Primary frequency modulation instruction calculation method and system considering wind and light fluctuation in frequency modulation process, electronic equipment and medium

Abstract

The invention provides a primary frequency modulation instruction calculation method and system considering wind and light fluctuation in a frequency modulation process, electronic equipment and a medium, and belongs to the technical field of power system frequency stability control, and the method comprises the following steps: S1, building a control architecture for a wind and light energy storage new energy station and a primary frequency modulation instruction calculation method; s2, establishing a primary frequency modulation instruction calculation method considering wind and light fluctuation in the frequency modulation process; and S3, carrying out dynamic response modeling on wind power, photovoltaic and energy storage modules, converting into a discretization model in a time domain according to a finite difference method, and combining with the primary frequency modulation instruction calculation method in the step S2 to obtain grid-connected point power response considering wind and light fluctuation in the frequency modulation process. The method can achieve the expected effect of the power response of the grid-connected point under different wind and light resources, helps the new energy station to effectively deal with the power vacancy in a power system under various wind and light scenes, and improves the frequency supporting capability of the new energy station.

Description

Technical Field

[0001] The present invention relates to the technical field of power system frequency stability control, and in particular to a method, system, electronic equipment and medium for calculating a primary frequency modulation instruction taking into account wind and solar power fluctuations during the frequency modulation process. Background Art

[0002] For new energy sites including wind power, photovoltaics and energy storage, their power increment when facing frequency disturbances is usually calculated according to the primary frequency regulation method of traditional synchronous units, ignoring the wind and solar fluctuations in the frequency regulation process. As a result, the actual power increment at the grid-connected point cannot achieve the expected effect. Therefore, the frequency regulation instruction generation method considering the wind and solar fluctuations in the frequency regulation process is still worth studying.

[0003] Therefore, it is necessary to provide a method, system, electronic device and medium for calculating a primary frequency modulation instruction that takes into account the fluctuations of wind and solar power during the frequency modulation process to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a method, system, electronic device and medium for calculating a primary frequency modulation instruction taking into account the fluctuations of wind and solar power during the frequency modulation process, which can achieve the expected power response of the grid connection point under different wind and solar power resources, help new energy stations to effectively deal with the power shortage in the power system under various wind and solar power scenarios, and improve the frequency support capability of new energy stations.

[0005] To achieve the above object, the present invention provides a method for calculating a frequency modulation instruction taking into account wind and solar power fluctuations during frequency modulation, comprising the following steps:

[0006] Step S1, establishing a control architecture and a primary frequency modulation command calculation method for a wind, solar, energy storage and new energy station;

[0007] Step S2, establishing a frequency modulation instruction calculation method that takes into account wind and solar fluctuations during the frequency modulation process;

[0008] Step S3, dynamically model the wind power, photovoltaic, and energy storage modules, and convert them into discrete models in the time domain according to the finite difference method. Combined with the primary frequency modulation command calculation method in step S2, the power response of the grid connection point taking into account the wind and solar fluctuations during the frequency modulation process is obtained.

[0009] Preferably, in step S1, the control architecture of the wind, solar, energy storage new energy station is that the wind, solar, energy storage new energy station calculates the total theoretical power increment of the wind, solar, energy storage new energy station according to the measured frequency change of the grid connection point, and combines the initial AGC instruction of the wind, solar, energy storage new energy station to send a frequency modulation instruction to the wind power, photovoltaic and energy storage modules.

[0010] Preferably, in step S1, a frequency modulation instruction is calculated as follows:

[0011]

[0012] in, is the total theoretical power increment of the wind, solar and storage new energy station; K is the primary frequency regulation droop coefficient of the wind, solar and storage new energy station; Δf is the frequency change of the wind, solar and storage new energy station grid connection point; R ∑ It is the total power adjustable margin of wind, solar and energy storage new energy stations; The total power command for wind, solar and storage renewable energy stations taking into account the power increment; It is the initial AGC instruction for wind, solar and storage new energy stations;

[0013] According to the primary frequency regulation command allocation logic of the wind, solar and energy storage new energy station, the total power command of the wind, solar and energy storage new energy station taking into account the power increment is allocated to the wind power, photovoltaic and energy storage modules:

[0014]

[0015] in, They are the total power instructions allocated to the energy storage, photovoltaic, and wind power modules respectively.

