CN118601799A - Novel pressure storage system and gas storage device based on wind storage and transportation - Google Patents
Novel pressure storage system and gas storage device based on wind storage and transportation Download PDFInfo
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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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Abstract
The embodiment of the invention relates to a novel pressurized storage system and a novel gas storage device based on wind storage and transportation, comprising a wind generating set, a compressor set, an expansion set, an on-site load tower and a central load tower. Compared with the mode that a vertical shaft is required to be excavated downwards from the ground, and a sealing layer, lining, surrounding rock and the like are arranged at the bottom of the vertical shaft to form a gas storage, the novel pressurized gas storage system and the gas storage device based on wind gas storage, which are disclosed by the embodiment of the invention, realize compressed storage of gas by arranging the mountain transverse gas storage on a mountain, so that the whole mountain transverse gas storage is simple in structure and simple and convenient to construct. In addition, the novel pressure storage system and the novel gas storage device based on wind storage and transportation are arranged, the compressor unit comprises the centrifugal compressor and the axial flow compressor, the expansion unit comprises the high-pressure expansion machine and the low-pressure expansion machine, and the high-pressure expansion machine and the centrifugal compressor are provided with the shared heat exchanger, so that high-efficiency large-flow, low-pressure loss and compact arrangement can be realized.
Description
Technical Field
The embodiment of the invention relates to the technical field of wind power energy storage, in particular to a novel pressure storage system and a novel gas storage device based on wind power storage and transportation.
Background
The offshore wind can be used as new energy to realize the utilization of renewable energy. Specifically, wind can be converted into wind power by a wind generating set. The generating capacity of the offshore wind turbine generator is related to different wind conditions (stable wind conditions, gust wind conditions, gradual change wind conditions and the like), and the electricity consumption peak value is high and peak-valley load difference fluctuation is large in coastal economy developed areas, so that energy storage construction is frequently required along the offshore wind power plant, and the offshore wind power generation capacity and the grid-connected regulation capacity are improved. At present, a gas storage device can be adopted to convert electric energy into gas pressure potential energy and gas thermal energy internal energy for storage. The cost of the gas storage device of the conventional pressurized storage system is higher than the total cost of the system, the cost of natural salt caves, oil and gas reservoirs, abandoned roadways (flexible airtight polymer films are laid on the inner walls), and the like are low, but are limited by geographical conditions, the relative cost of artificial lining (steel sheet/glass fiber reinforced plastic/concrete lining or rigid-flexible composite sealing layer filled with bentonite) caves and concrete gas storage chambers is higher (but the quality of the artificial steel lining is better than that of the natural salt caves/hard rock caves), and the cost of pipeline steel, metal storage tanks, thermoplastic pipes, composite material tanks, underwater rigid storage tanks, flexible air bags, and the like on the ground is highest, and the industrial pipeline steel, salt caves and artificial caves are used in the market at present.
The existing artificial chambers are mostly buried in 300 meters (the salt cavern gas storage can reach 1000 meters) in the ground, and comprise construction/permanent shafts, connecting roadways, gas storage engineering, safety channels and the like, the structure is composed of airtight sealing layers, lining and surrounding rocks, the diameter is generally smaller than 30 meters, the manufacturing cost is 5000-6000 yuan per square meter (the manufacturing cost of pipeline steel is about 10000 yuan per square meter), and the artificial chambers are relatively more suitable for low-cost large-scale popularization, especially under the condition without natural gas storage. The construction of the vertical shaft is carried out by digging downwards from the ground, then the bottom of the vertical shaft is dug again to form an air chamber communicated with the vertical shaft, and the inner wall of the air chamber is constructed to form a sealing layer, a lining, surrounding rock and the like, so that the structure of the whole artificial chamber is complex, and the construction operation is not easy.
Disclosure of Invention
In order to solve the technical problems or at least partially solve the technical problems, the embodiment of the invention provides a novel pressure storage system and a novel gas storage device based on wind storage and transportation.
The embodiment of the invention provides a novel pressure storage system and a novel gas storage device based on wind storage and transportation, wherein the novel pressure storage system and the gas storage device comprise a wind generating set, a compressor set, an expansion set, an on-site load tower and a central load tower;
the wind generating set is arranged on the sea surface, the local load tower is positioned on the coast of the sea surface, and the central load tower is positioned on land;
The compressor unit at least comprises an axial flow compressor and a centrifugal compressor connected with the axial flow compressor, the expansion unit at least comprises a high-pressure expansion machine and a low-pressure expansion machine connected with the high-pressure expansion machine, and a shared heat exchanger is arranged between the high-pressure expansion machine and the centrifugal compressor; the wind generating set is respectively connected with the input end of the local load tower and the input end of the axial flow compressor, the output end of the centrifugal compressor is connected with the input end of the high-pressure expansion machine, and the output end of the low-pressure expansion machine is connected with the input end of the central load tower;
The mountain of land is provided with at least one mountain transverse gas storage, the input end of the mountain transverse gas storage is connected with the output end of the centrifugal compressor, and the output end of the mountain transverse gas storage is connected with the input end of the high-pressure expansion machine.
In some embodiments, the axial flow compressor and the mountain side air reservoir each comprise one;
the centrifugal compressor comprises a first centrifugal compressor and a second centrifugal compressor, wherein the input end of the first centrifugal compressor is connected with the output end of the axial flow compressor, the output end of the first centrifugal compressor is connected with the input end of the second centrifugal compressor, and the output end of the second centrifugal compressor is connected with the input end of the high-pressure expander.
In some embodiments, the system further comprises a buffer tank, wherein the input end of the buffer tank is connected with the output end of the second centrifugal compressor through a first regulating valve, and the output end of the buffer tank is connected with the input end of the second centrifugal compressor through a second regulating valve;
The mountain transverse gas storage is connected with the output end of the first regulating valve and the input end of the second regulating valve through a third regulating valve respectively.
