Method, system and equipment for correcting maximum available active power of wind and light of wind and light storage station

Abstract

The invention discloses a method, a system and equipment for correcting the maximum available active power of wind and light of a wind and light storage station, and relates to the field of new energy, and the method comprises the steps: determining the unlimited power flag bits of a wind power plant and a photovoltaic power station based on the operation mode of the wind and light storage station; correcting the active instructions of the wind power plant and the photovoltaic power station based on the operation mode and the no-power-limit flag bit to obtain final execution active instructions of the wind power plant and the photovoltaic power station; and correcting the maximum available active power of the wind power plant and the photovoltaic power station based on the no-power-limit flag bit and the final execution active power instruction to obtain the corrected maximum available active power of the wind power plant and the photovoltaic power station. According to the method, the maximum available active power of the wind power and the photovoltaic power is dynamically corrected, so that the power generation potential can be fully released under the condition that the wind power and the photovoltaic power are not limited.

Description

Technical Field

[0001] This application relates to the field of new energy, and in particular to a method, system and equipment for correcting the maximum active power generated by wind and solar power in a wind-solar-storage station. Background Technology

[0002] As the most promising new energy sources, solar and wind energy are inexhaustible renewable resources, green energy with zero emissions during production, and their proportion in China's energy consumption and supply is continuously increasing. Solar and wind energy complement each other temporally: during the day, when the weather is clear, sunlight is abundant and wind is weak, while at night the opposite occurs; in summer, sunlight is abundant and wind is weak, while in winter, wind is strong. Therefore, adopting a wind-solar hybrid approach can effectively reduce the uncertainty caused by changes in natural conditions. Energy storage devices can store excess electricity when wind and solar power generation is excessive, and provide the necessary power to the load when power generation is insufficient, thereby helping the system maintain a stable power supply environment.

[0003] In the Automatic Generation Control (AGC) strategy of wind, solar, and energy storage (FSG) power plants, command allocation typically employs various methods such as proportional allocation, wind priority, and solar priority. These strategies aim to optimize the power dispatch of wind, solar, and energy storage to ensure stable system operation. During command allocation at FSGs, precise adjustment of the output of each generating unit depends on the active power output capabilities of the wind farm, solar power plant, and energy storage station. However, due to the typically large and dispersed nature of large-scale FSGs, the maximum active power output estimated using wind benchmarking and solar prototyping algorithms has inherent inaccuracies. In wind priority mode, when wind power output is unrestricted, the maximum generating potential of wind power cannot be fully realized; in solar priority mode, when solar power plants are unrestricted, the solar power generation capacity is not maximized; and in proportional allocation mode, when wind and solar power are unrestricted, the potential of wind and solar power generation is not fully developed. These problems directly restrict the renewable energy absorption capacity of wind, solar and energy storage facilities, thereby affecting the economic benefits and overall operational efficiency of the facilities. Summary of the Invention

[0004] The purpose of this application is to provide a method, system, and equipment for correcting the maximum active power generated by wind and solar power in a wind-solar-storage station. This method can dynamically correct the maximum active power generated by wind and solar power, ensuring that their power generation potential is fully released when wind and solar power are not restricted.

[0005] To achieve the above objectives, this application provides the following solution: Firstly, this application provides a method for correcting the maximum active power generated by wind and solar power at a wind-solar-storage station, including: The power curtailment-free flag for wind farms and photovoltaic power stations is determined based on their operating modes. Based on the operating mode and the unrestricted power flag, the active power commands of the wind farm and the photovoltaic power station are modified to obtain the final active power commands to be executed by the wind farm and the photovoltaic power station. Based on the unrestricted power flag and the final active power command, the maximum active power that the wind farm and photovoltaic power station can generate is corrected to obtain the corrected maximum active power that the wind farm and photovoltaic power station can generate.

