Compressed air energy storage system, compressed air energy storage air inlet adjusting method, device and equipment, storage medium and program product

Abstract

The invention relates to a compressed air energy storage system, a compressed air energy storage air inlet adjusting method, device and equipment, a storage medium and a program product, and relates to the technical field of novel energy storage. The system can solve the problem that energy loss is large in the pressure relief process of the gas storage tank. The system comprises a compressor, a high-pressure gas storage tank, a sub-high-pressure gas storage tank, a high-pressure expansion machine, a sub-high-pressure expansion machine and a generator. The compressor is connected with the high-pressure gas storage tank, the high-pressure gas storage tank is connected with the secondary high-pressure gas storage tank and the high-pressure expansion machine, the secondary high-pressure gas storage tank is connected with the secondary high-pressure expansion machine, and the high-pressure expansion machine and the secondary high-pressure expansion machine are connected with the generator; the compressor compresses air to a high-pressure state and stores the air in the high-pressure air storage tank. The high-pressure gas storage tank releases high-pressure gas to enter the secondary high-pressure gas storage tank and releases the high-pressure gas to enter the high-pressure expansion machine to do work; the secondary high-pressure gas storage tank releases secondary high-pressure gas to enter the secondary high-pressure expansion machine to do work; the high-pressure expansion machine and the sub-high-pressure expansion machine are used for rotating and driving the generator to generate electricity.

Description

Technical Field

[0001] The present application relates to the field of new energy storage technologies, and particularly to a compressed air energy storage system, a compressed air energy storage intake air regulation method, device, computer equipment, computer-readable storage medium, and computer program product. Background Art

[0002] Compressed air energy storage is a large-scale energy storage technology that compresses and stores air and releases the air for power generation when needed. This technology is mainly used to balance power supply and demand, improve power grid stability, and utilization rate of renewable energy. During the low electricity consumption period, an electric motor drives a compressor to compress air and store it in a gas storage tank, and during the high electricity consumption period, the compressed air is released and expanded to drive a generator to generate electricity. It has the advantages of large energy storage scale, long energy storage time, short construction time, and low construction cost.

[0003] The compressed air energy storage in traditional technologies adopts a combustion-assisted type, with low efficiency and combustion pollution. Currently, most domestic compressed air energy storage systems adopt an adiabatic type, which stores the heat generated during the compression process and utilizes it during the expansion stage. Although the energy storage efficiency is improved compared with traditional technologies, there are still problems of large energy losses. Summary of the Invention

[0004] Based on this, in view of the above technical problems, it is necessary to provide a compressed air energy storage system, a compressed air energy storage intake air regulation method, device, computer equipment, computer-readable storage medium, and computer program product.

[0005] In a first aspect, the present application provides a compressed air energy storage system, which includes: a compressor, a high-pressure gas storage tank, a sub-high-pressure gas storage tank, a high-pressure expander, a sub-high-pressure expander, and a generator; the compressor is connected to the high-pressure gas storage tank, the high-pressure gas storage tank is respectively connected to the sub-high-pressure gas storage tank and the high-pressure expander, the sub-high-pressure gas storage tank is connected to the sub-high-pressure expander, and the high-pressure expander and the sub-high-pressure expander are respectively connected to the generator;

[0006] The compressor is configured to compress air to a high-pressure state and store it in the high-pressure gas storage tank;

[0007] The high-pressure gas storage tank is configured to release high-pressure gas into the sub-high-pressure gas storage tank and release high-pressure gas to do work in the high-pressure expander;

[0008] The sub-high-pressure gas storage tank is configured to release sub-high-pressure gas to do work in the sub-high-pressure expander;

[0009] The high-pressure expander and the sub-high-pressure expander are configured to rotate and drive the generator to generate electricity.