In some embodiments, a cold storage heat exchanger is shared between the first regulating valve and an input end of the buffer tank, and between the second regulating valve and an output end of the buffer tank;
A pressure reducing device is arranged between the cold accumulation heat exchanger and the input end of the buffer tank; and/or a pressure boosting device is arranged between the cold accumulation heat exchanger and the output end of the buffer tank.
In some embodiments, the axial flow compressor comprises a first axial flow compressor and a second axial flow compressor, the centrifugal compressor comprises a third centrifugal compressor and a fourth centrifugal compressor;
The input end of the first axial flow compressor is connected with the wind generating set, the output end of the first axial flow compressor is connected with the input end of the second axial flow compressor, the output end of the second axial flow compressor is connected with the input end of the third centrifugal compressor, the output end of the third centrifugal compressor is connected with the input end of the fourth centrifugal compressor, and the output end of the fourth centrifugal compressor is connected with the input end of the high-pressure expansion machine.
In some embodiments, the expansion train further comprises a medium pressure expander, an input of the medium pressure expander being connected to an output of the high pressure expander, an output of the medium pressure expander being connected to an input of the low pressure expander.
In some embodiments, the mountain lateral gas storage comprises a first mountain lateral gas storage and a second mountain lateral gas storage, and the capacity of the first mountain lateral gas storage is greater than the capacity of the second mountain lateral gas storage;
The input end of the first mountain transverse gas storage and the input end of the second mountain transverse gas storage are connected with the output end of the fourth centrifugal compressor through a fourth regulating valve, and the output end of the first mountain transverse gas storage and the output end of the second mountain transverse gas storage are connected with the input end of the fourth centrifugal compressor through a fifth regulating valve.
In some embodiments, the axial flow compressor comprises one, the centrifugal compressor comprises a fifth centrifugal compressor, a sixth centrifugal compressor, and a seventh centrifugal compressor, the fifth centrifugal compressor input is connected to the output of the axial flow compressor, the output of the fifth centrifugal compressor is connected to the input of the sixth centrifugal compressor, the output of the sixth centrifugal compressor is connected to the input of the seventh centrifugal compressor, and the output of the seventh centrifugal compressor is connected to the input of the high pressure expander.
In some embodiments, the expansion train further comprises a medium pressure expander, an input of the medium pressure expander being connected to an output of the high pressure expander, an output of the medium pressure expander being connected to an input of the low pressure expander.
In some embodiments, the mountain lateral gas storage comprises a third mountain lateral gas storage, a fourth mountain lateral gas storage, and a fifth mountain lateral gas storage, and the third mountain lateral gas storage has a capacity greater than the fourth mountain lateral gas storage, and the fourth mountain lateral gas storage has a capacity greater than the fifth mountain lateral gas storage;
the input end of the third mountain transverse gas storage and the input end of the fifth mountain transverse gas storage are connected with the output end of the seventh centrifugal compressor through a sixth regulating valve;
the output end of the third mountain transverse gas storage and the output end of the fifth mountain transverse gas storage are connected with the input end of the seventh centrifugal compressor through a seventh regulating valve;
The input end of the fourth mountain transverse gas storage is connected with the output end of the third mountain transverse gas storage through an eighth regulating valve, and the output end of the fourth mountain transverse gas storage is connected with the output end of the fifth mountain transverse gas storage through a seventh regulating valve.
Compared with the prior art, the technical scheme provided by the embodiment of the invention has the following advantages:
The embodiment of the invention provides a novel pressurized storage system and a novel gas storage device based on wind storage and transportation. The wind generating set is arranged on the sea surface, the local load tower is arranged on the coast of the sea surface, and the central load tower is arranged on the land. The compressor unit at least comprises an axial flow compressor and a centrifugal compressor connected with the axial flow compressor, the expansion unit at least comprises a high-pressure expander and a low-pressure expander connected with the high-pressure expander, and a shared heat exchanger is arranged between the high-pressure expander and the centrifugal compressor. The wind generating set is respectively connected with the input end of the local load tower and the input end of the axial flow compressor, the output end of the centrifugal compressor is connected with the input end of the high-pressure expansion machine, and the output end of the low-pressure expansion machine is connected with the input end of the central load tower. The mountain land is provided with at least one mountain transverse gas storage, the input end of the mountain transverse gas storage is connected with the output end of the centrifugal compressor, and the output end of the mountain transverse gas storage is connected with the input end of the high-pressure expansion machine. That is, compared with the mode that a vertical shaft is required to be excavated downwards from the ground and a sealing layer, lining, surrounding rock and the like are arranged at the bottom of the vertical shaft to form a gas storage, the novel pressure storage system and the gas storage device based on wind storage, which are disclosed by the embodiment of the invention, realize compressed storage of gas by arranging the mountain transverse gas storage on a mountain, so that the whole mountain transverse gas storage is simple in structure and convenient to construct. In addition, the novel pressure storage system and the novel gas storage device based on wind storage and transportation are arranged, the compressor unit comprises the centrifugal compressor and the axial flow compressor, the expansion unit comprises the high-pressure expansion machine and the low-pressure expansion machine, and the high-pressure expansion machine and the centrifugal compressor are provided with the shared heat exchanger, so that high-efficiency large-flow, low-pressure loss and compact arrangement can be realized.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the embodiments of the invention.
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic diagram of a novel pneumatic storage system and a novel air storage device based on wind transportation according to an embodiment of the present invention;
FIG. 2 is a schematic diagram II of a novel pneumatic storage system and a novel air storage device based on wind transportation according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a novel pneumatic storage system and a novel pneumatic storage device based on wind transportation according to an embodiment of the invention.
