A method and system for multi-time scale active frequency control suitable for new energy station

Abstract

The application discloses a kind of active frequency control method and system of multi-time scale of new energy station, comprising: every fixed time obtains the grid-connected point frequency of new energy station, grid-connected point frequency slip, grid-connected point power, unit operating state and determines whether receiving stability control action instruction;According to whether receiving stability control action instruction, determine whether the grid-connected point of new energy station is set lock information;According to the grid-connected point frequency of new energy station, grid-connected point power, grid-connected point frequency slip, unit operating state and whether set lock information determine this round control amount.The advantages are: meet new energy power station emergency power control, virtual inertia control, primary frequency modulation control and normal AGC control function, meet power station multi-time scale active / frequency grid-connected control demand;It is conducive to reducing the repeated investment of new energy power station, realizes the coordinated operation of each function, meets the efficient requirement of power station as a whole.

Description

Technical Field

[0001] This invention relates to a method and system for active power frequency control adapted to multiple time scales in new energy power plants, belonging to the field of power system automatic control technology. Background Technology

[0002] With the large-scale grid connection of asynchronous power sources such as wind and solar power, a large number of conventional units have been replaced, leading to a significant decrease in AC system strength and overall system inertia. This has made power system frequency regulation increasingly difficult, posing a significant risk to power system frequency stability control. To address this issue, domestic and international research institutions have successively conducted research and development on the participation of solar / wind power plants in power system frequency / active power control, proposing technologies such as AGC, primary frequency regulation, virtual inertia technology, virtual synchronous machine (VSG) technology, and fast power control. Simultaneously, national and local power grid companies have successively proposed corresponding technical guidelines to guide the development of new energy power plants towards grid-friendly and proactively supportive systems. As these technologies and grid connection requirements have been successively introduced, new energy power plants have to continuously add corresponding control equipment and systems to achieve the required functions. This not only increases the investment cost of new energy power plants but also, from an operational control perspective, makes coordination difficult due to the independent nature of the various functions.

[0003] How to solve the problem of meeting the multi-timescale active / frequency grid-connected control requirements of wind farms and photovoltaic power plants for AGC, primary frequency regulation, virtual inertia control, and emergency power. Summary of the Invention

[0004] The technical problem to be solved by this invention is to overcome the defects of the prior art and provide a method and system for active power frequency control that is adapted to multiple time scales of new energy power plants. This method and system can solve the problems of active power / frequency grid connection control requirements of wind farms, photovoltaic power plants, AGC, primary frequency regulation, virtual inertia control, and emergency power at multiple time scales. It can realize real-time perception and control of the dynamic and full-process status of new energy power generation units, and achieve the goal of observable and controllable dynamic and full-process control of new energy power plants.

[0005] To address the aforementioned technical problems, this invention provides a method for active power frequency control adapted to multiple time scales in renewable energy power plants, comprising: At fixed intervals, the grid connection point frequency, grid connection point frequency slip, grid connection point power, unit operating status, and whether a stability control action command has been received are obtained from the new energy power station. Based on whether a stabilization action command has been received, determine whether the grid connection point of the new energy power station has been locked. The control quantity for this round is determined based on the grid connection frequency, grid connection power, grid connection frequency slip, unit operating status, and whether the interlocking is enabled information of the new energy power station; the control quantity for this round represents the allocation to each new energy unit, and each new energy unit performs power adjustment according to the allocation.

[0006] Furthermore, the step of determining whether to directly end the current round of judgment or calculate the current round of control quantity based on the grid connection frequency, grid connection power, grid connection frequency slip, unit operating status, and whether the interlocking information of the new energy power station includes: Confirmation that the stabilization action command has been received; Obtain the emergency power control quantity according to the stability control action command, and simultaneously set the AGC and primary frequency modulation action lockout signal; Based on the emergency power control quantity, unit operating status, and grid connection point power, the emergency power control quantity is allocated to each unit according to the pre-set principles, resulting in millisecond-level power control quantities for each new energy unit within the station.

