Compressed air energy storage shafting oscillation suppression method and device based on sleeved impeller

Abstract

The invention relates to the technical field of novel energy, in particular to a compressed air energy storage shafting oscillation suppression method and device based on a sleeved impeller, and the method comprises the steps: calculating a shaft section rigidity coefficient of a turbine and synchronous generator connection system based on a pre-established shafting model of the turbine and synchronous generator connection system; adjusting the shaft section rigidity coefficient by using the target set impeller meeting the preset condition to obtain an adjusted shaft section rigidity coefficient; and the shafting oscillation frequency of the compressed air energy storage system is inhibited according to the adjusted shaft section rigidity coefficient. Therefore, the problems that in the related technology, when the frequency of external disturbance is close to the natural oscillation frequency of the system shafting, the system shafting has a serious oscillation phenomenon, serious fatigue life loss is caused to the shafting of the shafting device, and the operation safety and stability of the compressed air energy storage system are reduced are solved.

Description

Technical Field

[0001] The present invention relates to the field of new energy technology, and in particular to a method and device for suppressing shaft oscillation of compressed air energy storage based on a set impeller. Background Art

[0002] Due to the volatility and randomness of the output of new energy sources such as wind power and photovoltaics, large-scale energy storage technology is needed to support the high proportion of new energy grid connection, and then promote the construction of a new power system with new energy as the main body, which is conducive to promoting the realization of my country's dual carbon goals. Therefore, non-supplementary compressed air energy storage technology has developed rapidly. The power generation side of the non-supplementary compressed air energy storage system adopts a coaxial connection structure between the turbine and the synchronous generator. As a large-scale clean physical energy storage technology, non-supplementary compressed air energy storage technology eliminates the process of fossil fuel combustion, realizes no combustion and zero carbon emissions in the entire process, and improves the cycle efficiency of the entire system.

[0003] In the related technology, the turbine side structure with multi-stage expansion and inter-stage heating has become the main structural form of large-scale compressed air energy storage system. However, when external disturbances enter the compressed air energy storage system, especially when the frequency of the external disturbances is close to the natural oscillation frequency of the system shaft system, the system shaft system will experience serious oscillation, causing serious fatigue life loss to the shaft system device shaft system, causing serious damage to the system shaft system, reducing the safety and stability of the compressed air energy storage system operation, and failing to ensure the safe grid connection of large-scale compressed air energy storage systems, which urgently needs to be improved. Summary of the invention

[0004] The present invention provides a method and device for suppressing oscillation of a compressed air energy storage shaft system based on a set impeller, so as to solve the problem in the related art that when the frequency of the external disturbance is close to the natural oscillation frequency of the system shaft system, the system shaft system will experience serious oscillation phenomenon, causing serious fatigue life loss to the shaft system device shaft system, and reducing the safety and stability of the operation of the compressed air energy storage system.

[0005] The first aspect of the present invention provides a method for suppressing shaft oscillation of a compressed air energy storage system based on a set impeller, comprising the following steps: based on a pre-established shaft model of a turbine and a synchronous generator connection system, calculating the shaft section stiffness coefficient of the turbine and the synchronous generator connection system; adjusting the shaft section stiffness coefficient using a target set impeller that meets preset conditions to obtain an adjusted shaft section stiffness coefficient; and suppressing the shaft system oscillation frequency of the compressed air energy storage system according to the adjusted shaft section stiffness coefficient.

[0006] Optionally, in one embodiment of the present invention, the shaft section stiffness coefficient of the turbine and synchronous generator connection system is calculated based on a pre-established shaft system model of the turbine and synchronous generator connection system, including: determining a formula for a target correspondence between the input torque disturbance of the turbine and the angular amplitude of the mass block of the turbine based on the shaft system model; and determining the shaft section stiffness coefficient of the turbine and synchronous generator connection system according to the formula for the target correspondence.

[0007] Optionally, in one embodiment of the present invention, the formula of the target correspondence relationship is:

[0008]

[0009] Where M is the inertia time constant matrix, K is the stiffness coefficient matrix, θ is the rotation angle column vector of each rigid mass block, T is the input torque column vector of each rigid mass block, ω d is the frequency of the external disturbance.

