Circuit breaker residual life evaluation method and device and storage medium

Abstract

The invention discloses a circuit breaker residual life evaluation method and device and a storage medium, and the method comprises the steps: determining the number of times of breaking according to the actual contact ablation angle of a target circuit breaker; determining the residual breaking times of the rated breaking current according to the total breaking times and the broken times of the rated breaking current; and calculating the residual life of the target circuit breaker according to the residual breaking times of the rated breaking current. According to the embodiment of the invention, the number of times of breaking is determined according to the actual contact ablation angle of the target circuit breaker, the residual life of the circuit breaker is further calculated in combination with the residual number of times of breaking of the rated breaking current, and the residual life is calculated on the basis of the residual number of times of breaking of the rated breaking current. The influence of the residual on-off times on the service life of the circuit breaker is integrated, so that the accuracy of evaluating the residual service life 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, a device and a 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 the expansion of existing accidents, 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] The existing remaining life assessment method of circuit breakers usually directly calculates the remaining life of the circuit breaker based on the actual contact ablation of the circuit breaker and the maximum contact ablation when the service life is reached. It does not consider 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 circuit breaker remaining life assessment method, device and storage medium to solve the technical problem that the existing circuit breaker remaining life assessment method does not take into account the factors that affect the circuit breaker life under actual conditions, resulting in difficulty in accurately assessing the circuit breaker remaining life.

[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] 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 already made;

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

[0009] Furthermore, the determining of 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 corresponding relationship between different contact erosion angles and the number of breaking times of 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] 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 breaking times of 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] Further, the remaining life of the target circuit breaker is calculated according to the remaining breaking times of the rated breaking current, including:

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

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

[0018] The electrical wear amount of each breaking is determined according to the total breaking times of the rated breaking current.

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

[0020] Obtain 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 according to the actual contact erosion angle of the target circuit breaker;

[0024] A module for determining the remaining breaking times, used for determining the remaining breaking times of the rated breaking current according to the total breaking times of the rated breaking current and the breaking times already made;

[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 disconnection times determination module 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 corresponding relationship between different contact erosion angles and the number of breaking times of 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, and when the processor executes the computer program, the circuit breaker remaining life assessment method as described above is implemented.

[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 breaking times according to the actual contact ablation angle of the target circuit breaker, and further calculates the remaining life of the circuit breaker in combination with the remaining breaking times of the rated breaking current. The remaining life is calculated based on the remaining breaking times of the rated breaking current, and the influence of the remaining breaking times 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 It is a flow chart of a circuit breaker remaining life assessment method provided by an embodiment of the present invention;

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

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

[0034] Figure 4 is a curve diagram showing the relationship between the contact ablation angle and the rated breaking current times provided by an embodiment of the present invention;

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

[0036] Figure 6 It is a structural schematic 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 the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work 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 as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the feature. 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 clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to 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 according to 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 according to the total breaking times of the rated breaking current and the breaking times completed;

[0044] In an embodiment of the present invention, the total rated short-circuit current switching times of the target circuit breaker can be obtained according to the relevant parameters provided by the circuit breaker manufacturer, and then the total rated breaking current breaking times can be determined according to the actual breaking current, wherein the total rated breaking current breaking times is the total number of times the circuit breaker is allowed to break 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 which have been broken from the total breaking times of the rated breaking current.

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

[0047] In an embodiment of the present invention, the amount of electrical wear for each breaking can be determined under the current rated breaking current. By multiplying the remaining number of breaking times of 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 breaking times according to the actual contact ablation angle of the target circuit breaker, and further calculates the remaining life of the circuit breaker in combination with the remaining breaking times of the rated breaking current. The remaining life is calculated based on the remaining breaking times of the rated breaking current, and the influence of the remaining breaking times 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 ablation 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 the first corresponding relationship 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 breaking times of the rated breaking current can 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 breaking times of the rated breaking current, thereby improving the accuracy of the circuit breaker life evaluation.

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

[0054] S101, determining a maximum contact ablation 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 ablation angle of the target circuit breaker when the service life reaches the end can be determined by ANSYS simulation test, including:

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

[0057] After setting the parameters, multiple groups of calculations can be carried out to obtain the breaking current of the contacts during the breaking 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 when the target circuit breaker reaches its service life.

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

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

[0060] In the 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 breaking times of the rated breaking current 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 contact of the circuit breaker will change greatly under different ablation conditions. The present invention implements a method for analyzing the geometric model, establishing contact models with different ablation angles, and obtaining the physical losses corresponding to different ablation angles through mathematical geometric analysis, thereby further obtaining the contact ablation amounts corresponding to different contact ablation angles, thereby establishing Figure 3 The relationship curve diagram is shown, and the second corresponding relationship is determined in the first step.

[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 the embodiment of the present invention, the allowed breaking times under the rated short-circuit current can be set as N by the N-1 curve method, that is, the rated short-circuit current breaking times are N, and the relative electrical life of the contacts of a brand new circuit breaker is defined as 100%, then the relative electrical wear during each rated short-circuit breaking current breaking is 1 / N. According to the N-1 curve of the circuit breaker, the total breaking times of 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, and the corresponding 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 the electrical life, it is determined that the circuit breaker will be over-damaged and it is difficult to successfully open the circuit breaker.

