Flywheel energy storage participates in primary frequency modulation power reporting method and device, terminal and storage medium

Abstract

This invention provides a power reporting method, apparatus, terminal, and storage medium for flywheel energy storage participating in primary frequency regulation. The method includes: acquiring the frequency regulation time of the flywheel energy storage array participating in primary frequency regulation issued by the power grid; determining the upper limit of the dispatchable energy of the flywheel energy storage unit based on the frequency regulation time and the maximum frequency regulation time of the flywheel energy storage unit; limiting the dispatchable energy of each flywheel energy storage unit in the flywheel energy storage array using the upper limit of the dispatchable energy; determining the maximum frequency regulation power of the flywheel energy storage array based on the limited dispatchable energy of each flywheel energy storage unit, the upper limit of the dispatchable energy, and the maximum chargeable / dischargeable power, and uploading the maximum frequency regulation power to the power grid. This solution enables immediate execution of corresponding charge / discharge actions based on the frequency regulation command after the power grid triggers a primary frequency regulation demand, thereby improving the response speed of flywheel energy storage participating in primary frequency regulation.

Description

Technical Field

[0001] This invention relates to the field of flywheel energy storage technology, and in particular to a power reporting method, device, terminal and storage medium for flywheel energy storage participating in primary frequency regulation. Background Technology

[0002] Flywheel energy storage is an electromechanical energy conversion and storage technology that uses a high-speed rotating flywheel rotor to convert electrical energy into kinetic energy for storage, and then converts the kinetic energy back into electrical energy for output when needed by decelerating.

[0003] In power systems, flywheel energy storage is particularly suitable for primary frequency regulation, i.e., rapid power compensation when the grid frequency fluctuates due to imbalances in generation and load. As the first line of defense for frequency control, flywheel energy storage effectively smooths out random fluctuations in new energy sources through high-frequency, short-duration charging and discharging, alleviates equipment wear and energy efficiency degradation in thermal power units caused by frequency regulation, and significantly improves grid stability.

[0004] However, the current operating mode of flywheel energy storage participating in primary frequency regulation still has technical limitations: when the grid triggers a primary frequency regulation demand, the frequency regulation command is transmitted to the flywheel energy storage system, which then initiates frequency regulation operations based on its own frequency regulation capabilities. This process makes it difficult for the response speed of flywheel energy storage to match the grid's requirements for the speed of primary frequency regulation, making it unable to respond to frequency regulation in a timely manner and unable to fully utilize its advantages in instantaneous power compensation. Summary of the Invention

[0005] This invention provides a power reporting method, device, terminal, and storage medium for flywheel energy storage participating in primary frequency regulation, in order to solve the problem of slow response speed of flywheel energy storage participating in primary frequency regulation.

[0006] In a first aspect, embodiments of the present invention provide a power reporting method for flywheel energy storage participating in primary frequency regulation, comprising:

[0007] The frequency regulation time for the flywheel energy storage array to participate in primary frequency regulation, as specified by the power grid, is obtained; the flywheel energy storage array includes multiple flywheel energy storage units.

[0008] Based on the frequency modulation time and the maximum frequency modulation time of the flywheel energy storage unit, determine the upper limit of the dispatch energy of the flywheel energy storage unit;

[0009] The schedulable energy of each flywheel energy storage unit in the flywheel energy storage array is limited by the aforementioned upper limit of schedulable energy.

[0010] Based on the dispatchable energy of each flywheel energy storage unit after limiting, the upper limit of the dispatchable energy, and the maximum chargeable / dischargeable power, the maximum frequency regulation power of the flywheel energy storage array is determined, and the maximum frequency regulation power is uploaded to the power grid.

[0011] Secondly, embodiments of the present invention provide a power reporting device for flywheel energy storage participating in primary frequency regulation, comprising:

[0012] The frequency regulation time acquisition module is used to acquire the frequency regulation time of the flywheel energy storage array participating in the primary frequency regulation, which is issued by the power grid; the flywheel energy storage array includes multiple flywheel energy storage units.

[0013] The scheduling energy upper limit determination module is used to determine the scheduling energy upper limit of the flywheel energy storage unit based on the frequency regulation time and the maximum frequency regulation time of the flywheel energy storage unit;

[0014] An energy limiting module is used to limit the schedulable energy of each flywheel energy storage unit in the flywheel energy storage array using the upper limit value of the schedulable energy.