[0010] In one embodiment, the system further includes: a first heat exchanger, a second heat exchanger, and a third heat exchanger. The first heat exchanger is connected in series between the compressor and the high-pressure gas storage tank. The second heat exchanger is connected in series between the high-pressure gas storage tank and the high-pressure expander. The third heat exchanger is connected in series between the sub-high-pressure gas storage tank and the sub-high-pressure expander;

[0011] The first heat exchanger, the second heat exchanger, and the third heat exchanger are all used for heat energy management during the air compression and expansion processes.

[0012] In one embodiment, the system further includes: a heat storage device, which is respectively connected to the first heat exchanger, the second heat exchanger, and the third heat exchanger;

[0013] The heat storage device is used to store the heat transferred by the first heat exchanger and provide the stored heat to the second heat exchanger and the third heat exchanger.

[0014] In one embodiment, the high-pressure gas storage tank is further used to release the high-pressure gas into the sub-high-pressure gas storage tank until the air pressure in the high-pressure gas storage tank drops to the first rated working air pressure of the high-pressure expander;

[0015] The high-pressure gas storage tank is further used to release the high-pressure gas into the high-pressure expander to do work until the air pressure in the high-pressure gas storage tank drops from the first rated working air pressure to the second rated working air pressure of the sub-high-pressure expander, and then stop releasing the high-pressure gas.

[0016] In one embodiment, the sub-high-pressure gas storage tank is further used to start releasing the sub-high-pressure gas into the sub-high-pressure expander to do work when the high-pressure gas storage tank stops releasing the high-pressure gas until the air pressure in the sub-high-pressure gas storage tank drops from the second rated working air pressure to the atmospheric pressure.

[0017] In a second aspect, the present application further provides a method for regulating the intake air of compressed air energy storage, which is applied to a compressed air energy storage system. The method includes:

[0018] In response to a power generation instruction for the compressed air energy storage system, the high-pressure gas storage tank releases high-pressure gas into the sub-high-pressure gas storage tank until the air pressure in the high-pressure gas storage tank drops to the first rated working air pressure of the high-pressure expander;

[0019] The high-pressure gas storage tank releases the high-pressure gas into the high-pressure expander to do work until the air pressure in the high-pressure gas storage tank drops from the first rated working air pressure to the second rated working air pressure of the sub-high-pressure expander, and then stop releasing the high-pressure gas;

[0020] The secondary high-pressure gas is released from the secondary high-pressure gas storage tank into the secondary high-pressure expander to do work until the gas pressure in the secondary high-pressure gas storage tank decreases from the second rated working pressure to the atmospheric pressure.

[0021] In a third aspect, the present application further provides a compressed air energy storage intake air regulation device, including:

[0022] A power generation preparation module, configured to respond to a power generation instruction for a compressed air energy storage system, and release high-pressure gas from a high-pressure gas storage tank into a secondary high-pressure gas storage tank until the gas pressure in the high-pressure gas storage tank decreases to the first rated working pressure of a high-pressure expander;

[0023] A primary power generation module, configured to release the high-pressure gas from the high-pressure gas storage tank into the high-pressure expander to do work until the gas pressure in the high-pressure gas storage tank decreases from the first rated working pressure to the second rated working pressure of a secondary high-pressure expander, and then stop releasing the high-pressure gas;

[0024] A secondary power generation module, configured to release secondary high-pressure gas from the secondary high-pressure gas storage tank into the secondary high-pressure expander to do work until the gas pressure in the secondary high-pressure gas storage tank decreases from the second rated working pressure to the atmospheric pressure.

[0025] In a fourth aspect, the present application further provides a computer device, including a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0026] Respond to a power generation instruction for a compressed air energy storage system, release high-pressure gas from a high-pressure gas storage tank into a secondary high-pressure gas storage tank until the gas pressure in the high-pressure gas storage tank decreases to the first rated working pressure of a high-pressure expander; release the high-pressure gas from the high-pressure gas storage tank into the high-pressure expander to do work until the gas pressure in the high-pressure gas storage tank decreases from the first rated working pressure to the second rated working pressure of a secondary high-pressure expander, and then stop releasing the high-pressure gas; release secondary high-pressure gas from the secondary high-pressure gas storage tank into the secondary high-pressure expander to do work until the gas pressure in the secondary high-pressure gas storage tank decreases from the second rated working pressure to the atmospheric pressure.

