Electric appliance safety detection method, device and system

Abstract

The embodiment of the application discloses a kind of electrical appliance safety detection method, device, system, electronic equipment and storage medium, it is related to power system safety detection technical field, by obtaining the electrical appliance operating parameter sent by circuit breaker, arc recognition result is determined;According to current parameter and voltage parameter in electrical appliance operating parameter, load identification is carried out, and the occurrence time of electrical appliance state change event is determined;If electrical appliance occurs arc event, then according to arc event occurrence time in arc parameter and the occurrence time of electrical appliance state change event, electrical appliance safety detection is carried out, and detection result is obtained, if detection result represents electrical appliance operating fault, then control circuit breaker is disconnected;The application is based on arc recognition result and the occurrence time of electrical appliance state change event, determines electrical appliance safety detection result, so improve the accuracy of fault arc identification, reduce the identification misjudgment of fault arc, in the case of guaranteeing power utilization safety, reduce the power loss caused by fault arc misconfiguration.

Description

Technical Field

[0001] This application relates to the field of power system safety testing technology, specifically to an electrical safety testing method, device, and system. Background Technology

[0002] Electrical fires remain a significant cause of residential fires, accounting for 52% of all identified fires. Fault arcs, caused by aging or damaged insulation, or short circuits, are particularly prevalent. These arcs are prolonged in duration, releasing substantial amounts of heat and posing a significant fire hazard to the surrounding environment, making them a direct cause of electrical fires.

[0003] In recent years, the technology for detecting arc faults has become increasingly mature. However, when detecting arc faults, there is still a 20% probability that a "good arc" (an arc generated at the moment of plugging or unplugging a plug) is mistakenly identified as a fault arc, causing false alarms and power outages, resulting in unnecessary power loss losses. Summary of the Invention

[0004] This application provides an electrical safety detection method, apparatus, and system to improve the problem of misjudgment of fault arc caused by the continuous maturation of existing fault arc monitoring technology.

[0005] On one hand, embodiments of this application provide an electrical safety testing method, including:

[0006] The electrical appliance operating parameters are acquired, and the arc identification result is determined based on the electrical appliance operating parameters; the arc identification result is used to characterize whether an arc event has occurred in the electrical appliance; the electrical appliance operating parameters include at least one electrical appliance current parameter, voltage parameter, and arc parameter;

[0007] Load identification is performed based on the current and voltage parameters in the electrical appliance operating parameters to determine the occurrence time of electrical appliance status change events;

[0008] If an electric arc event occurs in the electrical appliance, an electrical safety test is performed based on the occurrence time of the electric arc event and the occurrence time of the electrical appliance state change event in the electric arc parameters, and the test result is obtained.

[0009] If the detection result indicates an electrical malfunction, the circuit breaker is controlled to open, thereby controlling the electrical appliance to be in a shut-down state.

[0010] On the other hand, embodiments of this application provide an electrical safety detection device, including:

[0011] An arc detection module is used to acquire electrical appliance operating parameters and determine an arc detection result based on the electrical appliance operating parameters; the arc detection result is used to characterize whether an electric arc has occurred in the electrical appliance; the electrical appliance operating parameters include at least one electrical appliance current parameter, voltage parameter, and arc parameter;

[0012] The charge detection module is used to identify the load based on the current and voltage parameters in the electrical appliance's operating parameters, and to determine the occurrence time of electrical appliance status change events;

[0013] The safety detection module is used to perform electrical safety detection based on the occurrence time of the arc event and the occurrence time of the electrical state change event in the arc parameters if the electrical appliance experiences an arc event, and obtain the detection result.

[0014] The control module is used to control the circuit breaker to open if the detection result indicates an electrical malfunction, so as to control the electrical appliance to be in a shut-off state.

[0015] On the other hand, embodiments of this application provide an electrical safety detection system, the system including at least one circuit breaker, an electrical safety detection device, a memory, and a processor, each circuit breaker being connected to at least one electrical appliance, and each circuit breaker being communicatively connected to the electrical safety detection device through a gateway device;

[0016] The circuit breaker is used to collect the current parameters, voltage parameters, and arc parameters of the electrical appliance connected to the circuit breaker to obtain the electrical appliance operating parameters, and send the electrical appliance operating parameters to the electrical appliance safety detection device through the gateway device;

[0017] The electrical safety detection device is used to acquire the electrical operating parameters sent by the circuit breaker through the gateway device, determine the arc identification result based on the electrical operating parameters, perform load identification based on the current and voltage parameters in the electrical operating parameters, determine the occurrence time of the electrical state change event, and if the electrical appliance experiences an arc event, perform electrical safety detection based on the arc event occurrence time and the occurrence time of the electrical state change event in the arc parameters to obtain a detection result. If the detection result indicates an electrical malfunction, a control command is sent to the circuit breaker through the gateway device; the control command is used to control the circuit breaker to open, so as to control the electrical appliance to be in a shut-off state.

[0018] The circuit breaker is used to respond to the control command sent by the electrical safety detection device to control the circuit breaker to open, so as to control the electrical appliance to be in a shut-off state;

[0019] The memory stores a computer program, and the processor is used to run the computer program in the memory to perform the operations in the above-described electrical safety testing method;

[0020] The storage medium stores multiple instructions, which are adapted for loading by a processor to execute the steps in the above-described electrical safety detection method.

[0021] This application provides an electrical safety detection method, apparatus, and system, relating to the field of power system safety detection technology. It acquires electrical operating parameters sent by a circuit breaker, determines arc identification results based on these parameters, and the arc identification results indicate whether an electrical arc has occurred. The electrical operating parameters include at least one electrical appliance's current parameters, voltage parameters, and arc parameters. Load identification is performed based on the current and voltage parameters to determine the occurrence time of an electrical appliance state change event. If an arc event occurs, electrical safety detection is performed based on the arc event occurrence time and the electrical appliance state change event occurrence time in the arc parameters to obtain a detection result. If the detection result indicates abnormal electrical operation, the circuit breaker is controlled to open, thus controlling the electrical appliance to be in a shut-off state. This application determines the occurrence time of an electrical appliance state change event through load identification and determines the detection result based on the occurrence time of the electrical appliance state change event in the arc identification result. This improves the accuracy of fault arc identification, reduces misjudgment of fault arc identification, and reduces power outage losses caused by fault arc mismatch while ensuring power safety. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram illustrating the application scenario of the electrical safety testing method provided in this application in a household electricity usage setting;

[0024] Figure 2 This is a schematic diagram of the structure of the intelligent miniature circuit breaker provided in the embodiments of this application;

[0025] Figure 3 This is a schematic flowchart of the electrical safety testing method provided in the embodiments of this application;

[0026] Figure 4 This is a flowchart illustrating the fault arc identification method provided in an embodiment of this application;

[0027] Figure 5 This is a schematic flowchart of the circuit breaker control method provided in the embodiments of this application;

[0028] Figure 6 This is a schematic diagram of the electrical safety detection system provided in the embodiments of this application;

[0029] Figure 7 This is a schematic diagram of the electrical safety testing device provided in the embodiments of this application;

[0030] Figure 8 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0031] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that the invention will be more thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art.

