A primary frequency modulation and AGC coordination system for grid-connected point electric parameter acquisition

Abstract

The application relates to the field of grid-connected power frequency modulation and discloses a primary frequency modulation and AGC coordination system for collecting electric parameters at a grid-connected point, so as to solve the problems of insufficient coordination and low regulation precision of a primary frequency modulation system and an AGC system in the prior art.The system is built on a stable carrier of basic hardware modules, and the collected data are processed and integrated and analyzed by a core system module to determine whether the grid frequency exceeds a dead zone, so as to coordinate the control authority between the primary frequency modulation system and the AGC system, quickly complete the coordination calculation between the primary frequency modulation system and the AGC system, improve the coordination efficiency between the primary frequency modulation system and the AGC system, calculate and correct the frequency modulation precision of the primary frequency modulation system and the AGC system, ensure that the regulation precision meets the requirement that the stable time deviation is less than or equal to + / -1% of the rated active power, further improve the regulation precision between the primary frequency modulation system and the AGC system, and send an alarm to remind the operation and maintenance personnel when the regulation precision error is too large.

Description

Technical Field

[0001] This invention relates to the field of grid-connected power frequency regulation technology, and in particular to a primary frequency regulation and AGC coordination system for collecting electrical parameters at the grid connection point. Background Technology

[0002] Grid frequency is a crucial indicator of power quality, reflecting the balance between active power generation and load. Ensuring grid frequency stability benefits the safety and economic efficiency of equipment at multiple levels, including power generation, grid, and load. Primary frequency regulation and AGC (Automatic Generation Control) both play important roles in grid frequency control. Primary frequency regulation utilizes the droop characteristics of generator speed governors to adjust generator power when frequency deviations are large, thereby improving the imbalance between power generation and consumption and reducing frequency deviation. AGC involves the dispatching agency issuing power commands to generator sets to regulate their active power output, achieving the goal of reducing frequency deviation and tie-line power transmission deviation.

[0003] Regarding the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: there is insufficient coordination and low regulation accuracy between the primary frequency regulation system and the AGC system in traditional technologies, which in turn leads to an inability to respond quickly when the power grid frequency fluctuates, affecting the power supply reliability and stability of the power system. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the existing technology has the disadvantages of insufficient coordination and low adjustment accuracy between the primary frequency regulation system and the AGC system. To this end, we propose a primary frequency regulation and AGC coordination system for grid connection point electrical parameter acquisition.

[0005] To achieve the above objectives, this application adopts the following technical solution: a primary frequency modulation and AGC coordination system for grid connection point electrical parameter acquisition, comprising: The basic hardware module is used to accurately collect electrical parameters at the grid connection point, providing real-time, reliable, and secure underlying support for the coordinated control of the primary frequency regulation system and the AGC system; The core system module is used to make real-time judgments on the operating status of wind turbines, realize the coordination of control authority between the primary frequency regulation system and the AGC system, and integrate multi-dimensional data from the grid side, wind turbine side, and AGC side as the basis for frequency regulation decisions. The feedback correction module is used to collect the actual active power output of the wind turbine after adjustment and the change of grid frequency, determine whether there is a deviation between the actual output and the target output, recalculate the adjustment command and issue it, forming a dynamic closed loop, and improving the coordination accuracy of the core system modules. The system protection module is used to ensure continuous system operation, avoid system interruption, improve system stability and security, provide backup equipment support for the system, and ensure uninterrupted data acquisition and communication.

[0006] Preferably, the basic hardware modules include a grid-connected monitoring and control device, a core server, a network switch, a front-end workstation, and a network security monitoring device; The grid-connected monitoring and control device is used to collect current and voltage signals at the grid connection point in real time, and calculate the real-time power and grid frequency at the grid connection point based on the collected signals, providing a grid data foundation for the core system modules. The core server is used to collect data from grid-connected monitoring and control devices and wind turbine status data, and to communicate with the AGC system and wind turbine energy management platform. It serves as the core carrier for data processing and instruction calculation of the core system modules. The front-end workstation is used to handle human-computer interaction functions, supporting users to configure frequency modulation parameters, view system operating status, export data reports, forward instructions and feedback data from the core server, and enable staff to intuitively see and set data through the front screen; The network security monitoring device is used to connect to the primary frequency modulation and AGC coordination system, monitor network access behavior and data transmission security, ensure that system data is not leaked, and set user permissions so that system instructions cannot be modified when staff do not enter the correct password, thus ensuring the safe operation of the system. Network switches are used to build internal communication networks within a system, ensuring the real-time performance and stability of data transmission between core servers, front-end workstations, network-connected monitoring and control devices, and network security monitoring devices.

