Method and device for generating phase modifier configuration scheme of new energy base

Abstract

The invention provides a new energy base phase modifier configuration scheme generation method and device, and the method comprises the steps: determining the coincidence rate planning boundary conditions of a new energy base according to the configuration parameters of the new energy base through a preset new energy multi-station short circuit ratio calculation program and a power system transient stability simulation program; according to the coincidence rate planning boundary condition and the configuration parameters of the new energy base, generating a plurality of alternative phase modifier configuration schemes, performing simulation index detection on the plurality of alternative phase modifier configuration schemes, and generating a comprehensive evaluation index set corresponding to each alternative phase modifier configuration scheme; through the multi-target prediction model, the target phase modifier configuration scheme is generated according to the comprehensive evaluation index set corresponding to each alternative phase modifier configuration scheme, comprehensive evaluation is performed from multiple angles, and the safety, stability and continuity of the finally selected target phase modifier configuration scheme are ensured, so that resource configuration is reasonably planned, and the utilization rate is improved.

Description

Technical Field

[0001] This invention relates to the field of safety and stability analysis and control technology for new energy power systems, and in particular to a method and apparatus for generating synchronous condenser configuration schemes for new energy bases. Background Technology

[0002] With the widespread application of converter-based grid-connected renewable energy and static var compensators (SVC, SVG, etc.), modern power systems exhibit the "dual high" characteristics of high proportion of renewable energy and high proportion of power electronics. Due to insufficient overcurrent capacity and complex control logic of primary power electronic equipment, when short-circuit and asymmetrical faults occur and reactive voltage support is urgently needed, the equipment often experiences blockage due to insufficient withstand capability and reliability, failing to meet the high reliability requirements of the power system and unable to provide sufficient short-circuit current and capacity support. The insufficient short-circuit capacity and unreasonable equipment control strategies in "dual high" power systems lead to problems such as system overvoltage and voltage instability. In practice, this is often mitigated by reducing the output level of renewable energy power plants, severely limiting their grid-connected power generation capacity. Deploying synchronous condensers is an effective measure to improve the short-circuit ratio of multiple renewable energy power plants and reduce transient overvoltage levels. More and more energy power plants are considering deploying distributed synchronous condensers to improve their voltage support capacity to the grid. Some regions have introduced incentive policies allowing renewable energy power plants equipped with synchronous condensers to obtain differentiated power generation rights.

[0003] In related technologies, the selection method for synchronous condenser configuration schemes in new energy bases mainly considers the benefits brought by increased power generation, making it difficult to comprehensively evaluate the value of synchronous condensers. This makes it impossible to guarantee the safety, stability, and sustainability of the selected synchronous condenser configuration scheme, resulting in unreasonable resource allocation and low utilization. Summary of the Invention

[0004] One objective of this invention is to provide a method for generating synchronous condenser configuration schemes for new energy bases. This method comprehensively evaluates factors such as power system safety and stability margin, short-circuit capacity support capability, inertia support capability, new energy absorption level, and profitability, ensuring the safety, stability, and sustainability of the final selected target synchronous condenser configuration scheme, thereby rationally planning resource allocation and improving utilization. Another objective of this invention is to provide an apparatus for generating synchronous condenser configuration schemes for new energy bases. A further objective of this invention is to provide a computer-readable medium. A final objective of this invention is to provide a computer device.

[0005] To achieve the above objectives, this invention discloses a method for generating a synchronous condenser configuration scheme for a new energy base, comprising:

[0006] Obtain the configuration parameters of the new energy base;

[0007] By using the pre-set short-circuit ratio calculation program for multiple new energy power plants and the transient stability simulation program for the power system, the boundary conditions for the simultaneous rate planning of the new energy base are determined based on the configuration parameters of the new energy base.

[0008] Based on the simultaneous rate planning boundary conditions and the configuration parameters of the new energy base, multiple alternative synchronous condenser configuration schemes are generated.

[0009] Using a short-circuit ratio calculation program for multiple new energy power plants and a transient stability simulation program for power systems, simulation index testing is performed on multiple alternative synchronous condenser configuration schemes to generate a set of comprehensive evaluation indexes for each alternative synchronous condenser configuration scheme.

[0010] By using a pre-built multi-objective prediction model, a target synchronous condenser configuration scheme is generated based on the comprehensive evaluation index set corresponding to each alternative synchronous condenser configuration scheme.

[0011] Preferably, using a pre-set short-circuit ratio calculation program for multiple new energy power plants and a power system transient stability simulation program, the simultaneity rate planning boundary conditions for the new energy base are determined based on the configuration parameters of the new energy base, including:

[0012] Using a continuous method, based on the initial simultaneity rate of the new energy base, and through a preset calculation program for the short-circuit ratio of multiple new energy substations and a power system transient stability simulation program, we verify whether the short-circuit ratio and transient voltage peak value of multiple new energy substations under the configuration parameters of the new energy base reach the preset critical conditions.

[0013] If so, the current simulcast rate of new energy bases will be used as the simulcast rate of other new energy power stations;

[0014] The target simultaneity rate is defined as the target simultaneity rate of new energy power plants. Based on the target simultaneity rate of new energy power plants and the simultaneity rates of other new energy power plants, the planning boundary conditions for the simultaneity rate of new energy bases are determined.

[0015] Preferably, based on the simultaneity rate planning boundary conditions and the configuration parameters of the new energy base, multiple alternative synchronous condenser configuration schemes are generated, including:

[0016] Based on the planning boundary conditions of the simultaneity rate, generate the target simultaneity rates for multiple new energy bases;

[0017] Based on the configuration parameters of the new energy base under multiple simultaneous targets, mathematical models for optimizing the configuration of synchronous condensers are constructed respectively.

[0018] Solve the mathematical model for optimizing the configuration of each synchronous condenser to generate multiple alternative synchronous condenser configuration schemes.

[0019] Preferably, the comprehensive evaluation index set includes system safety and stability margin index, short-circuit capacity support capability index, inertia support capability index, new energy consumption level index, and profitability index;

[0020] Using a multi-station short-circuit ratio calculation program for new energy sources and a power system transient stability simulation program, simulation indicators were tested for multiple alternative synchronous condenser (SCDC) configuration schemes. This generated a comprehensive evaluation index set for each alternative SCDC configuration scheme, including:

[0021] The transient stability simulation program of the power system is used to simulate and calculate multiple alternative synchronous condenser configuration schemes, and generate transient overvoltage margin index and transient power angle stability margin index corresponding to each alternative synchronous condenser configuration scheme.

[0022] Based on the transient overvoltage margin index and the transient power angle stability margin index, the system safety and stability margin index is generated.

[0023] The short-circuit ratio calculation program for multiple new energy power plants is used to simulate and calculate multiple alternative synchronous condenser configuration schemes, and generate the short-circuit capacity increment, short-circuit ratio increment and short-circuit current increment corresponding to each alternative synchronous condenser configuration scheme.

[0024] The short-circuit capacity support capability index is generated based on the short-circuit capacity increment, short-circuit ratio increment, and short-circuit current increment.

[0025] Using a power system transient stability simulation program, simulation calculations are performed on multiple alternative synchronous condenser configuration schemes to generate the system inertia constant increment, minimum frequency increment, frequency change rate increment, and frequency recovery time increment for each alternative synchronous condenser configuration scheme.

[0026] Inertia support capability index is generated based on the system inertia constant increment, minimum frequency increment, frequency change rate increment, and frequency recovery time increment.

[0027] Using a power system transient stability simulation program, simulation calculations are performed on multiple alternative synchronous condenser configuration schemes to generate the transmission limit, annual utilization hours, reduction in restricted renewable energy power generation, increase in renewable energy absorption rate, and reduction in curtailment rate for each alternative synchronous condenser configuration scheme.

[0028] Based on the transmission limit, annual utilization hours, reduction in restricted renewable energy generation, increase in renewable energy consumption rate, and reduction in curtailment rate, renewable energy consumption level indicators are generated.

[0029] Based on the power prediction curves corresponding to multiple alternative synchronous condenser configuration schemes, a profitability index is generated for each alternative synchronous condenser configuration scheme.

