Circuit breaker simulation method and device, computer equipment and storage medium

Abstract

The invention relates to a circuit breaker simulation method and device, computer equipment and a storage medium. The method comprises the following steps: a simulation step: for each simulation time step, simulating an arc extinguishing process in an arc extinguishing chamber of the circuit breaker according to a constructed first simulation model to obtain piston simulation operation parameters, the first simulation model being used for arc magnetofluid simulation of the circuit breaker; according to the piston simulation operation parameters and a constructed second simulation model, the mechanical motion process of the circuit breaker is simulated, mechanical simulation operation parameters are obtained, and the second simulation model is used for mechanical motion simulation of the circuit breaker; and according to the mechanical simulation operation parameters, updating boundary conditions of the first simulation model, and returning to the simulation step until a preset simulation end condition is met, thereby obtaining circuit breaker simulation data. By adopting the method, the simulation accuracy of the circuit breaker can be improved.

Description

Technical Field

[0001] This application relates to the field of circuit breaker simulation technology, and in particular to a circuit breaker simulation method, apparatus, computer equipment, and storage medium. Background Technology

[0002] Although progress has been made in high-voltage switch arc simulation technology, the problem of disconnect between the arc and the mechanism still exists. Factors such as the mechanism's motion speed, trajectory, and time directly affect the arc length, shape, and duration, thus limiting the arc extinguishing performance; the electromagnetic force and heat generated by the arc also have a reaction effect on the mechanism's motion state.

[0003] Circuit breaker simulations in related technologies often directly set relevant parameters, resulting in a certain gap between the simulation and the real situation. Summary of the Invention

[0004] Therefore, it is necessary to provide a circuit breaker simulation method, apparatus, computer equipment, computer-readable storage medium, and computer program product that can improve the simulation accuracy in response to the above-mentioned technical problems.

[0005] Firstly, this application provides a circuit breaker simulation method, including:

[0006] Simulation steps: For each simulation time step, based on the constructed first simulation model, the arc extinguishing process in the arc extinguishing chamber of the circuit breaker is simulated to obtain the piston simulation operating parameters. The first simulation model is used for the arc magnetohydrodynamic simulation of the circuit breaker.

[0007] Based on the piston simulation operating parameters and the constructed second simulation model, the mechanical motion process of the circuit breaker is simulated to obtain the mechanical simulation operating parameters. The second simulation model is used for the mechanical motion simulation of the circuit breaker.

[0008] Based on the mechanical simulation operating parameters, update the boundary conditions of the first simulation model, return to the simulation step, and continue until the preset simulation termination conditions are met to obtain the circuit breaker simulation data.

[0009] Secondly, this application also provides a circuit breaker simulation device, comprising:

[0010] The first simulation module is used for simulation steps: For each simulation time step, based on the constructed first simulation model, the arc extinguishing process in the arc extinguishing chamber of the circuit breaker is simulated to obtain the piston simulation operating parameters. The first simulation model is used for the arc magnetohydrodynamic simulation of the circuit breaker.

[0011] The second simulation module is used to simulate the mechanical motion process of the circuit breaker based on the piston simulation operating parameters and the constructed second simulation model, and obtain the mechanical simulation operating parameters. The second simulation model is used for the mechanical motion simulation of the circuit breaker.

[0012] The data transmission module is used to update the boundary conditions of the first simulation model according to the mechanical simulation operation parameters, return to the simulation step, and continue until the preset simulation end conditions are met to obtain the circuit breaker simulation data.

[0013] 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 steps in any of the circuit breaker simulation method embodiments described above.

[0014] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps in any of the circuit breaker simulation method embodiments described above.

[0015] Fifthly, this application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps in any of the circuit breaker simulation method embodiments described above.

[0016] The circuit breaker simulation method, apparatus, computer equipment, computer-readable storage medium, and computer program product described above differ from the method of simulating circuit breakers by setting relevant parameters of the mechanism in related technologies. Instead, they pre-construct a first simulation model and a second simulation model, which are used to simulate the arc magnetofluid and mechanical motion of the circuit breaker, respectively. In the actual simulation process, for each simulation time step, based on the constructed first simulation model, the arc extinguishing process of the circuit breaker's arc-extinguishing chamber is simulated to obtain the piston simulation operating parameters of the piston in the arc-extinguishing chamber. Subsequently, based on the piston simulation operating parameters and the constructed second simulation model, the mechanical motion process of the circuit breaker is simulated to obtain the mechanical simulation operating parameters. Then, based on the mechanical simulation operating parameters, the boundary conditions of the first simulation model are updated, and the operation of the first simulation model in the next time step is entered. In this way, a closed-loop coupled simulation of the circuit breaker is formed. Furthermore, the influence of the motion characteristics between the circuit breaker operating mechanism and the compressed air piston on the air blowing capacity and arc extinguishing performance during the circuit breaker's breaking process is realized, as well as the reaction effect of the thermal effect generated by the electric arc on the mechanism's motion state. In addition, during the circuit breaker's breaking process, factors such as compression and high temperature will generate a reaction force on the compressed air piston, affecting its motion process. Therefore, by adopting the coupled simulation between the above two simulation models, the accuracy of the circuit breaker simulation is improved, and the reliability of the simulation data is enhanced. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a diagram illustrating the application environment of a circuit breaker simulation method in one embodiment.

