Lightning arrester operation monitoring method, electronic equipment, storage medium and program product

Abstract

The invention provides a lightning arrester operation monitoring method, electronic equipment, a storage medium and a program product, and relates to the technical field of electric power safety. The method comprises the following steps: acquiring a three-phase leakage current value recorded by a leakage current monitoring device in the lightning arrester and a first lightning impulse frequency recorded by an action frequency monitoring device in the lightning arrester within a preset duration; determining whether the leakage current monitoring device is normal or not according to the three-phase leakage current value, and determining whether the action frequency monitoring device is normal or not according to the first lightning impulse frequency; and if the leakage current monitoring device is normal, performing deviation analysis on the three-phase leakage current value to obtain the insulation state of the lightning arrester. According to the invention, the lightning arrester operation monitoring efficiency and accuracy are improved.

Description

Technical Field

[0001] The present application relates to the technical field of power safety, and particularly to a method for monitoring the operation of a lightning arrester, an electronic device, a storage medium, and a program product. Background Art

[0002] A lightning arrester is an indispensable overvoltage protection device in the power system, and its performance directly affects the safe and stable operation of the power system. With the continuous expansion of the scale of the power system and the increasing improvement of the degree of intelligence, higher requirements are put forward for the monitoring of the operating state of the lightning arrester.

[0003] Currently, the existing monitoring of the operating state of a lightning arrester mainly relies on manual regular inspections and data transcription. That is, the operation and maintenance personnel manually transcribe key operating parameters such as the leakage current and the number of operations of the lightning arrester on site at a predetermined time interval, and then manually compare and analyze these data with historical data to determine whether there is an abnormality in the lightning arrester. However, this method relies on manual operation, and inevitably has problems of low efficiency and insufficient accuracy. Summary of the Invention

[0004] The present application provides a method for monitoring the operation of a lightning arrester, an electronic device, a storage medium, and a program product, so as to improve the efficiency and accuracy of monitoring the operation of the lightning arrester.

[0005] In a first aspect, the present application provides a method for monitoring the operation of a lightning arrester, including:

[0006] Obtaining the three-phase leakage current values recorded by the leakage current monitoring device in the lightning arrester, and the first number of lightning strikes within a preset duration recorded by the number-of-operations monitoring device in the lightning arrester;

[0007] Determining whether the leakage current monitoring device is normal according to the three-phase leakage current values, and determining whether the number-of-operations monitoring device is normal according to the first number of lightning strikes;

[0008] If the leakage current monitoring device is normal, performing deviation analysis on the three-phase leakage current values to obtain the insulation state of the lightning arrester.

[0009] In a possible implementation manner, performing deviation analysis on the three-phase leakage current values to obtain the insulation state of the lightning arrester includes:

[0010] Determining the difference in leakage current for each phase according to the three-phase leakage current values and the three-phase leakage current reference values;

[0011] If any one of the differences in leakage current for each phase exceeds the difference threshold, determining that the insulation state of the lightning arrester is insulation abnormality;

[0012] If the difference in leakage current of each phase does not exceed the difference threshold, determine the first deviation of the three-phase leakage current values based on the leakage current values of each phase.

[0013] Determine the insulation state of the arrester based on the first deviation.

[0014] In a possible implementation, determining the first deviation of the three-phase leakage current values based on the leakage current values of each phase includes:

[0015] Determine the absolute value of the current difference between any two phases based on the leakage current values of each phase.

[0016] Determine the minimum leakage current value from the leakage current values of each phase.

[0017] Determine the maximum absolute value of the current difference from multiple absolute values of the current difference.

[0018] Divide the maximum absolute value of the current difference by the minimum leakage current value to obtain the first deviation.

[0019] In a possible implementation, determining the insulation state of the arrester based on the first deviation includes:

[0020] If the first deviation is greater than or equal to the first deviation threshold, determine that the insulation state of the arrester is insulation abnormality.

[0021] If the first deviation is less than the first deviation threshold, determine the second deviation of the leakage current value of each phase in the three-phase leakage current values based on the initial three-phase leakage current values.