[0027] In a fifth aspect, the present application further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0028] In response to a power generation instruction for a compressed air energy storage system, high-pressure gas is released from a high-pressure gas storage tank into a sub-high-pressure gas storage tank until the gas pressure in the high-pressure gas storage tank drops to the first rated operating pressure of a high-pressure expander; the high-pressure gas is released from the high-pressure gas storage tank into the high-pressure expander to do work until the gas pressure in the high-pressure gas storage tank drops from the first rated operating pressure to the second rated operating pressure of a sub-high-pressure expander, and the release of the high-pressure gas is stopped; sub-high-pressure gas is released from the sub-high-pressure gas storage tank into the sub-high-pressure expander to do work until the gas pressure in the sub-high-pressure gas storage tank drops from the second rated operating pressure to atmospheric pressure.

[0029] In a sixth aspect, the present application further provides a computer program product, including a computer program which, when executed by a processor, implements the following steps:

[0030] In response to a power generation instruction for a compressed air energy storage system, high-pressure gas is released from a high-pressure gas storage tank into a sub-high-pressure gas storage tank until the gas pressure in the high-pressure gas storage tank drops to the first rated operating pressure of a high-pressure expander; the high-pressure gas is released from the high-pressure gas storage tank into the high-pressure expander to do work until the gas pressure in the high-pressure gas storage tank drops from the first rated operating pressure to the second rated operating pressure of a sub-high-pressure expander, and the release of the high-pressure gas is stopped; sub-high-pressure gas is released from the sub-high-pressure gas storage tank into the sub-high-pressure expander to do work until the gas pressure in the sub-high-pressure gas storage tank drops from the second rated operating pressure to atmospheric pressure.

[0031] For the above-mentioned compressed air energy storage system, compressed air energy storage intake air regulation method, device, computer equipment, computer-readable storage medium and computer program product, by setting two gas storage tanks with different pressures (a high-pressure gas storage tank and a sub-high-pressure gas storage tank), connecting a high-pressure expander and a sub-high-pressure expander with different rated operating pressures respectively, and flexibly mixing the high-pressure gas in the high-pressure gas storage tank and the sub-high-pressure gas storage tank, that is, by adding a set of sub-high-pressure gas storage tanks to absorb the energy during the pressure relief process of the high-pressure gas, and dividing the expansion power generation process into two different pressure stages to carry out, effectively avoiding the energy loss caused by pressure relief, and the two gas storage tanks are respectively connected to different expanders, which can increase the work efficiency of the expander, thereby improving the work depth of the compressed air energy storage system, solving the problem of large energy loss during the pressure relief process of the adiabatic compressed air energy storage, and effectively improving the power generation flexibility and energy storage efficiency of the compressed air energy storage system. Description of the Drawings

[0032] To more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the following will briefly introduce the drawings required for use in the description of the embodiments of the present application or the related art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0033] Figure 1 It is a structural block diagram of a compressed air energy storage system in one embodiment;

[0034] Figure 2 It is a structural block diagram of a compressed air energy storage system in another embodiment;

[0035] Figure 3 It is a structural block diagram of a compressed air energy storage system in still another embodiment;

[0036] Figure 4 It is a schematic flowchart of a compressed air energy storage intake air regulation method in one embodiment;

[0037] Figure 5 It is a structural block diagram of a compressed air energy storage intake air regulation device in one embodiment;

[0038] Figure 6 It is an internal structure diagram of a computer device in one embodiment. Detailed implementation manners

[0039] In order to make the purpose, technical solutions and advantages of the present application clearer, the following further details the present application in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0040] In current adiabatic compressed air energy storage, air is mainly compressed to a high pressure state (10 MPa) by a compressor and stored in a gas storage tank, and then the high-pressure gas in the gas storage tank drives an expander to rotate and do work. Generally, the rated inlet pressure of the expander is set at about 7 - 8 MPa. Since the pressure in the gas storage tank is greater than the rated inlet pressure of the expander initially, it is necessary to relieve the pressure in the gas storage tank. The pressure in the gas storage tank is adjusted to the rated inlet pressure of the expander through a pressure relief valve, and energy loss will occur during the pressure relief process. Subsequently, as the expander further does work, the pressure in the gas storage tank gradually decreases below the rated inlet pressure of the expander, resulting in a decrease in the work efficiency of the expander.

