A Circuit Breaker Monitoring Method, Device, Electronic Device and Storage Medium

Abstract

The present application discloses a circuit breaker monitoring method, device, electronic device and storage medium, relating to the technical field of circuit breaker control. The method includes: obtaining the working state parameters of the circuit breaker to be measured within a period of time, where the working state parameters include: the working current value of the circuit breaker, the on-circuit resistance value of the circuit breaker, the number of times the circuit breaker is disconnected, and the temperature value of the circuit breaker; if both the on-circuit resistance value and the temperature value of the circuit breaker are within the standard value range, determining whether the working current value is less than the tripping current threshold of the circuit breaker; if the working current value is less than the tripping current threshold, determining whether the number of disconnections is less than a first number; if the number of disconnections is less than or equal to the first number, outputting that the current state of the circuit breaker is a normal working state. Therefore, the present application has the advantages of timely prompting the monitoring state, high reliability and application safety.

Description

Technical Field

[0001] The present application relates to the technical field of circuit breaker control. Specifically, it relates to a circuit breaker monitoring method, device, electronic device, and storage medium. Background Art

[0002] In the prior art, a circuit breaker is an important control and protection device related to power distribution products. It can quickly disconnect the fault current when circuit faults such as overload and short circuit occur in the circuit, protecting power distribution products and other electrical equipment. It can also perform open / close operations through external control. Therefore, the stability and reliability of the circuit breaker performance play an important role in ensuring the safety of power distribution products, other electrical equipment, and the personal and property safety of users in the circuit.

[0003] However, traditional circuit breakers do not have the function of automatically monitoring and prompting for their own faults or aging and other lifespan problems during operation. With the long-term operation and opening / closing operations of the circuit breaker after installation, the electrical performance of the circuit breaker is prone to deterioration or even failure. In the case of continued use without monitoring or reminder, the circuit breaker has high potential safety hazards and is likely to cause a bad user experience. Summary of the Invention

[0004] The purpose of the present application is to provide a circuit breaker monitoring method, device, electronic device, and storage medium, which can judge the current state of the circuit breaker by obtaining the circuit breaker state parameters, and has the advantages of timely monitoring, high reliability, and application safety.

[0005] The embodiments of the present application are implemented as follows:

[0006] In the first aspect of the embodiments of the present application, a circuit breaker monitoring method is provided. The method includes:

[0007] Obtain the working state parameters of the circuit breaker to be tested within a period of time. The working state parameters include: the working current value of the circuit breaker, the on-circuit resistance value of the circuit breaker, the number of disconnections of the circuit breaker, and the temperature value of the circuit breaker; if both the on-circuit resistance value and the temperature value of the circuit breaker are within the standard value range, judge whether the working current value is less than the minimum value of the tripping current threshold of the circuit breaker; if the working current value is less than the minimum value of the tripping current threshold, judge whether the number of disconnections is less than the first number; if the number of disconnections is less than or equal to the first number, output the current state of the circuit breaker as the normal working state.

[0008] In one embodiment, the method further includes: if both the on-circuit resistance value and the temperature value of the circuit breaker are within the first floating range, judge whether the working current value is within the tripping current threshold range of the circuit breaker; if the working current value is within the tripping current threshold range of the circuit breaker, output the current state of the circuit breaker as the abnormal state, where the minimum value of the first floating range is greater than or equal to the maximum value of the standard value range.

[0009] In one embodiment, the abnormal state includes an aging state; if the working current value is within the tripping current threshold range of the circuit breaker, the current state of the circuit breaker is output as an abnormal state, including: if the working current value is within the tripping current threshold range of the circuit breaker and the number of disconnections is greater than the first number, the circuit breaker is output as being in an aging state.

[0010] In one embodiment, the number of disconnections of the circuit breaker includes the number of magnetic trips.

[0011] In one embodiment, the method further includes: if both the energized circuit resistance value and the circuit breaker temperature value are within the second floating range, the working current value is within the tripping current threshold range, and the number of magnetic trips is greater than the second number, the circuit breaker is output as being in a fault state; where the minimum value of the second floating range is greater than or equal to the maximum value of the first floating range.

