Method for adiabatic compressed air energy storage assisted frequency modulation of wind farm and related components

Abstract

The application provides a method for frequency modulation of a wind power plant assisted by adiabatic compressed air energy storage and related components, which is applied to an adiabatic compressed air energy storage system, and the adiabatic compressed air energy storage system comprises a compression subsystem, a gas storage subsystem, a heat storage subsystem and a generation subsystem; the method comprises the following steps: acquiring a frequency of a power grid; controlling electromagnetic power output by a wind power plant according to the frequency of the power grid; acquiring a working mode of the adiabatic compressed air energy storage; and controlling power consumption of the adiabatic compressed air energy storage system according to the frequency of the power grid and the working mode of the adiabatic compressed air energy storage. The method for frequency modulation of the wind power plant assisted by the adiabatic compressed air energy storage fully taps the bidirectional frequency modulation capability of A-CAES, can effectively realize collaborative control of energy storage and a new energy station, and improves the utilization rate of wind power and the frequency stability of power grid operation.

Description

Technical Field

[0001] This invention relates to the field of power grid frequency regulation technology, and in particular to a method and related components for frequency regulation of wind farms assisted by adiabatic compressed air energy storage. Background Technology

[0002] In recent years, energy and environmental problems have become increasingly serious, posing enormous challenges to countries worldwide. To alleviate these growing problems, new energy power generation technologies have been vigorously promoted and extensively researched. However, their inherent intermittency and instability have significantly limited their development. One effective solution is to develop large-scale energy storage systems. Adiabatic Compressed Air Energy Storage (A-CAES) is a novel large-scale clean physical energy storage technology. Due to its advantages such as large scale, high efficiency, and strong reliability, it can play a positive role in promoting the integration of wind and solar power and improving grid operation, and is considered the energy storage method with the greatest market potential.

[0003] When applied to energy and power systems, the engineering community has accumulated certain technical expertise in areas such as A-CAES (Augmented Energy Storage and Cogeneration), auxiliary peak shaving, and renewable energy integration. However, significant gaps remain in areas such as rapid frequency regulation and harmonious interaction with renewable energy plants. Although some scholars have researched frequency regulation methods for A-CAES, these methods have failed to fully exploit its bidirectional frequency regulation capabilities and have not effectively achieved coordinated control between energy storage and renewable energy plants. Therefore, they have considerable limitations in practical engineering applications. Summary of the Invention

[0004] This invention provides a method and related components for adiabatic compressed air energy storage to assist wind farm frequency regulation, in order to solve the defect of existing technologies that cannot achieve bidirectional frequency regulation, realize wind and energy storage joint frequency regulation, and improve the utilization rate of wind power and the stability level of grid frequency.

[0005] This invention provides a method for frequency regulation of a wind farm assisted by adiabatic compressed air energy storage, applied to an adiabatic compressed air energy storage system. The adiabatic compressed air energy storage system includes a compression subsystem, an air storage subsystem, a thermal storage subsystem, and a power generation subsystem. The method for frequency regulation of a wind farm assisted by adiabatic compressed air energy storage includes: acquiring the frequency of the power grid; controlling the electromagnetic power output of the wind farm according to the frequency of the power grid; acquiring the operating mode of the adiabatic compressed air energy storage; and controlling the power consumption of the adiabatic compressed air energy storage system according to the frequency of the power grid and the operating mode of the adiabatic compressed air energy storage.

[0006] According to the present invention, a method for frequency regulation of a wind farm assisted by adiabatic compressed air energy storage includes controlling the electromagnetic power output of the wind farm according to the frequency of the power grid, wherein if the frequency of the power grid is within a preset power grid frequency range, the electromagnetic power output of the wind farm in MPPT mode is controlled as follows:

[0007]

[0008]

[0009]

[0010]

[0011] Among them, P opt k represents the electromagnetic power output of the wind farm in MPPT mode. opt C is the coefficient of the equivalent wind turbine maximum power point tracking curve; pmax λ is the maximum wind energy utilization coefficient. opt The tip speed ratio corresponding to the maximum wind energy utilization coefficient, where ρ is the air density; r is the blade radius; ω r λ is the fan speed; β is the tip speed ratio; C is the blade pitch angle; p This represents the wind energy utilization coefficient.

