A method and system for regulating the rotational speed of an expander of a compressed air energy storage system

Abstract

The application discloses a kind of expansion machine rotating speed regulating method and system of compressed air energy storage system, it is related to compressed air energy storage equipment control technical field, obtains the rotating speed of expansion machine in compressed air energy storage system, carries out benchmark optimization control to rotating speed by first optimization control module, obtains benchmark pressure, carries out opening optimization control to benchmark pressure by second optimization control module, obtains opening adjustment instruction, carries out rotating speed regulation to expansion machine by opening adjustment instruction.The technical problem that the rotating speed of expansion machine is adjusted mainly by PID controller in prior art, but in the complex operating environment of compressed air energy storage power station, the controller is difficult to avoid being influenced by random noise, leading to its control performance decline, reduces the operating reliability of compressed air energy storage system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressed air energy storage device control, and particularly relates to a method and system for regulating the rotating speed of an expander of a compressed air energy storage system. BACKGROUND

[0002] Compressed air energy storage is one of the key supporting technologies for building a new power system mainly based on new energy and realizing large-scale energy storage. Compressed air energy storage mainly uses the surplus power during the low valley of power system load to drive an air compressor to compress air into a large-capacity air storage chamber, i.e., to convert electric energy into storable compressed air potential energy. When the power generation capacity of the system is insufficient, the compressed air is used to drive an expander to generate power, thereby meeting the system peak shaving needs. Compressed air energy storage has the advantages of large capacity, long service life and good economy. However, due to the imperfection of the compressed air energy storage system, especially the fixed parameters used to regulate the rotating speed of the expander, the rotating speed of the expander cannot be accurately controlled, which leads to unstable output power of the system and low energy storage and release efficiency.

[0003] At present, the existing technology mainly regulates the rotating speed of the expander through a PID controller. However, in the complex environment of a compressed air energy storage power station, the PID controller is inevitably affected by random noise, which reduces the control performance of the PID controller on the expander and the reliability of the compressed air energy storage system. SUMMARY

[0004] The present application provides a method and system for regulating the rotating speed of an expander of a compressed air energy storage system, which solves the technical problem that the existing technology mainly regulates the rotating speed of the expander through a PID controller, but in the complex environment of a compressed air energy storage power station, the PID controller is inevitably affected by random noise, which reduces the control performance of the PID controller on the expander and the reliability of the compressed air energy storage system.

[0005] The first aspect of the present application provides a method for regulating the rotating speed of an expander of a compressed air energy storage system, comprising:

[0006] obtaining the rotating speed of the expander in the compressed air energy storage system, and inputting the rotating speed into a preset unit optimization control model, wherein the unit optimization control model comprises a first optimization control module and a second optimization control module;

[0007] performing benchmark optimization control on the rotating speed of the expander through the first optimization control module to obtain a benchmark pressure;

[0008] performing opening degree optimization control on the benchmark pressure through the second optimization control module to obtain an opening degree adjustment instruction;

[0009] The speed of the expander is adjusted by the opening degree adjustment instruction.

[0010] Optionally, the first optimization control module comprises a first difference calculator and a first optimization controller, and the step of performing reference optimization control on the unit speed by the first optimization control module to obtain a reference pressure comprises:

[0011] inputting the unit speed and a pre-acquired reference speed into the first difference calculator to perform difference calculation to obtain a speed deviation value;

[0012] performing optimization control on the speed deviation value by the first optimization controller to obtain the reference pressure, wherein the optimization controller comprises a first proportional controller, an integral controller, a filter differential controller, a second proportional controller and an addition calculator.

[0013] Optionally, the step of performing optimization control on the speed deviation value by the first optimization controller to obtain the reference pressure comprises:

[0014] performing proportional control on the speed deviation value by the first proportional controller to obtain a first proportional value;

[0015] performing proportional control on the first proportional value by the second proportional controller to obtain a second proportional value;

[0016] performing integral calculation on the first proportional value by the integral controller to obtain a first integral value;

[0017] performing filter differential calculation on the first proportional value by the filter differential controller to obtain a first filter differential value, wherein the filter differential controller comprises a combined differentiator, a phase compensation filter and a noise filter;

[0018] inputting the second proportional value, the first integral value and the first filter differential value into the addition calculator to perform addition calculation to obtain the reference pressure.