[0012] In one embodiment, the energized circuit resistance value of the circuit breaker is obtained in the following manner:

[0013]

[0014] where i(t) is the working current value of the circuit breaker, R is the energized circuit resistance value of the circuit breaker, T is the temperature value of the circuit breaker, is the temperature change rate of the circuit breaker, k is a coefficient (related to the contact material, surface condition, and contact form), S is the cross-sectional area, C is the specific heat capacity, m is the mass, and T a is the basic ambient temperature value.

[0015] In a second aspect of the embodiments of the present application, a circuit breaker monitoring device is provided. The device includes: an acquisition module for acquiring the working state parameters of a circuit breaker to be measured within a period of time, where the working state parameters include: the working current value of the circuit breaker, the energized circuit resistance value of the circuit breaker, the number of disconnections of the circuit breaker, and the temperature value of the circuit breaker; a first judgment module for judging whether the working current value is less than the minimum value of the tripping current threshold of the circuit breaker if both the energized circuit resistance value and the circuit breaker temperature value are within the standard value range; a second judgment module for judging whether the number of disconnections is less than the first number if the working current value is less than the minimum value of the tripping current threshold; and an output module for outputting the current state of the circuit breaker as a normal working state if the number of disconnections is less than or equal to the first number.

[0016] In one embodiment, the first determination module is further configured to: if both the energized circuit resistance value and the circuit breaker temperature value are within the first floating range, determine whether the operating current value is within the trip current threshold range of the circuit breaker; the output module is further configured to: if the operating current value is within the trip current threshold range of the circuit breaker, output the current state of the circuit breaker as an abnormal state, where the minimum value of the first floating range is greater than or equal to the maximum value of the standard value range.

[0017] In one embodiment, the output module is further configured to: if the operating current value is within the trip current threshold range of the circuit breaker and the number of disconnections is greater than the first number, output that the circuit breaker is in an aging state.

[0018] In one embodiment, the output module is further configured to: if both the energized circuit resistance value and the circuit breaker temperature value are within the second floating range, the operating current value is within the trip current threshold range, and the number of magnetic trips is greater than the second number, output that the circuit breaker is in a faulty state; where the minimum value of the second floating range is greater than or equal to the maximum value of the first floating range.

[0019] A third aspect of the embodiments of the present application provides an electronic device, which includes: a circuit breaker; a detection device for detecting the operating state parameters of the circuit breaker within a period of time; a processor connected to the detection device; and a memory for storing instructions executable by the processor. Wherein, the processor is configured to execute the circuit breaker monitoring method of the first aspect and any of its embodiments of the present application.

[0020] A fourth aspect of the embodiments of the present application provides a computer-readable storage medium, which stores a computer program. The computer program can be executed by the processor to complete the circuit breaker monitoring method of the first aspect and any of its embodiments of the present application.

[0021] The beneficial effects of the present application compared with the prior art are:

[0022] The present application can solve the problem of potential safety hazards in the circuit that are likely to occur due to the difficulty in detecting the aging or malfunction of the circuit breaker. The present application determines the current operating state of the circuit breaker and outputs the corresponding state information by real-time monitoring and calculating the operating state parameters related to the circuit breaker. Therefore, the present application has the advantages of timely monitoring, high reliability, and application safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0024] Figure 1 Schematic structural diagram of an electronic device provided by an embodiment of the present application;

[0025] Figure 2 Schematic structural diagram of an application product of a circuit breaker monitoring method provided by an embodiment of the present application;

[0026] Figure 3 Schematic hardware structure diagram for implementing a circuit breaker monitoring method provided by an embodiment of the present application;

[0027] Figure 4 Schematic flow diagram of a circuit breaker monitoring method provided by an embodiment of the present application;

[0028] Figure 5 Schematic structural diagram of a circuit breaker monitoring device provided by an embodiment of the present application.

[0029] Reference numerals: 1 - electronic device; 10 - memory; 11 - bus; 12 - processor; 100 - power supply circuit; 120 - micro - control unit; 13 - detection device; 130 - mutual inductor; 131 - mutual - inductor current detection circuit; 132 - thermocouple temperature detection device; 133 - disconnection - times detection device; 14 - circuit breaker; 15 - display device; 2 - terminal distribution product; 600 - circuit breaker monitoring device; 610 - acquisition module; 620 - first judgment module; 630 - second judgment module; 640 - output module. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application.

