CN209344797U - Single-stage chain type energy storage converter and energy storage system - Google Patents
Single-stage chain type energy storage converter and energy storage system Download PDFInfo
- Publication number
- CN209344797U CN209344797U CN201821754283.9U CN201821754283U CN209344797U CN 209344797 U CN209344797 U CN 209344797U CN 201821754283 U CN201821754283 U CN 201821754283U CN 209344797 U CN209344797 U CN 209344797U
- Authority
- CN
- China
- Prior art keywords
- filter circuit
- chain type
- inverter circuit
- filter
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004146 energy storage Methods 0.000 title claims abstract description 25
- 238000009825 accumulation Methods 0.000 claims description 34
- 239000003990 capacitor Substances 0.000 claims description 17
- 238000001914 filtration Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Landscapes
- Inverter Devices (AREA)
Abstract
The utility model provides a single-stage chain energy storage converter and energy storage system, this single-stage chain energy storage converter, include: the three-phase chain type converter is connected to a three-phase grid and connected in a triangular connection mode, and each phase chain type converter comprises a plurality of sub-modules, wherein the alternating current sides of the sub-modules are sequentially connected in series; the sub-modules include: the battery module comprises an inverter circuit, a battery module, a first filter circuit and a second filter circuit; the input end of the battery module and the output end of the first filter circuit are connected with the input end of the second filter circuit, and the output end of the second filter circuit is connected with the first alternating current end of the inverter circuit; the output end of the battery module is connected with the first direct current end of the inverter circuit; the input end of the first filter circuit is connected with the second direct current end of the inverter circuit. The single-stage chained energy storage converter is simple in structure and low in cost, and meanwhile, the operation reliability and efficiency of an energy storage system can be guaranteed.
Description
Technical field
The utility model relates to electron electric power technical fields, and in particular to a kind of single-stage chain type energy accumulation current converter and energy storage system
System.
Background technique
The fluctuation and intermittence of the generations of electricity by new energy such as photovoltaic, wind-force bring huge challenge to the safe operation of power grid.Make
To promote electric system to a kind of effective measures of scale generation of electricity by new energy digestion capability, battery energy storage technology is always to study
Hot spot.With the permeability of new energy and stepping up for load power demands, the function of the battery energy storage system of power grid is accessed
Rate also will be higher and higher with voltage class.Chain type current transformer has structure height modularization, friendship low to device voltage class requirement
The advantages such as output harmonic wave characteristic is good are flowed, are favored in mesohigh large-power occasions.Compared to other large capacity connect-in strategies, chain
The use of formula current transformer is also significantly reduced the concatenated quantity of battery cell, while battery unit is also able to satisfy chain structure to more
The demand of a independent current source, therefore chain type topology is highly suitable as the power unsteady flow of the hanging battery energy storage system of high-capacity direct
Device.
As shown in Figure 1, existing chain type energy accumulation current converter circuit Neutron module uses H bridge structure, battery module is through passive
Filter circuit (such as filter inductance) accesses submodule DC side.Each submodule is equivalent to a single-phase DC-AC power transformation electricity
Road, instantaneous power mainly include the AC ripple components of flip-flop and twice of power frequency, due to power conservation, H bridge direct current
The largely low-frequency ac ripple component based on two frequencys multiplication will be contained in the electric current of side.If taking no action to, most of low frequency arteries and veins
Streaming current can flow directly into DC side energy-storage battery, this will reduce the accuracy of BMS signal acquisition, increase system loss, and
The fever increase, aging acceleration and life time decay for leading to battery unit, to influence the operational reliability of system.For existing
Chain type energy accumulation current converter in battery current low-frequency ripple electric current excess problem, Authorization Notice No. is 103280829 B of CN
Patent of invention proposes a kind of isolation double-stage chain type current transformer applied to high capacity cell energy storage, by chain type current transformer
Between each H bridge intermediate dc lateral capacitance and battery increase a two-way isolating full-bridge current transformer, to completely isolated battery module with
Power grid increases the safety and reliability of battery energy storage system, and still, structure is complicated, cost for this isolation double-stage chain type current transformer
It is higher, it is unfavorable for promoting the use of in power grid.
Utility model content
Based on this, the utility model provides a kind of single-stage chain type energy accumulation current converter and energy-storage system, is guaranteeing energy storage system
On the basis of the operational reliability and efficiency of system, the single-stage chain type energy accumulation current converter structure is simple, at low cost.
