Synchronous grid minimum scale evaluation method and device, electronic equipment and storage medium

Abstract

This invention discloses a method, apparatus, electronic device, and storage medium for assessing the minimum scale of a synchronous power grid. It addresses the problem in existing related technologies of determining the minimum reasonable scale of a synchronous power grid to ensure reliable power supply to loads as the grid size gradually increases. The method includes: acquiring key parameter information of the regional power grid; based on the key parameter information, a preset maximum frequency recovery deviation, the primary frequency regulation capability of the generating units, and the primary frequency regulation capability of the load; statistically analyzing the DC frequency limit control value corresponding to the preset maximum frequency recovery deviation; determining whether the regional power grid meets the minimum scale condition; if not, calculating the minimum load of the regional power grid based on the key parameter information, the primary frequency regulation capability of the generating units, the primary frequency regulation capability of the load, and the DC frequency limit control value, and using the minimum load as the minimum reasonable scale of the regional power grid.

Description

Technical Field

[0001] This invention relates to the field of power grid planning and operation technology, and in particular to a method, apparatus, electronic device and storage medium for assessing the minimum scale of a synchronous power grid. Background Technology

[0002] With the increasing demand for electricity, the load connected to the power grid is also gradually increasing. In order to ensure reliable power supply to the load and fully realize the scale benefits of the power grid, the scale of the power grid is also constantly expanding. However, an excessively large power grid will bring a series of problems, such as: serious mutual interference between AC and DC, insufficient ability to prevent large-scale power outages, large-scale exceedance of short-circuit current, and disordered and uncontrollable power flow caused by the randomness of renewable energy output.

[0003] Currently, determining whether a power grid is at a reasonable size is generally done through simulation calculations. However, this method cannot determine the minimum reasonable size of a synchronous power grid, and its guiding significance for planning issues such as power grid zoning is weak. Therefore, as the power grid size gradually increases, it is urgent to study how to determine the minimum reasonable size of a synchronous power grid to ensure reliable power supply to the load. Summary of the Invention

[0004] This invention provides a method, apparatus, electronic device, and storage medium for assessing the minimum size of a synchronous power grid, which solves or partially solves the problem in existing related technologies of how to determine the minimum reasonable size of a synchronous power grid to ensure reliable power supply to the load when the power grid size gradually increases.

[0005] This invention provides a method for assessing the minimum size of a synchronous power grid, the method comprising:

[0006] Obtain key parameter information of the regional power grid;

[0007] Based on the key parameter information and the preset maximum frequency recovery deviation, the computer group's primary frequency regulation capability and the load's primary frequency regulation capability are determined.

[0008] Calculate the DC frequency limit control value corresponding to the preset maximum frequency recovery deviation;

[0009] Determine whether the regional power grid meets the minimum scale condition. If not, calculate the minimum load of the regional power grid based on the key parameter information, the primary frequency regulation capability of the generating unit, the primary frequency regulation capability of the load, and the DC frequency limit control value, and use the minimum load as the minimum reasonable scale of the regional power grid.

[0010] Optionally, the key parameter information includes the installed capacity of the generating units, the load, the maximum single component failure system power loss, the primary frequency regulation coefficient of the generating units, the primary frequency regulation coefficient of the load, and the base frequency of the regional power grid.

[0011] Optionally, the step of determining the primary frequency regulation capability of the computer group and the primary frequency regulation capability of the load based on the key parameter information and the preset maximum frequency recovery deviation includes:

[0012] The primary frequency regulation capability of the computer group is determined based on the unit's assembly capacity and the unit's primary frequency regulation coefficient.

[0013] The primary frequency regulation capability of the load is calculated based on the primary frequency regulation coefficient of the load, the base frequency, the load amount, and the preset maximum frequency recovery deviation.