[0010] Optionally, in one embodiment of the present invention, the step of adjusting the shaft segment stiffness coefficient by using the target set impeller that meets preset conditions to obtain the adjusted shaft segment stiffness coefficient includes: obtaining the shaft segment equivalent stiffness diameter corresponding to the shaft segment stiffness coefficient; adjusting the shaft segment equivalent stiffness diameter by using the target set impeller that meets preset conditions to obtain the adjusted shaft segment equivalent stiffness diameter, so as to determine the adjusted shaft segment stiffness coefficient according to the adjusted shaft segment equivalent stiffness diameter.

[0011] Optionally, in one embodiment of the present invention, before calculating the shaft segment stiffness coefficient of the turbine and synchronous generator connection system based on a pre-established shaft system model of the turbine and synchronous generator connection system, it also includes: modeling based on the turbine and the synchronous generator to obtain a rigid mass block; modeling based on the transmission shaft connecting the turbine and the synchronous generator to obtain an elastic shaft segment; and using the rigid mass block and the elastic shaft segment to obtain the shaft system model of the turbine and the synchronous generator connection system.

[0012] The second aspect of the present invention provides a compressed air energy storage shaft oscillation suppression device based on a set impeller, including: a calculation module, which is used to calculate the shaft section stiffness coefficient of the turbine and synchronous generator connection system based on a pre-established shaft system model of the turbine and synchronous generator connection system; a first determination module, which is used to adjust the shaft section stiffness coefficient using a target set impeller that meets preset conditions to obtain an adjusted shaft section stiffness coefficient; a suppression module, which is used to suppress the shaft system oscillation frequency of the compressed air energy storage system according to the adjusted shaft section stiffness coefficient.

[0013] Optionally, in one embodiment of the present invention, the calculation module includes: a first determination unit, used to determine the formula of the target correspondence between the input torque disturbance of the turbine and the mass block angle amplitude of the turbine based on the shaft system model; and a second determination unit, used to determine the shaft section stiffness coefficient of the connection system between the turbine and the synchronous generator according to the formula of the target correspondence.

[0014] Optionally, in one embodiment of the present invention, the formula of the target correspondence relationship is:

[0015]

[0016] Where M is the inertia time constant matrix, K is the stiffness coefficient matrix, θ is the rotation angle column vector of each rigid mass block, T is the input torque column vector of each rigid mass block, ω d is the frequency of the external disturbance.

[0017] Optionally, in one embodiment of the present invention, the first determination module includes: an acquisition unit, used to obtain the shaft segment equivalent stiffness diameter corresponding to the shaft segment stiffness coefficient; a determination unit, used to adjust the shaft segment equivalent stiffness diameter using the target set impeller that meets the preset conditions to obtain the adjusted shaft segment equivalent stiffness diameter, so as to determine the adjusted shaft segment stiffness coefficient based on the adjusted shaft segment equivalent stiffness diameter.

[0018] Optionally, in one embodiment of the present invention, the device of the embodiment of the present invention also includes: a second determination module, which is used to model the turbine and the synchronous generator to obtain a rigid mass block before calculating the shaft segment stiffness coefficient of the turbine and the synchronous generator connection system based on a pre-established shaft system model of the turbine and the synchronous generator connection system; a third determination module, which is used to model the transmission shaft connecting the turbine and the synchronous generator to obtain an elastic shaft segment before calculating the shaft segment stiffness coefficient of the turbine and the synchronous generator connection system based on a pre-established shaft system model of the turbine and the synchronous generator connection system; and a fourth determination module, which is used to obtain the shaft system model of the turbine and the synchronous generator connection system using the rigid mass block and the elastic shaft segment before calculating the shaft segment stiffness coefficient of the turbine and the synchronous generator connection system based on a pre-established shaft system model of the turbine and the synchronous generator connection system.

[0019] A third aspect of the present invention provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method for suppressing shaft oscillations of compressed air energy storage based on a set impeller as described in the above embodiment.