[0041] In response to this, the present application avoids energy loss caused by throttling pressure relief by setting two gas storage tanks with different pressures and flexibly mixing the high-pressure gas in the high-pressure gas storage tank and the sub-high-pressure gas storage tank. In addition, the two gas storage tanks are respectively connected to different expanders, which can increase the work efficiency of the expander and improve the work depth of the compressed air energy storage system.

[0042] In one embodiment, as Figure 1 shown, a compressed air energy storage system is provided, which includes: a compressor, a high-pressure gas storage tank, a sub-high-pressure gas storage tank, a high-pressure expander, a sub-high-pressure expander, and a generator; the compressor is connected to the high-pressure gas storage tank, the high-pressure gas storage tank is respectively connected to the sub-high-pressure gas storage tank and the high-pressure expander, the sub-high-pressure gas storage tank is connected to the sub-high-pressure expander, and the high-pressure expander and the sub-high-pressure expander are respectively connected to the generator;

[0043] The compressor is used to compress air to a high-pressure state and store it in the high-pressure gas storage tank;

[0044] The high-pressure gas storage tank is used to release high-pressure gas into the sub-high-pressure gas storage tank and release high-pressure gas into the high-pressure expander for work;

[0045] The sub-high-pressure gas storage tank is used to release sub-high-pressure gas into the sub-high-pressure expander for work;

[0046] The high-pressure expander and the sub-high-pressure expander are used to rotate and drive the generator to generate electricity.

[0047] Specifically, in the Figure 1 shown compressed air energy storage system, the rated working pressure of the high-pressure expander is 8 Mpa, and it is connected to the high-pressure gas storage tank (10 Mpa); the rated working pressure of the sub-high-pressure expander is 4 Mpa, and it is connected to the sub-high-pressure gas storage tank (4 Mpa). In the expansion power generation stage, the high-pressure gas is first released from the high-pressure gas storage tank into the sub-high-pressure gas storage tank until the gas pressure in the high-pressure gas storage tank drops to 8 Mpa (at this time, the gas pressure in the sub-high-pressure gas storage tank will increase to 4 Mpa), and then the high-pressure gas enters the high-pressure expander for work. When the gas pressure in the high-pressure tank drops to 4 Mpa during the work, it switches to the sub-high-pressure gas storage tank to release the sub-high-pressure gas into the sub-high-pressure expander to continue working. The sub-high-pressure gas storage tank is directly connected to the sub-high-pressure expander for work, so as to effectively utilize the pressure relief loss between 10 Mpa and 8 Mpa in the high-pressure gas storage tank and improve the work efficiency and work depth of the gas.

[0048] The above compressed air energy storage system sets two groups of gas storage tanks with different pressures (a high-pressure gas storage tank and a sub-high-pressure gas storage tank), which are respectively connected to a high-pressure expander and a sub-high-pressure expander with different rated working air pressures, and flexibly mixes the high-pressure gas in the high-pressure gas storage tank and the sub-high-pressure gas storage tank. That is, by adding a group of sub-high-pressure gas storage tanks to absorb the energy during the pressure relief process of the high-pressure gas, and dividing the expansion power generation process into two different pressure sections, effectively avoiding the energy loss caused by pressure relief. And the two groups of gas storage tanks are respectively connected to different expanders, which can increase the work efficiency of the expanders, thereby improving the work depth of the compressed air energy storage system, solving the problem of large energy loss during the pressure relief process of the adiabatic compressed air energy storage, and effectively improving the power generation flexibility and energy storage efficiency of the compressed air energy storage system.

