CN104481815A - Compressed air energy accumulation and release-integrated wind power generation system - Google Patents
Compressed air energy accumulation and release-integrated wind power generation system Download PDFInfo
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- CN104481815A CN104481815A CN201410778970.4A CN201410778970A CN104481815A CN 104481815 A CN104481815 A CN 104481815A CN 201410778970 A CN201410778970 A CN 201410778970A CN 104481815 A CN104481815 A CN 104481815A
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- 238000010248 power generation Methods 0.000 title claims abstract description 12
- 238000009825 accumulation Methods 0.000 title abstract 3
- 238000003860 storage Methods 0.000 claims abstract description 16
- 150000001875 compounds Chemical class 0.000 claims abstract description 8
- 238000004146 energy storage Methods 0.000 claims description 50
- 238000006243 chemical reaction Methods 0.000 claims description 30
- 230000005611 electricity Effects 0.000 claims description 13
- 230000010354 integration Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 12
- 230000006835 compression Effects 0.000 claims description 11
- 239000003990 capacitor Substances 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 230000008961 swelling Effects 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- 230000009347 mechanical transmission Effects 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 2
- 230000035939 shock Effects 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 38
- 230000001105 regulatory effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 244000126968 Kalanchoe pinnata Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/0272—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor by measures acting on the electrical generator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C13/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/028—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling wind motor output power
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/02—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/335—Output power or torque
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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
- Y02E10/72—Wind turbines with rotation axis in wind direction
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a compressed air energy accumulation and release-integrated wind power generation system, which comprises a wind turbine, an electrically controlled clutch, a first motor, a second motor, a vortex compound device and an air storage device; the wind turbine is coaxially connected with the first motor, the first motor is connected with the second motor through the electrically controlled clutch, the second motor is coaxially connected with the vortex compound device, the vortex compound device is connected with the input end of a heat accumulator through an air passage, the output end of the heat accumulator is connected with the air storage device, a first rotational speed and torque sensor is mounted on the connecting shaft between the wind turbine and the first motor, and a second rotational speed and torque sensor is mounted on the connecting shaft between the second motor and the vortex compound device. The structure of the compressed air energy accumulation and release-integrated wind power generation system is compact, and the operation mode is flexible; by coordinately controlling the rotational speed and torque of the two motors and the engagement and disengagement of the clutch, when the vortex compound device is switched in or out, mechanical shock and loss do not exist, and thereby the seamless high-efficiency combination between the compressed air system and the wind power generation system is achieved.
Description
Technical field
The present invention relates to the wind-power generating system of a kind of compressed-air energy storage and release integration.
Background technique
Current wind-power generating system is subject to wind energy wave properties and intermittent restriction, can not long-time continuous stable energy supply, and traditional storage battery, due to expensive, cannot accomplish Large Copacity energy storage.Compressed-air energy storage cost is low, and the life-span is long, does not have the secondary pollution of storage battery, be applicable to being applied in wind power system as Large Copacity energy storage device.
The wind energy conversion system pressurized air of common mechanical formula then more adopts positive drive, many and the complex structure of parts, generally can only produce high-pressure air for release of burning, the power-balance of wind-power generating system can not be regulated as energy storage device, more cannot by system efficiency utilization again.Although adopt wind-force to save power cost, inevitably produce mechanical shock when compressed air plant starts and stops, gear wear increases the weight of, inevitably there is the problems such as strong vibration, noise and lubrication, finally cause running environment poor, difficult in maintenance, short-lived.And mechanically operated system cloud gray model and maintenance.
The problem existing for compressed-air energy storage equipment that present majority can be applied in wind-power generating system has two, and one is the electric energy driving electric machine pressurized air using wind-power electricity generation to produce, and Conversion of Energy link is many, causes energy storage to have loss; Two is adopt the fuel of gas turbine combustion mixed high-voltage air to discharge the air internal energy of storage, although can regulating power supply, but the waste gas of burning and exhausting also have lost a large amount of heat energy except environmental pollution, also need to rely on the auxiliary facility such as gas turbine, natural gas line to be mated simultaneously, complex structure, cost intensive, the inefficiency of energy storage conversion.
