Interconnection line support limited new energy power system partition inertia compensation configuration method, medium, electronic equipment and system

Abstract

The present application relates to a kind of new energy power system under the configuration method of partition inertia compensation of tie line support restriction, medium, electronic equipment and system, wherein the method obtains the operation data of the power system to be evaluated, determines a plurality of frequency response partitions and aggregates equivalent operating parameters;Establish a multi-partition extended frequency response model, set the equivalent tie line support strength between partitions;For expected disturbance, calculate the amount of tie line power change, calculate the support reduction coefficient when exceeding the remaining transmission margin, and iteratively correct the tie line support strength;Based on the converged model, solve the minimum inertia demand, inertia deficiency and compensation capacity of the partition.This application can estimate the inertia support capacity between partitions, and avoid overestimating the external frequency support capacity in the limited scenario of tie line, improve the accuracy of partition inertia safety boundary evaluation and compensation configuration.

Description

Technical Field

[0001] This invention belongs to the field of power system inertia compensation technology, specifically relating to a method, medium, electronic equipment and system for partitioned inertia compensation configuration of a new energy power system under limited tie-line support. Background Technology

[0002] In high-proportion renewable energy power systems, inertia and frequency support capabilities are not only reflected in changes in the total system volume but also exhibit significant spatial distribution differences. Areas with concentrated renewable energy integration typically have lower synchronous inertia, while areas with concentrated traditional synchronous machines possess stronger inertia and primary frequency regulation capabilities. When active power disturbances occur in areas with concentrated renewable energy integration, receiving-end load centers, or weakly interconnected areas, the frequency security of the affected area depends not only on local inertia, local damping, and local frequency regulation capabilities but also on whether adjacent areas can provide sufficient power support in a timely manner through tie lines. Therefore, the location of the disturbance, the regional inertia distribution, the inter-regional electrical coupling relationship, and the remaining transmission margin of the tie lines all collectively affect local frequency dynamics.

[0003] Existing methods for assessing minimum inertia requirements are mostly based on the equivalent frequency response model of the entire system. This model treats the power system as a single frequency response object and calculates the minimum inertia requirement at the system level based on constraints such as the maximum rate of frequency change and the minimum frequency point. While these methods can reflect the impact of the average inertia level of the entire system on overall frequency security, they struggle to differentiate the inertia support capacity of different regions and the impact of disturbance locations on local frequency responses. In real-world scenarios involving renewable energy integration and uneven inertia distribution, relying solely on the average frequency or total system inertia for assessment can easily mask the frequency security risks in areas with insufficient local inertia.

[0004] Some methods attempt to assess regional frequency security using zoned frequency response models, but these typically treat inter-zone tie lines as fixed-coupled channels, assuming that adjacent zones can continuously provide external frequency support to the affected zone with fixed coupling capabilities. In actual operation, inter-zone tie lines already carry a certain power flow before the disturbance, leaving limited remaining transmission margin. When the power change in tie lines caused by the disturbance approaches or exceeds the remaining transmission margin, the support capability of adjacent zones for the affected zone is limited. If the frequency response is still calculated based on unrestricted fixed coupling capabilities, the power support of external zones for the affected zone may be overestimated, thus underestimating the minimum local inertia required by the affected zone. Conversely, if each zone is evaluated completely in isolation, the effective support that tie lines can provide within the unrestricted range will be ignored, leading to overly conservative inertia configuration.

[0005] Therefore, there is a need for an inertia compensation configuration method that can take into account the actual situation of inter-regional tie line support in the frequency response model and accurately calculate the inertia compensation requirements. Summary of the Invention

[0006] One of the objectives of this invention is to at least solve one or more of the aforementioned problems existing in the prior art. In other words, one of the objectives of this invention is to provide a partitioned inertia compensation configuration method, medium, electronic equipment, and system for a new energy power system under limited tie-line support that meets one or more of the aforementioned requirements.

[0007] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a method for configuring partitioned inertia compensation in a new energy power system under limited tie-line support, comprising the following steps: Obtain the operating data of the power system to be evaluated, determine multiple frequency response zones based on the operating data, and aggregate the equivalent operating parameters of each frequency response zone; An extended frequency response model including each frequency response partition is established based on equivalent operating parameters, and the equivalent connection support strength of the frequency response partition connection line is set as the partition coupling parameter in the extended frequency response model. For the anticipated disturbance, the power change of the tie line in the frequency response interval is calculated based on the extended frequency response model. It is then determined whether the power change of the tie line exceeds the corresponding remaining transmission margin. For the tie line whose power change exceeds the corresponding remaining transmission margin, the support reduction factor is calculated based on the power change and the remaining transmission margin. The support reduction factor is used to correct the corresponding equivalent tie support strength. The power change is then recalculated based on the extended frequency response model using the corrected equivalent tie support strength. This process is iterated until the power change of all tie lines does not exceed the corresponding remaining transmission margin. The minimum inertia requirement for each frequency response partition is solved based on the extended frequency response model after iterative convergence. The inertia deficit of the target frequency response partition is calculated based on the minimum inertia requirement, and then the corresponding compensation configuration capacity is determined.

[0008] As a preferred implementation, multiple frequency response partitions are determined based on operational data, including: Based on the grid topology and power flow operating point in the operating data, calculate the synchronous power coupling coefficient of the branch in the power system to be evaluated; Calculate the node inertia density based on the node's inertia support capacity; The node connection weights are obtained by correcting the synchronous power coupling coefficient using the node inertia density. A weighted adjacency matrix is ​​constructed based on node connection weights, and the nodes of the power system to be evaluated are clustered according to the weighted adjacency matrix to obtain multiple frequency response partitions.

[0009] As a preferred implementation, an extended frequency response model including each frequency response partition is established based on equivalent operating parameters, including: Based on the equivalent operating parameters of each frequency response zone, regional frequency response equations are established to characterize the corresponding frequency response zone under the action of disturbance power and tie-line power. Based on the equivalent tie support strength of the tie lines in the frequency response intervals, a tie line power equation is established to characterize the change in tie line power between adjacent frequency response intervals. The regional frequency response equations of each frequency response zone are coupled through tie-line power equations to obtain an extended frequency response model.