[0014] Optionally, the formula for calculating the primary frequency regulation capability of the unit is as follows:

[0015] Mg = Kg * Sg

[0016] The formula for calculating the primary frequency regulation capability of the load is as follows:

[0017]

[0018] Where Mg represents the unit's primary frequency regulation capability, Kg represents the unit's primary frequency regulation coefficient, Sg represents the unit's installed capacity, Ml represents the load's primary frequency regulation capability, Kl represents the load's primary frequency regulation coefficient, fbase represents the base frequency, Pload represents the load, and Δf represents the preset maximum frequency recovery deviation.

[0019] Optionally, determining whether the regional power grid meets the minimum size condition includes:

[0020] By determining whether the sum of the DC frequency limit control value, the unit's primary frequency regulation capability, and the load's primary frequency regulation capability is greater than the maximum single component failure system power loss, it can be determined whether the regional power grid meets the minimum reasonable scale requirement of a synchronous power grid.

[0021] Optionally, calculating the minimum load of the regional power grid based on the key parameter information, the primary frequency regulation capability of the generating unit, the primary frequency regulation capability of the load, and the DC frequency limit control value includes:

[0022] Based on the maximum single-component failure system power loss, the unit's primary frequency regulation capability, the load's primary frequency regulation capability, and the DC frequency limit control value, the minimum load of the regional power grid is calculated using the following formula:

[0023]

[0024] Wherein, Ploadmin represents the minimum load of the regional power grid, Pload represents the load, Ploss represents the maximum power loss of the system due to a single component failure, Mg represents the primary frequency regulation capability of the unit, Ml represents the primary frequency regulation capability of the load, and Mflc represents the DC frequency limit control value.

[0025] Optionally, the method further includes:

[0026] If the sum of the DC frequency limit control value, the unit's primary frequency regulation capability, and the load's primary frequency regulation capability is greater than the maximum single component failure system power loss, then the regional power grid is determined to meet the minimum reasonable scale requirement of a synchronous power grid, and the process ends.

[0027] The present invention also provides a minimum scale assessment device for synchronous power grids, comprising:

[0028] The key parameter information acquisition module is used to acquire key parameter information of the regional power grid;

[0029] The primary frequency regulation capability calculation module is used to calculate the primary frequency regulation capability of the computer group and the primary frequency regulation capability of the load based on the key parameter information and the preset maximum frequency recovery deviation.

[0030] The DC frequency limit control value statistics module is used to count the DC frequency limit control value corresponding to the preset maximum frequency recovery deviation;

[0031] The minimum scale condition judgment module is used to determine whether the regional power grid meets the minimum scale condition. If it does not meet the condition, the minimum load of the regional power grid is calculated based on the key parameter information, the primary frequency regulation capability of the generating unit, the primary frequency regulation capability of the load, and the DC frequency limit control value. The minimum load is then used as the minimum reasonable scale of the regional power grid.

[0032] The present invention also provides an electronic device, the device comprising a processor and a memory:

[0033] The memory is used to store program code and transmit the program code to the processor;

[0034] The processor is used to execute the synchronous grid minimum size assessment method as described above, according to the instructions in the program code.

[0035] The present invention also provides a computer-readable storage medium for storing program code for executing the synchronous grid minimum size assessment method as described in any of the preceding claims.

[0036] As can be seen from the above technical solutions, the present invention has the following advantages:

[0037] A method for assessing the minimum size of a synchronous power grid based on frequency stability is proposed. In the process of assessing the minimum size of a synchronous power grid, only key information such as the generating units and loads of the power grid is needed to determine the minimum reasonable size of the synchronous power grid, which can provide an important basis for the rational zoning of the power grid and the optimization of the power grid structure. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, 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.

[0039] Figure 1 A flowchart illustrating the steps of a method for assessing the minimum size of a synchronous power grid, as provided in an embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of the overall process of a method for assessing the minimum size of a synchronous power grid, provided by an embodiment of the present invention.

[0041] Figure 3 This is a structural block diagram of a minimum scale assessment device for a synchronous power grid provided in an embodiment of the present invention. Detailed Implementation

[0042] This invention provides a method, apparatus, electronic device, and storage medium for assessing the minimum size of a synchronous power grid, which solves or partially solves the problem in existing related technologies of how to determine the minimum reasonable size of a synchronous power grid to ensure reliable power supply to the load when the power grid size gradually increases.

