314 results about "Underground gas storage" patented technology

The invention discloses a tunnel type underground gas storage combined with temperature control, belongs to the technical field of compressed air energy storage, and can solve the problems that the cost of temperature control measures in an existing gas storage is high, and maintenance is difficult. The gas storage comprises a lining; the sealing structure covers the inner wall surface of the lining; the breathable heat conduction structure sleeves the inner side of the sealing structure; an annular cavity is formed between the sealing structure and the breathable heat conduction structure; the annular partition pieces are sequentially arranged in the annular cavity in the axial direction of the gas storage and used for dividing the annular cavity into a first temperature control area and other temperature control areas which are sequentially arranged, and the simulated operation temperature of each temperature control area is sequentially increased from the first temperature control area; a water storage bag is arranged in each temperature control area; and the water circulation structure is arranged on the outer side of the gas storage, communicates with each water storage bag and is used for forming a circulation water path with the water storage bags. The method is used for temperature control of the tunnel type underground gas storage.

Disclosed in the present invention are an underground gas storage device for compressed air energy storage and a construction method therefor. The underground gas storage device for compressed air energy storage comprises an underground gas storage cavern, the underground gas storage cavern being formed of a plurality of underground gas storage cavern sections, wherein a connecting tunnel is provided between two non-adjacent underground gas storage cavern sections, a vertical shaft is provided at the top end of the connecting tunnel, and a sealing plug is provided in the intersection between the vertical shaft and the connecting tunnel; a gas intake pipeline and a gas output pipeline are provided in the vertical shaft, and a sump is provided on an outer bottom wall of the connecting tunnel; a first drainage ditch is provided around the top face edge of the sealing plug in the vertical shaft, and the first drainage ditch is in communication with the sump; and a drainage blind pipe assembly is provided on the periphery of the underground gas storage cavern sections, and the drainage blind pipe assembly is in communication with the sump via a second drainage ditch arranged at the outer bottom wall of the connecting tunnel. The present invention can achieve one-time excavation forming, without transformation and with relatively low construction difficulty, and can effectively reduce the influence of underground water on the underground gas storage cavern during a construction period, operation period and maintenance period.

The invention discloses an underground gas storage prestress lining structure and a construction method, and relates to the technical field of underground gas storage, the underground gas storage prestress lining structure comprises a lining layer formed by concrete pouring and internally provided with prestress steel bars; the sealing layer is arranged on the inner side of the lining layer and defines a gas storage chamber; the sliding layer is arranged between the lining layer and the sealing layer. The arrangement of the prestressed reinforcements can counteract part of internal pressure of the gas storage, so that the problem of concrete cracking is relieved. The lining layer is divided into the first lining layer and the second lining layer, the tensioning notch is reserved in the bottom of the first lining layer and provides sufficient tensioning space for the prestressed steel bars, the tensioning effect of the prestressed steel bars is ensured, the second lining layer is formed in the tensioning notch in a pouring mode after the prestressed steel bars are tensioned, and the integrity of the lining layer is ensured. After the sealing layer is constructed, grouting is conducted on the gap between the lining layer and the sliding layer, it is guaranteed that grouting is compact and complete, stress concentration is reduced, and the problem of concrete cracking is further relieved.

The invention belongs to the technical field of underground gas storage, and particularly relates to a long-term efficient hydrogen storage composite lining structure for an underground rock cavern and a preparation method of the long-term efficient hydrogen storage composite lining structure. The long-term efficient hydrogen storage composite lining structure for the underground rock cavern comprises surrounding rock and an internal composite structure of the surrounding rock. The surrounding rock reinforcing layer is formed by pressure pre-grouting in surrounding rock and can resist tensile stress transmitted to the surrounding rock by internal air pressure and enhance air tightness; the permeable layer is arranged on the inner side of the surrounding rock reinforcing layer and can discharge underground water to prevent hydrostatic pressure from causing extrusion deformation damage to the concrete bearing layer during construction and causing instability of the sealing steel lining; the reinforced concrete bearing layer is arranged on the inner side of the permeable layer and the outer side of the slip layer, and micro self-healing capsules capable of repairing cracks and enhancing sealing performance are evenly added in the injection molding process; the anti-drag sliding layer is arranged between the steel lining and the bearing layer and inhibits shear damage of the sealing steel lining to the bearing layer under high internal pressure; the steel lining sealing layer is arranged on the inner side of the sliding layer to bear part of gas load and seal gas.

