Method and system for adjusting rotating speed of expansion machine of compressed air energy storage system

Abstract

The invention discloses an expansion machine rotating speed adjusting method and system of a compressed air energy storage system, and relates to the technical field of compressed air energy storage equipment control. The unit rotating speed of an expansion machine in the compressed air energy storage system is obtained, reference optimization control is conducted on the unit rotating speed through a first optimization control module, and reference pressure is obtained; and opening degree optimization control is conducted on the reference pressure through the second optimization control module, an opening degree adjusting instruction is obtained, and the rotating speed of the expansion machine is adjusted through the opening degree adjusting instruction. The technical problems that in the prior art, the rotating speed of an expansion machine is mainly adjusted through a PID controller, but under the complex operation environment of a compressed air energy storage power station, the controller is difficult to avoid being influenced by random noise, the control performance of the controller is lowered, and the operation reliability of a compressed air energy storage system is lowered are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of compressed air energy storage device control, and in particular to a method and system for regulating the speed of an expander of a compressed air energy storage system. Background Art

[0002] Compressed air energy storage is one of the key supporting technologies for building a new power system with new energy as the main body and realizing large-scale energy storage. Compressed air energy storage mainly uses the surplus power of the power system during low load to drive the air compressor and compress the air into a large-capacity air storage chamber, that is, converting electrical energy into storable compressed air potential energy. When the system's power generation capacity is insufficient, it drives the expander to generate electricity to meet the system's peak-shaving needs. Compressed air energy storage has the advantages of large capacity, long service life, and good economy. However, it is limited by the imperfection of the compressed air energy storage system, especially the expander often adjusts the expander speed according to fixed parameters when adjusting the speed, and cannot accurately control the expander speed, resulting in unstable output power of the system and low energy storage and release efficiency.

[0003] At present, the existing technology mainly uses a PID controller to adjust the speed of the expander. However, in the complex environment of a compressed air energy storage power station, the PID controller will inevitably be affected by random noise, resulting in a decrease in the control performance of the PID controller on the expander, thereby reducing the reliability of the compressed air energy storage system. Summary of the invention

[0004] The present invention provides a method and system for regulating the speed of an expander of a compressed air energy storage system, which solves the technical problem that the prior art mainly regulates the 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, resulting in a decrease in the control performance of the PID controller on the expander, thereby reducing the reliability of the compressed air energy storage system.

[0005] A first aspect of the present invention provides a method for adjusting the speed of an expander of a compressed air energy storage system, comprising:

[0006] Acquire the unit speed of the expander in the compressed air energy storage system, and input the unit speed into a preset unit optimization control model, wherein the unit optimization control model includes a first optimization control module and a second optimization control module;

[0007] Performing reference optimization control on the rotation speed of the unit through the first optimization control module to obtain a reference pressure;

[0008] The second optimization control module performs opening optimization control on the reference pressure to obtain an opening adjustment instruction;

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

[0010] Optionally, the first optimization control module includes a first difference operator and a first optimization controller, and the step of performing benchmark optimization control on the unit speed through the first optimization control module to obtain a benchmark pressure includes:

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

[0012] The rotation speed deviation value is optimized and controlled by the first optimization controller to obtain a reference pressure, wherein the optimization controller includes a first proportional controller, an integral controller, a filter differential controller, a second proportional controller and an adder.

[0013] Optionally, the step of optimizing and controlling the rotation speed deviation value by the first optimization controller to obtain a reference pressure includes:

[0014] Proportional control is performed on the rotation speed deviation value by the first proportional controller to obtain a first proportional value;

[0015] Proportionally controlling the first proportional value by the second proportional controller to obtain a second proportional value;

[0016] Performing an integration operation on the first proportional value by the integral controller to obtain a first integral value;

[0017] Performing a filter differential operation on the first proportional value through the filter differential controller to obtain a first filter differential value, wherein the filter differential controller includes a combined differentiator, a phase compensation filter and a noise filter;

[0018] The second proportional value, the first integral value and the first filtered differential value are input into the adder for addition operation to obtain a reference pressure.

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

[0020] Performing a combined differential operation on the first proportional value by the combined differentiator to obtain a first filtered value;

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

[0022] The second filtered value is subjected to noise filtering processing by the noise filter to obtain a first filtered differential value.

