Air temperature control method and device for compressed air energy storage system

Abstract

The present application provides an air temperature control method and device for a compressed air energy storage system, which can be used in the field of electric energy storage technology. Based on this method, before specific implementation, the structure of the compression section in the compressed air energy storage system can be modified accordingly to make the compression section compatible with the subsequent air temperature control. During specific implementation, first obtain the current first temperature of the inlet air of the first-stage compressor; then use the preset first index temperature to detect whether the current first temperature meets the preset operating requirements; when it is determined that it does not meet the preset operating requirements, determine and adjust the rotary preheater, booster pump, first flow regulating valve, second flow regulating valve, and third flow regulating valve according to the target control scheme based on the current first temperature and the preset first index temperature. In this way, the waste heat of the compressor outlet air in the compression section of the compressed air energy storage system can be fully utilized to accurately adjust the temperature of the compressor inlet air.

Description

Technical Field

[0001] The present application relates to the field of electric energy storage technology, and in particular to an air temperature control method and device for a compressed air energy storage system. Background Art

[0002] With the development and popularization of renewable energy, compressed air energy storage systems have received increasing attention.

[0003] Compressed air energy storage systems typically consist of two sections: a compression section and an expansion section. The compression section typically consists of multiple compressors connected in series. During energy storage, these systems utilize excess electrical energy to compress air in the compressors in the compression section, converting the energy into heat that is stored in a high-temperature storage tank. During energy release, the heat stored in the high-temperature storage tank acts on the expander in the expansion section, driving it to output mechanical work and release energy.

[0004] The aforementioned compressed air energy storage systems typically require a certain temperature for the compressor's inlet air to operate. However, because compressed air energy storage systems are open systems, with the compressor's inlet directly connected to the outside environment, existing systems and control methods often fail to accurately and stably maintain the compressor's inlet air at an appropriate temperature, impacting the system's safe and stable operation.

[0005] To address the above issues, no effective solutions have been proposed so far. Summary of the Invention

[0006] The present application provides an air temperature control method and device for a compressed air energy storage system, which can fully utilize the waste heat of the compressor outlet air in the compression section of the compressed air energy storage system, accurately adjust the temperature of the compressor inlet air, so that the temperature of the air entering the compressor meets the preset operating requirements, and effectively improve the energy utilization rate of the entire machine while ensuring the safe and stable operation of the compressed air energy storage system.

[0007] The present application provides an air temperature control method for a compressed air energy storage system, which is applied to a compressed air energy storage system, wherein the compressed air energy storage system comprises at least a compression section and an expansion section;

[0008] The compression section at least includes: a first pipeline and a second pipeline; along the first pipeline, there are sequentially connected a rotary preheater, a first-stage compressor, a first cross-flow heat exchanger, a first cross-flow cooler, a first gas-liquid separator, a second-stage compressor, a second cross-flow heat exchanger, a second cross-flow cooler, a second gas-liquid separator, a third-stage compressor, a hairpin heat exchanger, a first U-shaped tube cooler, a third gas-liquid separator, a fourth-stage compressor, a second U-shaped tube cooler, a fourth gas-liquid separator, and a gas storage reservoir; along the second pipeline, there are sequentially connected a heat transfer medium output end of the rotary preheater, a buffer tank, a booster pump, a second U-shaped tube cooler, and a heat transfer medium input end of the rotary preheater;

[0009] The first cross-flow cooler, the second cross-flow cooler, and the first U-tube cooler are connected to the second pipeline through a first branch, a second branch, and a third branch, respectively; and the first branch, the second branch, and the third branch are respectively provided with a corresponding first flow regulating valve, a second flow regulating valve, and a third flow regulating valve; the first cross-flow heat exchanger, the second cross-flow heat exchanger, and the hairpin heat exchanger are respectively associated with an expansion section; the method includes:

[0010] obtaining a current temperature of the inlet air of the first-stage compressor as a current first temperature;

[0011] Using the preset first indicator temperature, detecting whether the current first temperature meets the preset operating requirements;

[0012] When it is determined that the current first temperature does not meet the preset operating requirements, determining a matching target control scheme based on the current first temperature;

[0013] According to the target control plan, the rotary preheater, the booster pump, the first flow regulating valve, the second flow regulating valve and the third flow regulating valve are adjusted accordingly.

[0014] In one embodiment, when the current first temperature is lower than a preset first index temperature, and the difference between the preset first index temperature and the current first temperature is greater than or equal to a first difference value, the rotary preheater, the booster pump, the first flow control valve, the second flow control valve, and the third flow control valve are adjusted accordingly according to the target control scheme, including:

[0015] According to the target control scheme, the power of the booster pump is adjusted; and the first updated first temperature is obtained;

[0016] detecting whether a difference between a preset first indicator temperature and a first updated first temperature is less than a first difference value;

[0017] When it is determined that the difference between the preset first index temperature and the first updated first temperature is less than the first difference value, adjusting the angle of the heat exchange surface of the rotary preheater; and obtaining the second updated first temperature;

[0018] detecting whether a difference between a preset first indicator temperature and a second updated first temperature is less than a second difference value;

[0019] When it is determined that the difference between the preset first index temperature and the second updated first temperature is less than the second difference value, the third flow control valve, the second flow control valve and / or the first flow control valve are adjusted in sequence so that the difference between the preset first index temperature and the third updated first temperature is less than the preset tolerance threshold.

[0020] In one embodiment, when the current first temperature is lower than the preset first index temperature, and the difference between the preset first index temperature and the current first temperature is lower than a first difference value and greater than or equal to a second difference value, the rotary preheater, the booster pump, the first flow control valve, the second flow control valve, and the third flow control valve are adjusted accordingly according to the target control scheme, including:

[0021] adjusting the angle of the heat exchange surface of the rotary preheater according to the target control scheme; and obtaining the second updated first temperature;

[0022] detecting whether a difference between a preset first indicator temperature and a second updated first temperature is less than a second difference value;

[0023] When it is determined that the difference between the preset first index temperature and the second updated first temperature is less than the second difference value, the third flow control valve, the second flow control valve and / or the first flow control valve are adjusted in sequence so that the difference between the preset first index temperature and the third updated first temperature is less than or equal to the preset tolerance threshold.

[0024] In one embodiment, when the current first temperature is lower than the preset first index temperature, and the difference between the preset first index temperature and the current first temperature is lower than the second difference value and greater than or equal to the preset tolerance threshold, the rotary preheater, the booster pump, the first flow control valve, the second flow control valve, and the third flow control valve are adjusted accordingly according to the target control scheme, including:

[0025] According to the target control scheme, the third flow regulating valve, the second flow regulating valve and / or the first flow regulating valve are adjusted in sequence so that the difference between the preset first indicator temperature and the third updated first temperature is less than or equal to the preset tolerance threshold.

[0026] In one embodiment, the method further comprises:

[0027] obtaining a current temperature of the inlet air of the second-stage compressor as a current second temperature;

[0028] Using a preset second temperature indicator, detecting whether the current second temperature meets the preset operating requirements;

[0029] When it is determined that the current second temperature does not meet the preset operating requirement, the first flow regulating valve is adjusted according to the current second temperature and the preset second temperature index.

[0030] In one embodiment, when it is determined that the current first temperature does not meet the preset operating requirements, the method further includes:

[0031] Obtaining the current temperature of the inlet air of the second-stage compressor as the current second temperature, the current temperature of the inlet air of the third-stage compressor as the current third temperature, and the current temperature of the inlet air of the fourth-stage compressor as the current fourth temperature;

[0032] jointly using a preset first temperature indicator, a preset second temperature indicator, a preset third temperature indicator, and a preset fourth temperature indicator to establish a system constraint condition;

[0033] Determine a matching target control scheme according to system constraints, the current first temperature, the current second temperature, the current third temperature, and the current fourth temperature;

[0034] According to the target control plan, the rotary preheater, the booster pump, the first flow regulating valve, the second flow regulating valve and the third flow regulating valve are adjusted accordingly.

[0035] In one embodiment, determining a matching target control scheme based on system constraints, the current first temperature, the current second temperature, the current third temperature, and the current fourth temperature includes:

[0036] Combining the system constraint condition, the current first temperature, the current second temperature, the current third temperature, and the current fourth temperature to obtain a corresponding target data group;

[0037] Processing the target data set using a preset control scheme decision model to obtain a corresponding target decision result; wherein the preset control scheme decision model is a neural network model pre-trained through deep reinforcement learning;

[0038] According to the target decision results, a matching target control plan is determined.

[0039] The present application also provides a compressed air energy storage system comprising at least a compression section and an expansion section;

[0040] The compression section at least includes: a first pipeline and a second pipeline; along the first pipeline, there are sequentially connected a rotary preheater, a first-stage compressor, a first cross-flow heat exchanger, a first cross-flow cooler, a first gas-liquid separator, a second-stage compressor, a second cross-flow heat exchanger, a second cross-flow cooler, a second gas-liquid separator, a third-stage compressor, a hairpin heat exchanger, a first U-shaped tube cooler, a third gas-liquid separator, a fourth-stage compressor, a second U-shaped tube cooler, a fourth gas-liquid separator, and a gas storage reservoir; along the second pipeline, there are sequentially connected a heat transfer medium output end of the rotary preheater, a buffer tank, a booster pump, a second U-shaped tube cooler, and a heat transfer medium input end of the rotary preheater;

[0041] The first cross-flow cooler, the second cross-flow cooler, and the first U-tube cooler are connected to the second pipeline through the first branch, the second branch, and the third branch, respectively; and the first branch, the second branch, and the third branch are respectively provided with corresponding first flow regulating valves, second flow regulating valves, and third flow regulating valves; the first cross-flow heat exchanger, the second cross-flow heat exchanger, and the hairpin heat exchanger are respectively associated with the expansion section.

