Operation adjustment method and device of compressed air energy storage system

Abstract

This specification provides an operation adjustment method and device for a compressed air energy storage system. Before specific implementation, the expansion section structure of the compressed air energy storage system can be improved first. During specific implementation, the target grid-connected parameters, target initial parameters, and target reference parameters of the compressed air energy storage system can be obtained first, and the target prediction parameters of the compressed air energy storage system for expansion power generation can be determined; then, the matching target adjustment rules are determined based on the operation scenario type of the expansion power generation of the compressed air energy storage system; according to the target adjustment rules, during the expansion power generation of the compressed air energy storage system, the main gas adjustment module and / or the supplementary gas adjustment module of the expansion section are adjusted accordingly. In this way, the residual energy of the expander exhaust can be effectively recovered and utilized, the operating parameters of the expansion section system can be finely adjusted, and the air intake flow of the expander can be increased at the same time, so as to obtain a better expansion power generation effect, thereby better meeting the grid connection requirements of the power grid.

Description

Technical Field

[0001] This specification belongs to the field of compressed air energy storage technology, and in particular to an operation adjustment method and device for a compressed air energy storage system. Background Art

[0002] Compressed air energy storage is an important energy storage method. Among them, compressed air energy storage power stations usually involve two processes: compression energy storage process and expansion energy release process. Specifically, during the low load period of the power grid, the compressor can consume the excess electricity from the power grid to compress the gas and store it in the gas storage equipment; during the peak load period of the power grid, the high-pressure gas in the gas storage equipment can be released to drive the air turbine to generate electricity and obtain corresponding electricity.

[0003] However, based on the existing technology, when using the compressed air energy storage system, especially the expansion section of the compressed air energy storage system, the pressure of the gas storage reservoir will continue to decrease with the power generation process, and the expander needs to maintain stable power generation and a long power generation time as much as possible under a large pressure range of the gas storage reservoir (the pressure change range is limited by the volume of the gas storage reservoir, and the range can reach 2MPa to 6MPa or even more). Therefore, a series of adjustment measures need to be taken to maximize the work capacity of the turbine expander. When adjusting based on the existing method, the effect is often not ideal, resulting in the inability to meet the grid connection requirements of the power grid.

[0004] To address the above problems, no effective solution has been proposed yet. Summary of the invention

[0005] The present specification provides an operation adjustment method and device for a compressed air energy storage system, which can effectively recycle and utilize the residual energy of the expander exhaust, finely adjust the operating parameters such as gas pressure in the expansion section system, and effectively increase the expander intake flow rate, so that the compressed air energy storage system can operate continuously and stably for a long time according to the operating conditions, obtain better expansion power generation effect, and thus better meet the grid connection requirements.

[0006] The present specification provides an operation regulation method of a compressed air energy storage system, which is applied to a compressed air energy storage system, wherein the expansion section of the compressed air energy storage system at least includes: a main gas regulation module and a supplementary gas regulation module; wherein the main gas regulation module is arranged in the main gas pipeline between the first gas-water heat exchanger and the gas storage equipment, and the supplementary gas regulation module is arranged in the supplementary gas pipeline between the first-stage expander and the gas storage equipment; the main gas regulation module includes: a first main gas regulation branch and a second main gas regulation branch; the first main gas regulation branch is at least connected to a first ejector; the ejection fluid interface of the first ejector is at least connected to the exhaust port of the first-stage expander and the exhaust port of the second-stage expander; the supplementary gas regulation module includes: a first supplementary gas regulation branch and a second supplementary gas regulation branch; the first supplementary gas regulation branch is at least connected to a second ejector; the ejection fluid interface of the second ejector is at least connected to the exhaust port of the second-stage expander and the exhaust port of the third-stage expander; the second main gas regulation branch and the second supplementary gas regulation branch are respectively connected to corresponding regulating valves; the method includes:

[0007] Obtain target grid-connected parameters, target initial parameters, and target reference parameters of the compressed air energy storage system; wherein the target grid-connected parameters include: target power generation, target response time, target power generation time, and the target initial parameters include: the initial value of the total amount of gas in the gas storage equipment, and the initial value of the gas pressure in the gas storage equipment; the target reference parameters include: the pressure design value of the air inlet of the first-stage expander, the first response time based on the regulating valve mode, and the second response time based on the ejector mode;

[0008] According to the target grid connection parameters and the target initial parameters, the target prediction parameters of the compressed air energy storage system for expansion power generation are determined; wherein the target prediction parameters include: the predicted value of power generation duration, and the predicted value of the gas pressure in the gas storage equipment when power generation ends;

[0009] Determine the operation scenario type of expansion power generation of the compressed air energy storage system according to the target grid-connected parameters, the target initial parameters, the target reference parameters, and the target prediction parameters;

[0010] According to the operation scenario type of the expansion power generation of the compressed air energy storage system, a matching target regulation rule is determined from a preset regulation rule set;

[0011] According to the target regulation rule, during the expansion and power generation process of the compressed air energy storage system, the main air regulation module and / or the supplementary air regulation module of the expansion section are adjusted accordingly.

[0012] In one embodiment, the first main gas regulating branch is connected to a first regulating valve, the second main gas regulating branch is connected to a second regulating valve, the first supplementary gas regulating branch is connected to a third regulating valve, the second supplementary gas regulating branch is connected to a fourth regulating valve, a first switch valve is further provided on the main gas pipeline between the gas storage equipment and the main gas regulating module, and a second switch valve is further provided on the supplementary gas pipeline between the gas storage equipment and the supplementary gas regulating module; the method further comprises:

[0013] When the initial value of the gas pressure in the gas storage equipment is greater than the pressure design value of the air inlet of the first-stage expander, the predicted value of the gas pressure in the gas storage equipment at the end of power generation is greater than the pressure design value of the air inlet of the first-stage expander, the predicted value of the power generation time is greater than the target power generation time, and the target response time is greater than the first response time and less than the second response time, it is determined that the operation scenario type of the expansion power generation of the compressed air energy storage system is the first scenario type;

[0014] Accordingly, according to the target regulation rule, during the expansion and power generation process of the compressed air energy storage system, the main air regulation module and / or the supplementary air regulation module of the expansion section are regulated accordingly, including:

[0015] Control the first switch valve to open and the second switch valve to close;

[0016] The opening of the first regulating valve is adjusted to 0, and the opening of the second regulating valve is adjusted to a matching first initial opening, so as to deliver gas to the first-stage expander through the second main gas regulating branch;

[0017] During the expansion power generation process, the opening of the second regulating valve is dynamically adjusted according to the gas pressure in the gas storage equipment so that the gas pressure at the air inlet of the first-stage expander meets the preset working condition requirements.

[0018] In one embodiment, the method further comprises:

[0019] When the initial value of the gas pressure in the gas storage equipment is greater than the pressure design value of the air inlet of the first-stage expander, the predicted value of the gas pressure in the gas storage equipment at the end of power generation is greater than the pressure design value of the air inlet of the first-stage expander, the predicted value of the power generation time is greater than the target power generation time, and the target response time is greater than the second response time, it is determined that the operation scenario type of the expansion power generation of the compressed air energy storage system is the second scenario type;

[0020] Accordingly, according to the target regulation rule, during the expansion and power generation process of the compressed air energy storage system, the main air regulation module and / or the supplementary air regulation module of the expansion section are regulated accordingly, including:

[0021] Control the first switch valve to open and the second switch valve to close;

[0022] The opening of the second regulating valve is adjusted to 0, and the opening of the first regulating valve is adjusted to a matching second initial opening;

[0023] At least one of the pipelines between the ejection fluid interface of the first ejector and the exhaust port of the first-stage expander and the pipelines between the ejection fluid interface of the first ejector and the exhaust port of the second-stage expander is connected to introduce the exhaust gas of the first-stage expander and / or the exhaust gas of the second-stage expander as the ejection fluid to regulate the gas delivered by the first main gas regulating branch to the first-stage expander;

[0024] During the expansion power generation process, the opening of the first regulating valve is dynamically adjusted according to the gas pressure in the gas storage equipment so that the gas pressure at the air inlet of the first-stage expander meets the preset working condition requirements.

[0025] In one embodiment, corresponding auxiliary regulating valves are respectively provided on the pipeline between the ejection fluid interface of the first ejector and the exhaust port of the first-stage expander, and on the pipeline between the ejection fluid interface of the first ejector and the exhaust port of the second-stage expander;

[0026] Accordingly, the method further includes:

[0027] During the expansion power generation process, the opening of the first regulating valve and / or the opening of the corresponding auxiliary regulating valve is dynamically adjusted according to the gas pressure in the gas storage equipment so that the gas pressure at the air inlet of the first-stage expander meets the preset operating conditions.

[0028] In one embodiment, a buffer container is provided at the intersection of the first main gas regulating branch and the second main gas regulating branch near the first-stage expander; wherein the buffer container is connected to the air inlet of the first-stage expander through a pipeline through the first gas-water heat exchanger;

[0029] Accordingly, the method further includes:

[0030] During the expansion power generation process, the opening of the first regulating valve and the opening of the second regulating valve are jointly adjusted according to the gas pressure in the gas storage equipment, so as to respectively deliver the corresponding gas to the buffer container through the first main gas regulating branch and the second main gas regulating branch; and the buffer container is used to buffer and mix the gas so that the gas pressure at the air inlet of the first-stage expander meets the preset operating conditions.

[0031] In one embodiment, the method further comprises:

[0032] When the initial value of the gas pressure in the gas storage equipment is greater than the pressure design value of the air inlet of the first-stage expander, the predicted value of the gas pressure in the gas storage equipment when power generation ends is less than or equal to the pressure design value of the air inlet of the first-stage expander, the predicted value of the power generation time is greater than the target power generation time, and the target response time is greater than the first response time and less than the second response time, it is determined that the operation scenario type of the expansion power generation of the compressed air energy storage system is the third scenario type;

[0033] Accordingly, according to the target regulation rule, during the expansion and power generation process of the compressed air energy storage system, the main air regulation module and / or the supplementary air regulation module of the expansion section are regulated accordingly, including:

[0034] Control the first switch valve to open and the second switch valve to close;

[0035] The opening of the first regulating valve is adjusted to 0, and the opening of the second regulating valve is adjusted to a matching third initial opening, so as to deliver gas to the first-stage expander through the second main gas regulating branch;

[0036] During the expansion power generation process, the opening of the second regulating valve is dynamically adjusted according to the gas pressure in the gas storage equipment so that the gas pressure at the air inlet of the first-stage expander meets the preset working condition requirements;

[0037] When the detected gas pressure in the gas storage equipment is less than or equal to the pressure design value of the gas inlet of the first-stage expander, the second switch valve is controlled to open;

[0038] The opening of the third regulating valve is adjusted to 0, and the opening of the fourth regulating valve is adjusted to a matching opening, so as to deliver gas to the first-stage expander through the first gas replenishment regulating branch for gas replenishment regulation;

[0039] During the expansion power generation process, the opening of the second regulating valve and the opening of the fourth regulating valve are jointly adjusted according to the gas pressure in the gas storage equipment so that the gas pressure at the air inlet of the first-stage expander meets the preset operating conditions.

[0040] In one embodiment, a gas pressure sensor is further provided on the pipeline between the gas supply regulating module and the first-stage expander; wherein the gas pressure sensor is used to collect the pressure of the gas output by the gas supply regulating module;

[0041] Accordingly, the method further includes:

[0042] According to the pressure of the gas output by the gas supply regulating module, the access position of the gas output by the gas supply regulating module on the first-stage expander is adjusted.

[0043] In one embodiment, after controlling the second switch valve to open, the method further includes:

[0044] Adjust the opening of the fourth regulating valve to 0, and adjust the opening of the third regulating valve to a matching opening;

[0045] At least one of the pipelines between the ejection fluid interface of the second ejector and the exhaust port of the third-stage expander and the pipelines between the ejection fluid interface of the second ejector and the exhaust port of the second-stage expander is connected to introduce the exhaust of the third-stage expander and / or the exhaust of the second-stage expander as ejection fluid to regulate the gas transported by the first gas supplement regulating branch to the first-stage expander;

[0046] During the expansion power generation process, the opening of the second regulating valve and the opening of the third regulating valve are jointly adjusted according to the gas pressure in the gas storage equipment so that the gas pressure at the air inlet of the first-stage expander meets the preset operating conditions.

[0047] In one embodiment, the method further comprises:

[0048] When the initial value of the gas pressure in the gas storage equipment is less than or equal to the pressure design value of the air inlet of the first-stage expander, the predicted value of the gas pressure in the gas storage equipment when power generation ends is less than or equal to the pressure design value of the air inlet of the first-stage expander, and the predicted value of the power generation duration is greater than the second response duration, it is determined that the operation scenario type of the expansion power generation of the compressed air energy storage system is the fourth scenario type;

[0049] Accordingly, according to the target regulation rule, during the expansion and power generation process of the compressed air energy storage system, the main air regulation module and / or the supplementary air regulation module of the expansion section are regulated accordingly, including:

[0050] Controlling the first switch valve and the second switch valve to open;

[0051] Adjust the opening of the second regulating valve to 0, and adjust the opening of the first regulating valve to a matching opening; at the same time, adjust the opening of the fourth regulating valve to 0, and adjust the opening of the third regulating valve to a matching opening;

[0052] At least one of the pipelines between the ejection fluid interface of the first ejector and the exhaust port of the first-stage expander and the pipelines between the ejection fluid interface of the first ejector and the exhaust port of the second-stage expander is connected; at the same time, at least one of the pipelines between the ejection fluid interface of the second ejector and the exhaust port of the third-stage expander and the pipelines between the ejection fluid interface of the third ejector and the exhaust port of the second-stage expander is connected;

[0053] During the expansion power generation process, the opening of the first regulating valve and the opening of the third regulating valve are jointly adjusted according to the gas pressure in the gas storage equipment so that the gas pressure at the air inlet of the first-stage expander meets the preset working condition requirements.

[0054] The present specification also provides an operation regulation device of a compressed air energy storage system, which is applied to a compressed air energy storage system, wherein the expansion section of the compressed air energy storage system at least includes: a main gas regulation module and a supplementary gas regulation module; wherein the main gas regulation module is arranged in the main gas pipeline between the first gas-water heat exchanger and the gas storage equipment, and the supplementary gas regulation module is arranged in the supplementary gas pipeline between the first-stage expander and the gas storage equipment; the main gas regulation module includes: a first main gas regulation branch and a second main gas regulation branch; the first main gas regulation branch is at least connected to a first ejector; the ejection fluid interface of the first ejector is at least connected to the exhaust port of the first-stage expander and the exhaust port of the second-stage expander; the supplementary gas regulation module includes: a first supplementary gas regulation branch and a second supplementary gas regulation branch; the first supplementary gas regulation branch is at least connected to a second ejector; the ejection fluid interface of the second ejector is at least connected to the exhaust port of the second-stage expander and the exhaust port of the third-stage expander; the second main gas regulation branch and the second supplementary gas regulation branch are respectively connected to corresponding regulating valves; the device includes:

[0055] An acquisition module is used to acquire target grid-connected parameters, target initial parameters, and target reference parameters of a compressed air energy storage system; wherein the target grid-connected parameters include: target power generation, target response time, target power generation time, and the target initial parameters include: the initial value of the total amount of gas in the gas storage equipment and the initial value of the gas pressure in the gas storage equipment; the target reference parameters include: the pressure design value of the air inlet of the first-stage expander, the first response time based on the regulating valve mode, and the second response time based on the ejector mode;

[0056] The first determination module is used to determine the target prediction parameters of the compressed air energy storage system for expansion power generation according to the target grid-connected parameters and the target initial parameters; wherein the target prediction parameters include: the predicted value of power generation time and the predicted value of the gas pressure in the gas storage equipment when power generation ends;

[0057] The second determination module is used to determine the operation scenario type of expansion power generation of the compressed air energy storage system according to the target grid-connected parameters, the target initial parameters, the target reference parameters, and the target prediction parameters;

[0058] A third determination module is used to determine a matching target regulation rule from a preset regulation rule set according to the operation scenario type of expansion power generation of the compressed air energy storage system;

[0059] The regulating module is used to adjust the main air regulating module and / or the supplementary air regulating module of the expansion section accordingly during the expansion and power generation process of the compressed air energy storage system according to the target regulating rules.

[0060] This specification also provides a computer device, including a processor and a memory for storing processor executable instructions, and the processor implements the relevant steps of the operation adjustment method of the compressed air energy storage system when executing the instructions.

[0061] The present specification also provides a computer-readable storage medium having computer instructions stored thereon, which, when executed by a processor, implement the steps of the operation adjustment method of the compressed air energy storage system.

[0062] Based on the operation adjustment method and device of the compressed air energy storage system provided in this specification, before the specific implementation, the expansion section structure of the compressed air energy storage system can be improved first, and a main air adjustment module including a first main air adjustment branch and a second main air adjustment branch, and a supplementary air adjustment module including a first supplementary air adjustment branch and a second supplementary air adjustment branch are added; wherein the first main air adjustment branch is connected to at least a first ejector, and the first supplementary air adjustment branch is connected to at least a second ejector. During specific implementation, the target grid-connected parameters, target initial parameters, and target reference parameters of the compressed air energy storage system can be obtained first; based on the target grid-connected parameters and the target initial parameters, the target prediction parameters of the compressed air energy storage system for expansion power generation can be determined; based on the target grid-connected parameters, the target initial parameters, the target reference parameters, and the target prediction parameters, the operating scenario type of expansion power generation of the compressed air energy storage system can be determined; based on the operating scenario type of expansion power generation of the compressed air energy storage system, a matching target adjustment rule can be determined from a preset adjustment rule set; based on the target adjustment rule, during the process of expansion power generation of the compressed air energy storage system, the main gas adjustment module and / or the supplementary gas adjustment module of the expansion section are adjusted accordingly. By finely distinguishing different types of expansion power generation operation scenarios, and for different types of expansion power generation operation scenarios, determining and adjusting the main gas regulation module and / or the air supply regulation module of the expansion section according to the matching target adjustment rules, it is possible to effectively recycle the residual energy of the expander exhaust gas, and finely adjust the operating parameters such as gas pressure in the expansion section system. At the same time, it is also possible to effectively increase the expander intake flow rate, so that the compressed air energy storage system can operate continuously and stably for a long time according to the operating conditions, obtain better expansion power generation effects, and thus better meet the grid connection requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] In order to more clearly illustrate the embodiments of this specification, the drawings required for use in the embodiments will be briefly introduced below. The drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0064] Figure 1is a flow chart of an operation adjustment method of a compressed air energy storage system provided by an embodiment of this specification;

[0065] Figure 2 is a schematic diagram of the structure of an improved compressed air energy storage system provided by an embodiment of this specification;

[0066] Figure 3 is a schematic diagram of the structure of an ejector used in an improved compressed air energy storage system provided by an embodiment of this specification;

[0067] Figure 4 is a schematic diagram of an embodiment of an operation adjustment method of a compressed air energy storage system provided by an embodiment of this specification, in a scenario example;

[0068] Figure 5 is a schematic diagram of an embodiment of an operation adjustment method of a compressed air energy storage system provided by an embodiment of this specification, in a scenario example;

[0069] Figure 6 is a schematic diagram of an embodiment of an operation adjustment method of a compressed air energy storage system provided by an embodiment of this specification, in a scenario example;

[0070] Figure 7 is a schematic diagram of an embodiment of an operation adjustment method of a compressed air energy storage system provided by an embodiment of this specification, in a scenario example;

[0071] Figure 8 is a schematic diagram of the structure of a computer device provided by an embodiment of this specification;

[0072] Fig. 9 It is a schematic diagram of the structural composition of an operation regulating device of a compressed air energy storage system provided in one embodiment of the present specification. DETAILED DESCRIPTION

[0073] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this specification.

[0074] Considering that in the specific process of expansion and energy release, the pressure of the compressed gas in the gas storage equipment will continue to decrease as the operating time increases. The rated operating parameters of the expansion section system are mostly designed according to a certain operating parameter after technical and economic comparison, and the pressure of the actual gas storage reservoir is constantly changing, which will cause the expander to adapt to a wider load range and cannot continue to operate in the optimal operating range. For example, a throttling device may be set in front of the expander to change the inlet pressure, but this will lose some of the work capacity of the high-pressure gas. Or, when the gas storage is lower than the rated pressure, the output power of the expansion section system decreases, and even affects the overall stability of the operation. In addition, the operation of compressed air energy storage also needs to strictly meet the grid connection requirements of the power grid. For example, it is required to reach the rated power generation within the corresponding response time and maintain the stable operation of the power generation power within the power generation time. The above factors cause the compressed air energy storage system, especially the expansion section of the compressed air energy storage system, to often face complex and diverse operating scenarios during specific operation. However, based on the existing methods and equipment, most of them are unable to fully and effectively deal with the above-mentioned complex and diverse operating scenarios, resulting in unsatisfactory expansion power generation effects and failure to meet the grid connection requirements.

