A method and device for detecting power outage in a power supply line

Abstract

The invention discloses a power outage detection method and device for a power supply line, belonging to the technical field of power outage detection for a power supply line. The method comprises obtaining N historical data and real-time voltage data of the voltage across a capacitor arranged inside a lightning arrester monitoring device on the power supply line; updating the historical data according to the real-time voltage data and the historical data at the last N-1 moments; calculating the average value of all the updated historical data; obtaining the latest real-time voltage data and updating the real-time voltage data; if the ratio of the real-time voltage data to the average value is less than or equal to a second preset value, the power supply line where the lightning arrester monitoring device is located is in a power outage state at the current moment; the invention adds a capacitor in the lightning arrester monitoring device and charges it with a leakage current, monitors the voltage across the capacitor, and determines whether there is a power outage according to the fluctuation of the voltage, thereby achieving accurate judgment, and the judgment is achieved according to the latest real-time voltage, thereby ensuring real-time performance.

Description

Technical Field

[0001] The invention relates to a method and a device for detecting power failure of a power supply line, belonging to the technical field of power failure detection of a power supply line. Background Art

[0002] In today's era, with the rapid development of smart grid construction, the automation, informationization and interactivity of power grids have been significantly improved, greatly enhancing the operating efficiency and stability of power systems. However, as the process of smart grids continues to accelerate, the issue of power safety has become increasingly prominent, becoming one of the key factors restricting the sustainable development of the power industry. The operating status of power supply lines is directly related to the quality of power supply and power safety. Therefore, real-time monitoring and efficient response to power outages and power shortages are particularly important.

[0003] At present, the industry has developed a variety of technical means for monitoring power outages and power shortages in power supply lines, including current transformers, three-phase balance methods, and phase calculation methods. These methods have their own advantages and disadvantages, but they all have limitations to varying degrees. For example, although current transformers can directly measure the magnitude of current, their ability to capture sudden power outages or intermittent power shortages is limited; the three-phase balance law relies on the balance of the three-phase current to determine the fault, but it is not effective under asymmetric faults or complex network structures; and the phase calculation law requires high-precision time synchronization and complex algorithm support, with high implementation costs and difficulty in ensuring real-time performance.

[0004] In summary, the prior art still has the following defects: low applicability to different application scenarios leads to low detection efficiency and low real-time performance. Summary of the invention

[0005] The purpose of the present invention is to provide a method and device for detecting power outages in power supply lines, so as to solve the problems of low detection efficiency and low real-time performance in the prior art.

[0006] To achieve the above objectives, the present invention is implemented by adopting the following technical solutions:

[0007] In a first aspect, the present invention provides a method for detecting power outage in a power supply line, comprising:

[0008] Acquire N historical data and real-time voltage data of the voltage across a capacitor disposed inside a lightning arrester monitoring device on a power supply line, wherein the capacitor is a charging object of a leakage current in the lightning arrester monitoring device;

[0009] Update N historical data according to the real-time voltage data and the historical data at the N-1th moment after;

[0010] Calculate the average value of all historical data after update;

[0011] Obtain the latest real-time voltage data and update the real-time voltage data;

[0012] If the ratio of the real-time voltage data to the average value is greater than the first preset value, then return to the step of obtaining the latest real-time voltage data and updating the real-time voltage data; if the ratio of the real-time voltage data to the average value is greater than the second preset value and is less than or equal to the first preset value, then return to the step of updating the historical data; if the ratio of the real-time voltage data to the average value is less than or equal to the second preset value, the power supply line where the lightning arrester monitoring device is located is currently in a power outage state.

[0013] Further, the updating of N historical data according to the real-time voltage data and the historical data at the next N-1 moments includes:

[0014] The historical data includes , Represents the historical data at the nth moment, n=1, 2, 3, ..., N, the historical data at the 1st moment is the historical data closest to the current moment, and the historical data at the Nth moment is the historical data farthest from the current moment;

[0015] Assign the value of the historical data closer to the current time to the historical data farther away from the current time, until only the value of the historical data closer to the current time is left. Not assigned a value;

[0016] Assign the value of real-time voltage data to the historical data at the first moment.

