Leakage rate calculation method, device, medium and equipment for underground lined caverns of compressed air energy storage power stations

Abstract

The present invention discloses a method, device, medium, and equipment for calculating the leakage rate of an underground lined chamber in a compressed air energy storage power station, belonging to the technical field of compressed air energy storage power stations. The method comprises the following steps: obtaining the air mass m0 (kg) within the chamber at the beginning of a set time period Δt, the theoretical air mass m1 (kg) within the chamber at the end of the set time period Δt, and the actual air mass m2 (kg) within the chamber at the end of the set time period Δt; and calculating the leakage rate of the underground lined chamber in the compressed air energy storage power station within the set time period Δt based on the air mass m0 (kg) within the chamber at the beginning of the set time period Δt, the air mass m1 (kg) within the chamber at the end of the set time period Δt, and the air mass m2 (kg) within the chamber at the end of the set time period Δt. The device, medium, and equipment can be used to implement this method. They can monitor the leakage rate of the underground lined chamber in the compressed air energy storage power station in real time, ensuring the operational safety of the underground lined chamber in the compressed air energy storage power station.

Description

Technical Field

[0001] The present invention relates to the technical field of compressed air energy storage power stations, and in particular to a method, device, medium and equipment for calculating the leakage rate of an underground lined cavern of a compressed air energy storage power station. Background Art

[0002] Airtightness is one of the most critical performance characteristics of underground lined chambers for compressed air energy storage, and it directly affects the safety and efficiency of the energy storage system. Currently, the sealing layer materials widely used in underground lined chambers are mainly divided into two categories: steel lining and polymer materials. Although polymer materials have good flexibility and corrosion resistance, they are permeable materials. Therefore, during the long-term operation of the chamber, slow leakage of gas will occur, with a certain leakage rate. In contrast, steel lining is an impermeable material that has a good sealing effect on gas. However, during operation, due to the high pressure in the gas storage reservoir, tiny tears or stress concentration areas may appear at the welds of the steel lining, resulting in gas leakage. Although the probability of this type of leakage is low, once it occurs, it will have a greater impact on the operation of the system.

[0003] Whether it's slow seepage from polymer materials or localized leaks caused by weld defects in steel linings, these issues are directly related to the safety and long-term operational stability of the storage facility. If leakage issues are not promptly and effectively controlled, they can lead to energy loss, reduced operational efficiency, and even safety hazards. Therefore, establishing scientific and reasonable criteria for determining sealant leakage can help identify and prevent potential leaks early, providing technical support and assurance for the long-term stable operation of the storage facility. Summary of the Invention

[0004] In view of this, the present invention provides a method, device, medium and equipment for calculating the leakage rate of an underground lined cavern in a compressed air energy storage power station. By monitoring the process of air injection and discharge into the cavern, the ideal total gas storage volume in the cavern can be obtained. The actual stored gas volume obtained by monitoring is then compared with the ideal value to determine whether a leak occurs in the cavern, making it more suitable for practical use.

[0005] In order to achieve the first objective above, the present invention provides a method for calculating the leakage rate of an underground lined cavern of a compressed air energy storage power station as follows:

[0006] The present invention provides a method for calculating the leakage rate of an underground lined cavern of a compressed air energy storage power station, comprising the following steps:

[0007] Obtaining the air mass m0 (kg) in the storage at the initial moment within the set time period Δt, wherein the air mass m0 (kg) in the storage at the initial moment within the set time period Δt is the theoretical total air mass in the underground lined cavern of the compressed air energy storage power station;

[0008] Obtaining the theoretical air mass m1 (kg) in the storage at the end of the set time period Δt, wherein the theoretical air mass m1 (kg) in the storage at the end of the set time period Δt is the difference between the inflated air mass and the deflated air mass in the storage during the set time period Δt;

[0009] Obtain the air quality monitoring value m2 (kg) in the warehouse at the end of the set time period Δt, wherein the air quality monitoring value m2 (kg) in the warehouse at the end of the set time period Δt is the actual monitored air quality in the warehouse;

[0010] According to the air mass m0 (kg) in the reservoir at the initial moment within the set time period Δt, the theoretical air mass m1 (kg) in the reservoir at the end moment within the set time period Δt, and the air quality monitoring value m2 (kg) in the reservoir at the end moment within the set time period Δt, the leakage rate of the underground lined chamber of the compressed air energy storage power station within the set time period Δt is calculated.