[0075] Considering the above situation, the optional adjustment methods of the compressed air energy storage system may include: inlet guide vane adjustment, throttling adjustment and air supply adjustment. These three methods can be used alone or in combination to improve the expander's adjustment ability and output performance to the pressure change of the gas storage reservoir to a certain extent. However, due to the large range of gas pressure changes in the gas storage reservoir, the long duration of the pressure decay process and the large number of types of initial operating states of the gas storage reservoir, if only one of the above three methods or a combination thereof is used, it is difficult to maximize the recovery of throttling losses, the increase in power generation time and the maintenance of gas working capacity at the end of operation in the entire power generation process. Performance improvement effects, resulting in failure to meet the grid connection requirements or short operating time, low income level, unstable operation and other problems, affecting the operating reliability, economy and adaptability of the compressed air energy storage system.

[0076] In view of the root cause of the above problems, this specification considers that the original compressed air energy storage system, especially the expansion section of the compressed air energy storage system, can be improved first, so that the compressed air energy storage system can be better adapted to a variety of different operating scenarios in terms of hardware structure. Specifically, it is considered that a main gas regulating module including a first main gas regulating branch and a second main gas regulating branch, and a supplementary gas regulating module including a first supplementary gas regulating branch and a second supplementary gas regulating branch can be added to the expansion section; wherein, the first main gas regulating branch is at least connected to the first ejector, and the first supplementary gas regulating branch is at least connected to the second ejector. In this way, it can support users to flexibly adjust the flow and pressure of the gas in the expansion section by combining the first main gas regulating branch, the second main gas regulating branch, the first supplementary gas regulating branch, and the second supplementary gas regulating branch, and the integrated regulating valve mode and ejector mode to meet the grid connection requirements of the power grid and obtain a better expansion power generation effect.

[0077] At the same time, it is also considered that the operation and regulation mode of the system can be improved based on the improved compressed air energy storage system, so that the improved compressed air energy storage system can be accurately distinguished and finely and effectively regulated for different operation scenarios, so that the relevant structural modules of the improved compressed air energy storage system, such as the air supply regulation module, the main air regulation module, etc., can be fully utilized to obtain a relatively better expansion power generation effect, so as to better meet the grid connection requirements of the power grid. Specifically, it is considered that the target grid connection parameters, target initial parameters, and target reference parameters of the compressed air energy storage system can be obtained first; according to the target grid connection parameters and the target initial parameters, the target prediction parameters of the compressed air energy storage system for expansion power generation are determined; according to the target grid connection parameters, the target initial parameters, the target reference parameters, and the target prediction parameters, the operation scenario type of expansion power generation of the compressed air energy storage system is determined; according to the operation scenario type of expansion power generation of the compressed air energy storage system, a matching target regulation rule is determined from the preset regulation rule set; according to the target regulation rule, in the process of expansion power generation of the compressed air energy storage system, the main air regulation module and / or the air supply regulation module of the expansion section are adjusted accordingly.

[0078] Based on the above considerations, see Figure 1 As shown, an embodiment of this specification provides an operation adjustment method for a compressed air energy storage system, wherein the method is specifically applied to a compressed air energy storage system.

[0079] For details, see Figure 2As shown, the compressed air energy storage system can be an improved compressed air energy storage system. The expansion section of the compressed air energy storage system can at least include: a main gas regulating module and a supplementary gas regulating module. Among them, the main gas regulating module can be arranged on the main gas pipeline between the first gas-water heat exchanger and the gas storage equipment, and the supplementary gas regulating module can be arranged on the supplementary gas pipeline between the three-stage expander and the gas storage equipment. The main gas regulating module can specifically include: a first main gas regulating branch and a second main gas regulating branch; the first main gas regulating branch is at least connected to a first ejector; the ejection fluid interface of the first ejector is at least connected to the exhaust port of the first-stage expander and the exhaust port of the second-stage expander; the supplementary gas regulating module includes: a first supplementary gas regulating branch and a second supplementary gas regulating branch; the first supplementary gas regulating branch is at least connected to a second ejector; the ejection fluid interface of the second ejector is at least connected to the exhaust port of the second-stage expander and the exhaust port of the three-stage expander; the second main gas regulating branch and the second supplementary gas regulating branch are respectively connected to corresponding regulating valves.

[0080] The specific implementation may include the following:

[0081] S101: Obtain target grid-connected parameters, target initial parameters, and target reference parameters of the compressed air energy storage system; wherein the target grid-connected parameters include: target power generation, target response time, target power generation time, and the target initial parameters include: the initial value of the total amount of gas in the gas storage equipment, and the initial value of the gas pressure in the gas storage equipment; the target reference parameters include: the pressure design value of the air inlet of the first-stage expander, the first response time based on the regulating valve mode, and the second response time based on the ejector mode;

[0082] S102: Determine target prediction parameters of the compressed air energy storage system for expansion power generation according to target grid connection parameters and target initial parameters; wherein the target prediction parameters include: a predicted value of power generation duration, and a predicted value of gas pressure in the gas storage equipment when power generation ends;

[0083] S103: Determine the operation scenario type of expansion power generation of the compressed air energy storage system according to the target grid-connected parameters, the target initial parameters, the target reference parameters, and the target prediction parameters;

[0084] S104: Determine a matching target regulation rule from a preset regulation rule set according to the operation scenario type of expansion power generation of the compressed air energy storage system;

[0085] S105: According to the target regulation rule, during the expansion and power generation process of the compressed air energy storage system, the main air regulation module and / or the supplementary air regulation module of the expansion section are adjusted accordingly.

[0086] For details, please refer to Figure 2As shown, the expansion section of the compressed air energy storage system may at least include: an expansion pipeline and a heating pipeline.

[0087] The expansion pipeline may at least include a gas storage device, a first gas-water heat exchanger (which may be simply referred to as gas-water heat exchanger 1), a first-stage expander, a second gas-water heat exchanger (which may be simply referred to as gas-water heat exchanger 2), a second-stage expander, a third gas-water heat exchanger (which may be simply referred to as gas-water heat exchanger 3), a third-stage expander, and a generator (which may be simply referred to as G) connected in sequence;

[0088] The heating pipeline at least includes a high-temperature liquid storage tank, a first heating branch, and a low-temperature liquid storage tank connected in sequence; the first heating branch is connected to a first air-water heat exchanger; the heating pipeline also includes a second heating branch and a third heating branch; the second heating branch is connected to a second air-water heat exchanger, and the third heating branch is connected to a third air-water heat exchanger; the second heating branch and the third heating branch are respectively connected in parallel with the first heating branch;

[0089] Specifically, a main gas regulating module is further connected to the main gas pipeline between the first gas-water heat exchanger and the gas storage equipment; wherein the main gas regulating module comprises: a first main gas regulating branch and a second main gas regulating branch; the first main gas regulating branch is connected to a first ejector; the ejection fluid interface of the first ejector is connected to at least the exhaust port of the first-stage expander and the exhaust port of the second-stage expander;

[0090] In addition, an air supply pipeline (or air supply pipeline, air supply branch, etc.) is connected between the first-stage expander and the gas storage equipment; the air supply pipeline is at least connected to an air supply regulating module; wherein the air supply regulating module includes: a first air supply regulating branch and a second air supply regulating branch; the first air supply regulating branch is connected to a second ejector; the ejection fluid interface of the second ejector is at least connected to the exhaust port of the third-stage expander.

[0091] The gas storage equipment stores high-pressure gas, which can be compressed by the compression section system through compression energy storage, and then stored in the gas storage equipment.

[0092] The high pressure gas may be air, carbon dioxide, or other suitable gas. The type of the high pressure gas is not limited in this specification.

[0093] The above-mentioned gas storage equipment may specifically include any one of the following: underground salt caverns, artificial chambers, steel containers, etc.

[0094] In addition, corresponding auxiliary regulating valves, for example, the fifth regulating valve and the sixth regulating valve, are respectively provided in the pipeline between the injection fluid interface of the first ejector and the exhaust port of the first-stage expansion machine, and in the pipeline between the injection fluid interface of the first ejector and the exhaust port of the second-stage expansion machine.

[0095] Corresponding auxiliary regulating valves, for example, the ninth regulating valve and the tenth regulating valve, are respectively provided in the pipeline between the injection fluid interface of the second ejector and the exhaust port of the secondary expander, and in the pipeline between the injection fluid interface of the second ejector and the exhaust port of the tertiary expander.

[0096] Furthermore, the ejection fluid interface of the first ejector can be connected to the exhaust port of the third-stage expander through a pipeline, and a seventh regulating valve can be arranged on the pipeline. The ejection fluid interface of the second ejector can be connected to the exhaust port of the first-stage expander through a pipeline, and an eighth regulating valve can be arranged on the pipeline.

[0097] For details, see Figure 2 As shown, the expansion pipeline is sequentially connected with at least gas storage equipment, a first gas-water heat exchanger, a first-stage expander, a second gas-water heat exchanger, a second-stage expander, a third gas-water heat exchanger, a third-stage expander, a generator and other equipment.

[0098] Based on the expansion pipeline, when the expansion section system is used for expansion and energy release, the high-pressure gas in the gas storage equipment will flow into the first gas-water heat exchanger through the corresponding pipeline for the first heating treatment; the heated gas will enter the first-stage expander through the air inlet of the first-stage expander to perform work, complete the first-stage expansion energy release, and then be discharged through the exhaust port of the first-stage expander.

[0099] The exhausted gas will flow into the second gas-water heat exchanger through the corresponding pipeline for a second heating treatment; the heated gas will enter the secondary expander through the air inlet of the secondary expander to perform work, complete the second stage expansion and release energy, and then be discharged through the exhaust port of the secondary expander.

[0100] The exhausted gas will flow into the third gas-water heat exchanger through the corresponding pipeline for the third heating treatment; the heated gas will enter the third-stage expander through the air inlet of the third-stage expander to perform work, complete the third-stage expansion and release energy, and then be discharged through the exhaust port of the third-stage expander.

[0101] During the above expansion and energy release process, the generator can collect and utilize the energy released by the gas in the expander to obtain the required electrical energy.

[0102] For details, see Figure 2 As shown, the first gas-water heat exchanger can be connected to the first heating branch; the second gas-water heat exchanger can be connected to the second heating branch; and the third gas-water heat exchanger can be connected to the third heating branch.

[0103] The first heating branch, the second heating branch and the third heating branch are connected in parallel and are respectively connected to the high temperature liquid storage tank and the low temperature liquid storage tank to form a heating pipeline. The high temperature liquid storage tank stores a high temperature heat storage medium. The low temperature liquid storage tank stores a low temperature heat storage medium.

[0104] The heat storage medium may specifically include one or more of the following combinations: water, heat transfer oil, molten salt, etc. In specific implementation, a suitable type of heat storage medium may also be selected according to the temperature requirements in the actual working scenario.

[0105] Based on the heating pipeline, when the expansion section system is used for expansion and energy release, the high-temperature heat storage medium in the high-temperature liquid storage tank flows into the first gas-water heat exchanger through the corresponding pipeline, and heats the gas flowing through the first gas-water heat exchanger; after heating, the low-temperature heat storage medium with a reduced temperature flows into the low-temperature liquid storage tank through the corresponding pipeline. In a similar manner, the gas flowing through the second gas-water heat exchanger and the gas flowing through the third gas-water heat exchanger can be heated by the second gas-water heat exchanger and the third gas-water heat exchanger, respectively.

[0106] See also Figure 2 As shown, a main gas regulating module is also connected between the first gas-water heat exchanger and the gas storage equipment. The main gas regulating module is included, and the pipeline between the gas storage equipment and the first-stage expander can be recorded as a main gas pipeline. The main gas regulating module is used to regulate the gas input to the air inlet of the first-stage expander through the main gas pipeline.

[0107] Specifically, the main gas regulating module may include a first main gas regulating branch and a second main gas regulating branch, wherein the first main gas regulating branch is at least connected to a first ejector.

[0108] Correspondingly, in specific implementation, the gas in the main gas pipeline can be regulated through the first main gas regulating branch and / or the second main gas regulating branch in the main gas regulating module.

[0109] A gas supply pipeline may be connected between the primary expander and the gas storage equipment. The gas supply pipeline is connected in parallel with the main gas pipeline. The gas supply pipeline is also connected to a gas supply regulating module. The gas supply regulating module is specifically used to regulate the gas input to the primary expander through the gas supply pipeline.

[0110] Specifically, the above-mentioned air supply regulating module may include a first air supply regulating branch and a second air supply regulating branch. The first air supply regulating branch is at least connected to the second ejector.

[0111] Correspondingly, in specific implementation, the gas in the gas supply pipeline can be regulated through the first gas supply regulating branch and / or the second gas supply regulating branch in the gas supply regulating module.

[0112] The first ejector and the second ejector may be a gas ejector. Figure 3 The gas ejector at least comprises: a suction section, a mixing section, and a diffuser section.

[0113] The suction section at least comprises a working nozzle, and the suction section is also provided with a working fluid interface and an ejection fluid interface. The diffuser section is also provided with a mixed fluid outlet.

[0114] In specific implementation, for the first ejector, the working fluid interface can be connected to the gas storage equipment through a pipeline, the mixed fluid outlet can be connected to the air inlet of the first-stage expansion machine through a pipeline after passing through the first gas-water heat exchanger, and the ejection fluid interface can be connected to at least the exhaust port of the first-stage expansion machine and the exhaust port of the second-stage expansion machine.

[0115] Based on the above-mentioned first ejector, while high-pressure gas from the gas storage equipment is connected as the working fluid through the working fluid interface, the gas with relatively low pressure after expansion and work output from the exhaust port of the first-stage expander and / or the second-stage expander can be connected through the ejection fluid interface as the ejection fluid. Then, the entrainment effect of the high-pressure gas (i.e., the working fluid) in the gas ejector on the low-pressure gas (i.e., the ejection fluid) can be utilized to achieve throttling and pressure reduction of the high-pressure gas inside the ejector, and at the same time, it can also effectively entrain part of the low-pressure gas, and realize that part of the throttling loss of the main gas flow is converted into the work capacity of the entrained gas flow, and the flow rate of the mixed fluid finally output by the gas ejector and acting on the first-stage expander is increased, which helps to improve the gas flow rate and work capacity of the gas connected to the gas inlet of the first-stage expander, thereby improving the expansion and discharge effect of the first-stage expander.

[0116] In this way, by using the above-mentioned first ejector, while using the main gas regulating module to perform regulating treatments such as gas replenishment and throttling, the residual energy of the expander exhaust can be effectively recovered and utilized to finely adjust the gas pressure of the main gas flow output by the main gas regulating module and acting on the first-stage expander. On the one hand, the speed of pressure drop in the gas storage reservoir is alleviated, and on the other hand, the gas pressure parameters of the main gas flow participating in the expansion energy release can be stably maintained at the required operating parameters, which helps to keep the expansion section system able to operate continuously and stably; at the same time, due to the introduction and reuse of the gas discharged by the expander, the gas flow rate of the main gas flow participating in the expansion work input to the first-stage expander is increased, so that a better expansion discharge effect can be obtained.

[0117] Similarly, for the second ejector, the working fluid interface can be connected to the gas storage equipment through a pipeline, the mixed fluid outlet can be connected to the first-stage expander through a pipeline, and the ejection fluid interface can be connected to at least the exhaust port of the second-stage expander and the exhaust port of the third-stage expander.

[0118] In this way, the above-mentioned second ejector can be used to input the supplementary air flow to the first-stage expansion machine and assist the main gas regulating module in the supplementary air processing, while effectively recovering and utilizing the residual energy of the expander exhaust gas, so as to finely adjust the gas pressure output by the supplementary air regulating module and acting on the first-stage expansion machine to achieve the corresponding operating parameters; at the same time, the gas flow rate of the supplementary air flow input to the first-stage expansion machine to participate in the expansion energy release is further increased, so that a relatively better expansion discharge effect can be obtained.

[0119] For details, see Figure 2 As shown, the first main gas regulating branch is connected to the first regulating valve, the second main gas regulating branch is connected to the second regulating valve, the first supplementary gas regulating branch is connected to the third regulating valve, the second supplementary gas regulating branch is connected to the fourth regulating valve, a first switch valve is also arranged on the main gas pipeline between the gas storage equipment and the main gas regulating module, and a second switch valve is also arranged on the supplementary gas pipeline between the gas storage equipment and the supplementary gas regulating module.

[0120] Correspondingly, the first regulating valve, the second regulating valve, the third regulating valve, and the fourth regulating valve can be used to more precisely control the on-off and opening of the corresponding branch. The first switch valve and the second switch valve can be used to effectively control the on-off of the main gas pipeline and the supplementary gas pipeline.

[0121] For details, see Figure 2 As shown, a fourth gas-water heat exchanger (which can be simply referred to as gas-water heat exchanger 4) can be specifically connected between the gas replenishment regulation module and the first-stage expander; wherein the fourth gas-water heat exchanger is connected to the high-temperature liquid storage tank and the low-temperature liquid storage tank through a fourth heating branch.

[0122] In specific implementation, the gas output by the gas replenishment regulation module can be first heated by the fourth gas-water heat exchanger and then input into the first-stage expander to assist the gas output through the main gas pipeline and participate in the expansion energy release based on the first-stage expander.

[0123] Specifically, considering that the air pressure of the supplementary air flow output by the supplementary air regulation module is often relatively lower than the air pressure of the main air flow output by the main air regulation module; and the main air regulation module is connected to the air inlet of the first-stage impeller of the first-stage expansion machine after the first air-water heat exchanger; the main air flow output by the main air regulation module will pass through the air inlet of the first-stage impeller into the first-stage expansion machine to perform work.

[0124] In this case, if the air supply regulating module is directly connected to the air inlet of the first-stage impeller of the first-stage expander through the fourth air-water heat exchanger, the air supply flow with a lower air pressure output by the air supply regulating module will be directly mixed with the main air flow. Direct mixing of airflows of different pressures will produce airflow fluctuations, which may easily lead to safety accidents; on the other hand, direct mixing will cause partial potential energy loss of the high-pressure airflow, reducing the overall work capacity.

[0125] Considering that after the main airflow enters the first-stage expander and starts to do work, the potential energy of the main airflow will be continuously converted into corresponding electrical energy through expansion work, resulting in a decrease in the potential energy of the main airflow and a decrease in the air pressure of the main airflow.

[0126] Therefore, the air supply regulating module can be connected to the air inlet of the middle-stage impeller of the first-stage expander through the fourth air-water heat exchanger.

[0127] Based on the above structure, the main airflow encountered by the supplementary airflow output by the supplementary air flow adjustment module after entering the first-stage expander through the air inlet of the intermediate-stage impeller is an airflow with a pressure that is the same or similar to the air pressure of the supplementary airflow after a period of work. In this way, on the one hand, the gas potential energy can be effectively utilized to generate more electrical energy, reduce the waste of potential energy, and obtain a better expansion energy release effect; on the other hand, it can also avoid safety hazards and ensure that the expansion section system can operate safely and stably.

[0128] For details, see Figure 2 As shown, a third switch valve may be connected between the first gas-water heat exchanger and the high-temperature liquid storage tank; and a fourth switch valve may be connected between the first gas-water heat exchanger and the low-temperature liquid storage tank.

[0129] Similarly, a fifth switch valve may be connected between the second gas-water heat exchanger and the high-temperature liquid storage tank; and a sixth switch valve may be connected between the second gas-water heat exchanger and the low-temperature liquid storage tank.

[0130] A seventh switch valve may be connected between the third gas-water heat exchanger and the high-temperature liquid storage tank; and an eighth switch valve may be connected between the third gas-water heat exchanger and the low-temperature liquid storage tank.

[0131] A ninth switch valve may be connected between the fourth gas-water heat exchanger and the high-temperature liquid storage tank; and a tenth switch valve may be connected between the fourth gas-water heat exchanger and the low-temperature liquid storage tank.

[0132] Based on the above-mentioned switch valve, the corresponding heating branch can be controlled more effectively, so as to heat the input airflow of the relevant expander more accurately.

[0133] Specifically, the above-mentioned target grid-connected parameters can be understood as index parameters that meet the grid-connected requirements, and may include: target power generation (which can be abbreviated as P1), target power generation time (which can be abbreviated as t e1 ), target response time (can be abbreviated as t r1 ).

[0134] Among them, the above-mentioned target power generation can be specifically understood as the rated power generation of the compressed air energy storage system for expansion power generation required when the grid is connected. The above-mentioned target power generation duration can be specifically understood as the rated power generation duration of the compressed air energy storage system for expansion power generation required when the grid is connected. The above-mentioned target response time can be specifically understood as the time required for the compressed air energy storage system to reach the rated power generation from startup when the grid is connected.

[0135] Usually, the actual power generation of the compressed air energy storage system must be equal to the target power generation, the actual power generation time must be greater than or equal to the target power generation time, and the actual response time must be less than or equal to the target response time in order to meet the grid connection requirements.

[0136] Specifically, the above target grid-connected parameters can be extracted from the grid-connected rule file of the power grid.

[0137] Specifically, the above-mentioned target initial parameters can be understood as the compressed air energy storage system. Before starting the expansion power generation, the current relevant parameters may include: the initial value of the total amount of gas in the gas storage equipment (which can be abbreviated as m), the initial value of the gas pressure in the gas storage equipment (which can be abbreviated as p st,begin ).