[0031] Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present application, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0032] Next, the technical solutions of the present application will be clearly and completely described with reference to the accompanying drawings.

[0033] Please refer to Figure 1 , Figure 1 , which is a schematic structural diagram of the electronic device 1 provided by an embodiment of the present application. As Figure 1 shown, the electronic device 1 includes: a circuit breaker 14, at least one detection device 13, at least one processor 12, and at least one memory 10. Each component in the electronic device 1 is connected through a bus 11. The detection device 13 is used to detect the working - state parameters of the circuit breaker 14 within a period of time. The processor 12 is connected to the detection device 13, Figure 1Take a processor 12 as an example. The memory 10 stores instructions that can be executed by at least one processor 12. The instructions are executed by at least one processor 12 to enable the at least one processor 12 to execute the circuit breaker monitoring method in the following embodiments.

[0034] Please refer to Figure 2 , Figure 2 which is a schematic structural diagram of an application product of the circuit breaker monitoring method provided by an embodiment of the present application. As Figure 2 shown, the electronic device 1 can be used as a modularized general component. During the production and assembly process of terminal products, due to the need for electrical safety in the application environment or the need to assemble a circuit breaker 14, etc., it cooperates with the terminal product to form a terminal product with a circuit breaker 14 whose working state can be monitored; it can also be used as a component of an electrical device, connected to other components in the terminal product during production and assembly, and designed as an integrated terminal product.

[0035] Please refer to Figure 3 , Figure 3 which is a schematic hardware structure diagram for implementing the circuit breaker monitoring method provided by an embodiment of the present application. As Figure 3 shown, a microcontroller unit 120 (MCU(I / O)) is integrated in the electronic device 1 as a combination of the processor 12 and the memory 10 to execute the circuit breaker monitoring method in the following embodiments. The microcontroller unit 120 is connected to at least one detection device 13 to obtain working state parameters related to the circuit breaker 14. The microcontroller unit 120 is also connected to a power supply circuit 100. The power supply circuit 100 supplies power to the microcontroller unit 120 by connecting to the external live wire L and neutral wire N. The power supply circuit 100 can also supply power to other detection devices 13 to achieve real-time monitoring of the working state parameters of the circuit breaker (for clearer representation, the circuit breaker 14 and the connection relationship between the circuit breaker 14 and other detection devices 13 are not marked in the figure).

[0036] The detection device 13 can be combined with the mutual inductor 130 and the mutual inductor current detection circuit 131 to detect the operating current value of the circuit breaker. The mutual inductor 130 is mounted on the live wire to output current-related signals. The mutual inductor current detection circuit 131 processes the received signals to obtain the current value and sends it to the micro control unit 120. The detection device 13 can also include a thermocouple temperature detection device 132 or a disconnection times detection device 133 of the circuit breaker 14, which is used to output the temperature value or the disconnection times of the circuit breaker 14 to the micro control unit 120. Among them, the thermocouple is located at the connection between the main wire of the circuit breaker 14 and the terminal of the terminal power distribution product. The micro control unit 120 can also directly determine the fault disconnection type and the fault disconnection times of the circuit breaker 14 based on the operating current value of the circuit breaker 14. The above detection device 13 can select at least one according to the needs of the application environment or application products, etc. Based on different situations, the number and types of the specifically selected detection device 13 are also different.

[0037] The electronic device 1 can also selectively carry related prompting devices such as a display device 15, such as an indicator light. The micro control unit 120 is connected to the display device 15 to output a corresponding prompting signal to the display device 15 after confirming the operating state of the circuit breaker 14 based on the operating state parameters of the circuit breaker 14. The display device 15 displays differently to facilitate the operator to confirm the operating state of the circuit breaker 14.

[0038] Based on the above content, the implementation process of the circuit breaker monitoring method is as follows:

[0039] S01: Obtain the operating state parameters of the circuit breaker 14 to be measured within a period of time.

[0040] The operating state parameters refer to the parameters used to characterize the operating state of the circuit breaker 14 after the circuit breaker 14 is connected to the terminal power distribution product 2 and starts to work normally. The operating state of the circuit breaker 14 can be normal, aging, and faulty, etc. The operating state parameters can include: the operating current value of the circuit breaker 14, the on-circuit resistance value of the circuit breaker 14, the contact internal resistance of the moving and static contacts of the circuit breaker 14, the disconnection times of the circuit breaker 14, or the temperature value of the circuit breaker 14, etc. In the electronic device 1 for monitoring the state of the circuit breaker 14, after the detection device 13 obtains and calculates at least one set of the same type of data of the above operating state parameters, it sends them to the micro control unit 120. The micro control unit 120 receives the data sent by the detection device 13 and directly executes the next step based on the data content, or further calculates the operating state parameters required for the next step.