The utility model embodiment provides a kind of single-stage chain type energy accumulation current converter, comprising: is connected on three phase network simultaneously
The three-phase chain type current transformer connected in a manner of delta connection, chain type current transformer described in every phase includes: multiple submodule, Duo Gesuo
The exchange side for stating submodule is sequentially connected in series；The submodule includes: inverter circuit, battery module, the first filter circuit and
Two filter circuits；Output end and second filter circuit of the input terminal of the battery module, first filter circuit
Input terminal connection, the output end of second filter circuit are connect with the first exchange end of the inverter circuit；The battery mould
The output end of block is connect with the first DC terminal of the inverter circuit；The input terminal of first filter circuit and inversion electricity
Second DC terminal on road connects.
Preferably, the single-stage chain type energy accumulation current converter further include: third filter circuit, the multiple submodule pass through institute
It states third filter circuit and accesses the three phase network.
Preferably, first filter circuit includes: first capacitor, and one end of the capacitor is connected to first filtering
The input terminal of circuit, the other end of the first capacitor are connected to the output end of first filter circuit.
Preferably, second filter circuit includes: the first filter inductance, and one end of first filter inductance is connected to
The input terminal of second filter circuit, the other end of first filter inductance are connected to the output of second filter circuit
End.
Preferably, the third filter circuit includes: the second filter inductance, and one end of second filter inductance is connected to
The input terminal of the third filter circuit, the other end of second filter inductance are connected to the output of the third filter circuit
End, to access the three phase network.
Preferably, the inverter circuit includes: first switch device, second switch device, third switching device and
Four switching devices；The first end of the first switch device, the first end of the third switching device are connected to the inversion electricity
Second DC terminal on road, the second end of the first switch device are connect with the first end of the second switch device, and described
The second end of three switching devices is connect with the first end of the 4th switching device, the second end of the second switch device, institute
The second end for stating the 4th switching device is connected to the first DC terminal of the inverter circuit；The first switch device and described the
The connection midpoint of two switching devices exchanges end as the first of the inverter circuit, and the third switching device is opened with the described 4th
The connection midpoint for closing device exchanges end as the second of the inverter circuit.
On the other hand the utility model provides a kind of energy-storage system, comprising: three phase network and such as above-mentioned single-stage chain
Formula energy accumulation current converter.
Compared with the existing technology, a kind of beneficial effect of single-stage chain type energy accumulation current converter provided by the utility model is:
The single-stage chain type energy accumulation current converter, comprising: the three-phase chain type for being connected on three phase network and being connected in a manner of delta connection
Current transformer, chain type current transformer described in every phase includes: multiple submodule, and the exchange side of multiple submodules is sequentially connected in series；It is described
Submodule includes: inverter circuit, battery module, the first filter circuit and the second filter circuit；The input of the battery module
End, first filter circuit output end connect with the input terminal of second filter circuit, second filter circuit
Output end is connect with the first exchange end of the inverter circuit；The first of the output end of the battery module and the inverter circuit
DC terminal connection；The input terminal of first filter circuit is connect with the second DC terminal of the inverter circuit.The single-stage chain
Formula energy accumulation current converter structure is simple, at low cost, while can guarantee the operational reliability and efficiency of energy-storage system.
Detailed description of the invention
Fig. 1 is the circuit diagram of existing chain type energy accumulation current converter；
Fig. 2 is a kind of circuit diagram of single-stage chain type energy accumulation current converter provided by the embodiment of the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
Every other embodiment obtained, fall within the protection scope of the utility model.
Referring to Fig. 2, it is that the utility model embodiment provides a kind of circuit signal of single-stage chain type energy accumulation current converter
Figure, the single-stage chain type energy accumulation current converter include:
It is connected to three phase network (Ua、Ub、Uc) on and connected in a manner of delta connection ab phase chain type current transformer, bc phase
The circuit structure of chain type current transformer and ca phase chain type current transformer, chain type current transformer described in every phase is identical, below with ab phase chain type
It is illustrated for current transformer, ab phase chain type current transformer includes: multiple submodule (ab1、ab2……abi……abN), it is multiple
The exchange side of the submodule is sequentially connected in series, and DC side is independent of one another；Each submodule abiIt include: inverter circuit, battery module
E, the first filter circuit 1 and the second filter circuit 2；The input terminal of the battery module E, first filter circuit 1 it is defeated
Outlet is connect with the input terminal of second filter circuit 2, output end and the inverter circuit of second filter circuit 2
First exchange end Y connection；The output end of the battery module E is connect with the first DC terminal DC1 of the inverter circuit；It is described
The input terminal of first filter circuit 1 is connect with the second DC terminal DC2 of the inverter circuit.Submodule abiMiddle inverter circuit
Second exchange end X is connected to the first exchange end Y, submodule ab of the inverter circuit of a submoduleiThe of middle inverter circuit
One exchange end Y is connected to the second exchange end X of the inverter circuit of next submodule, to be to realize multiple submodule (ab1、
ab2……abi……abN) exchange side be sequentially connected in series.
