A circuit breaker residual life evaluation method and device and a storage medium

Abstract

The application discloses a circuit breaker residual life evaluation method and device and a storage medium, wherein the method comprises the following steps: determining the number of times of having been broken according to the actual contact ablation angle of a target circuit breaker; determining the number of times of residual breaking of a rated breaking current according to the total number of times of breaking of the rated breaking current and the number of times of having been broken; and calculating the residual life of the target circuit breaker according to the number of times of residual breaking of the rated breaking current. According to the actual contact ablation angle of the target circuit breaker, the number of times of having been broken is determined, and the residual life of the circuit breaker is further calculated in combination with the number of times of residual breaking of the rated breaking current. The residual life is calculated based on the number of times of residual breaking of the rated breaking current, the influence of the number of times of residual breaking on the life of the circuit breaker is comprehensively considered, and therefore the accuracy of the residual life evaluation of the circuit breaker can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and in particular to a method, device and storage medium for evaluating the remaining life of a circuit breaker. Background Art

[0002] Circuit breakers are the most numerous electrical equipment in the power grid, playing a control and protection role. Once a failure occurs, it will not only directly lead to power grid accidents, but also cause existing accidents to expand, bringing huge negative impacts on the national economy and social stability. Accurately assessing the remaining life of circuit breakers is of great significance to ensuring the safe, stable and economic operation of the power grid.

[0003] Existing methods for assessing the remaining life of circuit breakers usually directly calculate the remaining life of the circuit breaker based on the actual contact erosion of the circuit breaker and the maximum contact erosion when the service life is reached. This does not take into account the factors that affect the life of the circuit breaker under actual conditions, making it difficult to accurately assess the remaining life of the circuit breaker. Summary of the Invention

[0004] The present invention provides a method, device and storage medium for evaluating the remaining life of a circuit breaker, so as to solve the technical problem that the existing method for evaluating the remaining life of a circuit breaker does not take into account the factors that actually affect the life of the circuit breaker, resulting in difficulty in accurately evaluating the remaining life of the circuit breaker.

[0005] The present invention provides a method for evaluating the remaining life of a circuit breaker, comprising:

[0006] Determine the number of disconnections based on the actual contact erosion angle of the target circuit breaker;

[0007] Determining the remaining breaking times of the rated breaking current based on the total breaking times of the rated breaking current and the breaking times already achieved;

[0008] The remaining life of the target circuit breaker is determined according to the remaining breaking times of the rated breaking current.

[0009] Furthermore, determining the number of disconnections according to the actual contact erosion angle of the target circuit breaker includes:

[0010] The number of breaking times is determined according to the actual contact erosion angle of the target circuit breaker and a first correspondence between different contact erosion angles and the number of breaking times at the rated breaking current.

[0011] Furthermore, the circuit breaker remaining life assessment method further includes:

[0012] Determine the maximum contact erosion angle of the target circuit breaker when it reaches the end of its service life;

[0013] Determining, within the range of the maximum contact ablation angle, a second correspondence between different contact ablation angles and contact ablation amounts, and a third correspondence between different ablation amounts and the number of interruptions at the rated breaking current;

[0014] According to the second corresponding relationship and the third corresponding relationship, a first corresponding relationship between different contact erosion angles and rated breaking current times is determined.

[0015] Furthermore, the calculating of the remaining life of the target circuit breaker according to the remaining breaking times of the rated breaking current includes:

[0016] The amount of electrical wear for each interruption is determined, and the remaining life of the target circuit breaker is calculated based on the electrical wear and the remaining number of interruptions at the rated breaking current.

[0017] Furthermore, the determination of the amount of electrical wear for each interruption includes:

[0018] The electrical wear amount for each interruption is determined according to the total number of interruptions of the rated interrupting current.

[0019] Furthermore, the circuit breaker remaining life assessment method further includes:

[0020] Get the total breaking times of the rated short-circuit current of the target circuit breaker;

[0021] The total rated short-circuit current breaking times of the target circuit breaker is calculated according to the total rated short-circuit current breaking times, the short-circuit current and the breaking current.

