Compressed air energy storage power station underground lining cave storage leakage rate calculation method and device, medium and equipment

Abstract

The invention discloses a method, a device, a medium and equipment for calculating the leakage rate of an underground lining cavern of a compressed air energy storage power station, and belongs to the technical field of compressed air energy storage power stations. The method comprises the following steps that the in-warehouse air quality m0 (kg) at the initial moment within a set time period delta t, the in-warehouse theoretical air quality m1 (kg) at the end moment within the set time period delta t and the in-warehouse actual air quality m2 (kg) at the end moment within the set time period delta t are obtained; according to the in-reservoir air mass m0 (kg) at the initial moment within the set time period delta t, the in-reservoir air mass m1 (kg) at the end moment within the set time period delta t and the in-reservoir air mass m2 (kg) at the end moment within the set time period delta t, the leakage rate of the underground lining cavern reservoir of the compressed air energy storage power station within the set time period delta t is obtained through calculation. The device, the medium and the equipment can be used for realizing the method. The leakage rate of the underground lining chamber of the compressed air energy storage power station can be monitored in real time, and the operation safety of the underground lining chamber of the compressed air energy storage power station is guaranteed.

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] Air tightness is one of the most critical properties of underground lined caverns for compressed air energy storage, which directly affects the safety and efficiency of the energy storage system. At present, the sealing layer materials widely used in underground lined caverns 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 cavern, there will be slow leakage of gas and a certain leakage rate. In contrast, steel lining is an impermeable material with 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 is the slow leakage of polymer materials or the local leakage of steel lining materials caused by weld defects, these are directly related to the safety and long-term stability of the mine. If the leakage problem cannot be controlled in a timely and effective manner, it may lead to energy loss, reduced operating efficiency, and even cause safety hazards. Therefore, establishing a scientific and reasonable sealing layer leakage judgment criterion can help identify and prevent potential leakage problems at an early stage, and provide technical support and guarantee for the long-term stable operation of the mine. 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. By comparing the actual storage gas volume obtained by monitoring with the ideal value, it can be determined whether a leak occurs in the cavern, which is more suitable for practical use.

[0005] In order to achieve the above first purpose, the technical solution of the method for calculating the leakage rate of the underground lined cavern of the compressed air energy storage power station provided by the present invention is 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] Obtain the air mass m0 (kg) in the warehouse at the initial moment within the set time period Δt, wherein the air mass m0 (kg) in the warehouse 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 within the set time period Δt;

[0009] Obtaining 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 quality m0 (kg) in the warehouse at the initial moment within the set time period Δt, the theoretical air quality m1 (kg) in the warehouse at the end moment within the set time period Δt, and the air quality monitoring value m2 (kg) in the warehouse 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 the underground lined cavern of the 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 warehouse at the end of the set time period Δt, the calculation formula of the theoretical air mass m1 (kg) in the warehouse at the end of the set time period Δt is:

[0013]

[0014] Among them, m0 (kg) is the initial gas volume, which can be obtained through the temperature and pressure monitoring values ​​in the warehouse. yes The inflation flow rate during the time, yes The outflow rate within a certain period of time.

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

[0021] V m is the molar volume of the gas, obtained by solving the following equation:

[0022]

[0023] 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-Kwong equation constants, which depend on the critical temperature and critical pressure of the gas.

[0024]

[0025] The critical temperature of air is Tc≈132.5K, and the critical pressure is Pc≈3.77×10 6 Pa.

[0026] Preferably, according to the theoretical air mass m1 (kg) in the storage at the end of the set time period Δt and the monitored air quality value m2 (kg) in the storage at the end of the set time period Δt, in the step of calculating the leakage rate of the underground lined storage of the compressed air energy storage power station within the set time period Δt, the calculation formula of the leakage rate δ of the underground lined storage of the compressed air energy storage power station within the set time period Δt is:

[0027]

[0028] Preferably, the set time period Δt is once per hour.