[0043] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0044] As an example, with the increasing demand for electricity, the load connected to the power grid is also gradually increasing. In order to ensure reliable power supply to the load and fully utilize the scale benefits of the power grid, the scale of the power grid is also constantly expanding. However, an excessively large power grid will bring a series of problems, such as: serious mutual interference between AC and DC, insufficient ability to prevent large-scale power outages, large-scale exceedance of short-circuit current, and disordered and uncontrollable power flow caused by the randomness of renewable energy output.

[0045] Currently, determining whether a power grid is at a reasonable size generally relies on simulation calculations. However, this method cannot determine the minimum reasonable size of a synchronous power grid, thus offering limited guidance for planning issues such as power grid zoning. Therefore, as the power grid size gradually increases, it is urgent to study how to determine the minimum reasonable size of a synchronous power grid to ensure reliable power supply to loads.

[0046] Therefore, one of the core inventive points of this invention is: based on the principle that the system recovery frequency meets the requirements after a single component failure in the power grid, a method for evaluating the minimum scale of a synchronous power grid based on frequency stability is proposed. First, key parameter information of the regional power grid is obtained. Then, based on the key parameter information, the preset maximum frequency recovery deviation, the primary frequency regulation capability of the generating units, and the primary frequency regulation capability of the loads, the DC frequency limit control value corresponding to the preset maximum frequency recovery deviation is calculated, and it is determined whether the regional power grid meets the minimum scale condition. If not, the minimum load of the regional power grid is calculated based on the key parameter information, the primary frequency regulation capability of the generating units, the primary frequency regulation capability of the loads, and the DC frequency limit control value. This minimum load is then used as the minimum reasonable scale of the regional power grid. Using this invention, the minimum reasonable scale of the synchronous power grid can be determined solely through key information such as the generating units and loads of the power grid, thus providing an important basis for the rational zoning of the power grid and optimization of its structure.

[0047] Reference Figure 1 The diagram illustrates a flowchart of a method for assessing the minimum size of a synchronous power grid according to an embodiment of the present invention, which may specifically include the following steps:

[0048] Step 101: Obtain key parameter information of the regional power grid;

[0049] In practical applications, when it is necessary to determine the minimum reasonable size of a power grid in a certain area, the key parameter information of the power grid in that area can be obtained. Furthermore, the key parameter information can at least include the installed capacity of the generating units Sg, the load Pload, the maximum single component failure system power loss Ploss, the primary frequency regulation coefficient of the generating units Kg, the primary frequency regulation coefficient of the load Kl, and the base frequency fbase of the power grid in the area.

[0050] Since the power components of the power grid are fixed, when determining the above key parameter information, it is only necessary to determine the largest power component, which is generally expressed as DC capacity. The power loss of the system due to the failure of the largest single component is only related to the component and is not related to the system.

[0051] For example, in this embodiment of the invention, the unit's installed capacity Sg = 76.1 million kilowatts, load Pload = 83.936 million kilowatts, maximum single component failure system power loss Ploss = 5 million kilowatts, unit primary frequency regulation coefficient Kg = 0.042, and load primary frequency regulation coefficient Kl = 1.8.

[0052] The base frequency of the regional power grid refers to the frequency of alternating current, that is, the frequency of the periodic changes in current and voltage. The frequency of alternating current is usually set to 50Hz or 60Hz. In this embodiment of the invention, the base frequency of the regional power grid is fbase = 50Hz.

[0053] Step 102: Based on the key parameter information and the preset maximum frequency recovery deviation, determine the primary frequency regulation capability of the computer group and the primary frequency regulation capability of the load;

[0054] Before conducting a minimum scale assessment, a maximum permissible recovery frequency deviation Δf (i.e., the preset maximum frequency recovery deviation) can be pre-set according to actual operating requirements. In this embodiment of the invention, Δf is set to 0.2Hz, which is basically equal to the primary frequency regulation dead zone of the generator. It should be noted that the maximum permissible recovery frequency deviation Δf can also be set to other suitable values. It is understood that the present invention does not limit this.

