Electric leakage detection method and system for electrical equipment

Abstract

The invention is applicable to the technical field of electric leakage detection, and particularly relates to an electric leakage detection method and system for electrical equipment, and the method comprises the steps: determining the electrical equipment and cables which need to be subjected to electric leakage detection, drawing an electrical plan, connecting all the electrical equipment and cables through employing a nearest neighbor algorithm, and generating a detection channel; a separation point is selected between two adjacent electrical devices in the detection channel, the detection channel is divided into a plurality of segments, each segment at least comprises one electrical device, attribute data of the electrical devices are collected, the risk level of each segment is configured, and the risk levels comprise high, middle and low. And creating wiring rules in one-to-one correspondence with the risk levels. According to the invention, by arranging the adjustable resistor, the segment where the electric leakage signal is located can be further refined and positioned, the detection sensitivity is enhanced, the accuracy of electric leakage position detection is ensured, and the electric leakage detection efficiency of the electrical equipment is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of leakage current detection technology, and in particular to a method and system for detecting leakage current in electrical equipment. Background Technology

[0002] Leakage detection refers to the process of monitoring and identifying current leakage in electrical systems or equipment. The causes of leakage may include insulation aging, damage, humid environment, or improper installation. Leakage can not only lead to equipment failure, but also pose safety hazards such as electric shock and fire.

[0003] In existing technologies, distributed sensors and data acquisition networks are generally used to collect current, voltage and leakage signals to a central monitoring system. Abnormal leakage is detected through algorithm analysis. However, this requires the construction of corresponding sensor networks and data processing systems, which is costly and technically demanding, and cannot perform end-to-end detection.

[0004] A pickup line, also known as an inductive pickup conductor, is used to collect and analyze leakage current signals by laying pickup lines on the surface of cables or electrical equipment and collecting the induced current signals in the pickup lines, thereby identifying leakage current in electrical equipment.

[0005] Therefore, "how to use the pickup line for leakage current detection" is the technical problem that this invention needs to solve. Summary of the Invention

[0006] The purpose of this invention is to provide a method and system for detecting leakage current in electrical equipment, so as to solve the problem of "how to use a pickup line for leakage current detection" mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A method for detecting leakage current in electrical equipment, the method comprising: Identify the electrical equipment and cables that need to be tested for leakage current, draw an electrical plan, and use the nearest neighbor algorithm to connect all electrical equipment and cables to generate detection channels; Between two adjacent electrical devices in the detection channel, a separation point is selected, and the detection channel is divided into several segments, each of which includes at least one electrical device. The attribute data of the electrical devices is collected, and the risk level of each segment is configured, including high, medium and low risk levels. A wiring rule corresponding to each risk level is created, and based on the wiring rule, a pickup line is laid along the detection channel. Define the dividing point as the deployment location of the sensing device, connect the pickup line to the sensing device, build a detection network, find the segments corresponding to high and medium risk levels and define them as hidden danger segments, and deploy several adjustable resistors in the pickup line of the hidden danger segment. When leakage current is detected in a segment via the sensing device, the corresponding segment is defined as an abnormal segment, the adjustment authority of the adjustable resistor is obtained, the abnormal segment is divided into several sub-segments, the abnormal segment is updated based on the leakage current, the attribute data of the abnormal segment is extracted and written into a preset template, a leakage current detection report is generated, and sent to a preset terminal.

[0008] Furthermore, the step of using the nearest neighbor algorithm to connect all electrical devices and cables to generate detection channels includes: Set the priority coefficient for each electrical device and cable, and adjust the detection channels; Collect factors affecting leakage current detection, including at least the environment and cable material, and mark these factors on the electrical plan.

[0009] Furthermore, the step of collecting attribute data of electrical equipment and configuring the risk level of each segment includes: Determine the evaluation indicators for risk levels, set the weight for each evaluation indicator, and calculate the risk score for each electrical device and cable based on the evaluation indicators and weights. The risk scores are clustered into several intervals, each of which corresponds to a risk level.

[0010] Furthermore, the step of creating a wiring rule that corresponds one-to-one with each risk level, and laying the pickup line along the detection channel based on the wiring rule, includes: Lay the pickup cable according to the described wiring rules; The wiring rules corresponding to high-risk levels are spiral, medium-risk levels are polygonal, and low-risk levels are straight.