[0019] Figure 2 This is a flowchart illustrating a circuit breaker simulation method in one embodiment;

[0020] Figure 3 This is a schematic diagram of the operating model of the operating mechanism in one embodiment;

[0021] Figure 4 This is a schematic diagram of a two-dimensional axisymmetric circuit breaker geometric sub-model in one embodiment;

[0022] Figure 5 This is a schematic diagram of the piston wall mesh in one embodiment;

[0023] Figure 6 This is a schematic diagram of the coupling parameter transmission process in one embodiment;

[0024] Figure 7 This is a flowchart illustrating the circuit breaker simulation method in a detailed embodiment;

[0025] Figure 8 This is a structural block diagram of a circuit breaker simulation device in one embodiment;

[0026] Figure 9 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0027] 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.

[0028] Circuit breaker: A circuit breaker is a switching device used to automatically disconnect circuits to prevent electrical equipment and lines from being damaged by faults such as overloads and short circuits. It is commonly used in power systems to close, carry, and interrupt current under normal or abnormal circuit conditions.

[0029] Circuit breaker operating mechanism: The circuit breaker operating mechanism is a mechanical device used to control the closing and opening operations of a high-voltage circuit breaker. It converts different forms of energy into the force required to operate the circuit breaker, thereby connecting and disconnecting the circuit. The operating mechanism typically consists of a power unit, an active unit, a transmission unit, and a buffer unit. Its functions include closing, maintaining the closed position, opening, reclosing, free tripping, preventing tripping, resetting, buffering, and interlocking.

[0030] Spring-operated mechanism: A spring-operated mechanism is a mechanical operating device for circuit breakers, utilizing the energy stored and released by a spring to achieve opening and closing operations. Its working principle is as follows: energy is stored in the closing spring via a motor or manual energy storage, while the opening spring automatically stores energy during the closing process. During closing, the energy of the closing spring is released to drive the contacts to close; during opening, the energy of the opening spring is used to separate the contacts. This mechanism features a compact structure, fast action, low operating power, and high reliability, and is widely used in medium and high voltage circuit breakers, performing particularly well in applications requiring frequent operation. It is an important actuator for switching equipment in power systems.

[0031] In one exemplary embodiment, such as Figure 1 As shown, a circuit breaker simulation method is provided, including the following steps (hereinafter referred to as S) S100 to S300. Wherein:

[0032] S100, Simulation steps: For each simulation time step, based on the constructed first simulation model, simulate the arc extinguishing process of the circuit breaker's arc extinguishing chamber to obtain the piston simulation operating parameters. The first simulation model is used for the arc magnetohydrodynamic simulation of the circuit breaker.

[0033] The piston simulation operating parameters may include, but are not limited to, the pressure and force of the compressed air piston. In a circuit breaker, the compressed air piston is usually connected to the moving contact and moves together with the moving contact during the opening process. When the moving contact separates from the stationary contact, the piston compresses SF6 (sulfur hexafluoride) gas, and the high-pressure gas is ejected through the nozzle, creating a gas blowout arc extinguishing effect. The compressed air piston of the SF6 circuit breaker is connected to the operating mechanism. The operating mechanism controls the movement of the insulating pull rod to change the direction of the nozzle (downward or upward), thereby realizing the opening or closing operation. During the opening process, the high-pressure gas generated by the arc combustion pushes the compressed air piston to compress the gas and ejects it through the nozzle to extinguish the arc; during the closing process, the gas is drawn into the compressed air cylinder to await the next operation.

[0034] The first simulation model simulates the generation, development, cooling, and extinction of an electric arc in high-temperature, high-pressure SF6 gas during circuit breaker breaking. For the arcing process, a two-dimensional MHD (magnetohydrodynamic) arc model is used for simulation research. The two-dimensional MHD arc model is a mathematical model used to describe the behavior of a two-dimensional electric arc plasma under the influence of a magnetic field. It combines fluid dynamics, electromagnetics, and thermodynamic equations to simulate the physical processes of arc motion, heat transfer, mass transfer, and current distribution in an electromagnetic field.