[0007] Furthermore, the step of determining whether to directly end the current round of judgment or calculate the current round of control quantity based on the grid connection frequency, grid connection power, grid connection frequency slip, unit operating status, and whether the interlocking information of the new energy power station includes: It has been confirmed that no stabilization action command has been received; The virtual inertia action conditions are determined based on the grid connection point frequency and the grid connection point frequency slip, and the virtual inertia power control quantity is calculated. Based on the virtual inertia power control quantity, the unit operating status, and the grid connection point power, the virtual inertia power control quantity is pre-allocated to each unit according to the pre-set principles, thereby obtaining the millisecond-level power control quantity for each new energy unit in the station.

[0008] Furthermore, the step of determining whether to directly end the current round of judgment or calculate the current round of control quantity based on the grid connection frequency, grid connection power, grid connection frequency slip, unit operating status, and whether the interlocking information of the new energy power station includes: It has been confirmed that no stabilization action command has been received; Based on the grid connection point frequency and the grid connection point frequency slip, it is determined that the virtual inertia action condition is not met. Based on the grid connection point frequency, determine the conditions for satisfying the primary frequency regulation action, and calculate the primary frequency regulation power adjustment amount; Once a new instruction from AGC is received, calculate the power adjustment amount for AGC; The second-level control quantity for this round is calculated based on the frequency offset, the power adjustment amount of AGC, the power adjustment amount of primary frequency modulation, and the grid connection point power. The frequency offset is the absolute value of the difference between the grid connection point frequency and the rated frequency. The second-level control quantity of this round is allocated to each new energy unit to obtain the second-level power control quantity of each new energy unit in the station.

[0009] Furthermore, the step of determining whether to directly end the current round of judgment or calculate the current round of control quantity based on the grid connection frequency, grid connection power, grid connection frequency slip, unit operating status, and whether the interlocking information of the new energy power station includes: It has been confirmed that no stabilization action command has been received; Based on the grid connection point frequency and the grid connection point frequency slip, it is determined that the virtual inertia action condition is not met. Based on the grid connection point frequency, determine the conditions for satisfying the primary frequency regulation action, and calculate the primary frequency regulation power adjustment amount; It has been confirmed that no new instructions have been received from AGC; The second-level power control quantity for this round is calculated based on the frequency offset, the primary frequency modulation power adjustment, and the grid connection point power. The frequency offset is the absolute value of the difference between the grid connection point frequency and the rated frequency. The second-level power control amount for this round is allocated to each new energy unit to obtain the second-level power control amount for each new energy unit in the station.

[0010] Furthermore, the step of determining whether to directly end the current round of judgment or calculate the current round of control quantity based on the grid connection frequency, grid connection power, grid connection frequency slip, unit operating status, and whether the interlocking information of the new energy power station includes: It has been confirmed that no stabilization action command has been received; Based on the grid connection point frequency and the grid connection point frequency slip, it is determined that the virtual inertia action condition is not met. Based on the grid connection point frequency, it is determined that the conditions for a primary frequency regulation operation are not met. Once a new instruction from AGC is received, calculate the power adjustment amount for AGC; Calculate the second-level power control amount for this round of control based on the frequency offset, the power adjustment amount of AGC, and the grid connection point power; The second-level power control amount for this round is allocated to each new energy unit to obtain the second-level power control amount for each new energy unit in the station.

[0011] Furthermore, the step of determining whether to directly end the current round of judgment or calculate the current round of control quantity based on the grid connection frequency, grid connection power, grid connection frequency slip, unit operating status, and whether the interlocking information of the new energy power station includes: It has been confirmed that no stabilization action command has been received; Based on the grid connection point frequency and the grid connection point frequency slip, it is determined that the virtual inertia action condition is not met. Based on the grid connection point frequency, it is determined that the conditions for a primary frequency regulation operation are not met. It has been confirmed that no new instructions have been received from AGC; The power control quantity at the second level in this round is 0; The control quantity for this round is allocated to each new energy unit, resulting in a second-level power control quantity for each new energy unit within the station.