[0029] In order to achieve the above second purpose, the technical solution of the leakage rate calculation device of the underground lined cavern of the compressed air energy storage power station provided by the present invention is as follows:

[0030] The invention provides a device for calculating the leakage rate of an underground lined cavern of a compressed air energy storage power station, comprising:

[0031] The air quality acquisition module at the initial moment is used to obtain the air quality m0 (kg) at the initial moment in the set time period Δt, wherein the air quality m0 (kg) at the initial moment in the set time period Δt is the theoretical total air quality in the underground lined cavern of the compressed air energy storage power station;

[0032] The module for acquiring the theoretical air quality in the warehouse at the end time is used to acquire the theoretical air quality m1 (kg) in the warehouse at the end time of the set time period Δt, wherein the theoretical air quality m1 (kg) in the warehouse at the end time of the set time period Δt is the difference between the air quality of inflation and the air quality of deflation in the warehouse within the set time period Δt;

[0033] The air quality acquisition module at the end time of the warehouse is used to obtain the air quality monitoring value m2 (kg) of the warehouse at the end time of the set time period Δt, wherein the air quality monitoring value m2 (kg) of the warehouse at the end time of the set time period Δt is the actual monitored air quality in the warehouse;

[0034] The leakage rate calculation module is used to calculate the leakage rate of the underground lined chamber of the compressed air energy storage power station within the set time period Δt based on the air mass m0 (kg) in the chamber at the initial moment within the set time period Δt, the theoretical air mass m1 (kg) in the chamber at the end moment within the set time period Δt, and the air quality monitoring value m2 (kg) in the chamber at the end moment within the set time period Δt.

[0035] The device for calculating the leakage rate of underground lined caverns in a compressed air energy storage power station provided by the present invention can also be further implemented by adopting the following technical measures.

[0036] Preferably, the compressed air energy storage power station underground lined cavern leakage rate calculation device further includes:

[0037] A display device is used to display basic information of the underground lined cavern of the compressed air energy storage power station, time history curves of air inlet and outlet rates, time history curves of pressure inside the cavern, time history curves of temperature inside the cavern, time history curves of leakage rate, and real-time values ​​corresponding to each curve;

[0038] 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.

[0039] 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:

[0040] 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.

[0041] In order to achieve the fourth objective, the technical solution of the device provided by the present invention is as follows:

[0042] 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.

[0043] The pipeline monitoring system is used to monitor the intake and exhaust flow rates of the gas pipeline;

[0044] The in-store monitoring system is used to monitor the in-store temperature, in-store pressure, and radial expansion;

[0045] The data interpretation module is used to convert the analog signals acquired by the pipeline monitoring system and the in-store monitoring system into digital signals;

[0046] 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.

[0047] The device provided by the present invention can also be further implemented by adopting the following technical measures.

[0048] As a preference,

[0049] The inlet air flow rate and exhaust air flow rate of the pipeline monitoring system are air flow rate sensors;

[0050] 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;

[0051] The average temperature in the underground lined cavern of the compressed air energy storage power station is calculated by using a temperature grating sensor arranged in the cavern, and the length or volume of each area is weighted averaged.

[0052] 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.

[0053] Preferably, the equipment further comprises an alarm device, and when the leakage rate of the underground lined chamber of the compressed air energy storage power station exceeds a safety threshold, the alarm device is activated to generate an alarm.

[0054] 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 a sealing layer leaks. 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, and then the actual stored gas volume obtained by monitoring is compared with the ideal value to determine whether the cavern is leaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0056] 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;

[0057] Figure 2 A schematic diagram of the signal flow relationship between the functional modules in the leakage rate calculation device for the underground lined cavern of the compressed air energy storage power station provided by the embodiment of the present invention;

[0058] 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;

[0059] Figure 4 A schematic diagram of the functions and layout of an electronic device provided by an embodiment of the present invention;

[0060] Description of reference numerals:

[0061] 1- Real-time numerical display of air inlet or outlet rate, 2- Real-time numerical display of pressure inside the warehouse, 3- Real-time numerical display of temperature inside the warehouse, 4- Real-time numerical display of leakage rate. DETAILED DESCRIPTION

[0062] 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, thereby being more suitable for practical use.

