Method and system for adjusting power of compressed air energy storage system

Abstract

The invention discloses a compressed air energy storage system power adjusting method and system. The method comprises the steps that a first power grid dispatching instruction is acquired, and a first target power value is acquired according to the first power grid dispatching instruction; presetting a first dynamic power threshold value, and performing first judgment based on the first target power value and the first dynamic power threshold value; and determining adjustment operation according to the first judgment result, wherein the adjustment operation comprises first adjustment and second adjustment. By dynamically adjusting the power threshold value and the adjusting strategy, the response speed and the adjusting precision of the compressed air energy storage system to the power grid dispatching instruction are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power systems, and in particular, to a method and system for power regulation of a compressed air energy storage system. Background Art

[0002] With the wide application of renewable energy, the stability of the power grid faces new challenges. Compressed Air Energy Storage (CAES) as an effective energy storage method can effectively alleviate these problems. Traditional CAES systems have certain limitations in responding to the power grid dispatching requirements, especially in insufficient performance in quickly adjusting the compressor power to adapt to load changes. In order to fully utilize the frequency modulation ability of the CAES system, it is necessary to develop advanced control methods to achieve fast and accurate power regulation.

[0003] In the prior art, the compressed air energy storage system usually adopts a fixed control method to regulate the power of the compressor. This fixed control method cannot be flexibly adjusted when the system load changes greatly or external conditions fluctuate, which easily leads to untimely adjustment or over-regulation, affecting the stability and efficiency of the system. In addition, the fixed control method uses the same adjustment strategy in different operating states (such as light load and heavy load), unable to fully exploit the potential of the system, increasing the wear and failure risk of the equipment, and limiting the overall performance and economy of the system. Summary of the Invention

[0004] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this part, the abstract, and the title, but such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above existing problems, the present invention is proposed.

[0006] Therefore, the present invention provides a method and system for power regulation of a compressed air energy storage system, which can solve the problems mentioned in the background art.

[0007] To solve the above technical problems, the present invention provides the following technical solutions:

[0008] In the first aspect, the present invention provides a method for power regulation of a compressed air energy storage system, including:

[0009] Obtain a first power grid dispatching instruction, and obtain a first target power value according to the first power grid dispatching instruction;

[0010] Preset a first dynamic power threshold, and make a first judgment based on the first target power value and the first dynamic power threshold;

[0011] Determine an adjustment operation according to the first judgment result, where the adjustment operation includes a first adjustment and a second adjustment.

[0012] As a preferred solution of the power adjustment method for the compressed air energy storage system of the present invention, wherein: the first dynamic power threshold includes a first power threshold and a second power threshold;

[0013] Set a first load critical value;

[0014] Judge the relationship between the system load and the first load critical value, and select the first power threshold or the second power threshold according to the relationship between the system load and the first load critical value.

[0015] As a preferred solution of the power adjustment method for the compressed air energy storage system of the present invention, wherein: the first adjustment and the second adjustment include:

[0016] The first adjustment is a power adjustment strategy for first-level changes;

[0017] The second adjustment is a power adjustment strategy for second-level changes.

[0018] As a preferred solution of the power adjustment method for the compressed air energy storage system of the present invention, wherein: the presetting of the first dynamic power threshold and making the first judgment based on the first target power value and the first dynamic power threshold include:

[0019] Determine a first power change amount according to the first target power value and the real-time operating power;

[0020] Judge the relationship between the first power change amount and the first dynamic power threshold;

[0021] Make a first judgment according to the relationship between the first power change amount and the first dynamic power threshold.

[0022] As a preferred solution of the power adjustment method for the compressed air energy storage system of the present invention, wherein: the determining of the adjustment operation according to the first judgment result includes:

[0023] If the first power change amount is greater than the first dynamic power threshold, perform the first adjustment;

[0024] If the first power change amount is not greater than the first dynamic power threshold, perform the second adjustment.

[0025] As a preferred solution of the power adjustment method for the compressed air energy storage system of the present invention, wherein: the first adjustment includes:

[0026] After obtaining the first target power value, obtain the first target speed of the compressor according to the first target power value;

[0027] Adjust the first output power of the frequency converter according to the first target speed, so that the first actual speed of the compressor is the same as the first target speed.

