CN204886203U - Qualities of wind -powered electricity generation stable and electric energy of transient state of a system that is incorporated into power networks are improved energy memory - Google Patents
Qualities of wind -powered electricity generation stable and electric energy of transient state of a system that is incorporated into power networks are improved energy memory Download PDFInfo
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- CN204886203U CN204886203U CN201520337571.4U CN201520337571U CN204886203U CN 204886203 U CN204886203 U CN 204886203U CN 201520337571 U CN201520337571 U CN 201520337571U CN 204886203 U CN204886203 U CN 204886203U
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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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Abstract
Qualities of wind -powered electricity generation stable and electric energy of transient state of a system that is incorporated into power networks are improved energy memory organizes (1), buckBoost direct -current converter (2) and PWM voltage source converter (3) including ultracapacitor system. Wherein ultracapacitor system group (1) comprises the connection in series -parallel of a plurality of monomer ultracapacitor system, can carry out energy storage and release, two -way non - isolated form direct -current converter is adopted in buckBoost direct -current converter (2), and carries out the energy exchange between the ultracapacitor system group (1), PWM voltage source converter (3) adopts the PWM technique, can realize the electric energy two -way flow. The device not only can be used to electric power system power smoothness and stable control, and is very effective to level and smooth wind -powered electricity generation field output and terminal voltage, can improve the stable and electric energy quality of transient state of network system by a wide margin, has good practical application prospect.
Description
Technical field
The utility model relates to a kind of energy storage device improving wind-electricity integration power system transient stability and the quality of power supply, can be used for the level and smooth and stability contorting of Power Systems, there is wind-powered electricity generation low voltage failure ride-through capability, very effective to smooth wind power field power output and terminal voltage, significantly can improve transient stability and the quality of power supply of grid-connected system.
Background technology
At present, wind-powered electricity generation is incorporated to electric power system becomes trend, but wind-powered electricity generation can constantly, stably can not export electric energy because of the change of the natural conditions such as wind speed, wind direction, can have an impact to the stable operation of electric power system when a large amount of wind-powered electricity generation is connected to the grid, consider based on the stability of a system and economy, system needs the electric energy storing some, in order to solution of emergent event.Therefore energy-storage system is more and more important as its effect of necessary energy snubber link of electric power system, in various energy storage technology, ultracapacitor energy storage is shown one's talent, its control procedure is more simple compared with superconducting energy storage, its reliability is high compared with flywheel energy storage, its discharge and recharge number of times is high compared with battery, the life-span is long, voltage range is wide, ultracapacitor energy storage low cost, low maintenance, life-span length, environmental friendliness, can charge at short notice complete, and the feature of macro-energy can be provided, most suitable for stability of power system, power quality and UPS aspect.
Summary of the invention
The purpose of this utility model is, designs a kind of energy storage device improving wind-electricity integration power system transient stability and the quality of power supply; It utilizes ultracapacitor assembly array to be stored with the form of electric field energy by energy, when energy promptly lacks or needs, again the energy of storage is discharged by control system, gaining merit with idle quickly and accurately required for bucking-out system, thus realize balance, the stability contorting of electric energy.
For achieving the above object, the technical solution of the utility model is: the energy storage device improving wind-electricity integration power system transient stability and the quality of power supply, comprise bank of super capacitors (1), Buck/Boost DC converter (2) and PWM voltage source converter (3), bank of super capacitors (1) is connected with Buck/Boost DC converter (2), and Buck/Boost DC converter (2) is connected with PWM voltage source converter (3).
Described bank of super capacitors (1) is made up of the connection in series-parallel of multiple monomer ultracapacitor, and bank of super capacitors (1) is easy to charging and discharging, and terminal voltage excursion is large, and its charging voltage can reach more than 400V.
Described Buck/Boost DC converter (2) is two-way non-isolation type DC-DC converter.Buck/Boost DC converter (2) does not have the requirement isolated, insulate, number of devices is few, cheap, there is no transformer loss, efficiency is high, be easy to packaging and integrated, control circuit simply, by carrying out energy exchange between Buck/Boost DC converter (2) and bank of super capacitors (1).
Described PWM voltage source converter (3) adopts PWM technology, can realize realizing bidirectional electric energy flow, when electric energy flows to load by electrical network, be in rectification state, when circuit is to electrical network feedback electric energy, be in inverter mode.
Described PWM voltage source converter (3) has the function of realizing bidirectional electric energy flow, and its DC side adopts capacitor filtering, and carries out energy storage, makes whole current transformer present low-impedance voltage source characteristic.
Described PWM voltage source converter (3) provides power electronics interface between AC electric power systems and bank of super capacitors (1), DC-link voltage and line voltage can be made to remain constant by PWM voltage source converter (3).
The beneficial effects of the utility model are: the energy storage device of this raising wind-electricity integration power system transient stability and the quality of power supply, owing to adopting bank of super capacitors (1) energy storage, it not only can the power output of level and smooth wind turbine generator, can also export by adjustable side voltage, when main power source interrupt or when causing system voltage to reduce due to reasons such as loose contacts, bank of super capacitors (1) just can play standby supplementary function; Adopt Buck/Boost DC converter (2) can control active power; Adopt PWM voltage source converter (3) that busbar voltage and power system reactive power can be controlled.This device not only can be used for the level and smooth and stability contorting of Power Systems, to smooth wind power field power output and terminal voltage very effective, there is good actual application prospect.