[0042] The present application also provides an air temperature control device for a compressed air energy storage system, which is applied to a compressed air energy storage system, wherein the compressed air energy storage system comprises at least a compression section and an expansion section;

[0043] The compression section at least includes: a first pipeline and a second pipeline; along the first pipeline, a rotary preheater, a first-stage compressor, a first cross-flow heat exchanger, a first cross-flow cooler, a first gas-liquid separator, a second-stage compressor, a second cross-flow heat exchanger, a second cross-flow cooler, a second gas-liquid separator, a third-stage compressor, a hairpin heat exchanger, a first U-shaped tube cooler, a third gas-liquid separator, a fourth-stage compressor, a second U-shaped tube cooler, and a fourth gas-liquid separator are sequentially connected; along the second pipeline, a heat transfer medium output end of the rotary preheater, a buffer tank, a booster pump, a second U-shaped tube cooler, and a heat transfer medium input end of the rotary preheater are sequentially connected;

[0044] The first cross-flow cooler, the second cross-flow cooler, and the first U-tube cooler are connected to the second pipeline through the first branch, the second branch, and the third branch, respectively; and the first branch, the second branch, and the third branch are respectively provided with a corresponding first flow regulating valve, a second flow regulating valve, and a third flow regulating valve; the first cross-flow heat exchanger, the second cross-flow heat exchanger, and the hairpin heat exchanger are respectively associated with the expansion section; the device includes:

[0045] an acquisition module, configured to acquire a current temperature of the inlet air of the first-stage compressor as a current first temperature;

[0046] A detection module, configured to detect whether the current first temperature meets the preset operating requirements using the preset first indicator temperature;

[0047] a determination module, configured to determine a matching target control scheme based on the current first temperature when it is determined that the current first temperature does not meet the preset operating requirements;

[0048] The adjustment module is used to adjust the rotary preheater, the booster pump, the first flow regulating valve, the second flow regulating valve, and the third flow regulating valve according to the target control scheme.

[0049] The present application also provides a computer-readable storage medium having computer instructions stored thereon, which, when executed by a processor, implement the relevant steps of the air temperature control method of the compressed air energy storage system.

[0050] Based on the air temperature control method and device of the compressed air energy storage system provided by the present application, before specific implementation, the structure of the compression section in the compressed air energy storage system can be modified accordingly: use the first pipeline to sequentially connect the rotary preheater, the first compressor, the first cross-flow heat exchanger, the first cross-flow cooler, the first gas-liquid separator, the second compressor, the second cross-flow heat exchanger, the second cross-flow cooler, the second gas-liquid separator, the third compressor, the hairpin heat exchanger, the first U-shaped tube cooler, the third gas-liquid separator, the fourth compressor, the second U-shaped tube cooler, the cooler, a fourth gas-liquid separator, and a gas storage reservoir; at the same time, the second pipeline is used to sequentially connect the heat transfer medium output end of the rotary preheater, the buffer tank, the booster pump, the second U-tube cooler, and the heat transfer medium input end of the rotary preheater; and the first branch provided with a first flow regulating valve, the second branch provided with a second flow regulating valve, and the third branch provided with a third flow regulating valve are respectively used to connect the first cross-flow cooler, the second cross-flow cooler, and the first U-tube cooler to the second pipeline, so that the compression section can be adapted to the subsequent air temperature control.

[0051] In specific implementation, the compressed air energy storage system based on the above structure can first obtain the current temperature of the inlet air of the first-stage compressor as the current first temperature; then use the preset first indicator temperature to detect whether the current first temperature meets the preset operating requirements; if it is determined that the current first temperature does not meet the preset operating requirements, a matching target control scheme is determined based on the current first temperature; and according to the target control scheme, the rotary preheater, the booster pump, the first flow control valve, the second flow control valve, and the third flow control valve are adjusted accordingly.

[0052] This makes it possible to fully utilize the waste heat (or residual heat energy) of the compressor outlet air in the compression section of the compressed air energy storage system, accurately adjust the temperature of the compressor inlet air, so that the temperature of the air entering the compressor meets the preset operating requirements, and effectively improve the energy utilization rate of the entire machine while ensuring the safe and stable operation of the compressed air energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the embodiments of this specification, the following is a brief introduction to the drawings required for use in the embodiments. The drawings described below are only some of the embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0054] Figure 1 This is a schematic diagram of the structure of a compressed air energy storage system provided by an embodiment of this specification;

[0055] Figure 2 This is a flow chart of an air temperature control method for a compressed air energy storage system provided by one embodiment of this specification;

[0056] Figure 3 This is a schematic diagram of an embodiment of an air temperature control method for a compressed air energy storage system provided by an embodiment of this specification, in a scenario example;

[0057] Figure 4 This is a schematic diagram of an embodiment of an air temperature control method for a compressed air energy storage system provided by an embodiment of this specification, in a scenario example;

[0058] Figure 5 This is a schematic diagram of an embodiment of an air temperature control method for a compressed air energy storage system provided by an embodiment of this specification, in a scenario example;

[0059] Figure 6 This is a schematic diagram of the structure of a computer device provided by one embodiment of this specification;

[0060] Figure 7 This is a schematic diagram of the structural composition of an air temperature control device for a compressed air energy storage system provided in one embodiment of this specification. DETAILED DESCRIPTION

[0061] To help those skilled in the art better understand the technical solutions in this specification, the following will provide a clear and complete description of the technical solutions in the embodiments of this specification, in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of this specification, not all of them. All other embodiments derived by those skilled in the art based on the embodiments in this specification without creative effort shall fall within the scope of protection of this specification.

[0062] It should be noted that in the embodiments of this specification, certain software, components, models and other existing solutions in the industry may be mentioned. They should be regarded as exemplary and their purpose is only to illustrate the feasibility of implementing the technical solution of this application, but it does not mean that the applicant has or will necessarily use the solution.

[0063] Considering the existing compressed air energy storage system, when storing energy, the air will be compressed by multiple compressors after entering the compression section; it will be cooled by the heat exchanger connected to each compressor, and the corresponding heat energy will be collected; the collected heat energy will then be stored in a high-temperature storage tank connected to the expansion section, so that it can be used for subsequent energy release in the expansion section.

[0064] Some existing compressed air energy storage systems and related control methods can simply preheat the compressor's inlet air, but they can't accurately and stably maintain the inlet air's temperature at a matching value, which can still affect the operation of the compressed air energy storage system. This problem is particularly pronounced when the ambient temperature differs significantly from the matching value.

[0065] Furthermore, existing compressed air energy storage systems and related control methods can effectively utilize the heat energy collected by the heat exchanger in the expansion stage. However, the compressor outlet air still contains a small amount of heat energy after the heat energy is collected by the heat exchanger, which cannot be effectively recovered and utilized, resulting in a certain amount of energy waste during the operation of the compressed air energy storage system.

[0066] In response to the above issues, and considering their root causes, we first consider the thermal energy (referred to as low-quality thermal energy) present in the compressor outlet air after it has been collected by the heat exchanger. While this energy is relatively low and insufficient to support the subsequent energy release in the expansion stage, it still contains considerable energy. See Table 1 for details.

[0067] Table 1

[0068]

[0069]

[0070] Secondly, based on the long-term use experience of compressed air energy storage systems, it has also been found that the temperature of the compressor inlet air required to maintain normal operation of the compressed air energy storage system is often relatively limited relative to the external environment. In this case, recycling the residual heat energy of the compressor outlet air after it has been collected by the heat exchanger can basically achieve effective preheating of the compressor inlet air and can stably maintain the inlet air temperature at a matching value.

[0071] Furthermore, it is also considered that with the changes in environmental factors such as seasons and time, the temperature of the external environment will change accordingly, which will cause the temperature value of the inlet air of the compressor to change dynamically.

[0072] Furthermore, considering that the compression stage often includes multiple compressors, the outlet air temperatures of different compressor stages can vary. For details, see Table 1. The outlet air of the fourth compressor stage has the highest residual heat energy, followed by the third, and finally the first and second stages. Therefore, using the residual heat energy of the outlet air from different compressor stages to preheat the compressor's inlet air produces different results.

[0073] Furthermore, it is also considered that factors such as the structure of the heat exchanger and the flow rate of the heat-conducting medium (eg, water) in the pipeline will also affect the heating effect of the compressor inlet air.

[0074] Based on the above situation, the present application considers that the structure of the compression section in the compressed air energy storage system can be modified accordingly to make the compression section compatible with the subsequent air temperature control.

[0075] Specifically, first, a pipeline can be used to sequentially connect the output end of the heat exchanger located on the inlet side of the first-stage compressor, the buffer tank, the booster pump, the cooler located on the outlet side of the fourth-stage compressor, and the input end of the heat exchanger located on the inlet side of the first-stage compressor to form a main loop (i.e., the second pipeline) for preheating the inlet air of the first-stage compressor. Furthermore, based on the temperature variation, the booster pump can be used to adjust the flow rate of the heat transfer medium in the main loop to control the amount of residual heat energy carried by the outlet air output by the fourth-stage compressor and actually fed into the heat exchanger on the inlet side of the first-stage compressor, thereby significantly adjusting the inlet air temperature. This allows the inlet air temperature of the first-stage compressor to be efficiently adjusted to a temperature value within a range that matches the preset operating requirements.

[0076] Secondly, the first branch, the second branch, and the third branch can be used to form an auxiliary loop for preheating the inlet air of the first-stage compressor by combining the cooler provided at the outlet of the first-stage compressor, the cooler provided at the outlet of the second-stage compressor, and the cooler provided at the outlet of the third-stage compressor. Furthermore, after the booster pump is used to adjust the inlet air temperature of the first-stage compressor to a temperature within a range of a matching temperature value that meets preset operating requirements, the flow rate of the heat transfer medium in each branch can be adjusted by using flow control valves provided on the aforementioned multiple branches. This controls the amount of residual heat energy carried by the outlet air output by the first-stage compressor, the second-stage compressor, and the third-stage compressor that is actually fed into the heat exchanger on the inlet side of the first-stage compressor, thereby achieving real-time, small-scale, and refined adjustment of the inlet air temperature of the first-stage compressor to accurately and stably maintain the inlet air temperature at the matching temperature value.