Summary of the invention
The present invention is in order to solve the problem, propose the wind-power generating system of a kind of compressed-air energy storage and release integration, this system independently compressed-air energy storage can be released can equipment with mechanical coupling and electric coupling two kinds of mode flexible access wind-power generating systems, can to dissolve the direct pressurized air of wind-force, storage battery is replaced to carry out large-scale energy storage, can directly utilize pressurized air expansion power generation again, release wind energy.The energy equilibrium of supply and demand of effective adjustment wind-power generating system, and energy storage scale is large, and efficiency is high and pollution-free.
To achieve these goals, the present invention adopts following technological scheme:
A wind-power generating system for compressed-air energy storage and release integration, comprises wind energy conversion system, electric control clutch, the first motor, the second motor, vortex complex machine, gas circuit, caisson and PC upper-position unit; Wherein, wind energy conversion system and first motor one end axle connect, and form wind-power electricity generation subtense angle; Second motor and vortex compound arbor connect, and the gas port of vortex complex machine is connected with caisson by gas circuit, form compressed-air energy storage and discharge integrated subtense angle; Described first motor and the second motor shaft are all that two ends are drawn, and the first motor and the second motor are carried out axle and connect by electric control clutch, wind-power electricity generation subtense angle and compressed-air energy storage are discharged integrated subtense angle and combines.
For acquisition system operation information, the coupling shaft of described wind energy conversion system and the first motor is provided with the first torque and speed sensors in order to obtain the torque rotary speed of the first generator; The coupling shaft of described second motor and vortex complex machine is provided with the second torque and speed sensors in order to obtain the torque rotary speed of the second motor.
The first gas-detecting device and the second gas-detecting device described gas circuit be equipped with, comprise pressure transducer, flow transducer and temperature transducer separately, first gas-detecting device is in order to detect the gas pressure of vortex complex machine gas port, flow and temperature, and the second gas-detecting device is in order to detect the gas pressure of caisson, flow and temperature.
Described gas circuit is connected with the first heat exchanger, thermal accumulator, the second heat exchanger, one-way valve and proportional control valve, is divided into two gas circuits; Article one, be compression gas circuit, the pressurized gas that the compression of vortex complex machine produces enter caisson through one-way valve and First Heat Exchanger; Another is expansion gas circuit, and the pressurized gas in caisson enter after vortex complex machine expands through proportional control valve and the second heat exchanger and discharge.
Heat energy is exchanged by thermal accumulator between described First Heat Exchanger and the second heat exchanger.Described vortex complex machine adopts name in Chinese patent application 201110002249 to be called the complex machine in " scroll compression-expansion compound machine for compressed air energy storage technology ", it both can compress low-pressure gas and also can expand to pressurized gas, had been the vitals of compressed-air energy storage and release integration.
Described first motor is connected the first current transformer and the second current transformer respectively with the staor winding of the second motor, is connected between current transformer by DC bus, and current transformer is by respective driver control, and the control signal of driver is changed by PC upper-position unit.
Described DC bus be connected with storage battery, super capacitor and use electrical load.
Working principle of the present invention is:
Wind energy conversion system by wind promotes, and drives the first electric power generation, and electric energy arrives DC bus by the first current transformer.Wind energy conversion system can be subject to wind energy influence of fluctuations thus cause the rotary speed unstabilization of motor fixed, and the voltage and current on DC bus can produce high-frequency fluctuation.Discharge and recharge is carried out to instantaneous fast energy storage device (storage battery and super capacitor) and can fluctuation be stabilized, ensure the stable of DC bus, with this proof load balance and system stable operation.According to current wind speed and fan performance curve, blower fan under this wind speed can be found to reach the optimized rotating speed of maximum power output.By driver control first current transformer, rotating speed and the torque of the first motor can be regulated, change the load of wind energy conversion system, thus follow the tracks of the optimized rotating speed of wind energy conversion system, realize the tracking of the peak output of wind energy conversion system.First torque and speed sensors detects the rotational speed and torque of blower fan output shaft, so that PC upper-position unit carries out closed loop control to the first motor.