[0010] As a preferred embodiment, setting the equivalent tie support strength of the frequency response interval tie lines for the extended frequency response model includes: Determine the set of tie lines connecting any two adjacent frequency response zones; Calculate the line support strength corresponding to each tie line based on the electrical parameters and power flow operation status of each tie line in the tie line set; The line support strengths corresponding to each tie line in the tie line set are aggregated to obtain the equivalent tie support strengths between the two corresponding frequency response zones.

[0011] As a preferred implementation, for a pre-defined anticipated disturbance, the power change of the frequency response interval tie line is calculated based on the extended frequency response model, including: Determine the location and power of the anticipated disturbance; Determine the target frequency response zone to which the expected disturbance belongs based on the disturbance location, and map the disturbance power to the zone disturbance power of the target frequency response zone; Input the partitioned disturbance power into the extended frequency response model to calculate the frequency deviation of each frequency response partition. The power variation of the interconnect line between frequency response zones is calculated based on the frequency deviation between adjacent frequency response zones.

[0012] As a preferred implementation, the support reduction factor is calculated using the following method: Within the preset frequency security assessment time window, obtain the maximum absolute value of the power change of the tie line; When the power change exceeds the corresponding remaining transmission margin, the ratio between the remaining transmission margin and the maximum absolute value of the power change is determined as the support reduction factor.

[0013] As a preferred implementation, the minimum inertia requirement corresponding to each frequency response partition is solved based on the iteratively converged extended frequency response model, and the inertia deficit of the target frequency response partition is calculated based on the minimum inertia requirement, thereby determining the corresponding compensation configuration capacity, including: Based on the extended frequency response model after iterative convergence, the frequency security index of each frequency response partition under the candidate inertia is calculated. Determine whether the frequency security indicators meet the preset frequency security constraints; The minimum candidate inertia that satisfies the preset frequency safety constraints is determined as the minimum inertia requirement for the corresponding frequency response partition. Calculate the inertia deficit of the target frequency response partition based on the minimum inertia requirement and the current equivalent inertia. The compensation configuration capacity of the target frequency response zone is determined based on the inertia deficit and the equivalent inertia per unit capacity of the newly added frequency support resources.

[0014] On the other hand, the present invention also provides an electronic device, including: a processor, a storage medium and a bus, wherein the storage medium stores program instructions executable by the processor, and when the electronic device is running, the processor executes the program instructions to implement the partitioned inertia compensation configuration method steps of the new energy power system under limited tie-line support as described above.

[0015] On the other hand, the present invention also provides a computer-readable storage medium storing a computer program, which is executed by a processor to implement the partitioned inertia compensation configuration method steps of a new energy power system under tie-line support constraints as described above.

[0016] On the other hand, the present invention also provides a zoned inertia compensation configuration system for a new energy power system under tie-line support constraints, comprising: The data processing module is used to acquire the operating data of the power system to be evaluated, determine multiple frequency response zones based on the operating data, and aggregate the equivalent operating parameters of each frequency response zone. The model building module is used to build an extended frequency response model including each frequency response partition based on equivalent operating parameters, and to set the equivalent connection support strength of the frequency response partition tie lines as the partition coupling parameters in the extended frequency response model. The support strength iteration module is used to calculate the power change of the tie lines in the frequency response interval based on the extended frequency response model in response to the preset expected disturbance, and to determine whether the power change of the tie lines exceeds the corresponding remaining transmission margin. For the tie lines whose power change exceeds the corresponding remaining transmission margin, the support reduction factor is calculated based on the power change and the remaining transmission margin. The support reduction factor is used to correct the corresponding equivalent tie support strength, and the power change is recalculated based on the extended frequency response model using the corrected equivalent tie support strength. The iteration continues until the power change of all tie lines does not exceed the corresponding remaining transmission margin. The compensation configuration module is used to solve the minimum inertia requirement corresponding to each frequency response partition based on the extended frequency response model after iterative convergence, and to calculate the inertia deficit of the target frequency response partition based on the minimum inertia requirement, thereby determining the corresponding compensation configuration capacity.

[0017] Compared with the prior art, the partitioned inertia compensation configuration method, medium, electronic equipment and system of the new energy power system under the constraint of tie line support provided by the present invention have the following beneficial effects: This invention determines multiple frequency response zones based on the operating data of the power system to be evaluated, and aggregates the equivalent operating parameters of each frequency response zone, so that the inertia demand assessment can be refined from the average frequency level of the whole system to the frequency response level of each zone.

[0018] Furthermore, an extended frequency response model including each frequency response partition is established based on the partition's equivalent operating parameters, and the tie-line operating margin is fed back into the inter-partition coupling parameters, so that the frequency support contribution of the external region to the disturbed region is corrected by feedback from the actual transmission capacity. Thus, in weak or heavy-load tie-line scenarios, it is possible to avoid overestimating the external frequency support capacity due to fixed coupling assumptions, and thereby avoid underestimating the local inertia requirements of the disturbed partition. Attached Figure Description

[0019] Figure 1 This is a flowchart of a partitioned inertia compensation configuration method for a new energy power system under limited tie-line support, according to an embodiment of the present invention. Figure 2 This is a system architecture topology diagram of a verification embodiment of the present invention. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0021] The following description provides examples and does not limit the scope, applicability, or examples set forth in the claims. Changes may be made to the function and arrangement of the described elements without departing from the scope of this application. Various processes or components may be appropriately omitted, substituted, or added to the examples. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Furthermore, features described with respect to some examples may be combined into other examples.

[0022] This application provides a method for configuring zoned inertia compensation in a new energy power system under tie-line support constraints, the flowchart of which is shown below. Figure 1 As shown, it includes steps S100-S400.

[0023] S100: Obtain the operating data of the power system to be evaluated, determine multiple frequency response zones based on the operating data, and aggregate the equivalent operating parameters of each frequency response zone.

[0024] In S100, the operating data of the power system to be evaluated under a given operating mode is first obtained.

[0025] In some specific implementations, the operating data includes: bus, line, and transformer topology; power flow and transmission limits before disturbance for each line; synchronous generator capacity, inertia constant, damping coefficient, and governor parameters; new energy power plant capacity, output, reserve power, virtual inertia parameters, and droop control parameters; energy storage or grid-connected converter capacity, equivalent inertia parameters, and frequency support parameters; load distribution and load frequency damping; and maximum permissible rate of frequency change. R max Maximum permissible frequency offset Δ f max ; expected perturbation set C .

