Monitoring system and method of transformer area leakage protector, electronic equipment and storage medium

Abstract

The embodiment of the invention provides a monitoring system and method for a transformer area leakage protector, electronic equipment and a storage medium, and belongs to the field of power system safety. The system comprises a monitoring module used for monitoring the live-line condition of the zero line of the transformer in real time; the communication module is used for sending tripping information to a user terminal through a preset communication protocol when the leakage protector trips; the early warning module is used for sending out zero-sequence voltage overhigh early warning information when the zero-sequence voltage of the transformer is higher than a preset zero-sequence voltage threshold value; and the control center is used for controlling the monitoring module to monitor the electrification condition of the zero line of the transformer in real time, controlling the early warning module to send out zero-sequence voltage over-high early warning information when the zero-sequence voltage of the transformer is higher than a preset zero-sequence voltage threshold value, and sending the zero-sequence voltage over-high early warning information to the user terminal through the communication module for operation and maintenance management. Comprehensive monitoring and timely response to the live-line condition of the zero line of the transformer are realized, and the safety operation and maintenance management level of a power system is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power system safety, and in particular to a monitoring system, method, electronic equipment and storage medium for a leakage protector in an electric transformer substation. Background Art

[0002] In the power system, the leakage protector is an important device to ensure the safety of electricity use. As a key link in the safety line, its importance is self-evident. It can respond to leakage events within milliseconds and effectively curb potential electric shock risks by cutting off the power supply to protect the safety of personnel and equipment.

[0003] However, with the rapid development of smart grids, the limitations of traditional leakage protectors have gradually become apparent. In particular, after tripping, they often lack an effective information transmission mechanism, forming an information island phenomenon, that is, they lack the ability to communicate instantly with the monitoring system or remote operation and maintenance platform, making it impossible to quickly convey key information such as the location, type and time of the fault to the operation and maintenance team. This not only affects the efficiency of fault handling, but also prolongs the time for fault investigation and repair. It may also expand the scope of power outages due to failure to respond in time, affecting the user's power experience and the stability and reliability of the overall operation of the power grid. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a monitoring system, method, electronic device and storage medium for a leakage protector in a substation, which are used to completely or at least partially solve the technical problems existing in the above-mentioned prior art.

[0005] In order to achieve the above object, an embodiment of the present invention provides a monitoring system for a leakage protector in a transformer substation, comprising: Monitoring module, used to monitor the transformer neutral line energization status in real time; A communication module, connected to the monitoring module, for sending tripping information to a user terminal through a preset communication protocol when the leakage protector trips; An early warning module, connected to the communication module, for issuing an early warning message of excessive zero-sequence voltage when the zero-sequence voltage of the transformer is higher than a preset zero-sequence voltage threshold; The control center is connected to the monitoring module, the communication module and the early warning module, and is used to control the monitoring module to monitor the neutral line energization condition of the transformer in real time. When the zero-sequence voltage of the transformer is higher than the preset zero-sequence voltage threshold, the early warning module is controlled to issue a zero-sequence voltage over-high early warning message, and the zero-sequence voltage over-high early warning message is sent to the user terminal through the communication module, so that the user terminal can perform operation and maintenance management.

[0006] Optionally, the early warning module is provided with a zero-sequence voltage threshold determination logic. When the zero-sequence voltage monitored by the monitoring module exceeds a preset threshold, an early warning mechanism is triggered, and zero-sequence voltage excessively high early warning information is sent through the communication module.

[0007] Optionally, the early warning module is also provided with a graded early warning function, which sets different early warning levels according to different levels of the transformer zero-sequence voltage, and sends early warning information of different levels to the user terminal through the communication module, so that the user can take corresponding operation and maintenance management measures according to the early warning level.

[0008] Optionally, the monitoring module is also used to analyze and verify the real-time monitoring of the transformer neutral line live condition to ensure the authenticity of the leakage protector tripping: Filter the collected digital signals to remove noise and interference signals; The key characteristic parameters in the digital signal after filtering are extracted and compared with the preset trip signal template to verify whether the key characteristic parameters meet the characteristics of the trip signal. If so, the signal is determined to be a trip signal; if not, a sliding window method is used to perform statistical analysis on the signal in the window. If the signal fluctuation in the window exceeds a preset threshold, it is regarded as an abnormal fluctuation and corresponding processing is performed, wherein the preset trip signal template is constructed based on the waveform, amplitude range and frequency characteristics of the historical signal.

