Electrical field simulation method, device, equipment, medium and product of double-break circuit breaker

Abstract

The application relates to an electric field simulation method, device, equipment, medium and product of a double-break circuit breaker. The method comprises the following steps: obtaining a design parameter combination of a double-break circuit breaker to be simulated according to a preset target function; the design parameter combination comprises structure parameters, medium parameters and working condition parameters of the double-break circuit breaker; configuring a parameterized simulation model of the double-break circuit breaker according to the design parameter combination; performing electric field simulation on the parameterized simulation model to obtain an electric field simulation result of the double-break circuit breaker; returning to the step of obtaining the design parameter combination of the double-break circuit breaker to be simulated according to the preset target function until the electric field simulation result meets a convergence condition of the target function. The method can improve the design efficiency and design precision of the double-break circuit breaker.

Description

Technical Field

[0001] This application relates to the field of power equipment design technology, and in particular to an electric field simulation method, apparatus, computer equipment, computer-readable storage medium and computer program product for a double-break circuit breaker. Background Technology

[0002] A double-break circuit breaker is a high-voltage protection device that integrates two series disconnect points within a single switching unit. When the circuit is tripped, it can disconnect the circuit at two physical locations simultaneously, making it particularly suitable for high-voltage power grid scenarios.

[0003] The structural design of a double-break circuit breaker needs to consider the influence of various factors. After setting the corresponding design scheme, the design is then verified by electric field simulation in terms of performance, reliability and other aspects.

[0004] In related technologies, electric field simulation is carried out by manually setting and adjusting the design parameters of double-break circuit breakers, and only a fixed parameter simulation mode is used. The design parameters obtained in this way are difficult to take into account the electric field uniformity and voltage division rationality of double-break circuit breakers. Furthermore, due to the cumbersome parameter adjustment and the need for repeated modeling and subdivision, the modeling efficiency is low. Summary of the Invention

[0005] Therefore, it is necessary to provide a method, apparatus, computer equipment, computer-readable storage medium, and computer program product for simulating the electric field of a double-break circuit breaker, which can improve the design efficiency and accuracy of the double-break circuit breaker, in order to address the above-mentioned technical problems.

[0006] Firstly, this application provides an electric field simulation method for a double-break circuit breaker, including:

[0007] According to the preset objective function, the design parameter combination of the double-break circuit breaker to be simulated is obtained; the design parameter combination includes the structural parameters, medium parameters and operating condition parameters of the double-break circuit breaker;

[0008] Based on the design parameter combination, a parametric simulation model of the double-break circuit breaker is configured; wherein, the parametric simulation model includes at least a parametric geometric model and a parametric mesh model; the parametric geometric model and the parametric mesh model are configured according to the structural parameters; the simulation boundary conditions associated with the parametric simulation model are configured according to the medium parameters and / or the operating condition parameters;

[0009] Electric field simulation was performed on the parameterized simulation model to obtain the electric field simulation results of the double-break circuit breaker;

[0010] Return to the step of obtaining the design parameter combination of the double-break circuit breaker to be simulated according to the preset objective function, until the electric field simulation result meets the convergence condition of the objective function.

[0011] In one embodiment, obtaining the design parameter combination of the dual-break circuit breaker to be simulated according to a preset objective function includes:

[0012] Minimizing the maximum electric field intensity inside the double-break circuit breaker, and ensuring that the voltage division ratio of the two breaks of the double-break circuit breaker is equal to the opening distance ratio, are used as the optimization objectives of the objective function associated with the preset multi-objective parameter optimization algorithm.

[0013] The design parameter combination is obtained according to the objective function and the multi-objective parameter optimization algorithm.

[0014] In one embodiment, obtaining the simulation parameter combination according to the objective function using the multi-objective parameter optimization algorithm includes:

[0015] The simulation parameter combination is obtained through the multi-objective parameter optimization algorithm according to the objective function and preset constraints.

[0016] The preset constraints include that the maximum electric field strength inside the double-break circuit breaker is less than or equal to the preset dielectric breakdown electric field strength, and that the structural parameters, dielectric parameters, and operating condition parameters are within the corresponding preset value ranges.

[0017] In one embodiment, configuring the parameterized simulation model of the double-break circuit breaker according to the design parameter combination includes:

[0018] Configure the structural parameters as the geometric parameters of the parameterized geometric model;

[0019] The mesh density values ​​of each model region of the parameterized geometric model are determined based on the structural parameters.

[0020] Each of the aforementioned mesh density values ​​is configured as the corresponding mesh density parameter of the parameterized mesh model.

[0021] In one embodiment, the method further includes:

[0022] If the electric field simulation results meet the convergence conditions, obtain the test data of the double-break circuit breaker associated with the design parameter combination;

[0023] By comparing the design parameter combination with the experimental data, a data comparison result is obtained; the data comparison result is used to characterize whether the design parameter combination is reasonable.

[0024] If the data comparison results indicate that the design parameter combination is reasonable, the design parameter combination is used as the target design parameter combination for the double-break circuit breaker and output.

[0025] In one embodiment, the structural parameters include at least one of the double-break gap distance, contact fillet radius, and equalizing capacitor mounting angle; the dielectric parameters include the relative permittivity and / or conductivity of the arc-extinguishing medium; and the operating parameters include at least one of the applied voltage amplitude, voltage frequency, and breaking speed.