[0006] Secondly, this application provides a wind-solar-storage station maximum active power generation correction system, comprising: The "Unrestricted Power Flag" determination module is used to determine the unrestricted power flag for wind farms and photovoltaic power stations based on their operating modes. The active power command correction module is used to correct the active power commands of the wind farm and the photovoltaic power station based on the operating mode and the power-unrestricted flag, so as to obtain the final active power commands to be executed by the wind farm and the photovoltaic power station. The maximum active power generation correction module is used to correct the maximum active power generation of wind farms and photovoltaic power stations based on the unrestricted power flag and the final active power execution command, so as to obtain the corrected maximum active power generation of wind farms and photovoltaic power stations.

[0007] Thirdly, this application provides a computer device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the above-described method for correcting the maximum active power generated by wind and solar power at a wind and solar storage station.

[0008] According to the specific embodiments provided in this application, this application has the following technical effects: This application provides a method, system, and equipment for correcting the maximum active power output of wind, solar, and energy storage power plants. Unlike traditional methods that rely solely on benchmark and sample machine algorithms to estimate the maximum active power output for command allocation, this application determines whether wind and solar power are operating under unrestricted power conditions. When wind and solar power are not subject to curtailment, the maximum active power output of the wind farm and solar power station is dynamically corrected, thereby effectively improving the renewable energy absorption capacity of the wind, solar, and energy storage power plant and optimizing its overall operating efficiency. This application not only helps to enhance the renewable energy generation potential of wind, solar, and energy storage power plants but also significantly improves the economic benefits and resource utilization efficiency of the plants. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 A flowchart illustrating a method for correcting the maximum active power generated by wind and solar power at a wind-solar storage station, provided as an embodiment of this application; Figure 2 A schematic diagram of the total active power output curves before and after the improvement; Figure 3 A schematic diagram showing the maximum active power output of the wind farm before and after improvement; Figure 4 A schematic diagram showing the maximum active power output of the photovoltaic power station before and after the improvement. Figure 5 A schematic diagram of the active power output curves of energy storage before and after the improvement. Detailed Implementation

[0011] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0012] To maximize the output capacity of wind and solar power under unrestricted power conditions, this application proposes a method, system, and equipment for correcting the maximum active power output of wind, solar, and energy storage stations. By dynamically correcting the maximum active power output of wind and solar power, this ensures that their power generation potential is fully released under unrestricted conditions. Under this condition, firstly, the maximum active power output of wind / solar power is corrected, and a correction deviation value is added to the actual output of wind / solar power, serving as a new wind / solar power command, which is then issued to the wind farm / solar power station respectively. Simultaneously, the corrected actual wind and solar power outputs are assigned as the maximum wind and solar power output values, ensuring that the system can fully tap the maximum potential of wind and solar power generation while accurately tracking the commands.

[0013] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0014] In one exemplary embodiment, such as Figure 1As shown, a method for correcting the maximum active power generated by wind and solar power at a wind and solar storage station is provided. This method is executed by computer equipment, specifically by a terminal or server alone, or by both a terminal and a server. In this embodiment, the method is described using a server as an example, and includes the following steps S1 to S3.

[0015] S1: Determine the unrestricted power flag for wind farms and photovoltaic power stations based on their operating modes.

[0016] Based on the current operating mode of the wind, solar, and energy storage power stations, their power output capacity, the size of dispatch instructions, and the charging capacity of the energy storage power stations, it is determined whether the wind farms and solar power stations are currently in an uncurtailed mode. If both the wind farm and solar power station are operating in a curtailed mode, the allocated active power instructions from the wind farm / solar power station are directly issued without processing. If the wind farm / solar power station is operating in an uncurtailed mode, an offset is superimposed on the active power instructions of the uncurtailed generation units to tap into their maximum output capacity. Simultaneously, the maximum output capacity of the uncurtailed generation units is adjusted to ensure accurate tracking of the active power instructions dispatched by the wind, solar, and energy storage power stations. Finally, the wind farm / solar power station active power instructions with the added offset are issued.

