A receiving end power grid new energy station primary frequency modulation control method and system
By acquiring AGC commands and calculating reserved active power reserve commands in renewable energy power plants, the problem of insufficient frequency regulation caused by the randomness of power generation in renewable energy power plants is solved, the load increase capability is realized when the grid frequency drops, and the safety and stability of the grid are guaranteed.
Patent Information
- Application Number
- CN202211101696.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-09-09
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2042-09-09
AI Technical Summary
Due to the randomness and volatility of power generation at renewable energy power plants caused by weather, AGC power limiting commands cannot dynamically reserve backup power in real time, resulting in insufficient primary frequency regulation load increase capacity, which cannot effectively support grid frequency regulation and poses a risk of low-frequency load shedding.
By acquiring AGC instructions from renewable energy power plants, determining the power generation mode, calculating the reserved active power reserve instructions, and combining them with the primary frequency regulation power instructions, we can ensure that renewable energy power plants can reasonably allocate power generation under power-limited or free power generation modes, guarantee sufficient reserved active power reserves, and achieve primary frequency regulation load increase.
Ensure that renewable energy power plants have sufficient backup power when the grid frequency drops, support grid frequency regulation, and ensure the safe and stable operation of the receiving-end grid.
Smart Images

Figure CN115395585B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a primary frequency regulation control method and system for a new energy power station in a receiving-end power grid, belonging to the field of new energy power generation technology. Background Technology
[0002] The continuous growth in active power output from renewable energy sources and electricity imported from outside the region has led to a shrinking of traditional frequency regulation resources (thermal power, hydropower, etc.) with rotational inertia, resulting in significant changes in the power supply structure. The receiving-end power grid faces the risk of large-scale blackouts due to low-frequency load shedding caused by large power shortages. Therefore, there is an urgent need for renewable energy power plants to participate in grid frequency regulation and possess the capability for continuous low-frequency load increases. To alleviate the frequency regulation pressure on receiving-end power grids with a high proportion of renewable energy and enhance the grid-source coordination capability of renewable energy power plants, power grids in various regions are conducting research and application of primary frequency regulation for renewable energy power plants to enable rapid frequency response capabilities at the grid connection points of renewable energy power plants.
[0003] To maximize the power generation of renewable energy power plants, these plants operate in Maximum Power Tracking (MPPT) mode using full-power converters, lacking the capacity for continuous load increases. To address this, grid dispatch calculates AGC (Automatic Generation Control) power limiting commands based on the current actual power output of the power plants. This ensures that the output power of the renewable energy plants is lower than the maximum possible output power under the current environmental conditions, reserving some power reserves. These reserves are released when the grid frequency drops, supporting grid frequency regulation. However, because renewable energy power plants are significantly affected by weather, and their power generation is random and fluctuating, AGC power limiting commands cannot dynamically reserve power based on the environmental conditions of the power plants in real time, posing a risk of insufficient primary frequency regulation load increase capacity. Summary of the Invention
[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a method and system for primary frequency regulation control of new energy power stations in the receiving end of the power grid.
[0005] To solve the above-mentioned technical problems, the present invention provides a primary frequency regulation control method for renewable energy power plants in a receiving-end power grid, comprising:
[0006] Obtain AGC instructions from the new energy power station, and determine the power generation mode of the new energy power station based on the AGC instructions. The power generation mode of the new energy power station includes power limiting mode and free power generation mode.
[0007] Instructions to activate the active power reserve function of new energy power plants;
[0008] After receiving the active power reserve function activation instruction, it obtains the real-time adjustable upper limit and preset ratio of rated capacity of new energy power stations, and calculates the real-time reserved active power reserve instruction based on the real-time adjustable upper limit and preset ratio of rated capacity of new energy power stations.
[0009] Obtain the primary frequency regulation power command of the new energy power station, and the primary frequency regulation power command of the new energy power station shall not exceed the rated capacity of the preset ratio;
[0010] In the free power generation mode, the actual power generation of the new energy power station is obtained by superimposing the primary frequency regulation power command and the real-time active power reserve command.
[0011] In power-limited mode, the adequacy of the active power reserve of the new energy power station is determined based on the AGC instructions and the reserved active power reserve instructions.
[0012] If sufficient, the AGC command and the primary frequency regulation power command of the new energy power station will be superimposed to obtain the actual power generation of the new energy power station.
[0013] If the power reserve is insufficient, the reserved active power reserve command and the primary frequency regulation power command of the new energy power station will be superimposed to obtain the actual power generation of the new energy power station.