[0020] A fourth aspect of the present invention provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the above-mentioned method for suppressing shaft oscillations of compressed air energy storage based on a set impeller.

[0021] A fifth aspect of the present invention provides a computer program product, including a computer program, which, when executed, is used to implement the above-mentioned method for suppressing shaft oscillations of compressed air energy storage based on a set impeller.

[0022] The embodiment of the present invention can calculate the shaft stiffness coefficient of the turbine and synchronous generator connection system based on the pre-established shaft system model of the turbine and synchronous generator connection system, adjust the shaft stiffness coefficient by using the target set impeller that meets certain conditions, and suppress the shaft oscillation frequency of the compressed air energy storage system according to the adjusted shaft stiffness coefficient, thereby effectively improving the safety and stability of the operation of the compressed air energy storage system. In this way, the problem in the related art that when the frequency of the external disturbance is close to the natural oscillation frequency of the system shaft system, the system shaft system will experience severe oscillation, causing serious fatigue life loss to the shaft system device shaft system, and reducing the safety and stability of the operation of the compressed air energy storage system is solved.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0025] Figure 1 A flowchart of a method for suppressing shaft oscillation of compressed air energy storage based on a set impeller according to an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of the structure of a turbine and synchronous generator coupling system according to a specific embodiment of the present invention;

[0027] Figure 3 A schematic diagram of the structure of a set impeller according to a specific embodiment of the present invention;

[0028] Figure 4 A schematic diagram of the structure of a compressed air energy storage shaft oscillation suppression device based on a set impeller according to an embodiment of the present invention;

[0029] Figure 5 It is a schematic diagram of the structure of an electronic device provided according to an embodiment of the present invention.

[0030] Among them, 10-a compressed air energy storage shaft oscillation suppression device based on a set impeller; 100-a calculation module, 200-a first determination module and 300-a suppression module; 501-a memory, 502-a processor and 503-a communication interface. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0032] The following describes the compressed air energy storage shaft system oscillation suppression method and device based on the set impeller according to the embodiment of the present invention with reference to the accompanying drawings. In view of the related art mentioned in the above background technology, when the frequency of the external disturbance is close to the natural oscillation frequency of the system shaft system, the system shaft system has serious oscillation phenomenon, which causes serious fatigue life loss to the shaft system of the shaft system device, and reduces the safety and stability of the operation of the compressed air energy storage system. The present invention provides a compressed air energy storage shaft system oscillation suppression method based on the set impeller, in which the shaft section stiffness coefficient of the turbine and synchronous generator connection system can be calculated based on the pre-established shaft system model of the turbine and synchronous generator connection system, and the shaft section stiffness coefficient is adjusted by using the target set impeller that meets certain conditions, and the shaft section stiffness coefficient of the compressed air energy storage system is suppressed according to the adjusted shaft section stiffness coefficient, which effectively improves the safety and stability of the operation of the compressed air energy storage system. Thus, the related art solves the problem that when the frequency of the external disturbance is close to the natural oscillation frequency of the system shaft system, the system shaft system has serious oscillation phenomenon, which causes serious fatigue life loss to the shaft system of the shaft system device, and reduces the safety and stability of the operation of the compressed air energy storage system.

[0033] Specifically, Figure 1 A schematic flow chart of a method for suppressing shaft oscillation of a compressed air energy storage system based on a set impeller provided in an embodiment of the present invention.

[0034] like Figure 1 As shown, the compressed air energy storage shaft oscillation suppression method based on the set impeller includes the following steps:

[0035] In step S101, based on a pre-established shaft system model of the turbine and synchronous generator connection system, a shaft segment stiffness coefficient of the turbine and synchronous generator connection system is calculated.

[0036] It can be understood that the embodiment of the present invention can calculate the shaft section stiffness coefficient of the turbine and synchronous generator connection system based on the shaft system model of the turbine and synchronous generator connection system pre-established in the following steps, so as to suppress the shaft system oscillation by changing the shaft section stiffness coefficient, thereby effectively improving the feasibility of compressed air energy storage shaft system oscillation suppression.