When vortex complex machine is operated in compressive state, first High Temperature High Pressure air arrives in heat exchanger along gas circuit, and the refrigerant circulated in pressurized air and thermal accumulator carries out heat exchange, and heat is brought in thermal accumulator and stores.High-pressure air enters caisson storage afterwards.When vortex complex machine is operated in swelling state, the heat energy preheating that the high-pressure air from caisson accepts from thermal accumulator along gas circuit passing ratio Flow valve in heat exchanger, arrives the generating of vortex complex machine expansion work drive motor afterwards.Wherein, thermal accumulator is connected with heat exchanger by pipeline, the gas heat stored can be fed back to gas during expansion, not only reduce the heat-energy losses of compression, also contribute to improving power when expanding, significantly improve the efficiency of compressed-air energy storage during compression.According to the pressure of air in the gas circuit that the first gas-detecting device and the second gas-detecting device record, temperature and flow, can by formula
the working power of estimation vortex complex machine, wherein P
sfor vortex complex machine working power, p
dfor vortex complex machine inlet pressure, Q is vortex complex machine extraction flow, p
sfor vortex complex machine exhaust pressure.Change the rotating speed of vortex complex machine and the aperture of proportional flow control valve according to vortex complex machine working condition, thus control compressed-air energy-storage system can meet power demand in real time, and be operated in the efficiency area of optimization.
When power of fan is greater than loading demand, system comprises two kinds of compressed-air energy storage modes and runs: one is that PC upper-position unit sends instruction, electric control clutch is separated, the electric energy that first motor sends is through converter plant by the second electrical consumption, and the unnecessary electric energy exceeding loading demand drives vortex complex machine compressed-air energy storage; Another kind of mode first drives vortex complex machine raising speed by the second motor with electric model, after the second motor is identical with the first motor speed, PC upper-position unit sends instruction and makes electric control clutch adhesive, by mechanical transmission transferring energy between the second motor and the first motor.
When power of fan is less than loading demand, PC upper-position unit sends instruction makes electric control clutch be separated, and wind energy conversion system drives the first electric power generation, and vortex complex machine drives the second electric power generation, jointly supplies load power demand.Owing to no longer including mechanical transmission between the first motor and the second motor, the running state of the two does not interfere with each other, and regulates motor speed can meet respective optimizing operation state.
The beneficial effect of the invention is:
(1) the present invention adopts compressed air energy storage technology, the vortex complex machine adopted can complete compression and expansion two kinds of mode of operations, the energy flow direction that wind energy conversion system is caught and ratio can freely adjust, the compressed-air energy storage when high wind speed, expand when low wind speed and release energy, efficiently solve wind energy and load unbalanced problem in long time scale.The energy storage device cost simultaneously adopted is low, capacity large, compact structure, efficiency are high, and expands without the need to burning, environmental protection;
(2) present invention achieves the seamless and efficient combination of a kind of compressed-air energy-storage system and wind-power generating system, its structural design is simply compact, and component integration degree is high, and realizability is good, is easy to build and safeguard;
(3) system operating mode of the present invention switches flexibly and does not interfere with each other: by adhesive or the separation of solenoidoperated cluthes, vortex complex machine can be cut out, and changes mode of operation.The rotational speed and torque simultaneously coordinating two motors controls blower fan and vortex complex machine, can be operated in independent working area efficiently separately, the two in conjunction with time can mate rotating speed in advance again, eliminate the mechanical shock and loss that combine, system cloud gray model smooth steady;
(4) present invention utilizes the thermodynamic properties of compression heat production and swelling heat absorption, the heat energy of gas in compression process can be taken in thermal accumulator by heat exchanger and store, being recovered utilization when expanding, reducing heat-energy losses, accomplishing that energy efficient utilizes.Both improve system stored energy efficiency, turn improve expansion power generation power efficiency.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Wherein: 1. wind energy conversion system; 2. the first current transformer; 3. storage battery; 4. super capacitor; 5. the second current transformer; 6. the first torque and speed sensors; 7. proportional flow control valve; 8. the first motor; 9. electric control clutch; 10. the first heat exchanger; 11. second motors; 12. second torque and speed sensorses; 13. vortex complex machines; 14. caissons; 15. second gas-detecting devices; 16. second heat exchangers; 17. thermal accumulator; 18. one-way valves; 19. first gas-detecting devices; 20. gas circuits.
Fig. 2 is Systematical control block diagram.
Embodiment:
Below in conjunction with accompanying drawing and embodiment, the invention will be further described.
As shown in Figure 1, a kind of in conjunction with compressed-air energy storage and the wind-power generating system discharging integration.Comprise wind energy conversion system 1, first motor 8, second motor 11, electric control clutch 9, vortex complex machine 13, gas circuit 20, heat-stored device 17, caisson 14, storage battery 3, super capacitor 4.