1, A wind generating set; 11. a wind power generator; 2. a compressor unit; 21. an axial flow compressor; 211. a first axial flow compressor; 212. a second axial flow compressor; 22. a centrifugal compressor; 221. a first centrifugal compressor; 222. a second centrifugal compressor; 223. a third centrifugal compressor; 224. a fourth centrifugal compressor; 225. a fifth centrifugal compressor; 226. a sixth centrifugal compressor; 227. a seventh centrifugal compressor; 3. an expansion unit; 31. a high pressure expander; 32. a low pressure expander; 33. a medium pressure expander; 4. an in situ loading tower; 5. a central load tower; 51. a first load tower; 52. a second load tower; 6. sharing a heat exchanger; 7. mountain; 71. a mountain transverse gas storage; 711. a first mountain lateral gas storage; 712. a second mountain lateral gas reservoir; 713. a third mountain lateral gas storage; 714. fourth mountain lateral gas storages; 715. fifth mountain lateral gas storages; 81. a buffer tank; 82. a first regulating valve; 83. a second regulating valve; 84. a third regulating valve; 85. a cold-storage heat exchanger; 86. a pressure reducing device; 87. a boosting device; 91. a fourth regulating valve; 92. a fifth regulating valve; 93. a sixth regulating valve; 94. a seventh regulating valve; 95. an eighth regulating valve; 96. three-in-one motor of a motor-camera-generator; 97. a first clutch; 98. and a second clutch.
Detailed Description
In order that the above objects, features and advantages of embodiments of the invention may be more clearly understood, a further description of aspects of embodiments of the invention will be provided below. It should be noted that, without conflict, the embodiments of the present invention and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the invention, but embodiments of the invention may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the invention.
Referring to fig. 1 to 3, the present embodiment provides a novel pressurized storage system and a gas storage device based on wind power storage, which includes a wind power generator set 1, a compressor set 2, an expansion set 3, an on-site load tower 4, and a central load tower 5.
The wind generating set 1 is arranged on the sea surface, the on-site load tower 4 is arranged on the coast of the sea surface, and the central load tower 5 is arranged on the land.
The compressor unit 2 comprises at least one axial compressor 21 and one centrifugal compressor 22 connected to the axial compressor 21, and the expander unit 3 comprises at least one high-pressure expander 31 and one low-pressure expander 32 connected to the high-pressure expander 31, the common heat exchanger 6 being arranged between the high-pressure expander 31 and the centrifugal compressor 22. The wind generating set 1 is connected with an input end of the local load tower 4 and an input end of the axial flow compressor 21 respectively, an output end of the centrifugal compressor 22 is connected with an input end of the high pressure expansion machine 31, and an output end of the low pressure expansion machine 32 is connected with an input end of the central load tower 5.
At least one mountain transverse air reservoir 71 is arranged on the mountain 7 on land, the input end of the mountain transverse air reservoir 71 is connected with the output end of the centrifugal compressor 22, and the output end of the mountain transverse air reservoir 71 is connected with the input end of the high-pressure expander 31.
In particular, referring to fig. 1, a wind turbine generator system 1 may be installed on the sea surface, so that power generation may be performed using offshore wind, thereby achieving efficient use of wind. The on-site load tower 4 is arranged on the coast of the sea surface and is connected to the wind power unit 1, so that the electric energy generated by the wind power unit 1 can be transmitted to the on-site load tower 4 for on-site use by a user.
Further, in this embodiment, the input end of the axial compressor 21 is connected to the wind generating set 1, the output end of the centrifugal compressor 22 is connected to the input end of the high-pressure expander 31, and the output end of the high-pressure expander 31 is connected to the central load tower 5, so that energy storage can be achieved by compressing air by the axial compressor 21 and the centrifugal compressor 22, and energy release can be achieved by generating electricity by expanding the high-pressure expander 31 and the low-pressure expander 32.
Specifically, during energy storage, the compressor unit 2 is driven to operate, so that low-pressure air, nitrogen or carbon dioxide can be compressed to be in a liquid state or a sub/trans/supercritical state according to the power and the duration of the stored electric energy, and then stored in the mountain transverse air storage 71. When releasing energy, compressed air or nitrogen or carbon dioxide in the mountain transverse air storage 71 can be conveyed into the expansion unit 3 to perform expansion work so as to realize power generation. The operation principle of the specific expansion unit 3 and the compressor unit 2 may be described with reference to the related art, which is not particularly limited in this embodiment. In addition, compared with an air pressure storage system, the carbon dioxide pressure storage system has the advantages of high energy storage density, low economic cost, long operation life, compact system equipment, negative carbon emission and the like.
Specifically, a transverse tunnel extending in the horizontal direction can be manually excavated on the mountain 7 to form the mountain transverse gas storage 71, so that the gas storage device has a simple structure, is simple and convenient to construct and has reduced cost. In addition, under the condition of the mountain transverse gas storage 71 with the water-bearing layer, the constant-pressure compression and expansion of air can be realized by utilizing the constant-pressure characteristic of the mountain transverse gas storage 71, so that the energy consumption and the equipment loss rate are reduced, and meanwhile, the water content of the working medium of the mountain transverse gas storage 71 is increased, so that the higher-efficiency near-isothermal compression in a wet compression environment, the quality improvement and the enthalpy increase of turbine inlet parameters are facilitated, and the gas storage capacity and the density are improved. Meanwhile, the pressure resistance inside the mountain 7 is far greater than the highest exhaust pressure and the highest intake pressure of the existing compressor and expander of the pressure storage system, so that the natural mountain environment can be utilized, and the capacity-expanding artificial gas storage with large scale and low cost can be utilized to improve the energy storage capacity and density. In addition, the mountain 7 is transversely excavated to form the transverse tunnel, so that the cost of the gas storage device can be greatly reduced, and the gas storage device can be flexibly configured according to the geographic position and the gas storage requirement.
