Hybrid energy storage auxiliary wind power primary frequency modulation control method and device

Abstract

The invention discloses a hybrid energy storage auxiliary wind power primary frequency modulation control method and device, and the method comprises the steps: decomposing the current wind power primary frequency modulation power, and obtaining the current fan primary frequency modulation power; obtaining a wind power primary frequency modulation power prediction value at a future moment, and calculating the wind turbine primary frequency modulation power at the future moment according to the wind power primary frequency modulation power prediction value at the future moment; calculating a wind power fluctuation value according to the primary frequency modulation power of the fan at the future moment and the primary frequency modulation power of the fan at the current moment; and determining the power of the compensated hybrid energy storage system participating in the primary frequency modulation according to the wind power fluctuation value, so that the hybrid energy storage system performs the primary frequency modulation according to the power of the compensated hybrid energy storage system participating in the primary frequency modulation. The stability and the response speed of the wind power system in the process of participating in the primary frequency modulation of the power grid are improved, and the reliability and the economical efficiency of wind power integration are improved.

Description

Technical Field

[0001] The present invention relates to a primary frequency regulation control strategy for a hybrid energy storage system, and in particular to a hybrid energy storage-assisted wind power primary frequency regulation control method and device. Background Art

[0002] With the rapid development of wind power generation technology, large-capacity and high-proportion wind power systems are connected to the power grid, and the difficulty of power system frequency regulation has increased. Energy storage technology has become an ideal choice for assisting wind power primary frequency regulation due to its advantages such as fast response speed, high conversion efficiency, and basically unlimited charging and discharging times. At present, wind turbines control active power through virtual inertia control, overspeed control, and pitch control, and participate in grid frequency regulation. At present, the application research of hybrid energy storage systems focuses on assisting thermal power units in frequency regulation and smoothing wind power fluctuations, without considering that wind power fluctuations will affect the power of wind turbines participating in primary frequency regulation. Therefore, how to optimize the output control of hybrid energy storage systems in combination with wind power fluctuations is a technical problem that urgently needs to be solved in existing technologies. Summary of the invention

[0003] In order to solve at least one technical problem in the above-mentioned background technology, the present invention proposes a hybrid energy storage assisted wind power primary frequency regulation control method and device.

[0004] In order to achieve the above object, according to one aspect of the present invention, a hybrid energy storage assisted wind power primary frequency regulation control method is provided, the method comprising:

[0005] The wind power primary frequency modulation power P at the current moment N Decompose it to get the fan primary frequency modulation power P at the current moment wind ;

[0006] Get the predicted value P of wind power primary frequency regulation power at the future moment F , according to the predicted value of wind power primary frequency regulation power P at the future moment F Calculate the primary frequency modulation power P of the fan at the future moment pr e;

[0007] According to the fan primary frequency modulation power P at the future moment pre and the fan primary frequency modulation power P at the current moment wind , the wind power fluctuation value ΔP is calculated;

[0008] According to the wind power fluctuation value ΔP, the power P of the hybrid energy storage system participating in the primary frequency regulation after compensation is determined HESS-w , so that the hybrid energy storage system participates in the primary frequency modulation power P according to the compensated hybrid energy storage system HESS-w Perform a frequency modulation.

[0009] Optionally, the hybrid energy storage assisted wind power primary frequency regulation control method further includes:

[0010] Perform a first-order high-pass filter on the frequency deviation Δf to obtain a high-frequency signal Δf H and low frequency signal Δf L ;

[0011] The high frequency signal Δf is transformed into H Decomposed into high frequency components Δf H-H and low frequency component Δf H-L ;

[0012] The hybrid energy storage system is made to participate in the primary frequency modulation according to the power P of the compensated hybrid energy storage system. HESS-w Perform a frequency tuning, including:

[0013] The flywheel energy storage system in the hybrid energy storage system is made to H-H And the power P of the compensated hybrid energy storage system participating in primary frequency regulation HESS-w Perform a frequency modulation;

[0014] The lithium battery energy storage system in the hybrid energy storage system is made to H-L And the power P of the compensated hybrid energy storage system participating in primary frequency regulation HESS-w Perform a frequency modulation.

[0015] Optionally, the hybrid energy storage assisted wind power primary frequency regulation control method further includes:

[0016] The wind turbine is based on the low-frequency signal Δf L Perform a frequency modulation.

[0017] Optionally, the power P of the hybrid energy storage system participating in the primary frequency regulation after compensation is determined according to the wind power fluctuation value ΔP. HESS-w , so that the hybrid energy storage system participates in the primary frequency modulation power P according to the compensated hybrid energy storage system HESS-w Perform a frequency tuning, including:

[0018] When the wind power fluctuation value ΔP is equal to 0, the hybrid energy storage system only considers the grid frequency fluctuation to perform frequency regulation once.

[0019] Optionally, the power P of the hybrid energy storage system participating in the primary frequency regulation after compensation is determined according to the wind power fluctuation value ΔP. HESS-w ,include:

[0020] When ΔP>0, |Δf|>f d , when Δf>0, determine the power P of the compensated hybrid energy storage system participating in the primary frequency regulationHESS-w for:

[0021] P HESS-w =P HESS-O -ΔP+P HESS-N

[0022] Where Δf is the frequency deviation, f d is the frequency deviation threshold, P HESS-O is the power of the hybrid energy storage system participating in primary frequency regulation at the current moment, P HESS-N The power increment for the hybrid energy storage system to participate in primary frequency regulation to cope with grid frequency fluctuations.

[0023] Optionally, the power P of the hybrid energy storage system participating in the primary frequency regulation after compensation is determined according to the wind power fluctuation value ΔP. HESS-w ,include:

[0024] When ΔP>0, |Δf|>f d , when Δf<0, determine the power P of the compensated hybrid energy storage system participating in the primary frequency regulation HESS-w for:

[0025] P HESS-w =P HESS-O -ΔP-P HESS-N

[0026] Where Δf is the frequency deviation, f d is the frequency deviation threshold, P HESS-O is the power of the hybrid energy storage system participating in primary frequency regulation at the current moment, P HESS-N The power increment for the hybrid energy storage system to participate in primary frequency regulation to cope with grid frequency fluctuations.

[0027] Optionally, the power P of the hybrid energy storage system participating in the primary frequency regulation after compensation is determined according to the wind power fluctuation value ΔP. HESS-w ,include:

[0028] When ΔP>0, |Δf|<f d When the power P of the compensated hybrid energy storage system participating in the primary frequency regulation is determined HESS-w for:

[0029] P HESS-w =P HESS-O -ΔP

[0030] Where Δf is the frequency deviation, f d is the frequency deviation threshold, P HESS-O It is the power of the hybrid energy storage system participating in primary frequency regulation at the current moment.