The invention discloses a compressed air energy storage indoor simulation test device and method, and relates to the technical field of compressed air energy storage. The device comprises a triaxial pressure servo control system, a temperature control system, an air pressure control system and a multi-parameter measurement system, and can cooperatively simulate the real working environment of the underground gas storage. The triaxial system comprises a high-pressure tank body and a loading device and is used for applying triaxial stress to the rock sample; the temperature control system adjusts the temperature of the rock sample; the air pressure system comprises a high-pressure destructive experiment mode and a low-pressure precise simulation mode, the high-pressure destructive experiment mode is used for carrying out a high-pressure test and verifying the critical burial depth under different geological conditions, and the low-pressure precise simulation mode is used for researching the mechanical behavior, the damage mechanism and the leakage mechanism of the gas storage by regulating and controlling the air pressure and the flow and simulating the inflation and deflation process; the multi-parameter measurement system collects rock sample physical response data in real time. Through cooperative work of multiple systems, response characteristics of multiple support sealing systems under different conditions can be accurately reflected, and the system has remarkable simulation precision, experiment efficiency and cost advantages.

The invention belongs to the technical field of compressed air energy storage facilities, and particularly discloses an underground gas storage chamber and a construction method thereof.The underground gas storage chamber comprises a surrounding rock structure and a gas storage structure, the surrounding rock structure is provided with a storage space, and the gas storage structure is located in the storage space; the structure comprises a primary support, a lining layer, a sealing layer, a sliding layer and a lining layer which are sequentially arranged from outside to inside, a pressure reduction layer is arranged in the lining layer, the lining layer is divided into a first lining layer and a second lining layer by the pressure reduction layer, and the pressure reduction layer is made of a deformable material. A traditional single-layer lining layer is replaced by the double-layer lining layer, the pressure reduction layer is arranged between the double-layer lining layer and the double-layer lining layer, and dynamic loads caused by fluctuation of internal pressure of the gas storage are relieved through telescopic deformation of the pressure reduction layer, so that the risk that the lining layers crack is reduced, the service life of the underground gas storage chamber is prolonged, the advantages of reducing pressure and improving heat transfer are achieved, and the service life of the underground gas storage chamber is prolonged. And requirements of design on geology are reduced, and popularization and application are facilitated.

The invention discloses an underground gas storage gas monitoring method and system based on optical fiber spectrum analysis. The method comprises the following steps: S1, optical fiber network deployment: arranging a corrosion-resistant optical fiber sensor network in a gas storage; s2, spectral data acquisition: transmitting light with a specific wavelength to a gas chamber at the tail end of an optical fiber through a Fourier transform infrared spectrometer, and acquiring a transmitted spectrum after interaction of gas and light; s3, spectrum decoupling and concentration calculation: based on a peak pattern fitting algorithm of the Lambert-Beer law, decoupling the infrared spectrum characteristics of the mixed gas, matching a standard spectrum database, and calculating the concentration of each gas component; s4, constructing a three-dimensional gas model: according to the position of the optical fiber sensor and the gas concentration data, establishing a gas migration model to predict a leakage position and a movement direction; according to the method, the trend, the component distribution, the concentration change and the potential leakage risk of the gas in the storage are effectively evaluated, and technical support is provided for the safety, the effectiveness and the economical efficiency of operation of the gas storage.

Disclosed is a physical simulation experiment system for vapor-liquid multiphase seepage in an underground gas storage facility in a depleted gas reservoir, including: a rock sample sealing, heating, and insulation system, a triaxial stress and confining pressure loading system, an oil-gas-water injection and pore pressure supply system, a vapor-liquid-solid three-phase separation and measurement system, an optical micro / nanofiber gas detection and monitoring system, a distributed fiber optic sensing system, and a gas supply and leakage alarm system, where the rock sample sealing, heating, and insulation system is used for accommodating and heating a rock sample; and the oil-gas-water injection and pore pressure supply system performs oil-gas-water injection into the rock sample and pore pressure maintenance. The present application aims to overcome the bottleneck problem of evaluating the dynamic sealing integrity of underground gas storage under alternating loads caused by injection and withdrawal.

