Numerical simulation and quantitative evaluation method and system for breaking performance of low-voltage circuit breaker

Abstract

The invention discloses a numerical simulation and quantitative evaluation method and system for the breaking performance of a low-voltage circuit breaker, and belongs to the technical field of power tests. The method provided by the invention comprises the following steps: acquiring an electrical parameter of a low-voltage circuit breaker in a breaking process, determining a change rule of the electrical parameter in the breaking process, and dividing a growth interval of an arc according to the change rule; establishing a simulation equation of the breaking process according to the growth interval, and performing numerical simulation and solving on the breaking performance of the low-voltage circuit breaker based on the simulation equation; and quantizing the breaking performance based on a numerical simulation solution result. According to the method, the problems that breaking arc mutation nodes of the low-voltage circuit breaker are not clear and only qualitative detection is carried out can be solved, the change rule of electrical parameters in the breaking process is analyzed, an arc growth interval is divided, comprehensive characterization parameters of breaking performance are provided, and quantitative evaluation of the breaking performance of the circuit breaker is carried out.

Description

Technical Field

[0001] The present invention relates to the technical field of power tests, and more specifically, to a method and system for numerical simulation and quantitative evaluation of the breaking performance of a low-voltage circuit breaker. Background Art

[0002] The breaking test is an important test in the type test of low-voltage circuit breakers, which is used to test whether the equipment can quickly and reliably break the short-circuit fault current. After the low-voltage circuit breaker assembled in the complete switchgear undergoes a large current test of 10 kA or 15 kA, it suffers from destructive damage or even explodes. The current passing judgment basis for the breaking test is that the operating mechanism can work normally after the test, and the moving and static contacts are in the closed state after closing. There is no analysis of the sudden change nodes of the arc movement during the breaking of the low-voltage circuit breaker, no method for judging the arc movement state of the switchgear is proposed, and there is no quantitative evaluation of the breaking performance of the low-voltage circuit breaker.

[0003] There is a problem of chaotic quality in low-voltage circuit breakers. The arc occurs quickly during short-circuit breaking, causing serious damage to the circuit breaker body. It is difficult to accurately evaluate the quality of the equipment breaking performance through simple qualitative inspection of the equipment state after the test. It is urgent to carry out numerical simulation and quantitative evaluation of the breaking performance of low-voltage circuit breakers. Summary of the Invention

[0004] In view of the above problems, the present invention proposes a method for numerical simulation and quantitative evaluation of the breaking performance of a low-voltage circuit breaker, including:

[0005] Obtain the electrical parameters during the breaking process of the low-voltage circuit breaker, determine the change law of the electrical parameters during the breaking process, and divide the growth interval of the arc according to the change law;

[0006] Establish a simulation equation for the breaking process based on the growth interval, and based on the simulation equation, perform numerical simulation and solution on the breaking performance of the low-voltage circuit breaker;

[0007] Quantify the breaking performance based on the numerical simulation solution result.

[0008] Optionally, establishing a simulation equation for the breaking process includes:

[0009] Establish a simulation equation for the stage from power-on to arc initiation, a simulation equation for the stage when the arc is generated and stagnates, a simulation equation for the stage from the start of arc movement to before entering the arc extinguishing grid, and a simulation equation for the stage from the arc entering the arc extinguishing grid to arc extinction.

[0010] Optionally, performing numerical simulation and solution on the breaking performance of the low-voltage circuit breaker includes:

[0011] Extract the closing phase angle under the most severe conditions of the experiment, and equally spaced select the values of the closing phase angle within the range of [0°, 180°], substitute them into the numerical simulation equation, and perform numerical simulation and solution.

[0012] Optionally, the numerical simulation solution results include:

[0013] The current and voltage waveforms during the high-current breaking process.

[0014] Optionally, the influencing factors for quantifying the breaking performance under different scenarios include:

[0015] Joule integral, current peak value, and arcing energy.