[0032] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of the invention. However, those skilled in the art will recognize that the technical solutions of the invention can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of the invention.

[0033] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0034] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0035] It should be noted that "multiple" in this article refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0036] For example, taking a household electricity consumption scenario, such as Figure 1 As shown, Figure 1 This is a schematic diagram of the application scenario of the electrical safety testing method provided in this application in a household electricity usage scenario. The application scenario shown includes an intelligent miniature circuit breaker 130, a wireless gateway device 140, a cloud testing platform 110, and a mobile terminal 120.

[0037] In some implementations, the intelligent miniature circuit breaker 130 is communicatively connected to the wireless gateway device 140, and the cloud monitoring platform 110 is communicatively connected to the wireless gateway device 140 via the public network. The wireless gateway device 140 is connected to the public network and uploads the collected electrical operating parameters to the cloud monitoring platform 110 via the public network. The mobile terminal 120 communicates with the cloud monitoring platform 110 via the network.

[0038] In some implementations, the intelligent miniature circuit breaker detects electrical operating parameters in at least one circuit, such as Figure 1 As shown, three intelligent miniature circuit breakers are installed, each detecting the electrical operating parameters of the appliances in its circuit. Optionally, the intelligent miniature circuit breakers can be integrated into the smart meter at the point of sale, or they can be installed independently in the circuit.

[0039] Specifically, in Figure 1 In the application scenario shown, the intelligent miniature circuit breaker 130 collects the current, voltage, and arc parameters of the electrical appliances connected to it in the circuit, generates electrical appliance operating parameters, and uploads these parameters to the cloud detection platform 110 via the wireless gateway device 140. The cloud detection platform 110 receives the electrical appliance operating parameters uploaded by the intelligent miniature circuit breaker 130, determines whether an arc has occurred in the electrical appliances connected to it, obtains the arc identification result, and determines the appropriate parameters based on the current and voltage parameters in the electrical appliance operating parameters. The system performs load identification to determine the occurrence time of electrical appliance status change events. If an electrical arcing event occurs, electrical safety detection is performed based on the occurrence time of the arcing event in the arcing parameters and the occurrence time of the electrical appliance status change event. The detection results are obtained. If the detection results indicate that the electrical appliance is operating abnormally, a control command is sent to the intelligent miniature circuit breaker 130 through the wireless gateway device 140, and an alarm message is sent to the terminal device. The intelligent miniature circuit breaker 130 responds to the control command and controls the intelligent miniature circuit breaker 130 to disconnect, so as to control the electrical appliances connected to the intelligent miniature circuit breaker 130 to be in a shut-off state.

[0040] Optional, such as Figure 2As shown, the intelligent miniature circuit breaker 130 includes a circuit breaker module 131, a power supply module 132, a leakage current detection module 133, an arc detection module 134, and a communication module 135. The system includes: a power supply module 132 for supplying power to the intelligent miniature circuit breaker 130; a circuit breaker module 131 for controlling the closing and opening of the intelligent miniature circuit breaker 130; a leakage current detection module 133 for detecting leakage current based on the current and voltage parameters of the electrical appliances connected to the intelligent miniature circuit breaker 130, and reporting the leakage current event to the cloud detection platform 110 when a leakage current event is detected in the electrical appliances connected to the intelligent miniature circuit breaker 130, and the circuit breaker module 131 controlling the opening and closing of the intelligent miniature circuit breaker 130; an arc detection module 134 for detecting arc based on the current and voltage parameters of the electrical appliances connected to the intelligent miniature circuit breaker 130, determining whether an arc has occurred in the electrical appliances connected to the intelligent miniature circuit breaker 130, and generating the arc parameters of the electrical appliances; and a communication module 135 for enabling communication between the intelligent miniature circuit breaker 130 and the cloud detection platform 110, and uploading the operating parameters of the electrical appliances to the cloud detection platform 110.

[0041] Optionally, the cloud testing platform 110 includes a cloud server 111 and a device 112 for deploying an electrical safety testing system. The electrical safety testing system can be deployed within the cloud server 111, and the device 112 can be communicatively connected to the cloud server 111. In some embodiments, the device 112 for deploying the electrical safety testing system can be a server or a server cluster composed of servers.

[0042] The intelligent miniature circuit breaker 130 uploads electrical operating parameters to the cloud server 111. The device 112, which deploys the electrical safety detection system, accesses the cloud server 111 to obtain the electrical operating parameters sent by the intelligent miniature circuit breaker 130. Based on the electrical operating parameters, it determines whether an electric arc has occurred in the electrical appliance and obtains the arc identification result. Based on the current and voltage parameters in the electrical operating parameters, it performs load identification and determines the occurrence time of the electrical appliance state change event. If an electric arc event occurs in the electrical appliance, it performs electrical safety detection based on the occurrence time of the arc event and the occurrence time of the electrical appliance state change event in the arc parameters and obtains the detection result. If the detection result indicates that the electrical appliance is operating abnormally, it sends a control command to the intelligent miniature circuit breaker 130 and sends an alarm message to the terminal device. The intelligent miniature circuit breaker 130 responds to the control command and controls the intelligent miniature circuit breaker 130 to disconnect, thereby controlling the electrical appliances connected to the intelligent miniature circuit breaker 130 to be in a shut-off state.

[0043] Optionally, the mobile terminal 120 can be a mobile phone, tablet computer or other terminal device, or an application, such as an application that provides appliance control functions.

[0044] based on Figure 1As shown in the application scenario, this application provides an electrical safety testing method, such as... Figure 3 As shown, Figure 3 This is a schematic flowchart of the electrical safety testing method provided in the embodiments of this application. The electrical safety testing method shown can be performed by... Figure 1 The detection method can be executed by the Zhongyun detection platform 110, or by an electronic device with data processing capabilities; this application embodiment does not specifically limit this. Specifically, the electrical safety detection method shown includes at least steps 310 to 340, described in detail below:

[0045] Step 310: Obtain the electrical operating parameters and determine the arc identification result based on the electrical operating parameters.

[0046] Among them, the arc identification result indicates whether an electric arc event has occurred in the electrical appliance.