[0007] Preferably, the core system modules include a data acquisition module and a control module. The data acquisition module is used to collect data to provide data support for the control module. It mainly collects electrical parameters at the grid connection point, wind turbine status, and AGC commands. The control module, based on the data collected by the data acquisition module, controls the coordinated switching between the primary frequency regulation and AGC coordination system according to the power generation mode of the wind turbine.

[0008] Preferably, the feedback correction module includes a deviation calculation module and a closed-loop correction module. The deviation calculation module is used to calculate the deviation of a single wind turbine and the total deviation of the site, monitor the execution effect of frequency regulation commands, and determine whether the regulation accuracy meets the requirement of deviation ≤ ±1% of rated active power when stable. It is also equipped with an alarm device. When the deviation calculation is too large, the frequency regulation target deviation value is recalculated and an alarm is pushed to the front-end workstation to remind the operation and maintenance personnel to pay attention. The closed-loop correction module is used to correct the deviation calculated by the deviation calculation module. Through fine-tuning correction commands, the rated output is gradually corrected to ensure that the adjustment accuracy meets the requirement of deviation ≤ ±1% of rated active power when stable.

[0009] Preferably, the system protection module includes a dual-machine hot standby module and a verification module. The dual-machine hot standby module adopts a primary and secondary architecture, with backup equipment for the core server, front-end workstation, grid-connected monitoring and control device and network switch in the basic hardware module. This ensures that the primary frequency regulation and AGC coordination system can operate without interruption or failure during long-term operation, while meeting the power system's safety deployment requirements and supporting the system's stable operation 24 / 7. The verification module is used to extract its own operating data in real time during system operation and compare it with the standard values ​​in the database to ensure that all technical indicators of the system meet the requirements of national standards and regional power grid rules, and to generate a compliance test report after the project is completed.

[0010] Preferably, the data acquisition module includes a multi-source data acquisition module, a parameter configuration module, and an operating mode recognition module; The multi-source data acquisition module collects grid connection point current and voltage signals through the grid-connected measurement and control device, calculates real-time power and grid frequency, collects core data of a single wind turbine in real time through the wind turbine energy management platform, and collects AGC side data through the communication interface with the AGC system. In addition, it performs noise reduction, filtering and synchronization processing on the collected data to synchronize multiple data. The parameter configuration module is designed to adapt to the differentiated requirements of power grids in different regions. Through the built-in parameter configuration interface, operators can set key parameters. The operation mode recognition module is used to determine the operation mode of the wind turbine by combining the real-time power of the grid connection point and the wind turbine's operating status, and by comparing the real-time power of the grid connection point with the maximum power curve of the wind turbine.

[0011] Preferably, the control module includes a frequency status judgment module, an AGC coordination control module, and a fan control module; The frequency status judgment module is used to compare the power grid frequency with the preset dead zone in real time to determine whether the power grid frequency exceeds the dead zone. At the same time, the frequency status judgment module itself has a signal verification mechanism to avoid false signal transmission through continuous sampling. The AGC coordination control module is used to realize the coordinated control of the primary frequency regulation and AGC coordination system, execute the core logic of positive superposition and reverse blocking, calculate the final total power output target of the station and allocate it to individual wind turbines. The wind turbine control module receives coordination commands from the AGC coordination control module, adjusts the active power output of the wind turbine, and ensures the safe operation of the wind turbine to prevent it from disconnecting from the grid or shutting down.