[0015] The power uploading module is used to determine the maximum frequency regulation power of the flywheel energy storage array based on the dispatchable energy of each flywheel energy storage unit after limiting, the upper limit of the dispatchable energy, and the maximum chargeable and dischargeable power, and to upload the maximum frequency regulation power to the power grid.

[0016] Thirdly, embodiments of the present invention provide a terminal, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the power reporting method for flywheel energy storage participating in primary frequency regulation as described in any possible implementation of the first aspect above.

[0017] Fourthly, embodiments of the present invention provide a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the power reporting method for flywheel energy storage participating in primary frequency regulation as described in any possible implementation of the first aspect above.

[0018] This invention provides a power reporting method, apparatus, terminal, and storage medium for flywheel energy storage participating in primary frequency regulation. The method first obtains the frequency regulation time of the flywheel energy storage array participating in primary frequency regulation from the power grid; then, based on the frequency regulation time and the maximum frequency regulation time of the flywheel energy storage unit, it determines the upper limit of the dispatchable energy of the flywheel energy storage unit; it uses the upper limit of the dispatchable energy to limit the dispatchable energy of each flywheel energy storage unit in the flywheel energy storage array; finally, based on the limited dispatchable energy of each flywheel energy storage unit, the upper limit of the dispatchable energy, and the maximum chargeable / dischargeable power, it determines the maximum frequency regulation power of the flywheel energy storage array and uploads the maximum frequency regulation power to the power grid. This method, by having the flywheel energy storage array actively report its frequency regulation capability, enables it to immediately execute corresponding charging and discharging actions based on the frequency regulation command after the power grid triggers a primary frequency regulation demand, thereby shortening the frequency regulation response time and improving the response speed of flywheel energy storage participating in primary frequency regulation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a flowchart illustrating the implementation of the power reporting method for flywheel energy storage participating in primary frequency regulation provided in this embodiment of the invention.

[0021] Figure 2 This is a schematic diagram of the power reporting device for flywheel energy storage participating in primary frequency regulation provided in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the terminal provided in an embodiment of the present invention. Detailed Implementation

[0023] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0024] To make the objectives, technical solutions, and advantages of the present invention clearer, specific embodiments will be described below in conjunction with the accompanying drawings.

[0025] Primary frequency regulation refers to the adjustment process in a power system used for rapid response to frequency deviations, stabilizing the system frequency by adjusting generation or load power. When flywheel energy storage units participate in primary frequency regulation, the traditional frequency regulation strategy typically involves the grid dispatch center acquiring real-time frequency data through frequency acquisition devices distributed at different nodes, and then using a background algorithm to determine whether the frequency deviation has reached the primary frequency regulation initiation threshold. If so, a frequency regulation command is issued to the flywheel energy storage system. After receiving the frequency regulation command, the dispatch center of the flywheel energy storage system does not directly initiate frequency regulation. Instead, it first needs to collect the real-time status of each flywheel energy storage system, including whether there is a fault and the current remaining energy. Then, it determines the compensation power share of each flywheel energy storage system through a load allocation algorithm (such as allocation based on capacity ratio or allocation based on response speed priority). This process requires waiting for status feedback from each system and completing algorithm calculations, thus reducing the overall response speed.

[0026] To avoid the above problems, this embodiment provides a power reporting method for flywheel energy storage to participate in primary frequency regulation. The execution subject of this method can be the control terminal of the flywheel energy storage system. The flywheel energy storage system includes a flywheel energy storage array, which includes multiple flywheel energy storage units connected in parallel. Each flywheel energy storage unit can be connected to the power grid through a grid-connected inverter after being connected in parallel, and participate in the primary frequency regulation of the power grid.

[0027] Figure 1 This is a flowchart illustrating the power reporting method for flywheel energy storage participating in primary frequency regulation, provided in an embodiment of the present invention. Figure 1 As shown, the process of this method is described in detail below:

[0028] S101: Obtain the frequency regulation time of the flywheel energy storage array participating in the primary frequency regulation as issued by the power grid; the flywheel energy storage array includes multiple flywheel energy storage units.

[0029] Specifically, the power grid dispatch center determines a time that can meet most short-term high-frequency discharges based on the power grid operating conditions, and uses this time as the frequency regulation time, which is then sent to the control terminal of the flywheel energy storage system.