[0016] Preferably, allocating the total power command of the wind, photovoltaic and energy storage new energy station taking into account the power increment to the wind power, photovoltaic and energy storage modules includes three allocation situations:

[0017] Distribution Situation 1:

[0018] When the adjustable margin of energy storage power is sufficient, the total theoretical power increment of the wind, solar and energy storage new energy station is fully responded by the energy storage module, and the total power instruction of the energy storage module is:

[0019]

[0020] in, Initial AGC instruction for the energy storage module;

[0021] Allocation Scenario 2:

[0022] When the adjustable margin of energy storage power is insufficient and the adjustable margin of photovoltaic power is sufficient, the total theoretical power increment of the wind, solar and energy storage new energy station is fully responded by the energy storage module and the photovoltaic module. The total power instructions of the energy storage module and the photovoltaic module are:

[0023]

[0024] Among them, R bess It is the adjustable margin of energy storage power; Initial AGC instruction for the photovoltaic module;

[0025] Allocation situation three:

[0026] When the adjustable margin of energy storage power and photovoltaic power is insufficient, the total theoretical power increment of the wind-solar-storage new energy station is jointly responded by the energy storage module, photovoltaic module and wind power module. The total power instructions of the energy storage module, photovoltaic module and wind power module are respectively:

[0027]

[0028] Among them, R pv is the photovoltaic power adjustable margin; P is the initial AGC instruction of the wind power module; windmax The maximum wind power that can be generated.

[0029] Preferably, in step S2, a frequency modulation instruction calculation is performed taking into account the wind-solar power fluctuation during the frequency modulation process, and the total power instruction is completely determined by the frequency change and the wind-solar power fluctuation:

[0030]

[0031] Where ΔP pv,t , ΔP wind,t are the changes of photovoltaic and wind power relative to the initial AGC command power at time t;

[0032] When the adjustable margin of energy storage power responds to the theoretical increment of total power but does not fully respond to the fluctuation of wind and solar power, the total power instruction of the energy storage module is:

[0033]

[0034] Preferably, in step S3, dynamic response modeling is performed on wind power, photovoltaic, and energy storage modules, and the specific operations are as follows:

[0035]

[0036] in, are the response powers of energy storage, photovoltaic and wind power modules respectively; T bess , T pv , T wind are the response time constants of energy storage, photovoltaic and wind power modules respectively.

[0037] Preferably, in step S3, the finite difference method is converted into a discretized model in the time domain, and combined with a primary frequency modulation instruction method, the power response of the grid connection point taking into account the wind and solar fluctuations in the frequency modulation process is obtained. The specific operations are as follows:

[0038]

[0039] in, are the response powers of energy storage, photovoltaic and wind power modules at time tn respectively; are the response powers of energy storage, photovoltaic and wind power modules at time tn-1 respectively; are the frequency modulation instructions for energy storage, photovoltaic and wind power modules at time tn-1 considering the wind and solar fluctuations; dn is the differential step size; is the grid-connected point power response.

[0040] A primary frequency modulation instruction calculation system considering wind and solar power fluctuations during frequency modulation, comprising:

[0041] A primary frequency modulation grid-connected point frequency modulation total instruction generation module is used to generate a total theoretical power instruction increment and a total frequency modulation instruction of the grid-connected point according to the frequency change;

[0042] The energy storage, photovoltaic and wind power primary frequency regulation instruction allocation module is used to allocate the total frequency regulation instruction of the grid connection point to the energy storage, photovoltaic and wind power modules according to the adjustable power margin of each power source. When the adjustable power margin of the energy storage is sufficient, the new energy storage, photovoltaic and wind power primary frequency regulation instructions are calculated taking into account the fluctuation of wind and solar power.

[0043] The power response module is used to model the dynamic response of wind power, photovoltaic and energy storage modules, and convert them into discrete models in the time domain according to the finite difference method. It responds according to the calculated primary frequency modulation instructions of each power source to obtain the power response of the grid connection point.

[0044] A computer device comprises: a memory and a processor; the memory stores a computer program, and when the processor executes the computer program, the steps of the method for calculating a frequency modulation instruction taking into account the wind and solar power fluctuations in the frequency modulation process are implemented.

