Method, device and equipment for detecting breaking capacity of circuit breaker, medium and program product

Abstract

The invention relates to a method, a device and equipment for detecting the breaking capacity of a circuit breaker, a medium and a program product. The method comprises the following steps: acquiring a simulation model of a target circuit breaker, current breaking current and current arcing time; according to the simulation model, the current breaking current and the current arcing time, analog simulation is conducted on the working process of the target circuit breaker, and working temperature information of the target circuit breaker is obtained, the working temperature information represents a working temperature change state of the target circuit breaker in an arc combustion process and a medium recovery process; and detecting the breaking capacity of the target circuit breaker according to the working temperature information. By adopting the method, the detection accuracy of the breaking capacity of the circuit breaker can be improved.

Description

Technical Field

[0001] This application relates to the field of circuit breaker technology, and in particular to a method, apparatus, computer equipment, computer-readable storage medium, and computer program product for detecting the breaking capacity of a circuit breaker. Background Technology

[0002] A circuit breaker is a switching device used to automatically disconnect circuits to prevent electrical equipment and lines from being damaged by faults such as overloads and short circuits. It is commonly used in power systems to close, carry, and interrupt current under normal or abnormal circuit conditions. With the development of power grid technology, the application of circuit breakers has become increasingly widespread.

[0003] The breaking capacity of a circuit breaker refers to the maximum effective value of the short-circuit current that the circuit breaker can safely interrupt under rated voltage. The breaking capacity of a circuit breaker directly reflects the equipment's survivability under extreme fault conditions. Therefore, the breaking capacity of a circuit breaker can be used to evaluate its operating performance. Thus, to ensure the evaluation of the operating performance of circuit breakers, there is an urgent need for an accurate method to detect the breaking capacity of circuit breakers. Summary of the Invention

[0004] Therefore, it is necessary to provide a method, apparatus, computer equipment, computer-readable storage medium, and computer program product for detecting the breaking capacity of a circuit breaker that can improve the detection accuracy of the shortest arcing time of the circuit breaker, in order to address the above-mentioned technical problems.

[0005] In a first aspect, this application provides a method for detecting the breaking capacity of a circuit breaker, including:

[0006] Obtain the simulation model of the target circuit breaker, the current breaking current, and the current arcing time;

[0007] Based on the simulation model, the current interrupting current, and the current arcing time, the working process of the target circuit breaker is simulated to obtain the working temperature information of the target circuit breaker. The working temperature information represents the working temperature change state of the target circuit breaker during the arcing process and the dielectric recovery process.

[0008] Based on the operating temperature information, the breaking capacity of the target circuit breaker is detected.

[0009] Secondly, this application also provides a circuit breaker breaking capacity detection device, comprising:

[0010] The acquisition module is used to acquire the simulation model of the target circuit breaker, the current breaking current, and the current arcing time.

[0011] The simulation module is used to simulate the working process of the target circuit breaker based on the simulation model, the current breaking current and the current arcing time, and to obtain the working temperature information of the target circuit breaker, wherein the working temperature information characterizes the working temperature change state of the target circuit breaker during the arcing process and the dielectric recovery process.

[0012] The detection module is used to detect the breaking capacity of the target circuit breaker based on the operating temperature information.

[0013] Thirdly, this application also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0014] Obtain the simulation model of the target circuit breaker, the current breaking current, and the current arcing time;

[0015] Based on the simulation model, the current interrupting current, and the current arcing time, the working process of the target circuit breaker is simulated to obtain the working temperature information of the target circuit breaker. The working temperature information represents the working temperature change state of the target circuit breaker during the arcing process and the dielectric recovery process.

[0016] Based on the operating temperature information, the breaking capacity of the target circuit breaker is detected.

[0017] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, performs the following steps:

[0018] Obtain the simulation model of the target circuit breaker, the current breaking current, and the current arcing time;

[0019] Based on the simulation model, the current interrupting current, and the current arcing time, the working process of the target circuit breaker is simulated to obtain the working temperature information of the target circuit breaker. The working temperature information represents the working temperature change state of the target circuit breaker during the arcing process and the dielectric recovery process.

[0020] Based on the operating temperature information, the breaking capacity of the target circuit breaker is detected.

[0021] Fifthly, this application also provides a computer program product, including a computer program that, when executed by a processor, performs the following steps:

[0022] Obtain the simulation model of the target circuit breaker, the current breaking current, and the current arcing time;

[0023] Based on the simulation model, the current interrupting current, and the current arcing time, the working process of the target circuit breaker is simulated to obtain the working temperature information of the target circuit breaker. The working temperature information represents the working temperature change state of the target circuit breaker during the arcing process and the dielectric recovery process.

[0024] Based on the operating temperature information, the breaking capacity of the target circuit breaker is detected.