[0012] Preferably, the primary frequency regulation and AGC coordination system also includes a frequency regulation curve unit for participating in rapid frequency regulation when the wind turbine is in different power generation modes; When the wind turbine is in the maximum power free generation state, when the grid frequency rises, the primary frequency regulation system controls the wind turbine to quickly reduce active power output through the energy management platform according to the frequency regulation curve unit, implements power limiting control on the wind turbine, and reduces the overall power plant output; when the grid frequency drops, it can quickly control the wind turbine to increase active power output, increase the overall power plant processing, thereby achieving the purpose of primary frequency regulation control. When the wind turbine is operating under limited power, and the grid frequency decreases, the primary frequency regulation system controls the wind turbine to rapidly increase active power output through the energy management platform according to the frequency regulation curve unit, thereby increasing the overall power output of the wind farm and achieving the frequency regulation control target. When the grid frequency increases, the primary frequency regulation system quickly controls the wind turbine to reduce active power output according to the frequency regulation curve unit, thereby reducing the overall power output of the wind farm and achieving the primary frequency regulation control target.

[0013] Preferably, it also includes a logic switching module for interlocking switching between the primary frequency modulation system and the AGC system when the frequency exceeds the dead zone range, provided that: When the frequency exceeds the dead zone range; the frequency modulation interlock signal is 1, the primary frequency modulation system starts to issue instructions, the AGC system locks its own function of issuing scheduling instructions, and the wind turbine receives and executes the instructions of the primary frequency modulation system. When the frequency is within the dead zone, i.e. when the frequency modulation blocking signal is 0, the primary frequency modulation system stops issuing commands, the AGC system resumes its own function of issuing scheduling commands, and the wind turbine receives and executes the AGC system commands.

[0014] Preferably, the primary frequency modulation system and the AGC system are positively superimposed and negatively interlocked, with the specific logic as follows: When the frequency f ≥ (50 + dead zone setpoint) Hz and the AGC system command remains unchanged, the primary frequency regulation system first calculates the frequency regulation target value P1 and allocates it to each wind turbine. During the frequency regulation period, when the primary frequency regulation system detects that the AGC system command △Pagc is a load reduction command, and both the AGC system command and the primary frequency regulation system command are load reduction commands, they are positively superimposed. The primary frequency regulation and AGC coordination system issues P1 + △Pagc to achieve positive superposition. During the frequency regulation period, when the primary frequency regulation system detects that the AGC system command △Pagc is a load increase command, and the AGC system command and the primary frequency regulation system command have opposite adjustment directions, they are reversely locked. The primary frequency regulation system allocates P1 to each wind turbine to achieve reverse locking. When the frequency f ≤ (50 - dead zone setpoint) Hz and the AGC system command remains unchanged, the primary frequency regulation system first calculates the frequency regulation target value P2 and allocates it to each wind turbine. During frequency regulation, when the primary frequency regulation system detects that the AGC system command △Pagc is a load increase command, and both the AGC system command and the primary frequency regulation system command are load increase commands, they are positively superimposed. The primary frequency regulation and AGC coordination system issues P2 + △Pagc to achieve positive superposition. During frequency regulation, when the primary frequency regulation system detects that the AGC system command △Pagc is a load decrease command, and the AGC system command and the primary frequency regulation system command have opposite adjustment directions, they are reversely locked. The primary frequency regulation control system allocates P2 to each wind turbine to achieve reverse locking.

[0015] The technical effects and advantages of this invention are as follows: In this invention, a stable platform for system operation is built by collecting grid-connected current and voltage signals and wind turbine status data through basic hardware modules. The core system module performs noise reduction, filtering, synchronization processing, and integrated analysis on the collected multi-dimensional data from the grid side, wind turbine side, and AGC side. By determining whether the grid frequency exceeds the dead zone, the control permissions between the primary frequency regulation system and the AGC system are coordinated, quickly completing the coordination calculation between them. This improves the regulation accuracy between the primary frequency regulation system and the AGC system. The frequency regulation accuracy of the primary frequency regulation system and the AGC system is calculated and corrected to ensure that the regulation accuracy meets the requirement of stable deviation ≤ ±1% of rated active power. An alarm is issued when the regulation accuracy error is too large, alerting maintenance personnel. By setting up a primary and backup architecture, a backup device can be switched in a timely manner when a device in the basic hardware module fails, ensuring long-term stable system operation, meeting power system safety deployment requirements, generating a compliance test report, and reducing the later maintenance costs of the primary frequency regulation and AGC coordination system. Attached Figure Description