[0011] The method for calculating the leakage rate of an underground lined cavern of a compressed air energy storage power station provided by the present invention can also be further implemented by adopting the following technical measures.

[0012] Preferably, in the step of obtaining the theoretical air mass m1 (kg) in the storage at the end of the set time period Δt, the calculation formula for the theoretical air mass m1 (kg) in the storage at the end of the set time period Δt is:

[0013]

[0014] Among them, m0 (kg) is the initial gas volume, which can be calculated through the temperature and pressure monitoring values ​​in the warehouse. is a certain inflation time period within the Δt time period, is a deflation time period within the Δt time period, yes The inflation flow rate within a certain time period, yes The deflation flow rate during time, i represents the index of different time periods, j represents that there are j inflation time periods in the Δt time period, and k represents that there are k deflation time periods in the Δt time period.

[0015] Preferably, in the step of obtaining the air quality monitoring value m2 (kg) in the warehouse at the end time of the set time period Δt, the calculation formula of the air quality monitoring value m2 (kg) in the warehouse at the end time of the set time period Δt is:

[0016] m2=ρ×V0 (2)

[0017] in,

[0018]

[0019] in,

[0020] V0 is the volume of the underground lined cavern, in m 3

[0021] M = 0.02897 g / mol is the molar mass of air,

[0022] V m is the molar volume of the gas, obtained by solving the following equation:

[0023]

[0024] Where, P t (Pa) is the gas pressure, R (8.314 J / (mol·K)) is the ideal gas constant, T t (K) is the temperature of the gas, V m (m 3 / mol) is the molar volume of the gas, a and b are the Redlick-Kuang equation constants, which depend on the critical temperature and critical pressure of the gas.

[0025]

[0026] The critical temperature of air is Tc≈132.5K, and the critical pressure is Pc≈3.77×10 6 Pa.

[0027] Preferably, in the step of calculating the leakage rate of the underground lined cavern of the compressed air energy storage power station within the set time period Δt according to the theoretical air mass m1 (kg) in the cavern at the end time of the set time period Δt and the monitored air quality value m2 (kg) in the cavern at the end time of the set time period Δt, the calculation formula of the leakage rate δ of the underground lined cavern of the compressed air energy storage power station within the set time period Δt is:

[0028]

[0029] Preferably, the set time period Δt is once per hour.

[0030] In order to achieve the second objective above, the present invention provides a device for calculating the leakage rate of an underground lined cavern of a compressed air energy storage power station. The device is as follows:

[0031] The present invention provides a device for calculating the leakage rate of an underground lined cavern of a compressed air energy storage power station, comprising:

[0032] The module for obtaining the air quality in the storage at the initial moment is used to obtain the air quality m0 (kg) in the storage at the initial moment within the set time period Δt, wherein the air quality m0 (kg) in the storage at the initial moment within the set time period Δt is the theoretical total air quality in the underground lined storage of the compressed air energy storage power station;

[0033] The module for obtaining the theoretical air quality in the storage at the end time is used to obtain the theoretical air quality m1 (kg) in the storage at the end time of the set time period Δt, wherein the theoretical air quality m1 (kg) in the storage at the end time of the set time period Δt is the difference between the air quality of the inflated air and the air quality of the deflated air in the storage during the set time period Δt;

[0034] The module for obtaining the air quality in the warehouse at the end time is used to obtain the air quality monitoring value m2 (kg) in the warehouse at the end time of the set time period Δt, wherein the air quality monitoring value m2 (kg) in the warehouse at the end time of the set time period Δt is the actual monitored air quality in the warehouse;

[0035] The leakage rate calculation module is used to calculate the leakage rate of the underground lined cavern of the compressed air energy storage power station within the set time period Δt based on the air mass m0 (kg) in the reservoir at the initial moment within the set time period Δt, the theoretical air mass m1 (kg) in the reservoir at the end moment within the set time period Δt, and the air quality monitoring value m2 (kg) in the reservoir at the end moment within the set time period Δt.

[0036] The device for calculating the leakage rate of an underground lined cavern of a compressed air energy storage power station provided by the present invention can also be further implemented by adopting the following technical measures.