[0028] As a preferred solution of the power regulation method of the compressed air energy storage system described in the present invention, wherein: the second regulation includes:

[0029] Adjust the opening of the intake valve through the intake valve controller to control the intake air flow;

[0030] Adjust the output power of the compressor, and monitor the intake air flow and the output power of the compressor in real time to make it reach the first target power value.

[0031] In a second aspect, the present invention provides a power regulation system for a compressed air energy storage system, including:

[0032] A data acquisition module, configured to acquire a first power grid dispatch instruction, and acquire a first target power value according to the first power grid dispatch instruction;

[0033] A judgment module, configured to preset a first dynamic power threshold, and perform a first judgment based on the first target power value and the first dynamic power threshold;

[0034] An adjustment module, configured to determine an adjustment operation according to the first judgment result, and the adjustment operation includes a first adjustment and a second adjustment.

[0035] In a third aspect, the present invention provides a computer device, including a memory and a processor, where the memory stores a computer program, and when the processor executes the computer program, the steps of the method described above are implemented.

[0036] In a fourth aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the method described above are implemented.

[0037] Compared with the prior art, the beneficial effects of the present invention: The present invention proposes a power regulation method and system for a compressed air energy storage system, acquires a first power grid dispatch instruction, and acquires a first target power value according to the first power grid dispatch instruction; preset a first dynamic power threshold, and perform a first judgment based on the first target power value and the first dynamic power threshold; determine an adjustment operation according to the first judgment result, and the adjustment operation includes a first adjustment and a second adjustment. By dynamically adjusting the power threshold and the adjustment strategy, the response speed and adjustment accuracy of the compressed air energy storage system to the power grid dispatch instruction are significantly improved.

[0038] Specifically, the preset first dynamic power threshold can be flexibly selected according to the system load conditions to ensure optimal regulation in different operating states. The first and second regulation strategies are respectively targeted at power changes at different levels, further refining the regulation means, enabling the system to operate efficiently in different scenarios. In addition, by real-time monitoring and adjusting the intake air flow and the compressor output power, it is ensured that the actual operating power of the system is highly consistent with the target power, effectively avoiding the problems of regulation lag and over-regulation in traditional fixed control methods. Overall, the present invention not only improves the stability and efficiency of the compressed air energy storage system, but also extends the service life of the equipment, reduces the operation and maintenance costs, and provides strong support for the stable operation of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. Among them:

[0040] Figure 1 It is a flowchart of a method and system for regulating the power of a compressed air energy storage system provided by an embodiment of the present invention;

[0041] Figure 2 It is an internal structure diagram of a computer device for a method and system for regulating the power of a compressed air energy storage system provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] To make the above objects, features, and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0043] Embodiment 1

[0044] Refer to Figure 1 - Figure 2 , which is the first embodiment of the present invention. This embodiment provides a method and system for regulating the power of a compressed air energy storage system, including:

[0045] In the existing related technologies, there are some problems, which are mainly reflected in the following aspects: First, the existing compressed air energy storage systems lack flexibility and efficiency in power regulation, resulting in a slow response speed of the system when dealing with different load demands and being unable to achieve fast and accurate power adjustment. Second, the energy conversion efficiency of traditional systems is low, and the energy loss is large, affecting the economy and operation stability of the overall system. Third, there are deficiencies in equipment compatibility and expandability in the existing technologies, making it difficult to effectively integrate with new energy equipment and control systems, restricting the application scope and development potential of the system.

[0046] This application provides a method that can effectively solve the above-mentioned problems. Next, multiple embodiments will be combined to elaborate in detail on how to implement the power regulation method of this compressed air energy storage system;

[0047] Figure 1 A method flow chart of a power regulation method and system for a compressed air energy storage system is shown, including:

[0048] S101, obtain the first power grid dispatching instruction, and obtain the first target power value according to the first power grid dispatching instruction;

[0049] In an optional embodiment, the power consumption side of the energy storage is a compressed air energy storage system, which mainly can include the following components: a compressor, a frequency converter, a high-pressure storage tank, an intake valve, a control unit, a detection device, and a safety protection device.

