Circuit electric leakage detection method and device, electric leakage detector and medium

Abstract

The invention relates to the field of line electric leakage detection, in particular to a line electric leakage detection method and device, an electric leakage detector and a medium. The method comprises the steps of determining a working current coefficient range corresponding to each line branch based on line information and an output current obtained in real time by obtaining line information corresponding to a current circuit, including line branches, branch loads and branch working states, and combining a theoretical current range with an actual line condition, so as to obtain a working current coefficient range corresponding to each line branch; and a scientific basis is provided for electric leakage judgment. And then, collecting the current branch current corresponding to the line branch in real time to ensure the timeliness and accuracy of data, judging whether the leakage fault of the line branch exists or not based on the working current coefficient range and the current branch current, and comparing the actual current with the preset current range to accurately identify the leakage fault.

Description

Technical Field

[0001] The present application relates to the field of line leakage detection, and in particular to a line leakage detection method, device, leakage detector and medium. Background Art

[0002] In electrical systems, line safety is an important prerequisite for ensuring the normal operation of power supply and electrical equipment. With the development of society and the advancement of technology, various complex circuits are being used more and more widely, which not only improves the convenience and efficiency of production and life, but also brings higher safety risks. Especially in industrial production and household electricity environments, line leakage is one of the common safety hazards, which may lead to serious accidents such as fire and electric shock. Therefore, how to effectively detect and prevent line leakage has become a technical problem that needs to be solved urgently.

[0003] To meet this challenge, existing technical means generally use traditional leakage protectors (such as residual current operated circuit breakers) to monitor the leakage of the entire system. These devices detect the change of zero-sequence current in the main circuit to determine whether there is leakage, and cut off the power supply when the preset threshold is reached, thereby achieving the protection function. Although the above method can alleviate the line leakage problem to a certain extent, the traditional leakage protector can only detect large-scale leakage events of the entire line, but it is powerless for small-scale leakage signals of a single branch. Summary of the invention

[0004] In order to achieve accurate detection of line leakage, the present application provides a line leakage detection method, device, leakage detector and medium.

[0005] In a first aspect, the present application provides a line leakage detection method, which adopts the following technical solution: A line leakage detection method, comprising: Obtaining line information corresponding to the current circuit, and obtaining the output current corresponding to the current circuit in real time, wherein the line information includes line branches, branch loads, and branch working states; Based on the line information and the output current, determining a working current coefficient range corresponding to each of the line branches; Real-time acquisition of current branch current corresponding to line branches; Based on the operating current coefficient range and the current branch current, it is determined whether there is a leakage fault in the line branch.

[0006] By adopting the above technical solution, the line information corresponding to the current circuit is obtained, including line branches, branch loads and branch working status. Based on the line information and the output current obtained in real time, the working current coefficient range corresponding to each line branch is determined, and the theoretical current range is combined with the actual line conditions to provide a scientific basis for leakage judgment. Next, the current branch current corresponding to the line branch is collected in real time to ensure the timeliness and accuracy of the data. Based on the working current coefficient range and the current branch current, it is determined whether there is a line branch leakage fault. The actual current is compared with the preset current range, and the leakage fault can be accurately identified.

[0007] In a possible implementation manner, based on the line information and the output current, a working current coefficient range corresponding to each of the line branches is determined, and a process of determining the working current coefficient range corresponding to each of the line branches includes: Determining a load current corresponding to the line branch, and determining a current loss corresponding to the line branch; Based on the current loss and the load current, determining the operating current corresponding to the line branch; Based on the working current and the output current, a working current coefficient range corresponding to the line branch is determined.

[0008] By adopting the above technical solution, based on line information and output current, the load current and current loss of each line branch are determined, and then the working current is calculated. According to the relationship between the working current and the output current, the working current coefficient range of each branch is determined, thereby accurately reflecting the actual current condition of each branch, effectively identifying and warning of potential leakage faults, improving the accuracy and efficiency of leakage detection, and ensuring the safe and stable operation of the power system.

[0009] In a possible implementation, the branch operating state includes a load operating state of each load on the branch, the load operating state is startup, operation or standby, and the determining the load current corresponding to the line branch includes: Based on the load working state corresponding to each load, obtaining the load power of each load corresponding to the line branch; Based on the working state of each load, determining a calculation formula corresponding to each load; Based on the load power of each load and the corresponding calculation formula, the load current corresponding to the line branch is determined.

[0010] By adopting the above technical solution, the working status of each load (startup, working or standby) is analyzed, the corresponding load power is obtained, and the corresponding calculation formula is selected according to different working states, and finally the load current of the line branch is determined, thereby accurately reflecting the actual energy consumption of each load on the branch, timely adjusting and optimizing power distribution, and effectively preventing overload and energy waste.

[0011] In a possible implementation manner, determining the current loss corresponding to the line branch includes: Obtain branch information corresponding to the line branch, and obtain the ambient temperature corresponding to the line branch, the branch information including branch rated voltage, branch actual voltage, branch power loss, branch wire resistivity, branch wire length, branch wire cross-sectional area, total contact resistance and resistance temperature coefficient; Substitute the branch rated voltage and the branch actual voltage into the voltage function to obtain the voltage influence coefficient, where the voltage function is: , is the rated voltage of the branch, and U is the actual voltage of the branch; Determining a branch current corresponding to the line branch based on a load current corresponding to the line branch; Based on the voltage influence coefficient, the branch information and the ambient temperature, and based on formula 1, the current loss corresponding to the line branch is calculated, wherein the formula 1 is , P is the current loss, I is the branch current, ρ is the branch wire resistivity, l is the branch wire length, S is the branch wire cross-sectional area, R is the total contact resistance, K is the resistance temperature coefficient, T is the ambient temperature, is the temperature threshold, and cosψ is the power factor.

[0012] By adopting the above technical solution, the detailed parameters of the line branch (including branch rated voltage, actual voltage, power loss, wire resistivity, length, cross-sectional area, total contact resistance, etc.) and ambient temperature are analyzed, and the voltage influence coefficient is calculated using the voltage function to accurately reflect the impact of voltage fluctuations on current loss. The branch current is determined based on the load current, and the current loss of the line branch is accurately calculated by combining the voltage influence coefficient, branch information, ambient temperature and a complex formula that comprehensively considers the resistance temperature effect and power factor.