[0037] Optionally, in one embodiment of the present invention, before calculating the shaft segment stiffness coefficient of the turbine and synchronous generator connection system based on the pre-established shaft system model of the turbine and synchronous generator connection system, it also includes: modeling based on the turbine and the synchronous generator to obtain a rigid mass block; modeling based on the transmission shaft connecting the turbine and the synchronous generator to obtain an elastic shaft segment; and using the rigid mass block and the elastic shaft segment to obtain the shaft system model of the turbine and the synchronous generator connection system.

[0038] In the actual implementation process, Figure 2 As shown, the embodiment of the present invention can establish a shaft system model of the turbine and synchronous generator connection system according to the turbine and synchronous generator coupling system, model the turbine and the synchronous generator as rigid mass blocks, model the transmission shafts of the turbine and the synchronous generator as elastic shaft segments, and use the rigid mass blocks and elastic shaft segments to obtain the shaft system model of the turbine and synchronous generator connection system, which effectively improves the feasibility of suppressing the shaft system oscillation of the compressed air energy storage system.

[0039] Among them, the embodiment of the present invention can ignore the influence of the internal damping of the compressed air energy storage system, and the shaft system oscillation characteristics of the system can be reflected by the shaft system motion equation of the compressed air energy storage system, wherein the shaft system motion equation of the compressed air energy storage system is expressed in matrix form as follows:

[0040]

[0041] Among them, M is the inertia time constant matrix, K is the stiffness coefficient matrix, θ is the rotation angle column vector of each rigid mass block, and T is the input torque column vector of each rigid mass block.

[0042] Among them, the inertia time constant matrix M is expressed as:

[0043]

[0044] Among them, the subscript 1 represents a turbine, and the subscript 2 represents a synchronous generator.

[0045] The stiffness coefficient matrix K is expressed as:

[0046]

[0047] The rotation angle column vector θ of each rigid mass block is expressed as:

[0048]

[0049] Among them, the subscript 1 represents a turbine, and the subscript 2 represents a synchronous generator.

[0050] The input torque column vector T of each rigid mass block is expressed as:

[0051]

[0052] Among them, the subscript 1 represents a turbine, and the subscript 2 represents a synchronous generator.

[0053] In addition, the calculation formula for the rotation angle amplitude of each rigid mass block of the compressed air energy storage system in the embodiment of the present invention is:

[0054] Δθ=(K-ω d 2 M) -1 ΔT

[0055] Among them, ω d is the frequency of the external disturbance, Δθ is the angular amplitude of each rigid mass block, and ΔT is the torque disturbance amplitude of each rigid mass block.

[0056] Among them, in one embodiment of the present invention, based on a pre-established shaft system model of the turbine and synchronous generator connection system, the shaft section stiffness coefficient of the turbine and synchronous generator connection system is calculated, including: based on the shaft system model, determining the formula for the target correspondence between the input torque disturbance of the turbine and the angular amplitude of the mass block of the turbine; determining the shaft section stiffness coefficient of the turbine and synchronous generator connection system according to the formula of the target correspondence.

[0057] As a possible implementation method, according to the established shaft system model, the embodiment of the present invention can be analyzed to know that the matrix (K-ω d 2 M) -1 It reflects the influence of the external torque disturbance on the angular amplitude of the mass block. By changing the stiffness coefficient of the connecting shaft, the influence of the torque disturbance on the angular amplitude of the mass block can be reduced, thereby suppressing the shaft oscillation of the compressed air energy storage system. Among them, the target correspondence between the turbine input torque disturbance and the turbine angular amplitude, that is, the influence degree, can be expressed as:

[0058]

[0059] Where M is the inertia time constant matrix, K is the stiffness coefficient matrix, θ is the rotation angle column vector of each rigid mass block, T is the input torque column vector of each rigid mass block, ω d is the frequency of the external disturbance.