[0022] The present invention also provides a circuit breaker remaining life assessment device, comprising:

[0023] A module for determining the number of disconnections, used to determine the number of disconnections based on the actual contact erosion angle of the target circuit breaker;

[0024] A module for determining the number of remaining breaking times is used to determine the remaining breaking times of the rated breaking current based on the total breaking times of the rated breaking current and the breaking times already completed;

[0025] The circuit breaker remaining life determination module is used to determine the remaining life of the target circuit breaker according to the remaining breaking times of the rated breaking current.

[0026] Furthermore, the module for determining the number of disconnections is used to:

[0027] The number of breaking times is determined according to the actual contact erosion angle of the target circuit breaker and a first correspondence between different contact erosion angles and the number of breaking times at the rated breaking current.

[0028] The present invention also provides a terminal device, comprising: a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor implements the above-mentioned circuit breaker remaining life assessment method when executing the computer program.

[0029] The present invention also 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 circuit breaker remaining life assessment method as described above.

[0030] The embodiment of the present invention determines the number of interruptions based on the actual contact erosion angle of the target circuit breaker, and further calculates the remaining life of the circuit breaker in combination with the remaining interruptions at the rated breaking current. The remaining life is calculated based on the remaining interruptions at the rated breaking current, and the influence of the remaining interruptions on the life of the circuit breaker is comprehensively considered, thereby effectively improving the accuracy of the remaining life assessment of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 1 is a flow chart of a method for evaluating the remaining life of a circuit breaker provided by an embodiment of the present invention;

[0032] Figure 2 Schematic diagram of the ablation of the circuit breaker contacts provided by an embodiment of the present invention;

[0033] Figure 3 is a graph showing the relationship between the contact ablation angle and the contact ablation amount provided by an embodiment of the present invention;

[0034] Figure 4 1 is a graph showing the relationship between the contact erosion angle and the rated breaking current provided by an embodiment of the present invention;

[0035] Figure 5 1 is another flow chart of the method for evaluating the remaining life of a circuit breaker provided by an embodiment of the present invention;

[0036] Figure 6 It is a structural diagram of a circuit breaker remaining life assessment method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0038] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0040] See also Figure 1 The present invention provides a method for evaluating the remaining life of a circuit breaker, comprising:

[0041] S1. Determine the number of disconnections based on the actual contact erosion angle of the target circuit breaker;

[0042] In an embodiment of the present invention, the actual contact erosion angle of the target circuit breaker can be measured under a certain working condition by radiating electromagnetic waves, and combined with the N-1 curve of the circuit breaker, the number of times the current target circuit breaker has been opened and closed under the current working condition can be determined, wherein the current working condition can be the working condition of the rated breaking current.

[0043] S2. Determine the remaining breaking times of the rated breaking current based on the total breaking times and the breaking times of the rated breaking current;

[0044] In an embodiment of the present invention, the total number of rated short-circuit current switching times of the target circuit breaker can be obtained based on relevant parameters provided by the circuit breaker manufacturer, and then the total number of rated breaking current switching times can be determined based on the actual breaking current, wherein the total number of rated breaking current switching times is the total number of times the circuit breaker is allowed to open and close under the current actual breaking current.

[0045] In the embodiment of the present invention, the remaining breaking times of the rated breaking current can be obtained by subtracting the breaking times already completed from the total breaking times of the rated breaking current.

[0046] S3. Calculate the remaining life of the target circuit breaker based on the remaining breaking times of the rated breaking current.

[0047] In an embodiment of the present invention, the amount of electrical wear caused by each interruption under the current rated breaking current can be determined. By multiplying the remaining number of interruptions under the rated breaking current by the single electrical wear, the accurate remaining life of the target circuit breaker can be obtained. The remaining life is in the form of a percentage, for example, it can be 20%, 30%, etc.

[0048] The embodiment of the present invention determines the number of interruptions based on the actual contact erosion angle of the target circuit breaker, and further calculates the remaining life of the circuit breaker in combination with the remaining interruptions at the rated breaking current. The remaining life is calculated based on the remaining interruptions at the rated breaking current, and the influence of the remaining interruptions on the life of the circuit breaker is comprehensively considered, thereby effectively improving the accuracy of the remaining life assessment of the circuit breaker.

