutral point connects the cathode of supercapacitor group, and exchange side three-phase is respectively with corresponding three
Be connected reactor one end connection, the other end of three-phase linked reactor be connected in three-phase press ac bus on, it is described
Battery energy storage submodule a part is full-bridge battery energy storage submodule, and another part is half-bridge battery energy storage submodule.
The full-bridge battery energy storage submodule, including a battery pack and a full-bridge DC/AC current transformer, battery pack and
The DC bus capacitor of full-bridge DC/AC current transformer is in parallel；Or including a battery pack, a two-way DC/DC current transformer and one
Full-bridge DC/AC current transformer, one end of two-way DC/DC current transformer and battery pack are in parallel, the other end and with full-bridge DC/AC current transformer
DC bus capacitor is in parallel.
The half-bridge battery energy storage submodule, including a battery pack and a half-bridge DC/AC current transformer, battery pack and
The DC bus capacitor of half-bridge DC/AC current transformer is in parallel；Or including a battery pack, a two-way DC/DC current transformer and one
Half-bridge DC/AC current transformer, one end of two-way DC/DC current transformer and battery pack are in parallel, the other end and with half-bridge DC/AC current transformer
DC bus capacitor is in parallel.
The beneficial effects of the present invention are: 1) proposed by the present invention energy storage technology can not need step-up transformer directly connect
It is connected on pressure ac bus；2) energy storage technology list set capacity proposed by the present invention is big；3) due to using battery and super
Capacitor, energy storage technology proposed by the present invention can either high-power charge and discharge, and the charge and discharge of relatively high power long period may be implemented.
Therefore power grid peak load, the primary frequency modulation for participating in power grid can be effectively adjusted, inhibits power grid oscillation, improve grid stability.
Detailed description of the invention
Fig. 1 is electrical block diagram of the invention；
Fig. 2 is the electrical block diagram of full-bridge battery energy storage submodule；
Fig. 3 is the full-bridge battery energy storage submodule with two-way DC/DC current transformer；
Fig. 4 is the electrical block diagram of half-bridge battery energy storage submodule；
Fig. 5 is the half-bridge battery energy storage submodule with two-way DC/DC current transformer.
Pressed in figure, in three-phase ac bus 1, #1 battery energy storage system 2, #2 battery energy storage system 3, three be connected reactance 4,
Supercapacitor group 5.
Specific embodiment
Below in conjunction with Figure of description, the invention will be further described.
As shown in Figure 1, the hybrid middle pressure AC network energy storage device of a kind of combination battery and super capacitor, comprising:
#1 battery energy storage system 2,3, two set three of #2 battery energy storage system 4, the one groups of supercapacitor groups 5 of reactance that are connected；Wherein, #1 electricity
The neutral point of pond energy-storage system 2 is connected with the anode of supercapacitor group 5, the neutral point of #2 battery energy storage system 3 and super
The cathode of capacitor group 5 is connected, and the exchange output of #1 battery energy storage system 2, #2 battery energy storage system 3 is respectively by corresponding
Three-phase linked reactor 4 is connected in three-phase and presses on ac bus 1.
The #1 battery energy storage system 2, its three-phase circuit is identical, and every phase is by several battery energy storage submodules
Block cascade constitute, three-phase star-like connection, neutral point connect supercapacitor group 5 anode, exchange side three-phase respectively with it is corresponding
One end of three-phase linked reactor 4 connects, and the other end of three-phase linked reactor 4 is connected in three-phase and presses on ac bus 1, institute
The battery energy storage submodule a part stated is full-bridge battery energy storage submodule, and another part is half-bridge battery energy storage submodule.
The #2 battery energy storage system 3, its three-phase circuit is identical, and every phase is by several battery energy storage submodules
Block cascade constitute, three-phase star-like connection, neutral point connect supercapacitor group 5 cathode, exchange side three-phase respectively with it is corresponding
One end of three-phase linked reactor 4 connects, and the other end of three-phase linked reactor 4 is connected in three-phase and presses on ac bus 1, institute
The battery energy storage submodule a part stated is full-bridge battery energy storage submodule, and another part is half-bridge battery energy storage submodule.
Circuit structure, parameter and the mode of connection (star-connection) complete phase of every phase of two sets of above-mentioned battery energy storage systems
Together, (usually less than by the bridge-type battery energy storage submodule of several low pressure (usually less than 1000V) and several low pressure
Semi-bridge type battery energy storage sub-module cascade 1000V) forms.
As shown in Figure 2 and Figure 3, the full-bridge battery energy storage submodule, including a battery pack and a full-bridge DC/AC
The DC bus capacitor of current transformer, battery pack and full-bridge DC/AC current transformer is in parallel；Or including a battery pack, a two-way DC/
DC current transformer and a full-bridge DC/AC current transformer, one end of two-way DC/DC current transformer and battery pack are in parallel, the other end and and complete
The DC bus capacitor of bridge DC/AC current transformer is in parallel.
As shown in Figure 4, Figure 5, the half-bridge battery energy storage submodule, including a battery pack (usually less than 1000V)
With a half-bridge DC/AC current transformer, the DC bus capacitor of battery pack and half-bridge DC/AC current transformer is in parallel；Or including an electricity
Pond group, a two-way DC/DC current transformer and a half-bridge DC/AC current transformer, one end of two-way DC/DC current transformer and battery pack
Parallel connection, the other end and the DC bus capacitor parallel connection with half-bridge DC/AC current transformer.