[0023] Optionally, the second optimization control module includes a second difference operator and a second optimization controller, and the step of performing opening optimization control on the reference pressure through the second optimization control module to obtain an opening adjustment instruction includes:

[0024] Inputting the reference pressure and the pre-acquired regulating valve pressure into the second difference operator to perform difference operation to obtain a pressure deviation value;

[0025] The pressure deviation value is input into the second optimization controller for optimization control to obtain an opening adjustment instruction.

[0026] Optionally, the step of adjusting the speed of the expander by using the opening adjustment instruction includes:

[0027] Sending the opening adjustment instruction to the proportional control valve associated with the expander, so that the proportional control valve responds to the opening adjustment instruction to execute and output the executed high-pressure air;

[0028] The high-pressure air is input 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] A second aspect of the present invention provides an expander speed regulation system for a compressed air energy storage system, comprising:

[0030] An acquisition module, used for acquiring a unit speed of an expander in a compressed air energy storage system, and inputting the unit speed into a preset unit optimization control model, wherein the unit optimization control model includes a first optimization control module and a second optimization control module;

[0031] A reference control module, used for performing reference optimization control on the rotation speed of the unit through the first optimization control module to obtain a reference pressure;

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

[0033] The regulating module is used to regulate the speed of the expander through the opening adjustment instruction.

[0034] A third aspect of the present invention provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the expander speed regulation method of the compressed air energy storage system as described in any one of the above items.

[0035] A fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed, implements the expander speed regulation method for a compressed air energy storage system as described in any one of the above items.

[0036] A fifth aspect of the present invention provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions, wherein when the program instructions are executed by a computer, the computer executes the expander speed regulation method for a compressed air energy storage system as described in any one of the above items.

[0037] It can be seen from the above technical solutions that the present invention has the following advantages:

[0038] The present invention obtains the unit speed of the expander in the compressed air energy storage system, performs benchmark optimization control on the unit speed through the first optimization control module to obtain a benchmark pressure, and then performs opening optimization control on the benchmark pressure through the second optimization control module to obtain an opening adjustment instruction, and adjusts the 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 speed of the expander, 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 decrease 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 random interference amplification of the differential link, reduce the interference of random noise on the speed regulation, and improve the reliability of the compressed air energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0040] Figure 1 A flowchart of a method for adjusting the speed of an expander of a compressed air energy storage system provided in Embodiment 1 of the present invention;

[0041] Figure 2 A flowchart of a method for adjusting the speed of an expander of a compressed air energy storage system provided in Embodiment 2 of the present invention;

[0042] Figure 3 A schematic diagram of the structure of a unit optimization control model provided in Embodiment 2 of the present invention;

[0043] Figure 4 A schematic diagram of the structure of an optimization controller provided in Embodiment 2 of the present invention;

[0044] Figure 5 A result schematic diagram of the filter differential controller provided in the second embodiment of the present invention;

[0045] Figure 6 A schematic diagram comparing the phase-frequency characteristics of the filter differential controller and the ideal differentiator provided in the second embodiment of the present invention;

[0046] Figure 7 A schematic diagram comparing the amplitude-frequency characteristics of the filter differential controller and the ideal differentiator provided in the second embodiment of the present invention;

[0047] Figure 8 A schematic diagram of a filter differentiator noise interfering with an input signal provided in the second embodiment of the present invention;

[0048] Fig. 9 A schematic diagram of a noise-interfered output signal of a filter differentiator provided in the second embodiment of the present invention;

[0049] Fig.10 A structural block diagram of an expander speed regulation system for a compressed air energy storage system provided in Embodiment 3 of the present invention;

[0050] Fig.11 A structural block diagram of an electronic device provided for embodiment 4 of the invention. DETAILED DESCRIPTION

[0051] An embodiment of the present invention provides a method and system for regulating the speed of an expander of a compressed air energy storage system, which is used to solve the technical problem that the prior art mainly uses a PID controller to regulate the speed of the expander, but in the complex environment of a compressed air energy storage power station, the PID controller will inevitably be affected by random noise, resulting in a decrease in the control performance of the PID controller on the expander, thereby reducing the reliability of the compressed air energy storage system.

[0052] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] See also Figure 1 , Figure 1 A flowchart of the steps of a method for adjusting the speed of an expander of a compressed air energy storage system provided in Embodiment 1 of the present invention.

