A frequency control method, device and equipment for primary frequency regulation of a wind farm

Abstract

The present application relates to a kind of wind farm primary frequency modulation parameter frequency control method, device and equipment, the method includes the simulation model of island power grid system black start is built;After simulation model runs, according to n*5% island power grid system load is respectively input simulation model, obtain the n primary frequency modulation parameters that meet constraint condition;N primary frequency modulation parameters are all input into the primary frequency modulation control device of island power grid system, and real-time acquisition load parameter in the black start process of island power grid system;According to the load parameter of real-time acquisition, select corresponding primary frequency modulation parameter to control the operation of island power grid system.The method improves the primary frequency modulation modulation effect of island power grid system wind farm, realizes to adapt to the case that island power grid system is in black start period, enhances the reliability and stability of island power grid system operation with the continuous change of load.

Description

Technical Field

[0001] This invention relates to the field of power system technology, and in particular to a method, apparatus and equipment for controlling the primary frequency regulation parameters of a wind farm. Background Technology

[0002] Connecting island power grids to the mainland grid is costly, therefore island power grids typically operate as isolated grids. Islands possess abundant wind energy resources, and island microgrids, primarily powered by wind, are characterized by low rotational inertia and significant impacts of load changes on power system frequency. During the black start process of island microgrids, frequency control of wind farms plays a crucial role in stabilizing the power system frequency, and the proportional gain coefficient and integral time constant of the PI stage in primary frequency regulation are tuned based on the characteristics of the actual AC system.

[0003] The existing primary frequency regulation control method for wind farms is based on the grid connection frequency, actual active power and reactive power at the wind farm outlet, and wind speed of each turbine collected by the wind farm control power system. It uses linear interpolation to calculate the maximum active power that each turbine can generate at the current wind speed, and also calculates the maximum active power that the entire wind farm can generate. It calculates the reserve capacity of active power required for the wind farm to participate in primary frequency regulation. When fluctuations in the grid frequency are detected, if the fluctuations exceed the preset frequency dead zone, the primary frequency regulation function is enabled. A droop control is used to establish the relationship between frequency and active power, and a reference value for the wind farm's active power is calculated. The deviation between the wind farm's active power reference value and the actual value is used as the input for AGC (Automatic Generation Control). A PI controller calculates the wind farm's active power output and sends it to each controllable turbine within the wind farm.

[0004] In large power grids, the primary frequency regulation control method described above allows for relatively stable power system capacity and constant PI link parameters. However, during the black start process on islands, the impact of load input on power system capacity is significant. Therefore, the same set of primary frequency regulation parameters has a large difference in frequency regulation effect for power systems with different capacities. That is, during the black start of the power grid, the capacity of the power system changes continuously with the input of load, and the moment of inertia of the power system also changes accordingly. The existing primary frequency regulation control method for wind farms cannot adjust its control parameters according to the changes in power system capacity, and cannot adapt to the changes in the AC system during the black start of the island power grid system. It also has insufficient modulation effect on frequency fluctuations caused by load input. Summary of the Invention

[0005] This invention provides a method, apparatus, and equipment for controlling the primary frequency regulation parameters of a wind farm, which solves the technical problem that existing primary frequency regulation control methods for wind farms cannot be adjusted with changes in power system capacity, resulting in poor modulation effects.

[0006] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0007] A frequency control method for primary frequency regulation parameters of a wind farm, applied to an island power grid system, includes the following steps:

[0008] Construct a simulation model of black start for an island power grid system;

[0009] After the simulation model is run, n*5% of the island power grid system load is respectively put into the simulation model to obtain n primary frequency regulation parameters that meet the constraints.

[0010] All n primary frequency regulation parameters are input into the primary frequency regulation control device of the island power grid system, and the load parameters of the island power grid system during the black start process are obtained in real time.

[0011] Based on the real-time acquired load parameters, the corresponding primary frequency regulation parameters are selected in the primary frequency regulation control device to control the operation of the island power grid system;

[0012] Where n is a natural number from 1 to 20, and the constraint condition is that the frequency of the primary frequency modulation parameter is greater than the minimum frequency threshold and less than the maximum frequency threshold.