[0011] Furthermore, the step of identifying the segments corresponding to high and medium risk levels and defining them as potential hazard segments, and deploying several adjustable resistors in the pickup lines of the potential hazard segments includes: The number of potentially hazardous sections was counted, and a trend chart was drawn with time on the horizontal axis and the number on the vertical axis. Redundant lines are deployed in the potentially hazardous section, and the leakage current is cross-verified.

[0012] Furthermore, the steps of obtaining the adjustment authority of the adjustable resistor, dividing the abnormal segment into several sub-segments, and updating the abnormal segment based on the leakage current include: A leakage current detection platform is constructed, and the leakage current, electrical plan, and deployment location are uploaded to the leakage current detection platform; Embed an adaptive detection module into the leakage current detection platform, grant adjustment permissions to all adjustable resistors, edit parsing rules, and update sub-segments and abnormal segments.

[0013] Furthermore, the system includes: The generation module is used to identify the electrical equipment and cables that need to be detected for leakage current, draw an electrical plan, connect all electrical equipment and cables using the nearest neighbor algorithm, and generate detection channels; The cabling module is used to select a separation point between two adjacent electrical devices in the detection channel and divide the detection channel into several segments, each of which includes at least one electrical device. It collects the attribute data of the electrical devices, configures the risk level of each segment, which includes high, medium and low risk levels, creates a cabling rule that corresponds one-to-one with each risk level, and lays the pickup line along the detection channel based on the cabling rule. The deployment module is used to define the dividing point as the deployment location of the sensing device, connect the pickup line to the sensing device, build a detection network, find the segments corresponding to high and medium risk levels and define them as hidden danger segments, and deploy several adjustable resistors in the pickup line of the hidden danger segment. The sending module is used to, via the sensing device, define the corresponding segment as an abnormal segment when leakage current is detected in the segment, obtain the adjustment authority of the adjustable resistor, divide the abnormal segment into several sub-segments, update the abnormal segment based on the leakage current, extract the attribute data of the abnormal segment and write it into a preset template, generate a leakage current detection report, and send it to a preset terminal.

[0014] Furthermore, the generation module includes: The setting unit is used to set the priority coefficient of each electrical device and cable, and to adjust the detection channel; The annotation unit is used to collect the influencing factors of leakage current detection, wherein the influencing factors include at least: environment and cable material, and to annotate the influencing factors on the electrical plan.

[0015] Furthermore, the wiring module includes: The calculation unit is used to determine the evaluation indicators for risk level, set the weight of each evaluation indicator, and calculate the risk score of each electrical device and cable based on the evaluation indicators and weights. Clustering units are used to cluster risk scores into several intervals, where each interval corresponds to a risk level.

[0016] Furthermore, the deployment module includes: A laying unit is used to lay pickup lines according to the wiring rules described above. The statistical unit is used to count the number of potential hazard sections and plot the trend of change with time on the horizontal axis and quantity on the vertical axis. The verification unit is used to deploy redundant lines in the potential hazard section and to cross-verify the leakage current.

[0017] Compared with the prior art, the beneficial effects of the present invention are: By establishing detection channels, electrical equipment and cables can be connected in an orderly manner, avoiding omissions or duplicate detections caused by haphazard deployment of pickup lines, ensuring the coverage of leakage current detection. By defining wiring rules, different wiring strategies can be adopted in areas with different risk levels, and the coverage density of pickup lines can be customized to enhance the sensitivity of leakage current detection in high-risk segments. By deploying adjustable resistors, the segment where the leakage current signal is located can be further refined to enhance the accuracy of leakage current location and ensure the accuracy of leakage current location detection, greatly improving the efficiency of leakage current detection for electrical equipment. Attached Figure Description

[0018] Figure 1 A flowchart illustrating the leakage current detection method for electrical equipment provided in an embodiment of the present invention; Figure 2 This is a first sub-flowchart of the electrical equipment leakage current detection method provided in an embodiment of the present invention; Figure 3 This is a second sub-flowchart of the electrical equipment leakage current detection method provided in the embodiments of the present invention; Figure 4 This is a third sub-flowchart of the electrical equipment leakage current detection method provided in the embodiments of the present invention; Figure 5 This is a fourth sub-flowchart of the electrical equipment leakage current detection method provided in the embodiments of the present invention; Figure 6 This is a block diagram of the electrical equipment leakage current detection system provided in an embodiment of the present invention; Figure 7 A block diagram of the generation module in the electrical equipment leakage current detection system provided in the embodiments of the present invention; Figure 8 A block diagram of the wiring module in the electrical equipment leakage current detection system provided in an embodiment of the present invention; Figure 9 A block diagram showing the composition of the deployment modules in the electrical equipment leakage current detection system provided in an embodiment of the present invention; Figure 10 This is a block diagram of the sending module in the electrical equipment leakage current detection system provided in an embodiment of the present invention. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] In Example 1, Figure 1The implementation flow of the electrical equipment leakage current detection method provided in the embodiment of the present invention is shown below in detail: S100: Identify the electrical equipment and cables that need to be tested for leakage current, draw an electrical plan, and use the nearest neighbor algorithm to connect all electrical equipment and cables to generate a detection channel.

