CN-121997653-A - Arc simulation method for arc extinguishing chamber, electronic device, storage medium and program product

CN121997653ACN 121997653 ACN121997653 ACN 121997653ACN-121997653-A

Abstract

The application provides an arc simulation method of an arc extinguishing chamber, electronic equipment, a storage medium and a program product. The arc simulation method comprises the steps of constructing a control equation for arc simulation of the arc extinguishing chamber, wherein the control equation comprises a mass conservation equation, a momentum conservation equation and an energy conservation equation. Based on the lattice Boltzmann method, a mass conservation equation and a momentum conservation equation are taken as simulation targets, and the density and the speed of a flow field corresponding to the arc extinguishing chamber in each time step are updated in the arc simulation process of the arc extinguishing chamber. And solving an energy conservation equation based on a finite difference method, and updating the temperature of the flow field at each time step. And based on the density, speed and temperature corresponding to each time step of the flow field, the arc simulation of the arc extinguishing chamber is completed. The technical scheme of the application realizes the three-dimensional arc simulation of the arc extinguishing chamber, and improves the speed and the precision of the simulation.

Inventors

ZHONG JIANYING
HAO LIUCHENG
SONG YUNLEI
WANG WEIWEI
WANG JIE
ZHU XUANMING
XU WEI
LI MIAOXIN
WANG ZHIJUN
Liu Caixi
ZHANG HAO
WANG ZHENJIANG
LI XIAOBAO
ZHANG YOUPENG

Assignees

中国电气装备集团科学技术研究院有限公司
平高集团有限公司

Dates

Publication Date: 20260508
Application Date: 20260120

Claims (10)

1. An arc simulation method of an arc extinguishing chamber is characterized by comprising the following steps: Constructing a control equation for arc extinguishing chamber arc simulation, wherein the control equation comprises a mass conservation equation, a momentum conservation equation and an energy conservation equation; based on the lattice Boltzmann method, the mass conservation equation and the momentum conservation equation are taken as simulation targets, and the density and the speed of a flow field corresponding to the arc extinguishing chamber in each time step are updated in the arc simulation process of the arc extinguishing chamber; solving the energy conservation equation based on a finite difference method, and updating the temperature of the flow field at each time step; And based on the density, the speed and the temperature of the flow field corresponding to each time step, completing arc simulation of the arc extinguishing chamber.
2. The arc simulation method of an arc extinguishing chamber according to claim 1, wherein the lattice boltzmann method is based on the mass conservation equation and the momentum conservation equation as simulation targets, and updating the density and the speed of a flow field of the arc extinguishing chamber at each time step in the arc simulation process of the arc extinguishing chamber, comprising: Discretizing a geometric model of the arc extinguishing chamber into grid cells based on a lattice boltzmann model, the grid cells comprising a plurality of grid points; determining a unit conversion coefficient of each lattice point from a physical unit of the geometric model to a lattice unit, and converting physical quantities of all lattice points from the physical unit to the lattice unit according to the unit conversion coefficient; and carrying out local collision and migration on each grid point so as to update the density and the speed of the flow field at each time step.
3. The arc simulation method of an arc chute according to claim 2, wherein said locally impinging and migrating at each of said grid points to update the density and velocity of said flow field at each of said time steps comprises: carrying out local collision on each lattice point to obtain a distribution function after collision; based on the distribution function after collision, each lattice point is migrated to an adjacent lattice point along the discrete speed direction specified by the lattice Boltzmann model, and the migrated distribution function is obtained; And updating the density and the speed of the flow field at each time step based on the migrated distribution function.
4. The arc simulation method of an arc chute according to claim 2, wherein the determining a unit conversion coefficient of each of the lattice points from a physical unit of a geometric model to a lattice unit comprises: And determining the unit conversion coefficient according to Mach number similarity criteria and Reynolds number similarity criteria, wherein the unit conversion coefficient comprises a characteristic length conversion coefficient, a characteristic time conversion coefficient, a characteristic quality conversion coefficient and a characteristic temperature conversion coefficient.
5. The arc simulation method of the arc extinguishing chamber according to claim 1, wherein the solving the energy conservation equation based on the finite difference method updates the temperature of the flow field at each time step, comprising: discretizing the time derivative and the space derivative of the energy conservation equation; Solving the energy conservation equation after the dispersion to update the temperature of the flow field at each time step.
6. The arc simulation method of the arc chute according to claim 5, wherein the discretizing the time derivative of the energy conservation equation comprises discretizing the time derivative of the energy conservation equation in a first order Euler format; The discretizing of the spatial derivative of the energy conservation equation includes processing a convection term of the energy conservation equation in a windward format, and processing a heat conduction term and a viscous dissipation term of the energy conservation equation in a second-order center difference format.
7. The arc simulation method of an arc chute according to claim 2, wherein the lattice boltzmann model employs a pressure-based regularization format.
8. An electronic device comprising a processor and a memory, wherein the memory has stored therein at least one instruction or at least one program, the at least one instruction or the at least one program being loaded and executed by the processor to implement the arc simulation method of the arc chute of any of claims 1-7.
9. A computer readable storage medium having stored therein at least one instruction or at least one program loaded and executed by a processor to implement the arc simulation method of an arc chute according to any one of claims 1-7.
10. A computer program product comprising a computer program or instructions which, when executed by a processor, implements the arc simulation method of an arc chute according to any one of claims 1-7.