[0017] Furthermore, the first preset value is greater than 100%.

[0018] Furthermore, the second preset value is 0.

[0019] Furthermore, before the step of obtaining N historical data of the voltage across the capacitor inside the arrester monitoring device on the power supply line, the method further includes:

[0020] Obtain historical data of the voltage across the capacitor inside the arrester monitoring device on the power supply line at multiple consecutive moments. If the ratio of the voltage at a certain moment to the voltage at the previous moment is greater than a first preset value, the voltage at that moment is eliminated from the historical data. Finally, N historical data are retained and arranged in order from the historical data farthest from the current moment to the historical data closest to the current moment.

[0021] Furthermore, the capacitor is arranged in parallel with a rectifier bridge inside the arrester monitoring device.

[0022] In a second aspect, the present invention provides a power supply line power failure detection device, comprising a voltage acquisition unit, a data processing module and a storage module, wherein the data processing module is used to execute the method in the first aspect;

[0023] The voltage acquisition unit includes a rectifier bridge, a capacitor and an ADC. The rectifier bridge is provided with a first interface, a second interface, a third interface and a fourth interface. The second interface is connected to a power supply line and is used to receive a leakage current flowing into a lightning arrester monitoring device on the power supply line. The leakage current is alternating current. The rectifier bridge is used to convert the current flowing into it between alternating current and direct current. The first interface is used to output the alternating current output by the rectifier bridge to the power supply line. The fourth interface is used to output the direct current output by the rectifier bridge to the capacitor and the lightning arrester monitoring device on the power supply line. The third interface is used to receive the direct current returned by the capacitor.

[0024] The ADC is connected to both ends of the capacitor and is used to collect the voltage across the capacitor and transmit it to the data processing module;

[0025] The data processing module is connected to the storage module, and the data processing module transmits the received voltage data to the storage module, and obtains data from the storage module when executing the method in the first aspect, wherein the latest real-time voltage is collected by the ADC and transmitted to the data processing module.

[0026] Furthermore, it also includes a status sending module, which is connected to the data processing module. When the data processing module determines that the power supply line is in a power outage state, it sends an alarm instruction containing power outage information to the status sending module, and the status sending module sends the alarm instruction to a preset receiving unit.

[0027] Further, the voltage acquisition unit also includes a gas discharge tube, which is connected in parallel with the rectifier bridge and is arranged at a position before the leakage current flows into the rectifier bridge. When the leakage current exceeds a third preset value, the gas discharge tube is turned on, and the leakage current is directly released from the gas discharge tube to the outside of the lightning arrester monitoring device. When the leakage current does not exceed the third preset value, the gas discharge tube is not turned on, and a short circuit is formed here, and the leakage current flows into the lightning arrester monitoring device through the rectifier bridge;

[0028] The voltage acquisition unit further includes a first resistor, which is connected in series with the rectifier bridge. When the leakage current exceeds a fourth preset value, the first resistor limits the leakage current. The fourth preset value is definitely greater than the third preset value.

[0029] Furthermore, the voltage acquisition unit also includes a second resistor, and the second resistor and the third interface and the fourth interface form a loop. In the loop, the fourth interface also outputs the direct current output by the rectifier bridge to the second resistor, and then returns to the rectifier bridge through the third interface.

[0030] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0031] A power supply line power outage detection method and device provided by the present invention cleverly utilize the conventional configuration of lightning arresters in the power system, and by adding a capacitor in the lightning arrester monitoring device, the leakage current flowing into the lightning arrester monitoring device is allowed to charge the capacitor, and the voltage across the capacitor is monitored. According to the fluctuation of the voltage, it is judged whether the power supply line where the lightning arrester monitoring device is located is powered off, thereby achieving accurate judgment of the power outage status of the power supply line, and the judgment process is achieved based on the latest real-time voltage, so real-time performance can also be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a flow chart of a power supply line power outage detection method provided by an embodiment of the present invention;

[0033] Figure 2 is a schematic diagram of the voltage variation over time of a capacitor provided by an embodiment of the present invention;

[0034] Figure 3 is a schematic diagram of a power supply line power failure detection device provided by an embodiment of the present invention;

[0035] Figure 4 It is a schematic diagram of the circuit structure of the voltage acquisition unit provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the protection scope of the present invention.