Specifically, the air storage amount, the shape and the like of the mountain transverse air storage 71 can be determined according to the required air storage capacity requirement, the construction cost of the mountain transverse air storage 71 can be reduced to 3000 yuan/square meter, and the altitude of the mountain transverse air storage 71 can be basically kept at the same altitude as that of a conventional pressurized air storage system, so that the high construction cost of a construction vertical shaft is avoided, and the transportation cost caused by long-distance longitudinal transportation lines during the construction of the vertical shaft is reduced, and meanwhile, the pressurized loss of the high-pressure air in the process of storing/releasing energy is greatly reduced.
Illustratively, the wind power generator set 1 is installed in deep sea, and the sea wind has a high flow rate and stable air flow. The mountain foot flat portion of the coastal mountain 7 can be constructed with a pressurized storage system of the mountain lateral air storages 71 to facilitate low cost construction. The wind generating set 1 is arranged on the windward side of the mountain 7, and the high altitude wind speed on the windward side of the mountain 7 is high and the air flow is stable, so that the wind can be efficiently utilized. In addition, the on-site load tower 4 is provided on the lee side of the mountain 7, where the airflow sinks, warms up and dries and the freezing rain is less, thus facilitating the construction of the on-site load tower 4.
The utilization time of the wind generating set 1 arranged on the sea surface can reach 10h-14h, the utilization time of the pressure storage system with the mountain transverse gas storage 71 can reach 4h-6h, and all-weather alternating current and direct current output of the extra-high voltage output channel can be realized as far as possible.
For example, the sea surface in this embodiment may be located in the east peninsula (the mountain of Laoshan is at a main peak elevation of 1000-1200 m), the long triangle (the mountain of Yan Liang mountain is at a main peak elevation of 1000-1100 m), the Minnan (the mountain of Daiyun is at a main peak elevation of 1000-1100 m), the North Bay (the mountain of hundred thousand mountain is at a main peak elevation of 1400-1500 m), and Guangdong (the mountain of lotus is at a main peak elevation of 1300-1600 m). Representative regions around the open world include the north american continental west coast (average elevation of mountain fall 2000-3000 meters), the south american continental west coast (andes mountain 3000-4000 meters). The area is developed economically, the matching of the industrial chain is complete, the electricity load is high, the peak-valley electricity price difference is large, the coastal wind energy resource is good, the area for the gas storage is saved by utilizing the nearby mountain environment, and the land-feature cost is reduced.
That is, compared with the mode that the vertical shaft is required to be excavated downwards from the ground and the sealing layer, lining, surrounding rock and the like are arranged at the bottom of the vertical shaft to form the gas storage, the novel pressurized gas storage system and the gas storage device based on wind gas storage of the embodiment realize compressed gas storage by arranging the high-mountain transverse gas storage 71 on the high mountain 7 on coastal lands, so that the whole high-mountain transverse gas storage 71 has a simple structure and is simple and convenient to construct.
In addition, in the present embodiment, by arranging the wind turbine generator system 1 on the sea surface and connecting the wind turbine generator system 1 with the on-site load tower 4, and combining the pressurized storage system with the mountain transverse gas storage 71, the integration of the sub/trans/supercritical pressurized storage system or the wind storage and transportation of the wind farm directly coupled to the source side can be realized.
Specifically, when the source side supply electric quantity and the load side demand electric quantity of the wind power station are matched, the pressure storage system does not work, and the wind power transmission and transmission integrated operation is performed. When the power supplied by the source side of the wind power station is larger than the power required by the coastal load side, particularly when the sea wind intensity in the deep sea is large and the electricity for production and living enters the valley, the pressure storage system with the mountain transverse gas storage 71 starts to absorb the surplus new energy power of the source side or the valley power of the power grid to store energy, and the electric energy is converted into the gas pressure potential energy stored in the gas storage device and the gas heat energy stored in the heat exchange device through the electromechanical equipment, so that the wind storage and transportation integrated operation is realized. When the power supplied by the source side of the wind power station is smaller than the power required by the coastal load side, particularly when the sea wind intensity in the deep sea is smaller and the electricity for production and living enters a peak, the peak value of the stored electric energy is supplemented before the pressure storage system begins to release, and the wind storage and transmission integrated operation is carried out. The wind storage and transmission integrated system operates in different embodiments in 24h time intervals, improves the actual utilization rate of an extra-high voltage output channel alternating current/direct current output line, and achieves the gain functions of smooth and stable output, ordered planning tracking, efficient peak regulation, frequency modulation and the like of new energy power generation grid connection as much as possible.
In addition, in the present embodiment, the positions and the number of the common heat exchangers 6 may be determined according to the temperature difference and the pressure difference of the respective sections of the compressor unit 2 and the expander unit 3, and the positions and the number of the common mechanical devices and the electrical devices may be determined according to the power and the rotation speed of the respective sections of the compressor unit 2 and the expander unit 3.
Illustratively, the choice of the centrifugal compressor 22 and the axial compressor 21 of the compressor train 2 may be determined based on pressure ratio, flow, power, etc. In this embodiment, a multistage axial-centrifugal combined compressor is selected as the compressor unit 2. The combined compressor has the advantages of high efficiency, large flow, large pressure ratio and large working margin. In addition, the compressor unit 2 and the expander unit 3 adopt multi-shaft multi-stage forms, so that inlet guide vane adjustment and interstage heat recovery are facilitated. The centrifugal stages are easy to realize axial air intake, have no bend and reflux structure of a single shaft, and have even air flow at the inlet of the impeller and small loss; the structure forms of all stages are basically the same and are convenient for pneumatic design, each stage of pinion shaft is composed of an axial air inlet pipeline, an inlet guide vane, an impeller, a diffuser and a volute, the rotation speeds of all stages of pinion shafts are different, the rotation speed can be optimized according to the flow coefficient of the high-efficiency ternary impeller, and the model stage of a small flow system does not need to be forcedly selected at a high-pressure stage, so that the average efficiency of the whole machine is reduced.