[0017] The operation modes of wind-solar storage stations include wind-solar ratio allocation mode, wind priority mode, and solar priority mode.

[0018] 1) When operating in wind-solar ratio allocation mode In the formula, This indicates the power supply-free status of the photovoltaic power station. This indicates the power curtailment status of the wind farm; 0 indicates power curtailment, and 1 indicates no power curtailment. Indicates the active power dispatch instruction; This indicates the maximum chargeable active power of the energy storage power station; This indicates the active power loss of the energy storage power station; This indicates the maximum active power that a photovoltaic power station can generate; This indicates the maximum active power that a wind farm can generate.

[0019] 2) When running in wind priority mode In the formula, This indicates the minimum active power that a photovoltaic power station can generate.

[0020] 3) When running in light priority mode In the formula, This represents the minimum active power that a wind farm can generate.

[0021] S2: Based on the operating mode and the unrestricted power flag, the active power commands of the wind farm and the photovoltaic power station are modified to obtain the final active power commands to be executed by the wind farm and the photovoltaic power station.

[0022] 1) When operating in wind-solar ratio allocation mode In the formula, This indicates the final execution of active power commands by the wind farm; This indicates the active power dispatch instructions for the wind farm; Indicates the command bias of the wind farm; This indicates the final execution of active power commands by the photovoltaic power station; This indicates the active power dispatch instructions for the photovoltaic power station; Indicates the instruction bias of the photovoltaic power station; This represents the maximum command offset of the wind farm (a constant set based on the installed capacity). This indicates the maximum command bias of the photovoltaic power plant.

[0023] 2) When running in wind priority mode In the formula, This indicates the actual active power generated by the wind farm.

[0024] 3) When running in light priority mode In the formula, This indicates the actual active power generated by the photovoltaic power station.

[0025] S3: Based on the unrestricted power flag and the final active power command, the maximum active power that the wind farm and the photovoltaic power station can generate is corrected to obtain the corrected maximum active power that the wind farm and the photovoltaic power station can generate.

[0026] in, This indicates the maximum active power that the wind farm can generate after correction. This indicates the maximum active power that the photovoltaic power station can generate after correction. The actual active power generated by the wind farm is determined based on the final active power command executed by the wind farm. The actual active power generated by a photovoltaic power station is determined based on the final active power command executed by the photovoltaic power station.

[0027] The control effects of wind and solar power storage stations before and after improvement under the proportional allocation mode are as follows: Figures 2-5 As shown, by Figure 2 It can be seen that the maximum absorbable power of energy storage is 140MW. Under the current operating conditions, the sum of the maximum active power generated by wind and solar power is less than the sum of the active power commands from the entire station dispatch plus the maximum absorbable power of energy storage. At this time, wind and solar power are in an unrestricted power state, and the actual power generation curves of the entire station before and after the improvement highly overlap. Figure 3 , Figure 4 and Figure 5 The improved algorithm proposed in this application can fully tap the active power output capacity of wind farms and photovoltaic power stations, and convert it into chemical energy within the capacity of energy storage power stations. Under the premise of ensuring accurate tracking of wind, solar and energy storage station commands, it can improve the renewable energy consumption capacity of wind, solar and energy storage stations.

[0028] This application further includes, after step S3: S4: Based on the modified maximum active power output, a minimum output constraint is applied to the final active power command to obtain the constrained active power command.

[0029] In the formula, This indicates the active power command after the wind farm has been constrained. This indicates the active power command after constraints are applied to the photovoltaic power plant.

[0030] S5: Apply step size constraints to the constrained active power commands and issue them to obtain the final active power commands issued by the wind farm and photovoltaic power station.

[0031] In the formula, This indicates that the wind farm has finally issued an active power command. This indicates the active power regulation step size of the wind farm. This indicates the final active power command issued by the photovoltaic power station. This indicates the active power regulation step size of the photovoltaic power station.

