CN201774269U - Battery energy storage topological structure without transformer - Google Patents
Battery energy storage topological structure without transformer Download PDFInfo
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- CN201774269U CN201774269U CN2010202679508U CN201020267950U CN201774269U CN 201774269 U CN201774269 U CN 201774269U CN 2010202679508 U CN2010202679508 U CN 2010202679508U CN 201020267950 U CN201020267950 U CN 201020267950U CN 201774269 U CN201774269 U CN 201774269U
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- energy storage
- battery energy
- topological structure
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- switch
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The utility model relates to a battery energy storage topological structure without a transformer. The topological structure comprises three phases that are connected in series by a sub unit consisting of a plurality of H bridge power modules and battery energy storage modules, and accessed to a power grid through a buffering inductor. Each H bridge power module consists of four IGBT (Insulated Gate Bipolar Transistor) switch elements, each IGBT switch element is inversely connected with a diode, and after connected in series, every two IGBT switch elements are connected with a direct current capacitor C. The battery energy storage modules are formed by series connection of a battery pack and a switch, and then connected with the capacitor of the H bridge power modules in parallel. The switch is also connected with a resistor in parallel. The topological structure is connected on the power grid in parallel and can inhibit the electric pollution of the power grid, compensate for the stability of photovoltaic or wind energy power generation, and provide uninterrupted, clean, stable and high-quality sine wave voltage without frequency discontinuity for the load on the power grid.
Description
Technical field
The utility model relates to a kind of transless battery energy storage topological structure, is used for the high-voltage electric power system field, makes the electrical network supply load reliable, high-quality voltage.
Background technology
At present, there are following nine kinds of problems at least in electrical network: outage, thunderbolt spike, surge, frequency oscillation, voltage jump, voltage fluctuation, frequency drift, electric voltage dropping, impulse disturbances etc.Regenerative resource is also extremely instability of photovoltaic or electric energy that wind energy produced for example, the new forms of energy scale of using that is incorporated into the power networks is big more, electrical network is just dangerous more, practice according to domestic and international honourable electric station grid connection, can realize the balance output of generation of electricity by new energy power making large-scale wind power and solar electric power incorporate conventional electrical network easily and reliably into by energy storage technology.
At present the electric power energy storage device all is in parallel by transformer and electrical network, adopts transformer, makes that equipment investment is big, occupation of land is many, the cost height, and the production cycle is long.
Summary of the invention
The purpose of this utility model provides a kind of transless battery energy storage topology, it is connected in parallel on the electrical network, those electric pollutions that can suppress electrical network, can compensate the unsteadiness of photovoltaic or wind power generation, to the load on the electrical network provide uninterruptedly, clean, stable, no frequency discontinuity, high-quality sine voltage.
For achieving the above object, the utility model is achieved through the following technical solutions:
A kind of transless battery energy storage topological structure, this topological structure comprises three-phase, every subelement that is made of a plurality of H bridge power models and battery energy storage module is cascaded, and inserts electrical network through buffer inductance.
Described H bridge power model is made up of four IGBT switching devices, and diode of each IGBT switching device inverse parallel is after per two IGBT switching devices are in series, in parallel with dc capacitor C again.
Described battery energy storage module is in series by battery pack and switch, and is in parallel with the electric capacity of H bridge power model again.Described switch also is parallel with resistance.
Compared with prior art, the beneficial effects of the utility model are:
1) input transless, and then make and under this battery energy storage topology apparatus and same voltage, the power grade comparing of transformer arranged, the production cycle reduces half, and volume reduces half, and cost reduces half, and floor space reduces half, and convenient transportation is simple in structure;
2) battery energy storage has the energy efficiency height, can realize fast charging and discharging, and the life-span is long.
3) reduce or to improve capacitance grade fairly simple, a number of unit that only needs to reduce or increase series connection gets final product.
Description of drawings
Fig. 1 is a transless battery energy storage topology diagram;
Fig. 2 is transless battery energy storage topology basic cell structure figure.
Embodiment
See Fig. 1, a kind of transless battery energy storage topological structure, this topological structure comprises three-phase, every subelement that is made of a plurality of H bridge power models and battery energy storage module is cascaded, and inserts electrical network through buffer inductance L.Inductance L also connects buffer resistance R, and after buffer resistance R and K switch 2 were in parallel, K1 was connected with circuit breaker.