In particular, the advantages of the centrifugal compressor 22 are mainly represented by: the device has the advantages of high level pressure ratio, wide surge margin, compact structure, few vulnerable parts, stable operation, isothermal compression and the like. The advantages of the axial compressor 21 are mainly represented by: the advantages of the axial compressor 21 are mainly represented by: large flow, high efficiency, high power and smaller radial dimension.
Referring to fig. 1, in some embodiments, both the axial compressor 21 and the mountain lateral air reservoir 71 comprise one.
The centrifugal compressor 22 includes a first centrifugal compressor 221 and a second centrifugal compressor 222, the input end of the first centrifugal compressor 221 is connected to the output end of the axial flow compressor 21, the output end of the first centrifugal compressor 221 is connected to the input end of the second centrifugal compressor 222, and the output end of the second centrifugal compressor 222 is connected to the input end of the high pressure expander 31.
That is, referring to fig. 1, in the present embodiment, the axial flow compressor 21 is provided in one stage, and the centrifugal compressor 22 is provided in two stages, that is, includes the first centrifugal compressor 221 and the second centrifugal compressor 222, so that the combined compressor train 2 of the one-stage axial flow compressor 21 and the two-stage centrifugal compressor 22 can be formed. At this time, the axial compressor 21 may not be connected to the common heat exchanger 6, but the centrifugal compressor 22 and the high-pressure expander 31 are connected to the common heat exchanger 6, so as to achieve the 300 MW-class high-temperature/medium-cooling wide-load high-flow compression effect.
Referring to fig. 1, in some embodiments, a buffer tank 81 is further included, and an input end of the buffer tank 81 is connected to an output end of the second centrifugal compressor 222 through a first regulating valve 82, and an output end of the buffer tank 81 is connected to an input end of the second centrifugal compressor 222 through a second regulating valve 83.
The mountain lateral gas storage 71 is connected to the output of the first regulating valve 82 and the input of the second regulating valve 83 through the third regulating valve 84, respectively.
In this embodiment, a buffer tank 81 is provided for liquid compression or sub/trans/supercritical storage of air or nitrogen or carbon dioxide. The system efficiency can be remarkably improved by carrying out liquid state or sub/trans/supercritical state energy storage on compressed air or nitrogen or carbon dioxide; the specific gas storage state of the pressure storage system can be flexibly selected according to the power and the duration of the stored electric energy required by the wind power plant or the valley electricity.
For example, the first, second and third regulating valves 82, 83 and 84 may each be three-way valves.
Referring to fig. 1, in some embodiments, a cold storage heat exchanger 85 is shared between the first regulator valve 82 and the input of the buffer tank 81, and between the second regulator valve 83 and the output of the buffer tank 81. A pressure reducing device 86 is arranged between the cold accumulation heat exchanger 85 and the input end of the buffer tank 81; a booster 87 is provided between the cold storage heat exchanger 85 and the output end of the buffer tank 81.
In the energy storage process, compressed air, nitrogen or carbon dioxide is cooled and liquefied by cold energy stored in the cold storage heat exchanger 85 at equal pressure, and is depressurized by the depressurization device 86 and then stored in the mountain transverse gas storage 71 at normal pressure. In the energy release process, the cold accumulation heat exchanger 85 is used for heating air, nitrogen or carbon dioxide to normal temperature and then conveying the air, nitrogen or carbon dioxide to the expander for expansion power generation.
Referring to fig. 2, in some embodiments, the axial compressor 21 includes a first axial compressor 211 and a second axial compressor 212, and the centrifugal compressor 22 includes a third centrifugal compressor 223 and a fourth centrifugal compressor 224.
The input end of the first axial flow compressor 211 is connected with the wind generating set 1, the output end of the first axial flow compressor 211 is connected with the input end of the second axial flow compressor 212, the output end of the second axial flow compressor 212 is connected with the input end of the third centrifugal compressor 223, the output end of the third centrifugal compressor 223 is connected with the input end of the fourth centrifugal compressor 224, and the output end of the fourth centrifugal compressor 224 is connected with the input end of the high pressure expander 31.
That is, as shown with reference to fig. 2, the axial compressor 21 may be provided in two stages, that is, including a first axial compressor 211 and a second axial compressor 212. The centrifugal compressor 22 may also be provided in two stages, i.e. comprising a third centrifugal compressor 223 and a fourth centrifugal compressor 224, so that a combined compressor package 2 of two-stage axial compressors 21 and two-stage centrifugal compressors 22 may be formed. At this time, the axial compressor 21 may be connected to the high-pressure expander 31 without the common heat exchanger 6, and the centrifugal compressor 22 may be connected to the common heat exchanger 6, so that the 300 MW-stage high-temperature/intermediate-cooling wide-load large-flow compression effect may be achieved.
Referring to fig. 2, in some embodiments, the expansion unit 3 further includes a medium pressure expander 33, an input of the medium pressure expander 33 being connected to an output of the high pressure expander 31, and an output of the medium pressure expander 33 being connected to an input of the low pressure expander 32.
That is, the expansion unit 3 includes a first-stage high-pressure expansion machine 31, a first-stage medium-pressure expansion machine 33 and a first-stage low-pressure expansion machine 32, and the high-pressure expansion machine 31 and the medium-pressure expansion machine 33 can be externally connected with the centrifugal compressor 22 to share the heat exchanger 6, so that the expansion effect of 300 MW-stage full-pressure drop sliding type high-load super-large-scale air supplement can be realized.
In addition, the intelligent control system for one-key start and stop of the whole factory can be additionally arranged to control the running states of the whole novel pressure storage system and the air storage device based on wind storage transportation.