[0032] Based on the same inventive concept, this application also provides a system for correcting the maximum active power generated by wind and solar power at a wind-solar-storage storage station. The solution provided by this system is similar to the solution described in the above method. Therefore, the specific limitations of the one or more embodiments of the system for correcting the maximum active power generated by wind and solar power at a wind-solar-storage storage station provided below can be found in the limitations of the method for correcting the maximum active power generated by wind and solar power at a wind-solar-storage storage station described above, and will not be repeated here.

[0033] In one exemplary embodiment, a wind-solar-storage station maximum active power generation correction system is provided, comprising: The "Unrestricted Power Flag" determination module is used to determine the unrestricted power flag for wind farms and photovoltaic power stations based on their operating modes.

[0034] The active power command correction module is used to correct the active power commands of wind farms and photovoltaic power plants based on the operating mode and the power-unrestricted flag, so as to obtain the final active power commands to be executed by wind farms and photovoltaic power plants.

[0035] The maximum active power generation correction module is used to correct the maximum active power generation of wind farms and photovoltaic power stations based on the unrestricted power flag and the final active power execution command, so as to obtain the corrected maximum active power generation of wind farms and photovoltaic power stations.

[0036] In one exemplary embodiment, the system further includes: The constraint module is used to impose minimum output constraints on the final active power command based on the modified maximum available active power, thereby obtaining the constrained active power command.

[0037] The distribution module is used to constrain the step size of the constrained active power commands and distribute them to obtain the final distributed active power commands for wind farms and photovoltaic power plants.

[0038] In an exemplary embodiment, a computer device is provided, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments. The computer device can be a server or a terminal. The computer device includes a processor, a memory, an input / output interface (I / O), and a communication interface. The processor, memory, and I / O are connected via a system bus, and the communication interface is connected to the system bus via the I / O interface. The processor of the computer device provides computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The database of the computer device stores data to be processed. The I / O interface of the computer device is used for exchanging information between the processor and external devices. The communication interface of the computer device is used for communicating with external terminals via a network connection. When the computer program is executed by the processor, it implements a method for correcting the maximum active power generated by wind and solar power at a wind and solar storage station.

[0039] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0040] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments described above. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM).

[0041] The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0042] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0043] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for correcting wind-solar maximum available active power of a wind-solar storage station, characterized in that, include: The power curtailment-free flag for wind farms and photovoltaic power stations is determined based on their operating modes. Based on the operating mode and the unrestricted power flag, the active power commands of the wind farm and the photovoltaic power station are modified to obtain the final active power commands to be executed by the wind farm and the photovoltaic power station. Based on the unrestricted power flag and the final active power command, the maximum active power that the wind farm and photovoltaic power station can generate is corrected to obtain the corrected maximum active power that the wind farm and photovoltaic power station can generate.

2. The method of claim 1, wherein the maximum available active power of the wind- solar-storage station is modified by the wind-solar maximum available active power modifier. The operating modes include wind-solar ratio allocation mode, wind priority mode, and solar priority mode.

3. The method of claim 2, wherein the maximum available active power is modified by the wind power and the solar power. When the operating mode is wind-solar ratio allocation mode, the formula for determining the unrestricted power flag for wind farms and photovoltaic power stations is: in, This indicates the power-unrestricted status of the photovoltaic power station. This indicates the power curtailment status of the wind farm; 0 indicates power curtailment, and 1 indicates no power curtailment. Indicates the active power dispatch instruction; This indicates the maximum chargeable active power of the energy storage power station; This indicates the active power loss of the energy storage power station; This indicates the maximum active power that a photovoltaic power station can generate; This indicates the maximum active power that the wind farm can generate; When the operating mode is wind priority mode, the formula for determining the unrestricted power flag for wind farms and photovoltaic power stations is as follows: in, This indicates the minimum active power that a photovoltaic power station can generate; When the operating mode is light-priority mode, the formula for determining the unrestricted power flag for wind farms and photovoltaic power plants is as follows: in, This represents the minimum active power that a wind farm can generate.