[0026] Secondly, this application also provides an electric field simulation device for a double-break circuit breaker, comprising:

[0027] The acquisition module is used to acquire the design parameter combination of the double-break circuit breaker to be simulated according to a preset objective function; the design parameter combination includes the structural parameters, medium parameters and operating condition parameters of the double-break circuit breaker;

[0028] A configuration module is used to configure a parametric simulation model of the double-break circuit breaker according to the design parameter combination; wherein the parametric simulation model includes at least a parametric geometric model and a parametric mesh model; the parametric geometric model and the parametric mesh model are configured according to the structural parameters; the simulation boundary conditions associated with the parametric simulation model are configured according to the medium parameters and / or the operating condition parameters;

[0029] The simulation module is used to perform electric field simulation on the parameterized simulation model to obtain the electric field simulation results of the double-break circuit breaker.

[0030] The iteration module is used to return to the step of obtaining the design parameter combination of the double-break circuit breaker to be simulated according to the preset objective function, until the electric field simulation result meets the convergence condition of the objective function.

[0031] Thirdly, this application also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the above-mentioned electric field simulation method for a double-break circuit breaker.

[0032] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-described electric field simulation method for a double-break circuit breaker.

[0033] Fifthly, this application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described electric field simulation method for a double-break circuit breaker.

[0034] The aforementioned electric field simulation method, apparatus, computer equipment, computer-readable storage medium, and computer program product for double-break circuit breakers configure a parametric simulation model of the double-break circuit breaker by combining design parameters obtained according to the objective function. This allows the geometric and mesh models of the double-break circuit breaker to be automatically updated and modeled based on structural parameters, eliminating the need for manual adjustment of the geometric model and re-division of the 3D mesh. Simulation boundary conditions are also adjusted synchronously according to medium parameters and / or operating condition parameters, significantly improving simulation efficiency and shortening the design cycle of the double-break circuit breaker. Furthermore, by performing multi-parameter coupled electric field simulation and iterative optimization through structural parameters, medium parameters, and operating condition parameters, precise optimization of design parameters is achieved. This allows the design parameter combination that meets the convergence condition of the objective function to balance electric field uniformity and voltage division rationality, overcoming the limitations of single-parameter optimization in related technologies and improving the accuracy of double-break circuit breaker design optimization. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the application environment provided for an embodiment of this application.

[0037] Figure 2 A flowchart illustrating the steps of an electric field simulation method for a double-break circuit breaker provided in an embodiment of this application.

[0038] Figure 3 This is a schematic diagram illustrating the relationship between structural parameters and circuit breaker structure, provided as an embodiment of this application.

[0039] Figure 4 This is a flowchart of a multi-parameter coupled optimization iteration and electric field simulation provided in an embodiment of this application.

[0040] Figure 5 This is a schematic diagram of the geometric model of a double-break circuit breaker with seven different capacitor installation angles provided in one embodiment of this application.

[0041] Figure 6 A schematic diagram of the voltage unevenness coefficient corresponding to the above-mentioned double-break circuit breaker provided in an embodiment of this application.

[0042] Figure 7 This is a structural block diagram of an electric field simulation device for a double-break circuit breaker provided in an embodiment of this application.

[0043] Figure 8 This is a schematic diagram of the structure of a computer device provided in an embodiment of this application. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0045] It should be noted that the terms "first," "second," etc., used in this application can be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from the second element. The terms "comprising" and "having," and any variations thereof, used in this application, are intended to cover non-exclusive inclusion. The term "multiple" used in this application refers to two or more. The term "and / or" used in this application refers to one of the embodiments, or any combination of multiple embodiments.

[0046] The structural design of high-voltage double-break circuit breakers needs to consider the influence of multiple parameters, including the double-break gap distance, contact structure dimensions, shielding dimensions, and dielectric parameters. Even small changes in these parameters can lead to significant changes in the internal electric field distribution. During the circuit breaker design optimization process, multiple electric field simulations are required for different parameter combinations to determine the optimal parameter combination, thereby improving the insulation performance and operational reliability of the equipment.

[0047] In related technologies, electric field simulation of high-voltage double-break circuit breakers often adopts a fixed parameter simulation mode. That is, each simulation only calculates a fixed set of structural or dielectric parameters. When parameters need to be adjusted, the geometric model must be rebuilt, the mesh must be divided, and boundary conditions must be set. The whole process is cumbersome and time-consuming, and the simulation efficiency is extremely low. At the same time, in traditional simulation, model building and parameter adjustment are independent of each other. No correlation model between parameters and electric field distribution is established, making it impossible to quickly analyze the influence of parameter changes on electric field distribution and making it difficult to achieve rapid parameter optimization.

[0048] Furthermore, the parametric simulation methods of related technologies mostly optimize single parameters without considering the coupling effect of multiple parameters, and do not design parametric models for the voltage division characteristics of double-break structures. As a result, the optimized parameter combination cannot take into account both the electric field uniformity and voltage division rationality of double breaks. At the same time, the simulation relies on manual parameter adjustment and lacks an automated parameter iteration and optimization mechanism, which makes it impossible to achieve accurate parameter optimization. Moreover, parameter modification during the simulation process is prone to errors, further reducing the efficiency of design optimization and failing to meet the needs of rapid design and batch optimization of high-voltage level double-break circuit breakers.

[0049] In related technologies, there are many problems such as low model building efficiency and poor parameter correlation. In particular, for complex double-break structures, it is difficult to achieve fully automated simulation and optimization through simple parametric programming.