[0019] Optionally, the step of performing filter differential calculation on the first proportional value by the filter differential controller to obtain the first filter differential value comprises:

[0020] performing combined differential calculation on the first proportional value by the combined differentiator to obtain a first filter value;

[0021] performing phase optimization control on the first filter value by the phase compensation filter to obtain a second filter value;

[0022] performing noise filtering processing on the second filter value by the noise filter to obtain the first filter differential value.

[0023] Optionally, the second optimization control module comprises a second difference calculator and a second optimization controller, and the step of performing opening degree optimization control on the reference pressure by the second optimization control module to obtain an opening degree adjustment instruction comprises:

[0024] inputting the reference pressure and a pre-acquired adjustment valve pressure into the second difference calculator to perform difference calculation to obtain a pressure deviation value;

[0025] inputting the pressure deviation value into the second optimization controller to perform optimization control to obtain the opening degree adjustment instruction.

[0026] Optionally, the step of adjusting the rotation speed of the expander by the opening degree adjustment instruction comprises:

[0027] issuing the opening degree adjustment instruction to a proportional adjustment valve associated with the expander, so that the proportional adjustment valve is executed in response to the opening degree adjustment instruction and outputs high-pressure air after execution;

[0028] inputting the high-pressure air into the expander after passing through a heat exchanger associated with the expander, so that the rotation speed of the expander is adjusted to a rated rotation speed.

[0029] The second aspect of the present application provides an expander rotation speed adjustment system of a compressed air energy storage system, comprising:

[0030] a collection module configured to acquire a unit rotation speed of an expander in a compressed air energy storage system and input the unit rotation speed into a preset unit optimization control model, wherein the unit optimization control model comprises a first optimization control module and a second optimization control module;

[0031] a reference control module configured to perform reference optimization control on the unit rotation speed by the first optimization control module to obtain a reference pressure;

[0032] an opening degree control module configured to perform opening degree optimization control on the reference pressure by the second optimization control module to obtain an opening degree adjustment instruction;

[0033] an adjustment module configured to adjust the rotation speed of the expander by the opening degree adjustment instruction.

[0034] The third aspect of the present application provides an electronic device comprising a memory and a processor, wherein the memory stores a computer program, and the computer program is executed by the processor to make the processor perform the steps of the expander rotation speed adjustment method of the compressed air energy storage system according to any one of the above aspects.

[0035] The fourth aspect of the present application provides a computer readable storage medium, which stores a computer program, and the computer program is executed to implement the method for regulating the rotating speed of the expander of the compressed air energy storage system according to any one of the preceding aspects.

[0036] The fifth aspect of the present application provides a computer program product, which comprises a computer program stored on a non-transitory computer readable storage medium, and the computer program comprises program instructions, wherein when the program instructions are executed by a computer, the computer is caused to execute the method for regulating the rotating speed of the expander of the compressed air energy storage system according to any one of the preceding aspects.

[0037] From the above technical solutions, the present application has the following advantages:

[0038] The present application obtains the rotating speed of the expander of the compressed air energy storage system, performs benchmark optimization control on the rotating speed of the expander by the first optimization control module to obtain a benchmark pressure, performs opening optimization control on the benchmark pressure by the second optimization control module to obtain an opening adjustment instruction, and adjusts the rotating speed of the expander according to the opening adjustment instruction, thereby overcoming the technical problem that the prior art mainly uses a PID controller to adjust the rotating speed of the expander, but the PID controller is difficult to avoid being affected by random noise in the complex environment of the compressed air energy storage power station, resulting in a decline in the control performance of the PID controller on the expander. Compared with the traditional PID controller, the first optimization control module and the second optimization control module have superior random disturbance amplification suppression capability, reduce the interference of random noise on the rotating speed adjustment, and improve the reliability of the compressed air energy storage system. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0040] Figure 1 A step flow chart of the method for regulating the rotating speed of the expander of the compressed air energy storage system according to the first embodiment of the present application is provided.

