A method for estimating the volume of an underground artificial chamber of a compressed air energy storage power station

Abstract

The present application relates to the technical field of renewable energy storage, in particular to a method for estimating the volume of an underground artificial cavern of a compressed air energy storage power station, which comprises: inputting a determined initial volume of the artificial cavern into a pre-constructed energy storage capacity model to obtain a first power generation of an expander in the compressed air energy storage power station; if the absolute value of the difference between the first power generation and a preset power generation is less than a preset threshold, taking the initial volume as a target volume of the artificial cavern; otherwise, correcting the initial volume and inputting the corrected initial volume into the energy storage capacity model until the absolute value of the new difference is less than the preset threshold. Thus, the problem that the operation efficiency of the compressed air energy storage power station is affected due to the unsuitable volume of the artificial cavern is solved, and the target volume of the artificial cavern is determined through the energy storage capacity model of the compressed air energy storage power station and the pre-set rated power generation capacity, so as to improve the accuracy of the volume of the artificial cavern and ensure the operation efficiency of the compressed air energy storage power station.

Description

Technical Field

[0001] This invention relates to the field of renewable energy storage technology, and in particular to a method for estimating the volume of an underground artificial chamber in a compressed air energy storage power station. Background Technology

[0002] Compressed air energy storage technology is characterized by large energy storage capacity, long energy storage time, and zero carbon emissions. It is one of the most promising energy storage technologies at present. This energy storage technology can effectively solve the grid connection fluctuation problem caused by the inherent intermittency and uncertainty of photovoltaic and wind power generation, thereby improving the renewable energy absorption rate. It is a key technology for achieving "carbon peaking" and "carbon neutrality".

[0003] In related technologies, compressed air energy storage power stations typically use salt caverns or artificial chambers as gas storage facilities. Salt caverns offer advantages such as large scale, low construction cost, and small pressure variation range, but their site selection is significantly affected by geographical conditions. Artificial chambers can effectively reduce the dependence of power station site selection on geographical conditions; however, the volume of artificial chambers affects the overall operating efficiency of the compressed air energy storage power station, and the cost of artificial chambers for the same volume is much higher than that of salt caverns. Therefore, if the volume of artificial chambers is inappropriate, it will reduce the operating efficiency of the compressed air energy storage power station and increase the overall construction cost, which urgently needs to be addressed. Summary of the Invention

[0004] This invention provides a method for estimating the volume of underground artificial chambers in compressed air energy storage power stations, in order to solve problems such as the impact on the operating efficiency of compressed air energy storage power stations due to unsuitable artificial chamber volumes.

[0005] A first aspect of the present invention provides a method for estimating the volume of an underground artificial chamber in a compressed air energy storage power station, comprising the following steps:

[0006] Determine the initial volume of the artificial chamber;

[0007] The initial volume is input into a pre-built energy storage capacity model to obtain the first power generation of the expander in the compressed air energy storage power station, and it is determined whether the absolute value of the difference between the first power generation and the preset power generation is less than a preset threshold. The pre-built energy storage capacity model is constructed based on the operating parameters of the compressed air energy storage power station.

[0008] If the absolute value of the difference between the first power generation and the preset power generation is less than the preset threshold, then the initial volume is used as the target volume of the artificial chamber; otherwise, the initial volume is corrected, and the corrected initial volume is re-inputted into the pre-built energy storage capacity model until the new absolute value is less than the preset threshold.

[0009] According to one embodiment of the present invention, before inputting the initial volume into the pre-built energy storage capacity model, the method further includes:

[0010] Obtain the operating parameters of the compressed air energy storage power station;

[0011] The temperature-pressure change curve of the air inside the artificial chamber is calculated using the operating parameters and the thermodynamic model of the artificial chamber. Based on the temperature-pressure change curve, the target power generation time of the expander and the power generation of the expander within the target power generation time are obtained. The power generation of the expander is integrated to obtain the energy storage capacity model of the artificial chamber.

[0012] According to one embodiment of the present invention, the power generation model formula of the expander is:

[0013]

[0014] The formula for the temperature-pressure change curve is:

[0015]

[0016] The energy storage capacity model formula for the artificial chamber is as follows:

[0017]

[0018] Where P is the power output of the expander at time t, and g is the expander's... η is the mass flow rate of air passing through the expander. G Here, G represents the expansion mechanical losses and generator efficiency correction factors, i represents the number of expansion stages, N represents the total number of expansion stages, and T represents the total number of expansion stages. in,i Let T be the inlet temperature of the i-th stage expander at time t. out,i Let c be the exhaust temperature of the i-th stage expander at time t. p Let ρ be the specific heat capacity of air at constant pressure, p be the air pressure, ε be the efficiency of the heat exchanger on the generator side, and T be the specific heat capacity of air at constant pressure. air η represents the temperature of the air in the artificial chamber during the venting phase. i Let β be the isentropic efficiency of the i-th stage turbine. i For the expansion ratio, T HES HES represents the temperature of the high-temperature thermal storage tank, k represents the air insulation coefficient, and t represents the temperature of the high-temperature thermal storage tank. g For the power generation duration of the expander, P g This is a generator expansion model.

[0019] According to one embodiment of the present invention, before calculating the temperature-pressure change curve of the air inside the artificial chamber using the operating parameters and the thermodynamic model of the artificial chamber, the method further includes:

[0020] The difference in air mass flow rate entering and exiting the artificial chamber, the change in air enthalpy, and the heat flux entering and exiting the artificial chamber are obtained.

[0021] The rate of change of the air storage volume in the artificial cavern is obtained based on the air mass flow rate difference, and the change of the internal energy of the air in the artificial cavern is obtained based on the change of air enthalpy and the heat flux.

[0022] The thermodynamic model of the artificial chamber is obtained based on the rate of change of the air storage volume and the change of the internal energy of the air.