[0047] The electrical operating parameters include at least one electrical appliance's current parameter, voltage parameter, and arc parameter. The current parameter can be the appliance's transient current or steady-state current, and can be a current waveform. The voltage parameter can be the appliance's transient voltage or steady-state voltage. The arc parameter includes whether an arc event has occurred, the time of the arc event when it occurs, and the arc signal per unit time. The unit time can be 1 second, 1 ms, or 0.1 seconds; this embodiment does not specifically limit this.

[0048] In some implementations, the electrical operating parameters can be collected by the circuit breaker or by sensors installed in the circuit.

[0049] For example, taking the electrical operating parameters collected by the circuit breaker as an example, in some embodiments, the circuit breaker can collect the current parameters, voltage parameters, and arc parameters of the electrical appliances connected to the circuit breaker in the circuit in real time. The collected current parameters, voltage parameters, and arc parameters are determined as the electrical operating parameters, and the electrical operating parameters within the preset period are uploaded to the cloud detection platform 110 at intervals of a preset period. The preset period can be 1 second, 1 minute, 10 minutes, etc., and this embodiment does not specifically limit it.

[0050] In some implementations, the circuit breaker can collect data such as current parameters, voltage parameters, frequency, phase, and power of the electrical appliances connected to the circuit breaker in real time, perform arc detection based on the current and voltage parameters, detect arc events, locate the occurrence time of the arc event, generate arc parameters based on the occurrence time of the arc event, and obtain the operating parameters of the electrical appliances based on the arc parameters and the current and voltage parameters of the electrical appliances connected to the circuit breaker.

[0051] Optionally, based on current and voltage parameters, a change-point detection method can be used to track changes in the effective value or shape of the total current waveform to determine if a change point exists. If a change point exists, it is identified as the time of an arc event, and arc parameters are generated based on this time. If no change point exists, a preset indicator indicating that no arc event has occurred is used as the arc parameter. The change in the current waveform shape can be evaluated based on the information entropy of the current waveform data (such as sample entropy, permutation entropy, or multi-scale entropy). The total current waveform refers to the waveform of the total current in the circuit containing the circuit breaker.

[0052] Optionally, to further improve the accuracy of arc detection and reduce the amount of data for subsequent fault arc identification, the circuit breaker can, after determining the change point, obtain the vector difference of the steady-state current before and after the arc event occurs based on the voltage and current parameters, perform a true / false arc event detection based on the vector difference, and generate arc parameters based on the arc event occurrence time when the arc event is determined to be a real arc. Specifically, based on the voltage parameters and taking the positive zero-crossing point of the voltage waveform as the phase reference point, the vector difference of the steady-state current before and after the arc event occurs is calculated. Multi-dimensional features are extracted from the vector difference, including time-domain features and frequency-domain features, to form a multi-dimensional feature vector of the arc event. The circuit breaker identifies the arc based on the multi-dimensional feature vector of the arc event and determines the authenticity of the arc event. If the arc event is determined to be a real arc, it indicates that the electrical appliance has experienced a fault arc, and the circuit breaker issues an alarm and generates arc parameters based on the time of the arc event. If the arc event is a false arc, it indicates that the electrical appliance has experienced a normal arc, and the preset indication information indicating that no arc event has occurred is determined as the arc parameter. For example, "N" is determined as the arc parameter, and "0" is determined as the arc parameter.

[0053] Optionally, time-domain features include, but are not limited to, the maximum Euclidean distance (MED) and the zero current period (ZCP) that characterize the similarity between adjacent periods; frequency-domain features can be high-order harmonic distribution data of the vector difference current waveform obtained through short-time Fourier transform.

[0054] Optionally, the multidimensional feature vector of the arc event can be compared with a preset reference multidimensional feature vector of the arc event to determine the similarity between the multidimensional feature vector of the arc event and the preset reference multidimensional feature vector of the arc event. If the similarity is greater than or equal to the preset similarity threshold, the arc event is determined to be a real arc. If the similarity is less than the preset similarity threshold, the arc event is determined to be a fake arc.

[0055] In some implementations, after receiving the electrical operating parameters uploaded by the circuit breaker, it is determined whether an arc event has occurred in the electrical appliance based on the arc parameters in the electrical operating parameters, and an arc identification result is obtained. When it is determined that an arc event has occurred in the electrical appliance, the time of the arc event in the arc parameters is obtained.

[0056] Optionally, the presence of an arc event occurrence time in the arc parameters can be used to determine whether an electrical appliance has experienced an arc event, thus obtaining an arc identification result. Understandably, if an arc event occurrence time is present in the arc parameters, it is determined that an arc event has occurred in the appliance; if no arc event occurrence time is present in the arc parameters, it is determined that no arc event has occurred in the appliance.

[0057] Optionally, whether an electrical appliance has experienced an arcing event can be determined by detecting whether a preset indicator indicating that no arcing event has occurred exists in the arcing parameters, thus obtaining an arcing identification result. Understandably, if the preset indicator indicating that no arcing event has occurred exists in the arcing parameters, it is determined that no arcing event has occurred in the appliance; if the preset indicator indicating that no arcing event has occurred does not exist in the arcing parameters, it is determined that an arcing event has occurred in the appliance.

[0058] Optionally, if no arcing event occurs in the appliance, the arcing event can be determined based on the appliance's operating parameters received in the next cycle, and the arcing identification result for the next cycle can be obtained.

[0059] Step 320: Based on the current and voltage parameters in the electrical operating parameters, identify the load and determine the occurrence time of the electrical status change event.

[0060] Considering the limited computational power of circuit breakers, there is a possibility of misjudging fault arcs, i.e., identifying an arc generated at the moment of plugging or unplugging a device as a fault arc. If a control command is issued to the circuit breaker to open upon detecting a fault arc, unnecessary losses may occur. Furthermore, when a fault arc occurs in an appliance, the current, voltage, and active power in the circuit will change. Therefore, by analyzing the temporal relationship between the occurrence time of the appliance state change event and the arc occurrence time, it can be determined whether the changes in current, voltage, and active power in the circuit are caused by an arc, thus identifying the arc type and performing appliance safety detection to ensure circuit safety. Based on this, some implementations use charge identification based on appliance operating parameters to determine whether an appliance state change event has occurred in the circuit. When an appliance state change event occurs, the occurrence time of the event is determined, and appliance safety detection is performed based on the arc identification result and the occurrence time of the appliance state change event.

[0061] Optionally, a preset load identification model can be used to identify the current and voltage parameters in the electrical appliance's operating parameters to determine the timing of electrical state change events. The load identification model can be a machine learning model or a neural network model.

[0062] Optionally, the current and voltage parameters in the electrical appliance operating parameters can be preprocessed, and the preprocessed current and voltage parameters can be used for load identification to determine whether an electrical appliance start-stop event or an electrical appliance operating state change event has occurred in the circuit. If an electrical appliance start-stop event or an electrical appliance operating state change event has occurred in the circuit, the occurrence time of the electrical appliance operating state change event can be determined. If no electrical appliance start-stop event or electrical appliance operating state change event has occurred in the circuit, the type of electric arc can be determined to be a normal electric arc.