[0049] In one embodiment, step S1, determining the number of disconnections according to the actual contact erosion angle of the target circuit breaker, includes:

[0050] The number of breaking times is determined according to the actual contact erosion angle of the target circuit breaker and a first correspondence between different contact erosion angles and the number of breaking times of the rated breaking current.

[0051] In the embodiment of the present invention, the first corresponding relationship between different contact erosion angles and the number of interrupting times of the rated breaking current may be determined based on the N-1 curve method.

[0052] In an embodiment of the present invention, by considering the actual situation of contact erosion, rather than relying solely on theoretical models or empirical values, the remaining life of the circuit breaker can be more accurately evaluated through the correspondence between the actual contact erosion angle and the number of interruptions at the rated breaking current, thereby improving the accuracy of the circuit breaker life assessment.

[0053] In one embodiment, the circuit breaker remaining life assessment method further includes:

[0054] S101, determining a maximum contact erosion angle of a target circuit breaker when the target circuit breaker reaches the end of its service life;

[0055] In an embodiment of the present invention, the maximum contact erosion angle of a target circuit breaker when its service life reaches the end can be determined by ANSYS simulation testing, including:

[0056] The turbulence model and radiation model are added while satisfying the basic control equations, and then the arc physical parameters are set, including constant pressure specific heat capacity, thermal conductivity, electrical conductivity, viscosity coefficient and other parameters.

[0057] After setting the parameters, multiple calculations can be performed to obtain the breaking current of the contacts during the disconnection process under different erosion angles. If it cannot break the rated breaking current of the circuit breaker, it is considered that the circuit breaker contacts have reached the end of their service life, thereby determining the maximum contact erosion angle at which the target circuit breaker reaches the end of its service life.

[0058] S102, determining a second correspondence between different contact erosion angles and contact erosion amounts, and a third correspondence between different erosion amounts and the number of interruptions at the rated breaking current, within the range of the maximum contact erosion angle;

[0059] In the embodiment of the present invention, the maximum contact ablation angle is a limit contact ablation angle. The range of the maximum contact ablation angle is the ablation angle range from 0 to the maximum contact ablation angle.

[0060] In an embodiment of the present invention, during a breaking process, if the breaking current is consistent, the contact erosion amount is also consistent. By determining the erosion amount in different erosion states, the rated breaking current breaking times can be linked to the contact erosion angle.

[0061] See also Figure 2 In the embodiment of the present invention, the physical structure of the circuit breaker contact will change significantly under different ablation conditions. The present invention implements a geometric model analysis to establish contact models with different ablation angles. Through mathematical geometric analysis, the physical loss corresponding to different ablation angles can be obtained, and the contact ablation amount corresponding to different contact ablation angles can be further obtained, thereby establishing a contact ablation model. Figure 3 The relationship curve diagram shown in the figure is used as the first step to determine the second corresponding relationship.

[0062] Furthermore, the embodiment of the present invention may also use the N-1 curve to obtain a relationship curve between the contact ablation amount and the rated breaking current breaking times, thereby determining the third corresponding relationship.

[0063] In an embodiment of the present invention, the N-1 curve method can be used to set the number of interruptions allowed under the rated short-circuit current to N. That is, the rated short-circuit current interruption number is N. The relative electrical life of the contacts of a new circuit breaker is defined as 100%, and the relative electrical wear during each interruption of the rated short-circuit breaking current is 1 / N. Based on the N-1 curve of the circuit breaker, the total number of interruptions at the rated breaking current of the circuit breaker can be obtained as:

[0064]

[0065] Among them, N is the total breaking times of rated breaking current, n0 is the total breaking times of rated short-circuit current (for example, it can be 22 times), I0 is the rated short-circuit current of 40kA, and I is the actual breaking current.