Description

Arc simulation method for arc extinguishing chamber, electronic device, storage medium and program product Technical Field The present application relates to the field of arc simulation of an arc extinguishing chamber, and in particular, to an arc simulation method, an electronic device, a storage medium, and a program product for an arc extinguishing chamber. Background The traditional design method of the high-voltage switch product can consume huge manpower and material resources by modifying a prototype after repeated test, thereby not only increasing the research and development cost, but also having longer research and development period and seriously affecting the market competitiveness. Therefore, in order to improve the design performance of the product and shorten the development period, the simulation technology is increasingly applied to the development of the high-voltage switch. Among them, a sulfur hexafluoride circuit breaker (abbreviated as SF6 circuit breaker) is a circuit breaker which is used in the electric industry and has high insulation strength and high interruption of pressurized SF6 gas to extinguish an arc. During interruption of the current by the circuit breaker, the arc of the SF6 circuit breaker is strongly accelerated by the pressure gradient, resulting in heavy turbulence and reaching extremely high temperatures above 15000K. Thus, there are sites of heavy momentum, energy and mass transfer in the arc chute of the circuit breaker, the microscale and mesoscale flow fields in SF6 circuit breakers, and the energy transfer remain in the black box. Numerical simulation has become an important tool in studying the arc flow process in order to provide a clear understanding of the dynamic process of arc generation and extinction, and to keep track of the details of various aspects of the arc flow. Since the 90 s of the 20 th century, with the development of field analysis technology and the improvement of computer performance, the numerical simulation method is started to be applied to simulation analysis of high-voltage switching equipment at home and abroad. The universities of british litha, ABB, GE and british are in the front of switch arc simulation, and korean LG company is also developing the study in this respect. ABB, GE and philips university are capable of arc chute airflow fields and arc simulations using parallel computing techniques. At home, the arc extinguishing chamber arc and the airflow field can be simulated by using parallel computing technology. Large domestic high-voltage switch enterprises are also developing computer simulation research work for breaking arc of circuit breakers. Early simulation studies were mainly conducted on single physical field characteristic parameters. However, the operation condition of the high-voltage switch equipment is complex, and the high-voltage switch equipment relates to a plurality of physical field problems such as structural mechanical properties, electromagnetic fields, temperature fields, air flow fields and the like. The analysis method of the single physical field cannot comprehensively evaluate the operation condition of the high-voltage switch, and even the fault conclusion can be obtained by considering the operation condition. Through the multi-physical field coupling simulation, not only can a real and reliable analysis result be obtained, but also the design of the high-voltage switch is guided through the multi-physical field simulation, and the optimal scheme is subjected to test verification and improvement, so that the research and development cost can be greatly reduced, the research and development period is shortened, and the method has great significance on the research of the high-voltage switch. For arc simulation inside the high voltage switch arc-extinguishing chamber, the numerical modeling of existing turbulent arcs is almost entirely based on the traditional two-dimensional (2D) nano-stokes equation (navier-stokes equation, abbreviated as N-S equation), especially using commercial software. Since 1994, the axisymmetric turbulent nozzle arcs in gas circuit breakers were studied by the university of foreign philips through navier-stokes equation, and the pluronic (prandtl) mixed length model was found to be suitable for studying turbulent arcs because it was simple and successful when applied to turbulent circular jets. Based on a compressible 2D navier-stokes equation, the subsequent domestic and foreign researchers assume local thermodynamic equilibrium, and the model considers joule heat, radiation, lorentz force, arc wall interaction and actual gas effect and is applied to researching the arc phenomenon of high-voltage, medium-voltage and low-voltage circuit breakers. However, on the one hand, arc characteristics change drastically in hundreds of nanoseconds due to the factors involved in the high voltage switching arc chamber opening process, such as plasma turbulence, radiation, nozzle ablat