[0030] In this embodiment, the power grid dispatch center can pre-store the standard frequency regulation time of the power grid under different load scenarios, match the corresponding frequency regulation time according to the current power grid load status, and send the frequency regulation time to the flywheel energy storage system.

[0031] In order to determine the frequency regulation time in advance, this embodiment can also predict the load data for the next time period based on the next time period, the current date and the current load curve, and match the corresponding frequency regulation time based on the load data for the next time period.

[0032] Specifically, time periods can be divided into peak periods, off-peak periods, and normal periods. Dates can be divided into weekdays and holidays. The power grid dispatch center can predict the load data for the next time period based on the type of the next time period, the type of the current date, and the load curve trend of the current time period. This prediction process can be determined based on a neural network model.

[0033] S102: Determine the upper limit of the scheduling energy of the flywheel energy storage unit based on the frequency modulation time and the maximum frequency modulation time of the flywheel energy storage unit.

[0034] In this embodiment, the maximum frequency regulation time is the frequency regulation time corresponding to the flywheel energy storage unit's dispatchable energy being at full scale. Dispatchable energy is the energy that the flywheel energy storage unit can use for frequency regulation in its current state. In the charging state, the dispatchable energy is the difference between the full-scale energy and the remaining energy; in the discharging state, the dispatchable energy is the remaining energy. The upper limit of the dispatchable energy of the flywheel energy storage unit is the maximum energy that the unit can call upon in this frequency regulation, determined based on the grid frequency regulation time and the maximum frequency regulation capability of a single flywheel energy storage unit, thus avoiding excessive energy consumption or insufficient energy.

[0035] In one possible implementation, the specific implementation process of S102 includes:

[0036] The upper limit of the dispatch energy of the flywheel energy storage unit is determined based on the ratio of the frequency regulation time to the maximum frequency regulation time of the flywheel energy storage unit.

[0037] Specifically, in this embodiment, the ratio of the frequency modulation time to the maximum frequency modulation time can be determined, and the upper limit of the dispatch energy of the flywheel energy storage unit can be determined based on the ratio and the full-scale energy of the flywheel energy storage unit.

[0038] In this embodiment, the energy can be the SOC (State of Charge) value, the full-scale energy can be 100%, or the actual full-scale energy of the flywheel energy storage unit can be updated based on the health status of the flywheel energy storage unit and the initial full-scale energy (100%).

[0039] In one possible implementation, the specific implementation process of S102 above further includes:

[0040] According to the formula Determine the upper limit of the scheduling energy of the flywheel energy storage unit;

[0041] in, This represents the upper limit of the scheduling energy. This indicates the frequency modulation time. This indicates the maximum frequency modulation time. This represents the full-scale energy of the flywheel energy storage unit; SOC 0 indicates reserved energy.

[0042] In this embodiment, the above .

[0043] S103: The schedulable energy of each flywheel energy storage unit in the flywheel energy storage array is limited using the upper limit value of the schedulable energy.

[0044] In this embodiment, when the dispatchable energy of a flywheel energy storage unit is greater than the upper limit of dispatchable energy, the upper limit of dispatchable energy is used as the dispatchable energy of the flywheel energy storage unit to prevent the unit from exceeding its power limit due to excessive dispatchable energy.

[0045] Specifically, taking the discharge state as an example, after limiting the dispatchable energy of the flywheel energy storage unit by adopting the upper limit of dispatchable energy, when the frequency regulation time arrives, the flywheel energy storage unit with a SOC value lower than the upper limit of dispatchable energy will be discharged to zero, which is not conducive to the energy balance among the various flywheel energy storage units. Therefore, it is possible to set... For example, It is 10%.

[0046] S104: Based on the schedulable energy of each flywheel energy storage unit after limiting, the upper limit of the schedulable energy, and the maximum chargeable / dischargeable power, determine the maximum frequency regulation power of the flywheel energy storage array, and upload the maximum frequency regulation power to the power grid.

[0047] In this embodiment, the charging and discharging power of each flywheel energy storage unit can be determined based on the schedulable energy and the maximum chargeable and dischargeable energy of each flywheel energy storage unit in the flywheel energy storage array. Then, the charging and discharging power of all flywheel energy storage units is summed to obtain the maximum frequency modulation power of the entire flywheel energy storage array.