[0041] S02: Based on the operating state parameters of the circuit breaker 14 to be measured and the preset state threshold range corresponding to the operating state parameters, confirm the current state of the circuit breaker 14 and output it.

[0042] The status threshold range refers to the range of corresponding parameter thresholds preset by the operator to confirm the working status of the circuit breaker 14. After the micro control unit 120 obtains the working status parameters of the circuit breaker 14 within a period of time, it will automatically confirm the status threshold range to which the working status parameters belong and the status threshold range to which the parameter change values belong, and then confirm the current status information of the circuit breaker 14 and output relevant information.

[0043] The micro control unit 120 can output the current status information to relevant prompting devices such as the display device 15. Based on the differences in the current status information, the display device 15 correspondingly displays indicator lights of different colors or corresponding prompting text contents. In the embodiment of the present application, when the circuit breaker 14 is working in a normal state, the green light is on; when it is confirmed that the status of the circuit breaker 14 is aging, the yellow light is on; when it is confirmed that the circuit breaker 14 has a fault, the red light is on.

[0044] Furthermore, the specific process of implementing the circuit breaker monitoring method can also be as follows in the following embodiments:

[0045] Please refer to Figure 4 , Figure 4 which is a schematic flowchart of the circuit breaker monitoring method provided by an embodiment of the present application. As Figure 4 shown, the circuit breaker monitoring method includes:

[0046] S100: Obtain the working status parameters of the circuit breaker 14 to be measured within a period of time. The working status parameters include: the working current value of the circuit breaker 14, the on - circuit resistance value of the circuit breaker 14, the number of disconnections of the circuit breaker 14, and the temperature value of the circuit breaker 14.

[0047] The micro control unit 120 can directly obtain the working current value of the circuit breaker 14 through the signal output by the detection device 13 for detecting the working current value. The relevant fluctuation formula of the working current value is as follows:

[0048]

[0049] where i(t) is the current, E is the power supply voltage, R is the on - circuit resistance value, ω is the angular frequency, α is the initial phase angle, L is the line inductive reactance, is the power factor angle, and e is a constant.

[0050] The micro control unit 120 can also directly obtain the temperature value of the circuit breaker 14 through the signal output by the thermocouple temperature detection device 132, and calculate the on - circuit resistance value of the circuit breaker 14 based on the obtained working current value of the circuit breaker 14. The relevant formula for obtaining the on - circuit resistance value of the circuit breaker is as follows:

[0051]

[0052] Wherein, i(t) is the working current value of the circuit breaker, R is the resistance value of the energized circuit of the circuit breaker, T is the temperature value of the circuit breaker, is the temperature change rate of the circuit breaker, k is a coefficient related to the contact material, surface condition, and contact form, S is the cross-sectional area, C is the specific heat capacity, m is the mass, T a is the basic ambient temperature value. Among them, the temperature change rate of the circuit breaker is determined by the micro control unit 120 based on the temperature value of the circuit breaker 14 detected by the thermocouple temperature detection device 132 and the time elapsed.

[0053] Based on the different disconnection types of the circuit breaker 14, the fault disconnection of the circuit breaker 14 is divided into thermal trip disconnection and magnetic trip disconnection. The number of disconnections of the circuit breaker 14 can be counted and summarized separately by the micro control unit 120 based on the power-off record function for the number of fault disconnections. When the working current value at the power-off moment exceeds the minimum value of the trip current range but is not within the magnetic trip current threshold range, it is recorded as one thermal trip fault disconnection; when the working current value at the power-off moment exceeds the minimum value of the trip current range and there is a value within the magnetic trip current threshold range, it is recorded as one magnetic trip fault disconnection.

[0054] After the micro control unit 120 obtains the working state parameters of the circuit breaker 14 within a period of time, it makes a judgment on the next working state by synthesizing various working state parameter values or working state parameter change values. The other details of this step are similar to those of the above step S01. For specific details, please refer to step S01.