[0031] Optionally, the power P of the hybrid energy storage system participating in the primary frequency regulation after compensation is determined according to the wind power fluctuation value ΔP. HESS-w ,include:

[0032] When ΔP<0, |Δf|>f d , when Δf>0, determine the power P of the compensated hybrid energy storage system participating in the primary frequency regulation HESS-w for:

[0033] P HESS-w =P HESS-O +ΔP-P HESS-N

[0034] Where Δf is the frequency deviation, f d is the frequency deviation threshold, P HESS-O is the power of the hybrid energy storage system participating in primary frequency regulation at the current moment, P HESS-N The power increment for the hybrid energy storage system to participate in primary frequency regulation to cope with grid frequency fluctuations.

[0035] Optionally, the power P of the hybrid energy storage system participating in the primary frequency regulation after compensation is determined according to the wind power fluctuation value ΔP. HESS-w ,include:

[0036] When ΔP<0, |Δf|>f d , when Δf<0, determine the power P of the compensated hybrid energy storage system participating in the primary frequency regulation HESS-w for:

[0037] P HESS-w =P HESS-O +ΔP+P HESS-N

[0038] Where Δf is the frequency deviation, f d is the frequency deviation threshold, P HESS-O is the power of the hybrid energy storage system participating in primary frequency regulation at the current moment, P HESS-N The power increment for the hybrid energy storage system to participate in primary frequency regulation to cope with grid frequency fluctuations.

[0039] Optionally, the power P of the hybrid energy storage system participating in the primary frequency regulation after compensation is determined according to the wind power fluctuation value ΔP. HESS-w ,include:

[0040] When ΔP<0, |Δf|<f d When the power P of the compensated hybrid energy storage system participating in the primary frequency regulation is determined HESS-w for:

[0041] P HESS-w =P HESS-O +ΔP

[0042] Where Δf is the frequency deviation, f d is the frequency deviation threshold, P HESS-O It is the power of the hybrid energy storage system participating in primary frequency regulation at the current moment.

[0043] In order to achieve the above object, according to another aspect of the present invention, a hybrid energy storage assisted wind power primary frequency regulation control device is provided, the device comprising:

[0044] The wind turbine primary frequency modulation power determination unit at the current moment is used to determine the wind power primary frequency modulation power P at the current moment. N Decompose it to get the fan primary frequency modulation power P at the current moment wind ;

[0045] The wind turbine primary frequency regulation power determination unit at the future time is used to obtain the predicted value P of wind power primary frequency regulation power at the future time. F , according to the predicted value of wind power primary frequency regulation power P at the future moment F Calculate the primary frequency modulation power P of the fan at the future moment pre ;

[0046] The wind power fluctuation value determination unit is used to determine the wind turbine primary frequency modulation power P at a future time. pre and the fan primary frequency modulation power P at the current moment wind , the wind power fluctuation value ΔP is calculated;

[0047] The primary frequency regulation control unit of the hybrid energy storage system is used to determine the power P of the hybrid energy storage system participating in the primary frequency regulation after compensation according to the wind power fluctuation value ΔP. HESS-w , so that the hybrid energy storage system participates in the primary frequency modulation power P according to the compensated hybrid energy storage system HESS-w Perform a frequency modulation.

[0048] Optionally, the hybrid energy storage assisted wind power primary frequency regulation control device further includes:

[0049] The frequency deviation filtering processing unit is used to perform a first-order high-pass filtering process on the frequency deviation Δf to obtain a high-frequency signal Δf H and low frequency signal Δf L ;

[0050] A high-frequency signal decomposition unit is used to decompose the high-frequency signal Δf using the ICEEMDAN method. H Decomposed into high frequency components Δf H-H and low frequency component Δf H-L ;

[0051] The primary frequency regulation control unit of the hybrid energy storage system comprises:

[0052] The primary frequency modulation control module of the flywheel energy storage system is used to adjust the frequency of the flywheel energy storage system in the hybrid energy storage system according to the high frequency component Δf H-H And the power P of the compensated hybrid energy storage system participating in primary frequency regulation HESS-w Perform a frequency modulation;

[0053] The primary frequency modulation control module of the lithium battery energy storage system is used to adjust the frequency of the lithium battery energy storage system in the hybrid energy storage system according to the low frequency component Δf H-L And the power P of the compensated hybrid energy storage system participating in primary frequency regulation HESS-w Perform a frequency modulation.

[0054] In order to achieve the above-mentioned purpose, according to another aspect of the present invention, a computer device is also provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above-mentioned hybrid energy storage assisted wind power primary frequency regulation control method when executing the computer program.

[0055] In order to achieve the above-mentioned purpose, according to another aspect of the present invention, a computer-readable storage medium is further provided, on which a computer program / instruction is stored, and when the computer program / instruction is executed by a processor, the steps of the above-mentioned hybrid energy storage assisted wind power primary frequency regulation control method are implemented.

[0056] In order to achieve the above-mentioned purpose, according to another aspect of the present invention, a computer program product is also provided, including a computer program / instruction, which, when executed by a processor, implements the steps of the above-mentioned hybrid energy storage assisted wind power primary frequency regulation control method.

[0057] The beneficial effects of the present invention are:

[0058] The present invention first determines the wind power fluctuation value based on the predicted value of the wind power primary frequency regulation power at a future moment, and then determines the power of the compensated hybrid energy storage system participating in the primary frequency regulation based on the wind power fluctuation value, and then enables the hybrid energy storage system to perform primary frequency regulation according to the determined power participating in the primary frequency regulation, thereby improving the stability and response speed of the wind power system in the process of participating in the primary frequency regulation of the power grid, and helping to improve the reliability and economy of wind power grid connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0060] Figure 1This is a first flow chart of a hybrid energy storage-assisted wind power primary frequency regulation control method according to an embodiment of the present invention;

[0061] Figure 2 This is a second flow chart of the hybrid energy storage assisted wind power primary frequency regulation control method according to an embodiment of the present invention;

[0062] Figure 3 This is a third flow chart of the hybrid energy storage assisted wind power primary frequency regulation control method according to an embodiment of the present invention;

[0063] Figure 4 It is a technical roadmap of an embodiment of the present invention;

[0064] Figure 5 This is a comprehensive wind power fluctuation and grid frequency fluctuation analysis diagram of an embodiment of the present invention;

[0065] Figure 6 This is a power distribution diagram of a wind turbine and a hybrid energy storage system according to an embodiment of the present invention;

[0066] Figure 7 It is a structural block diagram of a hybrid energy storage assisted wind power primary frequency regulation control device according to an embodiment of the present invention;

[0067] Figure 8 It is a schematic diagram of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0068] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0069] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0070] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or apparatus.