[0026] The above operational data serves as input for subsequent partitioning, model building, disturbance response calculation, and compensation capacity calculation.

[0027] Suppose the power system to be evaluated consists of a set of nodes and a set of branches. The system topology can be represented as follows: .

[0028] in, G This represents the topology of the power system to be evaluated. N For a set of nodes, L This is a set of branches. A set of nodes can correspond to electrical nodes such as busbars, generators, or new energy access nodes, while a set of branches can correspond to electrical connection objects such as AC lines, transformer branches, or inter-regional tie lines.

[0029] Based on operational data, the power system to be evaluated is divided into m frequency response zones, and the set of zones is represented as follows: .

[0030] in, Ω z Indicates the first z One frequency response partition; m This refers to the number of partitions. Specifically, m It can be determined based on operational analysis requirements, system topology scale, or preset partitioning strategies.

[0031] Frequency response partitioning is used to dynamically decompose the frequency of the entire system into multiple regional frequency response objects, so that the disturbance location, regional inertia level and cross-regional communication support capability can be expressed separately in subsequent models.

[0032] In some specific implementations, multiple frequency response partitions are determined based on operational data, including the following steps: Based on the grid topology and power flow operating point in the operating data, calculate the synchronous power coupling coefficient of the branch in the power system to be evaluated; Calculate the node inertia density based on the node's inertia support capacity; The node connection weights are obtained by correcting the synchronous power coupling coefficient using the node inertia density.

[0033] In some more specific implementations, when determining multiple frequency response zones based on operational data, the synchronous power coupling coefficient of the branch is first calculated based on the grid topology and power flow operating point.

[0034] For branch roads Calculate the synchronous power coupling coefficient to transform the electrical coupling strength at the power flow operating point into a branch weight basis that can be used for partitioning, expressed as: .

[0035] in, , These are the node voltage amplitudes, , These are the phase angles of the nodes, , These are the conductance and susceptance of the nodal admittance matrix elements, respectively. The voltage, phase angle, and admittance parameters mentioned above are derived from power flow calculations and network parameters for the operating mode to be evaluated.

[0036] In order to make the frequency response partitioning reflect both electrical coupling and inertia spatial distribution, the effective inertia energy of the nodes is further calculated based on the node inertia support capacity.

[0037] In some specific implementations, nodes i The effective inertial energy is expressed as: .

[0038] in, This represents the effective inertia energy of node i; , , These are the sets of synchronous machines accessed by node i, the set of network-following new energy sources, and the set of network-building new energy sources; , These are the synchronous machine capacity and inertia constant, respectively. , These are the grid-connected new energy capacity and virtual inertia parameters, respectively. , These are the grid-type renewable energy capacity and equivalent inertia parameters, respectively. , These are the availability coefficients of the resources supporting the corresponding frequencies.

[0039] Effective inertia energy is used to unify the natural inertia of synchronous machines, the virtual inertia of grid-type new energy sources, and the equivalent inertia of grid-type new energy sources into effective inertia support capacity at the node level.

[0040] Based on the above effective inertial energy, the node i The inertia density is expressed as: .

[0041] in, For nodes i The local capacity benchmark.

[0042] Inertia density is used to eliminate the influence of different node capacity sizes on the absolute value of inertia energy, so that the node inertia support capacity can participate in partitioned calculations at the same scale.

[0043] After obtaining the synchronous power coupling coefficient and node inertia density, the synchronous power coupling coefficient is corrected using the node inertia density to obtain the node connection weight.

[0044] Specifically, when two nodes have strong electrical coupling and similar inertia densities, their connection weight is large; when the difference in inertia density is significant, the connection weight is suppressed, which is beneficial for identifying frequency response regions with different inertia support characteristics.

[0045] In some specific implementations, node connection weights are represented as: .

[0046] in, Represents a node i With nodes j The connection weights, and They are nodes i , j The normalized nodal inertia density.

[0047] The term reflects the electrical coupling strength of the branch, while the exponential term reflects the corrective effect of the difference in inertia density between adjacent nodes on the partition connection weight.

[0048] Construct a weighted adjacency matrix based on node connection weights. And construct the normalized Laplace matrix from the weighted adjacency matrix.

[0049] The normalized Laplace matrix is ​​expressed as: .

[0050] in, Let I be the normalized Laplacian matrix, D be the node degree matrix, and A be the weighted adjacency matrix.

[0051] Based on the above standardized Laplace matrix, we can take... The former m Spectral embedding is performed on each feature vector, and deterministic embedding is adopted. k - means Clustering yields multiple frequency response partitions.

[0052] The resulting partitioning utilizes both topological and power flow information, as well as differences in inertia support capabilities, enabling subsequent regional frequency response models to reflect the impact of disturbance location and inertia distribution on frequency security.

[0053] After determining the frequency response partitions, the equivalent operating parameters of each partition are aggregated.

[0054] Equivalent operating parameters can be aggregated using the following method: First, calculate the... z The capacity benchmark for each partition is used to determine the capacity normalization benchmark at the partition level, and serves as the basis for calculating the equivalent inertia constant, inertia coefficient, and compensation capacity. z The capacity baseline of each partition is specifically represented as follows: .

[0055] in, Indicates the first z Capacity baseline for each partition For nodes i The local capacity benchmark.

[0056] Calculate the first z The effective inertia energy of each partition, which aggregates the effective inertia support capacity of nodes into the effective inertia energy of the partition, is specifically represented as follows: .

[0057] in, Indicates partition The sum of the effective inertial energy of all nodes within the system.

[0058] Calculate the first z The current equivalent inertia constant of each partition, representing the inertia level of existing frequency support resources converted to the partition capacity baseline under the current operating state, is specifically expressed as follows: .

[0059] in, It represents the equivalent inertia constant of the z-th partition under the current operating mode.

[0060] Calculate the equivalent inertia coefficient of the z-th partition to convert the candidate inertia or the current equivalent inertia into an inertial term in the regional frequency response equation, specifically expressed as: .

[0061] in, This represents the equivalent inertia coefficient of the z-th partition. This represents the partition inertia to be solved or tested during the evaluation process. This represents the capacity baseline of the z-th partition. This indicates the system's rated frequency.

[0062] In this calculation process, the current equivalent inertia Primarily used to represent the current inertia level, candidate inertia It is mainly used for minimum inertia requirement search.