[0022] Determine the insulation state of the arrester based on the second deviation.

[0023] In a possible implementation, determining the second deviation of the leakage current value of each phase in the three-phase leakage current values based on the initial three-phase leakage current values includes:

[0024] For the leakage current value of the target phase in the three-phase leakage current values, determine the difference between the leakage current value of the target phase and the initial leakage current value of the target phase.

[0025] Divide the difference of the initial leakage current value of the target phase by the initial leakage current value of the target phase to obtain the second deviation of the leakage current of the target phase.

[0026] In a possible implementation, determining the insulation state of the arrester based on the second deviation includes:

[0027] If the second deviation is greater than or equal to the second deviation threshold, determine that the insulation state of the arrester is insulation abnormality.

[0028] If the first deviation is less than the first deviation threshold, determine that the insulation state of the arrester is normal insulation.

[0029] In a possible implementation manner, determining whether the leakage current monitoring device is normal according to the three-phase leakage current values includes:

[0030] If any one of the three-phase leakage current values is zero, it is determined that the leakage current monitoring device is abnormal;

[0031] If none of the three-phase leakage current values is zero, it is determined that the leakage current monitoring device is normal.

[0032] In a possible implementation manner, it further includes:

[0033] If any one of the leakage current monitoring device, the operation times monitoring device, and the insulation state is abnormal, an alarm message corresponding to the abnormality is output, where the alarm message includes at least one of the following: sound alarm, light alarm, and short message alarm.

[0034] In a possible implementation manner, determining whether the operation times monitoring device is normal according to the first lightning strike times includes:

[0035] Obtain the second lightning strike times within a preset duration monitored by the traveling wave monitoring device;

[0036] If the first lightning strike times are consistent with the second lightning strike times, it is determined that the operation times monitoring device is normal;

[0037] If the first lightning strike times are inconsistent with the second lightning strike times, it is determined that the operation times monitoring device is abnormal.

[0038] In a second aspect, the present application provides a lightning arrester operation monitoring device, including:

[0039] An acquisition module, configured to acquire the three-phase leakage current values recorded by the leakage current monitoring device in the lightning arrester, and the first lightning strike times within a preset duration recorded by the operation times monitoring device in the lightning arrester;

[0040] A determination module, configured to determine whether the leakage current monitoring device is normal according to the three-phase leakage current values, and determine whether the operation times monitoring device is normal according to the first lightning strike times;

[0041] An analysis module, configured to perform deviation analysis on the three-phase leakage current values to obtain the insulation state of the lightning arrester if the leakage current monitoring device is normal.

[0042] In a possible implementation manner, the analysis module is specifically configured to:

[0043] Determine the leakage current difference of each phase according to the three-phase leakage current values and the three-phase leakage current reference values;

[0044] If there is any leakage current difference among the leakage current differences of each phase that exceeds the difference threshold, determine that the insulation state of the arrester is abnormal insulation;

[0045] If the leakage current differences of each phase do not exceed the difference threshold, determine the first deviation of the three-phase leakage current values according to the leakage current values of each phase;

[0046] Determine the insulation state of the arrester according to the first deviation.

[0047] In a possible implementation manner, the determining module is specifically configured to:

[0048] Determine the absolute value of the current difference between any two phases according to the leakage current values of each phase;

[0049] Determine the minimum leakage current value from the leakage current values of each phase;

[0050] Determine the maximum absolute value of the current difference from multiple absolute values of the current difference;

[0051] Divide the maximum absolute value of the current difference by the minimum leakage current value to obtain the first deviation.

[0052] In a possible implementation manner, the determining module is specifically configured to:

[0053] If the first deviation is greater than or equal to the first deviation threshold, determine that the insulation state of the arrester is abnormal insulation;

[0054] If the first deviation is less than the first deviation threshold, determine the second deviation of the leakage current value of each phase in the three-phase leakage current value according to the initial three-phase leakage current value;

[0055] Determine the insulation state of the arrester according to the second deviation.

