Electric arc small current simulation control method and device, terminal equipment and storage medium

Abstract

The invention discloses an electric arc small current simulation control method and device, terminal equipment and a storage medium. The method comprises the steps of obtaining a geometric model of a high-voltage circuit breaker; on the basis of a dynamic simulation model and a high-current arc ohmic heat calculation formula, performing arc simulation operation on the geometric model; judging the running current in the electric arc simulation operation; if the running current is smaller than the current threshold value, re-executing the electric arc simulation operation on the geometric model based on a dynamic simulation model and a small-current electric arc ohmic heat calculation formula; otherwise, keeping the current operation. According to the invention, arc simulation of the high-voltage circuit breaker under different conditions is realized, operation loading of the high-voltage circuit breaker during arc generation can be studied through data obtained by simulation, and the safety of a power system is greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of switch arc simulation technology, and in particular to an arc low current simulation control method, device, terminal equipment and storage medium. Background Art

[0002] High-voltage circuit breakers are key equipment in power systems, and they are responsible for the important tasks of controlling the operation mode of the system and fault protection. When a short circuit or other fault occurs in the power system, in order to ensure the stable operation of other parts of the system, high-voltage circuit breakers are required to quickly cut off the faulty line. In this process, an arc will be generated between the arc contacts of the switching device. Whether the arc can be extinguished smoothly and in time is closely related to the normal operation of the power switching equipment and the reliable operation of the power system. However, the existing technology cannot simulate the arc, so it is impossible to study the problem of arc generation, resulting in low safety in the power system.

[0003] Therefore, there is an urgent need for an arc low current simulation control strategy to solve the problem of low safety of the power system caused by the inability to simulate the arc generated by the high-voltage circuit breaker. Summary of the invention

[0004] The embodiments of the present invention provide an arc low current simulation control method, device, terminal equipment and storage medium to solve the problem of low safety of the power system caused by the inability to simulate the arc generated by the high-voltage circuit breaker.

[0005] In order to solve the above problem, an embodiment of the present invention provides an arc low current simulation control method, comprising:

[0006] Obtaining a geometric model of a high voltage circuit breaker;

[0007] Based on the dynamic simulation model and the high current arc ohmic heat calculation formula, the arc simulation operation is performed on the geometric model;

[0008] Determining the operating current in the arc simulation operation;

[0009] If the operating current is less than the current threshold, the arc simulation operation is re-executed on the geometric model based on the dynamic simulation model and the small current arc ohmic heat calculation formula;

[0010] Otherwise, keep the current operation.

[0011] As an improvement of the above solution, after performing the arc simulation operation, the method further includes:

[0012] Get the temperature of the arc center area;

[0013] During the arc current zero-crossing period, the temperature of the arc center area is judged; wherein the arc center area is: the position from the static contact to the moving contact included in the center of the arc column;

[0014] If the temperature is lower than the preset temperature threshold, the current temperature is used as the input of the first arc extinguishing process operation, and the arc extinguishing process operation is repeatedly performed until the output temperature obtained by the arc extinguishing process operation is higher than the temperature threshold, and the arc extinguishing process operation is stopped;

[0015] If the temperature is greater than or equal to the temperature threshold, an arc simulation operation is performed based on the operating current; wherein, when the operating current is greater than or equal to the current threshold, an arc simulation operation is performed on the geometric model based on the dynamic simulation model and the large current arc ohmic heat calculation formula; when the operating current is less than the current threshold, an arc simulation operation is performed on the geometric model based on the dynamic simulation model and the small current arc ohmic heat calculation formula.

[0016] As an improvement of the above solution, the arc extinguishing process includes:

[0017] Judge the input;

[0018] If the input is less than the temperature threshold, the coefficient in the small current arc ohmic heat calculation formula is amplified according to a preset magnification, and based on the small current arc ohmic heat calculation formula after the coefficient is amplified and the dynamic simulation model, an arc simulation operation is performed on the geometric model, and the updated temperature of the arc center area collected by the arc simulation operation is used as the input of the next arc extinguishing processing operation;

[0019] If the input is greater than or equal to the temperature threshold, the arc extinguishing process is stopped.