[0066] According to the above formula, the corresponding allowable breaking times N1 for any breaking current I1 can be obtained. Then the relative electrical wear of a single breaking is 1 / N1. In this way, the relative electrical wear during any breaking can be calculated, and the relative electrical life L of the circuit breaker can also be calculated:

[0067]

[0068] In the embodiment of the present invention, L0 is the initial electrical life, and the initial value is 1. After the circuit breaker is calculated to have exceeded its electrical life, it is determined that the circuit breaker is too damaged to be successfully opened.

[0069] S103: Determine a first correspondence between different contact erosion angles and rated breaking current times according to the second correspondence and the third correspondence.

[0070] In the embodiment of the present invention, the second correspondence and the third correspondence can be combined, and after normalization processing, the contact erosion angle can be made to correspond to the remaining life in the curve method, and further correspond to the remaining life and the number of interruptions, so as to determine Figure 4 The relationship curve between different contact erosion angles and rated breaking current times is shown, and the first corresponding relationship is further determined.

[0071] By determining the first correspondence between different contact erosion angles and the rated breaking current times, the embodiment of the present invention can quickly and accurately determine the number of breaking times based on the actual contact erosion angle of the circuit breaker, thereby further determining the remaining breaking times of the rated breaking current to calculate the remaining life of the current circuit breaker.

[0072] In one embodiment, the remaining life of the target circuit breaker is calculated based on the remaining breaking times of the rated breaking current, including:

[0073] Determine the electrical wear amount for each interruption, and calculate the remaining life of the target circuit breaker based on the electrical wear amount and the remaining number of interruptions at the rated interrupting current.

[0074] In the embodiment of the present invention, when determining the amount of electrical wear per interruption, the product of the remaining number of interruptions of the rated interrupting current and the amount of electrical wear per interruption may be used as the remaining life of the target circuit breaker.

[0075] The embodiments of the present invention take into account the actual wear of the circuit breaker contacts caused by each disconnection, which can effectively improve the remaining life assessment effect of the circuit breaker. By accurately assessing the remaining life of the circuit breaker, it can be ensured that the circuit breaker can be replaced in time before reaching its safe use limit, thereby improving the safety of the entire power system.

[0076] In one embodiment, the circuit breaker remaining life assessment method further includes:

[0077] Get the total breaking times of the rated short-circuit current of the target circuit breaker;

[0078] The total number of rated short-circuit current breaking times of the target circuit breaker is calculated based on the total number of rated short-circuit current breaking times, the short-circuit current and the breaking current.

[0079] See also Figure 5 In one embodiment, another flow chart of a method for evaluating the remaining life of a circuit breaker is provided. Figure 5 As shown, the following steps are included:

[0080] S501. Determine whether the circuit breaker is scrapped based on the contact erosion angle.

[0081] In the embodiment of the present invention, the ablation angle of the contact can be measured by radiating electromagnetic waves, and the limit ablation angle for contact failure, that is, the maximum ablation angle, can be obtained by simulation calculation.

[0082] S502, converting the contact ablation angle into a contact ablation amount;

[0083] In the embodiment of the present invention, the contact ablation amount corresponding to the contact ablation angle can be obtained by establishing a model and applying numerical calculations;

[0084] S503, using the N-1 curve to draw a relationship curve between the contact erosion angle and the number of breaking times of the rated breaking current;

[0085] In an embodiment of the present invention, the N-1 curve provided by the manufacturer can be used to obtain the rated breaking current breaking times, establish a relationship curve between the contact erosion amount and the rated breaking current breaking times, and further establish a relationship curve between the contact erosion angle and the rated breaking current breaking times.

[0086] S504: Determine the number of interruptions according to the actual contact erosion angle of the target contact, and calculate the remaining life of the target circuit breaker.

[0087] In the embodiment of the present invention, the number of interruptions can be determined according to the relationship curve in step S403, and the electrical wear of a single interruption and the remaining number of interruptions can be determined, thereby calculating the remaining life of the circuit breaker.

[0088] The implementation of the present invention has the following beneficial effects:

[0089] The embodiment of the present invention determines the number of interruptions based on the actual contact erosion angle of the target circuit breaker, and further calculates the remaining life of the circuit breaker in combination with the remaining interruptions at the rated breaking current. The remaining life is calculated based on the remaining interruptions at the rated breaking current, and the influence of the remaining interruptions on the life of the circuit breaker is comprehensively considered, thereby effectively improving the accuracy of the remaining life assessment of the circuit breaker.