The utility model discloses a combined lining structure of an underground gas storage. The combined lining structure comprises a plurality of linings and a plurality of buffer devices, wherein the number of the buffer devices is the same as that of the linings; the multiple linings are sequentially arranged on the inner wall of the underground gas storage cavern in the circumferential direction of the underground gas storage cavern, and buffering seams are reserved between the adjacent linings. Each buffering device is arranged at one buffering seam and comprises a bent buffering piece and two fixing pieces; the two ends of the buffering piece are connected with the two adjacent linings in a sealed mode through fixing pieces respectively. The buffering seams are arranged between the adjacent linings, and the buffering devices are used in a combined mode, so that during gas storage, gas pressure borne by the fragmented linings is transmitted to external surrounding rock, tension fracture damage of the linings is avoided, and the compression performance of the linings is remarkably improved; when the gas is released, the adjacent linings are mutually squeezed to form a stressed whole, instability damage is avoided, the service life of the underground gas storage can be remarkably prolonged, and the safety of the underground gas storage can be remarkably improved.

The invention provides high-toughness micro-expansive cement paste suitable for high-temperature well cementation. The cement paste comprises the following raw materials in parts by weight: 60-90 parts of G-grade oil well cement, 20-40 parts of an active material, 3-12 parts of a high-performance toughening agent, 3-10 parts of nano oxide, 0.5-5 parts of an expanding agent, 3-5 parts of a chemical exciting agent, 1-3 parts of a high-temperature fluid loss agent, 0.5-3 parts of a high-temperature retarder and 0.1-1 part of a dispersing agent, and 0.2-1 part by weight of a defoaming agent. By adding the active material, the high-performance toughening agent, the nano oxide and the expanding agent, the high-temperature resistance and toughness of the cement paste, the cementation quality of a cement sheath and the like are improved; through the combined action of the four components, the high-temperature resistance, toughness and surrounding rock interface cementation performance of the cement are comprehensively improved; and the cement paste is matched with other components for use, so that the cement paste has the advantages of good stability, low water loss, good rheological property and the like, is suitable for underground gas storage well cementation, can improve the well cementation quality of a stratum sealing section, and ensures the sealing integrity of a cement sheath under frequent injection and production.

The invention discloses an optimal reservoir building horizon site selection method for a multi-layer water-bearing gas reservoir underground gas storage. The method comprises the following steps: performing reservoir feature evaluation on each layer in a target gas reservoir; analyzing a reservoir cover system by utilizing the relationship between the lithologic configuration relationship of two sides of the fault and the fault mud ratio, and evaluating the change of a three-dimensional stress field under the injection-production pressure disturbance; from the perspective of production dynamics, historical data of a target gas reservoir are researched for productivity analysis, the water invasion amount and the gas-water ratio are calculated layer by layer, fine description and quantitative characterization are performed on the water invasion dynamics, and the gas-water distribution and migration conditions are determined; and finally, carrying out comprehensive evaluation, and selecting an optimal library building horizon. From two aspects of reservoir geologic characteristics and production dynamics, quantitative analysis and evaluation are carried out on all layers and small layers of the target gas reservoir, then the optimal target layer position can be relatively accurately selected, the reservoir building operation effect is good, the oil ring damage degree is small, and bottom water invasion can be effectively blocked.

The invention discloses a leakproofness evaluation method and device for XAI gas stored in an underground gas storage. The method comprises the following steps: acquiring set parameters obtained by performing an XAI air tightness test and a rock core mechanical test on a rock sample of a surrounding rock layer of the underground gas storage; the set parameters are substituted into a fluid-solid coupling model, and the leakage range of the gas storage after the set operation time is obtained through simulation; according to the leakage range, the cavity size, the temperature and the pressure of the gas storage and the thickness and the porosity of each stratum, the leakage volume is determined; according to the leakage range and the leakage volume, the sealing performance of the XAI gas stored in the gas storage is evaluated. According to the method, the leakage range of the high-pressure XAI gas in the surrounding rock stratum of the underground gas storage can be quantitatively predicted through an experiment and simulation calculation method, reasonable evaluation of the sealing performance of the gas storage is achieved, and the method has important guiding significance on design and construction of a gas storage project.