[0012] A multi-timescale active power frequency control system adapted to new energy power plants includes: a real-time control device and an application server; The real-time control device is used to realize millisecond-level active frequency control of the new energy power station. By acquiring the grid connection point frequency, grid connection point frequency slip, grid connection point power, and stability control action commands of the new energy power station, it determines the millisecond-level power control allocation of the unit. The application server is used to achieve active frequency control at the second level or above in new energy power plants. It determines the second-level power control quantity of the unit by acquiring the unit operating status, grid connection point power, grid connection point frequency, and interlocking information and AGC control quantity.

[0013] Furthermore, the real-time control device includes: Sampling calculation module, main control module, GOOSE communication module, 2M communication module, conventional communication module, human-computer interaction module; The sampling and calculation module is used to collect the three-phase voltage and current signals at the grid connection point and calculate the output power P, frequency f, and frequency slip df / dt of the grid connection point in real time. The GOOSE communication module is used to communicate with the main control system of the new energy power generation unit. The GOOSE communication module uses a combination of positional transmission and equal interval transmission mechanism to obtain the operating status and power information of the power generation unit in real time, and sends power commands or trip commands to the power generation unit. The 2M communication module is used to communicate with the stability control system, upload the power and status statistics of the new energy power station to the stability control system, and at the same time receive the start-up and action power commands issued by the superior stability control system. The human-machine interaction module is used to monitor the grid-connected real-time control device and the operating status of new energy sources, manage device settings, and configure the network. The main control module is used to coordinate and control the functions of stability control, virtual inertia, and grid-connected application server. The conventional communication module is used to communicate with the grid-connected application server.

[0014] 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.

[0015] A computing device, comprising, 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.

[0016] The beneficial effects achieved by this invention are as follows: By deploying a grid-connected control device (system), the system fulfills the functions of emergency power control, virtual inertia control, primary frequency regulation control, and normal AGC control for new energy power plants, meeting the multi-timescale active power / frequency grid-connected control requirements of the power plants. This method helps reduce redundant investment in new energy power plants, achieves coordinated operation of various functions, and meets the overall high-efficiency requirements of the power plant. Attached Figure Description

[0017] Figure 1 This is the logic diagram of the present invention; Figure 2 A schematic diagram of the system structure provided in this embodiment of the invention; Figure 3 This patent is implemented in a typical photovoltaic power station. Detailed Implementation

[0018] 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.

[0019] like Figure 1 As shown, a method for active power frequency control adapted to multiple time scales in new energy power plants includes: At fixed intervals, the grid connection point frequency, grid connection point frequency slip, grid connection point power, unit operating status, and whether a stability control action command has been received are obtained from the new energy power station. Based on whether a stabilization action command has been received, determine whether the grid connection point of the new energy power station has been locked. The control quantity for this round is determined based on the grid connection frequency, grid connection power, grid connection frequency slip, unit operating status, and whether the interlocking is enabled information of the new energy power station; the control quantity for this round represents the allocation to each new energy unit, and each new energy unit performs power adjustment according to the allocation.

[0020] Furthermore, the step of determining whether to directly end the current round of judgment or calculate the current round of control quantity based on the grid connection frequency, grid connection power, grid connection frequency slip, unit operating status, and whether the interlocking information of the new energy power station includes: Confirmation that the stabilization action command has been received; Obtain the emergency power control quantity according to the stability control action command, and simultaneously set the AGC and primary frequency modulation action lockout signal; Based on the emergency power control quantity, unit operating status, and grid connection point power, the emergency power control quantity is allocated to each unit according to the pre-set principles, resulting in millisecond-level power control quantities for each new energy unit within the station.

[0021] Furthermore, the step of determining whether to directly end the current round of judgment or calculate the current round of control quantity based on the grid connection frequency, grid connection power, grid connection frequency slip, unit operating status, and whether the interlocking information of the new energy power station includes: It has been confirmed that no stabilization action command has been received; The virtual inertia action conditions are determined based on the grid connection point frequency and the grid connection point frequency slip, and the virtual inertia power control quantity is calculated. Based on the virtual inertia power control quantity, the unit operating status, and the grid connection point power, the virtual inertia power control quantity is pre-allocated to each unit according to the pre-set principles, thereby obtaining the millisecond-level power control quantity for each new energy unit in the station.