[0050] In an optional embodiment, the compressor is used to compress air and store it in the high-pressure storage tank. The rotational speed of the compressor can be adjusted by the frequency converter to achieve secondary frequency modulation.

[0051] In an optional embodiment, the frequency converter is electrically connected to the compressor and is used to adjust the rotational speed of the compressor. The frequency converter controls the rotational speed of the compressor by changing the output frequency, thereby achieving precise power regulation.

[0052] In an optional embodiment, the high-pressure storage tank is used to store the compressed air. The design of the storage tank needs to consider pressure resistance and safety.

[0053] In an optional embodiment, the intake valve is installed at the intake port of the compressor and is used to adjust the air flow rate entering the compressor. By adjusting the opening degree of the intake valve, primary frequency modulation can be achieved.

[0054] In an optional embodiment, the control unit is responsible for receiving the power grid dispatching instruction, monitoring the power grid frequency and the operation state of the compressor, and controlling the actions of the frequency converter and the intake valve. The control unit generally includes a central processing unit, a data acquisition module, and a communication module.

[0055] In an optional embodiment, the detection device is used to monitor key parameters such as grid frequency, compressor speed, and intake air flow in real time, and feed back this data to the control unit.

[0056] In an optional embodiment, the safety protection device includes overload protection, overheat protection, pressure protection, etc., to ensure that the system can safely shut down or resume normal operation in case of anomalies.

[0057] In an optional embodiment, obtaining the first grid dispatching instruction and obtaining the first target power value according to the first grid dispatching instruction includes:

[0058] Using intelligent parsing and processing technologies to quickly parse and process the received dispatching instruction to generate corresponding control commands. The intelligent parsing technology includes natural language processing and rule engines.

[0059] In an optional embodiment, according to the urgency of the grid dispatching instruction, dynamically adjust the communication priority to ensure that high-priority dispatching instructions are preferentially processed in case of emergencies.

[0060] In an optional embodiment, the grid dispatching instruction is collected in real time through a sensor, and the target power is received from the grid dispatching center.

[0061] In the embodiment of the present application, the specific operation of obtaining the first target power value according to the first grid dispatching instruction may be

[0062] First, the system receives the dispatching instruction from the grid dispatching center through a preset communication interface, and this instruction is usually transmitted in digital or text form.

[0063] Next, the built-in parsing module will preliminarily parse the instruction to identify key information therein, such as the target power value, execution time, etc.

[0064] Subsequently, the system inputs the parsed data into a preset algorithm model, and this model will perform rapid calculations and optimizations in combination with the actual operating conditions of the current grid.

[0065] Finally, the algorithm model outputs an optimal target power value to ensure that the system can maintain efficient and stable operation while meeting the grid dispatching requirements. This process not only improves the response speed but also enhances the flexibility and reliability of the system.

[0066] Exemplarily, specific numerical values are used to illustrate as follows:

[0067] For example, assume that the instruction issued by the power grid dispatching center requires the system to adjust the output power to 50 megawatts within the next hour. The system first receives this instruction through the communication interface and converts it into a digitally recognizable signal within the system. Then the parsing module is activated to extract information such as the target power value of 50 megawatts and the execution time. Next, this data is input into the algorithm model, which comprehensively considers the current load condition of the power grid, the energy storage state of the energy storage system, and external environmental factors. After a series of complex calculations, the model finally determines the optimal power adjustment strategy, which may include gradually increasing the power in stages to avoid impacting the power grid. Finally, the system executes according to the optimized strategy to ensure that the output target of 50 megawatts is smoothly and stably achieved within the specified time.

[0068] It should be noted that obtaining the first power grid dispatching instruction and obtaining the first target power value according to the first power grid dispatching instruction can accurately respond to the real-time demand of the power grid and ensure that the power output by the system highly matches the power grid dispatching instruction. This not only helps to maintain the stable operation of the power grid but also effectively avoids energy waste and equipment loss caused by power fluctuations. In addition, by pre-obtaining the target power value, the system can perform resource allocation and strategy optimization in advance, thereby improving the response speed and adjustment efficiency, and further enhancing the adaptability and reliability of the system. The implementation of this method enables the compressed air energy storage system to always maintain an efficient and stable operating state in a complex and changeable power grid environment.