[0009] Optionally, a redundant signal path is introduced into the monitoring system, and the same tripping event is monitored and verified multiple times based on the signal consistency of the redundant signal path.

[0010] On the other hand, the present invention also provides a monitoring method for a leakage protector in a substation, comprising: Real-time monitoring of the transformer neutral line live condition. When the leakage protector trips, the trip information is sent to the user terminal through the preset communication protocol; When the transformer zero-sequence voltage is higher than the preset zero-sequence voltage threshold, a zero-sequence voltage high warning message is sent to the user terminal so that the user terminal can perform operation and maintenance management.

[0011] On the other hand, the present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above-mentioned method for monitoring the substation leakage protector when executing the program.

[0012] On the other hand, the present invention also provides a non-transitory computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the above-mentioned method for monitoring the substation leakage protection device are implemented.

[0013] Through the above technical solution, the monitoring module can monitor the live condition of the transformer zero line in real time and accurately, ensuring that the abnormal signal can be quickly captured when a leakage fault occurs, providing a reliable basis for timely taking protective measures. When the leakage protector trips or detects an abnormal zero-sequence voltage of the transformer, the communication module can immediately send the trip information or warning information to the user terminal through the preset communication protocol. It enables operation and maintenance personnel to quickly obtain fault information, greatly shortening the fault response time. The early warning module automatically issues a warning message when the transformer zero-sequence voltage is higher than the preset threshold, which not only helps operation and maintenance personnel to intervene in advance to deal with potential safety hazards, but also effectively avoids sudden power outages caused by leakage faults, and improves the stability and reliability of the power grid.

[0014] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings: Figure 1 It is a structural schematic diagram of a monitoring system for a leakage protection device in a transformer area provided by an embodiment of the present invention; Figure 2 It is an implementation flow chart of a monitoring method for a substation leakage protector provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0016] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0017] See also Figure 1 As shown, it is a structural schematic diagram of a monitoring system for a leakage protection device in a transformer substation provided by an embodiment of the present invention, including: The monitoring module 10 is used to monitor the neutral line energization status of the transformer in real time.

[0018] The communication module 11 is connected to the monitoring module and is used to send tripping information to the user terminal through a preset communication protocol when the leakage protector trips.

[0019] It should be understood that the reasons for the tripping of the leakage protector include but are not limited to short circuit, grounding and voltage loss.

[0020] The early warning module 12 is connected to the communication module and is used to issue an early warning message of excessive zero-sequence voltage when the transformer zero-sequence voltage is higher than a preset zero-sequence voltage threshold.

[0021] In some implementations, the zero-sequence voltage is calculated according to the following formula:

[0022] In the formula, Respectively represent the instantaneous values ​​of the three-phase voltages, Represents the calculated zero-sequence voltage.

[0023] The control center 13 is connected to the monitoring module, the communication module and the early warning module, and is used to control the monitoring module to monitor the neutral line energization condition of the transformer in real time. When the zero-sequence voltage of the transformer is higher than the preset zero-sequence voltage threshold, the early warning module is controlled to issue a zero-sequence voltage too high early warning message, and the zero-sequence voltage too high early warning message is sent to the user terminal through the communication module, so that the user terminal can perform operation and maintenance management.

[0024] In some embodiments, the early warning module 12 is provided with a zero-sequence voltage threshold determination logic. When the zero-sequence voltage monitored by the monitoring module exceeds a preset threshold, an early warning mechanism is triggered, and zero-sequence voltage excessively high early warning information is sent through the communication module.

[0025] It should be noted that the preset threshold can be set according to the specific application scenario and is not limited here.

[0026] In some embodiments, the early warning module 12 is also provided with a graded early warning function, which sets different early warning levels according to different levels of the transformer zero-sequence voltage, and sends early warning information of different levels to the user terminal through the communication module, so that the user can take corresponding operation and maintenance management measures according to the early warning level.

[0027] In some embodiments, in the power system, the zero-sequence voltage monitoring circuit is usually integrated into the relay protection device. These devices can detect and handle the ground fault in the power system in a timely manner by monitoring the changes in parameters such as zero-sequence voltage in real time. The early warning method of the zero-sequence voltage monitoring circuit is mainly based on the changes in the zero-sequence voltage to determine whether the power system has a ground fault. The following are some early warning methods: Mode 1: Threshold warning: In the zero-sequence voltage monitoring circuit, one or more zero-sequence voltage thresholds are usually preset, which are determined according to the normal operating parameters of the power system and the voltage change characteristics during a fault. The value of the zero-sequence voltage is monitored in real time and compared with the preset threshold. When the monitored zero-sequence voltage exceeds or falls below the preset threshold, the monitoring circuit will issue a warning signal, indicating that a ground fault may occur in the power system.