[0063] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of the leakage rate calculation method, device, medium and equipment of the underground lining cavern of the compressed air energy storage power station proposed by the present invention, its specific implementation method, structure, characteristics and effects, in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, the features, structures, or characteristics in one or more embodiments may be combined in any suitable form.

[0064] The term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B. Specifically, it is understood that: 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 be met.

[0065] Calculation method for leakage rate of underground lined caverns in compressed air energy storage power stations

[0066] 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 comprises the following steps:

[0067] Step S1: Obtain the air mass m0 (kg) in the warehouse at the initial moment within the set time period Δt, wherein the air mass m0 (kg) in the warehouse 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;

[0068] Step S2: Obtain the theoretical air mass m1 (kg) in the warehouse at the end of the set time period Δt, wherein the theoretical air mass m1 (kg) in the warehouse at the end of the set time period Δt is the difference between the inflation air mass and the deflation air mass in the warehouse within the set time period Δt;

[0069] 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;

[0070] Step S4: Based on the air quality m0 (kg) in the warehouse at the initial moment within the set time period Δt, the theoretical air quality m1 (kg) in the warehouse at the end moment within the set time period Δt, and the air quality monitoring value m2 (kg) in the warehouse 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.

[0071] 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 a sealing layer leaks. 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, and then the actual stored gas volume obtained by monitoring is compared with the ideal value to determine whether the cavern is leaking.

[0072] Among them, in the step of obtaining the theoretical air mass m1 (kg) in the warehouse at the end time of the set time period Δt, the calculation formula of the theoretical air mass m1 (kg) in the warehouse at the end time of the set time period Δt is:

[0073]

[0074] Among them, m0 (kg) is the initial gas volume, which can be obtained through the temperature and pressure monitoring values ​​in the warehouse. yes The inflation flow rate during the time, yes The outflow rate within a certain period of time.

[0075] Among them, 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:

[0076] m2=ρ×V0(2)

[0077] in,

[0078]

[0079] in,

[0080] M = 0.02897 g / mol is the molar mass of air,

[0081] V m is the molar volume of the gas, obtained by solving the following equation:

[0082]

[0083] 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-Kwong equation constants, which depend on the critical temperature and critical pressure of the gas.

[0084]

[0085]

[0086] The critical temperature of air is Tc≈132.5K, and the critical pressure is Pc≈3.77×10 6 Pa.

[0087] Among them, according to the theoretical air quality m1 (kg) in the warehouse at the end of the set time period Δt and the air quality monitoring value m2 (kg) in the warehouse at the end of the set time period Δt, 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, 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:

[0088]

[0089] The time period Δt is set to once per hour or once per day.

[0090] Compressed air energy storage power station underground lined cavern leakage rate calculation device

[0091] See attached Figure 2 The leakage rate calculation device for underground lined caverns of compressed air energy storage power stations provided by the embodiment of the present invention comprises:

[0092] The air quality acquisition module at the initial moment is used to obtain the air quality m0 (kg) at the initial moment in the set time period Δt, wherein the air quality m0 (kg) at the initial moment in the set time period Δt is the theoretical total air quality in the underground lined cavern of the compressed air energy storage power station;

[0093] The module for acquiring the theoretical air quality in the warehouse at the end time is used to acquire the theoretical air quality m1 (kg) in the warehouse at the end time of the set time period Δt, wherein the theoretical air quality m1 (kg) in the warehouse at the end time of the set time period Δt is the difference between the air quality of inflation and the air quality of deflation in the warehouse within the set time period Δt;

[0094] The module for acquiring the air quality monitoring value in the warehouse at the end time is used to acquire 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;

[0095] 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 according to the air quality m0 (kg) in the warehouse at the initial moment within the set time period Δt, the theoretical air quality m1 (kg) in the warehouse at the end moment within the set time period Δt, and the air quality monitoring value m2 (kg) in the warehouse at the end moment within the set time period Δt.

[0096] An embodiment of the present invention provides a leakage rate calculation device for an underground lined cavern of 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 a sealing layer leaks. 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, and then the actual stored gas volume obtained by monitoring is compared with the ideal value to determine whether the cavern is leaking.