Wherein wind energy conversion system 1 axle is connected with the first motor 8, in the middle of axle, the first torque and speed sensors 6 is housed.Vortex complex machine 13 is connected with the second motor 11, in the middle of axle, the second torque and speed sensors 12 is housed.Can be completed by electric control clutch 9 between first motor 8 and the second motor 11 and be separated or connect.
Described first motor 8 staor winding is connected to the first current transformer 2, second motor stator winding and is connected to the drived control instruction of the second current transformer 5, first current transformer 2 and the second current transformer 5 from PC upper-position unit.DC bus between first current transformer 2 and the second current transformer 5 be mounted with instantaneous fast energy storage device (storage battery 3 and super capacitor 4) and use electrical load.
The gas produced when described vortex complex machine 13 compresses by gas circuit 20, respectively through the first gas-detecting device (19, one-way valve 18, heat exchanger 16, second gas-detecting device 15 enter caisson 14.When expanding, gas in caisson 14, by gas circuit 20, arrives vortex complex machine 13 through the second gas-detecting device (comprising pressure, temperature, flow transducer) 15, proportional flow control valve 7, heat exchanger 10, first gas-detecting device (comprising pressure, temperature, flow transducer) 19 respectively.
Described heat exchanger 10 and heat exchanger 16 are connected on same heat-stored device 17 jointly.
System can have multiple-working mode to tackle working conditions change, meets actual motion demand.
Wherein wind energy conversion system 1, first current transformer 2, storage battery 3, super capacitor 4, first torque and speed sensors 6, first motor 8 constitute traditional wind-power electricity generation subtense angle: wind energy conversion system 1 rotates and the first motor 8 can be driven to generate electricity, and electric energy arrives DC bus by the first current transformer 2.When wind energy conversion system is subject to wind energy influence of fluctuations, when the rotating speed of motor is disturbed, the voltage and current on DC bus can produce high-frequency fluctuation.Discharge and recharge is carried out to instantaneous fast energy storage device (storage battery 3 and super capacitor 4) and can fluctuation be stabilized, ensure the stable of DC bus, with this proof load balance and system stable operation.PC upper-position unit executive system control program, sends control command, by the control to the first current transformer 2, regulates rotating speed and the torque of the first motor, and then changes the load of wind energy conversion system, and adjustment wind energy conversion system runs, and completes the tracking of the peak output of wind energy conversion system.The effect of the first torque and speed sensors 6 be detect blower fan output shaft rotational speed and torque as feedback signal so that PC upper-position unit completes the closed loop control to the first motor 8.
Proportional flow control valve 7, first heat exchanger 10, second motor 11, second torque and speed sensors 12, vortex complex machine 13, caisson 14, second gas-detecting device 15, second heat exchanger 16, thermal accumulator 17, one-way valve 18, first gas-detecting device 19 and gas circuit 20; Constitute compressed-air energy storage and discharge integrated subtense angle, system is divided into two kinds of situations according to the different operating state of the compression of vortex complex machine 13 or expansion: when vortex complex machine 13 is operated in compressive state, first High Temperature High Pressure air arrives in heat exchanger 16 along gas circuit 20, heat exchange is carried out with the refrigerant circulated in thermal accumulator 17, heat is brought in thermal accumulator 17, and the high-pressure air of normal temperature enters caisson 14 and stores afterwards; When vortex complex machine 13 is operated in swelling state, from the heat energy preheating that the high-pressure air of caisson 14 accepts from thermal accumulator 17 along gas circuit 20 passing ratio Flow valve 7 in heat exchanger 10, arrive vortex complex machine 13 expansion work afterwards, drive motor 11 generates electricity.Wherein thermal accumulator 17 is connected with 16 with heat exchanger 10 by two circulation loops, not only the gas heat stored during compression can be fed back to expanding gas, reduce the heat-energy losses of compression, also can be equipped with other heat-exchange apparatus and pipeline, be used for producing other purposes such as hot water for life.Expand energy utilization mode significantly, realized cascaded utilization of energy, improve system capacity utilization ratio.The effect of the first gas-detecting device 15 and the second gas-detecting device 19 detects the pressure of air in gas circuit 20, temperature and flow, and reponse system actual working state, for PC upper-position unit determination operating conditions provides foundation.The simultaneously rotating speed of closed loop control vortex complex machine 13 and the aperture of proportional flow control valve 7, thus make compressed-air energy storage discharge integrated subtense angle can real-time working in the efficiency area optimized.