[0037] Embodiment 1, the present invention provides a method for detecting power failure of a power supply line, comprising:

[0038] Acquire N historical data and real-time voltage data of the voltage across a capacitor disposed inside a lightning arrester monitoring device on a power supply line, wherein the capacitor is a charging object of a leakage current in the lightning arrester monitoring device;

[0039] Update N historical data according to the real-time voltage data and the historical data at the N-1th moment after;

[0040] Calculate the average value of all historical data after update;

[0041] Obtain the latest real-time voltage data and update the real-time voltage data;

[0042] If the ratio of the real-time voltage data to the average value is greater than the first preset value, then return to the step of obtaining the latest real-time voltage data and updating the real-time voltage data; if the ratio of the real-time voltage data to the average value is greater than the second preset value and is less than or equal to the first preset value, then return to the step of updating the historical data; if the ratio of the real-time voltage data to the average value is less than or equal to the second preset value, the power supply line where the lightning arrester monitoring device is located is currently in a power outage state.

[0043] The present invention cleverly utilizes the conventional configuration of lightning arresters in the power system. By adding a capacitor in the lightning arrester monitoring device, the leakage current flowing into the lightning arrester monitoring device is allowed to charge the capacitor, and the voltage across the capacitor is monitored. According to the fluctuation of the voltage, it is judged whether the power supply line where the lightning arrester monitoring device is located is powered off, thereby achieving accurate judgment of the power outage status of the power supply line. The judgment process is achieved based on the latest real-time voltage, so real-time performance can also be guaranteed.

[0044] Embodiment 2, as Figure 1 As shown, the present invention provides a power supply line power outage detection method, aiming to improve the safety and efficiency of power system operation and maintenance.

[0045] This method cleverly utilizes the conventional configuration of lightning arresters in power systems, monitors the changes in the leakage current of the lightning arrester in real time, and places a capacitor inside the lightning arrester monitoring device to charge it with the leakage current of the lightning arrester, and cleverly monitors the voltage across the capacitor. Under normal circumstances, the charging and discharging of the capacitor will reach a balanced state, and the voltage across the capacitor will basically stabilize at a fixed value. If the voltage across the capacitor increases sharply instantaneously, it means that there is an action in the power supply line. If the voltage across the capacitor continues to decrease until it is 0, it means that there is a power outage in the power supply line. The power outage state of the power supply line can be accurately judged by the value of the voltage across the charging capacitor.

[0046] In the power transmission and distribution network, lightning arresters are important protective devices, mainly used to limit the damage to power equipment caused by lightning overvoltage and operating overvoltage. Traditionally, confirming whether the power supply line is out of power mostly relies on manual inspection or the use of special power outage detection equipment. These methods are not only time-consuming and labor-intensive, but also have certain safety risks. The present invention cleverly utilizes the significant difference in the leakage current characteristics of the lightning arrester during normal operation and when the line is out of power, and realizes automatic and rapid identification of the power outage state.