[0013] Preferably, the frequency control method for the primary frequency regulation parameter of the wind farm includes: inputting the simulation model according to n*5% of the island power grid system load; if a primary frequency regulation value that does not meet the constraints is obtained, the parameters of the PI controller in the simulation model are adjusted by an optimization algorithm for the primary frequency regulation value, and a new primary frequency regulation value is obtained again until the new primary frequency regulation value meets the constraints, and the new primary frequency regulation value is used as the primary frequency regulation parameter number.

[0014] Preferably, the minimum frequency threshold is 49.5 Hz and the maximum frequency threshold is 50.5 Hz.

[0015] Preferably, the frequency control method for the primary frequency regulation parameters of the wind farm includes: constructing a black-start simulation model of the island power grid system in the simulation model of the power system.

[0016] Preferably, the island power grid system includes M groups of wind turbine generators, a primary frequency control device, a PI integral proportional controller, and a load. The primary frequency control device is connected to each group of wind turbine generators and is also connected to the PI integral proportional controller. The output of the PI integral proportional controller is connected to the load.

[0017] The present invention also provides a frequency control device for primary frequency regulation parameters of a wind farm, which is applied to an island power grid system, including: a model building module, a parameter acquisition module, a load acquisition module and a control module;

[0018] The model building module is used to build a simulation model of black start for the island power grid system;

[0019] The parameter acquisition module is used to input the simulation model according to n*5% of the island power grid system load after the simulation model is run, so as to obtain n primary frequency regulation parameters that meet the constraints.

[0020] The load acquisition module is used to input all n primary frequency regulation parameters into the primary frequency regulation control device of the island power grid system, and to acquire the load parameters of the island power grid system in real time during the black start process.

[0021] The control module is used to select the corresponding primary frequency regulation parameter in the primary frequency regulation control device to control the operation of the island power grid system based on the load parameters acquired in real time.

[0022] Where n is a natural number from 1 to 20, and the constraint condition is that the frequency of the primary frequency modulation parameter is greater than the minimum frequency threshold and less than the maximum frequency threshold.

[0023] Preferably, the parameter acquisition module is further configured to, based on the obtained primary frequency modulation value that does not meet the constraint conditions, use an optimization algorithm to adjust the parameters of the PI controller in the simulation model for the primary frequency modulation value, and re-acquire a new primary frequency modulation value until the obtained new primary frequency modulation value meets the constraint conditions, and the new primary frequency modulation value is used as the primary frequency modulation parameter.

[0024] Preferably, the minimum frequency threshold is 49.5 Hz and the maximum frequency threshold is 50.5 Hz.

[0025] Preferably, the model building module is used to build a black-start simulation model of an island power grid system in a power system simulation model.

[0026] The present invention also provides a frequency control device for primary frequency regulation parameters of a wind farm, including a processor and a memory;

[0027] The memory is used to store program code and transmit the program code to the processor;

[0028] The processor is used to execute the frequency control method for primary frequency regulation parameters of the wind farm as described above, according to the instructions in the program code.

[0029] As can be seen from the above technical solutions, the embodiments of the present invention have the following advantages: the frequency control method, device, and equipment for the primary frequency regulation parameters of the wind farm, the method includes: constructing a simulation model of the black start of the island power grid system; after the simulation model is running, inputting n*5% of the island power grid system load into the simulation model respectively to obtain n primary frequency regulation parameters that meet the constraints; inputting all n primary frequency regulation parameters into the primary frequency regulation control device of the island power grid system, and acquiring the load parameters of the island power grid system in real time during the black start process; selecting the corresponding primary frequency regulation parameter in the primary frequency regulation control device to control the operation of the island power grid system according to the real-time acquired load parameters. The frequency control method for primary frequency regulation parameters of this wind farm obtains primary frequency regulation parameters under n different loads of the island power grid system by constructing a simulation model. During the black start period, the island power grid system acquires load parameters in real time and selects the corresponding primary frequency regulation parameters according to the load parameters. This improves the primary frequency regulation modulation effect of the wind farm in the island power grid system, and enables it to adapt to the continuous load changes of the island power grid system during the black start period. This enhances the reliability and stability of the island power grid system and solves the technical problem that the existing primary frequency regulation control method for wind farms cannot be adjusted with the changes in power system capacity and has poor modulation effect. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a flowchart of the steps of the frequency control method for primary frequency regulation parameters of a wind farm according to an embodiment of the present invention;

[0032] Figure 2 This is a framework diagram of the island power grid system in the frequency control method for primary frequency regulation parameters of a wind farm according to an embodiment of the present invention;

[0033] Figure 3 This is a frame diagram of the frequency control device for the primary frequency regulation parameters of the wind farm according to an embodiment of the present invention. Detailed Implementation

[0034] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0035] The terminology explained in this application is as follows:

[0036] An island power grid refers to a power grid that operates independently without any connection to the main mainland power grid. It is characterized by small installed capacity, light load, and low rotational inertia. Under normal operating conditions, the frequency deviation of the power system is limited to ±0.2Hz. When the power system capacity is small, the limit can be relaxed to ±0.5Hz.

