CN205595802U - A and web frame for compressed air energy storage system - Google Patents
A and web frame for compressed air energy storage system Download PDFInfo
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- CN205595802U CN205595802U CN201620447108.XU CN201620447108U CN205595802U CN 205595802 U CN205595802 U CN 205595802U CN 201620447108 U CN201620447108 U CN 201620447108U CN 205595802 U CN205595802 U CN 205595802U
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- 238000004146 energy storage Methods 0.000 title claims abstract description 58
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- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 abstract 1
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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Abstract
The utility model discloses an and web frame for compressed air energy storage system, loop through during motor side converter, DCDC converter, grid -connected inverter insert AC electric network its characterized in that including the electric energy of energy storage equipment: and the web frame be equipped with and loop through motor side inner ring controller and motor behind the state information of motor side real -time collect motor of outer loop controller and motor side converter and incline the PWM generator and incline motor rotation number, direct current side voltage, the quick -witted terminal voltage of converter to the motor and control, since the above structure is adopted, the utility model discloses ensure that the load characteristics when the energy storage of compressed air energy storage system is stable, conversion efficiency is high to when the electric wire netting is in the load low ebb, realize the extensive storage of electric energy.
Description
Technical field
This utility model relates to compressed air energy storage technology field, particularly to a kind of for compressed-air energy-storage system
Grid connected structure.
Background technology
Compressed-air energy storage (Compressed air energy storage, CAES) uses the form of pressure-air to enter
Row electric power stores.In thermal energy storage process, power driven compressor (or directly being driven by mechanical energy) compressed air is also stored in gas storage
In room；Exoergic process then discharges pressure-air expansion work, drives the external output power of electromotor.
Compared with other energy storage technologies, compressed-air energy-storage system has that small investment, operation and maintenance cost be low, dynamic response
Hurry up, the method for operation is flexible, economic performance is high, environmental pollution is little, floor space is little feature, gradually paid attention to by various countries.Moral
All there are compressed-air energy storage power station in the developed countries such as state, the U.S., Japan, Italy just in process of construction.China greatly develops
Compressed air energy storage technology has important strategic importance at economy, society and national security aspect, and it can promote China's intelligence
Electrical network related industry and the fast development of Grand Equipments manufacturing technology.
But the scarcity in compressed-air energy storage rationale and experimental system research and deficiency, the most existing at present
Compressed-air energy-storage system research still fails to break through the key technologies such as grid-connected, seriously limits the further of compressed-air energy-storage system
Development.
For upper problem, it is provided that a kind of novel grid connected structure, it is ensured that compressed-air energy-storage system load when energy storage is special
Property stable, conversion efficiency is high, and when electrical network is in load valley, it is achieved the large scale storage of electric energy.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of grid-connected knot for compressed-air energy-storage system
Structure, it is ensured that compressed-air energy-storage system part throttle characteristics when energy storage is stable, and conversion efficiency is high, and electrical network is in load valley
Time, it is achieved the large scale storage of electric energy.
For reaching above-mentioned purpose, the technical solution of the utility model is, a kind of grid-connected for compressed-air energy-storage system
Structure, passes sequentially through motor side current transformer including the electric energy of energy storage device, DC/DC changer, combining inverter are linked into exchange
In electrical network, it is characterised in that: described grid connected structure is provided with the outer ring controller motor in real time of motor side and motor side unsteady flow
Pass sequentially through ring controller and motor side PWM generator in motor side after the status information of device the motor of motor side current transformer is turned
Speed, DC voltage, set end voltage are controlled；Described grid connected structure is provided with the exchange of voltage power computing unit Real-time Collection
The voltage of electrical network and power are also transported to grid-connected outer ring controller and produce reference signal to grid-connected interior ring controller, grid-connected internal ring control
Device processed carries out electric current regulation by grid-connected PWM generator to combining inverter；Described grid connected structure is provided with outer ring controller and adopts
Ring controller in parameter reference signal is sent into after the voltage signal of collection energy storage device, interior ring controller passes through PWM generator to DC/
DC changer carries out electric current regulation.
In described motor side, ring controller output reference signal is to the outer ring controller of motor side.
Described grid-connected interior ring controller gathers the current information of AC network.
The current information of described interior ring controller Real-time Collection energy storage device.
A kind of grid connected structure for compressed-air energy-storage system, owing to using above-mentioned structure, this utility model guarantees
Compressed-air energy-storage system part throttle characteristics when energy storage is stable, and conversion efficiency is high, and when electrical network is in load valley, it is achieved electricity
The large scale storage of energy.