[0012] According to the present invention, a method for frequency regulation of a wind farm assisted by adiabatic compressed air energy storage includes controlling the electromagnetic power output of the wind farm according to the frequency of the power grid, wherein if the frequency of the power grid is outside a preset power grid frequency range, the electromagnetic power output of the wind farm is controlled to be P. opt +ΔP w ;

[0013]

[0014] Where, ΔP w Δf is the increment of the equivalent wind turbine output electromagnetic power; k is the frequency change; w1 k is the sag coefficient of the equivalent wind turbine's combined inertia element. w2 It is the inertia coefficient of the equivalent wind turbine's comprehensive inertia element.

[0015] According to a method for frequency regulation of a wind farm assisted by adiabatic compressed air energy storage provided by the present invention, the step of controlling the power consumption of the adiabatic compressed air energy storage system based on the frequency of the power grid and the operating mode of the adiabatic compressed air energy storage system includes: if the adiabatic compressed air energy storage system operates in compression energy storage mode, then controlling the power consumption of the compression subsystem is as follows:

[0016] P c,ref =P c +ΔP c

[0017]

[0018]

[0019] Among them, P c,ref P is a reference value for the power consumption of the compression subsystem; c and ΔP c These represent the actual power consumption and the change in power consumption of the compression subsystem, respectively; c p,a The specific heat capacity of air at constant pressure; This refers to the mass flow rate of the air passing through the compressor. β is the intake temperature of the i-th stage compressor; c,i η is the pressure ratio of the i-th stage compressor; m η represents the efficiency of the electric motor. c,i Let be the isentropic efficiency of the i-th stage compressor; κ be the isentropic exponent; N c R represents the number of compressor stages. c Δf is the compressor sag coefficient; Δf is the frequency change.

[0020] According to a method for frequency regulation of a wind farm assisted by adiabatic compressed air energy storage provided by the present invention, the step of controlling the power consumption of the adiabatic compressed air energy storage system based on the frequency of the power grid and the operating mode of the adiabatic compressed air energy storage includes: if the adiabatic compressed air energy storage operates in the energy release power generation mode, controlling the power consumption of the power generation system to be:

[0021] P g,ref =P g +ΔP g

[0022]

[0023]

[0024] Among them, P g,ref P is a reference value for the power of the electronic system. g and ΔP g These represent the actual active power output and power change of the power generation system, respectively; c p,a The specific heat capacity of air at constant pressure; The mass flow rate of air passing through the turbine; β is the intake temperature of the i-th stage turbine; g,i η is the expansion ratio of the i-th stage turbine; e The efficiency of the generator; η g,i κ is the isentropic efficiency of the i-th stage turbine; N is the isentropic exponent; g For turbine series; P opt and P w,refThese are the active power output and power reference values ​​under MPPT mode of the wind farm, respectively; T w R is the time constant for the recovery of the auxiliary fan speed during the secondary frequency regulation stage. c K is the droop coefficient of the turbine generator set. AGC Δf is the gain of the second frequency modulation; Δf is the frequency change.

[0025] The present invention also provides an adiabatic compressed air energy storage system, including a compression subsystem, an air storage subsystem, a heat storage subsystem, and a power generation system.

[0026] This invention also provides a device for frequency regulation of a wind farm assisted by adiabatic compressed air energy storage, applied to an adiabatic compressed air energy storage system. The adiabatic compressed air energy storage system includes a compression subsystem, an air storage subsystem, a thermal storage subsystem, and a power generation subsystem. The device for frequency regulation of a wind farm assisted by adiabatic compressed air energy storage includes: a frequency acquisition module for acquiring the frequency of the power grid; a wind farm control module for controlling the electromagnetic power output of the wind farm according to the frequency of the power grid; a working mode acquisition module for acquiring the working mode of the adiabatic compressed air energy storage; and a power consumption control module for controlling the power consumption of the adiabatic compressed air energy storage system according to the frequency of the power grid and the working mode of the adiabatic compressed air energy storage.

[0027] The present invention also provides an electronic device, including 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 frequency regulation of adiabatic compressed air energy storage assisted by wind farm as described above.

[0028] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method for frequency regulation of adiabatic compressed air energy storage assisted by wind farm as described above.

[0029] The present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the method for frequency regulation of adiabatic compressed air energy storage assisted by wind farm as described above.