[0045] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the method for calculating a frequency modulation instruction taking into account wind and solar power fluctuations during the frequency modulation process.

[0046] Therefore, the present invention adopts the above-mentioned method, system, electronic device and medium for calculating a frequency modulation instruction taking into account the wind and solar fluctuations during the frequency modulation process, and the beneficial technical effects are as follows:

[0047] (1) It can effectively deal with the uncertainty of wind and solar power in the frequency modulation process;

[0048] (2) Improve the output stability and accuracy of wind, solar and energy storage stations, and enhance the frequency support capabilities of new energy stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a schematic diagram of the control architecture, instruction allocation and response object of the present invention;

[0050] Figure 2 This is a measured power diagram of each power source of a new energy station when the frequency modulation instruction does not take into account the fluctuation of wind and solar power; among them, Figure 2 (a) is the actual wind power measurement diagram during a frequency regulation process; Figure 2 (b) is the measured PV power during a frequency modulation process; Figure 2 (c) is the actual measurement diagram of energy storage power during a frequency modulation process; Figure 2 (d) is the actual power measurement diagram of the grid connection point during the primary frequency modulation process;

[0051] Figure 3 It is a comparison diagram of energy storage power response under the boundary conditions of Example 1;

[0052] Figure 4 It is a comparison diagram of the power response of the grid connection point under the boundary conditions of the first embodiment;

[0053] Figure 5 It is a comparison diagram of frequency variation under the boundary conditions of the first embodiment;

[0054] Figure 6 It is a comparison diagram of energy storage power response under the boundary conditions of Example 1;

[0055] Figure 7 It is a structural schematic diagram of a primary frequency modulation instruction calculation system of the present invention that takes into account wind and solar power fluctuations during the frequency modulation process. DETAILED DESCRIPTION

[0056] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0057] Unless otherwise defined, technical or scientific terms used in the present invention shall have the common meanings understood by one having ordinary skills in the field to which the present invention belongs.

[0058] Embodiment 1

[0059] The present invention provides a method for calculating a frequency modulation instruction taking into account wind and solar power fluctuations during a frequency modulation process, comprising the following steps:

[0060] Step S1, establishing a control architecture and a primary frequency modulation command calculation method for a wind, solar, energy storage and new energy station;

[0061] like Figure 1 As shown in the figure, the control architecture of the wind, solar, energy storage new energy station is that the wind, solar, energy storage new energy station calculates the total theoretical power increment of the wind, solar, energy storage new energy station according to the measured frequency change of the grid connection point, and combines the initial AGC command of the wind, solar, energy storage new energy station to send a frequency modulation command to the wind power, photovoltaic and energy storage modules.

[0062] The calculation method of a frequency modulation instruction is as follows, ignoring the influence of the frequency modulation dead zone on this method:

[0063]

[0064] in, is the total theoretical power increment of the wind, solar, and storage new energy station; K is the primary frequency regulation droop coefficient of the wind, solar, and storage new energy station; Δf is the frequency change of the wind, solar, and storage new energy station at the grid connection point; R∑ is the total power adjustable margin of the wind, solar, and storage new energy station; The total power command for wind, solar and storage renewable energy stations taking into account the power increment; It is the initial AGC instruction for wind, solar and storage new energy stations;

[0065] According to the primary frequency regulation command allocation logic of the wind, solar and energy storage new energy station, the total power command of the wind, solar and energy storage new energy station taking into account the power increment is allocated to the wind power, photovoltaic and energy storage modules:

[0066]

[0067] in, They are the total power instructions allocated to the energy storage, photovoltaic, and wind power modules respectively.

