A compressed air energy storage system and method of controlling the same

Abstract

The application discloses a compressed air energy storage system and a control method thereof, and relates to the technical field of compressed air energy storage, the system comprising: a control module, an information detection module, an adjusting module, a gas storage and a compressor module; the control module is used for collecting initial operation parameters of the compressed air energy storage system through the information detection module when the compressed air energy storage system is running, determining a to-be-adjusted module and target operation parameters of the compressed air energy storage system according to the initial operation parameters, and controlling the to-be-adjusted module to run based on the target operation parameters; the initial operation parameters comprise an ambient temperature of the compressed air energy storage system, a gas storage temperature and a gas storage pressure of the gas storage, the to-be-adjusted module comprises the compressor module and the adjusting module, and the target operation parameters are used for reducing energy loss of the compressed air energy storage system. The application can adjust the operation parameters of each device in the system according to the operation information of the energy storage system, and then improve the energy conversion efficiency of the system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressed air energy storage, in particular to a compressed air energy storage system and a control method thereof. BACKGROUND

[0002] Compressed air energy storage (CAES) is a kind of energy storage technology that uses the excess power during the low valley of power system load to compress air and store, and releases high pressure air to generate power during the peak of power system load. It has the advantages of large energy storage capacity, long energy storage period, small investment, etc., and is considered as one of the large-scale energy storage technologies with broad development prospects.

[0003] The compressed air energy storage system is an integration of air compression system and air turbine power generation, which realizes energy storage and conversion by combining heat storage. The system includes compression, turbine power generation, heat storage, heat exchange, gas storage and other subsystems. During charging, the motor drives the compressor to compress air and transmit the compressed air to the gas storage, the outlet of each stage of compressor is provided with a final cooler to transfer the heat energy of high temperature air to the heat storage medium and store in the heat tank, and the inlet of each stage of compressor is provided with a water cooler to reduce the temperature of the compressor inlet. During discharging, the high pressure air discharged from the gas storage transmits the heat in the heat storage medium to the air through the turbine inlet heater, and the high temperature and high pressure air passes through the turbine to expand and do work.

[0004] However, during the process of converting electric energy into potential energy and heat energy, there is energy loss in fluid and mechanical equipment, and during the process of converting potential energy and heat energy into electric energy, there is energy loss in fluid and mechanical equipment, and the electric-electric conversion efficiency is low. Therefore, it is a problem in the field of new energy and power that to design a compressed air energy storage system with low energy loss and high electric-electric conversion efficiency. SUMMARY

[0005] The present application provides a compressed air energy storage system and a control method thereof, which can adjust the operating parameters of each device in the system according to the operating information of the energy storage system, reduce the energy loss of fluid and mechanical equipment in the charging and discharging process of the system, and improve the energy conversion efficiency of the system.

[0006] According to one aspect of the present application, a compressed air energy storage system is provided, which comprises a control module, an information detection module, an adjustment module, a gas storage and a compressor module, wherein the control module is connected with the information detection module, the adjustment module and the compressor module respectively, the gas storage is connected with the compressor module and the information detection module respectively, and the gas storage is used for storing gas energy.

[0007] The control module is configured to, when the compressed air energy storage system is running, collect initial operation parameters of the compressed air energy storage system through the information detection module, determine a to-be-adjusted module of the compressed air energy storage system and target operation parameters according to the initial operation parameters, and control the to-be-adjusted module to run based on the target operation parameters; wherein the compressed air energy storage system runs in a potential energy storage mode or a potential energy release mode, the potential energy storage can be understood as transferring air potential energy to the gas storage library for storage, and the potential energy release can be understood as transferring the stored air potential energy in the gas storage library to the outside for use. The initial operation parameters include an ambient temperature of the compressed air energy storage system, a gas library temperature and a gas library pressure of the gas storage library, the to-be-adjusted module includes a compressor module and an adjustment module, and the target operation parameters are used to reduce energy loss of the compressed air energy storage system.

[0008] Optionally, the information detection module includes an ambient temperature detection unit, a gas library pressure detection unit and a gas library temperature detection unit; wherein the ambient temperature detection unit is arranged at an inlet end of the compressor module and is configured to determine the ambient temperature; the gas library pressure detection unit is arranged at an air energy inlet end or an air energy outlet end of the gas storage library and is configured to determine the gas library pressure; and the gas library temperature detection unit is arranged at the air energy inlet end or the air energy outlet end of the gas storage library and is configured to determine the gas library temperature.

[0009] Optionally, the compressor module includes a first-stage compressor, an intermediate-stage compressor and a last-stage compressor, and the adjustment module includes a first circulating water cooling adjustment valve, a second circulating water cooling adjustment valve and a third circulating water cooling adjustment valve; wherein a first end of the first circulating water cooling adjustment valve is connected to the control module, a second end of the first circulating water cooling adjustment valve is connected to the energy storage auxiliary device, a first end of the second circulating water cooling adjustment valve is connected to the control module, a second end of the second circulating water cooling adjustment valve is connected to the energy storage auxiliary device, a first end of the third circulating water cooling adjustment valve is connected to the control module, and a second end of the third circulating water cooling adjustment valve is connected to the energy storage auxiliary device.

[0010] Optionally, the energy storage auxiliary device comprises a cold tank, a hot tank, a first final cooler, a second final cooler, a first water cooler, a second water cooler, a third water cooler and a throttle valve; wherein the hot tank is connected with the first end of the first final cooler and the first end of the second final cooler respectively, the cold tank is connected with the second end of the first final cooler and the second end of the second final cooler respectively, the third end of the first final cooler is connected with the outlet end of the first-stage compressor, the inlet end of the first-stage compressor is connected with the ambient temperature detection unit and the control module respectively, the fourth end of the first final cooler is connected with the third end of the first water cooler, the first end of the first water cooler is connected with the second end of the first circulating water cooling regulating valve, the second end of the first water cooler is connected with the inlet end of the intermediate-stage compressor, the third end of the second final cooler is connected with the outlet end of the intermediate-stage compressor, the fourth end of the second final cooler is connected with the third end of the second water cooler, the first end of the second water cooler is connected with the second end of the second circulating water cooling regulating valve, the second end of the second water cooler is connected with the inlet end of the last-stage compressor, the outlet end of the last-stage compressor is connected with the first end of the third water cooler, the second end of the third water cooler is connected with the second end of the third circulating water cooling regulating valve, and the third end of the third water cooler is connected with the gas storage through the throttle valve, and the throttle valve is used for adjusting the outlet pressure of the compressed air energy storage system.

[0011] Optionally, the control module comprises a first controller and a second controller; wherein the first controller is connected with the ambient temperature detection unit, the inlet end of the first-stage compressor, the inlet end of the intermediate-stage compressor, the inlet end of the last-stage compressor, the first circulating water cooling regulating valve and the gas storage pressure detection unit respectively; and the second controller is connected with the second circulating water cooling regulating valve, the third circulating water cooling regulating valve, the gas storage pressure detection unit and the gas storage temperature detection unit respectively.

[0012] Optionally, the first controller is specifically used for: determining the control parameters of the first-stage compressor, the intermediate-stage compressor, the last-stage compressor and the first circulating water cooling regulating valve based on the ambient temperature obtained by the ambient temperature detection unit and the gas storage pressure obtained by the gas storage pressure detection unit, and controlling the first-stage compressor, the intermediate-stage compressor, the last-stage compressor and the first circulating water cooling regulating valve to operate based on the respective control parameters; and the second controller is specifically used for: determining the control parameters of the second circulating water cooling regulating valve and the third circulating water cooling regulating valve based on the gas storage temperature obtained by the gas storage temperature detection unit and the gas storage pressure obtained by the gas storage pressure detection unit, and controlling the second circulating water cooling regulating valve and the third circulating water cooling regulating valve to operate based on the respective control parameters.