[0037] Preferably, the compressed air energy storage power station underground lined cavern leakage rate calculation device further includes:

[0038] A display device is used to display basic information of the underground lined cavern of the compressed air energy storage power station, including time-history curves of air inlet and outlet rates, time-history curves of internal pressure, time-history curves of internal temperature, time-history curves of leakage rate, and real-time values ​​corresponding to each curve;

[0039] Among them, the basic information of the underground lined cavern of the compressed air energy storage power station includes burial depth, cavern diameter, volume, and pipeline diameter.

[0040] In order to achieve the third objective above, the technical solution of the computer-readable storage medium provided by the present invention is as follows:

[0041] The computer-readable storage medium provided by the present invention stores a leakage rate calculation program for the underground lined cavern of a compressed air energy storage power station. When the leakage rate calculation program for the underground lined cavern of a compressed air energy storage power station is executed by a processor, the steps of the leakage rate calculation method for the underground lined cavern of a compressed air energy storage power station provided by the present invention are implemented.

[0042] In order to achieve the fourth purpose above, the technical solution of the device provided by the present invention is as follows:

[0043] The device provided by the present invention includes a pipeline monitoring system, a storage monitoring system, a data interpretation module, a data display system, a memory and a processor.

[0044] The pipeline monitoring system is used to monitor the inlet flow rate and outlet flow rate of the gas pipeline;

[0045] The in-store monitoring system is used to monitor the in-store temperature, in-store pressure, and radial expansion;

[0046] The data interpretation module is used to convert the analog signals obtained by the pipeline monitoring system and the in-store monitoring system into digital signals;

[0047] The memory stores the leakage rate calculation program for the underground lined cavern of the compressed air energy storage power station. When the leakage rate calculation program for the underground lined cavern of the compressed air energy storage power station is executed by the processor, the steps of the leakage rate calculation method for the underground lined cavern of the compressed air energy storage power station are implemented.

[0048] The device provided by the present invention can also be further implemented by adopting the following technical measures.

[0049] As a preference,

[0050] The intake air flow rate and exhaust air flow rate of the pipeline monitoring system are air flow rate sensors;

[0051] The in-store monitoring system uses grating pressure sensors, grating temperature sensors, and grating displacement sensors, which are arranged in the storehouse and pulled out by pipelines;

[0052] The average temperature in the underground lined cave of the compressed air energy storage power station is calculated by using temperature grating sensors arranged in the cave, and the length or volume of each area is weighted averaged.

[0053] The expansion rate of the underground lined cavern of the compressed air energy storage power station is calculated by using the radial quantity inside the cavern to calculate the expansion size of the cavern volume.

[0054] Preferably, the equipment further comprises an alarm device, which is activated to sound an alarm when the leakage rate of the underground lined cavern of the compressed air energy storage power station exceeds a safety threshold.

[0055] The present invention provides a method, device, medium and equipment for calculating the leakage rate of an underground lined cavern in a compressed air energy storage power station. The mass of the gas filled in the cavern can be used as a key indicator to judge whether the sealing layer has leaked. Its value not only represents the total amount of gas stored in the cavern, but also reflects the energy stored in the cavern. During the operation of the cavern, when energy needs to be released for power generation, the more mass of stored gas, the more energy that can be converted. By monitoring the process of air injection and discharge into and out of the cavern, the ideal total gas storage volume in the cavern can be obtained. By comparing the actual stored gas volume obtained by monitoring with the ideal value, it can be determined whether the cavern has leaked. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0057] Figure 1 A flowchart of the steps of a method for calculating the leakage rate of an underground lined cavern of a compressed air energy storage power station provided by an embodiment of the present invention;

[0058] Figure 2 A schematic diagram of the signal flow relationship between the functional modules in the device for calculating the leakage rate of an underground lined cavern of a compressed air energy storage power station provided by an embodiment of the present invention;

[0059] Figure 3 A schematic diagram of the structure of a device for calculating the leakage rate of an underground lined cavern of a compressed air energy storage power station in the hardware operating environment provided by an embodiment of the present invention;

[0060] Figure 4 A schematic diagram of the functions and layout of an electronic device provided by an embodiment of the present invention;

[0061] Description of reference numerals:

[0062] 1- Real-time numerical display of air inlet or outlet rate, 2- Real-time numerical display of internal pressure, 3- Real-time numerical display of internal temperature, 4- Real-time numerical display of leakage rate. DETAILED DESCRIPTION

[0063] In order to solve the problems existing in the prior art, the present invention provides a method, device, medium and equipment for calculating the leakage rate of an underground lined cavern in a compressed air energy storage power station. By monitoring the process of air injection and discharge into the cavern, the ideal total gas storage volume in the cavern can be obtained. The actual stored gas volume obtained by monitoring is then compared with the ideal value to determine whether a leak occurs in the cavern, making it more suitable for practical use.