[0050] The electric field simulation method for double-break circuit breakers provided in this application embodiment can be applied to, for example... Figure 1 In the application environment shown, terminal 102 communicates with server 104 via a network. A data storage system can store the data that server 104 needs to process. The data storage system can be integrated onto server 104, or it can be located in the cloud or on another network server. Terminal 102 sends a request to server 104 for electric field simulation of a double-break circuit breaker. Server 104 responds to the request by obtaining the design parameter combination of the double-break circuit breaker to be simulated according to a preset objective function. The design parameter combination includes the structural parameters, dielectric parameters, and operating condition parameters of the double-break circuit breaker. Based on the design parameter combination, a parametric simulation model of the double-break circuit breaker is configured. This parametric simulation model includes at least a parametric geometric model and a parametric mesh model, configured according to the structural parameters. The simulation boundary conditions associated with the parametric simulation model are configured according to the dielectric parameters and / or operating condition parameters. Electric field simulation is performed on the parametric simulation model to obtain the electric field simulation results of the double-break circuit breaker. The process of obtaining the design parameter combination of the double-break circuit breaker according to the preset objective function is repeated until the electric field simulation results meet the convergence conditions of the objective function. Server 104 returns the electric field simulation results that meet the convergence conditions of the objective function, along with the design parameter combination, to terminal 102. Terminal 102 can be, but is not limited to, various personal computers, laptops, smartphones, tablets, drones, low-altitude aircraft, IoT devices, and portable wearable devices. IoT devices can include smart speakers, smart TVs, smart air conditioners, smart in-vehicle devices, and projection equipment. Portable wearable devices can include smartwatches, smart bracelets, and head-mounted displays. Head-mounted displays can be virtual reality (VR) devices, augmented reality (AR) devices, and smart glasses. Server 104 can be a standalone physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing cloud computing services.

[0051] In one exemplary embodiment, such as Figure 2 As shown, an electric field simulation method for a double-break circuit breaker is provided, and this method is applied to... Figure 1 Taking server 104 as an example, the explanation includes the following steps 202 to 208. Wherein:

[0052] Step 202: According to the preset objective function, obtain the design parameter combination of the double-break circuit breaker to be simulated; the design parameter combination includes the structural parameters, dielectric parameters and operating condition parameters of the double-break circuit breaker;

[0053] In some embodiments, the structural parameters include at least one of the double-break gap distance, contact fillet radius, and equalizing capacitor mounting angle; the dielectric parameters include the relative permittivity and / or conductivity of the arc-extinguishing medium; and the operating parameters include at least one of the applied voltage amplitude, voltage frequency, and breaking speed.

[0054] The structural parameters may include the double-break gap spacing (d1, d2), contact fillet radius (r), equalizing capacitor mounting angle (α), distance between the equalizing capacitor and the main shaft (d), and shield diameter (Dp). In practical applications, the voltage division requirement of the double-break series structure can also be considered, and the main-auxiliary gap spacing ratio can be included in the structural parameters.

[0055] The medium parameters may include the relative permittivity (εr) and conductivity (σ) of the arc-quenching medium (sulfur hexafluoride or vacuum), among which the parameters of sulfur hexafluoride are related to pressure and temperature.

[0056] The operating parameters may include the applied voltage amplitude (U), voltage frequency (f), and switching speed (v).

[0057] In practical implementation, the objective function can be optimized for multiple electric field indicators (such as electric field uniformity, maximum field strength limit, insulation margin, etc.). Guided by the objective function, the optimization is iteratively performed within the parameter value range through a preset algorithm (such as genetic algorithm) to generate and obtain the corresponding design parameter combination.

[0058] In some embodiments, obtaining the design parameter combination of the dual-break circuit breaker to be simulated according to a preset objective function includes:

[0059] Minimizing the maximum electric field intensity inside the double-break circuit breaker, and ensuring that the voltage division ratio of the two breaks of the double-break circuit breaker is equal to the opening distance ratio, are used as the optimization objectives of the objective function associated with the preset multi-objective parameter optimization algorithm.

[0060] The design parameter combination is obtained according to the objective function and the multi-objective parameter optimization algorithm.

[0061] In practical implementation, minimizing the maximum electric field strength inside the double-break circuit breaker can reduce local field concentration, thereby reducing phenomena such as dielectric breakdown, corona discharge, or insulation aging caused by excessive field strength. This improves the insulation reliability and operational safety of the circuit breaker under high-voltage conditions and extends the service life of the equipment. Making the voltage division ratio of the two breaks of the double-break circuit breaker equal to the opening distance ratio, that is, making the voltage division ratio and opening distance ratio tend to be consistent, can ensure a balanced electric field distribution between the two breaks and synchronous sharing of the breaking task, preventing a single break from being subjected to excessively high voltage and breaking down prematurely, thereby improving the overall breaking performance and insulation coordination effect of the double-break circuit breaker.

[0062] Specific multi-objective parameter optimization algorithms can include NSGA-II (non-dominated sorting genetic algorithm with elitist strategy), MOPSO (multi-objective particle swarm optimization algorithm), SPEA2 (intensity Pareto evolutionary algorithm), etc.