[0013] According to another aspect of the present application, a control method of a compressed air energy storage system is provided, which is applied to the control module of the compressed air energy storage system provided in any of the embodiments of the present application, and the method comprises:

[0014] obtaining the ambient temperature of the compressed air energy storage system, the gas storage temperature and the gas storage pressure of the gas storage by using the information detection module;

[0015] The environment temperature, the gas reservoir temperature and the gas reservoir pressure are processed by using the preset parameter processing rule to obtain the first operation parameter of the adjustment module and the second operation parameter of the compressor module.

[0016] The adjustment module is controlled to operate based on the first operation parameter, and the compressor module is controlled to operate based on the second operation parameter, so as to reduce the energy loss of the compressed air energy storage system.

[0017] Optionally, the parameter processing rule includes a first type of parameter processing rule and a second type of parameter processing rule, the first operation parameter includes a third operation parameter and a fourth operation parameter, and the environment temperature, the gas reservoir temperature and the gas reservoir pressure are processed by using the preset parameter processing rule to obtain the first operation parameter of the adjustment module and the second operation parameter of the compressor module, including: the environment temperature and the gas reservoir pressure are processed by using the first type of parameter processing rule to obtain the second operation parameter and the third operation parameter; and the gas reservoir temperature and the gas reservoir pressure are processed by using the second type of parameter processing rule to obtain the fourth operation parameter.

[0018] Optionally, the first type of parameter processing rule includes a first-stage compressor inlet guide vane opening degree value calculation rule, a middle-stage compressor inlet guide vane opening degree value calculation rule, a last-stage compressor rotating speed value calculation rule and a first circulating cooling water adjustment valve opening degree value calculation rule; when the adjustment module includes a first circulating water cooling adjustment valve and the compressor module includes a first-stage compressor, a middle-stage compressor and a last-stage compressor, the environment temperature and the gas reservoir pressure are processed by using the first type of parameter processing rule to obtain the second operation parameter and the third operation parameter, including: the environment temperature and the gas reservoir pressure are processed by using the first-stage compressor inlet guide vane opening degree value calculation rule to obtain a first-stage compressor opening degree value coefficient, and the inlet guide vane opening degree of the first-stage compressor is determined according to the first-stage compressor opening degree value coefficient and an opening degree design value; the environment temperature and the gas reservoir pressure are processed by using the middle-stage compressor inlet guide vane opening degree value calculation rule to obtain a middle-stage compressor opening degree value coefficient, and the inlet guide vane opening degree of the middle-stage compressor is determined according to the middle-stage compressor opening degree value coefficient and an opening degree design value; the environment temperature and the gas reservoir pressure are processed by using the last-stage compressor rotating speed value calculation rule to obtain a last-stage compressor rotating speed value coefficient, and the rotating speed information of the last-stage compressor is determined according to the last-stage compressor rotating speed value coefficient and a rotating speed value design value; and the environment temperature and the gas reservoir pressure are processed by using the first circulating cooling water adjustment valve opening degree value calculation rule to obtain a first circulating cooling water adjustment valve opening degree value coefficient, and the opening degree information of the first circulating cooling water adjustment valve is determined according to the first circulating cooling water adjustment valve opening degree value coefficient and an opening degree design value.

[0019] Optionally, the second type of parameter processing rules includes the calculation rules for the opening value of the second circulating cooling water regulating valve and the third circulating cooling water regulating valve. When the regulating module includes the second circulating water cooling regulating valve and the third circulating water cooling regulating valve, the second type of parameter processing rules are used to process the gas storage temperature and pressure to obtain the fourth operating parameter, including: using the calculation rules for the opening value of the second circulating cooling water regulating valve to process the gas storage temperature and pressure to obtain the opening value coefficient of the second circulating cooling water regulating valve, and determining the opening information of the second circulating cooling water regulating valve based on the opening value coefficient and the opening design value; using the calculation rules for the opening value of the third circulating cooling water regulating valve to process the gas storage temperature and pressure to obtain the opening value coefficient of the third circulating cooling water regulating valve, and determining the opening information of the third circulating cooling water regulating valve based on the opening value coefficient and the opening design value.

[0020] According to another aspect of the present invention, a control device for a compressed air energy storage system is provided, for implementing the control method of the compressed air energy storage system in any embodiment of the present invention, the device comprising:

[0021] The acquisition module is used to acquire the ambient temperature of the compressed air energy storage system, the gas temperature of the gas storage tank, and the gas pressure of the gas storage tank using the information detection module;

[0022] The determination module is used to process the ambient temperature, gas storage temperature and gas storage pressure using pre-set parameter processing rules to obtain the first operating parameters of the regulation module and the second operating parameters of the compressor module.

[0023] The control module is used to control the operation of the regulating module based on the first operating parameter and the operation of the compressor module based on the second operating parameter, so as to reduce the energy loss of the compressed air energy storage system.

[0024] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0025] At least one processor; and a memory communicatively connected to the at least one processor;

[0026] The memory stores a computer program that can be executed by at least one processor, which enables the at least one processor to execute the control method of the compressed air energy storage system in any embodiment of the present invention.

[0027] According to another aspect of the present invention, a computer-readable storage medium is provided that stores computer instructions for causing a processor to execute and implement the control method of the compressed air energy storage system in any embodiment of the present invention.

[0028] According to another aspect of the present invention, a computer program product is provided, comprising a computer program that, when executed by a processor, implements a control method for a compressed air energy storage system according to any embodiment of the present invention.

[0029] The compressed air energy storage system of the present invention includes: a control module, an information detection module, an adjustment module, an air storage tank, and a compressor module. The control module is connected to the information detection module, the adjustment module, and the compressor module, respectively. The air storage tank is connected to the compressor module and the information detection module, and is used to store gas energy. During operation, the control module collects the initial operating parameters of the compressed air energy storage system through the information detection module, determines the modules to be adjusted and the target operating parameters based on the initial operating parameters, and controls the modules to be adjusted to operate based on the target operating parameters. During operation, the air storage tank performs potential energy storage or potential energy release. The initial operating parameters include the ambient temperature of the compressed air energy storage system, the air storage tank temperature, and the air storage tank pressure. The modules to be adjusted include the compressor module and the adjustment module. The target operating parameters are used to reduce energy loss in the compressed air energy storage system. The compressed air energy storage system provided by this invention periodically acquires and processes the operating information of the energy storage system during operation, and analyzes the equipment in the system that needs parameter adjustment and its operating parameters, ensuring the real-time performance of the equipment operating parameters, thereby reducing energy loss in both fluid and mechanical equipment during the charging and discharging process of the system and improving the energy conversion efficiency of the system.

[0030] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in this invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of a compressed air energy storage system provided by the present invention;

[0033] Figure 2 This is a schematic diagram of another compressed air energy storage system provided by the present invention;

[0034] Figure 3 This is a flowchart illustrating a control method for a compressed air energy storage system provided by the present invention;

[0035] Figure 4 This is a schematic diagram of the structure of a control device for a compressed air energy storage system provided by the present invention;

[0036] Figure 5 This is a schematic diagram of the structure of an electronic device provided by the present invention.