[0064] To further illustrate the technical means and effectiveness of the present invention in achieving its intended purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, describes in detail the method, device, medium, and equipment for calculating the leakage rate of an underground lined chamber in a compressed air energy storage power station, including its specific implementation, structure, features, and effectiveness. In the following description, different references to "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. Furthermore, the features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

[0065] The term "and / or" in this article is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B, specifically understood as: A and B may be included at the same time, A may exist alone, or B may exist alone, and any of the above three situations may exist.

[0066] Calculation method for leakage rate of underground lined chambers in compressed air energy storage power stations

[0067] See attached Figure 1 The method for calculating the leakage rate of an underground lined cavern of a compressed air energy storage power station provided by an embodiment of the present invention includes the following steps:

[0068] Step S1: Obtain the air mass m0 (kg) in the storage at the initial moment within the set time period Δt, wherein the air mass m0 (kg) in the storage at the initial moment within the set time period Δt is the theoretical total air mass in the underground lined storage of the compressed air energy storage power station;

[0069] Step S2: Obtain the theoretical air mass m1 (kg) in the storage at the end of the set time period Δt, wherein the theoretical air mass m1 (kg) in the storage at the end of the set time period Δt is the difference between the air mass of the filling air in the storage and the air mass of the deflation air in the set time period Δt;

[0070] Step S3: Obtain the air quality monitoring value m2 (kg) in the warehouse at the end of the set time period Δt, wherein the air quality monitoring value m2 (kg) in the warehouse at the end of the set time period Δt is the actual monitored air quality in the warehouse;

[0071] Step S4: Based on the air mass m0 (kg) in the reservoir at the initial moment within the set time period Δt, the theoretical air mass m1 (kg) in the reservoir at the end moment within the set time period Δt, and the air quality monitoring value m2 (kg) in the reservoir at the end moment within the set time period Δt, the leakage rate of the underground lined cavern of the compressed air energy storage power station within the set time period Δt is calculated.

[0072] An embodiment of the present invention provides a method for calculating the leakage rate of an underground lined cavern in a compressed air energy storage power station. The mass of the gas filled in the cavern can be used as a key indicator to judge whether the sealing layer has leaked. Its value not only represents the total amount of gas stored in the cavern, but also reflects the energy stored in the cavern. During the operation of the cavern, when energy needs to be released for power generation, the more mass of stored gas, the more energy that can be converted. By monitoring the process of air injection and discharge into the cavern, the ideal total gas storage volume in the cavern can be obtained. By comparing the actual stored gas volume obtained by monitoring with the ideal value, it can be determined whether the cavern has leaked.

[0073] In the step of obtaining the theoretical air mass m1 (kg) in the storage at the end of the set time period Δt, the calculation formula for the theoretical air mass m1 (kg) in the storage at the end of the set time period Δt is:

[0074]

[0075] Among them, m0 (kg) is the initial gas volume, which can be calculated through the temperature and pressure monitoring values ​​in the warehouse. is a certain inflation time period within the Δt time period, is a deflation time period within the Δt time period, yes The inflation flow rate within a certain time period, yes The deflation flow rate during time, i represents the index of different time periods, j represents that there are j inflation time periods in the Δt time period, and k represents that there are k deflation time periods in the Δt time period.

[0076] In the step of obtaining the air quality monitoring value m2 (kg) in the warehouse at the end of the set time period Δt, the calculation formula of the air quality monitoring value m2 (kg) in the warehouse at the end of the set time period Δt is:

[0077] m2=ρ×V0 (2)

[0078] in,

[0079] V0 is the volume of the underground lined cavern, in m 3

[0080]

[0081] in,

[0082] M = 0.02897 g / mol is the molar mass of air,

[0083] V m is the molar volume of the gas, obtained by solving the following equation:

[0084]

[0085] Where, P t (Pa) is the gas pressure, R (8.314 J / (mol·K) is the ideal gas constant, T t (K) is the temperature of the gas, V m (m 3 / mol) is the molar volume of the gas, a and b are the Redlick-Kuang equation constants, which depend on the critical temperature and critical pressure of the gas.

[0086]

[0087] The critical temperature of air is Tc≈132.5K, and the critical pressure is Pc≈3.77×10 6 Pa.