[0060] Next, let the matrix That is F11 =0, the influence of the turbine input torque disturbance on the turbine rotation angle amplitude is minimized, for example, the influence of the external disturbance on the turbine rotation angle amplitude is close to 0. Therefore, it can be seen that under a certain external disturbance, when the stiffness coefficient of the shaft connecting the turbine and the synchronous generator meets a specific value, the shaft system oscillation will be greatly suppressed, and the value of the stiffness coefficient meets:

[0061]

[0062] Therefore, the embodiments of the present invention can significantly suppress the shaft system oscillation of the compressed air energy storage system by adjusting the stiffness coefficient of the shaft segment to meet the above value.

[0063] In step S102, the shaft segment stiffness coefficient is adjusted using the target impeller assembly that meets the preset conditions to obtain an adjusted shaft segment stiffness coefficient.

[0064] It can be understood that the embodiment of the present invention can use the target set impeller that meets certain conditions to adjust the shaft segment stiffness coefficient to obtain the adjusted shaft segment stiffness coefficient, wherein the target set impeller with preset conditions is the relevant geometric parameters of the set impeller calculated according to the calculation formula of the shaft segment stiffness coefficient after the set impeller and the shaft segment stiffness coefficient that should be used to suppress shaft system oscillation, and the set impeller is designed according to the geometric parameters, thereby improving the safety and stability of the operation of the compressed air energy storage system and ensuring the safe grid connection of large-scale compressed air energy storage systems.

[0065] Among them, in one embodiment of the present invention, the shaft segment stiffness coefficient is adjusted using a target set impeller that meets preset conditions to obtain an adjusted shaft segment stiffness coefficient, including: obtaining the shaft segment equivalent stiffness diameter corresponding to the shaft segment stiffness coefficient; adjusting the shaft segment equivalent stiffness diameter using a target set impeller that meets preset conditions to obtain an adjusted shaft segment equivalent stiffness diameter, so as to determine the adjusted shaft segment stiffness coefficient based on the adjusted shaft segment equivalent stiffness diameter.

[0066] In some embodiments, the embodiments of the present invention can obtain the shaft segment equivalent stiffness diameter corresponding to the shaft segment stiffness coefficient, wherein the calculation formula of the shaft segment stiffness coefficient satisfies:

[0067]

[0068] Among them, G is the shear elastic modulus of the shaft segment, L is the length of the shaft segment, and D oe is the equivalent stiffness diameter of the shaft segment, D i The inner diameter of the shaft segment.

[0069] like Figure 3 As shown in the figure, when the rotor is covered with an impeller, the impeller will increase the stiffness coefficient of the shaft section, and the calculation formula for the equivalent stiffness diameter is:

[0070] D oe=D1+L2tan12.

[0071] Among them, D1 and L2 are the geometric parameters of the impeller.

[0072] Therefore, by installing the impeller, the equivalent stiffness diameter of the shaft section can be changed, and then the stiffness coefficient of the shaft section can be changed, so that the stiffness coefficient of the shaft section is close to The influence of external disturbances on the angular vibration of the turbine can be greatly reduced, thereby suppressing the oscillation of the shaft system.

[0073] In step S103, the shaft system oscillation frequency of the compressed air energy storage system is suppressed according to the adjusted shaft segment stiffness coefficient.

[0074] It can be understood that the embodiments of the present invention can suppress the shaft oscillation frequency of the compressed air energy storage system according to the adjusted shaft segment stiffness coefficient. For example, a set impeller designed according to geometric parameters can be installed in the original compressed air energy storage system, thereby achieving the suppression of the shaft oscillation frequency of the compressed air energy storage system and improving the safety and stability of the operation of the compressed air energy storage system.

[0075] According to the method for suppressing the shaft oscillation of compressed air energy storage based on the set impeller proposed in the embodiment of the present invention, the shaft section stiffness coefficient of the turbine and synchronous generator connection system can be calculated based on the pre-established shaft system model of the turbine and synchronous generator connection system, and the shaft section stiffness coefficient can be adjusted by using the target set impeller that meets certain conditions. The shaft oscillation frequency of the compressed air energy storage system is suppressed according to the adjusted shaft section stiffness coefficient, and the safety and stability of the operation of the compressed air energy storage system are effectively improved. In this way, the problem in the related art that when the frequency of the external disturbance is close to the natural oscillation frequency of the system shaft system, the system shaft system has serious oscillation phenomenon, causing serious fatigue life loss to the shaft system device shaft system, and reducing the safety and stability of the operation of the compressed air energy storage system is solved.