[0077] In addition, a rotary heat exchanger was introduced and used as the heat exchanger at the inlet level of the first-stage compressor. This leveraged the structural characteristics of the rotary heat exchanger and, by adjusting the angle of its heat transfer surface, altered its effective area, aligning with the booster pump's adjustments to assist in adjusting the inlet air temperature of the first-stage compressor.

[0078] After completing the above-mentioned transformation, based on the above-mentioned compression section, the current temperature of the inlet air of the first-stage compressor can be obtained and distinguished according to different scenario conditions (for example, low temperature scenario, normal temperature scenario, etc.); then, a matching target control scheme can be determined according to different scenario conditions; and then, according to the target control scheme, the rotary preheater, booster pump, first flow regulating valve, second flow regulating valve, and third flow regulating valve in the above-mentioned first compression section are adjusted in a targeted manner, so as to fully utilize the waste heat of the compressor outlet air in the compression section of the compressed air energy storage system, accurately adjust the temperature of the compressor inlet air, so that the temperature of the air entering the compressor meets the preset operating requirements, while ensuring the safe and stable operation of the compressed air energy storage system, effectively improving the energy utilization rate of the entire machine.

[0079] See Figure 1 As shown, the embodiments of this specification provide a compressed air energy storage system, wherein the system includes at least a compression section and an expansion section; the compression section can specifically be a modified compression section.

[0080] Specifically, the compression section may include at least: a first pipeline and a second pipeline; a rotary preheater, a first-stage compressor, a first cross-flow heat exchanger, a first cross-flow cooler, a first gas-liquid separator, a second-stage compressor, a second cross-flow heat exchanger, a second cross-flow cooler, a second gas-liquid separator, a third-stage compressor, a hairpin heat exchanger, a first U-shaped tube cooler, a third gas-liquid separator, a fourth-stage compressor, a second U-shaped tube cooler, a fourth gas-liquid separator, and a gas storage reservoir are sequentially connected along the first pipeline; a heat transfer medium output end of the rotary preheater, a buffer tank, a booster pump, a second U-shaped tube cooler, and a heat transfer medium input end of the rotary preheater are sequentially connected along the second pipeline;

[0081] The first cross-flow cooler, the second cross-flow cooler, and the first U-tube cooler are connected to the second pipeline through the first branch, the second branch, and the third branch, respectively; and the first branch, the second branch, and the third branch are respectively provided with corresponding first flow regulating valves, second flow regulating valves, and third flow regulating valves; the first cross-flow heat exchanger, the second cross-flow heat exchanger, and the hairpin heat exchanger are respectively associated with the expansion section.

[0082] The aforementioned rotary heat exchanger can be specifically understood as a high-efficiency heat exchanger. Specifically, in this heat exchanger, heat pipes are arranged in a ring on a circular tube sheet. The tube sheet is connected to a drive shaft and can rotate at any angle. Accordingly, by adjusting the rotation angle of the tube sheet, the effective heat exchange surface area acting on the inlet air can be adjusted, achieving varying degrees of heating of the inlet air.

[0083] Accordingly, by setting up and using a rotary heat exchanger on the inlet side of the first-stage compressor instead of a conventional heat exchanger, on the one hand, the inlet air can be heated more effectively; on the other hand, the structural characteristics of the rotary heat exchanger can be utilized to flexibly adjust the thermal energy actually applied to the inlet air by the heat exchanger.

[0084] The above-mentioned cross-flow heat exchanger can be specifically understood as a relatively conventional heat exchanger.

[0085] The hairpin heat exchanger is another type of high-efficiency heat exchanger, which has the characteristics of occupying a relatively smaller space and having a relatively higher heat transfer efficiency.

[0086] Accordingly, by setting and using a hairpin heat exchanger on the outlet side of the third-stage compressor instead of a conventional heat exchanger, on the one hand, relatively more heat energy can be collected and subsequently used in the expansion stage; on the other hand, it also helps to reduce the overall size of the compression stage, making the compression stage structure relatively more compact.

[0087] Specifically, the rotary heat exchanger is used to heat the inlet air of the first-stage compressor.

[0088] The input and output ends of the first, second, and hairpin heat exchangers are connected to corresponding low-temperature and high-temperature storage tanks, respectively. These first, second, and hairpin heat exchangers are used to recover and store a portion of the heat energy from the outlet air compressed by the first, second, and third compressors, respectively, and store it in the high-temperature storage tank for subsequent energy release in the expansion stage.

[0089] The cross-flow cooler can be specifically understood as a relatively conventional cooler that can reduce the air temperature and recover part of the heat energy in the air.

[0090] The above-mentioned U-tube cooler can be specifically understood as a cooler that can more effectively reduce the air temperature and recover part of the heat energy in the air compared to a conventional cooler.

[0091] Accordingly, considering that the outlet air output by the third-stage compressor and the fourth-stage compressor carries relatively higher residual heat energy, a first U-tube cooler and a second U-tube cooler are connected behind the third-stage compressor and the fourth-stage compressor respectively instead of conventional coolers. On the one hand, the outlet air temperature of the third-stage compressor and the outlet temperature of the fourth-stage compressor can be more effectively reduced to meet the operating requirements of subsequent equipment; on the other hand, relatively more residual heat energy can be recovered for use in heating the inlet air of the first-stage compressor; on the other hand, the overall cost of the system can be effectively reduced.

[0092] Specifically, the above-mentioned first cross-flow cooler, second cross-flow heat exchanger, and first U-tube cooler are used to further cool the outlet air after being processed by the corresponding heat exchanger so that the air temperature meets the operating requirements of the subsequent compressor; at the same time, while cooling the air, a small amount of residual heat energy carried by the outlet air can be recovered.

[0093] The above-mentioned second U-tube cooler is used to directly cool the outlet air compressed by the fourth-stage compressor so that the air temperature meets the storage requirements of the subsequent gas storage reservoir; at the same time, it can recover a large amount of residual heat energy carried by the outlet air while cooling the air.

[0094] The above-mentioned first gas-liquid separator, second gas-liquid separator, third gas-liquid separator and fourth gas-liquid separator are respectively used to perform gas-liquid separator on the air input into the second-stage compressor, the third-stage compressor, the fourth-stage compressor and the gas storage reservoir to ensure that the input air is dry and will not affect the operation and use of related equipment.

[0095] The buffer tank stores a heat transfer medium. Specifically, the heat transfer medium may be water. Other types of liquids may also be used as the heat transfer medium, depending on the specific circumstances and processing requirements. This specification does not limit this.

[0096] The first flow regulating valve, the second flow regulating valve and the third flow regulating valve may be specifically an electromagnetic control valve, which may be used to control the conduction and closing of the branch, as well as the specific flow of the branch.

[0097] In specific implementation, based on the first pipeline of the compression section in the compressed air energy storage system with the above structure, when compression is performed, the air outside the system can be first preheated by rotation and then transported to the first compressor for the first compression; the compressed outlet air can first pass through the first cross-flow heat exchanger for the first cooling, thereby losing some heat energy; and then pass through the first cooler for the second cooling, thereby losing some heat energy, so that the air temperature meets the operating requirements of the second compressor.

[0098] At this time, after being processed by the first gas-liquid separator, the air can be transported to the second compressor for a second compression; the compressed outlet air can first pass through the second cross-flow heat exchanger for a first cooling, losing some heat energy; and then pass through the second cooler for a second cooling, losing some heat energy.

[0099] At this time, the air temperature meets the operating requirements of the third-stage compressor. After being processed by the second gas-liquid separator, the air can be transported to the third-stage compressor for a third compression. The compressed outlet air can first pass through the hairpin heat exchanger for the first cooling, losing some heat energy; then pass through the first U-tube cooler for the second cooling, losing some heat energy, so that the air temperature meets the operating requirements of the fourth-stage compressor.

[0100] At this time, after being processed by the third gas-liquid separator, the air can be transported to the fourth compressor for the fourth compression; the compressed outlet air can be cooled once through the second U-tube cooler, losing some heat energy so that the air temperature meets the storage requirements of the gas storage; after being processed by the fourth gas-liquid separator, it is transported to the gas storage for storage.

[0101] While compression is being performed as described above, the second pipeline of the compression section in the compressed air energy storage system based on the above structure can control the corresponding amount of heat-conducting medium in the buffer tank to flow into the second U-tube cooler by adjusting the booster pump, and heat the heat-conducting medium by the residual heat energy of the outlet air of the fourth compressor recovered by the second U-tube cooler; the heated heat-conducting medium is then transported to the rotary heat exchanger; the effective area of ​​the heat-conducting surface is changed by adjusting the angle of the heat-conducting surface of the rotary heat exchanger to effectively utilize part or all of the heated heat-conducting medium, and the inlet air of the first-section compressor is heated by heat release; and the heat-conducting medium after heat release is then transported back to the buffer tank.

[0102] In addition, based on the above-mentioned second pipeline, the conduction, closure, and specific flow of the relevant branches can be controlled by controlling the states of the first flow regulating valve, the second flow regulating valve, and the third flow regulating valve, so that on the basis of preheating the inlet of the first compressor by utilizing the residual heat energy of the outlet air of the fourth compressor, the residual heat energy of the outlet air of the first compressor, the residual heat energy of the outlet air of the second compressor, and the residual heat energy of the outlet air of the third compressor can be flexibly controlled to auxiliary heat the inlet air of the first compressor, so that the temperature of the inlet air can be accurately and stably maintained at a matching temperature value that meets the preset operating requirements.

[0103] In some embodiments, a first temperature sensor may be provided at the air input end of the rotary heat exchanger for monitoring and collecting the actual temperature of the inlet air of the first stage compressor before preheating (which may be recorded as the temperature before preheating).

[0104] The compressed air energy storage system may further include a processor, wherein the processor is connected to at least the first temperature sensor, the rotary preheater, the booster pump, the first flow regulating valve, the second flow regulating valve, and the third flow regulating valve.