[0088] Among them, in the step of calculating the leakage rate of the underground lined chamber of the compressed air energy storage power station within the set time period Δt according to the theoretical air mass m1 (kg) in the chamber at the end of the set time period Δt and the monitored air quality value m2 (kg) in the chamber at the end of the set time period Δt, the calculation formula of the leakage rate δ of the underground lined chamber of the compressed air energy storage power station within the set time period Δt is:

[0089]

[0090] The time period Δt is set to once per hour or once per day.

[0091] Compressed air energy storage power station underground lined cavern leakage rate calculation device

[0092] See attached Figure 2 The leakage rate calculation device for an underground lined cavern of a compressed air energy storage power station provided by an embodiment of the present invention includes:

[0093] The module for obtaining the air quality in the storage at the initial moment is used to obtain the air quality m0 (kg) in the storage at the initial moment within the set time period Δt, wherein the air quality m0 (kg) in the storage at the initial moment within the set time period Δt is the theoretical total air quality in the underground lined storage of the compressed air energy storage power station;

[0094] The module for obtaining the theoretical air quality in the storage at the end time is used to obtain the theoretical air quality m1 (kg) in the storage at the end time of the set time period Δt, wherein the theoretical air quality m1 (kg) in the storage at the end time of the set time period Δt is the difference between the air quality of the filling air in the storage and the air quality of the deflation air in the set time period Δt;

[0095] The module for obtaining the air quality monitoring value in the warehouse at the end time is used to obtain the air quality monitoring value m2 (kg) in the warehouse at the end time of the set time period Δt, wherein the air quality monitoring value m2 (kg) in the warehouse at the end time of the set time period Δt is the actual monitored air quality in the warehouse;

[0096] The leakage rate calculation module is used to calculate the leakage rate of the underground lined cavern of the compressed air energy storage power station within the set time period Δt based on the air mass m0 (kg) in the reservoir at the initial moment within the set time period Δt, the theoretical air mass m1 (kg) in the reservoir at the end moment within the set time period Δt, and the air quality monitoring value m2 (kg) in the reservoir at the end moment within the set time period Δt.

[0097] An embodiment of the present invention provides a device for calculating the leakage rate of an underground lined cavern in a compressed air energy storage power station. The mass of the gas filled in the cavern can be used as a key indicator to judge whether the sealing layer has leaked. Its value not only represents the total amount of gas stored in the cavern, but also reflects the energy stored in the cavern. During the operation of the cavern, when energy needs to be released for power generation, the more mass of stored gas, the more energy that can be converted. By monitoring the process of air injection and discharge into the cavern, the ideal total gas storage volume in the cavern can be obtained. By comparing the actual stored gas volume obtained by monitoring with the ideal value, it can be determined whether the cavern has leaked.

[0098] The device for calculating the leakage rate of an underground lined chamber in a compressed air energy storage power station also includes a display device for displaying basic information about the underground lined chamber in the compressed air energy storage power station, including time-history curves of the air inlet and outlet rates, a time-history curve of the internal pressure, a time-history curve of the internal temperature, a time-history curve of the leakage rate, and the corresponding real-time values ​​of each curve. The basic information about the underground lined chamber in the compressed air energy storage power station includes burial depth, chamber diameter, volume, and pipe diameter. This allows relevant personnel to intuitively understand relevant information, data, and data trends through the display device, ensuring the safe operation of the underground lined chamber in the compressed air energy storage power station and improving work efficiency.

[0099] Computer-readable storage medium

[0100] The computer-readable storage medium provided by the present invention stores a leakage rate calculation program for the underground lined cavern of a compressed air energy storage power station. When the leakage rate calculation program for the underground lined cavern of a compressed air energy storage power station is executed by a processor, the steps of the leakage rate calculation method for the underground lined cavern of a compressed air energy storage power station provided by the present invention are implemented.

[0101] An embodiment of the present invention provides a computer-readable storage medium. The mass of the gas filled in the cavern can be used as a key indicator to judge whether the sealing layer has leaked. Its value not only represents the total amount of gas stored in the cavern, but also reflects the energy stored in the cavern. During the operation of the cavern, when energy needs to be released for power generation, the greater the mass of stored gas, the more energy can be converted. By monitoring the process of air injection and discharge into the cavern, the ideal total gas storage volume in the cavern can be obtained. By comparing the actual stored gas volume obtained by monitoring with the ideal value, it can be determined whether the cavern has leaked.