[0041] Figure 2 A step flow chart of the method for regulating the rotating speed of the expander of the compressed air energy storage system according to the second embodiment of the present application is provided.

[0042] Figure 3 A structure schematic diagram of the unit optimization control model according to the second embodiment of the present application is provided.

[0043] Figure 4 The structural schematic diagram of the optimized controller provided for the second embodiment of the present application;

[0044] Figure 5 The result schematic diagram of the filter differentiator provided for the second embodiment of the present application;

[0045] Figure 6 The phase frequency characteristic comparison schematic diagram of the filter differentiator and the ideal differentiator provided for the second embodiment of the present application;

[0046] Figure 7 The amplitude frequency characteristic comparison schematic diagram of the filter differentiator and the ideal differentiator provided for the second embodiment of the present application;

[0047] Figure 8 The noise interference input signal schematic diagram of the filter differentiator provided for the second embodiment of the present application;

[0048] Figure 9 The noise interference output signal schematic diagram of the filter differentiator provided for the second embodiment of the present application;

[0049] Figure 10 The structural block diagram of the expander speed regulation system of the compressed air energy storage system provided for the third embodiment of the present application;

[0050] Figure 11 The structural block diagram of the electronic device provided for the fourth embodiment of the present application. DETAILED DESCRIPTION

[0051] The embodiment of the present application provides an expander speed regulation method and system of a compressed air energy storage system, which is used for solving the technical problem that in the prior art, the expander is mainly regulated in speed through a PID controller, but in the complex environment of the compressed air energy storage power station, the PID controller is inevitably affected by random noise, so that the control performance of the PID controller on the expander is reduced, and the reliability of the compressed air energy storage system is reduced.

[0052] In order to make the purpose, characteristics and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the following described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0053] Please refer to Figure 1 , Figure 1 The step flow chart of the expander speed regulation method of the compressed air energy storage system provided for the first embodiment of the present application.

[0054] The application provides a method for regulating the rotating speed of an expander of a compressed air energy storage system, which comprises the following steps:

[0055] In the embodiment of the application, the rotating speed of the expander of the compressed air energy storage system is obtained in real time, and the rotating speed is input into a preset unit optimization control model, wherein the unit optimization control model comprises a first optimization control module and a second optimization control module.

[0056] The rotating speed of the unit refers to the real-time rotating speed of the expander connected to the generator.

[0057] In the embodiment of the application, the rotating speed of the expander of the compressed air energy storage system is obtained in real time, and the rotating speed is input into a preset unit optimization control model, wherein the unit optimization control model comprises a first optimization control module and a second optimization control module.

[0058] In the embodiment of the application, the rotating speed of the expander of the compressed air energy storage system is obtained in real time, and the rotating speed is input into a preset unit optimization control model, wherein the unit optimization control model comprises a first optimization control module and a second optimization control module.

[0059] In the embodiment of the application, the rotating speed of the expander of the compressed air energy storage system is obtained in real time, and the rotating speed is input into a preset unit optimization control model, wherein the unit optimization control model comprises a first optimization control module and a second optimization control module.

[0060] In the embodiment of the application, the rotating speed of the expander of the compressed air energy storage system is obtained in real time, and the rotating speed is input into a preset unit optimization control model, wherein the unit optimization control model comprises a first optimization control module and a second optimization control module.

[0061] In the embodiment of the application, the rotating speed of the expander of the compressed air energy storage system is obtained in real time, and the rotating speed is input into a preset unit optimization control model, wherein the unit optimization control model comprises a first optimization control module and a second optimization control module.

[0062] In the embodiment of the application, the rotating speed of the expander of the compressed air energy storage system is obtained in real time, and the rotating speed is input into a preset unit optimization control model, wherein the unit optimization control model comprises a first optimization control module and a second optimization control module.