[0063] In some examples, minimizing the maximum electric field strength inside the double-break circuit breaker and making the voltage division ratio of the double-break circuit breaker equal to the opening distance ratio are used as the optimization objectives of the objective function associated with the preset NSGA-II multi-objective parameter optimization algorithm. The algorithm iteratively optimizes, cross-mutates, and sorts non-dominated combinations of variables, and successively selects the Pareto optimal solution that simultaneously satisfies the conditions of lower maximum electric field strength and voltage division ratio and opening distance ratio tending to be consistent. Finally, one or more sets of design parameter combinations for double-break circuit breakers (i.e., locally optimal design parameter combinations) are obtained. Each set of design parameter combinations includes specific values ​​of structural parameters, dielectric parameters, and operating condition parameters.

[0064] In practical applications, the model order can be reduced by using GA-BP (a combination of genetic algorithm (GA) and back propagation) neural network to improve iteration efficiency, and then the design parameter combination of the double-break circuit breaker can be obtained by using a multi-objective parameter optimization algorithm.

[0065] It can also be used for sensitivity analysis of a single parameter, fixing other parameters and adjusting only the target parameter. Through parametric simulation, the influence of the parameter on the electric field distribution can be quickly obtained, the optimal value range of the parameter can be determined, and a basis for multi-parameter coupling optimization can be provided.

[0066] In this embodiment, by minimizing the maximum electric field strength inside the double-break circuit breaker and making the voltage division ratio of the double breaks equal to the opening distance ratio as the objective function of the multi-objective parameter optimization algorithm, both insulation safety and voltage balance of the breaks can be taken into account. According to the objective function, the multi-objective parameter optimization algorithm obtains the design parameter combination, and can automatically iteratively select the optimal design parameter scheme that takes into account both uniform electric field distribution and voltage division matching of the breaks, avoiding the problems of excessively high local field strength and uneven voltage distribution of the breaks, and effectively improving the insulation reliability and breaking performance of the circuit breaker.

[0067] In some embodiments, obtaining the simulation parameter combination according to the objective function using the multi-objective parameter optimization algorithm includes:

[0068] The simulation parameter combination is obtained through the multi-objective parameter optimization algorithm according to the objective function and preset constraints.

[0069] The preset constraints include that the maximum electric field strength inside the double-break circuit breaker is less than or equal to the preset dielectric breakdown electric field strength, and that the structural parameters, dielectric parameters, and operating condition parameters are within the corresponding preset value ranges.

[0070] Among them, the constraint condition refers to the mandatory constraint added to the design parameter combination of the dual-break circuit breaker obtained by the multi-objective parameter optimization algorithm, which can improve the rationality of the design parameter combination, such as not violating physical rules.

[0071] Among them, the dielectric breakdown electric field strength refers to the critical electric field strength value when the insulating medium in a double-break circuit breaker is just broken down by the electric field and loses its insulating function.

[0072] In the specific implementation, minimizing the maximum electric field intensity inside the double-break circuit breaker and ensuring that the voltage division ratio of the two breaks equals the opening distance ratio are taken as the optimization objectives of the objective function. Corresponding preset constraints are set, including that the maximum electric field intensity inside the double-break circuit breaker is not greater than that corresponding to sulfur hexafluoride or vacuum, the preset breakdown electric field intensity, and that structural parameters such as the break distance and equalizing capacitor, medium parameters such as gas pressure, and operating condition parameters such as operating voltage are all within their respective preset value ranges. According to the above objective function and preset constraints, the preset NSGA-II multi-objective parameter optimization algorithm is used for iterative optimization and feasible region screening, and finally a design parameter combination that meets the insulation safety requirements and has reasonable parameter values ​​is obtained.

[0073] In this embodiment, by combining the optimization objective with preset constraints to optimize multi-objective parameters, it is possible to ensure that the double-break circuit breaker achieves the design objectives of minimizing electric field strength and balancing voltage distribution at the breaks, while also ensuring that the maximum internal electric field strength does not exceed the dielectric breakdown electric field strength, thus avoiding the risk of dielectric breakdown failure. At the same time, all parameters are kept within a reasonable range, ensuring the feasibility of all parameters of the double-break circuit breaker.

[0074] Step 204: Configure the parametric simulation model of the double-break circuit breaker according to the design parameter combination;

[0075] The parametric simulation model includes at least a parametric geometric model and a parametric mesh model; the parametric geometric model and the parametric mesh model are configured according to the structural parameters; the simulation boundary conditions associated with the parametric simulation model are configured according to the medium parameters and / or the operating condition parameters.

[0076] In this context, a parametric simulation model refers to a variable simulation model that abstracts the structural parameters, dielectric parameters, and operating condition parameters in the design of a double-break circuit breaker into dynamically updatable variable parameters. The parametric simulation model includes the definition of a parametric geometric model, a parametric mesh model, and simulation boundary conditions.

[0077] In practical implementation, the parametric geometric model and parametric mesh model can be obtained by geometric simulation software (such as CREO), and the simulation boundary conditions of the electric field simulation can be obtained by physical field simulation software (such as COMSOL). By linking the geometric simulation software and the physical field simulation software through relevant interfaces, the parametric simulation model of the double-break circuit breaker can be pre-built.

[0078] The parametric geometric model is used to simulate the geometric structure of a double-break circuit breaker. By configuring the corresponding geometric model parameters based on structural parameters, the parametric geometric model can be automatically built and updated. Specifically, the parametric geometric model can be predefined using geometric simulation software, defining structural parameters as design variables, generating associated links through a linker, and simplifying irrelevant details.

[0079] In practical applications, models can be exported using the STP format, an interface between CREO and COMSOL can be established, and the geometric model and structural parameters can be linked. When the parameter values ​​of the structural parameters are adjusted, the geometric model is automatically updated.