[0063] Calculate the primary frequency modulation gain of the synchronizer in the z-th partition, and convert the primary frequency modulation capability of the synchronizer in the partition into the frequency modulation power coefficient in the regional frequency response model, specifically expressed as: .

[0064] in, This represents the aggregated value of the primary frequency modulation gain of the synchronous machine within the z-th partition. This represents the governor droop coefficient of the synchronous machine g. This represents the capacity reference of the synchronous machine g within region z.

[0065] Calculate the first z The fast frequency support gain for new energy and energy storage in each partition is used to characterize the fast power support that power electronic interface resources such as new energy and energy storage can provide under the influence of frequency deviation, specifically expressed as follows: .

[0066] in, Indicates the first z The fast frequency support gain of each partition This indicates the droop control parameters for grid-connected new energy sources. This indicates the capacity benchmark for grid-connected new energy vehicles. This refers to the droop control parameters for grid-type new energy or energy storage resources. This indicates the capacity benchmark for grid-connected new energy vehicle type b. , These represent the availability coefficients of the corresponding resources.

[0067] Calculate the first z The equivalent damping of each zone, to aggregate the load and generator-side damping effects into a damping term in the regional frequency response equation, is expressed as: .

[0068] in, Indicates the first z Equivalent damping of each zone Indicates load frequency damping. This indicates the damping of the synchronizing machine.

[0069] After aggregating the equivalent operating parameters of each frequency response partition using the above method, they will be used as input to the extended frequency response model established in the subsequent step S200.

[0070] S200 establishes an extended frequency response model including each frequency response partition based on equivalent operating parameters, and sets the equivalent connection support strength of the frequency response partition connection line as the partition coupling parameter in the extended frequency response model.

[0071] In step S200, using the frequency response partitions output from S100 and the equivalent operating parameters of each partition as input, the regional frequency response equations for each partition are established and coupled through the tie-line power equations between adjacent partitions. The state variables of this extended frequency response model include the partition frequency deviation, the change in primary frequency modulation power of the synchronizer, and the change in tie-line power between partitions. The model output is used for subsequent disturbance response, tie-line margin judgment, and inertia safety boundary solution.

[0072] In some specific embodiments, an extended frequency response model including each frequency response partition is established based on equivalent operating parameters, including the following steps: Based on the equivalent operating parameters of each frequency response zone, regional frequency response equations are established to characterize the corresponding frequency response zone under the action of disturbance power and tie-line power. Based on the equivalent tie support strength of the tie lines in the frequency response intervals, a tie line power equation is established to characterize the change in tie line power between adjacent frequency response intervals. The regional frequency response equations of each frequency response zone are coupled through tie-line power equations to obtain an extended frequency response model.

[0073] The regional frequency response equation describes the combined effect of disturbance power, local frequency modulation, local damping, fast frequency support, and cross-regional tie-line power variation on the frequency deviation of the zones. Tie-line power characterizes the process by which the frequency deviation difference between adjacent zones drives the change in tie-line power. By coupling the regional frequency response equation with the tie-line power equation, an extended frequency response model including each frequency response zone can be obtained. This model can output the frequency deviation of different zones and the change in cross-regional tie-line power, allowing the remaining transmission margin of the tie-line to be included in subsequent iterative calculations.

[0074] In some more specific embodiments, step S200 includes: For the z Establish the regional frequency response equation for each partition: .

[0075] in, Indicates the first z Frequency deviation of each partition Indicates the first z Changes in the primary frequency modulation power of each zone synchronizer For partitioned equivalent damping, To provide high-frequency support gain for new energy and energy storage, Indicates disturbance c Mapped to the z The disturbance power of each partition Indicates the first z The first partition and the first q Power variation of tie lines between zones.

[0076] The primary frequency modulation of the synchronous machine is represented by a first-order aggregation element. The specific gain of the primary frequency modulation of the synchronous machine is as follows: .

[0077] in, Indicates the first z The equivalent time constant of the synchronous speed control system of each partition.

[0078] The dynamic representation of tie-line power between adjacent frequency response zones is as follows: .

[0079] in, Indicates the first q Frequency deviation of each partition For the first r Partitioning during the next iteration z The equivalent interconnection support strength between the system and partition q. The greater the equivalent interconnection support strength, the stronger the cross-regional power support capability under the same partition frequency deviation difference.

[0080] In one specific implementation, when setting the equivalent tie support strength of the interval tie lines for the extended frequency response model, the set of tie lines connecting any two adjacent frequency response intervals is first determined. Then, the line support strength corresponding to each tie line is calculated based on the electrical parameters and power flow operation status of the tie line.

[0081] Aggregate the line support strengths in the tie line set to obtain the initial equivalent tie support strengths between adjacent partitions z and q: .

[0082] in, Indicates partition z With partitions q Initial equivalent connection support strength between them Indicates a connected partition z and partitions q A collection of cross-regional routes, Indicates cross-regional lines Synchronous power coupling coefficient.

[0083] Through the above aggregation process, the synchronous power coupling capability of the cross-regional line set is aggregated into the inter-regional coupling parameters in the extended frequency response model.

[0084] Furthermore, by coupling the regional frequency response equation with the tie-line power between adjacent frequency response zones, an extended frequency response model including each frequency response zone can be obtained.

[0085] S300: For a pre-defined anticipated disturbance, calculate the power change of the tie lines in the frequency response interval based on the extended frequency response model; determine whether the power change of the tie lines exceeds the corresponding remaining transmission margin; for tie lines whose power change exceeds the corresponding remaining transmission margin, calculate the support reduction factor based on the power change and the remaining transmission margin, correct the corresponding equivalent tie support strength using the support reduction factor, and recalculate the power change based on the extended frequency response model using the corrected equivalent tie support strength, iterating until the power change of all tie lines does not exceed the corresponding remaining transmission margin.

[0086] In some specific implementations, in step S300, firstly, for any disturbance in the set of anticipated disturbances... c The location and power of the disturbance are determined, and the disturbance at the node level is mapped to the partition disturbance power.

[0087] Disturbance c The node perturbation vector is represented as: .

[0088] in, This represents the perturbation power vector of perturbation c at the node level. This indicates the number of nodes in the power system to be evaluated. Indicates disturbance c At the node i The disturbance power on.

[0089] For occurrences at nodes i disturbance c Disturbance power Represented as: .

[0090] The disturbance power of other nodes that did not experience the disturbance is set to 0.