[0138] Specifically, the above-mentioned gas storage equipment may also be provided with corresponding gravity sensors and air pressure sensors.

[0139] Correspondingly, during specific implementation, the gravity sensor can be used to detect and obtain the initial value of the total amount of gas in the gas storage equipment; at the same time, the air pressure sensor can be used to detect and obtain the initial value of the gas pressure in the gas storage equipment.

[0140] The above target reference parameters may include: the pressure design value of the air inlet of the first-stage expander (which can be abbreviated as p e,in ), the first response time based on the regulating valve mode (can be abbreviated as t r21 ), the second response time based on the ejector mode (can be abbreviated as t r22 ).

[0141] The pressure design value of the air inlet of the first-stage expander may specifically be a pushing value of the input gas pressure determined based on factors such as the structure, performance, and work done by the first-stage expander.

[0142] The first response time based on the regulating valve mode (or pure regulating valve mode) can be specifically understood as the time it takes for the compressed air energy storage system to start and reach the target power generation power by solely relying on controlling the regulating valve of the second main gas regulating branch.

[0143] The above-mentioned second response time based on the ejector mode (or pure ejector mode) can be specifically understood as the time it takes for the compressed air energy storage system to start and reach the target power generation power by solely relying on controlling the ejector of the first main air regulating branch.

[0144] In specific implementation, the pressure design value of the air inlet of the first-stage expander can be determined according to the equipment parameters of the first-stage expander; the first response time and the second response time can be determined through simulation tests in combination with the initial operation parameters of the compressed air energy storage system and the system parameters of the compressed air energy storage system. The second response time is usually longer than the first response time.

[0145] The above target prediction parameters can be specifically understood as the predicted values ​​of relevant parameters when the compressed air energy storage system is operated according to the current target initial parameters, target reference parameters and target grid-connected parameters, which can include: the predicted value of power generation time (which can be abbreviated as t e2 ), the predicted value of the gas pressure in the gas storage equipment when power generation ends (which can be simply referred to as p st,end ).

[0146] During specific implementation, the target prediction parameters of the compressed air energy storage system regarding expansion power generation can be determined based on the target grid-connected parameters and the target initial parameters.

[0147] Specifically, for example, according to the corresponding physical calculation formula, the target initial parameters, target reference parameters, and target grid-connected parameters can be used to calculate the corresponding power generation time and gas pressure, which can be used as the predicted value of the power generation time and the predicted value of the gas pressure in the gas storage equipment when the power generation ends to obtain the target prediction parameters.

[0148] Specifically, for example, the historical operation data of the compressed air energy storage system can be collected in advance and used as sample data to train an initial model based on a neural network to obtain a corresponding operation prediction model. The operation prediction model is then used to process the target initial parameters, target reference parameters, and target grid-connected parameters to obtain and output the corresponding prediction results; based on the prediction results, the corresponding target prediction parameters are determined.

[0149] During specific implementation, the operating scenario type of the compressed air energy storage system when performing grid-based expansion and power generation can be determined according to the target power generation power, target power generation time, target response time in the target grid-connected parameters, the initial value of the gas pressure in the gas storage equipment in the target initial parameters, the pressure design value of the air inlet of the first-stage expander in the target reference parameters, the first response time based on the regulating valve mode, the second response time based on the ejector mode, and the predicted value of the power generation time in the target prediction parameters, and the predicted value of the gas pressure in the gas storage equipment when power generation ends; then different operating scenario types are distinguished, and the target regulation rules that match the corresponding operating scenario type are determined from the preset regulation rule set; and then, according to the target regulation rules, during the expansion and power generation of the compressed air energy storage system, the main gas regulation module and / or the supplementary gas regulation module of the expansion section can be targetedly regulated and controlled to better adapt to the corresponding operating scenarios, and the expansion and power generation can be continuously and stably performed according to the target power generation to meet the grid connection requirements.

[0150] Specifically, the preset adjustment rule set includes a plurality of preset adjustment rules, wherein each preset adjustment rule corresponds to at least one operation scenario type.

[0151] Before specific implementation, historical regulation and control records of the compressed air energy storage system can be collected; wherein, the historical regulation and control records also include corresponding operating scenario information; the historical regulation and control records are clustered to obtain multiple data groups; wherein each data group has at least one operating scenario type, and each data group at least includes common operating scenario information and common regulation and control operations; for each data group, the corresponding operating scenario type and the corresponding scenario feature judgment condition are determined based on the common operating scenario information contained in the data group; at the same time, an initial regulation rule is constructed based on the common regulation and control operations contained in the data group; in addition, expert experience can be introduced to correct the initial regulation rule; finally, the scenario feature judgment conditions and regulation rules corresponding to the same data group are combined to obtain a preset regulation rule corresponding to at least one operating scenario type; multiple preset regulation rules are combined to construct a preset regulation rule set.

[0152] In specific implementation, the operating scenario type of expansion power generation of the compressed air energy storage system can be determined first; then the preset adjustment rule set is queried to determine the preset adjustment rule that matches the operating scenario type as the target adjustment rule; then during the expansion power generation process, the main gas adjustment module and / or the supplementary gas adjustment module in the improved compressed air energy storage system are adjusted in a targeted manner according to the target adjustment rule.

[0153] Therefore, it is possible to finely distinguish different types of expansion power generation operation scenarios, and to finely and specifically adjust and control the compressed air energy storage system for different types of expansion power generation operation scenarios, thereby effectively recycling the residual energy of the expander exhaust, finely adjusting the operating parameters such as gas pressure in the expansion section system, and effectively increasing the expander intake flow rate, so that the compressed air energy storage system can operate continuously and stably for a long time according to the operating conditions, obtain better expansion power generation effects, and thus better meet the grid connection requirements. In addition, it can also achieve the effect of saving gas consumption and improving resource utilization.

[0154] In some embodiments, during specific implementation, the operating scenarios of the expansion power generation of the compressed air energy storage system can be divided into 10 different operating scenario types according to the target grid-connected parameters, the target initial parameters, the target reference parameters, and the target prediction parameters, which can specifically include: the first scenario type, the second scenario type, the third scenario type, the fourth scenario type, the fifth scenario type, the sixth scenario type, the seventh scenario type, the eighth scenario type, the ninth scenario type, and the tenth scenario type.

[0155] Among them, the scene feature judgment conditions of the above-mentioned first scene type can be specifically: the initial value of the gas pressure in the gas storage equipment is greater than the pressure design value of the air inlet of the first-stage expander, the predicted value of the gas pressure in the gas storage equipment when power generation ends is greater than the pressure design value of the air inlet of the first-stage expander, the predicted value of the power generation time is greater than the target power generation time, and the target response time is greater than the first response time and less than the second response time (that is, P st,begin >P e,in , P st,end >P e,in ;t e1 <t e2 ;t r21 <t r1 <t r22 ); Specifically, it can mean: based on the compressed air energy storage equipment, in accordance with the grid connection requirements, when performing complete expansion power generation, the total amount of gas and gas pressure in the gas storage equipment are sufficient, and the ejector mode based on the first ejector is not supported. For this scenario type, when specifically adjusting and controlling, only the main gas adjustment can be performed throughout the process.

[0156] The scene feature judgment conditions of the second scene type may specifically be: the initial value of the gas pressure in the gas storage equipment is greater than the pressure design value of the gas inlet of the first-stage expander, the predicted value of the gas pressure in the gas storage equipment at the end of power generation is greater than the pressure design value of the gas inlet of the first-stage expander, the predicted value of the power generation time is greater than the target power generation time, and the target response time is greater than the second response time (i.e., P st,begin >P e,in , P st,end >Pe,in ;t e1 <t e2 ;t r1 >t r22 ); specifically, it can mean: based on the compressed air energy storage equipment, in accordance with the grid connection requirements, when performing complete expansion power generation, the total amount of gas and gas pressure in the gas storage equipment are sufficient, and the ejector mode based on the first ejector is supported. For this scenario type, only the main gas regulation can be performed throughout the process.

[0157] The scene feature judgment conditions of the third scene type may specifically be: the initial value of the gas pressure in the gas storage equipment is greater than the pressure design value of the gas inlet of the first-stage expander; the predicted value of the gas pressure in the gas storage equipment at the end of power generation is less than or equal to the pressure design value of the gas inlet of the first-stage expander; the predicted value of the power generation time is greater than the target power generation time; the target response time is greater than the first response time and less than the second response time (i.e., P st,begin >P e,in , P st,end ≤P e,in ;t e1 <t e2 ;t r21 <t r1 <t r22 ); specifically, it can mean: based on the compressed air energy storage device, in accordance with the grid connection requirements, when performing complete expansion power generation, the total amount of gas in the gas storage equipment is sufficient, but the gas pressure is insufficient, and the ejector mode based on the first ejector is not supported. For this scenario type, when adjusting and controlling specifically, the main gas and supplementary gas can be adjusted in stages throughout the whole process; among them, when adjusting the supplementary gas, the adjustment based on the second ejector can be introduced according to the situation.

[0158] The scene feature judgment conditions of the fourth scene type may specifically be: the initial value of the gas pressure in the gas storage equipment is less than or equal to the pressure design value of the gas inlet of the first-stage expander; the predicted value of the gas pressure in the gas storage equipment at the end of power generation is less than or equal to the pressure design value of the gas inlet of the first-stage expander; the predicted value of the power generation duration is greater than the target power generation duration; the target response duration is greater than the second response duration (i.e., P st,begin ≤P e,in , P st,end ≤P e,in ;t e1 <t e2 ;t r1 >t r22); specifically, it can mean: based on the compressed air energy storage equipment, in view of the grid connection requirements, when performing complete expansion power generation, the total amount of gas in the gas storage equipment is sufficient, but the gas pressure is seriously insufficient, and the ejector mode based on the first ejector is supported. For this type of scenario, when adjusting and controlling specifically, the main gas and supplementary gas can be adjusted in stages throughout the whole process; among them, when adjusting the main gas, the adjustment based on the first ejector can be introduced according to the situation, and when adjusting the supplementary gas, the adjustment based on the second ejector can be introduced according to the situation.

[0159] The scene feature judgment conditions of the fifth scene type may specifically be: the initial value of the gas pressure in the gas storage equipment is greater than the pressure design value of the gas inlet of the first-stage expander; the predicted value of the gas pressure in the gas storage equipment at the end of power generation is less than or equal to the pressure design value of the gas inlet of the first-stage expander; the predicted value of the power generation time is greater than the target power generation time; the target response time is greater than the second response time (i.e., P st,begin >P e,in , P st,end ≤P e,in ;t e1 <t e2 ;t r1 >t r22 ); specifically, it can mean: based on the compressed air energy storage device, in view of the grid connection requirements, when performing complete expansion power generation, the total amount of gas in the gas storage equipment is sufficient, but the gas pressure is insufficient, and the ejector mode based on the first ejector is supported. For this scenario type, when adjusting and controlling specifically, the main gas and supplementary gas can be adjusted in stages throughout the whole process; among them, when adjusting the main gas, the adjustment based on the first ejector can be introduced according to the situation, and when adjusting the supplementary gas, the adjustment based on the second ejector can be introduced according to the situation.

[0160] The scene feature judgment conditions of the sixth scene type may specifically be: the initial value of the gas pressure in the gas storage equipment is greater than the pressure design value of the gas inlet of the first-stage expander, the predicted value of the gas pressure in the gas storage equipment at the end of power generation is less than or equal to the pressure design value of the gas inlet of the first-stage expander, the predicted value of the power generation time is less than the target power generation time, and the target response time is greater than the first response time and less than the second response time (i.e., P st,begin >P e,in , P st,end ≤P e,in ;t e1 >t e2 ;t r21 <t r1 <t r22); specifically, it can mean: based on the compressed air energy storage device, in accordance with the grid connection requirements, when performing complete expansion power generation, the total amount of gas in the gas storage equipment is insufficient, the gas pressure is insufficient, and the ejector mode based on the first ejector is not supported. For this scenario type, when adjusting and controlling specifically, the main gas and supplementary gas can be adjusted in stages throughout the whole process; among them, when adjusting the supplementary gas, the adjustment based on the second ejector can be introduced according to the situation.

[0161] The scene feature judgment conditions of the seventh scene type may specifically be: the initial value of the gas pressure in the gas storage equipment is greater than the pressure design value of the gas inlet of the first-stage expander; the predicted value of the gas pressure in the gas storage equipment at the end of power generation is less than or equal to the pressure design value of the gas inlet of the first-stage expander; the predicted value of the power generation time is less than the target power generation time; the target response time is greater than the second response time (i.e., P st,begin >P e,in , P st,end ≤P e,in ;t e1 >t e2 ;t r1 >t r22 ); specifically, it can mean: based on the compressed air energy storage equipment, in view of the grid connection requirements, when performing complete expansion power generation, the total amount of gas in the gas storage equipment is insufficient, the gas pressure is insufficient, and the ejector mode based on the first ejector is supported. For this scenario type, when adjusting and controlling specifically, the main gas and supplementary gas can be adjusted in stages throughout the whole process; among them, when adjusting the main gas, the adjustment based on the first ejector can be introduced according to the situation, and when adjusting the supplementary gas, the adjustment based on the second ejector can be introduced according to the situation.

[0162] The scene feature judgment conditions of the eighth scene type may specifically be: the initial value of the gas pressure in the gas storage equipment is less than or equal to the pressure design value of the air inlet of the first-stage expander; the predicted value of the gas pressure in the gas storage equipment at the end of power generation is less than or equal to the pressure design value of the air inlet of the first-stage expander; the predicted value of the power generation time is greater than the target power generation time; the target response time is greater than the first response time and less than the second response time (i.e., P st,begin ≤P e,in , P st,end ≤P e,in ;t e1 <t e2 ;t r21 <t r1 <t r22); specifically, it can mean: based on the compressed air energy storage device, in accordance with the grid connection requirements, when performing complete expansion power generation, the total amount of gas in the gas storage equipment is sufficient, but the gas pressure is seriously insufficient, and the ejector mode based on the first ejector is not supported. For this scenario type, when adjusting and controlling specifically, the main gas and supplementary gas can be adjusted in stages throughout the whole process; among them, when adjusting the supplementary gas, the adjustment based on the second ejector can be introduced according to the situation.

[0163] The scene feature judgment conditions of the ninth scene type may specifically be: the initial value of the gas pressure in the gas storage equipment is less than or equal to the pressure design value of the air inlet of the first-stage expander; the predicted value of the gas pressure in the gas storage equipment at the end of power generation is less than or equal to the pressure design value of the air inlet of the first-stage expander; the predicted value of the power generation time is less than the target power generation time; the target response time is greater than the first response time and less than the second response time (i.e., P st,begin ≤P e,in , P st,end ≤P e,in ;t e1 >t e2 ;t r21 <t r1 <t r22 ); specifically, it can mean: based on the compressed air energy storage device, in accordance with the grid connection requirements, when performing complete expansion power generation, the total amount of gas in the gas storage equipment is insufficient, the gas pressure is seriously insufficient, and the ejector mode based on the first ejector is not supported. For this scenario type, when adjusting and controlling specifically, the main gas and supplementary gas can be adjusted in stages throughout the whole process; among them, when adjusting the supplementary gas, the adjustment based on the second ejector can be introduced according to the situation.

[0164] The scene feature judgment conditions of the tenth scene type may specifically be: the initial value of the gas pressure in the gas storage equipment is less than or equal to the pressure design value of the air inlet of the first-stage expander; the predicted value of the gas pressure in the gas storage equipment at the end of power generation is less than or equal to the pressure design value of the air inlet of the first-stage expander; the predicted value of the power generation time is less than the target power generation time; the target response time is greater than the second response time (i.e., P st,begin ≤P e,in , P st,end ≤P e,in ;t e1 >t e2 ;t r1 >t r22); specifically, it can mean: based on the compressed air energy storage equipment, in view of the grid connection requirements, when performing complete expansion power generation, the total amount of gas in the gas storage equipment is insufficient, and the gas pressure is seriously insufficient, and the ejector mode based on the first ejector is supported. For this scenario type, when adjusting and controlling specifically, the main gas and the supplementary gas can be adjusted in stages throughout the whole process; among them, when adjusting the main gas, the adjustment based on the first ejector can be introduced according to the situation, and when adjusting the supplementary gas, the adjustment based on the second ejector can be introduced according to the situation.

[0165] Based on the above embodiment, the scenario feature judgment conditions can be used to finely divide the operation scenarios of the expansion power generation of the compressed air energy storage system into 10 different scenario types based on multiple different dimensions at the same time, so that the compressed air energy storage system can be accurately and targetedly adjusted and controlled by using matching adjustment rules for different scenario types, so as to better adapt to diverse and complex working conditions.

[0166] In some embodiments, see Figure 2 As shown, the first main gas regulating branch may be specifically connected to a first regulating valve, the second main gas regulating branch may be specifically connected to a second regulating valve, the first supplementary gas regulating branch may be specifically connected to a third regulating valve, the second supplementary gas regulating branch may be specifically connected to a fourth regulating valve, a first switch valve is further provided on the main gas pipeline between the gas storage equipment and the main gas regulating module, and a second switch valve is further provided on the supplementary gas pipeline between the gas storage equipment and the supplementary gas regulating module; when the method is specifically implemented, it may also include:

[0167] When the initial value of the gas pressure in the gas storage equipment is greater than the pressure design value of the air inlet of the first-stage expander, the predicted value of the gas pressure in the gas storage equipment at the end of power generation is greater than the pressure design value of the air inlet of the first-stage expander, the predicted value of the power generation time is greater than the target power generation time, and the target response time is greater than the first response time and less than the second response time, it is determined that the operation scenario type of the expansion power generation of the compressed air energy storage system is the first scenario type;

[0168] Accordingly, see Figure 4 As shown, according to the target regulation rule, in the process of expansion and power generation of the compressed air energy storage system, the main air regulation module and / or the supplementary air regulation module of the expansion section are regulated accordingly, which may specifically include:

[0169] S1: Control the first switch valve to open and the second switch valve to close;

[0170] S2: adjusting the opening of the first regulating valve to 0, and adjusting the opening of the second regulating valve to a matching first initial opening, so as to deliver gas to the first-stage expander through the second main gas regulating branch;

[0171] S3: During the expansion power generation process, the opening of the second regulating valve is dynamically adjusted according to the gas pressure in the gas storage equipment so that the gas pressure at the air inlet of the first-stage expander meets the preset working condition requirements.

[0172] The adjustment range of the opening of the second regulating valve is greater than 0 and less than or equal to 100%.

[0173] Based on the above embodiments, for the first scenario type, by utilizing the second main gas regulation branch of the main gas regulation module based solely on the regulating valve mode, the compressed air energy storage system can operate continuously and stably for a long time according to the operating conditions, obtain better expansion power generation effects, and meet the grid connection requirements.

[0174] Specifically, a pressure sensor may be provided in the gas storage device. In specific implementation, the pressure sensor may be used to detect the real-time pressure of the gas in the gas storage device; and the opening of the second regulating valve may be dynamically adjusted timely and accurately according to the detected real-time pressure of the gas.

[0175] For example, when a decrease in gas pressure is detected by the air pressure sensor, the magnitude of the decrease in air pressure can be further determined; then, based on the magnitude of the decrease in air pressure, the corresponding change magnitude of the second regulating valve can be calculated; then, according to the change magnitude, the opening of the second regulating valve can be correspondingly increased, so that the gas pressure entering the first-stage expander through the main gas regulating module is greater than or equal to the pressure design value of the air inlet of the first-stage expander; and the gas pressure of the transported gas in the system is maintained relatively stable without drastic fluctuations, thereby ensuring that the overall system can operate safely and stably.

[0176] Specifically, in the operating scenario of the first scenario type, by only opening the first switch valve and closing the second switch valve, only the main gas regulation module can be started and utilized to meet the grid connection requirements and obtain a better expansion power generation effect; without the need to start and utilize the supplementary gas regulation module separately, thereby effectively avoiding unnecessary waste of resources and improving overall resource utilization.

[0177] Specifically, in the operating scenario of the first scenario type, by adjusting the opening of the first regulating valve to 0, the first main gas regulating branch can be disconnected, and only the second main gas regulating branch is used to adjust the operation of the system based on the regulating valve mode, thereby avoiding the actual response time being too long, resulting in the response time not meeting the grid connection requirements.