[0056] In a possible implementation manner, the determining module is specifically configured to:

[0057] For the leakage current value of the target phase in the three-phase leakage current value, determine the difference between the leakage current value of the target phase and the initial leakage current value of the target phase;

[0058] Divide the difference of the initial leakage current value of the target phase by the initial leakage current value of the target phase to obtain the second deviation of the leakage current of the target phase.

[0059] In a possible implementation manner, the determining module is specifically configured to:

[0060] If the second deviation is greater than or equal to the second deviation threshold, determine that the insulation state of the arrester is abnormal insulation;

[0061] If the first deviation is less than the first deviation threshold, determine that the insulation state of the arrester is normal insulation.

[0062] In a possible implementation, the determination module is specifically configured to:

[0063] If any one of the three-phase leakage current values is zero, it is determined that the leakage current monitoring device is abnormal;

[0064] If none of the three-phase leakage current values is zero, it is determined that the leakage current monitoring device is normal.

[0065] In a possible implementation, the lightning arrester operation monitoring device further includes a processing module, and the processing module is specifically configured to:

[0066] If any one of the leakage current monitoring device, the operation times monitoring device, and the insulation state is abnormal, an alarm message corresponding to the abnormality is output, where the alarm message includes at least one of the following: sound alarm, light alarm, and short message alarm.

[0067] In a possible implementation, the determination module is further configured to:

[0068] Obtain the second number of lightning strikes within a preset duration monitored by the traveling wave monitoring device;

[0069] If the first number of lightning strikes is consistent with the second number of lightning strikes, it is determined that the operation times monitoring device is normal;

[0070] If the first number of lightning strikes is inconsistent with the second number of lightning strikes, it is determined that the operation times monitoring device is abnormal.

[0071] In a third aspect, the present application provides an electronic device, including: a memory, a processor;

[0072] The memory stores computer-executable instructions;

[0073] The processor executes the computer-executable instructions stored in the memory, so that the processor executes the above first aspect and / or various possible implementations of the first aspect.

[0074] In a fourth aspect, the present application provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed by a processor, they are used to implement the above first aspect and / or various possible implementations of the first aspect.

[0075] In a fifth aspect, the present application provides a computer program product, including a computer program, and when the computer program is executed by a processor, it implements the above first aspect and / or various possible implementations of the first aspect.

[0076] The lightning arrester operation monitoring method, electronic device, storage medium, and program product provided by this application relate to the field of power safety technologies. The method includes: obtaining the three-phase leakage current values recorded by the leakage current monitoring device in the lightning arrester, and the first lightning strike count within a preset duration recorded by the operation count monitoring device in the lightning arrester; determining whether the leakage current monitoring device is normal based on the three-phase leakage current values, and determining whether the operation count monitoring device is normal based on the first lightning strike count; if the leakage current monitoring device is normal, performing deviation analysis on the three-phase leakage current values to obtain the insulation state of the lightning arrester. By using the leakage current monitoring device to obtain the three-phase leakage current in real time, this application avoids the cumbersome processes of traditional manual inspections and data transcription, greatly improving the efficiency of data acquisition; by performing preliminary analysis on the three-phase leakage current values to determine whether the leakage current monitoring device is normal, it can promptly detect faults in the leakage current monitoring device, avoiding subsequent ineffective data analysis and further enhancing the monitoring efficiency; when the leakage current monitoring device is normal, performing deviation analysis on the three-phase leakage current values to obtain the insulation state of the lightning arrester can effectively identify the insulation state of the lightning arrester; in addition, this application also considers the reliability of the lightning strike count on the operation monitoring device of the lightning arrester, performing multi-dimensional analysis on the lightning arrester, thereby improving the accuracy of lightning arrester monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0077] The accompanying drawings herein are incorporated into and constitute a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application.

[0078] Figure 1 is a schematic flowchart of the lightning arrester operation monitoring method provided by this application Figure 1 ;

[0079] Figure 2 is a schematic flowchart of the lightning arrester operation monitoring method provided by an embodiment of this application Figure 2 ;

[0080] Figure 3 is a schematic structural diagram of the lightning arrester operation monitoring device provided by this application;

[0081] Figure 4 is a schematic structural diagram of the electronic device provided by an embodiment of this application.