[0014] Furthermore, the step of obtaining AGC instructions from the new energy power station and determining the power generation mode of the new energy power station based on the AGC instructions includes:
[0015] When the AGC command of the new energy power station is less than the adjustable upper limit of the new energy power station, the new energy power station operates in power-limited mode.
[0016] When the AGC command of the new energy power station exceeds the adjustable upper limit of the new energy power station, the new energy power station operates in free power generation mode;
[0017] The adjustable upper limit of the new energy power station is calculated in real time based on the environmental conditions at the current time to obtain the maximum output power.
[0018] Furthermore, the calculation of real-time reserved active power reserve instructions includes:
[0019] The real-time reserved active power reserve instruction is obtained by subtracting the preset proportion of the rated capacity from the real-time adjustable upper limit of the new energy power station.
[0020] P 0'= P '- nP e ,
[0021] in, P 0' represents a real-time reserved active power reserve instruction. P 'This is the adjustable upper limit of the real-time power generation capacity of new energy power plants.' n For the preset ratio, nP e Not less than the primary frequency regulation power command Δ of the new energy power station P ,P e This indicates the rated power of the new energy power station.
[0022] Furthermore, the primary frequency regulation power command of the new energy power station is calculated using the following formula:
[0023] ;
[0024] In the formula, Δ P For the primary frequency regulation power command of the new energy power station, ƒ L and ƒ H These are the low-frequency dead zone and the high-frequency dead zone, respectively, and ƒ L =50-ƒ d , ƒ H =50+ƒ d , ƒ d This is a frequency modulation dead zone. P e For the rated power of new energy power stations, f N The rated frequency of the power grid system. δ The adjustment rate, f This is the actual frequency of the power grid.
[0025] Furthermore, the step of determining whether the reserved active power reserve of the new energy power station is sufficient based on the AGC command and the reserved active power reserve command includes:
[0026] The difference is obtained by subtracting the reserved active power reserve instruction from the AGC instruction of the new energy power station.
[0027] If the difference is negative, it indicates that there is enough.
[0028] If the difference is not negative, it indicates that the difference is insufficient.
[0029] A primary frequency regulation control system for a receiving-end power grid renewable energy power station includes:
[0030] The judgment module is used to obtain AGC instructions from the new energy power station and determine the power generation mode of the new energy power station based on the AGC instructions. The power generation mode of the new energy power station includes power limiting mode and free power generation mode.
[0031] The determination module is used to determine the activation instructions for the active power reserve function of new energy power plants;
[0032] The calculation module is used to receive the active power reserve function activation instruction, obtain the real-time adjustable upper limit and the rated capacity of the new energy power station according to the real-time adjustable upper limit and the rated capacity of the preset ratio, and calculate the real-time reserved active power reserve instruction according to the real-time adjustable upper limit and the rated capacity of the new energy power station.
[0033] Obtain the primary frequency regulation power command of the new energy power station, and the primary frequency regulation power command of the new energy power station shall not exceed the rated capacity of the preset ratio;
[0034] The first processing module is used to calculate the actual power generation of the new energy power station by superimposing the primary frequency regulation power command and the real-time active power reserve command in the free power generation mode.
[0035] The second processing module is used to determine whether the reserved active power reserve of the new energy power station is sufficient in power-limited mode, based on the AGC instructions and reserved active power reserve instructions of the new energy power station.
[0036] If sufficient, the AGC command and the primary frequency regulation power command of the new energy power station will be superimposed to obtain the actual power generation of the new energy power station.
[0037] If the power reserve is insufficient, the actual power generation of the renewable energy power station will be calculated by combining the reserved active power reserve command and the primary frequency regulation power command of the renewable energy power station.
[0038] A computer-readable storage medium storing one or more programs, said one or more programs including instructions that, when executed by a computing device, cause the computing device to perform any of the methods described.
[0039] A computing device, comprising,
[0040] One or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs include instructions for performing any of the methods described.
[0041] The beneficial effects achieved by this invention are as follows:
[0042] This invention can ensure that new energy power plants reserve sufficient backup power, achieve frequency regulation and load increase when the grid frequency drops, support grid frequency regulation, and ensure the safe and stable operation of the receiving-end grid. Attached Figure Description
[0043] Figure 1 This is a schematic diagram illustrating the AGC control mode judgment for new energy power stations;
[0044] Figure 2 This is a schematic diagram of power command for new energy power plants;
[0045] Figure 3 This is a schematic diagram illustrating the calculation of primary frequency regulation power commands for new energy power plants;
[0046] Figure 4 This is a schematic diagram for judging whether the reserve of active power at a new energy power station is sufficient;
[0047] Figure 5 This is a schematic diagram of the primary frequency regulation control for the reserved active power reserve in a new energy power station. Detailed Implementation
[0048] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.