[0025] The aforementioned method, apparatus, computer equipment, computer-readable storage medium, and computer program product for detecting the breaking capacity of a circuit breaker acquire a simulation model of the target circuit breaker, the current breaking current, and the current arcing time. Based on the simulation model, the current breaking current, and the current arcing time, the operating process of the target circuit breaker is simulated to obtain the operating temperature information of the target circuit breaker. This operating temperature information characterizes the temperature changes of the target circuit breaker during the arcing and dielectric recovery processes. Based on the operating temperature information, the breaking capacity of the target circuit breaker is detected. By simulating the target circuit breaker itself and the circuit breaker's operating process, the breaking capacity of the target circuit breaker can be detected using the operating temperature information. Since the simulation process is similar to the actual arcing and dielectric recovery processes of a circuit breaker, the detected breaking capacity matches the actual circuit breaker, thus improving the accuracy of the circuit breaker's breaking capacity detection. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a diagram illustrating the application environment of a circuit breaker breaking capacity detection method in one embodiment.

[0028] Figure 2 This is a flowchart illustrating a circuit breaker breaking capacity detection method in one embodiment;

[0029] Figure 3 This is a flowchart illustrating the steps of detecting the breaking capacity of a target circuit breaker based on operating temperature information in one embodiment.

[0030] Figure 4 This is a flowchart illustrating the steps for obtaining arcing time information of a target circuit breaker in one embodiment;

[0031] Figure 5 This is a structural block diagram of a circuit breaker breaking capacity detection device in one embodiment;

[0032] Figure 6 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0034] It should be noted that the terms "first," "second," etc., used in this application can be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from the second element. The terms "comprising" and "having," and any variations thereof, used in this application, are intended to cover non-exclusive inclusion. The term "multiple" used in this application refers to two or more. The term "and / or" used in this application refers to one of the embodiments, or any combination of multiple embodiments.

[0035] The circuit breaker breaking capacity detection method provided in this application embodiment can be applied to, for example... Figure 1In the application environment shown, terminal 102 communicates with server 104 via a network. A data storage system can store the data that server 104 needs to process. The data storage system can be integrated onto server 104 or placed on a cloud or other network server. Server 104 acquires the simulation model, current breaking current, and current arcing time of the target circuit breaker; based on the simulation model, current breaking current, and current arcing time, it simulates the operation process of the target circuit breaker to obtain the operating temperature information of the target circuit breaker, where the operating temperature information characterizes the operating temperature change state of the target circuit breaker during the arcing process and the dielectric recovery process; based on the operating temperature information, it detects the breaking capacity of the target circuit breaker. Server 104 can push at least one of the simulation model, operating current information, and breaking capacity to terminal 102. Terminal 102 can be, but is not limited to, various personal computers, laptops, smartphones, tablets, drones, low-altitude aircraft, IoT devices, and portable wearable devices. IoT devices can include smart speakers, smart TVs, smart air conditioners, smart vehicle devices, projection devices, etc. Portable wearable devices can include smartwatches, smart bracelets, and head-mounted displays. Head-mounted displays can be virtual reality (VR) devices, augmented reality (AR) devices, smart glasses, etc. Server 104 can be a standalone physical server, a server cluster or distributed system consisting of multiple physical servers, or a cloud server providing cloud computing services.

[0036] In one exemplary embodiment, such as Figure 2 As shown, a method for detecting the breaking capacity of a circuit breaker is provided, which is then applied to... Figure 1 Taking server 104 as an example, the explanation includes the following steps 202 to 206. Wherein:

[0037] Step 202: Obtain the simulation model of the target circuit breaker, the current breaking current, and the current arcing time.

[0038] In step 202, the target circuit breaker is the circuit breaker awaiting performance testing. The simulation model can be a virtual model, a physical model, or a combination of both; no restrictions are placed here. The simulation model conforms to preset laws, including at least one of the following: the law of conservation of energy, the law of conservation of mass, the law of conservation of momentum, and the law of electric fields. The current arcing time can be set by the user as needed, can be an empirical value, or can be a random value (considering that the current arcing time will be adjusted later (adjusted in the direction of increasing and / or decreasing), therefore, the current arcing time can be set to a random value).

[0039] Alternatively, the law of conservation of energy can be expressed as a formula:

[0040]

[0041]

[0042]

[0043]

[0044] Where t is time, E is energy, and T is fluid temperature. The intense radiative dissipation caused by the photothermal effect of the electric arc. Where is the Joule heat input under the action of electric current, and h is the enthalpy. Let be the partition function of particle j. Let j be the mass fraction of particle j. For the enthalpy change of particle j, Let j be the mass of particle j. Let j be the enthalpy of particle j. This is the fluid velocity vector.

[0045] Alternatively, the law of conservation of mass can be expressed as a formula:

[0046]

[0047] in, For fluid density, It is the velocity vector of the fluid motion.

[0048] Alternatively, the law of conservation of momentum can be expressed as a formula:

[0049]

[0050] Where p is the gas pressure, τ is the tensor, j is the current density vector, and B is the magnetic flux density.

[0051] Alternatively, the electric field law can be expressed as a formula:

[0052]

[0053] in, It is the magnetic flux density vector. It is the current density vector. The electric field intensity vector, For electric potential, For electrical conductivity, The relative permeability of vacuum; and These are the radial and axial components of the magnetic vector, respectively. and These are unit vectors representing the radial and axial directions, respectively, where z represents the axial direction and r represents the radial direction. and These are the radial and axial current density vectors, respectively.