[0090] See also Figure 6 Based on the same inventive concept as the above embodiment, the present invention further provides a circuit breaker remaining life assessment device, comprising:

[0091] The module 10 for determining the number of disconnections is used to determine the number of disconnections according to the actual contact erosion angle of the target circuit breaker;

[0092] The remaining breaking times determination module 20 is used to determine the remaining breaking times of the rated breaking current according to the total breaking times of the rated breaking current and the breaking times;

[0093] The circuit breaker remaining life determination module 30 is used to calculate the remaining life of the target circuit breaker according to the remaining breaking times of the rated breaking current.

[0094] In one embodiment, the disconnection times determination module 10 is configured to:

[0095] The number of breaking times is determined according to the actual contact erosion angle of the target circuit breaker and a first correspondence between different contact erosion angles and the number of breaking times of the rated breaking current.

[0096] In one embodiment, the circuit breaker remaining life assessment device further includes a corresponding relationship determination module, which is configured to:

[0097] Determine the maximum contact erosion angle of the target circuit breaker when it reaches the end of its service life;

[0098] Determine, within the range of the maximum contact ablation angle, a second correspondence between different contact ablation angles and contact ablation amounts, and a third correspondence between different ablation amounts and the number of interruptions at the rated breaking current;

[0099] According to the second corresponding relationship and the third corresponding relationship, a first corresponding relationship between different contact ablation angles and the rated breaking current times is determined.

[0100] In one embodiment, the remaining life of the target circuit breaker is calculated based on the remaining breaking times of the rated breaking current, including:

[0101] Determine the electrical wear amount for each interruption, and calculate the remaining life of the target circuit breaker based on the electrical wear amount and the remaining number of interruptions at the rated interrupting current.

[0102] In one embodiment, determining the amount of electrical wear for each interruption includes:

[0103] Determine the amount of electrical wear for each interruption based on the total number of interruptions at the rated interrupting current.

[0104] In one embodiment, the circuit breaker remaining life assessment device further includes a total breaking times determination module, which is configured to:

[0105] Get the total breaking times of the rated short-circuit current of the target circuit breaker;

[0106] The total number of rated short-circuit current breaking times of the target circuit breaker is calculated based on the total number of rated short-circuit current breaking times, the short-circuit current and the breaking current.

[0107] Accordingly, an embodiment of the present invention further provides a terminal device, comprising: 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, the circuit breaker remaining life assessment method according to any one of the above embodiments is implemented.

[0108] The terminal device of this embodiment includes: a processor, a memory, and a computer program and computer instructions stored in the memory and capable of running on the processor. When the processor executes the computer program, each step in the above embodiment 1 is implemented, such as Figure 1 Alternatively, when the processor executes the computer program, the functions of the modules / units in the above device embodiment are realized, such as the remaining breaking times determination module 20 .

[0109] Exemplarily, a computer program can be divided into one or more modules / units, one or more of which are stored in a memory and executed by a processor to implement the present invention. One or more modules / units can be a series of computer program instruction segments capable of performing specific functions, which describe the execution process of the computer program in a terminal device. For example, the remaining breaking times determination module 20 is configured to determine the remaining breaking times for the rated breaking current based on the total breaking times and the actual breaking times.

[0110] Terminal devices can be computing devices such as desktop computers, laptops, PDAs, and cloud servers. Terminal devices may include, but are not limited to, processors and memory. Those skilled in the art will appreciate that the schematic diagrams are merely examples of terminal devices and do not limit the scope of terminal devices. Terminal devices may include more or fewer components than shown, or combinations of certain components, or different components. For example, terminal devices may also include input / output devices, network access devices, buses, and the like.

[0111] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), 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. The processor is the control center of the terminal device, connecting various parts of the entire terminal device using various interfaces and lines.