[0016] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts: Figure 1 This is a flowchart of the overall program of the primary frequency regulation and AGC coordination system for collecting grid connection point electrical parameters according to the present invention. Detailed Implementation

[0017] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0018] To address the technical problems of insufficient coordination and low regulation accuracy between the primary frequency modulation system and the AGC system in existing technologies, such as... Figure 1 As shown, the following preferred technical solutions are provided: A primary frequency modulation and AGC coordination system for grid connection point electrical parameter acquisition includes: The basic hardware module is used to accurately collect electrical parameters at the grid connection point, providing real-time, reliable, and secure underlying support for the coordinated control of the primary frequency regulation system and the AGC system. It serves as the physical carrier for system operation, the source of data acquisition, the channel for command transmission, and the guarantee of safety and compliance. The core system module is used to make real-time judgments on the operating status of wind turbines, realize the coordination of control authority between the primary frequency regulation system and the AGC system, and integrate multi-dimensional data from the grid side, wind turbine side, and AGC side as the basis for frequency regulation decisions. The feedback correction module is used to collect the actual active power output of the wind turbine after adjustment and the change of grid frequency, determine whether there is a deviation between the actual output and the target output, recalculate the adjustment command and issue it, forming a dynamic closed loop, and improving the coordination accuracy of the core system modules. The system protection module is used to ensure continuous system operation, avoid system interruption, improve system stability and security, provide backup equipment support for the system, and ensure uninterrupted data acquisition and communication.

[0019] The basic hardware modules include grid-connected monitoring and control devices, core servers, network switches, front-end workstations, and network security monitoring devices; The grid-connected monitoring and control device is used to collect current and voltage signals at the grid connection point in real time, and calculate the real-time power and grid frequency at the grid connection point based on the collected signals, providing a grid data foundation for the core system modules. The core server is used to collect data from grid-connected monitoring and control devices and wind turbine status data, and to communicate with the AGC system and wind turbine energy management platform. It serves as the core carrier for data processing and instruction calculation of the core system modules. The front-end workstation is used to handle human-computer interaction functions, supporting users to configure frequency modulation parameters, view system operating status, export data reports, forward instructions and feedback data from the core server, and enable staff to intuitively see and set data through the front screen; The network security monitoring device is used to connect to the primary frequency modulation and AGC coordination system, monitor network access behavior and data transmission security, ensure that system data is not leaked, and set user permissions so that system instructions cannot be modified when staff do not enter the correct password, thus ensuring the safe operation of the system. Network switches are used to build internal communication networks within a system, ensuring the real-time performance and stability of data transmission between core servers, front-end workstations, network-connected monitoring and control devices, and network security monitoring devices.

[0020] The core system modules include a data acquisition module and a control module. The data acquisition module is used to collect data to provide data support for the control module. It mainly collects electrical parameters at the grid connection point, wind turbine status, and AGC commands. The control module, based on the data collected by the data acquisition module, controls the coordinated switching between the primary frequency regulation and AGC coordination system according to the power generation mode of the wind turbine.

[0021] The feedback correction module includes a deviation calculation module and a closed-loop correction module. The deviation calculation module is used to calculate the deviation of a single wind turbine and the total deviation of the site, monitor the execution effect of frequency regulation commands, and determine whether the regulation accuracy meets the requirement of deviation ≤ ±1% of rated active power when stable. It is also equipped with an alarm device. When the deviation calculation is too large, the frequency regulation target deviation value is recalculated and an alarm is pushed to the front-end workstation to remind the operation and maintenance personnel to pay attention. The closed-loop correction module is used to correct the deviation calculated by the deviation calculation module. Through fine-tuning correction commands, it gradually corrects the rated output to ensure that the adjustment accuracy meets the requirement of deviation ≤ ±1% of rated active power when stable. Single fan deviation = Actual fan output - Fan distribution command value; Total deviation of the station = Actual total output of the station - Total target value of the station; If the total deviation is ≤ ±1% of the rated active power and remains stable for 3 seconds, the adjustment is deemed to be in compliance; if the total deviation is > ±1% of the rated active power or remains unstable for 10 seconds, the correction mechanism is triggered.