[0049] The present invention provides a primary frequency regulation control method for a receiving-end power grid renewable energy power station, comprising:
[0050] Step 1: See Figure 1 Determine the AGC mode of the new energy power station;
[0051] Step 2: See Figure 2 The new energy power station puts into active power reserve function and calculates and reserves active power reserve instructions;
[0052] Step 3: See Figure 3 After the primary frequency regulation of a new energy power station is put into operation, the primary frequency regulation power command of the new energy power station is calculated when the frequency difference at the grid connection point exceeds the dead zone.
[0053] Step 4: See Figure 5 When a new energy power station operates in free power generation mode, the AGC command / reserved active power reserve command is blocked during primary frequency regulation. The actual generated power is superimposed on the primary frequency regulation power command.
[0054] Step 5: See Figure 4 To determine whether the active power reserve of the new energy power station is sufficient, a power command is selected if the active power reserve of the new energy power station is sufficient.
[0055] Step 6: See Figure 5 When the power generation station operates under the power-limited mode, the power of the station is controlled by the reserved active power reserve command when the active power reserve function is activated and the power limit of AGC is insufficient. When the primary frequency regulation is activated, the reserved active power reserve command is blocked and the actual generated power is superimposed on the primary frequency regulation power command.
[0056] In this embodiment, step 1, determining the AGC mode of the renewable energy power station, specifically involves: the AGC operation mode of the renewable energy power station can be divided into free generation mode and power-limited mode. In power-limited mode, the power station has the capacity to increase load. When the AGC command of the renewable energy power station is less than the adjustable upper limit of the power station, the power station operates in power-limited mode; when the AGC command of the renewable energy power station is greater than the adjustable upper limit, the power station operates in free generation mode. The adjustable upper limit of the renewable energy power station is calculated in real time based on the current environmental conditions (wind speed, sunlight) of the power station, determining the maximum possible output power.
[0057] In this embodiment, step 2 involves activating the active power reserve function at the renewable energy power station and calculating the reserved active power reserve command. Specifically, if the renewable energy power station activates the active power reserve function, it calculates the reserved active power reserve command. The reserved active power reserve command is based on the adjustable upper limit of the renewable energy power station minus a certain percentage of the rated capacity, i.e., P0'=P'-б%Pe, where P' is the current adjustable upper limit of the renewable energy power station, and б%Pe is greater than the primary frequency regulation power command. This means dynamically reserving sufficient backup power.
[0058] In this embodiment, after the primary frequency regulation of the selected renewable energy power station is put into operation in step 3, when the frequency at the grid connection point exceeds the primary frequency regulation dead zone, a primary frequency regulation action is triggered and the load command of the renewable energy power station is calculated. Specifically:
[0059] Calculate the primary frequency regulation load command:
[0060] ;
[0061] In the formula: ƒ L =50-ƒ d , ƒ H =50+ƒ d , ƒ d The primary frequency modulation dead zone (Hz), Δ P This is the primary frequency regulation power command (MW). P e Rated power (MW) for new energy power plants. f N The rated frequency (Hz) of the power grid system. δ The droop rate (%) is the load increase control command triggered when the actual grid frequency is lower than that of the FL renewable energy power station; and the load decrease control command triggered when the actual grid frequency is higher than that of the FH renewable energy power station.
[0062] The primary frequency modulation dead zone is the insensitive area of the primary frequency modulation control system to frequency differences near the rated frequency.
[0063] The primary frequency regulation limit is the maximum load value of the primary frequency regulation load response;
[0064] The droop rate reflects the slope of the primary frequency modulation static characteristic curve and is the ratio of the per-unit value of the system frequency change to the per-unit value of the active power change.