[0030] This invention provides a method and related components for frequency regulation of wind farms assisted by adiabatic compressed air energy storage (A-CAES), applied to an A-CAES system. The A-CAES system includes a compression subsystem, an air storage subsystem, a thermal storage subsystem, and a power generation subsystem. The method includes: acquiring the grid frequency; controlling the electromagnetic power output of the wind farm according to the grid frequency; acquiring the operating mode of the A-CAES; and controlling the power consumption of the A-CAES system according to the grid frequency and the operating mode. The method for frequency regulation of wind farms assisted by A-CAES fully utilizes the bidirectional frequency regulation capability of A-CAES, effectively achieving coordinated control of energy storage and new energy power plants, improving wind power utilization and grid frequency stability. Attached Figure Description

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

[0032] Figure 1 This is a flowchart illustrating a method for frequency regulation of a wind farm assisted by adiabatic compressed air energy storage, provided by the present invention.

[0033] Figure 2 This is a control block diagram of a thermally adiabatic compressed air energy storage-assisted wind farm frequency regulation provided by the present invention;

[0034] Figure 3 This is a schematic diagram of the structure of an adiabatic compressed air energy storage system provided by the present invention;

[0035] Figure 4 This is a schematic diagram of the structure of a device for adiabatic compressed air energy storage to assist frequency regulation in wind farms, provided by the present invention.

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

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0038] Please refer to Figure 1 , Figure 1 This is a flowchart illustrating a method for frequency regulation of a wind farm assisted by adiabatic compressed air energy storage, as provided by the present invention.

[0039] This invention provides a method for frequency regulation of a wind farm assisted by adiabatic compressed air energy storage, applied to an adiabatic compressed air energy storage system. The adiabatic compressed air energy storage system includes a compression subsystem, an air storage subsystem, a thermal storage subsystem, and a power generation subsystem. The method for frequency regulation of a wind farm assisted by adiabatic compressed air energy storage includes:

[0040] 110: Obtain the frequency of the power grid;

[0041] 120: Control the electromagnetic power output of the wind farm according to the frequency of the power grid;

[0042] 130: Working mode for acquiring adiabatic compressed air energy storage;

[0043] 140: Control the power consumption of the thermal compressed air energy storage system according to the grid frequency and the working mode of the thermal compressed air energy storage.

[0044] Adiabatic compressed air energy storage is a novel large-scale clean physical energy storage technology that can play a positive role in promoting the integration of wind and solar power and improving the operation of the power grid. Its working principle is as follows: During off-peak hours, inexpensive or surplus electricity is used to drive a compressor to compress air, converting electrical energy into air pressure potential energy and compression heat energy for decoupled storage; during peak hours, the stored compression heat is used to raise the temperature of the high-pressure air, which is then used to generate electricity via a turbine generator set by coupling the pressure potential energy and compression heat energy.

[0045] Building a new power system dominated by new energy sources is crucial for promoting energy transformation. Renewable energy sources, represented by wind power and photovoltaics, are poised for rapid development and are expected to dominate the future power structure. However, the "dual high" characteristics of high proportions of renewable energy and high proportions of power electronic equipment significantly reduce the frequency regulation capability of the power grid, posing a severe challenge to the safe and stable operation of the system. To adapt to the development needs of the new power system, it is urgent to enhance the active frequency support capability of wind and solar power plants. A-CAES is considered one of the best collaborators for wind power. As a flexible regulation resource in the power grid, utilizing adiabatic compressed air energy storage to assist wind and solar power plants in participating in grid frequency regulation is a feasible solution. In this invention, the frequency of the power grid is first obtained, which may be within or outside a preset frequency range. Then, the electromagnetic power output by the wind farm is controlled according to the frequency of the power grid to achieve frequency regulation of the power grid by the wind farm. In adiabatic compressed air energy storage systems, it is also necessary to obtain the working mode of the adiabatic compressed air energy storage system. This working mode may be either compression energy storage mode or energy release power generation mode. Then, the power consumption of the adiabatic compressed air energy storage system is controlled according to the grid frequency and the working mode of the adiabatic compressed air energy storage system to achieve frequency regulation of the grid by the adiabatic compressed air energy storage system. This method fully utilizes the bidirectional frequency regulation capability of A-CAES and can more effectively realize the coordinated control of energy storage and new energy power plants.

[0046] In summary, the method of adiabatic compressed air energy storage to assist wind farm frequency regulation of the present invention utilizes the bidirectional frequency regulation capability of energy storage to achieve joint frequency regulation of wind and energy storage, which can effectively improve the utilization rate of wind power and the stability level of grid frequency.