[0082] Through the above accompanying drawings, the clear embodiments of this application have been shown, and there will be more detailed descriptions hereinafter. These drawings and text descriptions are not intended to limit the scope of the concept of this application in any way, but to explain the concept of this application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0083] Exemplary embodiments will be described in detail herein, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0084] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in the present application are all information and data authorized by the user or fully authorized by all parties. Moreover, the processing of relevant data, such as collection, use, processing, transmission, provision, disclosure, and application, complies with relevant laws, regulations, and standards, adopts necessary confidentiality measures, does not violate public order and good customs, and provides corresponding operation entrances for users to choose to authorize or refuse.

[0085] First, the terms involved in the present application are explained:

[0086] As a basic configuration for overvoltage protection of power transmission and transformation equipment, a gapless metal oxide arrester is a device composed of non-linear metal oxide resistor chips connected in series and / or parallel without parallel or series discharge gaps. By being connected in parallel with the protected equipment, when an overvoltage appears at the end, a large current will flow through it to absorb the overvoltage energy and limit the overvoltage below the insulation withstand strength of the protected equipment.

[0087] To address the above problems, the present application proposes a method for monitoring the operation of an arrester. By using a leakage current monitoring device to obtain the three-phase leakage current in real time, the cumbersome processes of traditional manual inspections and data transcription are avoided. The three-phase leakage current values are initially analyzed, and when the leakage current monitoring device is normal, a deviation analysis is performed on the three-phase leakage current values to obtain the insulation state of the arrester, which can effectively identify the insulation state of the arrester. In addition, the present application also considers the reliability of the lightning impulse count and the arrester action monitoring device, and conducts multi-dimensional analysis on the arrester, thereby improving the accuracy of arrester monitoring.

[0088] The technical solution of the present application and how the technical solution of the present application solves the above technical problems will be described in detail below with specific embodiments. These several specific embodiments below can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below with reference to the accompanying drawings.

[0089] Figure 1 Flow schematic of the method for monitoring the operation of the arrester provided by the present application Figure 1 As Figure 1 shown, the method includes:

[0090] S101. Obtain the three-phase leakage current values recorded by the leakage current monitoring device in the lightning arrester, and the first lightning strike count within a preset duration recorded by the operation count monitoring device in the lightning arrester.

[0091] Among them, the three-phase leakage current refers to the magnitudes of the leakage currents flowing through the three phases of the lightning arrester respectively in a three-phase AC power system, and the three-phase AC power system transmits energy through three-phase electricity. The three-phase electricity consists of three AC voltages with the same frequency and a phase difference of 120° from each other, and is transmitted through three wires respectively. Further, the three phases are usually labeled as phase A, phase B, and phase C.

[0092] Furthermore, the preset duration can be set according to actual needs. For example, the preset duration is set to 2 hours.

[0093] S102. Determine whether the leakage current monitoring device is normal according to the three-phase leakage current values, and determine whether the operation count monitoring device is normal according to the first lightning strike count.

[0094] In this step, it can be understood that after determining the three-phase leakage current values through S101, it is necessary to determine whether the leakage current monitoring device is normal according to the three-phase leakage current values. This means that whether the leakage current monitoring device is normal is closely related to the obtained three-phase leakage current values.

[0095] Exemplarily, determining whether the leakage current monitoring device is normal according to the three-phase leakage current values includes: if any one of the three-phase leakage current values is zero, it is determined that the leakage current monitoring device is abnormal; if none of the three-phase leakage current values is zero, it is determined that the leakage current monitoring device is normal.

[0096] In this example, through the preliminary abnormal monitoring of the three-phase leakage current values, the faults of the leakage current monitoring device can be detected in time, avoiding subsequent analysis based on incorrect data, thereby improving the reliability of the data.

[0097] Further, after determining the first lightning strike count through S101, it is necessary to determine whether the operation count monitoring device is normal according to the first lightning strike count.