[0037] Figure label:

[0038] 101-Control Module, 102-Information Detection Module, 103-Regulation Module, 104-Gas Storage Tank, 105-Compressor Module, 1-Ambient Temperature Detection Unit, 2-Gas Storage Pressure Detection Unit, 3-Gas Storage Temperature Detection Unit, 4-First-Stage Compressor, 5-Intermediate-Stage Compressor, 6-Final-Stage Compressor, 7-First Circulating Water-Cooling Regulating Valve, 8-Second Circulating Water-Cooling Regulating Valve, 9-Third Circulating Water-Cooling Regulating Valve, 10-First Water Cooler, 11-Second Water Cooler, 12-Third Water Cooler, 13-First Final Cooler, 14-Second Final Cooler, 15-Hot Tank, 16-Cold Tank, 17-Gas Storage Tank, 18-Throttle Valve, 19-First Processor, 20-Second Processor. Detailed Implementation

[0039] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort should fall within the scope of protection of the present invention.

[0040] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0041] Figure 1 This is a schematic diagram of a compressed air energy storage system provided by the present invention. This embodiment can be applied to improving the energy conversion efficiency of the compressed air energy storage system and improving the electro-electrical conversion efficiency of the system. (Refer to...) Figure 1The system specifically includes: a control module, an information detection module, an adjustment module, an air storage tank, and a compressor module. The control module is connected to the information detection module, the adjustment module, and the compressor module, while the air storage tank is connected to both the compressor module and the information detection module. The air storage tank is used to store gas energy. During operation, the control module collects the initial operating parameters of the compressed air energy storage system through the information detection module, determines the modules to be adjusted and the target operating parameters based on these initial parameters, and controls the modules to be adjusted to operate based on the target operating parameters. During operation, the air storage tank performs potential energy storage or release. The initial operating parameters include the ambient temperature of the compressed air energy storage system, the air storage tank temperature, and the air storage tank pressure. The modules to be adjusted include the compressor module and the adjustment module. The target operating parameters are used to reduce energy loss in the compressed air energy storage system.

[0042] In this system, "gas energy" can be understood as the potential energy of air. The control module can be understood as a computing unit with data processing capabilities, including but not limited to microprocessors, microcontrollers, and programmable logic controllers. The information detection module can be understood as components pre-deployed in the compressed air energy storage system to determine the system's operating parameters during operation, including but not limited to temperature sensors, humidity sensors, and pressure sensors. The regulation module can be understood as a device that adjusts the state of control valves and other components in the compressed air energy storage system. The compressor module can be understood as a device in the compressed air energy storage system that performs the gas energy compression operation. The operating states and modes of the compressed air energy storage system differ depending on the parameters of the regulation module and the compressor module. By adjusting the operating parameters of the compressor module and the regulation module, on the one hand, the operating parameters of the compressed air energy storage system can be matched with the ambient temperature and gas storage pressure, improving energy efficiency; on the other hand, the operating parameters of the compressed air energy storage system can be matched with the gas storage temperature and pressure, improving the safety of the gas storage facility.

[0043] Figure 2 This is a schematic diagram of another compressed air energy storage system provided by the present invention. Figure 2 Taking a three-stage compression and two-stage expansion system as an example, the connection relationships of each component are illustrated in detail. Specifically, the information detection module includes an ambient temperature detection unit, a gas storage pressure detection unit, and a gas storage temperature detection unit. The compressor module includes a first-stage compressor, an intermediate-stage compressor, and a final-stage compressor. The regulation module includes a first circulating water-cooled regulating valve, a second circulating water-cooled regulating valve, and a third circulating water-cooled regulating valve. The circulating water-cooled regulating valve refers to the circulating cooling water regulating valve in the compressed air energy storage system. The compressed air energy storage system also includes energy storage auxiliary equipment, including a cold tank, a hot tank, a first final cooler, a second final cooler, a first water cooler, a second water cooler, a third water cooler, and a throttle valve. The control module includes a first controller and a second controller. Figure 2In the diagram, 1 represents the ambient temperature detection unit, 2 represents the gas storage pressure detection unit, 3 represents the gas storage temperature detection unit, 4 represents the first-stage compressor, 5 represents the intermediate-stage compressor, 6 represents the final-stage compressor, 7 represents the first circulating water-cooled regulating valve, 8 represents the second circulating water-cooled regulating valve, 9 represents the third circulating water-cooled regulating valve, 10 represents the first water cooler, 11 represents the second water cooler, 12 represents the third water cooler, 13 represents the first final cooler, 14 represents the second final cooler, 15 represents the hot tank, 16 represents the cold tank, 17 represents the gas storage tank, 18 represents the throttle valve, 19 represents the first processor, and 20 represents the second processor. These components work together to complete the charging and discharging tasks of the compressed air energy storage system.

[0044] from Figure 2 As can be seen, the ambient temperature detection unit is deployed at the inlet end of the compressor module, the gas storage pressure detection unit is deployed at the gas energy inlet or outlet end of the gas storage, and the gas storage temperature detection unit is deployed at the gas energy inlet or outlet end of the gas storage. The first end of the first circulating water-cooled regulating valve is connected to the control module, and the second end of the first circulating water-cooled regulating valve is connected to the energy storage auxiliary equipment. The first end of the second circulating water-cooled regulating valve is connected to the control module, and the second end of the second circulating water-cooled regulating valve is connected to the energy storage auxiliary equipment. The first end of the third circulating water-cooled regulating valve is connected to the control module, and the second end of the third circulating water-cooled regulating valve is connected to the energy storage auxiliary equipment. The hot tank is connected to the first end of the first terminal cooler and the first end of the second terminal cooler, respectively. The cold tank is connected to the second end of the first terminal cooler and the second end of the second terminal cooler, respectively. The third end of the first terminal cooler is connected to the outlet end of the first stage compressor. The inlet end of the first stage compressor is connected to the ambient temperature detection unit and the control module, respectively. The fourth end of the first terminal cooler is connected to the third end of the first water cooler. The first end of the first water cooler is connected to the second end of the first circulating water cooling regulating valve. The second end of the first water cooler is connected to the inlet end of the intermediate stage compressor. The third end of the second terminal cooler is connected to the outlet end of the intermediate stage compressor. The fourth end of the second terminal cooler is connected to the third end of the second water cooler. The first end of the second water cooler is connected to the second end of the second circulating water cooling regulating valve. The second end of the second water cooler is connected to the inlet end of the final stage compressor. The outlet end of the final stage compressor is connected to the first end of the third water cooler. The second end of the third water cooler is connected to the second end of the third circulating water cooling regulating valve. The third end of the third water cooler is connected to the gas storage tank through a throttle valve. The first controller is connected to the ambient temperature detection unit, the inlet of the first-stage compressor, the inlet of the intermediate-stage compressor, the inlet of the final-stage compressor, the first circulating water-cooling regulating valve, and the gas storage pressure detection unit. The second controller is connected to the second and third circulating water-cooling regulating valves, the gas storage pressure detection unit, and the gas storage temperature detection unit. The port where the compressor connects to M represents the inlet, and the constricted end of the funnel represents the outlet. The specific port numbers of each component are not shown in the figure.

[0045] The system includes an ambient temperature detection unit to determine the ambient temperature, a gas storage pressure detection unit to determine the gas storage pressure, a gas storage temperature detection unit to determine the gas storage temperature, and a throttle valve to adjust the outlet pressure of the compressed air energy storage system. The acquisition of environmental and pressure information can be triggered periodically or based on data acquisition commands issued by the processing module; this embodiment does not impose any limitations. The advantage of this configuration is that it allows the compressed air energy storage system to adapt to various data acquisition methods. Periodically collected data enables self-adjustment of system performance, while data acquisition triggered by commands allows for personalized system performance adjustments.