[0055] S110: If both the resistance value of the energized circuit and the temperature value of the circuit breaker 14 are within the standard value range, determine whether the working current value is less than the minimum value of the trip current threshold of the circuit breaker 14.

[0056] The standard value range refers to the threshold range in which the resistance value of the energized circuit of the circuit breaker 14 and the temperature value of the circuit breaker 14 are located under the normal working state of the circuit breaker 14. The resistance value of the energized circuit and the temperature value of the circuit breaker 14 are related to the working current value of the circuit breaker 14. Therefore, when both the resistance value of the energized circuit and the temperature value of the circuit breaker 14 are within the standard value range, further accurately monitoring the change of the working current value of the circuit breaker 14, the number of disconnections, and the disconnection type can confirm the working state of the circuit breaker 14.

[0057] Among them, the temperature standard value can be referred to: the maximum standard value of the temperature rise of the terminal of the circuit breaker 14 is 60K; the maximum standard value of the temperature rise of the terminal of the integrated leakage circuit breaker is 65K. The standard value of the resistance of the energized circuit can be referred to: the standard values specified for different specifications of the circuit breaker 14 are different. For example, the standard value of the air switch circuit breaker 14 is 10 milliohms.

[0058] S111: If the working current value is less than the minimum value of the tripping current threshold, determine whether the number of disconnections is less than the first number.

[0059] The tripping current threshold includes the thermal tripping current threshold and the magnetic tripping current threshold exceeding the thermal tripping current threshold. If it is detected that the current working current value is less than the minimum value of the tripping current threshold, that is, when the current working current value is less than the minimum value of the thermal tripping current threshold, the micro control unit 120 needs to determine whether the number of disconnections of the circuit breaker 14 is less than the first number to judge whether the working state of the circuit breaker 14 is normal.

[0060] S112: If the number of disconnections is less than or equal to the first number, output the current state of the circuit breaker 14 as the normal working state.

[0061] In the embodiment of the present application, the first number is 3 disconnections within a week. In the case that there has been no thermal tripping fault disconnection or magnetic tripping fault disconnection caused by the working current value exceeding the minimum value of the thermal tripping current threshold in the past, the micro control unit 120 determines that the current state of the circuit breaker 14 is the normal working state.

[0062] In addition, in addition to the Figure 4 steps shown, the circuit breaker monitoring method also includes the following situations and corresponding steps.

[0063] S121: If both the energized circuit resistance value and the temperature value of the circuit breaker 14 are in the first floating range, determine whether the working current value is within the tripping current threshold range of the circuit breaker 14.

[0064] Among them, the minimum value of the first floating range should be greater than or equal to the maximum value of the standard value range. The first floating range refers to the range where the values of the energized circuit resistance value and the temperature value of the circuit breaker 14 float upward within a certain time between 20% and 30%. The micro control unit 120 also needs to confirm whether the working current value has a situation of short-time exceeding the minimum value of the thermal tripping current threshold.

[0065] In one embodiment, to confirm the first floating range of the energized circuit resistance value and the temperature value of the circuit breaker 14, the minimum value of the first floating range can be preset as the maximum value of the corresponding standard value threshold, and the maximum value of the first floating range is 1.3 times the maximum value of the corresponding standard value threshold range.

[0066] S122: If the working current value is within the tripping current threshold range of the circuit breaker 14, output the current state of the circuit breaker 14 as the abnormal state.

[0067] When the working current value exceeds the minimum value of the tripping current threshold of the circuit breaker 14, it indicates that the circuit breaker 14 has had a tripping fault disconnection state. Based on the different threshold ranges to which the working current value belongs, the abnormal state of the circuit breaker 14 is further divided into an aging state and a fault state.

[0068] S123: If the working current value is within the tripping current threshold range of the circuit breaker 14 and the number of disconnections is greater than the first number, output that the circuit breaker 14 is in an aging state.

[0069] If the working current value briefly exceeds the minimum value of the tripping current threshold of the circuit breaker 14, that is, the working current value briefly exceeds the minimum value of the thermal tripping current threshold but does not enter the magnetic tripping current threshold range, the circuit breaker 14 will correspondingly experience a thermal tripping fault and disconnect, and this disconnection will be recorded as the number of thermal tripping disconnections. If the number of disconnections exceeds 3 times within a week or the total number of times during use exceeds 100 times, and all the disconnections are thermal tripping disconnections, then the microcontroller unit 120 confirms and outputs that the state of the circuit breaker 14 is in an aging state.