[0035] The first simulation model may include a circuit breaker geometric model and an MHD arc model. The circuit breaker geometric model is constructed based on the geometry of the arc-extinguishing chamber, which includes contacts, nozzles, a compressor cylinder, and a piston. The MHD arc model is constructed based on the mass conservation equation, momentum conservation equation, energy conservation equation, and electromagnetic field model.

[0036] In practical applications, a geometric model can be pre-constructed in the simulation software of the terminal device based on the geometric structure of the arc-extinguishing chamber. An MHD arc model can be constructed based on the mass conservation equation, momentum conservation equation, energy conservation equation and electromagnetic field model. The physical properties of sulfur hexafluoride gas (such as density, viscosity, thermal conductivity and electrical conductivity) and the boundary conditions and solver of the model can be initialized to obtain the first simulation model.

[0037] In practice, the first simulation model can be run, and the MHD arc model can be solved by the solver to obtain the piston simulation operation parameters, including the pressure and force of the compressed piston.

[0038] S200, based on the piston simulation operating parameters and the constructed second simulation model, simulates the mechanical motion process of the circuit breaker to obtain the mechanical simulation operating parameters. The second simulation model is used for the mechanical motion simulation of the circuit breaker.

[0039] The mechanical simulation parameters may include piston displacement, piston acceleration, contact displacement, and contact acceleration. The second simulation model is used to simulate the motion process of the circuit breaker's operating mechanism. The second simulation model may include a motion model of the operating mechanism.

[0040] In practical applications, a motion model of the operating mechanism can be pre-built in the simulation software of the terminal device to obtain a second simulation model, which is used to simulate the kinematic and dynamic response of each component (spring, connecting rod, piston) of the spring operating mechanism during the opening process, and to consider the influence of gas reaction force.

[0041] In practice, the configuration parameters of the compressor piston in the second simulation model are modified according to the piston simulation operating parameters. Specifically, the piston displacement, piston acceleration, contact displacement, and contact acceleration can be determined by solving the motion differential equations using numerical methods based on the piston simulation operating parameters and the second simulation model.

[0042] S300: Update the boundary conditions of the first simulation model according to the mechanical simulation operation parameters, return to S200, and continue until the preset simulation end conditions are met to obtain the circuit breaker simulation data.

[0043] The preset simulation termination conditions include, but are not limited to, the moving and stationary contacts reaching their maximum opening distance (stroke completion) in the second simulation model, the arc current crossing zero and extinguishing, and the simulation time reaching a preset upper limit.

[0044] The circuit breaker simulation data may include, but is not limited to, the motion characteristic data of the compressor piston and the arc extinguishing performance index data. The motion characteristic data of the compressor piston may include displacement-time curves, velocity-time curves, and acceleration-time curves. The arc extinguishing performance index data may include arc temperature distribution data, arc voltage, gas pressure distribution data, gas blowing velocity (flow velocity at the nozzle), and arcing time (time from arc ignition to extinction).

[0045] In practical implementation, following the above, the mechanical simulation parameters output by the second simulation model can be transmitted back to the first simulation model. The first simulation model updates the boundary conditions in the solver based on the piston acceleration and enters the next time step of the first simulation model's operation. Throughout the entire coupled simulation process, the piston and contact displacements can be monitored through the second simulation model. If the piston displacement or contact displacement exceeds the preset maximum opening distance, the tripping action is determined to be complete, and the simulation is terminated.

[0046] Alternatively, the simulation can monitor the conductivity or temperature of the arc channel through the first simulation module. If the arc temperature remains below a preset temperature or the conductivity approaches 0, it indicates that the arc has been extinguished, and the simulation termination condition is met. Another approach is to statistically analyze the simulation time. If the simulation time reaches a preset upper limit (set according to the tripping cycle, e.g., a preset upper limit of 20 milliseconds), or if the simulation time is greater than or equal to the preset upper limit, the simulation is terminated. The following data are collected to obtain the circuit breaker simulation data: displacement-time curve of the compressed air piston; velocity-time curve; acceleration-time curve; arc temperature distribution data; arc voltage; gas pressure distribution data; gas blowing speed (flow velocity at the nozzle); and arcing time (time from arc ignition to extinguishment).