[0049] In one embodiment, as Figure 2 shown, the compressed air energy storage system further includes: a first heat exchanger, a second heat exchanger, and a third heat exchanger. The first heat exchanger is connected in series between the compressor and the high-pressure gas storage tank, the second heat exchanger is connected in series between the high-pressure gas storage tank and the high-pressure expander, and the third heat exchanger is connected in series between the sub-high-pressure gas storage tank and the sub-high-pressure expander; the first heat exchanger, the second heat exchanger, and the third heat exchanger are all used for heat energy management during the air compression or expansion process.

[0050] Among them, the heat exchanger optimizes the air compression and expansion processes through heat energy management in the compressed air energy storage system, ensuring the efficiency of the system and the safety of the equipment; its specific functions include: cooling the compressed air during the charging stage, and heating the expanded air during the discharging stage.

[0051] Specifically, during the compression charging stage, the first heat exchanger transfers the heat to the cooling medium (such as water or air) after the air is compressed, thereby reducing the air temperature so that the compressed air can be stored at an appropriate temperature. During the expansion power generation process, the second heat exchanger and the third heat exchanger transfer the heat in the external heat source (such as combustion gas or other heat sources) to the high-pressure gas, thereby increasing the air temperature, making the expansion process more efficient, reducing energy loss, and ensuring the normal operation of the expander.

[0052] In one embodiment, as Figure 3 shown, the compressed air energy storage system further includes: a heat storage device, which is respectively connected to the first heat exchanger, the second heat exchanger, and the third heat exchanger; the heat storage device is used to store the heat transferred by the first heat exchanger and provide the stored heat for the second heat exchanger and the third heat exchanger.

[0053] Among them, the heat storage device is a device that can store and release heat energy. Its main function is to store the heat energy in a certain medium for release when needed.

[0054] Specifically, during the compressed charging stage, the first heat exchanger and the third heat exchanger transfer heat to the heat storage device after air compression, thereby reducing the air temperature so that the compressed air can be stored at an appropriate temperature. During the expansion power generation process, the second heat exchanger and the third heat exchanger increase the air temperature by transferring the heat in the heat storage device to the high-pressure gas, making the expansion process more efficient, reducing energy loss, and ensuring the normal operation of the expander.

[0055] In one embodiment, the high-pressure gas storage tank is also used to release high-pressure gas into the sub-high-pressure gas storage tank until the gas pressure in the high-pressure gas storage tank drops to the first rated operating pressure of the high-pressure expander; the high-pressure gas storage tank is also used to release high-pressure gas into the high-pressure expander to do work until the gas pressure in the high-pressure gas storage tank drops from the first rated operating pressure to the second rated operating pressure of the sub-high-pressure expander, and then stop releasing high-pressure gas.

[0056] For example, the first rated operating pressure of the high-pressure expander can be 8 Mpa, and the second rated operating pressure of the sub-high-pressure expander can be 4 Mpa.

[0057] Specifically, during the expansion power generation stage, the high-pressure gas storage tank first releases high-pressure gas into the sub-high-pressure gas storage tank until the gas pressure in the high-pressure gas storage tank drops to 8 Mpa. At the same time, the gas pressure in the sub-high-pressure gas storage tank will increase to 4 Mpa. Then, release high-pressure gas into the high-pressure expander to do work. Stop releasing high-pressure gas when the gas pressure in the high-pressure tank drops to 4 Mpa. Switch to the sub-high-pressure gas storage tank to release sub-high-pressure gas into the sub-high-pressure expander to continue doing work. The sub-high-pressure gas storage tank is directly connected to the sub-high-pressure expander to do work, thereby effectively improving the work efficiency and work depth of the gas.

[0058] In one embodiment, the sub-high-pressure gas storage tank is also used to start releasing sub-high-pressure gas into the sub-high-pressure expander to do work when the high-pressure gas storage tank stops releasing high-pressure gas until the gas pressure in the sub-high-pressure gas storage tank drops from the second rated operating pressure to the atmospheric pressure.