[0020] As an improvement of the above solution, the arc simulation operation includes:

[0021] Get the initial temperature and initial pressure;

[0022] Under the constraints of the geometric model, the initial temperature and the initial pressure are input into a dynamic simulation model for simulation to obtain an arc radiation value of the geometric model;

[0023] Based on the arc ohmic heat calculation formula, the ohmic heat value of the geometric model is calculated; wherein the arc ohmic heat calculation formula includes: a large current arc ohmic heat calculation formula and a small current arc ohmic heat calculation formula;

[0024] Based on the ohmic heat value and the arc radiation value, the temperature of the arc center area is calculated.

[0025] As an improvement of the above solution, the high current arc ohmic heat calculation formula satisfies the following conditions:

[0026] J=σE 2

[0027] Where J is the ohmic heating value, σ is the gas conductivity, and E is the electric field strength of the corresponding grid.

[0028] As an improvement of the above solution, the small current arc ohmic heat calculation formula satisfies the following conditions:

[0029]

[0030] Where J is the ohmic heating value, I is the operating current, σ is the gas conductivity, θ is the coefficient, and s is the grid area.

[0031] As an improvement of the above solution, the dynamics simulation model satisfies the following conditions:

[0032]

[0033]

[0034] In the formula, z is the axial direction; r is the radial direction; θ is the angular direction; t is the time; ρ is the density; is the velocity vector; v is the radial velocity; ω is the axial velocity; μ l is the laminar viscosity; μ t is the turbulent viscosity; k l is the laminar thermal conductivity; k t is the turbulent thermal conductivity; U is the radiation energy; h is the enthalpy value; c p is the specific heat at constant pressure; p is the air pressure; σ is the electrical conductivity; is the electric potential; B θ is the angular component of magnetic induction intensity; J z is the axial current density; J r is the radial current density; μ0 is the vacuum magnetic permeability; is a sticky item; is the viscous diffusion term.

[0035] Accordingly, an embodiment of the present invention further provides an arc low current simulation control device, comprising: a data acquisition module, a data simulation module, a data judgment module, a first operation module and a second operation module;

[0036] The data acquisition module is used to acquire the geometric model of the high-voltage circuit breaker;

[0037] The data simulation module is used to perform arc simulation operations on the geometric model based on the dynamic simulation model and the high-current arc ohmic heat calculation formula;

[0038] The data judgment module is used to judge the operating current in the arc simulation operation;

[0039] The first operation module is used to re-execute the arc simulation operation on the geometric model based on the dynamic simulation model and the small current arc ohmic heat calculation formula if the operating current is less than the current threshold;

[0040] The second operation module is used for maintaining the current operation otherwise.

[0041] Correspondingly, an embodiment of the present invention also provides a computer terminal device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, and when the processor executes the computer program, it implements an arc low current simulation control method as described in the present invention.

[0042] Correspondingly, an embodiment of the present invention further provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute an arc low current simulation control method as described in the present invention.

[0043] As can be seen from the above, the present invention has the following beneficial effects:

[0044] The present invention provides an arc low current simulation control method, which obtains a geometric model of a high-voltage circuit breaker; performs an arc simulation operation on the geometric model based on a dynamic simulation model and a large current arc ohmic heat calculation formula; judges the operating current in the arc simulation operation; if the operating current is less than a current threshold, the arc simulation operation is re-executed on the geometric model based on the dynamic simulation model and the small current arc ohmic heat calculation formula; otherwise, the current operation is maintained. The present invention realizes arc simulation of high-voltage circuit breakers under different conditions, and can study the operation loading of high-voltage circuit breakers when arcs are generated through the data obtained by simulation, which greatly improves the safety of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a flow chart of a method for simulating and controlling arc low current provided by an embodiment of the present invention;

[0046] Figure 2 It is a structural schematic diagram of an arc low current simulation control device provided by an embodiment of the present invention;

[0047] Figure 3 This is a schematic diagram of the structure of a terminal device provided by an embodiment of the present invention;

[0048] Figure 4It is a schematic diagram of simulation results of a high-voltage circuit breaker provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] Embodiment 1

[0051] See also Figure 1 , Figure 1 FIG. 1 is a flow chart of a method for simulating a small arc current control according to an embodiment of the present invention. Figure 1 As shown, this embodiment includes steps 101 to 105, and each step is specifically as follows:

[0052] Step 101: Obtain a geometric model of a high-voltage circuit breaker.