[0047] The circuit breaker simulation method described above differs from the method of setting relevant parameters of the mechanism to simulate the circuit breaker in related technologies. Instead, a first simulation model and a second simulation model are pre-built to simulate the arc magnetohydrodynamics and mechanical motion of the circuit breaker, respectively. In the actual simulation process, for each simulation time step, based on the constructed first simulation model, the arc extinguishing process of the circuit breaker's arc-extinguishing chamber is simulated to obtain the piston simulation operating parameters of the piston in the arc-extinguishing chamber. Subsequently, based on the piston simulation operating parameters and the constructed second simulation model, the mechanical motion process of the circuit breaker is simulated to obtain the mechanical simulation operating parameters. Then, based on the mechanical simulation operating parameters, the boundary conditions of the first simulation model are updated, and the operation of the first simulation model in the next time step is entered. In this way, a closed-loop coupled simulation of the circuit breaker is formed. Furthermore, the influence of the motion characteristics between the circuit breaker operating mechanism and the compressed air piston on the air blowing capacity and arc extinguishing performance during the circuit breaker's breaking process is realized, as well as the reaction effect of the thermal effect generated by the electric arc on the mechanism's motion state. In addition, during the circuit breaker's breaking process, factors such as compression and high temperature will generate a reaction force on the compressed air piston, affecting its motion process. Therefore, by adopting the coupled simulation between the above two simulation models, the accuracy of the circuit breaker simulation is improved, and the reliability of the simulation data is enhanced.

[0048] In one exemplary embodiment, the first simulation model includes a magnetohydrodynamic arc simulation sub-model, such as... Figure 2 As shown, based on the constructed first simulation model, the arc extinguishing process of the circuit breaker's arc-extinguishing chamber is simulated, and the piston simulation operating parameters are obtained, including S101 to S103, where:

[0049] S101. Based on the first simulation model and the mechanical simulation operation parameters of the previous simulation time step, solve the magnetohydrodynamic arc simulation sub-model to obtain the arc extinguishing chamber simulation parameters.

[0050] In this embodiment, the magnetohydrodynamic arc simulation sub-model can be an MHD arc model. The simulation parameters of the arc-extinguishing chamber may include, but are not limited to, the distribution of temperature, pressure, velocity, current density, and magnetic induction intensity within the arc-extinguishing chamber.

[0051] In practice, the mechanical simulation motion parameters output by the second simulation model in the previous simulation time step can be used to solve the magnetohydrodynamic arc simulation sub-model and obtain the distribution of temperature, pressure, velocity, current density and magnetic induction intensity in the arc extinguishing chamber.

[0052] S102, extract the pressure parameters of multiple preset piston grids from the simulation parameters of the arc extinguishing chamber.

[0053] In practice, all grid cells set on the piston wall are traversed, and the gas pressure of each cell is read to obtain the pressure parameters.

[0054] S103 converts the pressure parameters into force parameters to obtain the piston simulation operation parameters.

[0055] In practice, pressure is essentially a force distribution parameter (P=F / A), so it is necessary to first convert pressure into a mechanical quantity, and then derive velocity through dynamic equations. The core process is: pressure parameter (P) → force calculation (F=P×area A), converting pressure into force and then using it as a coupling parameter for transmission. The piston simulation operation parameters include the pressure parameters of the piston wall.

[0056] In this embodiment, the pressure parameters of the compressor piston subjected to high-temperature and high-pressure gas are obtained through parameter-coupled simulation, which helps to make the simulation process consistent with the actual situation and improve the accuracy of the simulation.

[0057] In an exemplary embodiment, the piston simulation operating parameters include pressure parameters. Based on the piston simulation operating parameters and the constructed second simulation model, the mechanical motion process of the circuit breaker is simulated to obtain mechanical simulation operating parameters, including S201 to S202, wherein:

[0058] S201. Based on the pressure parameters and the preset circuit breaker mechanism constraints, solve the mechanical dynamic sub-model in the second simulation model to obtain the mechanical motion parameters.

[0059] S202, extract the piston speed parameters from the mechanical motion parameters. The mechanical simulation operation parameters include the piston speed parameters.

[0060] In this embodiment, the second simulation model includes a mechanical power sub-model (i.e., the motion model of the operating mechanism), such as... Figure 3 As shown. Mechanical motion parameters may include, but are not limited to, piston acceleration, velocity, displacement, and the pulling force of the operating rod. Piston velocity parameters include piston velocity and acceleration.

[0061] The preset circuit breaker constraints are generated based on the mechanism topology (revolute joint, prismatic joint, fixed joint).