Accompanying drawing explanation
With detailed description of the invention, this utility model is described in further detail below in conjunction with the accompanying drawings；
Fig. 1 is the connection diagram of a kind of grid connected structure for compressed-air energy-storage system of this utility model；
Fig. 2 is a kind of connection of motor side current transformer in the grid connected structure of compressed-air energy-storage system of this utility model
Schematic diagram；
Fig. 3 be this utility model a kind of in the grid connected structure of compressed-air energy-storage system the connection of combining inverter show
It is intended to；
Fig. 4 is a kind of connection of DC/DC changer in the grid connected structure of compressed-air energy-storage system of this utility model
Schematic diagram；
In figures 1-4,1, motor side current transformer；2, DC/DC changer；3, combining inverter；4, energy storage device；5, exchange
Electrical network；6, the outer ring controller of motor side；7, ring controller in motor side；8, motor side PWM generator；9, grid-connected outer shroud controls
Device；10, grid-connected interior ring controller；11, grid-connected PWM generator；12, outer ring controller；13, interior ring controller；14, PWM occurs
Device；15, voltage power computing unit.
Detailed description of the invention
AC type compressed-air energy-storage system mainly includes compressed-air energy-storage system and flywheel energy storage system.Both is stored up
System can be required to couple with motor, in power system is applied, use alternating current generator more, therefore, both energy-storage systems are returned
For AC type energy-storage system.The structure of the distributed energy storage system of AC type has similarity, is all to be inhaled by alternating current generator
Receive or send power；In system, general employing high-revolving permagnetic synchronous motor, induction machine etc., need the alternating current of high frequency
After rectification and inversion, the alternating current becoming power frequency is grid-connected.
Due to AC type energy-storage system, the general motor with high speed couples, thus need rectified by power electronic equipment and
After inversion grid-connected, typical case's grid connected structure is made up of motor side current transformer and combining inverter, simultaneously at motor side current transformer and also
Net inverter adds a DC/DC changer, and Main Function is to boost motor side current transformer direct current exit potential.
Concrete the most as Figure 1-4, this utility model include the electric energy of energy storage device 4 pass sequentially through motor side current transformer 1,
DC/DC changer 2, combining inverter 3 are linked in AC network 5, it is characterised in that: described grid connected structure is provided with motor side
Ring controller 7 He in motor side is passed sequentially through after the status information of outer ring controller 6 motor in real time and motor side current transformer 1
The motor speed of motor side current transformer 1, DC voltage, set end voltage are controlled by motor side PWM generator 8；Described
Grid connected structure is provided with the voltage of voltage power computing unit 15 Real-time Collection AC network 5 and power and is transported to grid-connected outer shroud control
Device 9 processed produces reference signal to grid-connected interior ring controller 10, grid-connected interior ring controller 10 by grid-connected PWM generator 11 to grid-connected
Inverter 3 carries out electric current regulation；Described grid connected structure is provided with after outer ring controller 12 gathers the voltage signal of energy storage device 4 joins
Number reference signal sends into interior ring controller 13, and interior ring controller 13 carries out electric current by PWM generator 14 to DC/DC changer 2
Regulation.
In motor side, ring controller 7 exports reference signal to the outer ring controller 6 of motor side.Grid-connected interior ring controller 10 gathers
The current information of AC network 5.The current information of interior ring controller 13 Real-time Collection energy storage device 4.
Motor is mainly controlled by the control system of motor side current transformer 1, many employings in compressed-air energy-storage system
Permagnetic synchronous motor, and only need to consider control when discharging.All in all, the motor no matter used in AC type energy-storage system is
What type, is in which kind of mode of operation, and its motor side current transformer 1 all can use double-loop control structure.According to different control mesh
Mark, the electric parameters such as motor speed, DC voltage, set end voltage can be controlled, and obtain electricity by the outer ring controller 6 of motor side
The reference signal of ring controller 7 in pusher side；Internal ring typically uses PI controller to control current of electric, and produces the modulation of current transformer
Signal.
Combining inverter 3 has polytype, according to the character of DC side power supply, can be divided into voltage source inverter and electricity
Flow pattern inverter；According to the number of phases of output voltage, single-phase inverter, three-phase inverter and polyphase inverter can be divided into；It addition,
Also can by its output-voltage levels number, voltage waveform type, frequency, whether have isolation etc. to classify.The control of combining inverter 3
Structure processed uses double-loop control structure, and the most grid-connected outer ring controller 9 is mainly used in embodying the different purpose that controls, generation internal ring
Current reference signal, dynamic response is slower；Grid-connected interior ring controller 10 is substantially carried out electric current fine, quick regulation, dynamically rings
Should be very fast.