[0063] In the embodiment of the application, the rotating speed of the expander of the compressed air energy storage system is obtained in real time, and the rotating speed is input into a preset unit optimization control model, wherein the unit optimization control model comprises a first optimization control module and a second optimization control module.

[0064] In this embodiment of the invention, by acquiring the unit speed of the expander in the compressed air energy storage system, a first optimization control module performs benchmark optimization control on the unit speed to obtain a benchmark pressure. Then, a second optimization control module performs opening optimization control on the benchmark pressure to obtain an opening adjustment command. The expander speed is then adjusted according to the opening adjustment command. This overcomes the technical problem in existing technologies where the expander speed is mainly adjusted using a PID controller. However, in the complex environment of a compressed air energy storage power station, the PID controller is inevitably affected by random noise, leading to a decrease in the PID controller's control performance over the expander. Compared with traditional PID controllers, the first and second optimization control modules have superior ability to suppress random interference amplification in the differential element, reducing the interference of random noise on speed adjustment and improving the reliability of the compressed air energy storage system.

[0065] Please see Figure 2 , Figure 2 This is a flowchart illustrating the steps of an expander speed adjustment method for a compressed air energy storage system according to Embodiment 2 of the present invention.

[0066] This invention provides a method for adjusting the expander speed of a compressed air energy storage system, comprising:

[0067] Step 201: Obtain the unit speed of the expander in the compressed air energy storage system, and input the unit speed into the preset unit optimization control model, wherein the unit optimization control model includes a first optimization control module and a second optimization control module.

[0068] In the embodiments of the present invention, see Figure 3 As shown, the unit speed of the expander connected to the generator in the compressed air energy storage system is obtained, and the unit speed is input into the preset unit optimization control model (i.e., expander speed controller). The unit optimization control model includes a first optimization control module and a second optimization control module.

[0069] Step 202: The unit speed is optimized and controlled by the first optimization control module to obtain the reference pressure;

[0070] Furthermore, the first optimization control module includes a first difference calculator and a first optimization controller, and step 202 includes the following sub-steps:

[0071] S11. Input the unit speed and the pre-acquired reference speed into the first difference calculator to perform difference calculation and obtain the speed deviation value;

[0072] In this embodiment of the invention, the unit speed (i.e., ω) and the pre-acquired reference speed (i.e., ω) are used. * Input the first difference calculator to perform difference calculation and obtain the speed deviation value (i.e., Δω).

[0073] S12, optimizing and controlling the rotating speed deviation value by the first optimization controller to obtain the reference pressure, wherein the optimization controller comprises a first proportional controller, an integral controller, a filter differential controller, a second proportional controller and an adder.

[0074] Further, referring to Figure 4 , S12 comprises the following sub-steps:

[0075] S121, proportionally controlling the rotating speed deviation value by the first proportional controller to obtain a first proportional value;

[0076] In the embodiment of the present application, the rotating speed deviation value is input into the first proportional controller for proportional control to obtain the first proportional value.

[0077] S122, proportionally controlling the first proportional value by the second proportional controller to obtain a second proportional value;

[0078] In the embodiment of the present application, the first proportional value is input into the second proportional controller for proportional control to obtain the second proportional value.

[0079] It is worth mentioning that the second proportional control parameter K P2 is in the range of 0-2; the first proportional control parameter K P1 is selected according to the debugging of the control system.

[0080] S123, integrating the first proportional value by the integral controller to obtain a first integral value;

[0081] In the embodiment of the present application, the first proportional value is input into the integral controller for integral operation to obtain the first integral value.

[0082] S124, filter-differentiating the first proportional value by the filter differential controller to obtain a first filter-differential value, wherein the filter differential controller comprises a combined differentiator, a phase compensation filter and a noise filter;

[0083] Further, referring to Figure 5 , S124 comprises the following sub-steps:

[0084] S1241, combined differentiating the first proportional value by the combined differentiator to obtain a first filter value;

[0085] In the embodiment of the present application, the first proportional value is input into the combined differentiator for combined differential operation to obtain the first filter value.