[0055] Furthermore, based on key parameter information and the preset maximum frequency recovery deviation, the primary frequency regulation capability of the computer group and the primary frequency regulation capability of the load can be defined as follows:

[0056] First, based on the unit's installed capacity Sg and primary frequency regulation coefficient Kg, the primary frequency regulation capability Mg of the computer unit can be calculated using the following formula:

[0057] Mg = Kg * Sg

[0058] Simultaneously, the load primary frequency regulation capability Ml can be calculated based on the load primary frequency regulation coefficient Kl, the base frequency fbase, the load Pload, and the preset maximum frequency recovery deviation Δf. The calculation formula is shown below:

[0059]

[0060] In this embodiment of the invention, the primary frequency regulation capacity of the unit, Mg = 3,196,200 kW, and the primary frequency regulation capacity of the load, Ml = 604,300 kW, can be obtained through calculation.

[0061] Step 103: Calculate the DC frequency limit control value corresponding to the preset maximum frequency recovery deviation;

[0062] Next, the DC FLC (Frequency Limit Control) regulation capability, i.e., the DC frequency limit control value Mflc, can be statistically analyzed when the frequency deviation is Δf. This value is based on actual power grid statistics. In this embodiment of the invention, Mflc = 0.

[0063] Step 104: Determine whether the regional power grid meets the minimum scale condition. If not, calculate the minimum load of the regional power grid based on the key parameter information, the primary frequency regulation capability of the generating unit, the primary frequency regulation capability of the load, and the DC frequency limit control value, and use the minimum load as the minimum reasonable scale of the regional power grid.

[0064] Furthermore, in this step, it is determined whether the regional power grid meets the minimum scale requirement. Specifically, this is done by determining whether the sum of the DC frequency limit control value Mflc, the unit primary frequency regulation capability Mg, and the load primary frequency regulation capability Ml is greater than the maximum single component failure system power loss Ploss, in order to determine whether the regional power grid meets the minimum reasonable scale requirement of the synchronous power grid.

[0065] Specifically, when the sum of the DC frequency limit control value Mflc, the unit's primary frequency regulation capability Mg, and the load's primary frequency regulation capability Ml is greater than the maximum single component failure system power loss Ploss, i.e., Ploss < Mflc + Mg + Ml, it is determined that the regional power grid meets the minimum reasonable scale requirement of the synchronous power grid. At this time, there is no need to adjust the power of the regional power grid, and the process ends.

[0066] When the sum of the DC frequency limit control value Mflc, the unit's primary frequency regulation capability Mg, and the load's primary frequency regulation capability Ml is less than or equal to the maximum single component failure system power loss Ploss, i.e., Ploss ≥ Mflc + Mg + Ml, it can be determined that the regional power grid does not meet the minimum reasonable scale requirement of the synchronous power grid. At this time, it is necessary to calculate the minimum load Ploadmin that the regional power grid needs to meet the frequency recovery requirement, which is taken as the minimum reasonable scale of the regional power grid.

[0067] In practical implementation, based on key parameter information, the primary frequency regulation capability of the generating unit, the primary frequency regulation capability of the load, and the DC frequency limit control value, the minimum load of the regional power grid is calculated as follows: Based on the maximum single component failure system power loss Ploss, the primary frequency regulation capability of the generating unit Mg, the primary frequency regulation capability of the load Ml, and the DC frequency limit control value Mflc, the minimum load of the regional power grid Ploadmin is calculated using the following formula:

[0068]

[0069] If the example data in this embodiment of the invention does not satisfy Ploss<Mflc+Mg+Ml, then the minimum load of the regional power grid can be calculated using the above formula as Ploadmin=11042.8 MW, that is, the minimum reasonable scale of the regional power grid is 11042.8 MW.