[0022] Furthermore, the step of determining whether to directly end the current round of judgment or calculate the current round of control quantity based on the grid connection frequency, grid connection power, grid connection frequency slip, unit operating status, and whether the interlocking information of the new energy power station includes: It has been confirmed that no stabilization action command has been received; Based on the grid connection point frequency and the grid connection point frequency slip, it is determined that the virtual inertia action condition is not met. Based on the grid connection point frequency, determine the conditions for satisfying the primary frequency regulation action, and calculate the primary frequency regulation power adjustment amount; Once a new instruction from AGC is received, calculate the power adjustment amount for AGC; The second-level control quantity for this round is calculated based on the frequency offset, the power adjustment amount of AGC, the power adjustment amount of primary frequency modulation, and the grid connection point power. The frequency offset is the absolute value of the difference between the grid connection point frequency and the rated frequency. The second-level control quantity of this round is allocated to each new energy unit to obtain the second-level power control quantity of each new energy unit in the station.

[0023] Furthermore, the step of determining whether to directly end the current round of judgment or calculate the current round of control quantity based on the grid connection frequency, grid connection power, grid connection frequency slip, unit operating status, and whether the interlocking information of the new energy power station includes: It has been confirmed that no stabilization action command has been received; Based on the grid connection point frequency and the grid connection point frequency slip, it is determined that the virtual inertia action condition is not met. Based on the grid connection point frequency, determine the conditions for satisfying the primary frequency regulation action, and calculate the primary frequency regulation power adjustment amount; It has been confirmed that no new instructions have been received from AGC; The second-level power control quantity for this round is calculated based on the frequency offset, the primary frequency modulation power adjustment, and the grid connection point power. The frequency offset is the absolute value of the difference between the grid connection point frequency and the rated frequency. The second-level power control amount for this round is allocated to each new energy unit to obtain the second-level power control amount for each new energy unit in the station.

[0024] Furthermore, the step of determining whether to directly end the current round of judgment or calculate the current round of control quantity based on the grid connection frequency, grid connection power, grid connection frequency slip, unit operating status, and whether the interlocking information of the new energy power station includes: It has been confirmed that no stabilization action command has been received; Based on the grid connection point frequency and the grid connection point frequency slip, it is determined that the virtual inertia action condition is not met. Based on the grid connection point frequency, it is determined that the conditions for a primary frequency regulation operation are not met. Once a new instruction from AGC is received, calculate the power adjustment amount for AGC; Calculate the second-level power control amount for this round of control based on the frequency offset, the power adjustment amount of AGC, and the grid connection point power; The second-level power control amount for this round is allocated to each new energy unit to obtain the second-level power control amount for each new energy unit in the station.

[0025] Furthermore, the step of determining whether to directly end the current round of judgment or calculate the current round of control quantity based on the grid connection frequency, grid connection power, grid connection frequency slip, unit operating status, and whether the interlocking information of the new energy power station includes: It has been confirmed that no stabilization action command has been received; Based on the grid connection point frequency and the grid connection point frequency slip, it is determined that the virtual inertia action condition is not met. Based on the grid connection point frequency, it is determined that the conditions for a primary frequency regulation operation are not met. It has been confirmed that no new instructions have been received from AGC; The power control quantity at the second level in this round is 0; The control quantity for this round is allocated to each new energy unit, resulting in a second-level power control quantity for each new energy unit within the station.