[0071] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0072] The embodiment of the present invention proposes a hybrid energy storage assisted wind power primary frequency regulation control strategy that takes into account the wind power at future times. The strategy first analyzes the relationship between the wind power forecast at future times and the wind power at the current time, and issues a primary frequency regulation action instruction to the hybrid energy storage system according to the real-time situation. The strategy formulates a complete hybrid energy storage system assisted wind power priority control logic, improves the stability and response speed of the wind power system in the process of participating in the primary frequency regulation of the power grid, and provides a new solution for the reliability and economy of wind power grid connection.

[0073] Figure 4 It is a technical roadmap of the embodiment of the present invention, such as Figure 4 As shown, in one embodiment of the present invention, the entire process of the present invention includes the following steps: step 1, wind power fluctuation analysis; step 2, power grid fluctuation analysis; step 3, hybrid energy storage system pre-instruction; step 4, wind turbine and hybrid energy storage system power allocation; step 5, hybrid energy storage assisted wind turbine primary frequency modulation action.

[0074] Figure 1 is a first flow chart of a hybrid energy storage assisted wind power primary frequency regulation control method according to an embodiment of the present invention. Figure 1 As shown, in one embodiment of the present invention, the hybrid energy storage assisted wind power primary frequency regulation control method of the present invention includes steps S101 to S104.

[0075] Step S101: calculate the wind power primary frequency modulation power P at the current moment. N Decompose it to get the fan primary frequency modulation power P at the current moment wind .

[0076] The present invention analyzes the power fluctuation of wind turbines participating in primary frequency modulation based on the current wind power primary frequency modulation power and the predicted wind power at future times. In the scenario where wind turbines participate in primary frequency modulation, the wind power primary frequency modulation power is an unstable power with nonlinear changes. The present invention can analyze the power fluctuation of wind power primary frequency modulation P at the current moment based on the ICEEMADAN method. NICEEMDAN (Improved Complete Ensemble Empirical Mode Decomposition with Adaptive Noise) is an improved algorithm based on empirical mode decomposition (EMD) for signal decomposition and feature extraction.

[0077] Add i groups of white noise W(i) to the original wind speed sequence to construct a sequence P(i) = P N +ε 1 E[W(i)], get the first group of residuals R 1 =ε 1 N·[P(i)] represents the addition of the first intrinsic mode function (IMF) component E of Gaussian white noise 1 The coefficient to be multiplied when [W(i)].

[0078] Calculate the first modal component M 1 =P N -R 1 .

[0079] Continue to add white noise and use local mean decomposition to calculate the kth group of residuals R k =N{R k-1 +ε k-1 E[W(i)]}, and the first modal component: M l =R l-1 -R l .

[0080] After the calculation and decomposition are completed, all modes and residual numbers are obtained. The decomposition results are reconstructed to perform adaptive power allocation. N , the decomposed fan primary frequency modulation power P wind It can be expressed as:

[0081]

[0082] Where E(k) represents the k-order modal component generated by EMD decomposition; N(i) represents the local mean of the generated signal; and W(i) represents Gaussian white noise. 1 is the number of decomposed IMF components; n 1 is the dividing point; r 1 is the residual; i and j are the component numbers respectively.

[0083] Step S102, obtaining the predicted value P of the primary frequency regulation power of wind power at a future time F , according to the predicted value of wind power primary frequency regulation power P at the future moment F Calculate the primary frequency modulation power P of the fan at the future momentpre .

[0084] In one embodiment of the present invention, the predicted value of wind power primary frequency regulation power P at a future time F It can be predicted based on an existing prediction model or prediction algorithm, which is not the inventive point of the present invention and will not be described in detail.

[0085] When the wind farm has the primary frequency regulation capability, the present invention can use the wind turbine virtual inertia control principle to calculate the wind power primary frequency regulation power prediction value P at the future moment. F Calculate the primary frequency modulation power P of the fan at the future moment pre as follows:

[0086]

[0087] Where Δf is the frequency deviation, f r is the rated frequency of the system, and R is the droop coefficient.

[0088] Step S103: according to the wind turbine primary frequency modulation power P at the future moment pre and the fan primary frequency modulation power P at the current moment wind , the wind power fluctuation value AP is calculated.

[0089] In one embodiment of the present invention, the calculation formula of the wind power fluctuation value AP is as follows:

[0090] AP=P pre -P wind

[0091] Step S104: Determine the power P of the hybrid energy storage system participating in the primary frequency regulation after compensation according to the wind power fluctuation value AP. HESS-w , so that the hybrid energy storage system participates in the primary frequency modulation power P according to the compensated hybrid energy storage system HESS-w Perform a frequency modulation.

[0092] In the present invention, based on the value of the wind power fluctuation value ΔP, the power of the hybrid energy storage system participating in the primary frequency regulation is compensated as appropriate to obtain the compensated power P of the hybrid energy storage system participating in the primary frequency regulation. HESS-w , the specific embodiment can be as follows Figure 5 As shown, this improves the stability and response speed of the wind power system when participating in the primary frequency regulation of the power grid, which helps to improve the reliability and economy of wind power grid connection.

[0093] Figure 2 is a second flow chart of the hybrid energy storage assisted wind power primary frequency regulation control method according to an embodiment of the present invention, such as Figure 2As shown, in one embodiment of the present invention, the hybrid energy storage assisted wind power primary frequency regulation control method of the present invention further includes step S201 and step S202.

[0094] Step S201, performing a first-order high-pass filtering process on the frequency deviation Δf to obtain a high-frequency signal Δf H and low frequency signal Δf L .

[0095] Figure 6 is a power distribution diagram of a wind turbine and a hybrid energy storage system according to an embodiment of the present invention, such as Figure 6 As shown, in the present invention, the first-order high-pass filter is used to process the frequency deviation Δf to obtain a high-frequency signal Δf H and low frequency signal Δf L In the present invention, when distributing, the hybrid energy storage system directly responds to the faster frequency change Δf H , to achieve rapid adjustment of power output, the wind turbine responds to slower frequency changes Δf L .

[0096] Step S202: using the ICEEMDAN method to transform the high frequency signal Δf H Decomposed into high frequency components Δf H-H and low frequency component Δf H-L .

