CN105680462A - Energy storage and power generation system and power load peak operation control method - Google Patents
Energy storage and power generation system and power load peak operation control method Download PDFInfo
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- CN105680462A CN105680462A CN201610155690.7A CN201610155690A CN105680462A CN 105680462 A CN105680462 A CN 105680462A CN 201610155690 A CN201610155690 A CN 201610155690A CN 105680462 A CN105680462 A CN 105680462A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/02—Controlling, e.g. stopping or starting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
- F01K3/12—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having two or more accumulators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J15/00—Systems for storing electric energy
-
- 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
Abstract
The invention provides an energy storage and power generation system and a power load peak operation control method. A flexible container and a rigid container of an air energy storage device are communicated with a high-voltage expansion machine and a low-voltage expansion machine respectively; when power generation is carried out at a load peak, compressed air in the rigid container can still be released even if the volume of the flexible container is smaller than a volume threshold; and furthermore, the problem that the pressure requirements of the high-voltage expansion machine cannot be met due to the fact that the rigid container releases air at variable pressure is solved through power generation of the low-voltage expansion machine.
Description
Technical field
The present invention relates to the energy-storing and power-generating system of a kind of pressurized air and and progress control method, it can be used in electrical network Load Regulation.
Background technology
Micro-capacitance sensor plays one of the most effective mode of distributed power generation usefulness. Power energy storage equipment, as part indispensable in micro-capacitance sensor, plays most important effect. Deposited fault offset, by certain media storage electric energy, is generated electricity by electric energy storing system when needed. Electric energy storing system is applied in electrical network, both can be regulated by electrical network load, thus greatly promotes power supply quality, as emergency source of electric power, can meet the needs of daily production, life again simultaneously. Development electric energy storing system is the urgent needs that renewable energy source utilizes on a large scale, is also the effective way improving conventional electric power system efficiency, security and economy, simultaneously or the gordian technique of intelligent grid and distributed energy resource system.
Oneself has power energy storage technology to comprise at present: physics energy storage (as energy storage of drawing water, compressed-air energy storage, flywheel energy storage), electrochemical energy storage (secondary cell, flow battery), chemical energy storage (Hydrogen Energy, synthetic natural gas), power energy storage (such as superconducting coil energy storage, ultracapacitor energy storage) and hot energy storage (melting salt energy storage, aobvious hot energy storage) etc. But due to reasons such as capacity, energy storage cycle, energy density, efficiency for charge-discharge, life-span, working cost, environmental protection, oneself only draws water power station and pressurized air two kinds at the main accumulator system run so far.
Compressed air energy storage power generating system has that stored energy capacitance is big, energy storage cycle length, life-span length and the advantage such as investment is relatively little, as a kind of technology maturation, feasible energy storage mode, is with a wide range of applications in fields such as the production of electric power, transport and consumption. Specifically comprising of compressed-air energy-storage system: (1) peak load shifting (2) balancing electric power load compression (3) demand side electrical management (4) is applied to renewable energy source (5) standby power supply power station.
Compressed air energy storage power generating system is primarily of air compressor, accumulator unit, decompressor and other auxiliary and Controlling System compositions. When pressurized air generates electricity, mode of operation mainly contains two kinds, and one is transformation, and when generating electricity, air pressure can change; Another kind is constant voltage, and it is mainly by keeping pressure-stabilisation, thus reduces storage volume, guarantees power station Effec-tive Function.
In prior art, the patent of invention of 201110165606 proposes a kind of constant voltage compressed air energy storage power generating system, its by low power consumption by pneumatic plant by air press-in flexible accumulator unit under water, thus electric energy is converted in air and can store; In peak of power consumption, accumulator unit mesohigh air drives generator generating by decompressor after interchanger absorbs heat; Utilize pressure under water to make the inner constant voltage of accumulator unit, thus realize the constant-pressure operation of system. But, also there is following shortcoming in the invention of the prior art, its accumulator unit is fixed on specific position in river, river, lake, reservoir or artificial pond, and wherein the water level in natural water source or reservoir along with the impact change in season and environment, can cause the pressure of accumulator unit to change; The volume in artificial pond is fixed, although its water yield can be controlled, but accumulator unit expand and shrink process in, rising or the reduction of water level can be caused, the pressure of accumulator unit also can be caused to change; In addition, the expanding volume of flexible apparatus is limited, after the volume of gas injection reaches certain limit, then continues to pour the damage that may cause container.