[0105] Accordingly, during specific implementation, the processor can collect the temperature before preheating through the first temperature sensor, and distinguish different scenario conditions based on the temperature before preheating; then determine a matching target control scheme, and adjust and control one or more of the rotary preheater, the booster pump, the first flow regulating valve, the second flow regulating valve, and the third flow regulating valve according to the matching target control scheme, and perform matching preheating treatment on the inlet air of the first-stage compressor to accurately adjust the temperature of the compressor inlet air so that the temperature of the air entering the first-stage compressor after preheating meets the preset operating requirements.

[0106] In some embodiments, a second temperature sensor may be provided at the air output end of the rotary heat exchanger for monitoring and collecting the actual temperature of the inlet air of the first-stage compressor after preheating (which may be recorded as the preheated temperature).

[0107] Correspondingly, after the inlet air of the first-stage compressor is preheated in a matching manner based on the target control scheme in the above manner, the preheated temperature can be collected by the second temperature sensor; and the preset first indicator temperature can be used to detect whether the preheated temperature meets the preset operating requirements.

[0108] In specific implementation, the difference between the preset first indicator temperature and the temperature after preheating can be calculated; and it can be detected whether the difference is less than or equal to the preset tolerance threshold; if it is determined that the difference is less than or equal to the preset tolerance threshold, it is determined that the preset operating requirements are met.

[0109] On the contrary, when it is determined that the difference is greater than the preset tolerance threshold, it is determined that the preset operating requirements are not met; at this time, one or more of the first flow control valve, the second flow control valve, and the third flow control valve can be fine-tuned based on the above difference, so that the difference between the preheating temperature collected by the second temperature sensor and the first index temperature is less than or equal to the preset tolerance threshold.

[0110] The preset tolerance threshold may be a minimum value close to 0.

[0111] The above-mentioned preset first indicator temperature can specifically be a reference temperature obtained by pre-organizing and clustering historical operation records of a large number of compressed air energy storage systems, which can ensure that the compressed air energy storage system has a good performance state and operates safely and stably.

[0112] Specifically, the preset first indicator temperature may be 35°C.

[0113] During specific implementation, the environmental parameters of the compressed air energy storage system can be obtained; based on the environmental parameters, a reference temperature set is queried to determine a reference temperature that matches the environmental parameters as the preset first indicator temperature.

[0114] The environmental parameters may include at least one of the following: season, time, humidity, weather, location coordinates, etc. The reference temperature set may include multiple reference temperatures, each of which corresponds to at least one environmental parameter range.

[0115] In some embodiments, a filter may be connected in front of the air input end of the rotary heat exchanger to filter the air before it is input into the rotary heat exchanger to prevent dust and other impurities in the air from clogging the equipment in the compression section and affecting the operation of the entire machine.

[0116] In some embodiments, a muffler may be connected in front of the air input end of the rotary heat exchanger to eliminate the noise generated by the compressed air energy storage system during operation to a certain extent and reduce interference to nearby personnel.

[0117] In some embodiments, a third temperature sensor may be further provided on the first pipeline at a position adjacent to the rear of the second U-tube cooler.

[0118] Correspondingly, the temperature of the outlet air of the fourth stage compressor after cooling by the second U-tube cooler can be collected by the third temperature sensor; and it can be detected whether the temperature is less than or equal to the preset storage temperature; when it is determined that the temperature of the outlet air is less than or equal to the preset storage temperature, the outlet air can be stored normally in the gas storage reservoir.

[0119] On the contrary, when it is determined that the temperature of the outlet air is greater than the preset storage temperature, the second U-tube cooler may be adjusted so that the outlet air cooled by the second U-tube cooler is less than or equal to the preset storage temperature.

[0120] In some embodiments, corresponding temperature sensors may be further provided on the first pipeline adjacent to the rear of the first cross-flow cooler, the second cross-flow cooler, and the first U-tube cooler, respectively; the temperature of the outlet air is collected by the above-mentioned temperature sensors, and it is detected whether the temperature of the outlet air meets the operating requirements of the subsequently connected equipment.

[0121] In some embodiments, see also Figure 1 As shown, a fourth flow control valve is installed on the second pipeline near the heat transfer medium input end of the rotary heat exchanger. This allows the fourth flow control valve to adjust the actual heat energy fed into the rotary heat exchanger by the residual heat energy of the outlet air output by the fourth compressor stage and the residual heat energy of the outlet air output by the other compressor stages.

[0122] In some embodiments, see also Figure 1 As shown, a fifth flow control valve is installed in the second pipeline between the heat transfer medium output end of the second U-tube cooler and the branch connection point. This allows the fifth flow control valve to individually adjust the actual heat energy fed into the rotary heat exchanger from the residual heat energy of the outlet air output by the fourth-stage compressor.

[0123] In some embodiments, the expansion section can also be connected to the second pipeline via a corresponding branch. In this way, when the heat energy collected by the compression section is greater than or equal to a preset upper limit of heat energy and exceeds the energy tolerance of the compression section, the excess heat energy can be fed into the expansion section via this branch. The expansion section can be equipped with an energy storage unit for temporarily storing excess heat energy fed into the compression section via the corresponding branch. This allows for the effective use of excess heat energy for energy release in the expansion section while also ensuring the safe and stable operation of the compression section.

[0124] When the heat energy collected by the compression stage is greater than or equal to a preset lower limit and insufficient to preheat the inlet air of the first compressor stage, this branch circuit can be used to retrieve some or all of the stored energy from the energy storage unit in the expansion stage to assist in preheating the inlet air. This allows the compression stage to obtain sufficient energy to preheat the inlet air even in certain circumstances, and to maintain the inlet air temperature at a suitable value (e.g., a preset first target temperature).

[0125] Based on the above-mentioned compressed air energy storage system, by adjusting the rotary preheater, booster pump, first flow regulating valve, second flow regulating valve, and third flow regulating valve, it is possible to fully utilize the waste heat of the compressor outlet air in the compression section of the compressed air energy storage system, and accurately adjust the temperature of the compressor inlet air so that the temperature of the air entering the compressor meets the preset operating requirements. While ensuring the safe and stable operation of the compressed air energy storage system, it effectively improves the energy utilization rate of the entire machine.

[0126] The embodiments of this specification also provide an air temperature control method for a compressed air energy storage system, which is applied to a compressed air energy storage system, wherein the compressed air energy storage system includes at least a compression section and an expansion section;

[0127] The compression section at least includes: a first pipeline and a second pipeline; along the first pipeline, there are sequentially connected a rotary preheater, a first-stage compressor, a first cross-flow heat exchanger, a first cross-flow cooler, a first gas-liquid separator, a second-stage compressor, a second cross-flow heat exchanger, a second cross-flow cooler, a second gas-liquid separator, a third-stage compressor, a hairpin heat exchanger, a first U-shaped tube cooler, a third gas-liquid separator, a fourth-stage compressor, a second U-shaped tube cooler, a fourth gas-liquid separator, and a gas storage reservoir; along the second pipeline, there are sequentially connected a heat transfer medium output end of the rotary preheater, a buffer tank, a booster pump, a second U-shaped tube cooler, and a heat transfer medium input end of the rotary preheater;

[0128] The first cross-flow cooler, the second cross-flow cooler, and the first U-tube cooler are connected to the second pipeline through the first branch, the second branch, and the third branch respectively; and the first branch, the second branch, and the third branch are respectively provided with a corresponding first flow regulating valve, a second flow regulating valve, and a third flow regulating valve; the first cross-flow heat exchanger, the second cross-flow heat exchanger, and the hairpin heat exchanger are respectively associated with the expansion section; when the method is specifically implemented, refer to Figure 2 As shown, it can include the following:

[0129] S201: Acquire the current temperature of the inlet air of the first compressor as the current first temperature;

[0130] S202: Using a preset first indicator temperature, detecting whether the current first temperature meets a preset operating requirement;

[0131] S203: If it is determined that the current first temperature does not meet the preset operating requirements, determine a matching target control scheme based on the current first temperature;

[0132] S204: According to the target control scheme, the rotary preheater, the booster pump, the first flow regulating valve, the second flow regulating valve, and the third flow regulating valve are adjusted accordingly.

[0133] In a specific implementation, before the rotary heat exchanger is started, air temperature data is collected by the first temperature sensor or the second temperature sensor as the current first temperature.

[0134] During specific implementation, it may be detected whether the difference between the first indicator temperature and the current first temperature is less than or equal to a preset tolerance threshold, and whether the current first temperature meets the preset operating requirements.

[0135] If it is determined that the difference between the first indicator temperature and the current first temperature is less than or equal to the preset tolerance threshold, it is determined that the preset operating requirements are met. In this case, the rotary heat exchanger does not need to be started additionally.

[0136] Conversely, if the difference between the first indicator temperature and the current first temperature is greater than a preset tolerance threshold, it is determined that the preset operating requirements are not met. In this case, the rotary heat exchanger can be activated; and based on the current first temperature, different scenarios can be distinguished and a matching target control scheme can be determined. Based on this target control scheme, relevant structures in the compression stage, such as the rotary preheater, booster pump, first flow control valve, second flow control valve, and third flow control valve, are adjusted accordingly to ensure that the inlet temperature of the first stage compressor meets the preset operating requirements.

[0137] During specific implementation, the current environmental parameters of the compressed air energy storage system may be obtained; the current environmental parameters and the current first temperature may be combined to query a preset control scheme database and determine a matching target control scheme.

[0138] The preset control scheme database stores a plurality of preset control schemes, each of which corresponds to at least one combination of an environmental parameter range and a temperature range.

[0139] Before specific implementation, a preset control scheme database can be constructed in the following manner: collect a large number of historical control records based on close or similar compressed air energy storage systems; extract corresponding temperature parameters, environmental parameters, and specific adjustment control processes from the historical control records and combine them to obtain multiple sample control data; cluster the multiple sample control data to extract common control steps corresponding to the same or similar combinations of temperature parameters and environmental parameters and combine them to obtain multiple corresponding preset control schemes; combine multiple preset control schemes to establish a preset control scheme database.