[0097] Among them, the leakage rate calculation device of the underground lined cavern of the compressed air energy storage power station also includes a display device for displaying the basic information of the underground lined cavern of the compressed air energy storage power station, the time history curves of the air inlet and outlet rates, the time history curves of the pressure inside the cavern, the time history curves of the temperature inside the cavern, the time history curves of the leakage rate, and the 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 the burial depth, cavern diameter, volume, and pipeline diameter. In this case, the relevant staff can intuitively understand the relevant information, data, and data trends through the display device, which can ensure the safe operation of the underground lined cavern of the compressed air energy storage power station and improve work efficiency.

[0098] Computer readable storage medium

[0099] 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.

[0100] 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 is leaking. 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, and then the actual stored gas volume obtained by monitoring is compared with the ideal value to determine whether the cavern is leaking.

[0101] Electronic devices

[0102] 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.

[0103] The pipeline monitoring system is used to monitor the inlet and outlet flow rates of the gas pipeline;

[0104] The in-store monitoring system is used to monitor the in-store temperature, in-store pressure, and radial expansion;

[0105] 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;

[0106] 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.

[0107] The present invention provides a device, in which the mass of gas filled in the cavern can be used as a key indicator to judge whether the sealing layer leaks. 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 gas stored, 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, and then the actual stored gas volume obtained by monitoring is compared with the ideal value to determine whether the cavern leaks.

[0108] Among them, see Appendix Figure 4, the air flow rate and exhaust 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 the pipeline; the average temperature in the underground lining cavern of the compressed air energy storage power station uses the temperature grating sensor arranged in the storehouse, and the length or volume of each area is weighted averaged; the expansion rate of the underground lining cavern of the compressed air energy storage power station is calculated by using the radial volume in the storehouse to calculate the expansion size of the cavern volume. Specifically, the leakage rate monitoring system consists of the following parts: pipeline monitoring system, in-store monitoring system, data interpretation storage module, data processing module, and data display system. The pipeline monitoring system mainly monitors the air flow rate and exhaust flow rate of the gas transmission pipeline. Air flow rate sensors are used. The in-store monitoring system mainly monitors the temperature, pressure, and radial expansion in the storehouse. Grating pressure sensors, grating temperature sensors, and grating displacement sensors are used, which are arranged in the storehouse and pulled out by the pipeline. The data interpretation storage module mainly uses 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 calculation in the cavern uses the temperature grating sensor arranged in the cavern to perform weighted average calculation on the length or volume of each area. The cavern expansion rate calculation uses the radial quantity in the cavern to calculate the expansion size of the cavern volume. The leakage rate calculation uses the calculation formula in the first part to calculate the leakage rate. The above calculations are calculated once every hour and stored in units of hours. The data display system mainly includes the basic information of the cavern, the time history curves of the air intake and outlet rates, the time history curves of the pressure in the cavern, the time history curves of the temperature in the cavern, the time history curves of the leakage rate, and the real-time numerical display of these data. The basic information of the cavern includes the burial depth, cavern diameter, volume, pipe diameter, etc.

[0109] Among them, the equipment also includes an alarm device. When the leakage rate of the underground liner of the compressed air energy storage power station exceeds the safety threshold, the alarm device is activated to realize the alarm. In this case, through the alarm device, it is possible to obtain the alarm information on the ground without actually entering the underground liner of the compressed air energy storage power station. In this embodiment, the alarm information includes the precise geographic coordinates of the underground liner of the compressed air energy storage power station. In this case, the staff can accurately find the geographical location of the underground liner of the compressed air energy storage power station to be repaired. In addition, the alarm device will also send maintenance instructions to the maintenance staff closest to the underground liner of the compressed air energy storage power station to be repaired according to the current location of the registered maintenance staff, wherein the maintenance instructions may include the specific structural parameter data, specific composition data, and leakage data of the underground liner of the compressed air energy storage power station to be repaired, so that the maintenance staff can make maintenance preparations before actually arriving at the underground liner of the compressed air energy storage power station to be repaired, for example, carrying spare maintenance tools, including parts and maintenance tools that need to be replaced.