[0112] The memory can be used to store computer programs and / or modules. The processor implements various functions of the terminal device by running or executing the computer programs and / or modules stored in the memory, and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area. The program storage area can store an operating system, at least one application required for a function, etc.; the data storage area can store data created based on the use of the mobile terminal, etc. In addition, the memory can include high-speed random access memory and non-volatile memory, such as a hard disk, internal memory, a plug-in hard disk, a smart media card (SMC), a 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 device.

[0113] If the module / unit integrated into the terminal device is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention can implement all or part of the process in the above-mentioned embodiment method by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, it can implement the steps of each of the above-mentioned method embodiments. The computer program includes computer program code, which can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium can include: any entity or device capable of carrying computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media does not include electric carrier signals and telecommunication signals.

[0114] Accordingly, 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 circuit breaker remaining life assessment method as described in any one of the above embodiments.

[0115] The above specific embodiments further illustrate the objectives, technical solutions, and beneficial effects of the present invention. It should be understood that the above are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. In particular, it should be noted that any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention for those skilled in the art.

Claims

1. A method for evaluating the remaining life of a circuit breaker, characterized in that: include: Determine the number of disconnections based on the actual contact erosion angle of the target circuit breaker; Determining the remaining breaking times of the rated breaking current based on the total breaking times of the rated breaking current and the breaking times already achieved; The remaining life of the target circuit breaker is determined according to the remaining breaking times of the rated breaking current.

2. The circuit breaker remaining life assessment method according to claim 1, wherein: The determining of the number of disconnections according to the actual contact erosion angle of the target circuit breaker includes: The number of breaking times is determined according to the actual contact erosion angle of the target circuit breaker and a first correspondence between different contact erosion angles and the number of breaking times at the rated breaking current.

3. The circuit breaker remaining life assessment method according to claim 2, wherein: Also includes: Determine the maximum contact erosion angle of the target circuit breaker when it reaches the end of its service life; Determining, within the range of the maximum contact ablation angle, a second correspondence between different contact ablation angles and contact ablation amounts, and a third correspondence between different ablation amounts and the number of interruptions at the rated breaking current; According to the second corresponding relationship and the third corresponding relationship, a first corresponding relationship between different contact erosion angles and rated breaking current times is determined.

4. The method for evaluating the remaining life of a circuit breaker according to claim 1, wherein: The calculating the remaining life of the target circuit breaker according to the remaining breaking times of the rated breaking current includes: The amount of electrical wear for each interruption is determined, and the remaining life of the target circuit breaker is calculated based on the electrical wear and the remaining number of interruptions at the rated breaking current.

5. The circuit breaker remaining life assessment method according to claim 4, characterized in that: Determining the amount of electrical wear for each interruption includes: The electrical wear amount for each interruption is determined according to the total number of interruptions of the rated interrupting current.

6. The method for evaluating the remaining life of a circuit breaker according to claim 1, wherein: Also includes: Get the total breaking times of the rated short-circuit current of the target circuit breaker; The total rated short-circuit current breaking times of the target circuit breaker is calculated according to the total rated short-circuit current breaking times, the short-circuit current and the breaking current.

7. A circuit breaker remaining life assessment device, characterized in that: include: A module for determining the number of disconnections, used to determine the number of disconnections based on the actual contact erosion angle of the target circuit breaker; A module for determining the number of remaining breaking times is used to determine the remaining breaking times of the rated breaking current based on the total breaking times of the rated breaking current and the breaking times already completed; The circuit breaker remaining life determination module is used to determine the remaining life of the target circuit breaker according to the remaining breaking times of the rated breaking current.

8. The circuit breaker remaining life assessment device according to claim 7, characterized in that: The module for determining the number of disconnections is used to: The number of breaking times is determined according to the actual contact erosion angle of the target circuit breaker and a first correspondence between different contact erosion angles and the number of breaking times at the rated breaking current.

9. A terminal device, characterized in that: include: 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, the method for evaluating the remaining life of a circuit breaker according to any one of claims 1 to 6 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 running, the device where the computer-readable storage medium is located is controlled to execute the circuit breaker remaining life assessment method according to any one of claims 1 to 6.

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