[0062] In practical implementation, pressure parameters are received through a second simulation model, pressure is applied to the target surface, and dynamic simulation is performed within a predefined simulation time and number of steps. The second simulation model automatically calculates the motion state of each component. Specifically, during the tripping process, the released main mechanism trips under the driving force of the tripping spring, causing the compressed air piston to move at high speed. During this process, the air chamber reaction force transmitted by the first simulation model is also applied as a load to the wall of the compressed air piston, while retaining the original driving forces: tripping spring force, gravity, damping force, etc. Then, the dynamic equations are established and solved: Since the components of the mechanism are connected by constraints such as revolute joints, prismatic joints, and fixed joints, the circuit breaker constraint equations (circuit breaker constraint conditions) are generated based on the connection relationships between the revolute joints, prismatic joints, and fixed joints. Based on the preset circuit breaker constraint conditions, a set of algebraic-kinematic differential equations is formed and solved:

[0063]

[0064] Where [M] is the mass matrix, [C] is the damping matrix, [K] is the stiffness matrix from the constraints, {Q} is the generalized force vector (including spring force, gravity, air chamber reaction force, etc.), and {q} is the generalized coordinate vector.

[0065] The pulling force exerted by the lever on the compressor piston can be obtained by solving the simultaneous Jacobian matrix equations. The acceleration of the compressor piston can then be obtained according to Newton's second law.

[0066]

[0067] in It is the pulling force exerted by the lever on the compressor piston. This is the air chamber reaction force output by the first simulation model, where m is the mass of the compressor piston and connecting mechanism. The air chamber reaction force can be obtained by numerically integrating the pressure and area of ​​multiple piston grids. After one time step of simulation, the piston velocity or acceleration is derived from the mechanical motion parameters to obtain the mechanical simulation operating parameters.

[0068] In this embodiment, the influence of the pressure of high-temperature and high-pressure gas on the circuit breaker tripping process is considered. The mechanical motion simulation is performed using the pressure parameters of the piston in the first simulation model, and the piston speed parameters are solved, thereby improving the accuracy of the mechanical motion simulation.

[0069] In an exemplary embodiment, the construction of the first simulation model includes steps S400 to S500, wherein:

[0070] S400 constructs a magnetohydrodynamic arc simulation sub-model and a circuit breaker geometric sub-model based on the structural and electrical parameters of the circuit breaker.

[0071] Among them, electrical parameters include, but are not limited to, fluid density, gas pressure, tensor, current density vector, magnetic flux density, thermal conductivity, fluid temperature, energy, magnetic flux density vector, current density vector, electric field strength vector, and conductivity, etc.

[0072] In this embodiment, the magnetohydrodynamic (MHD) arc simulation sub-model is the MHD arc model. The MHD arc simulation sub-model is established using the following three conservation equations and Maxwell's equations:

[0073] The mass conservation equation is:

[0074]

[0075] In the formula, t represents time. For fluid density, The velocity vector of the fluid motion;

[0076] The momentum conservation equation is:

[0077]

[0078] In the formula, p is the gas pressure, τ is the tensor, j is the current density vector, and B is the magnetic flux density.

[0079] The energy conservation equation is:

[0080]

[0081]

[0082]

[0083]

[0084] In the formula, k is the thermal conductivity, T is the fluid temperature, and E is the energy. The intense radiative dissipation caused by the photothermal effect of the electric arc. Where is the Joule heat input under the action of electric current, and h is the enthalpy. Let be the partition function of particle j. Let j be the mass fraction of particle j. For the enthalpy change of particle j, Let j be the mass of particle j. Let j be the enthalpy of particle j. For fluid velocity vector, is the Boltzmann constant, 1.380649×10−23J / K.

[0085] Maxwell's equations (electromagnetic field equations):

[0086]

[0087] In the formula, It is the magnetic flux density vector. It is the current density vector. The electric field intensity vector, For electric potential, For electrical conductivity, The relative permeability of vacuum; and These are the radial and axial components of the magnetic vector, respectively. and These are unit vectors representing the radial and axial directions, respectively, where z represents the axial direction and r represents the radial direction. and These are the radial and axial current density vectors, respectively.

[0088] The geometric parameters may include, but are not limited to, the components of the circuit breaker and the positional parameters between these components. The components of the circuit breaker may include the compressor chamber, moving contacts, stationary contacts, and nozzles. In specific implementations, a geometric sub-model of the circuit breaker is constructed based on the positional and geometric parameters between these components.

[0089] S500 simplifies the magnetohydrodynamic arc simulation sub-model and the circuit breaker geometry sub-model to obtain the first simulation model.

[0090] In this embodiment, to improve simulation speed and accuracy, the circuit breaker geometric sub-model and the magnetohydrodynamic arc simulation sub-model are simplified and equivalent, constructing a two-dimensional axisymmetric circuit breaker geometric sub-model, such as... Figure 4 As shown, the magnetohydrodynamic arc simulation sub-model is simplified and equivalent based on the simplified circuit breaker geometric sub-model.