[0097] like Figure 3 As shown, in one embodiment of the present invention, the hybrid energy storage system in the above step S104 is made to participate in the primary frequency modulation according to the power P of the compensated hybrid energy storage system. HESS-w Performing a frequency modulation specifically includes step S301 and step S302.

[0098] Step S301, enabling the flywheel energy storage system in the hybrid energy storage system to generate a high frequency component Δf H-H And the power P of the compensated hybrid energy storage system participating in primary frequency regulation HESS-w Perform a frequency modulation.

[0099] Step S302: The lithium battery energy storage system in the hybrid energy storage system is configured to generate a low-frequency component Δf H-L And the power P of the compensated hybrid energy storage system participating in primary frequency regulation HESS-w Perform a frequency modulation.

[0100] In the present invention, the hybrid energy storage system (HESS) includes a flywheel energy storage system and a lithium battery energy storage system, which respectively undertake frequency modulation tasks of different frequency components. The flywheel energy storage system receives the high frequency component Δf decomposed by ICEEMDAN H-HThe flywheel energy storage has the ability of rapid power output, which is suitable for compensating the insufficient frequency regulation of wind turbines on high-frequency components. The lithium battery energy storage system receives the low-frequency component Δf after ICEEMDAN decomposition. H-L , lithium batteries are suitable for handling slower power regulation tasks and adapting to medium and low frequency fluctuations in grid frequency.

[0101] In the present invention, when the hybrid energy storage system performs a frequency modulation, the flywheel energy storage system comprehensively considers the high-frequency component Δf H-H And the power P of the compensated hybrid energy storage system participating in primary frequency regulation HESS-w Perform frequency modulation. The lithium battery energy storage system comprehensively considers the low-frequency component Δf H-L And the power P of the compensated hybrid energy storage system participating in primary frequency regulation HESS-w The present invention modulates the frequency by H-H Allocated to the flywheel energy storage system, low frequency component Δf H-L Distributed to the lithium battery energy storage system and combined with P HESS-w Compensation is carried out, realizing efficient coordination and dynamic optimization of the hybrid energy storage system in primary frequency regulation, thereby significantly improving the frequency stability of the power grid and the operating efficiency of the energy storage system.

[0102] In one embodiment of the present invention, the hybrid energy storage assisted wind power primary frequency regulation control method of the present invention further includes:

[0103] The wind turbine is based on the low-frequency signal Δf L , perform a frequency modulation.

[0104] In the present invention, the low frequency signal Δf L It reflects the slower fluctuation of grid frequency deviation and has a long-term impact on the overall frequency deviation of the system. The frequency modulation response of wind turbines is usually slow, but their large power output range makes them suitable for handling low-frequency fluctuations. The present invention is based on the low-frequency signal Δf L Dynamically adjust the output power of the wind turbine to make it play a role in low-frequency deviations, and respond to Δf by adjusting the control strategies such as wind turbine speed, power output and blade angle. L And participate in primary frequency regulation. In addition, the power adjustment of wind turbines also needs to be coordinated with the hybrid energy storage system to ensure that the response speed matches the needs of frequency fluctuations.

[0105] In one embodiment of the present invention, the above step S104 determines the power P of the hybrid energy storage system participating in the primary frequency regulation after compensation according to the wind power fluctuation value AP. HESS-w , so that the hybrid energy storage system participates in the primary frequency modulation power P according to the compensated hybrid energy storage system HESS-w Perform a frequency tuning, including:

[0106] When the wind power fluctuation value ΔP is equal to 0, the hybrid energy storage system only considers the grid frequency fluctuation to perform frequency regulation once.

[0107] In the present invention, ΔP=0, indicating that the wind power is completely stable at the current moment without fluctuations. At this time, the hybrid energy storage system only needs to dynamically adjust its own power output according to the grid frequency deviation Δf to ensure the stability of the grid frequency.

[0108] In one embodiment of the present invention, when the wind power fluctuation value ΔP is equal to 0, the flywheel energy storage system is based on the high frequency component Δf H-H Perform frequency modulation once, and the lithium battery energy storage system adjusts the frequency according to the low-frequency component Δf H-L Perform a frequency modulation.

[0109] In one embodiment of the present invention, the power P of the hybrid energy storage system participating in the primary frequency regulation after compensation is determined according to the wind power fluctuation value ΔP in the above step S104. HESS-w ,include:

[0110] When ΔP>0, |Δf|>f d , when Δf>0, determine the power P of the compensated hybrid energy storage system participating in the primary frequency regulation HESS-w for:

[0111] P HESS-w =P HESS-O -ΔP+P HESS-N

[0112] Where Δf is the frequency deviation, f d is the frequency deviation threshold, P HESS-O is the power of the hybrid energy storage system participating in primary frequency regulation at the current moment, P HESS-N The power increment for the hybrid energy storage system to participate in primary frequency regulation to cope with grid frequency fluctuations.

[0113] In the present invention, when the wind power fluctuation value ΔP>0, and |Δf|>f d When Δf>0, the hybrid energy storage system needs to compensate for the fluctuating power of wind power and needs to cope with the frequency fluctuation of the power grid. ΔP>0, which means that the predicted wind power value is higher than the actual output, and the wind power is insufficient. |Δf|>f d , indicating that the grid frequency deviation exceeds the frequency deviation threshold, the frequency deviation is large, Δf>0, indicating that the frequency deviation is positive, indicating that the grid frequency is higher than the rated value. At this time, the energy storage system needs to provide additional power to make up for the wind power gap. In addition, at this time, the grid frequency is high, and the energy storage system provides additional power to consume excess power to help reduce the frequency.

[0114] In the formula, P HESS-Ois the power of the hybrid energy storage system participating in the primary frequency regulation at the current moment, without considering the fluctuation of wind power. By subtracting ΔP, the energy storage system additionally compensates for the power gap caused by insufficient wind power, +P HESS-N The present invention can calculate the additional frequency regulation demand P of the energy storage system based on the grid frequency deviation Δf. HESS-N , reflecting the response of energy storage to grid frequency fluctuations.

[0115] In one embodiment of the present invention, the power P of the hybrid energy storage system participating in the primary frequency regulation after compensation is determined according to the wind power fluctuation value ΔP in the above step S104. HESS-w ,include:

[0116] When ΔP>0, |Δf|>f d , when Δf<0, determine the power P of the compensated hybrid energy storage system participating in the primary frequency regulation HESS-w for:

[0117] P HESS-w =P HESS-O -ΔP-P HESS-N

[0118] Where Δf is the frequency deviation, f d is the frequency deviation threshold, P HESS-O is the power of the hybrid energy storage system participating in primary frequency regulation at the current moment, P HESS-N The power increment for the hybrid energy storage system to participate in primary frequency regulation to cope with grid frequency fluctuations.