[0023] According to one embodiment of the present invention, calculating the temperature-pressure change curve of the air inside the artificial chamber using the operating parameters and the thermodynamic model of the artificial chamber includes:

[0024] Based on the thermodynamic model of the artificial chamber, the gas state equation of the artificial chamber is differentiated to obtain the air temperature-pressure differential equation of the artificial chamber.

[0025] The temperature-pressure variation curve of the air inside the artificial cavern is obtained based on the operating parameters and the air temperature-pressure differential equation.

[0026] According to one embodiment of the present invention, obtaining the target power generation duration of the expander and the power generation capacity of the expander within the target power generation duration based on the temperature-pressure change curve includes:

[0027] The target temperature and target pressure data of the air in the artificial chamber within the target power generation duration are obtained based on the temperature-pressure change curve.

[0028] The power generation capacity of the expander within the target power generation time is calculated using the power generation model of the expander, the target temperature data, and the target pressure data.

[0029] According to an embodiment of the present invention, a method for estimating the volume of an underground artificial chamber in a compressed air energy storage power station involves inputting the determined initial volume of the artificial chamber into a pre-built energy storage capacity model to obtain the first power generation of the expander within the compressed air energy storage power station. If the absolute value of the difference between the first power generation and a preset power generation is less than a preset threshold, the initial volume is taken as the target volume of the artificial chamber. Otherwise, the initial volume is corrected and re-inputted into the energy storage capacity model until a new absolute value is less than the preset threshold. This solves the problem of unsuitable artificial chamber volume affecting the operating efficiency of the compressed air energy storage power station. By determining the target volume of the artificial chamber using the energy storage capacity model of the compressed air energy storage power station and a pre-set rated power generation capacity, the accuracy of the artificial chamber volume is improved, thereby ensuring the operating efficiency of the compressed air energy storage power station.

[0030] A second aspect of the present invention provides a device for estimating the volume of an underground artificial chamber in a compressed air energy storage power station, comprising:

[0031] A determining module is used to determine the initial volume of the artificial chamber;

[0032] The judgment module is used to input the initial volume into the pre-built energy storage capacity model to obtain the first power generation of the expander in the compressed air energy storage power station, and to determine whether the absolute value of the difference between the first power generation and the preset power generation is less than a preset threshold. The pre-built energy storage capacity model is constructed based on the operating parameters of the compressed air energy storage power station.

[0033] The correction module is used to take the initial volume as the target volume of the artificial chamber if the absolute value of the difference between the first power generation and the preset power generation is less than the preset threshold; otherwise, the initial volume is corrected and the corrected initial volume is re-inputted into the pre-built energy storage capacity model until the new absolute value is less than the preset threshold.

[0034] According to an embodiment of the present invention, before inputting the initial volume into the pre-built energy storage capacity model, the determination module further includes:

[0035] The acquisition unit is used to acquire the operating parameters of the compressed air energy storage power station;

[0036] The calculation unit is used to calculate the temperature-pressure change curve of the air inside the artificial chamber using the operating parameters and the thermodynamic model of the artificial chamber, obtain the target power generation time of the expander and the power generation of the expander within the target power generation time based on the temperature-pressure change curve, and integrate the power generation of the expander to obtain the energy storage capacity model of the artificial chamber.

[0037] According to one embodiment of the present invention, the power generation model formula of the expander is:

[0038]

[0039] The formula for the temperature-pressure change curve is:

[0040]

[0041] The energy storage capacity model formula for the artificial chamber is as follows:

[0042]

[0043] Where P is the power output of the expander at time t, and g is the expander's... η is the mass flow rate of air passing through the expander.G Here, G represents the expansion mechanical losses and generator efficiency correction factors, i represents the number of expansion stages, N represents the total number of expansion stages, and T represents the total number of expansion stages. in,i Let T be the inlet temperature of the i-th stage expander at time t. out,i Let c be the exhaust temperature of the i-th stage expander at time t. p Let ρ be the specific heat capacity of air at constant pressure, p be the air pressure, ε be the efficiency of the heat exchanger on the generator side, and T be the specific heat capacity of air at constant pressure. air η represents the temperature of the air in the artificial chamber during the venting phase. i Let β be the isentropic efficiency of the i-th stage turbine. i For the expansion ratio, T HES HES represents the temperature of the high-temperature thermal storage tank, k represents the air insulation coefficient, and t represents the temperature of the high-temperature thermal storage tank. g For the power generation duration of the expander, P g This is a generator expansion model.

[0044] According to one embodiment of the present invention, before calculating the temperature-pressure change curve of the air inside the artificial chamber using the operating parameters and the thermodynamic model of the artificial chamber, the calculation unit further includes:

[0045] The first acquisition subunit is used to acquire the difference in air mass flow rate entering and exiting the artificial chamber, the change in air enthalpy and heat flux entering and exiting the artificial chamber;

[0046] The second acquisition subunit is used to obtain the rate of change of the air storage in the artificial cavern based on the air mass flow rate difference, and to obtain the change of the internal energy of the air in the artificial cavern based on the change of air enthalpy and the heat flux.

[0047] The third acquisition subunit is used to obtain the thermodynamic model of the artificial chamber based on the rate of change of the air storage volume and the change of the internal energy of the air.

[0048] According to one embodiment of the present invention, the computing unit includes:

[0049] Micro-molecular units are used to differentiate the gas state equation of the artificial chamber based on the thermodynamic model of the artificial chamber, so as to obtain the air temperature-pressure differential equation of the artificial chamber.

[0050] The fourth acquisition subunit is used to obtain the temperature-pressure change curve of the air in the artificial cave based on the operating parameters and the air temperature-pressure differential equation.

[0051] According to one embodiment of the present invention, the computing unit includes:

[0052] The fifth acquisition subunit is used to acquire the target temperature data and target pressure data of the air in the artificial chamber within the target power generation duration based on the temperature-pressure change curve.

[0053] The calculation subunit is used to calculate the power generation of the expander within the target power generation time using the power generation model of the expander, the target temperature data, and the target pressure data.