[0070] S124: If both the energized circuit resistance value and the temperature value of the circuit breaker 14 are within the second floating range, the working current value is within the tripping current threshold range, and the number of magnetic tripping times is greater than the second number, output that the circuit breaker 14 is in a faulty state.

[0071] Among them, the minimum value of the second floating range is greater than or equal to the maximum value of the first floating range. In one embodiment, the second floating range means that the values of the energized circuit resistance value and the temperature value of the circuit breaker 14 float upward by more than 30% within a certain period of time, and the frequency of the working current value exceeding the thermal tripping current threshold range increases, and the working current value within the magnetic tripping current threshold starts to appear. At this time, based on the number of disconnections of the circuit breaker 14 and the historical working current value, the number of magnetic tripping fault disconnections is judged to confirm whether the working state of the circuit breaker 14 is faulty.

[0072] The second number refers to the number of magnetic tripping fault disconnections being 3 times within a week or 9 times during the total usage period. If the number of magnetic tripping fault disconnections of the circuit breaker 14 exceeds the second number during use, then confirm and output that the current state of the circuit breaker 14 is in a faulty state.

[0073] In other embodiments of the present application, if during the use of the circuit breaker 14, the frequency of the circuit breaker 14 being faultily disconnected due to the working current value exceeding the short - circuit current exceeds 3 times within a week or exceeds 3 times during the total usage period of the circuit breaker 14, the microcontroller unit 120 also confirms that the circuit breaker 14 is in a faulty state and outputs the status information.

[0074] Among them, in one embodiment, the maximum value of the thermal trip current threshold (trip current threshold) can be referred to as follows: for products compliant with standard GB / T 10963.1, it is 1.45 times the rated current; for products compliant with standard GB / T 14048.2, it is 1.3 times the rated current. The value range of the magnetic trip current threshold can also be referred to as follows: for circuit breaker 14 curve products, it is between 3 times and 5 times the rated current; for circuit breaker 14 curve products, it is between 5 times and 10 times the rated current; for circuit breaker 14 curve products, it is between 10 times and 20 times the rated current. The short-circuit current is generally greater than 20 times the rated current, and the common values of the short-circuit current specified by electrical standards are 500A, 1500A, 3000A, 4500A, 6000A, 10000A, 15000A.

[0075] In the above embodiment, by obtaining the numerical values of multiple types of operating state parameters of the circuit breaker 14, the operating state of the circuit breaker 14 is comprehensively judged, and the state information of the circuit breaker 14 is output. When the circuit breaker 14 is operating normally, the display device 15 lights up green; when it is confirmed that the circuit breaker 14 is aging, it lights up yellow correspondingly; when it is confirmed that the circuit breaker 14 has a fault, it lights up red correspondingly.

[0076] In other embodiments of the present application, the operating state of the circuit breaker 14 can also be confirmed based on the change of a single type of operating state parameter. The operating state parameter can be the operating current value of the circuit breaker 14, the temperature value of the circuit breaker 14, the temperature change rate of the circuit breaker, the number of disconnections and disconnection types of the circuit breaker 14, and the on - circuit resistance value of the circuit breaker 14, etc. For example, when obtaining at least one operating state parameter of the circuit breaker 14, the operating state of the circuit breaker 14 is preferably judged based on the operating current value of the circuit breaker 14.

[0077] In another embodiment of the present application, it is also possible to judge whether the circuit breaker 14 is aging by calculating the resistance value of the contact internal resistance between the moving and static contacts of the circuit breaker 14. In the above embodiment, the micro - control unit 120 calculates the on - circuit resistance value of the circuit breaker 14 by obtaining the operating current value, the temperature value of the circuit breaker 14, etc. On this basis, the micro - control unit 120 can also obtain the resistance value of the contact internal resistance between the moving and static contacts of the circuit breaker 14 based on the resistance values of each thermal - link part in the circuit breaker 14. The specific formula is as follows:

[0078] R = R 触头接触内阻 +∑R 热链零件

[0079] Among them, the correlation formula between the resistance value of the contact internal resistance between the moving and static contacts and the contact pressure between the moving and static contacts is as follows:

[0080] R 触头接触内阻 = K c ÷(0.102F) m

[0081] Among them, F is the contact pressure between the moving and static contacts; R 触头接触内阻 is the resistance value of the internal contact resistance between the moving and static contacts; m is the contact form coefficient; K c is the correlation coefficient related to the contact material and surface condition.