[0054] Step 204: Based on the simulation model, the current breaking current and the current arcing time, simulate the working process of the target circuit breaker to obtain the working temperature information of the target circuit breaker. The working temperature information represents the working temperature change state of the target circuit breaker during the arcing process and the dielectric recovery process.

[0055] The operating temperature information in step 204 includes the operating temperatures of the target circuit breaker as they change over time during the arc combustion process and the dielectric recovery process.

[0056] For example, step 204 includes: simulating the operation process of the target circuit breaker based on the simulation model, the current breaking current, and the current arcing time to obtain the operating current information of the target circuit breaker, wherein the operating current information characterizes the operating current change state of the target circuit breaker during the arcing process and the dielectric recovery process; updating the simulation model step by step based on the operating current information; and detecting the operating temperature information of the target circuit breaker based on each updated simulation model.

[0057] The operating current information includes pre-arc current information and post-arc current information. The pre-arc current information includes the pre-arc currents corresponding to the target circuit breaker during the arc combustion process, and the post-arc current information includes the post-arc currents corresponding to the target circuit breaker during the dielectric recovery process.

[0058] Furthermore, based on the simulation model, the current breaking current, and the current arcing time, the working process of the target circuit breaker is simulated to obtain the operating current information of the target circuit breaker, including: simulating the arc burning process of the target circuit breaker based on the current breaking current and the current arcing time to obtain the pre-arc current information; determining the arc resistance of the target circuit breaker based on the simulation model; and simulating the dielectric recovery process of the target circuit breaker based on the pre-arc current information and the arc resistance to obtain the post-arc current information.

[0059] As one embodiment, the arc combustion process of the target circuit breaker is simulated based on the current breaking current and the current arcing time to obtain the pre-arc current information, including: determining the magnitude of the current breaking current as the amplitude of the injected arc current; locating the initial phase corresponding to the arc combustion process of the target circuit breaker based on the current arcing time; and constructing the pre-arc current information based on the amplitude of the injected arc current and the initial phase corresponding to the arc combustion process of the target circuit breaker.

[0060] Optionally, based on the amplitude of the injected arc current and the initial phase corresponding to the arc combustion process of the target circuit breaker, the pre-arc current information is constructed and expressed by the formula:

[0061]

[0062] in, This is information about the pre-arc current. The amplitude of the injected arc current, This represents the initial phase corresponding to the arcing process of the circuit breaker.

[0063] As an example, the arc resistance of the target circuit breaker is determined according to the simulation model, including: locating the arc distribution area of ​​the target circuit breaker in the simulation model; dividing the arc distribution area into multiple arc slices; generating the conductance information of each arc slice according to the simulation model; and fusing the conductance information of each arc slice to obtain the arc resistance of the target circuit breaker.

[0064] Furthermore, locating the arc distribution area of ​​the target circuit breaker in the simulation model includes: determining the area between the moving and stationary contacts of the target circuit breaker in the simulation model as the arc distribution area of ​​the target circuit breaker.

[0065] As one embodiment, dividing the arc distribution area into multiple arc slices includes: obtaining the cutting interval distance, and dividing the arc distribution area into multiple arc slices according to the cutting interval distance.

[0066] The cutting interval distance can be set by the user as needed, or it can be an empirical value, or it can correspond to the length of the arc distribution area. Specifically, the area length and the cutting interval distance are positively correlated.

[0067] As an example, the conductivity information of each arc slice is generated according to the simulation model, including: for each arc slice, obtaining the gas medium property parameters of the arc slice, and generating the conductivity information of the arc slice according to the gas pressure, temperature and gas medium property parameters in the simulation model, wherein the conductivity information includes conductivity.

[0068] As one embodiment, the conductance information of each arc slice is fused to obtain the arc resistance of the target circuit breaker, including: converting the conductance information of each arc slice to obtain the slice resistance, and fusing the slice resistances of each arc slice to obtain the arc resistance of the target circuit breaker, wherein the fusion method includes summation fusion.

[0069] As one embodiment, the dielectric recovery process of the target circuit breaker is simulated based on the pre-arc current information and the arc resistance to obtain the post-arc current information, including: detecting the transient recovery voltage information of the circuit breaker based on the pre-arc current information and the simulation model; and simulating the dielectric recovery process of the target circuit breaker based on the transient recovery voltage information and the arc resistance to obtain the post-arc current information.

[0070] Furthermore, based on the pre-arc current information and the simulation model, the transient recovery voltage information of the target circuit breaker is detected, including: acquiring simulation time information; detecting the current zero-crossing time information of the target circuit breaker based on the pre-arc current information; detecting the cross-sectional recovery voltage information of the target circuit breaker based on the simulation model; and generating the transient recovery voltage information of the target circuit breaker based on the simulation time information, the current zero-crossing time information, and the cross-sectional recovery voltage information.

[0071] The aforementioned time information (including but not limited to simulation time information and current zero-crossing time information) can represent either the moment of occurrence or the duration of the cutoff; no limitation is imposed here. The cross-sectional recovery voltage information is used to characterize the rate of rise of the recovery voltage at the cross-section.