[0013] In a possible implementation manner, determining the operating current coefficient range corresponding to the line branch based on the operating current and the output current includes: Acquire historical data corresponding to the line branch, the historical data including historical normal data and historical fault data, the historical normal data including historical normal current coefficients corresponding to each historical moment when the line branch is not faulty, and the historical fault data including historical fault current coefficients corresponding to each historical moment when a line branch fault occurs; Calculate the standard deviation value corresponding to the historical data; Based on the historical data, determining a quantile value corresponding to the line branch; Determining a margin value corresponding to the line branch based on the quantile value and the standard deviation value; Calculating the ratio of the working current to the output current to obtain a standard working current coefficient corresponding to the line branch; Based on the standard operating current coefficient and the margin value, an operating current coefficient range corresponding to the line branch is determined.

[0014] By adopting the above technical solution, the historical normal data and historical fault data of the line branch are analyzed, and the standard deviation value of these historical data is calculated to evaluate the discreteness of the data. The quantile value is determined based on the historical data to characterize the distribution of the current coefficient. The margin value of the line branch is calculated using the quantile value and the standard deviation value, which reserves a safe space for the fluctuation of the current coefficient. Then, the ratio of the working current to the output current is calculated to obtain the standard working current coefficient. Combined with the standard working current coefficient and the margin value, the working current coefficient range of the line branch is determined, which effectively improves the accuracy of the current coefficient range determination.

[0015] In a possible implementation, determining whether there is a leakage fault in a line branch based on the operating current coefficient range and the current branch current includes: Comparing the current branch current corresponding to each line branch with the operating current coefficient range to determine whether each current branch current is not within the corresponding operating current coefficient range; If there is no current branch current part within the corresponding working current coefficient range, it is determined that there is no leakage fault in each line branch; If the current branch current is not within the corresponding operating current coefficient range, it is determined that the line branch that is not within the corresponding operating current coefficient range has a leakage fault.

[0016] By adopting the above technical solution, the current branch current of each line branch is compared with its corresponding working current coefficient range, and it can be determined whether the current state of each branch is normal. If the current current of all branches falls within its working current coefficient range, it means that all line branches are operating normally and there is no leakage fault. Once it is found that the current current of a branch exceeds its working current coefficient range, it can be immediately determined that there is a leakage fault in the branch, thereby improving the accuracy and efficiency of leakage detection and effectively avoiding energy waste and safety hazards caused by leakage.

[0017] In a possible implementation manner, after determining whether there is a leakage fault in the line branch, the method further includes: If it is determined that there is a leakage fault in the line branch, the line branch with the leakage fault is determined as the target line branch; Obtaining a load current of each load corresponding to the target line branch; The leakage area is determined based on the load current corresponding to each load and the load working state.

[0018] By adopting the above technical solution, the fault branch is located as the target line branch, and the load current of each load on the branch is obtained. By combining the current data of each load and its working status, the area where the leakage occurs can be further accurately determined. This not only helps to quickly locate the leakage point and reduce the troubleshooting time, but also provides detailed guidance for subsequent maintenance work to ensure the pertinence and effectiveness of the maintenance work.

[0019] In a second aspect, the present application provides a line leakage detection device, which adopts the following technical solution: A line leakage detection device, comprising: An acquisition module is used to acquire line information corresponding to the current circuit and to acquire the output current corresponding to the current circuit in real time, wherein the line information includes line branches, branch loads, and branch working states; A first determination module, configured to determine a working current coefficient range corresponding to each of the line branches based on the line information and the output current; A collection module, used for collecting the current branch current corresponding to the line branch in real time; The second determination module is used to determine whether there is a leakage fault in the line branch based on the working current coefficient range and the current branch current.

[0020] In a third aspect, the present application provides a leakage detector, which adopts the following technical solution: A leakage detector, comprising: at least one processor; Memory; At least one application, wherein the at least one application is stored in a memory and configured to be executed by at least one processor, and the at least one application is configured to: execute the line leakage detection method described in the first aspect above.

[0021] In a fourth aspect, the present application provides a computer-readable storage medium, which adopts the following technical solution: A computer-readable storage medium includes: a computer program that can be loaded by a processor and execute the line leakage detection method described in the first aspect.

[0022] In summary, this application includes the following beneficial technical effects: By obtaining the line information corresponding to the current circuit, including line branches, branch loads, and branch working status, the working current coefficient range corresponding to each line branch is determined based on the line information and the real-time output current, and the theoretical current range is combined with the actual line conditions to provide a scientific basis for leakage judgment. Next, the current branch current corresponding to the line branch is collected in real time to ensure the timeliness and accuracy of the data. Based on the working current coefficient range and the current branch current, it is determined whether there is a line branch leakage fault. The actual current is compared with the preset current range, and the leakage fault can be accurately identified. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the connection between a leakage detector and a current circuit provided in an embodiment of the present application; Figure 2 It is a flow chart of a line leakage detection method provided in an embodiment of the present application; Figure 3 is a block diagram of a line leakage detection device provided in an embodiment of the present application; Figure 4 It is a schematic diagram of a leakage detector provided in an embodiment of the present application. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1 -Attached Figure 4 This application is described in further detail.

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0026] Line safety is extremely important in electrical systems and is a prerequisite for ensuring the normal operation of power supply and electrical equipment. Nowadays, complex circuits are increasingly widely used. Although they have improved the convenience and efficiency of production and life, they also bring higher safety risks. In industrial production and household electricity environments, line leakage is a common safety hazard, which can easily cause serious accidents such as fire and electric shock. Therefore, effective detection and prevention of line leakage has become a technical problem that needs to be solved urgently. Existing technologies mostly rely on traditional leakage protectors (such as residual current circuit breakers) to monitor system leakage. They judge leakage based on the change of zero-sequence current in the main circuit and cut off power supply to achieve protection when the threshold is reached. However, traditional leakage protectors can only detect large-scale leakage of the entire line, and it is difficult to detect small-scale leakage signals in a single branch.

[0027] In view of this, an embodiment of the present application provides a line leakage detection method, which is performed by a leakage detector, which is a portable leakage detector using photovoltaic energy storage, see Figure 1 , the leakage detector is connected to the line to be monitored (that is, the current circuit, hereinafter referred to as the current circuit) to detect whether there is leakage in the current circuit. Specifically, the leakage detector is designed to solve the problem of line leakage troubleshooting and can monitor multiple lines or equipment in real time. Once the leakage value exceeds the threshold, it can automatically record key information and send an alarm to the operation and maintenance personnel's mobile phone. The line status can be checked through the mobile phone APP to help them quickly locate the leakage branch or user, greatly shortening the troubleshooting time. It is an electrician's right-hand man. It adopts the CortexM3 central processing unit and embedded software design, with strong anti-interference, excellent filtering, accurate and fast measurement, and can adapt to a variety of environments.