[0069] S102, preset a first dynamic power threshold, and make a first judgment based on the first target power value and the first dynamic power threshold;

[0070] In an optional embodiment, the first dynamic power threshold can be automatically calculated by an algorithm built into the system. This algorithm comprehensively considers factors such as the current power grid load condition, historical data, and a preset safety factor.

[0071] In an optional embodiment, the algorithm first analyzes the change trend of the real-time power grid load, combines the power fluctuation situation in the historical data, and determines a preliminary dynamic power threshold. Subsequently, the system adjusts this threshold according to the preset safety factor to ensure that the system can flexibly respond to various emergencies within a safe range during actual operation. In this way, the first dynamic power threshold can not only dynamically adapt to the actual demand of the power grid but also effectively guarantee the stability and safety of the system.

[0072] In an optional embodiment, it is also possible to continuously monitor the deviation between the actual power output and the first dynamic power threshold and timely adjust the control strategy according to the deviation situation to ensure that the system always operates in an optimal state.

[0073] In the embodiments of the present application, the first dynamic power threshold includes a first power threshold and a second power threshold;

[0074] Set a first load critical value;

[0075] Judge the relationship between the system load and the first load critical value, and select the first power threshold or the second power threshold according to the relationship between the system load and the first load critical value.

[0076] In an alternative embodiment, setting the first load critical value can be based on the current operating state and historical data of the system, and dynamically adjust this critical value to adapt to different working condition requirements. Specifically, when the system is in the peak load period, the first load critical value will be correspondingly increased to ensure that the system can still operate stably under high load; while in the low load period, this critical value will be decreased to optimize the energy utilization efficiency and reduce unnecessary energy consumption.

[0077] In an alternative embodiment, the system will also monitor the load change situation in real time. Once an abnormal fluctuation is detected, the emergency plan will be immediately activated to adjust the power output to ensure the safety and reliability of the system. Through this flexible method of setting the load critical value, the system can maintain an efficient and stable operating state under different working conditions.

[0078] In an alternative embodiment, the first load critical value can be set according to the data obtained from experiments. Combining the operation test results of the system under different working conditions, comprehensively analyze the performance of the system under various load conditions to ensure the edge load critical value of the area. This data-driven setting method not only improves the adaptability and robustness of the system, but also can continuously optimize the accuracy of the critical value according to the actual operation data.

[0079] In an alternative embodiment, the introduction of experimental data also allows the system to conduct simulation tests under specific extreme working conditions to further verify the rationality and effectiveness of the critical value, ensuring that the system can still maintain an efficient and stable operating state when facing a complex and changeable working environment. Through this multi-level verification and optimization, the overall performance of the system is significantly improved, providing a solid theoretical and technical support for practical applications.

[0080] In the embodiment of the present application, the first load critical value is not restricted. In the present application, 50% is selected, and other technicians can adjust it according to actual needs. For example, in some high-load application scenarios, technicians can set the first load critical value to 60% or higher to meet greater power requirements; while in low-load scenarios, the critical value can be appropriately reduced, such as set to 40% or lower, to optimize the energy efficiency ratio of the system. This flexible setting strategy enables the system to adaptively adjust operating parameters according to different application environments and load requirements, thereby maximizing energy utilization efficiency while ensuring system stability. In addition, through the analysis and feedback of a large amount of actual operation data, the system can also achieve dynamic adjustment of the critical value, further optimizing the operating performance and reliability of the system.

[0081] In the embodiment of the present application, the preset first dynamic power threshold, the first determination based on the first target power value and the first dynamic power threshold includes:

[0082] Determine a first power change amount according to the first target power value and the real-time operating power;

[0083] Judge the relationship between the first power change amount and the first dynamic power threshold;

[0084] Make a first determination according to the relationship between the first power change amount and the first dynamic power threshold.

[0085] In an alternative embodiment, the first power change amount can be determined by the difference between the first target power value and the real-time operating power.