[0140] In some embodiments, see Figure 3 As shown, when the current first temperature is lower than the preset first index temperature, and the difference between the preset first index temperature and the current first temperature is greater than or equal to the first difference value, the rotary preheater, the booster pump, the first flow control valve, the second flow control valve, and the third flow control valve are adjusted accordingly according to the target control scheme. The specific implementation may include the following:

[0141] S1: adjusting the power of the booster pump according to the target control scheme; and obtaining a first updated first temperature;

[0142] S2: Detect whether the difference between the preset first indicator temperature and the first updated first temperature is less than a first difference value;

[0143] S3: if it is determined that the difference between the preset first index temperature and the first updated first temperature is less than the first difference value, adjusting the angle of the heat exchange surface of the rotary preheater; and obtaining the second updated first temperature;

[0144] S4: Detecting whether the difference between the preset first indicator temperature and the second updated first temperature is less than a second difference value;

[0145] S5: When it is determined that the difference between the preset first index temperature and the second updated first temperature is less than the second difference value, adjust the third flow control valve, the second flow control valve and / or the first flow control valve in sequence so that the difference between the preset first index temperature and the third updated first temperature is less than the preset tolerance threshold.

[0146] During specific implementation, the temperature of the inlet air of the first-stage compressor can be adjusted multiple times according to the target control scheme to reach a preset first index temperature to meet the preset operating requirements.

[0147] During specific implementation, it is possible to first detect whether the difference between the preset first index temperature and the first temperature after the first update is less than the first difference value; when it is determined that the difference between the preset first index temperature and the first temperature after the first update is greater than or equal to the first difference value, determine the corresponding power parameter based on the difference; based on the power parameter, by adjusting the power of the booster pump, adjust the flow rate of the heat transfer medium in the main pipeline in the second pipeline, and adjust the temperature of the inlet air of the first-stage compressor with a relatively large adjustment range, thereby achieving the first adjustment and obtaining the corresponding updated first temperature.

[0148] The updated first temperature may be specifically understood as the temperature of the inlet air input to the first-stage compressor after the first adjustment and the preheating treatment using the rotary preheating method.

[0149] The first difference value may specifically be a relatively large temperature value, for example, 5 degrees Celsius. Of course, during implementation, other appropriate temperature values ​​may be set as the first difference value according to specific circumstances and application scenarios.

[0150] In specific implementation, when it is determined that the difference between the preset first index temperature and the first updated first temperature is less than the first difference value, the difference between the preset first index temperature and the first updated first temperature can also be calculated and based on the difference between the preset first index temperature and the first updated first temperature, the angle of the heat exchange surface of the rotary heat exchanger is adjusted to change the area of ​​the effective heat exchange surface acting on the inlet air, and the temperature of the inlet air of the first-stage compressor is continued to be adjusted with a relatively large adjustment range to achieve a second adjustment and obtain the corresponding updated second temperature.

[0151] During the second adjustment process, the updated second temperature can also be monitored in real time; and based on the updated second temperature, the angle of the heat exchange surface of the rotary heat exchanger is fine-tuned multiple times until the difference between the monitored updated second temperature and the preset first index temperature is less than the second difference value.

[0152] The updated second temperature may be specifically understood as the temperature of the inlet air input to the first-stage compressor during the preheating process using rotary preheating during the second adjustment process.

[0153] The second difference value may be a relatively small temperature value, for example, 2 degrees Celsius. Of course, in specific implementation, other appropriate temperature values ​​may be set as the second difference value according to specific circumstances and application scenarios.

[0154] In specific implementation, when it is determined that the difference between the preset first index temperature and the second updated first temperature is less than the second difference value, the third flow control valve, the second flow control valve and / or the first flow control valve can be adjusted in sequence according to the target control scheme to adjust the conduction and closed state of the third branch, the second branch and the first branch, as well as the specific flow rate in the conduction state, so as to flexibly introduce and combine the residual heat energy of the outlet air output by the third-stage compressor, the residual heat energy of the outlet air output by the second-stage compressor, and the residual heat energy of the outlet air output by the first-stage compressor, and adjust the temperature of the inlet air of the first-stage compressor with a relatively small adjustment range, perform auxiliary heating treatment, realize the third adjustment, and obtain the corresponding updated third temperature.

[0155] During the third adjustment process, the updated third temperature can also be monitored in real time; and based on the updated third temperature, the third flow control valve, the second flow control valve, and the first flow control valve are fine-tuned multiple times until the difference between the monitored updated third temperature and the preset first indicator temperature is less than the preset tolerance threshold.

[0156] The updated third temperature may be specifically understood as the temperature of the inlet air input to the first-stage compressor during the preheating process using rotary preheating during the third adjustment process.

[0157] In specific implementation, when it is monitored that the difference between the temperature of the inlet air of the first-stage compressor and the preset first index temperature is less than the preset tolerance threshold, the relevant parameters of the booster pump and the rotary heat exchanger can be kept unchanged; and the temperature of the inlet air of the first-stage compressor can continue to be monitored; when it is monitored that the difference between the temperature of the inlet air of the first-stage compressor and the preset first index temperature is greater than or equal to the preset tolerance threshold, the third flow control valve, the second flow control valve, and the first flow control valve can be fine-tuned accordingly according to the target control scheme until the difference between the monitored temperature of the inlet air of the first-stage compressor and the preset first index temperature is less than the preset tolerance threshold.

[0158] Based on the above embodiment, when the current first temperature is lower than the preset first index temperature, and the difference between the preset first index temperature and the current first temperature is greater than or equal to the first difference value, the target control scheme can intelligently and accurately adjust the temperature of the inlet air of the first-stage compressor to a matching temperature value to meet the preset operating requirements; at the same time, the temperature of the inlet air of the first-stage compressor can be well maintained within a temperature range adjacent to the preset first index temperature, thereby ensuring that the compressed air energy storage system can operate stably and safely.

[0159] In some embodiments, when the current first temperature is lower than the preset first index temperature, and the difference between the preset first index temperature and the current first temperature is lower than a first difference value and greater than or equal to a second difference value, the rotary preheater, the booster pump, the first flow control valve, the second flow control valve, and the third flow control valve are adjusted accordingly according to the target control scheme. Specific implementation may include the following:

[0160] S1: adjusting the angle of the heat exchange surface of the rotary preheater according to the target control scheme; and obtaining the second updated first temperature;

[0161] S2: Detect whether the difference between the preset first indicator temperature and the second updated first temperature is less than a second difference value;

[0162] S3: When it is determined that the difference between the preset first index temperature and the second updated first temperature is less than the second difference value, adjust the third flow control valve, the second flow control valve and / or the first flow control valve in sequence so that the difference between the preset first index temperature and the third updated first temperature is less than or equal to the preset tolerance threshold.

[0163] Based on the above embodiment, when the current first temperature is lower than the preset first index temperature, and the difference between the preset first index temperature and the current first temperature is lower than the first difference value and greater than or equal to the second difference value, the target control scheme can intelligently and accurately adjust the temperature of the inlet air of the first-stage compressor to a matching temperature value to meet the preset operating requirements; at the same time, the temperature of the inlet air of the first-stage compressor can be well maintained within a temperature range adjacent to the preset first index temperature, thereby ensuring that the compressed air energy storage system can operate stably and safely.

[0164] In some embodiments, when the current first temperature is lower than a preset first index temperature, and the difference between the preset first index temperature and the current first temperature is lower than a second difference value and greater than or equal to a preset tolerance threshold, the rotary preheater, the booster pump, the first flow control valve, the second flow control valve, and the third flow control valve are adjusted accordingly according to the target control scheme. Specific implementation may include:

[0165] According to the target control scheme, the third flow regulating valve, the second flow regulating valve and / or the first flow regulating valve are adjusted in sequence so that the difference between the preset first indicator temperature and the third updated first temperature is less than or equal to the preset tolerance threshold.

[0166] Based on the above embodiment, when the current first temperature is lower than the preset first index temperature, and the difference between the preset first index temperature and the current first temperature is lower than the second difference value and greater than or equal to the preset tolerance threshold, the target control scheme can intelligently and accurately adjust the temperature of the inlet air of the first-stage compressor to a matching temperature value to meet the preset operating requirements; at the same time, the temperature of the inlet air of the first-stage compressor can be well maintained within the adjacent temperature range of the preset first index temperature, so as to ensure that the compressed air energy storage system can operate stably and safely.

[0167] In some embodiments, the third flow regulating valve, the second flow regulating valve and / or the first flow regulating valve are adjusted in sequence so that the difference between the preset first index temperature and the third updated first temperature is less than or equal to the preset tolerance threshold. In specific implementation, the following contents may be included: first adjust the third flow regulating valve so that the third branch is in a conducting state; then adjust the flow of the third branch multiple times by adjusting the third flow regulating valve; and simultaneously monitor the inlet air temperature of the first compressor.

[0168] When it is determined through multiple adjustments that the difference between the monitored inlet air temperature of the first-stage compressor and the preset first index temperature is less than the third difference value, the adjustment of the third flow control valve is stopped; the second flow control valve and / or the first flow control valve are adjusted so that the second branch and / or the first branch are in a conducting state; and the second flow control valve and / or the first flow control valve are adjusted multiple times for fine-tuning until the difference between the monitored inlet air temperature of the first-stage compressor and the preset first index temperature is less than or equal to the preset tolerance threshold.

[0169] On the contrary, when the difference between the monitored inlet air temperature of the first-stage compressor and the preset first index temperature is always greater than or equal to the third difference value through multiple adjustments, the third flow control valve is adjusted so that the third branch is in a closed state; then the second flow control valve and / or the first flow control valve are adjusted so that the second branch and / or the first branch are in a conducting state; and then the second flow control valve and / or the first flow control valve are adjusted to perform multiple fine adjustments until the difference between the monitored inlet air temperature of the first-stage compressor and the preset first index temperature is less than or equal to the preset tolerance threshold.