[0076] Next, a compressed air energy storage shaft oscillation suppression device based on a set impeller according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0077] Figure 4 It is a block diagram of a compressed air energy storage shaft oscillation suppression device based on a set impeller according to an embodiment of the present invention.

[0078] like Figure 5 As shown, the compressed air energy storage shaft oscillation suppression device 10 based on the set impeller includes: a calculation module 100, a first determination module 200 and a suppression module 300.

[0079] Specifically, the calculation module 100 is used to calculate the shaft segment stiffness coefficient of the turbine and synchronous generator connection system based on a pre-established shaft system model of the turbine and synchronous generator connection system.

[0080] The first determination module 200 is used to adjust the shaft segment stiffness coefficient by using the target impeller assembly that meets the preset conditions to obtain the adjusted shaft segment stiffness coefficient.

[0081] The suppression module 300 is used to suppress the shaft system oscillation frequency of the compressed air energy storage system according to the adjusted shaft segment stiffness coefficient.

[0082] Optionally, in one embodiment of the present invention, the calculation module 100 includes: a first determination unit and a second determination unit.

[0083] The first determination unit is used to determine a formula for a target corresponding relationship between an input torque disturbance of the turbine and a rotation angle amplitude of a mass block of the turbine based on a shaft system model;

[0084] The second determination unit is used to determine the shaft segment stiffness coefficient of the turbine and synchronous generator connection system according to the formula of the target corresponding relationship.

[0085] Optionally, in one embodiment of the present invention, the formula of the target correspondence relationship is:

[0086]

[0087] Where M is the inertia time constant matrix, K is the stiffness coefficient matrix, θ is the rotation angle column vector of each rigid mass block, T is the input torque column vector of each rigid mass block, ω d is the frequency of the external disturbance.

[0088] Optionally, in one embodiment of the present invention, the first determining module 200 includes: an acquiring unit and a determining unit.

[0089] The acquisition unit is used to acquire the shaft segment equivalent stiffness diameter corresponding to the shaft segment stiffness coefficient;

[0090] The determination unit is used to adjust the equivalent stiffness diameter of the shaft segment using the target set impeller that meets the preset conditions to obtain the adjusted equivalent stiffness diameter of the shaft segment, so as to determine the adjusted stiffness coefficient of the shaft segment according to the adjusted equivalent stiffness diameter of the shaft segment.

[0091] Optionally, in one embodiment of the present invention, the apparatus 10 of the embodiment of the present invention further includes: a second determination module, a third determination module and a fourth determination module.

[0092] Among them, the second determination module is used to model the turbine and the synchronous generator to obtain a rigid mass block before calculating the shaft segment stiffness coefficient of the turbine and synchronous generator connection system based on the pre-established shaft system model of the turbine and synchronous generator connection system.

[0093] The third determination module is used to model the transmission shaft connecting the turbine and the synchronous generator to obtain an elastic shaft segment before calculating the shaft segment stiffness coefficient of the turbine and synchronous generator connection system based on the pre-established shaft system model of the turbine and synchronous generator connection system.

[0094] The fourth determination module is used to obtain the shaft system model of the turbine and synchronous generator connection system using a rigid mass block and an elastic shaft segment before calculating the shaft segment stiffness coefficient of the turbine and synchronous generator connection system based on a pre-established shaft system model of the turbine and synchronous generator connection system.

[0095] It should be noted that the above explanation of the embodiment of the method for suppressing shaft oscillation of compressed air energy storage based on a set impeller is also applicable to the device for suppressing shaft oscillation of compressed air energy storage based on a set impeller of this embodiment, and will not be repeated here.