[0068] There are three allocation scenarios for allocating the total power command of the wind, solar and energy storage new energy station taking into account the power increment to wind power, photovoltaic and energy storage modules:

[0069] Distribution Situation 1:

[0070] When the adjustable margin of energy storage power is sufficient, the total theoretical power increment of the wind, solar and energy storage new energy station is fully responded by the energy storage module, and the total power instruction of the energy storage module is:

[0071]

[0072] in, Initial AGC instruction for the energy storage module;

[0073] Allocation Scenario 2:

[0074] When the adjustable margin of energy storage power is insufficient and the adjustable margin of photovoltaic power is sufficient, the total theoretical power increment of the wind, solar and energy storage new energy station is fully responded by the energy storage module and the photovoltaic module. The total power instructions of the energy storage module and the photovoltaic module are:

[0075]

[0076]

[0077] Among them, R bess It is the adjustable margin of energy storage power; Initial AGC instruction for the photovoltaic module;

[0078] Allocation situation three:

[0079] When the adjustable margin of energy storage power and photovoltaic power is insufficient, the total theoretical power increment of the wind-solar-storage new energy station is jointly responded by the energy storage module, photovoltaic module and wind power module. The total power instructions of the energy storage module, photovoltaic module and wind power module are respectively:

[0080]

[0081] Among them, R pv is the photovoltaic power adjustable margin; P is the initial AGC instruction of the wind power module; windmax The maximum wind power that can be generated.

[0082] Step S2, establishing a frequency modulation instruction calculation method that takes into account wind and solar fluctuations during the frequency modulation process;

[0083] The total power command is completely determined by the frequency change and the wind and solar power fluctuation:

[0084]

[0085] Where ΔP pv,t , ΔP wind,t are the changes of photovoltaic and wind power relative to the initial AGC command power at time t;

[0086] When the adjustable margin of energy storage power responds to the theoretical increment of total power but does not fully respond to the fluctuation of wind and solar power, the total power instruction of the energy storage module is:

[0087]

[0088] Step S3, dynamically model the wind power, photovoltaic, and energy storage modules, and convert them into discrete models in the time domain according to the finite difference method. Combined with the primary frequency modulation command calculation method in step S2, the power response of the grid connection point taking into account the wind and solar fluctuations during the frequency modulation process is obtained.

[0089] Dynamic response modeling of wind power, photovoltaic and energy storage modules is carried out. The specific operations are as follows:

[0090]

[0091] in, are the response powers of energy storage, photovoltaic and wind power modules respectively; T bess , T pv , T wind are the response time constants of energy storage, photovoltaic and wind power modules respectively.

[0092] According to the finite difference method, it is converted into a discretized model in the time domain. Combined with the primary frequency modulation command method, the power response of the grid connection point taking into account the wind and solar fluctuations during the frequency modulation process is obtained. The specific operations are as follows:

[0093]

[0094] in, are the response powers of energy storage, photovoltaic and wind power modules at time tn respectively; are the response powers of energy storage, photovoltaic and wind power modules at time tn-1 respectively; are the frequency modulation instructions for energy storage, photovoltaic and wind power modules at time tn-1 considering the wind and solar fluctuations; dn is the differential step size; is the grid-connected point power response.

[0095] The present invention is further described below through simulation experiments.

[0096] The boundary conditions are set as follows: the rated capacity of the station is 605MW, the adjustment coefficient is 33.33, the energy storage response time constant is 0.1s, the steady-state AGC instructions of wind power and photovoltaic power are 106MW and 64MW respectively, and the energy storage power adjustable margin is sufficient. Two power shortage scenarios are set:

[0097] Scenario 1: The frequency steps negatively by 0.1 Hz.

[0098] Scenario 2: Power disturbance -40MW, the external grid is equivalent to a synchronous machine, and the wind and solar power fluctuations are the same as in Scenario 1.

[0099] In scenario 1, the frequency has a negative step of 0.1 Hz, and the total power theoretical increase is 40.3 MW. Figure 2 In order to ignore the power changes of wind power, photovoltaics, energy storage and grid-connected points when wind and solar power fluctuations are not taken into account, it can be seen that the actual power increase of the grid-connected point cannot achieve the expected effect due to the influence of wind and solar power fluctuations. Figure 3 and Figure 4 This is a comparison of the power responses of energy storage and grid-connected points under a frequency regulation instruction calculation method that takes into account the fluctuations in wind and solar power during the frequency regulation process. It can be seen that the energy storage bears the fluctuations in wind and solar power, and the power increment at the grid-connected point can respond well to frequency changes.