[0086] It is worth mentioning that the transfer function of the combined differentiator is specifically:

[0087]

[0088] in, is the time constant of the filter differentiator.

[0089] S1242. The first filtered value is phase-optimized and controlled by a phase compensation filter to obtain the second filtered value;

[0090] In this embodiment of the invention, the first filtered value is input into the phase compensation filter for phase optimization control to obtain the second filtered value.

[0091] It should be noted that the transfer function of the phase compensation filter configuration is as follows:

[0092]

[0093] S1243. The second filtered value is subjected to noise filtering through a noise filter to obtain the first filtered differential value.

[0094] In this embodiment of the invention, the second filter value is input into a noise filter for noise filtering to obtain the first filter differential value.

[0095] It should be noted that the transfer function for the noise filter configuration is as follows:

[0096]

[0097] It is worth mentioning that the phase frequency and amplitude frequency characteristics of the filtered differentiator and the ideal differentiator are compared and analyzed. The transfer function of the ideal differentiator is:

[0098]

[0099] Set the time constant T of the filter differential controller and the ideal differentiator. FD =T ID =100s. See also Figure 6 and Figure 7 As shown, relative to an ideal differentiator, the filter differential controller approximates an ideal differentiator at frequencies ω less than 0.01 rad / s, with a phase of +90° and a maximum phase error of +1° / -0.3°. The high-frequency gain of an ideal differentiator tends towards infinity, while the peak gain of the filter differential controller is 11.95 dB.

[0100] Furthermore, the ability of the filter differential controller to resist random noise amplification is analyzed. If the controller's noise power gain (NPG) is less than 1, it indicates that the controller will not amplify random noise interference. Noise power gain = output noise power gain / input noise gain, calculated using the following formula:

[0101]

[0102] wherein T npg is the time for calculating the noise power gain, n out (t) is the noise interference output signal; n int (t) is the noise interference input signal. T npg = 2000s, the digital calculation interval is 0.5s, a pseudo-random signal with zero mean and a variable peak-peak value range of ±0.01, i.e. the noise interference input signal n int (t), is input at the input end of the filter-differential controller, as shown in the attached Figure 8 figure. The noise interference output signal n out (t), is obtained at the output end of the filter-differential controller, as shown in the attached Figure 9 figure. It is calculated that the noise power gain NPG of the filter-differential controller of the present application is 0.27. It can be seen that the filter-differential controller has the ability to resist random interference amplification.

[0103] S125, the second proportional value, the first integral value and the first filter-differential value are input into an adder for addition to obtain the reference pressure.

[0104] In the embodiment of the present application, the second proportional value, the first integral value and the first filter-differential value are added by the adder to obtain the reference pressure.

[0105] Step 203, the reference pressure is controlled by the second optimization control module to obtain an opening adjustment instruction;

[0106] Further, the second optimization control module comprises a second difference calculator and a second optimization controller, and step 203 comprises the following sub-steps:

[0107] S21, the reference pressure and a pre-acquired adjustment valve pressure are input into the second difference calculator for difference calculation to obtain a pressure deviation value;

[0108] The adjustment valve pressure refers to the pressure value of the proportional adjustment valve in the compressed air energy storage system at the current time.

[0109] In the embodiment of the present application, the reference pressure and the pre-acquired adjustment valve pressure are processed by the second difference calculator to obtain the pressure deviation value.

[0110] S22, the pressure deviation value is input into the second optimization controller for optimization control to obtain the opening adjustment instruction.

[0111] In the embodiment of the present application, the pressure deviation value is input into the second optimization controller for optimization control to obtain the opening adjustment instruction.

[0112] It should be noted that the processing procedure of the second optimization controller is similar to that of the first optimization controller.

[0113] It is worth mentioning that the first optimization controller and the second optimization controller have the same structure, but they play different roles in the control system of the application. The first optimization controller realizes the tracking of the unit speed reference value, and the second optimization controller realizes the tracking of the pressure reference value. The specific control parameters of the first and second optimization controllers are different and need to be set according to the debugging situation of the control system.