[0054] According to an embodiment of the present invention, an underground artificial chamber volume estimation device for a compressed air energy storage power station inputs the determined initial volume of the artificial chamber into a pre-constructed energy storage capacity model to obtain the first power generation of the expander in the compressed air energy storage power station. If the absolute value of the difference between the first power generation and the preset power generation is less than a preset threshold, the initial volume is taken as the target volume of the artificial chamber; otherwise, the initial volume is corrected and re-inputted into the energy storage capacity model until the new absolute value is less than the preset threshold. This solves the problem of unsuitable artificial chamber volume affecting the operating efficiency of the compressed air energy storage power station. By determining the target volume of the artificial chamber through the energy storage capacity model of the compressed air energy storage power station and the preset rated power generation capacity, the accuracy of the artificial chamber volume is improved, thereby ensuring the operating efficiency of the compressed air energy storage power station.

[0055] A third aspect of the present invention provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement a method for estimating the volume of an underground artificial chamber in a compressed air energy storage power station as described in the above embodiments.

[0056] A fourth aspect of the present invention provides a computer-readable storage medium storing computer instructions for causing the computer to execute a method for estimating the volume of an underground artificial chamber in a compressed air energy storage power station as described in the above embodiments.

[0057] A fifth aspect of the present invention provides a computer program product, including a computer program / instructions that, when executed by a processor, implement the steps of the method described in the above embodiments.

[0058] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0059] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0060] Figure 1A flowchart illustrating a method for estimating the volume of an underground artificial chamber in a compressed air energy storage power station according to an embodiment of the present invention;

[0061] Figure 2 This is an overall flowchart of a method for estimating the volume of an underground artificial chamber in a compressed air energy storage power station according to an embodiment of the present invention.

[0062] Figure 3 A block diagram illustrating an underground artificial chamber volume estimation device for a compressed air energy storage power station according to an embodiment of the present invention;

[0063] Figure 4 This is a schematic diagram of the structure of an electronic device according to an embodiment of the present invention.

[0064] Explanation of reference numerals in the attached drawings: 10 - A device for estimating the volume of an underground artificial chamber in a compressed air energy storage power station; 100 - Determination module; 200 - Judgment module; 300 - Correction module. Detailed Implementation

[0065] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0066] The following describes a method for estimating the volume of an underground artificial chamber in a compressed air energy storage power station according to an embodiment of the present invention, with reference to the accompanying drawings. Addressing the problem mentioned in the background art where an unsuitable artificial chamber volume affects the operating efficiency of a compressed air energy storage power station, the present invention provides a method for estimating the volume of an underground artificial chamber in a compressed air energy storage power station. In this method, the determined initial volume of the artificial chamber is input into a pre-constructed energy storage capacity model to obtain the first power generation of the expander within the compressed air energy storage power station. If the absolute value of the difference between the first power generation and a preset power generation is less than a preset threshold, the initial volume is taken as the target volume of the artificial chamber. Otherwise, the initial volume is corrected and re-inputted into the energy storage capacity model until a new absolute value is less than the preset threshold. This solves the problem of unsuitable artificial chamber volume affecting the operating efficiency of a compressed air energy storage power station. By determining the target volume of the artificial chamber using the energy storage capacity model of the compressed air energy storage power station and a pre-set rated power generation capacity, the accuracy of the artificial chamber volume is improved, thereby ensuring the operating efficiency of the compressed air energy storage power station.

[0067] Specifically, Figure 1 This is a flowchart illustrating a method for estimating the volume of an underground artificial chamber in a compressed air energy storage power station, as provided in an embodiment of the present invention.

[0068] like Figure 1 As shown, the method for estimating the volume of an underground artificial chamber in a compressed air energy storage power station includes the following steps:

[0069] In step S101, the initial volume of the artificial chamber is determined.

[0070] Specifically, in order to ensure that the volume of the artificial chamber can optimize the operating efficiency of the compressed air energy storage power station, this embodiment of the invention requires accurate estimation of the volume of the artificial chamber to avoid affecting the operating efficiency of the compressed air energy storage power station due to an unsuitable volume of the artificial chamber. Therefore, this embodiment of the invention can first set the initial volume V of the artificial chamber based on historical construction experience or historical construction data, which can be set as V = V0, so as to make subsequent accurate estimations based on the initial volume.

[0071] In step S102, the initial volume is input into the pre-built energy storage capacity model to obtain the first power generation of the expander in the compressed air energy storage power station, and it is determined whether the absolute value of the difference between the first power generation and the preset power generation is less than the preset threshold. The pre-built energy storage capacity model is constructed based on the operating parameters of the compressed air energy storage power station.

[0072] According to one embodiment of the present invention, before inputting the initial volume into the pre-constructed energy storage capacity model, the method further includes: obtaining the operating parameters of the compressed air energy storage power station; calculating the temperature-pressure change curve of the air inside the artificial chamber using the operating parameters and the thermodynamic model of the artificial chamber; obtaining the target power generation time of the expander and the power generation of the expander within the target power generation time based on the temperature-pressure change curve; and integrating the power generation of the expander to obtain the energy storage capacity model of the artificial chamber.

[0073] According to one embodiment of the present invention, before calculating the temperature-pressure change curve of the air inside the artificial chamber using operating parameters and a thermodynamic model of the artificial chamber, the method further includes: obtaining the difference in air mass flow rate entering and leaving the artificial chamber, the change in air enthalpy, and the heat flux; obtaining the rate of change of air storage volume inside the artificial chamber based on the difference in air mass flow rate, and obtaining the change in internal energy of the air inside the artificial chamber based on the change in air enthalpy and the heat flux; and obtaining the thermodynamic model of the artificial chamber based on the rate of change of air storage volume and the change in internal energy of the air.