[0072] As one embodiment, the detection of the cross-sectional recovery voltage information of the target circuit breaker according to the simulation model includes: detecting the recovery voltage information and the number of cross sections of the target circuit breaker according to the simulation model, and determining the ratio between the recovery voltage information and the number of cross sections as the cross-sectional recovery voltage information of the circuit breaker.

[0073] As one embodiment, the transient recovery voltage information of the target circuit breaker is generated based on the simulated time information, the current zero-crossing time information, and the cross-section recovery voltage information. This includes: obtaining the time difference between the simulated time information and the current zero-crossing time information, fusing the time difference with the cross-section recovery voltage information to obtain the transient recovery voltage information of the target circuit breaker, wherein the fusion method is a product fusion method.

[0074] As an example, the dielectric recovery process of the target circuit breaker is simulated based on the transient recovery voltage information and the arc resistance to obtain the post-arc current information, including: determining the ratio between the transient recovery voltage information and the arc resistance as the post-arc current information.

[0075] Thus, Ohm's law is applied to detect the information of the post-arc current.

[0076] As an example, the simulation model is updated step by step according to the operating current information, including: updating the simulation model step by step according to the simulation time corresponding to each current (including but not limited to each pre-arc current and each post-arc current) in the operating current information.

[0077] As one embodiment, the operating temperature information of the target circuit breaker is detected based on the simulation model updated each time, including: detecting the temperature of the arc distribution area of ​​the target circuit breaker based on the simulation model updated each time, and obtaining the operating temperature information of the target circuit breaker.

[0078] Thus, each time step corresponds to a current, which can be used to update the simulation model. Therefore, the temperature of the simulation model can be detected, and the current and temperature at each time step can be synchronized.

[0079] Step 206: Detect the breaking capacity of the target circuit breaker based on the operating temperature information.

[0080] For example, step 206 includes: detecting the target circuit breaker in the first interruption state of each current interruption current according to the operating temperature information corresponding to each current interruption current, and detecting the interruption capacity of the target circuit breaker according to each first interruption state.

[0081] In the above-mentioned method for detecting the breaking capacity of a circuit breaker, the simulation model of the target circuit breaker, the current breaking current, and the current arcing time are acquired. Based on the simulation model, the current breaking current, and the current arcing time, the working process of the target circuit breaker is simulated to obtain the operating temperature information of the target circuit breaker. The operating temperature information represents the operating temperature change state of the target circuit breaker during the arcing process and the dielectric recovery process. Based on the operating temperature information, the breaking capacity of the target circuit breaker is detected. By simulating the target circuit breaker itself and the circuit breaker's working process, the breaking capacity of the target circuit breaker can be detected through the operating temperature information. The above simulation process is similar to the arcing process and dielectric recovery process of the actual circuit breaker, thus making the detected breaking capacity match the actual circuit breaker and improving the accuracy of the circuit breaker's breaking capacity detection.

[0082] In one exemplary embodiment, such as Figure 3 As shown, step 206 includes steps 302 to 308. Wherein:

[0083] Step 302: Based on the operating temperature information, detect the first breaking state of the target circuit breaker during the simulation process.

[0084] For example, step 302 includes: acquiring post-arc limit time information and post-arc start time information; and detecting the first breaking state of the target circuit breaker based on the temperature difference between the post-arc limit time information and the post-arc start time information.

[0085] Among them, the post-arc limit time information is used to characterize the limit time for the target circuit breaker to undergo thermal breakdown. The post-arc limit time information can be set by the user as needed, or it can be an empirical value, such as 100μs; the post-arc start time information is used to characterize the post-arc start time of the target circuit breaker.

[0086] Furthermore, based on the temperature difference between the post-arc limit time information and the post-arc start time information, the first breaking state of the target circuit breaker is detected, including: if the operating temperature at the post-arc limit time information is lower than the operating temperature at the post-arc start time information, a first breaking state representing the successful breaking of the target circuit breaker is generated; if the operating temperature at the post-arc limit time information is not lower than the operating temperature at the post-arc start time information, a first breaking state representing the failed breaking of the target circuit breaker is generated.

[0087] Thus, considering that the operating temperature at the time of the arc-after-limit time is lower than the operating temperature at the time of the arc-after-start time, it indicates that the target circuit breaker has sufficient heat at the start of the arc to interrupt the current. Therefore, a first interruption state representing the successful interruption of the target circuit breaker is generated. Conversely, if the operating temperature at the time of the arc-after-limit time is not lower than the operating temperature at the time of the arc-after-start time, it indicates that the target circuit breaker does not have enough heat at the start of the arc to interrupt the current. Therefore, a first interruption state representing the failed interruption of the target circuit breaker is generated. In summary, the accuracy of generating the first interruption state is improved.

[0088] If the first interruption state indicates that the target circuit breaker has successfully interrupted, then step 304 is executed, the current interruption current is adjusted in the direction of increase, and then the process returns to step 204.

[0089] If the first interruption state indicates that the target circuit breaker has failed to interrupt, then step 306 is executed to adjust the current interruption current in the direction of reduction, and then return to step 204.

[0090] If it is detected that the current interrupting current after any adjustment is the same as the current interrupting current before the adjustment, step 308 is executed to determine the current interrupting current with the largest value when the first interrupting state characterizes the successful interruption as the interrupting capacity of the target circuit breaker.