[0070] In this embodiment of the invention, based on the principle that the system recovery frequency meets the requirements after a single component failure in the power grid, a minimum scale assessment method for a synchronous power grid based on frequency stability is proposed. First, key parameter information of the regional power grid is obtained. Then, based on the key parameter information, the preset maximum frequency recovery deviation, the primary frequency regulation capability of the generating units, and the primary frequency regulation capability of the loads, the DC frequency limit control value corresponding to the preset maximum frequency recovery deviation is calculated, and it is determined whether the regional power grid meets the minimum scale condition. If not, the minimum load of the regional power grid is calculated based on the key parameter information, the primary frequency regulation capability of the generating units, the primary frequency regulation capability of the loads, and the DC frequency limit control value. This minimum load is then used as the minimum reasonable scale of the regional power grid. Using this invention, the minimum reasonable scale of the synchronous power grid can be determined using only key information such as the generating units and loads of the power grid, thus providing an important basis for the rational zoning of the power grid and optimization of the power grid structure.

[0071] For better illustration, refer to Figure 2 This diagram illustrates the overall flow of a synchronous power grid minimum scale assessment method provided by an embodiment of the present invention. It should be noted that this embodiment only provides a brief description of the general flow of the synchronous power grid minimum scale assessment. The specific implementation process of each step can be understood by referring to the relevant content in the foregoing embodiments, and will not be elaborated here. It is understood that the present invention does not impose any limitations on this.

[0072] (1) Start the process and count the installed capacity Sg, load Pload, maximum single component failure system power loss Ploss, unit primary frequency regulation coefficient Kg and load primary frequency regulation coefficient Kl of the regional power grid.

[0073] (2) Calculate the base frequency fbase of the regional power grid and set the maximum allowable recovery frequency deviation Δf of the system.

[0074] (3) The primary frequency regulation capability of the computer group Mg, the primary frequency regulation capability of the load Ml, and the statistical DC FLC regulation capability Mflc;

[0075] (4) Determine whether Ploss < Mflc + Mg + Ml is true. If it is true, proceed to step (5); if it is not true, proceed to step (6).

[0076] (5) Determine that the regional power grid meets the minimum reasonable size requirement of the synchronous power grid, and end the process;

[0077] (6) Calculate the minimum load Ploadmin required for the regional power grid to meet the frequency recovery requirements, and use the minimum load Ploadmin as the minimum reasonable size of the regional power grid, then end the process.

[0078] Reference Figure 3 The diagram illustrates a structural block diagram of a synchronous power grid minimum scale assessment device provided by an embodiment of the present invention, which may specifically include:

[0079] The key parameter information acquisition module 301 is used to acquire key parameter information of the regional power grid.

[0080] The primary frequency regulation capability calculation module 302 is used to calculate the primary frequency regulation capability of the computer group and the primary frequency regulation capability of the load based on the key parameter information and the preset maximum frequency recovery deviation.

[0081] DC frequency limit control value statistics module 303 is used to count the DC frequency limit control value corresponding to the preset maximum frequency recovery deviation;

[0082] The minimum scale condition judgment module 304 is used to determine whether the regional power grid meets the minimum scale condition. If it does not meet the condition, it calculates the minimum load of the regional power grid based on the key parameter information, the primary frequency regulation capability of the generating unit, the primary frequency regulation capability of the load, and the DC frequency limit control value, and uses the minimum load as the minimum reasonable scale of the regional power grid.

[0083] In one optional embodiment, the key parameter information includes the installed capacity of the generating units, the load, the maximum single component failure system power loss, the primary frequency regulation coefficient of the generating units, the primary frequency regulation coefficient of the load, and the base frequency of the regional power grid.

[0084] In one optional embodiment, the primary frequency modulation capability calculation module 302 includes:

[0085] The unit primary frequency regulation capability calculation submodule is used to calculate the unit's primary frequency regulation capability based on the unit's installed capacity and the unit's primary frequency regulation coefficient.

[0086] The load primary frequency regulation capability calculation submodule is used to calculate the load primary frequency regulation capability based on the load primary frequency regulation coefficient, the base frequency, the load amount, and the preset maximum frequency recovery deviation.