[0098] Exemplarily, determining whether the operation count monitoring device is normal according to the first lightning strike count includes: obtaining the second lightning strike count within the preset duration monitored by the traveling wave monitoring device; if the first lightning strike count is consistent with the second lightning strike count, it is determined that the operation count monitoring device is normal; if the first lightning strike count is inconsistent with the second lightning strike count, it is determined that the operation count monitoring device is abnormal.

[0099] Among them, the number of second lightning strikes within a preset duration monitored by the traveling wave monitoring device is obtained by continuously capturing the electromagnetic wave signals on the transmission line through the sensors built in the traveling wave device. When a lightning strike occurs, traveling wave signals with specific characteristics will be generated, such as high amplitude, steep rising edge, and so on. The data processing system in the traveling wave monitoring device can analyze these signals in real time. Through methods such as feature recognition, threshold judgment, or pattern recognition, it can accurately determine whether a lightning strike event has occurred. Once a lightning strike event is confirmed, the counter will automatically increment by one. The device will continuously monitor and accumulate the count until the preset duration is reached, such as 2 hours. After the preset duration, the device will record the total number of lightning strikes within the preset duration, that is, the number of second lightning strikes.

[0100] Compare the number of second lightning strikes with the number of first lightning strikes. If it is found that the number of second lightning strikes is the same as the number of first lightning strikes, it can be confirmed that the action times monitoring device is normal; if the number of first lightning strikes is different from the number of second lightning strikes, it is determined that the action times monitoring device is abnormal.

[0101] Through continuous monitoring and periodic counting, the traveling wave monitoring device can accurately count the number of lightning strikes within the preset duration, thereby improving the judgment accuracy of the action times monitoring device.

[0102] S103. If the leakage current monitoring device is normal, perform deviation analysis on the three-phase leakage current values to obtain the insulation state of the arrester.

[0103] In this step, it can be understood that when it is determined through S102 that the leakage current monitoring device is normal, deviation analysis is performed on the three-phase leakage current values to obtain the insulation state of the arrester. Among them, performing deviation analysis on the three-phase leakage current values is to analyze the three-phase leakage current values through a series of calculations and comparisons to evaluate the balance degree of the three-phase leakage current and the deviation degree of each phase of the leakage current from the normal value.

[0104] In the embodiment of the present application, the three-phase leakage current is obtained in real time through the leakage current monitoring device, thus avoiding the cumbersome processes of traditional manual inspection and data transcription, and greatly improving the efficiency of data acquisition; performing preliminary analysis on the three-phase leakage current values to determine whether the leakage current monitoring device is normal can timely detect the faults of the leakage current monitoring device and avoid subsequent ineffective data analysis, further improving the monitoring efficiency; when the leakage current monitoring device is normal, performing deviation analysis on the three-phase leakage current values to obtain the insulation state of the arrester can effectively identify the insulation state of the arrester; in addition, the present application also considers the reliability of the lightning strike times on the arrester action monitoring device, and performs multi-dimensional analysis on the arrester, thereby improving the accuracy of arrester monitoring.

[0105] Based on the above embodiments, deviation analysis is performed on the three-phase leakage current values to obtain the insulation state of the arrester, including: determining the leakage current difference of each phase according to the three-phase leakage current values and the three-phase leakage current reference values; if any of the leakage current differences of each phase exceeds the difference threshold, determining that the insulation state of the arrester is abnormal insulation; if none of the leakage current differences of each phase exceeds the difference threshold, determining the first deviation of the three-phase leakage current values according to the leakage current values of each phase; and determining the insulation state of the arrester according to the first deviation.

[0106] In this embodiment, it can be understood that when performing deviation analysis on the three-phase leakage current values, it is first necessary to determine the leakage current difference of each phase according to the three-phase leakage current values and the three-phase leakage current reference values. Among them, the three-phase leakage current reference value is related to the rated voltage level of the arrester.

[0107] In one implementation, assuming that the three phases are phase A, phase B, and phase C, when the rated voltage level of the arrester is 500 KV, the three-phase leakage current reference value Y N1 = 3 mA; the leakage current difference X A = Y N1 -Y A ; the leakage current difference X B = Y N1 -Y B ; the leakage current difference X C = Y N1 -Y C .