[0030] Preferably, a target synchronous condenser configuration scheme is generated by using a pre-built multi-objective prediction model based on the comprehensive evaluation index set corresponding to each candidate synchronous condenser configuration scheme, including:

[0031] Using a multi-objective prediction model, the importance of the comprehensive evaluation index set corresponding to each alternative synchronous condenser configuration scheme is predicted, and the importance index corresponding to the alternative synchronous condenser configuration scheme is generated.

[0032] The importance indicators are ranked, and the alternative synchronous condenser configuration schemes corresponding to the specified importance indicators are determined as the target synchronous condenser configuration schemes.

[0033] Preferably, the method further includes:

[0034] Construct a multi-objective indicator dataset, which includes multiple sets of training indicators and the importance labels corresponding to each set of training indicators;

[0035] A multi-objective prediction model is constructed by training multiple sets of training indicators and the importance labels corresponding to each set of training indicators using a machine learning model.

[0036] This invention also discloses a device for generating a synchronous condenser configuration scheme for a new energy base, comprising:

[0037] The parameter acquisition unit is used to acquire the configuration parameters of the new energy base;

[0038] The boundary condition determination unit is used to determine the simultaneous rate planning boundary conditions of the new energy base based on the configuration parameters of the new energy base by using a preset new energy multi-station short-circuit ratio calculation program and power system transient stability simulation program.

[0039] The alternative scheme generation unit is used to generate multiple alternative synchronous condenser configuration schemes based on the simultaneity rate planning boundary conditions and the configuration parameters of the new energy base.

[0040] The simulation index detection unit is used to perform simulation index detection on multiple alternative synchronous condenser configuration schemes through the short-circuit ratio calculation program of new energy multi-station and the transient stability simulation program of power system, and generate a set of comprehensive evaluation indexes corresponding to each alternative synchronous condenser configuration scheme.

[0041] The target scheme generation unit is used to generate a target synchronous condenser configuration scheme based on the comprehensive evaluation index set corresponding to each alternative synchronous condenser configuration scheme through a pre-built multi-objective prediction model.

[0042] The present invention also discloses a computer-readable medium having a computer program stored thereon, which, when executed by a processor, implements the method described above.

[0043] The present invention also discloses a computer device, including a memory and a processor, wherein the memory is used to store information including program instructions, and the processor is used to control the execution of the program instructions, wherein the processor executes the program to implement the method described above.

[0044] The present invention also discloses a computer program product, including a computer program / instruction, which, when executed by a processor, implements the method described above.

[0045] This invention obtains the configuration parameters of a new energy base; through a pre-set short-circuit ratio calculation program for multiple new energy power plants and a power system transient stability simulation program, it determines the simultaneity rate planning boundary conditions for the new energy base based on the configuration parameters; based on the simultaneity rate planning boundary conditions and the configuration parameters of the new energy base, it generates multiple alternative synchronous condenser (SCDC) configuration schemes; through the new energy multi-power plant short-circuit ratio calculation program and the power system transient stability simulation program, it performs simulation index testing on the multiple alternative SCDC configuration schemes, generating a comprehensive evaluation index set corresponding to each alternative SCDC configuration scheme; through a pre-constructed multi-objective prediction model, it generates a target SCDC configuration scheme based on the comprehensive evaluation index set corresponding to each alternative SCDC configuration scheme, comprehensively evaluating it from the aspects of power system safety and stability margin, short-circuit capacity support capability, inertia support capability, new energy absorption level, and profitability, ensuring the safety, stability, and sustainability of the finally selected target SCDC configuration scheme, thereby rationally planning resource allocation and improving utilization. Attached Figure Description

[0046] 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.

[0047] Figure 1 A flowchart illustrating a method for generating a synchronous condenser configuration scheme for a new energy base, as provided in an embodiment of the present invention;

[0048] Figure 2 A flowchart illustrating another method for generating a synchronous condenser configuration scheme for a new energy base, as provided in an embodiment of the present invention;

[0049] Figure 3 This is a schematic diagram of a device for generating a synchronous condenser configuration scheme for a new energy base, provided in an embodiment of the present invention.

[0050] Figure 4 This is a schematic diagram of the structure of a computer device provided in an embodiment of the present invention. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] To facilitate understanding of the technical solutions provided in this application, the relevant content of the technical solutions is explained below. This invention establishes a comprehensive benefit evaluation index system for synchronous condensers in new energy bases from five aspects: power system safety and stability margin, short-circuit capacity support capability, inertia support capability, new energy absorption level, and profitability, thereby improving the comprehensiveness of the evaluation. Among them, the safety and stability margin index considers the improvement effect of synchronous condensers on voltage stability margin and transient stability margin, and evaluates the changes in the system's response performance to fault disturbances before and after the configuration of synchronous condensers through simulation calculations. The short-circuit capacity support capability index mainly examines the degree of improvement and distribution characteristics of the regional power grid's short-circuit ratio (SCR) after the synchronous condenser is put into operation, which helps to optimize the operating point of new energy power generation and improve the grid's ability to carry new energy. The inertia support capability index reflects the contribution of synchronous condensers to improving the overall inertia level in the regional power grid, and is quantitatively evaluated through frequency dynamic response simulation calculations. The new energy absorption level index evaluates the increase in the penetration rate of new energy electricity after the implementation of the synchronous condenser scheme, and is evaluated using the degree of reduction in the limited capacity of new energy power generation based on actual operating data. The profitability index combines equipment investment costs, operation and maintenance costs, and operating revenue, and comprehensively considers the project's economic benefits using the annualized cost method.

[0053] The following uses a synchronous condenser configuration scheme generation device for a new energy base as an example to illustrate the implementation process of the synchronous condenser configuration scheme generation method for a new energy base provided in this embodiment of the invention. It is understood that the execution entity of the synchronous condenser configuration scheme generation method for a new energy base provided in this embodiment of the invention includes, but is not limited to, a synchronous condenser configuration scheme generation device for a new energy base.

[0054] Figure 1 A flowchart illustrating a method for generating a synchronous condenser configuration scheme for a new energy base, as provided in an embodiment of the present invention, is shown below. Figure 1 As shown, the method includes:

[0055] Step 101: Obtain the configuration parameters of the new energy base.

[0056] In this embodiment of the invention, the configuration parameters of the new energy base include, but are not limited to, network model data, available resource data of the new energy power station, candidate synchronous condenser parameters, and a list of monitoring buses. The candidate synchronous condenser parameters include candidate synchronous condenser model parameters and technical and economic parameters.

[0057] Step 102: Using the preset short-circuit ratio calculation program for multiple new energy power plants and the transient stability simulation program for the power system, determine the boundary conditions for the simultaneous rate planning of the new energy base based on the configuration parameters of the new energy base.

[0058] In this embodiment of the invention, the short-circuit ratio calculation program for multiple new energy power plants and the power system transient stability simulation program are functional modules in the PSD-BPA software. The short-circuit ratio calculation program for multiple new energy power plants corresponds to the SCCP functional module, and the power system transient stability simulation program corresponds to the SWNT functional module.

[0059] In this embodiment of the invention, the simultaneous rate planning boundary conditions include the simultaneous rate of the target new energy power station and the simultaneous rate of other new energy power stations.

[0060] Step 103: Based on the simultaneity rate planning boundary conditions and the configuration parameters of the new energy base, generate multiple alternative synchronous condenser configuration schemes.

[0061] In this embodiment of the invention, different simultaneous rates of target new energy power stations are set to form different simultaneous rate planning boundary conditions; based on the different simultaneous rate planning boundary conditions and the configuration parameters of the new energy base, multiple alternative synchronous condenser configuration schemes are solved.

[0062] Step 104: Using the new energy multi-station short-circuit ratio calculation program and the power system transient stability simulation program, perform simulation index testing on multiple alternative synchronous condenser configuration schemes, and generate a comprehensive evaluation index set corresponding to each alternative synchronous condenser configuration scheme.