[0086] It should be noted that presetting the first dynamic power threshold and making a first determination based on the first target power value and the first dynamic power threshold can effectively avoid the problem of unstable performance caused by excessive power fluctuations during the operation of the system. By presetting the dynamic power threshold, the system can give early warnings and make adjustments in a timely manner when approaching the critical state to ensure operation within a safe range. In addition, this judgment mechanism can also reduce unnecessary energy losses and improve the overall energy efficiency of the system. In practical applications, this strategy significantly improves the reliability and economy of the system, extends the service life of the equipment, and reduces the maintenance cost.

[0087] S103, determine an adjustment operation according to the first determination result, and the adjustment operation includes a first adjustment and a second adjustment.

[0088] In an alternative embodiment, the first adjustment and the second adjustment can be flexibly selected according to different power change situations. Specifically, when the first power change amount exceeds the first dynamic power threshold, the system will activate the first adjustment mode, and by adjusting the flow rate and pressure of the compressed air, rapidly reduce the operating power to prevent the system from overloading. On the contrary, if the first power change amount is lower than the first dynamic power threshold, the system will enter the second adjustment mode, and at this time the system will optimize the utilization efficiency of the compressed air to ensure stable operation under low power conditions. This dual-mode adjustment strategy not only improves the adaptability of the system, but also further enhances the overall operating safety and economy.

[0089] In an alternative embodiment, the first adjustment and the second adjustment can also be adaptively adjusted according to the real-time monitored environmental parameters. For example, when there are significant changes in the environmental temperature or humidity, the system will automatically correct the adjustment parameters to adapt to the new working conditions. In addition, the system also has a fault diagnosis function, which can issue an alarm in a timely manner when detecting abnormal conditions and automatically switch to the safe mode to ensure the stable operation of the system. This intelligent adjustment mechanism not only improves the flexibility and robustness of the system, but also provides users with a more convenient and reliable operating experience.

[0090] In an alternative embodiment, the first adjustment and the second adjustment can also be dynamically adjusted according to the real-time monitored environmental parameters. For example, when it is detected that there are fluctuations in the external wind speed or air pressure, the system will immediately analyze the impact of these changes on the compressed air energy storage efficiency and accordingly adjust the adjustment strategy to ensure that the system can maintain the best working state under different environmental conditions. In addition, the system also integrates an intelligent learning algorithm, which can continuously optimize the adjustment parameters through the analysis of historical data to improve the prediction accuracy of future working conditions. This highly intelligent adjustment method not only greatly improves the operating efficiency of the system, but also significantly extends the service life of the equipment and reduces the maintenance cost.

[0091] In the embodiment of the present application, the first adjustment and the second adjustment include:

[0092] The first adjustment is a power adjustment strategy for first-level changes;

[0093] The second adjustment is a power adjustment strategy for second-level changes.

[0094] In the embodiment of the present application, the first-level change is a large-scale change, and the second-level change is a small-scale change. The first-level change usually involves a significant fluctuation in the overall load of the system, such as a large increase or decrease in the grid load. At this time, the first adjustment strategy will respond quickly and ensure that the system can smoothly cope with this large-scale power demand change by adjusting the storage and release rates of the compressed air.

[0095] In the embodiments of the present application, the secondary changes are more reflected in local or short-term minute fluctuations, such as slight fluctuations in instantaneous load. The second adjustment strategy is more refined. By finely tuning relevant parameters, the instantaneous response ability of the system is optimized to ensure that the system operates under high-precision control.

[0096] It should be noted that this design concept of hierarchical adjustment enables the system to achieve efficient and stable power adjustment in changes of different scales and amplitudes, thereby further improving the performance and reliability of the overall system.

[0097] Exemplarily, the power grid dispatching instruction is collected in real time through a sensor, and the target power P is received from the power grid dispatching center target , and the power value P under the current operating state is read current . Calculate the power change amount ΔP, ΔP = P target - P current ;

[0098] Dynamically adjust the threshold according to the system load:

[0099]

[0100] Compare the power change amount with the threshold:

[0101] If |ΔP| > T, it is considered a large-scale change, and the compressor speed is adjusted to the target power value P through a frequency converter target , and the operating state of the compressor is monitored in real time to ensure that the speed smoothly transitions to the target value;

[0102] If |ΔP| ≤ T, it is considered a small-scale change, and the intake valve opening is adjusted through the intake valve controller to control the intake air flow, thereby adjusting the output power of the compressor. The intake air flow and the output power of the compressor are monitored in real time to ensure that the target power value P is reached target .