[0100] Scenario 2 Power Disturbance - 40MW, Figure 5 and Figure 6 The frequency change comparison chart and energy storage power response comparison chart under the disturbance are shown respectively. It can be seen that under the primary frequency modulation instruction calculation method considering the wind and solar fluctuations in the primary frequency modulation process, the frequency extreme point increased by 0.007Hz and the steady-state frequency increased by 0.03Hz, which can better improve the system frequency.

[0101] Embodiment 2

[0102] like Figure 7 As shown, a frequency modulation instruction calculation system considering wind and solar fluctuations in the frequency modulation process includes:

[0103] A primary frequency modulation grid-connected point frequency modulation total instruction generation module is used to generate a total theoretical power instruction increment and a total frequency modulation instruction of the grid-connected point according to the frequency change;

[0104] The energy storage, photovoltaic and wind power primary frequency regulation instruction allocation module is used to allocate the total frequency regulation instruction of the grid connection point to the energy storage, photovoltaic and wind power modules according to the adjustable power margin of each power source. When the adjustable power margin of the energy storage is sufficient, the new energy storage, photovoltaic and wind power primary frequency regulation instructions are calculated taking into account the fluctuation of wind and solar power.

[0105] The power response module is used to model the dynamic response of wind power, photovoltaic and energy storage modules, and convert them into discrete models in the time domain according to the finite difference method. It responds according to the calculated primary frequency modulation instructions of each power source to obtain the power response of the grid connection point.

[0106] If the above functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program code.

[0107] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0108] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0109] It is worth noting that the contents not elaborated in detail in the present invention are all prior art and are well known to those skilled in the art.

[0110] Therefore, the present invention adopts the above-mentioned method, system, electronic device and medium for calculating a primary frequency modulation instruction that takes into account the fluctuations of wind and solar power during the frequency modulation process, which can achieve the expected power response of the grid-connected point under different wind and solar power resources, help new energy stations to effectively deal with the power shortage in the power system under various wind and solar power scenarios, and improve the frequency support capability of new energy stations.

[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A method for calculating a frequency modulation instruction taking into account wind and solar fluctuations during frequency modulation, characterized in that: The following steps are involved: Step S1, establishing a control architecture and a primary frequency modulation command calculation method for a wind, solar, energy storage and new energy station; Step S2, establishing a frequency modulation instruction calculation method that takes into account wind and solar fluctuations during the frequency modulation process; Step S3, dynamically model the wind power, photovoltaic, and energy storage modules, and convert them into discrete models in the time domain according to the finite difference method. Combined with the primary frequency modulation command calculation method in step S2, the power response of the grid connection point taking into account the wind and solar fluctuations during the frequency modulation process is obtained.

2. A method for calculating a frequency modulation instruction taking into account wind and solar fluctuations during frequency modulation according to claim 1, characterized in that: In step S1, the control architecture of the wind, solar, energy storage new energy station is that the wind, solar, energy storage new energy station calculates the total theoretical power increment of the wind, solar, energy storage new energy station according to the measured frequency change of the grid connection point, and combines the initial AGC instruction of the wind, solar, energy storage new energy station to issue a frequency modulation instruction to the wind power, photovoltaic and energy storage modules.

3. A method for calculating a frequency modulation instruction taking into account wind and solar fluctuations during frequency modulation according to claim 2, characterized in that: In step S1, the frequency modulation instruction is calculated as follows: in, is the total theoretical power increment of the wind, solar, and storage new energy station; K is the primary frequency regulation droop coefficient of the wind, solar, and storage new energy station; Δf is the frequency change of the wind, solar, and storage new energy station at the grid connection point; R∑ is the total power adjustable margin of the wind, solar, and storage new energy station; The total power command for wind, solar and storage renewable energy stations taking into account the power increment; It is the initial AGC instruction for wind, solar and storage new energy stations; According to the primary frequency regulation command allocation logic of the wind, solar and energy storage new energy station, the total power command of the wind, solar and energy storage new energy station taking into account the power increment is allocated to the wind power, photovoltaic and energy storage modules: in, They are the total power instructions allocated to the energy storage, photovoltaic, and wind power modules respectively.