[0102] electronic devices

[0103] The device provided by the present invention includes a pipeline monitoring system, a storage monitoring system, a data interpretation module, a data display system, a memory and a processor.

[0104] The pipeline monitoring system is used to monitor the inlet and outlet flow rates of the gas pipeline;

[0105] The in-store monitoring system is used to monitor the in-store temperature, pressure, and radial expansion;

[0106] The data interpretation module is used to convert the analog signals obtained by the pipeline monitoring system and the in-warehouse monitoring system into digital signals;

[0107] The memory stores a leakage rate calculation program for the underground lined cavern of a compressed air energy storage power station. When the leakage rate calculation program for the underground lined cavern of a compressed air energy storage power station is executed by the processor, the steps of the leakage rate calculation method for the underground lined cavern of a compressed air energy storage power station provided by the present invention are implemented.

[0108] The present invention provides a device that uses the mass of gas filled into a chamber as a key indicator for determining whether the seal is leaking. This value not only represents the total amount of gas stored within the chamber, but also reflects the amount of energy stored. During chamber operation, when energy needs to be released for power generation, the greater the mass of stored gas, the more energy can be converted. By monitoring the process of air being injected into and discharged from the chamber, the ideal total gas volume stored within the chamber can be determined. By comparing the actual monitored gas volume with the ideal value, a leak can be determined.

[0109] Among them, see Appendix Figure 4The pipeline monitoring system uses air velocity sensors to measure the inlet and outlet flow rates. The in-reservoir monitoring system utilizes grating pressure sensors, grating temperature sensors, and grating displacement sensors, all located within the reservoir and pulled out by the pipeline. The average temperature within the underground lined chamber of the compressed air energy storage power station is measured using temperature grating sensors installed within the chamber, with the length or volume of each region being weighted averaged. The expansion rate of the underground lined chamber of the compressed air energy storage power station is calculated using radial measurements within the chamber to calculate the expansion of the chamber volume. Specifically, the leakage rate monitoring system consists of the following components: a pipeline monitoring system, an in-reservoir monitoring system, a data interpretation and storage module, a data processing module, and a data display system. The pipeline monitoring system primarily monitors the inlet and outlet flow rates of the gas pipeline and utilizes air velocity sensors. The in-reservoir monitoring system primarily monitors the internal temperature, pressure, and radial expansion of the chamber and utilizes grating pressure sensors, grating temperature sensors, and grating displacement sensors, all located within the chamber and pulled out by the pipeline. The data interpretation and storage module primarily utilizes a server to collect, interpret, and store data. The data processing module is mainly responsible for the following calculations: average temperature calculation, cavern expansion rate calculation, and leakage rate calculation. The average temperature inside the cavern is calculated by using the temperature grating sensors arranged inside the cavern, and the length or volume of each area is weighted averaged. The cavern expansion rate is calculated by using the radial quantity inside the cavern to calculate the expansion of the cavern volume. The leakage rate is calculated using the calculation formula in the first part. The above calculations are calculated once every hour and stored in units of hours. The data display system mainly includes basic cavern information, air inlet and outlet rate time history curves, cavern pressure time history curves, cavern temperature time history curves, leakage rate time history curves, and real-time numerical display of these data. Basic cavern information includes burial depth, cavern diameter, volume, pipe diameter, etc.

[0110] The device also includes an alarm device that activates and issues an alarm when the leakage rate of the compressed air energy storage power station's underground lined vault exceeds a safety threshold. In this case, the alarm device enables alarm information to be received from the ground without the need for personnel to physically enter the compressed air energy storage power station's underground lined vault. In this embodiment, the alarm information includes the precise geographic coordinates of the compressed air energy storage power station's underground lined vault, enabling personnel to accurately locate the geographic location of the compressed air energy storage power station's underground lined vault to be repaired. Furthermore, the alarm device sends maintenance instructions to the maintenance personnel closest to the compressed air energy storage power station's underground lined vault to be repaired based on the registered maintenance personnel's current location. The maintenance instructions may include specific structural parameter data, specific composition data, and leakage data of the compressed air energy storage power station's underground lined vault to be repaired, allowing maintenance personnel to prepare for repairs before actually arriving at the compressed air energy storage power station's underground lined vault, for example, by bringing spare maintenance tools, including replacement parts and tools.