[0047] During normal operation, the voltage of the power supply line is usually maintained at a fixed level. Since the power supply voltage is stable, the voltage borne by the lightning arrester is basically constant. This means that the leakage current of the lightning arrester will be close to a constant value under normal working conditions. This constant leakage current is determined by the design characteristics and material properties of the lightning arrester. In actual operation, although external factors such as ambient temperature and humidity may have some impact on the leakage current, these impacts are usually small and will not cause significant changes in the leakage current. Therefore, the fluctuation range of the leakage current usually does not exceed 10%. The internal resistance of the lightning arrester monitoring device is much smaller than the internal resistance of the lightning arrester, so the use of a series lightning arrester monitoring device has almost no effect on the size of the lightning arrester leakage current, which is equivalent to having a constant current source passing through the lightning arrester monitoring device. Such as Figure 4 As shown, inside the arrester monitoring device, the AC signal is changed into a DC signal through a rectifier bridge, so the current passing through the resistor is constant, and the voltage across the resistor will approach a constant value. A capacitor is connected in parallel at both ends of the resistor to charge it, making the voltage across the capacitor easier to measure. During the power-on process, part of the rectified DC current passes through the resistor to form a loop, and part of it is shunted out to charge the capacitor. The voltage across the capacitor gradually increases. As the voltage across the capacitor increases, the current shunted to charge the capacitor will decrease, and the current forming a loop through the resistor increases. The voltage across the resistor also increases until the voltage across the resistor is equal to the voltage across the capacitor, and all currents pass through the resistor to form a loop, thus reaching a balanced position. During the process of the voltage across the capacitor increasing, the voltage across the capacitor is sampled every second, and the growth rate is usually greater than 50%. Therefore, when the ratio of the real-time voltage to the last collected voltage is greater than 150%, these data are not stored in the historical data. During the operation, the leakage current increases many times instantaneously, and the capacitor will be charged to a very high voltage in an instant. After the operation is completed, since the voltage across the capacitor is much higher than the voltage across the resistor, the capacitor will discharge the resistor until the voltage across the resistor is equal to the voltage across the capacitor to reach a new balance. The operating voltage is often much larger than the normal voltage value. Here, the present invention does not include the ratio of the real-time voltage to the historical average voltage greater than 150% in the historical data. During the power outage, the leakage current through the arrester is 0, and the current through the rectifier bridge is also 0. The capacitor will discharge through the resistor, and the voltage across the capacitor continues to decrease until it is 0.

[0048] like Figure 2As shown, during the power-on process of the power supply line, the leakage current charges the capacitor, and the voltage across the capacitor gradually increases. At this time, the ratio of the real-time voltage to the last collected voltage is greater than 150%, and the voltage value at this time is not included in the historical data; during normal operation, the monitoring device identifies and judges the real-time data, and updates the historical data; when the ratio of the real-time voltage to the historical average voltage suddenly appears to be greater than 150% during normal operation, it is judged to be an action voltage, and the voltage value is not included in the historical voltage; during normal operation, if the voltage across the capacitor continues to decrease until it reaches 0, it is judged that a power outage has occurred in the power supply line.

[0049] In summary, the power supply line power outage detection method provided by the present invention can be summarized as follows: Figure 1 The process shown:

[0050] Step 1: Set parameters , used to store the latest N historical data of the voltage across the capacitor and the real-time voltage data of the voltage across the capacitor ;

[0051] Step 2: Update the latest N historical data of the voltage across the capacitor, that is, ,……, , ;

[0052] Step 3: Calculate the average value of the most recent N historical data of the voltage across the capacitor , ;

[0053] Step 4: Collect the voltage across the capacitor inside the arrester monitoring device in the power supply line (the latest data);

[0054] Step 5: Compare and ,make ,like a >150%, go to step 4; otherwise, go to step 6;

[0055] Step 6: Judgement a Is it 0? If yes, go to step 7; if not, go to step 2;

[0056] Step 7: Record the power outage of the power supply line, send the corresponding result to the preset receiving unit, and end the process.

[0057] in, Represents the historical data at the nth moment, n=1, 2, 3, ..., N. The historical data at the 1st moment is the historical data closest to the current moment, and the historical data at the Nth moment is the historical data farthest from the current moment.

[0058] Embodiment 3, as Figure 3 As shown, the present invention provides a power supply line power outage detection device, including a voltage acquisition unit, a data processing module, a storage module and a status sending module, the data processing module is used to execute the method provided in Example 1 / Example 2, wherein the voltage acquisition unit is connected to the data processing module through ADC sampling, the data processing module is connected to the storage module through an SPI bus, and the data processing module is connected to the status sending module through a serial port.

[0059] The voltage acquisition unit includes a rectifier bridge, a capacitor and an ADC. The rectifier bridge is provided with a first interface, a second interface, a third interface and a fourth interface. The second interface is connected to a power supply line and is used to receive a leakage current flowing into a lightning arrester monitoring device on the power supply line. The leakage current is alternating current. The rectifier bridge is used to convert the current flowing into it between alternating current and direct current. The first interface is used to output the alternating current output by the rectifier bridge to the power supply line. The fourth interface is used to output the direct current output by the rectifier bridge to the capacitor and the lightning arrester monitoring device on the power supply line. The third interface is used to receive the direct current returned by the capacitor.