[0047] Based on the above embodiments:

[0048] Please refer to Figure 2 , Figure 2 This invention provides a control block diagram for frequency regulation of a wind farm assisted by adiabatic compressed air energy storage.

[0049] As a preferred embodiment, controlling the electromagnetic power output of the wind farm according to the grid frequency includes: if the grid frequency is within a preset grid frequency range, then controlling the electromagnetic power output of the wind farm in MPPT mode is:

[0050]

[0051]

[0052]

[0053]

[0054] Among them, P optk represents the electromagnetic power output of the wind farm in MPPT mode. opt C is the coefficient of the equivalent wind turbine maximum power point tracking curve; pmax λ is the maximum wind energy utilization coefficient. opt The tip speed ratio corresponding to the maximum wind energy utilization coefficient, where ρ is the air density; r is the blade radius; ω r λ is the fan speed; β is the tip speed ratio; C is the blade pitch angle; p This represents the wind energy utilization coefficient.

[0055] In this embodiment, if the wind farm adopts a single-unit equivalent aggregation model, the captured mechanical power is:

[0056]

[0057] in

[0058]

[0059]

[0060]

[0061] In the formula, ρ is the air density; r is the radius of the wind turbine blade; ω r λ is the fan speed; β is the tip speed ratio; C is the blade pitch angle; p This represents the wind energy utilization coefficient.

[0062] ΔP d Δf is the power imbalance; H is the frequency change; D is the system's equivalent inertial constant; and D is the load active power-frequency regulation coefficient.

[0063] When the grid frequency is within the preset grid frequency range, the wind farm is controlled to always be in MPPT (Maximum Power Point Tracking) mode under normal operating conditions. At this time, the electromagnetic power output by the wind farm can be expressed as...

[0064]

[0065] In the formula, P opt k represents the electromagnetic power output of the wind farm in MPPT mode. opt C is the coefficient of the equivalent wind turbine maximum power point tracking curve; pmax λ is the maximum wind energy utilization coefficient. optThis represents the tip speed ratio corresponding to the maximum wind energy utilization coefficient. Therefore, using the method described in this embodiment, the adiabatic compressed air energy storage determines its charging and discharging state and power level according to the grid dispatch instructions and the energy storage SOC (State of Charge), realizing wind and energy storage joint frequency regulation, which can effectively improve the utilization rate of wind power and the grid frequency stability level.

[0066] As a preferred embodiment, controlling the electromagnetic power output of the wind farm according to the grid frequency includes: if the grid frequency is outside a preset grid frequency range, then controlling the electromagnetic power output of the wind farm to be P. opt +ΔP w ;

[0067]

[0068] Wherein, ΔP w Δf is the increment of the equivalent wind turbine output electromagnetic power; k is the frequency change; w1 k is the sag coefficient of the equivalent wind turbine's combined inertia element. w2 It is the inertia coefficient of the equivalent wind turbine's comprehensive inertia element.

[0069] Most renewable energy generators operate in maximum power point tracking (MPPT) mode, unable to actively participate in grid frequency regulation and only having room for downward frequency adjustment. While optimizing converter control strategies, such as applying virtual inertia control and droop control, can enable frequency regulation, these additional controls increase the workload on the converter. Doubly fed induction generators connect their stators to the grid, releasing some rotor kinetic energy to suppress initial frequency changes after active power disturbances; however, wind turbines have relatively small rotational inertia, limiting their frequency support capabilities and facing the risk of secondary frequency drops during speed recovery.

[0070] Considering situations where the obtained grid frequency is outside the preset grid frequency range, such as when the grid experiences a power deficit, in this embodiment, the electromagnetic power output by the wind farm is controlled to be P. opt +ΔP w The increment of the equivalent wind turbine's output electromagnetic power is

[0071]

[0072] In the formula, ΔP w Δf is the increment of the equivalent wind turbine output electromagnetic power; k is the frequency change; w1 k is the sag coefficient of the equivalent wind turbine's combined inertia element. w2 It is the inertia coefficient of the equivalent wind turbine's comprehensive inertia element.