[0114] Step 204, the opening adjustment instruction is sent to the proportional adjusting valve associated with the expander, so that the proportional adjusting valve executes in response to the opening adjustment instruction and outputs high-pressure air after execution;

[0115] The opening adjustment instruction refers to the opening control signal of the proportional adjusting valve.

[0116] In the embodiment of the application, the opening adjustment instruction is sent to the proportional adjusting valve of the compressed air energy storage system, and the opening of the proportional adjusting valve at the front end of the expander is adjusted through the opening adjustment instruction, so as to adjust the high-pressure air pressure and flow at the inlet of the expander.

[0117] Step 205, after the high-pressure air passes through the heat exchanger associated with the expander, it is input into the expander, so that the speed of the expander is adjusted to the rated speed.

[0118] In the embodiment of the application, after the adjusted high-pressure air passes through the heat exchanger connected to the expander, high-temperature and high-pressure air is formed to drive the expander to rotate, and the speed of the expander is adjusted to be consistent with the rated speed.

[0119] In another embodiment, after the high-pressure air passes through the heat exchanger associated with the expander, high-temperature and high-pressure air is formed to drive the expander to rotate, so that the speed of the expander is adjusted to the rated speed.

[0120] In the embodiment of the application, by obtaining the unit speed of the expander in the compressed air energy storage system, the first optimization control module is used to perform reference optimization control on the unit speed to obtain a reference pressure, and then the second optimization control module is used to perform opening optimization control on the reference pressure to obtain an opening adjustment instruction, and the speed of the expander is adjusted according to the opening adjustment instruction, which overcomes the technical problem that in the prior art, the speed of the expander is mainly adjusted by the PID controller, but in the complex environment of the compressed air energy storage power station, the PID controller is inevitably affected by random noise, resulting in a decline in the control performance of the PID controller on the expander. Compared with the traditional PID controller, the first optimization control module and the second optimization control module have superior ability to suppress the amplification of random interference in the differential element, reduce the interference of random noise on the speed adjustment, and improve the reliability of the compressed air energy storage system.

[0121] Referring to Figure 10 , Figure 10 A structural block diagram of an expander rotating speed regulating system of a compressed air energy storage system is provided for Embodiment Three of the present application.

[0122] The present application provides an expander rotating speed regulating system of a compressed air energy storage system, comprising:

[0123] The acquisition module 301 is configured to acquire the rotating speed of the expander unit in the compressed air energy storage system and input the rotating speed of the expander unit into a preset expander unit optimization control model, wherein the expander unit optimization control model comprises a first optimization control module and a second optimization control module.

[0124] The reference control module 302 is configured to perform reference optimization control on the rotating speed of the expander unit by the first optimization control module to obtain a reference pressure.

[0125] The opening control module 303 is configured to perform opening optimization control on the reference pressure by the second optimization control module to obtain an opening adjustment instruction.

[0126] The regulating module 304 is configured to perform rotating speed regulation on the expander by the opening adjustment instruction.

[0127] Further, the first optimization control module comprises a first difference calculator and a first optimization controller, and the reference control module 302 comprises:

[0128] The first difference sub-module is configured to input the rotating speed of the expander unit and a pre-acquired reference rotating speed into the first difference calculator to perform difference calculation to obtain a rotating speed deviation value.

[0129] The first optimization sub-module is configured to perform optimization control on the rotating speed deviation value by the first optimization controller to obtain the reference pressure, wherein the optimization controller comprises a first proportional controller, an integral controller, a filter differential controller, a second proportional controller and an addition calculator.

[0130] Further, the first optimization sub-module comprises:

[0131] The first proportional control unit is configured to perform proportional control on the rotating speed deviation value by the first proportional controller to obtain a first proportional value.

[0132] The second proportional control unit is configured to perform proportional control on the first proportional value by the second proportional controller to obtain a second proportional value.

[0133] The integral control unit is configured to perform integral calculation on the first proportional value by the integral controller to obtain a first integral value.