[0053] In this embodiment, a two-dimensional axisymmetric geometric model of the high-voltage circuit breaker (ie, the geometric model described in the present invention) is firstly established to simulate the arc burning process under the long arc burning condition of 10KA AC current at 50HZ.

[0054] Step 102: Based on the dynamic simulation model and the high current arc ohmic heat calculation formula, perform arc simulation operation on the geometric model.

[0055] In this embodiment, based on a general two-dimensional arc magnetohydrodynamic simulation model (i.e., the dynamic simulation model described in the present invention), the initial temperature and pressure are given as input parameters under a given high-voltage circuit breaker geometric model structure. The initial pressure is based on the actual equipment inflation reference pressure, and generally there are several commonly used pressures such as 0.6, 0.7, and 0.8 MPa. Initial temperature: outside the arc area, also known as ambient temperature, is set to 300K; based on the initial size of the arc current, the arc radius is calculated according to the empirical formula to obtain the arc area. We identify the horizontal range: from the static contact to the moving contact, and the vertical range: from the axis of the symmetry axis to the arc radius as the arc area. Then set the initial temperature of the arc area to 20000K.

[0056] In a specific embodiment, the initial pressure is based on the actual equipment inflation reference pressure, generally 0.6, 0.7, 0.8 MPa and other commonly used pressures. Initial temperature: outside the arc area, also known as the ambient temperature, is set to 300K; according to the initial moment of the arc current, the arc radius is calculated according to the empirical formula to obtain the arc area, and then the initial temperature of the arc column center area of ​​the arc area is set to 20000K, and the rest of the arc area is set to 10000K.

[0057] In this embodiment, the high current arc ohmic heat calculation formula satisfies the following conditions:

[0058] J=σE 2

[0059] Where J is the ohmic heating value, σ is the gas conductivity, and E is the electric field strength of the corresponding grid.

[0060] In this embodiment, the dynamics simulation model satisfies the following conditions:

[0061]

[0062] In the formula, z is the axial direction; r is the radial direction; θ is the angular direction; t is the time; ρ is the density; is the velocity vector; v is the radial velocity; ω is the axial velocity; μ l is the laminar viscosity; μ t is the turbulent viscosity; k l is the laminar thermal conductivity; k t is the turbulent thermal conductivity; U is the radiation energy; h is the enthalpy value; c p is the specific heat at constant pressure; p is the air pressure; σ is the electrical conductivity; is the electric potential; B θ is the angular component of magnetic induction intensity; J z is the axial current density; J r is the radial current density; μ0 is the vacuum magnetic permeability; is a sticky item; is the viscous diffusion term.

[0063] In a specific embodiment, the two-dimensional arc magnetohydrodynamic simulation model satisfies the following conditions: The basic equation is as follows:

[0064] a) Mass conservation equation:

[0065]

[0066] b) Axial momentum conservation equation:

[0067]

[0068] c) Radial momentum conservation equation:

[0069]

[0070] d) Energy conservation equation:

[0071]

[0072] e) Electromagnetic field equations:

[0073]

[0074] Step 103: Determine the operating current in the arc simulation operation.

[0075] Step 104: If the operating current is less than the current threshold, the arc simulation operation is re-executed on the geometric model based on the dynamic simulation model and the small current arc ohmic heat calculation formula.

[0076] In this embodiment, the small current arc ohmic heat calculation formula satisfies the following conditions:

[0077]

[0078] Where J is the ohmic heating value, I is the operating current, σ is the gas conductivity, θ is the coefficient, and s is the grid area.

