Circuit breaker stability test method, device and equipment and storage medium

Abstract

The invention is suitable for the technical field of equipment testing, and provides a circuit breaker stability testing method, device and equipment and a storage medium, and the method comprises the steps: obtaining a motor action current when an AC motor connected with a target circuit breaker is powered on, and a release action current when an opening release connected with the target circuit breaker is powered on, the contact closing recovery current is obtained when the contact of the target circuit breaker is closed; and determining the stability of the target circuit breaker based on the motor action current, the release action current and the contact closing recovery current. The stability of the circuit breaker can be accurately determined.

Description

Technical Field

[0001] The present application belongs to the technical field of equipment testing, and in particular, relates to a circuit breaker stability testing method, device, equipment and storage medium. Background Art

[0002] The intelligent residual current circuit breaker for low-voltage power distribution lines is a combination product of a primary action mechanism and a secondary control unit. In the production process of this product, how to define the qualified product and ensure the stability of on-site operation is of practical significance. The circuit breaker is an important switch device on the low-voltage power distribution network line, with functions such as disconnecting fault current, protecting the human body from residual current, and supplying power normally. When a short circuit fault occurs in the line, the equipment plays a reliable protective role in human electric shock accidents.

[0003] Since the product is a secondary component nested in the primary structure, on-site maintenance is difficult and independent secondary components cannot be replaced independently. Therefore, it is particularly important to accurately determine the stability of the circuit breaker. Summary of the invention

[0004] Embodiments of the present application provide a circuit breaker stability testing method, apparatus, device, and storage medium to accurately determine the stability of a circuit breaker.

[0005] This application is implemented through the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a circuit breaker stability test method, wherein an AC motor control unit, a tripping release control unit, and a current acquisition unit are provided in a target circuit breaker, and the method comprises:

[0007] The motor operating current of the AC motor connected to the target circuit breaker when it is energized, the tripping device operating current of the opening tripping device connected to the target circuit breaker when it is energized, and the contact closing recovery current when the contacts of the target circuit breaker are closed are obtained.

[0008] The stability of the target circuit breaker is determined based on the motor operating current, the trip unit operating current and the contact closure recovery current.

[0009] In combination with the first aspect, in some possible implementations, determining the stability of the target circuit breaker based on the motor operating current, the tripper operating current and the contact closing recovery current includes:

[0010] A motor operating current curve is generated based on the motor operating current.

[0011] Based on the trip unit operating current, a trip unit operating current curve is generated.

[0012] Based on the contact closure recovery current, a contact closure recovery current curve is generated.

[0013] If the motor operating current curve meets the conditions, the release operating current curve meets the conditions and the contact closure recovery current curve meets the conditions, the stability of the target circuit breaker is qualified.

[0014] If the motor operating current curve, the trip unit operating current curve and the contact closure recovery current curve do not all meet the conditions, the stability of the target circuit breaker is unqualified.

[0015] In combination with the first aspect, in some possible implementations, the motor operating current curve meets the conditions, including:

[0016] A motor action current standard curve is obtained, and a plurality of first sample points on the motor action current standard curve are obtained, and a plurality of second sample points on the motor action current curve are obtained; wherein the time interval between adjacent first sample points is the same as the time interval between adjacent second sample points.

[0017] For each second sample point, the difference between the ordinates of the second sample point and the corresponding first sample point is calculated, recorded as a first difference; and the ratio of the first difference to the ordinate of the corresponding first sample point is calculated to obtain a first ratio.

[0018] If the first ratios corresponding to all the second sample points do not exceed the preset threshold, the motor action current curve meets the condition.

[0019] In combination with the first aspect, in some possible implementations, the trip device action current curve meets the conditions, including:

[0020] Obtain a trip unit action current standard curve, obtain a plurality of third sample points on the trip unit action current standard curve, and obtain a plurality of fourth sample points on the trip unit action current curve; wherein the time interval between adjacent third sample points is the same as the time interval between adjacent fourth sample points.