[0111] Reference Figure 3 , Figure 3 This is a schematic diagram of the structure of the leakage rate calculation equipment for the underground lined cavern of a compressed air energy storage power station in the hardware operating environment involved in the embodiment of the present invention.

[0112] like Figure 3 As shown, the compressed air energy storage power station underground lined cave leakage rate calculation device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (WIreless-FIdelity, WI-FI) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM) memory, or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk memory. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0113] Those skilled in the art will understand that Figure 3The structure shown in the figure does not constitute a limitation on the leakage rate calculation device of the underground lined cavern of the compressed air energy storage power station, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0114] like Figure 3 As shown, the memory 1005 as a storage medium may include an operating system, a data storage module, a network communication module, a user interface module, and a leakage rate calculation program for an underground lined cavern of a compressed air energy storage power station.

[0115] exist Figure 3 In the compressed air energy storage power station underground lined cavern leakage rate calculation device shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the compressed air energy storage power station underground lined cavern leakage rate calculation device of the present invention can be set in the compressed air energy storage power station underground lined cavern leakage rate calculation device, and the compressed air energy storage power station underground lined cavern leakage rate calculation device calls the compressed air energy storage power station underground lined cavern leakage rate calculation program stored in the memory 1005 through the processor 1001, and executes the compressed air energy storage power station underground lined cavern leakage rate calculation method provided by the embodiment of the present invention.

[0116] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0117] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A method for calculating the leakage rate of an underground lined cavern in a compressed air energy storage power station, characterized in that: The following steps are involved: Obtaining the air mass m0 (kg) in the storage at the initial moment within the set time period Δt, wherein the air mass m0 (kg) in the storage at the initial moment within the set time period Δt is the theoretical total air mass in the underground lined cavern of the compressed air energy storage power station; Obtaining the theoretical air mass m1 (kg) in the storage at the end of the set time period Δt, wherein the theoretical air mass m1 (kg) in the storage at the end of the set time period Δt is the difference between the inflated air mass and the deflated air mass in the storage during the set time period Δt; Obtain the actual air mass m2 (kg) in the warehouse at the end of the set time period Δt, wherein the actual air mass m2 (kg) in the warehouse at the end of the set time period Δt is the actual monitored air quality in the warehouse; According to the air mass m0 (kg) in the reservoir at the initial moment within the set time period Δt, the theoretical air mass m1 (kg) in the reservoir at the end moment within the set time period Δt, and the actual air mass m2 (kg) in the reservoir at the end moment within the set time period Δt, the leakage rate of the underground lined chamber of the compressed air energy storage power station within the set time period Δt is calculated.

2. The method for calculating the leakage rate of an underground lined cavern of a compressed air energy storage power station according to claim 1 is characterized in that: In the step of obtaining the theoretical air mass m1 (kg) in the storage at the end of the set time period Δt, the calculation formula for the theoretical air mass m1 (kg) in the storage at the end of the set time period Δt is: Among them, m0 (kg) is the initial gas volume, which can be calculated through the temperature and pressure monitoring values ​​in the warehouse. is a certain inflation time period within the Δt time period, is a deflation time period within the Δt time period, yes The inflation flow rate within a certain time period, yes The deflation flow rate during time, i represents the index of different time periods, j represents that there are j inflation time periods in the Δt time period, and k represents that there are k deflation time periods in the Δt time period.

3. The method for calculating the leakage rate of an underground lined cavern of a compressed air energy storage power station according to claim 1 is characterized in that: In the step of obtaining the air quality monitoring value m2 (kg) in the warehouse at the end of the set time period Δt, the calculation formula of the air quality monitoring value m2 (kg) in the warehouse at the end of the set time period Δt is: m2=ρ×V0 (2) in, in, V0-volume of underground lined storage, m 3 , M = 0.02897 g / mol is the molar mass of air, V m is the molar volume of the gas, obtained by solving the following equation: Where, P t (Pa) is the gas pressure, R (8.314 J / (mol·K) is the ideal gas constant, T t (K) is the temperature of the gas, V m (m 3 / mol) is the molar volume of the gas, a and b are the Redlick-Kuang equation constants, which depend on the critical temperature and critical pressure of the gas. The critical temperature of air is Tc≈132.5K, and the critical pressure is Pc≈3.77×10 6 Pa.