[0016] Optionally, quantifying the breaking performance includes:

[0017] In the scenario where the electromagnetic coil and arc extinguishing grid are increased, calculate the per-unit values of the reduction in Joule integral and arcing energy, and assuming that the weights of the Joule integral and arcing energy are both 0.5, calculate the degree of reduction in the breaking performance characterized by the increase in the high-current hazard.

[0018] On the other hand, the present invention also proposes a numerical simulation and quantitative evaluation system for the breaking performance of a low-voltage circuit breaker, including:

[0019] An initial unit for obtaining the electrical parameters of the breaking process of the low-voltage circuit breaker, determining the variation law of the electrical parameters of the breaking process, and dividing the growth interval of the arc according to the variation law;

[0020] A simulation solution unit for establishing a simulation equation of the breaking process based on the growth interval, and performing numerical simulation and solution on the breaking performance of the low-voltage circuit breaker based on the simulation equation;

[0021] A quantification unit for quantifying the breaking performance based on the numerical simulation solution results.

[0022] Optionally, establishing the simulation equation of the breaking process includes:

[0023] Establish a simulation equation for the stage from power-on to before arcing, a simulation equation for the stage when the arc is generated and stagnates, a simulation equation for the stage when the arc starts to move to before entering the arc extinguishing grid, and a simulation equation for the stage when the arc enters the arc extinguishing grid to arc extinction.

[0024] Optionally, performing numerical simulation and solution on the breaking performance of the low-voltage circuit breaker includes:

[0025] Extract the closing phase angle under the most severe conditions of the experiment, and equally spaced select the values of the closing phase angle within the range of [0°, 180°], substitute them into the numerical simulation equation, and perform numerical simulation and solution.

[0026] Optionally, the numerical simulation solution results include:

[0027] The current and voltage waveforms during high - current breaking.

[0028] Optionally, the influencing factors for quantifying the breaking performance under different scenarios include:

[0029] Joule integral, current peak value, and arcing energy.

[0030] Optionally, quantifying the breaking performance includes:

[0031] In the scenario where the electromagnetic coil and arc - extinguishing grid are increased, calculate the per - unit values of the reduction in Joule integral and arcing energy, and assume that the weights of the Joule integral and arcing energy are both 0.5, and calculate the degree of reduction in the breaking performance characterized by the increase in high - current hazards.

[0032] On the other hand, the present invention also provides a computing device, including: one or more processors;

[0033] The processor is used to execute one or more programs;

[0034] When the one or more programs are executed by the one or more processors, the method as described above is implemented.

[0035] On the other hand, the present invention also provides a computer - readable storage medium, on which a computer program is stored, and when the computer program is executed, the method as described above is implemented.

[0036] Compared with the prior art, the beneficial effects of the present invention are:

[0037] The present invention provides a method for numerical simulation and quantitative evaluation of the breaking performance of a low - voltage circuit breaker, including: obtaining the electrical parameters during the breaking process of the low - voltage circuit breaker, determining the variation law of the electrical parameters during the breaking process, and dividing the growth interval of the arc according to the variation law; establishing a simulation equation for the breaking process based on the growth interval, and based on the simulation equation, performing numerical simulation and solution on the breaking performance of the low - voltage circuit breaker; quantifying the breaking performance based on the numerical simulation solution results. The present invention can solve the problems of unclear mutation nodes of the breaking arc of the low - voltage circuit breaker and only qualitative detection, analyze the variation law of the electrical parameters during the breaking process, divide the arc growth interval, propose a comprehensive characterization parameter for the breaking performance, and carry out quantitative evaluation of the breaking performance of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a flowchart of the method of the present invention;

[0039] Figure 2 is a schematic diagram of the arc movement of the low - voltage circuit breaker in the embodiment of the method of the present invention;

[0040] Figure 3 It is the flowchart of the large current breaking simulation of the low-voltage circuit breaker in the method embodiment of the present invention;

[0041] Figure 4 It is the effect diagram of the numerical simulation breaking current and voltage under different closing phase angles in the method embodiment of the present invention;

[0042] Figure 5 It is the effect diagram of the large current hazard assessment of the low-voltage circuit breaker under different grid sheets in the method embodiment of the present invention;

[0043] Figure 6 It is the structure diagram of the system of the present invention. Detailed implementation manners

[0044] Now, refer to the accompanying drawings to introduce the exemplary embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely, and to fully convey the scope of the present invention to those skilled in the art. The terms in the exemplary embodiments shown in the accompanying drawings are not limitations on the present invention. In the drawings, the same units / components use the same reference numerals.