[0054] The present invention provides a method for adjusting the speed of an expander of a compressed air energy storage system, comprising:

[0055] Step 101, obtaining the unit speed of the expander in the compressed air energy storage system, and inputting the unit speed into a preset unit optimization control model, wherein the unit optimization control model includes a first optimization control module and a second optimization control module;

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

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

[0058] Step 102: Performing reference optimization control on the unit speed through a first optimization control module to obtain a reference pressure;

[0059] In an embodiment of the present invention, the unit speed is input into a first optimization control module, wherein the first control optimization module includes a first difference operator and a first optimization controller. The unit speed and a pre-acquired reference speed are input into the first difference operator for difference operation to obtain a speed deviation value. The speed deviation value is optimized and controlled by the first optimization controller to obtain a reference pressure.

[0060] Step 103, performing opening optimization control on the reference pressure through the second optimization control module to obtain an opening adjustment instruction;

[0061] In the embodiment of the present invention, the reference pressure is input into the second optimization control module, wherein the second optimization control module includes a second difference operator and a second optimization controller. The reference pressure and the pre-acquired regulating valve pressure are input into the second difference operator for difference processing to obtain a pressure deviation value, and the pressure deviation value is input into the second optimization controller for optimization control to obtain an opening adjustment instruction.

[0062] Step 104: adjust the speed of the expander through the opening adjustment instruction.

[0063] In the embodiment of the present invention, an opening adjustment instruction is sent to a proportional control valve connected to the expander, so as to adjust the opening of the proportional control valve, thereby realizing the speed adjustment of the expander.

[0064] In the embodiment of the present invention, by obtaining the unit speed of the expander in the compressed air energy storage system, the unit speed is subjected to benchmark optimization control through the first optimization control module to obtain the benchmark pressure, and then the opening optimization control is performed on the benchmark pressure through the second optimization control module to obtain the opening adjustment instruction, and the speed of the expander is adjusted according to the opening adjustment instruction, thereby overcoming the technical problem that the prior art mainly uses a PID controller to adjust the speed of the expander, 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 decrease 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 random interference amplification of the differential link, reduce the interference of random noise on the speed regulation, and improve the reliability of the compressed air energy storage system.

[0065] See also Figure 2 , Figure 2 A flowchart of the steps of a method for adjusting the speed of an expander of a compressed air energy storage system provided in Embodiment 2 of the present invention.

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

[0067] Step 201, obtaining the unit speed of the expander in the compressed air energy storage system, and inputting the unit speed into a 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 embodiment of the present invention, refer to 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 a preset unit optimization control model (i.e., the expander speed controller), wherein the unit optimization control model includes a first optimization control module and a second optimization control module.

[0069] Step 202: Performing reference optimization control on the unit speed through a first optimization control module to obtain a reference pressure;

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

[0071] S11, inputting the unit speed and the pre-acquired reference speed into a first difference operator to perform difference calculation to obtain a speed deviation value;

[0072] In the embodiment of the present invention, the unit speed (ie, ω) and the pre-acquired reference speed (ie, ω) are * ) is input into the first difference operator for difference operation to obtain the speed deviation value (i.e. Δω).

[0073] S12. Optimizing the rotation speed deviation value through a first optimization controller to obtain a reference pressure, wherein the optimization controller includes a first proportional controller, an integral controller, a filter differential controller, a second proportional controller and an adder.

[0074] Further, see Figure 4 As shown, S12 includes the following sub-steps:

[0075] S121, performing proportional control on the speed deviation value by a first proportional controller to obtain a first proportional value;

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

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

[0078] In the embodiment of the present invention, 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 The value range of the first proportional control parameter K is 0~2; P1 The value of is selected according to the control system debugging situation.

[0080] S123, performing an integration operation on the first proportional value through an integral controller to obtain a first integral value;

[0081] In the embodiment of the present invention, the first proportional value is input into the integral controller to perform an integral operation to obtain a first integral value.

[0082] S124, performing a filter differential operation on the first proportional value through a filter differential controller to obtain a first filter differential value, wherein the filter differential controller includes a combined differentiator, a phase compensation filter and a noise filter;

[0083] Further, see Figure 5 As shown, S124 includes the following sub-steps:

[0084] S1241, performing a combined differential operation on the first proportional value through a combined differentiator to obtain a first filtered value;

[0085] In the embodiment of the present invention, the first proportional value is input into the combined differentiator to perform a combined differential operation to obtain the first filtered value.