[0046] This invention can set up two controllers, each acquiring and processing different types of data, and then controlling different types of components to improve system performance regulation efficiency through parallel control. Specifically, the first controller can be used to: determine the control parameters of the first-stage compressor, intermediate-stage compressor, final-stage compressor, and first circulating water-cooled regulating valve based on the ambient temperature obtained by the ambient temperature detection unit and the gas storage pressure obtained by the gas storage pressure detection unit, and control the first-stage compressor, intermediate-stage compressor, final-stage compressor, and first circulating water-cooled regulating valve to operate according to their respective control parameters. The second controller can be used to: determine the control parameters of the second and third circulating water-cooled regulating valves based on the gas storage temperature obtained by the gas storage temperature detection unit and the gas storage pressure obtained by the gas storage pressure detection unit, and control the second and third circulating water-cooled regulating valves to operate according to their respective control parameters.

[0047] It is worth noting that the compressed air energy storage system provided by this invention is a three-stage compression and two-stage expansion system. This is mainly to illustrate the structure and operation mode of a compressed air energy storage compression system with low energy loss and high conversion efficiency. This operation and control mode is also applicable to four-stage compression and three-stage expansion, five-stage compression and four-stage expansion, and other multi-stage compression and expansion systems. The intermediate compressor refers to a non-initial compressor whose outlet heat is recovered by a heat exchanger. The intermediate compressor can be two-stage, three-stage, etc. The first circulating cooling water regulating valve refers to the circulating cooling water flow regulating valve at the inlet end of each intermediate compressor; this embodiment does not limit this.

[0048] The technical solution of this embodiment acquires the operating information of the compressed air energy storage system periodically during operation, processes the information to obtain the equipment in the energy storage system that requires parameter adjustment and its operating parameters, ensuring the real-time nature of the equipment operating parameters. This reduces energy losses in both fluids and mechanical equipment during system charging and discharging, thereby improving the system's energy conversion efficiency. For example, it improves compression efficiency, reduces throttling losses during compression, reduces energy waste, and improves system efficiency.

[0049] Figure 3This is a flowchart illustrating a control method for a compressed air energy storage system provided by the present invention. This embodiment is applicable to situations requiring improved energy conversion efficiency and electro-electrical conversion efficiency of the compressed air energy storage system. The method is used in the compressed air energy storage system provided by the present invention and can be executed by the control device for the compressed air energy storage system provided by the present invention. This device can be implemented in hardware and / or software. In a specific embodiment, the device can be integrated into an electronic device. The following embodiments will illustrate this using the integration of the device into an electronic device as an example. (Refer to...) Figure 3 The method specifically includes the following steps:

[0050] S101. Using the information detection module, obtain the ambient temperature of the compressed air energy storage system, the gas storage temperature of the gas storage tank, and the gas storage pressure.

[0051] The information detection module can be understood as a device for acquiring parameters required for the optimization of the compressed air energy storage system, including but not limited to an ambient temperature sensor, a gas storage temperature sensor, and a gas storage pressure sensor. The ambient temperature sensor is used to measure the ambient temperature of the compressed air energy storage system, the gas storage temperature sensor is used to measure the gas storage temperature, and the gas storage pressure sensor is used to measure the gas storage pressure. Generally, the temperature at the inlet and outlet of the gas storage can represent the temperature of the gas storage, and the pressure at the inlet and outlet of the gas storage can represent the pressure of the gas storage.

[0052] For example, assuming the information acquisition frequency is once every 5 minutes, during the energy storage process of the compressed air energy storage system, the ambient temperature of the compressed air energy storage system is collected once every 5 minutes through an ambient temperature sensor, the gas pressure of the gas storage tank is collected once every 5 minutes through a gas storage tank pressure sensor, and the gas temperature of the gas storage tank is collected once every 5 minutes through a gas storage tank temperature sensor.

[0053] The advantage of this setup is that it ensures the real-time operation parameters of the compressed air energy storage system, thereby improving the safety of the gas storage facility while guaranteeing efficient energy storage.

[0054] S102. Using pre-set parameter processing rules, process the ambient temperature, gas storage temperature and gas storage pressure to obtain the first operating parameters of the regulating module and the second operating parameters of the compressor module.

[0055] The pre-defined parameter processing rules can be understood as an update scheme for the operating parameters of the regulating module and the compressor module in the compressed air energy storage system. The first operating parameter can be understood as the optimized operating parameter of the regulating module parsed from the data acquired in S101, and the second operating parameter can be understood as the optimized operating parameter of the compressor module parsed from the data acquired in S101. The advantage of this setting is that it optimizes the operating parameters of the regulating module and the compressor module, thereby improving the energy storage efficiency and safety of the compressed air energy storage system.

[0056] The control method of this invention is applicable to the aforementioned compressed air energy storage system, which includes a first processor and a second processor, each performing different data processing tasks and controlling different components. In this embodiment, the parameter processing rules include a first type of parameter processing rule and a second type of parameter processing rule. The first type of parameter processing rule can be understood as data processing rules loaded and deployed on the first processor, applicable to parameter information transmitted to the first processor; the second type of parameter processing rule can be understood as data processing rules loaded and deployed on the second processor, applicable to parameter information transmitted to the second processor. It is worth noting that the adjustment module contains components controlled by both the first and second processors. Therefore, the operating parameters of the adjustment module are distinguished and divided into two, determined by the first and second processors respectively. For example, the first operating parameters include a third operating parameter and a fourth operating parameter. The third operating parameter can be understood as the operating parameter of the component controlled by the first processor in the adjustment module, and the fourth operating parameter can be understood as the operating parameter of the component controlled by the second processor in the adjustment module.

[0057] Based on this, S102 may include: processing the ambient temperature and gas storage pressure using the first type of parameter processing rules to obtain the second and third operating parameters; and processing the gas storage temperature and gas storage pressure using the second type of parameter processing rules to obtain the fourth operating parameter.

[0058] The first processor controls the first circulating water-cooling regulating valve. The compressor module includes a first-stage compressor, an intermediate-stage compressor, and a final-stage compressor. The second processor controls the second and third circulating water-cooling regulating valves. The first type of parameter processing rules includes calculation rules for the opening values ​​of the inlet guide vanes of the first-stage compressor, the intermediate-stage compressor, the final-stage compressor speed, and the first circulating cooling water regulating valve opening. The second type of parameter processing rules includes calculation rules for the opening values ​​of the second and third circulating cooling water regulating valves.

[0059] The calculation rules can be pre-trained and defined data lookup tables, or pre-defined data processing rules, to quickly find the required target values ​​based on the acquired information, thereby obtaining the optimized parameters of the compressed air energy storage system. Taking a pre-defined information lookup table as an example, the calculation rule for the inlet guide vane opening value of the first-stage compressor can be understood as a pre-set correlation table between ambient temperature, gas storage pressure, and the opening value coefficient of the first-stage compressor. By searching the table based on the ambient temperature and gas storage pressure, the opening value coefficient of the first-stage compressor can be matched. The calculation rule for the inlet guide vane opening value of the intermediate-stage compressor is also a pre-set correlation table between ambient temperature, gas storage pressure, and the opening value coefficient of the intermediate-stage compressor. By searching the table based on the ambient temperature and gas storage pressure, the opening value coefficient of the intermediate-stage compressor can be matched. The calculation rule for the final compressor speed value is based on a pre-set correlation table between ambient temperature, gas storage pressure, and the final compressor speed coefficient. The final compressor speed coefficient is determined by searching the table based on the ambient temperature and gas storage pressure. Similarly, the calculation rule for the first circulating cooling water regulating valve opening value is based on a pre-set correlation table between ambient temperature, gas storage pressure, and the first circulating cooling water regulating valve opening coefficient. The second circulating cooling water regulating valve opening value is calculated using a pre-set correlation table between gas storage temperature, gas storage pressure, and the second circulating cooling water regulating valve opening coefficient. The calculation rule for the opening value of the third circulating cooling water regulating valve is based on a pre-set correlation table of air tank temperature, air tank pressure, and the opening value coefficient of the third circulating cooling water regulating valve. The opening value coefficient of the third circulating cooling water regulating valve can be matched by looking up the air tank temperature and air tank pressure in the table.