[0074] According to one embodiment of the present invention, the temperature-pressure change curve of the air inside the artificial chamber is calculated using operating parameters and a thermodynamic model of the artificial chamber, including: differentiating the gas state equation of the artificial chamber based on the thermodynamic model of the artificial chamber to obtain the differential equation of air temperature-pressure of the artificial chamber; and obtaining the temperature-pressure change curve of the air inside the artificial chamber according to the operating parameters and the differential equation of air temperature-pressure.

[0075] The preset power generation and preset threshold can be set by those skilled in the art based on the operating efficiency of the compressed air energy storage power station, or obtained through a limited number of calculations and simulations, and are not specifically limited here.

[0076] Specifically, in order to improve the volume accuracy of the artificial chamber, this embodiment of the invention requires the construction of a corresponding energy storage capacity model, so as to obtain the target volume of the artificial chamber from the initial volume of the artificial chamber using the energy storage capacity model.

[0077] Specifically, such as Figure 2 As shown, firstly, embodiments of the present invention can obtain the operating parameters of a compressed air energy storage power station based on energy storage requirements and the parameters of supporting core equipment. For example, the rated power generation capacity S R Lower limit of operating pressure p min Operating pressure limit p max Rated inflation mass flow rate Rated venting mass flow rate Rated settling time High temperature storage tank temperature T HES Secondly, a thermodynamic model of the artificial chamber is constructed based on its working principle. The temperature-pressure change curve of the air inside the artificial chamber is calculated using the obtained operating parameters and the thermodynamic model. Finally, the target power generation time of the expander and the power generation of the expander within the target power generation time are obtained based on the temperature-pressure change curve. The power generation of the expander is then integrated to obtain the total power generation of the expander, which is the energy storage capacity model of the artificial chamber.

[0078] Specifically, in this embodiment of the invention, the difference in air mass flow rate entering and exiting the artificial chamber, the change in air enthalpy, and the heat flux are obtained. According to the law of conservation of mass, the rate of change of air storage in the artificial chamber should be equal to the difference in air mass flow rate entering and exiting the chamber, and the change in internal energy of the air in the artificial chamber should be equal to the change in air enthalpy and the heat flux. Therefore, a thermodynamic model of the artificial chamber is obtained based on the rate of change of air storage and the change in internal energy of the air. The formula for the rate of change of air storage in the artificial chamber can be expressed as:

[0079]

[0080] The formula for the change in internal energy of air inside an artificial cavern can be expressed as:

[0081]

[0082] in, The mass flow rate of air flowing into the artificial chamber during the compression stage. h represents the mass flow rate of air exiting the artificial chamber during the expansion phase.in h is the specific enthalpy of the air flowing in during the compression stage. out Let u be the specific enthalpy of the air flowing out during the expansion phase, and h be the specific internal energy of the compressed air. w A is the heat transfer coefficient between the artificial chamber and the surrounding rock. w T represents the interior surface area of ​​the artificial cavern. rw T represents the temperature of the rock wall in the artificial cavern, and T represents the air temperature.

[0083] Furthermore, in this embodiment of the invention, the gas state equation of the artificial chamber is substituted into the thermodynamic model of the artificial chamber for differentiation to obtain the air temperature-pressure differential equation of the artificial chamber. Then, based on the operating parameters and the air temperature-pressure differential equation, the temperature-pressure change curve of the air inside the artificial chamber is obtained. The gas state equation of the artificial chamber can be expressed as:

[0084] pV = ZmRT

[0085] Where R is the gas constant and Z is the gas compressibility factor. Analysis of operational data from existing compressed air energy storage power stations shows that the air's behavior within the artificial chamber is similar to that of an ideal gas. Therefore, to simplify calculations, the influence of the gas compressibility factor on the air can be ignored, and we set Z = 1. We assume the specific heat capacity of air at constant pressure is c. p Since is a constant, and combining this with the thermodynamic model of the artificial chamber described above, the differential equation for the temperature-pressure change curve of the air inside the artificial chamber can be expressed as:

[0086]

[0087] Among them, h w A is the heat transfer coefficient between the artificial chamber and the surrounding rock. w T represents the interior surface area of ​​the artificial cavern. rw T represents the temperature of the rock wall in the artificial chamber, and T represents the air temperature. The mass flow rate of air flowing into the artificial chamber during the compression stage. c represents the mass flow rate of air exiting the artificial chamber during the expansion phase. p T is the specific heat capacity of air at constant pressure. in Let V be the inlet air temperature of the gas storage tank, R be the volume of the artificial chamber, p be the air pressure, t be the time, and k be the air adiabatic coefficient. Preferably, in this embodiment of the invention, k is taken as 1.4. The temperature of the artificial chamber rock wall is T. rw Since it is a time variable, its value can be calculated using the one-dimensional heat conduction equation, as shown in the following equation:

[0088]

[0089] Where, ρ s For the density of the rock, c p,s For the specific heat capacity of the rock, cp Let be the specific heat capacity of air at constant pressure, s be the rock, w be the boundary between the surrounding rock and the chamber, p be the air pressure, r be the distance to the center of the artificial chamber, and T be... s Let r be the temperature of the surrounding rock at radius r at time t. w The radius of the artificial chamber is represented by T0, where T0 is the ambient temperature and k is the kJ / m³. s h is the thermal conductivity of the rock. w The heat transfer coefficient between the artificial chamber and the surrounding rock is T, where T is the air temperature. rw This refers to the temperature of the rock wall in the artificial cavern.

[0090] Furthermore, in this embodiment of the invention, the temperature-pressure change curve of the entire process of air compression-expansion in the artificial chamber is obtained based on the operating parameters and the air temperature-pressure differential equation. The working process of air compression-expansion in the artificial chamber is as follows:

[0091] Specifically, in this embodiment of the invention, the air compression process in the artificial chamber is carried out at a rated inflation mass flow rate. Inflation occurs when the air pressure in the artificial chamber rises from the lower operating pressure limit p. min Rise to the upper limit of operating pressure p max When compression stops, after a settling time... Subsequently, due to heat exchange between the air and the surrounding rock of the artificial chamber, the actual pressure and temperature deviated from their maximum values. These actual pressure and temperature were then used as the initial pressure and temperature values ​​for the expansion and venting stage, based on the rated venting mass flow rate. Release the pressure until it drops to the lower limit of the operating pressure p. min At that time, power generation ceased.