[0087] In one optional embodiment, the formula for calculating the primary frequency regulation capability of the unit is as follows:

[0088] Mg = Kg * Sg

[0089] The formula for calculating the primary frequency regulation capability of the load is as follows:

[0090]

[0091] Where Mg represents the unit's primary frequency regulation capability, Kg represents the unit's primary frequency regulation coefficient, Sg represents the unit's installed capacity, Ml represents the load's primary frequency regulation capability, Kl represents the load's primary frequency regulation coefficient, fbase represents the base frequency, Pload represents the load, and Δf represents the preset maximum frequency recovery deviation.

[0092] In one optional embodiment, the minimum size condition judgment module 304 is specifically used for:

[0093] By determining whether the sum of the DC frequency limit control value, the unit's primary frequency regulation capability, and the load's primary frequency regulation capability is greater than the maximum single component failure system power loss, it can be determined whether the regional power grid meets the minimum reasonable scale requirement of a synchronous power grid.

[0094] In an optional embodiment, the minimum size condition judgment module 304 is further specifically used for:

[0095] Based on the maximum single-component failure system power loss, the unit's primary frequency regulation capability, the load's primary frequency regulation capability, and the DC frequency limit control value, the minimum load of the regional power grid is calculated using the following formula:

[0096]

[0097] Wherein, Ploadmin represents the minimum load of the regional power grid, Pload represents the load, Ploss represents the maximum power loss of the system due to a single component failure, Mg represents the primary frequency regulation capability of the unit, Ml represents the primary frequency regulation capability of the load, and Mflc represents the DC frequency limit control value.

[0098] In an optional embodiment, the minimum size condition judgment module 304 is further specifically used for:

[0099] If the sum of the DC frequency limit control value, the unit's primary frequency regulation capability, and the load's primary frequency regulation capability is greater than the maximum single component failure system power loss, then the regional power grid is determined to meet the minimum reasonable scale requirement of a synchronous power grid, and the process ends.

[0100] As the device embodiment is basically similar to the method embodiment, it is described in a relatively simple way. For relevant details, please refer to the description of the method embodiment above.

[0101] This invention also provides an electronic device, which includes a processor and a memory:

[0102] The memory is used to store program code and transfer the program code to the processor;

[0103] The processor is used to execute the synchronous power grid minimum size assessment method of any embodiment of the present invention according to the instructions in the program code.

[0104] This invention also provides a computer-readable storage medium for storing program code for executing the synchronous power grid minimum scale assessment method of any embodiment of this invention.

[0105] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0106] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of 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 an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0107] 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.

[0108] 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.

[0109] If the integrated 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, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0110] 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.

Claims

1. A method of synchronized grid minimization assessment, characterized in that, include: Obtain key parameter information of the regional power grid; the key parameter information includes the installed capacity of the generating units, load, maximum single component failure system power loss, primary frequency regulation coefficient of the generating units, primary frequency regulation coefficient of the load, and the base frequency of the regional power grid. Based on the key parameter information and the preset maximum frequency recovery deviation, the computer group's primary frequency regulation capability and the load's primary frequency regulation capability are determined. Calculate the DC frequency limit control value corresponding to the preset maximum frequency recovery deviation; Determine whether the regional power grid meets the minimum scale condition. If not, calculate the minimum load of the regional power grid based on the key parameter information, the primary frequency regulation capability of the generating unit, the primary frequency regulation capability of the load, and the DC frequency limit control value, and take the minimum load as the minimum reasonable scale of the regional power grid. The process of determining the primary frequency regulation capability of the computer group and the primary frequency regulation capability of the load based on the key parameter information and the preset maximum frequency recovery deviation includes: The primary frequency regulation capability of the computer group is determined based on the unit's assembly capacity and the unit's primary frequency regulation coefficient. The primary frequency regulation capability of the load is calculated based on the primary frequency regulation coefficient of the load, the base frequency, the load amount, and the preset maximum frequency recovery deviation. The formula for calculating the primary frequency regulation capability of the unit is as follows: The formula for calculating the primary frequency regulation capability of the load is as follows: wherein, represents the primary frequency modulation capability of the unit, represents the primary frequency modulation coefficient of the unit, represents the installed capacity of the unit, represents the primary frequency modulation capability of the load, represents the primary frequency modulation coefficient of the load, represents the base frequency, represents the load amount, represents the preset maximum frequency recovery deviation.