[0060] In one embodiment, when the regulating module includes a first circulating water-cooled regulating valve and the compressor module includes a first-stage compressor, an intermediate-stage compressor, and a final-stage compressor, the ambient temperature and gas storage pressure are processed using a first-type parameter processing rule to obtain second and third operating parameters. This includes: processing the ambient temperature and gas storage pressure using the first-stage compressor inlet guide vane opening value calculation rule to obtain the opening value coefficient of the first-stage compressor, and determining the inlet guide vane opening of the first-stage compressor based on the opening value coefficient and the opening design value; and processing the ambient temperature and gas storage pressure using the intermediate-stage compressor inlet guide vane opening value calculation rule to obtain the intermediate-stage compressor... The compressor opening value coefficient is determined, and the inlet guide vane opening of the intermediate compressor is determined based on the opening value coefficient and the opening design value of the intermediate compressor. Using the calculation rules for the final compressor speed value, the ambient temperature and gas storage pressure are processed to obtain the final compressor speed value coefficient, and the speed information of the final compressor is determined based on the final compressor speed value coefficient and the speed design value. Using the calculation rules for the opening value of the first circulating cooling water regulating valve, the ambient temperature and gas storage pressure are processed to obtain the opening value coefficient of the first circulating cooling water regulating valve, and the opening information of the first circulating cooling water regulating valve is determined based on the opening value coefficient and the opening design value.

[0061] In another embodiment, when the regulating module includes a second circulating water-cooled regulating valve and a third circulating water-cooled regulating valve, the gas storage temperature and pressure are processed using the second type of parameter processing rules to obtain a fourth operating parameter, including: processing the gas storage temperature and pressure using the second circulating cooling water regulating valve opening value calculation rules to obtain the opening value coefficient of the second circulating cooling water regulating valve, and determining the opening information of the second circulating cooling water regulating valve based on the opening value coefficient and the opening design value; processing the gas storage temperature and pressure using the third circulating cooling water regulating valve opening value calculation rules to obtain the opening value coefficient of the third circulating cooling water regulating valve, and determining the opening information of the third circulating cooling water regulating valve based on the opening value coefficient and the opening design value.

[0062] In this invention, the design value is a standardized quantified value, and the operating parameters of each component are the product of the design value and a coefficient. For example, the inlet guide vane opening of the first-stage compressor. , This represents the opening value coefficient of the first stage compressor. This indicates the design opening value for the first stage compressor. The inlet guide vane opening value for the intermediate stage compressor is also shown. , This represents the opening degree coefficient of the intermediate section compressor. This indicates the design opening value for the intermediate compressor stage. The speed information for the final compressor stage is also shown. , This represents the speed coefficient of the final stage compressor. This indicates the design speed of the final stage compressor. It also includes information on the opening degree of the first circulating cooling water regulating valve. , This represents the opening value coefficient of the first circulating cooling water regulating valve. This indicates the design value of the opening of the first circulating cooling water regulating valve, and the opening information of the second circulating cooling water regulating valve. , This represents the opening value coefficient of the second circulating cooling water regulating valve. This indicates the design value for the opening of the second circulating cooling water regulating valve. Information on the opening of the third circulating cooling water regulating valve. , This represents the opening value coefficient of the third circulating cooling water regulating valve. This indicates the design value for the opening of the third circulating cooling water regulating valve.

[0063] Specifically, Table 1 shows the relationship between the opening coefficient of the first-stage compressor and the ambient temperature and gas storage pressure; Table 2 shows the relationship between the opening coefficient of the intermediate-stage compressor and the ambient temperature and gas storage pressure; Table 3 shows the relationship between the speed coefficient of the final-stage compressor and the ambient temperature and gas storage pressure; Table 4 shows the relationship between the opening coefficient of the first circulating cooling water regulating valve and the ambient temperature and gas storage pressure; Table 5 shows the relationship between the opening coefficient of the second circulating cooling water regulating valve and the gas storage temperature and gas storage pressure; and Table 6 shows the relationship between the opening coefficient of the third circulating cooling water regulating valve and the gas storage temperature and gas storage pressure. In the tables, TAMB represents the ambient temperature, T represents the gas storage temperature, and P represents the gas storage pressure. Tables 1-4 have horizontal headers representing multiple different ambient temperatures, with TAMBdesign indicating the design temperature. The vertical headers represent multiple different gas storage pressures, with Pdesign indicating the design pressure. Tables 5-6 have horizontal headers representing multiple different ambient temperatures, with Tdesign indicating the design temperature. The vertical headers represent multiple different gas storage pressures, with Pdesign indicating the design pressure. The corresponding coefficients can be obtained by looking up the measured data in the tables. It is worth noting that the tables only show partial data. Theoretically, all combinations of temperature and pressure can be matched with corresponding coefficients in the tables. If no match is found, this invention also provides coefficient calculation logic for calculating the coefficients.

[0064]

[0065] Table 1 shows the relationship between the opening value coefficient of the first-stage compressor and the ambient temperature and gas storage pressure. Assuming the ambient temperature is TAMB1 and the gas storage pressure is P1, the opening value coefficient of the first-stage compressor is 1.

[0066]

[0067] Table 2 shows the relationship between the opening value coefficient of the intermediate compressor and the ambient temperature and gas storage pressure. Assuming the ambient temperature is TAMB1 and the gas storage pressure is P1, the opening value coefficient of the intermediate compressor is 0.89.

[0068]

[0069] Table 3 shows the relationship between the speed coefficient of the final compressor and the ambient temperature and gas storage pressure. Assuming the ambient temperature is TAMB1 and the gas storage pressure is P1, the speed coefficient of the final compressor is 0.

[0070]

[0071] Table 4 shows the relationship between the opening value coefficient of the first circulating cooling water regulating valve and the ambient temperature and gas pressure. Assuming the ambient temperature is TAMB1 and the gas pressure is P1, the opening value coefficient of the first circulating cooling water regulating valve is 0.57.

[0072]

[0073] Table 5 shows the relationship between the opening value coefficient of the second circulating cooling water regulating valve and the gas chamber temperature and pressure. Assuming the gas chamber temperature is T1 and the gas chamber pressure is P1, the opening value coefficient of the second circulating cooling water regulating valve is 1.

[0074]

[0075] Table 6 shows the relationship between the opening value coefficient of the third circulating cooling water regulating valve and the gas chamber temperature and pressure. Assuming the gas chamber temperature is T1 and the gas chamber pressure is P1, the opening value coefficient of the third circulating cooling water regulating valve is 0.