[0091] Furthermore, considering that in relevant arc simulation technologies, the speed of the compressed piston is set before simulation, lacking realism and accuracy, and also considering the hindering effect of the high-temperature, high-pressure gas generated by the circuit breaker's opening on the movement of the compressed piston, in order to obtain the piston's true stroke, such as... Figure 5 As shown, a mesh layer is set on the piston wall to facilitate the acquisition of the piston wall pressure and the subsequent piston velocity calculation using the pressure. The first simulation model includes a simplified magnetohydrodynamic arc simulation sub-model and a circuit breaker geometry sub-model. The piston region of the circuit breaker geometry sub-model also includes a piston mesh.

[0092] In this embodiment, on the one hand, the construction and simplification of the equivalent through the magnetohydrodynamic arc simulation sub-model and the circuit breaker geometry sub-model are beneficial to improving the simulation speed and accuracy. On the other hand, by setting the piston mesh, it is beneficial to obtain the pressure parameters generated by the high temperature and high pressure gas generated in the arc extinguishing chamber on the wall surface, thereby improving the accuracy of the circuit breaker coupling simulation.

[0093] In one exemplary embodiment, the method further includes:

[0094] The piston simulation parameters are converted according to a preset first data format to obtain the converted piston simulation parameters. The preset data format matches the data format of the second simulation model.

[0095] The mechanical simulation parameters are converted according to the preset second data format to obtain the converted mechanical simulation parameters; the preset second data format matches the data format of the second simulation model.

[0096] In this embodiment, since the first simulation model and the second simulation model are heterogeneous models, during the coupled simulation process, it is necessary to perform data format conversion and unit conversion on the data output by the first simulation model and the data output by the second simulation model, respectively. Specifically, the piston simulation operating parameters are converted according to a preset first data format that matches the data format of the second simulation model to obtain the converted piston simulation operating parameters. The mechanical simulation operating parameters are converted according to a preset second data format that matches the data format of the first simulation model to obtain the converted mechanical simulation operating parameters. This improves the robustness of the coupled simulation.

[0097] In one exemplary embodiment, the method further includes:

[0098] Based on a preset communication protocol, the converted piston simulation parameters are forwarded to the second simulation model, and the simulation timestamp is synchronized.

[0099] Based on a preset communication protocol, the converted mechanical simulation operation parameters are forwarded to the first simulation model.

[0100] In this embodiment, a set of data relay processing nodes (programs) based on the TCP communication protocol were designed to build a data interaction channel for coupling simulation parameters for the first simulation model and the second simulation model.

[0101] In practice, Fluent (Master) is the first simulation model and also the master node, while Adams (Slave) is the second simulation model and also the slave nodes, such as... Figure 6 The diagram illustrates the interaction between the first simulation model, the second simulation model, and the data relay processing node. Specifically, the data relay processing node actively monitors the target data (piston simulation operating parameters and mechanical simulation operating parameters) of the first and second simulation models during the simulation process, and achieves bidirectional transmission of the target data between the heterogeneous simulation environments through the high reliability and connection stability of the TCP protocol.

[0102] Specifically, at the current simulation time step, the first simulation model outputs CFD (fluid dynamics) data containing piston simulation operating parameters and a timestamp to the data relay processing node. Since the first and second simulation models are heterogeneous models, the data relay processing node performs data format conversion and unit conversion on the CFD (fluid dynamics) data containing piston simulation operating parameters to adapt the converted data to the second simulation model. Subsequently, it forwards the converted and unit-converted data along with a synchronization command to the second simulation model. The second simulation model performs dynamic calculations based on the received data and returns structural mechanics results containing mechanical simulation operating parameters to the data relay processing node. The data relay processing node performs data format conversion and unit conversion on the structural mechanics results and forwards the converted and unit-converted structural mechanics results to the first simulation model, enabling the first simulation model to update the fluid boundary conditions and enter the simulation calculation for the next simulation time step, thus achieving a closed loop.

[0103] In this embodiment, master-slave step-lock synchronization is used to ensure that the calculation pace between the first simulation model and the second simulation model is consistent, thereby improving the accuracy of circuit breaker simulation.

[0104] To provide a clearer explanation of the circuit breaker simulation method provided in this application, a specific embodiment and... Figure 7 The specific embodiment includes the following steps:

[0105] S1. For each simulation time step, based on the first simulation model and the mechanical simulation operation parameters of the previous simulation time step, solve the magnetohydrodynamic arc simulation sub-model in the first simulation model to obtain the arc extinguishing chamber simulation parameters.