[0092] According to one embodiment of the present invention, obtaining the target power generation duration and the power generation capacity of the expander within the target power generation duration based on the temperature-pressure change curve includes: acquiring target temperature data and target pressure data of the air in the artificial chamber within the target power generation duration based on the temperature-pressure change curve; and calculating the power generation capacity of the expander within the target power generation duration using the expander's power generation model, the target temperature data, and the target pressure data.

[0093] Specifically, in this embodiment of the invention, the target power generation time of the expander and the power generation of the expander within the target power generation time are obtained based on the temperature-pressure change curve of the air in the artificial chamber obtained above, and the real-time power generation of the compressed air energy storage power station is calculated in combination with the power generation model of the expander.

[0094] Specifically, firstly, based on the obtained temperature-pressure change curves, target temperature and pressure data of the air in the artificial chamber are acquired within the target power generation duration. Then, using the expander's power generation model, the target temperature data, and the target pressure data, the power generation of the expander within the target power generation duration is calculated. The power generation of the expander is then integrated to obtain the total power generation of the expander. Finally, based on the total power generation, a pre-constructed energy storage capacity model of the artificial chamber is obtained. The formula for the expander's power generation model is:

[0095]

[0096] The formula for the temperature-pressure change curve is:

[0097]

[0098] The formula for the energy storage capacity model of an artificial chamber is:

[0099]

[0100] Where P is the power output of the expander at time t, and g is the expander's... η is the mass flow rate of air passing through the expander. G Here, G represents the expansion mechanical losses and generator efficiency correction factors, i represents the number of expansion stages, N represents the total number of expansion stages, and T represents the total number of expansion stages. in,i Let T be the inlet temperature of the i-th stage expander at time t. out,i Let c be the exhaust temperature of the i-th stage expander at time t. p Let ρ be the specific heat capacity of air at constant pressure, p be the air pressure, ε be the efficiency of the heat exchanger on the generator side, and T be the specific heat capacity of air at constant pressure. air η represents the temperature of the air in the artificial chamber during the venting phase. i Let β be the isentropic efficiency of the i-th stage turbine. i For the expansion ratio, T HES HES represents the temperature of the high-temperature thermal storage tank, k represents the air insulation coefficient, and t represents the temperature of the high-temperature thermal storage tank. g For the power generation duration of the expander, P g This is a generator expansion model.

[0101] Furthermore, in this embodiment of the invention, based on a pre-built energy storage capacity model obtained through calculation, the initial volume V of the aforementioned artificial chamber is input into the pre-built energy storage capacity model to obtain the first power generation S of the expander in the compressed air energy storage power station, and the first power generation S is further compared with the preset power generation S. R That is, the absolute value of the difference between the rated power generation and the preset threshold is used to determine the target volume of the artificial chamber.

[0102] In step S103, if the absolute value of the difference between the first power generation and the preset power generation is less than the preset threshold, the initial volume is used as the target volume of the artificial chamber; otherwise, the initial volume is corrected and the corrected initial volume is re-inputted into the pre-built energy storage capacity model until the new absolute value is less than the preset threshold.

[0103] Specifically, if the absolute value of the difference between the first power generation of the expander in the compressed air energy storage power station calculated above and the preset power generation is less than the preset threshold, i.e., |S R -S|<∈, at this time, based on the absolute value of the difference between the first power generation and the preset power generation, we can obtain that the volume of the artificial chamber is suitable for the optimized operation of the compressed air energy storage power station and will not affect the operating efficiency of the compressed air energy storage power station. Therefore, the set initial volume can be used as the target volume of the artificial chamber, and the volume estimation process ends.

[0104] Furthermore, if the absolute value of the difference between the first power generation and the preset power generation is greater than or equal to a preset threshold, i.e., |S R -S|≥∈ indicates that the volume of the artificial chamber is not suitable for the optimized operation of the compressed air energy storage power station, which will affect the operating efficiency of the compressed air energy storage power station. Therefore, the initial volume needs to be corrected, that is, let V=V+ΔV, and input the corrected volume V+ΔV into the pre-built energy storage capacity model to obtain the first power generation of the expander in the compressed air energy storage power station corresponding to the corrected volume. The absolute value of the difference between the first power generation and the preset power generation is compared with the preset threshold again. If the absolute value of the difference between the first power generation and the preset power generation is less than the preset threshold, the corrected initial volume is taken as the target volume of the artificial chamber. Otherwise, the initial volume is corrected again, and the corrected initial volume is re-inputted into the pre-built energy storage capacity model until the new absolute value is less than the preset threshold. Thus, the target volume of the artificial chamber is determined to improve the operating efficiency of the compressed air energy storage power station.

[0105] In summary, to enable those skilled in the art to more clearly understand the method for estimating the volume of an underground artificial chamber in a compressed air energy storage power station according to embodiments of the present invention, specific examples will be described below, such as... Figure 2 As shown,

[0106] Step S201: Obtain operating parameters based on energy storage requirements and supporting core equipment parameters, and set an error threshold ∈;

[0107] Step S202: Set the initial volume of the artificial chamber V = V0;

[0108] Step S203: Input the initial volume V of the artificial chamber into the energy storage capacity model to obtain the first power generation S;

[0109] Step S204: If the first power generation S is equal to the preset power generation, i.e., the rated power generation capacity S R The absolute value of the difference is greater than or equal to the preset threshold ∈, i.e., |S R When -S|≥∈, proceed to step S205; if the rated power generation capacity S R The absolute value of the difference is less than the preset threshold ∈, i.e., |S R If -S|<∈, then the initial volume of the artificial chamber is taken as the target volume, and step S206 is executed;

[0110] Step S205: Correct the initial volume and input it into the energy storage capacity model, that is, let V = V + ΔV, and execute step S203.