[0108] In another implementation, assuming that the three phases are phase A, phase B, and phase C, when the rated voltage level of the arrester is 200 KV and below 200 KV, the three-phase leakage current reference value Y 2 = 2 mA; the leakage current difference X A = Y N2 -Y A ; the leakage current difference X B =Y N2 -Y B ; the leakage current difference X C = Y N2 -Y C .

[0109] After determining the differences in the leakage current values of each phase, it is determined whether there is any leakage current difference among the leakage current differences of each phase that exceeds the difference threshold. If it is determined that there is any leakage current difference among the leakage current differences of each phase that exceeds the difference threshold, the insulation state of the arrester is determined to be abnormal insulation, where the difference threshold can be set according to actual requirements. For example, the difference threshold is set to 0. If the leakage current differences of each phase do not exceed the difference threshold, it is necessary to determine the first deviation of the three-phase leakage current values based on the leakage current values of each phase.

[0110] Further, determining the first deviation of the three-phase leakage current values based on the leakage current values of each phase includes: determining the absolute value of the current difference between any two phases according to the leakage current values of each phase; determining the minimum leakage current value from the leakage current values of each phase; determining the maximum absolute value of the current difference from multiple absolute values of the current differences; and dividing the maximum absolute value of the current difference by the minimum leakage current value to obtain the first deviation.

[0111] Exemplarily, assuming that the three phases are phase A, phase B, and phase C, it is necessary to determine the absolute value of the current difference S AB between phase A and phase B, the absolute value of the current difference S BC between phase B and phase C, and the absolute value of the current difference S AC between phase A and phase C. Then, from S AB , S BC , and S AC , determine the maximum absolute value of the current difference S max ; determine the minimum leakage current value Y A from the three-phase leakage current values Y B , Y C ; and finally divide the maximum absolute value of the current difference S min by the minimum leakage current value Y max to obtain the first deviation. The above calculation process of the first deviation can be described by the following formula: min

[0112]

[0113] where S 1 represents the first deviation.

[0114] By performing a preliminary deviation analysis on the three-phase leakage current values in the embodiment of the present application, when there is any leakage current difference among the leakage current differences of each phase that exceeds the difference threshold, the insulation state of the arrester can be directly determined to be abnormal insulation, achieving the improvement of the efficiency of judging the operation state of the arrester.

[0115] ​Based on the above embodiments, determining the insulation state of the lightning arrester according to the first deviation includes: if the first deviation is greater than or equal to the first deviation threshold, determining that the insulation state of the lightning arrester is abnormal insulation; if the first deviation is less than the first deviation threshold, determining the second deviation of each phase leakage current value in the three-phase leakage current values according to the initial values of the three-phase leakage current; and determining the insulation state of the lightning arrester according to the second deviation. This means that when determining the insulation state of the lightning arrester according to the first deviation, it is necessary to judge the magnitude between the first deviation and the first deviation threshold and take corresponding measures according to the judgment result. Among them, the first deviation threshold can be set according to the actual situation. For example, the first deviation threshold is set to 0.2.

[0116] If the first deviation is greater than or equal to 0.2, the insulation state of the lightning arrester can be directly determined to be abnormal insulation; if the first deviation is less than 0.2, it is also necessary to determine the second deviation of each phase leakage current value in the three-phase leakage current values according to the initial values of the three-phase leakage current. Among them, the initial values of the three-phase leakage current are the three-phase leakage current values obtained for the first time.

[0117] Further, determining the second deviation of each phase leakage current value in the three-phase leakage current values according to the initial values of the three-phase leakage current includes: for the target phase leakage current value in the three-phase leakage current values, determining the difference between the target phase leakage current value and the initial value of the target phase leakage current; and dividing the difference between the target phase leakage current value and the initial value of the target phase leakage current by the initial value of the target phase leakage current to obtain the second deviation of the target phase leakage current. It can be understood that when the target phase is phase A, the calculated value is the second deviation of phase A; when the target phase is phase B, the calculated value is the second deviation of phase B.