[0073] Within the timescale of primary frequency regulation of a wind farm, the wind speed can be approximated as constant, and thus the mechanical power captured by the equivalent wind turbine remains essentially constant. Because the increase in electromagnetic power output by the equivalent wind turbine exceeds the increase in mechanical power input, the wind farm decelerates, deviating from its maximum power point and entering the inertial response frequency regulation stage. The rotor decelerates until the rotor speed reaches its minimum limit ω. min When the wind farm exits frequency regulation (ΔP) w =0). Therefore, by adopting the method of this embodiment, the wind farm can participate in the grid frequency regulation to the greatest extent, the wind power utilization rate is high, and the grid frequency can be restored to normal quickly.

[0074] As a preferred embodiment, controlling the power consumption of the adiabatic compressed air energy storage system according to the grid frequency and the operating mode of the adiabatic compressed air energy storage includes: if the adiabatic compressed air energy storage operates in compression energy storage mode, then controlling the power consumption of the compression subsystem is as follows:

[0075] P c,ref =P c +ΔP c

[0076]

[0077]

[0078] Among them, P c,ref P is a reference value for the power consumption of the compression subsystem; c and ΔP c These represent the actual power consumption and the change in power consumption of the compression subsystem, respectively; c p,a The specific heat capacity of air at constant pressure; This refers to the mass flow rate of the air passing through the compressor. β is the intake temperature of the i-th stage compressor; c,i η is the pressure ratio of the i-th stage compressor; m η represents the efficiency of the electric motor. c,i Let be the isentropic efficiency of the i-th stage compressor; κ be the isentropic exponent; N c R represents the number of compressor stages. c Δf is the compressor sag coefficient; Δf is the frequency change.

[0079] Considering that the obtained operating mode of the adiabatic compressed air energy storage is compression energy storage mode, in this embodiment, the compression subsystem of the A-CAES assists the wind farm in participating in grid frequency regulation, and is divided into an inertial response stage and a primary frequency regulation stage according to different time scales of the grid frequency response. The inertial response is the spontaneous behavior of the rotating energy storage device. In the primary frequency regulation stage, the control unit detects the grid frequency deviation, and the compressor, based on its active power-frequency droop characteristic, reduces compression power consumption, thereby reducing power imbalance.

[0080] P c,ref =P c +ΔP c

[0081]

[0082]

[0083] Among them, P c,ref P is a reference value for the power consumption of the compression subsystem; c and ΔP c These represent the actual power consumption and the change in power consumption of the compression subsystem, respectively; c p,a The specific heat capacity of air at constant pressure; This refers to the mass flow rate of the air passing through the compressor. β is the intake temperature of the i-th stage compressor; c,i η is the pressure ratio of the i-th stage compressor; m η represents the efficiency of the electric motor. c,i Let be the isentropic efficiency of the i-th stage compressor; κ be the isentropic exponent; N c R represents the number of compressor stages. c Here, denoted by Δf, represents the compressor droop coefficient; Δf represents the frequency change. Therefore, by employing the method described in this embodiment, the regulation capability of the adiabatic compressed air energy storage system is improved in response to grid frequency changes, ensuring the frequency stability of the grid operation.

[0084] As a preferred embodiment, controlling the power consumption of the adiabatic compressed air energy storage system according to the grid frequency and the operating mode of the adiabatic compressed air energy storage includes: if the adiabatic compressed air energy storage operates in the energy release power generation mode, controlling the power consumption of the power generation system as follows:

[0085] P g,ref =P g +ΔP g

[0086]

[0087]

[0088] Among them, P g,ref P is a reference value for the power of the electronic system. g and ΔP g These represent the actual active power output and power change of the power generation system, respectively; c p,a The specific heat capacity of air at constant pressure; The mass flow rate of air passing through the turbine; β is the intake temperature of the i-th stage turbine; g,i η is the expansion ratio of the i-th stage turbine; eThe efficiency of the generator; η g,i κ is the isentropic efficiency of the i-th stage turbine; N is the isentropic exponent; g For turbine series; P opt and P w,ref These are the active power output and power reference values ​​under MPPT mode of the wind farm, respectively; T w R is the time constant for the recovery of the auxiliary fan speed during the secondary frequency regulation stage. c K is the droop coefficient of the turbine generator set. AGC Δf is the gain of the second frequency modulation; Δf is the frequency change.