[0111] Step S206, the volume estimation process ends.

[0112] Therefore, based on the heat loss caused by heat exchange between air and surrounding rock during the operation of the compressed air energy storage power station, this embodiment of the invention establishes an accurate and intuitive model of the energy storage capacity of the artificial chamber. The energy storage capacity of the chamber is accurately evaluated by the discharge quantity. This can optimize the early planning and design of the underground artificial chamber of the compressed air energy storage power station, thereby improving the operating efficiency of the compressed air energy storage power station.

[0113] According to an embodiment of the present invention, a method for estimating the volume of an underground artificial chamber in a compressed air energy storage power station involves inputting the determined initial volume of the artificial chamber into a pre-built energy storage capacity model to obtain the first power generation of the expander within the compressed air energy storage power station. If the absolute value of the difference between the first power generation and a preset power generation is less than a preset threshold, the initial volume is taken as the target volume of the artificial chamber. Otherwise, the initial volume is corrected and re-inputted into the energy storage capacity model until a new absolute value is less than the preset threshold. This solves the problem of unsuitable artificial chamber volume affecting the operating efficiency of the compressed air energy storage power station. By determining the target volume of the artificial chamber using the energy storage capacity model of the compressed air energy storage power station and a pre-set rated power generation capacity, the accuracy of the artificial chamber volume is improved, thereby ensuring the operating efficiency of the compressed air energy storage power station.

[0114] Next, referring to the accompanying drawings, a volume estimation device for an underground artificial chamber of a compressed air energy storage power station according to an embodiment of the present invention is described.

[0115] Figure 3 This is a block diagram of a compressed air energy storage power station underground artificial chamber volume estimation device according to an embodiment of the present invention.

[0116] like Figure 3 As shown, the compressed air energy storage power station underground artificial chamber volume estimation device 10 includes: a determination module 100, a judgment module 200, and a correction module 300.

[0117] Among them, the determining module 100 is used to determine the initial volume of the artificial chamber;

[0118] The judgment module 200 is used to input the initial volume into the pre-built energy storage capacity model to obtain the first power generation of the expander in the compressed air energy storage power station, and to determine whether the absolute value of the difference between the first power generation and the preset power generation is less than the preset threshold. The pre-built energy storage capacity model is constructed based on the operating parameters of the compressed air energy storage power station.

[0119] The correction module 300 is used to take the initial volume as the target volume of the artificial chamber if the absolute value of the difference between the first power generation and the preset power generation is less than the preset threshold; otherwise, the initial volume is corrected and the corrected initial volume is re-inputted into the pre-built energy storage capacity model until the new absolute value is less than the preset threshold.

[0120] According to one embodiment of the present invention, before inputting the initial volume into a pre-built energy storage capacity model, the determination module 200 further includes:

[0121] The acquisition unit is used to acquire the operating parameters of the compressed air energy storage power station;

[0122] The calculation unit is used to calculate the temperature-pressure change curve of the air inside the artificial chamber using operating parameters and the thermodynamic model of the artificial chamber. Based on the temperature-pressure change curve, the target power generation time of the expander and the power generation of the expander within the target power generation time are obtained. The power generation of the expander is integrated to obtain the energy storage capacity model of the artificial chamber.

[0123] According to one embodiment of the present invention, the power generation model formula of the expander is:

[0124]

[0125] The formula for the temperature-pressure change curve is:

[0126]

[0127] The formula for the energy storage capacity model of an artificial chamber is:

[0128]

[0129] Where P is the power output of the expander at time t, and g is the expander's... η is the mass flow rate of air passing through the expander. G Here, G represents the expansion mechanical losses and generator efficiency correction factors, i represents the number of expansion stages, N represents the total number of expansion stages, and T represents the total number of expansion stages. in,i Let T be the inlet temperature of the i-th stage expander at time t. out,iLet c be the exhaust temperature of the i-th stage expander at time t. p Let ρ be the specific heat capacity of air at constant pressure, p be the air pressure, ε be the efficiency of the heat exchanger on the generator side, and T be the specific heat capacity of air at constant pressure. air η represents the temperature of the air in the artificial chamber during the venting phase. i Let β be the isentropic efficiency of the i-th stage turbine. i For the expansion ratio, T HES HES represents the temperature of the high-temperature thermal storage tank, k represents the air insulation coefficient, and t represents the temperature of the high-temperature thermal storage tank. g For the power generation duration of the expander, P g This is a generator expansion model.

[0130] According to one embodiment of the present invention, before calculating the temperature-pressure change curve of the air inside the artificial chamber using operating parameters and a thermodynamic model of the artificial chamber, the calculation unit further includes:

[0131] The first acquisition subunit is used to acquire the difference in air mass flow rate entering and leaving the artificial chamber, the change in air enthalpy and heat flux entering and leaving the artificial chamber;

[0132] The second acquisition subunit is used to obtain the rate of change of the air storage in the artificial chamber based on the air mass flow rate difference, and to obtain the change of the internal energy of the air in the artificial chamber based on the change of air enthalpy and heat flux.

[0133] The third acquisition subunit is used to obtain the thermodynamic model of the artificial chamber based on the rate of change of air storage and the change of air internal energy.

[0134] According to one embodiment of the present invention, a computing unit includes:

[0135] Micro-molecular units are used to differentiate the gas state equation of the artificial chamber based on the thermodynamic model of the artificial chamber, and obtain the air temperature-pressure differential equation of the artificial chamber.

[0136] The fourth acquisition subunit is used to obtain the temperature-pressure change curve of the air in the artificial cave based on the operating parameters and the air temperature-pressure differential equation.