[0178] In some embodiments, the method may further include:

[0179] When the initial value of the gas pressure in the gas storage equipment is greater than the pressure design value of the air inlet of the first-stage expander, the predicted value of the gas pressure in the gas storage equipment at the end of power generation is greater than the pressure design value of the air inlet of the first-stage expander, the predicted value of the power generation time is greater than the target power generation time, and the target response time is greater than the second response time, it is determined that the operation scenario type of the expansion power generation of the compressed air energy storage system is the second scenario type;

[0180] Accordingly, see Figure 5 As shown, according to the target regulation rule, in the process of expansion and power generation of the compressed air energy storage system, the main gas regulation module and / or the supplementary gas regulation module of the expansion section are adjusted accordingly. When implemented specifically, it may include:

[0181] S1: Control the first switch valve to open and the second switch valve to close;

[0182] S2: adjusting the opening of the second regulating valve to 0, and adjusting the opening of the first regulating valve to a matching second initial opening;

[0183] S3: connecting at least one of the pipeline between the ejection fluid interface of the first ejector and the exhaust port of the first-stage expander and the pipeline between the ejection fluid interface of the first ejector and the exhaust port of the second-stage expander, so as to introduce the exhaust gas of the first-stage expander and / or the exhaust gas of the second-stage expander as the ejection fluid to regulate the gas delivered by the first main gas regulating branch to the first-stage expander;

[0184] S4: During the expansion power generation process, the opening of the first regulating valve is dynamically adjusted according to the gas pressure in the gas storage equipment so that the gas pressure at the air inlet of the first-stage expander meets the preset working condition requirements.

[0185] The adjustment range of the opening of the first regulating valve is greater than 0 and less than or equal to 100%.

[0186] Based on the above embodiments, for the second scenario type, by utilizing the first main gas regulation branch of the main gas regulation module based solely on the ejector mode, the compressed air energy storage system can operate continuously and stably for a long time according to the operating conditions, obtain better expansion power generation effects, and meet the grid connection requirements.

[0187] Specifically, in the operating scenario of the second scenario type, since the target response time is greater than the second response time, the first main gas regulating branch can be turned on and utilized based on the ejector mode to make full use of the characteristics of the ejector to adjust the operation of the system accordingly. In this way, while ensuring that the grid connection requirements are met and better expansion and discharge effects are obtained, the residual energy of the expander exhaust can be effectively recovered and utilized, and the operating parameters of the expansion section system can be finely adjusted. At the same time, the expander intake flow rate can be increased, reducing the waste of resources such as gas in gas storage equipment, thereby improving the overall resource utilization rate.

[0188] Specifically, it is preferred to connect the pipeline between the injection fluid interface of the first ejector and the exhaust port of the secondary expander to use the exhaust gas of the secondary expander as the injection fluid, so that it can be better mixed with the working fluid input through the main gas pipeline, and can take into account the requirements of both low-pressure exhaust energy recovery and ensuring the working capacity of high-pressure gas, thereby obtaining a better ejector regulation effect.

[0189] Specifically, during the expansion power generation process, the opening of the first regulating valve can be adjusted dynamically according to the gas pressure in the gas storage equipment to change the amount of working fluid input through the main gas pipeline, thereby adjusting the first ejector so that the operation of the compressed air energy storage system can meet the operating conditions.

[0190] In some embodiments, see Figure 2 As shown, the pipeline between the ejection fluid interface of the first ejector and the exhaust port of the first-stage expander, and the pipeline between the ejection fluid interface of the first ejector and the exhaust port of the second-stage expander are respectively provided with corresponding auxiliary regulating valves. For example, the pipeline between the ejection fluid interface of the first ejector and the exhaust port of the first-stage expander can be provided with a fifth regulating valve as an auxiliary regulating valve; the pipeline between the ejection fluid interface of the first ejector and the exhaust port of the second-stage expander can be provided with a sixth regulating valve as an auxiliary regulating valve.

[0191] Accordingly, when the method is implemented specifically, it may further include:

[0192] During the expansion power generation process, the opening of the first regulating valve and / or the opening of the corresponding auxiliary regulating valve is dynamically adjusted according to the gas pressure in the gas storage equipment so that the gas pressure at the air inlet of the first-stage expander meets the preset operating conditions.

[0193] Based on the above embodiments, in the operating scenario of the second scenario type, by dynamically adjusting the opening of the first regulating valve and / or the opening of the corresponding auxiliary regulating valve and adjusting the injection fluid and the working fluid of the first ejector at the same time, the main gas regulating module can be adjusted more finely to obtain a relatively better expansion power generation effect.

[0194] In some embodiments, further, a buffer container may be provided at the intersection of the first main gas regulating branch and the second main gas regulating branch near the first-stage expander; wherein the buffer container is connected to the air inlet of the first-stage expander through a pipeline through the first gas-water heat exchanger;

[0195] Accordingly, when the method is implemented specifically, it may also include the following contents:

[0196] During the expansion power generation process, the opening of the first regulating valve and the opening of the second regulating valve are jointly adjusted according to the gas pressure in the gas storage equipment, so as to respectively deliver the corresponding gas to the buffer container through the first main gas regulating branch and the second main gas regulating branch; and the buffer container is used to buffer and mix the gas so that the gas pressure at the air inlet of the first-stage expander meets the preset operating conditions.

[0197] The buffer container may specifically be a buffer tank.

[0198] Specifically, when the pressure and flow rate of the gas input into the main gas pipeline are relatively higher, the first main gas regulating branch and the second main gas regulating branch can be simultaneously connected by adjusting the first regulating valve and the second regulating valve; then the first main gas regulating branch and the second main gas regulating branch can be used in combination, and based on the ejector mode and the regulating valve mode, the gases from the two branches and at different pressures are first transported to the buffer container for buffering and mixing, so as to obtain a relatively stable mixed gas with a relatively large flow rate and a pressure that meets the requirements; the above-mentioned mixed gas is then heated by the first gas-water heat exchanger and then input into the air inlet of the first-stage expander, so as to meet relatively more complex working conditions and obtain a relatively better expansion and power generation effect.

[0199] In some embodiments, the method may further include the following when implemented:

[0200] When the initial value of the gas pressure in the gas storage equipment is greater than the pressure design value of the air inlet of the first-stage expander, the predicted value of the gas pressure in the gas storage equipment when power generation ends is less than or equal to the pressure design value of the air inlet of the first-stage expander, the predicted value of the power generation time is greater than the target power generation time, and the target response time is greater than the first response time and less than the second response time, it is determined that the operation scenario type of the expansion power generation of the compressed air energy storage system is the third scenario type;

[0201] Accordingly, see Figure 6 As shown, according to the target regulation rule, in the process of expansion and power generation of the compressed air energy storage system, the main gas regulation module and / or the supplementary gas regulation module of the expansion section are adjusted accordingly. When implemented specifically, it may include:

[0202] S1: Control the first switch valve to open and the second switch valve to close;

[0203] S2: adjusting the opening of the first regulating valve to 0, and adjusting the opening of the second regulating valve to a matching third initial opening, so as to deliver gas to the first-stage expander through the second main gas regulating branch;

[0204] S3: During the expansion power generation process, dynamically adjust the opening of the second regulating valve according to the gas pressure in the gas storage equipment so that the gas pressure at the air inlet of the first-stage expander meets the preset working condition requirements;

[0205] S4: When the detected gas pressure in the gas storage equipment is less than or equal to the pressure design value of the gas inlet of the first-stage expander, the second switch valve is controlled to open;

[0206] S5: adjusting the opening of the third regulating valve to 0, and adjusting the opening of the fourth regulating valve to a matching opening, so as to deliver gas to the first-stage expander through the second gas replenishment regulating branch for gas replenishment regulation;

[0207] S6: During the expansion power generation process, the opening of the second regulating valve and the opening of the fourth regulating valve are jointly adjusted according to the gas pressure in the gas storage equipment so that the gas pressure at the air inlet of the first-stage expander meets the preset working condition requirements.

[0208] Specifically, when the detected gas pressure in the gas storage equipment is less than or equal to the pressure design value of the air inlet of the first-stage expansion machine, the second switch valve can be controlled to open and the opening of the fourth regulating valve can be adjusted to introduce and utilize the second air supply regulating branch of the air supply regulating module to input gas to the first-stage expansion machine through the air supply pipeline based on the mode of the regulating valve to perform air supply regulation, so that the pressure of the total gas input to the first-stage expansion machine can meet the operating conditions, thereby ensuring that the compressed air energy storage system can operate stably in accordance with the grid connection requirements.

[0209] Based on the above embodiment, for the third scenario type, according to whether the gas pressure in the gas storage equipment is greater than the pressure design value of the air inlet of the first-stage expander, the expansion and power generation process of the first-stage expander is divided into two stages, namely, the first stage (the gas pressure of the gas storage equipment is greater than the pressure design value of the air inlet of the first-stage expander) and the second stage (the gas pressure of the gas storage equipment is less than or equal to the pressure design value of the air inlet of the first-stage expander); and differentiated regulation and control are performed for different stages. Specifically, in the first stage, by using the second main gas regulation branch of the main gas regulation module based solely on the regulating valve mode, the compressed air energy storage system can operate continuously and stably in accordance with the working conditions in the first stage; in the second stage, by combining the second main gas regulation branch of the main gas regulation module and the second supplementary gas regulation branch of the supplementary gas regulation module, the compressed air energy storage system can operate continuously and stably in accordance with the working conditions in the second stage, so that a better expansion and power generation effect can be obtained in the entire expansion and power generation process, meeting the grid connection requirements of the power grid.

[0210] In some embodiments, a gas pressure sensor may be provided on the pipeline between the gas supply regulating module and the first-stage expander; wherein the gas pressure sensor is used to collect the pressure of the gas output by the gas supply regulating module;

[0211] Accordingly, when the method is implemented specifically, it may further include:

[0212] According to the pressure of the gas output by the gas supply regulating module, the access position of the gas output by the gas supply regulating module on the first-stage expander is adjusted.

[0213] Specifically, in the improved compressed air energy storage system, the connection position between the air supply pipeline and the first-stage expander can be moved and adjusted.

[0214] During specific implementation, according to the pressure of the gas output by the supplementary gas regulating module, when it is detected that the pressure is large and the difference value between the pressure of the gas output by the main gas regulating module is small, the access position can be moved and adjusted toward the direction of the air inlet connected to the main gas pipeline and the first-stage expansion machine according to the corresponding adjustment rules; when it is detected that the pressure is small and the difference value between the pressure of the gas output by the main gas regulating module is large, the included position can be moved and adjusted toward the direction of the air inlet connected to the main gas pipeline and the first-stage expansion machine according to the corresponding adjustment rules.

[0215] In this way, the pressure of the gas input by the gas replenishment regulating module through the access position can be made as close as possible to the gas pressure in the first-stage expander, effectively reducing the energy loss caused by work done at different gas pressures and improving the overall energy utilization rate.

[0216] In some embodiments, after controlling the second switch valve to open, the method may further include the following when implemented:

[0217] S1: adjusting the opening of the fourth regulating valve to 0, and adjusting the opening of the third regulating valve to a matching opening;

[0218] S2: connecting at least one of the pipeline between the ejection fluid interface of the second ejector and the exhaust port of the third-stage expander and the pipeline between the ejection fluid interface of the second ejector and the exhaust port of the second-stage expander, so as to introduce the exhaust gas of the third-stage expander and / or the exhaust gas of the second-stage expander as the ejection fluid to regulate the gas transported by the first gas supplement regulating branch to the first-stage expander;

[0219] S3: During the expansion power generation process, the opening of the second regulating valve and the opening of the third regulating valve are jointly adjusted according to the gas pressure in the gas storage equipment, so that the gas pressure at the air inlet of the first-stage expander meets the preset working condition requirements.

[0220] Specifically, considering that the air supply regulating module plays a more auxiliary role relative to the main air regulating module, correspondingly, the pressure of the gas output by the air supply regulating module is often lower than that of the main air regulating module. In order to reduce the excessive loss of work energy due to the large pressure difference between the working fluid and the ejection fluid in the ejector, it is preferred to connect the ejection fluid interface of the second ejector and the exhaust port of the three-stage expander by setting the tenth regulating valve on the pipeline between the ejection fluid interface of the second ejector and the exhaust port of the three-stage expander, and introduce the exhaust gas of the three-stage expansion as the ejection fluid of the second ejector, so as to better utilize the first air supply regulating branch of the air supply regulating module to adjust the ejector characteristics and reduce energy loss.

[0221] Based on the above embodiments, for the third scenario type, in the second stage, the first air supply regulation branch of the air supply regulation module can be combined with the main air regulation module based on the ejector mode to facilitate more flexible adjustment, so that the compressed air energy storage system can operate continuously and stably according to the operating conditions in the second stage, thereby achieving better expansion power generation effects in the entire expansion power generation process and meeting the grid connection requirements.

[0222] In some embodiments, a buffer container may also be provided at the intersection of the first air supply regulating branch and the second air supply regulating branch near the first-stage expander; wherein the buffer container is connected to the access position of the first-stage expander through a pipeline through the fourth gas-water heat exchanger;

[0223] Accordingly, when the method is implemented specifically, it may also include: firstly opening and utilizing the first gas supply regulating branch and the second gas supply regulating branch to respectively input the corresponding gas into the buffer container for buffering and mixing; and then inputting the buffered and mixed gas into the first-stage expander through the access position along the pipeline.

[0224] Therefore, the air supply regulating module can be used to perform relatively more complex and flexible regulation and control.

[0225] In some embodiments, the method may further include:

[0226] When the initial value of the gas pressure in the gas storage equipment is less than or equal to the pressure design value of the air inlet of the first-stage expander, the predicted value of the gas pressure in the gas storage equipment when power generation ends is less than or equal to the pressure design value of the air inlet of the first-stage expander, and the predicted value of the power generation duration is greater than the second response duration, it is determined that the operation scenario type of the expansion power generation of the compressed air energy storage system is the fourth scenario type;

[0227] Accordingly, see Figure 7 As shown, according to the target regulation rule, in the process of expansion and power generation of the compressed air energy storage system, the main gas regulation module and / or the supplementary gas regulation module of the expansion section are adjusted accordingly. When implemented specifically, it may include:

[0228] S1: Control the first switch valve and the second switch valve to open;

[0229] S2: adjusting the opening of the second regulating valve to 0, and adjusting the opening of the first regulating valve to a matching opening; at the same time, adjusting the opening of the fourth regulating valve to 0, and adjusting the opening of the third regulating valve to a matching opening;

[0230] S3: connecting at least one of the pipelines between the ejection fluid interface of the first ejector and the exhaust port of the first-stage expander and the pipelines between the ejection fluid interface of the first ejector and the exhaust port of the second-stage expander; at the same time, connecting at least one of the pipelines between the ejection fluid interface of the second ejector and the exhaust port of the third-stage expander and the pipelines between the ejection fluid interface of the third ejector and the exhaust port of the second-stage expander;

[0231] S4: During the expansion power generation process, the opening of the first regulating valve and the opening of the third regulating valve are jointly adjusted according to the gas pressure in the gas storage equipment, so that the gas pressure at the air inlet of the first-stage expander meets the preset working condition requirements.

[0232] Based on the above embodiments, for the fourth scenario type, the main gas regulation module and the supplementary gas regulation module are started at the same time at the beginning, and the first main gas regulation branch and the first supplementary gas regulation branch are used jointly, so that the compressed air energy storage system can operate continuously and stably for a long time according to the working conditions, obtain better expansion power generation effect, and meet the grid connection requirements.

[0233] In some embodiments, the method further comprises:

[0234] The initial value of the gas pressure in the gas storage equipment is greater than the pressure design value of the air inlet of the first-stage expander, the predicted value of the gas pressure in the gas storage equipment when power generation ends is less than or equal to the pressure design value of the air inlet of the first-stage expander, the predicted value of the power generation time is greater than the target power generation time, the target response time is greater than the second response time, and the operation scenario type of the expansion power generation of the compressed air energy storage system is determined to be the fifth scenario type;

[0235] Accordingly, according to the target regulation rule, in the process of expansion and power generation of the compressed air energy storage system, the main air regulation module and / or the supplementary air regulation module of the expansion section are regulated accordingly, which may specifically include:

[0236] S1: Control the first switch valve to open and the second switch valve to close;

[0237] S2: adjusting the opening of the first regulating valve to a matching opening, and adjusting the opening of the second regulating valve to 0;

[0238] S3: connecting at least one of the pipeline between the ejection fluid interface of the first ejector and the exhaust port of the first-stage expander and the pipeline between the ejection fluid interface of the first ejector and the exhaust port of the second-stage expander, so as to introduce the exhaust gas of the first-stage expander and / or the exhaust gas of the second-stage expander as the ejection fluid to regulate the gas delivered by the first main gas regulating branch to the first-stage expander;

[0239] S4: During the expansion power generation process, dynamically adjust the opening of the first regulating valve according to the gas pressure in the gas storage equipment so that the gas pressure at the air inlet of the first-stage expander meets the preset working condition requirements;

[0240] S5: When the detected gas pressure in the gas storage equipment is less than or equal to the pressure design value of the gas inlet of the first-stage expander, the second switch valve is controlled to open;

[0241] S6: adjusting the opening of the third regulating valve to 0, and adjusting the opening of the fourth regulating valve to a matching opening, so as to deliver gas to the first-stage expander through the second gas replenishment regulating branch for gas replenishment regulation;

[0242] S7: During the expansion power generation process, the opening of the second regulating valve and the opening of the fourth regulating valve are jointly adjusted according to the gas pressure in the gas storage equipment, so that the gas pressure at the air inlet of the first-stage expander meets the preset working condition requirements.

[0243] During specific implementation, in the second stage, the first air supply branch of the air supply regulating module and the first main air regulating branch of the main air regulating module may be selected for combination, including: adjusting the opening of the third regulating valve to a matching opening, and adjusting the opening of the fourth regulating valve to 0, so as to deliver gas to the first-stage expander through the first air supply regulating branch for air supply regulation; connecting at least one of the pipelines between the injection fluid interface of the second ejector and the exhaust port of the third-stage expander and the injection fluid interface of the second ejector and the exhaust port of the second-stage expander, so as to introduce the exhaust of the third-stage expander and / or the exhaust of the second-stage expander as the injection fluid to regulate the gas delivered from the first air supply regulating branch to the first-stage expander; during the expansion and power generation process, according to the gas pressure in the gas storage equipment, jointly adjust the opening of the first regulating valve and the opening of the third regulating valve, so that the gas pressure at the air inlet of the first-stage expander meets the preset working condition requirements.

[0244] Based on the above embodiments, for the fifth scenario type, in the first stage, the first main gas regulating branch of the main gas regulating module can be used alone for regulation based on the ejector mode, and in the second stage, the first main gas regulating branch of the main gas regulating module and the third supplementary gas regulating branch of the supplementary gas regulating module can be used simultaneously for joint regulation, so as to better adapt to the corresponding operating scenarios, so that the compressed air energy storage system can operate continuously and stably for a long time according to the operating conditions, obtain better expansion power generation effect, and meet the grid connection requirements.

[0245] In some embodiments, the method further comprises:

[0246] The initial value of the gas pressure in the gas storage equipment is greater than the pressure design value of the air inlet of the first-stage expander, the predicted value of the gas pressure in the gas storage equipment when power generation ends is less than or equal to the pressure design value of the air inlet of the first-stage expander, the predicted value of the power generation time is less than the target power generation time, the target response time is greater than the first response time and less than the second response time, and the operation scenario type of the expansion power generation of the compressed air energy storage system is determined to be the sixth scenario type;

[0247] Accordingly, according to the target regulation rule, in the process of expansion and power generation of the compressed air energy storage system, the main air regulation module and / or the supplementary air regulation module of the expansion section are regulated accordingly, which may specifically include:

[0248] S1: Control the first switch valve to open and the second switch valve to close;

[0249] S2: adjusting the opening of the first regulating valve to 0, and adjusting the opening of the second regulating valve to a matching third initial opening, so as to deliver gas to the first-stage expander through the second main gas regulating branch;

[0250] S3: During the expansion power generation process, dynamically adjust the opening of the second regulating valve according to the gas pressure in the gas storage equipment so that the gas pressure at the air inlet of the first-stage expander meets the preset working condition requirements;

[0251] S4: When the detected gas pressure in the gas storage equipment is less than or equal to the pressure design value of the gas inlet of the first-stage expander, the second switch valve is controlled to open;

[0252] S5: adjusting the opening of the third regulating valve to a matching opening, and adjusting the opening of the fourth regulating valve to 0, so as to deliver gas to the first-stage expander through the first gas replenishment regulating branch for gas replenishment regulation;

[0253] S6: connecting at least one of the pipeline between the ejection fluid interface of the second ejector and the exhaust port of the third-stage expander and the pipeline between the ejection fluid interface of the second ejector and the exhaust port of the second-stage expander, so as to introduce the exhaust gas of the third-stage expander and / or the exhaust gas of the second-stage expander as the ejection fluid to regulate the gas transported by the first gas supplement regulating branch to the first-stage expander;

[0254] S7: During the expansion power generation process, the opening of the first regulating valve and the opening of the third regulating valve are jointly adjusted according to the gas pressure in the gas storage equipment, so that the gas pressure at the air inlet of the first-stage expander meets the preset working condition requirements.

[0255] Based on the above embodiments, for the sixth scenario type, in the first stage, the second main gas regulating branch of the main gas regulating module can be used alone to perform regulation based on the regulating valve mode, and in the second stage, the first main gas regulating branch of the main gas regulating module, the third supplementary gas regulating branch and / or the fourth supplementary gas regulating branch of the supplementary gas regulating module can be used simultaneously to perform joint regulation based on different modes, so as to better adapt to the corresponding operating scenarios, so that the compressed air energy storage system can operate continuously and stably for a long time according to the operating conditions, obtain better expansion power generation effect, and meet the grid connection requirements.