[0170] Based on the above embodiment, the inlet air temperature of the first-stage compressor can be finely adjusted to a matching temperature value by adjusting the third flow regulating valve, the second flow regulating valve, and the first flow regulating valve to meet the preset operating requirements.

[0171] In some embodiments, the method may further include the following when implemented:

[0172] S1: obtaining the current temperature of the inlet air of the second-stage compressor as the current second temperature;

[0173] S2: Using a preset second temperature indicator, detecting whether the current second temperature meets the preset operating requirements;

[0174] S3: When it is determined that the current second temperature does not meet the preset operating requirement, the first flow regulating valve is adjusted according to the current second temperature and a preset second temperature index.

[0175] In specific implementation, the temperature of the air passing through the first cross-flow heat exchanger and entering the second-stage compressor can be further adjusted by adjusting the first flow regulating valve so that the air temperature reaches or approaches a preset second temperature index, meets the preset operating requirements, and ensures the stable and safe operation of the second-stage compressor.

[0176] Based on the above embodiment, the first flow regulating valve can be adjusted so that the inlet air input to the second-stage compressor meets the preset operating requirements.

[0177] In a similar manner, the second flow regulating valve and the third flow regulating valve may be adjusted to respectively make the inlet air input to the third stage compressor and the fourth stage compressor meet the preset operating requirements.

[0178] In some embodiments, when it is determined that the current first temperature does not meet the preset operating requirements, refer to Figure 4 As shown, the method may further include the following contents:

[0179] S1: acquiring the current temperature of the inlet air of the second-stage compressor as the current second temperature, the current temperature of the inlet air of the third-stage compressor as the current third temperature, and the current temperature of the inlet air of the fourth-stage compressor as the current fourth temperature;

[0180] S2: jointly using a preset first temperature indicator, a preset second temperature indicator, a preset third temperature indicator, and a preset fourth temperature indicator to establish a system constraint condition;

[0181] S3: Determine a matching target control scheme based on the system constraints, the current first temperature, the current second temperature, the current third temperature, and the current fourth temperature;

[0182] S4: According to the target control plan, the rotary preheater, the booster pump, the first flow regulating valve, the second flow regulating valve, and the third flow regulating valve are adjusted accordingly.

[0183] During specific implementation, the system constraints, the current first temperature, the current second temperature, the current third temperature, and the current fourth temperature can be used in combination to query the preset control scheme database to find a preset control scheme that can simultaneously meet the operating requirements of the first-stage compressor, the second-stage compressor, the third-stage compressor, and the fourth-stage compressor as a matching target control scheme.

[0184] Furthermore, according to the target control scheme, the compressed air energy storage system can be controlled more accurately to effectively ensure the safe and stable operation of the entire system.

[0185] In some embodiments, see Figure 5 As shown, the above-mentioned target control scheme is determined according to the system constraints, the current first temperature, the current second temperature, the current third temperature, and the current fourth temperature. When specifically implemented, it may include the following contents:

[0186] S1: combining the system constraints, the current first temperature, the current second temperature, the current third temperature, and the current fourth temperature to obtain a corresponding target data set;

[0187] S2: Processing the target data set using a preset control scheme decision model to obtain a corresponding target decision result; wherein the preset control scheme decision model is a neural network model pre-trained through deep reinforcement learning;

[0188] S3: Determine a matching target control plan based on the target decision result.

[0189] The above-mentioned preset control scheme decision model is connected to a preset control scheme database.

[0190] The above-mentioned preset control scheme decision model can be specifically understood as a neural network model that analyzes the knowledge rules accumulated through deep reinforcement learning and determines a matching control scheme based on an input data group that includes system constraints, the current first temperature, the current second temperature, the current third temperature, and the current fourth temperature.

[0191] Based on the above embodiments, a preset control scheme decision model can be used to automatically determine a matching target control scheme efficiently and accurately.

[0192] Before specific implementation, the preset control scheme decision model can be trained in the following manner: collect a large number of historical control records based on close or similar compressed air energy storage systems; screen historical control records with better control effects from the historical control records, and extract system constraints, first temperature, second temperature, third temperature, and corresponding control schemes from the above historical control records to combine and obtain multiple sample data; randomly extract a preset proportion (for example, 30%) of sample data from the multiple sample data, calculate and use the approximation between the control scheme in the sample data and each preset control scheme in the preset control scheme database to mark the sample data to obtain marked sample data; then mix the marked sample data with the unlabeled sample data to construct a sample training set; construct a corresponding initial model; use the above sample training set to perform deep reinforcement learning on the initial model to obtain a preset control scheme decision model that meets the requirements.

[0193] As can be seen from the above, based on the air temperature control method of the compressed air energy storage system provided in the embodiment of this specification, before specific implementation, the structure of the compression section in the compressed air energy storage system is modified accordingly: the first pipeline is used to sequentially connect the rotary preheater, the first compressor, the first cross-flow heat exchanger, the first cross-flow cooler, the first gas-liquid separator, the second compressor, the second cross-flow heat exchanger, the second cross-flow cooler, the second gas-liquid separator, the third compressor, the hairpin heat exchanger, the first U-tube cooler, the third gas-liquid separator, the fourth compressor, the second U-tube cooler, the fourth ... first compressor, the first cross-flow heat exchanger, the first cross-flow cooler, the first cross-flow cooler, the second gas-liquid separator, the fourth compressor, the second U-tube cooler, the first cross-flow cooler, the second cross-flow cooler, the second gas-liquid separator, the third compressor, the hairpin heat exchanger, the first U-tube cooler, the third gas-liquid separator, the fourth compressor, the second U-tube cooler, the first cross-flow cooler, the second cross-flow cooler, the second gas-liquid separator, the third compressor, the second U-tube cooler, the first cooler, a fourth gas-liquid separator, and a gas storage reservoir; at the same time, the second pipeline is used to sequentially connect the heat transfer medium output end of the rotary preheater, the buffer tank, the booster pump, the second U-tube cooler, and the heat transfer medium input end of the rotary preheater; and, a first branch provided with a first flow regulating valve, a second branch provided with a second flow regulating valve, and a third branch provided with a third flow regulating valve are respectively used to connect the first cross-flow cooler, the second cross-flow cooler, and the first U-tube cooler to the second pipeline, so that the compression section can be adapted to the subsequent air temperature control.

[0194] In specific implementation, the compressed air energy storage system based on the above structure can first obtain the current temperature of the inlet air of the first-stage compressor as the current first temperature; then use the preset first indicator temperature to detect whether the current first temperature meets the preset operating requirements; if it is determined that the current first temperature does not meet the preset operating requirements, a matching target control scheme is determined based on the current first temperature; and according to the target control scheme, the rotary preheater, the booster pump, the first flow control valve, the second flow control valve, and the third flow control valve are adjusted accordingly.

[0195] This makes it possible to fully utilize the waste heat of the compressor outlet air in the compression section of the compressed air energy storage system, accurately adjust the temperature of the compressor inlet air, so that the temperature of the air entering the compressor meets the preset operating requirements, and thus effectively improve the energy utilization rate of the entire machine while ensuring the safe and stable operation of the compressed air energy storage system.

[0196] This specification provides a computer device, referring to Figure 6 The computer device includes a network communication port 601, a processor 602, and a memory 603, and the above structures are connected through internal cables so that each structure can perform specific data interaction.

[0197] The network communication port 601 may be used to obtain the current temperature of the inlet air of the first compressor as the current first temperature;

[0198] The processor 602 can be specifically used to use a preset first indicator temperature to detect whether the current first temperature meets the preset operating requirements; when it is determined that the current first temperature does not meet the preset operating requirements, a matching target control scheme is determined based on the current first temperature; and according to the target control scheme, the rotary preheater, the booster pump, the first flow control valve, the second flow control valve, and the third flow control valve are adjusted accordingly.

[0199] The memory 603 may be specifically used to store corresponding instruction programs, as well as relevant data such as the current first temperature, the preset first indicator temperature, and the target control scheme.

[0200] Based on the above method, the relevant structural performance of computer equipment can be effectively utilized, the data processing speed of electronic equipment can be improved, and the specific data processing of air temperature control of the compressed air energy storage system can be efficiently realized.

[0201] In this embodiment, the network communication port 601 can be a virtual port that is bound to different communication protocols, thereby being capable of sending or receiving different data. For example, the network communication port can be a port responsible for web data communication, a port responsible for FTP data communication, or a port responsible for email data communication. Furthermore, the network communication port can also be a physical communication interface or communication chip. For example, it can be a wireless mobile network communication chip, such as GSM or CDMA; it can also be a Wi-Fi chip; or it can be a Bluetooth chip.

[0202] In this embodiment, the processor 602 may be implemented in any suitable manner. For example, the processor may take the form of a microprocessor or a processor and a computer-readable medium storing computer-readable program code (e.g., software or firmware) executable by the (micro)processor, a logic gate, a switch, an application-specific integrated circuit (ASIC), a programmable logic controller, an embedded microcontroller, etc. This specification is not intended to limit this.

[0203] In this embodiment, the memory 603 may include multiple levels. In a digital system, anything that can store binary data can be a memory. In an integrated circuit, a circuit with a storage function that has no physical form is also called a memory, such as RAM, FIFO, etc. In a system, a storage device with a physical form is also called a memory, such as a memory stick, TF card, etc.

[0204] An embodiment of this specification also provides a computer-readable storage medium for an air temperature control method based on the above-mentioned compressed air energy storage system, wherein the computer-readable storage medium stores computer program instructions, and when the computer program instructions are executed, the following steps are implemented: obtaining the current temperature of the inlet air of the first-stage compressor as the current first temperature; using a preset first indicator temperature, detecting whether the current first temperature meets the preset operating requirements; if it is determined that the current first temperature does not meet the preset operating requirements, determining a matching target control scheme based on the current first temperature; and making corresponding adjustments to the rotary preheater, the booster pump, the first flow control valve, the second flow control valve, and the third flow control valve based on the target control scheme.