[0028] Method 2: Trend warning: By analyzing the continuous monitoring data of zero-sequence voltage, determine whether its change trend is abnormal. For example, if the zero-sequence voltage rises or falls sharply in a short period of time, it may indicate that a ground fault is occurring in the power system. Based on the results of the trend analysis, the monitoring circuit can issue a warning signal in advance so that power workers can take timely measures to troubleshoot and handle the fault.

[0029] Method 3: Comprehensive early warning: In practical applications, the zero-sequence voltage monitoring circuit is usually combined with other monitoring parameters (such as zero-sequence current, phase voltage, etc.) to form a comprehensive monitoring system. By comprehensively analyzing the changes in multiple monitoring parameters, it is possible to more accurately determine whether a ground fault occurs in the power system. When multiple monitoring parameters are abnormal at the same time, the monitoring circuit will collaboratively send out an early warning signal to improve the accuracy and reliability of the early warning.

[0030] Method 4: Automatic protection: After detecting a ground fault, the monitoring circuit can also cooperate with the automatic protection equipment to automatically cut off the faulty power supply to prevent the fault from expanding and protect the safe and stable operation of the power system.

[0031] In some embodiments, the monitoring module 10 is further used to analyze and verify the real-time monitoring of the transformer neutral line charged condition to ensure the authenticity of the leakage protector tripping: Filter the collected digital signals to remove noise and interference signals; The key characteristic parameters in the digital signal after filtering are extracted and compared with the preset trip signal template to verify whether the key characteristic parameters meet the characteristics of the trip signal. If so, the signal is determined to be a trip signal; if not, a sliding window method is used to perform statistical analysis on the signal in the window. If the signal fluctuation in the window exceeds a preset threshold, it is regarded as an abnormal fluctuation and corresponding processing is performed, wherein the preset trip signal template is constructed based on the waveform, amplitude range and frequency characteristics of the historical signal.

[0032] Specifically, before performing statistical analysis on the signals within the window using the sliding window method, a sliding window design is carried out: The window size (i.e., the number of data points included) should be set according to the characteristics of the signals and the detection requirements. A smaller window can provide higher time resolution and is suitable for rapidly changing signals; while a larger window can better smooth out noise but may sacrifice the ability to respond to rapid changes. The window size can be fixed or dynamically adjusted according to the signal characteristics. Window sliding step size: It determines the speed at which the window moves along the signal. The step size can be set to 1 (i.e., moving one data point each time) or an integer greater than 1 to achieve a faster sliding speed. The choice of the step size should balance the detection accuracy and the computational efficiency. Mean calculation: Within each window, calculate the mean of the signal to reflect the average level of the signal within the window. The mean can be used for subsequent comparisons and fluctuation detections. Standard deviation or variance calculation: Calculate the standard deviation or variance of the signal within the window to quantify the degree of signal fluctuation. The larger the standard deviation or variance, the more剧烈 the signal fluctuation. Fluctuation detection: Set a preset threshold (such as a multiple of the standard deviation) to determine whether the signal fluctuation is abnormal. Compare the standard deviation or variance of the current window with the preset threshold. If the standard deviation or variance exceeds the threshold, it is considered that there is abnormal fluctuation in the signal within the window.

[0033] In some embodiments, to better capture the subtle changes in the signal, overlap between windows can be set. For example, if the window size is N and the step size is M (M < N), then there will be partial overlap with the previous window each time the window moves. Window overlap can improve the detection sensitivity and accuracy. The preset threshold can be adaptively adjusted according to the historical data or real-time characteristics of the signal. For example, the threshold can be dynamically adjusted based on factors such as the average level of the signal and the historical fluctuation range to better adapt to the changes in the signal. When an abnormal fluctuation is detected, in addition to recording the relevant information, a corresponding abnormal handling mechanism can also be triggered. For example, the power supply of the relevant circuit can be immediately cut off to prevent the expansion of the leakage accident; or an alarm signal can be issued to notify the system administrator for further inspection and handling. Before performing statistical analysis, the signal can be smoothed to reduce the interference of noise. For a complex system that needs to monitor multiple signals simultaneously, a multi-window parallel processing method can be adopted. Each window independently processes a signal or a part of the signal to improve the overall processing speed and efficiency. Larger windows and complex statistical analysis algorithms may improve the detection accuracy but will also increase the computational burden and delay. Therefore, it is necessary to select an appropriate window size and statistical analysis method according to the requirements of the actual application scenario.