[0021] For each fourth sample point, the difference between the ordinates of the fourth sample point and the corresponding third sample point is calculated, recorded as a second difference; and the ratio of the second difference to the ordinate of the corresponding third sample point is calculated to obtain a second ratio.

[0022] If the second ratios corresponding to all the fourth sample points do not exceed the preset threshold, the trip unit action current curve meets the condition.

[0023] In conjunction with the first aspect, in some possible implementations, the contact closure recovery current curve meets the conditions, including:

[0024] A target harmonic component curve of the contact closure recovery current curve is extracted; wherein the target harmonic component curve is a third harmonic component curve, a fifth harmonic component curve, or a seventh harmonic component curve.

[0025] A standard harmonic component curve is obtained, and a plurality of fifth sample points on the standard harmonic component curve are obtained, and a plurality of sixth sample points on the target harmonic component curve are obtained; wherein the time interval between adjacent fifth sample points is the same as the time interval between adjacent sixth sample points.

[0026] For each sixth sample point, the difference between the ordinates of the sixth sample point and the corresponding fifth sample point is calculated, recorded as a third difference; and the ratio of the third difference to the ordinate of the corresponding fifth sample point is calculated to obtain a third ratio.

[0027] If the third ratios corresponding to all the sixth sample points do not exceed the preset threshold, the contact closure recovery current curve meets the conditions.

[0028] In combination with the first aspect, in some possible implementations, there are multiple target harmonic component curves; the number of standard harmonic component curves is the same as the number of target harmonic component curves, wherein each target harmonic component curve has a corresponding standard harmonic component curve.

[0029] In combination with the first aspect, in some possible implementations, a temperature acquisition module is further provided in the target circuit breaker; the temperature acquisition module is used to collect the ambient temperature; based on the motor action current, the tripper action current and the contact closure recovery current, determining the stability of the target circuit breaker includes:

[0030] For any ambient temperature, the stability test result of the target circuit breaker at the ambient temperature is determined based on the motor operating current, release operating current and contact closure recovery current at the temperature.

[0031] If the stability test results of the target circuit breaker are qualified at any ambient temperature, the stability of the target circuit breaker is qualified.

[0032] In a second aspect, an embodiment of the present application provides a circuit breaker stability testing device, comprising:

[0033] The data acquisition module is used to obtain the motor operating current when the AC motor connected to the target circuit breaker is energized, the tripping device operating current when the opening tripping device connected to the target circuit breaker is energized, and the contact closing recovery current when the contact of the target circuit breaker is closed.

[0034] The result output module is used to determine the stability of the target circuit breaker based on the motor action current curve, the tripper action current curve and the contact closure recovery current curve.

[0035] In a third aspect, an embodiment of the present application provides a terminal device, including: a processor and a memory, the memory being used to store a computer program, and when the processor executes the computer program, the circuit breaker stability testing method as described in any one of the first aspects is implemented.

[0036] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the circuit breaker stability testing method as described in any one of the first aspects is implemented.

[0037] It can be understood that the beneficial effects of the second to fourth aspects mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here.

[0038] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0039] The present application obtains the motor operating current when the AC motor connected to the target circuit breaker is energized, the tripper operating current when the opening tripper connected to the target circuit breaker is energized, and the contact closing recovery current when the contacts of the target circuit breaker are closed, and uses these three collected currents as evaluation conditions for the stability of the circuit breaker to determine whether the stability of the target circuit breaker is qualified. By jointly evaluating the stability using multiple currents, the stability result of the target circuit breaker is accurately determined, and products with unqualified stability are eliminated before using the target circuit breaker, so that the circuit breaker connected to the power grid can work stably without failure.