[0110] Reference Figure 3 , Figure 3 This is 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 involved in an embodiment of the present invention.

[0111] like Figure 3 As shown, the leakage rate calculation device for the underground lining cavern of the compressed air energy storage power station 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 optional 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.

[0112] 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 a combination of certain components, or a different arrangement of components.

[0113] 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.

[0114] exist Figure 3 In the leakage rate calculation device for the underground lined cavern of the compressed air energy storage power station 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 leakage rate calculation device for the underground lined cavern of the compressed air energy storage power station of the present invention can be arranged in the leakage rate calculation device for the underground lined cavern of the compressed air energy storage power station, and the leakage rate calculation device for the underground lined cavern of the compressed air energy storage power station calls the leakage rate calculation program for the underground lined cavern of the compressed air energy storage power station stored in the memory 1005 through the processor 1001, and executes the leakage rate calculation method for the underground lined cavern of the compressed air energy storage power station provided in the embodiment of the present invention.

[0115] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other 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.

[0116] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for calculating the leakage rate of an underground lined cavern of a compressed air energy storage power station, characterized in that: The following steps are involved: Obtain the air mass m0 (kg) in the warehouse at the initial moment within the set time period Δt, wherein the air mass m0 (kg) in the warehouse 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 within the set time period Δt; Obtaining the actual air quality m2 (kg) in the warehouse at the end of the set time period Δt, wherein the actual air quality 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 warehouse at the initial moment within the set time period Δt, the theoretical air mass m1 (kg) in the warehouse at the end moment within the set time period Δt, and the actual air mass m2 (kg) in the warehouse 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 the underground lined cavern of the 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 warehouse at the end of the set time period Δt, the calculation formula of the theoretical air mass m1 (kg) in the warehouse at the end of the set time period Δt is: Among them, m0 (kg) is the initial gas volume, which can be obtained through the temperature and pressure monitoring values ​​in the warehouse. yes The inflation flow rate during the time, yes The outflow rate within a certain period of time.

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 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: m2=ρ×V0 (2) in, in, 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-Kwong 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: According to the theoretical air quality m1 (kg) in the warehouse at the end of the set time period Δt and the monitored air quality value m2 (kg) in the warehouse at the end of the set time period Δt, 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, 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:

5. The method for calculating the leakage rate of the underground lined cavern of the 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 air quality acquisition module at the initial moment is used to obtain the air quality m0 (kg) at the initial moment in the set time period Δt, wherein the air quality m0 (kg) at the initial moment in the set time period Δt is the theoretical total air quality in the underground lined cavern of the compressed air energy storage power station; The module for acquiring the theoretical air quality in the warehouse at the end time is used to acquire the theoretical air quality m1 (kg) in the warehouse at the end time of the set time period Δt, wherein the theoretical air quality m1 (kg) in the warehouse at the end time of the set time period Δt is the difference between the air quality of inflation and the air quality of deflation in the warehouse within the set time period Δt; The module for acquiring the air quality monitoring value in the warehouse at the end time is used to acquire 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 chamber of the compressed air energy storage power station within the set time period Δt based on the air mass m0 (kg) in the chamber at the initial moment within the set time period Δt, the theoretical air mass m1 (kg) in the chamber at the end moment within the set time period Δt, and the air quality monitoring value m2 (kg) in the chamber 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 station 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, time history curves of air inlet and outlet rates, time history curves of pressure inside the cavern, time history curves of temperature inside the cavern, 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 an underground lined cavern of a compressed air energy storage power station. When the leakage rate calculation program for an 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 an 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 intake and exhaust flow rates 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 acquired 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 inlet 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 cavern of the compressed air energy storage power station is calculated by using a temperature grating sensor arranged in the cavern, and the length or volume of each area is weighted averaged. The expansion rate calculation of the underground lined cavern of the compressed air energy storage power station adopts the radial quantity inside the cavern to calculate the expansion size of the cavern volume; Preferably, the equipment further comprises an alarm device, and when the leakage rate of the underground lined chamber of the compressed air energy storage power station exceeds a safety threshold, the alarm device is activated to generate an alarm.

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