[0028] Functional features of leakage detector: 1. Clear display: LCD screen with wide temperature and wide viewing angle can monitor multiple leakage values ​​at the same time, which is intuitive and clear.

[0029] 2. Convenient installation: Alligator clip for power supply and headphone plug for sensor, convenient for on-site operation.

[0030] 3. Accurate measurement: advanced technology, accurate and fast measurement.

[0031] 4. Portable and lightweight: handheld housing, small size and light weight, easy to carry.

[0032] 5. Real-time monitoring: Circularly display the leakage values ​​of multiple lines to understand the situation in real time.

[0033] 6. Record query: You can check the branch over-threshold alarm records, including leakage value and time, to assist in fault analysis.

[0034] 7.Easy operation: simple button operation, quick access to leakage information.

[0035] 8. Multiple communications: supports 4G IoT card and 485 communication. Data can be uploaded to the background and mobile phone APP. The login account is "LD+last 6 digits of address code" and the password is "PW+last 6 digits of address code".

[0036] Wiring method of leakage detector: 1. Access to the leakage current transformer: plug the device into the headphone jack, follow the sequence, clamp the live and neutral wires of the line (for three-phase four-wire, clamp all three live wires and the neutral wire), connect the main transformer to line 1, and the branch can be connected to all lines. Connect the device end first and then clamp the line to ensure it is firm.

[0037] 2. Power supply connection: Connect the power cord plug to the AC220 "LN" port, and use the crocodile clips to clamp the live wire (red) and the neutral wire (black). It is strictly forbidden to connect the wrong voltage to avoid burning the equipment.

[0038] Operating Instructions of Leakage Detector: 1. Cancel the alarm: When the alarm sounds, press the “Cancel Alarm” button once to cancel the alarm and restore the normal display.

[0039] 2. Buzzer control: Long press the "extinguish" button to start or stop the buzzer.

[0040] 3. Alarm record query: Press the "Menu" and "Tab / Switch" keys in normal display, find "Alarm record query" and press the "Confirm" key, then press the "Tab / Switch" key to view the alarm records of each line.

[0041] 4. Parameter setting: Press the "Menu", "Tab / Switch" and "Confirm" keys to locate the parameter item, use the "Increase" and "Decrease" keys to adjust the value, the "Tab / Switch" key to switch digits or parameters, and finally press the "Confirm" key to confirm the change.

[0042] Main circuit over-limit threshold setting: default 50mA, range 20-1000mA, adjust according to the above steps.

[0043] Branch over-limit threshold setting: Same as main line setting method, the default is the same as the range.

[0044] Main and branch over-limit action time setting: default 40ms, range 30-1000ms, set in steps.

[0045] 5. Clear storage records: Press the "Menu" and "Tab / Switch" keys to find "Clear all alarm records", press the "Confirm" key to select "Yes" and confirm again to clear the alarm records.

[0046] Technical specifications of leakage detector: 1. Function and measurement mode: Monitor AC380V or AC220V leakage value, using open type leakage current sensor.

[0047] 2. Power supply and accuracy: AC220V±20%, 50-60Hz power supply, 0-500mA accuracy 3%±3mA.

[0048] 3. Wiring and display: Open-type transformer connected to cable (12-way), LCD display plus indicator light to indicate status, display frequency 1 time / 3 seconds.

[0049] 4. Indication and communication: There are power, alarm and network indicator lights, supporting 4G Internet of Things and 485 communication.

[0050] 5. Power and size weight: rated power <5W, weight 0.5Kg, size 120x100x50mm.

[0051] 6. Working and storage environment: working temperature -20℃-40℃, humidity below 90%Rh; storage temperature -20℃-60℃, humidity below 80%Rh.

[0052] Leakage detector display instructions: After power-on, the LCD displays the line leakage value in a loop. If the threshold is exceeded, an alarm is triggered, displaying the line number, leakage value and time, and the alarm indicator flashes (or the buzzer sounds).

[0053] The present application embodiment provides a line leakage detection method, such as Figure 2 As shown, the method provided in the embodiment of the present application is performed by a leakage detector, and the method includes steps S201 to S204, wherein: Step S201, obtaining line information corresponding to the current circuit, and obtaining the output current corresponding to the current circuit in real time.

[0054] The line information includes line branches, branch loads, and branch working status. Specifically, line branches refer to the current path branches from the power distribution point to each specific power load. For example, in a household circuit, the circuit branches of each room leading from the distribution box are line branches. Branch loads refer to the specific electrical equipment or devices connected to each line branch.

[0055] The branch working state describes the current operation of the branch load, which can be divided into two states: working and standby. The working state means that the load is operating normally and consuming power, while the standby state means that the load is not fully operating but is still connected to the circuit and may have a small amount of standby power consumption. For example, when the TV is turned off and in standby state, some circuits are still working to maintain the power supply of the standby function.

[0056] The leakage detector can obtain information through various sensors pre-connected in the circuit. Specifically, a current transformer is used to measure the output current of the line, and the current signal is converted into an electrical signal that can be recognized by the leakage detector, and then read by the leakage detector after analog-to-digital conversion (ADC). Furthermore, the connection status of the line branch and the type of connected load are directly obtained from the database corresponding to the current circuit. For the working status of the branch, it is possible to determine whether the load is in working or standby state by monitoring the load's operating signal (such as the motor's running signal, the switch status signal of the electrical equipment, etc.).

[0057] Step S202: Determine the operating current coefficient range corresponding to each line branch based on the line information and the output current.

[0058] Among them, the working current coefficient range refers to the possible value range of the working current coefficient of a line branch under normal working conditions. This range is determined based on the normal electrical characteristics of the load, circuit design parameters, and certain actual working conditions. It is used to determine whether the branch current is within a reasonable normal range, and thus determine whether there are abnormal conditions such as leakage.