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

[0070] In the embodiment of the present invention, the second corresponding relationship and the third corresponding relationship can be combined, and after normalization processing, the contact ablation 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 A curve diagram showing the relationship between different contact erosion angles and the rated breaking current times is shown, and a first corresponding relationship is further determined.

[0071] The embodiment of the present invention determines the first corresponding relationship between different contact erosion angles and the rated breaking current times, and can quickly and accurately determine the number of breaking times based on the actual contact erosion angle of the circuit breaker, so as to further determine the remaining breaking times of the rated breaking current and calculate the remaining life of the current circuit breaker.

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

[0073] The electrical wear amount of each interruption is determined, and the remaining life of the target circuit breaker is calculated 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 for each breaking, the product of the remaining breaking times of the rated breaking current and the amount of electrical wear for a single breaking may be used as the remaining life of the target circuit breaker.

[0075] The embodiment of the present invention takes into account the actual wear of the circuit breaker contacts caused by each disconnection, and can effectively improve the effect of the remaining life assessment 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] Obtain the total breaking times of the rated short-circuit current of the target circuit breaker;

[0078] The total rated breaking current switching 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.

[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, judging whether the circuit breaker is scrapped by the contact ablation 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 of the contact being scrapped, that is, the maximum ablation angle, can be obtained by simulation calculation.

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

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

[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 disconnections 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, and then the remaining life of the circuit breaker can be calculated.

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

[0089] The embodiment of the present invention determines the number of breaking times according to the actual contact ablation angle of the target circuit breaker, and further calculates the remaining life of the circuit breaker in combination with the remaining breaking times of the rated breaking current. The remaining life is calculated based on the remaining breaking times of the rated breaking current, and the influence of the remaining breaking times 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 also provides a circuit breaker remaining life assessment device, comprising:

[0091] A disconnection number determination module 10 is used to determine the disconnection number according to the actual contact ablation angle of the target circuit breaker;

[0092] The remaining breaking times determining 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 determining module 10 is used to:

[0095] The number of breaking times is determined according to the actual contact erosion angle of the target circuit breaker and the first corresponding relationship 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 used 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 corresponding relationship between different contact ablation angles and contact ablation amounts, and a third corresponding relationship between different ablation amounts and the number of breaking times of the rated breaking current;

[0099] 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.

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

[0101] The electrical wear amount of each interruption is determined, and the remaining life of the target circuit breaker is calculated 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 breaking current.

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

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

[0106] The total rated breaking current switching 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.

[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 of 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 executable on the processor. When the processor executes the computer program, each step in the above embodiment 1 is implemented, for example Figure 1 Alternatively, when the processor executes the computer program, the functions of each module / unit in the above device embodiment are implemented, such as the remaining breaking times determination module 20 .

[0109] Exemplarily, the computer program can be divided into one or more modules / units, one or more modules / units are stored in a memory and executed by a processor to complete the present invention. One or more modules / units can be a series of computer program instruction segments that can complete specific functions, and the instruction segments are used to describe the execution process of the computer program in the terminal device. For example, 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 and the breaking times of the rated breaking current.

[0110] The terminal device may be a computing device such as a desktop computer, a notebook, a PDA, and a cloud server. The terminal device may include, but is not limited to, a processor and a memory. Those skilled in the art will appreciate 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 may combine certain components, or different components. For example, the terminal device may also include an input / output device, a network access device, a bus, etc.

[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) 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 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 can be used to store computer programs and / or modules. The processor realizes 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, wherein 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 according to the use of the mobile terminal, 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] Among them, 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 this 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. When the computer program is executed by the processor, the steps of the above-mentioned various method embodiments can be implemented. Among them, 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. The computer-readable medium may include: any entity or device capable of carrying computer program code, recording medium, U disk, mobile hard disk, 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. 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, the computer-readable medium does not include electric carrier signals and telecommunication signals.

[0114] Accordingly, an embodiment of the present invention further provides a computer-readable storage medium, the computer-readable storage medium including 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 purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

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; 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 already made; 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, characterized in that: 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 the first corresponding relationship between different contact erosion angles and the number of breaking times of the rated breaking current.

3. The circuit breaker remaining life assessment method according to claim 2, characterized in that: Also includes: Determine the maximum contact erosion angle of the target circuit breaker when it reaches the end of its service life; 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 breaking times of 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 circuit breaker remaining life assessment method according to claim 1, characterized in that: The calculating the remaining life of the target circuit breaker according to the remaining breaking times of the rated breaking current includes: The electrical wear amount of each breaking is determined, and the remaining life of the target circuit breaker is calculated based on the electrical wear amount and the remaining breaking times of 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 of each breaking is determined according to the total breaking times of the rated breaking current.

6. The circuit breaker remaining life assessment method according to claim 1, characterized in that: Also includes: Obtain 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 according to the actual contact erosion angle of the target circuit breaker; A module for determining the remaining breaking times, used for determining the remaining breaking times of the rated breaking current according to the total breaking times of the rated breaking current and the breaking times already made; 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 disconnection times determination module is used for: The number of breaking times is determined according to the actual contact erosion angle of the target circuit breaker and the first corresponding relationship between different contact erosion angles and the number of breaking times of 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 circuit breaker remaining life assessment method 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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