[0059] Specifically, when it is recognized that the high-pressure gas storage tank stops releasing high-pressure gas, the sub-high-pressure gas storage tank starts to release sub-high-pressure gas into the sub-high-pressure expander to do work until the gas pressure in the sub-high-pressure gas storage tank drops from the second rated operating pressure to the atmospheric pressure.

[0060] In one embodiment, as Figure 4 shown, a compressed air energy storage intake air regulation method is provided. Taking the application of this method to the Figure 1 compressed air energy storage system as an example, it includes the following steps:

[0061] Step S401: In response to a power generation instruction for the compressed air energy storage system, high-pressure gas is released from the high-pressure gas storage tank into the sub-high-pressure gas storage tank until the air pressure in the high-pressure gas storage tank drops to the first rated operating air pressure of the high-pressure expander.

[0062] Step S402: High-pressure gas is released from the high-pressure gas storage tank into the high-pressure expander to do work until the air pressure in the high-pressure gas storage tank drops from the first rated operating air pressure to the second rated operating air pressure of the sub-high-pressure expander, and then the release of high-pressure gas stops.

[0063] Step S403: Sub-high-pressure gas is released from the sub-high-pressure gas storage tank into the sub-high-pressure expander to do work until the air pressure in the sub-high-pressure gas storage tank drops from the second rated operating air pressure to the atmospheric pressure.

[0064] Specifically, in response to a power generation instruction for the compressed air energy storage system, high-pressure gas is released from the high-pressure gas storage tank into the sub-high-pressure gas storage tank until the air pressure in the high-pressure gas storage tank drops to the first rated operating air pressure of the high-pressure expander; high-pressure gas is released from the high-pressure gas storage tank into the high-pressure expander to do work until the air pressure in the high-pressure gas storage tank drops from the first rated operating air pressure to the second rated operating air pressure of the sub-high-pressure expander, and then the release of high-pressure gas stops; sub-high-pressure gas is released from the sub-high-pressure gas storage tank into the sub-high-pressure expander to do work until the air pressure in the sub-high-pressure gas storage tank drops from the second rated operating air pressure to the atmospheric pressure.

[0065] For the specific limitations of the above steps, reference can be made to the relevant embodiments of the compressed air energy storage system, which will not be elaborated here.

[0066] In the above compressed air energy storage intake regulation method, by setting two gas storage tanks with different pressures (high-pressure gas storage tank and sub-high-pressure gas storage tank), connecting high-pressure expanders and sub-high-pressure expanders with different rated operating air pressures respectively, and flexibly mixing the high-pressure gas in the high-pressure gas storage tank and the sub-high-pressure gas storage tank, that is, by adding a set of sub-high-pressure gas storage tanks to absorb the energy during the pressure relief process of high-pressure gas, and dividing the expansion power generation process into two different pressure segments to carry out, effectively avoiding the energy loss caused by pressure relief, and the two gas storage tanks are respectively connected to different expanders, which can increase the work efficiency of the expanders, thereby improving the work depth of the compressed air energy storage system, solving the problem of large energy loss during the pressure relief process of the adiabatic compressed air energy storage in the gas storage tank, and effectively improving the power generation flexibility and energy storage efficiency of the compressed air energy storage system.

[0067] It should be understood that although the steps in the flowcharts involved in the above-described embodiments are sequentially shown according to the indications of the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear indication in this article, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-described embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be executed alternately or in turn with at least a part of the steps or stages in other steps or other steps.

[0068] Based on the same inventive concept, an embodiment of the present application further provides a compressed air energy storage intake air regulation device for implementing the above-mentioned compressed air energy storage intake air regulation method. The solution provided by this device to solve the problem is similar to the solution described in the above method. Therefore, the specific limitations in one or more embodiments of the following compressed air energy storage intake air regulation device can refer to the limitations on the compressed air energy storage intake air regulation method in the above text, and will not be repeated here.