[0080] The parametric mesh model is used to mesh the geometry of a double-break circuit breaker to calculate relevant parameters for electric field simulation. Specifically, the parametric mesh model can be predefined using geometric simulation software, associating structural parameters with relevant mesh parameters. By configuring the corresponding mesh model parameters (such as mesh division regions and mesh density) based on the structural parameters, the parametric mesh model automatically updates, models, and generates the appropriate mesh model.

[0081] Using structural parameters, parametric simulation models and parametric mesh models can be instantiated based on the parameter values ​​of the structural parameters, dynamically generating corresponding geometric and mesh models without manually adjusting the structure of the geometric model or re-meshing.

[0082] Among them, simulation boundary conditions refer to the boundary conditions applied during the electric field simulation process in order to minimize the distortion of the simulation results.

[0083] In some examples, the relative permittivity of sulfur hexafluoride and gas pressure from the acquired dielectric parameters, as well as the rated power frequency voltage and grounding potential from the operating parameters, can be substituted into the parameterized electric field simulation model and configured as dielectric property boundary conditions and potential load boundary conditions, respectively, to complete the boundary assignment of the parameterized simulation model.

[0084] In some examples, the boundary conditions of the parametric simulation model, such as the material properties, applied voltage boundary, and temperature field boundary, can be configured based on the vacuum dielectric constant and arc-extinguishing chamber pressure in the medium parameters, as well as the lightning impulse voltage amplitude and ambient reference temperature in the operating condition parameters, thus completing the boundary assignment of the parametric simulation model.

[0085] In practical applications, COMSOL's built-in parametric command flow can be used to associate dielectric parameters, operating parameters, and boundary conditions. When dielectric parameters or operating parameters are adjusted, material properties, voltage / current, and other constraints are automatically updated, realizing the linkage between dielectric parameters, operating parameters, and electric field simulation.

[0086] In some embodiments, configuring the parametric simulation model of the double-break circuit breaker according to the design parameter combination includes:

[0087] Configure the structural parameters as the geometric parameters of the parameterized geometric model;

[0088] The mesh density values ​​of each model region of the parameterized geometric model are determined based on the structural parameters.

[0089] Each of the aforementioned mesh density values ​​is configured as the corresponding mesh density parameter of the parameterized mesh model.

[0090] In the specific implementation, the structural parameters are configured as the corresponding geometric parameters of the parametric geometric model. For example, structural parameters such as the fracture spacing, contact fillet radius, and equalizing ring outer diameter are configured as the fracture spacing parameter, contact fillet size parameter, and equalizing ring outer diameter parameter in the parametric geometric model, respectively, to complete the automatic modeling and updating of the geometric model.

[0091] Based on the magnitude of the structural parameters and the characteristics of the electric field distribution, the mesh density values ​​for each model region are determined. For example, a higher mesh density (e.g., 0.3 mm) is set for core regions with concentrated electric fields, such as contact edges and fracture gaps; a lower mesh density (e.g., 2 mm) is set for regions with gentler electric fields or transitional areas, such as insulating shells and external supports; and a medium mesh density (e.g., 1 mm) is set for dielectric regions. These mesh density values ​​are then configured as the corresponding mesh density parameters in the parametric mesh model, completing the automatic modeling and updating of the mesh model.

[0092] In this embodiment, by configuring the structural parameters as the geometric parameters of the parametric geometric model, the geometric model can be automatically updated with the parameters, eliminating the need for repeated modeling and improving modeling efficiency and consistency. The mesh density of each region is adaptively determined according to the structural parameters, realizing adaptive linkage between structure and mesh generation, eliminating the need for manual re-meshing, improving the automation and reliability of simulation model construction, and providing a stable and efficient simulation model foundation for subsequent electric field simulation.

[0093] Step 206: Perform electric field simulation on the parameterized simulation model to obtain the electric field simulation results of the double-break circuit breaker;

[0094] The electric field simulation results can include electric field indicators such as the electric field distribution in the double-fracture region, the maximum field strength, and the voltage ratio of the fracture.

[0095] In practical implementation, the simulation convergence conditions and solution step size can be set through a preset parametric solution command flow. Based on the parametric geometric model, parametric mesh model with injected structural parameter values, and configured simulation boundary conditions in the parametric simulation model, the automatic simulation solution of the parametric simulation model is performed, and the corresponding first electric field simulation results are output.

[0096] In practical applications, it can also automatically extract key indicators such as the maximum electric field strength and the double-fracture voltage ratio from the electric field simulation results, and generate correlation curves between parameters and electric field characteristics for developers to analyze.

[0097] In some embodiments, based on the constructed parametric simulation model, different design requirements (such as different voltage levels and different switching conditions) can be input to automatically generate corresponding simulation models and parameter combinations, complete batch simulations, and greatly improve design efficiency.

[0098] Step 208: Return to the step of obtaining the design parameter combination of the double-break circuit breaker to be simulated according to the preset objective function, until the electric field simulation result meets the convergence condition of the objective function.

[0099] In specific implementation, the convergence conditions of the objective function can be set as follows: the maximum electric field strength is less than or equal to a preset value (e.g., 24kV / mm), the voltage division ratio of the double-break is equal to the opening distance ratio (d1:d2=1:1), and the voltage division non-uniformity coefficient is less than the corresponding preset value (e.g., 1.03). If the electric field simulation results meet the above convergence conditions, the optimization iteration of the design parameter combination and the electric field simulation process will end. If the electric field simulation results do not meet the above convergence conditions, the electric field simulation will be performed again according to the preset objective function to obtain a new design parameter combination.