[0079] It can be understood that after the first half-wave of the current, when the current drops to 500A (the current threshold of the present invention), the arc shape is as follows: Figure 4 As shown. We believe that at this time, the high-voltage circuit breaker enters the low current mode. This moment is recorded as state 1. It can be seen that the arc column is very thin at this time. At this time, the low current arc ohmic heat calculation formula is replaced to continue the simulation.

[0080] Step 105: Otherwise, keep the current operation.

[0081] In this embodiment, after the arc simulation operation is performed, the method further includes:

[0082] Get the temperature of the arc center area;

[0083] During the arc current zero-crossing period, the temperature of the arc center area is judged; wherein the arc center area is: the position from the static contact to the moving contact included in the center of the arc column;

[0084] If the temperature is lower than the preset temperature threshold, the current temperature is used as the input of the first arc extinguishing process operation, and the arc extinguishing process operation is repeatedly performed until the output temperature obtained by the arc extinguishing process operation is higher than the temperature threshold, and the arc extinguishing process operation is stopped;

[0085] If the temperature is greater than or equal to the temperature threshold, an arc simulation operation is performed based on the operating current; wherein, when the operating current is greater than or equal to the current threshold, an arc simulation operation is performed on the geometric model based on the dynamic simulation model and the large current arc ohmic heat calculation formula; when the operating current is less than the current threshold, an arc simulation operation is performed on the geometric model based on the dynamic simulation model and the small current arc ohmic heat calculation formula.

[0086] It should be noted that during the entire arc current zero-crossing period, the arc is checked to see if it remains burning. If it is burning, the arc current ohmic heat calculation formula is changed back to the classic formula after the current reverses to 500A; if arc extinction occurs, the coefficient θ in the small current arc ohmic heat calculation formula is magnified by 1.2 times, and the simulation is re-simulated in state 1, and this process is repeated until the arc extinction phenomenon no longer occurs. We believe that the arc extinction phenomenon occurs when the temperature of any section of the arc column center from the static contact to the moving contact is lower than 6000K (the temperature threshold described in the present invention).

[0087] In this embodiment, the arc extinguishing process includes:

[0088] Judge the input;

[0089] If the input is less than the temperature threshold, the coefficient in the small current arc ohmic heat calculation formula is amplified according to a preset magnification, and based on the small current arc ohmic heat calculation formula after the coefficient is amplified and the dynamic simulation model, an arc simulation operation is performed on the geometric model, and the updated temperature of the arc center area collected by the arc simulation operation is used as the input of the next arc extinguishing processing operation;

[0090] If the input is greater than or equal to the temperature threshold, the arc extinguishing process is stopped.

[0091] In this embodiment, the arc simulation operation includes:

[0092] Get the initial temperature and initial pressure;

[0093] Under the constraints of the geometric model, the initial temperature and the initial pressure are input into a dynamic simulation model for simulation to obtain an arc radiation value of the geometric model;

[0094] Based on the arc ohmic heat calculation formula, the ohmic heat value of the geometric model is calculated; wherein the arc ohmic heat calculation formula includes: a large current arc ohmic heat calculation formula and a small current arc ohmic heat calculation formula;

[0095] Based on the ohmic heat value and the arc radiation value, the temperature of the arc center area is calculated.

[0096] In a specific embodiment, arc radiation is one of the main ways to dissipate arc energy. Generally speaking, since the heat carried away by air convection is much lower than that carried away by radiation, the arc ohmic heat minus the arc radiation can be used to obtain the heat generated by the arc at this moment. This heat determines the trend and rate of change of the arc temperature. Therefore, after obtaining the heat by subtracting the arc radiation value from the ohmic heat value, the temperature of the center area of ​​the arc can be calculated based on the heat.

[0097] In a specific embodiment, in addition to the initial temperature and initial pressure, it is also necessary to obtain arc current, opening speed, and gas physical property parameters.