The invention provides a gas reservoir gas storage injection-production optimization method based on block pressure balance control. The method comprises the following steps: acquiring target gas reservoir basic data; establishing a gas reservoir gas storage production operation dynamic optimization model objective function; constructing a gas reservoir gas storage production operation dynamic optimization model constraint condition; and solving the gas reservoir gas storage production operation dynamic optimization model, and generating a gas reservoir gas storage optimization injection-production scheme. On the basis of the injection-production scheduling optimization problem of the multi-block gas reservoir type underground gas storage, the corresponding optimization model is established with the purpose of minimizing the pressure difference degree between the gas reservoir blocks in the injection-production process, and the injection-production scheduling scheme is successfully solved through the established optimization model and the solving method. According to the method, the deviation degree of the formation pressure between the blocks can be effectively reduced under the condition that the requirement for the gas injection and production amount of the gas storage is met, extreme high-pressure blocks can be effectively avoided, and safe and stable operation of the gas storage is further guaranteed.

The invention relates to the field of underground engineering, in particular to a compressed air energy storage underground cavern supporting structure and a design method thereof. The invention provides a compressed air energy storage underground cavern supporting structure and a design method thereof, the compressed air energy storage underground cavern supporting structure is suitable for compressed air energy storage underground gas storage cavern structure design, the supporting structure enables deformation of all layers to be coordinated through structure simplification, decomposition of functions of all the layers, targeted selection of materials and design of structures of all the layers, the bearing capacity of surrounding rock can be fully utilized, and the supporting structure can be used for supporting the underground cavern. And meanwhile, the sealing performance of the cavern is ensured. Compared with an existing structure, the structure is not provided with a secondary lining and a thick steel lining, and economical efficiency is greatly improved.

The invention provides a sealing plug, an underground gas storage and a construction method of the underground gas storage. The sealing plug comprises a body, a force bearing structure arranged outside the body in a sleeving mode and a retaining wall arranged on one axial end side of the body and the force bearing structure, the body is a cone frustum, the force bearing structure is provided with a first layer and a second layer from inside to outside, the first layer is attached to the outer surface of the body, and the second layer is attached to the outer surface of the body. A first contact surface and a second contact surface are arranged on the outer surface of the second layer, and an included angle is formed between the first contact surface and the second contact surface in the axial direction of the body. The sealing plug is designed to be of a variable cross-section structure, so that the sealing plug meets the requirements of high pressure, cyclic load and cyclic impact under the operation condition of the gas storage, the risk of structural instability is reduced, and the sealing plug is simple in structure, convenient to construct and higher in reliability.

The invention discloses a physical model test system of a gas storage structure capable of conveniently applying ground stress. The system comprises a gas storage chamber, the gas storage chamber comprises a sealing layer arranged in a cavity, and a longitudinal optical fiber sensor and an annular optical fiber sensor are pasted to the outer side of the sealing layer; a concrete lining layer is arranged on the periphery of the sealing layer, and a cylindrical steel bar pipe network is pre-embedded in the concrete lining layer; concrete surrounding rock is arranged on the periphery of the gas storage chamber, and a cubic reinforcing mesh used for applying ground stress is pre-buried in the concrete surrounding rock. The top end and the bottom end of the gas storage chamber communicate with a gas inlet pipeline and a gas outlet pipeline extending to the outer side of the concrete surrounding rock correspondingly. An air inlet of the air inlet pipeline is connected with an air compressor and a water pressure system, and the air compressor and the water pressure system are connected with the control system. According to the invention, the unused position change condition of each structural layer of the underground gas storage under the coupling action of internal force and external force can be reflected more truly.

The invention discloses an underground gas storage steel lining anticorrosive coating and a preparation method thereof, and belongs to the technical field of underground gas storage. The coating sequentially comprises a protective layer, a buffer layer, an impermeable layer and a wear-resistant layer from the surface of a steel lining to the outside; the protective layer is epoxy zinc-rich primer dispersed with microcapsules, each microcapsule comprises a shell layer and a core material wrapped by the shell layer, and the core material is composed of a corrosion inhibitor, a repairing agent and a surface modifier; the buffer layer is made of a polyurea elastomer, and the impermeable layer is made of a fluorocarbon resin / silanized graphene composite material; and the wear-resistant layer is made of an epoxy-organic silicon hybrid resin material reinforced by a SiC / Al2O3 composite filler. The anticorrosive coating for the steel lining of the underground gas storage has a self-repairing function, coating cracking caused by deformation of a base material can be avoided, the comprehensive anticorrosive performance is high, and the requirement for the high-pressure, high-humidity, high-low-temperature and dynamic-load composite environment is met.