Connect the power system that key structure that wind-power electricity generation subtense angle and compressed-air energy storage discharge integrated subtense angle is the first motor 8, electric control clutch 9, second motor 11 composition.System according to different blower fan working environment and loading demand, can select following multiple-working mode flexibly:
When power of fan just in time meets loading demand, PC upper-position unit sends instruction makes electric control clutch 9 be separated, and the first motor 8 generates electricity, and the second motor 11 stops.Simultaneously according to the feedback signal of wind speed size, fan operation curve and the first torque and speed sensors 6, PC upper-position unit calculates the given control signal of the first current transformer 2, regulates the first motor 8 and fan operation situation, realizes blower fan maximal power tracing.Fluctuation for high-frequency electrical energy can be stabilized by storage battery and super capacitor.
When power of fan is much larger than loading demand, system can two kinds of compressed-air energy storage modes be run: a kind of mode uses electric energy to drive vortex complex machine compressed-air energy storage, first electric control clutch 9 is separated, wind energy conversion system 1 drives the first motor 8 to generate electricity, second motor 11 electronic drive vortex complex machine 13, now the electric energy that sends of the first motor 8 is through the first current transformer 2, DC bus and the second current transformer 5, consumed by the second motor 11, the unnecessary electric energy exceeding loading demand converts compressed-air energy storage to, the principle of PC PC control first motor 8 and the second motor 11 ensures blower fan maximal power tracing, and according to the pressure of air in gas circuit 20, temperature, with parameter and vortex complex machine 13 operation curves such as flows, optimize compressed air efficiency, another kind of mode first drags vortex complex machine 13 by the second motor 11 with electric model to operate, after vortex complex machine 13 is identical with the first motor 8 rotating speed, by electric control clutch 9 adhesive, PC upper-position unit is under the prerequisite that guarantee second motor 11 is identical with the first motor 8 rotating speed, the torque of both cooperation control, makes energy unnecessary on fan shaft be delivered to vortex complex machine 13 in the mode of mechanical energy and carries out compressed-air energy storage.In first kind of way, the mechanical energy of catching of wind energy conversion system 1 needs the medium tache through electric energy to transform when compressed-air energy storage, efficiency incurs loss, but wind energy conversion system 1 and vortex complex machine 13 run and do not interfere with each other, control simple, the efficiency optimization of blower fan maximal power tracing and vortex complex machine 13 can be realized simultaneously.In the second way, the combination of blower fan and scroll machine is ingenious, and mechanical shock is minimum, both eliminated in conjunction with time energy loss, extend component life again, simultaneously excess energy no longer transforms through electric energy link, and energy storage efficiency is higher.
When power of fan is much smaller than loading demand, PC upper-position unit sends instruction makes electric control clutch 9 be separated, and wind energy conversion system 1 drives the first motor 8 to generate electricity, and is regulated the rotating speed of the first motor 8 by the first current transformer 2, follows the tracks of peak output.Meanwhile, by the aperture of control ratio valve 7, make pressurized gas in gas circuit 20 after the first heat exchanger heats, enter vortex complex machine 13 expansion work, drive the second motor 11 to generate electricity, regulated the rotating speed of the second motor 11 by the second current transformer 5, follow the tracks of expansion maximal efficiency.Under this pattern, electric power generation does not interfere with each other supplies load power demand jointly, accomplishes that system effectiveness maximizes.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technological scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Claims (9)
1. a wind-power generating system for compressed-air energy storage and release integration, is characterized in that: comprise wind energy conversion system, electric control clutch, the first motor, the second motor, vortex complex machine, gas circuit, caisson and PC upper-position unit; Wherein, wind energy conversion system and first motor one end axle connect, and form wind-power electricity generation subtense angle; Second motor and vortex compound arbor connect, and the gas port of vortex complex machine is connected with caisson by gas circuit, form compressed-air energy storage and discharge integrated subtense angle; Described first motor and the second motor shaft are all that two ends are drawn, and the first motor and the second motor are carried out axle and connect by electric control clutch, wind-power electricity generation subtense angle and compressed-air energy storage are discharged integrated subtense angle and combines.