[0119] In the present invention, when ΔP>0, and |Δf|>f d When Δf<0, the hybrid energy storage system needs to compensate for the fluctuating power of wind power and needs to cope with the frequency fluctuation of the power grid. ΔP>0, indicating that the predicted wind power value is higher than the actual output, and the wind power is insufficient, |Δf|>f d , indicating that the grid frequency deviation exceeds the frequency deviation threshold, the frequency deviation is large, Δf<0, indicating that the frequency deviation is negative, indicating that the grid frequency is lower than the rated value. At this time, the energy storage system needs to provide additional power to make up for the wind power gap. In addition, the grid frequency is low at this time, and the energy storage system needs to reduce the injection into the grid to help increase the frequency.

[0120] In the formula, P HESS-O is the power of the hybrid energy storage system participating in the primary frequency regulation at the current moment, without considering the fluctuation of wind power. By subtracting ΔP, the energy storage system additionally compensates for the power gap caused by insufficient wind power, -P HESS-N The present invention can calculate the energy storage system to reduce the frequency regulation demand P according to the grid frequency deviation Δf. HESS-N , reflecting the response of energy storage to grid frequency fluctuations.

[0121] In one embodiment of the present invention, the power P of the hybrid energy storage system participating in the primary frequency regulation after compensation is determined according to the wind power fluctuation value ΔP in the above step S104. HESS-w ,include:

[0122] When ΔP>0, |Δf|<f d When the power P of the compensated hybrid energy storage system participating in the primary frequency regulation is determined HESS-w for:

[0123] P HESS-w =P HESS-O -ΔP

[0124] Where Δf is the frequency deviation, f d is the frequency deviation threshold, P HESS-O It is the power of the hybrid energy storage system participating in primary frequency regulation at the current moment.

[0125] In the present invention, when ΔP>0, and |Δf|<f d When ΔP>0, it means that the predicted wind power is higher than the actual output, and the wind power is insufficient. d , indicating that the grid frequency deviation does not exceed the frequency deviation threshold, and the frequency change is small. At this time, the energy storage system is mainly used to compensate for the wind power gap and does not need to significantly participate in frequency regulation.

[0126] In the formula, P HESS-O It is the power of the hybrid energy storage system participating in primary frequency regulation at the current moment, without considering the fluctuation of wind power. By subtracting ΔP, the energy storage system additionally compensates for the power gap caused by insufficient wind power.

[0127] In one embodiment of the present invention, the power P of the hybrid energy storage system participating in the primary frequency regulation after compensation is determined according to the wind power fluctuation value ΔP in the above step S104. HESS-w ,include:

[0128] When ΔP<0, |Δf|>f d , when Δf>0, determine the power P of the compensated hybrid energy storage system participating in the primary frequency regulation HESS-w for:

[0129] P HESS-w =P HESS-O +ΔP-P HESS-N

[0130] Where Δf is the frequency deviation, f d is the frequency deviation threshold, P HESS-Ois the power of the hybrid energy storage system participating in primary frequency regulation at the current moment, P HESS-N The power increment for the hybrid energy storage system to participate in primary frequency regulation to cope with grid frequency fluctuations.

[0131] In the present invention, when ΔP<0, and |Δf|>f d , when Δf>0, the hybrid energy storage system needs to compensate for the fluctuating power of wind power and needs to cope with the frequency fluctuation of the power grid. ΔP<0, indicating that the predicted wind power value is lower than the actual output, and the wind power is over-generated, |Δf|>f d , indicating that the grid frequency deviation exceeds the frequency deviation threshold, the frequency deviation is large, Δf>0, indicating that the frequency deviation is positive, indicating that the grid frequency is higher than the rated value. At this time, the energy storage system needs to absorb the excess power of wind power and participate in the regulation of the grid frequency to help reduce the frequency deviation.

[0132] In the formula, P HESS-O is the power of the hybrid energy storage system participating in the primary frequency regulation at the current moment, without considering the fluctuation of wind power. By adding ΔP (ΔP is a negative value at this time), the energy storage system reduces the output power to adapt to the power demand of the power grid, -P HESS-N Indicates the reduction of frequency regulation power. The present invention can calculate the energy storage system to reduce the frequency regulation demand P according to the grid frequency deviation Δf. HESS-N , reflecting the response of energy storage to grid frequency fluctuations.

[0133] In one embodiment of the present invention, the power P of the hybrid energy storage system participating in the primary frequency regulation after compensation is determined according to the wind power fluctuation value ΔP in the above step S104. HESS-w ,include:

[0134] When ΔP<0, |Δf|>f d , when Δf<0, determine the power P of the compensated hybrid energy storage system participating in the primary frequency regulation HESS-w for:

[0135] P HESS-w =P HESS-O +ΔP+P HESS-N

[0136] Where Δf is the frequency deviation, f d is the frequency deviation threshold, P HESS-O is the power of the hybrid energy storage system participating in primary frequency regulation at the current moment, P HESS-N The power increment for the hybrid energy storage system to participate in primary frequency regulation to cope with grid frequency fluctuations.

[0137] In the present invention, when ΔP<0, and |Δf|>f d, when Δf<0, the hybrid energy storage system needs to compensate for the fluctuating power of wind power and needs to cope with the frequency fluctuation of the power grid. ΔP<0, indicating that the predicted wind power value is lower than the actual output, and the wind power is over-generated, |Δf|>f d , indicating that the grid frequency deviation exceeds the frequency deviation threshold, the frequency deviation is large, Δf<0, indicating that the frequency deviation is negative, indicating that the grid frequency is lower than the rated value. At this time, the energy storage system needs to absorb the power generated by wind power. In addition, the grid frequency is low at this time, and the energy storage system needs to provide additional power to increase the grid frequency.

[0138] In the formula, P HESS-O It is the power of the hybrid energy storage system participating in the primary frequency regulation at the current moment, without considering the fluctuation of wind power. By adding ΔP (ΔP is a negative value at this time), the energy storage system reduces the output power to adapt to the power demand of the power grid, +P HESS-N Indicates the newly added frequency regulation power.

[0139] In one embodiment of the present invention, the power P of the hybrid energy storage system participating in the primary frequency regulation after compensation is determined according to the wind power fluctuation value ΔP in the above step S104. HESS-w ,include:

[0140] When ΔP<0, |Δf|<f d When the power P of the compensated hybrid energy storage system participating in the primary frequency regulation is determined HESS-w for:

[0141] P HESS-w =P HESS-O +ΔP

[0142] Where Δf is the frequency deviation, f d is the frequency deviation threshold, P HESS-O It is the power of the hybrid energy storage system participating in primary frequency regulation at the current moment.