[0026] The following describes in detail a multi-timescale active power frequency control system and its implementation method adapted to new energy power plants, using a typical photovoltaic power station as an implementation case. This photovoltaic system comprises 60 inverters, with two inverters forming a group of power generation units. The 60 inverters are connected to a step-up transformer via three feeders. The structural diagram of the system implemented in this patent is shown below. Figure 3 As shown, the system specifically includes: 60 inverters, 1 real-time control device, 1 application server, and the corresponding network. The power station communicates with the dispatch AGC master station through the dispatch data network and with the upper-level stability control system through a 2M communication cabinet. The real-time control device and application server are mounted on a panel in the protection room of the photovoltaic power station.

[0027] like Figure 2 As shown, an active power frequency control system adapted to multiple time scales in new energy power plants includes a real-time control device and an application server. The specific implementation steps are as follows: Step 1: Deploy sampling calculation module, GOOSE communication module, 2M communication module, main control module, human-machine interaction module, etc. on the real-time control device. The human-machine interaction module is used to control the device in real time to complete device setpoint management and network configuration.

[0028] Step 2: Information Acquisition 1) The real-time control device collects the three-phase voltage and current set signals at the grid connection point and calculates the output power P, frequency f, and frequency slip df / dt at the grid connection point in real time; 2) The GOOSE communication module communicates with the main control system of the new energy power generation unit. The GOOSE communication module uses a combination of positional transmission and equal interval transmission mechanism to obtain the operating status and power information of the power generation unit in real time, and sends power commands or trip commands to the power generation unit.

[0029] 3) Through the 2M communication module, the power and status statistics of the new energy power station can be uploaded to the stability control system. At the same time, it can receive start-up and action power commands issued by the superior stability control system.

[0030] Step 3: The main control logic module of the real-time control device deploys virtual inertia control and emergency power control; a logic judgment is performed every interval T1, and the specific logic judgment process is as follows: 3.1) The data acquisition and calculation module obtains the grid connection frequency f, frequency slip df / dt, and real-time power information; the 2M communication module obtains the control system command information; the GOOSE communication module obtains the power and operation information of the power generation unit, and then proceeds to the next step. 3.2) Determine whether a stabilization command has been received. If a stabilization action command has been received, acquire the emergency power control quantity, set the AGC and primary frequency modulation action lockout signals, and jump to step 3.4; otherwise, proceed to the next step. 3.3) Determine whether the virtual inertia action conditions are met by using the frequency and frequency slip. If the virtual inertia action conditions are met, obtain the virtual inertia power control quantity through the corresponding formula and proceed to step 3.4; otherwise, proceed to step 3.5. 3.4) Based on the control parameters, unit status information, and grid connection point power information, allocate power to each unit according to certain principles, and issue control commands. Then proceed to step 3.5; 3.5) Send the grid connection point power, frequency and blocking information to the application server, and this round of judgment ends.

[0031] Step 4: Deploy the scheduling communication module, AGC control module, primary frequency regulation control module, and communication module with the EMS or generator units within the station on the application server. This module acquires the grid connection point's frequency and power information through a real-time control device, primarily responsible for achieving active power / frequency control at the second level or higher for the renewable energy plant. The application server performs a logical judgment every time interval T2, and its specific control flow is as follows: 4.1) Obtain the overall unit operation information, grid connection point power and frequency information, and interlocking signals. If the interlocking signal is 1, proceed to the end; otherwise, proceed to the next step. 4.2) Based on the received frequency signal, determine whether the conditions for a first frequency modulation action are met. If they are met, calculate the first frequency modulation action amount and proceed to step 4.3; otherwise, directly proceed to step 4.3. 4.3) Determine whether a new instruction from AGC has been received. If no new instruction has been received, proceed to step 4.5. If a new instruction has been received, calculate the power control amount of AGC and then proceed to step 4.4.