[0060] The ADC is connected to both ends of the capacitor and is used to collect the voltage across the capacitor and transmit it to the data processing module;

[0061] The data processing module is connected to the storage module, and the data processing module transmits the received voltage data to the storage module, and obtains data from the storage module when executing the method provided in Example 1 / Example 2, wherein the latest real-time voltage is collected by ADC and transmitted to the data processing module.

[0062] The status sending module is connected to the data processing module. When the data processing module determines that the power supply line is in a power outage state, it sends an alarm instruction containing power outage information to the status sending module, and the status sending module sends the alarm instruction to a preset receiving unit.

[0063] The voltage collection unit also includes a gas discharge tube, which is connected in parallel with the rectifier bridge and is arranged at a position before the leakage current flows into the rectifier bridge. When the leakage current exceeds the third preset value, the gas discharge tube is turned on, and the leakage current is directly released from the gas discharge tube to the outside of the lightning arrester monitoring device. When the leakage current does not exceed the third preset value, the gas discharge tube is not turned on, and a short circuit is formed here, and the leakage current flows into the lightning arrester monitoring device through the rectifier bridge. In this embodiment, the third preset value is 4.86A;

[0064] The voltage acquisition unit also includes a first resistor, which is connected in series with the rectifier bridge. When the leakage current exceeds a fourth preset value, the first resistor limits the leakage current. In this embodiment, the fourth preset value is 150mA.

[0065] The voltage acquisition unit also includes a second resistor, which forms a loop with the third interface and the fourth interface. In the loop, the fourth interface also outputs the direct current output by the rectifier bridge to the second resistor, and then returns to the rectifier bridge through the third interface.

[0066] exist Figure 4 In the figure, Iin and Iout are the inlet and outlet of the leakage current in the arrester monitoring device, FI is the gas discharge tube, and the gas discharge tube (F1) is used as a protection circuit. When the leakage current through the arrester monitoring device is too large, the gas discharge tube is turned on, and the leakage current is directly released from the gas discharge tube to the outside of the arrester monitoring device, thereby protecting the back-end circuit. During normal operation, the gas discharge tube is not turned on, which is equivalent to forming a short circuit.

[0067] The first resistor ( Figure 4 R1 in the figure is connected in series with the rectifier bridge. When the leakage current is too large, the back-end circuit can be further protected by current limiting. The leakage current passes through the arrester monitoring device as alternating current. Here, the present invention uses a rectifier bridge ( Figure 4 BR1 in the figure changes the AC signal into a DC signal, making the subsequent measurement easier; the DC signal coming out of the rectifier bridge is directly connected to the second resistor ( Figure 4 R2) and capacitor ( Figure 4 The DC signal forms a loop through the resistor and can also charge the capacitor. The voltage Vr across the capacitor can be measured by ADC sampling, and further methods (methods provided in Example 1 / Example 2) can be used to automatically and quickly identify the power outage state of the power supply line.

[0068] Figure 4 In the figure, the symbols under FI and BR1 are their specific models respectively. 11 and 12 at both ends of FI represent the two interfaces of FI. 21, 22, 23, and 24 marked on BR1 correspond to the first interface, second interface, third interface, and fourth interface of the rectifier bridge respectively.

[0069] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0070] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0071] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0072] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0073] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for detecting power outage in a power supply line, characterized in that: include: Obtain historical data of voltages at both ends of a capacitor inside a lightning arrester monitoring device on a power supply line at multiple consecutive moments. If the ratio of the voltage at a certain moment to the voltage at a previous moment is greater than a first preset value, the voltage at that moment is removed from the historical data. Finally, N historical data are retained and arranged in order from the historical data farthest from the current moment to the historical data closest to the current moment. Acquire N historical data and real-time voltage data of the voltage across a capacitor disposed inside a lightning arrester monitoring device on a power supply line, wherein the capacitor is a charging object of a leakage current in the lightning arrester monitoring device; Update N historical data according to the real-time voltage data and the historical data at the N-1th moment after; Calculate the average value of all historical data after update; Obtain the latest real-time voltage data and update the real-time voltage data; If the ratio of the real-time voltage data to the average value is greater than the first preset value, then return to the step of obtaining the latest real-time voltage data and updating the real-time voltage data; if the ratio of the real-time voltage data to the average value is greater than the second preset value and is less than or equal to the first preset value, then return to the step of updating the historical data; if the ratio of the real-time voltage data to the average value is less than or equal to the second preset value, the power supply line where the lightning arrester monitoring device is located is currently in a power outage state.