[0063] In this embodiment of the invention, the comprehensive evaluation index set includes system safety and stability margin index, short-circuit capacity support capability index, inertia support capability index, new energy consumption level index, and profitability index.

[0064] Step 105: Using a pre-built multi-objective prediction model, generate the target synchronous condenser configuration scheme based on the comprehensive evaluation index set corresponding to each alternative synchronous condenser configuration scheme.

[0065] In this embodiment of the invention, the multi-objective prediction model is constructed based on machine learning algorithms. Specifically, a multi-objective indicator dataset is constructed, which includes multiple training indicator sets and importance labels corresponding to each training indicator set. A machine learning model is then used to train the multiple training indicator sets and the importance labels corresponding to each training indicator set to construct the multi-objective prediction model. As an optional approach, the machine learning algorithm includes, but is not limited to, random forest regression, XGBoost, LightGBM, or neural networks.

[0066] The technical solution provided in this invention involves obtaining the configuration parameters of a new energy base; determining the simultaneity rate planning boundary conditions of the new energy base based on the configuration parameters using a pre-set short-circuit ratio calculation program for multiple new energy power plants and a power system transient stability simulation program; generating multiple candidate synchronous condenser (SCDC) configuration schemes based on the simultaneity rate planning boundary conditions and the configuration parameters of the new energy base; performing simulation index testing on the multiple candidate SCDC configuration schemes using the same program to generate a comprehensive evaluation index set for each candidate SCDC configuration scheme; and generating a target SCDC configuration scheme based on a pre-constructed multi-objective prediction model and the comprehensive evaluation index set for each candidate SCDC configuration scheme. This process comprehensively evaluates the target SCDC configuration scheme from the perspectives of power system safety and stability margin, short-circuit capacity support capability, inertia support capability, new energy absorption level, and profitability, ensuring the safety, stability, and sustainability of the final selected target SCDC configuration scheme, thereby rationally planning resource allocation and improving utilization.

[0067] Figure 2 A flowchart illustrating another method for generating a synchronous condenser configuration scheme for a new energy base, as provided in this embodiment of the invention, is shown below. Figure 2 As shown, the method includes:

[0068] Step 201: Obtain the configuration parameters of the new energy base.

[0069] In this embodiment of the invention, the configuration parameters of the new energy base include, but are not limited to, network model data, available resource data of the new energy power station, candidate synchronous condenser parameters, and a list of monitoring buses. The candidate synchronous condenser parameters include candidate synchronous condenser model parameters and technical and economic parameters.

[0070] Network model data includes, but is not limited to, network power flow calculation data and transient stability calculation data, which can usually be taken from typical annual operating scenarios.

[0071] Available resource data for new energy power plants and available resource data for collection stations include, but are not limited to, land resources for configuring synchronous condensers, candidate buses, the single-unit capacity and number of synchronous condensers allowed to be configured on each candidate bus, and the self-consumption electricity price within the station.

[0072] The parameters of the candidate synchronous condenser body include, but are not limited to, the parameters of the synchronous condenser, its control system, and the terminal transformer used for power flow calculation and stability calculation.

[0073] Technical and economic parameters include, but are not limited to, synchronous condenser model, capacity, initial equipment investment, power loss rate, installation cost, modification cost, and operation and maintenance cost.

[0074] The monitoring bus is determined according to the power grid safety and stability calculation specifications, and is usually selected from the high-voltage bus of the generator terminal of new energy units, new energy power plants and collection stations.

[0075] Step 202: Using a continuous method, based on the initial simultaneity rate of the new energy base, and through the preset new energy multi-station short-circuit ratio calculation program and power system transient stability simulation program, verify whether the multi-station short-circuit ratio and transient voltage peak value under the configuration parameters of the new energy base reach the preset critical conditions. If yes, proceed to step 203; otherwise, proceed to step 202.

[0076] In this embodiment of the invention, a continuous method is adopted. The initial simultaneity rate of the new energy base is gradually increased according to a specified simultaneity rate interval. The short-circuit ratio of the new energy multi-station is verified by the new energy multi-station short-circuit ratio calculation program to see if the short-circuit ratio of the selected monitoring bus meets the lower limit requirement of the short-circuit ratio in the critical condition. The transient voltage peak level of the selected monitoring bus is verified by the electromechanical transient simulation program to see if it meets the transient voltage peak critical condition in the critical condition. If both are yes, it indicates that the preset critical condition has been met, and step 203 is continued. If at least one is no, it indicates that the critical condition has not been met, and step 202 is continued until the critical condition is met.

[0077] Step 203: Determine the current simulcast rate of new energy bases as the simulcast rate of other new energy power stations.

[0078] In this embodiment of the invention, the current simulcast rate of new energy bases under critical conditions is determined as the simulcast rate of other new energy power stations.

[0079] Step 204: Determine the preset target simultaneity rate as the target simultaneity rate of new energy power plants. Based on the target simultaneity rate of new energy power plants and the simultaneity rates of other new energy power plants, determine the planning boundary conditions for the simultaneity rate of new energy bases.

[0080] In this embodiment of the invention, the target simultaneity rate can be set according to actual needs, and this embodiment of the invention does not limit it. As an optional solution, the target simultaneity rate is 0.7, 0.75, or 0.8.

[0081] In this embodiment of the invention, the planning boundary condition for the simultaneity rate of the new energy base is determined as the simultaneity rate of the target new energy power station and the simultaneity rate of other new energy power stations.

[0082] Step 205: Based on the simultaneity rate, plan the boundary conditions and generate the target simultaneity rates for multiple new energy bases.

[0083] In this embodiment of the invention, the new energy base includes multiple new energy power stations; the target simultaneity rate of the new energy base includes the target simultaneity rate of the new energy power stations and the simultaneity rate of other new energy power stations. Specifically, by setting multiple target simultaneity rates of the new energy power stations, multiple simultaneity rate planning boundary conditions are generated; the average value of the target simultaneity rate of the new energy power stations and the simultaneity rate of other new energy power stations in each simultaneity rate planning boundary condition is solved, and this average value is determined as the target simultaneity rate of the new energy base, thereby obtaining the target simultaneity rates of multiple new energy bases.

[0084] Step 206: Based on the configuration parameters of the new energy base under multiple simultaneous target rates, construct mathematical models for the optimal configuration of synchronous condensers.

[0085] In this embodiment of the invention, the mathematical model for camera optimization configuration takes minimizing the sum of investment cost, operating cost and maintenance cost as the objective function, and uses power flow balance constraints and operating constraints, short-circuit ratio constraints of multiple new energy power stations, transient voltage peak constraints, and constraints on the number of synchronous condensers installed on the same candidate bus as constraints.

[0086] Specifically, based on the configuration parameters of new energy bases under different target simultaneity rates, corresponding mathematical models for optimizing the configuration of synchronous condensers are constructed.

[0087] It is worth noting that the synchronous condenser optimization configuration data model can be constructed according to actual needs. This application only needs to construct the synchronous condenser optimization configuration mathematical model according to the configuration parameters of the new energy base under different target simultaneity rates.

[0088] Step 207: Solve the mathematical model for the optimal configuration of each synchronous condenser to generate multiple alternative synchronous condenser configuration schemes.

[0089] In this embodiment of the invention, for each synchronous condenser, the mathematical model for optimal configuration is used to calculate the short-circuit ratio sensitivity of all candidate buses for new energy multi-station applications, and a sensitivity matrix is ​​constructed. Based on the sensitivity matrix, the mathematical model for optimal synchronous condenser configuration is transformed into an equivalent simplified model, and the equivalent simplified model is solved to obtain multiple candidate synchronous condenser configuration schemes. Each candidate synchronous condenser configuration scheme corresponds to a target simultaneity rate.