[0040] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0042] Figure 1 It is a flow chart of a circuit breaker stability testing method provided in one embodiment of the present application;

[0043] Figure 2 It is a structural schematic diagram of a circuit breaker stability testing device provided in one embodiment of the present application;

[0044] Figure 3 It is a structural diagram of a terminal device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0045] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0046] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0047] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0048] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0049] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0050] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0051] The embodiment of the present application provides a circuit breaker stability test method, wherein the target circuit breaker is provided with an AC motor control unit, a tripping release control unit and a current acquisition unit. Figure 1 is a schematic diagram of the process of a circuit breaker stability test method provided in an embodiment of the present application, with reference to Figure 1 , the circuit breaker stability test method is described in detail as follows:

[0052] Step 101, obtaining the motor operating current of the AC motor connected to the target circuit breaker when it is powered on, the tripping device operating current of the opening tripping device connected to the target circuit breaker when it is powered on, and the contact closing recovery current when the contacts of the target circuit breaker are closed.

[0053] For example, when the AC motor is powered on, the motor's operating current changes, and a current value is recorded every 20ms for 40s. When the trip release is powered on, the trip release's operating current also changes, and a current value is recorded every 20ms for 40s. When the target circuit breaker contacts are closed, the contact closure recovery current also changes, and a current value is recorded every 20ms for 40s.

[0054] Step 102, determining the stability of the target circuit breaker based on the motor operating current, the tripper operating current and the contact closure recovery current.

[0055] Exemplarily, step 102 may include:

[0056] A motor operating current curve is generated based on the motor operating current.

[0057] Based on the trip unit operating current, a trip unit operating current curve is generated.

[0058] Based on the contact closure recovery current, a contact closure recovery current curve is generated.

[0059] If the motor operating current curve meets the conditions, the release operating current curve meets the conditions and the contact closure recovery current curve meets the conditions, the stability of the target circuit breaker is qualified.

[0060] If the motor operating current curve, the trip unit operating current curve and the contact closure recovery current curve do not all meet the conditions, the stability of the target circuit breaker is unqualified.

[0061] For example, because the motor operating current, the tripper operating current and the contact closing recovery current are all current values ​​recorded every 20 ms, the points corresponding to the continuous current values ​​can be connected, so that the corresponding current curve can be obtained.

[0062] Exemplarily, the motor operating current curve meets the conditions and may include:

[0063] A motor action current standard curve is obtained, and a plurality of first sample points on the motor action current standard curve are obtained, and a plurality of second sample points on the motor action current curve are obtained; wherein the time interval between adjacent first sample points is the same as the time interval between adjacent second sample points.

[0064] For each second sample point, the difference between the ordinates of the second sample point and the corresponding first sample point is calculated, recorded as a first difference; and the ratio of the first difference to the ordinate of the corresponding first sample point is calculated to obtain a first ratio.

[0065] If the first ratios corresponding to all the second sample points do not exceed the preset threshold, the motor action current curve meets the condition.

[0066] Exemplarily, the trip device action current curve meets the conditions and may include:

[0067] Obtain a trip unit action current standard curve, obtain a plurality of third sample points on the trip unit action current standard curve, and obtain a plurality of fourth sample points on the trip unit action current curve; wherein the time interval between adjacent third sample points is the same as the time interval between adjacent fourth sample points.

[0068] For each fourth sample point, the difference between the ordinates of the fourth sample point and the corresponding third sample point is calculated, recorded as a second difference; and the ratio of the second difference to the ordinate of the corresponding third sample point is calculated to obtain a second ratio.

[0069] If the second ratios corresponding to all the fourth sample points do not exceed the preset threshold, the trip unit action current curve meets the condition.

[0070] Exemplarily, the contact closure recovery current curve meets the conditions and may include:

[0071] A target harmonic component curve of the contact closure recovery current curve is extracted; wherein the target harmonic component curve is a third harmonic component curve, a fifth harmonic component curve, or a seventh harmonic component curve.

[0072] A standard harmonic component curve is obtained, and a plurality of fifth sample points on the standard harmonic component curve are obtained, and a plurality of sixth sample points on the target harmonic component curve are obtained; wherein the time interval between adjacent fifth sample points is the same as the time interval between adjacent sixth sample points.