[0059] Specifically, according to the obtained line branch and branch load information, the current parameters corresponding to each type of load under different working conditions are queried from the database corresponding to the current circuit. Further, for each line branch, the series-parallel relationship of the load on the line branch is obtained from the database corresponding to the current circuit, and the branch current corresponding to the line branch is calculated based on the series-parallel relationship, combined with the currently measured output current, the working current coefficient is calculated based on the formula = branch current / output current, and the working current coefficient corresponding to the line branch is obtained. Further, the deviation threshold of the working current of the line branch is obtained, and [working current coefficient-deviation threshold, working current coefficient+deviation threshold] is obtained to obtain the working current coefficient range corresponding to the line branch. It is worth noting that the working current coefficient range corresponding to each line branch is calculated based on the above method.

[0060] Specifically, the current calculation method in the series relationship: In a series circuit, the current is equal everywhere, so the branch current is equal to the current of any load on the branch; the current calculation method in the parallel relationship: the branch current is equal to the sum of the currents of all loads on the branch. Based on the series and parallel relationship of the loads on the line branch and the current parameters corresponding to each load, the branch current corresponding to the line branch can be calculated.

[0061] Step S203: collecting the current branch current corresponding to the line branch in real time.

[0062] High-precision current sensors (such as Hall effect current sensors) are installed on each line branch. These sensors can sense the size of the branch current in real time and convert it into a voltage signal or digital signal for transmission to the leakage detector. The leakage detector uses the built-in signal acquisition module to collect and quantify the signal output by the sensor at a certain sampling frequency (for example, 100 samples per second or higher, which can be set according to actual needs) to obtain the real-time value of the current branch current. In order to ensure the accuracy and stability of the collected data, the leakage detector can also filter the collected current data to remove noise interference and abnormal fluctuations, such as using a sliding average filter algorithm or a digital low-pass filter algorithm, so that the collected current data can more truly reflect the actual situation of the branch current.

[0063] Step S204: Determine whether there is a leakage fault in the line branch based on the operating current coefficient range and the current branch current.

[0064] The current branch current value collected in real time is compared with the previously determined working current coefficient range. Specifically, according to the output current and working current coefficient range of the current circuit, the theoretical current range value of the branch under normal conditions is calculated (that is, the output current multiplied by the upper and lower limits of the working current coefficient range). Then, it is determined whether the current of the current branch exceeds this theoretical range value. If the current branch current is greater than the upper limit of the theoretical range, there may be a leakage fault, because the current beyond the normal range may be due to the existence of an additional leakage path in the branch, resulting in an increase in current; if the current branch current is less than the lower limit of the theoretical range, there may also be abnormal conditions, such as some loads in the branch are not working properly (such as short circuits that cause the load to fail to operate normally, and the current is reduced instead) or there is leakage to other branches. When an abnormal current is detected, the leakage detector can further prompt the user that there is a leakage fault by issuing an alarm signal (such as an audible and visual alarm), and record relevant fault information (including branch number, abnormal current value, occurrence time, etc.) for subsequent troubleshooting and analysis. If the current branch current is not greater than the upper limit of the theoretical range and not less than the lower limit of the theoretical range, it means that there is no fault in the current circuit and no alarm signal is generated.

[0065] The embodiment of the present application provides a line leakage detection method, which obtains the line information corresponding to the current circuit, including the line branch, branch load and branch working status, determines the working current coefficient range corresponding to each line branch based on the line information and the output current obtained in real time, combines the theoretical current range with the actual line situation, and provides a scientific basis for leakage judgment. Then, the current branch current corresponding to the line branch is collected in real time to ensure the timeliness and accuracy of the data. Based on the working current coefficient range and the current branch current, it is judged whether there is a line branch leakage fault, and the actual current is compared with the preset current range, so that the leakage fault can be accurately identified.

[0066] In a possible implementation of the embodiment of the present application, in the above step S202, based on the line information and the output current, the working current coefficient range corresponding to each line branch is determined, and the process of determining the working current coefficient range corresponding to each line branch includes: Determine the load current corresponding to the line branch, and determine the current loss corresponding to the line branch; Determine the operating current corresponding to the line branch based on the current loss and the load current; Based on the operating current and the output current, the operating current coefficient range corresponding to the line branch is determined.

[0067] The load current is the theoretical current passed by each load in the line branch during normal operation.

[0068] Specifically, the current parameters corresponding to each type of load in different working states are obtained from the database corresponding to the current circuit, so as to obtain the load current corresponding to each load on the line branch. Furthermore, the resistivity, wire cross-sectional area and line length corresponding to the line branch of the current circuit are obtained from the database corresponding to the current circuit, and the current loss corresponding to the line branch is calculated based on current loss = resistivity * line length / wire cross-sectional area.

[0069] Furthermore, the series-parallel relationship of the loads on the line branch is obtained from the database corresponding to the current circuit, and the total load current corresponding to the line branch is calculated based on the series-parallel relationship, and the calculated current loss is added, and the sum is the working current corresponding to the line branch.

[0070] Furthermore, after obtaining the working current of the line branch, the deviation threshold of the working current of the line branch can be obtained by calculating the ratio of the working current to the output current, and the working current coefficient range corresponding to the line branch is obtained based on the ratio ± the deviation threshold, that is, the working current coefficient range corresponding to the line branch is [ratio - deviation threshold, ratio number + deviation threshold]. Among them, the deviation threshold can be determined according to the actual situation and accuracy requirements, and the embodiment of the present application is not limited to this.

[0071] A possible implementation of the embodiment of the present application, in the above embodiment, the branch working state includes the load working state of each load on the branch, the load working state is startup, working or standby, and determining the load current corresponding to the line branch includes: Based on the load working state corresponding to each load, the load power of each load corresponding to the line branch is obtained; Based on the working state of each load, determine the calculation formula corresponding to each load; Based on the load power of each load and the corresponding calculation formula, the load current corresponding to the line branch is determined.

[0072] The load working state refers to the operation of the load in the circuit, which is divided into three states: startup, working and standby. The startup state is the transition stage when the load starts to operate from rest, usually accompanied by large current and power changes; the working state is the stage when the load operates normally and continuously consumes electrical energy to complete its intended function; the standby state is the low-power stage when the load is connected to the power supply but has not fully entered the working state, and only maintains partial circuit operation to be ready to enter the working state at any time.