[0106] S2, extract the pressure parameters of multiple preset piston grids from the arc extinguishing chamber simulation parameters, convert the pressure parameters into pressure parameters, and obtain the piston simulation operation parameters.

[0107] S3. Convert the piston simulation parameters according to the preset first data format to obtain the converted piston simulation parameters; the preset first data format matches the data format of the second simulation model.

[0108] S4. Based on the preset communication protocol, forward the converted piston simulation running parameters to the second simulation model and synchronize the simulation timestamp.

[0109] S5. Based on the converted pressure parameters and the preset circuit breaker mechanism constraints, solve the mechanical dynamic sub-model in the second simulation model to obtain the mechanical motion parameters, and extract the piston speed parameters from the mechanical motion parameters.

[0110] S6, the piston speed parameters are converted according to the preset second data format to obtain the converted piston speed parameters; the preset second data format matches the data format of the second simulation model.

[0111] S7, based on a preset communication protocol, forwards the converted piston speed parameters to the first simulation model.

[0112] If the preset simulation end condition is not met in step S8, return to step S1 until the preset simulation end condition is met and the circuit breaker simulation data is obtained.

[0113] The aforementioned coupled simulation method for circuit breakers considers the obstructive effect of the high-temperature, high-pressure gas from the electric arc on the compressor piston during circuit breaker opening. Data communication is used to transmit the pressure parameters obtained from the first simulation model to the second simulation model, and then the velocity parameters obtained from the second simulation model are transmitted back to the first simulation model. This technical solution improves the accuracy of the simulation calculation of the circuit breaker mechanism's motion characteristics. Based on the actual stroke of the compressor piston, the arc simulation calculation results will be closer to reality. Furthermore, based on this, more reasonable arc combustion characteristics can be obtained, which is crucial for the analysis of arc behavior, providing reliable comprehensive analysis and prediction capabilities, and is of great significance for the overall design, optimization, and engineering application of circuit breakers.

[0114] 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 of other steps.

[0115] In one exemplary embodiment, such as Figure 8 As shown, a circuit breaker simulation device 600 is provided, including: a first simulation module 610, a second simulation module 620, and a data transmission module 630, wherein:

[0116] The first simulation module 610 is used for simulation steps: for each simulation time step, based on the constructed first simulation model, the arc extinguishing process in the arc extinguishing chamber of the circuit breaker is simulated to obtain the piston simulation operating parameters. The first simulation model is used for the arc magnetohydrodynamic simulation of the circuit breaker.

[0117] The second simulation module 620 is used to simulate the mechanical motion process of the circuit breaker based on the piston simulation operating parameters and the constructed second simulation model, and obtain the mechanical simulation operating parameters. The second simulation model is used for the mechanical motion simulation of the circuit breaker.

[0118] The data transmission module 630 is used to update the boundary conditions of the first simulation model according to the mechanical simulation operation parameters, return to the simulation step, and continue until the preset simulation end conditions are met to obtain the circuit breaker simulation data.

[0119] In an exemplary embodiment, the first simulation module 610 is further configured to solve the magnetohydrodynamic arc simulation sub-model based on the first simulation model and the mechanical simulation operation parameters of the previous simulation time step to obtain the arc-extinguishing chamber simulation parameters; extract the pressure parameters of a plurality of preset piston grids from the arc-extinguishing chamber simulation parameters; and convert the pressure parameters into pressure parameters to obtain the piston simulation operation parameters.

[0120] In an exemplary embodiment, the second simulation module 620 is further configured to solve the mechanical dynamic sub-model in the second simulation model based on the pressure parameters and the preset circuit breaker mechanism constraints to obtain mechanical motion parameters; extract piston speed parameters from the mechanical motion parameters; and the mechanical simulation operation parameters include piston speed parameters.

[0121] In an exemplary embodiment, the circuit breaker simulation device 600 further includes a model building module 640, which is used to build a magnetohydrodynamic arc simulation sub-model and a circuit breaker geometric sub-model based on the structural and electrical parameters of the circuit breaker; and to simplify the magnetohydrodynamic arc simulation sub-model and the circuit breaker geometric sub-model to obtain a first simulation model.

[0122] In an exemplary embodiment, the data transmission module 630 is further configured to convert the piston simulation operating parameters according to a preset first data format to obtain the converted piston simulation operating parameters; the preset first data format matches the data format of the second simulation model; and to convert the mechanical simulation operating parameters according to a preset second data format to obtain the converted mechanical simulation operating parameters; the preset second data format matches the data format of the second simulation model.