See Fig. 2, H bridge power model is made up of IGBT1, IGBT2, four switching devices of IGBT3, IGBT4, and switching device IGBT1 and IGBT2 are in series, and switching device IGBT3 and IGBT4 are in series, again with dc capacitor C parallel connection.And four switching device IGBT1, IGBT2, IGBT3, IGBT4 distinguish a reversal connection diode D1 in parallel, D2, D3, D4.Input, output that the common port of IGBT1 and IGBT2, IGBT3 and the common port of IGBT4 are connected with other power model for this power model.
The battery energy storage module is in series by battery pack E and switch S, and is in parallel with the capacitor C of H bridge power model again, switch S also be parallel with resistance R '.
When the electrical network output voltage was undesired, Fig. 1 adopted many power unit cascade output high pressure, exports many level waveform by modulation algorithm, produced the load on the high-quality sine voltage supply electrical network.
When line voltage produces spike, voltage is powered to DC side by diode, opens each unit switch S of (as shown in Figure 2), at this moment, battery energy storage topology dc bus capacitor of the present utility model and battery absorb electric network peak, and then have suppressed the influence of electric network peak to equipment on the electrical network.When line voltage falls suddenly or interrupts, by controlling each unit IGBT1～IGBT4 of (as shown in Figure 2), open S, at this moment, the energy feedback grid in dc bus capacitor and the battery makes electrical network output normal sinusoidal wave.When line voltage just often, turn-off IGBT1～IGBT4, stopcock S, at this moment, store energy is in battery.
The electrical network that battery energy storage topology of the present utility model can be 1～500KV is done redundant electrical power, can suppress the unsteadiness of wind power generation or photovoltaic generation, and its key character is the input transless, and volume is little, and cost is low.This battery energy storage topology is by the method for units in series, and the output high pressure has saved step-up transformer used when being incorporated into the power networks, and saved great amount of cost and topological structure is simple, and is easy to removal and installation.Described unit is that H bridge type module comprises four IGBT devices, and per two constitute a bridge, and each module also comprises dc filter capacitor and the battery that is in parallel with electric capacity.When needs improved electric pressure, the number of unit that only needs to improve series connection got final product.In addition,, can export many level waveform, produce high-quality sine voltage by modulation algorithm owing to adopt multiple unit series connection power cell output high pressure.
Described H bridge power model comprises four IGBT devices, and it has constituted the bridge of a rectifiable possibility of reversal, and the switch S control battery of back absorbs or discharge electric energy.When switch S is the high speed turn-off device, during as IGBT, also can save the resistance that is in parallel with it.
The utility model improves according to actual needs or to reduce capacity fairly simple, only need increase or reduce number of unit and get final product.
Claims (4)
1. a transless battery energy storage topological structure is characterized in that this topological structure comprises three-phase, and every subelement that is made of a plurality of H bridge power models and battery energy storage module is cascaded, and inserts electrical network through buffer inductance.
2. transless battery energy storage topological structure according to claim 1, it is characterized in that described H bridge power model is made up of four IGBT switching devices, diode of each IGBT switching device inverse parallel, after per two IGBT switching devices are in series, in parallel with dc capacitor C again.
3. transless battery energy storage topological structure according to claim 1 and 2 is characterized in that described battery energy storage module is in series by battery pack and switch, and is in parallel with the electric capacity of H bridge power model again.
4. transless battery energy storage topological structure according to claim 3 is characterized in that described switch also is parallel with resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202679508U CN201774269U (en) | 2010-07-22 | 2010-07-22 | Battery energy storage topological structure without transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202679508U CN201774269U (en) | 2010-07-22 | 2010-07-22 | Battery energy storage topological structure without transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201774269U true CN201774269U (en) | 2011-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202679508U Expired - Fee Related CN201774269U (en) | 2010-07-22 | 2010-07-22 | Battery energy storage topological structure without transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201774269U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102025165A (en) * | 2010-07-22 | 2011-04-20 | 荣信电力电子股份有限公司 | Transformerless battery energy storing topological structure |
| CN102496939A (en) * | 2011-12-01 | 2012-06-13 | 华北电网有限公司唐山供电公司 | High-voltage static VAR generator (SVG) capable of being operated in parallel and controlled under constant voltage |
-
2010
- 2010-07-22 CN CN2010202679508U patent/CN201774269U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102025165A (en) * | 2010-07-22 | 2011-04-20 | 荣信电力电子股份有限公司 | Transformerless battery energy storing topological structure |
| CN102496939A (en) * | 2011-12-01 | 2012-06-13 | 华北电网有限公司唐山供电公司 | High-voltage static VAR generator (SVG) capable of being operated in parallel and controlled under constant voltage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110323 Termination date: 20130722 |