[0073] For each sixth sample point, the difference between the ordinates of the sixth sample point and the corresponding fifth sample point is calculated, recorded as a third difference; and the ratio of the third difference to the ordinate of the corresponding fifth sample point is calculated to obtain a third ratio.

[0074] If the third ratios corresponding to all the sixth sample points do not exceed the preset threshold, the contact closure recovery current curve meets the conditions.

[0075] For example, in order to ensure the reliability of the target circuit breaker, the motor action current curve, the tripper action current curve and the contact closure recovery current curve are evaluated at the same time. Only when all three curves meet the standards, the stability of the target circuit breaker is deemed qualified. The stability result of the target circuit breaker can be accurately determined, and products with unqualified stability can be eliminated before using the target circuit breaker, so that the circuit breaker connected to the power grid can work stably without failure.

[0076] Exemplarily, there are multiple target harmonic component curves; the number of standard harmonic component curves is the same as the number of target harmonic component curves, wherein each target harmonic component curve has a corresponding standard harmonic component curve.

[0077] Exemplarily, in order to more accurately determine whether the contact closure recovery current curve meets the conditions, the target harmonic component curve can be multiple at the same time, and there will be multiple corresponding standard harmonic component curves. Specifically, for example, assuming that the target harmonic component is the third harmonic component curve, the fifth harmonic component curve and the seventh harmonic component curve, the standard harmonic component curve is the standard curve corresponding to the third harmonic component curve, the standard curve corresponding to the fifth harmonic component curve and the standard curve corresponding to the seventh harmonic component curve. Determine whether the difference between the sample points on the third harmonic component curve, the fifth harmonic component curve and the seventh harmonic component curve and the ratio of the ordinate corresponding to the corresponding point on the standard curve exceeds the preset threshold. If each sample point does not exceed the preset threshold, the contact closure recovery current curve meets the conditions.

[0078] For example, assuming that the frequency of the contact closure recovery current curve is 50 Hz, the frequency of the third harmonic component curve is 150 Hz, and the frequency of the fifth harmonic component curve is 250 Hz.

[0079] Exemplarily, a temperature acquisition module is further provided in the target circuit breaker; the temperature acquisition module is used to collect the ambient temperature; based on the motor operating current, the tripper operating current and the contact closing recovery current, determining the stability of the target circuit breaker includes:

[0080] For any ambient temperature, the stability test result of the target circuit breaker at the ambient temperature is determined based on the motor operating current, release operating current and contact closure recovery current at the temperature.

[0081] If the stability test results of the target circuit breaker are qualified at any ambient temperature, the stability of the target circuit breaker is qualified.

[0082] For example, in order to ensure that the target circuit breaker works stably in different working environments, the ambient temperature factor is incorporated into the test. Generally, circuit breakers are divided into low temperature (below -20°C), normal temperature (-20°C to 40°C) and high temperature (above 40°C) environments when in use. Therefore, it is necessary to test the stability of the circuit breaker within the range of application environment temperature variation according to the actual application environment of the target circuit breaker to ensure that the target circuit breaker can work stably in actual application.

[0083] The above-mentioned circuit breaker stability test method obtains the motor operating current when the AC motor connected to the target circuit breaker is energized, the tripper operating current when the opening tripper connected to the target circuit breaker is energized, and the contact closing recovery current when the contacts of the target circuit breaker are closed, and uses these three collected currents as evaluation conditions for the stability of the circuit breaker to determine whether the stability of the target circuit breaker is qualified. By jointly evaluating the stability by using multiple currents, the stability result of the target circuit breaker is accurately determined, and products with unqualified stability are eliminated before using the target circuit breaker, so that the circuit breaker connected to the power grid can work stably without failure.

[0084] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0085] Corresponding to the circuit breaker stability testing method described in the above embodiment, Figure 2 A structural block diagram of a circuit breaker stability testing device provided in an embodiment of the present application is shown. For ease of explanation, only the parts related to the embodiment of the present application are shown.