[0103] In the embodiments of the present application, the determining the adjustment operation according to the first judgment result includes:

[0104] If the first power change amount is greater than the first dynamic power threshold, perform the first adjustment;

[0105] If the first power change amount is not greater than the first dynamic power threshold, perform the second adjustment.

[0106] In the embodiments of the present application, the first adjustment includes:

[0107] After obtaining the first target power value, obtain the first target speed of the compressor according to the first target power value;

[0108] Adjust the first output power of the frequency converter according to the first target speed, so that the first actual speed of the compressor is the same as the first target speed.

[0109] Exemplarily, receive a scheduling instruction: receive a first target power value P from the power grid dispatching center target .

[0110] Calculate the target speed: Based on the compressor characteristic curve, calculate the speed N required to reach the target power target . This process is completed by looking up a pre-stored power-speed mapping table or using a mathematical model.

[0111] Adjust the output of the frequency converter: Adjust the output frequency f of the frequency converter output so that the actual speed of the compressor is equal to the target speed.

[0112] In an alternative embodiment, the calculation of the required target speed includes:

[0113] Look up a pre-stored power-speed mapping table and obtain the corresponding target speed according to the target power value;

[0114] Alternatively, use a mathematical model to calculate the target speed, and the mathematical model includes but is not limited to:

[0115] P = kN 3

[0116] where P is the target power, k is a constant depending on the design parameters of the compressor. N is the target speed.

[0117] In an alternative embodiment, the pre-stored power-speed mapping table includes multiple power values and their corresponding optimal speed values, and the mapping table is established through experimental data and simulation results.

[0118] In an alternative embodiment, the mathematical model further includes a correction coefficient for correcting errors caused by environmental factors, and the correction coefficient is dynamically adjusted through historical data and real-time data.

[0119] In the embodiment of the present application, the second adjustment includes:

[0120] Adjust the opening of the intake valve through the intake valve controller to control the intake air flow;

[0121] Adjust the output power of the compressor, and monitor the intake air flow and the output power of the compressor in real time so that they reach the first target power value.

[0122] In summary, the present invention proposes a method for regulating the power of a compressed air energy storage system, which obtains a first power grid dispatching instruction and obtains a first target power value according to the first power grid dispatching instruction; a first dynamic power threshold is preset, and a first judgment is made based on the first target power value and the first dynamic power threshold; an adjustment operation is determined according to the first judgment result, and the adjustment operation includes a first adjustment and a second adjustment. By dynamically adjusting the power threshold and the adjustment strategy, the response speed and adjustment accuracy of the compressed air energy storage system to the power grid dispatching instruction are significantly improved.

[0123] Specifically, the preset first dynamic power threshold can be flexibly selected according to the system load condition to ensure optimal regulation in different operating states. The first adjustment and the second adjustment strategies are respectively aimed at power changes of different levels, further refining the adjustment means, so that the system can maintain efficient operation in different situations. In addition, by real-time monitoring and adjusting the intake air flow rate and the compressor output power, it is ensured that the actual operating power of the system is highly consistent with the target power, effectively avoiding the problems of adjustment lag and over-adjustment in traditional fixed control methods. Overall, the present invention not only improves the stability and efficiency of the compressed air energy storage system, but also extends the service life of the equipment, reduces the operation and maintenance costs, and provides strong support for the stable operation of the power grid. By dynamically adjusting the threshold, the system can respond to the power grid dispatching instruction faster. Especially when the system load is light, setting a smaller threshold can improve the adjustment sensitivity and ensure that the system reaches the target power value in a short time. For large-scale power changes, by adjusting the compressor speed through a frequency converter, the power output can be quickly adjusted, shortening the response time and improving the dynamic response ability of the system. Different thresholds are set in the light load and heavy load states, so that the system can adopt the most suitable adjustment strategy in different operating states. This not only improves the adjustment accuracy, but also reduces the unnecessary adjustment times and avoids the instability caused by the frequent switching of the system. For small-amplitude power changes, by adjusting the opening degree of the intake valve to control the intake air flow rate, the output power of the compressor can be adjusted more precisely to ensure that the system can also maintain a stable operating state within a small range. By dynamically adjusting the threshold, the system can set a larger threshold in the heavy load state, reduce the unnecessary adjustment times, reduce the mechanical wear and equipment fatigue, and extend the service life of the equipment. The system can select the most suitable adjustment method according to the actual operating state and external conditions to ensure that the equipment is always operating in the best working state and avoid premature aging and failure of the equipment caused by frequent adjustment.