[0143] In the present invention, when ΔP<0, and |Δf|<f d When , the hybrid energy storage system needs to compensate for the fluctuating power of wind power, but does not need to deal with the fluctuation of grid frequency. ΔP<0, indicating that the predicted wind power value is lower than the actual output, and the wind power is over-generated, |Δf|<f d , indicating that the grid frequency deviation does not exceed the frequency deviation threshold, and the frequency change is small. At this time, the energy storage system needs to absorb the excess power of wind power and does not need to significantly participate in frequency regulation.

[0144] In the formula, P HESS-O It is the power of the hybrid energy storage system participating in the primary frequency regulation at the current moment, without considering the fluctuation of wind power. By adding ΔP (ΔP is a negative value at this time), the energy storage system reduces the output power to adapt to the power demand of the power grid.

[0145] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0146] Based on the same inventive concept, an embodiment of the present invention also provides a hybrid energy storage assisted wind power primary frequency regulation control device, which can be used to implement the hybrid energy storage assisted wind power primary frequency regulation control method described in the above embodiment, as described in the following embodiment. Since the principle of solving the problem by the hybrid energy storage assisted wind power primary frequency regulation control device is similar to that of the hybrid energy storage assisted wind power primary frequency regulation control method, the embodiment of the hybrid energy storage assisted wind power primary frequency regulation control device can refer to the embodiment of the hybrid energy storage assisted wind power primary frequency regulation control method, and the repeated parts will not be repeated. As used below, the terms "unit" or "module" can be a combination of software and / or hardware that implements predetermined functions. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceived.

[0147] Figure 7 : is a structural block diagram of a hybrid energy storage assisted wind power primary frequency regulation control device according to an embodiment of the present invention. Figure 7 As shown, in one embodiment of the present invention, the hybrid energy storage assisted wind power primary frequency regulation control device of the present invention includes:

[0148] The current wind turbine primary frequency modulation power determination unit 1 is used to determine the current wind power primary frequency modulation power P N Decompose it to get the fan primary frequency modulation power P at the current moment wind ;

[0149] The wind turbine primary frequency modulation power determination unit 2 at the future time is used to obtain the wind power primary frequency modulation power prediction value P at the future time F , according to the predicted value of wind power primary frequency regulation power P at the future moment F Calculate the primary frequency modulation power P of the fan at the future moment pre ;

[0150] The wind power fluctuation value determination unit 3 is used to determine the wind turbine primary frequency modulation power P at a future time. pre and the fan primary frequency modulation power P at the current moment wind , the wind power fluctuation value ΔP is calculated;

[0151] The hybrid energy storage system primary frequency regulation control unit 4 is used to determine the power P of the hybrid energy storage system participating in the primary frequency regulation after compensation according to the wind power fluctuation value ΔP. HESS-w , so that the hybrid energy storage system participates in the primary frequency modulation power P according to the compensated hybrid energy storage systemHESS-w Perform a frequency modulation.

[0152] In one embodiment of the present invention, the hybrid energy storage assisted wind power primary frequency regulation control device of the present invention further includes:

[0153] The frequency deviation filtering processing unit is used to perform a first-order high-pass filtering process on the frequency deviation Δf to obtain a high-frequency signal Δf H and low frequency signal Δf L ;

[0154] A high-frequency signal decomposition unit is used to decompose the high-frequency signal Δf using the ICEEMDAN method. H Decomposed into high frequency components Δf H-H and low frequency component Δf H-L .

[0155] In one embodiment of the present invention, the primary frequency regulation control unit of the hybrid energy storage system includes:

[0156] The primary frequency modulation control module of the flywheel energy storage system is used to adjust the frequency of the flywheel energy storage system in the hybrid energy storage system according to the high frequency component Δf H-H And the power P of the compensated hybrid energy storage system participating in primary frequency regulation HESS-w Perform a frequency modulation;

[0157] The primary frequency modulation control module of the lithium battery energy storage system is used to adjust the frequency of the lithium battery energy storage system in the hybrid energy storage system according to the low frequency component Δf H-L And the power P of the compensated hybrid energy storage system participating in primary frequency regulation HESS-w Perform a frequency modulation.

[0158] In one embodiment of the present invention, the hybrid energy storage assisted wind power primary frequency regulation control device of the present invention further includes:

[0159] The primary frequency regulation control unit of the wind turbine is used to adjust the wind turbine based on the low-frequency signal Δf L Perform a frequency modulation.

[0160] In one embodiment of the present invention, the primary frequency regulation control unit 4 of the hybrid energy storage system includes:

[0161] The control module is used to make the hybrid energy storage system perform frequency modulation once only by considering the grid frequency fluctuation when the wind power fluctuation value ΔP is equal to 0.

[0162] In one embodiment of the present invention, the primary frequency regulation control unit 4 of the hybrid energy storage system includes:

[0163] The first power determination module is used when ΔP>0, |Δf|>f d, when Δf>0, determine the power P of the compensated hybrid energy storage system participating in the primary frequency regulation HESS-w for:

[0164] P HESS-w =P HESS-O -ΔP+P HESS-N

[0165] Where Δf is the frequency deviation, f d is the frequency deviation threshold, P HESS-O is the power of the hybrid energy storage system participating in primary frequency regulation at the current moment, P HESS-N The power increment for the hybrid energy storage system to participate in primary frequency regulation to cope with grid frequency fluctuations.

[0166] In one embodiment of the present invention, the primary frequency regulation control unit 4 of the hybrid energy storage system includes:

[0167] The second power determination module is used when ΔP>0, |Δf|>f d , when Δf<0, determine the power P of the compensated hybrid energy storage system participating in the primary frequency regulation HESS-w for:

[0168] P HESS-w =PH ESS-O -ΔP-P HESS-N

[0169] Where Δf is the frequency deviation, f d is the frequency deviation threshold, P HESS-O is the power of the hybrid energy storage system participating in primary frequency regulation at the current moment, P HESS-N The power increment for the hybrid energy storage system to participate in primary frequency regulation to cope with grid frequency fluctuations.

[0170] In one embodiment of the present invention, the primary frequency regulation control unit 4 of the hybrid energy storage system includes:

[0171] The third power determination module is used when ΔP>0, |Δf|<f d When the power P of the compensated hybrid energy storage system participating in the primary frequency regulation is determined HESS-w for:

[0172] P HESS-w =P HESS-O -ΔP

[0173] Where Δf is the frequency deviation, f d is the frequency deviation threshold, P HESS-O It is the power of the hybrid energy storage system participating in primary frequency regulation at the current moment.