[0065] In this embodiment, the new energy power station described in step 4 operates in free power generation mode. During a primary frequency regulation operation, the AGC command / reserved active power reserve command is locked, and the actual generated power is superimposed on the primary frequency regulation power command. Specifically: if the new energy power station does not have active power reserve functionality, it operates in free power generation mode. During a primary frequency regulation operation, the AGC command is locked, ensuring that the new energy power station's load command tracks and remains unchanged based on the instantaneous value of the actual generated power at the time of the primary frequency regulation operation. This load command is then superimposed on the primary frequency regulation load command to calculate the total load command. After the primary frequency regulation is reset, the AGC command is executed again. If the new energy power station has active power reserve functionality, its generated power tracks the reserved active power reserve command. During a primary frequency regulation operation, the new energy power station's load command tracks and remains unchanged based on the instantaneous value of the actual generated power at the time of the primary frequency regulation operation. This load command is then superimposed on the primary frequency regulation power command to calculate the total load command. After the primary frequency regulation is reset, the reserved active power reserve command is executed again.
[0066] In this embodiment, step 5, determining whether the active power reserve of the renewable energy power station is sufficient, and selecting a power command indicating sufficient active power reserve, specifically involves subtracting the reserved active power reserve command from the AGC power limit command to determine whether the reserved active power reserve of the renewable energy power station is sufficient. If the value is positive, it indicates that the AGC power limit command is too large, and the renewable energy power station is at risk of insufficient primary frequency regulation load increase capability. If the value is negative, it indicates that the AGC power limit command is sufficient, and the renewable energy power station has primary frequency regulation load increase capability. When the reserved active power reserve is sufficient according to the AGC power limit command (i.e., the value is less than 0), the AGC power limit command is selected to control the power generation of the renewable energy power station; when the reserved active power reserve is insufficient according to the AGC power limit command (i.e., the value is greater than 0), the reserved active power reserve command is selected.
[0067] In this embodiment, the renewable energy power station operates under the power-limited mode described in step 6. When the active power reserve function is activated and the AGC power limit is insufficient, the power station power is controlled by a reserved active power reserve command. During the primary frequency regulation operation, the reserved active power reserve command is blocked, and the actual generated power is superimposed on the primary frequency regulation power command. Specifically: if the renewable energy power station does not activate the active power reserve function, the power generation of the renewable energy power station tracks the AGC power limit command. During the primary frequency regulation operation, the load command of the renewable energy power station tracks the instantaneous value of the actual generated power at the time of the primary frequency regulation operation and remains unchanged. The load command is calculated by superimposing it with the primary frequency regulation power command. After the primary frequency regulation is reset, the AGC power limit command is executed again. If the renewable energy power station activates its active power reserve function (which can be activated by grid dispatch or controlled by the renewable energy power station itself), it determines whether the reserved active power reserve is sufficient under AGC power-limited operation. If the AGC active power reserve is insufficient, the renewable energy power station's power generation tracks the reserved active power reserve command. During primary frequency regulation, the renewable energy power station's load command tracks and remains unchanged the instantaneous value of the actual generated power at the moment of primary frequency regulation. This load command is then superimposed with the primary frequency regulation power command to calculate the total load command. After primary frequency regulation resets, the reserved active power reserve command is executed again. This invention ensures that renewable energy power stations reserve sufficient reserve power, enabling primary frequency regulation load increase when grid frequency drops, supporting grid frequency regulation, and ensuring the safe and stable operation of the receiving-end grid.
[0068] Accordingly, the present invention also provides a primary frequency regulation control system for a receiving-end power grid renewable energy power station, comprising:
[0069] The judgment module is used to obtain AGC instructions from the new energy power station and determine the power generation mode of the new energy power station based on the AGC instructions. The power generation mode of the new energy power station includes power limiting mode and free power generation mode.
[0070] The determination module is used to determine the activation instructions for the active power reserve function of new energy power plants;
[0071] The calculation module is used to receive the active power reserve function activation instruction, obtain the real-time adjustable upper limit and the rated capacity of the new energy power station according to the real-time adjustable upper limit and the rated capacity of the preset ratio, and calculate the real-time reserved active power reserve instruction according to the real-time adjustable upper limit and the rated capacity of the new energy power station.
[0072] Obtain the primary frequency regulation power command of the new energy power station, and the primary frequency regulation power command of the new energy power station shall not exceed the rated capacity of the preset ratio;
[0073] The first processing module is used to calculate the actual power generation of the new energy power station by superimposing the primary frequency regulation power command and the real-time active power reserve command in the free power generation mode.
[0074] The second processing module is used to determine whether the reserved active power reserve of the new energy power station is sufficient in power-limited mode, based on the AGC instructions and reserved active power reserve instructions of the new energy power station.
[0075] If sufficient, the AGC command and the primary frequency regulation power command of the new energy power station will be superimposed to obtain the actual power generation of the new energy power station.