[0037] Primary frequency regulation refers to the automatic control process in which the control system of the generating units in the power grid automatically controls the increase or decrease of the active power of the generating units when the frequency of the power grid deviates from the rated value, thereby limiting the change of the power grid frequency and maintaining the stability of the power grid frequency.

[0038] Black start refers to the process of restoring power supply to a power system after it has been shut down due to a fault. This complex process is typically divided into three stages based on the characteristics of different time periods during the restoration: the black start stage, the grid restoration stage, and the load restoration stage. In the black start process of an island power grid system, the restored generating capacity is relatively small. Excessive load input can cause the AC system frequency to deviate beyond the frequency offset limit. Frequency constraints are one of the main factors limiting the amount of load restoration.

[0039] A PI (Proportional-Integral) controller is a linear controller. It calculates the control deviation between a given value and the actual output value, and then linearly combines the proportional and integral components of this deviation to form the control quantity, which controls the controlled object. Proportional regulation: It reacts proportionally to the system deviation. Once a deviation occurs in the power system, proportional regulation immediately takes effect to reduce it. The strength of the proportional regulation depends on the proportional gain coefficient kp. A large proportional gain can speed up regulation and reduce errors, but an excessively large proportional gain can decrease system stability and even cause instability. Integral regulation: It eliminates steady-state errors in the power system and improves error-free performance. Integral regulation occurs as long as there is an error, until there is no error, at which point it stops, and the integral output becomes a constant value. The strength of the integral action depends on the integral time constant Ti. The smaller the Ti value, the stronger the integral action. Conversely, a large Ti value results in a weak integral action. Adding integral regulation can decrease power system stability and slow down dynamic response.

[0040] This application provides a method, apparatus, and equipment for controlling the primary frequency regulation parameters of a wind farm, which is applied to an island power grid system. It solves the technical problem that the existing primary frequency regulation control method for wind farms cannot be adjusted with changes in power system capacity, resulting in poor modulation effect.

[0041] Example 1:

[0042] Figure 1 This is a flowchart illustrating the steps of the frequency control method for primary frequency regulation parameters of a wind farm according to an embodiment of the present invention. Figure 2 This is a framework diagram of the island power grid system in the frequency control method for primary frequency regulation parameters of a wind farm according to an embodiment of the present invention.

[0043] like Figure 1 and Figure 2 As shown, this embodiment of the invention provides a frequency control method for primary frequency regulation parameters of a wind farm, applied to an island power grid system. The island power grid system includes M groups of wind turbine generators 10, a primary frequency regulation control device 20, a PI integral proportional controller 30, and a load 40. The primary frequency regulation control device 20 is connected to each group of wind turbine generators 10, and the primary frequency regulation control device 20 is also connected to the PI integral proportional controller 30. The output terminal of the PI integral proportional controller 30 is connected to the load 40.

[0044] like Figure 1 As shown, the frequency control method for the primary frequency regulation parameters of a wind farm includes the following steps:

[0045] S1. Construct a simulation model of black start for an island power grid system.

[0046] It should be noted that the main purpose is to construct a black-start simulation model of the island power grid system within the power system simulation model, providing a simulation model for subsequent steps.

[0047] S2. After the simulation model is run, the load of the island power grid system is applied to the simulation model according to n*5% of the load, and n primary frequency regulation parameters that meet the constraints are obtained. Wherein, n is a natural number from 1 to 20.

[0048] It should be noted that starting the simulation model means that the wind farm in the island power grid system of the simulation model is connected to the grid. The simulation model is then used at loads of 5%, 10%, 15%...95%, and 100% of the island power grid system to obtain the primary frequency regulation parameter PI that meets the constraints corresponding to the load of the island power grid system. 5％ PI 10％ PI 15％ PI 20％ ..., PI 95％ PI 100％In order to improve the reliability and stability of the island power grid system, the primary frequency regulation parameters corresponding to the load parameters are selected to regulate the island power grid system as the load parameters change continuously with the network during actual operation.