[0091] To extend the frequency response model with node perturbation input, a mapping matrix from nodes to partitions is defined. Specifically, it uses: .

[0092] in, This represents the mapping matrix from nodes to frequency response partitions. This represents a matrix element. The values ​​of matrix elements are determined by the following formula: .

[0093] That is, when the node i Belongs to partition hour, When node i Not a partition hour, .

[0094] Partition perturbation vectors can be established. to indicate disturbance c The perturbation power vector in each frequency response partition.

[0095] Add the node perturbation power belonging to the same frequency response partition, for the th z Each partition has a disturbance power expressed as... .

[0096] in, Indicates disturbance c Mapped to the z The partition disturbance power after each partition.

[0097] Through the above steps, the location of the disturbance is not evenly distributed across the entire system capacity, but rather retains the spatial properties of the location where the disturbance occurs, and is thus incorporated into the regional frequency response equation as a local disturbance in the corresponding partition.

[0098] In some specific implementations, after obtaining the partitioned disturbance power, Input the extended frequency response model and calculate the frequency deviation of each frequency response partition. And calculate the power variation of the tie lines between adjacent partitions. The change in tie-line power is used to determine whether the power support from the external region to the disturbed region is constrained by the cross-regional transmission margin.

[0099] Specifically, for the set of cross-regional tie lines between partition z and partition q, the power before the disturbance is expressed as: .

[0100] Pre-disturbance power is used to determine the transmission capacity already occupied by the tie line before the disturbance, whereby... Indicates partition z With partitions q The cross-regional power before the disturbance Indicates cross-regional lines Power before the disturbance.

[0101] partition z With partitions q The inter-regional transmission limit is expressed as follows: .

[0102] As an example, this limit is determined by the cross-regional transmission limit given by the operating mode or scheduling to be evaluated.

[0103] Based on the pre-disturbance power and inter-regional transmission limits, the remaining support margin of the tie line is expressed as follows: ; Within the preset frequency security assessment time window, the change in tie-line power must meet the following requirements. .

[0104] in, This indicates the preset frequency security assessment time window. Indicates time t The change in power of the connecting line.

[0105] Specifically, in the r-th iteration of step S300, the current equivalent connection support strength is used. Calculate the disturbance c The partition frequency response and tie-line power response are calculated, and the maximum absolute value of the tie-line power change within the evaluation time window is obtained.

[0106] As an example, the maximum absolute value of the change in tie line power. This transforms the dynamic response curve into a scalar indicator that can be directly compared with the remaining support margin.

[0107] in, Indicates the first r Perturbation in the next iteration c Offline z - q The absolute value of the maximum power change.

[0108] In a further embodiment, the tie-line support utilization rate can be calculated to determine the extent to which the tie-line power variation is utilized relative to the remaining transmission margin: .

[0109] in, Indicates the first r Perturbation in the next iteration c Offline z - q Utilization rate of support.

[0110] like This indicates that the tie line has not exceeded the remaining transmission margin under the current disturbance and current iteration, and the equivalent tie support strength of the tie line used in the current iteration remains unchanged.

[0111] like This indicates that the power change of the tie line exceeds the corresponding remaining transmission margin, indicating that the external support capability of the tie line is limited, and triggering support reduction processing.

[0112] In some specific implementations, for constrained tie lines, the section support capacity is compressed according to the ratio between the available remaining margin and the actual required tie line power variation.

[0113] As a feasible example, the support reduction factor is calculated using the following method: Within the preset frequency security assessment time window, obtain the maximum absolute value of the power change of the tie line; When the power change exceeds the corresponding remaining transmission margin, the ratio between the remaining transmission margin and the maximum absolute value of the power change is determined as the support reduction factor.

[0114] Specifically, the support reduction coefficient for the support reduction process is calculated: .

[0115] Furthermore, the equivalent interconnection support strength is corrected using the support reduction factor: .

[0116] in, This indicates the updated equivalent communication support strength.

[0117] The above method feeds back the limitation of the remaining transmission margin of the tie line into the coupling parameters of the extended frequency response model.

[0118] Furthermore, when multiple tie lines simultaneously exceed the limit, the equivalent tie support strength of all tie lines exceeding the limit is updated synchronously; tie lines that do not exceed the limit maintain their current equivalent tie support strength. Through this reduction mechanism, the overestimated external support capabilities of each frequency response partition in the original extended frequency response model can be gradually compressed, thereby forcing the disturbed frequency response partitions to rely more on local inertia and local frequency support resources.

[0119] After correcting the equivalent tie support strength, the partition frequency deviation and tie line power change are recalculated based on the updated extended frequency response model, and the above judgment and correction steps are performed again until the iteration conditions are met.

[0120] As a feasible example, iteration can continue until the power variation of all tie lines does not exceed the corresponding remaining transmission margin.

[0121] As another feasible example, the iteration can also incorporate the change in equivalent connection support strength between two adjacent iterations as a convergence criterion.

[0122] For example, with As a stopping condition for iteration.

[0123] in, This represents the preset convergence threshold, used to determine whether the convergence of the equivalent connection support strength in the intervals tends to be stable.

[0124] S400 solves the minimum inertia requirement for each frequency response partition based on the extended frequency response model after iterative convergence, and calculates the inertia deficit of the target frequency response partition based on the minimum inertia requirement, thereby determining the corresponding compensation configuration capacity.

[0125] In some specific implementations, step S400 includes the following steps: Based on the extended frequency response model after iterative convergence, the frequency security index of each frequency response partition under the candidate inertia is calculated. Determine whether the frequency security indicators meet the preset frequency security constraints; The minimum candidate inertia that satisfies the preset frequency safety constraints is determined as the minimum inertia requirement for the corresponding frequency response partition. Calculate the inertia deficit of the target frequency response partition based on the minimum inertia requirement and the current equivalent inertia. The compensation configuration capacity of the target frequency response zone is determined based on the inertia deficit and the equivalent inertia per unit capacity of the newly added frequency support resources.

[0126] Specifically, in step S400, based on the extended frequency response model after the iteration convergence in S300, the candidate inertia is... The calculation of frequency security indicators for each partition includes the following methods: For disturbances c and partitions z Rotational Frequency Change Rate (RoCoF) .

[0127] in, Indicates candidate inertia Sub-partition z Disturbancec The rate of change of frequency at the initial moment, For the zoned disturbance power, This is the equivalent inertia coefficient.