[0256] In some embodiments, the method further comprises:

[0257] The initial value of the gas pressure in the gas storage equipment is greater than the pressure design value of the air inlet of the first-stage expander, the predicted value of the gas pressure in the gas storage equipment when power generation ends is less than or equal to the pressure design value of the air inlet of the first-stage expander, the predicted value of the power generation time is less than the target power generation time, the target response time is greater than the second response time, and the operation scenario type of the expansion power generation of the compressed air energy storage system is determined to be the seventh scenario type;

[0258] Accordingly, according to the target regulation rule, in the process of expansion and power generation of the compressed air energy storage system, the main air regulation module and / or the supplementary air regulation module of the expansion section are regulated accordingly, which may specifically include:

[0259] S1: Control the first switch valve to open and the second switch valve to close;

[0260] S2: adjusting the opening of the first regulating valve to a matching opening, and adjusting the opening of the second regulating valve to 0;

[0261] S3: connecting at least one of the pipeline between the ejection fluid interface of the first ejector and the exhaust port of the first-stage expander and the pipeline between the ejection fluid interface of the first ejector and the exhaust port of the second-stage expander, so as to introduce the exhaust gas of the first-stage expander and / or the exhaust gas of the second-stage expander as the ejection fluid to regulate the gas delivered by the first main gas regulating branch to the first-stage expander;

[0262] S4: During the expansion power generation process, dynamically adjust the opening of the first regulating valve according to the gas pressure in the gas storage equipment so that the gas pressure at the air inlet of the first-stage expander meets the preset working condition requirements;

[0263] S5: When the detected gas pressure in the gas storage equipment is less than or equal to the pressure design value of the gas inlet of the first-stage expander, the second switch valve is controlled to open;

[0264] S6: adjusting the opening of the third regulating valve to a matching opening, and adjusting the opening of the fourth regulating valve to 0, so as to deliver gas to the first-stage expander through the first gas replenishment regulating branch for gas replenishment regulation;

[0265] S7: connecting at least one of the pipeline between the ejection fluid interface of the second ejector and the exhaust port of the third-stage expander and the pipeline between the ejection fluid interface of the second ejector and the exhaust port of the second-stage expander, so as to introduce the exhaust gas of the third-stage expander and / or the exhaust gas of the second-stage expander as the ejection fluid to regulate the gas transported by the first gas supplement regulating branch to the first-stage expander;

[0266] S8: During the expansion power generation process, the opening of the first regulating valve and the opening of the third regulating valve are jointly adjusted according to the gas pressure in the gas storage equipment, so that the gas pressure at the air inlet of the first-stage expander meets the preset working condition requirements.

[0267] Based on the above embodiments, for the fifth scenario type, in the first stage, the first main gas regulating branch of the main gas regulating module can be used alone for regulation based on the ejector mode, and in the second stage, the first main gas regulating branch of the main gas regulating module and the third supplementary gas regulating branch of the supplementary gas regulating module can be used simultaneously for joint regulation, so as to better adapt to the corresponding operating scenarios, so that the compressed air energy storage system can operate continuously and stably for a long time according to the operating conditions, obtain better expansion power generation effect, and meet the grid connection requirements.

[0268] In some embodiments, the method further comprises:

[0269] The initial value of the gas pressure in the gas storage equipment is less than or equal to the pressure design value of the air inlet of the first-stage expander, the predicted value of the gas pressure in the gas storage equipment when power generation ends is less than or equal to the pressure design value of the air inlet of the first-stage expander, the predicted value of the power generation time is greater than the target power generation time, the target response time is greater than the first response time and less than the second response time, and the operation scenario type of the expansion power generation of the compressed air energy storage system is determined to be the eighth scenario type;

[0270] Accordingly, according to the target regulation rule, in the process of expansion and power generation of the compressed air energy storage system, the main air regulation module and / or the supplementary air regulation module of the expansion section are regulated accordingly, which may specifically include:

[0271] S1: Control the first switch valve and the second switch valve to open;

[0272] S2: adjusting the opening of the first regulating valve to 0, and adjusting the opening of the second regulating valve to a matching opening; at the same time, adjusting the opening of the third regulating valve to 0, and adjusting the opening of the fourth regulating valve to a matching opening;

[0273] S3: During the expansion power generation process, the opening of the second regulating valve and the opening of the fourth regulating valve are jointly adjusted according to the gas pressure in the gas storage equipment, so that the gas pressure at the air inlet of the first-stage expander meets the preset working condition requirements.

[0274] In specific implementation, it is also possible to choose to use the first air supply branch of the air supply regulating module and the second main air regulating branch of the main air regulating module in combination, including: adjusting the opening of the fourth regulating valve to 0, and adjusting the opening of the third regulating valve to a matching opening; connecting at least one of the pipelines between the injection fluid interface of the second ejector and the exhaust port of the third-stage expander, and the pipelines between the injection fluid interface of the second ejector and the exhaust port of the second-stage expander, so as to introduce the exhaust of the third-stage expander and / or the exhaust of the second-stage expander as the injection fluid to regulate the gas transported by the first air supply regulating branch to the first-stage expander; during the expansion and power generation process, according to the gas pressure in the gas storage equipment, jointly adjust the opening of the second regulating valve and the opening of the third regulating valve so that the gas pressure at the air inlet of the first-stage expander meets the preset operating conditions.

[0275] Based on the above embodiments, for the eighth scenario type, the main gas regulation module and the supplementary gas regulation module can be started at the same time at the beginning, and the second main gas regulation branch of the main gas regulation module, the third supplementary gas regulation branch and / or the fourth supplementary gas regulation branch of the supplementary gas regulation module can be jointly adjusted, so as to better adapt to the corresponding operation scenario, so that the compressed air energy storage system can operate continuously and stably for a long time according to the operating conditions, obtain better expansion power generation effect, and meet the grid connection requirements.

[0276] In some embodiments, the method further comprises:

[0277] The initial value of the gas pressure in the gas storage equipment is less than or equal to the pressure design value of the air inlet of the first-stage expander, the predicted value of the gas pressure in the gas storage equipment when power generation ends is less than or equal to the pressure design value of the air inlet of the first-stage expander, the predicted value of the power generation time is less than the target power generation time, the target response time is greater than the first response time and less than the second response time, and the operation scenario type of the expansion power generation of the compressed air energy storage system is determined to be the ninth scenario type;

[0278] Accordingly, according to the target regulation rule, in the process of expansion and power generation of the compressed air energy storage system, the main air regulation module and / or the supplementary air regulation module of the expansion section are regulated accordingly, which may specifically include:

[0279] S1: Control the first switch valve and the second switch valve to open;

[0280] S2: adjusting the opening of the first regulating valve to 0, and adjusting the opening of the second regulating valve to a matching opening; at the same time, adjusting the opening of the fourth regulating valve to 0, and adjusting the opening of the third regulating valve to a matching opening;

[0281] S3: connecting at least one of the pipeline between the ejection fluid interface of the second ejector and the exhaust port of the third-stage expander and the pipeline between the ejection fluid interface of the second ejector and the exhaust port of the second-stage expander, so as to introduce the exhaust gas of the third-stage expander and / or the exhaust gas of the second-stage expander as the ejection fluid to regulate the gas transported by the first gas supplement regulating branch to the first-stage expander;

[0282] S4: During the expansion power generation process, the opening of the second regulating valve and the opening of the third regulating valve are jointly adjusted according to the gas pressure in the gas storage equipment, so that the gas pressure at the air inlet of the first-stage expander meets the preset working condition requirements.

[0283] Based on the above embodiments, for the ninth scenario type, the main gas regulation module and the supplementary gas regulation module can be started at the same time at the beginning, and the second main gas regulation branch of the main gas regulation module and the third supplementary gas regulation branch of the supplementary gas regulation module can be used jointly for joint regulation, so as to better adapt to the corresponding operation scenario, so that the compressed air energy storage system can operate continuously and stably for a long time according to the operating conditions, obtain better expansion power generation effect, and meet the grid connection requirements.

[0284] In some embodiments, the method further comprises:

[0285] The initial value of the gas pressure in the gas storage equipment is less than or equal to the pressure design value of the air inlet of the first-stage expander, the predicted value of the gas pressure in the gas storage equipment when power generation ends is less than or equal to the pressure design value of the air inlet of the first-stage expander, the predicted value of the power generation time is less than the target power generation time, the target response time is greater than the second response time, and the operation scenario type of the expansion power generation of the compressed air energy storage system is determined to be the tenth scenario type;

[0286] Accordingly, according to the target regulation rule, in the process of expansion and power generation of the compressed air energy storage system, the main air regulation module and / or the supplementary air regulation module of the expansion section are regulated accordingly, which may specifically include:

[0287] S1: Control the first switch valve and the second switch valve to open;

[0288] S2: adjusting the opening of the first regulating valve to a matching opening, and adjusting the opening of the second regulating valve to 0; at the same time, adjusting the opening of the fourth regulating valve to 0, and adjusting the opening of the third regulating valve to a matching opening;

[0289] S3: at least one of the pipelines between the ejection fluid interface of the first ejector and the exhaust port of the first-stage expander and the pipelines between the ejection fluid interface of the first ejector and the exhaust port of the second-stage expander is connected, so as to introduce the exhaust gas of the first-stage expander and / or the exhaust gas of the second-stage expander as the ejection fluid to regulate the gas transported from the first main gas regulating branch to the first-stage expander; at the same time, at least one of the pipelines between the ejection fluid interface of the second ejector and the exhaust port of the third-stage expander and the pipelines between the ejection fluid interface of the second ejector and the exhaust port of the second-stage expander is connected, so as to introduce the exhaust gas of the third-stage expander and / or the exhaust gas of the second-stage expander as the ejection fluid to regulate the gas transported from the first main gas regulating branch to the first-stage expander;

[0290] S4: During the expansion power generation process, the opening of the first regulating valve and the opening of the third regulating valve are jointly adjusted according to the gas pressure in the gas storage equipment, so that the gas pressure at the air inlet of the first-stage expander meets the preset working condition requirements.

[0291] Based on the above embodiments, for the tenth scenario type, the main gas regulation module and the supplementary gas regulation module can be started at the same time at the beginning, and the first main gas regulation branch of the main gas regulation module and the third supplementary gas regulation branch of the supplementary gas regulation module can be used jointly for joint regulation, so as to better adapt to the corresponding operation scenario, so that the compressed air energy storage system can operate continuously and stably for a long time according to the operating conditions, obtain better expansion power generation effect, and meet the grid connection requirements.

[0292] It can be seen from the above that based on the operation adjustment method of the compressed air energy storage system provided in the embodiment of this specification, before the specific implementation, the expansion section structure of the compressed air energy storage system can be improved first, and a main air regulation module including a first main air regulation branch and a second main air regulation branch, and an air supplement regulation module including a first air supplement regulation branch and a second air supplement regulation branch are added; wherein the first main air regulation branch is connected to at least the first ejector, and the first air supplement regulation branch is connected to at least the second ejector. During specific implementation, the target grid-connected parameters, target initial parameters, and target reference parameters of the compressed air energy storage system can be obtained first; based on the target grid-connected parameters and the target initial parameters, the target prediction parameters of the compressed air energy storage system for expansion power generation can be determined; based on the target grid-connected parameters, the target initial parameters, the target reference parameters, and the target prediction parameters, the operating scenario type of expansion power generation of the compressed air energy storage system can be determined; based on the operating scenario type of expansion power generation of the compressed air energy storage system, a matching target adjustment rule can be determined from a preset adjustment rule set; based on the target adjustment rule, during the process of expansion power generation of the compressed air energy storage system, the main gas adjustment module and / or the supplementary gas adjustment module of the expansion section are adjusted accordingly. By finely distinguishing different types of expansion power generation operation scenarios, and for different types of expansion power generation operation scenarios, determining and adjusting the main gas regulation module and / or the air supply regulation module of the expansion section according to the matching target adjustment rules, it is possible to effectively recycle the residual energy of the expander exhaust gas, and finely adjust the operating parameters such as gas pressure in the expansion section system. At the same time, it is also possible to effectively increase the expander intake flow rate, so that the compressed air energy storage system can operate continuously and stably for a long time according to the operating conditions, obtain better expansion power generation effects, and thus better meet the grid connection requirements.

[0293] This specification embodiment provides a computer device, referring to Figure 8 The computer device includes a network communication port 801, a processor 802 and a memory 803, and the above structures are connected through internal cables so that each structure can perform specific data interaction.

[0294] Among them, the network communication port 801 can be specifically used to obtain the target grid-connected parameters, target initial parameters, and target reference parameters of the compressed air energy storage system; wherein the target grid-connected parameters include: target power generation, target response time, target power generation time, and the target initial parameters include: the initial value of the total amount of gas in the gas storage equipment, and the initial value of the gas pressure in the gas storage equipment; the target reference parameters include: the pressure design value of the air inlet of the first-stage expander, the first response time based on the regulating valve mode, and the second response time based on the ejector mode.

[0295] The processor 802 can be specifically used to determine the target prediction parameters of the compressed air energy storage system for expansion power generation based on the target grid-connected parameters and the target initial parameters; wherein the target prediction parameters include: the predicted value of the power generation time, the predicted value of the gas pressure in the gas storage equipment when the power generation ends; according to the target grid-connected parameters, the target initial parameters, the target reference parameters, and the target prediction parameters, determine the operating scenario type of the expansion power generation of the compressed air energy storage system; according to the operating scenario type of the expansion power generation of the compressed air energy storage system, determine a matching target adjustment rule from a preset adjustment rule set; according to the target adjustment rule, in the process of expansion power generation of the compressed air energy storage system, the main gas adjustment module and / or the supplementary gas adjustment module of the expansion section are adjusted accordingly.

[0296] The memory 803 may be specifically used to store corresponding instruction programs, as well as target prediction parameters, target adjustment rules and other related data.

[0297] Based on the above method, the relevant structural performance of computer equipment can be effectively utilized, the data processing speed of electronic equipment can be improved, and the data processing of the operation adjustment of the compressed air energy storage system can be efficiently realized.

[0298] In this embodiment, the network communication port 801 can be a virtual port that is bound to different communication protocols so that different data can be sent or received. For example, the network communication port can be a port responsible for web data communication, a port responsible for FTP data communication, or a port responsible for email data communication. In addition, the network communication port can also be a physical communication interface or communication chip. For example, it can be a wireless mobile network communication chip, such as GSM, CDMA, etc.; it can also be a WIFI chip; it can also be a Bluetooth chip.

[0299] In this embodiment, the processor 802 may be implemented in any appropriate manner. For example, the processor may take the form of a microprocessor or processor and a computer-readable medium storing a computer-readable program code (such as software or firmware) executable by the (micro)processor, a logic gate, a switch, an application specific integrated circuit (ASIC), a programmable logic controller, and an embedded microcontroller, etc. This specification does not limit this.

[0300] In this embodiment, the memory 803 may include multiple levels. In a digital system, anything that can store binary data can be a memory; in an integrated circuit, a circuit with a storage function but no physical form is also called a memory, such as RAM, FIFO, etc.; in a system, a storage device with a physical form is also called a memory, such as a memory stick, TF card, etc.

[0301] The embodiment of this specification also provides a computer-readable storage medium based on the operation adjustment method of the compressed air energy storage system mentioned above, wherein the computer-readable storage medium stores computer program instructions, and when the computer program instructions are executed, the following are achieved: obtaining the target grid-connected parameters, target initial parameters, and target reference parameters of the compressed air energy storage system; wherein the target grid-connected parameters include: target power generation, target response time, target power generation time, and the target initial parameters include: the initial value of the total amount of gas in the gas storage equipment, and the initial value of the gas pressure in the gas storage equipment; the target reference parameters include: the pressure design value of the air inlet of the first-stage expander, the first response time based on the regulating valve mode, and the second response time based on the ejector mode. long; according to the target grid-connected parameters and the target initial parameters, determine the target prediction parameters of the compressed air energy storage system for expansion power generation; wherein the target prediction parameters include: the predicted value of the power generation time, the predicted value of the gas pressure in the gas storage equipment when the power generation ends; according to the target grid-connected parameters, the target initial parameters, the target reference parameters, and the target prediction parameters, determine the operating scenario type of the expansion power generation of the compressed air energy storage system; according to the operating scenario type of the expansion power generation of the compressed air energy storage system, determine the matching target adjustment rule from the preset adjustment rule set; according to the target adjustment rule, in the process of expansion power generation of the compressed air energy storage system, the main gas adjustment module and / or the supplementary gas adjustment module of the expansion section are adjusted accordingly.

[0302] In this embodiment, the storage medium includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), a cache, a hard disk (HDD), or a memory card. The memory may be used to store computer program instructions. The network communication unit may be an interface for network connection communication set in accordance with the standard specified by the communication protocol.

[0303] In this embodiment, the functions and effects specifically implemented by the program instructions stored in the computer-readable storage medium can be explained in comparison with other implementations and will not be described in detail here.

[0304] The embodiments of the present specification also provide a computer program product, which at least includes a computer program, and when the computer program is executed by a processor, the following method steps are implemented: obtaining target grid-connected parameters, target initial parameters, and target reference parameters of a compressed air energy storage system; wherein the target grid-connected parameters include: target power generation, target response time, and target power generation time, and the target initial parameters include: the initial value of the total amount of gas in the gas storage equipment, and the initial value of the gas pressure in the gas storage equipment; the target reference parameters include: the pressure design value of the air inlet of the first-stage expander, the first response time based on the regulating valve mode, and the second response time based on the ejector mode; according to the target grid-connected parameters and the target Initial parameters are used to determine the target prediction parameters of the compressed air energy storage system for expansion power generation; wherein the target prediction parameters include: the predicted value of power generation time, the predicted value of the gas pressure in the gas storage equipment when power generation ends; according to the target grid-connected parameters, the target initial parameters, the target reference parameters, and the target prediction parameters, the operating scenario type of the expansion power generation of the compressed air energy storage system is determined; according to the operating scenario type of the expansion power generation of the compressed air energy storage system, a matching target adjustment rule is determined from a preset adjustment rule set; according to the target adjustment rule, during the expansion power generation of the compressed air energy storage system, the main gas adjustment module and / or the supplementary gas adjustment module of the expansion section are adjusted accordingly.

[0305] See also Fig. 9 As shown, the embodiment of this specification also provides an operation adjustment device for a compressed air energy storage system, which is applied to a compressed air energy storage system and may specifically include the following structural modules:

[0306] The acquisition module 901 can be specifically used to obtain the target grid-connected parameters, target initial parameters, and target reference parameters of the compressed air energy storage system; wherein the target grid-connected parameters include: target power generation, target response time, target power generation time, and the target initial parameters include: the initial value of the total amount of gas in the gas storage equipment, and the initial value of the gas pressure in the gas storage equipment; the target reference parameters include: the pressure design value of the air inlet of the first-stage expander, the first response time based on the regulating valve mode, and the second response time based on the ejector mode;

[0307] The first determination module 902 can be specifically used to determine the target prediction parameters of the compressed air energy storage system for expansion power generation according to the target grid-connected parameters and the target initial parameters; wherein the target prediction parameters include: the predicted value of power generation time, and the predicted value of the gas pressure in the gas storage equipment when power generation ends;

[0308] The second determination module 903 may be specifically used to determine the operation scenario type of expansion power generation of the compressed air energy storage system according to the target grid connection parameter, the target initial parameter, the target reference parameter, and the target prediction parameter;

[0309] The third determination module 904 may be specifically used to determine a matching target regulation rule from a preset regulation rule set according to the operation scenario type of expansion power generation of the compressed air energy storage system;

[0310] The regulation module 905 can be specifically used to adjust the main air regulation module and / or the supplementary air regulation module of the expansion section accordingly during the expansion and power generation process of the compressed air energy storage system according to the target regulation rule.

[0311] In some embodiments, when the initial value of the gas pressure in the gas storage equipment is greater than the pressure design value of the air inlet of the first-stage expander, the predicted value of the gas pressure in the gas storage equipment at the end of power generation is greater than the pressure design value of the air inlet of the first-stage expander, the predicted value of the power generation time is greater than the target power generation time, and the target response time is greater than the first response time and less than the second response time, it is determined that the operation scenario type of the expansion power generation of the compressed air energy storage system is the first scenario type;

[0312] Accordingly, when the regulating module 905 is implemented, the main gas regulating module and / or the supplementary gas regulating module of the expansion section can be adjusted accordingly according to the target regulating rules in the following manner during the expansion and power generation of the compressed air energy storage system: the first switch valve is controlled to be opened and the second switch valve is controlled to be closed; the opening of the first regulating valve is adjusted to 0, and the opening of the second regulating valve is adjusted to a matching first initial opening, so as to deliver gas to the first-stage expander through the second main gas regulating branch; during the expansion and power generation process, the opening of the second regulating valve is dynamically adjusted according to the gas pressure in the gas storage equipment, so that the gas pressure at the air inlet of the first-stage expander meets the preset operating conditions.