[0174] In one embodiment of the present invention, the primary frequency regulation control unit 4 of the hybrid energy storage system includes:

[0175] The fourth power determination module is used when ΔP<0, |Δf|>f d , when Δf>0, determine the power P of the compensated hybrid energy storage system participating in the primary frequency regulation HESS-w for:

[0176] P HESS-w =P HESS-O +ΔP-P HESS-N

[0177] Where Δf is the frequency deviation, f d is the frequency deviation threshold, P HESS-O is the power of the hybrid energy storage system participating in primary frequency regulation at the current moment, P HESS-N The power increment for the hybrid energy storage system to participate in primary frequency regulation to cope with grid frequency fluctuations.

[0178] In one embodiment of the present invention, the primary frequency regulation control unit 4 of the hybrid energy storage system includes:

[0179] The fifth power determination module is used when ΔP<0, |Δf|>f d , when Δf<0, determine the power P of the compensated hybrid energy storage system participating in the primary frequency regulation HESS-w for:

[0180] P HESS-w =P HESS-O +ΔP+P HESS-N

[0181] Where Δf is the frequency deviation, f d is the frequency deviation threshold, P HESS-O is the power of the hybrid energy storage system participating in primary frequency regulation at the current moment, P HESS-N The power increment for the hybrid energy storage system to participate in primary frequency regulation to cope with grid frequency fluctuations.

[0182] In one embodiment of the present invention, the primary frequency regulation control unit 4 of the hybrid energy storage system includes:

[0183] The sixth power determination module is used for when ΔP<0, |Δf|<f d When the power P of the compensated hybrid energy storage system participating in the primary frequency regulation is determined HESS-w for:

[0184] P HESS - w =P HESS-O +ΔP

[0185] Where Δf is the frequency deviation, f d is the frequency deviation threshold, P HESS-OIt is the power of the hybrid energy storage system participating in primary frequency regulation at the current moment.

[0186] In order to achieve the above object, according to another aspect of the present application, a computer device is also provided. Figure 8 As shown, the computer device includes a memory, a processor, a communication interface and a communication bus. A computer program that can be executed on the processor is stored in the memory. When the processor executes the computer program, the steps in the above-mentioned embodiment method are implemented.

[0187] The processor may be a central processing unit (CPU). The processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or a combination of the above chips.

[0188] The memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs, non-transitory computer executable programs and units, such as the corresponding program units in the above method embodiments of the present invention. The processor executes various functional applications of the processor and works data processing by running the non-transitory software programs, instructions and modules stored in the memory, that is, implementing the method in the above method embodiments.

[0189] The memory may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created by the processor, etc. In addition, the memory may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory may optionally include a memory remotely arranged relative to the processor, and these remote memories may be connected to the processor via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0190] The one or more units are stored in the memory, and when executed by the processor, the method in the above embodiment is performed.

[0191] The specific details of the above-mentioned computer device can be understood by referring to the corresponding related descriptions and effects in the above-mentioned embodiments, and will not be repeated here.

[0192] In order to achieve the above purpose, according to another aspect of the present application, a computer-readable storage medium is also provided, wherein the computer-readable storage medium stores a computer program, and the computer program implements the steps in the above hybrid energy storage assisted wind power primary frequency regulation control method when executed in a computer processor. Those skilled in the art can understand that the implementation of all or part of the processes in the above embodiment method can be completed by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and the program can include the processes of the embodiments of the above methods when executed. Among them, the storage medium can be a disk, an optical disk, a read-only memory (ROM), a random access memory (RAM), a flash memory (Flash Memory), a hard disk (Hard Disk Drive, abbreviated as: HDD) or a solid-state drive (SSD), etc.; the storage medium can also include a combination of the above types of memories.

[0193] In order to achieve the above-mentioned purpose, according to another aspect of the present application, a computer program product is also provided, including a computer program / instruction, which, when executed by a processor, implements the steps of the above-mentioned hybrid energy storage-assisted wind power primary frequency regulation control method.

[0194] Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, and optionally, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

[0195] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hybrid energy storage assisted wind power primary frequency modulation control method, characterized in that: include: The wind power primary frequency modulation power P at the current moment N Decompose it to get the fan primary frequency modulation power P at the current moment wind ; Get the predicted value P of wind power primary frequency regulation power at the future moment F , according to the predicted value of wind power primary frequency regulation power P at the future moment F Calculate the primary frequency modulation power P of the fan at the future moment pre ; According to the fan primary frequency modulation power P at the future moment pre and the fan primary frequency modulation power P at the current moment wind , the wind power fluctuation value ΔP is calculated; According to the wind power fluctuation value ΔP, the power P of the hybrid energy storage system participating in the primary frequency regulation after compensation is determined HESS-w , so that the hybrid energy storage system participates in the primary frequency modulation power P according to the compensated hybrid energy storage system HESS-w Perform a frequency modulation.

2. The hybrid energy storage assisted wind power primary frequency regulation control method according to claim 1 is characterized in that: Also includes: Perform a first-order high-pass filter on the frequency deviation Δf to obtain a high-frequency signal Δf H and low frequency signal Δf L ; The high frequency signal Δf is transformed into H Decomposed into high frequency components Δf H-H and low frequency component Δf H-L ; The hybrid energy storage system is made to participate in the primary frequency modulation according to the power P of the compensated hybrid energy storage system. HESS-w Perform a frequency tuning, including: The flywheel energy storage system in the hybrid energy storage system is made to H-H And the power P of the compensated hybrid energy storage system participating in primary frequency regulation HESS-w Perform a frequency modulation; The lithium battery energy storage system in the hybrid energy storage system is made to H-L And the power P of the compensated hybrid energy storage system participating in primary frequency regulation HESS-w Perform a frequency modulation.

3. The hybrid energy storage assisted wind power primary frequency regulation control method according to claim 2 is characterized in that: Also includes: The wind turbine is based on the low-frequency signal Δf L Perform a frequency modulation.

4. The hybrid energy storage assisted wind power primary frequency regulation control method according to claim 1 is characterized in that: According to the wind power fluctuation value ΔP, the power P of the hybrid energy storage system participating in the primary frequency regulation after compensation is determined. HESS-w , so that the hybrid energy storage system participates in the primary frequency modulation power P according to the compensated hybrid energy storage system HESS-w Perform a frequency tuning, including: When the wind power fluctuation value ΔP is equal to 0, the hybrid energy storage system only considers the grid frequency fluctuation to perform frequency regulation once.