[0048] Finally, the maximum frequency regulation power of the flywheel energy storage array is uploaded to the power grid dispatch center. When the power grid dispatch center detects that a frequency regulation is required, it issues a frequency regulation command. The flywheel energy storage array then directly participates in the frequency regulation work based on the frequency regulation power of each flywheel energy storage unit calculated in advance, thereby improving the frequency regulation response speed of the flywheel energy storage array.

[0049] As can be seen from the above embodiments, this embodiment breaks through the passive response mode of the energy storage system after the grid issues a command by actively acquiring the frequency regulation time, accurately determining the energy upper limit, limiting and optimizing the dispatchable energy, and calculating and reporting the maximum frequency regulation power through a closed-loop process. Specifically, by calculating and reporting the maximum frequency regulation power in advance based on the grid's frequency regulation needs, this embodiment enables the grid to issue execution commands directly based on the reported power value without waiting for the flywheel energy storage system's status detection and power allocation when triggering primary frequency regulation, significantly shortening the response delay of command execution. On the other hand, by limiting the dispatchable energy by the upper limit of the dispatchable energy, it avoids some flywheel energy storage units from having insufficient subsequent frequency regulation capabilities due to excessive energy consumption, or from wasting resources due to energy redundancy, ensuring that the overall frequency regulation capability of the array is accurately matched with the grid demand. This not only improves the response speed of flywheel energy storage participating in primary frequency regulation, but also ensures the stability and continuity of the frequency regulation process.

[0050] In one possible implementation, prior to S103, the method provided in this embodiment further includes:

[0051] The flywheel energy storage unit in the flywheel energy storage array with schedulable energy less than a first preset energy is designated as the first flywheel energy storage unit; the first flywheel energy storage unit is removed from the flywheel energy storage array;

[0052] In the charging state, the dispatchable energy is the difference between the full-scale energy and the remaining energy of the flywheel energy storage unit; in the discharging state, the dispatchable energy is the remaining energy of the flywheel energy storage unit.

[0053] In this embodiment, the first preset energy is the energy threshold used to screen flywheel energy storage units. Flywheel energy storage units with schedulable energy lower than this value are determined to lack effective frequency regulation capability.

[0054] Specifically, when the flywheel energy storage array needs to discharge to provide power support to the grid, the control terminal monitors the remaining energy of each flywheel energy storage unit and determines whether the remaining energy is less than a first preset energy. If the remaining energy is less than the first preset energy, the flywheel energy storage unit is designated as the first flywheel energy storage unit and removed from the grid. When the flywheel energy storage needs to charge to absorb excess power from the grid, the control terminal monitors the rechargeable energy of each flywheel energy storage unit, which is the value of full-scale energy minus the remaining energy. Then, flywheel energy storage units with rechargeable energy less than the first preset energy are designated as the first flywheel energy storage units and removed from the grid.

[0055] In this embodiment, the first preset energy can be a fixed value or it can be adaptively adjusted based on the frequency modulation time. The longer the frequency modulation time, the greater the first preset energy; the shorter the frequency modulation time, the smaller the first preset energy.

[0056] Specifically, the first preset energy can be 5% to 15%.

[0057] In traditional fixed-time frequency regulation strategies, if flywheel energy storage units that are nearly depleted of energy are still forced to participate in frequency regulation, they may rapidly enter a deep discharge / overcharge state, accelerating equipment aging or even causing failure. This embodiment can ensure the continuous stability of primary frequency regulation, avoiding the problem of frequent start-stops caused by insufficient dispatchable energy of the flywheel energy storage units participating in frequency regulation and the frequency regulation power frequently falling below the minimum power limit during the frequency regulation process. It also prevents frequency regulation interruptions from causing aggravated grid frequency fluctuations, ensuring that the primary frequency regulation task of the power grid can be completed continuously and stably, and maintaining the stable operation of the grid frequency.

[0058] In one possible implementation, before designating flywheel energy storage units in the flywheel energy storage array with schedulable energy less than a first preset energy as the first flywheel energy storage unit, and before removing the first flywheel energy storage unit from the flywheel energy storage array, the method provided in this embodiment further includes:

[0059] The first preset energy is determined based on the frequency modulation time, and the frequency modulation time is positively correlated with the first preset energy.