[0076] Summarizing the data in the table above, as well as the control methods and logic of the compressed air energy storage system, we can conclude that:

[0077] 1) When the ambient temperature and gas storage pressure are at their design values, the coefficient is set to 1. When the gas storage pressure is low, the coefficient is appropriately reduced or kept constant. Specifically, reducing or keeping the opening of the inlet guide vanes of the first-stage compressor constant, reducing the opening of the inlet guide vanes of the intermediate-stage compressor, reducing the speed of the final-stage compressor, reducing the circulating cooling water flow rate of the intermediate-stage compressor inlet water cooler, and increasing the inlet temperature of the intermediate-stage compressor can all reduce the outlet pressure of the entire compression system, thereby reducing the throttle valve losses. When the gas storage pressure increases, the coefficient gradually increases. Specifically, increasing or maintaining the opening of the inlet guide vanes of the first-stage compressor, increasing the opening of the inlet guide vanes of the intermediate-stage compressor, increasing the speed of the final-stage compressor, and increasing the circulating cooling water flow rate of the intermediate-stage compressor inlet water cooler can all increase the outlet pressure of the entire compression system, making the outlet pressure of the compression system match the gas storage pressure.

[0078] 2) The correction coefficients a1 for the inlet guide vane opening of the first-stage compressor, a2 for the inlet guide vane opening of the intermediate-stage compressor, a3 for the speed of the final-stage compressor, and k1 for the opening of the first circulating cooling water regulating valve all vary with the ambient temperature. On the one hand, when the ambient temperature is lower than the design value, adjusting a1, a2, a3, and k1 minimizes the compression work of the compression system, improving system efficiency. Simultaneously, it also maximizes the outlet temperature of the first-stage and intermediate-stage compressors, addressing the issue of low hot tank temperature during winter operation of the compressed air energy storage system. On the other hand, when the ambient temperature is higher than the design temperature, decreasing a1 reduces the pressure ratio of the first-stage compressor, preventing excessively high outlet temperature. Increasing a2 and k1 increases the circulating cooling water flow, minimizing the inlet temperature of the intermediate-stage compressor and increasing the pressure ratio. Adjusting a3 matches the outlet pressure of the final-stage compressor with the gas storage pressure. These adjustments minimize the compression work of the compression system and reduce the outlet temperatures of the first-stage and intermediate-stage compressors, addressing the issue of overheating of the first and second final coolers and the hot tank during summer operation of the compressed air energy storage system.

[0079] 3) The opening correction coefficients k2 and k3 of the second and third circulating cooling water regulating valves are both set to 1 when the gas storage temperature and pressure are at their design values. During the filling process, the gas storage pressure gradually increases. Coefficient k2 should be as large as possible, that is, to reduce the inlet temperature of the final compressor as much as possible, which helps to reduce the power consumption of the final compressor. Coefficient k3 should be as large as possible, that is, to cool the high-pressure air at the outlet of the final compressor as much as possible, so as to maximize the quality of air stored in the gas storage tank under a fixed maximum operating pressure.

[0080] 4) When the air temperature inside the gas storage tank is not lower than the second lowest allowable value of the gas storage system, k2 and k3 should be as large as possible, that is, to reduce the inlet temperature of the terminal compressor as much as possible, which helps to reduce the power consumption of the terminal compressor and to cool the high-pressure air at the outlet of the terminal compressor as much as possible. However, when the air temperature inside the gas storage tank is lower than the second lowest allowable value of the gas storage system, k3 and k2 should be reduced so that they are not at their maximum values, that is, to reduce the inlet temperature of the terminal compressor as much as possible, which helps to reduce the power consumption of the terminal compressor and to reduce the degree of cooling of the high-pressure air at the outlet of the terminal compressor, preventing the air temperature inside the gas storage tank from falling below the allowable value. When the temperature inside the gas storage tank is lower than the minimum allowable value, k2 and k3 should both be reduced to quickly increase the temperature of the high-pressure air entering the gas storage tank and ensure that the operating temperature of the gas storage tank is higher than the allowable low temperature.

[0081] It is worth noting that the correction coefficient of this invention is essentially the coefficient of each parameter value. The word "correction" is used to indicate that the coefficient is used to correct and optimize the operating parameters of each component, but the actual purpose is the same.

[0082] S103, the control and adjustment module operates based on the first operating parameter, and the compressor module operates based on the second operating parameter, in order to reduce the energy loss of the compressed air energy storage system.

[0083] Specifically, the control and regulation module operates based on the first operating parameter, and the compressor module operates based on the second operating parameter. This can be understood as controlling the first-stage compressor to operate based on the opening degree of the inlet guide vane of the first-stage compressor, the intermediate-stage compressor to operate based on the opening degree of the inlet guide vane of the intermediate-stage compressor, the final-stage compressor to operate based on the speed information of the final-stage compressor, the first circulating cooling water regulating valve to operate based on the opening degree information of the first circulating cooling water regulating valve, the second circulating cooling water regulating valve to operate based on the opening degree information of the second circulating cooling water regulating valve, and the third circulating cooling water regulating valve to operate based on the opening degree information of the third circulating cooling water regulating valve.

[0084] For example, assuming the inlet guide vane opening of the first-stage compressor is X1, the inlet guide vane opening of the intermediate-stage compressor is X2, the speed information of the final-stage compressor is X3, the opening information of the first circulating cooling water regulating valve is X4, the opening information of the second circulating cooling water regulating valve is X5, and the opening information of the third circulating cooling water regulating valve is X6, then the first-stage compressor is controlled to operate based on X1, the intermediate-stage compressor based on X2, the final-stage compressor based on X3, the first circulating cooling water regulating valve based on X4, the second circulating cooling water regulating valve based on X5, and the third circulating cooling water regulating valve based on X6. The advantage of this setup is that it allows for rapid adjustment of the operating parameters of the compressed air energy storage system, enabling it to safely, stably, and efficiently store and convert energy.

[0085] It is worth noting that, under normal circumstances, the inlet guide vane opening and the regulating valve can be directly controlled by the processor, while the rotational speed information is obtained by the processor through controlling the robotic arm.

[0086] The control method of this embodiment is applied to the compressed air energy storage system provided in the above embodiment, and has the corresponding beneficial effects of the compressed air energy storage system. Secondly, the beneficial effects that this invention can achieve include: 1) By real-time monitoring of ambient temperature and gas storage pressure, the guide vanes of the first-stage compressor are appropriately adjusted to maintain the compressor outlet temperature within the safe and stable range of the system; by adjusting the guide vanes of the first-stage compressor, the guide vanes of the intermediate-stage compressor, and the speed of the final-stage compressor to distribute the compressor pressure ratio of each stage, the compression power consumption is minimized; by adjusting the circulating water flow rate entering each stage water cooler to adjust the inlet air temperature of the intermediate-stage compressor, the compressor pressure ratio is matched with the gas storage pressure, reducing throttling losses; by adjusting the speed of the variable frequency compressor to match the outlet pressure of the compression system with the gas storage pressure, the overall power consumption of the compressor during compressed air is reduced. 2) By adjusting the inlet air temperature of the final-stage compressor, especially when the gas storage temperature is low, the inlet temperature of the final-stage compressor is increased, reducing the cooling of the outlet air of the final-stage compressor, increasing the gas storage temperature, and thus ensuring that the gas storage temperature is within a safe range. 3) The regulating mechanism of the present invention includes at least the guide vane opening or speed of each compressor section and the opening of multiple circulating cooling water valves. The correction coefficients of the compressor guide vane opening and the opening of the circulating cooling water regulating valves under different ambient temperatures, gas storage pressures, and gas storage temperatures are obtained through simulation and operation calibration and set in the control system. This positive control method reduces the conflict of regulating variables compared with the feedback control method, improves the control stability of the system, effectively improves the operating efficiency of the system, saves the electricity cost of the energy storage system, and creates considerable economic benefits.