As the improvement of 201110165606, contriver's earlier application proposes the energy-storing and power-generating system that a kind of intelligence micro-grid load regulates, when reaching its threshold value by the store power energy of the flexible cell in water source, by unnecessary electric power stored energy in the 2nd storage receptacle of rigidity, and when load crest, by the control for storage receptacle, the pressurized air of rigid container also can be generated electricity by constant voltage.But, in this earlier application, power generation system, when crest generates electricity, due to the minimal compression finite volume of flexible cell, when within it gas is less than its minimal compression volume, cannot continue to provide pressurized air, and generating terminates; But now still existing in rigid container and equal the pressurized air of water source pressure, it also just cannot generate electricity, thus cause cannot abundant compressed air energy. As the technical scheme improved further, it is proposed that the intelligent grid energy-storing and power-generating system of improvement and electric power load crest progress control method.
Summary of the invention
As an aspect of the present invention, it is provided that a kind of energy-storing and power-generating system, comprising: electric motor, for providing the electric power calmed the anger needed for unit; Calm the anger unit, for air compression being entered accumulator unit when energy storage by electric power; Accumulator unit, for receiving the store compressed air of unit of calming the anger; Accumulator unit is arranged in water source; Expansion unit, when generating electricity, pressurized air enters expansion unit expansion work; Generator, expansion unit drives generator to generate electricity; Described accumulator unit comprises the first accumulator unit and the 2nd accumulator unit; Described first accumulator unit is arranged in pond, and described first accumulator unit is arranged at outside pond; Described first accumulator unit is communicated by variable valve with the 2nd accumulator unit; Described expansion unit comprises high pressure decompressor and inflated with low pressure machine, and described first accumulator unit and the 2nd accumulator unit are respectively by switch-valve and described high pressure decompressor and inflated with low pressure machine; When generating electricity, by controlling the pressure that the control of described switch-valve enters the pressurized air of expansion unit.
Preferably, described pneumatic plant group is connected with described first accumulator unit and the 2nd accumulator unit by the first switch-valve and the 2nd switch-valve respectively; Described first accumulator unit is communicated with described high pressure decompressor by the 3rd switch-valve; Described 2nd accumulator unit is communicated with described high pressure decompressor by the 4th switch-valve.
Preferably, when generating electricity beginning, control device described first switch-valve of control, the 2nd switch-valve, the 4th switch-valve, variable valve are closed, and described 3rd switch-valve is opened.
Preferably, when described first accumulator unit and the 2nd accumulator unit are less than its rated flow by described 3rd switch-valve to the flow that described high pressure decompressor is carried simultaneously, control device cuts out described 3rd switch-valve, opens described 4th switch-valve.
Preferably, the gas inlet at described high pressure decompressor arranges under meter, arranges pressure gage in described 2nd accumulator unit; After generating starts, gas inlet flow described in monitor in real time, when described gas inlet flow is less than flow threshold, described flow threshold is the particular value being less than its rated flow, and when in described 2nd accumulator unit, pressure is greater than pressure in described first accumulator unit, described control device controls described variable valve and opens, and the flow controlling described variable valve equals described rated flow; When pressure in described 2nd accumulator unit equals pressure in the first accumulator unit and described gas inlet flow is less than described flow threshold, close the 3rd switch-valve and described variable valve, open described 4th switch-valve; When in described 2nd accumulator unit, pressure is less than threshold pressure, close described 4th switch-valve.
As another aspect of the present invention, the electric power load crest progress control method of a kind of energy-storing and power-generating system is provided, comprise the steps: 1) when generating electricity beginning, control device described first switch-valve of control, the 2nd switch-valve, the 4th switch-valve, variable valve are closed, described 3rd switch-valve is opened, and described first accumulator unit carries pressurized air to generate electricity to described high pressure decompressor;2) when described first accumulator unit and the 2nd accumulator unit are less than its rated flow by described 3rd switch-valve to the flow that described high pressure decompressor is carried simultaneously, control device cuts out described 3rd switch-valve, opening described 4th switch-valve, described 2nd accumulator unit carries pressurized air to generate electricity to described inflated with low pressure machine.