[0045] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the ordinary meaning understood by those skilled in the art. In addition, it can be understood that the terms defined in the commonly used dictionary should be understood to have a meaning consistent with the context of their related fields, and should not be understood as idealized or overly formal meanings.

[0046] Embodiment 1:

[0047] The present invention proposes a method for numerical simulation and quantitative evaluation of the breaking performance of a low-voltage circuit breaker, as Figure 1 shown, including:

[0048] Step 1: Obtain the electrical parameters of the breaking process of the low-voltage circuit breaker, determine the variation law of the electrical parameters of the breaking process, and divide the growth interval of the arc according to the variation law;

[0049] Step 2: Establish a simulation equation for the breaking process according to the growth interval, and based on the simulation equation, perform numerical simulation and solution on the breaking performance of the low-voltage circuit breaker;

[0050] Step 3: Quantify the breaking performance based on the numerical simulation solution results.

[0051] Among them, establishing the simulation equation for the breaking process includes:

[0052] Establish the simulation equations for the stage from energization to arc ignition, the stage of arc generation and stagnation, the stage from the start of arc movement to before entering the arc extinguishing grid, and the stage from the arc entering the arc extinguishing grid to arc extinction.

[0053] Among them, numerical simulation and solution of the breaking performance of the low-voltage circuit breaker include:

[0054] Extract the closing phase angle under the most severe experimental conditions, and equally spaced select the values of the closing phase angle in the interval [0°, 180°], substitute them into the numerical simulation equation, and perform numerical simulation and solution.

[0055] Among them, the results of numerical simulation solution include:

[0056] The current-voltage waveforms during high-current breaking.

[0057] Among them, the influencing factors for quantifying the breaking performance in different scenarios include:

[0058] Joule integral, current peak value, and arc energy.

[0059] Among them, quantifying the breaking performance includes:

[0060] In the scenario where the electromagnetic coil and the arc extinguishing grid are increased, calculate the per-unit values of the reduction in Joule integral and arc energy, and assume that the weights of the Joule integral and arc energy are both 0.5, and calculate the degree of reduction in breaking performance characterized by the increase in high-current hazards.

[0061] The following is a further description in combination with specific cases of the present invention:

[0062] In a numerical simulation method for the breaking performance of a low-voltage circuit breaker of the present invention, analyze the variation law of electrical parameters during the high-current breaking process of the low-voltage circuit breaker, divide the arc growth interval, establish the numerical simulation equation for the breaking process, analyze the influence of the closing phase angle on the breaking process, and extract the closing phase angle under the most severe experimental conditions.

[0063] In the described numerical simulation method for the breaking performance of a low-voltage circuit breaker, establish a breaking simulation numerical equation including 4 stages: from energization to before arc ignition, arc generation and stagnation, from the start of arc movement to before entering the arc extinguishing grid, and from the arc entering the arc extinguishing grid to arc extinction. After loading the load, substitute the initial parameters to solve the equation. Among them, the first-order differential equation can be directly derived to obtain the analytical solution. The third stage satisfies a system of multivariate differential equations, and the arc current, length, and voltage of the next step are calculated by variable-step iteration until the solution error is satisfied. Then, new arc parameters are used for discrimination and calculation until the arc current is 0. Combining the solution results of each stage, the full waveform of the breaking current and voltage can be obtained.

[0064] In the described numerical simulation method for the breaking performance of a low-voltage circuit breaker, due to the symmetry of the positive and negative half-cycles of the sine wave, only the numerical equation is solved when the closing phase angle takes values in the range of [0°, 180°]. Keeping the effective current value and power factor unchanged, values of the closing phase angle in the range of [0°, 180°] are selected at equal intervals, and the numerical simulation equation is solved respectively to obtain the current and voltage waveforms during the large-current breaking process.