[0087] Figure 4 This is a schematic diagram of the control device for a compressed air energy storage system provided by the present invention. Figure 4 As shown, the device includes: an acquisition module 201, a determination module 202, and a control module 203.

[0088] The acquisition module 201 is used to acquire the ambient temperature of the compressed air energy storage system, the gas temperature of the gas storage tank, and the gas pressure of the gas storage tank using the information detection module.

[0089] The determination module 202 is used to process the ambient temperature, gas storage temperature and gas storage pressure using pre-set parameter processing rules to obtain the first operating parameters of the adjustment module and the second operating parameters of the compressor module.

[0090] The control module 203 is used to control the adjustment module to operate based on the first operating parameter and the compressor module to operate based on the second operating parameter, so as to reduce the energy loss of the compressed air energy storage system.

[0091] Optionally, the parameter processing rules include a first type of parameter processing rules and a second type of parameter processing rules, and the first running parameters include a third running parameter and a fourth running parameter.

[0092] Optionally, the determining module 202 is specifically used to process the ambient temperature and gas storage pressure using the first type of parameter processing rules to obtain the second and third operating parameters; and to process the gas storage temperature and gas storage pressure using the second type of parameter processing rules to obtain the fourth operating parameter.

[0093] Optionally, the first type of parameter processing rules includes the calculation rules for the opening value of the inlet guide vane of the first stage compressor, the calculation rules for the opening value of the inlet guide vane of the intermediate stage compressor, the calculation rules for the speed value of the final stage compressor, and the calculation rules for the opening value of the first circulating cooling water regulating valve; the second type of parameter processing rules includes the calculation rules for the opening value of the second circulating cooling water regulating valve and the calculation rules for the opening value of the third circulating cooling water regulating valve.

[0094] Optionally, when the regulating module includes a first circulating water-cooled regulating valve, and the compressor module includes a first-stage compressor, an intermediate-stage compressor, and a final-stage compressor, the determining module 202 is specifically used to process the ambient temperature and gas storage pressure using the calculation rules for the inlet guide vane opening value of the first-stage compressor to obtain the opening value coefficient of the first-stage compressor, and to determine the inlet guide vane opening of the first-stage compressor based on the opening value coefficient and the opening design value; and to process the ambient temperature and gas storage pressure using the calculation rules for the inlet guide vane opening value of the intermediate-stage compressor to obtain the opening value coefficient of the intermediate-stage compressor, and to determine the opening value of the inlet guide vane of the first-stage compressor based on the opening value coefficient and the opening design value of the intermediate-stage compressor. The opening value coefficient and the opening design value are used to determine the inlet guide vane opening of the intermediate section compressor; using the calculation rules for the speed value of the final section compressor, the ambient temperature and gas storage pressure are processed to obtain the speed value coefficient of the final section compressor, and the speed information of the final section compressor is determined according to the speed value coefficient and the speed design value; using the calculation rules for the opening value of the first circulating cooling water regulating valve, the ambient temperature and gas storage pressure are processed to obtain the opening value coefficient of the first circulating cooling water regulating valve, and the opening information of the first circulating cooling water regulating valve is determined according to the opening value coefficient and the opening design value.

[0095] Optionally, when the regulating module includes a second circulating water-cooled regulating valve and a third circulating water-cooled regulating valve, the determining module 202 is specifically used to process the gas storage temperature and pressure using the calculation rules for the opening value of the second circulating cooling water regulating valve, to obtain the opening value coefficient of the second circulating cooling water regulating valve, and to determine the opening information of the second circulating cooling water regulating valve based on the opening value coefficient and the opening design value; and to process the gas storage temperature and pressure using the calculation rules for the opening value of the third circulating cooling water regulating valve, to obtain the opening value coefficient of the third circulating cooling water regulating valve, and to determine the opening information of the third circulating cooling water regulating valve based on the opening value coefficient and the opening design value.

[0096] The control device for the compressed air energy storage system provided in this embodiment can execute the control method for the compressed air energy storage system provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the method.

[0097] Figure 5 This is a schematic diagram of the structure of an electronic device provided by the present invention. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (such as helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0098] like Figure 5 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the read-only memory (ROM) 12 or loaded from storage unit 18 into the random access memory (RAM) 13. The RAM 13 can also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0099] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0100] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, digital signal processors (DSPs), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as the control methods for a compressed air energy storage system.

[0101] In some embodiments, the control method for the compressed air energy storage system may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded into and / or installed on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the control method for the compressed air energy storage system described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to perform the control method for the compressed air energy storage system by any other suitable means (e.g., by means of firmware).

[0102] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0103] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0104] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0105] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device for displaying information to the user (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor); and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including voice input, voice input, or tactile input).

[0106] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), middleware components (e.g., application servers), or frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0107] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0108] In one embodiment, the present invention further includes a computer program product comprising a computer program that, when executed by a processor, implements the control method of the compressed air energy storage system according to any embodiment of the present invention.

[0109] In implementing the computer program product, computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof. Programming languages ​​include object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0110] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0111] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A compressed air energy storage system, characterized in that, include: The system comprises a control module, an information detection module, an adjustment module, a gas storage tank, and a compressor module. The control module is connected to the information detection module, the adjustment module, and the compressor module. The gas storage tank is connected to both the compressor module and the information detection module. The gas storage tank is used to store high-pressure air. The information detection module includes an ambient temperature detection unit, a gas storage tank pressure detection unit, and a gas storage tank temperature detection unit. The compressor module includes a first-stage compressor, an intermediate-stage compressor, and a final-stage compressor. The adjustment module includes a first circulating water-cooled adjustment valve, a second circulating water-cooled adjustment valve, and a third circulating water-cooled adjustment valve. The control module includes a first controller and a second controller. The control module is used to collect the initial operating parameters of the compressed air energy storage system through the information detection module when the compressed air energy storage system is running, determine the module to be adjusted and the target operating parameters of the compressed air energy storage system based on the initial operating parameters, and control the module to be adjusted to operate based on the target operating parameters. When the compressed air energy storage system is running, the gas storage tank performs potential energy storage or potential energy release. The initial operating parameters include the ambient temperature of the compressed air energy storage system, the gas storage tank temperature and gas storage tank pressure. The module to be adjusted includes the compressor module and the adjustment module. The target operating parameters are used to reduce the energy loss of the compressed air energy storage system and improve the control stability of the system. The first controller is specifically configured to: based on the ambient temperature obtained by the ambient temperature detection unit and the gas storage pressure obtained by the gas storage pressure detection unit, search in a pre-set association table to obtain the control parameters of the first-stage compressor, the intermediate-stage compressor, the final-stage compressor, and the first circulating water-cooling regulating valve, and control the first-stage compressor, the intermediate-stage compressor, the final-stage compressor, and the first circulating water-cooling regulating valve to operate based on their respective control parameters; the control parameter of the first-stage compressor is the inlet guide vane opening of the first-stage compressor, the control parameter of the intermediate-stage compressor is the inlet guide vane opening of the intermediate-stage compressor, the control parameter of the final-stage compressor is the rotational speed of the final-stage compressor, and the control parameter of the first circulating water-cooling regulating valve is the opening of the first circulating cooling water regulating valve; The second controller is specifically used to: based on the gas storage temperature obtained by the gas storage temperature detection unit and the gas storage pressure obtained by the gas storage pressure detection unit, search in a pre-set association table to obtain the control parameters of the second circulating water cooling regulating valve and the third circulating water cooling regulating valve, and control the second circulating water cooling regulating valve and the third circulating water cooling regulating valve to operate based on their respective control parameters; the control parameter of the second circulating water cooling regulating valve is the opening degree of the second circulating cooling water regulating valve, and the control parameter of the third circulating water cooling regulating valve is the opening degree of the third circulating cooling water regulating valve.