[0022] The system protection module includes a dual-machine hot standby module and a verification module. The dual-machine hot standby module adopts a primary and secondary architecture, with backup equipment for the core server, front-end workstation, grid-connected monitoring and control device and network switch in the basic hardware module. This ensures that the primary frequency regulation and AGC coordination system can operate without interruption or failure during long-term operation, while meeting the power system's safety deployment requirements and supporting the system's stable operation 24 / 7. The verification module is used to extract its own operating data in real time during system operation, compare it with the standard values ​​in the database, ensure that all technical indicators of the system meet the requirements of national standards and regional power grid rules, and generate a compliance test report after the project is completed. The core server and front-end workstation both use domestically produced operating systems to avoid security vulnerabilities of foreign systems and prevent network attacks. All technical indicators in the system meet the requirements of national standards and regional power grid regulations, ensuring that the dead zone range of the frequency modulation frequency complies with national standards and industry specifications.

[0023] The data acquisition module includes a multi-source data acquisition module, a parameter configuration module, and an operating mode recognition module; The multi-source data acquisition module collects grid connection point current and voltage signals through the grid-connected measurement and control device, calculates real-time power and grid frequency, collects core data of a single wind turbine in real time through the wind turbine energy management platform, and collects AGC side data through the communication interface with the AGC system. In addition, it performs noise reduction, filtering and synchronization processing on the collected data to synchronize multiple data. The parameter configuration module is designed to adapt to the differentiated requirements of power grids in different regions. Through the built-in parameter configuration interface, operators can set key parameters. The operation mode recognition module is used to determine the operation mode of the wind turbine by combining the real-time power of the grid connection point and the wind turbine's operating status, and by comparing the real-time power of the grid connection point with the maximum power curve of the wind turbine.

[0024] The control module includes a frequency status judgment module, an AGC coordination control module, and a fan control module; The frequency status judgment module is used to compare the power grid frequency with the preset dead zone in real time to determine whether the power grid frequency exceeds the dead zone. At the same time, the frequency status judgment module itself has a signal verification mechanism to avoid false signal transmission through continuous sampling. The AGC coordination control module is used to realize the coordinated control of the primary frequency regulation and AGC coordination system, execute the core logic of positive superposition and reverse blocking, calculate the final total power output target of the station and allocate it to individual wind turbines. The wind turbine control module is used to receive coordination commands output from the AGC coordination control module, adjust the active power output of the wind turbine, and ensure the safe operation of the wind turbine to avoid grid disconnection or shutdown. The fan control module is equipped with a safety protection mechanism that monitors the fan operating parameters in real time to prevent the fan parameters from exceeding the safety threshold during adjustment, thus maintaining stable fan operation and preventing the fan from disconnecting from the grid.

[0025] The primary frequency regulation and AGC coordination system also includes a frequency regulation curve unit, which is used to participate in the rapid frequency regulation of the wind turbine when it is in different power generation modes; When the wind turbine is in the maximum power free generation state, when the grid frequency rises, the primary frequency regulation system controls the wind turbine to quickly reduce active power output through the energy management platform according to the frequency regulation curve unit, implements power limiting control on the wind turbine, and reduces the overall power plant output; when the grid frequency drops, it can quickly control the wind turbine to increase active power output, increase the overall power plant processing, thereby achieving the purpose of primary frequency regulation control. When the wind turbine is operating under limited power, and the grid frequency decreases, the primary frequency regulation system controls the wind turbine to rapidly increase active power output through the energy management platform according to the frequency regulation curve unit, thereby increasing the overall power output of the wind farm and achieving the frequency regulation control target. When the grid frequency increases, the primary frequency regulation system quickly controls the wind turbine to reduce active power output according to the frequency regulation curve unit, thereby reducing the overall power output of the wind farm and achieving the primary frequency regulation control target.

[0026] It also includes a logic switching module, used to perform a lockout switching between the primary frequency modulation system and the AGC system when the frequency exceeds the dead zone range, provided that: When the frequency exceeds the dead zone range; the frequency modulation interlock signal is 1, the primary frequency modulation system starts to issue instructions, the AGC system locks its own function of issuing scheduling instructions, and the wind turbine receives and executes the instructions of the primary frequency modulation system. When the frequency is within the dead zone, i.e. when the frequency modulation blocking signal is 0, the primary frequency modulation system stops issuing commands, the AGC system resumes its own function of issuing scheduling commands, and the wind turbine receives and executes the AGC system commands.