[0063] In some implementations, the total active power of the circuit in each unit time can be determined based on the preprocessed current and voltage parameters to obtain the total active power sequence of the circuit. The total active power sequence of the circuit is then differentially processed to obtain the total active power change sequence of the circuit. Based on the total active power change sequence of the circuit, it can be determined whether there is a total active power change point. If there is a total active power change point, the time corresponding to the total active power change point is determined as the occurrence time of the electrical state change event.

[0064] Optionally, the maximum total active power change value in the total active power change sequence can be compared with a preset total active power change threshold. If the maximum total active power change value is greater than or equal to the preset total active power change threshold, then a total active power change point is determined to exist; if the maximum total active power change value is less than the preset total active power change threshold, then no total active power change point is determined to exist.

[0065] Optionally, the transient voltage and transient current per unit time can be determined based on the current and voltage parameters. The current-voltage phase per unit time can be determined based on the transient voltage and transient current. The power factor of the circuit load per unit time can be obtained based on the current-voltage phase difference. The total active power per unit time can be obtained based on the power factor, transient voltage, and transient current per unit time.

[0066] Step 330: If an electric arc event occurs in the electrical appliance, an electrical safety test is performed based on the occurrence time of the electric arc event and the occurrence time of the electrical appliance state change event in the electric arc parameters, and the test results are obtained.

[0067] In some implementations, it can be determined whether an arc event has occurred based on the arc identification result, and when an arc event occurs, the type of arc can be determined by the arc event occurrence time and the electrical state change event occurrence time in the arc parameters, and the detection result can be determined based on the arc type.

[0068] Among them, the types of electric arcs include normal electric arcs and abnormal electric arcs.

[0069] Optionally, if the arc type is a normal arc, the test result is determined to be that the electrical appliance is operating normally; if the arc type is an abnormal arc, the test result is determined to be that the electrical appliance is operating abnormally.

[0070] Optionally, the occurrence time of the arc event in the arc parameters can be compared with the occurrence time of the electrical appliance state change event, and the type of arc can be determined based on the comparison result. For example, if the occurrence time of the arc event is earlier than the occurrence time of the electrical appliance state change event, it indicates that the arc event is not caused by an electrical appliance malfunction, and the type of arc is determined to be a normal arc. If the occurrence time of the arc event is later than the occurrence time of the electrical appliance state change event, it indicates that an electrical appliance malfunction has caused the arc event, and the type of arc is determined to be a fault arc.

[0071] Optionally, the time difference between the occurrence time of the arc event and the occurrence time of the electrical appliance state change event in the arc parameters can be determined. Based on the time difference, the correlation between the arc event and the electrical appliance state change event can be determined. The correlation can be compared with a preset correlation threshold. If the correlation is greater than or equal to the preset correlation threshold, the arc type is determined to be a fault arc. If the correlation is less than the preset correlation threshold, the arc type is determined to be a normal arc.

[0072] Optionally, the correlation between time difference and correlation can be determined by querying the mapping data between time difference and correlation degree. This mapping data includes multiple time difference ranges and the corresponding correlation degree for each range.

[0073] Step 340: If the detection result indicates that the electrical appliance is operating abnormally, the circuit breaker is opened to control the electrical appliance to be in a shut-off state.

[0074] In some implementations, if the detection results indicate that the electrical appliance is operating abnormally, it means that the type of arc is a fault arc. In order to ensure the safe operation of the circuit, a control command can be sent to the circuit breaker to control the circuit breaker to open, so as to control the electrical appliance to be in a shut-off state.

[0075] Optionally, when there are multiple circuit breakers, in order to ensure the safe operation of the circuit and reduce power outage losses, steps 310 to 330 above can be executed according to the electrical operating parameters uploaded by each circuit breaker to determine the target circuit breaker in the circuit where the fault arc is located, and a control command can be sent to the target circuit breaker to control the target circuit breaker to open.

[0076] The electrical safety detection method provided in this application determines the occurrence time of electrical state change events by load identification, and determines the detection result based on the arc identification result and the occurrence time of electrical state change events. This improves the accuracy of fault arc identification, reduces the misjudgment of fault arc identification, and reduces power outage losses caused by misidentification of fault arc while ensuring electrical safety.

[0077] In some implementations, to ensure the safe operation of electrical appliances and improve the accuracy of arc fault identification, when the arc identification result indicates that an arc event has occurred in the appliance, the occurrence time of the arc event can be compared with the occurrence time of the appliance state change event. If the occurrence time of the arc event is shorter than the occurrence time of the appliance state change event, the type of arc is determined based on the appliance current change state and the arc change state. Electrical safety testing is then performed based on the arc type to obtain the test results. This two-round arc fault identification, combining time and arc change state, improves the accuracy of arc fault identification, reduces the probability of false arc faults, and thus reduces power outage losses caused by false arc faults. Specifically, for example... Figure 4 As shown, Figure 4 This is a flowchart illustrating the arc fault identification method provided in this application embodiment, which includes steps 331 to 333:

[0078] Step 331: Compare the time of the arc event with the time of the electrical state change event.

[0079] Step 332: If the time of the arc event is longer than the time of the electrical state change event, then the type of arc is determined to be a normal arc.

[0080] Step 333: If the time of the arc event is less than the time of the electrical appliance state change event, then determine the electrical appliance current change state and the arc change state based on the electrical appliance operating parameters, and determine the type of arc based on the electrical appliance current change state and the arc change state.

[0081] Among them, the electrical current change state is used to characterize the change of electrical current within the time range corresponding to the electrical operating parameters. The electrical current change state includes current increase, current remain unchanged, and current decrease. The electric arc change state is used to characterize the change of electric arc size within the time range corresponding to the electrical operating parameters. The electric arc change state includes electric arc decrease, electric arc increase, and electric arc remain unchanged.

[0082] In some implementations, the transient current per unit time can be determined based on the current parameter in the electrical operating parameters, and differential processing can be performed on the transient current per unit time to obtain the transient current change sequence. The electrical current change state can be obtained from the current change value in the transient current change sequence.

[0083] Optionally, if the current change value in the transient current change sequence increases after the occurrence time of the electrical appliance state change event, the electrical appliance current change state is determined to be current increase; if the current change value in the transient current change sequence decreases after the occurrence time of the electrical appliance state change event, the electrical appliance current change state is determined to be current decrease; if the current change value in the transient current change sequence remains unchanged after the occurrence time of the electrical appliance state change event, the electrical appliance current change state is determined to be current constant.