[0021] In power distribution networks, electrical systems, or factory areas, identify the electrical equipment and cables that require leakage current detection. Electrical equipment can include power-consuming equipment and power distribution control equipment, while cables mainly refer to the connecting lines between equipment. Based on the layout of the electrical equipment and cables in the detection area, draw an electrical plan diagram. This diagram primarily represents the spatial distribution between equipment. Using the nearest neighbor algorithm, connect all electrical equipment and cables sequentially. The nearest neighbor algorithm involves progressively selecting the next node that is closest to the current node and has not yet been connected, thus sequentially linking all nodes to obtain the optimal route, which is the detection channel. Due to the complexity of the circuit network, one or more detection channels can be set up to achieve full coverage of all electrical equipment and cables.

[0022] S200: Select a separation point between two adjacent electrical devices in the detection channel and divide the detection channel into several segments, each segment including at least one electrical device. Collect the attribute data of the electrical devices, configure the risk level of each segment, including high, medium and low risk levels, create a wiring rule corresponding to each risk level, and lay the pickup line along the detection channel based on the wiring rule.

[0023] In the detection channel between two adjacent electrical devices, dividing points are selected, and the entire detection channel is divided into several segments using all these dividing points as boundaries. Each segment contains at least one electrical device; in other words, each segment consists of an electrical device and its corresponding cable. This method not only clearly identifies the physical extent of each detection channel segment but also allows for more precise fault location by using segments as the smallest unit of analysis in subsequent leakage current localization.

[0024] Collect attribute data for each electrical device, including but not limited to power load, insulation aging level, historical fault records, ambient humidity and temperature, specific location, and cable laying method. Assign a weight value to each attribute, calculate the total weight value for each electrical device, and classify the devices into high, medium, and low risk levels based on this total. Create corresponding wiring rules for each risk level. If multiple electrical devices exist in a segment, the highest risk level among them is used as the risk level for that segment. Specifically, for example, high-risk segments might use spiral winding or multi-turn coverage pickup cable laying methods, medium-risk segments might use moderately dense or zigzag pickup cable laying methods, and low-risk segments might use conventional linear laying methods. According to the wiring rules, pickup lines are laid in each segment. Pickup lines are a type of sensing wire used to sense and collect leakage current signals. Simply put, pickup lines are signal sensing wires that are closely attached to the cable or wrapped around the electrical equipment. Pickup lines can capture signals such as zero-sequence current changes, weak leakage current, leakage electric field signals caused by insulation damage, and characteristic currents of abnormal discharge on the surface of electrical equipment and cables through electromagnetic coupling.

[0025] S300: Define the separation point as the deployment location of the sensing device, connect the pickup line to the sensing device, build a detection network, find the segments corresponding to high and medium risk levels and define them as potential hazard segments, and deploy several adjustable resistors in the pickup line of the potential hazard segment.

[0026] Sensing devices are deployed at the dividing points. These devices primarily collect leakage current induced signals from the pickup lines, perform signal conversion and analysis. The sensors are installed at one end of the segment and connected to the pickup lines. Integrating all sensors and pickup lines creates a detection network capable of segmented and structured acquisition of leakage current characteristic signals from each segment. Segments corresponding to high and medium risk levels are defined as potential leakage current segments, which are more likely to experience insulation degradation, partial discharge, or leakage hazards. Several adjustable resistors, specifically connected in series, are deployed on the pickup lines of these potential leakage current segments to create controllable changes in electrical characteristics. When a sensor detects a leakage current signal, adjusting the resistance value of the adjustable resistors changes the electrical characteristics along the segment, thus determining the specific location of the leakage.