2. The method of claim 1, wherein, The determination of whether the regional power grid meets the minimum size condition includes: By determining whether the sum of the DC frequency limit control value, the unit's primary frequency regulation capability, and the load's primary frequency regulation capability is greater than the maximum single component failure system power loss, it can be determined whether the regional power grid meets the minimum reasonable scale requirement of a synchronous power grid.

3. The method for assessing the minimum size of a synchronous power grid according to claim 1, characterized in that, The step of calculating the minimum load of the regional power grid based on the key parameter information, the primary frequency regulation capability of the generating unit, the primary frequency regulation capability of the load, and the DC frequency limit control value includes: Based on the maximum single-component failure system power loss, the unit's primary frequency regulation capability, the load's primary frequency regulation capability, and the DC frequency limit control value, the minimum load of the regional power grid is calculated using the following formula: in, This indicates the minimum load capacity of the regional power grid. Indicates the load amount. This represents the maximum power loss of the system due to a single component failure. This indicates the unit's primary frequency regulation capability. Indicates the primary frequency regulation capability of the load. This indicates the DC frequency limit control value.

4. The method for assessing the minimum size of a synchronous power grid according to claim 2, characterized in that, Also includes: If the sum of the DC frequency limit control value, the unit's primary frequency regulation capability, and the load's primary frequency regulation capability is greater than the maximum single component failure system power loss, then the regional power grid is determined to meet the minimum reasonable scale requirement of a synchronous power grid, and the process ends.

5. A minimum scale assessment device for a synchronous power grid, characterized in that, include: The key parameter information acquisition module is used to acquire key parameter information of the regional power grid; the key parameter information includes the installed capacity of the generating units, load, maximum single component failure system power loss, primary frequency regulation coefficient of the generating units, primary frequency regulation coefficient of the load, and the base frequency of the regional power grid. The primary frequency regulation capability calculation module is used to calculate the primary frequency regulation capability of the computer group and the primary frequency regulation capability of the load based on the key parameter information and the preset maximum frequency recovery deviation. The DC frequency limit control value statistics module is used to count the DC frequency limit control value corresponding to the preset maximum frequency recovery deviation; The minimum scale condition judgment module is used to determine whether the regional power grid meets the minimum scale condition. If it does not meet the condition, the minimum load of the regional power grid is calculated based on the key parameter information, the primary frequency regulation capability of the generating unit, the primary frequency regulation capability of the load, and the DC frequency limit control value. The minimum load is then used as the minimum reasonable scale of the regional power grid. The primary frequency modulation capability calculation module includes: The unit primary frequency regulation capability calculation submodule is used to calculate the unit's primary frequency regulation capability based on the unit's installed capacity and the unit's primary frequency regulation coefficient. The load primary frequency regulation capability calculation submodule is used to calculate the load primary frequency regulation capability based on the load primary frequency regulation coefficient, the base frequency, the load amount, and the preset maximum frequency recovery deviation. The formula for calculating the primary frequency regulation capability of the unit is as follows: The formula for calculating the primary frequency regulation capability of the load is as follows: in, This indicates the unit's primary frequency regulation capability. This represents the primary frequency regulation coefficient of the generator unit. Indicates the unit's assembly capacity. Indicates the primary frequency regulation capability of the load. This represents the primary frequency regulation coefficient of the load. Indicates the fundamental frequency. Indicates the load amount. This indicates the preset maximum frequency recovery deviation.

6. An electronic device, characterized in that, The device includes a processor and a memory: The memory is used to store program code and transmit the program code to the processor; The processor is used to execute the synchronous power grid minimum size assessment method according to any one of claims 1-4 according to the instructions in the program code.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium is used to store program code for executing the synchronous power grid minimum size assessment method according to any one of claims 1-4.

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