5. The hybrid energy storage assisted wind power primary frequency regulation control method according to claim 1, characterized in that: According to the wind power fluctuation value ΔP, the power P of the hybrid energy storage system participating in the primary frequency regulation after compensation is determined. HESS-w ,include: When ΔP>0, |Δf|>f d , when Δf>0, determine the power P of the compensated hybrid energy storage system participating in the primary frequency regulation HESS-w for: P HESS-w =P HESS-O -ΔP+P HESS-N Where Δf is the frequency deviation, f d is the frequency deviation threshold, P HESS-O is the power of the hybrid energy storage system participating in primary frequency regulation at the current moment, P HESS-N The power increment for the hybrid energy storage system to participate in primary frequency regulation to cope with grid frequency fluctuations.

6. The hybrid energy storage assisted wind power primary frequency regulation control method according to claim 1, characterized in that: According to the wind power fluctuation value ΔP, the power P of the hybrid energy storage system participating in the primary frequency regulation after compensation is determined. HESS-w ,include: When ΔP>0, |Δf|>f d , when Δf<0, determine the power P of the compensated hybrid energy storage system participating in the primary frequency regulation HESS-w for: P HESS-w =P HESS-O -ΔP-P HESS-N Where Δf is the frequency deviation, f d is the frequency deviation threshold, P HESS-O is the power of the hybrid energy storage system participating in primary frequency regulation at the current moment, P HESS-N The power increment for the hybrid energy storage system to participate in primary frequency regulation to cope with grid frequency fluctuations.

7. The hybrid energy storage assisted wind power primary frequency regulation control method according to claim 1, characterized in that: According to the wind power fluctuation value ΔP, the power P of the hybrid energy storage system participating in the primary frequency regulation after compensation is determined. HESS-w ,include: When ΔP>0, |Δf| <f d When the power P of the compensated hybrid energy storage system participating in the primary frequency regulation is determined HESS-w for: P HESS-w =P HESS-O -ΔP Where Δf is the frequency deviation, f d is the frequency deviation threshold, P HESS-O It is the power of the hybrid energy storage system participating in primary frequency regulation at the current moment.

8. The hybrid energy storage assisted wind power primary frequency regulation control method according to claim 1, characterized in that: According to the wind power fluctuation value ΔP, the power P of the hybrid energy storage system participating in the primary frequency regulation after compensation is determined. HESS-w ,include: When ΔP<0, |Δf|>f d , when Δf>0, determine the power P of the compensated hybrid energy storage system participating in the primary frequency regulation HESS-w for: P HESS-w =P HESS-O +ΔP-P HESS-N Where Δf is the frequency deviation, f d is the frequency deviation threshold, P HESS-O is the power of the hybrid energy storage system participating in primary frequency regulation at the current moment, P HESS-N The power increment for the hybrid energy storage system to participate in primary frequency regulation to cope with grid frequency fluctuations.

9. The hybrid energy storage assisted wind power primary frequency regulation control method according to claim 1, characterized in that: According to the wind power fluctuation value ΔP, the power P of the hybrid energy storage system participating in the primary frequency regulation after compensation is determined. HESS-w ,include: When ΔP<0, |Δf|>f d , when Δf<0, determine the power P of the compensated hybrid energy storage system participating in the primary frequency regulation HESS-w for: P HESS-w =P HESS-O +ΔP+P HESS-N Where Δf is the frequency deviation, f d is the frequency deviation threshold, P HESS-O is the power of the hybrid energy storage system participating in primary frequency regulation at the current moment, P HESS-N The power increment for the hybrid energy storage system to participate in primary frequency regulation to cope with grid frequency fluctuations.

10. The hybrid energy storage assisted wind power primary frequency regulation control method according to claim 1, characterized in that: According to the wind power fluctuation value ΔP, the power P of the hybrid energy storage system participating in the primary frequency regulation after compensation is determined. HESS-w ,include: When ΔP<0, |Δf| <f d When the power P of the compensated hybrid energy storage system participating in the primary frequency regulation is determined HESS-w for: P HESS-w =P HESS-O +ΔP Where Δf is the frequency deviation, f d is the frequency deviation threshold, P HESS-O It is the power of the hybrid energy storage system participating in primary frequency regulation at the current moment.

11. A hybrid energy storage assisted wind power primary frequency regulation control device, characterized in that: include: The wind turbine primary frequency modulation power determination unit at the current moment is used to determine the wind power primary frequency modulation power P at the current moment. N Decompose it to get the fan primary frequency modulation power P at the current moment wind ; The wind turbine primary frequency regulation power determination unit at the future time is used to obtain the predicted value P of wind power primary frequency regulation power at the future time. F , according to the predicted value of wind power primary frequency regulation power P at the future moment F Calculate the primary frequency modulation power P of the fan at the future moment pre ; The wind power fluctuation value determination unit is used to determine the wind turbine primary frequency modulation power P at a future time. pre and the fan primary frequency modulation power P at the current moment wind , the wind power fluctuation value ΔP is calculated; The primary frequency regulation control unit of the hybrid energy storage system is used to determine the power P of the hybrid energy storage system participating in the primary frequency regulation after compensation according to the wind power fluctuation value ΔP. HESS-w , so that the hybrid energy storage system participates in the primary frequency modulation power P according to the compensated hybrid energy storage system HESS-w Perform a frequency modulation.

12. The hybrid energy storage assisted wind power primary frequency regulation control device according to claim 11, characterized in that: Also includes: The frequency deviation filtering processing unit is used to perform a first-order high-pass filtering process on the frequency deviation Δf to obtain a high-frequency signal Δf H and low frequency signal Δf L ; A high-frequency signal decomposition unit is used to decompose the high-frequency signal Δf using the ICEEMDAN method. H Decomposed into high frequency components Δf H-H and low frequency component Δf H-L ; The primary frequency regulation control unit of the hybrid energy storage system comprises: The primary frequency modulation control module of the flywheel energy storage system is used to adjust the frequency of the flywheel energy storage system in the hybrid energy storage system according to the high frequency component Δf H-H And the power P of the compensated hybrid energy storage system participating in primary frequency regulation HESS-w Perform a frequency modulation; The primary frequency modulation control module of the lithium battery energy storage system is used to adjust the frequency of the lithium battery energy storage system in the hybrid energy storage system according to the low frequency component Δf H-L And the power P of the compensated hybrid energy storage system participating in primary frequency regulation HESS-w Perform a frequency modulation.

13. A computer 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 computer program, the steps of the method according to any one of claims 1 to 10 are implemented.

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

15. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 1 to 10 are implemented.

Images