[0134] The filter-differential control unit is configured to perform filter-differential operation on the first proportional value by a filter-differential controller to obtain a first filter-differential value, wherein the filter-differential controller comprises a combination differentiator, a phase compensation filter and a noise filter.

[0135] The addition operation unit is configured to perform addition operation on the second proportional value, the first integral value and the first filter-differential value by an addition operation unit to obtain the reference pressure.

[0136] Further, the filter-differential control unit comprises:

[0137] The combination differential sub-unit is configured to perform combination differential operation on the first proportional value by a combination differentiator to obtain a first filter value.

[0138] The phase optimization sub-unit is configured to perform phase optimization control on the first filter value by a phase compensation filter to obtain a second filter value.

[0139] The filter sub-unit is configured to perform noise filtering on the second filter value by a noise filter to obtain the first filter-differential value.

[0140] Further, the second optimization control module comprises a second difference operation unit and a second optimization controller, and the opening degree control module 303 comprises:

[0141] The second difference sub-module is configured to perform difference operation on the reference pressure and the pre-acquired regulating valve pressure by a second difference operation unit to obtain a pressure deviation value.

[0142] The second optimization control sub-module is configured to perform optimization control on the pressure deviation value by a second optimization controller to obtain an opening degree adjustment instruction.

[0143] Further, the regulating module 304 comprises:

[0144] The opening degree adjustment sub-module is configured to send the opening degree adjustment instruction to the proportional regulating valve associated with the expander, so that the proportional regulating valve is executed in response to the opening degree adjustment instruction and outputs high-pressure air after execution.

[0145] The rotational speed adjustment sub-module is configured to input the high-pressure air after the high-pressure air passes through the heat exchanger associated with the expander into the expander, so that the rotational speed of the expander is adjusted to the rated rotational speed.

[0146] Please refer to Figure 11 , Figure 11 A structural block diagram of an electronic device provided for the fourth embodiment of the present application.

[0147] The electronic device of the embodiment of the application comprises a memory 401 and a processor 402, the memory 401 stores a computer program, and the computer program is executed by the processor 402 to make the processor 402 execute the method for regulating the rotation speed of the expander of the compressed air energy storage system according to any one of the above-mentioned embodiments.

[0148] The memory 401 can be an electronic memory such as a flash memory, an EEPROM (Electrically Erasable Programmable Read-Only Memory), an EPROM, a hard disk or a ROM. The memory 401 has a storage space 403 for program codes 413 for executing any of the method steps described above. For example, the storage space 403 for program codes can comprise individual program codes 413 for implementing the various steps in the above-mentioned methods, respectively. These program codes can be read from or written to one or more computer program products. These computer program products comprise program code carriers such as hard disks, compact disks (CDs), memory cards or floppy disks. The program codes can be compressed in a suitable form, for example. These codes, when executed by a computing processing device, cause the computing processing device to perform the various steps in the methods described above.

[0149] The fifth embodiment of the application also provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the method for regulating the rotation speed of the expander of the compressed air energy storage system according to any one of the above-mentioned embodiments.

[0150] The sixth embodiment of the application also provides a computer program product, which comprises a computer program stored on a non-transitory computer readable storage medium, and the computer program comprises program instructions, wherein when the program instructions are executed by a computer, the computer executes the method for regulating the rotation speed of the expander of the compressed air energy storage system according to any one of the above-mentioned embodiments.

[0151] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-mentioned system, device and unit can refer to the corresponding processes in the above-mentioned method embodiments, which will not be described here.

[0152] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between apparatuses or units, and may be electrical, mechanical, or other forms.