[0069] In an exemplary embodiment, as Figure 5 shown, a compressed air energy storage intake air regulation device is provided, including:

[0070] A power generation preparation module 501, configured to, in response to a power generation instruction for a compressed air energy storage system, release high-pressure gas from a high-pressure gas storage tank into a sub-high-pressure gas storage tank until the air pressure in the high-pressure gas storage tank is reduced to the first rated operating air pressure of a high-pressure expander;

[0071] A primary power generation module 502, configured to release the high-pressure gas from the high-pressure gas storage tank into the high-pressure expander to do work until the air pressure in the high-pressure gas storage tank is reduced from the first rated operating air pressure to the second rated operating air pressure of a sub-high-pressure expander, and then stop releasing the high-pressure gas;

[0072] A secondary power generation module 503, configured to release sub-high-pressure gas from the sub-high-pressure gas storage tank into the sub-high-pressure expander to do work until the air pressure in the sub-high-pressure gas storage tank is reduced from the second rated operating air pressure to atmospheric pressure.

[0073] For the specific limitations of the compressed air energy storage intake air regulation device, reference may be made to the limitations of the compressed air energy storage intake air regulation method in the foregoing text, which will not be elaborated here. Each module in the above-mentioned compressed air energy storage intake air regulation device can be implemented in whole or in part by software, hardware, and their combination. Each of the above modules can be embedded in or independent of a processor in a computer device in the form of hardware, or stored in a memory in the computer device in the form of software, so as to facilitate the processor to call and execute the operations corresponding to each of the above modules.

[0074] In an exemplary embodiment, a computer device is provided. The computer device can be a terminal, and its internal structural diagram can be as Figure 6 shown. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit, and an input device. Among them, the processor, the memory, and the input / output interface are connected through a system bus, and the communication interface, the display unit, and the input device are connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used for exchanging information between the processor and external devices. The communication interface of the computer device is used for communicating with an external terminal in a wired or wireless manner. The wireless manner can be implemented through WIFI, a mobile cellular network, near field communication (NFC), or other technologies. The computer program, when executed by the processor, implements a compressed air energy storage intake air regulation method. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device, or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen. The input device of the computer device can be a touch layer covering the display screen, or a button, a trackball, or a touchpad provided on the outer shell of the computer device, or an external keyboard, a touchpad, or a mouse, etc.

[0075] Those skilled in the art can understand that Figure 6 the structure shown in

[0076] is only a block diagram of some structures related to the solution of this application, and does not constitute a limitation on the computer device to which the solution of this application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine some components, or have different component arrangements. In an embodiment, a computer device is further provided, including a memory and a processor. A computer program is stored in the memory, and when the processor executes the computer program, the steps in the above method embodiments are implemented.

[0077] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above method embodiments are implemented.

[0078] In one embodiment, a computer program product is provided, including a computer program. When the computer program is executed by a processor, the steps in the above method embodiments are implemented.

[0079] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use, and processing of relevant data need to comply with relevant regulations.

[0080] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, database, or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The databases involved in the embodiments provided in the present application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., and are not limited thereto. The processors involved in the embodiments provided in the present application can be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, data processing logics based on quantum computing, artificial intelligence (AI) processors, etc., and are not limited thereto.

[0081] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in the present application.

[0082] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A compressed air energy storage system, characterized in that, The system includes: a compressor, a high-pressure gas storage tank, a sub-high-pressure gas storage tank, a high-pressure expander, a sub-high-pressure expander, and a generator; the compressor is connected to the high-pressure gas storage tank, the high-pressure gas storage tank is respectively connected to the sub-high-pressure gas storage tank and the high-pressure expander, the sub-high-pressure gas storage tank is connected to the sub-high-pressure expander, and the high-pressure expander and the sub-high-pressure expander are respectively connected to the generator; The compressor is used to compress air to a high pressure state and store it in the high-pressure gas storage tank; The high-pressure gas storage tank is used to release high-pressure gas into the sub-high-pressure gas storage tank, and release high-pressure gas into the high-pressure expander to do work; The sub-high-pressure gas storage tank is used to release sub-high-pressure gas into the sub-high-pressure expander to do work; The high-pressure expander and the sub-high-pressure expander are used to rotate and drive the generator to generate electricity.