[0128] Define the maximum frequency offset of each region as .

[0129] in, Indicates candidate inertia Sub-partition z Disturbance c The maximum frequency offset within the preset frequency safety assessment time window under the influence of the action. This indicates the partition frequency deviation at the corresponding time.

[0130] Maximum support utilization rate of the connecting line .

[0131] in, Indicates candidate inertia Sub-partition z The maximum utilization rate of the connecting lines between it and its adjacent partitions. Representation and partitioning z Adjacent partition sets, Indicates perturbation under candidate inertia c The resulting change in tie line power.

[0132] Based on the aforementioned frequency change rate, maximum frequency offset, and tie-line support utilization rate, a unified safety margin function is constructed to unify the RoCoF constraint, maximum frequency offset constraint, and tie-line support margin constraint into a single criterion.

[0133] . When the uniform safety margin function satisfies When, explain the partition z Disturbance c The following conditions must be met simultaneously: frequency change rate, maximum frequency offset, and tie line support margin constraints.

[0134] Furthermore, in order to solve for the minimum candidate inertia that satisfies the above unified safety margin function... First, calculate the lower bound of the inertia search under the frequency change rate constraint: .

[0135] in, This represents the lower bound for the candidate inertia search given by the RoCoF constraint. The system's rated frequency, For the zoned disturbance power, Based on the partition capacity, This represents the maximum permissible rate of frequency change.

[0136] Set search lower bound Set the upper limit of the search. .

[0137] like If the search upper bound is not found, update it to twice its original value, and repeat this process until... .

[0138] Then in the interval The search is performed in segments using fixed intervals, and the Brent method is used to solve the problem in subintervals where the sign changes. , receive disturbance c Sub-partition z minimum inertia .

[0139] In each candidate inertia When calculating the unified safety margin function, the tie-line support reduction iteration process in S300 is performed to ensure that the obtained minimum inertia includes the impact of tie-line support limitation on regional frequency security.

[0140] Consider the set of all anticipated disturbances C , No. z The final minimum inertia requirement for each partition is: .

[0141] The most severe disturbance corresponding to the z-th partition is: .

[0142] By using the above method, the disturbance scenario that results in the highest inertia safety boundary of the partition can be identified, which facilitates the subsequent allocation of compensation resources.

[0143] exist Calculate the three types of constraint margins separately: ; ; .

[0144] in, Indicates the constraint margin of the rate of change of frequency. This represents the constraint margin at the lowest frequency point. This indicates the support constraint margin of the connecting line.

[0145] The constraint with the largest value among the three types of constraint margins is determined as the dominant safety constraint for the corresponding partition and disturbance. , This indicates that the frequency change rate constraint is dominant. This indicates that the constraint at the lowest frequency point is dominant. This indicates that the connection line supports the constraint and dominates.

[0146] After determining the final minimum inertia requirement for a partition, the inertia deficit is calculated based on the minimum inertia requirement of the target frequency response partition and the current equivalent inertia.

[0147] As a feasible example, the inertia deficit of the z-th partition .

[0148] according to Determine if the current partition has insufficient inertia. This indicates that the partition has insufficient inertia and requires additional frequency support resources.

[0149] When there is an inertia deficit in a partition, the compensation configuration capacity is determined based on the inertia deficit and the equivalent inertia per unit capacity of the newly added frequency support resources.

[0150] As a feasible example, let the equivalent inertia per unit capacity of newly added grid-connected new energy sources, energy storage, or high-frequency support resources be . The frequency of new resource additions supports availability at [a certain level]. Compensation configuration capacity .

[0151] Final output This outputs the minimum inertia requirement, inertia deficit, compensation capacity, most severe disturbance, and dominant safety constraints for each partition.

[0152] To verify the effectiveness of the partitioned inertia compensation configuration method for new energy power systems under limited tie-line support proposed in this application, this application also provides a verification embodiment.

[0153] Specifically, adopt Figure 2 The IEEE 39-node system topology diagram shown is used for verification.

[0154] The system comprises 39 buses, 46 AC branches, and 10 generators. To construct a high-proportion renewable energy integration scenario, the synchronous generators at buses 33, 38, and 39 were replaced with wind farms of equal capacity, denoted as WT33, WT38, and WT39, respectively. The wind farms are equipped with virtual inertia control and droop control, while the remaining synchronous generators retain their original inertia and primary frequency regulation parameters.

[0155] The virtual inertia availability coefficient of the wind farm is taken as =0.8, the system frequency security constraint is set to =1.2Hz / s =0.5Hz, the system's rated frequency is =50Hz.

[0156] according to Figure 2 The system is divided into three frequency response partitions, and the effective inertia of each partition is shown in Table 1.

[0157]

[0158] Table 1 As can be seen from Table 1, The total capacity of the generating units is relatively small. When a large active power deficit occurs in this area, the disturbance power accounts for a high proportion of the area's capacity, which can easily lead to local frequency security risks.

[0159] according to Figure 2 And based on the partitioning results in Table 1, the system's inter-zone interconnects include , and The tidal current before disturbance is obtained from the tidal current results, and the remaining support margin of the connecting line is set, as shown in Table 2.

[0160]

[0161] Table 2 in, The remaining support margin is 160MW, which is lower than the remaining support margin of the other two sets of inter-regional interconnection lines. Therefore, it is selected to characterize weak or heavy-load interconnection operation scenarios.

[0162] Based on the above system, this verification embodiment sets up three active power deficit disturbance scenarios, as shown in Table 3.

[0163]

[0164] Table 3 The disturbance power of 365MW is approximately 0.05pu of the total installed capacity of the system, which is 7300MVA. The disturbance location and disturbance power are mapped to the corresponding frequency response zones, and the zone frequency response and tie-line support utilization rate under the current inertia level are calculated according to S200 and S300.

[0165] At the current inertia level, frequency security assessments were conducted for the three disturbance scenarios. The results of the frequency security assessments at the current inertia level are shown in Table 4.

[0166]

[0167] Table 4 Table 4 shows that in scenarios C1 and C2, the RoCoF of the disturbed partition did not exceed 1.2 Hz / s, but the maximum frequency offset exceeded 0.5 Hz, making the maximum frequency offset constraint the main limiting factor. In scenario C3, The maximum frequency offset was 0.517Hz, exceeding the 0.5Hz constraint, while the maximum tie line utilization reached 1.044, indicating that there was a tie line support limitation problem under this disturbance.