Referring to fig. 2, in some embodiments, the alpine lateral gas reservoirs 71 include a first alpine lateral gas reservoir 711 and a second alpine lateral gas reservoir 712, and the capacity of the first alpine lateral gas reservoir 711 is greater than the capacity of the second alpine lateral gas reservoir 712. The input end of the first mountain transverse air reservoir 711 and the input end of the second mountain transverse air reservoir 712 are connected with the output end of the fourth centrifugal compressor 224 through the fourth regulating valve 91, and the output end of the first mountain transverse air reservoir 71 and the output end of the second mountain transverse air reservoir 712 are connected with the input end of the fourth centrifugal compressor 224 through the fifth regulating valve 92.
That is, in the present embodiment, the mountain lateral gas storages 71 may be provided in two different capacities, that is, may include the first mountain lateral gas storages 711 and the second mountain lateral gas storages 712, so that gas can be stored through the first mountain lateral gas storages 711 and the second mountain lateral gas storages 712, respectively, at which time the second mountain lateral gas storages 712 of small capacity may be stored as a buffer device.
By way of example, the fourth and fifth regulator valves 91 and 92 may each be a three-way valve.
Referring to fig. 3, in some embodiments, the axial compressor 21 includes one, the centrifugal compressor 22 includes a fifth centrifugal compressor 225, a sixth centrifugal compressor 226, and a seventh centrifugal compressor 227, the fifth centrifugal compressor 225 input is connected to the output of the axial compressor 21, the output of the fifth centrifugal compressor 225 is connected to the input of the sixth centrifugal compressor 226, the output of the sixth centrifugal compressor 226 is connected to the input of the seventh centrifugal compressor 227, and the output of the seventh centrifugal compressor 227 is connected to the input of the high pressure expander 31.
That is, as shown with reference to fig. 2, the axial compressor 21 may be provided as one stage. The centrifugal compressor 22 may also be provided in three stages, i.e., including a fifth centrifugal compressor 225, a sixth centrifugal compressor 226, and a seventh centrifugal compressor 227, so that a combined compressor train 2 of the one-stage axial compressor 21 and the three-stage centrifugal compressor 22 may be formed. At this time, the axial compressor 21 may be connected to the high-pressure expander 31 without the common heat exchanger 6, and the centrifugal compressor 22 may be connected to the common heat exchanger 6, so that the 300 MW-stage high-temperature/intermediate-cooling wide-load large-flow compression effect may be achieved.
Referring to fig. 3, in some embodiments, the expansion unit 3 further includes a medium pressure expander 33, an input of the medium pressure expander 33 being connected to an output of the high pressure expander 31, and an output of the medium pressure expander 33 being connected to an input of the low pressure expander 32.
That is, the expansion unit 3 includes a first-stage high-pressure expansion machine 31, a first-stage medium-pressure expansion machine 33 and a first-stage low-pressure expansion machine 32, and the high-pressure expansion machine 31 and the medium-pressure expansion machine 33 can be externally connected with the centrifugal compressor 22 to share the heat exchanger 6, so that the expansion effect of 300 MW-stage full-pressure drop sliding type high-load super-large-scale air supplement can be realized.
Referring to fig. 3, in some embodiments, the mountain lateral gas storage 71 includes a third mountain lateral gas storage 713, a fourth mountain lateral gas storage 714, and a fifth mountain lateral gas storage 715, and the capacity of the third mountain lateral gas storage 713 is greater than the capacity of the fourth mountain lateral gas storage 714, and the capacity of the fourth mountain lateral gas storage 714 is greater than the capacity of the fifth mountain lateral gas storage 715.
The input end of the third alpine lateral gas storage 713 and the input end of the fifth alpine lateral gas storage 715 are connected with the output end of the seventh centrifugal compressor 227 through the sixth regulating valve 93.
The output end of the third alpine lateral gas reservoir 713 and the output end of the fifth alpine lateral gas reservoir 715 are connected with the input end of the seventh centrifugal compressor 227 through a seventh regulating valve 94.
The input end of the fourth mountain lateral gas storage 714 is connected with the output end of the third mountain lateral gas storage 713 through an eighth regulating valve 95, and the output end of the fourth mountain lateral gas storage 714 is connected with the output end of the fifth mountain lateral gas storage 715 through a seventh regulating valve 94.
That is, in the present embodiment, the mountain lateral gas storages 71 may be provided with three different capacities, that is, may include the third mountain lateral gas storages 713, the fourth mountain lateral gas storages 714, and the fifth mountain lateral gas storages 715, so that gas storage may be performed through the third mountain lateral gas storages 713, the fourth lateral gas storages, and the fifth mountain lateral gas storages 715, respectively, at which time the fifth mountain lateral gas storages 715 with small capacity may be used as a buffer device to realize storage, and the third lateral gas storages and the fourth lateral gas storages with larger capacities may be interconnected and intercommunicated.
Illustratively, the sixth, seventh, and eighth regulator valves 93, 94, 95 may each be a three-way valve.
Referring to fig. 1 to 3, in some embodiments, the cross section of the mountain lateral gas storages 71 is circular, or may be elliptical, arced, etc., so that the excavation of the mountain lateral gas storages 71 is simple and convenient. In addition, the cross section of the mountain lateral air reservoir 71 may be rectangular or trapezoidal, and the specific shape of the mountain lateral air reservoir 71 may be set according to the actual terrain, construction conditions, air storage capacity, and other requirements, which is not particularly limited in this embodiment.
Referring to fig. 1 to 3, in some embodiments, the diameter of the lateral gas storages 71 is not less than 30m, so that the lateral gas storages 71 may have a sufficient capacity to enable the storage of compressed gas.
The diameter of the mountain lateral gas storages 71 may be 30m, or may be 35m, or may be 40m, or the like, for example.
Accordingly, the cross sectional area of the mountain lateral gas storage 71 is not less than 700 square meters, and the mountain lateral gas storage 71 is provided with a sufficient capacity for storing gas by providing the cross sectional area of the mountain lateral gas storage 71 is not less than 700 square meters.