[0084] In some implementations, the transient arc signal at each unit time in the arc parameters can be differentially processed to obtain a transient arc signal change sequence. Based on the transient arc signal change sequence, the arc change state can be determined according to the above-mentioned method for determining the electrical current change state.

[0085] Considering that when a fault arc occurs in a circuit, the size of the arc increases with the current, i.e., the size of the arc increases with the current, in some implementations, the change in the current of the electrical appliance and the change in the arc can be compared, and the type of arc can be determined based on the comparison results.

[0086] Specifically, the method for identifying the arc type based on the electrical current change state and the arc change state includes steps a1 to a3:

[0087] Step a1: Compare the change in electrical current with the change in electric arc.

[0088] In some implementations, the change in electrical current is compared with the change in electric arc. If both the change in electrical current and the change in electric arc are indicative of an increase in current, then the change in electrical current and the change in electric arc are determined to be a match. If the change in electrical current is not indicative of an increase in current, and / or the change in electric arc is not indicative of an increase in electric arc, then the change in electrical current and the change in electric arc are determined to be a mismatch.

[0089] Step a2: If the change in electrical current matches the change in arc, then the type of arc is determined to be a fault arc.

[0090] Step a3: If the change in electrical current does not match the change in arc, then the type of arc is determined to be a normal arc.

[0091] In some implementations, if the arc type is determined to be a fault arc, then step 340 above is executed to control the circuit breaker to open, so as to control the electrical appliance to be in a shut-off state; if the arc type is a normal arc, then based on the electrical appliance operating parameters sent by the circuit breaker in the next cycle, steps 310 to 330 above are executed to perform electrical appliance safety detection and obtain the detection results.

[0092] In some implementations, to further reduce power outage losses, when the detection results indicate that the electrical appliance is malfunctioning, i.e., when the arc type is determined to be a fault arc, an alarm message can be sent to the mobile terminal, and the above step 340 can be executed to control the circuit breaker to open, so as to control the electrical appliance to be in a shut-down state.

[0093] Considering the presence of multiple circuit breakers or a large number of electrical appliances connected to the circuit breaker, in order to reduce power outage losses and identify the types of electrical appliances that are malfunctioning, this application embodiment determines the type of the target electrical appliance with a fault arc among the electrical appliances connected to the circuit breaker based on the electrical appliance's operating parameters. Based on the type of the target electrical appliance, an alarm message is issued, and a control command is sent to the target circuit breaker connected to the target electrical appliance, thereby controlling the operation of the target electrical appliance and ensuring the safe operation of the circuit.

[0094] Specifically, such as Figure 5 As shown, Figure 5 This is a schematic flowchart of the circuit breaker control method provided in the embodiments of this application. The circuit breaker control method shown includes steps 341 to 343:

[0095] Step 341: Based on the current and voltage parameters in the electrical operating parameters, determine the type of the target electrical appliance that has a fault arc among the electrical appliances connected to the circuit breaker.

[0096] Among them, the type of appliance can be a category of appliance, including but not limited to induction cookers, refrigerators, air conditioners, televisions, rice cookers, etc.

[0097] In some implementations, current and voltage parameters can be input into a preset electrical appliance identification model to determine the type of the target electrical appliance among those connected to the circuit breaker that has experienced a fault arc. This electrical appliance identification model can be either a machine learning-based model or a neural network-based model.

[0098] In some implementations, transient current and transient voltage during the time interval between the occurrence and end time of an electrical state change event can be extracted from current and voltage parameters. Fourier and wavelet features are extracted based on the transient current during this time interval. The transient total active power during this time interval is obtained based on the transient current and transient voltage. The maximum value and root mean square error of the transient total active power and transient current during this time interval are calculated to obtain statistical features. VI curve features are extracted based on the transient current and transient voltage during this time interval. The extracted Fourier, wavelet, statistical, and VI curve features are identified as electrical state change event features. Electrical type identification is performed based on these features to determine the type of the target electrical appliance connected to the circuit breaker that experienced a fault arc.

[0099] Optionally, the characteristics of electrical appliance status change events can be input into a preset electrical appliance identification model to identify the type of electrical appliance among those connected to the circuit breaker that has a fault arc.

[0100] Optionally, the electrical appliance status change event characteristics can be compared with a preset feature library to identify and calculate the type of the target electrical appliance among those connected to the circuit breaker that experienced a fault arc. The preset feature library includes multiple electrical appliance types and the corresponding electrical appliance status change event characteristics for each type.

[0101] In some implementations, the K-nearest neighbor method can be used to compare the electrical state change event characteristics with the electrical state change event characteristics corresponding to each electrical type in a preset feature library to determine the electrical type of the target electrical appliance that has a fault arc among the electrical appliances connected to the circuit breaker.

[0102] In some implementations, the transient total active power data, transient current data, and steady-state current data of the electrical appliances connected to the circuit breaker during the time period of the electrical state change event can be determined based on current and voltage parameters. Based on these transient total active power data, transient current data, and steady-state current data, the electrical appliance type can be identified to determine the type of the target electrical appliance experiencing the fault arc. Specifically, the method for determining the type of the target electrical appliance includes steps b1 to b3:

[0103] Step b1: Based on the current and voltage parameters in the electrical operating parameters, determine the transient current data and steady-state current data of the electrical appliances connected to the circuit breaker during the time period in which the electrical state change event occurs.

[0104] The time period during which an electrical appliance state change event occurs refers to the time between the occurrence and end time of the electrical appliance state change event.

[0105] Step b2: Feature extraction is performed based on transient current data and steady-state current data to obtain feature values.

[0106] In some implementations, harmonic analysis can be performed on steady-state current data to extract the amplitude data of each harmonic, as well as the peak factor, kurtosis factor, skewness factor, impulse factor, margin factor, and waveform factor of transient current data, thereby obtaining eigenvalues. Specifically, methods for extracting eigenvalues ​​include:

[0107] (1) Extract the peak factor, kurtosis factor, skewness factor, impulse factor, margin factor and waveform factor of transient current data, perform harmonic analysis on steady-state current data, and extract the amplitude data of each harmonic.

[0108] (2) Based on the amplitude data of each harmonic and the amplitude data of the fundamental wave, the steady-state harmonic ratio is obtained.

[0109] (3) The steady-state harmonic ratio, peak factor, kurtosis factor, skewness factor, impulse factor, margin factor, and waveform factor are determined as the characteristic values ​​of the electrical appliance.

[0110] Step b3: Compare the feature values ​​with the preset load identification template library to identify the type of electrical appliance of the target electrical appliance that has a fault arc.

[0111] In some implementations, the similarity between the feature value and the preset feature value corresponding to each preset electrical appliance type in the preset load identification template library can be calculated to determine the target preset feature value with the highest similarity to the feature value, and the preset electrical appliance type corresponding to the target preset feature value can be determined as the electrical appliance type of the target electrical appliance that has a fault arc.