[0096] According to the compressed air energy storage shaft oscillation suppression device based on the set impeller proposed in the embodiment of the present invention, the shaft section stiffness coefficient of the turbine and synchronous generator connection system can be calculated based on the pre-established shaft system model of the turbine and synchronous generator connection system, and the shaft section stiffness coefficient can be adjusted using the target set impeller that meets certain conditions. The shaft oscillation frequency of the compressed air energy storage system is suppressed according to the adjusted shaft section stiffness coefficient, and the safety and stability of the operation of the compressed air energy storage system are effectively improved. In this way, the problem in the related art that when the frequency of the external disturbance is close to the natural oscillation frequency of the system shaft system, the system shaft system has serious oscillation phenomenon, causing serious fatigue life loss to the shaft system of the shaft system device, and reducing the safety and stability of the operation of the compressed air energy storage system is solved.

[0097] Figure 5 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. The electronic device may include:

[0098] A memory 501 , a processor 502 , and a computer program stored in the memory 501 and executable on the processor 502 .

[0099] When the processor 502 executes the program, the method for suppressing shaft oscillation of compressed air energy storage based on a set impeller provided in the above embodiment is implemented.

[0100] Furthermore, the electronic device further comprises:

[0101] The communication interface 503 is used for communication between the memory 501 and the processor 502 .

[0102] The memory 501 is used to store computer programs that can be executed on the processor 502 .

[0103] The memory 501 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0104] If the memory 501, the processor 502 and the communication interface 503 are implemented independently, the communication interface 503, the memory 501 and the processor 502 can be connected to each other through a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 5 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0105] Optionally, in a specific implementation, if the memory 501, the processor 502 and the communication interface 503 are integrated on a chip, the memory 501, the processor 502 and the communication interface 503 can communicate with each other through an internal interface.

[0106] The processor 502 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention.

[0107] This embodiment also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned method for suppressing shaft oscillation of compressed air energy storage based on a set impeller.

[0108] This embodiment also provides a computer program product, including a computer program, which, when executed, is used to implement the above-mentioned method for suppressing shaft oscillation of compressed air energy storage based on a set impeller.

[0109] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0110] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "N" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0111] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or N executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present invention belong.

[0112] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or N wirings (electronic devices), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways as necessary and then storing it in a computer memory.

[0113] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one or a combination of the following technologies known in the art: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0114] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0115] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0116] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A method for suppressing shaft oscillation of compressed air energy storage based on a set impeller, characterized in that: The following steps are involved: Calculating the shaft segment stiffness coefficient of the turbine and synchronous generator connection system based on a pre-established shaft system model of the turbine and synchronous generator connection system; Using a target impeller that meets a preset condition, the shaft segment stiffness coefficient is adjusted to obtain an adjusted shaft segment stiffness coefficient; The shaft system oscillation frequency of the compressed air energy storage system is suppressed according to the adjusted shaft segment stiffness coefficient.

2. The method for suppressing shaft oscillation of compressed air energy storage based on a set impeller according to claim 1 is characterized in that: The step of calculating the shaft segment stiffness coefficient of the turbine and synchronous generator connection system based on the pre-established shaft system model of the turbine and synchronous generator connection system comprises: Based on the shaft system model, determining a formula for a target corresponding relationship between an input torque disturbance of the turbine and a rotation angle amplitude of a mass block of the turbine; The shaft segment stiffness coefficient of the connection system between the turbine and the synchronous generator is determined according to the formula of the target corresponding relationship.

3. The method for suppressing shaft oscillation of compressed air energy storage based on a set impeller according to claim 2 is characterized in that: The formula of the target correspondence is: Where M is the inertia time constant matrix, K is the stiffness coefficient matrix, θ is the rotation angle column vector of each rigid mass block, T is the input torque column vector of each rigid mass block, ω d is the frequency of the external disturbance.

4. The method for suppressing shaft oscillation of compressed air energy storage based on a set impeller according to claim 1 is characterized in that: The step of adjusting the shaft segment stiffness coefficient by using the target set impeller that meets the preset conditions to obtain the adjusted shaft segment stiffness coefficient comprises: Obtaining the shaft segment equivalent stiffness diameter corresponding to the shaft segment stiffness coefficient; The target impeller set that meets the preset conditions is used to adjust the shaft segment equivalent stiffness diameter to obtain the adjusted shaft segment equivalent stiffness diameter, so as to determine the adjusted shaft segment stiffness coefficient according to the adjusted shaft segment equivalent stiffness diameter.