[0032] 4.4) Calculate the control quantity for this round based on the frequency offset, AGC power adjustment, primary frequency modulation power adjustment, and current power, and then proceed to the next step; 4.5) Distribute the control quantities of this round to each unit, send them to the unit control system for execution, and then terminate.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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 method for multi-time scale active frequency control suitable for new energy stations, characterized in that, include: At fixed intervals, the grid connection point frequency, grid connection point frequency slip, grid connection point power, unit operating status, and whether a stability control action command has been received are obtained from the new energy power station. Based on whether a stabilization action command has been received, determine whether the grid connection point of the new energy power station has been locked. The control quantity for this round is determined based on the grid connection frequency, grid connection power, grid connection frequency slip, unit operating status, and whether the interlocking information is set. The control quantity for this round represents the allocation to each new energy unit, and each new energy unit performs power adjustment according to the allocation. The process of determining whether to directly end the current round of judgment or calculate the current round of control quantity based on the grid connection frequency, grid connection power, grid connection frequency slip, unit operating status, and whether interlocking information of the new energy power station includes: Confirm receipt of the stabilization action command; obtain the emergency power control quantity according to the stabilization action command, and simultaneously set the AGC and primary frequency modulation action interlock signals; Based on the emergency power control quantity, the unit operating status, and the grid connection point power, the emergency power control quantity is allocated to each unit according to the pre-set principles, resulting in millisecond-level power control quantities for each new energy unit in the station. It is determined that no stabilization action command has been received; based on the grid connection point frequency and the grid connection point frequency slip, it is determined that the virtual inertia action condition is not met; based on the grid connection point frequency, it is determined that the primary frequency regulation action condition is met, and the primary frequency regulation power adjustment amount is calculated; it is determined that a new AGC command has been received, and the AGC power adjustment amount is calculated; based on the frequency offset magnitude, the AGC power adjustment amount, the primary frequency regulation power adjustment amount, and the grid connection point power, the second-level control amount for this round is calculated, where the frequency offset magnitude is the absolute value of the difference between the grid connection point frequency and the rated frequency; the second-level control amount for this round is allocated to each new energy unit to obtain the second-level power control amount for each new energy unit in the station.

2. The active power frequency control method for adapting to multiple time scales in new energy power plants according to claim 1, characterized in that, The process of determining whether to directly end the current round of judgment or calculate the current round of control quantity based on the grid connection frequency, grid connection power, grid connection frequency slip, unit operating status, and whether interlocking information of the new energy power station includes: It has been confirmed that no stabilization action command has been received; The virtual inertia action conditions are determined based on the grid connection point frequency and the grid connection point frequency slip, and the virtual inertia power control quantity is calculated. Based on the virtual inertia power control quantity, the unit operating status, and the grid connection point power, the virtual inertia power control quantity is pre-allocated to each unit according to the pre-set principles, thereby obtaining the millisecond-level power control quantity for each new energy unit in the station.

3. The active power frequency control method for adapting to multiple time scales in new energy power plants according to claim 1, characterized in that, The process of determining whether to directly end the current round of judgment or calculate the current round of control quantity based on the grid connection frequency, grid connection power, grid connection frequency slip, unit operating status, and whether interlocking information of the new energy power station includes: It has been confirmed that no stabilization action command has been received; Based on the grid connection point frequency and the grid connection point frequency slip, it is determined that the virtual inertia action condition is not met. Based on the grid connection point frequency, determine the conditions for satisfying the primary frequency regulation action, and calculate the primary frequency regulation power adjustment amount; It has been confirmed that no new instructions have been received from AGC; The second-level power control quantity for this round is calculated based on the frequency offset, the primary frequency modulation power adjustment, and the grid connection point power. The frequency offset is the absolute value of the difference between the grid connection point frequency and the rated frequency. The second-level power control amount for this round is allocated to each new energy unit to obtain the second-level power control amount for each new energy unit in the station.

4. The active power frequency control method for adapting to multiple time scales in new energy power plants according to claim 1, characterized in that, The process of determining whether to directly end the current round of judgment or calculate the current round of control quantity based on the grid connection frequency, grid connection power, grid connection frequency slip, unit operating status, and whether interlocking information of the new energy power station includes: It has been confirmed that no stabilization action command has been received; Based on the grid connection point frequency and the grid connection point frequency slip, it is determined that the virtual inertia action condition is not met. Based on the grid connection point frequency, it is determined that the conditions for a primary frequency regulation operation are not met. Once a new instruction from AGC is received, calculate the power adjustment amount for AGC; Calculate the second-level power control amount for this round of control based on the frequency offset, the power adjustment amount of AGC, and the grid connection point power; The second-level power control amount for this round is allocated to each new energy unit to obtain the second-level power control amount for each new energy unit in the station.