[0112] Optionally, the similarity between the feature value and the preset feature value corresponding to each preset electrical type in the preset load identification template library can be obtained by calculating the Euclidean distance or Mahalanobis distance between the feature value and the preset feature value corresponding to each preset electrical type in the preset load identification template library.

[0113] Step 342: Output alarm information based on the appliance type of the target appliance, and determine the target circuit breaker corresponding to the appliance type based on the appliance type of the target appliance.

[0114] In some implementations, the target circuit breaker can be obtained by querying preset mapping data between circuit breakers and appliance types based on the appliance type of the target appliance. The preset mapping data between circuit breakers and appliance types includes multiple circuit breakers and the appliance type of each appliance connected to them.

[0115] Step 343: Control the target circuit breaker to disconnect so that the target electrical appliance is in a shut-off state.

[0116] In some implementations, after determining the appliance type of the target appliance, an alarm message is output to the mobile terminal based on the appliance type of the target appliance to prompt the user that the target appliance has an operational fault, and a control command is sent to the target circuit breaker to control the target circuit breaker to open so that the target appliance is in a shut-down state.

[0117] To reduce the complexity of electrical safety detection methods and improve electrical safety, when an electrical state change event is detected, steps b1 to b3 above are executed to determine the target electrical appliance for which the electrical state change event occurred, based on the current and voltage parameters in the electrical appliance's operating parameters, as well as the occurrence and end times of the electrical state change event. Based on the target electrical appliance for which the electrical state change event occurred, an alarm message is sent to the mobile terminal.

[0118] The electrical safety detection method provided in this application determines the occurrence time of electrical state change events through load identification. When the arc identification result indicates that an electrical arc event has occurred, the type of arc is determined based on the occurrence time of the arc event and the occurrence time of the electrical state change event in the arc parameters. Safety detection is then performed based on the type of arc. This improves the accuracy of fault arc identification, reduces misjudgment of fault arc identification, and reduces power outage losses caused by fault arc mismatch while ensuring electrical safety.

[0119] To better implement the electrical safety testing method provided in the embodiments of this application, an electrical safety testing system is provided based on the electrical safety testing method, such as... Figure 6 As shown, Figure 6 This is a schematic diagram of the electrical safety testing system provided in the embodiments of this application. The electrical safety testing system includes an electrical safety testing device, a memory, a processor, and a storage medium. Each circuit breaker is connected to at least one electrical appliance, and each circuit breaker is communicatively connected to the electrical safety testing device through a gateway device.

[0120] Among them, the circuit breaker is used to collect the current parameters, voltage parameters and arc parameters of the electrical appliances connected to the circuit breaker, obtain the operating parameters of the electrical appliances, and send the operating parameters of the electrical appliances to the electrical safety detection device through the gateway device;

[0121] The electrical safety detection device is used to acquire electrical operating parameters sent by the circuit breaker through the gateway device, determine the arc identification result based on the electrical operating parameters, identify the load based on the current and voltage parameters in the electrical operating parameters, determine the occurrence time of the electrical state change event, and if the electrical appliance has an arc event, it performs electrical safety detection based on the arc event occurrence time in the arc parameters and the occurrence time of the electrical state change event to obtain the detection result. If the detection result indicates that the electrical appliance is operating abnormally, it sends a control command to the circuit breaker through the gateway device. The control command is used to control the circuit breaker to open so that the electrical appliance is in a shut-down state.

[0122] A circuit breaker is used to respond to control commands sent by an electrical safety detection device, thereby controlling the circuit breaker to open and keeping the electrical appliance in a shut-off state.

[0123] The memory stores a computer program, and the processor runs the computer program in the memory to perform the operations in any of the above embodiments of the electrical safety testing method.

[0124] The storage medium stores multiple instructions, which are adapted for loading by the processor to execute the steps in any of the above-mentioned electrical safety testing methods.

[0125] In some implementations, such as Figure 7 As shown, Figure 7 This is a schematic diagram of the electrical safety testing device provided in an embodiment of this application. The electrical safety testing device shown includes:

[0126] The arc identification module 701 is used to acquire the electrical operating parameters sent by the circuit breaker and determine the arc identification result. The arc identification result indicates whether an arc has occurred in the electrical appliance. The electrical operating parameters include the current parameter, voltage parameter and arc parameter of at least one electrical appliance.

[0127] The charge detection module 702 is used to identify the load based on the current and voltage parameters in the electrical appliance operating parameters and determine the occurrence time of the electrical appliance status change event;

[0128] The safety detection module 703 is used to perform electrical safety detection based on the occurrence time of the arc event and the occurrence time of the electrical state change event in the arc parameters if an electrical arc event occurs, and obtain the detection result.

[0129] The control module 704 is used to control the circuit breaker to open if the detection result indicates that the electrical appliance is operating abnormally, so as to control the electrical appliance to be in a shut-off state.

[0130] In some implementations, the security detection module 703 is used for:

[0131] The type of arc is determined based on the occurrence time of the arc event and the occurrence time of the electrical state change event in the arc parameters.

[0132] If the type of electric arc is a fault arc, then the electrical appliance is determined to be malfunctioning.

[0133] If the type of electric arc is a normal electric arc, then the electrical appliance is operating normally.

[0134] In some implementations, the security detection module 703 is used for:

[0135] Compare the time of occurrence of an electric arc event with the time of occurrence of an electrical state change event;

[0136] If the time of the arc event is longer than the time of the electrical appliance state change event, then the type of arc is determined to be a normal arc.

[0137] If the time of the arc event is less than the time of the electrical appliance state change event, then the electrical appliance current change state and arc change state are determined based on the electrical appliance operating parameters, and the type of arc is determined based on the electrical appliance current change state and arc change state.

[0138] In some implementations, the security detection module 703 is used for:

[0139] Compare the changes in electrical current with the changes in electric arc;

[0140] If the change in electrical current matches the change in electric arc, then the type of electric arc is determined to be a fault arc.

[0141] If the change in electrical current does not match the change in electric arc, then the type of electric arc is determined to be a normal electric arc.

[0142] In some implementations, the control module 704 is used for:

[0143] Based on the current and voltage parameters in the electrical operating parameters, determine the type of electrical appliance that is the target electrical appliance with fault arcing among the electrical appliances connected to the circuit breaker;

[0144] The alarm information is output based on the appliance type of the target appliance, and the target circuit breaker corresponding to the appliance type is determined based on the appliance type of the target appliance.

[0145] The target circuit breaker is disconnected to shut down the target electrical appliance.

[0146] In some implementations, the control module 704 is used for:

[0147] Based on the current and voltage parameters in the electrical operating parameters, determine the transient current data and steady-state current data of the electrical appliances connected to the circuit breaker during the time period when the electrical state change event occurs.