4. The method for calculating the leakage rate of an underground lined cavern of a compressed air energy storage power station according to claim 1 is characterized in that: In the step of calculating the leakage rate of the underground lined chamber of the compressed air energy storage power station within the set time period Δt according to the theoretical air mass m1 (kg) in the chamber at the end of the set time period Δt and the monitored air quality value m2 (kg) in the chamber at the end of the set time period Δt, the calculation formula of the leakage rate δ of the underground lined chamber of the compressed air energy storage power station within the set time period Δt is:

5. The method for calculating the leakage rate of an underground lined cavern of a compressed air energy storage power station according to claim 1 is characterized in that: The set time period Δt is once per hour or once per day.

6. A device for calculating the leakage rate of an underground lined cavern in a compressed air energy storage power station, characterized in that: include: The module for obtaining the air quality in the storage at the initial moment is used to obtain the air quality m0 (kg) in the storage at the initial moment within the set time period Δt, wherein the air quality m0 (kg) in the storage at the initial moment within the set time period Δt is the theoretical total air quality in the underground lined storage of the compressed air energy storage power station; The module for obtaining the theoretical air quality in the storage at the end time is used to obtain the theoretical air quality m1 (kg) in the storage at the end time of the set time period Δt, wherein the theoretical air quality m1 (kg) in the storage at the end time of the set time period Δt is the difference between the air quality of the inflated air and the air quality of the deflated air in the storage during the set time period Δt; The module for obtaining the air quality monitoring value in the warehouse at the end time is used to obtain the air quality monitoring value m2 (kg) in the warehouse at the end time of the set time period Δt, wherein the actual air quality m2 (kg) in the warehouse at the end time of the set time period Δt is the actual monitored air quality in the warehouse; The leakage rate calculation module is used to calculate the leakage rate of the underground lined cavern of the compressed air energy storage power station within the set time period Δt based on the air mass m0 (kg) in the reservoir at the initial moment within the set time period Δt, the theoretical air mass m1 (kg) in the reservoir at the end moment within the set time period Δt, and the air quality monitoring value m2 (kg) in the reservoir at the end moment within the set time period Δt.

7. The device for calculating leakage rate of underground lined caverns of compressed air energy storage power stations according to claim 6, characterized in that: Also includes, A display device is used to display basic information of the underground lined cavern of the compressed air energy storage power station, including time-history curves of air inlet and outlet rates, time-history curves of internal pressure, time-history curves of internal temperature, time-history curves of leakage rate, and real-time values ​​corresponding to each curve; Among them, the basic information of the underground lined cavern of the compressed air energy storage power station includes burial depth, cavern diameter, volume, and pipeline diameter.

8. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a leakage rate calculation program for the underground lined cavern of a compressed air energy storage power station. When the leakage rate calculation program for the underground lined cavern of a compressed air energy storage power station is executed by the processor, the steps of the leakage rate calculation method for the underground lined cavern of a compressed air energy storage power station described in any one of claims 1-5 are implemented.

9. A device, characterized in that Including pipeline monitoring system, in-store monitoring system, data interpretation module, data display system, memory and processor, The pipeline monitoring system is used to monitor the inlet flow rate and outlet flow rate of the gas pipeline; The in-store monitoring system is used to monitor the in-store temperature, in-store pressure, and radial expansion; The data interpretation module is used to convert the analog signals obtained by the pipeline monitoring system and the in-store monitoring system into digital signals; The memory stores the leakage rate calculation program for the underground lined cavern of the compressed air energy storage power station. When the leakage rate calculation program for the underground lined cavern of the compressed air energy storage power station is executed by the processor, the steps of the leakage rate calculation method for the underground lined cavern of the compressed air energy storage power station described in any one of claims 1-5 are implemented.

10. The device according to claim 9, characterized in that The intake air flow rate and exhaust air flow rate of the pipeline monitoring system are air flow rate sensors; The in-store monitoring system uses grating pressure sensors, grating temperature sensors, and grating displacement sensors, which are arranged in the storehouse and pulled out by pipelines; The average temperature in the underground lined cave of the compressed air energy storage power station is calculated by using temperature grating sensors arranged in the cave, and the length or volume of each area is weighted averaged. The expansion rate of the underground lined cavern of the compressed air energy storage power station is calculated by using the radial quantity inside the cavern to calculate the expansion size of the cavern volume.

11. The device according to claim 9, characterized in that It also includes an alarm device, which is activated to sound an alarm when the leakage rate of the underground lined cavern of the compressed air energy storage power station exceeds a safety threshold.

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