[0027] The primary frequency modulation system and the AGC system perform positive superposition and reverse interlocking, with the specific logic as follows: When the frequency f ≥ (50 + dead zone setpoint) Hz and the AGC system command remains unchanged, the primary frequency regulation system first calculates the frequency regulation target value P1 (load reduction command) and allocates it to each wind turbine. During frequency regulation, when the primary frequency regulation system detects that the AGC system command △Pagc is a load reduction command, and both the AGC system command and the primary frequency regulation system command are load reduction commands, they are positively superimposed. The primary frequency regulation and AGC coordination system issues P1 + △Pagc to achieve positive superposition. During frequency regulation, when the primary frequency regulation system detects that the AGC system command △Pagc is a load increase command, and the AGC system command and the primary frequency regulation system command have opposite adjustment directions, they are reversely locked. The primary frequency regulation system allocates P1 to each wind turbine to achieve reverse locking. When the frequency f ≤ (50 - dead zone setpoint) Hz and the AGC system command remains unchanged, the primary frequency regulation system first calculates the frequency regulation target value P2 (load increase command) and allocates it to each wind turbine. During frequency regulation, when the primary frequency regulation system detects that the AGC system command △Pagc is a load increase command, and both the AGC system command and the primary frequency regulation system command are load increase commands, they are positively superimposed. The primary frequency regulation and AGC coordination system issues P2 + △Pagc to achieve positive superposition. During frequency regulation, when the primary frequency regulation system detects that the AGC system command △Pagc is a load decrease command, and the AGC system command and the primary frequency regulation system command have opposite adjustment directions, they are reversely locked. The primary frequency regulation control system allocates P2 to each wind turbine to achieve reverse locking.

[0028] When the AGC system command and the primary frequency regulation system command adjust in the same direction, the logic quantizes and superimposes the two commands through positive superposition logic, which significantly enhances the adjustment of the total output of the power station and enables rapid adjustment of the deviation of the power grid frequency. By using the same-direction superposition effect and the reverse instruction blocking logic to directly block the reverse adjustment instruction of the AGC system, the repeated output fluctuations caused by the frequency modulation conflict between the AGC system instruction and the primary frequency modulation system instruction are avoided, which would result in weak frequency modulation effect, affect the frequency modulation accuracy and efficiency of the AGC system and the primary frequency modulation system, and improve the coordination between the AGC system and the primary frequency modulation system.

[0029] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A primary frequency modulation and AGC coordination system for grid connection point electrical parameter acquisition, characterized in that, include: The basic hardware module is used to accurately collect electrical parameters at the grid connection point, providing real-time, reliable, and secure underlying support for the coordinated control of the primary frequency regulation system and the AGC system; The core system module is used to make real-time judgments on the operating status of the wind turbine, realize the coordination of control authority between the primary frequency regulation system and the AGC system, and integrate multi-dimensional data from the grid side, wind turbine side, and AGC side as the basis for frequency regulation decisions. The feedback correction module is used to collect the actual active power output of the wind turbine after adjustment and the change of grid frequency, determine whether there is a deviation between the actual output and the target output, recalculate the adjustment command and issue it, forming a dynamic closed loop, and improving the coordination accuracy of the core system modules. The system protection module is used to ensure continuous system operation, avoid system interruption, improve system stability and security, provide backup equipment support for the system, and ensure uninterrupted data acquisition and communication.