5. The active power frequency control method for adapting to multiple time scales in new energy power plants according to claim 1, characterized in that, The process of determining whether to directly end the current round of judgment or calculate the current round of control quantity based on the grid connection frequency, grid connection power, grid connection frequency slip, unit operating status, and whether interlocking information of the new energy power station includes: It has been confirmed that no stabilization action command has been received; Based on the grid connection point frequency and the grid connection point frequency slip, it is determined that the virtual inertia action condition is not met. Based on the grid connection point frequency, it is determined that the conditions for a primary frequency regulation operation are not met. It has been confirmed that no new instructions have been received from AGC; The power control quantity at the second level in this round is 0; The control quantity for this round is allocated to each new energy unit, resulting in a second-level power control quantity for each new energy unit within the station.

6. A multi-timescale active power frequency control system adapted to new energy power plants, characterized in that, include: Real-time control devices and application servers; The real-time control device is used to realize millisecond-level active power frequency control of the new energy power station, including: acquiring the grid connection point frequency, grid connection point frequency slip, grid connection point power, unit operating status, and determining whether a stability control action command has been received at fixed intervals; and determining whether the grid connection point of the new energy power station is locked based on whether a stability control action command has been received. Upon receiving the stabilization and control action command, the emergency power control quantity is obtained according to the stabilization and control action command, and the AGC and primary frequency regulation action lockout signals are set simultaneously. Based on the emergency power control quantity, the unit operating status, and the grid connection point power, the emergency power control quantity is allocated to each unit according to the pre-set principles to obtain the millisecond-level power control quantity of each new energy unit in the station. When no stabilization action command is received, the grid connection point frequency, grid connection point power, and grid connection point frequency slip are sent to the application server. The application server is used to achieve active frequency control at the second level or above in new energy power plants, including: determining whether the virtual inertia action condition is not met based on the grid connection point frequency and the grid connection point frequency slip; determining whether the primary frequency regulation action condition is met based on the grid connection point frequency, and calculating the primary frequency regulation power adjustment amount; determining that a new AGC instruction has been received, and calculating the AGC power adjustment amount; calculating the second-level control amount for this round based on the frequency offset, the AGC power adjustment amount, the primary frequency regulation power adjustment amount, and the grid connection point power, wherein the frequency offset is the absolute value of the difference between the grid connection point frequency and the rated frequency; and distributing the second-level control amount for this round to each new energy unit to obtain the second-level power control amount for each new energy unit in the station.

7. The active power frequency control system adapted to multiple time scales of new energy power plants according to claim 6, characterized in that, The real-time control device includes: Sampling calculation module, main control module, GOOSE communication module, 2M communication module, conventional communication module, human-computer interaction module; The sampling and calculation module is used to collect the three-phase voltage and current signals at the grid connection point and calculate the grid connection point power P, grid connection point frequency f, and grid connection point frequency slip df / dt in real time. The GOOSE communication module is used to communicate with the main control system of the new energy power generation unit. The GOOSE communication module uses a combination of positional transmission and equal interval transmission mechanism to obtain the operating status and power information of the power generation unit in real time, and sends power commands or trip commands to the power generation unit. The 2M communication module is used to communicate with the stability control system, upload the power and status statistics of the new energy power station to the stability control system, and at the same time receive the start-up and action power commands issued by the superior stability control system. The human-machine interaction module is used to monitor the grid-connected real-time control device and the operating status of new energy sources, manage device settings, and configure the network. The main control module is used to coordinate the control of stability control, virtual inertia and application server functions; The conventional communication module is used to communicate with the grid-connected application server.

8. 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 the method according to any one of claims 1 to 5.

9. 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 the method according to any one of claims 1 to 5.

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