[0065] In the described quantitative evaluation method for the breaking performance of a low-voltage circuit breaker, a large amount of Joule heat will be generated in the conductor in a short time under the action of a large current, which affects the thermal stability of electrical equipment, and its magnitude is characterized by the Joule integral; the peak current affects the dynamic stability of the equipment, and its magnitude is characterized by the current peak; at the same time, the arc directly burns the circuit breaker body during the breaking process and causes harm, and its magnitude is characterized by the arc energy. Therefore, the comprehensive evaluation of the breaking performance of the circuit breaker should include the influence of these three factors, and the set weights of the factors are different in different scenarios.

[0066] In the described quantitative evaluation method for the breaking performance of a low-voltage circuit breaker, it is obtained by numerical simulation that when the closing phase angle increases, different breaking parameters generally first decrease and then increase. Compared with the arc extinguishing time and peak current, the arc energy and Joule integral change significantly and can better characterize the breaking situation of the circuit breaker. The larger their values, the more serious the harm of the large current and the more severe the corresponding experimental conditions.

[0067] In the described quantitative evaluation method for the breaking performance of a low-voltage circuit breaker, calculate the per-unit values of the reduction of the Joule integral and arc energy when the electromagnetic coil and arc extinguishing grid are increased. Assuming that the weights of the two factors are both 0.5, calculate the increase value of the large-current harm to characterize the reduction degree of the breaking performance.

[0068] As Figure 2 and Figure 3 shown, when the effective short-circuit current is 15 kA and the power factor is 0.3, as the closing phase angle increases from 0° to 90°, the current rising speed increases, the appearance time and the time to reach the peak of the arc voltage are advanced, the energization time is shortened, and the breaking voltage is equal to the power supply voltage after the arc is extinguished. After the closing phase angle is 90°, the arc voltage appears after the current transitions from a positive value to a relatively large negative value. The overall current rising speed slows down, the appearance time of the arc voltage is delayed, the energization time is extended. When the closing phase angle increases further, the current rising speed increases, the appearance time and the time to reach the peak of the arc voltage are advanced, the energization time is shortened. When the closing phase angle increases to 180°, the breaking current voltage is below zero, and its variation law is similar to that when the closing phase angle is 0°. The closing phase angle corresponding to the longest energization time of the circuit breaker is 120°.

[0069] When the closing phase angle increases, the breaking parameters generally decrease first and then increase. Compared with the arcing time and peak current, the arcing energy and joule integral change significantly, which can better characterize the breaking situation of the circuit breaker. The larger the value, the more serious the harm of the large current, and the more severe the corresponding experimental conditions. For example, Figure 4 As shown. It is calculated that under the breaking condition of 15 kA, the extreme points of the arcing energy and joule integral both appear in the interval of 120° to 180°.

[0070] Such as Figure 5 As shown, when the short-circuit current is 15 kA and the closing phase angle is 180°, with the increase of the grid plates, the joule integral decreases, the peak arc voltage and arcing energy increase, and the comprehensive characterization value of the large current harm generally decreases. The number of arc extinguishing grid plates can be increased to reduce the arcing time and joule integral and reduce the harm of the large current.

[0071] With the increase of the coils, the arcing time and arcing energy fluctuate slightly, the current peak and joule integral decrease, and the comprehensive characterization value of the large current harm generally decreases. The number of electromagnetic coils can be appropriately increased to reduce the peak current and joule integral and reduce the harm of the large current.

[0072] Embodiment 2:

[0073] The present invention also proposes a numerical simulation and quantitative evaluation system 200 for the breaking performance of a low-voltage circuit breaker. As Figure 6 shown, it includes:

[0074] An initial unit 201, configured to obtain the electrical parameters of the breaking process of the low-voltage circuit breaker, determine the variation law of the electrical parameters of the breaking process, and divide the growth interval of the arc according to the variation law;

[0075] A simulation solving unit 202, configured to establish a simulation equation for the breaking process according to the growth interval, and perform numerical simulation and solution on the breaking performance of the low-voltage circuit breaker based on the simulation equation;

[0076] A quantization unit 203, configured to quantify the breaking performance based on the numerical simulation solution result.