[0205] In this embodiment, the storage medium includes, but is not limited to, random access memory (RAM), read-only memory (ROM), cache, hard disk drive (HDD), or memory card. The memory can be used to store computer program instructions. The network communication unit can be an interface configured in accordance with the standards specified by the communication protocol for network connection communication.

[0206] In this embodiment, the functions and effects specifically implemented by the program instructions stored in the computer-readable storage medium can be explained in comparison with other implementations and will not be repeated here.

[0207] An embodiment of the present specification also provides a computer program product, which at least includes a computer program, and when the computer program is executed by a processor, implements the following method steps: obtaining the current temperature of the inlet air of the first-stage compressor as the current first temperature; using a preset first indicator temperature, detecting whether the current first temperature meets the preset operating requirements; when it is determined that the current first temperature does not meet the preset operating requirements, determining a matching target control scheme based on the current first temperature; and making corresponding adjustments to the rotary preheater, the booster pump, the first flow control valve, the second flow control valve, and the third flow control valve based on the target control scheme.

[0208] See Figure 7 As shown, the embodiment of this specification also provides an air temperature control device for a compressed air energy storage system, which is applied to a compressed air energy storage system, wherein the compressed air energy storage system includes at least a compression section and an expansion section;

[0209] The compression section at least includes: a first pipeline and a second pipeline; along the first pipeline, a rotary preheater, a first-stage compressor, a first cross-flow heat exchanger, a first cross-flow cooler, a first gas-liquid separator, a second-stage compressor, a second cross-flow heat exchanger, a second cross-flow cooler, a second gas-liquid separator, a third-stage compressor, a hairpin heat exchanger, a first U-shaped tube cooler, a third gas-liquid separator, a fourth-stage compressor, a second U-shaped tube cooler, and a fourth gas-liquid separator are sequentially connected; along the second pipeline, a heat transfer medium output end of the rotary preheater, a buffer tank, a booster pump, a second U-shaped tube cooler, and a heat transfer medium input end of the rotary preheater are sequentially connected;

[0210] The first cross-flow cooler, the second cross-flow cooler, and the first U-tube cooler are connected to the second pipeline through the first branch, the second branch, and the third branch, respectively; and the first branch, the second branch, and the third branch are respectively provided with a corresponding first flow regulating valve, a second flow regulating valve, and a third flow regulating valve; the first cross-flow heat exchanger, the second cross-flow heat exchanger, and the hairpin heat exchanger are respectively associated with the expansion section; the device may specifically include the following structural modules:

[0211] The acquisition module 701 may be specifically configured to acquire the current temperature of the inlet air of the first compressor as the current first temperature;

[0212] The detection module 702 may be specifically configured to use a preset first indicator temperature to detect whether the current first temperature meets a preset operating requirement;

[0213] The determination module 703 may be specifically configured to determine a matching target control scheme based on the current first temperature when it is determined that the current first temperature does not meet the preset operating requirements;

[0214] The adjustment module 704 may be specifically configured to adjust the rotary preheater, the booster pump, the first flow regulating valve, the second flow regulating valve, and the third flow regulating valve accordingly according to the target control scheme.

[0215] In some embodiments, when the current first temperature is lower than a preset first index temperature and the difference between the preset first index temperature and the current first temperature is greater than or equal to a first difference value, the adjustment module 704 may be implemented to adjust the rotary preheater, the booster pump, the first flow control valve, the second flow control valve, and the third flow control valve accordingly according to the target control scheme in the following manner: adjusting the power of the booster pump according to the target control scheme; obtaining a first updated first temperature; detecting whether the difference between the preset first index temperature and the first updated first temperature is lower than the first difference value; if it is determined that the difference between the preset first index temperature and the first updated first temperature is lower than the first difference value, adjusting the angle of the heat exchange surface of the rotary preheater; obtaining a second updated first temperature; detecting whether the difference between the preset first index temperature and the second updated first temperature is lower than the second difference value; if it is determined that the difference between the preset first index temperature and the second updated first temperature is lower than the second difference value, adjusting the third flow control valve, the second flow control valve, and / or the first flow control valve in sequence so that the difference between the preset first index temperature and the third updated first temperature is lower than a preset tolerance threshold.

[0216] In some embodiments, when the current first temperature is lower than the preset first index temperature, and the difference between the preset first index temperature and the current first temperature is lower than the first difference value and greater than or equal to the second difference value, when the above-mentioned adjustment module 704 is implemented, the rotary preheater, the booster pump, the first flow control valve, the second flow control valve, and the third flow control valve can be adjusted accordingly according to the target control scheme in the following manner: according to the target control scheme, the angle of the heat exchange surface of the rotary preheater is adjusted; and the second updated first temperature is obtained; it is detected whether the difference between the preset first index temperature and the second updated first temperature is lower than the second difference value; when it is determined that the difference between the preset first index temperature and the second updated first temperature is lower than the second difference value, the third flow control valve, the second flow control valve and / or the first flow control valve are adjusted in sequence so that the difference between the preset first index temperature and the third updated first temperature is lower than or equal to the preset tolerance threshold.

[0217] In some embodiments, when the current first temperature is lower than the preset first index temperature, and the difference between the preset first index temperature and the current first temperature is lower than the second difference value and greater than or equal to the set tolerance threshold, the above-mentioned adjustment module 704 may be implemented in accordance with the target control scheme in the following manner to adjust the rotary preheater, the booster pump, the first flow control valve, the second flow control valve, and the third flow control valve accordingly: according to the target control scheme, the third flow control valve, the second flow control valve and / or the first flow control valve are adjusted in sequence so that the difference between the preset first index temperature and the third updated first temperature is lower than or equal to the preset tolerance threshold.

[0218] In some embodiments, when the above-mentioned device is implemented, it can also be used to obtain the current temperature of the inlet air of the second-stage compressor as the current second temperature; use the preset second temperature index to detect whether the current second temperature meets the preset operating requirements; if it is determined that the current second temperature does not meet the preset operating requirements, adjust the first flow regulating valve according to the current second temperature and the preset second temperature index.

[0219] In some embodiments, when it is determined that the current first temperature does not meet the preset operating requirements, the device can also be used, when implemented, to: obtain the current temperature of the inlet air of the second-stage compressor as the current second temperature, the current temperature of the inlet air of the third-stage compressor as the current third temperature, and the current temperature of the inlet air of the fourth-stage compressor as the current fourth temperature; jointly use the preset first index temperature, the preset second temperature index, the preset third temperature index, and the preset fourth temperature index to establish system constraints; determine a matching target control scheme based on the system constraints, the current first temperature, the current second temperature, the current third temperature, and the current fourth temperature; and make corresponding adjustments to the rotary preheater, the booster pump, the first flow control valve, the second flow control valve, and the third flow control valve based on the target control scheme.

[0220] In some embodiments, when the above-mentioned device is implemented, a matching target control scheme can be determined based on the system constraints, the current first temperature, the current second temperature, the current third temperature, and the current fourth temperature in the following manner: combining the system constraints, the current first temperature, the current second temperature, the current third temperature, and the current fourth temperature to obtain a corresponding target data group; using a preset control scheme decision model to process the target data group to obtain a corresponding target decision result; wherein the preset control scheme decision model is a neural network model pre-trained through deep reinforcement learning; and determining a matching target control scheme based on the target decision result.

[0221] It should be noted that the units, devices or modules described in the above embodiments can be implemented by computer chips or entities, or by products with certain functions. For the convenience of description, the above devices are described in terms of functions and are divided into various modules and described separately. Of course, when implementing this specification, the functions of each module can be implemented in the same or multiple software and / or hardware, or the module that implements the same function can be implemented by a combination of multiple sub-modules or sub-units. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0222] As can be seen from the above, the air temperature control device of the compressed air energy storage system provided in the embodiment of this specification can fully utilize the waste heat of the compressor outlet air in the compression section of the compressed air energy storage system, accurately adjust the temperature of the compressor inlet air, so that the temperature of the air entering the compressor meets the preset operating requirements, and effectively improve the energy utilization rate of the entire machine while ensuring the safe and stable operation of the compressed air energy storage system.

[0223] Although this specification provides the method operation steps as described in the embodiments or flow charts, more or fewer operation steps may be included based on conventional or non-creative means. The order of steps listed in the embodiments is only one way of executing the order of many steps and does not represent the only execution order. When the device or client product in practice is executed, it can be executed in sequence or in parallel according to the method shown in the embodiments or the drawings (for example, a parallel processor or a multi-threaded processing environment, or even a distributed data processing environment). The term "comprise", "include" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, product or device including a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, product or device. In the absence of more restrictions, it is not excluded that there are other identical or equivalent elements in the process, method, product or device including the elements. Words such as first and second are used to represent names and do not represent any particular order.

[0224] Those skilled in the art will also appreciate that, in addition to implementing the controller in pure computer-readable program code, it is entirely possible to implement the same functionality by logically programming the method steps in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, embedded microcontrollers, and the like. Therefore, such a controller can be considered a hardware component, and the devices included therein for implementing various functions can also be considered structures within the hardware component. Alternatively, the devices for implementing various functions can be considered both software modules implementing the method and structures within the hardware component.

[0225] This specification may be described in the general context of computer-executable instructions, such as program modules, executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, classes, and the like that perform specific tasks or implement specific abstract data types. This specification may also be practiced in distributed computing environments where tasks are performed by remote processing devices connected through a communications network. In a distributed computing environment, program modules may be located in local and remote computer-readable storage media, including storage devices.

[0226] Through the description of the above embodiments, it can be seen that those skilled in the art can clearly understand that this specification can be implemented by means of software plus the necessary general hardware platform. Based on this understanding, the technical solution of this specification can essentially be embodied in the form of a software product. This computer software product can be stored in a storage medium such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a mobile terminal, a server, or a network device, etc.) to execute the methods described in various embodiments or certain parts of the embodiments of this specification.