[0060] Specifically, the frequency modulation time and the first preset energy can be directly proportional, or they can be calculated using a formula. Calculate the first preset energy corresponding to the current frequency modulation time; where, Indicates the first preset energy. This represents the initial energy, expressed as a percentage of energy, which can be 5% to 10%. r The unit of regulation energy can be 1% to 2%; t represents the frequency modulation time, in minutes or hours.

[0061] In one possible implementation, the specific implementation process of S104 includes:

[0062] Based on formula Calculate the charging and discharging power of each flywheel energy storage unit;

[0063] The maximum frequency modulation power of the flywheel energy storage array is obtained by summing the charging and discharging power of each flywheel energy storage unit.

[0064] in, Indicates the first i The charging and discharging power of each flywheel energy storage unit Indicates the first i Dispatchable energy of each flywheel energy storage unit This indicates the maximum chargeable / dischargeable power; This represents the upper limit of the scheduling energy.

[0065] The aforementioned technical solution calculates the charging and discharging power of a single flywheel energy storage unit using a specific formula, and then sums these values ​​to obtain the maximum frequency regulation power of the flywheel energy storage array. This solves the problem of insufficient accuracy caused by traditional total power estimation, ensuring that the reported maximum frequency regulation power accurately reflects the array's actual frequency regulation capability and preventing frequency regulation strategy failure due to power misjudgment by the power grid. Furthermore, the differentiated adaptation of charging and discharging states further improves the reliability of power calculation, ensuring the accuracy and stability of reported data. This provides precise data support for the power grid to quickly initiate primary frequency regulation, indirectly shortening the overall frequency regulation response time.

[0066] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0067] The following are device embodiments of the present invention. For details not described in detail, please refer to the corresponding method embodiments described above.

[0068] Figure 2 The diagram shows a schematic of a power reporting device for flywheel energy storage participating in primary frequency regulation, as provided in an embodiment of the present invention. For ease of explanation, only the parts relevant to the embodiment of the present invention are shown, and are described in detail below:

[0069] like Figure 2 As shown, the power reporting device 100 for flywheel energy storage participating in primary frequency regulation includes:

[0070] The frequency regulation time acquisition module 110 is used to acquire the frequency regulation time of the flywheel energy storage array participating in the primary frequency regulation, which is issued by the power grid; the flywheel energy storage array includes multiple flywheel energy storage units.

[0071] The scheduling energy upper limit determination module 120 is used to determine the scheduling energy upper limit of the flywheel energy storage unit based on the frequency regulation time and the maximum frequency regulation time of the flywheel energy storage unit;

[0072] The energy limiting module 130 is used to limit the schedulable energy of each flywheel energy storage unit in the flywheel energy storage array using the upper limit value of the schedulable energy.

[0073] The power uploading module 140 is used to determine the maximum frequency regulation power of the flywheel energy storage array based on the schedulable energy of each flywheel energy storage unit after limiting, the upper limit of the schedulable energy, and the maximum chargeable and dischargeable power, and to upload the maximum frequency regulation power to the power grid.

[0074] In one possible implementation, the device 100 further includes:

[0075] The elimination module is used to identify flywheel energy storage units in the flywheel energy storage array whose schedulable energy is less than a first preset energy as first flywheel energy storage units; and to eliminate the first flywheel energy storage units from the flywheel energy storage array.

[0076] In the charging state, the dispatchable energy is the difference between the full-scale energy and the remaining energy of the flywheel energy storage unit; in the discharging state, the dispatchable energy is the remaining energy of the flywheel energy storage unit.

[0077] In one possible implementation, the device 100 further includes:

[0078] The first preset energy determination module is used to determine the first preset energy based on the frequency modulation time, wherein the frequency modulation time is positively correlated with the first preset energy.

[0079] In one possible implementation, the scheduling energy upper limit determination module 120 includes:

[0080] The upper limit of the dispatch energy of the flywheel energy storage unit is determined based on the ratio of the frequency regulation time to the maximum frequency regulation time of the flywheel energy storage unit.

[0081] In one possible implementation, the scheduling energy upper limit determination module 120 is specifically used for:

[0082] According to the formula Determine the upper limit of the scheduling energy of the flywheel energy storage unit;

[0083] in, This represents the upper limit of the scheduling energy. This indicates the frequency modulation time. This indicates the maximum frequency modulation time. This represents the full-scale energy of the flywheel energy storage unit; SOC 0 indicates reserved energy.