[0027] For example, three adjustable resistors, A, B, and C, are installed in a potentially hazardous section, dividing the section into four sub-segments: 1, 2, 3, and 4. When a leakage signal is detected in this section, the resistance values ​​of the three adjustable resistors A, B, and C are adjusted to their maximum values. If a leakage signal is still detected, the leakage location is in sub-segment 4 (assuming the sensor is connected to one side of sub-segment 4). If no leakage signal is detected, the leakage location is likely in sub-segment 1, 2, or 3. The resistance values ​​of adjustable resistors A and B are then adjusted to their maximum values, and the resistance value of adjustable resistor C is adjusted to its minimum value. The changes in the leakage signal are then observed. This process is repeated to continuously adjust the resistance values ​​of the adjustable resistors, thus pinpointing the specific sub-segment where the leakage occurs.

[0028] S400: When leakage current is detected in a segment via the sensing device, the corresponding segment is defined as an abnormal segment, the adjustment authority of the adjustable resistor is obtained, the abnormal segment is divided into several sub-segments, the abnormal segment is updated based on the leakage current, the attribute data of the abnormal segment is extracted and written into a preset template, a leakage current detection report is generated and sent to a preset terminal.

[0029] During leakage current detection, the pickup line transmits the leakage current signal within each segment to the corresponding sensing device along the detection channel. The sensing device monitors the leakage current intensity and changes in each segment in real time. When a leakage current signal is detected in a segment, that segment is defined as an abnormal segment. The adjustment authority of the adjustable resistor in the abnormal segment is obtained, and the resistance value of the adjustable resistor is adjusted through the remote control system. Specifically, the resistance values ​​of all adjustable resistors are adjusted to their maximum values ​​to form multiple open circuits. Based on the location of the open circuits, the abnormal segment is divided into multiple sub-segments. Through the above example, the specific sub-segments with leakage current are gradually located, and the located sub-segments are defined as abnormal segments. The attribute data of the abnormal segments are collected, and their specific location, aging degree, and ambient temperature and humidity are written into a preset template to generate a leakage current detection report. The leakage current detection report is then sent to a preset terminal, which is the terminal of the maintenance personnel of the electrical equipment.

[0030] In Example 2, Figure 2 The implementation flow of the electrical equipment leakage detection method provided by the embodiment of the present invention is shown below. The steps of using the nearest neighbor algorithm to connect all electrical equipment and cables to generate detection channels are described in detail below: S101: Set the priority coefficient for each electrical device and cable, and adjust the detection channel.

[0031] Based on the type and location of each electrical device, a priority coefficient is assigned to each electrical device and cable. The priority coefficient is mainly used to quantify the importance of electrical devices and cables in the circuit system. The higher the priority coefficient, the more critical the corresponding electrical device and cable are in leakage current detection. According to the priority coefficient, the original detection channels are adjusted, including removing electrical devices and cables with priority coefficients less than the threshold from the detection channels.

[0032] S102: Collect the influencing factors of leakage current detection, wherein the influencing factors include at least: environment and cable material, and mark the influencing factors on the electrical plan.

[0033] Identify the factors that may affect leakage current detection, i.e., influencing factors. These factors include the temperature and humidity of the electrical equipment and cables, as well as the surrounding metal structures or grounding conditions. Mark all influencing factors on the electrical plan to generate an electrical layout diagram with environmental and material labels. This marking not only provides accurate reference data for leakage current detection but also provides data reference for risk level assessment, pick-up line layout strategies, and abnormal section location.

[0034] In Example 3, Figure 3 The implementation flow of the electrical equipment leakage detection method provided by the embodiment of the present invention is shown below. The steps of collecting the attribute data of the electrical equipment and configuring the risk level of each segment are described in detail below: S201: Determine the evaluation indicators for risk levels, set the weight of each evaluation indicator, and calculate the risk score for each electrical device and cable based on the evaluation indicators and weights.

[0035] The evaluation indicators for risk level are determined. For example, the evaluation indicators include: sub-segment power load, insulation aging degree and historical fault records, etc. A weight value is set for each evaluation indicator. The weight values ​​of all evaluation indicators are superimposed to obtain the risk score. The correspondence between the evaluation indicators and the weight values ​​is stored in a lookup table.

[0036] For example, when the insulation aging degree of electrical equipment or cable is low, the weight value is 1; when the aging degree is medium, the weight value is 3; when the aging degree is high, the weight value is 6; when the historical fault record of electrical equipment or cable is no fault, the weight value is 1; when the historical fault record is occasional fault, the weight value is 3; when the historical fault record is frequent fault, the weight value is 5; if the aging degree of a certain electrical equipment is medium and the historical fault record is occasional fault, then the corresponding risk score is 3+3=6.