During energy-storage system application scenarios difference, its combining inverter 3 need to take different control strategies, and control strategy is not
Control with the outer shroud being mainly reflected in inverter.The outer loop control method of common energy storage combining inverter has: power limitation control
(PQ control), constant voltage constant frequency control (V/f control), droop control (Droop control).The major function of power limitation control be make inverse
Meritorious and the reactive power of change device output follows value and power reference, its essence is difference after active power and reactive power being decoupled
It is controlled.The function that constant voltage constant frequency controls is the power by adjusting inverter output, makes the alternating current at inverter outlet
Pressure amplitude value and frequency remain unchanged, and are generally used for the situation of micro-capacitance sensor independent operating.Droop control is simulation generator set " merit frequency
Static characteristic " a kind of control method, make use of injection the active power of AC network, reactive power respectively with voltage phase angle, width
Being worth linear principle, droop control has two kinds of basic methods: control output by regulation electric voltage frequency and amplitude
Power；The power control voltage frequency exported by regulation and amplitude.
Comparing inverter, what DC/DC changer 2 related in controlling is DC quantity, is not related to coordinate transform, comparatively
Simply.The control of DC/DC changer 2 also more uses twin nuclei, in outer ring controller 12 produces according to no control purpose
The reference signal of ring, interior ring controller 13 carries out quick electric current regulation.
Good power supply characteristic that this utility model has with it and part throttle characteristics, flexible for realizing " source-net-lotus " overall process
Interaction provides sharp weapon.During as load energy storage, it is stable that compressed air carries out part throttle characteristics during energy storage, and conversion efficiency is high, especially
Wind-powered electricity generation, photoelectricity exert oneself big and time electrical network is in load valley, electric energy is carried out large scale storage, is promoting generation of electricity by new energy
Development, avoid abandoning wind, abandon the wastings of resources such as light there is positive effect；And wind-powered electricity generation, photoelectricity without exert oneself and electrical network to be in load high
During peak, quickly response makes up power notch for electrical network, it is provided that continual and steady electric energy, it is ensured that power network safety operation.
Above in conjunction with accompanying drawing, this utility model is exemplarily described, it is clear that this utility model implements and is not subject to
The restriction of aforesaid way, as long as have employed the various improvement that technical solutions of the utility model are carried out, or the most improved direct application
In other occasion, all within protection domain of the present utility model.
Claims (4)
1., for a grid connected structure for compressed-air energy-storage system, the electric energy including energy storage device (4) passes sequentially through motor side
Current transformer (1), DC/DC changer (2), combining inverter (3) are linked in AC network (5), it is characterised in that: described also
Web frame is provided with outside motor side and leads to successively after the status information of ring controller (6) motor in real time and motor side current transformer (1)
Cross ring controller (7) and motor side PWM generator (8) in motor side to the motor speed of motor side current transformer (1), DC side electricity
Pressure, set end voltage are controlled；Described grid connected structure is provided with voltage power computing unit (15) Real-time Collection AC network (5)
Voltage and power be transported to grid-connected outer ring controller (9) and produce reference signal to grid-connected interior ring controller (10), grid-connected interior
Ring controller (10) carries out electric current regulation by grid-connected PWM generator (11) to combining inverter (3)；Described grid connected structure sets
Ring controller (13) in parameter reference signal is sent into after having outer ring controller (12) to gather the voltage signal of energy storage device (4), interior
Ring controller (13) carries out electric current regulation by PWM generator (14) to DC/DC changer (2).
A kind of grid connected structure for compressed-air energy-storage system the most according to claim 1, it is characterised in that: described
In motor side, ring controller (7) output reference signal is to the outer ring controller (6) of motor side.
A kind of grid connected structure for compressed-air energy-storage system the most according to claim 1, it is characterised in that: described
Grid-connected interior ring controller (10) gathers the current information of AC network (5).
A kind of grid connected structure for compressed-air energy-storage system the most according to claim 1, it is characterised in that: described
The current information of interior ring controller (13) Real-time Collection energy storage device (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620447108.XU CN205595802U (en) | 2016-05-17 | 2016-05-17 | A and web frame for compressed air energy storage system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620447108.XU CN205595802U (en) | 2016-05-17 | 2016-05-17 | A and web frame for compressed air energy storage system |
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| Publication Number | Publication Date |
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| CN205595802U true CN205595802U (en) | 2016-09-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105762822A (en) * | 2016-05-17 | 2016-07-13 | 国网安徽省电力公司芜湖供电公司 | Grid-connected structure of compressed air energy storage system |
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- 2016-05-17 CN CN201620447108.XU patent/CN205595802U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105762822A (en) * | 2016-05-17 | 2016-07-13 | 国网安徽省电力公司芜湖供电公司 | Grid-connected structure of compressed air energy storage system |
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