The cross-sectional area of the alpine lateral gas storages 7161 may be 700 square meters, or may be 750 square meters, or may be 800 square meters, for example.
Referring to fig. 1, in some embodiments, the central load tower 5 includes a first load tower 51 and a second load tower 52 connected to the first load tower 51, the first load tower 51 being connected to the output of the expansion train 3.
That is, in order to meet the electricity demand of the city, the central load tower 5 may be configured to include two, i.e., a first load tower 51 and a second load tower 52, wherein the first load tower 51 is connected to the output end of the expansion unit 3, so that the electric energy generated by the wind generating set 1 may be transferred to the first load tower 51, and may be continuously transferred to the second load tower 52 through the first load tower 51, so that the electric energy may be finally transferred to the large power grid in the city through the first load tower 51 and the second load tower 52 for the user.
In addition, in other implementations, the number of the central load towers 5 can be three or more, which is determined according to urban electricity demand.
Referring to fig. 1, in some embodiments, the wind power generator set 1 includes at least two wind power generators 11, where the at least two wind power generators 11 are all disposed on the sea surface, and the at least two wind power generators 11 are connected to the input end of the on-site load tower 4 and the input end of the compressor set 2, respectively, so that the wind power can be converted into electric energy through the at least two wind power generators 11 together, so as to further improve the wind utilization rate.
Referring to fig. 1, in some embodiments, the compressor unit 2 and the expander unit 3 are connected by a "motor-conditioner-generator" three-in-one motor 96, and the compressor unit 2 and the expander unit 3 are coaxially disposed. A first clutch 97 is arranged between the three-in-one motor and the compressor unit 2, and a second clutch 98 is arranged between the three-in-one motor 96 of the motor-regulator-generator and the expander unit 3.
In concrete implementation, through setting up compressor unit 2 and the coaxial setting of expansion unit 3, can make whole arranging compacter to reduce entire system's volume, and can reduce the electromechanical conversion loss that multiaxis connection brought, improve energy conversion efficiency, be favorable to improving system's integrated level and space utilization, practice thrift construction and fortune dimension cost, reach the effect that falls to increase.
Further, the three-in-one motor 96 of the "motor-regulator-generator" is connected to the compressor unit 2 through the first clutch 97, so that the three-in-one motor 96 of the "motor-regulator-generator" can be used as a motor to drive the compressor unit 2 to compress air, nitrogen or carbon dioxide, and then the compressed air, nitrogen or carbon dioxide can be stored in the mountain transverse air reservoir 71 for storage. Accordingly, the second clutch 98 is connected with the expansion unit 3, so that the three-in-one motor 96 of the motor-regulator-generator can be used as a generator to drive the expansion unit 3 to expand and generate electricity. In addition, the three-in-one motor 96 of the motor-regulator-generator can also be used as a regulator, increases reactive power output when the voltage of the power grid decreases, absorbs reactive power when the voltage of the power grid increases, maintains the voltage of the power grid, improves the stability of the system and improves the power supply quality of the system.
That is, the "motor-governor-generator" three-in-one motor 96 is specifically a three-in-one motor of a generator, a motor, and a governor, and the three-in-one motor is used in combination with a clutch, so that the cost of mechanical equipment and electrical equipment can be greatly reduced. The specific coaxial compact arrangement mode is flexible, and the positions and the number of the common mechanical equipment and the electric equipment can be determined according to the power and the rotating speed of each section of the compressor unit 2 and the expansion unit 3.
Regarding the operation of the "motor-regulator-generator" three-in-one motor 96, specifically, when the first clutch 97 is in the connected state and the second clutch 98 is in the disconnected state, the second output shaft of the "motor-regulator-generator" three-in-one motor 96 is connected to the compressor unit 2, so that the compressor unit 2 can be driven to operate, and at this time, the air, nitrogen or carbon dioxide compression energy storage process is performed. When the first clutch 97 is in the off state and the second clutch 98 is in the connection state, the second input shaft of the motor-regulator-generator three-in-one motor 96 is connected with the expansion unit 3, so that the expansion unit 3 can be driven to operate for generating electricity, and the expansion energy release and generation process of air, nitrogen or carbon dioxide is performed at the moment.
The operation principle of the motor-camera-generator three-in-one motor 96, the expansion unit 3, and the compressor unit 2 is described with reference to the related art, and this embodiment will not be described in detail.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely a specific implementation of an embodiment of the invention, so that those skilled in the art may understand or implement the embodiment of the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the embodiments of the invention. Thus, the present embodiments are not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features of the embodiments disclosed herein.
Claims (10)
1. The novel pressure storage system and the novel gas storage device based on wind storage and transportation are characterized by comprising a wind generating set (1), a compressor set (2), an expansion set (3), an on-site load tower (4) and a central load tower (5);
The wind generating set (1) is arranged on the sea surface, the local load tower (4) is positioned on the coast of the sea surface, and the central load tower (5) is positioned on land;
The compressor unit (2) at least comprises an axial flow compressor (21) and a centrifugal compressor (22) connected with the axial flow compressor (21), the expansion unit (3) at least comprises a high-pressure expansion machine (31) and a low-pressure expansion machine (32) connected with the high-pressure expansion machine (31), and a common heat exchanger (6) is arranged between the high-pressure expansion machine (31) and the centrifugal compressor (22); the wind generating set (1) is respectively connected with the input end of the local load tower (4) and the input end of the axial flow compressor (21), the output end of the centrifugal compressor (22) is connected with the input end of the high-pressure expansion machine (31), and the output end of the low-pressure expansion machine (32) is connected with the input end of the central load tower (5);
The mountain (7) of the land is provided with at least one mountain transverse gas storage (71), the input end of the mountain transverse gas storage (71) is connected with the output end of the centrifugal compressor (22), and the output end of the mountain transverse gas storage (71) is connected with the input end of the high-pressure expansion machine (31).