2. The system according to claim 1, characterized in that, The system further includes: a first heat exchanger, a second heat exchanger, and a third heat exchanger. The first heat exchanger is connected in series between the compressor and the high-pressure gas storage tank, the second heat exchanger is connected in series between the high-pressure gas storage tank and the high-pressure expander, and the third heat exchanger is connected in series between the sub-high-pressure gas storage tank and the sub-high-pressure expander; The first heat exchanger, the second heat exchanger, and the third heat exchanger are all used for heat energy management during the air compression or expansion process.

3. The system according to claim 2, wherein The system further includes: a heat storage device, and the heat storage device is respectively connected to the first heat exchanger, the second heat exchanger, and the third heat exchanger; The heat storage device is used to store the heat transferred by the first heat exchanger, and provide the stored heat for the second heat exchanger and the third heat exchanger.

4. The system according to any one of claims 1 to 3, characterized in that The high-pressure gas storage tank is further used to release the high-pressure gas into the sub-high-pressure gas storage tank until the air pressure in the high-pressure gas storage tank drops to the first rated working air pressure of the high-pressure expander; The high-pressure gas storage tank is further used to release the high-pressure gas into the high-pressure expander to do work until the air pressure in the high-pressure gas storage tank drops from the first rated working air pressure to the second rated working air pressure of the sub-high-pressure expander, and then stop releasing the high-pressure gas.

5. The system according to claim 4, wherein The sub-high-pressure gas storage tank is further used to start releasing the sub-high-pressure gas into the sub-high-pressure expander to do work when the high-pressure gas storage tank stops releasing the high-pressure gas, until the air pressure in the sub-high-pressure gas storage tank drops from the second rated working air pressure to the atmospheric pressure.

6. A compressed air energy storage intake air regulation method, characterized in that Applied to a compressed air energy storage system, the method includes: In response to a power generation instruction for the compressed air energy storage system, the high-pressure gas storage tank releases high-pressure gas into the sub-high-pressure gas storage tank until the air pressure in the high-pressure gas storage tank drops to the first rated working air pressure of the high-pressure expander; The high-pressure gas storage tank releases the high-pressure gas into the high-pressure expander to do work until the air pressure in the high-pressure gas storage tank drops from the first rated working air pressure to the second rated working air pressure of the sub-high-pressure expander, and then stop releasing the high-pressure gas; The sub-high-pressure gas storage tank releases sub-high-pressure gas into the sub-high-pressure expander to do work until the air pressure in the sub-high-pressure gas storage tank drops from the second rated working air pressure to the atmospheric pressure.

7. An intake air regulating device for compressed air energy storage, characterized in that, The device includes: A power generation preparation module, which is used to, in response to a power generation instruction for a compressed air energy storage system, release high-pressure gas from a high-pressure gas storage tank into a sub-high-pressure gas storage tank until the air pressure in the high-pressure gas storage tank drops to the first rated operating air pressure of a high-pressure expander; A primary power generation module, which is used to release the high-pressure gas from the high-pressure gas storage tank into the high-pressure expander to do work until the air pressure in the high-pressure gas storage tank drops from the first rated operating air pressure to the second rated operating air pressure of a sub-high-pressure expander, and then stop releasing the high-pressure gas; A secondary power generation module, which is used to release sub-high-pressure gas from the sub-high-pressure gas storage tank into the sub-high-pressure expander to do work until the air pressure in the sub-high-pressure gas storage tank drops from the second rated operating air pressure to atmospheric pressure.

8. A computer device, comprising a memory and a processor, the memory storing a computer program, characterized in that, When the processor executes the computer program, the steps of the method described in claim 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, the steps of the method described in claim 6 are implemented.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, the steps of the method described in claim 6 are implemented.

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