[0086] See also Figure 2 , the circuit breaker stability testing device in the embodiment of the present application may include:

[0087] The data acquisition module 201 is used to obtain the motor operating current when the AC motor connected to the target circuit breaker is powered on, the tripper operating current when the opening tripper connected to the target circuit breaker is powered on, and the contact closing recovery current when the contacts of the target circuit breaker are closed.

[0088] The result output module 202 is used to determine the stability of the target circuit breaker based on the motor operating current curve, the trip unit operating current curve and the contact closure recovery current curve.

[0089] Exemplarily, the result output module 202 may be used to:

[0090] A motor operating current curve is generated based on the motor operating current.

[0091] Based on the trip unit operating current, a trip unit operating current curve is generated.

[0092] Based on the contact closure recovery current, a contact closure recovery current curve is generated.

[0093] If the motor operating current curve meets the conditions, the release operating current curve meets the conditions and the contact closure recovery current curve meets the conditions, the stability of the target circuit breaker is qualified.

[0094] If the motor operating current curve, the trip unit operating current curve and the contact closure recovery current curve do not all meet the conditions, the stability of the target circuit breaker is unqualified.

[0095] Exemplarily, the motor operating current curve meets the conditions and may include:

[0096] A motor action current standard curve is obtained, and a plurality of first sample points on the motor action current standard curve are obtained, and a plurality of second sample points on the motor action current curve are obtained; wherein the time interval between adjacent first sample points is the same as the time interval between adjacent second sample points.

[0097] For each second sample point, the difference between the ordinates of the second sample point and the corresponding first sample point is calculated, recorded as a first difference; and the ratio of the first difference to the ordinate of the corresponding first sample point is calculated to obtain a first ratio.

[0098] If the first ratios corresponding to all the second sample points do not exceed the preset threshold, the motor action current curve meets the condition.

[0099] Exemplarily, the trip device action current curve meets the conditions and may include:

[0100] Obtain a trip unit action current standard curve, obtain a plurality of third sample points on the trip unit action current standard curve, and obtain a plurality of fourth sample points on the trip unit action current curve; wherein the time interval between adjacent third sample points is the same as the time interval between adjacent fourth sample points.

[0101] For each fourth sample point, the difference between the ordinates of the fourth sample point and the corresponding third sample point is calculated, recorded as a second difference; and the ratio of the second difference to the ordinate of the corresponding third sample point is calculated to obtain a second ratio.

[0102] If the second ratios corresponding to all the fourth sample points do not exceed the preset threshold, the trip unit action current curve meets the condition.

[0103] Exemplarily, the contact closure recovery current curve meets the conditions and may include:

[0104] A target harmonic component curve of the contact closure recovery current curve is extracted; wherein the target harmonic component curve is a third harmonic component curve, a fifth harmonic component curve, or a seventh harmonic component curve.

[0105] A standard harmonic component curve is obtained, and a plurality of fifth sample points on the standard harmonic component curve are obtained, and a plurality of sixth sample points on the target harmonic component curve are obtained; wherein the time interval between adjacent fifth sample points is the same as the time interval between adjacent sixth sample points.

[0106] For each sixth sample point, the difference between the ordinates of the sixth sample point and the corresponding fifth sample point is calculated, recorded as a third difference; and the ratio of the third difference to the ordinate of the corresponding fifth sample point is calculated to obtain a third ratio.

[0107] If the third ratios corresponding to all the sixth sample points do not exceed the preset threshold, the contact closure recovery current curve meets the conditions.

[0108] Exemplarily, there are multiple target harmonic component curves; the number of standard harmonic component curves is the same as the number of target harmonic component curves, wherein each target harmonic component curve has a corresponding standard harmonic component curve.

[0109] Exemplarily, the target circuit breaker is further provided with a temperature acquisition module; the temperature acquisition module is used to collect the ambient temperature; the result output module 202 can also be used to:

[0110] For any ambient temperature, the stability test result of the target circuit breaker at the ambient temperature is determined based on the motor operating current, release operating current and contact closure recovery current at the temperature.