[0153] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0154] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0155] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0156] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method of regulating the rotational speed of an expander of a compressed air energy storage system, characterized in that, The method comprises the following steps: acquiring the rotating speed of the unit of the expander in the compressed air energy storage system, and inputting the rotating speed into a preset unit optimization control model, wherein the unit optimization control model comprises a first optimization control module and a second optimization control module; performing benchmark optimization control on the rotating speed by using the first optimization control module to obtain a benchmark pressure; performing opening degree optimization control on the benchmark pressure by using the second optimization control module to obtain an opening degree adjustment instruction; adjusting the rotating speed of the expander by using the opening degree adjustment instruction; the first optimization control module comprises a first difference calculator and a first optimization controller, and the step of performing benchmark optimization control on the rotating speed by using the first optimization control module to obtain a benchmark pressure comprises: inputting the rotating speed and a pre-acquired benchmark rotating speed into the first difference calculator to perform difference calculation to obtain a rotating speed deviation value; performing optimization control on the rotating speed deviation value by using the first optimization controller to obtain a benchmark pressure, wherein the optimization controller comprises a first proportional controller, an integral controller, a filter differential controller, a second proportional controller and an addition calculator; the step of performing optimization control on the rotating speed deviation value by using the first optimization controller to obtain a benchmark pressure comprises: performing proportional control on the rotating speed deviation value by using the first proportional controller to obtain a first proportional value; performing proportional control on the first proportional value by using the second proportional controller to obtain a second proportional value; performing integral calculation on the first proportional value by using the integral controller to obtain a first integral value; performing filter differential calculation on the first proportional value by using the filter differential controller to obtain a first filter differential value, wherein the filter differential controller comprises a combined differentiator, a phase compensation filter and a noise filter; inputting the second proportional value, the first integral value and the first filter differential value into the addition calculator to perform addition calculation to obtain a benchmark pressure.

2. The method of claim 1, wherein, the step of performing filter differential calculation on the first proportional value by using the filter differential controller to obtain a first filter differential value comprises: performing combined differential calculation on the first proportional value by using the combined differentiator to obtain a first filter value; performing phase optimization control on the first filter value by using the phase compensation filter to obtain a second filter value; performing noise filter processing on the second filter value by using the noise filter to obtain a first filter differential value.

3. The method of claim 1, wherein, the second optimization control module comprises a second difference calculator and a second optimization controller, and the step of performing opening degree optimization control on the benchmark pressure by using the second optimization control module to obtain an opening degree adjustment instruction comprises: inputting the benchmark pressure and a pre-acquired adjustment valve pressure into the second difference calculator to perform difference calculation to obtain a pressure deviation value; inputting the pressure deviation value into the second optimization controller to perform optimization control to obtain an opening degree adjustment instruction.

4. The method of claim 1, wherein, the step of adjusting the rotating speed of the expander by using the opening degree adjustment instruction comprises: The opening degree adjustment instruction is sent to a proportional adjusting valve associated with the expander, the proportional adjusting valve is executed in response to the opening degree adjustment instruction, and high-pressure air after execution is output; The high-pressure air is input into the expander after passing through a heat exchanger associated with the expander, and the rotational speed of the expander is adjusted to a rated rotational speed.

5. The expander speed regulation system of a compressed air energy storage system, applied to the expander speed regulation method of any one of claims 1-4, characterized in that, The method comprises the following steps: The acquisition module is configured to acquire the rotational speed of the expander unit of the compressed air energy storage system and input the rotational speed into a preset expander unit optimization control model, wherein the expander unit optimization control model comprises a first optimization control module and a second optimization control module; The reference control module is configured to perform reference optimization control on the rotational speed of the expander unit by using the first optimization control module to obtain a reference pressure; The opening degree control module is configured to perform opening degree optimization control on the reference pressure by using the second optimization control module to obtain an opening degree adjustment instruction; The adjustment module is configured to adjust the rotational speed of the expander by using the opening degree adjustment instruction.

6. An electronic device, comprising: The computer program is stored in the memory and executed by the processor, and the processor executes the steps of the expander rotational speed adjustment method of the compressed air energy storage system according to any one of claims 1-4.

7. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed to implement the expander rotational speed adjustment method of the compressed air energy storage system according to any one of claims 1-4.

8. A computer program product, characterised in that, The computer program product comprises a computer program stored on a non-transitory computer-readable storage medium, and the computer program comprises program instructions, wherein when the program instructions are executed by a computer, the computer executes the expander rotational speed adjustment method of the compressed air energy storage system according to any one of claims 1-4.

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