[0076] If the power reserve is insufficient, the actual power generation of the renewable energy power station will be calculated by combining the reserved active power reserve command and the primary frequency regulation power command of the renewable energy power station.
[0077] Accordingly, the present invention also provides a computer-readable storage medium for storing one or more programs, said one or more programs including instructions that, when executed by a computing device, cause the computing device to perform any of the methods described.
[0078] Accordingly, the present invention also provides a computing device, comprising,
[0079] One or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs include instructions for performing any of the methods described.
[0080] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.
[0081] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.
[0082] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.
[0083] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.
[0084] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.
Claims
1. A primary frequency regulation control method for a receiving-end power grid renewable energy power station, characterized in that, include: Obtain AGC instructions from the new energy power station, and determine the power generation mode of the new energy power station based on the AGC instructions. The power generation mode of the new energy power station includes power limiting mode and free power generation mode. Instructions to activate the active power reserve function of new energy power plants; After receiving the active power reserve function activation instruction, it obtains the real-time adjustable upper limit and preset ratio of rated capacity of new energy power stations, and calculates the real-time reserved active power reserve instruction based on the real-time adjustable upper limit and preset ratio of rated capacity of new energy power stations. Obtain the primary frequency regulation power command of the new energy power station, and the primary frequency regulation power command of the new energy power station shall not exceed the rated capacity of the preset ratio; In free generation mode, the actual power generation of the new energy power station is calculated by superimposing the primary frequency regulation power command and the real-time active power reserve command. This includes: if the new energy power station does not have active power reserve function, the new energy power station generates power freely. When the primary frequency regulation is activated, the AGC command is blocked, so that the load command of the new energy power station tracks the instantaneous value of the actual power generation at the moment of the primary frequency regulation and remains unchanged. The total load command is calculated by superimposing it with the primary frequency regulation load command. The AGC command is executed again after the primary frequency regulation is reset. If the new energy power station has active power reserve function, the power generation of the new energy power station tracks the reserved active power reserve command. When the primary frequency regulation is activated, the load command of the new energy power station tracks the instantaneous value of the actual power generation at the moment of the primary frequency regulation and remains unchanged. The total load command is calculated by superimposing it with the primary frequency regulation power command. The reserved active power reserve command is executed again after the primary frequency regulation is reset. In power limiting mode, if the renewable energy power station does not have active power reserve enabled, its power generation follows the AGC power limiting command. During primary frequency regulation, the load command of the renewable energy power station tracks and remains unchanged based on the instantaneous value of the actual generated power at the time of the primary frequency regulation. This load command is then superimposed with the primary frequency regulation power command to calculate the total load command. After the primary frequency regulation resets, the AGC power limiting command is executed again. If the renewable energy power station has active power reserve enabled, the adequacy of the reserved active power reserve is determined based on the renewable energy power station's AGC command and reserved active power reserve command. If sufficient, the AGC command and the primary frequency regulation power command of the new energy power station will be superimposed to obtain the actual power generation of the new energy power station. If insufficient, the power generation of the new energy power station tracks the reserved active power reserve instruction. When the primary frequency regulation is activated, the load instruction of the new energy power station tracks the instantaneous value of the actual generated power at the moment of the primary frequency regulation and keeps it unchanged. The total load instruction is calculated after being superimposed with the primary frequency regulation power instruction. The reserved active power reserve instruction is executed again after the primary frequency regulation is reset.
2. The primary frequency regulation control method for receiving-end power grid renewable energy power stations according to claim 1, characterized in that, The calculation of real-time reserved active power reserve instructions includes: The real-time reserved active power reserve instruction is obtained by subtracting the preset proportion of the rated capacity from the real-time adjustable upper limit of the new energy power station. P 0'= P '- nP e , in, P 0' represents a real-time reserved active power reserve instruction. P 'This is the adjustable upper limit of the real-time power generation capacity of new energy power plants.' n For the preset ratio, nP e Not less than the primary frequency regulation power command Δ of the new energy power station P , P e This indicates the rated power of the new energy power station.
3. The primary frequency regulation control method for receiving-end power grid renewable energy power stations according to claim 1, characterized in that, The process of obtaining AGC commands from the new energy power station and determining the power generation mode of the new energy power station based on the AGC commands includes: When the AGC command of the new energy power station is less than the adjustable upper limit of the new energy power station, the new energy power station operates in power-limited mode. When the AGC command of the new energy power station exceeds the adjustable upper limit of the new energy power station, the new energy power station operates in free power generation mode; The adjustable upper limit of the new energy power station is calculated in real time based on the environmental conditions at the current time to obtain the maximum output power.