[0084] In one possible implementation, the power upload module 140 includes:

[0085] Based on formula Calculate the charging and discharging power of each flywheel energy storage unit;

[0086] The maximum frequency modulation power of the flywheel energy storage array is obtained by summing the charging and discharging power of each flywheel energy storage unit.

[0087] in, Indicates the first i The charging and discharging power of each flywheel energy storage unit Indicates the first i Dispatchable energy of each flywheel energy storage unit This indicates the maximum chargeable / dischargeable power; This indicates the upper limit of the schedulable energy; in the charging state, the schedulable energy is the difference between the full-scale energy and the remaining energy of the flywheel energy storage unit; in the discharging state, the schedulable energy is the remaining energy of the flywheel energy storage unit.

[0088] Figure 3 This is a schematic diagram of a terminal provided in an embodiment of the present invention. Figure 3 As shown, the terminal 3 in this embodiment includes: a processor 30, a memory 31, and a computer program 32 stored in the memory 31 and executable on the processor 30. When the processor 30 executes the computer program 32, it implements the steps in the power reporting methods embodiments for flywheel energy storage participating in primary frequency regulation described above, for example... Figure 1 Steps S101 to S104 are shown. Alternatively, when the processor 30 executes the computer program 32, it implements the functions of each module / unit in the above-described device embodiments, for example... Figure 2The functions of modules 110 to 140 are shown.

[0089] For example, the computer program 32 can be divided into one or more modules / units, which are stored in the memory 31 and executed by the processor 30 to complete the present invention. The one or more modules / units can be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program 32 in the terminal 3.

[0090] The terminal 3 can be a desktop computer, laptop, handheld computer, or cloud server, etc. The terminal 3 may include, but is not limited to, a processor 30 and a memory 31. Those skilled in the art will understand that... Figure 3 This is merely an example of terminal 3 and does not constitute a limitation on terminal 3. It may include more or fewer components than shown, or combine certain components, or different components. For example, the terminal may also include input / output devices, network access devices, buses, etc.

[0091] The processor 30 may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0092] The memory 31 can be an internal storage unit of the terminal 3, such as a hard disk or memory of the terminal 3. The memory 31 can also be an external storage device of the terminal 3, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the terminal 3. Furthermore, the memory 31 can include both internal storage units and external storage devices of the terminal 3. The memory 31 is used to store the computer program and other programs and data required by the terminal. The memory 31 can also be used to temporarily store data that has been output or will be output.

[0093] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0094] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0095] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0096] In the embodiments provided by this invention, it should be understood that the disclosed devices / terminals and methods can be implemented in other ways. For example, the device / terminal embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0097] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0098] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0099] If the integrated module / unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the above embodiments of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium. When executed by a processor, the computer program can implement the steps of the above embodiments of the power reporting method for each flywheel energy storage participating in primary frequency regulation. The computer program includes computer program code, which can be in the form of source code, object code, executable file, or some intermediate form. The computer-readable medium can include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc.

[0100] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A power reporting method for flywheel energy storage participating in primary frequency regulation, characterized in that, include: Obtain the frequency regulation time for the flywheel energy storage array to participate in primary frequency regulation, as specified by the power grid; The flywheel energy storage array includes multiple flywheel energy storage units; Based on the frequency modulation time and the maximum frequency modulation time of the flywheel energy storage unit, determine the upper limit of the dispatch energy of the flywheel energy storage unit; The schedulable energy of each flywheel energy storage unit in the flywheel energy storage array is limited by the aforementioned upper limit of schedulable energy. Based on the dispatchable energy of each flywheel energy storage unit after limiting, the upper limit of the dispatchable energy, and the maximum chargeable and dischargeable power, the maximum frequency regulation power of the flywheel energy storage array is determined, and the maximum frequency regulation power is uploaded to the power grid. The step of determining the upper limit of the dispatchable energy of the flywheel energy storage unit based on the frequency modulation time and the maximum frequency modulation time of the flywheel energy storage unit includes: According to the formula Determine the upper limit of the scheduling energy of the flywheel energy storage unit; in, This represents the upper limit of the scheduling energy. This indicates the frequency modulation time. This indicates the maximum frequency modulation time. This represents the full-scale energy of the flywheel energy storage unit; SOC 0 indicates reserved energy.