[0037] S202: Cluster the risk scores into several intervals, where each interval corresponds to a risk level.

[0038] The risk score is divided into multiple intervals. For example, 0-3 is divided into the first interval, and 3-5 is divided into the second interval. Overlapping endpoints are included in the former, and a corresponding risk level is set for each interval.

[0039] In Example 4, Figure 4 The implementation flow of the electrical equipment leakage detection method provided by the embodiment of the present invention is shown below. The steps of creating wiring rules corresponding one-to-one with each risk level and laying pickup lines along the detection channel based on the wiring rules are described in detail below: S301: Lay the pickup line according to the wiring rules, wherein the wiring rule corresponding to the high-risk level is: spiral, the wiring rule corresponding to the medium-risk level is: zigzag, and the wiring rule corresponding to the low-risk level is: straight.

[0040] When laying the pickup lines, different routing rules are set for segments with different risk levels. In segments corresponding to high risk levels, the pickup lines are laid in a spiral pattern; in segments corresponding to medium risk levels, they are laid in a zigzag pattern; and in segments corresponding to low risk levels, they are laid in a straight line pattern. It can be seen that the higher the risk level, the higher the density of the pickup lines.

[0041] In Example 5, Figure 4 The implementation flow of the electrical equipment leakage detection method provided by an embodiment of the present invention is illustrated. The following details the steps of identifying the segments corresponding to high and medium risk levels, defining them as hidden danger segments, and deploying several adjustable resistors in the pickup lines of the hidden danger segments: S302: Count the number of sections with potential hazards, and plot a trend chart with time on the horizontal axis and quantity on the vertical axis.

[0042] The number of potential hazard segments in all segments is counted and dynamically updated. A trend chart is plotted with time on the horizontal axis and the number at the corresponding time on the vertical axis.

[0043] S303: Deploy redundant lines in the potentially hazardous section and cross-verify the leakage current.

[0044] In addition to deploying pickup lines in all segments, redundant lines can also be deployed in the segments with potential hazards. The redundant lines are mainly used to ensure that leakage current signals can still be collected normally when the main pickup line fails or the signal is abnormal, thereby improving the reliability and fault tolerance of leakage current detection. They can also enhance the collection capability of leakage current signals in the segments with potential hazards.

[0045] In Example 6, Figure 5The implementation flow of the electrical equipment leakage current detection method provided by an embodiment of the present invention is illustrated. The following details the steps of obtaining the adjustment permission of the adjustable resistor, dividing the abnormal segment into several sub-segments, and updating the abnormal segment based on the leakage current, as follows: S401: Construct a leakage current detection platform and upload the leakage current, electrical plan diagram and deployment location to the leakage current detection platform.

[0046] The leakage current data, electrical plan, and deployment locations of each pickup line and redundant line collected on-site are uploaded to the leakage current detection platform for unified modeling and management.

[0047] S402: Embed an adaptive detection module into the leakage current detection platform, grant adjustment permissions to all adjustable resistors, edit parsing rules, and update sub-segments and abnormal segments.

[0048] An adaptive detection module is embedded into the leakage current detection platform. This module can receive leakage current data from each segment in real time, analyze current change trends, and dynamically adjust the detection strategy based on the detection results. The adaptive detection module is granted access to adjust all adjustable resistors, enabling the leakage current detection platform to precisely control the resistance value of each adjustable resistor according to the specific characteristics of the abnormal segment or sub-segment, thereby quickly identifying the abnormal segment.

[0049] Figure 6 This diagram illustrates the structural composition of an electrical equipment leakage current detection system provided in an embodiment of the present invention. The electrical equipment leakage current detection system 1 includes: The generation module 11 is used to identify the electrical equipment and cables that need to be detected for leakage current, draw an electrical plan, connect all electrical equipment and cables using the nearest neighbor algorithm, and generate detection channels. The cabling module 12 is used to select a separation point between two adjacent electrical devices in the detection channel and divide the detection channel into several segments, each segment including at least one electrical device, collect the attribute data of the electrical devices, configure the risk level of each segment, where the risk level includes: high, medium and low, create a cabling rule corresponding to each risk level, and lay the pickup line along the detection channel based on the cabling rule; Deployment module 13 is used to define the separation point as the deployment location of the sensing device, connect the pickup line to the sensing device, build a detection network, find the segments corresponding to high and medium risk levels and define them as hidden danger segments, and deploy several adjustable resistors in the pickup line of the hidden danger segment. The sending module 14 is used to, via the sensing device, when a leakage current is detected in a segment, define the corresponding segment as an abnormal segment, obtain the adjustment permission of the adjustable resistor, divide the abnormal segment into several sub-segments, update the abnormal segment based on the leakage current, extract the attribute data of the abnormal segment and write it into a preset template, generate a leakage current detection report, and send it to a preset terminal.