[0100] In some embodiments, the method further includes:

[0101] If the electric field simulation results meet the convergence conditions, obtain the test data of the double-break circuit breaker associated with the design parameter combination;

[0102] By comparing the design parameter combination with the experimental data, a data comparison result is obtained; the data comparison result is used to characterize whether the design parameter combination is reasonable.

[0103] If the data comparison results indicate that the design parameter combination is reasonable, the design parameter combination is used as the target design parameter combination for the double-break circuit breaker and output.

[0104] In some examples, when the electric field simulation results meet the convergence conditions, test data of double-break circuit breaker prototypes with the same or similar design parameter combinations are collected in power frequency withstand voltage, partial discharge, and break voltage division tests. The maximum field strength, voltage division ratio, and other results obtained from the simulation are compared with the measured test data item by item to obtain the data comparison results to determine whether the design parameter combination is reasonable. When the data comparison results show that the deviation between the simulation value and the test value is within the allowable range, the design parameter combination is output as the target design parameter combination for the double-break circuit breaker.

[0105] In this embodiment, by comparing and verifying the design parameter combination that meets the convergence condition with the actual experimental data, the simulation results and physical experiments can be mutually verified, effectively eliminating simulation deviations and ensuring that the design parameter combination is true and reliable. When the comparison results are reasonable, the target design parameter combination is output, which can greatly improve the accuracy and engineering applicability of the circuit breaker design scheme, and make the final design scheme of the double-break circuit breaker meet the performance and safety requirements of the actual product as much as possible.

[0106] In some embodiments, a workflow for performing electric field simulation on a double-break circuit breaker is also provided, as follows:

[0107] S1: Predefined combinations of design parameters and their corresponding value ranges. Specifically, the relationship between structural parameters, dielectric parameters, and operating condition parameters and the double-break circuit breaker is as follows: Figure 3 As shown. The structural parameters include: the main break distance d1 (50-80mm) associated with the main break, the auxiliary break distance d2 (50-80mm) associated with the auxiliary break, the contact fillet radius r (1-3mm) associated with the contact, the shield diameter Dp (80-100mm) associated with the shield, the distance between the uniform capacitor and the main shaft, and the installation angle of the uniform capacitor, etc., associated with the uniform capacitor; the dielectric parameters include: the vacuum relative permittivity εr=1 and conductivity σ=10-12S / m associated with the arc-extinguishing chamber and other related media; the operating parameters include: the excitation voltage U=1675kV (lightning impulse equivalent voltage), frequency f=50Hz, and breaking speed v=1.8-2.2m / s associated with the high-voltage end, etc.; the main-auxiliary gap opening ratio is constrained to d1:d2=1:1;

[0108] S2: Construct a fully parametric simulation model. Specifically, a parametric geometric model is established in CREO, structural parameters are set as design variables, and associated linked bodies are generated through the linker to simplify irrelevant details; the STP format model is exported and imported into COMSOL; parametric mesh generation (correlation between core region mesh density and contact radius, fracture opening distance) and boundary condition setting (correlation between voltage, grounding constraints and operating parameters) are achieved through COMSOL's built-in command flow; solver and post-processing command flows are written to automatically extract indicators such as maximum electric field strength and double-fracture voltage divider ratio;

[0109] S3: Predefined algorithm. Specifically, the convergence conditions of the objective function are set as follows: maximum electric field strength ≤ 24kV / mm, d1:d2 = 1:1, and voltage unevenness coefficient less than 1.03; the constraint condition is that each parameter is within its range; an improved NSGA-II algorithm and GA-BP neural network program are written in MATLAB, taking parameterized variables as input and electric field indices as output. After order reduction by GA-BP neural network, the improved algorithm is used for iteration, with an iteration step size of 10 times. Each iteration automatically calls the COMSOL parameterized simulation model to complete the simulation.

[0110] S4: Parameter iterative optimization. Specifically, such as... Figure 4 As shown, firstly, the design parameter combination is obtained through the predefined algorithm of S3, and then the design parameter combination is input into the parametric simulation model for configuration:

[0111] Configure the parametric geometric model based on the structural parameters, reconstruct the three-dimensional geometric model, and enable the three-dimensional geometric model to be automatically updated according to the structural parameters;

[0112] The system automatically determines the mesh quality of each region of the 3D geometric model based on structural parameters and generates the corresponding 3D mesh model.

[0113] Based on the medium parameters and / or operating condition parameters, simulation boundary conditions are applied, and constraints such as voltage are automatically labeled.

[0114] After configuring the parameterized simulation model, the solver automatically solves the problem and outputs electric field simulation results including information such as maximum field strength, voltage division ratio, and battery uniformity.

[0115] The parameters are iteratively optimized and simulated until the output of the electric field simulation results that satisfy the convergence condition of the objective function is achieved.

[0116] S5: Simulation Verification and Parameter Output. After iterative optimization, the design parameter combination is obtained as follows: d1=65mm, d2=65mm, Dp=90mm, v=2.0m / s, α=[90°, 90°], d=490mm. Substituting these parameters into the parameterized model for simulation, the maximum electric field strength is 21kV / mm, d1:d2=1:1, and the optimal voltage unevenness coefficient is 1.01, satisfying the convergence condition of the objective function. The optimal design parameter combination is then output.