[0123] In an exemplary embodiment, the data transmission module 630 is further configured to forward the converted piston simulation operation parameters to the second simulation model based on a preset communication protocol, and synchronize the simulation timestamp; and to forward the converted mechanical simulation operation parameters to the first simulation model based on a preset communication protocol.

[0124] Each module in the circuit breaker simulation device 600 described above can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device in hardware form, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0125] In one exemplary embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 9 As shown, this computer device includes a processor, memory, input / output interfaces (I / O), 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 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 a circuit breaker simulation method.

[0126] Those skilled in the art will understand that Figure 9 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.

[0127] 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 steps in any of the circuit breaker simulation method embodiments described above.

[0128] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps in any of the circuit breaker simulation method embodiments described above.

[0129] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in any of the circuit breaker simulation method embodiments described above.

[0130] 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.

[0131] 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.

[0132] 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.

[0133] 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 circuit breaker simulation method, characterized in that, The method includes: Simulation steps: For each simulation time step, based on the constructed first simulation model, the arc extinguishing process of the circuit breaker's arc extinguishing chamber is simulated to obtain the piston simulation operating parameters. The first simulation model is used for the arc magnetohydrodynamic simulation of the circuit breaker. Based on the piston simulation operating parameters and the constructed second simulation model, the mechanical motion process of the circuit breaker is simulated to obtain the mechanical simulation operating parameters. The second simulation model is used for the mechanical motion simulation of the circuit breaker. Based on the mechanical simulation operating parameters, the boundary conditions of the first simulation model are updated, and the simulation steps are returned until the preset simulation termination conditions are met, thereby obtaining the circuit breaker simulation data.

2. The method according to claim 1, characterized in that, The first simulation model includes a magnetohydrodynamic arc simulation sub-model. Based on the constructed first simulation model, the arc extinguishing process of the circuit breaker's arc-extinguishing chamber is simulated to obtain piston simulation operating parameters, including: Based on the first simulation model and the mechanical simulation operation parameters of the previous simulation time step, the magnetohydrodynamic arc simulation sub-model is solved to obtain the arc extinguishing chamber simulation parameters; The pressure parameters of multiple preset piston grids are extracted from the simulation parameters of the arc-extinguishing chamber; The pressure parameters are converted into pressure parameters to obtain the piston simulation operation parameters.

3. The method according to claim 1, characterized in that, The piston simulation operating parameters include pressure parameters; the mechanical simulation operating parameters are obtained by simulating the mechanical movement process of the circuit breaker based on the piston simulation operating parameters and the constructed second simulation model, including: Based on the pressure parameters and the preset circuit breaker mechanism constraints, the mechanical dynamic sub-model in the second simulation model is solved to obtain the mechanical motion parameters; Extract the piston speed parameters from the mechanical motion parameters; The mechanical simulation operating parameters include the piston speed parameters.

4. The method according to claim 1, characterized in that, The first simulation model is constructed in the following ways: Based on the structural and electrical parameters of the circuit breaker, a magnetohydrodynamic arc simulation sub-model and a circuit breaker geometric sub-model are constructed. The magnetohydrodynamic arc simulation sub-model and the circuit breaker geometry sub-model are simplified to obtain the first simulation model.

5. The method according to any one of claims 1 to 4, characterized in that, The method further includes: The piston simulation operating parameters are converted according to a preset first data format to obtain the converted piston simulation operating parameters; the preset first data format is matched with the data format of the second simulation model. The mechanical simulation operation parameters are converted according to a preset second data format to obtain the converted mechanical simulation operation parameters; the preset second data format matches the data format of the second simulation model.

6. The method according to claim 5, characterized in that, The method further includes: Based on a preset communication protocol, the converted piston simulation running parameters are forwarded to the second simulation model, and the simulation timestamp is synchronized. Based on the preset communication protocol, the converted mechanical simulation operation parameters are forwarded to the first simulation model.

7. A circuit breaker simulation device, characterized in that, The device includes: The first simulation module is used for simulation steps: For each simulation time step, based on the constructed first simulation model, the arc extinguishing process in the arc extinguishing chamber of the circuit breaker is simulated to obtain the piston simulation operating parameters. The first simulation model is used for the arc magnetohydrodynamic simulation of the circuit breaker. The second simulation module is used to simulate the mechanical motion process of the circuit breaker based on the piston simulation operating parameters and the constructed second simulation model, and obtain the mechanical simulation operating parameters. The second simulation model is used for the mechanical motion simulation of the circuit breaker. The data transmission module is used to update the boundary conditions of the first simulation model according to the mechanical simulation operation parameters, return to the simulation step, and continue until the preset simulation end conditions are met to obtain the circuit breaker simulation data.

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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