As another aspect of the present invention, the electric power load crest progress control method of a kind of energy-storing and power-generating system is provided, comprise the steps: 1) when generating electricity beginning, control device described first switch-valve of control, the 2nd switch-valve, the 4th switch-valve, variable valve are closed, described 3rd switch-valve is opened, and described first accumulator unit carries pressurized air to generate electricity to described high pressure decompressor; 2) high pressure expander air inlet flow rate described in monitor in real time, when described gas inlet flow is less than described flow threshold, and when in described 2nd accumulator unit, pressure is greater than pressure in described first accumulator unit, described control device controls described variable valve and opens, and the flow controlling described variable valve equals described rated flow; Described first accumulator unit carries pressurized air to generate electricity by described 3rd switch-valve to described high pressure decompressor together with described 2nd accumulator unit; 3) when pressure in described 2nd accumulator unit equals pressure in the first accumulator unit and described gas inlet flow is less than described flow threshold, close the 3rd switch-valve and described variable valve, open described 4th switch-valve; Described 2nd accumulator unit carries pressurized air to generate electricity to described inflated with low pressure machine; 4) when pressure in described 2nd accumulator unit is less than the threshold pressure of inflated with low pressure machine, described 4th switch-valve is closed.
Accompanying drawing explanation
Fig. 1 is the system architecture figure of embodiment of the present invention energy-storing and power-generating system.
Embodiment
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, it is briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
See Fig. 1, the embodiment of the energy-storing and power-generating system of the embodiment of the present invention, comprises electric motor 1, unit 2 of calming the anger, water source 3, first accumulator unit 4, the 2nd accumulator unit 5, high pressure decompressor 61, inflated with low pressure machine 62 and generator 7. The electric power that electric motor 1 is calmed the anger needed for unit 2 for providing, at low power consumption, electric motor 1 obtains the electric power of surplus by being used for pressurized air. Calming the anger unit 2, for air compression being entered accumulator unit when energy storage by electric power, air boosts intensification in pneumatic plant, enters accumulator unit.
Water source 3 is artificial pond, has specific volume, and it is set to the shape that section area increases along with the rising of height. Accumulator unit comprises the first accumulator unit 4 and the 2nd accumulator unit 5. Wherein, the first accumulator unit 4 is flexible cell, and it is inner that it is arranged on water source 3, is fixed on certain height below water source 3 by stationary installation. Preferably, it is possible to be set to by the first accumulator unit 4, when expanding volume is maximum, the area of the pond cross section of its place, summit height is less than the half of water source 3 topside area. By such setting, even if when the volume change of flexible cell causes the height change at water source, owing to the sectional area at top, water source is relatively big, thus the change of its relative height is less, thus reduces the impact of water source height change for atmospheric pressure in flexible cell.2nd accumulator unit 5 is rigid container, and it is outside that it is arranged on water source 3, is communicated with the first accumulator unit 4 by variable valve 8.
Unit 2 of calming the anger is communicated with the first accumulator unit 4 and the 2nd accumulator unit 5 by first channel 9 and second passage 10 respectively. First channel 9 is arranged the first switch-valve 11, second passage 10 arrange the 2nd switch-valve 12. First accumulator unit 4 is communicated with high pressure decompressor 61 by third channel 13, third channel 13 arranges the 3rd switch-valve the 14, two accumulator unit 5 and is communicated with inflated with low pressure machine 62 by four-way 15, four-way 15 arranges the 4th switch-valve 16. Expansion unit is used for when generating electricity, and pressurized air enters expansion unit expansion work, and the air that its mesohigh decompressor 61 exports enters inflated with low pressure machine 62, thus proceeds generating. Third channel 13 can arrange interchanger, after being heated by pressurized air, enter high pressure decompressor 61. Meanwhile, interchanger is set between high pressure decompressor 61 and the first decompressor 62. Generator 7, when peak of power consumption, expansion unit drives generator to generate electricity, it is provided that to power system.