[0091] For example, if the current interruption current is 'a', step 302 is executed to obtain the first interruption state. When the interruption state indicates that the target circuit breaker has successfully interrupted, the current interruption current is adjusted to a+1, and the process returns to step 204. When the first interruption state indicates that the target circuit breaker has successfully interrupted, the current interruption current is adjusted to a+1+1, which is a+2, and the process returns to step 204. When the first interruption state indicates that the target circuit breaker has failed to interrupt, the current interruption current is adjusted to a+2-1, which is a+1. At this time, the current interruption current after adjustment is the same as the current interruption current before this adjustment, so the loop ends. At this time, the interruption current indicating that the target circuit breaker has successfully interrupted includes 'a' and 'a-1', so the interruption capacity is 'a'.

[0092] For example, if the current interruption current is 'a', step 302 is executed to obtain the first interruption state. The first interruption state indicates that the target circuit breaker fails to interrupt, so the current interruption current is adjusted to a-1, and the process returns to step 204. If the first interruption state indicates that the target circuit breaker fails to interrupt, the current interruption current is adjusted to a-1-1, which is a-2, and the process returns to step 204. If the first interruption state indicates that the target circuit breaker successfully interrupts, the current interruption current is adjusted to a-2+1, which is a-1. At this time, the adjusted current interruption current is the same as the current interruption current before this adjustment, so the loop ends. At this time, the interruption current indicating that the circuit breaker successfully interrupts includes 'a' and 'a-1', so the interruption capacity is 'a'.

[0093] In this embodiment, the first interruption state of the target circuit breaker during the simulation process is detected based on the operating temperature information. If the first interruption state indicates that the target circuit breaker has successfully interrupted, the current interruption current is adjusted in the direction of increase, and the process returns to the step of simulating the operation of the target circuit breaker based on the simulation model and the current interruption current to obtain the operating temperature information of the target circuit breaker. If the first interruption state indicates that the target circuit breaker has failed to interrupt, the current interruption current is adjusted in the direction of decrease, and the process returns to the step of simulating the operation of the target circuit breaker based on the simulation model and the current interruption current to obtain the operating temperature information of the target circuit breaker. The steps are as follows: If the current interrupting current after any adjustment is found to be the same as the current interrupting current before the adjustment, the current interrupting current with the largest value when the first interrupting state is successfully interrupted is determined as the interrupting capacity of the target circuit breaker. Considering that in the case of interruption failure, the interrupting current may be too large, the current interrupting current is reduced to make the target circuit breaker move closer to the direction of successful interruption. When the interruption is successful, the current interrupting current may not be the maximum that the target circuit breaker can withstand. Therefore, by increasing the current interrupting current, the interrupting capacity that makes the target circuit breaker successfully interrupt can be detected, thus improving the detection accuracy of the interrupting capacity.

[0094] In one exemplary embodiment, such as Figure 4 As shown, obtaining the current arcing time of the target circuit breaker in step 202 includes steps 402 to 308. Wherein:

[0095] Step 402: Obtain the arcing time information of the target circuit breaker, wherein the arcing time information includes at least one of long arcing time, short arcing time and medium arcing time.

[0096] For example, step 402 includes: obtaining at least one of the long arcing time, short arcing time and medium arcing time of the target circuit breaker.

[0097] Furthermore, obtaining the short arcing time of the target circuit breaker includes: obtaining a preset arcing time, and detecting the second breaking state of the target circuit breaker during the simulation process based on the simulation model, the preset arcing time, and the current breaking current; and detecting the short arcing time of the target circuit breaker based on the second breaking state.

[0098] Optionally, the specific implementation of detecting the second breaking state of the target circuit breaker during the simulation process based on the simulation model, preset arcing time, and current breaking current can refer to the specific implementation steps of detecting the first breaking state of the target circuit breaker during the simulation process based on the operating temperature information, as described above, and will not be repeated here.

[0099] As one embodiment, detecting the short arcing time of the target circuit breaker according to the second interruption state includes: if the second interruption state indicates that the target circuit breaker has successfully interrupted, adjusting the preset arcing time in the direction of reduction, and returning to the step of detecting the second interruption state of the target circuit breaker in the simulation process based on the simulation model, the preset arcing time, and the current interruption current; if the second interruption state indicates that the target circuit breaker has failed to interrupt, adjusting the preset arcing time in the direction of increase, and returning to the step of detecting the second interruption state of the target circuit breaker in the simulation process based on the simulation model, the preset arcing time, and the current interruption current; if it is detected that the preset arcing time after any adjustment is the same as the preset arcing time before the current adjustment, the preset arcing time with the smallest value when the second interruption state indicates successful interruption is determined as the short arcing time of the target circuit breaker.