4. The method for correcting the maximum active power generated by wind and solar power at a wind-solar-storage station according to claim 3, characterized in that, When the operating mode is wind-solar ratio allocation mode, the calculation formula for the final active power command executed by the wind farm and photovoltaic power station is as follows: in, This indicates the final execution of active power commands by the wind farm; This indicates the active power dispatch instructions for the wind farm; Indicates the command bias of the wind farm; This indicates the final execution of active power commands by the photovoltaic power station; This indicates the active power dispatch instructions for the photovoltaic power station; Indicates the instruction bias of the photovoltaic power station; When the operating mode is wind priority mode, the calculation formula for the final active power command executed by the wind farm and photovoltaic power station is as follows: in, This indicates the actual active power generated by the wind farm; When the operating mode is light-priority mode, the calculation formula for the final active power command executed by the wind farm and photovoltaic power station is as follows: in, This indicates the actual active power generated by the photovoltaic power station.

5. The method for correcting the maximum active power generated by wind and solar power at a wind-solar-storage station according to claim 3, characterized in that, The corrected formulas for calculating the maximum active power generated by wind farms and photovoltaic power plants are as follows: in, This indicates the maximum active power that the wind farm can generate after correction. This indicates the maximum active power that the photovoltaic power station can generate after correction. The actual active power generated by the wind farm is determined based on the final active power command executed by the wind farm. The actual active power generated by a photovoltaic power station is determined based on the final active power command executed by the photovoltaic power station.

6. The method for correcting the maximum active power generated by wind and solar power at a wind-solar-storage station according to claim 4, characterized in that, After correcting the maximum active power output of wind farms and photovoltaic power plants based on the aforementioned unrestricted power flag and the final active power command, the method further includes: The minimum output constraint is applied to the final active power command based on the modified maximum available active power, resulting in the constrained active power command. The active power commands after constraints are constrained and then issued to obtain the final active power commands issued by wind farms and photovoltaic power stations.

7. The method for correcting the maximum active power generated by wind and solar power at a wind-solar-storage station according to claim 6, characterized in that, The formula for calculating the final active power command issued by wind farms and photovoltaic power plants is as follows: in, This indicates that the wind farm has finally issued an active power command. This indicates the active power regulation step size of the wind farm. This indicates the final active power command issued by the photovoltaic power station. This indicates the active power regulation step size of a photovoltaic power station; This indicates the active power command after the wind farm has been constrained. This indicates the active power command after constraints are applied to the photovoltaic power plant.

8. A system for correcting the maximum active power generated by wind and solar power at a wind-solar-storage station, characterized in that, include: The "Unrestricted Power Flag" determination module is used to determine the unrestricted power flag for wind farms and photovoltaic power stations based on their operating modes. The active power command correction module is used to correct the active power commands of the wind farm and the photovoltaic power station based on the operating mode and the power-unrestricted flag, so as to obtain the final active power commands to be executed by the wind farm and the photovoltaic power station. The maximum active power generation correction module is used to correct the maximum active power generation of wind farms and photovoltaic power stations based on the unrestricted power flag and the final active power execution command, so as to obtain the corrected maximum active power generation of wind farms and photovoltaic power stations.

9. The wind-solar-storage station maximum active power generation correction system according to claim 8, characterized in that, Also includes: The constraint module is used to impose minimum output constraints on the final active power command based on the modified maximum generateable active power, so as to obtain the constrained active power command. The distribution module is used to constrain the step size of the constrained active power commands and distribute them to obtain the final distributed active power commands for wind farms and photovoltaic power plants.

10. A computer device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program to implement the method for correcting the maximum active power generated by wind and solar power at a wind and solar storage station as described in any one of claims 1-7.

Images