4. The primary frequency regulation control method for receiving-end power grid renewable energy power stations according to claim 1, characterized in that, The primary frequency regulation power command of the new energy power station is calculated using the following formula. ; In the formula, Δ P For the primary frequency regulation power command of the new energy power station, ƒ L and ƒ H These are the low-frequency dead zone and the high-frequency dead zone, respectively, and ƒ L =50-ƒ d , ƒ H =50+ƒ d , ƒ d This is a frequency modulation dead zone. P e For the rated power of new energy power stations, f N The rated frequency of the power grid system. δ The adjustment rate, f This is the actual frequency of the power grid.
5. The primary frequency regulation control method for receiving-end power grid renewable energy power stations according to claim 1, characterized in that, The step of determining whether the reserved active power reserve of a new energy power station is sufficient based on the AGC command and the reserved active power reserve command of the new energy power station includes: The difference is obtained by subtracting the reserved active power reserve instruction from the AGC instruction of the new energy power station. If the difference is negative, it indicates that there is enough. If the difference is not negative, it indicates that the difference is insufficient.
6. A primary frequency regulation control system for a receiving-end power grid renewable energy power station, characterized in that, include: The judgment module is used to obtain AGC instructions from the new energy power station and determine the power generation mode of the new energy power station based on the AGC instructions. The power generation mode of the new energy power station includes power limiting mode and free power generation mode. The determination module is used to determine the activation instructions for the active power reserve function of new energy power plants; The calculation module is used to receive the active power reserve function activation instruction, obtain the real-time adjustable upper limit and the rated capacity of the new energy power station according to the real-time adjustable upper limit and the rated capacity of the preset ratio, and calculate the real-time reserved active power reserve instruction according to the real-time adjustable upper limit and the rated capacity of the new energy power station. Obtain the primary frequency regulation power command of the new energy power station, and the primary frequency regulation power command of the new energy power station shall not exceed the rated capacity of the preset ratio; The first processing module is used to calculate the actual power generation of a new energy power station in free generation mode by superimposing the primary frequency regulation power command and the real-time active power reserve command. This includes: if the new energy power station does not have active power reserve enabled, and it generates power freely, the AGC command is blocked during primary frequency regulation, ensuring that the load command tracks the instantaneous value of the actual power generation at the moment of primary frequency regulation and remains unchanged. This load command is then superimposed with the primary frequency regulation load command to calculate the total load command. The AGC command is executed again after the primary frequency regulation is reset. If the new energy power station has active power reserve enabled, its power generation tracks the reserved active power reserve command. During primary frequency regulation, the load command tracks the instantaneous value of the actual power generation at the moment of primary frequency regulation and remains unchanged. This load command is then superimposed with the primary frequency regulation power command to calculate the total load command. The reserved active power reserve command is executed again after the primary frequency regulation is reset. The second processing module is used in power-limiting mode. If the renewable energy power station does not have active power reserve enabled, the power generation of the renewable energy power station tracks the AGC power-limiting command. When the primary frequency regulation is activated, the load command of the renewable energy power station tracks and remains unchanged the instantaneous value of the actual generated power at the time of the primary frequency regulation. This load command is then superimposed with the primary frequency regulation power command to calculate the total load command. After the primary frequency regulation is reset, the AGC power-limiting command is executed again. If the renewable energy power station has active power reserve enabled, the module determines whether the reserved active power reserve of the renewable energy power station is sufficient based on the AGC command and the reserved active power reserve command. If sufficient, the AGC command and the primary frequency regulation power command of the new energy power station will be superimposed to obtain the actual power generation of the new energy power station. If insufficient, the power generation of the new energy power station tracks the reserved active power reserve instruction. When the primary frequency regulation is activated, the load instruction of the new energy power station tracks the instantaneous value of the actual generated power at the moment of the primary frequency regulation and keeps it unchanged. The total load instruction is calculated after being superimposed with the primary frequency regulation power instruction. The reserved active power reserve instruction is executed again after the primary frequency regulation is reset.
7. A computer-readable storage medium for storing one or more programs, characterized in that, The one or more programs include instructions that, when executed by a computing device, cause the computing device to perform any of the methods according to claims 1 to 5.
8. A computing device, characterized in that, include, One or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for performing any of the methods according to claims 1 to 5.
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