[0082] Based on the resistance value of the internal contact resistance between the moving and static contacts of the circuit breaker 14, the contact pressure between the moving and static contacts in the closed state can be confirmed, and further whether the contact pressure between the moving and static contacts is small due to the aging of the circuit breaker 14 can be confirmed, and the working state information of the circuit breaker 14 is output and displayed in the corresponding state through the display device 15.

[0083] This application can solve the problem in the prior art that it is difficult to detect or judge the aging or failure of the circuit breaker 14 in time, and it is easy to have potential safety hazards in the circuit. This application corresponds to judge the current working state of the circuit breaker 14 by real-time monitoring and calculating the working state parameters related to the circuit breaker 14, and outputs the corresponding state information to prompt the operator to pay attention. After the micro control unit 120 outputs the state information, the circuit breaker 14 indicates it to the user through the indicator light, so that the user can perform timely maintenance or replacement on the terminal power distribution product 2 and the circuit breaker 14. Therefore, this application has the advantages of timely circuit breaker 14 state monitoring, high reliability and application safety.

[0084] Please refer to Figure 5 , Figure 5 which is the structural schematic diagram of the circuit breaker monitoring device 600 provided by an embodiment of this application. As Figure 5 shown, the device includes: an acquisition module 610, a first judgment module 620, a second judgment module 630, and an output module 640.

[0085] Among them, the acquisition module 610 is used to acquire the working state parameters of the circuit breaker 14 to be measured within a period of time, and the working state parameters include: the working current value of the circuit breaker 14, the on-circuit resistance value of the circuit breaker 14, the number of disconnections of the circuit breaker 14, and the temperature value of the circuit breaker 14; the first judgment module 620 is used to judge whether the working current value is less than the minimum value of the tripping current threshold of the circuit breaker 14 if both the on-circuit resistance value and the temperature value of the circuit breaker 14 are within the standard value range; the second judgment module 630 is used to judge whether the number of disconnections is less than the first number if the working current value is less than the minimum value of the tripping current threshold; the output module 640 is used to output the current state of the circuit breaker 14 as the normal working state if the number of disconnections is less than or equal to the first number.

[0086] In one embodiment, the first determination module 620 is further configured to: if both the energized circuit resistance value and the circuit breaker 14 temperature value are within the first floating range, determine whether the working current value is within the trip current threshold range of the circuit breaker 14; the output module 640 is further configured to: if the working current value is within the trip current threshold range of the circuit breaker 14, output the current state of the circuit breaker 14 as an abnormal state, where the minimum value of the first floating range is greater than or equal to the maximum value of the standard value range.

[0087] In one embodiment, the output module 640 is further configured to: if the working current value is within the trip current threshold range of the circuit breaker 14 and the number of disconnections is greater than the first number, output that the circuit breaker 14 is in an aging state.

[0088] In one embodiment, the output module 640 is further configured to: if both the energized circuit resistance value and the circuit breaker 14 temperature value are within the second floating range, the working current value is within the trip current threshold range, and the number of magnetic trips is greater than the second number, output that the circuit breaker 14 is in a faulty state; where the minimum value of the second floating range is greater than or equal to the maximum value of the first floating range.

[0089] For the implementation processes of the functions and actions of each module in the above device, specifically refer to the implementation processes of the corresponding steps in the above circuit breaker monitoring method, which will not be elaborated here.

[0090] In several embodiments provided in the present application, the disclosed device and method can also be implemented in other ways. The device embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architectures, functions, and operations of the device, method, and computer program product according to multiple embodiments of the present application. In this regard, each block in the flowchart or block diagram may represent a module, a program segment, or a part of code, and a module, a program segment, or a part of code contains one or more executable instructions for implementing the specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than marked in the accompanying drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, as well as the combination of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system for performing the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0091] In addition, in each embodiment of the present application, the various functional modules may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0092] An embodiment of the present application provides a computer-readable storage medium, which stores a computer program. The computer program can be executed by a processor 12 to complete the breaker monitoring method.