The utility model discloses a gas storage tunnel transformed based on a waste chamber of a hydropower station, which belongs to the technical field of underground energy storage and comprises a backfill concrete layer, a reinforced concrete lining and a flexible concrete sealing layer which are sequentially poured on a surrounding rock of a chamber wall, and the cross section of the inner wall of the backfill concrete layer is circular. A plurality of water drainage floral tubes are arranged on the inner wall of the chamber at intervals in the circumferential direction of the chamber, the length direction of the water drainage floral tubes is consistent with the length direction of the chamber, the water drainage floral tubes penetrate through the two ends of the whole chamber, and a plurality of through holes are evenly distributed in the wall of each water drainage floral tube. During operation, the air tightness of the gas storage tunnel can be fed back through the exhaust condition in the drainage floral tube, meanwhile, external pressure water can be collected and discharged through the drainage floral tube, and damage to a lining of the gas storage tunnel is avoided; the flexible concrete sealing layer not only can adapt to deformation of the inner wall of the chamber caused by internal air pressure, but also can play a sealing role, so that the abandoned chamber of the hydropower station can be used as an underground gas storage of a compressed air energy storage power station.

The invention relates to the technical field of natural gas underground storage, gas reservoir engineering and indoor experiments, and particularly discloses a method and device for calculating the gas storage capacity of an aquifer gas storage. Dividing the pore volume occupied by the gas reservoir reserves of the water-bearing stratum underground gas storage into accumulated water yield, water body elastic compression amount, the pore volume contributed by rock pore swelling amount and the volume of gas dissolved in formation water; calculating cumulative water yield, residual water elastic compression amount, pore volume contributed by rock pore swelling amount and volume of gas dissolved in formation water in sequence; and according to the pore volume of gas storage and the volume of gas dissolved in formation water, the gas storage capacity of the aquifer gas storage under the set injection-production pressure condition is determined. According to the method provided by the invention, the calculation precision of the gas storage capacity of the aquifer gas storage is greatly improved.

The invention provides a gas storage gas injection scheduling optimization method and system based on an improved Harris eagle algorithm. The method comprises the following steps: acquiring pipeline data and ground data of an underground gas storage; an underground gas storage gas injection scheduling model is constructed based on pipeline data and ground data of an underground gas storage, the underground gas storage gas injection scheduling model comprises definition of an objective function and setting of constraint conditions, and the objective function comprises compressor unit operation cost and gas storage storage cost. The constraint conditions comprise node constraint, pipeline constraint, compressor unit constraint and gas storage constraint; and solving the gas injection scheduling model of the underground gas storage by improving the Harris eagle algorithm so as to determine the optimal gas injection scheduling strategy of the underground gas storage. The underground gas storage gas injection scheduling model constructed by the invention reduces the operation cost of the gas storage, improves the economic profit and the operation efficiency, can adapt to different requirements and market conditions, and has very high practical value and economic benefit.

The invention provides an underground gas storage chamber with a drainage structure and a compressed air energy storage system, and relates to the technical field of storage chamber drainage, the underground gas storage chamber comprises a chamber, a drainage assembly, a guide assembly, a gas supply pipeline and a water pumping pipeline, the bottom of the gas supply pipeline is connected with the top end of the chamber, and a bottom plate is laid at the bottom of the chamber; a flow guide channel is formed in the bottom of the bottom plate, one end of the flow guide channel is connected with a water pumping pipeline, a water drainage assembly is installed on the edge of the bottom of the chamber, and a butt joint pipeline is embedded in the middle of the bottom of the chamber. According to the underground chamber, the overall protection effect on the underground chamber is improved, whether fracture and permeation occur on the inner wall of the underground chamber or not can be monitored only through single sensor equipment, the collapse phenomenon on the inner wall of the underground chamber is avoided, safety is improved, and the maintenance and repair period is prolonged.