2. The primary frequency modulation and AGC coordination system for grid connection point electrical parameter acquisition according to claim 1, characterized in that: The basic hardware modules include grid-connected monitoring and control devices, core servers, network switches, front-end workstations, and network security monitoring devices; The grid-connected monitoring and control device is used to collect current and voltage signals at the grid connection point in real time, and calculate the real-time power and grid frequency at the grid connection point based on the collected signals, providing a grid data foundation for the core system modules. The core server is used to collect data from grid-connected monitoring and control devices and wind turbine status data, and to communicate with the AGC system and wind turbine energy management platform. It serves as the core carrier for data processing and instruction calculation of the core system modules. The front-end workstation is used to handle human-computer interaction functions, supporting users to configure frequency modulation parameters, view system operating status, export data reports, forward instructions and feedback data from the core server, and enable staff to intuitively see and set data through the front screen; The network security monitoring device is used to connect to the primary frequency modulation and AGC coordination system, monitor network access behavior and data transmission security, ensure that system data is not leaked, and set user permissions so that system instructions cannot be modified when staff do not enter the correct password, thus ensuring the safe operation of the system. Network switches are used to build internal communication networks within a system, ensuring the real-time performance and stability of data transmission between core servers, front-end workstations, network-connected monitoring and control devices, and network security monitoring devices.

3. The primary frequency modulation and AGC coordination system for grid connection point electrical parameter acquisition according to claim 2, characterized in that: The core system modules include a data acquisition module and a control module. The data acquisition module is used to collect data to provide data support for the control module. It mainly collects electrical parameters at the grid connection point, wind turbine status, and AGC commands. The control module, based on the data collected by the data acquisition module, controls the coordinated switching between the primary frequency regulation and AGC coordination system according to the power generation mode of the wind turbine.

4. The primary frequency modulation and AGC coordination system for grid connection point electrical parameter acquisition according to claim 1, characterized in that: The feedback correction module includes a deviation calculation module and a closed-loop correction module. The deviation calculation module is used to calculate the deviation of a single wind turbine and the total deviation of the site, monitor the execution effect of frequency regulation commands, and determine whether the regulation accuracy meets the requirement of deviation ≤ ±1% of rated active power when stable. It is also equipped with an alarm device. When the deviation calculation is too large, the frequency regulation target deviation value is recalculated and an alarm is pushed to the front-end workstation to remind the operation and maintenance personnel to pay attention. The closed-loop correction module is used to correct the deviation calculated by the deviation calculation module. Through fine-tuning correction commands, the rated output is gradually corrected to ensure that the adjustment accuracy meets the requirement of deviation ≤ ±1% of rated active power when stable.

5. The primary frequency modulation and AGC coordination system for grid connection point electrical parameter acquisition according to claim 1, characterized in that: The system protection module includes a dual-machine hot standby module and a verification module. The dual-machine hot standby module adopts a primary and secondary architecture, with backup equipment for the core server, front-end workstation, grid-connected monitoring and control device and network switch in the basic hardware module. This ensures that the primary frequency regulation and AGC coordination system can operate without interruption or failure during long-term operation, while meeting the power system's safety deployment requirements and supporting the system's stable operation 24 / 7. The verification module is used to extract its own operating data in real time during system operation and compare it with the standard values ​​in the database to ensure that all technical indicators of the system meet the requirements of national standards and regional power grid rules, and to generate a compliance test report after the project is completed.

6. The primary frequency modulation and AGC coordination system for grid connection point electrical parameter acquisition according to claim 3, characterized in that: The data acquisition module includes a multi-source data acquisition module, a parameter configuration module, and an operating mode recognition module; The multi-source data acquisition module collects grid connection point current and voltage signals through the grid-connected measurement and control device, calculates real-time power and grid frequency, collects core data of a single wind turbine in real time through the wind turbine energy management platform, and collects AGC side data through the communication interface with the AGC system. In addition, it performs noise reduction, filtering and synchronization processing on the collected data to synchronize multiple data. The parameter configuration module is designed to adapt to the differentiated requirements of power grids in different regions. Through the built-in parameter configuration interface, operators can set key parameters. The operation mode recognition module is used to determine the operation mode of the wind turbine by combining the real-time power of the grid connection point and the wind turbine's operating status, and by comparing the real-time power of the grid connection point with the maximum power curve of the wind turbine.