[0117] In practical applications, such as Figure 5 As shown, the geometric models of the voltage equalizing capacitors at different installation angles are illustrated, and the simulation results obtained from electric field simulations of various geometric models are as follows. Figure 6 As shown, the voltage unevenness coefficient corresponding to the installation angle of the equalizing capacitor with "high front and low front" is 1.01, which can satisfy the convergence condition of the objective function.

[0118] S6: Batch Simulation: Based on different design requirements, input the capacitance values ​​of three equalizing capacitors (1000pF, 1500pF, 2000pF), and the parametric model will automatically adjust the structural parameters and operating parameters to complete batch simulation, generating corresponding electric field simulation reports and optimal parameter combinations, greatly improving design efficiency.

[0119] The above workflow has the following advantages:

[0120] A full-process parametric simulation model was constructed, realizing the full parametric linkage of geometric model, mesh model, boundary conditions, and simulation solution. This solved the problems of cumbersome parameter adjustment and repeated modeling and subdivision in traditional simulation. The model is automatically updated after parameter adjustment, which greatly improves simulation efficiency and shortens the circuit breaker design cycle.

[0121] A multi-parameter coupled optimization and automated iteration mechanism was established. By combining the GA-BP neural network and the improved NSGA-Ⅱ algorithm, the parameters were accurately optimized. At the same time, the voltage division characteristics of the double-break were considered to ensure that the optimized parameter combination takes into account both the uniformity of the electric field and the rationality of the voltage division. This solved the limitations of traditional single-parameter optimization and improved the accuracy of equipment design optimization.

[0122] It realizes parameter sensitivity analysis and batch simulation functions, which can quickly analyze the influence of a single parameter on the electric field distribution, and meet the batch simulation of different design requirements. It is suitable for the diverse design requirements of high voltage level double-break circuit breakers, reduces the workload of designers, and improves design efficiency and design quality.

[0123] Parametric modeling solves the problem of low simulation efficiency for complex double-fracture structures. Ordinary designers do not need to master complex modeling and simulation skills to complete the simulation by adjusting parameters, thus lowering the application threshold of simulation technology.

[0124] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages in other steps. It is understood that the steps in different embodiments can be freely combined as needed, and all non-contradictory solutions formed by such combinations are within the scope of protection of this application.

[0125] Based on the same inventive concept, this application also provides an electric field simulation device for a double-break circuit breaker to implement the electric field simulation method for the double-break circuit breaker described above. The solution provided by this device is similar to the solution described in the above method. Therefore, the specific limitations of one or more embodiments of the electric field simulation device for double-break circuit breakers provided below can be found in the limitations of the electric field simulation method for double-break circuit breakers described above, and will not be repeated here.

[0126] In one exemplary embodiment, such as Figure 7 As shown, an electric field simulation device for a double-break circuit breaker is provided, comprising:

[0127] The acquisition module is used to acquire the design parameter combination of the double-break circuit breaker to be simulated according to a preset objective function; the design parameter combination includes the structural parameters, medium parameters and operating condition parameters of the double-break circuit breaker;

[0128] A configuration module is used to configure a parametric simulation model of the double-break circuit breaker according to the design parameter combination; wherein the parametric simulation model includes at least a parametric geometric model and a parametric mesh model; the parametric geometric model and the parametric mesh model are configured according to the structural parameters; the simulation boundary conditions associated with the parametric simulation model are configured according to the medium parameters and / or the operating condition parameters;

[0129] The simulation module is used to perform electric field simulation on the parameterized simulation model to obtain the electric field simulation results of the double-break circuit breaker.

[0130] The iteration module is used to return to the step of obtaining the design parameter combination of the double-break circuit breaker to be simulated according to the preset objective function, until the electric field simulation result meets the convergence condition of the objective function.

[0131] In one embodiment, obtaining the design parameter combination of the dual-break circuit breaker to be simulated according to a preset objective function includes:

[0132] Minimizing the maximum electric field intensity inside the double-break circuit breaker, and ensuring that the voltage division ratio of the two breaks of the double-break circuit breaker is equal to the opening distance ratio, are used as the optimization objectives of the objective function associated with the preset multi-objective parameter optimization algorithm.

[0133] The design parameter combination is obtained according to the objective function and the multi-objective parameter optimization algorithm.

[0134] In one embodiment, obtaining the simulation parameter combination according to the objective function using the multi-objective parameter optimization algorithm includes:

[0135] The simulation parameter combination is obtained through the multi-objective parameter optimization algorithm according to the objective function and preset constraints.

[0136] The preset constraints include that the maximum electric field strength inside the double-break circuit breaker is less than or equal to the preset dielectric breakdown electric field strength, and that the structural parameters, dielectric parameters, and operating condition parameters are within the corresponding preset value ranges.

[0137] In one embodiment, configuring the parameterized simulation model of the double-break circuit breaker according to the design parameter combination includes:

[0138] Configure the structural parameters as the geometric parameters of the parameterized geometric model;

[0139] The mesh density values ​​of each model region of the parameterized geometric model are determined based on the structural parameters.

[0140] Each of the aforementioned mesh density values ​​is configured as the corresponding mesh density parameter of the parameterized mesh model.

[0141] In one embodiment, the method further includes:

[0142] If the electric field simulation results meet the convergence conditions, obtain the test data of the double-break circuit breaker associated with the design parameter combination;

[0143] By comparing the design parameter combination with the experimental data, a data comparison result is obtained; the data comparison result is used to characterize whether the design parameter combination is reasonable.