[0073] Specifically, the leakage detector communicates with the controller of each load or the smart meter (if the load is equipped with such equipment), and reads the working status information of each load through a specific communication protocol (such as Modbus, ZigBee, etc.), which will clearly identify whether the load is in the startup, working or standby state. Furthermore, for loads in the working state, the rated power value of this type of load in normal operation can be obtained from the database corresponding to the current circuit; for loads in the standby state, the corresponding standby power data is also obtained from the database corresponding to the current circuit; for loads in the startup state, due to the large startup current, the power will change in a short time. At this time, the startup characteristic curve of the load can be obtained from the database corresponding to the current circuit, and the current startup power can be obtained based on the startup characteristic curve of the load and the current startup time.

[0074] Further, for a load in a working state, the calculation formula corresponding to the load is determined to be the first formula, and based on the load power of the load in the working state and the corresponding first formula, the load current corresponding to the load is calculated; for a load in a standby state, the calculation formula corresponding to the load is determined to be the second formula, and based on the load power of the load in the standby state and the corresponding second formula, the load current corresponding to the load is calculated; for a load in a startup state, the calculation formula corresponding to the load is determined to be the third formula, and based on the load power of the load in the startup state and the corresponding third formula, the load current corresponding to the load is calculated.

[0075] Specifically, the first formula is ,in, is the load current, is the rated power of the load, is the rated voltage of the load, More specifically, for each load in working state, the rated power, rated voltage and power factor corresponding to the load are obtained from the database corresponding to the current circuit, and are substituted into the first formula to obtain the load current corresponding to the load. It is worth noting that the load current of a pure resistance load is =1.

[0076] The second formula is ,in, is the load current, is the standby power of the load, is the standby voltage of the load, More specifically, for each load in the standby state, the standby power, standby voltage and power factor corresponding to the load are obtained from the database corresponding to the current circuit, and are substituted into the second formula to obtain the load current corresponding to the load.

[0077] The third formula is ,in, is the load current, It is the transient current coefficient, usually ranging from 1.5 to 10. The specific value depends on the load type and characteristics. For example, it may be around 4 to 7 when the motor starts, and it is generally around 1.5 to 3 when other loads suddenly change. is the rated power of the load, is the rated voltage of the load, More specifically, for each load in the startup state, the rated power, rated voltage and power factor corresponding to the load are obtained from the database corresponding to the current circuit, and are substituted into the third formula to obtain the load current corresponding to the load.

[0078] A possible implementation manner of the embodiment of the present application, in the above embodiment, determining the current loss corresponding to the line branch includes: Obtain branch information corresponding to the line branch and the ambient temperature corresponding to the line branch. The branch information includes branch rated voltage, branch actual voltage, branch power loss, branch wire resistivity, branch wire length, branch wire cross-sectional area, total contact resistance and resistance temperature coefficient; Substitute the branch rated voltage and the branch actual voltage into the voltage function to obtain the voltage influence coefficient, where the voltage function is: , is the rated voltage of the branch, and U is the actual voltage of the branch; Determining a branch current corresponding to the line branch based on a load current corresponding to the line branch; Based on the voltage influence coefficient, branch information and ambient temperature, and based on formula 1, the current loss corresponding to the line branch is calculated, where formula 1 is , is the current loss, I is the branch current, ρ is the branch wire resistivity, l is the branch wire length, S is the branch wire cross-sectional area, R is the total contact resistance, K is the resistance temperature coefficient, T is the ambient temperature, is the temperature threshold, and cosψ is the power factor.

[0079] Among them, the branch conductor resistivity indicates the ability of the conductor material per unit length and unit cross-sectional area to hinder the current. It is an inherent characteristic of the conductor material and is related to the material of the conductor. It determines the size of the resistance generated when the current passes through a conductor of a certain length and cross-sectional area. The unit is ohm-meter (Ω・m). The branch conductor length refers to the actual length of the conductor that constitutes the branch of the line. The longer the conductor, the greater the resistance, and the greater the voltage drop and energy loss generated when the current passes through. It is one of the important factors affecting the line resistance and current loss. The unit is meter (m). The branch conductor cross-sectional area refers to the area of ​​the conductor cross section. The larger the cross-sectional area, the smaller the resistance of the conductor and the greater the current it can carry. It directly affects the resistance and current carrying capacity of the conductor. The unit is square meter (m²), usually expressed in square millimeter (mm²) in practical applications. The total contact resistance refers to the sum of the additional resistance generated at each connection point of the line branch (such as the connection between the conductor and the switch, socket, electrical equipment, etc.) due to loose contact, oxidation, etc. The temperature coefficient of resistance describes the characteristic of a material's resistance changing with temperature. It indicates the relative change in the material's resistance value when the temperature rises by 1°C.

[0080] Specifically, the branch rated voltage, branch actual voltage, branch power loss, branch wire resistivity, branch wire length, branch wire cross-sectional area, total contact resistance and resistance temperature coefficient corresponding to the line branch can be obtained from the database corresponding to the current circuit, and the temperature data can be obtained through a temperature sensor connected to the leakage detector that can monitor the ambient temperature in real time.

[0081] Furthermore, after obtaining the branch rated voltage and the branch actual voltage, the influence of voltage fluctuation on current loss can be determined based on the branch rated voltage and the branch actual voltage. Specifically, after obtaining the branch actual voltage, the branch rated voltage and the branch actual voltage can be substituted into the voltage function To obtain the voltage influence coefficient, is the rated voltage of the branch, and U is the actual voltage of the branch.

[0082] The series-parallel relationship of the loads on the line branch is obtained from the database corresponding to the current circuit, and the branch current corresponding to the line branch is calculated based on the series-parallel relationship. Specifically, if there are multiple loads in the branch in a series relationship, according to the characteristic that the current of the series circuit is equal everywhere, it is only necessary to obtain the load current corresponding to any load in the series part to determine the branch current of the series load. For the parallel load part in the branch, the leakage detector needs to obtain the load current corresponding to each parallel branch (that is, the branch where each parallel load is located) respectively, and sum up the load currents to obtain the branch current of the parallel load. Furthermore, if the entire branch is first composed of multiple series loads and then connected in series with multiple parallel loads (or vice versa, a structure that is first connected in parallel and then in series), then the branch current is equal to the sum of the current of the series part and the current of the parallel part; if there is a more complex series-parallel mixed structure in the branch, for example, there are multiple series and parallel combinations connected to each other, then according to the idea from the local to the whole, the small series or parallel part is first regarded as a whole, and its equivalent current is calculated, and then the calculation is gradually summarized to finally obtain the branch current of the entire branch.