[0090] Specifically, the short-circuit ratio sensitivity of multiple new energy power stations is calculated using the following formula:

[0091]

[0092] in, V represents the impact of adding a new synchronous condenser of type p on the short-circuit ratio of multiple renewable energy substations at bus i in the power grid; that is, the sensitivity of the short-circuit ratio of multiple renewable energy substations at bus i with respect to the synchronous condenser of type p. i P represents the actual operating voltage of bus i;j Z represents the active power injected by new energy sources into bus j; n represents the number of buses; ij Z represents the Thevenin equivalent mutual impedance between bus i and bus j; ki Z represents the Thevenin equivalent mutual impedance between bus k and bus i; kj Z represents the Thevenin equivalent mutual impedance between bus k and bus j; kk This represents the Thevenin equivalent self-impedance of bus k; This represents the equivalent ground impedance of the synchronous condenser and its connected grid-connected transformer after bus k is connected to a synchronous condenser of model p.

[0093] Step 208: Using a power system transient stability simulation program, perform simulation calculations on multiple alternative synchronous condenser configuration schemes to generate transient overvoltage margin and transient power angle stability margin for each alternative synchronous condenser configuration scheme.

[0094] In this embodiment of the invention, a power system transient stability simulation program is used to simulate and calculate multiple alternative synchronous condenser (SRDC) configuration schemes, generating the current simulcast rate of renewable energy bases under the current operating state for each alternative SRDC configuration scheme. The following formula is used to calculate the current simulcast rate of renewable energy bases under the current operating state and the simulcast rate of renewable energy bases corresponding to the transient overvoltage critical point, generating a transient overvoltage margin index. The transient overvoltage margin reflects the system's ability to increase renewable energy power output before a transient overvoltage occurs. The transient overvoltage margin can be defined as the percentage distance between the current operating state and the transient overvoltage critical point (such as the current simulcast rate of renewable energy bases under critical conditions):

[0095]

[0096] Among them, M vs η is a transient overvoltage margin indicator. cr η0 represents the simultaneous rate of the new energy base corresponding to the transient overvoltage critical point, and η0 represents the current simultaneous rate of the new energy base under the current operating state.

[0097] In this embodiment of the invention, a power system transient stability simulation program is used to simulate and calculate multiple alternative synchronous condenser (SCDC) configuration schemes, generating the critical clearing time, system inertia center angle, and rotor angle corresponding to each alternative SCDC configuration scheme. The critical clearing time is calculated using the following formula to generate a transient stability margin expressed as a critical clearing time index. The transient stability margin describes the margin level by which the system can maintain synchronous and stable operation after a disturbance occurs. The critical clearing time (CCT) is defined as the maximum allowable fault clearing time for the system to recover stability after a disturbance. A longer CCT after the SCDC is put into operation indicates an improvement in the transient stability margin.

[0098]

[0099] Where, ΔT cct The transient stability margin is represented by the critical resection time index, which is the difference between the minimum critical resection time before and after the synchronous condenser deployment. Minimum critical cut-off time after camera deployment; Minimum critical cut-off time before camera deployment; N ctg The number of faults in a given fault set; Let be the critical clearance time under the c-th given fault.

[0100] Transient stability margin can also be expressed using the power angle margin index. The following formula is used to calculate the transient stability margin expressed using the power angle margin index, based on the system's center of inertia angle and rotor angle. The power angle margin is defined as the distance between the maximum power angle oscillation after a system disturbance and the critical power angle for instability. An increase in the power angle margin after the synchronous condenser is put into operation indicates an improvement in transient stability margin.

[0101]

[0102] δ coi,max =max{(δ i -δ coi,cr | i = 1, 2, ..., N g}

[0103] Δδ coi The transient stability margin is expressed using the power angle margin index, which is the difference between the maximum inertia center angle before and after the synchronous condenser is deployed. To adjust the maximum inertia center angle difference after the camera is deployed; To adjust the maximum inertia center angle difference before camera deployment; δ i Let δ be the rotor angle of the i-th synchronous generator; coi,cr N is the angle of the system's center of inertia. g This represents the total number of synchronous generators.

[0104] It is worth noting that margin is defined as the distance between the current operating point of the system and the critical point of system instability. The greater the distance, the safer the system. The comparison of margins of different schemes reflects their relative advantages and disadvantages.

[0105] Step 209: Generate the system safety and stability margin index based on the transient overvoltage margin index and the transient power angle stability margin index.

[0106] In this embodiment of the invention, the transient overvoltage margin index and the transient power angle stability margin index can be determined as the system safety and stability margin index; alternatively, the transient overvoltage margin index and the transient power angle stability margin index can be weighted according to preset different weights to generate the system safety and stability margin index.

[0107] Step 210: Using the new energy multi-site short-circuit ratio calculation program, perform simulation calculations on multiple alternative synchronous condenser configuration schemes to generate the short-circuit capacity increment, short-circuit ratio increment, and short-circuit current increment corresponding to each alternative synchronous condenser configuration scheme.

[0108] In this embodiment of the invention, a short-circuit ratio calculation program for multiple new energy power stations is used to simulate and calculate multiple alternative synchronous condenser (SCDC) configuration schemes, generating the short-circuit capacity of each node corresponding to each alternative SCDC configuration scheme. The short-circuit capacity of each node is calculated using the following formula to generate the short-circuit capacity increment. Short-circuit capacity characterizes the ability of a node to withstand short-circuit current, defined as the product of the three-phase short-circuit current and the nominal voltage of the node, typically expressed in megavolt-amperes (MVA):

[0109]

[0110] Where, ΔS sc,i This represents the short-circuit capacity increment of node i; To adjust the short-circuit capacity of node i after the camera is deployed; To adjust the short-circuit capacity of node i before the camera is deployed.

[0111] In this embodiment of the invention, a short-circuit ratio calculation program for multiple renewable energy power plants is used to simulate and calculate multiple alternative synchronous condenser (SCDC) configuration schemes, generating the renewable energy power plant short-circuit ratio for each node corresponding to each alternative SCDC configuration scheme. The following formula is used to calculate the renewable energy power plant short-circuit ratio for each node, generating the short-circuit ratio increment. The short-circuit ratio characterizes the strength of the grid's ability to accommodate renewable energy, and is defined as the ratio of the short-circuit capacity at the grid connection point to the installed capacity of the grid-connected renewable energy:

[0112]

[0113] Where, Δζ mrscr,i The increment of the short-circuit ratio at node i; To adjust the short-circuit ratio of new energy multi-sites at node i after the synchronous condenser is deployed; To adjust the short-circuit ratio of new energy multi-site stations at node i before the deployment of the camera.

[0114] In this embodiment of the invention, a short-circuit ratio calculation program for multiple new energy power stations is used to simulate and calculate multiple alternative synchronous condenser (SCDC) configuration schemes, generating the short-circuit current of each node corresponding to each alternative SCDC configuration scheme. The short-circuit current increment of each node is calculated using the following formula. The increase in short-circuit current at the grid-connected node after the SCDC is put into operation reflects the direct contribution of the SCDC to the short-circuit support capability:

[0115]

[0116] Where, ΔI sc,iLet i be the increment of the short-circuit current at node i; The short-circuit current after the camera is deployed; The short-circuit current before the camera is deployed.

[0117] It is worth noting that the short-circuit current and short-circuit ratio can be calculated using a power system short-circuit calculation program, allowing for a comparison of the changes in indicators before and after the synchronous condenser is put into operation.

[0118] Step 211: Generate short-circuit capacity support capability index based on short-circuit capacity increment, short-circuit ratio increment, and short-circuit current increment.

[0119] In this embodiment of the invention, the increment of short-circuit capacity, the increment of short-circuit ratio, and the increment of short-circuit current can be determined as the system safety and stability margin indicators; alternatively, the increment of short-circuit capacity, the increment of short-circuit ratio, and the increment of short-circuit current can be weighted according to preset different weights to generate a short-circuit capacity support capability indicator.

[0120] In this embodiment of the invention, the improvement in short-circuit capacity support capability reflects the enhancing effect of synchronous condensers on the short-circuit current level, short-circuit capacity, and short-circuit ratio (SCR) of the power grid. It is an important indicator for measuring the stability of the power grid and the capacity for renewable energy absorption in areas where renewable energy is gathered.

[0121] Step 212: Using a power system transient stability simulation program, perform simulation calculations on multiple alternative synchronous condenser configuration schemes to generate the system inertia constant increment, minimum frequency increment, frequency change rate increment, and frequency recovery time increment corresponding to each alternative synchronous condenser configuration scheme.