[0124] Embodiment 2

[0125] In this embodiment, a power regulation system for a compressed air energy storage system is further provided, including:

[0126] A data acquisition module, configured to acquire a first power grid dispatching instruction and obtain a first target power value according to the first power grid dispatching instruction;

[0127] A judgment module, configured to preset a first dynamic power threshold and perform a first judgment based on the first target power value and the first dynamic power threshold;

[0128] An adjustment module, configured to determine an adjustment operation according to the first judgment result, where the adjustment operation includes a first adjustment and a second adjustment.

[0129] Each of the above unit modules may be embedded in a processor in a computer device in a hardware form or be independent of the processor, or may be stored in a memory in the computer device in a software form, so as to facilitate the processor to call and execute the operations corresponding to the above respective modules.

[0130] This embodiment further provides a computer device, which may be a terminal, and its internal structure diagram may be as Figure 2 shown. The computer device includes a processor, a memory, a communication interface, a display screen, and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner may be implemented through WIFI, a carrier network, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements a method for adjusting the power of a compressed air energy storage system. The display screen of the computer device may be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device may be a touch layer covering the display screen, or may be a button, a trackball, or a touchpad provided on the housing of the computer device, or may also be an external keyboard, a touchpad, or a mouse, etc.

[0131] This embodiment further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0132] Acquire a first power grid dispatching instruction and obtain a first target power value according to the first power grid dispatching instruction;

[0133] Preset a first dynamic power threshold and perform a first judgment based on the first target power value and the first dynamic power threshold;

[0134] Determine an adjustment operation according to the first judgment result, where the adjustment operation includes a first adjustment and a second adjustment.

[0135] Embodiment 3

[0136] Refer to Figure 1 - Figure 2 , which is an embodiment of the present invention. A method and system for power regulation of a compressed air energy storage system are provided. To verify the beneficial effects of the present invention, scientific demonstration is carried out through experiments.

[0137] A 10MW compressed air energy storage system is set up to assist the power grid in peak shaving and frequency regulation. The system includes a compressor, a gas storage device, a generator, and a control system. The control system is responsible for real-time monitoring of the system operating status and external conditions, dynamically adjusting the threshold, and selecting a suitable regulation method to regulate the power of the compressor.

[0138] The parameters are set as follows:

[0139] Current power value P current : The initial value is set to 4MW.

[0140] Light load threshold T light : 0.5MW.

[0141] Heavy load threshold T heavy : 2MW.

[0142] Load critical value L critical : 50%

[0143] Real-time monitoring and data acquisition:

[0144] Grid dispatching instruction: Target power value P target = 3MW.

[0145] System load L: 40%.

[0146] Calculate the power change amount ΔP = -1MW.

[0147] The current system load L = 40%. Since L < Lcritical = 50%, the threshold T = T light = 0.5MW.

[0148] Compare the power change amount and the threshold: ∣ΔP∣ = 1MW > T = 0.5MW. Therefore, it is considered a large-scale change.

[0149] Adjust the compressor speed to the target power value P target = 3MW through a frequency converter.

[0150] Real-time monitor the operating status of the compressor to ensure a smooth transition of the speed to the target value.

[0151] It should be noted that by dynamically adjusting the threshold, the system can respond to grid dispatching instructions faster. Especially when the system load is light, setting a smaller threshold can improve the regulation sensitivity and ensure that the system reaches the target power value within a short time. For large-scale power changes, by adjusting the compressor speed through the frequency converter, the power output can be quickly adjusted, the response time can be shortened, and the dynamic response ability of the system can be improved.