[0089] Considering that the obtained working mode of the adiabatic compressed air energy storage is the energy release and power generation mode, in this embodiment, the power generation system of A-CAES assists the wind farm in participating in grid frequency regulation, and is divided into inertial response stage, primary frequency regulation stage, and secondary frequency regulation stage according to different time scales of grid frequency response. Inertial response is the spontaneous behavior of the rotating energy storage device. In the primary frequency regulation stage, the control unit detects the grid frequency deviation, and the turbine generator set increases its active power output according to its active power-frequency droop characteristic, thereby reducing the power imbalance. In the secondary frequency regulation stage, in addition to increasing output according to the regional deviation signal, the turbine generator set also needs to increase output to compensate for the power imbalance of the wind farm to assist in the recovery of wind turbine speed. The power consumption of the power generation system is:

[0090] P g,ref =P g +ΔP g

[0091]

[0092]

[0093] Among them, P g,ref P is a reference value for the power of the electronic system. g and ΔP g These represent the actual active power output and power change of the power generation system, respectively; c p,a The specific heat capacity of air at constant pressure; The mass flow rate of air passing through the turbine; β is the intake temperature of the i-th stage turbine; g,i η is the expansion ratio of the i-th stage turbine; e The efficiency of the generator; η g,i κ is the isentropic efficiency of the i-th stage turbine; N is the isentropic exponent; g For turbine series; P opt and P w,ref These are the active power output and power reference values ​​under MPPT mode of the wind farm, respectively; T w R is the time constant for the recovery of the auxiliary fan speed during the secondary frequency regulation stage.c K is the droop coefficient of the turbine generator set. AGC Δf represents the secondary frequency regulation gain; Δf represents the frequency change. Therefore, by adopting the method of this embodiment, the bidirectional frequency regulation capability of energy storage is used to achieve joint frequency regulation of wind and energy storage, thereby improving the utilization rate of wind power and the stability level of grid frequency.

[0094] The present invention also provides an adiabatic compressed air energy storage system, including a compression subsystem, an air storage subsystem, a heat storage subsystem, and a power generation system.

[0095] The specific structure of an adiabatic compressed air energy storage system may include a compression subsystem, an air storage subsystem, a thermal storage subsystem, a power generation system, and other auxiliary equipment arranged sequentially along the air intake direction. Please refer to [reference needed]. Figure 3 , Figure 3 This invention provides a schematic diagram of an adiabatic compressed air energy storage system. The electric motor 301, first-stage compressor 302, first-stage compressor-side heat exchanger 303, second-stage compressor 304, and second-stage compressor-side heat exchanger 305 together constitute the compression subsystem; the gas storage subsystem 307 can be a natural gas storage space such as an underground salt cavern or aquifer, or a man-made pressure vessel such as pipeline steel; the low-temperature heat storage tank 308 and the high-temperature heat storage tank 309 together constitute the heat storage subsystem; the generator-side throttle valve 311, first-stage turbine-side heat exchanger 312, first-stage turbine 313, second-stage turbine-side heat exchanger 314, second-stage turbine 315, and generator 316 together constitute the power generation system. The low-temperature circulating oil pump 306 and the high-temperature circulating oil pump 310 are used to control the flow rate of the heat transfer oil, thereby controlling the temperature of the high-pressure air; the generator-side throttle valve 311 is used to maintain a constant turbine inlet pressure.

[0096] For a description of the adiabatic compressed air energy storage system provided by the present invention, please refer to the above method embodiments; the present invention will not be described again here.

[0097] Please refer to Figure 4 , Figure 4 This is a schematic diagram of the structure of a device for adiabatic compressed air energy storage to assist in frequency regulation of a wind farm, provided by the present invention.

[0098] This invention also provides a device for frequency regulation of a wind farm assisted by adiabatic compressed air energy storage, applied to an adiabatic compressed air energy storage system. The adiabatic compressed air energy storage system includes a compression subsystem, an air storage subsystem, a thermal storage subsystem, and a power generation subsystem. The device includes: a frequency acquisition module 410 for acquiring the grid frequency; a wind farm control module 420 for controlling the electromagnetic power output of the wind farm according to the grid frequency; a working mode acquisition module 430 for acquiring the working mode of the adiabatic compressed air energy storage; and a power consumption control module 440 for controlling the power consumption of the adiabatic compressed air energy storage system according to the grid frequency and the working mode of the adiabatic compressed air energy storage. The device in this embodiment can collect real-time operating status data and real-time wind speed data from the compression subsystem, thermal storage subsystem, air storage subsystem, and power generation subsystem, receive power reference values ​​from the compression subsystem, power generation subsystem, and wind farm, and implement a method for frequency regulation of a wind farm assisted by adiabatic compressed air energy storage based on the collected data and a preset control law.