[0122] In this embodiment of the invention, a power system transient stability simulation program is used to simulate and calculate multiple alternative synchronous condenser (SCDC) configuration schemes, generating the individual inertia constant corresponding to each alternative SCDC configuration scheme. The individual inertia constant is then calculated using the following formula to generate the system inertia constant increment. The system inertia constant includes the individual inertia constants of multiple generators or SCDCs within the system, describing the overall kinetic energy storage capacity of the system. The higher the inertia constant, the stronger the system's resistance to frequency disturbances. The system inertia constant can be calculated based on a weighted average of the generator's rotational inertia and capacity:

[0123]

[0124] Where, ΔH sys This represents the increment of the system's inertia constant. The system inertia constant after the camera is deployed; For the system inertia constant after the camera is deployed; H i S is the single-unit inertia constant (s) of the i-th generator or synchronous condenser; Ni The rated capacity (MVA) of the i-th generator or synchronous condenser.

[0125] In this embodiment of the invention, a power system transient stability simulation program is used to simulate and calculate multiple alternative synchronous condenser (SRDC) configuration schemes, generating the minimum frequency value corresponding to each SRDC configuration scheme. The minimum frequency increment is then generated by calculating the minimum frequency value using the following formula. The minimum frequency value is the lowest frequency decrease in the system after a disturbance; the greater the inertia, the slower the frequency decreases, and the higher the minimum frequency point.

[0126]

[0127] Where, Δf min This is the lowest frequency increment; This is the lowest frequency value after the camera is deployed; This is the lowest frequency value before the camera is deployed.

[0128] In this embodiment of the invention, a power system transient stability simulation program is used to simulate and calculate multiple alternative synchronous condenser (SRDC) configuration schemes, generating the minimum frequency value corresponding to each SRDC configuration scheme. The minimum frequency increment is then generated by calculating the minimum frequency value using the following formula. The minimum frequency value is the lowest frequency decrease in the system after a disturbance; the greater the inertia, the slower the frequency decreases, and the higher the minimum frequency point.

[0129]

[0130] Where, Δf min This is the lowest frequency increment; This is the lowest frequency value after the camera is deployed; This is the lowest frequency value before the camera is deployed.

[0131] In this embodiment of the invention, a power system transient stability simulation program is used to simulate and calculate multiple alternative synchronous condenser (SRDC) configuration schemes, generating the frequency change rate corresponding to each scheme. The frequency change rate (RoCoF) is calculated using the following formula to generate the frequency change rate increment. The frequency change rate is the rate at which the frequency changes over time in the initial stage of a frequency disturbance. The stronger the inertia support capability, the smaller the absolute value of RoCoF.

[0132] ΔRoCoF=RoCoF 1 -RoCoF 0

[0133]

[0134] Where ΔRoCoF is the rate of change of frequency; RoCoF 1 To adjust the frequency change rate after camera deployment; RoCoF 0Δf represents the frequency change rate before the camera is deployed; Δt represents the frequency change; and Δt represents the time change.

[0135] In this embodiment of the invention, a power system transient stability simulation program is used to simulate and calculate multiple alternative synchronous condenser (SCDC) configuration schemes, generating the frequency recovery time corresponding to each scheme. The frequency recovery time is then calculated using the following formula to generate the frequency recovery time increment. The frequency recovery time is the time required for the system frequency to recover from its lowest point to within the allowable stable range; the larger the inertia, the faster the recovery speed generally is.

[0136]

[0137] Where, ΔT FR This is the frequency recovery time increment; To adjust the frequency recovery time after the camera is deployed; Frequency recovery time before camera deployment.

[0138] It is worth noting that among the above indicators, the system inertia constant H sys The rate of change of frequency (RoCoF) is the most typical and intuitive indicator for evaluating inertia support capability.

[0139] Step 213: Generate inertia support capability index based on the system inertia constant increment, minimum frequency increment, frequency change rate increment, and frequency recovery time increment.

[0140] In this embodiment of the invention, the system inertia constant increment, minimum frequency increment, frequency change rate increment, and frequency recovery time increment can be determined as system safety and stability margin indicators; alternatively, the system inertia constant increment, minimum frequency increment, frequency change rate increment, and frequency recovery time increment can be weighted according to preset different weights to generate an inertia support capability indicator.

[0141] In this embodiment of the invention, the inertia support capability is mainly reflected in the power system's response performance to frequency disturbances, which can be quantitatively evaluated through key indicators such as the system inertia constant increment, minimum frequency increment, frequency change rate increment, and frequency recovery time increment.

[0142] Step 214: Using a power system transient stability simulation program, perform simulation calculations on multiple alternative synchronous condenser configuration schemes to generate the transmission limit, annual utilization hours, reduction in restricted renewable energy power generation, increase in renewable energy absorption rate, and reduction in curtailment rate for each alternative synchronous condenser configuration scheme.

[0143] In this embodiment of the invention, a power system transient stability simulation program is used to simulate and calculate multiple alternative synchronous condenser (SCDC) configuration schemes, generating the allowable output of the renewable energy base corresponding to each alternative SCDC configuration scheme. The allowable output of the renewable energy base is calculated using the following formula to generate the transmission limit. The transmission limit represents the percentage of the maximum renewable energy output actually allowed to operate in the current renewable energy aggregation area, considering safety and stability constraints, relative to the installed capacity of that area; that is, the utilization rate of the power generation capacity under operating conditions.

[0144]

[0145] Where η% is the output limit; P gi,allowed The allowed output (MW) of the i-th new energy unit; P gN,i N represents the rated capacity (MW) of the i-th new energy unit; g This refers to the number of new energy generating units.

[0146] In this embodiment of the invention, a power system transient stability simulation program is used to simulate and calculate multiple alternative synchronous condenser (SCDC) configuration schemes, generating the actual output for each time period corresponding to each alternative SCDC configuration scheme. The actual output for each time period is calculated using the following formula to generate the annual utilization hours. The annual utilization hours of a new energy unit refer to the number of operating hours of the new energy unit converted from its actual annual power generation to its rated power, reflecting the actual utilization rate of the equipment.

[0147]

[0148] Among them, H auh,i P represents the operating hours of the i-th new energy unit; g,i (t) represents the actual output (MW) of the i-th new energy unit in the i-th time period; P gN,i Let be the rated capacity (MW) of the i-th new energy unit.

[0149] Correspondingly, the annual utilization hours of the entire new energy base are:

[0150]

[0151] Among them, H auh The annual utilization hours of the new energy base; P g,i (t) represents the actual output (MW) of the i-th new energy unit in the i-th time period; P gN,i N represents the rated capacity (MW) of the i-th new energy unit; g This refers to the number of new energy generating units.

[0152] In this embodiment of the invention, a power system transient stability simulation program is used to simulate and calculate multiple alternative synchronous condenser (SCDC) configuration schemes, generating the power generation constraint corresponding to each alternative SCDC configuration scheme. The power generation constraint is then calculated using the following formula to generate the reduction in restricted renewable energy power generation. After the SCDC is put into operation, the reduction in restricted renewable energy power generation is the most intuitive and important evaluation indicator:

[0153]

[0154] Where, ΔE curt The reduction in restricted electricity generation from new energy sources (MWh); The amount of renewable energy generation restricted after the synchronous condenser is put into operation (MWh); Limited renewable energy generation capacity (MWh) before synchronous condenser is put into operation.

[0155] In this embodiment of the invention, a power system transient stability simulation program is used to simulate and calculate multiple alternative synchronous condenser (SCDC) configuration schemes, generating the actual power consumption corresponding to each alternative SCDC configuration scheme. The actual power consumption is then calculated using the following formula to generate the increase in the renewable energy consumption rate. The increase in the renewable energy consumption rate is the ratio of the actual renewable energy utilization to the theoretically generated renewable energy:

[0156]

[0157] Where, ΔR accom The percentage increase in the renewable energy consumption rate; The actual amount of electricity consumed by new energy sources after the deployment of synchronous condensers (MWh); Actual renewable energy consumption (MWh) before the deployment of synchronous condensers; E potential This represents the theoretically achievable maximum power generation (MWh) based on wind and solar resources.