[0098] See also Figure 2 , Figure 2 1 is a schematic diagram of the structure of an arc low current simulation control device provided by an embodiment of the present invention, comprising: a data acquisition module 201, a data simulation module 202, a data judgment module 203, a first operation module 204 and a second operation module 205;

[0099] The data acquisition module is used to acquire the geometric model of the high-voltage circuit breaker;

[0100] The data simulation module is used to perform arc simulation operations on the geometric model based on the dynamic simulation model and the high-current arc ohmic heat calculation formula;

[0101] The data judgment module is used to judge the operating current in the arc simulation operation;

[0102] The first operation module is used to re-execute the arc simulation operation on the geometric model based on the dynamic simulation model and the small current arc ohmic heat calculation formula if the operating current is less than the current threshold;

[0103] The second operation module is used for maintaining the current operation otherwise.

[0104] It can be understood that the above-mentioned system item embodiment corresponds to the method item embodiment of the present invention, which can implement the arc low current simulation control method provided by any one of the above-mentioned method item embodiments of the present invention.

[0105] This embodiment obtains the geometric model of the high-voltage circuit breaker; performs arc simulation operation on the geometric model based on the dynamic simulation model and the large current arc ohmic heat calculation formula; judges the operating current in the arc simulation operation; if the operating current is less than the current threshold, the arc simulation operation is re-executed on the geometric model based on the dynamic simulation model and the small current arc ohmic heat calculation formula; otherwise, the current operation is maintained. The present invention realizes arc simulation of high-voltage circuit breakers under different conditions, and can study the operation loading of high-voltage circuit breakers when arcs are generated through the data obtained by simulation, which greatly improves the safety of the power system.

[0106] Embodiment 2

[0107] See also Figure 3 , Figure 3 It is a schematic diagram of the structure of a terminal device provided in one embodiment of the present invention.

[0108] A terminal device of this embodiment includes: a processor 301, a memory 302, and a computer program stored in the memory 302 and executable on the processor 301. When the processor 301 executes the computer program, the steps of the above-mentioned arc low current simulation control method in the embodiment are implemented, for example Figure 1 Alternatively, when the processor executes the computer program, the functions of each module in the above-mentioned device embodiments are realized, for example: Figure 2 All modules of the arc low current simulation control device are shown.

[0109] In addition, an embodiment of the present invention further provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the arc low current simulation control method described in any of the above embodiments.

[0110] Those skilled in the art will understand that the schematic diagram is merely an example of a terminal device and does not constitute a limitation on the terminal device. The terminal device may include more or fewer components than shown in the diagram, or a combination of certain components, or different components. For example, the terminal device may also include input and output devices, network access devices, buses, etc.

[0111] The processor 301 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The processor 301 is the control center of the terminal device, and uses various interfaces and lines to connect various parts of the entire terminal device.

[0112] The memory 302 can be used to store the computer program and / or module. The processor 301 implements various functions of the terminal device by running or executing the computer program and / or module stored in the memory and calling the data stored in the memory 302. The memory 302 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the mobile phone (such as audio data, a phone book, etc.), etc. In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0113] Wherein, if the module / unit integrated in the terminal device is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Wherein, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium, etc.

[0114] It should be noted that the device embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. In addition, in the accompanying drawings of the device embodiments provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, which may be specifically implemented as one or more communication buses or signal lines. A person of ordinary skill in the art may understand and implement it without paying any creative effort.

[0115] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method for simulating and controlling arc low current, characterized in that: include: Obtaining a geometric model of a high voltage circuit breaker; Based on the dynamic simulation model and the high current arc ohmic heat calculation formula, the arc simulation operation is performed on the geometric model; Determining the operating current in the arc simulation operation; If the operating current is less than the current threshold, the arc simulation operation is re-executed on the geometric model based on the dynamic simulation model and the small current arc ohmic heat calculation formula; Otherwise, keep the current operation.