[0050] Figure 7 This diagram illustrates the structural composition of an electrical equipment leakage current detection system provided in an embodiment of the present invention. The generation module 11 includes: Setting unit 111 is used to set the priority coefficient of each electrical device and cable, and to adjust the detection channel; The annotation unit 112 is used to collect the influencing factors of leakage current detection, wherein the influencing factors include at least: environment and cable material, and to annotate the influencing factors on the electrical plan diagram.

[0051] Figure 8 This diagram illustrates the structural composition of an electrical equipment leakage current detection system provided in an embodiment of the present invention. The wiring module 12 includes: The calculation unit 121 is used to determine the evaluation indicators for risk level, set the weight of each evaluation indicator, and calculate the risk score of each electrical device and cable through the evaluation indicators and weights. Clustering unit 122 is used to cluster risk scores into several intervals, where each interval corresponds to a risk level.

[0052] Figure 9 This diagram illustrates the structural composition of an electrical equipment leakage current detection system provided in an embodiment of the present invention. The deployment module 13 includes: The laying unit 131 is used to lay the pickup line according to the wiring rules. Statistical unit 132 is used to count the number of potential hazard sections and plot a trend graph with time on the horizontal axis and quantity on the vertical axis. Verification unit 133 is used to deploy redundant lines in the potential hazard section and to cross-verify the leakage current.

[0053] Figure 10 This diagram illustrates the structural composition of an electrical equipment leakage current detection system provided in an embodiment of the present invention. The transmitting module 14 includes: Upload unit 141 is used to construct a leakage current detection platform and upload the leakage current, electrical plan diagram and deployment location to the leakage current detection platform; The update unit 142 is used to embed an adaptive detection module into the leakage current detection platform, grant adjustment permissions to all adjustable resistors, edit parsing rules, and update sub-segments and abnormal segments.

[0054] The generation module 11 is mainly used to complete step S100, the wiring module 12 is mainly used to complete step S200, the deployment module 13 is mainly used to complete step S300, and the sending module 14 is mainly used to complete step S400. The setting unit 111 is mainly used to complete step S101, and the labeling unit 112 is mainly used to complete step S102. The calculation unit 121 is mainly used to complete step S201, and the clustering unit 122 is mainly used to complete step S202. The laying unit 131 is mainly used to complete step S301, the statistics unit 132 is mainly used to complete step S302, and the verification unit 133 is mainly used to complete step S303. The upload unit 141 is mainly used to complete step S401, and the update unit 142 is mainly used to complete step S402.

[0055] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

[0057] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for detecting leakage current in electrical equipment, characterized in that, The method includes: Identify the electrical equipment and cables that need to be tested for leakage current, draw an electrical plan, and use the nearest neighbor algorithm to connect all electrical equipment and cables to generate detection channels; Between two adjacent electrical devices in the detection channel, a separation point is selected, and the detection channel is divided into several segments, each of which includes at least one electrical device. The attribute data of the electrical devices is collected, and the risk level of each segment is configured, including high, medium and low risk levels. A wiring rule corresponding to each risk level is created, and based on the wiring rule, a pickup line is laid along the detection channel. Define the dividing point as the deployment location of the sensing device, connect the pickup line to the sensing device, build a detection network, find the segments corresponding to high and medium risk levels and define them as hidden danger segments, and deploy several adjustable resistors in the pickup line of the hidden danger segment. When leakage current is detected in a segment via the sensing device, the corresponding segment is defined as an abnormal segment, the adjustment authority of the adjustable resistor is obtained, the abnormal segment is divided into several sub-segments, the abnormal segment is updated based on the leakage current, the attribute data of the abnormal segment is extracted and written into a preset template, a leakage current detection report is generated, and sent to a preset terminal.