Chain type current transformer is connected to three phase network, is energy storage unsteady flow energy transmission and transformation as the core of energy storage unsteady flow
Executing agency, be responsible for the power storage in three phase network is released into battery module E, or by the electric energy in battery module E
It is put into three phase network.Chain type current transformer cooperate advanced control instruction may be implemented peak-frequency regulation, emergency service, backup power supply,
Smooth power or load curve, and the effects of improvement power quality.The battery module E can be lithium battery, plumbic acid electricity
Mixed, the battery module of the secondary cells of electrochemical mediators such as pond, lead carbon battery or two or more above-mentioned batteries
E can select to use according to actual needs, not do specific restriction in the present invention.
The utility model embodiment is connected using the exchange side of multiple submodule, realizes the high voltage of no step-up transformer
Output, while the equivalent switching frequency of chain type current transformer improves, it is assumed that the switching frequency of single inverter circuit is f, each chain type
N number of chain link (i.e. N number of inverter circuit) is shared in current transformer, then the equivalent switching frequency of each chain type current transformer is Nf, then single-stage
Chain type energy accumulation current converter output voltage current harmonic content reduces, and the single-stage chain type energy accumulation current converter is without increasing additional circuit member
Device (such as increasing a two-way isolating full-bridge current transformer), passes through first filter circuit 1, second filter circuit 2
And control method appropriate, it can further increase transfer efficiency, realize in chain type energy accumulation current converter battery current
The inhibition of low-frequency ripple ingredient avoids influence of the low-frequency ripple signal to BMS signal acquisition accuracy, improves battery life, storage
Energy system effectiveness and operational reliability, the structure of the single-stage chain type energy accumulation current converter is simple, cost is relatively low, has in power grid wide
General application prospect.
In an alternative embodiment, the inverter circuit includes: first switch device S1, second switch device S2,
Three switching device S3And the 4th switching device S4；The first switch device S1First end, the third switching device S3's
First end is connected to the second DC terminal DC2, the first switch device S of the inverter circuit1Second end and described second
Switching device S2First end connection, the third switching device S3Second end and the 4th switching device S4First end
Connection, the second switch device S2Second end, the 4th switching device S4Second end be connected to the inverter circuit
First DC terminal DC1；The first switch device S1With the second switch device S2Connection midpoint as the inverter circuit
First exchange end Y, the third switching device S3With the 4th switching device S4Connection midpoint as the inverter circuit
Second exchange end X.
In the present embodiment, first switch device S1, second switch device S2, third switching device S3And the 4th switch
Device S4It can be IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor), IGCT
(Integrated Gate Commutated Thyristors, integrated gate commutated thyristor) or IEGT (Injection
Enhanced Gate Transistor, electron injection enhancement gate transistor).In the present embodiment, first switch device S1,
Two switching device S2The DC/DC bridge arm of H bridge in series, third switching device S34th switching device S4H bridge in series
DC/AC bridge arm, the midpoint of DC/DC bridge arm are the first exchange end Y；The midpoint of DC/AC bridge arm is the second exchange end X.
In an alternative embodiment, first filter circuit 1 includes: first capacitor Cbus, the capacitor Cbus's
One end is connected to the input terminal of first filter circuit 1, the first capacitor CbusThe other end be connected to it is described first filtering
The output end of circuit 1.
In an alternative embodiment, second filter circuit 2 includes: the first filter inductance Lin, first filter
Wave inductance LinOne end be connected to the input terminal of second filter circuit 2, the first filter inductance LinThe other end connection
In the output end of second filter circuit 2.
In the present invention, battery module E and first capacitor CbusSeries connection, battery module E and first capacitor CbusCompany
It connects midpoint and passes through the first filter inductance LinIt is connected to the corresponding first exchange end Y, first capacitor C in midpoint of DC/DC bridge armbusWith
First filter inductance LinTogether for reducing two frequency multiplication ripple signals, so that the low-frequency ripple signal that battery module E is generated passes through
First capacitor CbusWith the first filter inductance LinInhibit, the output electric current of smooth battery module E, improves the work item of battery module E
Part avoids influence of the low-frequency ripple signal to BMS signal acquisition accuracy, and improves battery module service life, energy-storage system efficiency
And operational reliability, only it need to increase first capacitor C in each submodulebusWith the first filter inductance Lin, the structure letter of submodule
List, cost is relatively low.