The invention belongs to the technical field of geological energy storage, and particularly provides an underground chamber surrounding rock thermal-mechanical coupling fatigue phase field simulation method and system, and the method comprises the steps: building a phase field evolution equation through a phase field fracture model and a fatigue degradation function; on the basis of the calculation model, according to the air temperature and pressure in the cavern, the Newton heat exchange law is adopted to calculate cavern wall heat exchange, and a cavern wall heat conduction equation is constructed; on the basis of the calculation model, utilizing rock mass displacement and surrounding rock strain to construct a rock mass deformation equation; performing numerical discretization on the phase field evolution equation, the cave wall heat conduction equation and the rock mass deformation equation on a finite element grid unit, and performing thermal-mechanical coupling solution on all discretized equations through an iterative method to obtain evolution results of a temperature field, a stress field, a displacement field and a crack phase field of the underground chamber surrounding rock target area. According to the method, the phase field method is applied to thermal-mechanical coupling simulation of the underground gas storage chamber surrounding rock crack propagation condition, and the authenticity of chamber crack simulation is reflected to the maximum extent.

The invention provides a compressed air energy storage underground air storage device and a construction method thereof, and relates to the technical field of underground air storage, the compressed air energy storage underground air storage device comprises two air storage layers, the two air storage layers are buried underground in a U shape, the two air storage layers are in butt joint to form a square, a transverse channel is arranged between the two butt joint ends of the two air storage layers, and the transverse channel is communicated with the air storage layers. Compared with the prior art, the U-shaped gas storage layer is separated by the overhaul layer, the first gas inlet pipe and the first gas outlet pipe in each section are communicated with the second gas inlet pipe and the second gas outlet pipe, and under the action of the driving assembly, the gas storage layer is driven by the driving assembly to rotate, so that the gas storage layer can be maintained, and the service life of the gas storage layer is prolonged. The gas charging stage and the gas discharging stage can be independently carried out in each section of gas storage layer, pressure values in other gas chambers cannot be affected, alternate opening and closing can be carried out, gas is charged or discharged according to needs, and the stability of the gas storage layer is kept.

The invention relates to the technical field of compressed air energy storage, and discloses a compressed air energy storage underground gas storage sealing layer steel plate joint structure and a design method. The compressed air energy storage underground gas storage sealing layer steel plate connector structure comprises an arc-shaped connector and deformation filler. The deformation filler is located between the arc-shaped connector and a slippage layer of the underground gas storage. The joint structure is a reciprocating telescopic joint structure, is arranged in the annular direction of a sealing layer steel plate of the underground gas storage and is used for coordinating annular tensile deformation of the sealing layer steel plate when the underground gas storage is inflated and longitudinal compression deformation of the sealing layer steel plate under the action of high pressure and high temperature. The joint structure adopts an adjustable telescopic design, and can effectively adapt to deformation caused by high-pressure gas, periodic temperature change and geological condition difference during operation of the gas storage, so that stress accumulation in the steel plate is released, permanent deformation of a material is prevented, and the long-term stability of a sealing interface is guaranteed.

The application provides a kind of stability discrimination method of underground gas storage cavern initial support of compressed air energy storage power station, the method comprises: considering the expansion force and softening of hydrophilic surrounding rock of underground gas storage cavern, draw the response curve of surrounding rock in humidification process;Obtain the supporting parameters of underground gas storage cavern, calculate and draw the characteristic curve of supporting structure;The intersection point of the response curve of surrounding rock and the characteristic curve of supporting structure is determined, and the coordinate of the intersection point is obtained according to the coordinate of the intersection point, and the equilibrium supporting force of hydrophilic surrounding rock and supporting balance is obtained according to the coordinate of the intersection point;According to the safety factor of underground gas storage cavern, the stability of the cavern is judged according to the safety factor.The application fully considers the expansion force, softening and supporting force effect of surrounding rock in the relationship between surrounding rock and support, and uses safety factor as the stability index of underground gas storage cavern, which is suitable for the stability evaluation of underground cavern with complex surrounding rock characteristics, and the discrimination method is accurate and efficient.