[0086] It should be noted that the transfer function of the combined differentiator configuration is specifically:

[0087]

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

[0089] S1242, performing phase optimization control on the first filter value through a phase compensation filter to obtain a second filter value;

[0090] In the embodiment of the present invention, the first filter value is input into a phase compensation filter to perform phase optimization control to obtain a second filter value.

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

[0092]

[0093] S1243. Perform noise filtering on the second filtered value through a noise filter to obtain a first filtered differential value.

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

[0095] It should be noted that the transfer function of the noise filter configuration is specifically:

[0096]

[0097] It is worth mentioning that the phase-frequency and amplitude-frequency characteristics of the filter differential controller 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 derivative controller and the ideal differentiator FD =T ID =100s. Figure 6 and Figure 7 As shown in the figure, the filter differential controller is similar to the ideal differentiator when the frequency ω is less than 0.01rad / s, the phase of the filter differential controller is +90°, and the maximum phase error is +1° / -0.3°. The high-frequency gain of the ideal differentiator tends to infinity, and the peak gain of the filter differential controller is 11.95dB.

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

[0101]

[0102] Where, 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. npg =2000s, the digital calculation interval is 0.5s, and a pseudo-random signal with zero mean and a peak-to-peak value range of ±0.01 is input at the input end of the filter differential controller, that is, the noise interference input signal n int (t), if attached Figure 8 As shown. The noise interference output signal n is obtained at the output end of the filter differential controller out (t), if attached Fig. 9 As shown. After calculation, the noise power gain NPG of the filter differential controller of the present invention is obtained to be 0.27. It can be seen that the filter differential controller has the ability to resist random interference amplification.

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

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

[0105] Step 203, performing opening optimization control on the reference pressure through the second optimization control module to obtain an opening adjustment instruction;

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

[0107] S21, inputting the reference pressure and the pre-acquired regulating valve pressure into a second difference operator to perform difference operation to obtain a pressure deviation value;

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

[0109] In the embodiment of the present invention, the second difference operator performs difference processing on the reference pressure and the pre-acquired regulating valve pressure to obtain a pressure deviation value.

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

[0111] In the embodiment of the present invention, the pressure deviation value is used as the input of the second optimization controller to perform optimization control to obtain an opening adjustment instruction.

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

[0113] It is worth mentioning that although the structures of the first optimization controller and the second optimization controller are the same, they play different roles in the control system of the present invention. 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: Send the opening adjustment instruction to the proportional control valve associated with the expander, so that the proportional control valve responds to the opening adjustment instruction and executes, and outputs the executed high-pressure air;

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

[0116] In an embodiment of the present invention, an opening adjustment instruction is sent to the proportional control valve of the compressed air energy storage system, and the opening of the proportional control valve at the front end of the expander is adjusted by the opening adjustment instruction, thereby adjusting the high-pressure air pressure and flow rate at the expander inlet.

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

[0118] In an embodiment of the present invention, the regulated high-pressure air is heated by a heat exchanger connected to the expander to form high-temperature and high-pressure air 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, the high-pressure air is heated by a heat exchanger associated with the expander to form high-temperature and high-pressure air 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 present invention, by obtaining the unit speed of the expander in the compressed air energy storage system, the unit speed is subjected to benchmark optimization control through the first optimization control module to obtain the benchmark pressure, and then the opening optimization control is performed on the benchmark pressure through the second optimization control module to obtain the opening adjustment instruction, and the speed of the expander is adjusted according to the opening adjustment instruction, thereby overcoming the technical problem that the prior art mainly uses a PID controller to adjust the speed of the expander, 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 decrease 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 random interference amplification of the differential link, reduce the interference of random noise on the speed regulation, and improve the reliability of the compressed air energy storage system.

[0121] See also Fig.10 , Fig.10 This is a structural block diagram of an expander speed regulation system for a compressed air energy storage system provided in Example 3 of the present invention.