7. The primary frequency modulation and AGC coordination system for grid connection point electrical parameter acquisition according to claim 3, characterized in that: The control module includes a frequency status judgment module, an AGC coordination control module, and a fan control module; The frequency status judgment module is used to compare the power grid frequency with the preset dead zone in real time to determine whether the power grid frequency exceeds the dead zone. At the same time, the frequency status judgment module itself has a signal verification mechanism to avoid false signal transmission through continuous sampling. The AGC coordination control module is used to realize the coordinated control of the primary frequency regulation and AGC coordination system, execute the core logic of positive superposition and reverse blocking, calculate the final total power output target of the station and allocate it to individual wind turbines. The wind turbine control module is used to receive coordination commands output from the AGC coordination control module, adjust the active power output of the wind turbine, and ensure the safe operation of the wind turbine to avoid grid disconnection or shutdown.

8. The primary frequency modulation and AGC coordination system for grid connection point electrical parameter acquisition according to claim 6, characterized in that: The primary frequency regulation and AGC coordination system also includes a frequency regulation curve unit, which is used to participate in the rapid frequency regulation of the wind turbine when it is in different power generation modes; When the wind turbine is in the maximum power free generation state, when the grid frequency rises, the primary frequency regulation system controls the wind turbine to quickly reduce active power output through the energy management platform according to the frequency regulation curve unit, implements power limiting control on the wind turbine, and reduces the overall power plant output; when the grid frequency drops, it can quickly control the wind turbine to increase active power output, increase the overall power plant processing, thereby achieving the purpose of primary frequency regulation control. When the wind turbine is operating under limited power, and the grid frequency decreases, the primary frequency regulation system controls the wind turbine to rapidly increase active power output through the energy management platform according to the frequency regulation curve unit, thereby increasing the overall power output of the wind farm and achieving the frequency regulation control target. When the grid frequency increases, the primary frequency regulation system quickly controls the wind turbine to reduce active power output according to the frequency regulation curve unit, thereby reducing the overall power output of the wind farm and achieving the primary frequency regulation control target.

9. The primary frequency modulation and AGC coordination system for grid connection point electrical parameter acquisition according to claim 8, characterized in that: It also includes a logic switching module, used to perform a lockout switching between the primary frequency modulation system and the AGC system when the frequency exceeds the dead zone range, provided that: When the frequency exceeds the dead zone range; the frequency modulation interlock signal is 1, the primary frequency modulation system starts to issue instructions, the AGC system locks its own function of issuing scheduling instructions, and the wind turbine receives and executes the instructions of the primary frequency modulation system. When the frequency is within the dead zone, i.e. when the frequency modulation blocking signal is 0, the primary frequency modulation system stops issuing commands, the AGC system resumes its own function of issuing scheduling commands, and the wind turbine receives and executes the AGC system commands.

10. The primary frequency modulation and AGC coordination system for grid connection point electrical parameter acquisition according to claim 9, characterized in that: The primary frequency modulation system and the AGC system perform positive superposition and reverse interlocking, with the specific logic as follows: When the frequency f ≥ (50 + dead zone setpoint) Hz and the AGC system command remains unchanged, the primary frequency regulation system first calculates the frequency regulation target value P1 and allocates it to each wind turbine. During the frequency regulation period, when the primary frequency regulation system detects that the AGC system command △Pagc is a load reduction command, and both the AGC system command and the primary frequency regulation system command are load reduction commands, they are positively superimposed. The primary frequency regulation and AGC coordination system issues P1 + △Pagc to achieve positive superposition. During the frequency regulation period, when the primary frequency regulation system detects that the AGC system command △Pagc is a load increase command, and the AGC system command and the primary frequency regulation system command have opposite adjustment directions, they are reversely locked. The primary frequency regulation system allocates P1 to each wind turbine to achieve reverse locking. When the frequency f ≤ (50 - dead zone setpoint) Hz and the AGC system command remains unchanged, the primary frequency regulation system first calculates the frequency regulation target value P2 and allocates it to each wind turbine. During frequency regulation, when the primary frequency regulation system detects that the AGC system command △Pagc is a load increase command, and both the AGC system command and the primary frequency regulation system command are load increase commands, they are positively superimposed. The primary frequency regulation and AGC coordination system issues P2 + △Pagc to achieve positive superposition. During frequency regulation, when the primary frequency regulation system detects that the AGC system command △Pagc is a load decrease command, and the AGC system command and the primary frequency regulation system command have opposite adjustment directions, they are reversely locked. The primary frequency regulation control system allocates P2 to each wind turbine to achieve reverse locking.

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