[0148] Feature extraction is performed based on transient current data and steady-state current data to obtain feature values;

[0149] The feature values ​​are compared with a preset load identification template library to identify the type of electrical appliance in which the fault arc occurred.

[0150] In some implementations, the control module 704 is used for:

[0151] Extract the peak factor, kurtosis factor, skewness factor, impulse factor, margin factor, and waveform factor from transient current data; perform harmonic analysis on steady-state current data; and extract the amplitude data of each harmonic.

[0152] The steady-state harmonic ratio is obtained based on the amplitude data of each harmonic and the fundamental frequency amplitude data;

[0153] Steady-state harmonic ratio, peak factor, kurtosis factor, skewness factor, impulse factor, margin factor, and waveform factor are determined as characteristic values ​​of electrical appliances.

[0154] In some implementations, the charge detection module 702 is used for:

[0155] Based on the current and voltage parameters in the electrical operating parameters, determine the total active power of the electrical appliances connected to the circuit breaker in each unit time.

[0156] The total active power in each unit of time is differentially processed to obtain the sequence of changes in the total active power of the electrical appliances connected to the circuit breaker.

[0157] Based on the total active power change sequence, determine whether there is a point of change in total active power;

[0158] If there is a change point in total active power, then the time corresponding to the change point in total active power is determined as the occurrence time of the electrical state change event.

[0159] The electrical safety detection device provided in this application determines the occurrence time of electrical state change events by load identification, and performs electrical safety detection based on the arc detection results and the occurrence time of electrical state change events. This improves the accuracy of fault arc identification, reduces misjudgment of fault arc identification, and reduces power outage losses caused by fault arc misconfiguration while ensuring electrical safety.

[0160] The electrical safety detection system provided in this application collects electrical operating parameters and uses an electrical safety detection device to identify fault arcs and loads based on the electrical operating parameters collected by the circuit breaker. Based on the arc identification results and the occurrence time of electrical state change events, electrical safety detection is performed, which improves the accuracy of fault arc identification, reduces misjudgment of fault arcs, and reduces power outage losses caused by fault arc misconfiguration while ensuring electrical safety.

[0161] This application also provides an electronic device, such as... Figure 8 As shown, it illustrates a structural schematic diagram of the electronic device involved in the embodiments of this application, specifically:

[0162] The electronic device may include components such as a processor 801 with one or more processing cores, a memory 802 with one or more computer-readable storage media, a power supply 803, and an input unit 804. Those skilled in the art will understand that... Figure 8 The electronic device structure shown does not constitute a limitation on the electronic device and may include more or fewer components than shown, or combine certain components, or have different component arrangements. Wherein:

[0163] The processor 801 is the control center of the electronic device. It connects various parts of the electronic device via various interfaces and lines. By running or executing software programs and / or modules stored in the memory 802, and by calling data stored in the memory 802, it performs various functions and processes data, thereby providing overall monitoring of the electronic device. Optionally, the processor 801 may include one or more processing cores; preferably, the processor 801 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications, and the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into the processor 801.

[0164] The memory 802 can be used to store software programs and modules. The processor 801 executes various functional applications and data processing by running the software programs and modules stored in the memory 802. The memory 802 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, application programs required for at least one function (such as sound playback function, image playback function, etc.), etc.; the data storage area may store data created according to the use of the electronic device, etc. In addition, the memory 802 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, the memory 802 may also include a memory controller to provide the processor 801 with access to the memory 802.

[0165] The electronic device also includes a power supply 803 that supplies power to the various components. Preferably, the power supply 803 can be logically connected to the processor 801 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The power supply 803 may also include one or more DC or AC power supplies, recharging systems, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0166] The electronic device may also include an input unit 804, which can be used to receive input digital or character information and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.

[0167] Although not shown, the electronic device may also include a display unit, etc., which will not be described in detail here. Specifically, in this embodiment, the processor 801 in the electronic device loads the executable files corresponding to the processes of one or more application programs into the memory 802 according to the following instructions, and the processor 801 runs the application programs stored in the memory 802 to realize various functions, as follows:

[0168] The electrical appliance operating parameters are acquired, and the arc identification result is determined based on the electrical appliance operating parameters. The arc identification result indicates whether an arc event has occurred in the electrical appliance. The electrical appliance operating parameters include at least one electrical appliance's current parameter, voltage parameter, and arc parameter.

[0169] Load identification is performed based on the current and voltage parameters in the electrical operating parameters to determine the occurrence time of electrical status change events;

[0170] If an electrical appliance experiences an arcing event, electrical safety testing is performed based on the arcing event occurrence time and the electrical appliance state change event occurrence time in the arcing parameters to obtain the test results.

[0171] If the test results indicate an electrical malfunction, the circuit breaker will be tripped to shut down the electrical appliance.

[0172] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by instructions, or by instructions controlling related hardware. These instructions can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0173] Therefore, embodiments of this application provide a storage medium storing a computer program that can be loaded by a processor to execute the steps of any of the electrical safety detection methods provided in this application. For example, the computer program can execute the following steps:

[0174] The electrical appliance operating parameters are acquired, and the arc identification result is determined based on the electrical appliance operating parameters. The arc identification result indicates whether an arc event has occurred in the electrical appliance. The electrical appliance operating parameters include at least one electrical appliance's current parameter, voltage parameter, and arc parameter.

[0175] Load identification is performed based on the current and voltage parameters in the electrical operating parameters to determine the occurrence time of electrical status change events;

[0176] If an electrical appliance experiences an arcing event, electrical safety testing is performed based on the arcing event occurrence time and the electrical appliance state change event occurrence time in the arcing parameters to obtain the test results.

[0177] If the test results indicate an electrical malfunction, the circuit breaker will be tripped to shut down the electrical appliance.

[0178] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0179] The storage medium may include: read-only memory (ROM), random access memory (RAM), disk or optical disk, etc.

[0180] Since the computer program stored in the storage medium can execute the steps of any of the electrical safety testing methods provided in the embodiments of this application, the beneficial effects that any of the electrical safety testing methods provided in the embodiments of this application can achieve can be realized. For details, please refer to the previous embodiments, which will not be repeated here.

[0181] The above provides a detailed description of an electrical safety testing method, apparatus, and system provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An electrical safety testing method, characterized in that, The method includes: The electrical appliance operating parameters are acquired, and the arc identification result is determined based on the electrical appliance operating parameters; the arc identification result indicates whether an arc event has occurred in the electrical appliance, and the electrical appliance operating parameters include at least one electrical appliance current parameter, voltage parameter and arc parameter; Load identification is performed based on the current and voltage parameters in the electrical appliance operating parameters to determine the occurrence time of electrical appliance status change events; If an electric arc event occurs in the electrical appliance, an electrical safety test is performed based on the occurrence time of the electric arc event and the occurrence time of the electrical appliance state change event in the electric arc parameters, and the test result is obtained. If the detection result indicates that the electrical appliance is operating abnormally, the circuit breaker will be opened to control the electrical appliance to be in a shut-off state.