[0083] Furthermore, after obtaining the voltage influence coefficient, branch information and ambient temperature, the voltage influence coefficient, branch information and ambient temperature can be substituted into formula 1: In order to obtain the current loss corresponding to the line branch, is the current loss, I is the branch current, ρ is the branch wire resistivity, l is the branch wire length, S is the branch wire cross-sectional area, R is the total contact resistance, K is the resistance temperature coefficient, T is the ambient temperature, is the temperature threshold, and cosψ is the power factor. The temperature threshold and the power factor can be set according to actual conditions, and are not limited in this embodiment of the present application.

[0084] A possible implementation of the embodiment of the present application, in the above embodiment, based on the working current and the output current, determining the working current coefficient range corresponding to the line branch includes: Obtain historical data corresponding to the line branch, the historical data including historical normal data and historical fault data, the historical normal data including historical normal current coefficients corresponding to each historical moment when the line branch is not faulty, and the historical fault data including historical fault current coefficients corresponding to each historical moment when the line branch is faulty; Calculate the standard deviation value corresponding to historical data; Based on historical data, determine the quantile value corresponding to the line branch; Based on the quantile value and the standard deviation value, determine the margin value corresponding to the line branch; Calculate the ratio of the working current to the output current to obtain the standard working current coefficient corresponding to the line branch; Based on the standard operating current coefficient and the margin value, determine the operating current coefficient range corresponding to the line branch.

[0085] The historical normal data is the record of the current coefficient corresponding to each historical moment when there is no fault in the line branch. The historical fault data is the current coefficient recorded at each historical moment when there is a fault in the line branch.

[0086] Specifically, the operation data of the line branch in the past period of time is obtained from the database corresponding to the current circuit, including the historical normal current coefficient corresponding to each historical moment when no fault occurs, and the historical fault current coefficient corresponding to each historical moment when a fault occurs. Further, the current coefficient values ​​in the obtained historical normal data and historical fault data are sorted out, and the standard deviation calculation formula in statistics is used to calculate the standard deviation value of these data.

[0087] Furthermore, the current coefficients in the historical data are sorted to form an ordered data set in ascending order. The corresponding quantile is determined according to the pre-set quantile rule. Common quantile rules include quartiles (dividing the data into four equal parts, corresponding to the first quartile Q1, the second quartile Q2, i.e. the median, and the third quartile Q3), percentiles (dividing the data into one hundred equal parts, such as the commonly used 95% quantile, indicating that 95% of the data is less than this value), etc. For example, taking the calculation of the 95% quantile as an example, if the data set has n data points, first calculate the index i=np (here p=95%). If i is an integer, the quantile is the average of the i-th and i+1-th data; if i is not an integer, the data corresponding to the integer obtained by rounding up is the quantile. Through this calculation method, the leakage detector determines the quantiles of the standard normal distribution corresponding to the line branch (such as Q1, Q2, Q3 or 95% quantile and other specific quantile values). These quantiles can characterize the distribution characteristics of historical current coefficient data from different angles and help further analyze the concentration of data at different locations.

[0088] Furthermore, after obtaining the percentile value and the standard deviation value, the product of the percentile value and the standard deviation value can be calculated to obtain the margin value. The margin value is a certain numerical range reserved to ensure the safe operation of the line branch. Considering various uncertain factors that may occur in actual operation, the margin value is set to avoid the current coefficient exceeding the normal range and causing faults or dangers.

[0089] The calculated standard working current coefficient is taken as the center, and a certain range is expanded up and down according to the determined margin value, so as to determine the working current coefficient range corresponding to the line branch. Specifically, the difference between the standard working current coefficient and the margin value is calculated to obtain the minimum value of the range, and the sum of the standard working current coefficient and the margin value is calculated to obtain the maximum value of the range, that is, the working current coefficient range corresponding to the line branch is [standard working current coefficient - margin value, standard working current coefficient + margin value].

[0090] A possible implementation of the embodiment of the present application is that in the above step S204, based on the working current coefficient range and the current branch current, determining whether there is a leakage fault in the line branch includes: Compare the current branch current corresponding to each line branch with the working current coefficient range to determine whether each current branch current is not within the corresponding working current coefficient range; If there is no current branch current part within the corresponding working current coefficient range, it is determined that there is no leakage fault in each line branch; If there is a current branch current that is not within the corresponding working current coefficient range, it is determined that the line branch that is not within the corresponding working current coefficient range has a leakage fault.

[0091] For each line branch, the currently acquired branch current value is compared with the working current coefficient range corresponding to the branch. Specifically, the theoretical normal range value of the branch current can be calculated based on the current output current of the entire line and the working current coefficient range corresponding to the branch (the calculation method is: the output current is multiplied by the lower limit of the working current coefficient range to obtain the lower current range value, and the output current is multiplied by the upper limit of the working current coefficient range to obtain the upper current range value). Then, it is determined whether the current branch current collected in real time is less than the lower current range value or greater than the upper current range value. If any of these two conditions is met, it is determined that the current branch current is not within the corresponding working current coefficient range; if the current branch current is between the upper and lower current range values ​​calculated, it is determined that it is within the corresponding working current coefficient range. Repeat the above comparison and judgment process for all line branches in turn.

[0092] Furthermore, after the current branch currents of all line branches are compared with their respective working current coefficient ranges, it is checked whether the current of any branch is not within the corresponding coefficient range. If the comparison results of all branches show that the current branch currents of each branch are within their corresponding working current coefficient ranges, then it is determined that there is no leakage fault in all line branches at the current moment.

[0093] If the current of a branch is found to be outside the corresponding coefficient range, the leakage detector will immediately mark the branch number or identifier and identify it as a suspected fault branch. For example, a fault branch list is set up through an internal program, and the branch numbers that do not meet the current coefficient range are added to facilitate subsequent targeted processing.

[0094] In a possible implementation manner of the embodiment of the present application, after determining whether there is a leakage fault in the line branch in the above step S204, the method further includes: If it is determined that there is a leakage fault in the line branch, the line branch with the leakage fault is determined as the target line branch; Obtaining the load current of each load corresponding to the target line branch; The leakage area is determined based on the load current corresponding to each load and the load working state.

[0095] After the leakage detector completes the current coefficient range comparison and other judgment operations of each line branch, if it is found that the current branch current of one (or some) branches is not within the corresponding working current coefficient range, it will be determined that these branches are suspected of leakage faults, and these line branches determined to have leakage faults will be marked as the target line branch information.