2. the wind-power generating system of compressed-air energy storage as claimed in claim 1 and release integration, is characterized in that: the coupling shaft of described wind energy conversion system and the first motor is provided with the first torque and speed sensors in order to obtain the torque rotary speed of the first generator; The coupling shaft of described second motor and vortex complex machine is provided with the second torque and speed sensors in order to obtain the torque rotary speed of the second motor.
3. the wind-power generating system of compressed-air energy storage as claimed in claim 1 and release integration, it is characterized in that: described gas circuit is equipped with the first gas-detecting device and the second gas-detecting device, comprise pressure transducer, flow transducer and temperature transducer separately, first gas-detecting device is in order to detect the gas pressure of vortex complex machine gas port, flow and temperature, and the second gas-detecting device is in order to detect the gas pressure of caisson, flow and temperature.
4. the wind-power generating system of compressed-air energy storage as claimed in claim 1 and release integration, is characterized in that: described gas circuit is connected with the first heat exchanger, thermal accumulator, the second heat exchanger, one-way valve and proportional control valve, is divided into two gas circuits; Article one, be compression gas circuit, the pressurized gas that the compression of vortex complex machine produces enter caisson through one-way valve and First Heat Exchanger; Another is expansion gas circuit, and the pressurized gas in caisson enter after vortex complex machine expands through proportional control valve and the second heat exchanger and discharge.
5. the wind-power generating system of compressed-air energy storage as claimed in claim 1 and release integration, it is characterized in that: described first motor is connected the first current transformer and the second current transformer respectively with the staor winding of the second motor, connected by DC bus between current transformer, current transformer is by respective driver control, and the control signal of driver is changed by PC upper-position unit.
6. the wind-power generating system of compressed-air energy storage as claimed in claim 5 and release integration, is characterized in that: described DC bus be connected with storage battery, super capacitor and use electrical load.
7. the controlling method of the wind-power generating system according to any one of claim 1-6, is characterized in that: comprise the following steps:
(1) when vortex complex machine is operated in compressive state, first High Temperature High Pressure air arrives in heat exchanger along gas circuit, and the refrigerant circulated in pressurized air and thermal accumulator carries out heat exchange, and heat is brought in thermal accumulator and stores; High-pressure air enters caisson and stores;
(2) when vortex complex machine is operated in swelling state, the heat energy preheating that the high-pressure air from caisson accepts from thermal accumulator along gas circuit passing ratio Flow valve in heat exchanger, arrives the generating of vortex complex machine expansion work drive motor afterwards;
(3) pressure of air, temperature and flow in the gas circuit recorded according to the first gas-detecting device and the second gas-detecting device, the working power of estimation vortex complex machine, changes the rotating speed of vortex complex machine and the aperture of proportional flow control valve according to vortex complex machine working condition;
(4) when power of fan is greater than loading demand, system is run in compressed-air energy storage mode; When power of fan is less than loading demand, PC upper-position unit sends instruction makes electric control clutch be separated, and wind energy conversion system drives the first electric power generation, and vortex complex machine drives the second electric power generation, jointly supplies load power demand.
8. controlling method as claimed in claim 7, is characterized in that: in described step (3), its concrete grammar is:
According to the pressure of air in the gas circuit that the first gas-detecting device and the second gas-detecting device record, temperature and flow, can by formula
the working power of estimation vortex complex machine, wherein P
sfor vortex complex machine working power, p
dfor vortex complex machine inlet pressure, Q is vortex complex machine extraction flow, p
sfor vortex complex machine exhaust pressure.
9. controlling method as claimed in claim 7, it is characterized in that: in described step (4), when power of fan is greater than loading demand, system comprises two kinds of compressed-air energy storage modes and runs: one is that PC upper-position unit sends instruction, electric control clutch is separated, the electric energy that first motor sends is through converter plant by the second electrical consumption, and the unnecessary electric energy exceeding loading demand drives vortex complex machine compressed-air energy storage; Another kind of mode first drives vortex complex machine raising speed by the second motor with electric model, after the second motor is identical with the first motor speed, PC upper-position unit sends instruction and makes electric control clutch adhesive, by mechanical transmission transferring energy between the second motor and the first motor.
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