Control device, when low power consumption energy storage, it controls the first switch-valve 11 and the 2nd switch-valve 12 is opened when energy storage starts, and closes the 3rd switch-valve 14 and the 4th switch-valve 16, calm the anger unit 2 simultaneously by compressed air delivery to the first accumulator unit 4 and the 2nd accumulator unit 5. When in the first accumulator unit 4, gas volume is greater than gas volume required when it reaches maximum volume, now, the energy storage of the first accumulator unit 4 reaches maximum value, and control device controls the first switch-valve 11 and cuts out and variable valve 8 cuts out; Thus, pressurized air is only stored into the 2nd accumulator unit 5 by unit 2 of calming the anger. At the end of energy storage, control device the 2nd switch-valve 12 and variable valve 8 are closed.
Gas inlet at high pressure decompressor 61 arranges under meter, arranges pressure gage in the 2nd accumulator unit 5. When peak of power consumption generating starts, control device controls the first switch-valve 11, the 2nd switch-valve 12, the 4th switch-valve 16, variable valve 8 are closed, and the 3rd switch-valve 14 is opened, and the first accumulator unit 4 carries pressurized air to generate electricity to high pressure decompressor 61. Gas inlet at high pressure decompressor 61 arranges under meter, arranges pressure gage in the 2nd accumulator unit 5. Carry out in process in generating, monitor in real time gas inlet flow, when gas inlet flow is less than flow threshold, this flow threshold is the particular value being less than high pressure decompressor 61 rated flow, and when in the 2nd accumulator unit 5, pressure is greater than pressure in the first accumulator unit 4, control device regulating and controlling valve 8 is opened, and the flow of regulating and controlling valve 8 equals described rated flow. When the volume of the first accumulator unit 4 is less than its threshold volume, now in the 2nd accumulator unit 5 pressure equal pressure in the first accumulator unit 4 and when high pressure decompressor 61 gas inlet flow is less than flow threshold, represent that the compressed air energy in the first accumulator unit 4 is not enough, but now still there is the air equaling source pressure in the 2nd accumulator unit 5, close the 3rd switch-valve 14 and variable valve 8, open the 4th switch-valve 16, carry pressurized air to generate electricity by the 2nd accumulator unit 5 to inflated with low pressure machine 62; When in the 2nd accumulator unit 5, pressure is less than the threshold pressure of inflated with low pressure machine, close the 4th switch-valve 16, generating end of processing.
The electric power load crest progress control method of energy-storing and power-generating system of the present invention, comprise the steps: 1) when generating electricity beginning, control device described first switch-valve 11 of control, the 2nd switch-valve 12, the 4th switch-valve 16, variable valve close 8,3rd switch-valve 14 is opened, and the first accumulator unit 4 carries pressurized air to generate electricity to high pressure decompressor 61;2) monitor in real time high pressure decompressor 61 gas inlet flow, when gas inlet instantaneous delivery is less than flow threshold, and when in the 2nd accumulator unit 5, pressure is greater than pressure in the first accumulator unit 4, control device regulating and controlling valve 8 is opened, and the flow of regulating and controlling valve 8 equals rated flow; First accumulator unit 4 carries pressurized air to generate electricity by the 3rd switch-valve 14 to high pressure decompressor 61 together with the 2nd accumulator unit 5; 3) when pressure in the 2nd accumulator unit 5 equals pressure in the first accumulator unit and high pressure decompressor 61 gas inlet flow is less than flow threshold, close the 3rd switch-valve 14 and variable valve 8, open the 4th switch-valve 16; 2nd accumulator unit 4 carries pressurized air to generate electricity to inflated with low pressure machine 62; 4) when pressure in the 2nd accumulator unit 4 is less than the threshold pressure of inflated with low pressure machine, the 4th switch-valve is closed.
By the above-mentioned setting of the present invention, when generating electricity at load crest, even if the volume of flexible cell is less than its volume threshold, still can by the pressurized air in rigid container by discharging, further, generated electricity by inflated with low pressure machine, avoid rigid container transformation release air and cause the problem that can not meet high pressure decompressor pressure demand.
Below being only the preferred embodiment of the present invention, protection scope of the present invention is also not only confined to above-described embodiment, and all technical schemes belonged under thinking of the present invention all belong to protection scope of the present invention. For those skilled in the art, some improvements and modifications without departing from the principles of the present invention, should be considered as falling into protection scope of the present invention.