[0034] In some embodiments, redundant signal paths are introduced into the monitoring system, and the same tripping event is monitored and verified multiple times based on the signal consistency of the redundant signal paths.

[0035] Specifically, in the power system, in order to enhance the reliability and accuracy of the leakage protection monitoring system in the substation, a redundant signal path is introduced. Based on the signal consistency of the redundant signal path, the same tripping event is monitored and verified multiple times, which can significantly reduce the false alarms and missed alarms. The following are the specific details: Step 1: Determine redundant paths: In the power system, in addition to the main signal path, design additional signal paths as redundant paths. It should be understood that these paths should be physically independent to reduce the possibility of common mode failures. For example, redundant signal lines can be laid on different cables or optical fibers, or different communication devices (such as switches, routers) can be used to build a redundant communication network.

[0036] Step 2: Signal synchronization and alignment: Use a high-precision time synchronization device, the GPS clock, to calibrate the timestamps on different paths to ensure that the signals on the primary path and the redundant path are synchronized or aligned in time for subsequent consistency verification.

[0037] Step 3: Install monitoring equipment: Install monitoring equipment such as sensors, data acquisition units, etc. at appropriate locations on the primary path and redundant path to collect signals of tripping events.

[0038] Step 4: Signal preprocessing: Preprocess the collected signal, including filtering, denoising, amplification and other steps to improve the signal quality and signal-to-noise ratio.

[0039] Step 5: Signal consistency verification algorithm: A signal consistency verification algorithm is designed in advance to compare whether the signals collected on the main path and the redundant path are consistent. The algorithm can perform comparison based on the waveform, amplitude, phase and other characteristics of the signal.

[0040] Step 6: Threshold setting: Set a reasonable threshold to judge the consistency of the signal. If the difference between the signals on the two paths exceeds the threshold, it is considered that there is inconsistency and further investigation is needed.

[0041] Step 7: Alarm and response: When the signal inconsistency is detected, the monitoring system should immediately send out an alarm signal and notify the operation and maintenance personnel to check and deal with it. At the same time, the system can automatically take some emergency measures, such as switching to backup power supply, isolating the fault area, etc. to reduce the impact of the fault on the power grid.

[0042] In a specific embodiment, in the power system, the main signal path adopts the traditional cable transmission method, while the redundant path adopts the optical fiber transmission method. Current sensors and voltage sensors are installed on the main path and the redundant path respectively to collect the current and voltage signals of the tripping event. The signals on the two paths are transmitted to the data center through the optical fiber switch for processing and consistency verification. If it is found that there is a significant difference between the signals on the two paths (such as the current amplitude difference exceeds a certain percentage), the alarm mechanism is triggered and the operation and maintenance personnel are notified to check.

[0043] Through the above steps and examples, it can be seen that introducing redundant signal paths and performing multiple monitoring and verification based on signal consistency can significantly improve the reliability and accuracy of the leakage protection device monitoring system in the substation.

[0044] The technical effects achieved by this application are as follows: the monitoring module can monitor the live condition of the transformer zero line in real time and accurately, ensuring that the abnormal signal can be quickly captured when a leakage fault occurs, providing a reliable basis for taking protective measures in a timely manner. When the leakage protector trips or detects that the transformer zero-sequence voltage is abnormal, the communication module can immediately send the trip information or warning information to the user terminal through a preset communication protocol. This instant communication mechanism breaks the information island phenomenon of the traditional leakage protector, enabling the operation and maintenance personnel to quickly obtain fault information, greatly shortening the fault response time. The early warning module automatically issues early warning information when the transformer zero-sequence voltage is higher than the preset threshold, which not only helps the operation and maintenance personnel to intervene in advance to deal with potential safety hazards, but also effectively avoids sudden power outages caused by leakage faults, and improves the stability and reliability of the power grid. As the core of the entire monitoring system, the control center realizes centralized control and management of the monitoring module, communication module and early warning module through an integrated management interface and intelligent algorithms. It can not only control the monitoring module for real-time monitoring, but also automatically trigger the communication module to send information to the user terminal after receiving the early warning information, realizing the intelligent and automated operation and maintenance management. The entire monitoring system greatly improves the efficiency of operation and maintenance personnel in handling leakage faults through real-time monitoring, instant communication and early warning. Operation and maintenance personnel can quickly locate the fault point based on the information received, formulate effective repair plans, and quickly restore power supply, reducing power outage time and user losses.