[0111] If the stability test results of the target circuit breaker are qualified at any ambient temperature, the stability of the target circuit breaker is qualified.

[0112] It should be noted that the information interaction, execution process, etc. between the above-mentioned devices / units are based on the same concept as the method embodiment of the present application. Their specific functions and technical effects can be found in the method embodiment part and will not be repeated here.

[0113] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0114] The present application also provides a terminal device, see Figure 3 The terminal device 300 may include: at least one processor 310 and a memory 320, wherein the memory 320 is used to store a computer program 321, and the processor 310 is used to call and run the computer program 321 stored in the memory 320 to implement the steps in any of the above-mentioned method embodiments, for example Figure 1 Step 101 to step 102 in the embodiment shown. Alternatively, when the processor 310 executes the computer program, the functions of each module / unit in the above-mentioned device embodiments are realized, for example Figure 2 The functions of each module are shown.

[0115] Exemplarily, the computer program 321 may be divided into one or more modules / units, one or more modules / units are stored in the memory 320, and are executed by the processor 310 to complete the present application. The one or more modules / units may be a series of computer program segments that can complete specific functions, and the program segments are used to describe the execution process of the computer program in the terminal device 300.

[0116] Those skilled in the art will understand that Figure 3 It is only an example of a terminal device and does not constitute a limitation on the terminal device. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components, such as input and output devices, network access devices, buses, etc.

[0117] The processor 310 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0118] The memory 320 may be an internal storage unit of the terminal device, or an external storage device of the terminal device, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. The memory 320 is used to store the computer program and other programs and data required by the terminal device. The memory 320 may also be used to temporarily store data that has been output or is to be output.

[0119] The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of the present application is not limited to only one bus or one type of bus.

[0120] The circuit breaker stability testing method provided in the embodiment of the present application can be applied to terminal devices such as computers, wearable devices, vehicle-mounted devices, tablet computers, laptops, netbooks, etc. The embodiment of the present application does not impose any restrictions on the specific type of terminal devices.

[0121] An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps in each embodiment of the above-mentioned circuit breaker stability test method can be implemented.

[0122] An embodiment of the present application provides a computer program product. When the computer program product runs on a mobile terminal, the mobile terminal can implement the steps in each embodiment of the above-mentioned circuit breaker stability test method when executing the computer program product.

[0123] If the integrated unit 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 application implements all or part of the processes in the above-mentioned embodiment method, which can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. 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 at least include: any entity or device that can carry the computer program code to the camera device / terminal device, recording medium, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal and software distribution medium. For example, a USB flash drive, a mobile hard disk, a disk or an optical disk.

[0124] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0125] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0126] In the embodiments provided in the present application, it should be understood that the disclosed devices / network equipment and methods can be implemented in other ways. For example, the device / network equipment embodiments described above are merely schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0127] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0128] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A circuit breaker stability testing method, characterized in that: The target circuit breaker is provided with an AC motor control unit, a tripping release control unit and a current acquisition unit, and the method comprises: Obtaining a motor operating current when an AC motor connected to the target circuit breaker is powered on, a tripping device operating current when a tripping device connected to the target circuit breaker is powered on, and a contact closing recovery current when contacts of the target circuit breaker are closed; The stability of the target circuit breaker is determined based on the motor operating current, the tripper operating current and the contact closure recovery current.

2. The circuit breaker stability testing method according to claim 1, characterized in that: The determining of the stability of the target circuit breaker based on the motor operating current, the tripper operating current and the contact closure recovery current comprises: Based on the motor action current, a motor action current curve is generated; Based on the trip unit operating current, a trip unit operating current curve is generated; generating a contact closure recovery current curve based on the contact closure recovery current; If the motor operating current curve meets the conditions, the tripper operating current curve meets the conditions and the contact closure recovery current curve meets the conditions, the stability of the target circuit breaker is qualified; If the motor operating current curve, the trip unit operating current curve and the contact closure recovery current curve do not all meet the conditions, the stability of the target circuit breaker is unqualified.