[0100] For example, if the current arcing time is b, and the second interruption state is obtained, indicating that the target circuit breaker has successfully interrupted, the current arcing time is adjusted to b-1. The process then returns to the step of detecting the second interruption state of the target circuit breaker during the simulation process based on the simulation model, preset arcing time, and current interruption current. If the interruption state indicates that the target circuit breaker has successfully interrupted, the current arcing time is adjusted to b-1-1, i.e., b-2. The process then returns to the step of detecting the second interruption state of the target circuit breaker during the simulation process based on the simulation model, preset arcing time, and current interruption current. If the second interruption state indicates that the target circuit breaker has failed to interrupt, the current arcing time is adjusted to b-2+1, i.e., b-1. Since the adjusted current arcing time is the same as the current arcing time before this adjustment, the loop ends. At this point, the arcing time indicating that the target circuit breaker has successfully interrupted includes both b and b-1. Therefore, the shortest arcing time is b-1.

[0101] For example, if the current arcing time is b, and step 206 is executed, the second interruption state is obtained. The second interruption state indicates that the target circuit breaker fails to interrupt. The current arcing time is adjusted to b+1, and the process returns to execute the step of detecting the second interruption state of the target circuit breaker in the simulation process based on the simulation model, the preset arcing time, and the current interruption current. If the second interruption state indicates that the target circuit breaker fails to interrupt, the current arcing time is adjusted to b+1+1, which is b+2. The process returns to execute the step of detecting the second interruption state of the target circuit breaker in the simulation process based on the simulation model, the preset arcing time, and the current interruption current. If the second interruption state indicates that the target circuit breaker successfully interrupts, the current arcing time is adjusted to b+2-1, which is b+1. At this time, the adjusted current arcing time is the same as the current arcing time before this adjustment, so the loop ends. At this time, the arcing time indicating that the circuit breaker successfully interrupts includes b and b-1. Therefore, the shortest arcing time is b-1.

[0102] As one embodiment, obtaining the long arcing time of the target circuit breaker includes: obtaining an arcing time mapping relationship, and mapping the short arcing time according to the arcing time mapping relationship to obtain the long arcing time of the target circuit breaker, wherein the arcing time mapping relationship includes the mapping relationship between the long arcing time and the short arcing time.

[0103] As one embodiment, obtaining the arcing time of the target circuit breaker includes: determining the average value between the long arcing time and the short arcing time as the arcing time of the target circuit breaker.

[0104] Step 404: Determine the unselected arcing time in the arcing time information as the current arcing time.

[0105] Steps 204 to 206 are executed sequentially. After step 206, the process returns to step 404 until all arc times in the arc time information are selected.

[0106] In this embodiment, by acquiring the arcing time information of the target circuit breaker, wherein the arcing time information includes at least one of long arcing time, short arcing time, and medium arcing time; the determination step: determining the unselected arcing time in the arcing time information as the current arcing time; after detecting the breaking capacity of the target circuit breaker based on the operating temperature information, the method further includes: returning to execute the determination step until all arcing times in the arcing time information are selected, determining each time as the current arcing time by sequentially selecting each time, and executing a series of steps, thereby realizing the breaking capacity of the target circuit breaker under at least one of long arcing time, short arcing time, and medium arcing time, improving the comprehensiveness of the breaking capacity assessment.

[0107] As a detailed embodiment, the simulation model and current breaking current of the target circuit breaker are obtained; a preset arcing time is obtained, and the second breaking state of the target circuit breaker during the simulation process is detected based on the simulation model, the preset arcing time, and the current breaking current; if the second breaking state indicates that the target circuit breaker has successfully broken, the preset arcing time is adjusted in the direction of decreasing, and the process returns to the step of detecting the second breaking state of the target circuit breaker during the simulation process based on the simulation model, the preset arcing time, and the current breaking current; if the second breaking state indicates that the target circuit breaker has failed to break, the preset arcing time is adjusted in the direction of increasing, and the process returns to the step of detecting the second breaking state of the target circuit breaker during the simulation process based on the simulation model, the preset arcing time, and the current breaking current; if it is detected that the preset arcing time after any adjustment is the same as the preset arcing time before the current adjustment, the preset arcing time with the smallest value when the second breaking state indicates successful breaking is determined as the short arcing time of the target circuit breaker. Obtain the arcing time mapping relationship, and map the short arcing time according to the arcing time mapping relationship to obtain the long arcing time of the target circuit breaker. The arcing time mapping relationship includes the mapping relationship between the long arcing time and the short arcing time. The average value between the long arcing time and the short arcing time is determined as the medium arcing time of the target circuit breaker. The arcing time information includes at least one of the long arcing time, the short arcing time and the medium arcing time.

[0108] Further, the following steps are executed: The unselected arcing time from the arcing time information is determined as the current arcing time; based on the simulation model, the current breaking current, and the current arcing time, the operation process of the target circuit breaker is simulated to obtain the operating temperature information of the target circuit breaker, where the operating temperature information characterizes the operating temperature change state of the target circuit breaker during the arc combustion process and the dielectric recovery process; based on the operating temperature information, the first breaking state of the target circuit breaker during the simulation process is detected; if the first breaking state indicates that the target circuit breaker has successfully broken, the current breaking current is adjusted in the direction of increase, and the process returns to execute the adjustment of the target circuit breaker based on the simulation model and the current breaking current. The process of simulating the working process of the target circuit breaker to obtain its operating temperature information is as follows: If the first interruption state indicates that the target circuit breaker has failed to interrupt, the current interruption current is adjusted in the direction of reduction, and the process of simulating the working process of the target circuit breaker based on the simulation model and the current interruption current to obtain its operating temperature information is returned; If it is detected that the current interruption current after any adjustment is the same as the current interruption current before the adjustment, the current interruption current with the largest value when the first interruption state indicates successful interruption is determined as the interruption capacity of the target circuit breaker; The process of returning to the determination step is repeated until all arcing times in the arcing time information are selected.