The artificial underground gas storage system for the compressed air energy storage power station comprises a traffic inclined shaft, one end of the traffic inclined shaft penetrates through the ground, the other end of the traffic inclined shaft is connected with an arc-shaped connecting section, the other end of the arc-shaped connecting section is connected with a gas storage unit, the gas storage unit is connected with a traffic vertical shaft, and the other end of the traffic vertical shaft penetrates through the ground. And a gas conveying unit is arranged in the traffic shaft and is communicated with the gas storage unit. The invention further discloses a construction method of the artificial underground gas storage system for the compressed air energy storage power station. According to the artificial underground gas storage system for the compressed air energy storage power station and the construction method, the problem that the application range of compressed air energy storage is limited due to the fact that an existing underground gas storage technology mainly utilizes a salt cavern and a waste mine cave for transformation is solved.

The invention relates to an air compression energy storage method and system based on liquid pressure control, which can improve the energy storage capacity of compressed air energy storage under the condition that the volume of an underground cavity is not increased by means of the action of liquid for pressure control in the underground cavity. The technical problems that in the prior art, the energy storage capacity can only be improved by increasing the size of the underground gas storage cavity, and site selection is difficult and cost is high when the size of the underground gas storage cavity is increased are solved. Moreover, the liquid is injected into the underground cavity, so that the pressure of the underground cavity is kept stable in the energy storage and release processes, on one hand, the energy storage capacity is improved, and on the other hand, the influence of pressure circulation fluctuation on the integrity of the underground cavity is reduced.

The invention discloses an underground gas storage pile foundation energy comprehensive utilization system which comprises a compressed air preparation module, an underground gas storage pile energy storage module, a heat recycling module and an expansion power generation module, the compressed air preparation module comprises a compressor unit and a cooler, and the compressed air preparation module is used for preparing and cooling compressed air; the underground air storage pile energy storage module comprises one or more underground air storage piles, and the underground air storage piles are used for storing normal-temperature high-pressure compressed air; the expansion power generation module comprises a turbine expansion unit and a power generator, and the turbine expansion unit is used for expanding the normal-temperature high-pressure compressed air so as to drive the power generator to generate power; the heat recycling module is used for recycling heat and cold generated in the air compression process or expansion process, a pressure-resistant sealed space is constructed in a pile body to store compressed air, and the heat recycling module and a rock-soil body auxiliary heat exchange loop are arranged, so that heat-electricity-cold combined supply and multi-energy collaborative management of a building are achieved.

The invention provides a system of a pumped storage coupled compressed air energy storage underground gas storage with an air cushion type surge shaft and an operation method. The system comprises a compressed air energy storage system and a pumped storage system. The interior of the water-gas co-containing bin is divided into an upper-layer gas storage chamber and a lower-layer water storage chamber through a flexible material. The air inlet end of the compression system is communicated with the second air path; the air outlet end of the compression system is connected to the air inlet of the upper-layer air storage chamber through a first air path; a first air valve is mounted on the first air path; a gas outlet of the upper-layer gas storage chamber is connected to the expansion unit through a third gas path, and a second gas valve is mounted on the third gas path; and a detection sensor is mounted in the water-gas co-containing bin. The stability and economical efficiency of the compressed air energy storage are improved, the compressed air utilization rate is increased, the combined operation mode of compressed air energy storage and pumped storage is simplified, the combined dispatching mode of novel energy storage is optimized, and then the safety and reliability of pumped storage are improved.

The invention discloses a compressed air energy storage system power station arrangement method based on a waste salt cavern gas storage, and belongs to the technical field of novel energy storage in the electric power engineering industry, selection of ground power station sites, location of underground waste salt caverns, land use properties of available land around the salt caverns, short-term and long-term planning of local areas and the like. And by considering the terrain and geological conditions of the available land, selecting a geological condition land suitable for power station construction and a ground site planning capacity with regular available land boundary and matched with the effective volume of the underground salt cavern gas storage and the internal pressure of the cavity. According to the technical characteristics of a compressed air energy storage system, air is compressed and stored in a salt cavern through surplus electric power of a wave trough, and high-pressure air is released at a wave crest to push an expansion machine to generate electricity, so that on-site consumption of abandoned wind and abandoned light and peak clipping and valley filling of electric power can be realized; the ground power station serves as an equipment facility for realizing electricity storage and discharge processes, and the ground power station and the ground power station interact to jointly realize the whole electricity storage and discharge processes.