[0152] It should also be noted that different thresholds are set in light load and heavy load states, enabling the system to adopt the most suitable regulation strategy in different operating states. This not only improves the regulation accuracy but also reduces unnecessary regulation times and avoids the instability caused by frequent system switching. For small power changes, by adjusting the intake valve opening to control the intake air flow, the output power of the compressor can be more finely adjusted to ensure that the system can maintain a stable operating state within a small range.

[0153] It should also be noted that by dynamically adjusting the threshold, the system can set a larger threshold in the heavy load state, reduce unnecessary regulation times, reduce mechanical wear and equipment fatigue, and extend the service life of the equipment. The system can select the most suitable regulation method according to the actual operating state and external conditions to ensure that the equipment always operates in the best working state and avoid premature aging and failure of the equipment caused by frequent regulation.

[0154] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

[0155] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of the present application can be implemented in various computer languages, for example, object-oriented programming languages such as Java and interpreted scripting languages such as JavaScript.

[0156] This application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, and the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in one or more of the flows Figure 1 one or more of the flows and / or blocks Figure 1 or means for implementing the functions specified in one or more of the blocks.

[0157] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including instruction means, and the instruction means implement the functions specified in one or more of the flows Figure 1 one or more of the flows and / or blocks Figure 1 or means for implementing the functions specified in one or more of the blocks.

[0158] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more of the flows Figure 1 one or more of the flows and / or blocks Figure 1 or means for implementing the functions specified in one or more of the blocks.

[0159] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concepts. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications falling within the scope of the present application.

[0160] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

1. A power regulation method for a compressed air energy storage system, characterized in that: include: Obtaining a first power grid dispatching instruction, and obtaining a first target power value according to the first power grid dispatching instruction; Preset a first dynamic power threshold, and perform a first judgment based on the first target power value and the first dynamic power threshold; An adjustment operation is determined according to the first judgment result, where the adjustment operation includes a first adjustment and a second adjustment.

2. The power regulation method of the compressed air energy storage system according to claim 1, characterized in that: The first dynamic power threshold includes a first power threshold and a second power threshold; Setting a first load threshold; The relationship between the system load and the first load critical value is determined, and the first power threshold or the second power threshold is selected according to the relationship between the system load and the first load critical value.

3. The power regulation method of the compressed air energy storage system according to claim 2, characterized in that: The first adjustment and the second adjustment include: The first regulation is a power regulation strategy for a level one change; The second regulation is a power regulation strategy for secondary changes.

4. The power regulation method of the compressed air energy storage system according to claim 3, characterized in that: The preset first dynamic power threshold, performing a first judgment based on the first target power value and the first dynamic power threshold, comprises: Determining a first power change according to the first target power value and the real-time operating power; Determining a relationship between the first power change and the first dynamic power threshold; A first judgment is performed based on a relationship between the first power change amount and the first dynamic power threshold.

5. The power regulation method of the compressed air energy storage system according to claim 4, characterized in that: Determining the adjustment operation according to the first judgment result includes: If the first power change is greater than the first dynamic power threshold, performing a first adjustment; If the first power variation is not greater than the first dynamic power threshold, a second adjustment is performed.

6. The power regulation method of the compressed air energy storage system according to claim 5, characterized in that: The first adjustment includes: After the first target power value is obtained, a first target speed of the compressor is obtained according to the first target power value; The first output power of the inverter is adjusted according to the first target speed so that the first actual speed of the compressor is the same as the first target speed.

7. The power regulation method of the compressed air energy storage system according to claim 6, characterized in that: The second adjustment includes: The intake valve opening is adjusted by the intake valve controller to control the intake flow rate; The output power of the compressor is adjusted, and the intake air flow and the output power of the compressor are monitored in real time so that the first target power value is reached.

8. A power regulation system for a compressed air energy storage system, characterized in that: include: A data acquisition module, used to acquire a first power grid dispatching instruction, and acquire a first target power value according to the first power grid dispatching instruction; A judgment module, configured to preset a first dynamic power threshold, and perform a first judgment based on the first target power value and the first dynamic power threshold; The adjustment module is used to determine an adjustment operation according to the first judgment result, and the adjustment operation includes a first adjustment and a second adjustment.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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