3. The circuit breaker stability testing method according to claim 2, characterized in that: The motor action current curve meets the conditions, including: Acquire a motor action current standard curve, acquire a plurality of first sample points on the motor action current standard curve, and acquire a plurality of second sample points on the motor action current curve; wherein the time interval between adjacent first sample points is the same as the time interval between adjacent second sample points; For each second sample point, calculate the difference between the ordinates of the second sample point and the corresponding first sample point, and record it as a first difference; calculate the ratio of the first difference to the ordinate of the corresponding first sample point to obtain a first ratio; If the first ratios corresponding to all the second sample points do not exceed the preset threshold, the motor action current curve meets the condition.

4. The circuit breaker stability testing method according to claim 2, characterized in that: The trip device operating current curve meets the conditions, including: Acquire a trip unit action current standard curve, acquire a plurality of third sample points on the trip unit action current standard curve, and acquire a plurality of fourth sample points on the trip unit action current curve; wherein the time interval between adjacent third sample points is the same as the time interval between adjacent fourth sample points; For each fourth sample point, calculate the difference between the ordinates of the fourth sample point and the corresponding third sample point, and record it as a second difference; calculate the ratio of the second difference to the ordinate of the corresponding third sample point to obtain a second ratio; If the second ratios corresponding to all the fourth sample points do not exceed the preset threshold, the trip unit action current curve meets the condition.

5. The circuit breaker stability testing method according to claim 2, characterized in that: The contact closure recovery current curve meets the conditions, including: Extracting a target harmonic component curve of the contact closure recovery current curve; wherein the target harmonic component curve is a third harmonic component curve, a fifth harmonic component curve, or a seventh harmonic component curve; Acquire a standard harmonic component curve, acquire a plurality of fifth sample points on the standard harmonic component curve, and acquire a plurality of sixth sample points on the target harmonic component curve; wherein the time interval between adjacent fifth sample points is the same as the time interval between adjacent sixth sample points; For each sixth sample point, calculate the difference between the ordinates of the sixth sample point and the corresponding fifth sample point, and record it as a third difference; calculate the ratio of the third difference to the ordinate of the corresponding fifth sample point to obtain a third ratio; If the third ratios corresponding to all the sixth sample points do not exceed the preset threshold, the contact closure recovery current curve meets the conditions.

6. The circuit breaker stability testing method according to claim 5, characterized in that: The number of the target harmonic component curves is multiple; the number of the standard harmonic component curves is the same as the number of the target harmonic component curves, wherein each target harmonic component curve has a corresponding standard harmonic component curve.

7. The circuit breaker stability testing method according to claim 1, characterized in that: The target circuit breaker is further provided with a temperature acquisition module; the temperature acquisition module is used to collect the ambient temperature; the determination of the stability of the target circuit breaker based on the motor action current, the tripper action current and the contact closure recovery current includes: For any ambient temperature, based on the motor operating current, the tripper operating current and the contact closure recovery current at the temperature, determine the stability test result of the target circuit breaker at the ambient temperature; If the stability test results of the target circuit breaker are qualified at any ambient temperature, the stability of the target circuit breaker is qualified.

8. A circuit breaker stability test device, characterized in that: include: A data acquisition module, used to acquire the motor operating current when the AC motor connected to the target circuit breaker is powered on, the tripping device operating current when the opening tripping device connected to the target circuit breaker is powered on, and the contact closing recovery current when the contact of the target circuit breaker is closed; The result output module is used to determine the stability of the target circuit breaker based on the motor action current curve, the tripper action current curve and the contact closure recovery current curve.

9. A terminal device, comprising: A processor and a memory, wherein the memory stores a computer program that can be run on the processor, wherein the processor implements the circuit breaker stability testing method according to any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the circuit breaker stability testing method according to any one of claims 1 to 7 is implemented.

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