2. The compressed air energy storage system according to claim 1, characterized in that, The ambient temperature detection unit is deployed at the inlet of the compressor module to determine the ambient temperature; The gas storage pressure detection unit is deployed at the gas inlet or gas outlet of the gas storage tank to determine the gas storage pressure, and the gas storage temperature detection unit is deployed at the gas inlet or gas outlet of the gas storage tank to determine the gas storage temperature.

3. The compressed air energy storage system according to claim 2, characterized in that, in, The first end of the first circulating water-cooled regulating valve is connected to the control module, the second end of the first circulating water-cooled regulating valve is connected to the energy storage auxiliary device, the first end of the second circulating water-cooled regulating valve is connected to the control module, the second end of the second circulating water-cooled regulating valve is connected to the energy storage auxiliary device, the first end of the third circulating water-cooled regulating valve is connected to the control module, and the second end of the third circulating water-cooled regulating valve is connected to the energy storage auxiliary device.

4. The compressed air energy storage system according to claim 3, characterized in that, The energy storage auxiliary equipment includes a cold tank, a hot tank, a first terminal cooler, a second terminal cooler, a first water cooler, a second water cooler, a third water cooler, and a throttle valve; The hot tank is connected to the first end of the first terminal cooler and the first end of the second terminal cooler, respectively. The cold tank is connected to the second end of the first terminal cooler and the second end of the second terminal cooler, respectively. The third end of the first terminal cooler is connected to the outlet end of the first-stage compressor. The inlet end of the first-stage compressor is connected to the ambient temperature detection unit and the control module, respectively. The fourth end of the first terminal cooler is connected to the third end of the first water cooler. The first end of the first water cooler is connected to the second end of the first circulating water cooling regulating valve. The second end of the first water cooler is connected to the inlet end of the intermediate-stage compressor. The third end of the second terminal cooler is connected to the outlet end of the intermediate-stage compressor. The fourth end of the second terminal cooler is connected to the third end of the second water cooler. The first end of the second water cooler is connected to the second end of the second circulating water cooling regulating valve. The second end of the second water cooler is connected to the inlet end of the final-stage compressor. The outlet end of the final-stage compressor is connected to the first end of the third water cooler. The second end of the third water cooler is connected to the second end of the third circulating water cooling regulating valve. The third end of the third water cooler is connected to the air storage tank through the throttle valve, which is used to adjust the outlet pressure of the compressed air energy storage system.

5. The compressed air energy storage system according to claim 4, characterized in that, The first controller is connected to the ambient temperature detection unit, the inlet end of the first stage compressor, the inlet end of the intermediate stage compressor, the inlet end of the last stage compressor, the first circulating water cooling regulating valve, and the gas storage pressure detection unit; the second controller is connected to the second circulating water cooling regulating valve, the third circulating water cooling regulating valve, the gas storage pressure detection unit, and the gas storage temperature detection unit.

6. A control method for a compressed air energy storage system, characterized in that, The method, applied to the control module of the compressed air energy storage system according to any one of claims 1 to 5, comprises: The ambient temperature, gas temperature, and gas pressure of the compressed air energy storage system are obtained using the information detection module. Using pre-set parameter processing rules, the ambient temperature, the gas storage temperature, and the gas storage pressure are processed to obtain the first operating parameters of the regulating module and the second operating parameters of the compressor module; The regulating module operates based on the first operating parameter, and the compressor module operates based on the second operating parameter, in order to reduce the energy loss of the compressed air energy storage system.

7. The method according to claim 6, characterized in that, The parameter processing rules include a first type of parameter processing rules and a second type of parameter processing rules. The first operating parameters include a third operating parameter and a fourth operating parameter. The step of processing the ambient temperature, the gas storage temperature, and the gas storage pressure using pre-set parameter processing rules to obtain the first operating parameters of the regulating module and the second operating parameters of the compressor module includes: Using the first type of parameter processing rules, the ambient temperature and the gas storage pressure are processed to obtain the second operating parameter and the third operating parameter; Using the second type of parameter processing rules, the gas storage temperature and the gas storage pressure are processed to obtain the fourth operating parameter; The second operating parameter includes the operating parameters of the first stage compressor, the intermediate stage compressor and the last stage compressor; the third operating parameter is the operating parameter of the first circulating water cooling regulating valve; and the fourth operating parameter includes the operating parameters of the second circulating water cooling regulating valve and the third circulating water cooling regulating valve.

8. The method according to claim 7, characterized in that, The first type of parameter processing rules includes calculation rules for the inlet guide vane opening value of the first-stage compressor, the inlet guide vane opening value of the intermediate-stage compressor, the speed value of the final-stage compressor, and the opening value of the first circulating cooling water regulating valve. When the regulating module includes a first circulating water cooling regulating valve, and the compressor module includes a first-stage compressor, an intermediate-stage compressor, and a final-stage compressor, the first type of parameter processing rules are used to process the ambient temperature and the gas storage pressure to obtain the second operating parameters and the third operating parameters, including: Using the calculation rules for the inlet guide vane opening value of the first-stage compressor and a pre-set correlation table, the ambient temperature and the gas storage pressure are processed to obtain the opening value coefficient of the first-stage compressor. The inlet guide vane opening of the first-stage compressor is then determined based on the opening value coefficient and the opening design value. Using the calculation rules for the inlet guide vane opening value of the intermediate section compressor and a pre-set correlation table, the ambient temperature and the gas storage pressure are processed to obtain the opening value coefficient of the intermediate section compressor, and the inlet guide vane opening of the intermediate section compressor is determined based on the opening value coefficient and the opening design value. Using the calculation rules for the speed value of the terminal compressor and a pre-set correlation table, the ambient temperature and the gas storage pressure are processed to obtain the speed value coefficient of the terminal compressor, and the speed information of the terminal compressor is determined based on the speed value coefficient and the speed value design value. Using the calculation rules for the opening value of the first circulating cooling water regulating valve and a pre-set correlation table, the ambient temperature and the gas reservoir pressure are processed to obtain the opening value coefficient of the first circulating cooling water regulating valve. Based on the opening value coefficient and the opening design value of the first circulating cooling water regulating valve, the opening information of the first circulating cooling water regulating valve is determined.

9. The method according to claim 7, characterized in that, The second type of parameter processing rules includes calculation rules for the opening value of the second circulating cooling water regulating valve and the third circulating cooling water regulating valve. When the regulating module includes the second circulating water cooling regulating valve and the third circulating water cooling regulating valve, the second type of parameter processing rules are used to process the gas storage temperature and the gas storage pressure to obtain the fourth operating parameter, including: Using the calculation rules for the opening value of the second circulating cooling water regulating valve and the pre-set correlation table, the temperature and pressure of the gas storage are processed to obtain the opening value coefficient of the second circulating cooling water regulating valve, and the opening information of the second circulating cooling water regulating valve is determined based on the opening value coefficient and the opening design value. Using the calculation rules for the opening value of the third circulating cooling water regulating valve and the pre-set correlation table, the temperature and pressure of the gas storage are processed to obtain the opening value coefficient of the third circulating cooling water regulating valve. Based on the opening value coefficient and the opening design value of the third circulating cooling water regulating valve, the opening information of the third circulating cooling water regulating valve is determined.

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