[0313] In some embodiments, when the initial value of the gas pressure in the gas storage equipment is greater than the pressure design value of the air inlet of the first-stage expander, the predicted value of the gas pressure in the gas storage equipment at the end of power generation is greater than the pressure design value of the air inlet of the first-stage expander, the predicted value of the power generation duration is greater than the target power generation duration, and the target response duration is greater than the second response duration, the operation scenario type of the expansion power generation of the compressed air energy storage system is determined to be the second scenario type;

[0314] Accordingly, when the regulating module 905 is implemented, the main gas regulating module and / or the supplementary gas regulating module of the expansion section can be adjusted accordingly according to the target regulating rules in the following manner during the expansion and power generation process of the compressed air energy storage system: the first switch valve is controlled to be opened and the second switch valve is controlled to be closed; the opening of the second regulating valve is adjusted to 0, and the opening of the first regulating valve is adjusted to a matching second initial opening; at least one of the pipelines between the injection fluid interface of the first ejector and the exhaust port of the first-stage expander and the pipelines between the injection fluid interface of the first ejector and the exhaust port of the second-stage expander is connected to introduce the exhaust of the first-stage expander and / or the exhaust of the second-stage expander as the injection fluid to regulate the gas transported by the first main gas regulating branch to the first-stage expander; during the expansion and power generation process, the opening of the first regulating valve is dynamically adjusted according to the gas pressure in the gas storage equipment so that the gas pressure at the air inlet of the first-stage expander meets the preset working condition requirements.

[0315] In some embodiments, during the expansion and power generation process, the device can also dynamically adjust the opening of the first regulating valve and / or the opening of the corresponding auxiliary regulating valve according to the gas pressure in the gas storage equipment, so that the gas pressure at the air inlet of the first-stage expansion machine meets the preset operating requirements.

[0316] In some embodiments, during the expansion and power generation process, the device can also jointly adjust the opening of the first regulating valve and the opening of the second regulating valve according to the gas pressure in the gas storage equipment, so as to respectively deliver the corresponding gas to the buffer container through the first main gas regulating branch and the second main gas regulating branch; and use the buffer container to buffer and mix the gas so that the gas pressure at the air inlet of the first-stage expander meets the preset operating conditions.

[0317] In some embodiments, when the initial value of the gas pressure in the gas storage equipment is greater than the pressure design value of the air inlet of the first-stage expander, the predicted value of the gas pressure in the gas storage equipment when power generation ends is less than or equal to the pressure design value of the air inlet of the first-stage expander, the predicted value of the power generation duration is greater than the target power generation duration, and the target response duration is greater than the first response duration and less than the second response duration, it is determined that the operation scenario type of the expansion power generation of the compressed air energy storage system is the third scenario type;

[0318] Accordingly, when the regulating module 905 is specifically implemented, the main gas regulating module and / or the supplementary gas regulating module of the expansion section can be adjusted accordingly according to the target regulating rules in the following manner during the expansion and power generation process of the compressed air energy storage system: the first switch valve is controlled to be opened and the second switch valve is controlled to be closed; the opening of the first regulating valve is adjusted to 0, and the opening of the second regulating valve is adjusted to a matching third initial opening, so as to deliver gas to the first-stage expander through the second main gas regulating branch; during the expansion and power generation process, the opening of the second regulating valve is dynamically adjusted according to the gas pressure in the gas storage equipment, so that one The gas pressure at the air inlet of the first-stage expander meets the preset working condition requirements; when the detected gas pressure in the gas storage equipment is less than or equal to the pressure design value of the air inlet of the first-stage expander, the second switch valve is controlled to open; the opening of the third regulating valve is adjusted to 0, and the opening of the fourth regulating valve is adjusted to a matching opening, so as to deliver gas to the first-stage expander through the second air supply regulating branch for air supply regulation; during the expansion and power generation process, according to the gas pressure in the gas storage equipment, the openings of the second regulating valve and the fourth regulating valve are jointly adjusted so that the gas pressure at the air inlet of the first-stage expander meets the preset working condition requirements.

[0319] In some embodiments, when the device is implemented, the access position of the gas output from the gas supply regulating module on the first-stage expander can be adjusted according to the pressure of the gas output from the gas supply regulating module.

[0320] In some embodiments, after controlling the second switch valve to open, when the device is implemented, it is also possible to: adjust the opening of the fourth regulating valve to 0, and adjust the opening of the third regulating valve to a matching opening; connect at least one of the pipelines between the injection fluid interface of the second ejector and the exhaust port of the third-stage expander, and the pipelines between the injection fluid interface of the second ejector and the exhaust port of the second-stage expander, so as to introduce the exhaust of the third-stage expander and / or the exhaust of the second-stage expander as the injection fluid to regulate the gas transported by the first gas replenishment regulating branch to the first-stage expander; during the expansion and power generation process, according to the gas pressure in the gas storage equipment, jointly adjust the opening of the second regulating valve and the opening of the third regulating valve, so that the gas pressure at the air inlet of the first-stage expansion machine meets the preset operating conditions.

[0321] In some embodiments, when the initial value of the gas pressure in the gas storage equipment is less than or equal to the pressure design value of the air inlet of the first-stage expander, the predicted value of the gas pressure in the gas storage equipment when power generation ends is less than or equal to the pressure design value of the air inlet of the first-stage expander, and the predicted value of the power generation duration is greater than the second response duration, the operation scenario type of the expansion power generation of the compressed air energy storage system is determined to be the fourth scenario type;

[0322] Accordingly, when the regulating module 905 is implemented, the main gas regulating module and / or the supplementary gas regulating module of the expansion section can be adjusted accordingly according to the target regulating rule in the following manner during the expansion and power generation process of the compressed air energy storage system: the first switch valve and the second switch valve are controlled to be opened; the opening of the second regulating valve is adjusted to 0, and the opening of the first regulating valve is adjusted to a matching opening; at the same time, the opening of the fourth regulating valve is adjusted to 0, and the opening of the third regulating valve is adjusted to a matching opening; the ejection fluid interface of the first ejector is connected to the first expansion valve; At least one of the pipelines between the exhaust port of the first expander and the exhaust port of the second-stage expander, and the pipelines between the ejection fluid interface of the first ejector and the exhaust port of the second-stage expander is connected; at the same time, at least one of the pipelines between the ejection fluid interface of the second ejector and the exhaust port of the third-stage expander, and the pipelines between the ejection fluid interface of the third ejector and the exhaust port of the second-stage expander is connected; during the expansion and power generation process, according to the gas pressure in the gas storage equipment, the opening of the first regulating valve and the opening of the third regulating valve are jointly adjusted to make the gas pressure at the air inlet of the first-stage expander meet the preset working condition requirements.

[0323] It should be noted that the units, devices or modules described in the above embodiments can be implemented by computer chips or entities, or by products with certain functions. For the convenience of description, the above devices are described separately by functions divided into various modules. Of course, when implementing this specification, the functions of each module can be implemented in the same or more software and / or hardware, or the modules that implement the same function can be implemented by a combination of multiple sub-modules or sub-units. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0324] As can be seen from the above, the operation and regulation device of the compressed air energy storage system provided in the embodiment of this specification can accurately and specifically regulate the main gas regulation module and / or the supplementary gas regulation module of the expansion section by finely distinguishing different types of operation scenarios of expansion and power generation, and determining and adjusting the target regulation rules according to the matching target regulation rules for different types of operation scenarios of expansion and power generation, so as to effectively recycle the residual energy of the expander exhaust gas, finely adjust the operating parameters such as gas pressure in the expansion section system, and effectively increase the air intake flow of the expander, so that the compressed air energy storage system can operate continuously and stably for a long time according to the operating conditions, obtain better expansion and power generation effect, and thus better meet the grid connection requirements of the power grid.

[0325] In a specific scenario example, the operation regulation method and device of the compressed air energy storage system provided in this specification can be applied to realize the operation regulation of compressed gas energy storage. The specific implementation process can be referred to the following content.

[0326] In this scenario example, a compressed gas energy storage operation regulation system (for example, a compressed air energy storage system) is proposed, which aims to solve the problems of large throttling losses and failure to effectively recover the throttling losses caused by the throttling regulation and air supply valve regulation methods currently used in expanders, and poor flexibility and adjustability of the throttling methods, resulting in poor performance of the unit during the entire operation period. By designing a compressed gas energy storage power station operation regulation device based on the gas ejector principle, efficient and flexible operation regulation of the expansion and power generation operation process of the compressed gas energy storage power station can be achieved.

[0327] Among them, the compressed gas energy storage power station operation regulating device based on the gas ejector principle can utilize the entrainment effect of the high-pressure gas in the gas ejector on the low-pressure gas, so that the high-pressure gas can effectively entrain part of the low-pressure gas while throttling and reducing the pressure inside the ejector, so as to convert part of the throttling loss of the main gas flow into the work capacity of the entrained gas flow, and increase the gas mass flow rate at the ejector outlet, which helps to improve the gas flow rate and work capacity at the expander inlet. This regulation method takes into account the advantages of both gas replenishment operation and throttling operation, and effectively recovers the work capacity of exhaust gas at each stage of the expander, and the various combinations of gas ejectors and regulating valves make the system highly adaptable in all operating ranges.

[0328] In this scenario example, in terms of overall layout, the above-mentioned compressed gas energy storage operation and regulation system mainly includes: expander, gas-water heat exchanger, high-temperature heat storage tank, low-temperature heat storage tank, gas ejector and gas storage equipment and other equipment, in addition to a number of switch valves and regulating valves. Taking the compressed gas energy storage system with a three-stage expander and one-time gas replenishment operation as an example, the first-stage expander, the second-stage expander, and the third-stage expander are arranged in series with the gas-water heat exchanger 1, the gas-water heat exchanger 2, and the gas-water heat exchanger 3, respectively. The inlet and outlet of the air side pipeline of each stage of the gas-water heat exchanger are respectively connected to the upper and lower expanders, and the inlet and outlet of the heat storage medium side pipeline are respectively connected to the high-temperature heat storage tank and the low-temperature heat storage tank. The gas storage equipment can be one or more combinations of underground salt caverns, artificial chambers, steel containers, etc. The compressed gas can be air or carbon dioxide gas.

[0329] The first-stage expander is provided with two gas inlets, which are respectively connected to the gas storage reservoir through the main gas pipeline and the supplementary gas pipeline. The main gas pipeline is the first gas supply pipeline of the expander. The high-pressure gas enters the first-stage expander for expansion and power generation after passing through the main gas pipeline, the main gas regulating module and the gas-water heat exchanger 1. The supplementary gas pipeline is the first gas supply pipeline of the expander. The high-pressure gas enters the first-stage expander for expansion and power generation after passing through the supplementary gas pipeline, the supplementary gas regulating module and the gas-water heat exchanger 4. The gas in the main gas pipeline enters the expander from the first-stage impeller of the first-stage expander, and the gas in the supplementary gas pipeline enters the expander from the middle stage of the first-stage expander.

[0330] The main gas regulating module includes a first regulating valve, a second regulating valve and a first ejector, and the supplementary gas regulating module includes a third regulating valve, a fourth regulating valve and a second ejector, and the two groups of regulating modules have the same configuration. The functions are similar, and the operation mode and working flow of the main gas flow and the supplementary gas flow are adjusted in the expansion section respectively. The first and second ejectors are both gas ejectors, which include working fluid, ejection fluid and mixed fluid, and are intended to form a suction effect on the low-pressure ejection fluid through the acceleration and throttling and pressure reduction effect of the working fluid in the nozzle, and after being fully mixed in the mixing section, the pressure is further increased by the diffuser section and then ejected. The working fluid comes from the high-pressure fluid in the gas storage reservoir, and the ejection fluid comes from the exhaust of the first-stage expander, the second-stage expander, and the third-stage expander. The mixed fluid can lead to the main gas inlet or the supplementary gas inlet of the first-stage expander. The second regulating valve and the fourth regulating valve and their pipelines are bypass pipelines, which are used for operation control that does not participate in the operation regulation of gas ejection but is only regulated by the opening of the regulating valve. The first regulating valve is connected to the first ejector, the third regulating valve is connected to the second ejector, and the first regulating valve and the third regulating valve respectively control the flow rate of the working fluid entering the ejector.

[0331] Specifically, the selection of the ejection gas source should take into account the pressure difference between the gas source and the main gas or supplementary gas flow, the working performance of the ejector, the work capacity of the gas flow, etc. In general, compared with using the exhaust of the second or third stage expander as the supplementary gas source, when the exhaust of the first stage expander with high pressure parameters is selected as the ejection gas source of the main gas flow, the work capacity of the mixed gas flow can be effectively improved. However, since the exhaust parameters of the first stage expander are relatively high and still have a high work capacity, it is not economically reasonable from the perspective of energy recovery. If the exhaust of the third stage expander with the lowest pressure parameters is used as the ejection gas source, the effective work capacity of the main gas source may be greatly affected due to the large difference in pressure parameters between the exhaust and the main gas source.

[0332] Therefore, in this scenario example, after comprehensive consideration of low-pressure exhaust energy recovery and ensuring the work capacity of high-pressure gas, it is recommended that the exhaust of the first and second-stage expanders be used as the induced gas source for the main gas pipeline, and the exhaust of the second-stage expander is more recommended as the induced gas source; it is recommended that the exhaust of the second and third-stage expanders be used as the induced gas source for the supplementary gas pipeline, and the exhaust of the third-stage expander is more recommended as the induced gas source. Considering that the gas parameters at the outlets of each stage of the expander are quite different (for example, when the exhaust pressure of the third-stage expander is 0.1MPa, the exhaust at the outlet of the second-stage expander can be 0.4-0.6MPa), in order to maximize the conversion of the work capacity of the high-pressure gas into electrical energy, it is not recommended to mix the two-stage exhaust as the induced fluid of the ejector, which will sacrifice the work capacity of the high-pressure parameter gas. Therefore, the embodiments of this scheme all use a single gas source of the exhaust of a certain stage as the induced fluid.

[0333] However, if after technical and economic comparison, the exhaust gas of the multi-stage expander is mixed as the ejector fluid, it can still have the advantage of improving the performance of the expander, and the exhaust gas of the multi-stage expander can be mixed and utilized as the ejector fluid.

[0334] For the expander system, the first-stage expander, the second-stage expander, and the third-stage expander are connected in series with the gas-water heat exchanger 1, the gas-water heat exchanger 2, and the gas-water heat exchanger 3, respectively. The first-stage expander is provided with a main gas inlet and a supplementary gas inlet, which respectively receive the main gas flow and the supplementary gas flow from the gas storage reservoir. The gas-water heat exchanger 1 and the gas-water heat exchanger 4 are respectively used to heat the main gas flow and the supplementary gas flow, so that they are heated to the rated temperature of the expander inlet to enhance the working capacity of the gas flow. The gas-water heat exchanger 2 and the gas-water heat exchanger 3 are respectively used to heat the exhaust gas flow of the first-stage expander and the second-stage expander, so that they are heated again to the rated temperature to enhance the working capacity of the gas flow. The outlet of the first-stage expander is provided with a fifth regulating valve and an eighth regulating valve, the outlet of the second-stage expander is provided with a sixth regulating valve and a ninth regulating valve, and the outlet of the third-stage expander is provided with a seventh regulating valve and a tenth regulating valve. Among them, the fifth regulating valve, the sixth regulating valve and the seventh regulating valve respectively control the amount of air entering the first ejector fluid inlet, and the eighth regulating valve, the ninth regulating valve and the tenth regulating valve respectively control the amount of air entering the second ejector fluid inlet.

[0335] For the heat storage system, the inlets of the four gas-water heat exchangers are connected to the high-temperature liquid storage tank, and the outlets are connected to the low-temperature liquid storage tank, and switch valves are respectively set at the inlet and outlet to control the on-off of the heat storage medium. The heat storage medium realizes the recovery and storage of heat in the compression process and the release of heat in the expansion stage. The heat storage medium can be one of water, heat transfer oil or molten salt, etc., or a combination according to the heat storage temperature.

[0336] It should be noted that the system schematic diagram given in this scenario example is an example of a compressed gas energy storage system with a three-stage expander and a single air supply operation. Only one air supply port is set in the first-stage expander. If there are multiple air supply ports or air supply is provided at the inlet of other stages of expanders or at a certain intermediate stage, the method given in this patent can still be applied to achieve operational regulation of the expansion process, which should be regarded as an extended use of this scheme and should also be regarded as within the scope of protection of this scheme.

[0337] The following describes in detail the specific operation adjustment method based on the above system in combination with 12 embodiments corresponding to different operation scenarios as shown in Table 1.

[0338] Table 1

[0339]

[0340] In specific implementation, when performing operation adjustment, the target power generation P1 and the target power generation time t can be collected. e1 , system target response time t r1 , gas mass m in the power station gas storage, gas pressure p in the gas storage at the start of operation st,begin , System response time t using pure regulating valve control r21 、System response time t using ejection regulation mode control r22 , the first-stage expander inlet design pressure p e,in . Based on the target power generation P1 and target power generation duration t e1 , and the gas mass m in the gas storage, the gas pressure p in the gas storage st,begin Calculate the gas pressure p of the gas storage reservoir at the end of operation st,end and expected power generation duration t e2 .

[0341] Example 1 (corresponding to the first scenario type)

[0342] When the gas pressure p of the gas storage tank is met, the operation starts. st,begin The gas pressure p of the gas storage reservoir at the end of operation is calculated st,end Both are higher than the first-stage expander inlet design pressure p e,in At this time, the target power generation duration t must be met e1 Less than the expected power generation time t e2 , indicating that the gas storage capacity and pressure of the gas storage reservoir are sufficient, and the power generation demand can be met by only opening the main gas pipeline without opening the supplementary gas pipeline.

[0343] Furthermore, the system target response time t r1 The system response time t is respectively the same as that of the pure regulating valve control system r21 、System response time t using ejection regulation mode control r22For comparison, when t r21 <t r1 <t r22 When the main gas pipeline is in operation, pure regulating valve control is required to achieve the fastest system response and grid-connected power generation.

[0344] The specific operation is as follows: In this stage, the gas-water heat exchangers 1 to 3 and the first to third stage expansion machines need to be kept in working condition, and the first switch valve, the second regulating valve and the related switch valves are opened, wherein the second regulating valve is adjusted within its own adjustment range (such as adjusting the valve opening to 0% to 100%) to meet the adjustment of the main gas flow pressure and flow.

[0345] Embodiment 2 (corresponding to the second scenario type)

[0346] When the gas pressure p of the gas storage tank is met, the operation starts. st,begin The gas pressure p of the gas storage reservoir at the end of operation is calculated st,end Both are higher than the first-stage expander inlet design pressure p e,in At this time, the target power generation duration t must be met e1 Less than the expected power generation time t e2 , indicating that the gas storage capacity and pressure of the gas storage reservoir are sufficient, and the power generation demand can be met by only opening the main gas pipeline without opening the supplementary gas pipeline.

[0347] Furthermore, the system target response time t r1 The system response time t is respectively the same as that of the pure regulating valve control system r21 、System response time t using ejection regulation mode control r22 For comparison, when t r1 >t r22 When the main gas pipeline is used, the injection adjustment mode control is required to achieve maximum energy utilization. When selecting the injection gas source, it is recommended that the injection gas source of the main gas pipeline be the exhaust gas of the first and second stage expanders, and the exhaust gas of the second stage expander is more recommended as the injection gas source.

[0348] The specific operations are as follows: During this stage, the gas-water heat exchangers 1 to 3, the first to third stage expansion machines and the first ejector need to be kept in working condition, and the first switch valve, the first regulating valve and the corresponding switch valve are opened, wherein the first regulating valve is adjusted within its own adjustment range (such as adjusting the valve opening to 0% to 100%) to meet the gas storage reservoir's adjustment of the airflow pressure and flow of the first ejector.

[0349] After technical and economic comparison, the ejection gas flow of the first ejector can select any one of the first-stage, second-stage, and third-stage expanders, and the corresponding opened regulating valves are the fifth, sixth, and seventh regulating valves. In order to maximize the use of the working capacity of the gas, only one of the fifth, sixth, and seventh regulating valves is opened at the same time (such as the three can adopt the opening sequence of the seventh, sixth, and fifth regulating valves), and each valve can be adjusted within its own adjustment range (such as adjusting the valve opening to 0% to 100%), so as to adjust the ejection gas source and realize the adjustment of the main gas flow parameters. When selecting the ejection gas source, it is recommended that the ejection gas source of the main gas pipeline adopts the exhaust gas of the first-stage and second-stage expanders, and the exhaust gas of the second-stage expander is more recommended as the ejection gas source.

[0350] Embodiment 3 (corresponding to the third scenario type)

[0351] When the gas pressure p of the gas storage tank is met, the operation starts. st,begin Higher than the first-stage expander inlet design pressure p e,in , calculate the gas pressure p of the gas storage reservoir at the end of operation st,end Equal to or lower than the first-stage expander inlet design pressure p e,in , and the target power generation duration is t e1 Greater than the expected power generation time of the gas storage facility t e2 , indicating that the total gas storage capacity of the gas storage reservoir is sufficient but the pressure level is not enough to meet the full process of main gas pipeline operation. It is necessary to open the main gas pipeline in the first stage and open both the main gas and supplementary gas pipelines in the second stage to meet the power generation demand.