[0096] Furthermore, according to the determined target line branch information, all load devices connected to the target branch are identified from the stored circuit topology data. Then, for each load, the leakage detector relies on a high-precision current sensor (such as a Hall effect current sensor) installed on each load branch of the branch to obtain the load current.

[0097] In the process of obtaining the load current, the leakage detector also obtains the load working status corresponding to each load (startup, working or standby, the status information can be obtained through communication interaction with the load, or determined based on the load current size combined with the pre-stored normal working current range of the load and other information). For each load, according to its working status, the standard current range of different types of loads in each working state is obtained from the database corresponding to the current circuit to determine whether the currently obtained load current is within a reasonable range. For example, a motor in working state has a rated current of 5A during normal operation, and the reasonable working current range may be set to 4-6A. If the current load current is detected to be 8A, which is obviously beyond the normal range, then the area where the load is located may have leakage problems or other fault conditions.

[0098] Furthermore, after the above current rationality judgment is performed on all loads in the target line branch in turn, the area where the load with abnormal load current (outside the standard current range under the corresponding working state) is located is preliminarily determined as the leakage area. If there are multiple load current abnormalities, and these loads are relatively concentrated in physical position or in the same electrical connection part (such as loads connected to several sockets connected to the same cable, or several series loads after the outlet of the same distribution box, etc.), the scope of the leakage area can be further narrowed, and the specific line section, connection point or load device itself where there may be leakage risks can be more accurately located.

[0099] The above embodiment introduces a line leakage detection method from the perspective of method flow, and the following embodiment introduces a line leakage detection device from the perspective of a virtual module or a virtual unit. Please refer to the following embodiment for details.

[0100] See also Figure 3 The line leakage detection device 30 may specifically include: an acquisition module 301, a first determination module 302, a collection module 303 and a second determination module 304. Specifically: A line leakage detection device 30, comprising: The acquisition module 301 is used to acquire the line information corresponding to the current circuit and acquire the output current corresponding to the current circuit in real time. The line information includes line branches, branch loads and branch working states; A first determination module 302 is used to determine a working current coefficient range corresponding to each line branch based on line information and output current; The acquisition module 303 is used to acquire the current branch current corresponding to the line branch in real time; The second determination module 304 is used to determine whether there is a leakage fault in the line branch based on the working current coefficient range and the current branch current.

[0101] In a possible implementation of the embodiment of the present application, based on the line information and the output current, the operating current coefficient range corresponding to each line branch is determined. When the first determination module 302 determines the operating current coefficient range corresponding to each line branch, it can be specifically used to: Determine the load current corresponding to the line branch, and determine the current loss corresponding to the line branch; Determine the operating current corresponding to the line branch based on the current loss and the load current; Based on the operating current and the output current, the operating current coefficient range corresponding to the line branch is determined.

[0102] In a possible implementation of the embodiment of the present application, the branch working state includes the load working state of each load on the branch, and the load working state is startup, working or standby. When determining the load current corresponding to the line branch, the first determination module 302 can be specifically used to: Based on the load working state corresponding to each load, the load power of each load corresponding to the line branch is obtained; Based on the working state of each load, determine the calculation formula corresponding to each load; Based on the load power of each load and the corresponding calculation formula, the load current corresponding to the line branch is determined.

[0103] In a possible implementation of the embodiment of the present application, when determining the current loss corresponding to the line branch, the first determination module 302 may be specifically used to: Obtain branch information corresponding to the line branch and the ambient temperature corresponding to the line branch. The branch information includes branch rated voltage, branch actual voltage, branch power loss, branch wire resistivity, branch wire length, branch wire cross-sectional area, total contact resistance and resistance temperature coefficient; Substitute the branch rated voltage and the branch actual voltage into the voltage function to obtain the voltage influence coefficient, where the voltage function is: , is the rated voltage of the branch, and U is the actual voltage of the branch; Determining a branch current corresponding to the line branch based on a load current corresponding to the line branch; Based on the voltage influence coefficient, branch information and ambient temperature, and based on formula 1, the current loss corresponding to the line branch is calculated, where formula 1 is , is the current loss, I is the branch current, ρ is the branch wire resistivity, l is the branch wire length, S is the branch wire cross-sectional area, R is the total contact resistance, K is the resistance temperature coefficient, T is the ambient temperature, is the temperature threshold, and cosψ is the power factor.

[0104] In a possible implementation manner of the embodiment of the present application, when the first determination module 302 determines the operating current coefficient range corresponding to the line branch based on the operating current and the output current, it can be specifically used to: Obtain historical data corresponding to the line branch, the historical data including historical normal data and historical fault data, the historical normal data including historical normal current coefficients corresponding to each historical moment when the line branch is not faulty, and the historical fault data including historical fault current coefficients corresponding to each historical moment when the line branch is faulty; Calculate the standard deviation value corresponding to historical data; Based on historical data, determine the quantile value corresponding to the line branch; Based on the quantile value and the standard deviation value, determine the margin value corresponding to the line branch; Calculate the ratio of the working current to the output current to obtain the standard working current coefficient corresponding to the line branch; Based on the standard operating current coefficient and the margin value, determine the operating current coefficient range corresponding to the line branch.

[0105] In a possible implementation of the embodiment of the present application, when the second determination module 304 determines whether there is a leakage fault in the line branch based on the working current coefficient range and the current branch current, it can be specifically used to: Compare the current branch current corresponding to each line branch with the working current coefficient range to determine whether each current branch current is not within the corresponding working current coefficient range; If there is no current branch current part within the corresponding working current coefficient range, it is determined that there is no leakage fault in each line branch; If there is a current branch current that is not within the corresponding working current coefficient range, it is determined that the line branch that is not within the corresponding working current coefficient range has a leakage fault.

[0106] In a possible implementation of the embodiment of the present application, the line leakage detection device 30 further includes: A third determination module is used to determine the line branch with the leakage fault as the target line branch if it is determined that there is a leakage fault in the line branch; A current acquisition module, used to acquire the load current of each load corresponding to the target line branch; The fourth determination module is used to determine the leakage area based on the load current corresponding to each load and the load working state.