[0168] For the C3 weak tie scenario, the inertia requirement without tie line support reduction calculation is compared with the inertia requirement after adopting the tie line margin check and support reduction mechanism in step S300 of this application, and Table 5 is provided to show the impact of tie line support limitation on the partition inertia requirement.

[0169]

[0170] Table 5 As shown in Table 5, in scenario C3, if the limitation of the tie line support is not considered, The minimum inertia requirement is 8.226s; after adopting the tie-line support reduction mechanism in step S300 of this application, due to The support capacity of weak communication channels is limited by the remaining transmission margin. The minimum inertia requirement is increased to 8.546 s. This result shows that the method in this application, which incorporates the remaining transmission margin of the tie line into the solution of the partition inertia boundary, can effectively reflect the increase in the local inertia requirement of the disturbed partition in the weak tie scenario.

[0171] Furthermore, at the inertia boundary of the C3 scenario, the utilization rate of each connecting line support is checked, as shown in Figure 6.

[0172]

[0173] Table 6 As shown in Table 6, at the inertia boundary of scene C3, The maximum power variation of the tie line is 159.844MW, and the support utilization rate is 0.999, which is close to but does not exceed the remaining support margin of 160MW. and The tie line did not exceed the limit. Therefore, the inertia boundary simultaneously satisfies the maximum frequency offset constraint and the tie line support margin constraint.

[0174] Furthermore, targeting The compensation configuration capacity can be determined by substituting the inertia deficit obtained from the boundary value solution into the compensation configuration capacity calculation formula. Let the equivalent inertia per unit capacity of newly added grid-connected new energy sources be... Availability coefficient In this C3 weakly linked perturbation scenario, the inertia deficit obtained from the boundary solution is determined. Approximately 1696.303 MVA of additional fast frequency support resources are required to simultaneously meet the maximum frequency offset / frequency minimum point constraint and the tie-line support constraint.

[0175] This application also provides an electronic device, which may include, but is not limited to, a processor, a memory, and optional communication interfaces and input / output interfaces.

[0176] The processor can be a central processing unit (CPU), a digital signal processor (DSP), a programmable logic device (FPGA), an application-specific integrated circuit (ASIC), or other processing cores capable of executing instructions. In this embodiment, the processor is the control center of the electronic device, responsible for running the computer program stored in the memory.

[0177] Memory can be any type of volatile or non-volatile storage medium, such as random access memory (RAM), read-only memory (ROM), flash memory, hard disk drive (HDD), solid-state drive (SSD), etc. Memory is used to store operating systems, various data, and computer programs.

[0178] When the instructions of a computer program stored in memory are executed by a processor, the electronic device performs the partitioned inertia compensation configuration method for new energy power systems under tie-line support constraints as described in the above embodiments.

[0179] This application also provides a computer-readable storage medium. A computer program is stored on this computer-readable storage medium.

[0180] The computer program contains a series of instructions that, when loaded and executed by the processor of an electronic device, enable the electronic device to implement the partitioned inertia compensation configuration method for new energy power systems under limited tie-line support as described in the above embodiments.

[0181] This application also provides a partitioned inertia compensation configuration system for new energy power systems under limited tie-line support, including a data processing module, a model building module, a support strength iteration module, and a compensation configuration module.

[0182] The data processing module is used to acquire the operating data of the power system to be evaluated, determine multiple frequency response zones based on the operating data, and aggregate the equivalent operating parameters of each frequency response zone.

[0183] Specifically, the data processing module can generate frequency response partitions and equivalent operating parameters of the partitions based on the system topology, power flow operating points, node inertia support capabilities, and partition capacity benchmarks, and provide them to the model building module.

[0184] The model building module is used to build an extended frequency response model including each frequency response partition based on equivalent operating parameters, and to set the equivalent connection support strength of the frequency response partition tie lines as the partition coupling parameters in the extended frequency response model.

[0185] Specifically, the model building module can form a coupled model of zone frequency response and tie line power variation based on zone inertia coefficient, frequency modulation gain, fast frequency support gain, damping parameters, and cross-zone tie line set.

[0186] The support strength iteration module is used to calculate the power change of the tie lines in the frequency response interval based on the extended frequency response model in response to the preset expected disturbance, and to determine whether the power change of the tie lines exceeds the corresponding remaining transmission margin. For the tie lines whose power change exceeds the corresponding remaining transmission margin, the support reduction factor is calculated based on the power change and the remaining transmission margin. The support reduction factor is used to correct the corresponding equivalent tie support strength, and the power change is recalculated using the corrected equivalent tie support strength. The iteration continues until the power change of all tie lines does not exceed the corresponding remaining transmission margin.

[0187] The compensation configuration module is used to solve the minimum inertia requirement corresponding to each frequency response partition based on the extended frequency response model after iterative convergence, and to calculate the inertia deficit of the target frequency response partition based on the minimum inertia requirement, thereby determining the corresponding compensation configuration capacity.

[0188] Specifically, the compensation configuration module can output the minimum inertia requirement, inertia deficit, compensation configuration capacity, most severe disturbance and dominant safety constraint for each partition, so that the configuration results can correspond to the partition frequency safety boundary.

[0189] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed in this application 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 implementation should not be considered beyond the scope of this application.

[0190] The foregoing description is merely an exemplary embodiment of this application and should not be construed as limiting the scope of this application. Any equivalent changes and modifications made in accordance with the teachings of this application shall still fall within the scope of this application. Those skilled in the art will readily conceive of other embodiments of this application upon considering the disclosure of the specification and practice. The foregoing disclosure is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary technical means in the art not described in this application. The specification and embodiments are considered exemplary only, and the scope and spirit of this application are defined by the claims.