In an alternative embodiment, the single-stage chain type energy accumulation current converter further include: third filter circuit 3, it is described
Multiple submodule accesses the three phase network by the third filter circuit 3.
In an alternative embodiment, the third filter circuit 3 includes: the second filter inductance Lg, second filter
Wave inductance LgOne end be connected to the input terminal of the third filter circuit 3, the second filter inductance LgThe other end be connected to
The output end of the third filter circuit 3, to access the three phase network.
In the present embodiment, ab phase chain type current transformer, bc phase chain type current transformer, multiple sons described in ca phase chain type current transformer
Module passes through the second filter inductance LgIt is linked into the positive and negative busbar of the DC bus in three phase network, battery can be further smoothed
The low-frequency ripple signal that module E is generated, low-frequency ripple signal inhibitory effect are more preferable.
In an alternative embodiment, the single-stage chain type energy accumulation current converter further include: AC current control device is (in figure
Be not shown), multiple DC capacitor controller (not shown)s and pulse signal generator (not shown)；Multiple institutes
The signal input part for stating DC capacitor controller connects one to one on the first filter circuit of multiple submodules；It is described
The signal input part of AC current control device is connected to the power grid connecting pin of the chain type current transformer；Multiple DC capacitor controls
The signal of the signal output end of device processed, the signal output end of the AC current control device and the pulse signal generator inputs
End connection, the signal output end of the pulse signal generator are connected on the inverter circuit.
On the other hand the utility model provides a kind of energy-storage system, comprising: three phase network and such as above-mentioned single-stage chain
Formula energy accumulation current converter.
Compared with the existing technology, a kind of beneficial effect of single-stage chain type energy accumulation current converter provided by the utility model is:
The single-stage chain type energy accumulation current converter, comprising: the three-phase chain type for being connected on three phase network and being connected in a manner of delta connection
Current transformer, chain type current transformer described in every phase includes: multiple submodule, and the exchange side of multiple submodules is sequentially connected in series；It is described
Submodule includes: inverter circuit, battery module, the first filter circuit and the second filter circuit；The input of the battery module
End, first filter circuit output end connect with the input terminal of second filter circuit, second filter circuit
Output end is connect with the first exchange end of the inverter circuit；The first of the output end of the battery module and the inverter circuit
DC terminal connection；The input terminal of first filter circuit is connect with the second DC terminal of the inverter circuit.The single-stage chain
Formula energy accumulation current converter structure is simple, at low cost, while can guarantee the operational reliability and efficiency of energy-storage system.
The above is preferred embodiments of the present invention, it is noted that for the ordinary skill of the art
For personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these are improved and profit
Decorations are also considered as the protection scope of the utility model.
Claims (7)
1. a kind of single-stage chain type energy accumulation current converter characterized by comprising be connected on three phase network and with delta connection side
The three-phase chain type current transformer of formula connection, chain type current transformer described in every phase includes: multiple submodule, the exchange of multiple submodules
Side is sequentially connected in series；The submodule includes: inverter circuit, battery module, the first filter circuit and the second filter circuit；It is described
The input terminal of battery module, first filter circuit output end connect with the input terminal of second filter circuit, it is described
The output end of second filter circuit is connect with the first exchange end of the inverter circuit；The output end of the battery module with it is described
First DC terminal of inverter circuit connects；The input terminal of first filter circuit and the second DC terminal of the inverter circuit connect
It connects.
2. single-stage chain type energy accumulation current converter as described in claim 1, which is characterized in that the single-stage chain type energy accumulation current converter is also
It include: third filter circuit, the multiple submodule accesses the three phase network by the third filter circuit.
3. single-stage chain type energy accumulation current converter as described in claim 1, which is characterized in that first filter circuit includes:
One capacitor, one end of the capacitor are connected to the input terminal of first filter circuit, the other end connection of the first capacitor
In the output end of first filter circuit.
4. single-stage chain type energy accumulation current converter as described in claim 1, which is characterized in that second filter circuit includes:
One filter inductance, one end of first filter inductance are connected to the input terminal of second filter circuit, first filtering
The other end of inductance is connected to the output end of second filter circuit.
5. single-stage chain type energy accumulation current converter as claimed in claim 2, which is characterized in that the third filter circuit includes:
Two filter inductances, one end of second filter inductance are connected to the input terminal of the third filter circuit, second filtering
The other end of inductance is connected to the output end of the third filter circuit, to access the three phase network.