[0107] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0108] See also Figure 4 , the embodiment of the present application also introduces a leakage detector from the perspective of a physical device, such as Figure 4 As shown, Figure 4 The leakage detector 400 shown includes: a processor 401 and a memory 403. The processor 401 and the memory 403 are connected, such as through a bus 402. Optionally, the leakage detector 400 may also include a transceiver 404. It should be noted that in actual applications, the transceiver 404 is not limited to one, and the structure of the leakage detector 400 does not constitute a limitation on the embodiments of the present application.

[0109] Processor 401 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It may implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of this application. Processor 401 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0110] The bus 402 may include a path to transmit information between the above components. The bus 402 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus. The bus 402 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 4 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0111] The memory 403 may be a ROM (Read Only Memory) or other types of static storage devices that can store static information and instructions, a RAM (Random Access Memory) or other types of dynamic storage devices that can store information and instructions, or an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory) or other optical disk storage, optical disk storage (including compressed optical disk, laser disk, optical disk, digital versatile disk, Blu-ray disk, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0112] The memory 403 is used to store the application code for executing the solution of the present application, and the execution is controlled by the processor 401. The processor 401 is used to execute the application code stored in the memory 403 to implement the contents shown in the above method embodiment.

[0113] An embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer-readable storage medium is run on a computer, the computer can execute the corresponding content in the aforementioned method embodiment.

[0114] It should be understood that, although the steps in the flowchart of the accompanying drawings are displayed in sequence as indicated by the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least a part of the steps in the flowchart of the accompanying drawings may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn or alternately with other steps or at least a part of the sub-steps or stages of other steps.

[0115] The above are only some implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A line leakage detection method, characterized in that: include: Obtaining line information corresponding to the current circuit, and obtaining the output current corresponding to the current circuit in real time, wherein the line information includes line branches, branch loads, and branch working states; Based on the line information and the output current, determining a working current coefficient range corresponding to each of the line branches; Real-time acquisition of current branch current corresponding to line branches; Based on the operating current coefficient range and the current branch current, it is determined whether there is a leakage fault in the line branch.

2. The line leakage detection method according to claim 1, characterized in that: The determining of the operating current coefficient range corresponding to each of the line branches based on the line information and the output current, wherein the determining process of the operating current coefficient range corresponding to each of the line branches includes: Determining a load current corresponding to the line branch, and determining a current loss corresponding to the line branch; Based on the current loss and the load current, determining the operating current corresponding to the line branch; Based on the working current and the output current, a working current coefficient range corresponding to the line branch is determined.

3. The line leakage detection method according to claim 2, characterized in that: The branch working state includes the load working state of each load on the branch, and the load working state is startup, working or standby. The determining of the load current corresponding to the line branch includes: Based on the load working state corresponding to each load, obtaining the load power of each load corresponding to the line branch; Based on the working state of each load, determining a calculation formula corresponding to each load; Based on the load power of each load and the corresponding calculation formula, the load current corresponding to the line branch is determined.

4. The line leakage detection method according to claim 3, characterized in that: The determining the current loss corresponding to the line branch includes: Obtain branch information corresponding to the line branch, and obtain the ambient temperature corresponding to the line branch, the branch information including branch rated voltage, branch actual voltage, branch power loss, branch wire resistivity, branch wire length, branch wire cross-sectional area, total contact resistance and resistance temperature coefficient; Substitute the branch rated voltage and the branch actual voltage into the voltage function to obtain the voltage influence coefficient, where the voltage function is: , is the rated voltage of the branch, and U is the actual voltage of the branch; Determining a branch current corresponding to the line branch based on a load current corresponding to the line branch; Based on the voltage influence coefficient, the branch information and the ambient temperature, and based on formula 1, the current loss corresponding to the line branch is calculated, wherein the formula 1 is , P is the current loss, I is the branch current, ρ is the branch wire resistivity, l is the branch wire length, S is the branch wire cross-sectional area, R is the total contact resistance, K is the resistance temperature coefficient, T is the ambient temperature, is the temperature threshold, and cosψ is the power factor.

5. The line leakage detection method according to claim 2, characterized in that: The determining, based on the working current and the output current, a working current coefficient range corresponding to the line branch includes: Acquire historical data corresponding to the line branch, the historical data including historical normal data and historical fault data, the historical normal data including historical normal current coefficients corresponding to each historical moment when the line branch is not faulty, and the historical fault data including historical fault current coefficients corresponding to each historical moment when a line branch fault occurs; Calculate the standard deviation value corresponding to the historical data; Based on the historical data, determining a quantile value corresponding to the line branch; Determining a margin value corresponding to the line branch based on the quantile value and the standard deviation value; Calculating the ratio of the working current to the output current to obtain a standard working current coefficient corresponding to the line branch; Based on the standard operating current coefficient and the margin value, an operating current coefficient range corresponding to the line branch is determined.

6. The line leakage detection method according to any one of claims 1 to 5, characterized in that: The determining whether there is a leakage fault in a line branch based on the operating current coefficient range and the current branch current includes: Comparing the current branch current corresponding to each line branch with the operating current coefficient range to determine whether each current branch current is not within the corresponding operating current coefficient range; If there is no current branch current part within the corresponding working current coefficient range, it is determined that there is no leakage fault in each line branch; If the current branch current is not within the corresponding operating current coefficient range, it is determined that the line branch that is not within the corresponding operating current coefficient range has a leakage fault.

7. The line leakage detection method according to claim 1, characterized in that: After determining whether there is a leakage fault in the line branch, the method further includes: If it is determined that there is a leakage fault in the line branch, the line branch with the leakage fault is determined as the target line branch; Obtaining a load current of each load corresponding to the target line branch; The leakage area is determined based on the load current corresponding to each load and the load working state.

8. A line leakage detection device, characterized in that: include: An acquisition module is used to acquire line information corresponding to the current circuit and to acquire the output current corresponding to the current circuit in real time, wherein the line information includes line branches, branch loads, and branch working states; A first determination module, configured to determine a working current coefficient range corresponding to each of the line branches based on the line information and the output current; A collection module, used for collecting the current branch current corresponding to the line branch in real time; The second determination module is used to determine whether there is a leakage fault in the line branch based on the working current coefficient range and the current branch current.

9. A leakage detector, characterized in that: The leakage detector includes: at least one processor; Memory; At least one application, wherein the at least one application is stored in a memory and configured to be executed by at least one processor, and the at least one application is configured to: execute the line leakage detection method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed in a computer, the computer is caused to execute the line leakage detection method according to any one of claims 1 to 7.

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