4. A method for calculating a frequency modulation instruction taking into account wind and solar fluctuations during frequency modulation according to claim 3, characterized in that: There are three allocation scenarios for allocating the total power command of the wind, solar and energy storage new energy station taking into account the power increment to wind power, photovoltaic and energy storage modules: Distribution 1: When the adjustable margin of energy storage power is sufficient, the total theoretical power increment of the wind, solar and energy storage new energy station is fully responded by the energy storage module, and the total power instruction of the energy storage module is: in, Initial AGC instruction for the energy storage module; Allocation Scenario 2: When the adjustable margin of energy storage power is insufficient and the adjustable margin of photovoltaic power is sufficient, the total theoretical power increment of the wind-solar-storage new energy station is fully responded by the energy storage module and the photovoltaic module. The total power instructions of the energy storage module and the photovoltaic module are: Among them, R bess It is the adjustable margin of energy storage power; It is the initial AGC instruction of the photovoltaic module; Allocation situation three: When the adjustable margin of energy storage power and photovoltaic power is insufficient, the total theoretical power increment of the wind-solar-storage new energy station is jointly responded by the energy storage module, photovoltaic module and wind power module. The total power instructions of the energy storage module, photovoltaic module and wind power module are respectively: Among them, R pv is the photovoltaic power adjustable margin; P is the initial AGC instruction of the wind power module; windmax The maximum wind power that can be generated.

5. A method for calculating a frequency modulation instruction taking into account wind and solar fluctuations during frequency modulation according to claim 4, characterized in that: In step S2, a frequency modulation instruction is calculated considering the fluctuation of wind and solar power during the frequency modulation process. The total power instruction is completely determined by the frequency change and the fluctuation of wind and solar power: In the formula, ΔP pv,t , ΔP wind,t are the changes of photovoltaic and wind power relative to the initial AGC command power at time t; When the adjustable margin of energy storage power responds to the theoretical increment of total power but does not fully respond to the fluctuation of wind and solar power, the total power instruction of the energy storage module is:

6. A method for calculating a frequency modulation instruction taking into account wind and solar fluctuations during frequency modulation according to claim 5, characterized in that: In step S3, dynamic response modeling is performed on wind power, photovoltaic, and energy storage modules. The specific operations are as follows: in, are the response powers of energy storage, photovoltaic and wind power modules respectively; T bess , T pv , T wind are the response time constants of energy storage, photovoltaic and wind power modules respectively.

7. A method for calculating a frequency modulation instruction taking into account wind and solar fluctuations during frequency modulation according to claim 6, characterized in that: In step S3, the finite difference method is used to convert the model into a discretized model in the time domain, and the power response of the grid connection point taking into account the wind and solar fluctuations in the frequency modulation process is obtained by combining the primary frequency modulation instruction method. The specific operation is as follows: in, are the response powers of energy storage, photovoltaic and wind power modules at time tn respectively; are the response powers of energy storage, photovoltaic and wind power modules at time tn-1 respectively; are the frequency modulation instructions for energy storage, photovoltaic and wind power modules at time tn-1 considering the wind and solar fluctuations; dn is the differential step size; is the grid-connected point power response.

8. A frequency modulation instruction calculation system considering wind and solar fluctuations during frequency modulation, characterized in that: include: A primary frequency modulation grid-connected point frequency modulation total instruction generation module is used to generate a total theoretical power instruction increment and a total frequency modulation instruction of the grid-connected point according to the frequency change; The energy storage, photovoltaic and wind power primary frequency regulation instruction allocation module is used to allocate the total frequency regulation instruction of the grid connection point to the energy storage, photovoltaic and wind power modules according to the adjustable power margin of each power source. When the adjustable power margin of the energy storage is sufficient, the new energy storage, photovoltaic and wind power primary frequency regulation instructions are calculated taking into account the fluctuation of wind and solar power. The power response module is used to model the dynamic response of wind power, photovoltaic and energy storage modules, and convert them into discrete models in the time domain according to the finite difference method. It responds according to the calculated primary frequency modulation instructions of each power source to obtain the power response of the grid connection point.

9. A computer device comprising: Memory and processor; The memory stores a computer program, characterized in that when the processor executes the computer program, the steps of the method for calculating a frequency modulation instruction taking into account wind and solar power fluctuations in the frequency modulation process described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for calculating a frequency modulation instruction taking into account wind and solar power fluctuations in the frequency modulation process as described in any one of claims 1 to 7 are implemented.

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