[0099] For a description of the device for adiabatic compressed air energy storage to assist wind farm frequency regulation provided by the present invention, please refer to the above method embodiments; the present invention will not be described again here.

[0100] Figure 5 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 5 As shown, the electronic device may include a processor 510, a communication interface 520, a memory 530, and a communication bus 540. The processor 510, communication interface 520, and memory 530 communicate with each other via the communication bus 540. The processor 510 can call logical instructions from the memory 530 to execute a method for frequency regulation of adiabatic compressed air energy storage assisted by wind farms. This method is applied to an adiabatic compressed air energy storage system, which includes a compression subsystem, an air storage subsystem, a thermal storage subsystem, and a power generation subsystem. The method for frequency regulation of adiabatic compressed air energy storage assisted by wind farms includes: acquiring the grid frequency; controlling the electromagnetic power output of the wind farm according to the grid frequency; acquiring the operating mode of the adiabatic compressed air energy storage; and controlling the power consumption of the adiabatic compressed air energy storage system according to the grid frequency and the operating mode of the adiabatic compressed air energy storage.

[0101] Furthermore, the logical instructions in the aforementioned memory 530 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, essentially, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0102] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the method for frequency regulation of adiabatic compressed air energy storage assisted by the above-mentioned methods, applied to an adiabatic compressed air energy storage system. The adiabatic compressed air energy storage system includes a compression subsystem, an air storage subsystem, a thermal storage subsystem, and a power generation subsystem. The method for frequency regulation of adiabatic compressed air energy storage assisted by wind farm includes: obtaining the frequency of the power grid; controlling the electromagnetic power output of the wind farm according to the frequency of the power grid; obtaining the working mode of the adiabatic compressed air energy storage; and controlling the power consumption of the adiabatic compressed air energy storage system according to the frequency of the power grid and the working mode of the adiabatic compressed air energy storage.

[0103] In another aspect, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon. When executed by a processor, the computer program implements the method for frequency regulation of adiabatic compressed air energy storage assisted by the above-described methods, and is applied to an adiabatic compressed air energy storage system. The adiabatic compressed air energy storage system includes a compression subsystem, an air storage subsystem, a thermal storage subsystem, and a power generation subsystem. The method for frequency regulation of adiabatic compressed air energy storage assisted by wind farm includes: acquiring the frequency of the power grid; controlling the electromagnetic power output of the wind farm according to the frequency of the power grid; acquiring the operating mode of the adiabatic compressed air energy storage; and controlling the power consumption of the adiabatic compressed air energy storage system according to the frequency of the power grid and the operating mode of the adiabatic compressed air energy storage.

[0104] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0105] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for frequency regulation of a wind farm assisted by adiabatic compressed air energy storage, characterized in that, It is applied to an adiabatic compressed air energy storage system, which includes a compression subsystem, an air storage subsystem, a heat storage subsystem, and a power generation system; The method for frequency regulation of wind farms using adiabatic compressed air energy storage includes: Obtain the frequency of the power grid; The electromagnetic power output of the wind farm is controlled according to the frequency of the power grid; Working mode for obtaining adiabatic compressed air energy storage; The power consumption of the thermal compressed air energy storage system is controlled according to the frequency of the power grid and the working mode of the thermal compressed air energy storage system. The control of the electromagnetic power output by the wind farm according to the frequency of the power grid includes: If the frequency of the power grid is within the preset power grid frequency range, then the electromagnetic power output by controlling the wind farm to operate in MPPT mode is: ， in, This refers to the electromagnetic power output by the wind farm in MPPT mode. The coefficients for the equivalent wind turbine maximum power tracking curve; This represents the maximum wind energy utilization factor. The tip speed ratio corresponding to the maximum wind energy utilization coefficient. air density; The radius of the wind turbine blades; This refers to the fan speed; The tip speed ratio; The pitch angle; This is the wind energy utilization coefficient.

2. The method for frequency regulation of a wind farm assisted by adiabatic compressed air energy storage according to claim 1, characterized in that, The control of the electromagnetic power output by the wind farm according to the frequency of the power grid includes: If the frequency of the power grid is outside the preset power grid frequency range, then the electromagnetic power output of the wind farm is controlled to be... ; ， in, This represents the increment of the equivalent wind turbine's output electromagnetic power; It is the change in frequency; The sag coefficient is the equivalent of the combined inertia of the wind turbine. It is the inertia coefficient of the equivalent wind turbine's comprehensive inertia element.