[0049] In this embodiment of the invention, the constraint condition is that the frequency of the primary frequency modulation parameter is greater than the minimum frequency threshold and less than the maximum frequency threshold.

[0050] It should be noted that the minimum and maximum frequency thresholds can be set according to requirements. In this embodiment, the minimum frequency threshold can be selected as 49.5Hz, and the maximum frequency threshold can be selected as 50.5Hz. The primary frequency modulation parameters refer to the proportional and integral parameters used to regulate the PI integral-proportional control.

[0051] S3. Input all n primary frequency regulation parameters into the primary frequency regulation control device of the island power grid system, and obtain the load parameters of the island power grid system in real time during the black start process.

[0052] It should be noted that step S3 mainly involves inputting the primary frequency regulation parameters obtained in step S2 under different percentages of island power grid system load into the primary frequency regulation control device of the island power grid system and acquiring the load parameters of the island power grid system in real time during the black start process. This facilitates the island power grid system in selecting the primary frequency regulation parameters corresponding to the load parameters during the black start process based on the real-time acquired load parameters.

[0053] S4. Based on the real-time acquired load parameters, select the corresponding primary frequency regulation parameters in the primary frequency regulation control device to control the operation of the island power grid system.

[0054] It should be noted that step S4 mainly involves inputting the primary frequency regulation parameters obtained in step S2 under different load levels of the island power grid system into the primary frequency regulation control device. Based on the real-time load parameters of the island power grid system during black start, the corresponding primary frequency regulation parameters are applied according to the load parameters to achieve switching of the primary frequency regulation parameters based on the load parameters. This adapts to the load changes of the island power grid system during black start, avoiding insufficient modulation effect of frequency fluctuations caused by load input, and preventing frequency instability due to overshoot of the power grid system after load input. In this embodiment, n primary frequency regulation parameters are obtained corresponding to different load levels of the island power grid system. The corresponding primary frequency regulation parameters are selected by real-time acquisition of the load level of the island power grid system (for example, if the load parameter is 20% of the island power grid system load, then the primary frequency regulation parameter is PI). 20％This system adapts to the changing load conditions during black start-up of the island power grid by adjusting the primary frequency regulation parameters under different load levels, thereby ensuring the frequency stability of the island power grid system and enhancing its reliability and stability.

[0055] This invention provides a frequency control method for primary frequency regulation parameters in a wind farm, comprising: constructing a simulation model of a black start of an island power grid system; after the simulation model is running, inputting n*5% of the island power grid system load into the simulation model to obtain n primary frequency regulation parameters that meet the constraints; inputting all n primary frequency regulation parameters into the primary frequency regulation control device of the island power grid system, and acquiring the load parameters of the island power grid system in real time during the black start process; and selecting the corresponding primary frequency regulation parameter in the primary frequency regulation control device to control the operation of the island power grid system based on the real-time acquired load parameters. This method for primary frequency regulation parameter control in a wind farm obtains n primary frequency regulation parameters under different island power grid system loads by constructing a simulation model. The island power grid system acquires load parameters in real time during the black start period, and selects the corresponding primary frequency regulation parameter based on the load parameters. This improves the primary frequency regulation modulation effect of the wind farm in the island power grid system, adapting to the continuous load changes during the black start period, enhancing the reliability and stability of the island power grid system operation, and solving the technical problem that existing primary frequency regulation control methods for wind farms cannot adjust with changes in power system capacity and have poor modulation effects.

[0056] In one embodiment of the present invention, the frequency control method for the primary frequency regulation parameter of the wind farm includes: inputting simulation models according to n*5% of the island power grid system load; if a primary frequency regulation value that does not meet the constraints is obtained, the parameters of the PI controller in the simulation model are adjusted by an optimization algorithm for the primary frequency regulation value, and a new primary frequency regulation value is obtained again until the new primary frequency regulation value meets the constraints, and the new primary frequency regulation value is used as the primary frequency regulation parameter.

[0057] It should be noted that the optimization algorithm can be particle swarm optimization, genetic algorithm, etc., which will not be discussed in detail here.

[0058] In this embodiment of the invention, during the process of obtaining primary frequency regulation parameters that meet the constraints in the simulation model, the primary frequency regulation values ​​obtained by inputting the load of the island power grid system into the simulation model do not necessarily meet the constraints. If the primary frequency regulation values ​​obtained by inputting the load of the island power grid system into the simulation model do not meet the constraints, the parameters of the PI controller of the island power grid system in the simulation model need to be adjusted using an optimization algorithm until the adjusted primary frequency regulation values ​​meet the constraints. The primary frequency regulation values ​​that meet the constraints are used as primary frequency regulation parameters, so that the primary frequency regulation parameters are the optimal primary frequency regulation parameters for the wind farm in the island power grid system at the corresponding load level.

[0059] Example 2:

[0060] Figure 3 This is a frame diagram of the frequency control device for the primary frequency regulation parameters of the wind farm according to an embodiment of the present invention.

[0061] like Figure 3 As shown, this embodiment of the invention also provides a frequency control device for primary frequency regulation parameters of a wind farm, which is applied to an island power grid system, including: a model building module 101, a parameter acquisition module 102, a load acquisition module 103, and a control module 104;

[0062] Model building module 101 is used to build a simulation model of black start for island power grid system;

[0063] The parameter acquisition module 102 is used to input n*5% of the island power grid system load into the simulation model after the simulation model is run, so as to obtain n primary frequency regulation parameters that meet the constraints.

[0064] The load acquisition module 103 is used to input n primary frequency regulation parameters into the primary frequency regulation control device of the island power grid system, and to acquire the load parameters of the island power grid system in real time during the black start process.

[0065] The control module 104 is used to select the corresponding primary frequency regulation parameters in the primary frequency regulation control device to control the operation of the island power grid system based on the load parameters acquired in real time.

[0066] Where n is a natural number from 1 to 20, and the constraint is that the frequency of the primary frequency modulation parameter is greater than the minimum frequency threshold and less than the maximum frequency threshold.

[0067] In this embodiment of the invention, the parameter acquisition module 102 is further configured to, based on the obtained primary frequency modulation value that does not meet the constraint conditions, use an optimization algorithm to adjust the parameters of the PI controller in the simulation model for the primary frequency modulation value, and re-acquire a new primary frequency modulation value until the obtained new primary frequency modulation value meets the constraint conditions, and the new primary frequency modulation value is used as the primary frequency modulation parameter.

[0068] In this embodiment of the invention, the minimum frequency threshold is 49.5 Hz and the maximum frequency threshold is 50.5 Hz.

[0069] In this embodiment of the invention, the model building module 101 is used to build a simulation model of black start of an island power grid system in the simulation model of the power system.

[0070] It should be noted that the modules in the device of Embodiment 2 correspond to the steps in the method of Embodiment 1. The content of the steps in the method of Embodiment 1 has been described in detail in Embodiment 1, and the module content of the device will not be described in detail in this Embodiment 2.

[0071] Example 3:

[0072] This invention provides a frequency control device for primary frequency regulation parameters of a wind farm, including a processor and a memory;

[0073] Memory is used to store program code and transfer the program code to the processor;

[0074] The processor is used to execute the frequency control method for the primary frequency regulation parameters of the wind farm as described above, according to the instructions in the program code.

[0075] It should be noted that the processor is used to execute the steps in the above-described embodiment of a frequency control method for primary frequency regulation parameters of a wind farm according to the instructions in the program code. Alternatively, when the processor executes the computer program, it implements the functions of each module / unit in the above-described system / device embodiments.

[0076] For example, a computer program can be divided into one or more modules / units, one or more of which are stored in memory and executed by a processor to complete this application. One or more modules / units can be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program in a terminal device.

[0077] Terminal devices can be computing devices such as desktop computers, laptops, handheld computers, and cloud servers. Terminal devices may include, but are not limited to, processors and memory. Those skilled in the art will understand that this does not constitute a limitation on the terminal device, which may include more or fewer components than illustrated, or combinations of certain components, or different components. For example, a terminal device may also include input / output devices, network access devices, buses, etc.

[0078] The processor referred to can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor.

[0079] Memory can be an internal storage unit of a terminal device, such as a hard drive or RAM. Memory can also be an external storage device, such as a plug-in hard drive, SmartMedia Card (SMC), Secure Digital (SD) card, or Flash Card. Furthermore, memory can include both internal and external storage units. Memory is used to store computer programs and other programs and data required by the terminal device. Memory can also be used to temporarily store data that has been output or will be output.

[0080] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0081] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0082] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0083] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0084] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0085] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A frequency control method for primary frequency regulation parameters of a wind farm, applied to an island power grid system, characterized in that, Includes the following steps: Construct a simulation model of black start for an island power grid system; After the simulation model is run, n*5% of the island power grid system load is respectively put into the simulation model to obtain n primary frequency regulation parameters that meet the constraints. All n primary frequency regulation parameters are input into the primary frequency regulation control device of the island power grid system, and the load parameters of the island power grid system during the black start process are obtained in real time. Based on the real-time acquired load parameters, the corresponding primary frequency regulation parameters are selected in the primary frequency regulation control device to control the operation of the island power grid system; Where n is a natural number from 1 to 20, the constraint condition is that the frequency of the primary frequency modulation parameter is greater than the minimum frequency threshold and less than the maximum frequency threshold; the primary frequency modulation parameter refers to the proportional parameter and integral parameter used to regulate the PI integral proportional control.

2. The frequency control method for primary frequency regulation parameters of a wind farm according to claim 1, characterized in that, include: The simulation model is configured with n*5% of the island power grid system load. If a primary frequency regulation value is obtained that does not meet the constraints, the parameters of the PI controller in the simulation model are adjusted using an optimization algorithm to obtain a new primary frequency regulation value. This process continues until the new primary frequency regulation value meets the constraints, and the new primary frequency regulation value is used as the primary frequency regulation parameter.

3. The frequency control method for primary frequency regulation parameters of a wind farm according to claim 1, characterized in that, The minimum frequency threshold is 49.5 Hz, and the maximum frequency threshold is 50.5 Hz.

4. The frequency control method for primary frequency regulation parameters of a wind farm according to claim 1, characterized in that, include: A black-start simulation model of an island power grid system is constructed within a power system simulation model.

5. The frequency control method for primary frequency regulation parameters of a wind farm according to claim 1, characterized in that, The island power grid system includes M groups of wind turbine generators, a primary frequency control device, a PI integral proportional controller, and loads. The primary frequency control device is connected to each group of wind turbine generators and is also connected to the PI integral proportional controller. The output of the PI integral proportional controller is connected to the loads.

6. A frequency control device for primary frequency regulation parameters of a wind farm, applied to an island power grid system, characterized in that, include: The module includes a model building module, a parameter acquisition module, a load acquisition module, and a control module. The model building module is used to build a simulation model of black start for the island power grid system; The parameter acquisition module is used to input the simulation model according to n*5% of the island power grid system load after the simulation model is run, so as to obtain n primary frequency regulation parameters that meet the constraints. The load acquisition module is used to input all n primary frequency regulation parameters into the primary frequency regulation control device of the island power grid system, and to acquire the load parameters of the island power grid system in real time during the black start process. The control module is used to select the corresponding primary frequency regulation parameter in the primary frequency regulation control device to control the operation of the island power grid system based on the load parameters acquired in real time. Where n is a natural number from 1 to 20, the constraint condition is that the frequency of the primary frequency modulation parameter is greater than the minimum frequency threshold and less than the maximum frequency threshold; the primary frequency modulation parameter refers to the proportional parameter and integral parameter used to regulate the PI integral proportional control.

7. The frequency control device for primary frequency regulation parameters of a wind farm according to claim 6, characterized in that, The parameter acquisition module is further configured to, based on the obtained primary frequency modulation value that does not meet the constraint conditions, use an optimization algorithm to adjust the parameters of the PI controller in the simulation model, and re-acquire a new primary frequency modulation value until the obtained new primary frequency modulation value meets the constraint conditions, and the new primary frequency modulation value is used as the primary frequency modulation parameter.

8. The frequency control device for primary frequency regulation parameters of a wind farm according to claim 6, characterized in that, The minimum frequency threshold is 49.5 Hz, and the maximum frequency threshold is 50.5 Hz.

9. The frequency control device for primary frequency regulation parameters of a wind farm according to claim 6, characterized in that, The model building module is used to build a black-start simulation model of an island power grid system in the simulation model of the power system.

10. A frequency control device for primary frequency regulation parameters in a wind farm, characterized in that, Including the processor and memory; The memory is used to store program code and transmit the program code to the processor; The processor is configured to execute the frequency control method for primary frequency regulation parameters of a wind farm as described in any one of claims 1-5, according to the instructions in the program code.

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