[0158] In this embodiment of the invention, a power system transient stability simulation program is used to simulate and calculate multiple alternative synchronous condenser (SCDC) configuration schemes, generating the actual grid-connected power generation corresponding to each alternative SCDC configuration scheme. The actual grid-connected power generation is then calculated using the following formula to generate the reduction in curtailment rate. The curtailment rate represents the proportion of renewable energy that is forcibly curtailed due to grid instability or limited transmission capacity, relative to the total available power generation.

[0159]

[0160] Where, ΔD curt The percentage reduction in curtailment rate; The actual grid-connected power generation (MWh) after the synchronous condenser is deployed; Actual grid-connected power generation (MWh) before synchronous condenser deployment; E potentialThis refers to the actual grid-connected power generation (MWh) that can theoretically be achieved based on wind and solar resources.

[0161] Discarded electricity Equal to the theoretical power generation E potential Subtract actual grid-connected power generation

[0162] Step 215: Generate a renewable energy consumption level index based on the transmission limit, annual utilization hours, reduction in renewable energy power generation curtailment, increase in renewable energy consumption rate, and reduction in curtailment rate.

[0163] In this embodiment of the invention, the transmission limit, annual utilization hours, reduction in restricted renewable energy generation, increase in renewable energy absorption rate, and reduction in curtailment rate can be determined as indicators of system safety and stability margin. Alternatively, the transmission limit, annual utilization hours, reduction in restricted renewable energy generation, increase in renewable energy absorption rate, and reduction in curtailment rate can be weighted according to preset different weights to generate renewable energy absorption level indicators.

[0164] Step 216: Based on the power prediction curves corresponding to multiple alternative synchronous condenser configuration schemes, generate the profitability index corresponding to each alternative synchronous condenser configuration scheme.

[0165] In this embodiment of the invention, the profitability indicators mainly reflect the cost-benefit of investing in synchronous condensers. Specifically, these include cost estimates, projected annual power generation (MWh), and projected annual revenue (ten thousand yuan).

[0166] The cost estimate is as follows: The cost of a synchronous condenser deployment plan consists of two parts: fixed costs and variable costs. The fixed costs of a synchronous condenser mainly include one-time equipment investment and construction costs, specifically including:

[0167] 1) The one-time investment in the synchronous condenser itself and its supporting equipment;

[0168] 2) One-time renovation and installation costs;

[0169] 3) Land costs, etc.

[0170] The variable costs of a synchronous condenser mainly include operation and maintenance costs and power consumption, specifically including:

[0171] 1) Overhaul cost (ten thousand yuan / year);

[0172] 2) Minor repair costs (ten thousand yuan / year);

[0173] 3) Cost of power loss (ten thousand yuan / year).

[0174] The projected annual power generation increase (MWh) refers to the increase in annual power generation due to the deployment of synchronous condensers, which improves grid stability or reduces curtailment rates. Numerically, it equals the annual power generation after the synchronous condensers are put into operation (MWh) minus the annual power generation before the measures are implemented (MWh).

[0175] ΔE est =E est -E est,0

[0176] Where, ΔE est To increase annual power generation, E est E is the estimated annual power generation after the deployment of the synchronous condenser. est,0 This represents the estimated annual power generation before the deployment of the synchronous condenser. The estimated annual power generation is calculated using a power prediction curve derived from power integration. This power prediction curve can be obtained from the wind speed-power curve provided by the manufacturer.

[0177] The projected increase in annual revenue (in ten thousand yuan) refers to the improved economic benefits brought about by the increase in power generation, namely: the increase in annual revenue obtained by multiplying the increased power generation by the on-grid price or market transaction price of new energy.

[0178]

[0179] Where, ΔB est For the projected increase in annual revenue; ΔE est,k Increase the annual power generation of station k; β k For the on-grid electricity price of the power station k; N s This refers to the number of stations.

[0180] Step 217: Using a multi-objective prediction model, predict the importance of the comprehensive evaluation index set corresponding to each alternative synchronous condenser configuration scheme, and generate the importance index corresponding to the alternative synchronous condenser configuration scheme.

[0181] Specifically, the importance of the comprehensive evaluation index set corresponding to each alternative synchronous condenser configuration scheme is predicted and input into a multi-objective prediction model to calculate the importance index, and the importance index corresponding to each alternative synchronous condenser configuration scheme is output.

[0182] Step 218: Sort the importance indicators and determine the alternative synchronous condenser configuration schemes corresponding to the specified importance indicators as the target synchronous condenser configuration schemes.

[0183] In this embodiment of the invention, the greater the importance index, the better the overall evaluation of the corresponding alternative camera configuration scheme and the higher the user satisfaction.

[0184] In this embodiment of the invention, the importance indicators are sorted from largest to smallest, and the candidate synchronous condenser configuration schemes corresponding to the top k importance indicators are determined as the target synchronous condenser configuration schemes.

[0185] It is worth noting that the value of the specified sorting k can be set according to actual needs, and this embodiment of the invention does not limit this.

[0186] It is worth noting that the acquisition, storage, use, and processing of data in the technical solution of this application all comply with relevant laws and regulations. The user information in the embodiments of this application was obtained through legal and compliant means, and the acquisition, storage, use, and processing of user information have been authorized and agreed upon by the client.

[0187] It is worth noting that the information collected in this application is information and data authorized by the user or fully authorized by all parties, and the collection, storage, use, processing, transmission, provision, disclosure and application of the relevant data all comply with the relevant laws, regulations and standards of the relevant countries and regions, necessary confidentiality measures have been taken, and they do not violate public order and good morals. Corresponding operation portals are provided for users to choose to authorize or refuse.

[0188] It is worth noting that the technical solution provided in this application provides users with a corresponding operation entry point, allowing users to choose to agree to or reject the automated decision-making result; if the user chooses to reject, the process will proceed to the expert decision-making process.

[0189] The technical solution of the method for generating synchronous condenser configuration schemes for new energy bases provided in this invention involves: obtaining configuration parameters of the new energy base; determining the simultaneity rate planning boundary conditions of the new energy base based on the configuration parameters using a preset short-circuit ratio calculation program for multiple new energy bases and a power system transient stability simulation program; generating multiple candidate synchronous condenser configuration schemes based on the simultaneity rate planning boundary conditions and the configuration parameters of the new energy base; performing simulation index testing on the multiple candidate synchronous condenser configuration schemes using the short-circuit ratio calculation program for multiple new energy bases and the power system transient stability simulation program to generate a comprehensive evaluation index set corresponding to each candidate synchronous condenser configuration scheme; and generating a target synchronous condenser configuration scheme based on a pre-constructed multi-objective prediction model and the comprehensive evaluation index set corresponding to each candidate synchronous condenser configuration scheme. This comprehensive evaluation considers power system safety and stability margin, short-circuit capacity support capability, inertia support capability, new energy absorption level, and profitability, ensuring the safety, stability, and sustainability of the finally selected target synchronous condenser configuration scheme, thereby rationally planning resource allocation and improving utilization.

[0190] Figure 3 This is a schematic diagram of a device for generating a synchronous condenser configuration scheme for a new energy base, provided in an embodiment of the present invention. This device is used to execute the aforementioned method for generating a synchronous condenser configuration scheme for a new energy base. Figure 3As shown, the device includes: a parameter acquisition unit 11, a boundary condition determination unit 12, an alternative scheme generation unit 13, a simulation index detection unit 14, and a target scheme generation unit 15.

[0191] The parameter acquisition unit 11 is used to acquire the configuration parameters of the new energy base.

[0192] The boundary condition determination unit 12 is used to determine the simultaneous rate planning boundary conditions of the new energy base based on the configuration parameters of the new energy base by using the preset new energy multi-station short-circuit ratio calculation program and power system transient stability simulation program.