[0109] Thus, by simulating the target circuit breaker itself and the circuit breaker's working process, the breaking capacity of the target circuit breaker can be detected through the operating temperature information. The above simulation process is similar to the arc burning process and dielectric recovery process of the actual circuit breaker. Therefore, the detected breaking capacity matches the actual circuit breaker, improving the accuracy of the circuit breaker's breaking capacity detection.

[0110] It should be understood that although the steps in the flowcharts of the above embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages in other steps. It is understood that the steps in different embodiments can be freely combined as needed, and all non-contradictory solutions formed by such combinations are within the scope of protection of this application.

[0111] Based on the same inventive concept, this application also provides a circuit breaker breaking capacity detection device for implementing the circuit breaker breaking capacity detection method described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations of one or more circuit breaker breaking capacity detection device embodiments provided below can be found in the limitations of the circuit breaker breaking capacity detection method described above, and will not be repeated here.

[0112] In one exemplary embodiment, such as Figure 5 As shown, a circuit breaker breaking capacity detection device is provided, comprising: a construction module, a simulation module, and a detection module, wherein:

[0113] The acquisition module is used to acquire the simulation model of the target circuit breaker, the current breaking current, and the current arcing time.

[0114] The simulation module is used to simulate the working process of the target circuit breaker based on the simulation model, the current breaking current and the current arcing time, and to obtain the working temperature information of the target circuit breaker. The working temperature information represents the working temperature change state of the target circuit breaker during the arcing process and the dielectric recovery process.

[0115] The detection module is used to detect the breaking capacity of the target circuit breaker based on the operating temperature information.

[0116] In one embodiment, the detection module is further configured to: detect the first interruption state of the target circuit breaker during the simulation process based on the operating temperature information; if the first interruption state indicates that the target circuit breaker has successfully interrupted, adjust the current interruption current in the direction of increase, and return to execute the step of simulating the operation process of the target circuit breaker based on the simulation model and the current interruption current to obtain the operating temperature information of the target circuit breaker; if the first interruption state indicates that the target circuit breaker has failed to interrupt, adjust the current interruption current in the direction of decrease, and return to execute the step of simulating the operation process of the target circuit breaker based on the simulation model and the current interruption current to obtain the operating temperature information of the target circuit breaker; if it is detected that the current interruption current after any adjustment is the same as the current interruption current before the current adjustment, determine the current interruption current with the largest value when the first interruption state indicates successful interruption as the interruption capacity of the target circuit breaker.

[0117] In one embodiment, the detection module is further configured to: acquire post-arc limit time information and post-arc start time information; and detect the first breaking state of the target circuit breaker based on the temperature difference between the post-arc limit time information and the post-arc start time information.

[0118] In one embodiment, the acquisition module is further configured to: acquire arcing time information of the target circuit breaker, wherein the arcing time information includes at least one of long arcing time, short arcing time and medium arcing time; and determine the arcing time that is not selected in the arcing time information as the current arcing time. The device further includes: a return module, configured to, after detecting the breaking capacity of the target circuit breaker based on the operating temperature information, return to the acquisition module to execute the determination step until all arcing times in the arcing time information are selected.

[0119] In one embodiment, the acquisition module is further configured to: acquire a preset arcing time, and detect the second breaking state of the target circuit breaker during the simulation process based on the simulation model, the preset arcing time, and the current breaking current; detect the short arcing time of the target circuit breaker based on the second breaking state; acquire an arcing time mapping relationship, and map the short arcing time according to the arcing time mapping relationship to obtain the long arcing time of the target circuit breaker, wherein the arcing time mapping relationship includes the mapping relationship between the long arcing time and the short arcing time; and determine the average value between the long arcing time and the short arcing time as the medium arcing time of the target circuit breaker.

[0120] In one embodiment, the simulation module is further configured to: if the second interruption state indicates that the target circuit breaker has successfully interrupted, adjust the preset arcing time in the direction of reduction, and return to execute the step of detecting the second interruption state of the target circuit breaker in the simulation process based on the simulation model, the preset arcing time, and the current interruption current; if the second interruption state indicates that the target circuit breaker has failed to interrupt, adjust the preset arcing time in the direction of increase, and return to execute the step of detecting the second interruption state of the target circuit breaker in the simulation process based on the simulation model, the preset arcing time, and the current interruption current; if it is detected that the preset arcing time after any adjustment is the same as the preset arcing time before the current adjustment, determine the preset arcing time with the smallest value when the second interruption state indicates successful interruption as the short arcing time of the target circuit breaker.