2. The arc low current simulation control method according to claim 1, characterized in that: After the arc simulation operation is performed, the method further includes: Get the temperature of the arc center area; During the arc current zero-crossing period, the temperature of the arc center area is judged; wherein the arc center area is: the position from the static contact to the moving contact included in the center of the arc column; If the temperature is lower than the preset temperature threshold, the current temperature is used as the input of the first arc extinguishing process operation, and the arc extinguishing process operation is repeatedly performed until the output temperature obtained by the arc extinguishing process operation is higher than the temperature threshold, and the arc extinguishing process operation is stopped; If the temperature is greater than or equal to the temperature threshold, an arc simulation operation is performed based on the operating current; wherein, when the operating current is greater than or equal to the current threshold, an arc simulation operation is performed on the geometric model based on the dynamic simulation model and the large current arc ohmic heat calculation formula; when the operating current is less than the current threshold, an arc simulation operation is performed on the geometric model based on the dynamic simulation model and the small current arc ohmic heat calculation formula.

3. The arc low current simulation control method according to claim 2, characterized in that: The arc extinguishing process comprises: Judge the input; If the input is less than the temperature threshold, the coefficient in the small current arc ohmic heat calculation formula is amplified according to a preset magnification, and based on the small current arc ohmic heat calculation formula after the coefficient is amplified and the dynamic simulation model, an arc simulation operation is performed on the geometric model, and the updated temperature of the arc center area collected by the arc simulation operation is used as the input of the next arc extinguishing processing operation; If the input is greater than or equal to the temperature threshold, the arc extinguishing process is stopped.

4. The arc low current simulation control method according to any one of claims 1 to 3, characterized in that: The arc simulation operation comprises: Get the initial temperature and initial pressure; Under the constraints of the geometric model, the initial temperature and the initial pressure are input into a dynamic simulation model for simulation to obtain an arc radiation value of the geometric model; Based on the arc ohmic heat calculation formula, the ohmic heat value of the geometric model is calculated; wherein the arc ohmic heat calculation formula includes: a large current arc ohmic heat calculation formula and a small current arc ohmic heat calculation formula; Based on the ohmic heat value and the arc radiation value, the temperature of the arc center area is calculated.

5. The arc low current simulation control method according to claim 4, characterized in that: The high current arc ohmic heat calculation formula meets the following conditions: J=σE 2 Where J is the ohmic heating value, σ is the gas conductivity, and E is the electric field strength of the corresponding grid.

6. The arc low current simulation control method according to claim 4, characterized in that: The small current arc ohmic heat calculation formula meets the following conditions: Where J is the ohmic heating value, I is the operating current, σ is the gas conductivity, θ is the coefficient, and s is the grid area.

7. The arc low current simulation control method according to claim 4, characterized in that: The dynamics simulation model meets the following conditions: In the formula, z is the axial direction; r is the radial direction; θ is the angular direction; t is the time; ρ is the density; is the velocity vector; v is the radial velocity; ω is the axial velocity; μ l is the laminar viscosity; μ t is the turbulent viscosity; k l is the laminar thermal conductivity; k t is the turbulent thermal conductivity; U is the radiation energy; h is the enthalpy value; c p is the specific heat at constant pressure; p is the air pressure; σ is the electrical conductivity; is the electric potential; B θ is the angular component of magnetic induction intensity; J z is the axial current density; J r is the radial current density; μ0 is the vacuum magnetic permeability; is a sticky item; is the viscous diffusion term.

8. An arc low current simulation control device, characterized in that: include: A data acquisition module, a data simulation module, a data judgment module, a first operation module and a second operation module; The data acquisition module is used to acquire the geometric model of the high-voltage circuit breaker; The data simulation module is used to perform arc simulation operations on the geometric model based on the dynamic simulation model and the high-current arc ohmic heat calculation formula; The data judgment module is used to judge the operating current in the arc simulation operation; The first operation module is used to re-execute the arc simulation operation on the geometric model based on the dynamic simulation model and the small current arc ohmic heat calculation formula if the operating current is less than the current threshold; The second operation module is used for maintaining the current operation otherwise.

9. A computer terminal device, characterized in that: The method comprises a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, wherein when the processor executes the computer program, an arc low current simulation control method as described in any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored computer program, wherein when the computer program is executed, the device where the computer-readable storage medium is located is controlled to execute an arc low current simulation control method as described in any one of claims 1 to 7.

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