[0137] According to one embodiment of the present invention, a computing unit includes:

[0138] The fifth acquisition subunit is used to acquire target temperature and target pressure data of the air in the artificial chamber within the target power generation time based on the temperature-pressure change curve.

[0139] The calculation subunit is used to calculate the power output of the expander within the target power generation time using the expander's power generation model, target temperature data, and target pressure data.

[0140] According to an embodiment of the present invention, an underground artificial chamber volume estimation device for a compressed air energy storage power station inputs the determined initial volume of the artificial chamber into a pre-constructed energy storage capacity model to obtain the first power generation of the expander in the compressed air energy storage power station. If the absolute value of the difference between the first power generation and the preset power generation is less than a preset threshold, the initial volume is taken as the target volume of the artificial chamber; otherwise, the initial volume is corrected and re-inputted into the energy storage capacity model until the new absolute value is less than the preset threshold. This solves the problem of unsuitable artificial chamber volume affecting the operating efficiency of the compressed air energy storage power station. By determining the target volume of the artificial chamber through the energy storage capacity model of the compressed air energy storage power station and the preset rated power generation capacity, the accuracy of the artificial chamber volume is improved, thereby ensuring the operating efficiency of the compressed air energy storage power station.

[0141] Figure 4 This is a schematic diagram of an electronic device provided in an embodiment of the present invention. The electronic device may include:

[0142] The memory 401, the processor 402, and the computer program stored on the memory 401 and capable of running on the processor 402.

[0143] When the processor 402 executes the program, it implements a method for estimating the volume of an underground artificial chamber in a compressed air energy storage power station, as provided in the above embodiments.

[0144] Furthermore, electronic devices also include:

[0145] Communication interface 403 is used for communication between memory 401 and processor 402.

[0146] The memory 401 is used to store computer programs that can run on the processor 402.

[0147] The memory 401 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0148] If the memory 401, processor 402, and communication interface 403 are implemented independently, then the communication interface 403, memory 401, and processor 402 can be interconnected via a bus to complete communication between them. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized into address buses, data buses, control buses, etc. For ease of representation, Figure 4 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0149] Optionally, in a specific implementation, if the memory 401, processor 402, and communication interface 403 are integrated on a single chip, then the memory 401, processor 402, and communication interface 403 can communicate with each other through an internal interface.

[0150] Processor 402 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention.

[0151] This embodiment also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for estimating the volume of an underground artificial chamber in a compressed air energy storage power station.

[0152] This invention also provides a computer program product, including a computer program / instructions that, when executed by a processor, implement the steps of the method as described in the above embodiments.

[0153] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0154] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0155] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more N executable instructions for implementing custom logic functions or processes, and the scope of preferred embodiments of the invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of the invention pertain.

[0156] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Furthermore, computer-readable media can even be paper or other suitable media on which programs can be printed, because programs can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpreting, or otherwise processing as necessary, and then stored in computer memory.

[0157] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0158] Those skilled in the art will understand that all or part of the steps of the methods described in the above embodiments can be implemented by a program instructing related hardware, and the program can be stored in a computer-readable storage medium. When executed, the program includes one or a combination of the steps of the method embodiments.

[0159] Furthermore, the functional units in the various embodiments of the present invention can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0160] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for estimating the volume of an underground artificial chamber in a compressed air energy storage power station, characterized in that, Includes the following steps: Determine the initial volume of the artificial chamber; The initial volume is input into a pre-built energy storage capacity model to obtain the first power generation of the expander in the compressed air energy storage power station, and it is determined whether the absolute value of the difference between the first power generation and the preset power generation is less than a preset threshold. The pre-built energy storage capacity model is constructed based on the operating parameters of the compressed air energy storage power station. If the absolute value of the difference between the first power generation and the preset power generation is less than the preset threshold, then the initial volume is taken as the target volume of the artificial chamber; otherwise, the initial volume is corrected and the corrected initial volume is re-inputted into the pre-built energy storage capacity model until the new absolute value is less than the preset threshold. Before inputting the initial volume into the pre-constructed energy storage capacity model, the method further includes: obtaining the operating parameters of the compressed air energy storage power station; using the operating parameters and the thermodynamic model of the artificial chamber to calculate the temperature-pressure change curve of the air inside the artificial chamber; obtaining the target power generation time of the expander and the power generation of the expander within the target power generation time based on the temperature-pressure change curve; and integrating the power generation of the expander to obtain the energy storage capacity model of the artificial chamber.

2. The method for estimating the volume of an underground artificial chamber in a compressed air energy storage power station according to claim 1, characterized in that, The power generation model formula for the expander is: ； The formula for the temperature-pressure change curve is: ； ； The energy storage capacity model formula for the artificial chamber is as follows: ； in, Let be the power output of the expander at time t. For expander, The mass flow rate of air passing through the expander. Here, represents the correction factors for expander mechanical losses and generator efficiency; G represents the expander power generation process; and i represents the number of expander stages. This represents the total number of stages in the expander. Let be the inlet temperature of the i-th stage expander at time t. Let be the exhaust temperature of the i-th stage expander at time t. The specific heat capacity of air at constant pressure. p For air pressure, For the efficiency of the heat exchanger on the power generation side, This refers to the temperature of the air in the artificial chamber during the venting phase. Let be the isentropic efficiency of the i-th stage turbine. The expansion ratio, This refers to the temperature of the high-temperature thermal storage tank. This is a high-temperature thermal storage tank, where k is the air insulation coefficient. For the duration of power generation by the expander, This is a generator model for an expander.

3. The method for estimating the volume of an underground artificial chamber in a compressed air energy storage power station according to claim 1, characterized in that, Before calculating the temperature-pressure change curve of the air inside the artificial chamber using the operating parameters and the thermodynamic model of the artificial chamber, the following steps are also included: The difference in air mass flow rate entering and exiting the artificial chamber, the change in air enthalpy, and the heat flux entering and exiting the artificial chamber are obtained. The rate of change of the air storage volume in the artificial cavern is obtained based on the air mass flow rate difference, and the change of the internal energy of the air in the artificial cavern is obtained based on the change of air enthalpy and the heat flux. The thermodynamic model of the artificial chamber is obtained based on the rate of change of the air storage volume and the change of the internal energy of the air.