[0121] Each module in the circuit breaker breaking capacity detection device described above can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0122] In one exemplary embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 6As shown, the computer device includes a processor, memory, input / output interface, communication interface, display unit, and input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interface. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The input / output interface is used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, Near Field Communication (NFC), or other technologies. When the computer program is executed by the processor, it implements a method for detecting the breaking capacity of a circuit breaker. The display unit is used to form a visually visible image and can be a display screen, projection device, or virtual reality imaging device. The display screen can be an LCD screen or an e-ink screen. The input device of the computer device can be a touch layer covering the display screen, or buttons, trackballs, or touchpads set on the casing of the computer device, or external keyboards, touchpads, or mice, etc.

[0123] Those skilled in the art will understand that Figure 6 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0124] In one exemplary embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments.

[0125] In one exemplary embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps in the above-described method embodiments.

[0126] In one exemplary embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above-described method embodiments.

[0127] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0128] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0129] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0130] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for detecting the breaking capacity of a circuit breaker, characterized in that, The method includes: Obtain the simulation model of the target circuit breaker, the current breaking current, and the current arcing time; Based on the simulation model, the current interrupting current, and the current arcing time, the working process of the target circuit breaker is simulated to obtain the working temperature information of the target circuit breaker. The working temperature information represents the working temperature change state of the target circuit breaker during the arcing process and the dielectric recovery process. Based on the operating temperature information, the breaking capacity of the target circuit breaker is detected.

2. The method according to claim 1, characterized in that, The step of detecting the breaking capacity of the target circuit breaker based on the operating temperature information includes: Based on the operating temperature information, the first breaking state of the target circuit breaker during the simulation process is detected; If the first interruption state indicates that the target circuit breaker has successfully interrupted, then the current interruption current is adjusted in the direction of increase, and the process of simulating the working process of the target circuit breaker based on the simulation model and the current interruption current to obtain the working temperature information of the target circuit breaker is returned to the previous step. If the first interruption state indicates that the target circuit breaker has failed to interrupt, the current interruption current is adjusted in the direction of reduction, and the process returns to the step of simulating the working process of the target circuit breaker based on the simulation model and the current interruption current to obtain the working temperature information of the target circuit breaker. If the current interruption current after any adjustment is found to be the same as the current interruption current before the adjustment, the current interruption current with the largest value when the first interruption state characterizes a successful interruption is determined as the interruption capacity of the target circuit breaker.

3. The method according to claim 2, characterized in that, The step of detecting the first breaking state of the target circuit breaker during the simulation process based on the operating temperature information includes: Obtain the post-arc time limit information and the post-arc start time information; The first breaking state of the target circuit breaker is detected based on the temperature difference between the post-arc limit time information and the post-arc start time information.

4. The method according to claim 2, characterized in that, Obtain the current arcing time of the target circuit breaker, including: Obtain the arcing time information of the target circuit breaker, wherein the arcing time information includes at least one of long arcing time, short arcing time and medium arcing time; Determination Step: Determine the unselected arcing time in the arcing time information as the current arcing time; After detecting the breaking capacity of the target circuit breaker based on the operating temperature information, the method further includes: Return to the determination step until all arc times in the arc time information are selected.

5. The method according to claim 4, characterized in that, The step of obtaining the arcing time information of the target circuit breaker includes: Obtain the preset arcing time, and based on the simulation model, the preset arcing time, and the current breaking current, detect the second breaking state of the target circuit breaker during the simulation process; Based on the second interruption state, the short arcing time of the target circuit breaker is detected; Obtain the arcing time mapping relationship, and map the short arcing time according to the arcing time mapping relationship to obtain the long arcing time of the target circuit breaker, wherein the arcing time mapping relationship includes the mapping relationship between the long arcing time and the short arcing time; The average value between the long arcing time and the short arcing time is determined as the medium arcing time of the target circuit breaker.

6. The method according to claim 5, characterized in that, The step of detecting the short arcing time of the target circuit breaker according to the second interruption state includes: If the second interruption state indicates that the target circuit breaker has successfully interrupted, then the preset arcing time is adjusted in the direction of reduction, and the process returns to the step of detecting the second interruption state of the target circuit breaker in the simulation process based on the simulation model, the preset arcing time, and the current interruption current. If the second interruption state indicates that the target circuit breaker has failed to interrupt, the preset arcing time is adjusted in the direction of increase, and the process returns to the step of detecting the second interruption state of the target circuit breaker in the simulation process based on the simulation model, the preset arcing time, and the current interruption current. If it is detected that the preset arcing time after any adjustment is the same as the preset arcing time before the current adjustment, the preset arcing time with the smallest value when the second interruption state characterizes successful interruption is determined as the short arcing time of the target circuit breaker.

7. A circuit breaker breaking capacity detection device, characterized in that, The device includes: The acquisition module is used to acquire the simulation model of the target circuit breaker, the current breaking current, and the current arcing time. The simulation module is used to simulate the working process of the target circuit breaker based on the simulation model, the current breaking current and the current arcing time, and to obtain the working temperature information of the target circuit breaker, wherein the working temperature information characterizes the working temperature change state of the target circuit breaker during the arcing process and the dielectric recovery process. The detection module is used to detect the breaking capacity of the target circuit breaker based on the operating temperature information.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

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