2. The method for detecting leakage current in electrical equipment according to claim 1, characterized in that, The step of using the nearest neighbor algorithm to connect all electrical equipment and cables to generate detection channels includes: Set the priority coefficient for each electrical device and cable, and adjust the detection channels; Collect factors affecting leakage current detection, including at least the environment and cable material, and mark these factors on the electrical plan.

3. The method for detecting leakage current in electrical equipment according to claim 1, characterized in that, The step of collecting attribute data of electrical equipment and configuring the risk level of each segment includes: Determine the evaluation indicators for risk levels, set the weight for each evaluation indicator, and calculate the risk score for each electrical device and cable based on the evaluation indicators and weights. The risk scores are clustered into several intervals, each of which corresponds to a risk level.

4. The method for detecting leakage current in electrical equipment according to claim 1, characterized in that, The step of creating a wiring rule that corresponds one-to-one with each risk level, and laying the pickup line along the detection channel based on the wiring rule, includes: Lay the pickup cable according to the described wiring rules; The wiring rules corresponding to high-risk levels are spiral, medium-risk levels are polygonal, and low-risk levels are straight.

5. The method for detecting leakage current in electrical equipment according to claim 1, characterized in that, The steps of identifying the segments corresponding to high and medium risk levels, defining them as potential hazard segments, and deploying several adjustable resistors in the pickup lines of these potential hazard segments include: The number of potentially hazardous sections was counted, and a trend chart was drawn with time on the horizontal axis and the number on the vertical axis. Redundant lines are deployed in the potentially hazardous section, and the leakage current is cross-verified.

6. The method for detecting leakage current in electrical equipment according to claim 5, characterized in that, The steps of obtaining the adjustment authority of the adjustable resistor, dividing the abnormal segment into several sub-segments, and updating the abnormal segment based on the leakage current include: A leakage current detection platform is constructed, and the leakage current, electrical plan, and deployment location are uploaded to the leakage current detection platform; Embed an adaptive detection module into the leakage current detection platform, grant adjustment permissions to all adjustable resistors, edit parsing rules, and update sub-segments and abnormal segments.

7. An electrical equipment leakage current detection system, characterized in that, The system includes: The generation module is used to identify the electrical equipment and cables that need to be detected for leakage current, draw an electrical plan, connect all electrical equipment and cables using the nearest neighbor algorithm, and generate detection channels; The cabling module is used to select a separation point between two adjacent electrical devices in the detection channel and divide the detection channel into several segments, each of which includes at least one electrical device. It collects the attribute data of the electrical devices, configures the risk level of each segment, which includes high, medium and low risk levels, creates a cabling rule that corresponds one-to-one with each risk level, and lays the pickup line along the detection channel based on the cabling rule. The deployment module is used to define the dividing point as the deployment location of the sensing device, connect the pickup line to the sensing device, build a detection network, find the segments corresponding to high and medium risk levels and define them as hidden danger segments, and deploy several adjustable resistors in the pickup line of the hidden danger segment. The sending module is used to, via the sensing device, define the corresponding segment as an abnormal segment when leakage current is detected in the segment, obtain the adjustment authority of the adjustable resistor, divide the abnormal segment into several sub-segments, update the abnormal segment based on the leakage current, extract the attribute data of the abnormal segment and write it into a preset template, generate a leakage current detection report, and send it to a preset terminal.

8. The electrical equipment leakage current detection system according to claim 7, characterized in that, The generation module includes: The setting unit is used to set the priority coefficient of each electrical device and cable, and to adjust the detection channel; The annotation unit is used to collect the influencing factors of leakage current detection, wherein the influencing factors include at least: environment and cable material, and to annotate the influencing factors on the electrical plan.

9. The electrical equipment leakage current detection system according to claim 7, characterized in that, The wiring module includes: The calculation unit is used to determine the evaluation indicators for risk level, set the weight of each evaluation indicator, and calculate the risk score of each electrical device and cable based on the evaluation indicators and weights. Clustering units are used to cluster risk scores into several intervals, where each interval corresponds to a risk level.

10. The electrical equipment leakage current detection system according to claim 7, characterized in that, The deployment module includes: A laying unit is used to lay pickup lines according to the wiring rules described above. The statistical unit is used to count the number of potential hazard sections and plot the trend of change with time on the horizontal axis and quantity on the vertical axis. The verification unit is used to deploy redundant lines in the potential hazard section and to cross-verify the leakage current.

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