Circuit structure, parameter and the mode of connection (star-connection) complete phase of every phase of two sets of battery energy storage systems
Together, (usually less than by the bridge-type battery energy storage submodule of several low pressure (usually less than 1000V) and several low pressure
Semi-bridge type battery energy storage sub-module cascade 1000V) forms.The bridge-type battery energy storage submodule is (logical by a low pressure
It is often constituted lower than 1000V) battery pack and a two-way full-bridge voltage source type DC/AC current transformer, the direct current of battery pack and current transformer
Side parallel connection (Fig. 2).The bridge-type battery energy storage submodule can also by a battery pack, a two-way DC/DC current transformer,
It is constituted with a full-bridge voltage source type DC/AC current transformer.One end of two-way DC/DC current transformer and battery pack are in parallel, the other end and
The DC bus capacitor of full-bridge DC/AC current transformer is (Fig. 3) in parallel.
The semi-bridge type battery energy storage submodule is by low pressure (usually less than 1000V) battery pack and one two-way half
Bridge voltage source type DC/AC current transformer is constituted, the DC side parallel (Fig. 4) of battery pack and current transformer.The semi-bridge type battery storage
Energy submodule can also be by a battery pack, a two-way DC/DC current transformer and a half-bridge voltage source type DC/AC current transformer
It constitutes.One end of two-way DC/DC current transformer and battery pack are in parallel, the other end and the DC bus capacitor with half-bridge DC/AC current transformer
(Fig. 5) in parallel.
Every phase full-bridge battery energy storage sub-module cascade total number and half-bridge battery energy storage sub-module cascade total number by: it is A) electric
DC voltage upper lower limit value, the B of pond energy storage submodule) load voltage value and C of ac bus are pressed in three-phase) super capacitor
The maximum voltage value of device group is determined.
Claims (5)
1. the hybrid middle pressure AC network energy storage device of a kind of combination battery and super capacitor, it is characterized in that: including: #1 electricity
Pond energy-storage system (2), #2 battery energy storage system (3), two set of three reactance that is connected (4), one group of supercapacitor group (5)；Its
In, the neutral point of #1 battery energy storage system (2) is connected with the anode of supercapacitor group (5), #2 battery energy storage system (3)
Neutral point is connected with the cathode of supercapacitor group (5), the exchange of #1 battery energy storage system (2), #2 battery energy storage system (3)
Output is connected in three-phase by corresponding three-phase linked reactor (4) presses on ac bus (1) respectively.
2. device as described in claim 1, it is characterized in that: the #1 battery energy storage system (2), its three-phase circuit are complete
Identical, every phase is made of several battery energy storage sub-module cascades, three-phase star-like connection, and neutral point connects supercapacitor group
(5) anode, exchange side three-phase are connected with one end of corresponding three-phase linked reactor (4) respectively, three-phase linked reactor (4)
The other end be connected in three-phase press ac bus (1) on, described battery energy storage submodule a part be full-bridge battery energy storage
Submodule, another part are half-bridge battery energy storage submodule.
3. device as described in claim 1, it is characterized in that: the #2 battery energy storage system (3), its three-phase circuit are complete
Identical, every phase is made of several battery energy storage sub-module cascades, three-phase star-like connection, and neutral point connects supercapacitor group
(5) cathode, exchange side three-phase are connected with one end of corresponding three-phase linked reactor (4) respectively, three-phase linked reactor (4)
The other end be connected in three-phase press ac bus (1) on, described battery energy storage submodule a part be full-bridge battery energy storage
Submodule, another part are half-bridge battery energy storage submodule.
4. device as claimed in claim 2 or claim 3, it is characterized in that: the full-bridge battery energy storage submodule, including a battery
The DC bus capacitor of group and a full-bridge DC/AC current transformer, battery pack and full-bridge DC/AC current transformer is in parallel；Or including one
Battery pack, a two-way DC/DC current transformer and a full-bridge DC/AC current transformer, one end of two-way DC/DC current transformer and battery
Group is in parallel, the other end and the DC bus capacitor parallel connection with full-bridge DC/AC current transformer.
5. device as claimed in claim 2 or claim 3, it is characterized in that: the half-bridge battery energy storage submodule, including a battery
The DC bus capacitor of group and a half-bridge DC/AC current transformer, battery pack and half-bridge DC/AC current transformer is in parallel；Or including one
Battery pack, a two-way DC/DC current transformer and a half-bridge DC/AC current transformer, one end of two-way DC/DC current transformer and battery
Group is in parallel, the other end and the DC bus capacitor parallel connection with half-bridge DC/AC current transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811169365.1A CN109193722A (en) | 2018-10-08 | 2018-10-08 | In conjunction with the hybrid middle pressure AC network energy storage device of battery and super capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811169365.1A CN109193722A (en) | 2018-10-08 | 2018-10-08 | In conjunction with the hybrid middle pressure AC network energy storage device of battery and super capacitor |
Publications (1)
| Publication Number | Publication Date |
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| CN109193722A true CN109193722A (en) | 2019-01-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201811169365.1A Pending CN109193722A (en) | 2018-10-08 | 2018-10-08 | In conjunction with the hybrid middle pressure AC network energy storage device of battery and super capacitor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110224419A (en) * | 2019-05-10 | 2019-09-10 | 国网浙江省电力有限公司绍兴供电公司 | Hybrid middle pressure energy-storage system |
| CN115021302A (en) * | 2022-08-09 | 2022-09-06 | 四川大学 | Megawatt hybrid energy storage device with electric energy quality regulation function and control method |
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| CN102185487A (en) * | 2011-05-17 | 2011-09-14 | 清华大学 | Mixed cascading type multilevel stored energy charging-discharging and voltage-equalizing circuit |
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Application publication date: 20190111 |