[0227] Although the present specification has been described through embodiments, those skilled in the art will appreciate that there are many modifications and variations to the present specification without departing from the spirit of the present specification. It is intended that the appended claims include these modifications and variations without departing from the spirit of the present specification.

Claims

1. A method for controlling air temperature of a compressed air energy storage system, characterized in that: Applied to a compressed air energy storage system, the compressed air energy storage system comprising at least a compression section and an expansion section; The compression section at least includes: a first pipeline and a second pipeline; along the first pipeline, there are sequentially connected a rotary preheater, a first-stage compressor, a first cross-flow heat exchanger, a first cross-flow cooler, a first gas-liquid separator, a second-stage compressor, a second cross-flow heat exchanger, a second cross-flow cooler, a second gas-liquid separator, a third-stage compressor, a hairpin heat exchanger, a first U-shaped tube cooler, a third gas-liquid separator, a fourth-stage compressor, a second U-shaped tube cooler, a fourth gas-liquid separator, and a gas storage reservoir; along the second pipeline, there are sequentially connected a heat transfer medium output end of the rotary preheater, a buffer tank, a booster pump, a second U-shaped tube cooler, and a heat transfer medium input end of the rotary preheater; The first cross-flow cooler, the second cross-flow cooler, and the first U-tube cooler are connected to the second pipeline through a first branch, a second branch, and a third branch, respectively; and the first branch, the second branch, and the third branch are respectively provided with a corresponding first flow regulating valve, a second flow regulating valve, and a third flow regulating valve; the first cross-flow heat exchanger, the second cross-flow heat exchanger, and the hairpin heat exchanger are respectively associated with an expansion section; the method includes: obtaining a current temperature of the inlet air of the first-stage compressor as a current first temperature; Using the preset first indicator temperature, detecting whether the current first temperature meets the preset operating requirements; When it is determined that the current first temperature does not meet the preset operating requirements, determining a matching target control scheme based on the current first temperature; According to the target control plan, the rotary preheater, booster pump, first flow control valve, second flow control valve and third flow control valve are adjusted accordingly; When it is determined that the current first temperature does not meet the preset operating requirements, the method further includes: obtaining the current temperature of the inlet air of the second-stage compressor as the current second temperature, the current temperature of the inlet air of the third-stage compressor as the current third temperature, and the current temperature of the inlet air of the fourth-stage compressor as the current fourth temperature; jointly using the preset first index temperature, the preset second temperature index, the preset third temperature index, and the preset fourth temperature index to establish system constraints; determining a matching target control scheme based on the system constraints, the current first temperature, the current second temperature, the current third temperature, and the current fourth temperature; and making corresponding adjustments to the rotary preheater, the booster pump, the first flow control valve, the second flow control valve, and the third flow control valve based on the target control scheme.

2. The method according to claim 1, characterized in that When the current first temperature is lower than the preset first index temperature, and the difference between the preset first index temperature and the current first temperature is greater than or equal to a first difference value, the rotary preheater, the booster pump, the first flow regulating valve, the second flow regulating valve, and the third flow regulating valve are adjusted accordingly according to the target control scheme, including: According to the target control scheme, the power of the booster pump is adjusted; and the first updated first temperature is obtained; detecting whether a difference between a preset first indicator temperature and a first updated first temperature is less than a first difference value; When it is determined that the difference between the preset first index temperature and the first updated first temperature is less than the first difference value, adjusting the angle of the heat exchange surface of the rotary preheater; and obtaining the second updated first temperature; detecting whether a difference between a preset first indicator temperature and a second updated first temperature is less than a second difference value; When it is determined that the difference between the preset first index temperature and the second updated first temperature is less than the second difference value, the third flow control valve, the second flow control valve and / or the first flow control valve are adjusted in sequence so that the difference between the preset first index temperature and the third updated first temperature is less than the preset tolerance threshold.

3. The method according to claim 1, characterized in that When the current first temperature is lower than the preset first index temperature, and the difference between the preset first index temperature and the current first temperature is lower than the first difference value and greater than or equal to the second difference value, the rotary preheater, the booster pump, the first flow control valve, the second flow control valve, and the third flow control valve are adjusted accordingly according to the target control scheme, including: adjusting the angle of the heat exchange surface of the rotary preheater according to the target control scheme; and obtaining the second updated first temperature; detecting whether a difference between a preset first indicator temperature and a second updated first temperature is less than a second difference value; When it is determined that the difference between the preset first index temperature and the second updated first temperature is less than the second difference value, the third flow control valve, the second flow control valve and / or the first flow control valve are adjusted in sequence so that the difference between the preset first index temperature and the third updated first temperature is less than or equal to the preset tolerance threshold.

4. The method according to claim 1, wherein When the current first temperature is lower than the preset first index temperature, and the difference between the preset first index temperature and the current first temperature is lower than the second difference value and greater than or equal to the preset tolerance threshold, the rotary preheater, the booster pump, the first flow control valve, the second flow control valve, and the third flow control valve are adjusted accordingly according to the target control scheme, including: According to the target control scheme, the third flow regulating valve, the second flow regulating valve and / or the first flow regulating valve are adjusted in sequence so that the difference between the preset first indicator temperature and the third updated first temperature is less than or equal to the preset tolerance threshold.

5. The method according to claim 1, wherein The method further comprises: obtaining a current temperature of the inlet air of the second-stage compressor as a current second temperature; Using a preset second temperature indicator, detecting whether the current second temperature meets the preset operating requirements; When it is determined that the current second temperature does not meet the preset operating requirement, the first flow regulating valve is adjusted according to the current second temperature and the preset second temperature index.

6. The method according to claim 1, characterized in that According to the system constraints, the current first temperature, the current second temperature, the current third temperature, and the current fourth temperature, a matching target control scheme is determined, including: Combining the system constraint condition, the current first temperature, the current second temperature, the current third temperature, and the current fourth temperature to obtain a corresponding target data group; Processing the target data set using a preset control scheme decision model to obtain a corresponding target decision result; wherein the preset control scheme decision model is a neural network model pre-trained through deep reinforcement learning; According to the target decision results, a matching target control plan is determined.

7. A compressed air energy storage system using the air temperature control method of a compressed air energy storage system according to any one of claims 1 to 6, characterized in that: At least comprising a compression section and an expansion section; The compression section at least includes: a first pipeline and a second pipeline; along the first pipeline, there are sequentially connected a rotary preheater, a first-stage compressor, a first cross-flow heat exchanger, a first cross-flow cooler, a first gas-liquid separator, a second-stage compressor, a second cross-flow heat exchanger, a second cross-flow cooler, a second gas-liquid separator, a third-stage compressor, a hairpin heat exchanger, a first U-shaped tube cooler, a third gas-liquid separator, a fourth-stage compressor, a second U-shaped tube cooler, a fourth gas-liquid separator, and a gas storage reservoir; along the second pipeline, there are sequentially connected a heat transfer medium output end of the rotary preheater, a buffer tank, a booster pump, a second U-shaped tube cooler, and a heat transfer medium input end of the rotary preheater; The first cross-flow cooler, the second cross-flow cooler, and the first U-tube cooler are connected to the second pipeline through the first branch, the second branch, and the third branch, respectively; and the first branch, the second branch, and the third branch are respectively provided with corresponding first flow regulating valves, second flow regulating valves, and third flow regulating valves; the first cross-flow heat exchanger, the second cross-flow heat exchanger, and the hairpin heat exchanger are respectively associated with the expansion section.

8. An air temperature control device for a compressed air energy storage system, characterized in that: Applied to a compressed air energy storage system, the compressed air energy storage system comprising at least a compression section and an expansion section; The compression section at least includes: a first pipeline and a second pipeline; along the first pipeline, a rotary preheater, a first-stage compressor, a first cross-flow heat exchanger, a first cross-flow cooler, a first gas-liquid separator, a second-stage compressor, a second cross-flow heat exchanger, a second cross-flow cooler, a second gas-liquid separator, a third-stage compressor, a hairpin heat exchanger, a first U-shaped tube cooler, a third gas-liquid separator, a fourth-stage compressor, a second U-shaped tube cooler, and a fourth gas-liquid separator are sequentially connected; along the second pipeline, a heat transfer medium output end of the rotary preheater, a buffer tank, a booster pump, a second U-shaped tube cooler, and a heat transfer medium input end of the rotary preheater are sequentially connected; The first cross-flow cooler, the second cross-flow cooler, and the first U-tube cooler are connected to the second pipeline through the first branch, the second branch, and the third branch, respectively; and the first branch, the second branch, and the third branch are respectively provided with a corresponding first flow regulating valve, a second flow regulating valve, and a third flow regulating valve; the first cross-flow heat exchanger, the second cross-flow heat exchanger, and the hairpin heat exchanger are respectively associated with the expansion section; the device includes: an acquisition module, configured to acquire a current temperature of the inlet air of the first-stage compressor as a current first temperature; A detection module, configured to detect whether the current first temperature meets the preset operating requirements using the preset first indicator temperature; a determination module, configured to determine a matching target control scheme based on the current first temperature when it is determined that the current first temperature does not meet the preset operating requirements; An adjustment module, configured to adjust the rotary preheater, the booster pump, the first flow regulating valve, the second flow regulating valve, and the third flow regulating valve accordingly according to a target control scheme; When it is determined that the current first temperature does not meet the preset operating requirements, the device is also used to: obtain the current temperature of the inlet air of the second-stage compressor as the current second temperature, the current temperature of the inlet air of the third-stage compressor as the current third temperature, and the current temperature of the inlet air of the fourth-stage compressor as the current fourth temperature; jointly use the preset first index temperature, the preset second temperature index, the preset third temperature index, and the preset fourth temperature index to establish system constraints; determine a matching target control scheme based on the system constraints, the current first temperature, the current second temperature, the current third temperature, and the current fourth temperature; and make corresponding adjustments to the rotary preheater, the booster pump, the first flow control valve, the second flow control valve, and the third flow control valve based on the target control scheme.

9. A computer-readable storage medium, characterized in that Computer instructions are stored thereon, and when the instructions are executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

Images