[0193] The alternative scheme generation unit 13 is used to generate multiple alternative synchronous condenser configuration schemes based on the simultaneity rate planning boundary conditions and the configuration parameters of the new energy base.

[0194] The simulation index detection unit 14 is used to perform simulation index detection on multiple alternative synchronous condenser configuration schemes through the new energy multi-station short-circuit ratio calculation program and the power system transient stability simulation program, and generate a set of comprehensive evaluation indexes corresponding to each alternative synchronous condenser configuration scheme.

[0195] The target scheme generation unit 15 is used to generate a target synchronous condenser configuration scheme based on the comprehensive evaluation index set corresponding to each alternative synchronous condenser configuration scheme through a pre-built multi-objective prediction model.

[0196] In this embodiment of the invention, the boundary condition determination unit 12 is specifically used to verify, through a continuous method and based on the initialized simultaneity rate of the new energy base, whether the short-circuit ratio and transient voltage peak value of the multiple new energy power plants under the configuration parameters of the new energy base reach the preset critical conditions using a preset new energy multi-station short-circuit ratio calculation program and a power system transient stability simulation program; if so, the current simultaneity rate of the new energy base is determined as the simultaneity rate of other new energy power plants; the preset target simultaneity rate is determined as the target new energy power plant simultaneity rate, and the simultaneity rate planning boundary conditions of the new energy base are determined based on the target new energy power plant simultaneity rate and the simultaneity rates of other new energy power plants.

[0197] In this embodiment of the invention, the alternative scheme generation unit 13 is specifically used to generate multiple target simultaneity rates for new energy bases based on the simultaneity rate planning boundary conditions; to construct mathematical models for optimizing the configuration of synchronous condensers based on the configuration parameters of the new energy bases under multiple target simultaneity rates; and to solve each mathematical model for optimizing the configuration of synchronous condensers to generate multiple alternative synchronous condenser configuration schemes.

[0198] In this embodiment of the invention, the comprehensive evaluation index set includes system safety and stability margin index, short-circuit capacity support capability index, inertia support capability index, new energy absorption level index, and profitability index; the simulation index detection unit 14 is specifically used to perform simulation calculations on multiple alternative synchronous condenser configuration schemes through a power system transient stability simulation program, and generate transient overvoltage margin index and transient power angle stability margin index corresponding to each alternative synchronous condenser configuration scheme; based on the transient overvoltage margin index and transient power angle stability margin index, the system safety and stability margin index is generated;

[0199] Using a multi-site short-circuit ratio calculation program for new energy, simulation calculations are performed on multiple alternative synchronous condenser configuration schemes to generate the short-circuit capacity increment, short-circuit ratio increment, and short-circuit current increment corresponding to each alternative synchronous condenser configuration scheme; based on the short-circuit capacity increment, short-circuit ratio increment, and short-circuit current increment, short-circuit capacity support capability indicators are generated.

[0200] Using a power system transient stability simulation program, simulation calculations are performed on multiple alternative synchronous condenser (SCC) configuration schemes to generate the system inertia constant increment, minimum frequency increment, frequency change rate increment, and frequency recovery time increment for each alternative SCC configuration scheme. Based on the system inertia constant increment, minimum frequency increment, frequency change rate increment, and frequency recovery time increment, an inertia support capability index is generated.

[0201] Using a power system transient stability simulation program, simulation calculations are performed on multiple alternative synchronous condenser (SCDC) configuration schemes to generate the transmission limit, annual utilization hours, reduction in restricted renewable energy generation, increase in renewable energy absorption rate, and reduction in curtailment rate for each alternative SCDC configuration scheme. Based on the transmission limit, annual utilization hours, reduction in restricted renewable energy generation, increase in renewable energy absorption rate, and reduction in curtailment rate, renewable energy absorption level indicators are generated.

[0202] Based on the power prediction curves corresponding to multiple alternative synchronous condenser configuration schemes, a profitability index is generated for each alternative synchronous condenser configuration scheme.

[0203] In this embodiment of the invention, the target scheme generation unit 15 is specifically used to predict the importance of the comprehensive evaluation index set corresponding to each candidate synchronous condenser configuration scheme through a multi-objective prediction model, and generate the importance index corresponding to the candidate synchronous condenser configuration scheme.

[0204] The importance indicators are ranked, and the alternative synchronous condenser configuration schemes corresponding to the specified importance indicators are determined as the target synchronous condenser configuration schemes.

[0205] In this embodiment of the invention, the device further includes a dataset construction unit 16 and a model training unit 17.

[0206] Dataset building unit 16 is used to build a multi-objective indicator dataset, which includes multiple sets of training indicators and importance labels corresponding to each set of training indicators.

[0207] The model training unit 17 is used to train a multi-objective prediction model by using a machine learning model to train multiple sets of training indicators and the importance labels corresponding to each set of training indicators.

[0208] In this embodiment of the invention, configuration parameters of the new energy base are obtained; using a pre-set short-circuit ratio calculation program for multiple new energy power plants and a power system transient stability simulation program, the simultaneity rate planning boundary conditions of the new energy base are determined based on the configuration parameters; based on the simultaneity rate planning boundary conditions and the configuration parameters of the new energy base, multiple alternative synchronous condenser (SCDC) configuration schemes are generated; using the short-circuit ratio calculation program for multiple new energy power plants and the power system transient stability simulation program, simulation index testing is performed on the multiple alternative SCDC configuration schemes to generate a comprehensive evaluation index set corresponding to each alternative SCDC configuration scheme; using a pre-constructed multi-objective prediction model, a target SCDC configuration scheme is generated based on the comprehensive evaluation index set corresponding to each alternative SCDC configuration scheme. This scheme is comprehensively evaluated from the aspects of power system safety and stability margin, short-circuit capacity support capability, inertia support capability, new energy absorption level, and profitability, ensuring the safety, stability, and sustainability of the finally selected target SCDC configuration scheme, thereby rationally planning resource allocation and improving utilization.

[0209] The systems, devices, modules, or units described in the above embodiments can be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer device, specifically, a computer device can be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smartphone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or any combination of these devices.

[0210] This invention provides a computer device, including a memory and a processor. The memory is used to store information including program instructions, and the processor is used to control the execution of the program instructions. When the program instructions are loaded and executed by the processor, they implement the steps of the above-described embodiment of the method for generating a synchronous condenser configuration scheme for a new energy base. For a detailed description, please refer to the above-described embodiment of the method for generating a synchronous condenser configuration scheme for a new energy base.

[0211] The following is for reference. Figure 4 It shows a schematic diagram of the structure of a computer device 600 suitable for implementing the embodiments of this application.

[0212] like Figure 4As shown, the computer device 600 includes a central processing unit (CPU) 601, which can perform various appropriate tasks and processes based on programs stored in read-only memory (ROM) 602 or programs loaded from storage section 608 into random access memory (RAM) 603. The RAM 603 also stores various programs and data required for the operation of the computer device 600. The CPU 601, ROM 602, and RAM 603 are interconnected via a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.

[0213] The following components are connected to I / O interface 605: an input section 606 including a keyboard, mouse, etc.; an output section 607 including a cathode ray tube (CRT), liquid crystal feedback (LCD), etc., and speakers, etc.; a storage section 608 including a hard disk, etc.; and a communication section 609 including a network interface card such as a LAN card, modem, etc. The communication section 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to I / O interface 605 as needed. A removable medium 611, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., is installed on drive 610 as needed so that computer programs read from it can be installed in storage section 608 as needed.

[0214] In particular, according to embodiments of the present invention, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of the present invention include a computer program product comprising a computer program tangibly embodied on a machine-readable medium, the computer program including program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 609, and / or installed from removable medium 611.

[0215] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0216] For ease of description, the above devices are described separately by function as various units. Of course, in implementing this application, the functions of each unit can be implemented in one or more software and / or hardware.

[0217] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0218] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0219] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0220] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0221] The acquisition, storage, use, and processing of data in this application all comply with the relevant provisions of national laws and regulations.