[0093] If a function is implemented in the form of a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in various embodiments of the present application. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories 10 (ROM, Read-Only Memory), random access memories 10 (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0094] The foregoing are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A circuit breaker monitoring method, characterized in that, The method includes: Obtaining the working state parameters of the circuit breaker to be tested within a period of time, where the working state parameters include: the working current value of the circuit breaker, the on - circuit resistance value of the circuit breaker, the number of disconnections of the circuit breaker, and the temperature value of the circuit breaker; If both the on - circuit resistance value and the temperature value of the circuit breaker are within the standard value range, determining whether the working current value is less than the minimum value of the tripping current threshold of the circuit breaker; If the working current value is less than the minimum value of the tripping current threshold, determining whether the number of disconnections is less than the first number; If the number of disconnections is less than or equal to the first number, outputting that the current state of the circuit breaker is the normal working state; If both the on - circuit resistance value and the temperature value of the circuit breaker are within the first floating - up interval, determining whether the working current value is within the tripping current threshold range of the circuit breaker; If the working current value is within the tripping current threshold range of the circuit breaker, outputting that the current state of the circuit breaker is the abnormal state, where the minimum value of the first floating - up interval is greater than or equal to the maximum value of the standard value range.

2. The method according to claim 1, wherein The abnormal state includes the aging state; the step of outputting that the current state of the circuit breaker is the abnormal state when the working current value is within the tripping current threshold range of the circuit breaker includes: If the working current value is within the tripping current threshold range of the circuit breaker and the number of disconnections is greater than the first number, outputting that the circuit breaker is in the aging state.

3. The method according to claim 1, wherein The number of disconnections of the circuit breaker includes the number of magnetic trips.

4. The method according to claim 3, wherein It further includes: If both the on - circuit resistance value and the temperature value of the circuit breaker are within the second floating - up interval, the working current value is within the tripping current threshold range, and the number of magnetic trips is greater than the second number, outputting that the circuit breaker is in the fault state; where the minimum value of the second floating - up interval is greater than or equal to the maximum value of the first floating - up interval.

5. The method according to claim 1, wherein The on - circuit resistance value of the circuit breaker is obtained in the following manner: Wherein, is the operating current value of the circuit breaker, R is the on - circuit resistance value of the circuit breaker, T is the temperature value of the circuit breaker, is the temperature change rate of the circuit breaker, k is a coefficient related to the contact material, surface condition and contact form, S is the cross - sectional area, C is the specific heat capacity, m is the mass, T a is the base environmental temperature value.

6. A circuit breaker monitoring device, characterized in that, The device includes: An acquisition module, configured to obtain the working state parameters of the circuit breaker to be tested within a period of time, where the working state parameters include: the working current value of the circuit breaker, the on - circuit resistance value of the circuit breaker, the number of disconnections of the circuit breaker, and the temperature value of the circuit breaker; A first judgment module, configured to determine whether the working current value is less than the minimum value of the tripping current threshold of the circuit breaker if both the on - circuit resistance value and the temperature value of the circuit breaker are within the standard value range; A second judgment module, configured to determine whether the number of disconnections is less than the first number if the working current value is less than the minimum value of the tripping current threshold; An output module, configured to output that the current state of the circuit breaker is the normal working state if the number of disconnections is less than or equal to the first number; The first judgment module is further configured to: if both the energized circuit resistance value and the circuit breaker temperature value are within the first floating range, determine whether the working current value is within the tripping current threshold range of the circuit breaker; the output module is further configured to: if the working current value is within the tripping current threshold range of the circuit breaker, output the current state of the circuit breaker as an abnormal state, where the minimum value of the first floating range is greater than or equal to the maximum value of the standard value range.

7. An electronic device, characterized in that, The electronic device includes: a circuit breaker; a detection device connected to the circuit breaker for detecting the working state parameters of the circuit breaker within a period of time; a processor connected to the detection device; a memory for storing instructions executable by the processor; wherein the processor is configured to execute the circuit breaker monitoring method according to any one of claims 1-5.

8. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, and the computer program can be executed by the processor to complete the circuit breaker monitoring method according to any one of claims 1-5.

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