6. single-stage chain type energy accumulation current converter as described in claim 1, which is characterized in that the inverter circuit includes: first to open
Close device, second switch device, third switching device and the 4th switching device；The first end of the first switch device, institute
The first end for stating third switching device is connected to the second DC terminal of the inverter circuit, the second end of the first switch device
It is connect with the first end of the second switch device, the of the second end of the third switching device and the 4th switching device
One end connection, the second end of the second switch device, the second end of the 4th switching device are connected to the inverter circuit
The first DC terminal；The connection midpoint of the first switch device and the second switch device as the inverter circuit the
It is handed over as the second of the inverter circuit at the connection midpoint of one exchange end, the third switching device and the 4th switching device
Flow end.
7. a kind of energy-storage system characterized by comprising three phase network and single-stage as claimed in any one of claims 1 to 6
Chain type energy accumulation current converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821754283.9U CN209344797U (en) | 2018-10-26 | 2018-10-26 | Single-stage chain type energy storage converter and energy storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821754283.9U CN209344797U (en) | 2018-10-26 | 2018-10-26 | Single-stage chain type energy storage converter and energy storage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209344797U true CN209344797U (en) | 2019-09-03 |
Family
ID=67746768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821754283.9U Active CN209344797U (en) | 2018-10-26 | 2018-10-26 | Single-stage chain type energy storage converter and energy storage system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209344797U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111009913A (en) * | 2019-11-15 | 2020-04-14 | 国网浙江省电力有限公司嘉兴供电公司 | Battery echelon utilization cascade energy storage system for multi-station fusion |
| CN114465255A (en) * | 2022-01-06 | 2022-05-10 | 中国能源建设集团广东省电力设计研究院有限公司 | Angle-shaped modular electric energy storage system |
-
2018
- 2018-10-26 CN CN201821754283.9U patent/CN209344797U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111009913A (en) * | 2019-11-15 | 2020-04-14 | 国网浙江省电力有限公司嘉兴供电公司 | Battery echelon utilization cascade energy storage system for multi-station fusion |
| CN114465255A (en) * | 2022-01-06 | 2022-05-10 | 中国能源建设集团广东省电力设计研究院有限公司 | Angle-shaped modular electric energy storage system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9502991B2 (en) | Hybrid converter and wind power generating system | |
| US9190920B2 (en) | H-bridge micro inverter grid-connected device | |
| WO2019029694A1 (en) | Conversion circuit, control method, and power supply device | |
| CN103401462B (en) | Based on the single-phase chain static synchronous compensator of three level H bridge cascade | |
| CN103208929A (en) | Electronic power transformer based on multi-media card (MMC) | |
| Mancilla-David et al. | A comparative evaluation of series power-flow controllers using DC-and AC-link converters | |
| CN103236706A (en) | Battery energy storage system based on modular multilevel AC-AC (Alternating Current-Alternating Current) converter topology | |
| CN104410260A (en) | Fault-tolerance-capability-equipped MMC sub-module structure capable of realizing DC fault self-protection, and MMC modulation method thereof | |
| CN104852583A (en) | High-frequency chain multi-level direct current transformer for medium and low voltage direct current distribution | |
| Vilathgamuwa et al. | Rectifier systems for variable speed wind generation-a review | |
| Hao et al. | Tap for classical HVDC based on multilevel current-source inverters | |
| CN101567567A (en) | Carrier shifting inversion large power photovoltaic grid-connection system and control method thereof | |
| CN105071679A (en) | Five-level self-balanced inverter based on bridge switched capacitor module | |
| CN203399013U (en) | Static synchronous compensator based on three-level H bridge cascade and voltage source inversion module | |
| CN209344797U (en) | Single-stage chain type energy storage converter and energy storage system | |
| Wang et al. | An X-type boost multilevel inverter based on switched capacitor cells with low-voltage stress and high-frequency applications | |
| Borgaonkar | Solid state transformers: A review of technology and applications | |
| CN204578373U (en) | High-frequency chain multi-level direct current transformer for medium and low voltage direct current distribution | |
| Lu et al. | A new power circuit topology for energy router | |
| Zhang et al. | A monopolar symmetrical hybrid cascaded DC/DC converter for HVDC interconnections | |
| CN108023496B (en) | Series simultaneous selection switch voltage type single-stage multi-input low-frequency link inverter | |
| CN111404409A (en) | Multi-port power electronic transformer topology based on MMC and control method thereof | |
| CN212012496U (en) | Multi-port non-latching direct-current autotransformer | |
| CN110707699B (en) | Modular multi-level hybrid distribution transformer | |
| Hou et al. | Topologies and operations of hybrid-type DC–DC converters interfacing DC-current bus and DC-voltage bus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |