A primary frequency modulation control method for a wind farm with storage generation system

Abstract

The present application relates to the technical field of power system frequency modulation, and discloses a primary frequency modulation control method for a wind farm storage power generation system, which collects secondary voltage and current signals of a wind farm grid-connected point, calculates frequency and positive sequence voltage amplitude, judges new energy station frequency modulation according to the frequency and positive sequence voltage amplitude, and divides wind farm storage power generation system frequency modulation into wind power and energy storage system joint frequency modulation and independent frequency modulation; for joint frequency modulation, calculates frequency modulation active power distribution according to wind turbine actual output active power, energy storage system actual operation power, wind turbine theoretical available active power, energy storage system full discharge power and energy storage system full charge power, and finally realizes primary frequency modulation adjustment of the wind farm storage power generation system according to wind turbine actual output active power and energy storage system actual operation power, so as to minimize wind farm power loss, fully play the role of wind farm storage and the coordination between them, and improve the utilization rate of energy storage system participating in power grid frequency adjustment.

Description

Technical Field

[0001] This invention relates to the field of power system frequency regulation technology, specifically to a primary frequency regulation control method for a wind farm power generation and storage system. Background Technology

[0002] New energy power generation is characterized by intermittency, randomness, and large fluctuations. Currently, almost all new energy power is absorbed by the grid, placing higher demands on system regulation capabilities. Large-scale grid integration further squeezes the operating space of conventional adjustable energy sources, posing significant challenges to system peak shaving and frequency regulation. Furthermore, existing standards and specifications stipulate that newly built wind farms should be equipped with electrochemical energy storage systems with a capacity ratio of 10%, but these do not fully consider the coordination and cooperation between the two.

[0003] Currently, there are no regulations governing primary frequency regulation for wind farm-integrated energy storage systems, and relevant standards and specifications are lacking. Existing literature largely focuses on wind farms configuring electrochemical energy storage systems to participate in grid primary frequency regulation, but most studies investigate how to replace wind turbines with electrochemical energy storage systems for frequency regulation. Some literature neglects to consider the wind farm's perspective, leading to power loss. Furthermore, existing standards require wind turbines and energy storage systems to have sufficient frequency regulation capabilities, but they do not clearly define the mechanisms for wind turbines and energy storage systems to participate in the frequency regulation ancillary services market. Frequency regulation-induced power loss reduces the wind farm's revenue.

[0004] Therefore, it is urgent to address the shortcomings of existing wind farm power generation and storage systems in participating in the primary frequency regulation of the power grid, to fully leverage the coordinating role of wind farm power generation and storage systems, and to improve the effectiveness of primary frequency regulation. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a primary frequency regulation control method for a wind farm energy storage and power generation system, which improves the primary frequency regulation method of the existing wind farm energy storage and power generation system and enhances the primary frequency regulation performance of the wind farm energy storage and power generation system.

[0006] The technical solution adopted in this invention is as follows:

[0007] A primary frequency regulation control method for a wind farm energy storage and power generation system includes the following steps:

[0008] Step 1, System Monitoring:

[0009] The frequency regulation system of the wind farm's power generation and storage system collects the secondary voltage at the wind farm's grid connection point and calculates the frequency f and positive sequence voltage amplitude U based on the secondary voltage.

[0010] Step 2, determine the first frequency modulation action:

[0011] Based on frequency f and rated frequency f nThe relationship between the absolute value of the frequency regulation and the magnitude of the dead zone Δf of the primary frequency regulation of the wind farm is used to determine whether the primary frequency regulation has been activated.

[0012] Step 3, Voltage Determination:

[0013] Based on the result of the primary frequency regulation action in step two, determine the relationship between the positive sequence voltage amplitude U and the wind farm's low voltage threshold Ud and high voltage threshold Us, and determine whether the primary frequency regulation has been activated.

[0014] Step 4, Frequency modulation method selection:

[0015] Based on the result of the primary frequency regulation action in step three, determine whether the wind power and energy storage system are subject to joint frequency regulation or independent frequency regulation.

[0016] If independent frequency regulation is used, the existing frequency regulation methods for wind power and energy storage systems shall be followed respectively.

[0017] If the wind power and energy storage system are jointly regulated by frequency, it is necessary to further determine whether AGC is engaged and calculate the theoretical value of active power ΔP based on the logic of AGC and primary frequency regulation.

[0018] Step 5, execute the active power action:

[0019] Read the actual output active power of the wind turbine and the actual operating power P of the energy storage system. 风 P 储 If △P>0, and P 风 ≥ Theoretical active power P generated by wind turbine 风理 Then, the theoretical value ΔP for active power action performed by the energy storage system is selected;

[0020] If △P>0, and P 风 <P 风理 P 储 ≥ Energy storage system full discharge power Pn 放 Then, the theoretical value ΔP for active power operation by the wind turbine unit is selected;

[0021] If △P>0, and P 风 <P 风理 At the same time, P 储 <Pn 放 And Pn 放 -P 储 If the value is ≥△P, then the theoretical value △P for the active power action performed by the energy storage system is selected.

[0022] If △P>0 and P 风 <P 风理 At the same time, P 储 <Pn 放 And Pn 放 -P 储If the value is less than ΔP, then the energy storage system will be preferentially selected to execute the theoretical value of active power ΔP. 11 The theoretical value of active power operation of the wind turbine is ΔP. 12 ;where △P 11 =Pn 放 -P 储 , △P 12 =△P-△P 11 ;

[0023] If ΔP < 0, P 储 ≥ Energy storage system full charge power Pn 充 Then, the theoretical value ΔP for active power operation by the wind turbine unit is selected;

[0024] If △P < 0, P 储 <Pn 充 Pn 充 -P 储 If the value is ≥|△P|, then the theoretical value △P for the active power action performed by the energy storage system is selected.

[0025] If △P < 0, P 储 <Pn 充 Pn 充 -P 储 If the value is less than |ΔP|, then the energy storage system will preferentially perform the theoretical active power action ΔP. 21 The theoretical value of active power operation of the wind turbine is ΔP. 22 ;where △P 21 =P 储 -Pn 充 , △P 22 =△P-△P 21 .

[0026] Furthermore, in step 2, the recommended range for the primary frequency regulation dead zone Δf of the wind farm is 0.03–0.1 Hz; if the frequency f is different from the rated frequency f n If the absolute value of the value is greater than the primary frequency regulation dead zone Δf of the wind farm, then the primary frequency regulation operation condition is met.

[0027] Furthermore, in step 3, the low voltage threshold value U of the wind farm d Recommended is 0.8U n High voltage threshold value U s Recommended is 1.15U n If the positive sequence voltage amplitude U of the wind farm satisfies 0.8U n <U<1.15U n If so, then the conditions for a single frequency modulation action are met.

[0028] Furthermore, in step 4, if the wind farm AGC is not engaged, or if the wind farm AGC is engaged but not in the adjustment period, the theoretical value of active power ΔP is directly calculated based on the frequency change.

[0029] If the wind farm's AGC (Automatic Guided Vehicle) is activated, and the AGC is in the regulation period, then the AGC and primary frequency regulation logic are compared, and the AGC command △P is issued. AGC With the wind farm's theoretical frequency regulation active power command △P 调 Calculations yielded the theoretical value of active power ΔP.

[0030] The coordination logic between AGC and primary frequency modulation includes: AGC blocking primary frequency modulation instructions, primary frequency modulation blocking AGC instructions, AGC and primary frequency modulation instructions being superimposed in both the same and opposite directions, AGC and primary frequency modulation instructions being superimposed in the same direction and blocking primary frequency modulation instructions in the opposite direction, and AGC and primary frequency modulation instructions being superimposed in the same direction and blocking AGC instructions in the opposite direction.

[0031] Furthermore, the frequency-regulating active power ΔP of the primary frequency regulation of the wind farm's energy storage system... 调 The calculation method is as follows:

[0032]

[0033] In the formula, K f Represents the active power frequency regulation coefficient; f is the calculated frequency of the secondary voltage; f n Indicates the rated frequency of the power grid; P n风 Indicates the rated capacity of the wind turbine assembly; P n储 This indicates the rated power of the energy storage system.

[0034] Furthermore, in step 5, the actual output active power P of the wind turbine unit 风 The actual operating power P of the energy storage system is obtained through the wind turbine energy management platform or by accumulating the active power of the collection lines. 储 Energy is obtained through the energy management system of the energy storage system.

[0035] Compared with existing technologies, the primary frequency regulation control method of this wind farm energy storage and power generation system has the following advantages:

[0036] (1) The wind farm distribution and energy storage power generation system proposes a method for joint frequency regulation of the wind farm distribution and energy storage power generation system, which can give full play to the role of energy storage in frequency regulation and reduce the power loss of the wind farm. When the frequency regulation of the power generation system needs to reduce the active power, the charging power of the energy storage unit is increased first. When the frequency regulation of the power generation system needs to increase the active power, the wind turbine is used first to increase the active power of the power generation system.

[0037] (2) The primary frequency regulation method of the wind farm energy storage power generation system improves the existing primary frequency regulation method of the wind farm energy storage power generation system, increases the utilization rate of the energy storage system in grid frequency regulation, and improves the primary frequency regulation effect of the wind farm energy storage power generation system.

[0038] (3) The primary frequency regulation method of the wind farm energy storage power generation system fully considers the frequency regulation under the conditions of reserved active power and no reserved active power of the wind turbine, and gives full play to the role of wind farm energy storage. Attached Figure Description

[0039] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. 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.

[0040] in:

[0041] Figure 1 This is a flowchart of the primary frequency regulation control method for the wind farm power generation and storage system of the present invention. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] To address the shortcomings of existing wind farm power generation and storage systems in participating in primary frequency regulation of the power grid, and to fully leverage the coordination and cooperation of wind farm power generation and storage systems to improve the effectiveness of primary frequency regulation, this embodiment provides a primary frequency regulation control method for wind farm power generation and storage systems.

[0044] like Figure 1 As shown, the primary frequency regulation control method of the wind farm's energy storage and power generation system includes the following steps:

[0045] Step 1, System Monitoring:

[0046] The frequency regulation system of the wind farm's power generation and storage system collects the secondary voltage at the wind farm's grid connection point and calculates the frequency f and positive sequence voltage amplitude U based on the secondary voltage.

[0047] Step 2, determine the first frequency modulation action:

[0048] Based on frequency f and rated frequency f nThe relationship between the absolute value of the frequency regulation and the magnitude of the dead zone Δf of the primary frequency regulation of the wind farm is used to determine whether the primary frequency regulation has been activated.

[0049] Furthermore, the recommended range for the primary frequency regulation dead zone Δf in wind farms is 0.03–0.1 Hz; if the frequency f is different from the rated frequency f n If the absolute value of the value is greater than the primary frequency regulation dead zone Δf of the wind farm, then the primary frequency regulation operation condition is met.

[0050] Step 3, Voltage Determination:

[0051] Based on the result of the primary frequency regulation action in step two, the positive sequence voltage amplitude U and the low voltage threshold value U of the wind farm are compared. d High voltage threshold value U s The magnitude of the frequency is used to determine whether a single frequency modulation has been activated.

[0052] Furthermore, the low voltage threshold U of the wind farm d Recommended is 0.8U n High voltage threshold value U s Recommended is 1.15U n If the positive sequence voltage amplitude U of the wind farm satisfies 0.8U n <U<1.15U n If so, then the conditions for a single frequency modulation action are met.

[0053] Step 4, Frequency modulation method selection:

[0054] Based on the result of the primary frequency regulation action in step three, determine whether the wind power and energy storage system are subject to joint frequency regulation or independent frequency regulation.

[0055] If independent frequency regulation is used, the existing frequency regulation methods for wind power and energy storage systems shall be followed respectively.

[0056] If the wind power and energy storage system are jointly regulated by frequency, it is necessary to further determine whether AGC is engaged and calculate the theoretical value of active power ΔP based on the logic of AGC and primary frequency regulation.

[0057] Specifically, if the wind farm AGC is not in operation, or if the wind farm AGC is in operation but not during the regulation period, the theoretical value of active power ΔP is directly calculated based on the frequency change.

[0058] If the wind farm's AGC (Automatic Guided Vehicle) is activated, and the AGC is in the regulation period, then the AGC and primary frequency regulation logic are compared, and the AGC command △P is issued. AGC With the wind farm's theoretical frequency regulation active power command △P 调 Calculations yielded the theoretical value of active power ΔP.

[0059] The coordination logic between AGC and primary frequency modulation includes: AGC blocking primary frequency modulation instructions, primary frequency modulation blocking AGC instructions, AGC and primary frequency modulation instructions being superimposed in both the same and opposite directions, AGC and primary frequency modulation instructions being superimposed in the same direction and blocking primary frequency modulation instructions in the opposite direction, and AGC and primary frequency modulation instructions being superimposed in the same direction and blocking AGC instructions in the opposite direction.

[0060] Frequency regulation active power ΔP of primary frequency regulation in wind farm power distribution and storage system 调 The calculation method is as follows:

[0061]

[0062] In the formula, K f This represents the active power frequency regulation coefficient, with a value of 20; f is the calculated frequency of the secondary voltage; f n This indicates the rated frequency of the power grid, i.e., 50Hz; P n风 Indicates the rated capacity of the wind turbine assembly; P n储 This indicates the rated power of the energy storage system.

[0063] Step 5, execute the active power action:

[0064] Read the actual output active power of the wind turbine and the actual operating power P of the energy storage system. 风 P 储 If △P>0, and P 风 ≥ Theoretical active power P generated by wind turbine 风理 Then, the theoretical value ΔP for active power action performed by the energy storage system is selected;

[0065] If △P>0, and P 风 <P 风理 P 储 ≥ Energy storage system full discharge power Pn 放 Then, the theoretical value ΔP for active power operation by the wind turbine unit is selected;

[0066] If △P>0, and P 风 <P 风理 At the same time, P 储 <Pn 放 And Pn 放 -P 储 If the value is ≥△P, then the theoretical value △P for the active power action performed by the energy storage system is selected.

[0067] If △P>0 and P 风 <P 风理 At the same time, P 储 <Pn 放 And Pn 放 -P 储 If the value is less than ΔP, then the energy storage system will be preferentially selected to execute the theoretical value of active power ΔP.11 The theoretical value of active power operation of the wind turbine is ΔP. 12 ;where △P 11 =Pn 放 -P 储 , △P 12 =△P-△P 11 .

[0068] If ΔP < 0, P 储 ≥ Energy storage system full charge power Pn 充 Then, the theoretical value ΔP for active power operation by the wind turbine unit is selected;

[0069] If △P < 0, P 储 <Pn 充 Pn 充 -P 储 If the value is ≥|△P|, then the theoretical value △P for the active power action performed by the energy storage system is selected.

[0070] If △P < 0, P 储 <Pn 充 Pn 充 -P 储 If the value is less than |ΔP|, then the energy storage system will preferentially perform the theoretical active power action ΔP. 21 The theoretical value of active power operation of the wind turbine is ΔP. 22 ;where △P 21 =P 储 -Pn 充 , △P 22 =△P-△P 21 .

[0071] The actual output active power P of the wind turbine 风 The actual operating power P of the energy storage system is obtained through the wind turbine energy management platform or by accumulating the active power of the collection lines. 储 Energy is obtained through the energy management system of the energy storage system.

[0072] To verify the actual effectiveness of the primary frequency regulation method for the wind farm's energy storage and power generation system, this embodiment also provides the following application examples:

[0073] Application Example 1

[0074] In the simulation, the installed capacity of wind turbine A in a wind farm's energy storage and power generation system is 100MW, and the installed capacity of the energy storage system is 10MW; that is, Pn 充 For 10MW, Pn 放 It is 10MW.

[0075] When a wind turbine operates without reserved active power, the actual output active power P of the wind turbine is... 风The actual operating power P of the energy storage system is 70MW. 储 It is 8MW;

[0076] The primary dead zone Δf is set to 0.05Hz, the grid connection frequency f of the wind farm is changed from 50Hz to 50.2Hz, the secondary voltage U at the grid connection point is 1.0Un, and AGC is not engaged.

[0077] The grid connection frequency of the wind farm is f = 50.2Hz and the rated frequency is f n The absolute value of 50Hz is greater than the primary frequency regulation dead zone Δf = 0.05Hz in the wind farm, and the secondary voltage U at the grid connection point is 1.0U. n The condition 0.8Un < U < 1.15Un is satisfied.

[0078] The calculated theoretical value of active power ΔP is 6.6MW. Since the wind turbine operates under conditions without reserved active power, then P... 风 =P 风理 The theoretical value of active power operation performed by the energy storage system is ΔP = 6.6MW.

[0079] Application Example 2

[0080] In the simulation, the installed capacity of wind turbine B in a wind farm's energy storage and power generation system is 100MW, and the installed capacity of the energy storage system is 10MW; that is, Pn 充 For 10MW, Pn 放 It is 10MW.

[0081] When a wind turbine operates without reserved active power, the actual output active power P of the wind turbine is... 风 The actual operating power P of the energy storage system is 70MW. 储 It is 8MW;

[0082] The primary dead zone Δf is set to 0.05Hz, the grid connection frequency f of the wind farm is changed from 50Hz to 50.2Hz, the secondary voltage U at the grid connection point is 1.1Un, and AGC is not engaged.

[0083] The grid connection frequency of the wind farm is f = 50.2Hz and the rated frequency is f n =50Hz The absolute value is greater than the primary frequency regulation dead zone Δf = 0.05Hz of the wind farm, and the secondary voltage U at the grid connection point is 1.1Un, which satisfies 0.8Un < U < 1.15Un;

[0084] The calculated theoretical value of active power ΔP is -6.6MW. 储 <Pn 充 ;

[0085] Further judgment of Pn 充 -P 储=10MW-8MW=2MW<|△P|, then the energy storage system should be selected to perform the theoretical active power action value △P. 21 =P 储 -Pn 充 =8MW-10MW=-2MW, the theoretical value of active power operation of the wind turbine generator ΔP 22 =△P-△P 21 =-6.6MW-(-2MW)=-4.6MW.

[0086] Application Example 3

[0087] In the simulation, the installed capacity of wind turbine C in a wind farm's energy storage and power generation system is 100MW, and the installed capacity of the energy storage system is 10MW; that is, Pn 充 For 10MW, Pn 放 It is 10MW.

[0088] When a wind turbine operates without reserved active power, the actual output active power P of the wind turbine is... 风 The actual operating power P of the energy storage system is 70MW. 储 It is 8MW;

[0089] The primary frequency regulation dead zone Δf is set to 0.05Hz, the grid connection frequency f of the wind farm is changed from 50Hz to 50.2Hz, and the secondary voltage U of the grid connection point is 1.1Un; AGC is activated, and the activation of AGC is superimposed in the same direction as the primary frequency regulation command and blocked in the opposite direction of the primary frequency regulation command.

[0090] The grid connection frequency of the wind farm is f = 50.2Hz and the rated frequency is f n =50Hz The absolute value is greater than the primary frequency regulation dead zone Δf = 0.05Hz of the wind farm, and the secondary voltage U at the grid connection point is 1.1Un, which satisfies 0.8Un < U < 1.15Un;

[0091] During a single frequency modulation operation, the AGC command reduces the power consumption by 5 MW.

[0092] The calculated theoretical value of active power ΔP is -11.6MW. 储 <Pn 充 ;

[0093] Further judgment of Pn 充 -P 储 =10MW-8MW=2MW<|△P|, then the energy storage system should be selected to perform the theoretical active power action value △P. 21 =P 储 -Pn 充 =8MW-10MW=-2MW, the theoretical value of active power operation of the wind turbine generator ΔP 22 =△P-△P 21=-11.6MW-(-2MW)=-9.6MW.

[0094] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the same elements of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A primary frequency regulation control method for a wind farm power generation and storage system, characterized in that: Includes the following steps: Step 1, System Monitoring: The frequency regulation system of the wind farm's power generation and storage system collects the secondary voltage at the wind farm's grid connection point and calculates the frequency f and positive sequence voltage amplitude U based on the secondary voltage. Step 2, determine the first frequency modulation action: Based on frequency f and rated frequency f n The relationship between the absolute value of the frequency regulation and the magnitude of the dead zone Δf of the primary frequency regulation of the wind farm is used to determine whether the primary frequency regulation has been activated. Step 3, Voltage Determination: Based on the result of the primary frequency regulation action in step two, determine the relationship between the positive sequence voltage amplitude U and the wind farm's low voltage threshold Ud and high voltage threshold Us, and determine whether the primary frequency regulation has been activated. Step 4, Frequency modulation method selection: Based on the result of the primary frequency regulation action in step three, determine whether the wind power and energy storage system are subject to joint frequency regulation or independent frequency regulation. If independent frequency regulation is used, the existing frequency regulation methods for wind power and energy storage systems shall be followed respectively. If the wind power and energy storage system are jointly regulated by frequency, it is necessary to further determine whether AGC is engaged and calculate the theoretical value of active power ΔP based on the logic of AGC and primary frequency regulation. Step 5, execute the active power action: Read the actual output active power of the wind turbine and the actual operating power P of the energy storage system. 风 P 储 If △P>0, and P 风 ≥ Theoretical active power P generated by wind turbine 风理 Then, the theoretical value ΔP for active power action performed by the energy storage system is selected; If △P>0, and P 风 <P 风理 P 储 ≥ Energy storage system full discharge power Pn 放 Then, the theoretical value ΔP for active power operation by the wind turbine unit is selected; If △P>0, and P 风 <P 风理 At the same time, P 储 <Pn 放 And Pn 放 -P 储 If the value is ≥△P, then the theoretical value △P for the active power action performed by the energy storage system is selected. If △P>0 and P 风 <P 风理 At the same time, P 储 <Pn 放 And Pn 放 -P 储 If the value is less than ΔP, then the energy storage system will be preferentially selected to execute the theoretical value of active power ΔP. 11 The theoretical value of active power operation of the wind turbine is ΔP. 12 ;where △P 11 =Pn 放 -P 储 , △P 12 =△P-△P 11 ; If ΔP < 0, P 储 ≥ Energy storage system full charge power Pn 充 Then, the theoretical value ΔP for active power operation by the wind turbine unit is selected; If △P < 0, P 储 <Pn 充 Pn 充 -P 储 If the value is ≥|△P|, then the theoretical value △P for the active power action performed by the energy storage system is selected. If △P < 0, P 储 <Pn 充 Pn 充 -P 储 If the value is less than |ΔP|, then the energy storage system will preferentially perform the theoretical active power action ΔP. 21 The theoretical value of active power operation of the wind turbine is ΔP. 22 ;where △P 21 =P 储 -Pn 充 , △P 22 =△P-△P 21 .

2. The primary frequency regulation control method for a wind farm power generation and storage system according to claim 1, characterized in that: In step 2, the recommended range for the primary frequency regulation dead zone Δf of the wind farm is 0.03–0.1 Hz; if the frequency f is different from the rated frequency f n If the absolute value of the value is greater than the primary frequency regulation dead zone Δf of the wind farm, then the primary frequency regulation operation condition is met.

3. The primary frequency regulation control method for a wind farm power generation and storage system according to claim 1, characterized in that: In step 3, the low voltage threshold value U of the wind farm d Recommended is 0.8U n High voltage threshold value U s Recommended is 1.15U n If the positive sequence voltage amplitude U of the wind farm satisfies 0.8U n <U<1.15U n If so, then the conditions for a single frequency modulation action are met.

4. The primary frequency regulation control method for a wind farm power generation and storage system according to claim 1, characterized in that: In step 4, if the wind farm AGC is not engaged, or if the wind farm AGC is engaged but not in the regulation period, the theoretical value of active power ΔP is directly calculated based on the frequency change. If the wind farm's AGC (Automatic Guided Vehicle) is activated, and the AGC is in the regulation period, then the AGC and primary frequency regulation logic are compared, and the AGC command △P is issued. AGC With the wind farm's theoretical frequency regulation active power command △P 调 Calculations yielded the theoretical value of active power ΔP. The coordination logic between AGC and primary frequency modulation includes: AGC blocking primary frequency modulation instructions, primary frequency modulation blocking AGC instructions, AGC and primary frequency modulation instructions being superimposed in both the same and opposite directions, AGC and primary frequency modulation instructions being superimposed in the same direction and blocking primary frequency modulation instructions in the opposite direction, and AGC and primary frequency modulation instructions being superimposed in the same direction and blocking AGC instructions in the opposite direction.

5. The primary frequency regulation control method for a wind farm power generation and storage system according to claim 4, characterized in that: Frequency regulation active power ΔP of primary frequency regulation in wind farm power distribution and storage system 调 The calculation method is as follows: In the formula, K f This represents the active power frequency regulation coefficient, with a value of 20; f is the calculated frequency of the secondary voltage; f n This indicates the rated frequency of the power grid, i.e., 50Hz; P n风 Indicates the rated capacity of the wind turbine assembly; P n储 This indicates the rated power of the energy storage system.

6. The primary frequency regulation control method for a wind farm power generation and storage system according to claim 4, characterized in that: In step 5, the actual output active power P of the wind turbine is... 风 It can be obtained through the wind turbine energy management platform or by accumulating the active power of the collection line; Actual operating power P of energy storage system 储 Energy is obtained through the energy management system of the energy storage system.

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