[0122] The present invention provides an expander speed regulating system for a compressed air energy storage system, comprising:

[0123] The acquisition module 301 is used to obtain the unit speed of the expander in the compressed air energy storage system, and input the unit speed into a preset unit optimization control model, wherein the unit optimization control model includes a first optimization control module and a second optimization control module;

[0124] A reference control module 302 is used to perform reference optimization control on the unit speed through a first optimization control module to obtain a reference pressure;

[0125] The opening control module 303 is used to perform opening optimization control on the reference pressure through the second optimization control module to obtain an opening adjustment instruction;

[0126] The regulating module 304 is used to regulate the speed of the expander through an opening adjustment instruction.

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

[0128] A first difference submodule, used for inputting the unit speed and the pre-acquired reference speed into a first difference operator for difference calculation to obtain a speed deviation value;

[0129] The first optimization submodule is used to optimize the rotation speed deviation value through a first optimization controller to obtain a reference pressure, wherein the optimization controller includes a first proportional controller, an integral controller, a filter differential controller, a second proportional controller and an adder.

[0130] Furthermore, the first optimization submodule includes:

[0131] A first proportional control unit, used for performing proportional control on the rotation speed deviation value through a first proportional controller to obtain a first proportional value;

[0132] A second proportional control unit, used for proportionally controlling the first proportional value through a second proportional controller to obtain a second proportional value;

[0133] An integral control unit, used for performing an integral operation on the first proportional value through an integral controller to obtain a first integral value;

[0134] A filter differential control unit, used for performing a filter differential operation on the first proportional value through a filter differential controller to obtain a first filter differential value, wherein the filter differential controller includes a combined differentiator, a phase compensation filter and a noise filter;

[0135] The adding unit is used to input the second proportional value, the first integral value and the first filtered differential value into the adding unit for adding operation to obtain a reference pressure.

[0136] Furthermore, the filter differential control unit comprises:

[0137] A combined differential unit, used for performing a combined differential operation on the first proportional value through a combined differentiator to obtain a first filtered value;

[0138] A phase optimization subunit, configured to perform phase optimization control on the first filter value through a phase compensation filter to obtain a second filter value;

[0139] The filtering subunit is used to perform noise filtering processing on the second filtered value through a noise filter to obtain a first filtered differential value.

[0140] Furthermore, the second optimization control module includes a second difference operator and a second optimization controller, and the opening control module 303 includes:

[0141] A second difference submodule, used for inputting the reference pressure and the pre-acquired regulating valve pressure into a second difference operator for difference calculation to obtain a pressure deviation value;

[0142] The second optimization control submodule is used to input the pressure deviation value into the second optimization controller for optimization control to obtain an opening adjustment instruction.

[0143] Furthermore, the adjustment module 304 includes:

[0144] The opening adjustment submodule is used to send the opening adjustment instruction to the proportional control valve associated with the expander, so that the proportional control valve responds to the opening adjustment instruction to execute and output the high-pressure air after execution;

[0145] The speed regulating submodule is used to input the high-pressure air into the expander after passing through the heat exchanger associated with the expander, so as to adjust the speed of the expander to the rated speed.

[0146] See also Fig.11 , Fig.11 This is a structural block diagram of an electronic device provided in Embodiment 4 of the present invention.

[0147] An electronic device according to an embodiment of the present invention includes: a memory 401 and a processor 402, wherein the memory 402 stores a computer program; when the computer program is executed by the processor 402, the processor 402 executes the expander speed regulation method of the compressed air energy storage system as in any of the above embodiments.

[0148] The memory 401 may 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 a program code 413 for executing any method step in the above method. For example, the storage space 403 for the program code may include individual program codes 413 for implementing the various steps in the above method, respectively. These program codes may be read from or written to one or more computer program products. These computer program products include program code carriers such as a hard disk, a compact disk (CD), a memory card or a floppy disk. The program code may be compressed, for example, in an appropriate form. When these codes are run by a computing and processing device, the computing and processing device is caused to execute the various steps in the above-described method.

[0149] Embodiment 5 of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the expander speed regulation method of the compressed air energy storage system as in any of the above embodiments is implemented.

[0150] Embodiment 6 of the present invention further provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions, wherein when the program instructions are executed by a computer, the computer executes the expander speed regulation method of the compressed air energy storage system of any of the above embodiments.