[0077] Among them, establishing the simulation equation for the breaking process includes:

[0078] Establishing a simulation equation for the stage from power-on to before arcing, a simulation equation for the stage when the arc is generated and stagnates, a simulation equation for the stage when the arc starts to move to before entering the arc extinguishing grid plates, and a simulation equation for the stage when the arc enters the arc extinguishing grid plates to arc extinction.

[0079] Among them, performing numerical simulation and solution on the breaking performance of the low-voltage circuit breaker includes:

[0080] Extract the closing phase angle under the most severe conditions of the extraction experiment, and equally-spaced select the values of the closing phase angle within the range of [0°, 180°], substitute them into the numerical simulation equation, and perform numerical simulation and solution.

[0081] Among them, the numerical simulation solution results include:

[0082] The current-voltage waveforms during the high-current breaking process.

[0083] Among them, the influencing factors for quantifying the breaking performance under different scenarios include:

[0084] Joule integral, current peak value, and arc energy.

[0085] Among them, quantifying the breaking performance includes:

[0086] In the scenario where the electromagnetic coil and arc extinguishing grid are increased, calculate the per-unit values of the reduction in Joule integral and arc energy, and assume that the weights of the Joule integral and arc energy are both 0.5, and calculate the degree of reduction in the breaking performance characterized by the increase in high-current hazards.

[0087] The present invention can solve the problems of unclear mutation nodes of the breaking arc of low-voltage circuit breakers and only carrying out qualitative detection, analyze the variation law of electrical parameters during the breaking process, divide the arc growth interval, propose a comprehensive characterization parameter for the breaking performance, and carry out quantitative evaluation of the breaking performance of the circuit breaker.

[0088] Embodiment 3:

[0089] Based on the same inventive concept, the present invention also provides a computer device, which includes a processor and a memory. The memory is used to store a computer program, the computer program includes program instructions, and the processor is used to execute the program instructions stored in the computer storage medium. The processor may be a Central Processing Unit (CPU), or may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate Arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, and is suitable for implementing one or more instructions, specifically suitable for loading and executing one or more instructions in the computer storage medium to implement the corresponding method flow or corresponding function, so as to implement the steps of the method in the above embodiments.

[0090] Embodiment 4:

[0091] Based on the same inventive concept, the present invention also provides a storage medium, specifically a computer-readable storage medium (Memory). The computer-readable storage medium is a memory device in a computer device, used to store programs and data. It can be understood that the computer-readable storage medium here can include both the built-in storage medium in the computer device and, of course, the extended storage medium supported by the computer device. The computer-readable storage medium provides a storage space, and this storage space stores the operating system of the terminal. Moreover, in this storage space, one or more instructions suitable for being loaded and executed by the processor are also stored. These instructions can be one or more computer programs (including program codes). It should be noted that the computer-readable storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory. One or more instructions stored in the computer-readable storage medium can be loaded and executed by the processor to implement the steps of the method in the above embodiments.

[0092] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memories, CD-ROMs, optical memories, etc.) containing computer-usable program codes. The solutions in the embodiments of the present invention can be implemented in various computer languages. For example, object-oriented programming languages such as Java and interpreted scripting languages such as JavaScript.

[0093] The present invention is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram, and the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the specified functions in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0094] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to work in a particular manner, such that the instructions stored in the computer-readable memory produce a manufacture including an instruction device that implements the functions specified in one or more of the processes and / or blocks Figure 1 in one or more of the processes and / or blocks Figure 1 specified in the function.

[0095] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus, such that a series of operational steps are performed on the computer or other programmable apparatus to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable apparatus provide steps for implementing the functions specified in one or more of the processes and / or blocks Figure 1 in one or more of the processes and / or blocks Figure 1 specified in the function.

[0096] Although the preferred embodiments of the present invention have been described, additional changes and modifications can be made to these embodiments by those skilled in the art once they learn of the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications that fall within the scope of the present invention.