[0352] Furthermore, the system target response time t r1 The system response time t is respectively the same as that of the pure regulating valve control system r21 、System response time t using ejection regulation mode control r22 For comparison, when t r21 <t r1 <t r22 When the main gas pipeline and the supplementary gas pipeline are in operation, pure regulating valve mode control is required to achieve the fastest system response and grid-connected power generation.

[0353] Specific operation: ① (for example, the first stage) when the gas pressure p st Higher than the first-stage expander inlet design pressure p e,in , the main gas flow is regulated by a pure regulating valve. In this stage, the gas-water heat exchangers 1 to 3 and the first to third stage expanders need to be kept in working condition, and the first switch valve, the second regulating valve and the related switch valves are opened. The second regulating valve is adjusted within its own adjustment range (such as adjusting the valve opening to 0% to 100%) to meet the adjustment of the main gas flow pressure and flow. ② (For example, the second stage) When the gas pressure pst Lower than the first-stage expander inlet design pressure p e,in When the air supply airflow is purely regulated by the regulating valve, the second switch valve and the fourth regulating valve are opened, wherein the fourth regulating valve is adjusted within its own regulating range (such as adjusting the valve opening to 0% to 100%) to meet the adjustment of the air supply airflow pressure and flow.

[0354] Embodiment 4 (corresponding to the third scenario type)

[0355] When the gas pressure p of the gas storage tank is met, the operation starts. st,begin Higher than the first-stage expander inlet design pressure p e,in , calculate the gas pressure p of the gas storage reservoir at the end of operation st,end Equal to or lower than the first-stage expander inlet design pressure p e,in , and the target power generation duration is t e1 Greater than the expected power generation time of the gas storage facility t e2 , indicating that the total gas storage capacity of the gas storage is sufficient but the pressure level is not enough to meet the full process of the main gas pipeline operation. It is necessary to open the main gas pipeline in the first stage and open the main gas and supplementary gas pipelines at the same time in the second stage to meet the power generation demand. Further, the system target response time t r1 The system response time t is respectively the same as that of the pure regulating valve control system r21 、System response time t using ejection regulation mode control r22 For comparison, when t r21 <t r1 <t r22 When the system is in operation, the pure regulating valve mode can be used for the main gas pipeline, and the induced gas regulating mode can be used for the supplementary gas source, so that the system can achieve the fastest system response and grid-connected power generation in the initial stage of operation. This method can recover part of the gas volume through induced gas to extend the power generation time as much as possible under the premise of ensuring fast response time.

[0356] Specific operation: ① When the gas pressure p st Higher than the first-stage expander inlet design pressure p e,in ② When the gas pressure in the gas storage reservoir is p st Lower than the first-stage expander inlet design pressure p e,inWhen the air supply pipeline is further induced, the air-water heat exchanger 4, the second switch valve, the third regulating valve, and the related switch valves need to be opened continuously at this stage, so that the second ejector is kept in working state. The third regulating valve is adjusted within its own adjustment range (such as adjusting the valve opening to 0% to 100%) to meet the adjustment of the air flow pressure and flow rate from the gas storage to the second ejector. The induced air flow of the second ejector can select any one of the first-stage, second-stage, and third-stage expanders, and the corresponding opened regulating valves are the eighth, ninth, and tenth regulating valves. In order to maximize the use of the working capacity of the gas, only one of the eighth, ninth, and tenth regulating valves is opened at the same time (such as the three can adopt the opening sequence of the tenth, ninth, and eighth regulating valves), and each valve can be adjusted within its own adjustment range (such as adjusting the valve opening to 0% to 100%), so as to achieve the adjustment of the parameters of the air supply air flow by adjusting the induced air source. When selecting the gas source, it is recommended that the exhaust gas of the second-stage and third-stage expanders be used as the induced gas source of the gas supply pipeline, and the exhaust gas of the third-stage expander is more recommended as the induced gas source.

[0357] Example 5 (corresponding to the fifth scenario type)

[0358] When the gas pressure p of the gas storage tank is met, the operation starts. st,begin Higher than the first-stage expander inlet design pressure p e,in , and the calculated gas pressure p of the gas storage reservoir at the end of operation is st,end Equal to or lower than the first-stage expander inlet design pressure p e,in , and the target power generation duration is t e1 Less than the expected power generation time of the gas storage facility t e2 , indicating that the total gas storage capacity of the gas storage reservoir is sufficient but the pressure level is not enough to meet the full process of main gas pipeline operation. It is necessary to open the main gas pipeline in the first stage and open both the main gas and supplementary gas pipelines in the second stage to meet the power generation demand.

[0359] Furthermore, the system target response time t r1 The system response time t is respectively the same as that of the pure regulating valve control system r21 、System response time t using ejection regulation mode control r22 For comparison, when t r1 >t r22 When the main gas pipeline and the supplementary gas pipeline are both controlled by the ejection regulation mode, the system energy recovery can be achieved under the premise of meeting the response time and power generation requirements.

[0360] Specific operation: ① When the gas pressure p st Higher than the first-stage expander inlet design pressure p e,inWhen the main gas flow is induced, the ejector is regulated. In this stage, the gas-water heat exchangers 1 to 3, the first to third stage expanders and the first ejector need to be kept in working state, and the first switch valve, the first regulating valve and the related switch valves are opened, wherein the first regulating valve is adjusted within its own adjustment range (such as adjusting the valve opening to 0% to 100%) to meet the adjustment of the gas pressure and flow rate from the gas storage to the first ejector. After technical and economic comparison, the ejector gas flow of the first ejector can select any one of the first, second and third stage expanders, and the corresponding opened regulating valves are the fifth, sixth and seventh regulating valves respectively. It is recommended that the ejector gas source of the main gas pipeline adopt the exhaust gas of the first and second stage expanders, and the exhaust gas of the second stage expander is more recommended as the ejector gas source. In order to maximize the use of the working capacity of the gas, only one of the fifth, sixth and seventh regulating valves is opened at the same time (for example, the three can adopt the opening sequence of the seventh, sixth and fifth regulating valves), and each valve can be adjusted within its own adjustment range (for example, the adjustment valve opening is 0% to 100%), so as to adjust the main gas flow parameters by adjusting the induced gas source. ② When the gas pressure p st Lower than the first-stage expander inlet design pressure p e,in When the main gas flow and the supplementary gas flow are both induced to adjust, the gas-water heat exchanger 4, the second switch valve, the third regulating valve, the ninth switch valve and the tenth switch valve need to be opened continuously in this stage, so that the second ejector is kept in working state. The third regulating valve is adjusted within its own adjustment range (such as adjusting the valve opening to 0% to 100%) to meet the adjustment of the gas pressure and flow rate of the gas storage to the second ejector. The induced gas flow of the second ejector can select any one of the first-stage, second-stage and third-stage expanders, and the corresponding opened regulating valves are the eighth, ninth and tenth regulating valves respectively. In order to maximize the use of the working capacity of the gas, only one of the eighth, ninth and tenth regulating valves is opened at the same time (such as the three can adopt the opening sequence of the tenth, ninth and eighth regulating valves), and each valve can be adjusted within its own adjustment range (such as adjusting the valve opening to 0% to 100%), so as to achieve the adjustment of the supplementary gas flow parameters by adjusting the induced gas source.

[0361] When selecting the induced gas source, it is recommended that the induced gas source of the main gas pipeline adopt the exhaust gas of the first-stage and second-stage expanders, and the exhaust gas of the second-stage expander is more recommended as the induced gas source; it is recommended that the induced gas source of the air supply pipeline adopt the exhaust gas of the second-stage and third-stage expanders, and the exhaust gas of the third-stage expander is more recommended as the induced gas source.

[0362] Embodiment 6 (corresponding to the sixth scenario type)

[0363] When the gas pressure p of the gas storage tank is met, the operation starts. st,begin Higher than the first-stage expander inlet design pressure p e,in, and the calculated gas pressure p of the gas storage reservoir at the end of operation is st,end Equal to or lower than the first-stage expander inlet design pressure p e,in , and the target power generation duration is t e1 Greater than the expected power generation time of the gas storage facility t e2 , indicating that the total gas storage capacity and pressure of the gas storage reservoir are not sufficient, and it is necessary to open the main gas pipeline in the first stage, and open both the main gas and supplementary gas pipelines in the second stage to meet the power generation demand.

[0364] Furthermore, the system target response time t r1 The system response time t is respectively the same as that of the pure regulating valve control system r21 、System response time t using ejection regulation mode control r22 For comparison, when t r21 <t r1 <t r22 When the system is in operation, the pure regulating valve mode can be used for the main gas pipeline, and the regulating and ejecting regulating mode can be used for the supplementary gas source, so that the system can achieve the fastest system response and grid-connected power generation in the initial stage of operation.

[0365] Specific operation: ① When the gas pressure p st Higher than the first-stage expander inlet design pressure p e,in ② When the gas pressure in the gas storage reservoir is p st Lower than the first-stage expander inlet design pressure p e,in When the second ejector is used, the air flow is induced to adjust the air flow, and the second switch valve and the third regulating valve are opened, wherein the third regulating valve is adjusted within its own adjustment range (such as adjusting the valve opening to 0% to 100%) to meet the adjustment of the air flow pressure and flow rate from the gas storage to the second ejector. The ejection air flow of the second ejector can select any one of the first-stage, second-stage, and third-stage expanders, and the corresponding opened regulating valves are the eighth, ninth, and tenth regulating valves. In order to maximize the use of the working capacity of the gas, only one of the eighth, ninth, and tenth regulating valves is opened at the same time (such as the three can adopt the opening sequence of the tenth, ninth, and eighth regulating valves), and each valve can be adjusted within its own adjustment range (such as adjusting the valve opening to 0% to 100%), so as to adjust the parameters of the air flow by adjusting the ejection gas source. When selecting the gas source, it is recommended that the ejection gas source of the air supply pipeline adopts the exhaust of the second-stage and third-stage expanders, and the exhaust of the third-stage expander is more recommended as the ejection gas source.

[0366] Embodiment 7 (corresponding to the seventh scenario type)

[0367] When the gas pressure p of the gas storage tank is met, the operation starts. st,begin Higher than the first-stage expander inlet design pressure p e,in , and the calculated gas pressure p of the gas storage reservoir at the end of operation is st,end Equal to or lower than the first-stage expander inlet design pressure p e,in , and the target power generation duration is t e1 Greater than the expected power generation time of the gas storage facility t e2 , indicating that the total gas storage capacity and pressure of the gas storage reservoir are not sufficient, and it is necessary to open the main gas pipeline in the first stage, and open both the main gas and supplementary gas pipelines in the second stage to meet the power generation demand.

[0368] Furthermore, the system target response time t r1 The system response time t is respectively the same as that of the pure regulating valve control system r21 、System response time t using ejection regulation mode control r22 For comparison, when t r1 >t r22 When the main gas pipeline and the supplementary gas pipeline are in the state of being in short supply, the ejection regulation mode control is required to achieve system response and grid-connected power generation.

[0369] Specific operation: Specific operation: ① When the gas pressure p st Higher than the first-stage expander inlet design pressure p e,in When the main gas flow is induced, the main gas flow is regulated by injection. In this stage, the gas-water heat exchangers 1 to 3, the first to third stage expanders and the first ejector need to be kept in working state, and the first switch valve, the first regulating valve and the third to eighth switch valves are opened, wherein the first regulating valve is adjusted within its own adjustment range (such as adjusting the valve opening to 0% to 100%) to meet the adjustment of the gas pressure and flow rate from the gas storage to the first ejector. After technical and economic comparison, the ejection gas flow of the first ejector can select any one of the first, second and third stage expanders, and the corresponding regulating valves to be opened are the fifth, sixth and seventh regulating valves respectively. It is recommended that the ejection gas source of the main gas pipeline adopt the exhaust gas of the first and second stage expanders, and the exhaust gas of the second stage expander is more recommended as the ejection gas source. In order to maximize the use of the working capacity of the gas, only one of the fifth, sixth and seventh regulating valves is opened at the same time (for example, the three can adopt the opening sequence of the seventh, sixth and fifth regulating valves), and each valve can be adjusted within its own adjustment range (for example, the adjustment valve opening is 0% to 100%), so as to adjust the main gas flow parameters by adjusting the induced gas source. ② When the gas pressure p st Lower than the first-stage expander inlet design pressure p e,inWhen the main gas flow and the supplementary gas flow are both induced to adjust, the gas-water heat exchanger 4, the second switch valve, the third regulating valve, the ninth switch valve and the tenth switch valve need to be opened continuously in this stage, so that the second ejector is kept in working state. The third regulating valve is adjusted within its own adjustment range (such as adjusting the valve opening to 0% to 100%) to meet the adjustment of the gas pressure and flow rate of the gas storage to the second ejector. The induced gas flow of the second ejector can select any one of the first-stage, second-stage and third-stage expanders, and the corresponding opened regulating valves are the eighth, ninth and tenth regulating valves respectively. In order to maximize the use of the working capacity of the gas, only one of the eighth, ninth and tenth regulating valves is opened at the same time (such as the three can adopt the opening sequence of the tenth, ninth and eighth regulating valves), and each valve can be adjusted within its own adjustment range (such as adjusting the valve opening to 0% to 100%), so as to achieve the adjustment of the supplementary gas flow parameters by adjusting the induced gas source.

[0370] When selecting the induced gas source, it is recommended that the induced gas source of the main gas pipeline adopt the exhaust gas of the first-stage and second-stage expanders, and the exhaust gas of the second-stage expander is more recommended as the induced gas source; it is recommended that the induced gas source of the air supply pipeline adopt the exhaust gas of the second-stage and third-stage expanders, and the exhaust gas of the third-stage expander is more recommended as the induced gas source.

[0371] Embodiment 8 (corresponding to the eighth scenario type)

[0372] When the gas pressure p of the gas storage tank is met, the operation starts. st,begin Equal to or lower than the first-stage expander inlet design pressure p e,in , and the calculated gas pressure p of the gas storage reservoir at the end of operation is st,end Equal to or lower than the first-stage expander inlet design pressure p e,in , and the target power generation duration is t e1 Less than the expected power generation time of the gas storage facility t e2 , indicating that the total gas storage capacity of the gas storage reservoir is abundant, but the pressure level is low, and the main gas and supplementary gas pipelines need to be directly opened to meet the power generation needs.

[0373] Furthermore, the system target response time t r1 The system response time t is respectively the same as that of the pure regulating valve control system r21 、System response time t using ejection regulation mode control r22 For comparison, when t r21 <t r1 <t r22 When the main gas pipeline and the supplementary gas pipeline are in operation, pure regulating valve mode control is required to achieve the fastest system response and grid-connected power generation.

[0374] Specific operation: perform pure regulating valve adjustment on the main gas flow and the supplementary gas flow, open the first switch valve to the tenth switch valve regulating valve, the second regulating valve and the fourth regulating valve, wherein the second regulating valve and the fourth regulating valve are adjusted within their own adjustment range (such as adjusting the valve opening to 0% to 100%) to meet the adjustment of the main gas flow and the supplementary gas flow pressure and flow.

[0375] Embodiment 9 (corresponding to the eighth scenario type)

[0376] When the gas pressure p of the gas storage tank is met, the operation starts. st,begin Equal to or lower than the first-stage expander inlet design pressure p e,in , and the calculated gas pressure p of the gas storage reservoir at the end of operation is st,end Equal to or lower than the first-stage expander inlet design pressure p e,in , and the target power generation duration is t e1 Less than the expected power generation time of the gas storage facility t e2 , indicating that the total gas storage capacity of the gas storage reservoir is abundant, but the pressure level is low, and the main gas and supplementary gas pipelines need to be directly opened to meet the power generation needs.

[0377] Furthermore, the system target response time t r1 The system response time t is respectively the same as that of the pure regulating valve control system r21 、System response time t using ejection regulation mode control r22 For comparison, when t r21 <t r1 <t r22 When the system is in operation, the pure regulating valve mode can be used for the main gas pipeline, and the induced regulating mode can be used for the supplementary gas source, so that the system can achieve the fastest system response and grid-connected power generation in the initial stage of operation.

[0378] Specific operation: adjust the main gas flow regulating valve, and use the ejector to adjust the supplementary gas flow. In this stage, it is necessary to open the gas-water heat exchangers 1 to 4, the first to the tenth switch valves, the second regulating valve and the third regulating valve, so that the second regulating valve and the second ejector are kept in working state. The second regulating valve and the third regulating valve can be adjusted within their own adjustment range (such as adjusting the valve opening to 0% to 100%), so as to adjust the pressure and flow of the main gas flow and the gas storage to the second ejector. The ejection gas flow of the second ejector can select any one of the first-stage, second-stage, and third-stage expanders, and the corresponding opened regulating valves are the eighth, ninth, and tenth regulating valves. In order to maximize the use of the gas work capacity, only one of the eighth, ninth, and tenth regulating valves is opened at the same time (such as the three can adopt the opening order of the tenth, ninth, and eighth regulating valves), and each valve can be adjusted within its own adjustment range (such as adjusting the valve opening to 0% to 100%), so as to adjust the parameters of the supplementary gas flow by adjusting the ejection gas source.

[0379] When selecting the induced gas source, it is recommended that the induced gas source of the air supply pipeline adopt the exhaust gas of the second and third stage expanders, and the exhaust gas of the third stage expander is more recommended as the induced gas source.

[0380] Embodiment 10 (corresponding to the fourth scenario type)

[0381] When the gas pressure p of the gas storage tank is met, the operation starts. st,begin Equal to or lower than the first-stage expander inlet design pressure p e,in , and the calculated gas pressure p of the gas storage reservoir at the end of operation is st,end Equal to or lower than the first-stage expander inlet design pressure p e,in , and the target power generation duration is t e1 Less than the expected power generation time of the gas storage facility t e2 , indicating that the total gas storage capacity of the gas storage reservoir is abundant, but the pressure level is low, and the main gas and supplementary gas pipelines need to be directly opened to meet the power generation needs.

[0382] Furthermore, the system target response time t r1 The system response time t is respectively the same as that of the pure regulating valve control system r21 、System response time t using ejection regulation mode control r22 For comparison, when t r1 >t r22 When the main gas pipeline and the supplementary gas pipeline are in the state of being in short supply, the ejection regulation mode control is required to achieve system response and grid-connected power generation.

[0383] Specific operation: Both the main gas flow and the supplementary gas flow are regulated by ejection. In this stage, the gas-water heat exchangers 1 to 4, the first to tenth switch valves, the first regulating valve and the third regulating valve need to be opened continuously to keep the first ejector and the second ejector in working state. The first regulating valve and the third regulating valve are adjusted within their own adjustment range (such as adjusting the valve opening to 0% to 100%) to meet the pressure and flow adjustment of the gas storage to the first ejector and the second ejector. After technical and economic comparison, the ejection gas flow of the first ejector can select any one of the first, second and third stage expanders, and the corresponding opened regulating valves are the fifth, seventh and ninth regulating valves respectively. It is recommended that the ejection gas source of the main gas pipeline adopt the exhaust gas of the first and second stage expanders, and the exhaust gas of the second stage expander is more recommended as the ejection gas source. In order to maximize the working capacity of the gas, only one of the fifth, sixth and seventh regulating valves is opened at the same time (such as the opening sequence of the seventh, sixth and fifth regulating valves can be adopted), and each valve can be adjusted within its own adjustment range (such as adjusting the valve opening to 0% to 100%), so as to achieve the adjustment of the main gas flow parameters by adjusting the ejection gas source. The ejection gas flow of the second ejector can select any one of the first-stage, second-stage and third-stage expanders, and the corresponding opened regulating valves are the eighth, ninth and tenth regulating valves. In order to maximize the working capacity of the gas, only one of the eighth, ninth and tenth regulating valves is opened at the same time (such as the opening sequence of the tenth, ninth and eighth regulating valves can be adopted), and each valve can be adjusted within its own adjustment range (such as adjusting the valve opening to 0% to 100%), so as to achieve the adjustment of the supplementary gas flow parameters by adjusting the ejection gas source.

[0384] When selecting the induced gas source, it is recommended that the induced gas source of the main gas pipeline adopt the exhaust gas of the first-stage and second-stage expanders, and the exhaust gas of the second-stage expander is more recommended as the induced gas source; it is recommended that the induced gas source of the air supply pipeline adopt the exhaust gas of the second-stage and third-stage expanders, and the exhaust gas of the third-stage expander is more recommended as the induced gas source.

[0385] Embodiment 11 (corresponding to the ninth scene type)

[0386] When the gas pressure p of the gas storage tank is met, the operation starts. st,begin Equal to or lower than the first-stage expander inlet design pressure p e,in , and the calculated gas pressure p of the gas storage reservoir at the end of operation is st,end Equal to or lower than the first-stage expander inlet design pressure p e,in , and the target power generation duration is t e1 Greater than the expected power generation time of the gas storage facility t e2 , indicating that the total gas storage capacity of the gas storage reservoir is not abundant and the pressure level is low, and the main gas and supplementary gas pipelines need to be directly opened to meet the power generation needs.