2. The electrical safety testing method according to claim 1, characterized in that, The electrical safety detection is performed based on the occurrence time of the arc event and the occurrence time of the electrical state change event in the arc parameters, and the detection results are obtained, including: The type of electric arc is determined based on the occurrence time of the electric arc event and the occurrence time of the electrical state change event in the electric arc parameters. If the type of electric arc is a fault arc, then the electrical appliance is determined to be malfunctioning. If the type of electric arc is a normal electric arc, then the electrical appliance is confirmed to be operating normally.

3. The electrical safety testing method according to claim 2, characterized in that, Determining the type of arc based on the occurrence time of the arc event and the occurrence time of the electrical state change event in the arc parameters includes: The time of occurrence of the electric arc event is compared with the time of occurrence of the electrical appliance state change event; If the time of occurrence of the electric arc event is longer than the time of occurrence of the electrical appliance state change event, then the type of the electric arc is determined to be a normal electric arc; If the time of occurrence of the electric arc event is less than the time of occurrence of the electrical appliance state change event, then the electrical appliance current change state and the electric arc change state are determined according to the electrical appliance operating parameters, and the type of electric arc is determined according to the electrical appliance current change state and the electric arc change state.

4. The electrical safety testing method according to claim 3, characterized in that, The step of determining the type of electric arc based on the changes in the electrical current and the changes in the electric arc includes: The electrical current change state is compared with the arc change state; If the change in electrical current matches the change in arc, then the type of arc is determined to be a fault arc. If the change in electrical current does not match the change in electric arc, then the type of electric arc is determined to be a normal electric arc.

5. The electrical safety testing method according to claim 1, characterized in that, The control circuit breaker is disconnected to put the control electrical appliances in a shut-off state, including: Based on the current and voltage parameters in the electrical operating parameters, determine the type of electrical appliance that is the target electrical appliance with fault arcing among the electrical appliances connected to the circuit breaker; An alarm message is output based on the appliance type of the target appliance, and the target circuit breaker corresponding to the appliance type is determined based on the appliance type of the target appliance. The target circuit breaker is controlled to open, so that the target electrical appliance is in a shut-off state.

6. The electrical safety testing method according to claim 5, characterized in that, The step of determining the type of the target electrical appliance that has experienced a fault arc among the electrical appliances connected to the circuit breaker based on the current and voltage parameters in the electrical appliance's operating parameters includes: Based on the current and voltage parameters in the electrical operating parameters, determine the transient current data and steady-state current data of the electrical appliances connected to the circuit breaker during the time period in which the electrical appliance state change event occurs; Feature extraction is performed based on the transient current data and the steady-state current data to obtain feature values; The feature value is compared with a preset load identification template library to identify the type of electrical appliance in which the fault arc occurs.

7. The electrical safety testing method according to claim 6, characterized in that, The feature extraction based on the transient current data and the steady-state current data to obtain feature values ​​includes: Extract the peak factor, kurtosis factor, skewness factor, impulse factor, margin factor, and waveform factor from the transient current data; perform harmonic analysis on the steady-state current data; and extract the amplitude data of each harmonic. Based on the amplitude data of each subharmonic and the fundamental amplitude data, the steady-state harmonic ratio is obtained; The steady-state harmonic ratio, the peak factor, the kurtosis factor, the skewness factor, the impulse factor, the margin factor, and the waveform factor are determined as the characteristic values ​​of the electrical appliance.

8. The electrical safety testing method according to any one of claims 1 to 7, characterized in that, The step of identifying the load based on the electrical operating parameters and determining the occurrence time of the electrical status change event includes: Based on the current and voltage parameters in the electrical operating parameters, determine the total active power of the electrical appliances connected to the circuit breaker in each unit time. The total active power in each unit of time is differentially processed to obtain the sequence of changes in the total active power of the electrical appliances connected to the circuit breaker. Based on the total active power change sequence, determine whether there is a point of change in total active power; If there is a change point in the total active power, the time corresponding to the change point in the total active power is determined as the occurrence time of the electrical appliance state change event.

9. An electrical safety testing device, characterized in that, The device includes: An arc detection module is used to acquire electrical appliance operating parameters and determine an arc detection result based on the electrical appliance operating parameters; the arc detection result is used to characterize whether an electric arc has occurred in the electrical appliance; the electrical appliance operating parameters include at least one electrical appliance current parameter, voltage parameter, and arc parameter; The charge detection module is used to identify the load based on the current and voltage parameters in the electrical appliance's operating parameters, and to determine the occurrence time of electrical appliance status change events; The safety detection module is used to perform electrical safety detection based on the occurrence time of the arc event and the occurrence time of the electrical state change event in the arc parameters if the electrical appliance experiences an arc event, and obtain the detection result. The control module is used to control the circuit breaker to open if the detection result indicates an electrical malfunction, so as to control the electrical appliance to be in a shut-off state.

10. An electrical safety detection system, characterized in that, The system includes at least one circuit breaker, an electrical safety detection device, a memory, a processor, and a storage medium. Each circuit breaker is connected to at least one electrical appliance, and each circuit breaker is communicatively connected to the electrical safety detection device through a gateway device. The circuit breaker is used to collect the current parameters, voltage parameters, and arc parameters of the electrical appliance connected to the circuit breaker to obtain the electrical appliance operating parameters, and send the electrical appliance operating parameters to the electrical appliance safety detection device through the gateway device; The electrical safety detection device is used to acquire the electrical operating parameters sent by the circuit breaker through the gateway device, determine the arc identification result based on the electrical operating parameters, perform load identification based on the current and voltage parameters in the electrical operating parameters, determine the occurrence time of the electrical state change event, and if the electrical appliance experiences an arc event, perform electrical safety detection based on the arc event occurrence time and the occurrence time of the electrical state change event in the arc parameters to obtain the detection result. If the detection result indicates an electrical operating fault, send a control command to the circuit breaker through the gateway device. The control command is used to control the circuit breaker to open, so as to control the electrical appliance to be in a shut-off state; The circuit breaker is used to respond to the control command sent by the electrical safety detection device to control the circuit breaker to open, so as to control the electrical appliance to be in a shut-off state; The memory stores a computer program, and the processor is used to run the computer program in the memory to perform the operations in the electrical safety testing method as described in any one of claims 1 to 8; The storage medium stores a plurality of instructions adapted for loading by a processor to execute the steps of the electrical safety testing method as described in any one of claims 1 to 8.

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