[0097] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A method for numerical simulation and quantitative evaluation of breaking performance of a low voltage circuit breaker, characterized in that: include: Acquire the electrical parameters of the breaking process of the low-voltage circuit breaker, determine the changing rules of the electrical parameters of the breaking process, and divide the growth interval of the arc according to the changing rules; Establishing a simulation equation of the breaking process according to the growth interval, and numerically simulating and solving the breaking performance of the low-voltage circuit breaker based on the simulation equation; Based on the numerical simulation results, the breaking performance is quantified.

2. The method according to claim 1, characterized in that The simulation equation for establishing the breaking process includes: The simulation equations for the stage from power-on to before arc ignition, the simulation equations for the stage when the arc is generated and stagnates, the simulation equations for the stage from when the arc starts to move to before entering the arc extinguishing grid, and the simulation equations for the stage from when the arc enters the arc extinguishing grid to when the arc is extinguished are established.

3. The method according to claim 1, characterized in that The numerical simulation and solution of the breaking performance of the low-voltage circuit breaker include: The closing phase angle under the worst experimental conditions is extracted, and the values ​​of the closing phase angle in the interval [0°, 180°] are selected at equal intervals, substituted into the numerical simulation equation, and numerical simulation is performed and solved.

4. The method according to claim 1, characterized in that: The numerical simulation solution results include: Current and voltage waveforms during high current breaking process.

5. The method according to claim 1, characterized in that: Factors that influence the quantification of breaking performance in different scenarios include: Joule integral, current peak and arc energy.

6. The method according to claim 1, characterized in that The quantification of the breaking performance includes: In the scenario where the electromagnetic coil and the arc extinguishing grid are added, the scalar value of the Joule integral and the arc energy reduction value is calculated, and the weights of the Joule integral and the arc energy are both set to 0.5, and the degree of reduction in breaking performance represented by the increase in the high current hazard is calculated.

7. A numerical simulation and quantitative evaluation system for the breaking performance of a low-voltage circuit breaker, characterized in that: include: An initial unit, used for obtaining the electrical parameters of the breaking process of the low voltage circuit breaker, determining the variation law of the electrical parameters of the breaking process, and dividing the arc growth interval according to the variation law; A simulation solving unit, used for establishing a simulation equation of the breaking process according to the growth interval, and numerically simulating and solving the breaking performance of the low-voltage circuit breaker based on the simulation equation; The quantification unit is used to quantify the breaking performance based on the numerical simulation solution results.

8. The system according to claim 7, characterized in that The simulation equation for establishing the breaking process includes: The simulation equations for the stage from power-on to before arc ignition, the simulation equations for the stage when the arc is generated and stagnates, the simulation equations for the stage from when the arc starts to move to before entering the arc extinguishing grid, and the simulation equations for the stage from when the arc enters the arc extinguishing grid to when the arc is extinguished are established.

9. The system according to claim 7, characterized in that The numerical simulation and solution of the breaking performance of the low-voltage circuit breaker include: The closing phase angle under the worst experimental conditions is extracted, and the values ​​of the closing phase angle in the interval [0°, 180°] are selected at equal intervals, substituted into the numerical simulation equation, and numerical simulation is performed and solved.

10. The system according to claim 7, characterized in that The numerical simulation solution results include: Current and voltage waveforms during high current breaking process.

11. The system according to claim 7, characterized in that Factors that influence the quantification of breaking performance in different scenarios include: Joule integral, current peak and arc energy.

12. The system according to claim 7, characterized in that The quantification of the breaking performance includes: In the scenario where the electromagnetic coil and the arc extinguishing grid are added, the scalar value of the Joule integral and the arc energy reduction value is calculated, and the weights of the Joule integral and the arc energy are both set to 0.5, and the degree of reduction in breaking performance represented by the increase in the high current hazard is calculated.

13. A computer device, characterized in that: include: one or more processors; a processor for executing one or more programs; When the one or more programs are executed by the one or more processors, the method according to any one of claims 1 to 6 is implemented.

14. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and when the computer program is executed, the method according to any one of claims 1 to 6 is implemented.

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