Accompanying drawing explanation
Fig. 1 bank of super capacitors energy storage device.
Fig. 2 bank of super capacitors.
Fig. 3 Buck/Boost DC converter.
Fig. 4 PWM voltage source converter.
Embodiment
Below in conjunction with drawings and Examples, the utility model patent is further illustrated.
In Fig. 1, bank of super capacitors (1) is connected with Buck/Boost DC converter (2), and Buck/Boost DC converter (2) is connected with PWM voltage source converter (3).
In Fig. 2, described bank of super capacitors (1) is made up of the connection in series-parallel of multiple monomer ultracapacitor, can carry out energy storage and release, in parallel again after multiple ultracapacitor series connection, both can reduce internal resistance, and can improve again the voltage of device; Monomer ultracapacitor adopts little, the high specific surface area of equivalent internal resistance, stablize the active carbon of chemical properties and cheap expense prepares, and each monomer ultracapacitor can be composed in series with an equivalent resistance and ideal capacitor.
In Fig. 3, described Buck/Boost DC converter (2) is two-way non-isolation type DC-DC converter, and DC bus is by carrying out energy exchange between Buck/Boost DC converter (2) and bank of super capacitors (1).
In Fig. 3, described Buck/Boost DC converter (2) do not have isolate, insulation requirement, number of devices is few, cheap, does not have transformer loss, and efficiency is high, be easy to packaging and integrated, control circuit is simple.
In Fig. 4, described PWM voltage source converter (3) adopts PWM technology, can realize realizing bidirectional electric energy flow, when electric energy flows to load by electrical network, be in rectification state, when circuit is to electrical network feedback electric energy, be in inverter mode.
In Fig. 4, described PWM voltage source converter (3) has the function of realizing bidirectional electric energy flow, and its DC side adopts capacitor filtering, and carries out energy storage, makes whole current transformer present low-impedance voltage source characteristic.
In Fig. 4, described PWM voltage source converter (3) provides power electronics interface between AC electric power systems and bank of super capacitors (1), DC-link voltage and line voltage can be made to remain constant by PWM voltage source converter (3).
Raising wind-electricity integration power system transient stability described by the utility model patent and the energy storage device of the quality of power supply, not only can be used for the level and smooth and stability contorting of Power Systems, very effective to smooth wind power field power output and terminal voltage, significantly can improve transient stability and the quality of power supply of grid-connected system.
Claims (4)
1. improve the energy storage device of wind-electricity integration power system transient stability and the quality of power supply, it is characterized in that: comprise bank of super capacitors (1), Buck/Boost DC converter (2) and PWM voltage source converter (3), bank of super capacitors (1) is connected with Buck/Boost DC converter (2), and Buck/Boost DC converter (2) is connected with PWM voltage source converter (3).
2. the energy storage device of raising wind-electricity integration power system transient stability according to claim 1 and the quality of power supply, is characterized in that: described bank of super capacitors (1) is made up of the connection in series-parallel of multiple monomer ultracapacitor.
3. the energy storage device of raising wind-electricity integration power system transient stability according to claim 1 and the quality of power supply, is characterized in that: described Buck/Boost DC converter (2) is two-way non-isolation type DC-DC converter.
4. the energy storage device of raising wind-electricity integration power system transient stability according to claim 1 and the quality of power supply, it is characterized in that: described PWM voltage source converter (3) has the function of realizing bidirectional electric energy flow, its DC side adopts capacitor filtering, and carry out energy storage, make whole current transformer present low-impedance voltage source characteristic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520337571.4U CN204886203U (en) | 2015-05-25 | 2015-05-25 | Qualities of wind -powered electricity generation stable and electric energy of transient state of a system that is incorporated into power networks are improved energy memory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520337571.4U CN204886203U (en) | 2015-05-25 | 2015-05-25 | Qualities of wind -powered electricity generation stable and electric energy of transient state of a system that is incorporated into power networks are improved energy memory |
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| Publication Number | Publication Date |
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| CN204886203U true CN204886203U (en) | 2015-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520337571.4U Expired - Fee Related CN204886203U (en) | 2015-05-25 | 2015-05-25 | Qualities of wind -powered electricity generation stable and electric energy of transient state of a system that is incorporated into power networks are improved energy memory |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541285A (en) * | 2018-12-26 | 2019-03-29 | 东莞市长工微电子有限公司 | BuckBoost circuit output current detection method and its detection circuit |
| CN110402527A (en) * | 2017-04-27 | 2019-11-01 | 韩国电力公社 | The devices and methods therefor of ESS is controlled according to transient stability state |
-
2015
- 2015-05-25 CN CN201520337571.4U patent/CN204886203U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110402527A (en) * | 2017-04-27 | 2019-11-01 | 韩国电力公社 | The devices and methods therefor of ESS is controlled according to transient stability state |
| CN109541285A (en) * | 2018-12-26 | 2019-03-29 | 东莞市长工微电子有限公司 | BuckBoost circuit output current detection method and its detection circuit |
| CN109541285B (en) * | 2018-12-26 | 2020-12-08 | 东莞市长工微电子有限公司 | Buckboost circuit output current detection method and detection circuit thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151216 Termination date: 20160525 |