Claims (6)
1. an energy-storing and power-generating system, comprising: electric motor, for providing the electric power calmed the anger needed for unit; Calm the anger unit, for air compression being entered accumulator unit when energy storage by electric power; Accumulator unit, for receiving the store compressed air of unit of calming the anger; Accumulator unit is arranged in water source; Expansion unit, when generating electricity, pressurized air enters expansion unit expansion work; Generator, expansion unit drives generator to generate electricity; It is characterized in that: described accumulator unit comprises the first accumulator unit and the 2nd accumulator unit; Described first accumulator unit is arranged in pond, and described first accumulator unit is arranged at outside pond; Described first accumulator unit is communicated by variable valve with the 2nd accumulator unit; Described expansion unit comprises high pressure decompressor and inflated with low pressure machine, and described first accumulator unit and the 2nd accumulator unit are respectively by switch-valve and described high pressure decompressor and inflated with low pressure machine; When generating electricity, by controlling the pressure that the control of described switch-valve enters the pressurized air of expansion unit.
2. energy-storing and power-generating system according to claim 1, it is characterised in that: described pneumatic plant group is connected with described first accumulator unit and the 2nd accumulator unit by the first switch-valve and the 2nd switch-valve respectively; Described first accumulator unit is communicated with described high pressure decompressor by the 3rd switch-valve; Described 2nd accumulator unit is communicated with described high pressure decompressor by the 4th switch-valve.
3. energy-storing and power-generating system according to claim 2, it is characterised in that: when generating electricity beginning, control device described first switch-valve of control, the 2nd switch-valve, the 4th switch-valve, variable valve are closed, and described 3rd switch-valve is opened.
4. energy-storing and power-generating system according to claim 3, it is characterized in that: when described first accumulator unit and the 2nd accumulator unit are less than its rated flow by described 3rd switch-valve to the flow that described high pressure decompressor is carried simultaneously, control device cuts out described 3rd switch-valve, opens described 4th switch-valve.
5. the electric power load crest progress control method of an energy-storing and power-generating system, comprise the steps: 1) when generating electricity beginning, control device described first switch-valve of control, the 2nd switch-valve, the 4th switch-valve, variable valve are closed, described 3rd switch-valve is opened, and described first accumulator unit carries pressurized air to generate electricity to described high pressure decompressor; 2) when described first accumulator unit and the 2nd accumulator unit are less than its rated flow by described 3rd switch-valve to the flow that described high pressure decompressor is carried simultaneously, control device cuts out described 3rd switch-valve, opening described 4th switch-valve, described 2nd accumulator unit carries pressurized air to generate electricity to described inflated with low pressure machine.
6. the electric power load crest progress control method of an energy-storing and power-generating system, comprise the steps: 1) when generating electricity beginning, control device described first switch-valve of control, the 2nd switch-valve, the 4th switch-valve, variable valve are closed, described 3rd switch-valve is opened, and described first accumulator unit carries pressurized air to generate electricity to described high pressure decompressor; 2) high pressure expander air inlet flow rate described in monitor in real time, when described gas inlet flow is less than described flow threshold, and when in described 2nd accumulator unit, pressure is greater than pressure in described first accumulator unit, described control device controls described variable valve and opens, and the flow controlling described variable valve equals described rated flow; Described first accumulator unit carries pressurized air to generate electricity by described 3rd switch-valve to described high pressure decompressor together with described 2nd accumulator unit; 3) when pressure in described 2nd accumulator unit equals pressure in the first accumulator unit and described gas inlet flow is less than described flow threshold, close the 3rd switch-valve and described variable valve, open described 4th switch-valve; Described 2nd accumulator unit carries pressurized air to generate electricity to described inflated with low pressure machine; 4) when pressure in described 2nd accumulator unit is less than the threshold pressure of inflated with low pressure machine, described 4th switch-valve is closed.
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| CN201610155690.7A CN105680462B (en) | 2016-03-19 | 2016-03-19 | Energy-storing and power-generating system and electric load wave crest progress control method |
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| CN201610155690.7A CN105680462B (en) | 2016-03-19 | 2016-03-19 | Energy-storing and power-generating system and electric load wave crest progress control method |
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| CN110274150A (en) * | 2019-06-05 | 2019-09-24 | 许未晴 | A kind of pressure-air storage device and its method for compressed-air energy storage |
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| CN105680462B (en) | 2018-07-06 |
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