5. The method for suppressing shaft oscillation of compressed air energy storage based on a set impeller according to claim 1 is characterized in that: Before calculating the shaft segment stiffness coefficient of the turbine and synchronous generator connection system based on the pre-established shaft system model of the turbine and synchronous generator connection system, the method further includes: Modeling is performed based on the turbine and the synchronous generator to obtain a rigid mass block; Modeling is performed based on a transmission shaft connecting the turbine and the synchronous generator to obtain an elastic shaft segment; The rigid mass block and the elastic shaft segment are used to obtain a shaft system model of the turbine and synchronous generator connection system.

6. A compressed air energy storage shaft oscillation suppression device based on a set impeller, characterized in that: include: A calculation module, used for calculating the shaft segment stiffness coefficient of the turbine and synchronous generator connection system based on a pre-established shaft system model of the turbine and synchronous generator connection system; A first determination module is used to adjust the shaft segment stiffness coefficient using a target set impeller that meets a preset condition to obtain an adjusted shaft segment stiffness coefficient; A suppression module is used to suppress the shaft system oscillation frequency of the compressed air energy storage system according to the adjusted shaft segment stiffness coefficient.

7. The compressed air energy storage shaft oscillation suppression device based on the set impeller according to claim 6 is characterized in that: The calculation module comprises: A first determination unit is used to determine a formula for a target corresponding relationship between an input torque disturbance of the turbine and a rotation angle amplitude of a mass block of the turbine based on the shaft system model; The second determination unit is used to determine the shaft segment stiffness coefficient of the connection system between the turbine and the synchronous generator according to the formula of the target corresponding relationship.

8. The compressed air energy storage shaft oscillation suppression device based on the set impeller according to claim 7 is characterized in that: The formula of the target correspondence is: Where M is the inertia time constant matrix, K is the stiffness coefficient matrix, θ is the rotation angle column vector of each rigid mass block, T is the input torque column vector of each rigid mass block, ω d is the frequency of the external disturbance.

9. The compressed air energy storage shaft oscillation suppression device based on a set impeller according to claim 6 is characterized in that: The first determining module comprises: An acquisition unit, used for acquiring an equivalent stiffness diameter of the shaft segment corresponding to the stiffness coefficient of the shaft segment; A determination unit is used to adjust the shaft segment equivalent stiffness diameter using the target set impeller that meets the preset conditions to obtain the adjusted shaft segment equivalent stiffness diameter, so as to determine the adjusted shaft segment stiffness coefficient according to the adjusted shaft segment equivalent stiffness diameter.

10. The compressed air energy storage shaft oscillation suppression device based on a set impeller according to claim 6, characterized in that: Also includes: A second determination module is used for modeling the turbine and the synchronous generator to obtain a rigid mass block before calculating the shaft segment stiffness coefficient of the turbine and the synchronous generator connection system based on a pre-established shaft system model of the turbine and the synchronous generator connection system; A third determination module is used for modeling a transmission shaft connecting the turbine and the synchronous generator to obtain an elastic shaft segment before calculating the shaft segment stiffness coefficient of the turbine and the synchronous generator connection system based on a pre-established shaft system model of the turbine and the synchronous generator connection system; The fourth determination module is used to obtain the shaft system model of the turbine and the synchronous generator connection system by using the rigid mass block and the elastic shaft segment before calculating the shaft segment stiffness coefficient of the turbine and the synchronous generator connection system based on the pre-established shaft system model of the turbine and the synchronous generator connection system.

11. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method for suppressing shaft oscillation of compressed air energy storage based on a set impeller as described in any one of claims 1 to 5.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the method for suppressing shaft oscillation of compressed air energy storage based on a set impeller as described in any one of claims 1 to 5.

13. A computer program product, comprising a computer program, characterized in that The computer program is executed by a processor to implement the method for suppressing shaft oscillation of compressed air energy storage based on a set impeller as described in any one of claims 1 to 5.

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