[0222] It should be noted that in the embodiments of this application, certain software, components, models and other existing solutions in the industry may be mentioned. These should be regarded as exemplary and are only intended to illustrate the feasibility of implementing the technical solution of this application. However, it does not mean that the applicant has used or necessarily used the solution.

[0223] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0224] This application can be described in the general context of computer-executable instructions, such as program modules, that are executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc., that perform a specific task or implement a specific abstract data type. This application can also be practiced in distributed computing environments where tasks are performed by remote processing devices connected via a communication network. In distributed computing environments, program modules can reside in local and remote computer storage media, including storage devices.

[0225] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0226] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A method for generating a synchronous condenser configuration scheme for a new energy base, characterized in that, The method includes: Obtain the configuration parameters of the new energy base; By using a pre-set short-circuit ratio calculation program for multiple new energy power plants and a power system transient stability simulation program, the boundary conditions for simultaneous rate planning of the new energy base are determined based on the configuration parameters of the new energy base. Based on the simultaneous rate planning boundary conditions and the configuration parameters of the new energy base, multiple alternative synchronous condenser configuration schemes are generated. Using the aforementioned new energy multi-station short-circuit ratio calculation program and power system transient stability simulation program, simulation index detection is performed on multiple alternative synchronous condenser configuration schemes to generate a comprehensive evaluation index set corresponding to each alternative synchronous condenser configuration scheme. By using a pre-built multi-objective prediction model, a target synchronous condenser configuration scheme is generated based on the comprehensive evaluation index set corresponding to each alternative synchronous condenser configuration scheme.

2. The method for generating a synchronous condenser configuration scheme for a new energy base according to claim 1, characterized in that, The process involves using a pre-defined short-circuit ratio calculation program for multiple new energy power plants and a power system transient stability simulation program to determine the simultaneity rate planning boundary conditions for the new energy base based on its configuration parameters. These conditions include: Using a continuous method, based on the initial simultaneity rate of the new energy base, and through a preset calculation program for the short-circuit ratio of multiple new energy substations and a power system transient stability simulation program, we verify whether the short-circuit ratio and transient voltage peak value of multiple new energy substations under the configuration parameters of the new energy base reach the preset critical conditions. If so, the current simulcast rate of new energy bases will be used as the simulcast rate of other new energy power stations; The preset target simultaneity rate is defined as the target simultaneity rate of new energy power stations. Based on the target simultaneity rate of new energy power stations and the simultaneity rates of other new energy power stations, the simultaneity rate planning boundary conditions of the new energy base are determined.

3. The method for generating a synchronous condenser configuration scheme for a new energy base according to claim 1, characterized in that, The process generates multiple alternative synchronous condenser configuration schemes based on the simultaneity rate planning boundary conditions and the configuration parameters of the new energy base, including: Based on the planning boundary conditions of the simultaneity rate, generate the target simultaneity rates for multiple new energy bases; Based on the configuration parameters of the new energy base under multiple simultaneous targets, mathematical models for optimizing the configuration of synchronous condensers are constructed respectively. Solve the mathematical model for optimizing the configuration of each synchronous condenser to generate multiple alternative synchronous condenser configuration schemes.

4. The method for generating a synchronous condenser configuration scheme for a new energy base according to claim 1, characterized in that, The comprehensive evaluation index set includes system safety and stability margin index, short-circuit capacity support capability index, inertia support capability index, new energy consumption level index, and profitability index; The method involves using the short-circuit ratio calculation program for multiple new energy power plants and the transient stability simulation program for the power system to perform simulation index testing on multiple alternative synchronous condenser (SCDC) configuration schemes, generating a comprehensive evaluation index set for each alternative SCDC configuration scheme, including: The power system transient stability simulation program is used to perform simulation calculations on multiple alternative synchronous condenser configuration schemes, generating transient overvoltage margin and transient power angle stability margin for each alternative synchronous condenser configuration scheme. Based on the transient overvoltage margin index and the transient power angle stability margin index, a system safety and stability margin index is generated. The short-circuit ratio calculation program for multiple new energy power stations is used to simulate and calculate multiple alternative synchronous condenser configuration schemes, generating the short-circuit capacity increment, short-circuit ratio increment, and short-circuit current increment for each alternative synchronous condenser configuration scheme. Based on the short-circuit capacity increment, short-circuit ratio increment, and short-circuit current increment, a short-circuit capacity support capability index is generated. The power system transient stability simulation program is used to perform simulation calculations on multiple alternative synchronous condenser configuration schemes, generating the system inertia constant increment, minimum frequency increment, frequency change rate increment, and frequency recovery time increment corresponding to each alternative synchronous condenser configuration scheme. Based on the system inertia constant increment, minimum frequency increment, frequency change rate increment, and frequency recovery time increment, an inertia support capability index is generated. The power system transient stability simulation program is used to perform simulation calculations on multiple alternative synchronous condenser configuration schemes, and generate the corresponding power transmission limit, annual utilization hours, reduction in restricted renewable energy power generation, increase in renewable energy absorption rate and reduction in curtailment rate for each alternative synchronous condenser configuration scheme. Based on the aforementioned transmission limit, annual utilization hours, reduction in restricted renewable energy generation, increase in renewable energy consumption rate, and reduction in curtailment rate, a renewable energy consumption level index is generated. Based on the power prediction curves corresponding to multiple alternative synchronous condenser configuration schemes, a profitability index is generated for each alternative synchronous condenser configuration scheme.

5. The method for generating a synchronous condenser configuration scheme for a new energy base according to claim 1, characterized in that, The process of generating a target synchronous condenser configuration scheme by using a pre-built multi-objective prediction model based on a set of comprehensive evaluation indicators corresponding to each candidate synchronous condenser configuration scheme includes: The multi-objective prediction model is used to predict the importance of the comprehensive evaluation index set corresponding to each alternative synchronous condenser configuration scheme, and to generate the importance index corresponding to the alternative synchronous condenser configuration scheme. The importance indicators are sorted, and the alternative synchronous condenser configuration schemes corresponding to the specified importance indicators are determined as the target synchronous condenser configuration schemes.

6. The method for generating a synchronous condenser configuration scheme for a new energy base according to claim 1, characterized in that, The method further includes: Construct a multi-objective indicator dataset, which includes multiple sets of training indicators and importance labels corresponding to each set of training indicators; The multi-objective prediction model is constructed by training multiple sets of training indicators and the importance labels corresponding to each set of training indicators using a machine learning model.

7. A device for generating a synchronous condenser configuration scheme for a new energy base, characterized in that, The device includes: The parameter acquisition unit is used to acquire the configuration parameters of the new energy base; The boundary condition determination unit is used to determine the simultaneous rate planning boundary conditions of the new energy base based on the configuration parameters of the new energy base by using a preset new energy multi-station short-circuit ratio calculation program and power system transient stability simulation program. The alternative scheme generation unit is used to generate multiple alternative synchronous condenser configuration schemes based on the simultaneity rate planning boundary conditions and the configuration parameters of the new energy base. The simulation index detection unit is used to perform simulation index detection on multiple alternative synchronous condenser configuration schemes through the new energy multi-station short-circuit ratio calculation program and the power system transient stability simulation program, and generate a set of comprehensive evaluation indexes corresponding to each alternative synchronous condenser configuration scheme. The target scheme generation unit is used to generate a target synchronous condenser configuration scheme based on the comprehensive evaluation index set corresponding to each alternative synchronous condenser configuration scheme through a pre-built multi-objective prediction model.

8. A computer-readable medium having a computer program stored thereon, characterized in that, When executed by a processor, the program implements the method for generating a synchronous condenser configuration scheme for a new energy base as described in any one of claims 1 to 6.

9. A computer device comprising a memory and a processor, the memory for storing information including program instructions, and the processor for controlling the execution of the program instructions, characterized in that, When the program instructions are loaded and executed by the processor, the method for generating a synchronous condenser configuration scheme for a new energy base as described in any one of claims 1 to 6 is implemented.

10. A computer program product comprising a computer program / instructions, characterized in that, When the computer program / instructions are executed by the processor, they implement the method for generating a synchronous condenser configuration scheme for a new energy base as described in any one of claims 1 to 6.

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