[0387] Furthermore, the system target response time t r1 The system response time t is respectively the same as that of the pure regulating valve control system r21 、System response time t using ejection regulation mode control r22 For comparison, when t r21 <t r1 <t r22 When the system is in operation, the pure regulating valve mode can be used for the main gas pipeline, and the induced gas regulating mode can be used for the supplementary gas source, so that the system can achieve the fastest system response and grid-connected power generation in the initial stage of operation. This method can recover part of the gas volume through induced gas to extend the power generation time as much as possible under the premise of ensuring fast response time.

[0388] Specific operation: adjust the main gas flow regulating valve, and use the ejector to adjust the supplementary gas flow. In this stage, it is necessary to open the gas-water heat exchangers 1 to 4, the first to tenth switch valves, the second regulating valve and the third regulating valve, so that the second regulating valve and the second ejector remain in working state. The second regulating valve can be adjusted within its own adjustment range (such as adjusting the valve opening to 0% to 100%), so as to adjust the main gas flow parameters. Among them, the third regulating valve is adjusted within its own adjustment range (such as adjusting the valve opening to 0% to 100%) to meet the pressure and flow adjustment of the gas storage to the second ejector gas flow. The ejection gas flow of the second ejector can select any one of the first-stage, second-stage, and third-stage expanders, and the corresponding opened regulating valves are the eighth, ninth, and tenth regulating valves. In order to maximize the use of the working capacity of the gas, only one of the eighth, ninth and tenth regulating valves is opened at the same time (for example, the three can adopt the opening sequence of the tenth, ninth and eighth regulating valves), and each valve can be adjusted within its own adjustment range (such as adjusting the valve opening to 0% to 100%), so as to achieve the adjustment of the air supply air flow parameters by adjusting the induced air source.

[0389] When selecting the induced gas source, it is recommended that the induced gas source of the air supply pipeline adopt the exhaust gas of the second and third stage expanders, and the exhaust gas of the third stage expander is more recommended as the induced gas source.

[0390] Example 12 (corresponding to the tenth scenario type)

[0391] When the gas pressure p of the gas storage tank is met, the operation starts. st,begin Equal to or lower than the first-stage expander inlet design pressure p e,in , and the calculated gas pressure p of the gas storage reservoir at the end of operation is st,end Equal to or lower than the first-stage expander inlet design pressure p e,in , and the target power generation duration is t e1 Greater than the expected power generation time of the gas storage facility t e2, indicating that the total gas storage capacity of the gas storage reservoir is not abundant and the pressure level is low, and the main gas and supplementary gas pipelines need to be directly opened to meet the power generation needs.

[0392] Furthermore, the system target response time t r1 The system response time t is respectively the same as that of the pure regulating valve control system r21 、System response time t using ejection regulation mode control r22 For comparison, when t r1 >t r22 When the main gas pipeline and the supplementary gas pipeline are in the state of being in short supply, the ejection regulation mode control is required to achieve system response and grid-connected power generation.

[0393] Specific operation: Both the main gas flow and the supplementary gas flow are regulated by ejection. In this stage, the gas-water heat exchangers 1 to 4, the first to tenth switch valves, the first regulating valve and the third regulating valve need to be opened continuously to keep the first ejector and the second ejector in working state. The first regulating valve and the third regulating valve are adjusted within their own adjustment range (such as adjusting the valve opening to 0% to 100%) to meet the pressure and flow adjustment of the gas storage to the first ejector and the second ejector. After technical and economic comparison, the ejection gas flow of the first ejector can select any one of the first, second and third stage expanders, and the corresponding opened regulating valves are the fifth, sixth and seventh regulating valves respectively. It is recommended that the ejection gas source of the main gas pipeline adopt the exhaust gas of the first and second stage expanders, and the exhaust gas of the second stage expander is more recommended as the ejection gas source. In order to maximize the working capacity of the gas, only one of the fifth, sixth and seventh regulating valves is opened at the same time (such as the opening sequence of the seventh, sixth and fifth regulating valves can be adopted), and each valve can be adjusted within its own adjustment range (such as adjusting the valve opening to 0% to 100%), so as to achieve the adjustment of the main gas flow parameters by adjusting the ejection gas source. The ejection gas flow of the second ejector can select any one of the first-stage, second-stage and third-stage expanders, and the corresponding opened regulating valves are the sixth, eighth and tenth regulating valves. In order to maximize the working capacity of the gas, only one of the eighth, ninth and tenth regulating valves is opened at the same time (such as the opening sequence of the tenth, ninth and eighth regulating valves can be adopted), and each valve can be adjusted within its own adjustment range (such as adjusting the valve opening to 0% to 100%), so as to achieve the adjustment of the supplementary gas flow parameters by adjusting the ejection gas source.

[0394] When selecting the induced gas source, it is recommended that the induced gas source of the main gas pipeline adopt the exhaust gas of the first-stage and second-stage expanders, and the exhaust gas of the second-stage expander is more recommended as the induced gas source; it is recommended that the induced gas source of the air supply pipeline adopt the exhaust gas of the second-stage and third-stage expanders, and the exhaust gas of the third-stage expander is more recommended as the induced gas source.

[0395] The above scenario examples verify that the operation and regulation method of the compressed air energy storage system provided in this specification can effectively entrain part of the low-pressure gas while throttling and reducing the pressure of the high-pressure gas in the gas ejector by utilizing the entrainment effect of the low-pressure gas. It can also convert part of the throttling loss of the main gas flow into the work capacity of the entrained gas flow, and increase the gas mass flow rate at the outlet of the ejector, which helps to improve the gas flow rate and work capacity at the inlet of the expander. This regulation method takes into account the advantages of both gas replenishment operation and throttling operation, and effectively recovers the work capacity of exhaust gas at each stage of the expander. The various combinations of gas ejectors and regulating valves make the system highly adaptable in all operating ranges.

[0396] Although the present specification provides method operation steps as described in the embodiments or flow charts, more or less operation steps may be included based on conventional or non-creative means. The order of steps listed in the embodiments is only one way of executing the order of many steps, and does not represent a unique execution order. When the device or client product in practice is executed, it can be executed in sequence or in parallel according to the method shown in the embodiments or the drawings (for example, a parallel processor or a multi-threaded processing environment, or even a distributed data processing environment). The term "include", "include" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, product or device including a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such a process, method, product or device. In the absence of more restrictions, it is not excluded that there are other identical or equivalent elements in the process, method, product or device including the elements. The first, second, etc. words are used to represent the name, and do not represent any particular order.

[0397] Those skilled in the art also know that, in addition to implementing the controller in a purely computer-readable program code, the controller can be made to implement the same function in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, such a controller can be considered as a hardware component, and the devices for implementing various functions included therein can also be considered as structures within the hardware component. Or even, the devices for implementing various functions can be considered as both software modules for implementing the method and structures within the hardware component.

[0398] This specification may be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, classes, etc. that perform specific tasks or implement specific abstract data types. This specification may also be practiced in distributed computing environments where tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules may be located in local and remote computer-readable storage media including storage devices.

[0399] Through the description of the above embodiments, it can be known that those skilled in the art can clearly understand that the present specification can be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present specification can essentially be embodied in the form of a software product, which can be stored in a storage medium such as ROM / RAM, a disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a mobile terminal, a server, or a network device, etc.) to execute the methods described in each embodiment of the present specification or some parts of the embodiments.

[0400] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. This specification can be used in many general or special computer system environments or configurations. For example: personal computers, server computers, handheld devices or portable devices, tablet devices, multi-processor systems, microprocessor-based systems, set-top boxes, programmable electronic devices, network PCs, minicomputers, mainframe computers, distributed computing environments including any of the above systems or devices, etc.

[0401] Although the present specification is described through embodiments, those skilled in the art will appreciate that there are many modifications and changes to the present specification without departing from the spirit of the present specification, and it is intended that the appended claims include these modifications and changes without departing from the spirit of the present specification.

Claims

1. A method for adjusting the operation of a compressed air energy storage system, characterized in that: Applied to a compressed air energy storage system, wherein the expansion section of the compressed air energy storage system at least includes: a main gas regulating module and a supplementary gas regulating module; wherein the main gas regulating module is arranged in the main gas pipeline between the first gas-water heat exchanger and the gas storage equipment, and the supplementary gas regulating module is arranged in the supplementary gas pipeline between the first-stage expander and the gas storage equipment; the main gas regulating module includes: a first main gas regulating branch and a second main gas regulating branch; the first main gas regulating branch is at least connected to a first ejector; the ejection fluid interface of the first ejector is at least connected to the exhaust port of the first-stage expander and the exhaust port of the second-stage expander; the supplementary gas regulating module includes: a first supplementary gas regulating branch and a second supplementary gas regulating branch; the first supplementary gas regulating branch is at least connected to a second ejector; the ejection fluid interface of the second ejector is at least connected to the exhaust port of the second-stage expander and the exhaust port of the third-stage expander; the second main gas regulating branch and the second supplementary gas regulating branch are respectively connected to corresponding regulating valves; the method includes: Obtain target grid-connected parameters, target initial parameters, and target reference parameters of the compressed air energy storage system; wherein the target grid-connected parameters include: target power generation, target response time, target power generation time, and the target initial parameters include: the initial value of the total amount of gas in the gas storage equipment, and the initial value of the gas pressure in the gas storage equipment; the target reference parameters include: the pressure design value of the air inlet of the first-stage expander, the first response time based on the regulating valve mode, and the second response time based on the ejector mode; According to the target grid connection parameters and the target initial parameters, the target prediction parameters of the compressed air energy storage system for expansion power generation are determined; wherein the target prediction parameters include: the predicted value of power generation duration, and the predicted value of the gas pressure in the gas storage equipment when power generation ends; Determine the operation scenario type of expansion power generation of the compressed air energy storage system according to the target grid-connected parameters, the target initial parameters, the target reference parameters, and the target prediction parameters; According to the operation scenario type of the expansion power generation of the compressed air energy storage system, a matching target regulation rule is determined from a preset regulation rule set; According to the target regulation rule, during the expansion and power generation process of the compressed air energy storage system, the main air regulation module and / or the supplementary air regulation module of the expansion section are adjusted accordingly.

2. The method according to claim 1, characterized in that The first main gas regulating branch is connected to a first regulating valve, the second main gas regulating branch is connected to a second regulating valve, the first supplementary gas regulating branch is connected to a third regulating valve, the second supplementary gas regulating branch is connected to a fourth regulating valve, a first switch valve is further provided on the main gas pipeline between the gas storage equipment and the main gas regulating module, and a second switch valve is further provided on the supplementary gas pipeline between the gas storage equipment and the supplementary gas regulating module; the method further comprises: When the initial value of the gas pressure in the gas storage equipment is greater than the pressure design value of the air inlet of the first-stage expander, the predicted value of the gas pressure in the gas storage equipment at the end of power generation is greater than the pressure design value of the air inlet of the first-stage expander, the predicted value of the power generation time is greater than the target power generation time, and the target response time is greater than the first response time and less than the second response time, it is determined that the operation scenario type of the expansion power generation of the compressed air energy storage system is the first scenario type; Accordingly, according to the target regulation rule, during the expansion and power generation process of the compressed air energy storage system, the main air regulation module and / or the supplementary air regulation module of the expansion section are regulated accordingly, including: Control the first switch valve to open and the second switch valve to close; The opening of the first regulating valve is adjusted to 0, and the opening of the second regulating valve is adjusted to a matching first initial opening, so as to deliver gas to the first-stage expander through the second main gas regulating branch; During the expansion power generation process, the opening of the second regulating valve is dynamically adjusted according to the gas pressure in the gas storage equipment so that the gas pressure at the air inlet of the first-stage expander meets the preset working condition requirements.

3. The method according to claim 2, characterized in that The method further comprises: When the initial value of the gas pressure in the gas storage equipment is greater than the pressure design value of the air inlet of the first-stage expander, the predicted value of the gas pressure in the gas storage equipment at the end of power generation is greater than the pressure design value of the air inlet of the first-stage expander, the predicted value of the power generation time is greater than the target power generation time, and the target response time is greater than the second response time, it is determined that the operation scenario type of the expansion power generation of the compressed air energy storage system is the second scenario type; Accordingly, according to the target regulation rule, during the expansion and power generation process of the compressed air energy storage system, the main air regulation module and / or the supplementary air regulation module of the expansion section are regulated accordingly, including: Control the first switch valve to open and the second switch valve to close; The opening of the second regulating valve is adjusted to 0, and the opening of the first regulating valve is adjusted to a matching second initial opening; At least one of the pipelines between the ejection fluid interface of the first ejector and the exhaust port of the first-stage expander and the pipelines between the ejection fluid interface of the first ejector and the exhaust port of the second-stage expander is connected to introduce the exhaust gas of the first-stage expander and / or the exhaust gas of the second-stage expander as the ejection fluid to regulate the gas delivered by the first main gas regulating branch to the first-stage expander; During the expansion power generation process, the opening of the first regulating valve is dynamically adjusted according to the gas pressure in the gas storage equipment so that the gas pressure at the air inlet of the first-stage expander meets the preset working condition requirements.

4. The method according to claim 3, characterized in that A corresponding auxiliary regulating valve is respectively provided on the pipeline between the ejection fluid interface of the first ejector and the exhaust port of the first-stage expander, and on the pipeline between the ejection fluid interface of the first ejector and the exhaust port of the second-stage expander; Accordingly, the method further includes: During the expansion power generation process, the opening of the first regulating valve and / or the opening of the corresponding auxiliary regulating valve is dynamically adjusted according to the gas pressure in the gas storage equipment so that the gas pressure at the air inlet of the first-stage expander meets the preset operating conditions.

5. The method according to claim 3, characterized in that: A buffer container is provided at the intersection of the first main gas regulating branch and the second main gas regulating branch near the first-stage expander; wherein the buffer container is connected to the air inlet of the first-stage expander through a pipeline through the first gas-water heat exchanger; Accordingly, the method further includes: During the expansion power generation process, the opening of the first regulating valve and the opening of the second regulating valve are jointly adjusted according to the gas pressure in the gas storage equipment, so as to respectively deliver the corresponding gas to the buffer container through the first main gas regulating branch and the second main gas regulating branch; and the buffer container is used to buffer and mix the gas so that the gas pressure at the air inlet of the first-stage expander meets the preset operating conditions.

6. The method according to claim 2, characterized in that The method further comprises: When the initial value of the gas pressure in the gas storage equipment is greater than the pressure design value of the air inlet of the first-stage expander, the predicted value of the gas pressure in the gas storage equipment when power generation ends is less than or equal to the pressure design value of the air inlet of the first-stage expander, the predicted value of the power generation time is greater than the target power generation time, and the target response time is greater than the first response time and less than the second response time, it is determined that the operation scenario type of the expansion power generation of the compressed air energy storage system is the third scenario type; Accordingly, according to the target regulation rule, during the expansion and power generation process of the compressed air energy storage system, the main air regulation module and / or the supplementary air regulation module of the expansion section are regulated accordingly, including: Control the first switch valve to open and the second switch valve to close; The opening of the first regulating valve is adjusted to 0, and the opening of the second regulating valve is adjusted to a matching third initial opening, so as to deliver gas to the first-stage expander through the second main gas regulating branch; During the expansion power generation process, the opening of the second regulating valve is dynamically adjusted according to the gas pressure in the gas storage equipment so that the gas pressure at the air inlet of the first-stage expander meets the preset working condition requirements; When the detected gas pressure in the gas storage equipment is less than or equal to the pressure design value of the gas inlet of the first-stage expander, the second switch valve is controlled to open; The opening of the third regulating valve is adjusted to 0, and the opening of the fourth regulating valve is adjusted to a matching opening, so as to deliver gas to the first-stage expander through the second gas replenishment regulating branch for gas replenishment regulation; During the expansion power generation process, the opening of the second regulating valve and the opening of the fourth regulating valve are jointly adjusted according to the gas pressure in the gas storage equipment so that the gas pressure at the air inlet of the first-stage expander meets the preset operating conditions.

7. The method according to claim 6, characterized in that A gas pressure sensor is also provided on the pipeline between the gas supply regulating module and the first-stage expander; wherein the gas pressure sensor is used to collect the pressure of the gas output by the gas supply regulating module; Accordingly, the method further includes: According to the pressure of the gas output by the gas supply regulating module, the access position of the gas output by the gas supply regulating module on the first-stage expander is adjusted.

8. The method according to claim 6, characterized in that After controlling the second switch valve to open, the method further includes: Adjust the opening of the fourth regulating valve to 0, and adjust the opening of the third regulating valve to a matching opening; At least one of the pipelines between the ejection fluid interface of the second ejector and the exhaust port of the third-stage expander and the pipelines between the ejection fluid interface of the second ejector and the exhaust port of the second-stage expander is connected to introduce the exhaust of the third-stage expander and / or the exhaust of the second-stage expander as ejection fluid to regulate the gas transported by the first gas supplement regulating branch to the first-stage expander; During the expansion power generation process, the opening of the second regulating valve and the opening of the third regulating valve are jointly adjusted according to the gas pressure in the gas storage equipment so that the gas pressure at the air inlet of the first-stage expander meets the preset operating conditions.

9. The method according to claim 2, characterized in that: The method further comprises: When the initial value of the gas pressure in the gas storage equipment is less than or equal to the pressure design value of the air inlet of the first-stage expander, the predicted value of the gas pressure in the gas storage equipment when power generation ends is less than or equal to the pressure design value of the air inlet of the first-stage expander, and the predicted value of the power generation duration is greater than the second response duration, it is determined that the operation scenario type of the expansion power generation of the compressed air energy storage system is the fourth scenario type; Accordingly, according to the target regulation rule, during the expansion and power generation process of the compressed air energy storage system, the main air regulation module and / or the supplementary air regulation module of the expansion section are regulated accordingly, including: Controlling the first switch valve and the second switch valve to open; Adjust the opening of the second regulating valve to 0, and adjust the opening of the first regulating valve to a matching opening; at the same time, adjust the opening of the fourth regulating valve to 0, and adjust the opening of the third regulating valve to a matching opening; At least one of the pipelines between the ejection fluid interface of the first ejector and the exhaust port of the first-stage expander and the pipelines between the ejection fluid interface of the first ejector and the exhaust port of the second-stage expander is connected; at the same time, at least one of the pipelines between the ejection fluid interface of the second ejector and the exhaust port of the third-stage expander and the pipelines between the ejection fluid interface of the third ejector and the exhaust port of the second-stage expander is connected; During the expansion power generation process, the opening of the first regulating valve and the opening of the third regulating valve are jointly adjusted according to the gas pressure in the gas storage equipment so that the gas pressure at the air inlet of the first-stage expander meets the preset working condition requirements.

10. An operation regulating device for a compressed air energy storage system, characterized in that: Applied to a compressed air energy storage system, wherein the expansion section of the compressed air energy storage system at least includes: a main gas regulating module and a supplementary gas regulating module; wherein the main gas regulating module is arranged in the main gas pipeline between the first gas-water heat exchanger and the gas storage equipment, and the supplementary gas regulating module is arranged in the supplementary gas pipeline between the first-stage expander and the gas storage equipment; the main gas regulating module includes: a first main gas regulating branch and a second main gas regulating branch; the first main gas regulating branch is at least connected to a first ejector; the ejection fluid interface of the first ejector is at least connected to the exhaust port of the first-stage expander and the exhaust port of the second-stage expander; the supplementary gas regulating module includes: a first supplementary gas regulating branch and a second supplementary gas regulating branch; the first supplementary gas regulating branch is at least connected to a second ejector; the ejection fluid interface of the second ejector is at least connected to the exhaust port of the second-stage expander and the exhaust port of the third-stage expander; the second main gas regulating branch and the second supplementary gas regulating branch are respectively connected to corresponding regulating valves; the device includes: An acquisition module is used to acquire target grid-connected parameters, target initial parameters, and target reference parameters of a compressed air energy storage system; wherein the target grid-connected parameters include: target power generation, target response time, target power generation time, and the target initial parameters include: the initial value of the total amount of gas in the gas storage equipment and the initial value of the gas pressure in the gas storage equipment; the target reference parameters include: the pressure design value of the air inlet of the first-stage expander, the first response time based on the regulating valve mode, and the second response time based on the ejector mode; The first determination module is used to determine the target prediction parameters of the compressed air energy storage system for expansion power generation according to the target grid-connected parameters and the target initial parameters; wherein the target prediction parameters include: the predicted value of power generation time and the predicted value of the gas pressure in the gas storage equipment when power generation ends; The second determination module is used to determine the operation scenario type of expansion power generation of the compressed air energy storage system according to the target grid-connected parameters, the target initial parameters, the target reference parameters, and the target prediction parameters; A third determination module is used to determine a matching target regulation rule from a preset regulation rule set according to the operation scenario type of expansion power generation of the compressed air energy storage system; The regulating module is used to adjust the main air regulating module and / or the supplementary air regulating module of the expansion section accordingly during the expansion and power generation process of the compressed air energy storage system according to the target regulating rules.

11. A computer device, characterized in that: The method comprises a processor and a memory for storing processor-executable instructions, wherein the processor implements the steps of the method according to any one of claims 1 to 9 when executing the instructions.

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

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