3. The method for frequency regulation of a wind farm assisted by adiabatic compressed air energy storage according to any one of claims 1 to 2, characterized in that, The step of controlling the power consumption of the adiabatic compressed air energy storage system according to the frequency of the power grid and the operating mode of the adiabatic compressed air energy storage includes: If the adiabatic compressed air energy storage operates in compression energy storage mode, then the power consumption of the compression subsystem is controlled as follows: ， in, This is a reference value for the power consumption of the compression subsystem; and These are the actual power consumption and the change in power consumption of the compression subsystem, respectively. The specific heat capacity of air at constant pressure; This refers to the mass flow rate of the air passing through the compressor. For the first The intake temperature of the stage compressor; For the first The pressure ratio of the stage compressor; The efficiency of the electric motor; For the first The isentropic efficiency of the stage compressor; It is the isentropic exponent; The number of compressor stages; This refers to the compressor droop coefficient. This represents the change in frequency.

4. The method for frequency regulation of a wind farm assisted by adiabatic compressed air energy storage according to any one of claims 1 to 2, characterized in that, The step of controlling the power consumption of the adiabatic compressed air energy storage system according to the frequency of the power grid and the operating mode of the adiabatic compressed air energy storage includes: If the adiabatic compressed air energy storage operates in the energy release power generation mode, the power consumption of the power generation system is controlled as follows: ， in, This is a reference value for the power of the electronic system; and These are the actual active power output and power change of the power generation system, respectively. The specific heat capacity of air at constant pressure; The mass flow rate of air passing through the turbine; For the first Inlet air temperature of the turbine; For the first The expansion ratio of a multi-stage turbine; The efficiency of the generator; For the first The isentropic efficiency of a multi-stage turbine; It is the isentropic exponent; For turbine series; and These are the active power output and power reference values ​​under the MPPT mode of the wind farm, respectively; This is the time constant for the recovery of the auxiliary fan speed during the secondary frequency regulation stage; This refers to the sag coefficient of the turbine generator set; This is the second frequency modulation gain; This represents the change in frequency.

5. An adiabatic compressed air energy storage system, characterized in that, The adiabatic compressed air energy storage system adopts the method for frequency regulation of wind farms assisted by adiabatic compressed air energy storage as described in any one of claims 1 to 4; the adiabatic compressed air energy storage system includes a compression subsystem, an air storage subsystem, a thermal storage subsystem, and a power generation subsystem.

6. A device for adiabatic compressed air energy storage to assist frequency regulation in wind farms, characterized in that, It is applied to an adiabatic compressed air energy storage system, which includes a compression subsystem, an air storage subsystem, a heat storage subsystem, and a power generation system; The device for adiabatic compressed air energy storage to assist wind farm frequency regulation includes: Frequency acquisition module, used to acquire the frequency of the power grid; A wind farm control module is used to control the electromagnetic power output by the wind farm according to the frequency of the power grid; The working mode acquisition module is used to acquire the working mode of the adiabatic compressed air energy storage. A power consumption control module is used to control the power consumption of the thermal compressed air energy storage system according to the frequency of the power grid and the working mode of the thermal compressed air energy storage. The control of the electromagnetic power output by the wind farm according to the frequency of the power grid includes: If the frequency of the power grid is within the preset power grid frequency range, then the electromagnetic power output by controlling the wind farm to operate in MPPT mode is: ， in, This refers to the electromagnetic power output by the wind farm in MPPT mode. The coefficients for the equivalent wind turbine maximum power tracking curve; This represents the maximum wind energy utilization factor. The tip speed ratio corresponding to the maximum wind energy utilization coefficient. air density; The radius of the wind turbine blades; This refers to the fan speed; The tip speed ratio; The pitch angle; This is the wind energy utilization coefficient.

7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the method for frequency regulation of adiabatic compressed air energy storage assisted by any one of claims 1 to 4.

8. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the method for frequency regulation of adiabatic compressed air energy storage assisted by any one of claims 1 to 4.

9. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the method for frequency regulation of adiabatic compressed air energy storage assisted by any one of claims 1 to 4.

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