4. The method for estimating the volume of an underground artificial chamber in a compressed air energy storage power station according to claim 3, characterized in that, The calculation of the temperature-pressure change curve of the air inside the artificial chamber using the operating parameters and the thermodynamic model of the artificial chamber includes: Based on the thermodynamic model of the artificial chamber, the gas state equation of the artificial chamber is differentiated to obtain the air temperature-pressure differential equation of the artificial chamber. The temperature-pressure variation curve of the air inside the artificial cavern is obtained based on the operating parameters and the air temperature-pressure differential equation.

5. The method for estimating the volume of an underground artificial chamber in a compressed air energy storage power station according to claim 1, characterized in that, The step of obtaining the target power generation duration of the expander and the power generation capacity of the expander within the target power generation duration based on the temperature-pressure change curve includes: The target temperature and target pressure data of the air in the artificial chamber within the target power generation duration are obtained based on the temperature-pressure change curve. The power generation capacity of the expander within the target power generation time is calculated using the power generation model of the expander, the target temperature data, and the target pressure data.

6. A device for estimating the volume of an underground artificial chamber in a compressed air energy storage power station, characterized in that, include: A determining module is used to determine the initial volume of the artificial chamber; The judgment module is used to input the initial volume into the pre-built energy storage capacity model to obtain the first power generation of the expander in the compressed air energy storage power station, and to determine whether the absolute value of the difference between the first power generation and the preset power generation is less than a preset threshold. The pre-built energy storage capacity model is constructed based on the operating parameters of the compressed air energy storage power station. The correction module is used to take the initial volume as the target volume of the artificial chamber if the absolute value of the difference between the first power generation and the preset power generation is less than the preset threshold; otherwise, the initial volume is corrected and the corrected initial volume is re-inputted into the pre-built energy storage capacity model until the new absolute value is less than the preset threshold. Before inputting the initial volume into the pre-constructed energy storage capacity model, the judgment module further includes: an acquisition unit for acquiring the operating parameters of the compressed air energy storage power station; and a calculation unit for calculating the temperature-pressure change curve of the air inside the artificial chamber using the operating parameters and the thermodynamic model of the artificial chamber, obtaining the target power generation time of the expander and the power generation of the expander within the target power generation time based on the temperature-pressure change curve, and integrating the power generation of the expander to obtain the energy storage capacity model of the artificial chamber.

7. The device for estimating the volume of an underground artificial chamber in a compressed air energy storage power station according to claim 6, characterized in that, The power generation model formula for the expander is: ； The formula for the temperature-pressure change curve is: ； ； The energy storage capacity model formula for the artificial chamber is as follows: ； in, Let be the power output of the expander at time t. For expander, The mass flow rate of air passing through the expander. Here, represents the correction factors for expander mechanical losses and generator efficiency; G represents the expander power generation process; and i represents the number of expander stages. This represents the total number of stages in the expander. Let be the inlet temperature of the i-th stage expander at time t. Let be the exhaust temperature of the i-th stage expander at time t. The specific heat capacity of air at constant pressure. p For air pressure, For the efficiency of the heat exchanger on the power generation side, This refers to the temperature of the air in the artificial chamber during the venting phase. Let be the isentropic efficiency of the i-th stage turbine. The expansion ratio, This refers to the temperature of the high-temperature thermal storage tank. It is a high-temperature thermal storage tank. k The air insulation coefficient, For the duration of power generation by the expander, This is a generator model for an expander.

8. The device for estimating the volume of an underground artificial chamber in a compressed air energy storage power station according to claim 6, characterized in that, Before calculating the temperature-pressure change curve of the air inside the artificial chamber using the operating parameters and the thermodynamic model of the artificial chamber, the calculation unit further includes: The first acquisition subunit is used to acquire the difference in air mass flow rate entering and exiting the artificial chamber, the change in air enthalpy and heat flux entering and exiting the artificial chamber; The second acquisition subunit is used to obtain the rate of change of the air storage in the artificial cavern based on the air mass flow rate difference, and to obtain the change of the internal energy of the air in the artificial cavern based on the change of air enthalpy and the heat flux. The third acquisition subunit is used to obtain the thermodynamic model of the artificial chamber based on the rate of change of the air storage volume and the change of the internal energy of the air.

9. The device for estimating the volume of an underground artificial chamber in a compressed air energy storage power station according to claim 8, characterized in that, The computing unit includes: Micro-molecular units are used to differentiate the gas state equation of the artificial chamber based on the thermodynamic model of the artificial chamber, so as to obtain the air temperature-pressure differential equation of the artificial chamber. The fourth acquisition subunit is used to obtain the temperature-pressure change curve of the air in the artificial cave based on the operating parameters and the air temperature-pressure differential equation.

10. The device for estimating the volume of an underground artificial chamber in a compressed air energy storage power station according to claim 6, characterized in that, The computing unit includes: The fifth acquisition subunit is used to acquire the target temperature data and target pressure data of the air in the artificial chamber within the target power generation duration based on the temperature-pressure change curve. The calculation subunit is used to calculate the power generation of the expander within the target power generation time using the power generation model of the expander, the target temperature data, and the target pressure data.

11. An electronic device, characterized in that, include: The system includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement a method for estimating the volume of an underground artificial chamber in a compressed air energy storage power station as described in any one of claims 1-5.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement a method for estimating the volume of an underground artificial chamber in a compressed air energy storage power station as described in any one of claims 1-5.

13. A computer program product, comprising a computer program, characterized in that, The computer program is executed to implement a method for estimating the volume of an underground artificial chamber in a compressed air energy storage power station as described in any one of claims 1-5.

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