2. The novel pressurized storage system and gas storage device based on wind transportation according to claim 1, wherein said axial compressor (21) and said mountain transversal gas storage (71) each comprise one;
The centrifugal compressor (22) comprises a first centrifugal compressor (221) and a second centrifugal compressor (222), wherein the input end of the first centrifugal compressor (221) is connected with the output end of the axial flow compressor (21), the output end of the first centrifugal compressor (221) is connected with the input end of the second centrifugal compressor (222), and the output end of the second centrifugal compressor (222) is connected with the input end of the high-pressure expansion machine (31).
3. The novel pressurized storage system and the gas storage device based on wind storage and transportation according to claim 2, further comprising a buffer tank (81), wherein the input end of the buffer tank (81) is connected with the output end of the second centrifugal compressor (222) through a first regulating valve (82), and the output end of the buffer tank (81) is connected with the input end of the second centrifugal compressor (222) through a second regulating valve (83);
The mountain transverse gas storage (71) is respectively connected with the output end of the first regulating valve (82) and the input end of the second regulating valve (83) through a third regulating valve (84).
4. A novel pressurized storage system and a gas storage device based on wind storage according to claim 3, characterized in that a cold storage heat exchanger (85) is shared between the first regulating valve (82) and the input end of the buffer tank (81), and between the second regulating valve (83) and the output end of the buffer tank (81);
A pressure reducing device (86) is arranged between the cold accumulation heat exchanger (85) and the input end of the buffer tank (81); and/or a booster device (87) is arranged between the cold accumulation heat exchanger (85) and the output end of the buffer tank (81).
5. The novel pressurized storage system and gas storage device based on wind transportation according to claim 1, wherein the axial compressor (21) comprises a first axial compressor (211) and a second axial compressor (212), and the centrifugal compressor (22) comprises a third centrifugal compressor (223) and a fourth centrifugal compressor (224);
The input end of the first axial flow compressor (211) is connected with the wind generating set (1), the output end of the first axial flow compressor (211) is connected with the input end of the second axial flow compressor (212), the output end of the second axial flow compressor (212) is connected with the input end of the third centrifugal compressor (223), the output end of the third centrifugal compressor (223) is connected with the input end of the fourth centrifugal compressor (224), and the output end of the fourth centrifugal compressor (224) is connected with the input end of the high-pressure expansion machine (31).
6. The novel pressurized storage system and the gas storage device based on wind transportation according to claim 5, wherein the expansion unit (3) further comprises a medium-pressure expansion machine (33), the input end of the medium-pressure expansion machine (33) is connected with the output end of the high-pressure expansion machine (31), and the output end of the medium-pressure expansion machine (33) is connected with the input end of the low-pressure expansion machine (32).
7. The novel pressurized storage system and gas storage device based on wind transportation as defined in claim 6, wherein the mountain lateral gas storage (71) comprises a first mountain lateral gas storage (711) and a second mountain lateral gas storage (712), and the capacity of the first mountain lateral gas storage (711) is greater than the capacity of the second mountain lateral gas storage (712);
The input end of the first mountain transverse gas storage (711) and the input end of the second mountain transverse gas storage (712) are connected with the output end of the fourth centrifugal compressor (224) through a fourth regulating valve (91), and the output end of the first mountain transverse gas storage (711) and the output end of the second mountain transverse gas storage (712) are connected with the input end of the fourth centrifugal compressor (224) through a fifth regulating valve (92).
8. The novel pressurized storage system and the gas storage device based on wind storage and transportation according to claim 1, wherein the axial flow compressor (21) comprises one, the centrifugal compressor (22) comprises a fifth centrifugal compressor (225), a sixth centrifugal compressor (226) and a seventh centrifugal compressor (227), an input end of the fifth centrifugal compressor (225) is connected with an output end of the axial flow compressor (21), an output end of the fifth centrifugal compressor (225) is connected with an input end of the sixth centrifugal compressor (226), an output end of the sixth centrifugal compressor (226) is connected with an input end of the seventh centrifugal compressor (227), and an output end of the seventh centrifugal compressor (227) is connected with an input end of the high pressure expander (31).
9. The novel pressurized storage system and the gas storage device based on wind storage and transportation according to claim 8, wherein the expansion unit (3) further comprises a medium-pressure expansion machine (33), the input end of the medium-pressure expansion machine (33) is connected with the output end of the high-pressure expansion machine (31), and the output end of the medium-pressure expansion machine (33) is connected with the input end of the low-pressure expansion machine (32).
10. The novel pressurized storage system and gas storage device based on wind transportation as defined in claim 9, wherein said mountain lateral gas storage (71) comprises a third mountain lateral gas storage (713), a fourth mountain lateral gas storage (714) and a fifth mountain lateral gas storage (715), and wherein the capacity of said third mountain lateral gas storage (713) is greater than the capacity of said fourth mountain lateral gas storage (714), and the capacity of said fourth mountain lateral gas storage (714) is greater than the capacity of said fifth mountain lateral gas storage (715);
The input end of the third mountain transverse air storage (713) and the input end of the fifth mountain transverse air storage (715) are connected with the output end of the seventh centrifugal compressor (227) through a sixth regulating valve (93);
the output end of the third mountain transverse air storage (713) and the output end of the fifth mountain transverse air storage (715) are connected with the input end of the seventh centrifugal compressor (227) through a seventh regulating valve (94);
The input end of the fourth mountain transverse gas storage (714) is connected with the output end of the third mountain transverse gas storage (713) through an eighth regulating valve (95), and the output end of the fourth mountain transverse gas storage (714) is connected with the output end of the fifth mountain transverse gas storage (715) through a seventh regulating valve (94).
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