2. The power reporting method for flywheel energy storage participating in primary frequency regulation according to claim 1, characterized in that, Before limiting the schedulable energy of each flywheel energy storage unit in the flywheel energy storage array using the aforementioned schedulable energy upper limit, the method further includes: The flywheel energy storage unit in the flywheel energy storage array with schedulable energy less than a first preset energy is designated as the first flywheel energy storage unit; the first flywheel energy storage unit is removed from the flywheel energy storage array; In the charging state, the dispatchable energy is the difference between the full-scale energy and the remaining energy of the flywheel energy storage unit; in the discharging state, the dispatchable energy is the remaining energy of the flywheel energy storage unit.

3. The power reporting method for flywheel energy storage participating in primary frequency regulation according to claim 2, characterized in that, The flywheel energy storage unit in the flywheel energy storage array whose schedulable energy is less than a first preset energy is designated as the first flywheel energy storage unit; Before removing the first flywheel energy storage unit from the flywheel energy storage array, the method further includes: The first preset energy is determined based on the frequency modulation time, and the frequency modulation time is positively correlated with the first preset energy.

4. The power reporting method for flywheel energy storage participating in primary frequency regulation according to claim 1, characterized in that, The determination of the maximum frequency modulation power of the flywheel energy storage array based on the schedulable energy of each flywheel energy storage unit after limiting, the upper limit of the schedulable energy, and the maximum chargeable / dischargeable power includes: Based on formula Calculate the charging and discharging power of each flywheel energy storage unit; The maximum frequency modulation power of the flywheel energy storage array is obtained by summing the charging and discharging power of each flywheel energy storage unit. in, Indicates the first i The charging and discharging power of each flywheel energy storage unit Indicates the first i Dispatchable energy of each flywheel energy storage unit This indicates the maximum chargeable / dischargeable power; The upper limit of the schedulable energy is indicated; in the charging state, the schedulable energy is the difference between the full-scale energy and the remaining energy of the flywheel energy storage unit; in the discharging state, the schedulable energy is the remaining energy of the flywheel energy storage unit.

5. A power reporting device for flywheel energy storage participating in primary frequency regulation, characterized in that, include: The frequency regulation time acquisition module is used to acquire the frequency regulation time of the flywheel energy storage array participating in the primary frequency regulation as issued by the power grid; The flywheel energy storage array includes multiple flywheel energy storage units; The scheduling energy upper limit determination module is used to determine the scheduling energy upper limit of the flywheel energy storage unit based on the frequency regulation time and the maximum frequency regulation time of the flywheel energy storage unit; An energy limiting module is used to limit the schedulable energy of each flywheel energy storage unit in the flywheel energy storage array using the upper limit value of the schedulable energy. The power uploading module is used to determine the maximum frequency regulation power of the flywheel energy storage array based on the dispatchable energy of each flywheel energy storage unit after limiting, the upper limit of the dispatchable energy, and the maximum chargeable and dischargeable power, and to upload the maximum frequency regulation power to the power grid; The scheduling energy upper limit determination module includes: According to the formula Determine the upper limit of the scheduling energy of the flywheel energy storage unit; in, This represents the upper limit of the scheduling energy. This indicates the frequency modulation time. This indicates the maximum frequency modulation time. This represents the full-scale energy of the flywheel energy storage unit; SOC 0 indicates reserved energy.

6. The power reporting device for flywheel energy storage participating in primary frequency regulation according to claim 5, characterized in that, The device further includes: The elimination module is used to identify flywheel energy storage units in the flywheel energy storage array whose schedulable energy is less than a first preset energy as first flywheel energy storage units; and to eliminate the first flywheel energy storage units from the flywheel energy storage array. In the charging state, the dispatchable energy is the difference between the full-scale energy and the remaining energy of the flywheel energy storage unit; in the discharging state, the dispatchable energy is the remaining energy of the flywheel energy storage unit.

7. A terminal, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the power reporting method for flywheel energy storage participating in primary frequency regulation as described in any one of claims 1 to 4.

8. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the power reporting method for flywheel energy storage participating in primary frequency regulation as described in any one of claims 1 to 4.

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