[0151] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0152] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

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

[0154] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0155] If the integrated unit is implemented in the form of 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. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0156] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for adjusting the speed of an expander of a compressed air energy storage system, characterized in that: include: Acquire the unit speed of the expander in the compressed air energy storage system, and input the unit speed into a preset unit optimization control model, wherein the unit optimization control model includes a first optimization control module and a second optimization control module; Performing reference optimization control on the speed of the unit through the first optimization control module to obtain a reference pressure; The second optimization control module performs opening optimization control on the reference pressure to obtain an opening adjustment instruction; The speed of the expander is adjusted by the opening adjustment instruction.

2. The method for adjusting the expander speed of a compressed air energy storage system according to claim 1, characterized in that: The first optimization control module includes a first difference operator and a first optimization controller. The step of performing benchmark optimization control on the unit speed through the first optimization control module to obtain a benchmark pressure includes: Inputting the unit speed and the pre-acquired reference speed into the first difference operator to perform difference calculation to obtain a speed deviation value; The rotation speed deviation value is optimized and controlled by the first optimization controller to obtain a reference pressure, wherein the optimization controller includes a first proportional controller, an integral controller, a filter differential controller, a second proportional controller and an adder.

3. The method for adjusting the expander speed of a compressed air energy storage system according to claim 2, characterized in that: The step of optimizing and controlling the rotation speed deviation value by the first optimization controller to obtain a reference pressure comprises: Proportional control is performed on the rotation speed deviation value by the first proportional controller to obtain a first proportional value; Proportionally controlling the first proportional value by the second proportional controller to obtain a second proportional value; Performing an integration operation on the first proportional value by the integral controller to obtain a first integral value; Performing a filter differential operation on the first proportional value through the filter differential controller to obtain a first filter differential value, wherein the filter differential controller includes a combined differentiator, a phase compensation filter and a noise filter; The second proportional value, the first integral value and the first filtered differential value are input into the adder for addition to obtain a reference pressure.

4. The method for adjusting the expander speed of a compressed air energy storage system according to claim 3, characterized in that: The step of performing a filter differential operation on the first proportional value by the filter differential controller to obtain a first filter differential value comprises: Performing a combined differential operation on the first proportional value by the combined differentiator to obtain a first filtered value; Performing phase optimization control on the first filter value by the phase compensation filter to obtain a second filter value; The second filtered value is subjected to noise filtering processing by the noise filter to obtain a first filtered differential value.

5. The method for adjusting the expander speed of a compressed air energy storage system according to claim 1, characterized in that: The second optimization control module includes a second difference operator and a second optimization controller. The step of performing opening optimization control on the reference pressure through the second optimization control module to obtain an opening adjustment instruction includes: Inputting the reference pressure and the pre-acquired regulating valve pressure into the second difference operator to perform difference operation to obtain a pressure deviation value; The pressure deviation value is input into the second optimization controller for optimization control to obtain an opening adjustment instruction.

6. The method for adjusting the expander speed of a compressed air energy storage system according to claim 1, characterized in that: The step of adjusting the speed of the expander by using the opening adjustment instruction comprises: Sending the opening adjustment instruction to the proportional control valve associated with the expander, so that the proportional control valve responds to the opening adjustment instruction to execute and output the executed high-pressure air; The high-pressure air is input 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.

7. An expander speed regulation system for a compressed air energy storage system, characterized in that: include: An acquisition module, used for acquiring a unit speed of an expander in a compressed air energy storage system, and inputting the unit speed into a preset unit optimization control model, wherein the unit optimization control model includes a first optimization control module and a second optimization control module; A reference control module, used for performing reference optimization control on the rotation speed of the unit through the first optimization control module to obtain a reference pressure; an opening control module, configured to perform opening optimization control on the reference pressure through the second optimization control module to obtain an opening adjustment instruction; The regulating module is used to regulate the speed of the expander through the opening adjustment instruction.

8. An electronic device, characterized in that: It includes a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the processor executes the steps of the expander speed regulation method of the compressed air energy storage system as described in any one of claims 1-6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed, the expander speed regulation method of the compressed air energy storage system as described in any one of claims 1-6 is implemented.

10. A computer program product, characterized in that The computer program product includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions, wherein when the program instructions are executed by a computer, the computer executes the expander speed regulation method for a compressed air energy storage system as described in any one of claims 1-6.

Images