2. The power supply line power outage detection method according to claim 1, characterized in that: The updating of N historical data according to the real-time voltage data and the historical data at the N-1th moment after the real-time voltage data includes: The historical data includes , Represents the historical data at the nth moment, n=1, 2, 3, ..., N, the historical data at the 1st moment is the historical data closest to the current moment, and the historical data at the Nth moment is the historical data farthest from the current moment; Assign the value of the historical data closer to the current time to the historical data farther away from the current time, until only the value of the historical data closer to the current time is left. Not assigned a value; Assign the value of real-time voltage data to the historical data at the first moment.

3. The method for detecting power outage in a power supply line according to claim 1, characterized in that: The first preset value is greater than 100%.

4. The power supply line power outage detection method according to claim 1, characterized in that: The second preset value is 0.

5. The method for detecting power outage in a power supply line according to claim 1, characterized in that: The capacitor is arranged in parallel with the rectifier bridge inside the arrester monitoring device.

6. A power outage detection device for a power supply line, characterized in that: It comprises a voltage acquisition unit, a data processing module and a storage module, wherein the data processing module is used to execute the method according to any one of claims 1 to 5; The voltage acquisition unit includes a rectifier bridge, a capacitor and an ADC. The rectifier bridge is provided with a first interface, a second interface, a third interface and a fourth interface. The second interface is connected to a power supply line and is used to receive a leakage current flowing into a lightning arrester monitoring device on the power supply line. The leakage current is alternating current. The rectifier bridge is used to convert the current flowing into it between alternating current and direct current. The first interface is used to output the alternating current output by the rectifier bridge to the power supply line. The fourth interface is used to output the direct current output by the rectifier bridge to the capacitor and the lightning arrester monitoring device on the power supply line. The third interface is used to receive the direct current returned by the capacitor. The ADC is connected to both ends of the capacitor and is used to collect the voltage across the capacitor and transmit it to the data processing module; The data processing module is connected to the storage module, and the data processing module transmits the received voltage data to the storage module, and obtains data from the storage module when executing the method described in any one of claims 1 to 5, wherein the latest real-time voltage is collected by the ADC and transmitted to the data processing module.

7. The power supply line power failure detection device according to claim 6, characterized in that: It also includes a status sending module, which is connected to the data processing module. When the data processing module determines that the power supply line is in a power outage state, it sends an alarm instruction containing power outage information to the status sending module, and the status sending module sends the alarm instruction to a preset receiving unit.

8. The power supply line power failure detection device according to claim 6, characterized in that: The voltage acquisition unit also includes a gas discharge tube, which is connected in parallel with the rectifier bridge and is arranged at a position before the leakage current flows into the rectifier bridge. When the leakage current exceeds a third preset value, the gas discharge tube is turned on, and the leakage current is directly released from the gas discharge tube to the outside of the arrester monitoring device. When the leakage current does not exceed the third preset value, the gas discharge tube is not turned on, and a short circuit is formed here, and the leakage current flows into the arrester monitoring device through the rectifier bridge; The voltage acquisition unit further includes a first resistor, which is connected in series with the rectifier bridge. When the leakage current exceeds a fourth preset value, the first resistor limits the leakage current. The fourth preset value is definitely greater than the third preset value.

9. The power supply line power failure detection device according to claim 6, characterized in that: The voltage acquisition unit also includes a second resistor, which forms a loop with the third interface and the fourth interface. In the loop, the fourth interface also outputs the direct current output by the rectifier bridge to the second resistor, and then returns to the rectifier bridge through the third interface.

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