Claims

1. A method for configuring zoned inertia compensation in a new energy power system under limited tie-line support, characterized in that, Includes the following steps: Obtain the operating data of the power system to be evaluated, determine multiple frequency response zones based on the operating data, and aggregate the equivalent operating parameters of each frequency response zone; An extended frequency response model including each frequency response partition is established based on the equivalent operating parameters, and the equivalent connection support strength of the frequency response partition connection line is set as the partition coupling parameter in the extended frequency response model. For a pre-defined anticipated disturbance, the power change of the tie lines in the frequency response intervals is calculated based on the extended frequency response model; it is determined whether the power change of the tie lines exceeds the corresponding remaining transmission margin; for the tie lines whose power change exceeds the corresponding remaining transmission margin, a support reduction factor is calculated based on the power change and the remaining transmission margin, the corresponding equivalent tie support strength is corrected using the support reduction factor, and the power change is recalculated based on the extended frequency response model using the corrected equivalent tie support strength, iterating until the power change of all the tie lines does not exceed the corresponding remaining transmission margin. Based on the extended frequency response model after iterative convergence, the minimum inertia requirement corresponding to each frequency response partition is solved, and the inertia deficit of the target frequency response partition is calculated according to the minimum inertia requirement, thereby determining the corresponding compensation configuration capacity.

2. The method for configuring partitioned inertia compensation in a new energy power system under limited tie-line support as described in claim 1, characterized in that, Based on the aforementioned operational data, multiple frequency response partitions are determined, including: Based on the grid topology and power flow operating point in the operating data, calculate the synchronous power coupling coefficient of the branch in the power system to be evaluated; Calculate the node inertia density based on the node's inertia support capacity; The node connection weight is obtained by correcting the synchronization power coupling coefficient using the node inertia density. A weighted adjacency matrix is ​​constructed based on the node connection weights, and the nodes of the power system to be evaluated are clustered according to the weighted adjacency matrix to obtain multiple frequency response partitions.

3. The method for configuring partitioned inertia compensation in a new energy power system under limited tie-line support as described in claim 1, characterized in that, Based on the equivalent operating parameters, an extended frequency response model including each of the frequency response partitions is established, including: Based on the equivalent operating parameters of each frequency response zone, regional frequency response equations are established to characterize the corresponding frequency response zone under the action of disturbance power and tie-line power. Based on the equivalent tie support strength of the tie lines in the frequency response intervals, a tie line power equation is established to characterize the change in tie line power between adjacent frequency response intervals. The regional frequency response equations of each frequency response partition are coupled through the tie-line power equation to obtain the extended frequency response model.

4. The method for configuring partitioned inertia compensation in a new energy power system under limited tie-line support as described in claim 1, characterized in that, Setting the equivalent tie support strength of the frequency response interval tie lines for the extended frequency response model includes: Determine the set of tie lines connecting any two adjacent frequency response partitions; Based on the electrical parameters and power flow operation status of each tie line in the tie line set, calculate the line support strength corresponding to each tie line; The line support strengths corresponding to each tie line in the tie line set are aggregated to obtain the equivalent tie support strength between the two frequency response zones.

5. The method for configuring partitioned inertia compensation in a new energy power system under limited tie-line support as described in claim 1, characterized in that, For a pre-defined anticipated disturbance, the power variation of the frequency response interval tie lines is calculated based on the extended frequency response model, including: Determine the location and power of the anticipated disturbance; The target frequency response zone to which the expected disturbance belongs is determined based on the disturbance location, and the disturbance power is mapped to the zone disturbance power of the target frequency response zone; The partition disturbance power is input into the extended frequency response model to calculate the frequency deviation of each frequency response partition. The power change of the interconnect line between the adjacent frequency response zones is calculated based on the frequency deviation between them.

6. The method for configuring partitioned inertia compensation in a new energy power system under limited tie-line support as described in claim 1, characterized in that, The support reduction factor is calculated using the following method: Within a preset frequency security assessment time window, obtain the maximum absolute value of the power change of the tie line; When the power change exceeds the corresponding remaining transmission margin, the ratio between the remaining transmission margin and the maximum absolute value of the power change is determined as the support reduction coefficient.

7. The method for configuring partitioned inertia compensation in a new energy power system under limited tie-line support as described in claim 1, characterized in that, Based on the iteratively converged extended frequency response model, the minimum inertia requirement corresponding to each frequency response partition is solved, and the inertia deficit of the target frequency response partition is calculated according to the minimum inertia requirement, thereby determining the corresponding compensation configuration capacity, including: Based on the extended frequency response model after iterative convergence, the frequency security index of each frequency response partition under the candidate inertia is calculated. Determine whether the frequency security index meets the preset frequency security constraints; The minimum candidate inertia that satisfies the preset frequency security constraints is determined as the minimum inertia requirement corresponding to the frequency response partition. Calculate the inertia deficit of the target frequency response partition based on the minimum inertia requirement and the current equivalent inertia of the target frequency response partition. The compensation configuration capacity of the target frequency response partition is determined based on the inertia deficit and the unit capacity equivalent inertia of the newly added frequency support resources.

8. An electronic device, characterized in that, include: The device includes a processor, a storage medium, and a bus, wherein the storage medium stores program instructions executable by the processor. When the electronic device is running, the processor executes the program instructions to implement the steps of the partitioned inertia compensation configuration method for a new energy power system under tie-line support constraints as described in any one of claims 1-7.

9. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, which is executed by a processor to implement the steps of the partitioned inertia compensation configuration method for a new energy power system under tie-line support constraints as described in any one of claims 1-7.

10. A zoned inertia compensation configuration system for a new energy power system under limited tie-line support, characterized in that, include: The data processing module is used to acquire the operating data of the power system to be evaluated, determine multiple frequency response partitions based on the operating data, and aggregate the equivalent operating parameters of each frequency response partition. The model building module is used to establish an extended frequency response model including each frequency response partition based on the equivalent operating parameters, and to set the equivalent connection support strength of the frequency response partition connection line as the partition coupling parameter in the extended frequency response model. The support strength iteration module is used to calculate the power change of the tie lines in the frequency response interval based on the extended frequency response model in response to a preset expected disturbance, and to determine whether the power change of the tie lines exceeds the corresponding remaining transmission margin. For the tie lines whose power change exceeds the corresponding remaining transmission margin, a support reduction factor is calculated based on the power change and the remaining transmission margin. The corresponding equivalent tie support strength is corrected using the support reduction factor, and the power change is recalculated based on the extended frequency response model using the corrected equivalent tie support strength. This process is iterated until the power change of all the tie lines does not exceed the corresponding remaining transmission margin. The compensation configuration module is used to solve the minimum inertia requirement corresponding to each frequency response partition based on the extended frequency response model after iterative convergence, and to calculate the inertia deficit of the target frequency response partition according to the minimum inertia requirement, thereby determining the corresponding compensation configuration capacity.

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