[0045] See also Figure 2 As shown, it is a flowchart of an implementation method of a monitoring method of a leakage protection device in a substation provided by an embodiment of the present invention, which includes the following execution steps: Step 200: monitor the neutral line voltage status of the transformer in real time. When the leakage protector trips, the trip information is sent to the user terminal through a preset communication protocol.

[0046] Step 201: When the transformer zero-sequence voltage is higher than a preset zero-sequence voltage threshold, a zero-sequence voltage over-high warning message is sent to a user terminal so that the user terminal can perform operation and maintenance management.

[0047] On the other hand, the present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above-mentioned method for monitoring the substation leakage protector when executing the program.

[0048] On the other hand, the present invention also provides a non-transitory computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the above-mentioned method for monitoring the substation leakage protection device are implemented.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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 A step that specifies a function in one or more boxes.

[0053] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0054] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0055] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0056] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0057] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A monitoring system for leakage protection devices in a substation, characterized in that: include: Monitoring module, used to monitor the transformer neutral line energization status in real time; A communication module, connected to the monitoring module, for sending tripping information to a user terminal through a preset communication protocol when the leakage protector trips; An early warning module, connected to the communication module, for issuing an early warning message of excessive zero-sequence voltage when the zero-sequence voltage of the transformer is higher than a preset zero-sequence voltage threshold; The control center is connected to the monitoring module, the communication module and the early warning module, and is used to control the monitoring module to monitor the neutral line energization condition of the transformer in real time. When the zero-sequence voltage of the transformer is higher than the preset zero-sequence voltage threshold, the early warning module is controlled to issue a zero-sequence voltage over-high early warning message, and the zero-sequence voltage over-high early warning message is sent to the user terminal through the communication module, so that the user terminal can perform operation and maintenance management.

2. The monitoring system for leakage protection device in the substation according to claim 1 is characterized in that: The early warning module is provided with a zero-sequence voltage threshold determination logic. When the zero-sequence voltage monitored by the monitoring module exceeds a preset threshold, the early warning mechanism is triggered, and zero-sequence voltage excessively high early warning information is sent through the communication module.

3. The monitoring system for leakage protection device in the substation according to claim 1 is characterized in that: The warning module is also provided with a graded warning function, which sets different warning levels according to different levels of transformer zero-sequence voltage, and sends warning information of different levels to the user terminal through the communication module, so that the user can take corresponding operation and maintenance management measures according to the warning level.

4. The monitoring system for leakage protection device in substation area according to claim 1 is characterized in that: The monitoring module is also used to analyze and verify the real-time monitoring of the transformer neutral line energization status to ensure the authenticity of the leakage protector tripping: Filter the collected digital signals to remove noise and interference signals; The key characteristic parameters in the digital signal after filtering are extracted and compared with the preset trip signal template to verify whether the key characteristic parameters meet the characteristics of the trip signal. If so, the signal is determined to be a trip signal; if not, a sliding window method is used to perform statistical analysis on the signal in the window. If the signal fluctuation in the window exceeds a preset threshold, it is regarded as an abnormal fluctuation and corresponding processing is performed, wherein the preset trip signal template is constructed based on the waveform, amplitude range and frequency characteristics of the historical signal.

5. The monitoring system for leakage protection device in substation area according to claim 1 is characterized in that: A redundant signal path is introduced into the monitoring system, and the same tripping event is monitored and verified multiple times based on the signal consistency of the redundant signal path.

6. A monitoring method for leakage protection device in a substation, characterized in that: include: Real-time monitoring of the transformer neutral line live condition. When the leakage protector trips, the trip information is sent to the user terminal through the preset communication protocol; When the transformer zero-sequence voltage is higher than the preset zero-sequence voltage threshold, a zero-sequence voltage high warning message is sent to the user terminal so that the user terminal can perform operation and maintenance management.

7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps of the monitoring method of the substation leakage protection device as claimed in claim 6 are implemented.

8. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the processor, the steps of the monitoring method of the substation leakage protection device as claimed in claim 6 are implemented.

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