[0144] If the data comparison results indicate that the design parameter combination is reasonable, the design parameter combination is used as the target design parameter combination for the double-break circuit breaker and output.

[0145] In one embodiment, the structural parameters include at least one of the double-break gap distance, contact fillet radius, and equalizing capacitor mounting angle; the dielectric parameters include the relative permittivity and / or conductivity of the arc-extinguishing medium; and the operating parameters include at least one of the applied voltage amplitude, voltage frequency, and breaking speed.

[0146] The modules in the electric field simulation device for the aforementioned double-break circuit breaker can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0147] In one exemplary embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 8As shown, this computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The database stores relevant data. The I / O interfaces are used for exchanging information between the processor and external devices. The communication interface is used for communicating with external terminals via a network. When the computer program is executed by the processor, it implements an electric field simulation method for a double-break circuit breaker.

[0148] Those skilled in the art will understand that Figure 8 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0149] In one exemplary embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the electric field simulation method for a double-break circuit breaker as described above.

[0150] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the electric field simulation method for a double-break circuit breaker as described above.

[0151] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the electric field simulation method for a double-break circuit breaker as described above.

[0152] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0153] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0154] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0155] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for simulating the electric field of a double-break circuit breaker, characterized in that, The method includes: According to the preset objective function, the design parameter combination of the double-break circuit breaker to be simulated is obtained; the design parameter combination includes the structural parameters, medium parameters and operating condition parameters of the double-break circuit breaker; Based on the design parameter combination, a parametric simulation model of the double-break circuit breaker is configured; wherein, the parametric simulation model includes at least a parametric geometric model and a parametric mesh model; the parametric geometric model and the parametric mesh model are configured according to the structural parameters; the simulation boundary conditions associated with the parametric simulation model are configured according to the medium parameters and / or the operating condition parameters; Electric field simulation was performed on the parameterized simulation model to obtain the electric field simulation results of the double-break circuit breaker; Return to the step of obtaining the design parameter combination of the double-break circuit breaker to be simulated according to the preset objective function, until the electric field simulation result meets the convergence condition of the objective function.

2. The method according to claim 1, characterized in that, The step of obtaining the design parameter combination of the dual-break circuit breaker to be simulated according to the preset objective function includes: Minimizing the maximum electric field intensity inside the double-break circuit breaker, and ensuring that the voltage division ratio of the two breaks of the double-break circuit breaker is equal to the opening distance ratio, are used as the optimization objectives of the objective function associated with the preset multi-objective parameter optimization algorithm. The design parameter combination is obtained according to the objective function and the multi-objective parameter optimization algorithm.

3. The method according to claim 2, characterized in that, The step of obtaining the simulation parameter combination according to the objective function through the multi-objective parameter optimization algorithm includes: The simulation parameter combination is obtained through the multi-objective parameter optimization algorithm according to the objective function and preset constraints. The preset constraints include that the maximum electric field strength inside the double-break circuit breaker is less than or equal to the preset dielectric breakdown electric field strength, and that the structural parameters, dielectric parameters, and operating condition parameters are within the corresponding preset value ranges.

4. The method according to any one of claims 1 to 3, characterized in that, The step of configuring the parametric simulation model of the double-break circuit breaker according to the design parameter combination includes: Configure the structural parameters as the geometric parameters of the parameterized geometric model; The mesh density values ​​of each model region of the parameterized geometric model are determined based on the structural parameters. Each of the aforementioned mesh density values ​​is configured as the corresponding mesh density parameter of the parameterized mesh model.

5. The method according to any one of claims 1 to 3, characterized in that, The method further includes: If the electric field simulation results meet the convergence conditions, obtain the test data of the double-break circuit breaker associated with the design parameter combination; By comparing the design parameter combination with the experimental data, a data comparison result is obtained; the data comparison result is used to characterize whether the design parameter combination is reasonable. If the data comparison results indicate that the design parameter combination is reasonable, the design parameter combination is used as the target design parameter combination for the double-break circuit breaker and output.

6. The method according to any one of claims 1 to 3, characterized in that, The structural parameters include at least one of the following: double-break gap distance, contact fillet radius, and equalizing capacitor installation angle; the dielectric parameters include the relative permittivity and / or conductivity of the arc-extinguishing medium; and the operating parameters include at least one of the following: applied voltage amplitude, voltage frequency, and breaking speed.

7. An electric field simulation device for a double-break circuit breaker, characterized in that, The device includes: The acquisition module is used to acquire the design parameter combination of the double-break circuit breaker to be simulated according to a preset objective function; the design parameter combination includes the structural parameters, medium parameters and operating condition parameters of the double-break circuit breaker; A configuration module is used to configure a parametric simulation model of the double-break circuit breaker according to the design parameter combination; wherein the parametric simulation model includes at least a parametric geometric model and a parametric mesh model; the parametric geometric model and the parametric mesh model are configured according to the structural parameters; the simulation boundary conditions associated with the parametric simulation model are configured according to the medium parameters and / or the operating condition parameters; The simulation module is used to perform electric field simulation on the parameterized simulation model to obtain the electric field simulation results of the double-break circuit breaker. The iteration module is used to return to the step of obtaining the design parameter combination of the double-break circuit breaker to be simulated according to the preset objective function, until the electric field simulation result meets the convergence condition of the objective function.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

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