[0118] Further, the calculation process of the above second deviation can be described by the following formula:

[0119]

[0120]

[0121]

[0122] Among them, S A represents the second deviation of phase A; S B represents the second deviation of phase B; S C represents the second deviation of phase C; Y A represents the leakage current value of phase A; Y B represents the leakage current value of phase B; Y C represents the leakage current value of phase C; Y AN represents the initial value of the leakage current of phase A; Y BN represents the initial value of the leakage current of phase B; Y CN represents the initial value of the leakage current of phase C.

[0123] After determining the second deviation of the target phase leakage current value, the insulation state of the lightning arrester is determined according to the second deviation. Specifically, determining the insulation state of the lightning arrester according to the second deviation includes: if the second deviation is greater than or equal to the second deviation threshold, determining that the insulation state of the lightning arrester is insulation abnormality; if the first deviation is less than the first deviation threshold, determining that the insulation state of the lightning arrester is normal insulation. Among them, the second deviation threshold can be set according to the actual situation. For example, the second deviation threshold is set to 0.2. At this time, it is necessary to judge the magnitude relationship between the second deviation and 0.2. If the second deviation is greater than or equal to 0.2, it can be considered that the insulation state of the lightning arrester is insulation abnormality; if the second deviation is less than 0.2, it can be considered that the insulation state of the lightning arrester is normal insulation.

[0124] By performing secondary deviation analysis on the three-phase leakage current values in the embodiments of the present application and further confirming the lightning arresters with normal insulation state determined by the primary deviation analysis, the accuracy of determining the insulation state of the lightning arrester can be improved, thereby realizing the monitoring of the operation of the lightning arrester with a relatively high correct rate.

[0125] Based on the above embodiments, the lightning arrester operation monitoring method provided by the embodiments of the present application further includes: if any one of the leakage current monitoring device, the operation times monitoring device, and the insulation state appears abnormal, an alarm message corresponding to the abnormality is output, where the alarm message includes at least one of the following: sound alarm, light alarm, and short message alarm.

[0126] In this embodiment, it can be understood that if any one of the leakage current monitoring device, the operation times monitoring device, and the insulation state is monitored to be abnormal, the corresponding alarm message will be output.

[0127] In one implementation, if the leakage current monitoring device is monitored to be abnormal, a prompt message indicating that the leakage current monitoring device is abnormal is output.

[0128] In another implementation, if the leakage current device and the operation times monitoring device are monitored to be abnormal, a prompt message indicating that the leakage current monitoring device is abnormal and a prompt message indicating that the operation times monitoring device is abnormal are output.

[0129] In another implementation, if the leakage current device, the operation times monitoring device, and the insulation state are monitored to be abnormal, a prompt message indicating that the leakage current monitoring device is abnormal, a prompt message indicating that the operation times monitoring device is abnormal, and a prompt message indicating that the insulation of the lightning arrester is reduced are output.

[0130] It should be noted that the alarm information includes at least one of the following: sound alarm, light alarm, and SMS alarm. This means that the manifestation form of the alarm information can be selected according to the actual situation, and the embodiments of the present application do not limit this. For example, a sound alarm can be selected for output, or an SMS alarm and a sound alarm can be selected for output.

[0131] Further, the sound alarm refers to emitting a sound signal through an audio execution module, such as an alarm sound, a voice prompt, etc., to remind the operation and maintenance personnel to pay attention; the light alarm refers to emitting a light signal through an indicator light or other light-emitting devices, such as a flashing red light or yellow light, etc., to remind the operation and maintenance personnel to pay attention; the SMS alarm refers to sending alarm information to the mobile device of the operation and maintenance personnel through an SMS platform, facilitating the operation and maintenance personnel to timely understand the status of the lightning arrester.

[0132] In the embodiments of the present application, when any abnormality occurs in the leakage current monitoring device, the operation times monitoring device, and the insulation state, the alarm information corresponding to the abnormality is output, which can facilitate the operation and maintenance personnel to timely understand the operation status of the lightning arrester, quickly locate the fault, and take corresponding measures, avoiding overvoltage damage to power equipment caused by the failure of the lightning arrester, thereby improving the safety and reliability of the power system. It can also help the operation and maintenance personnel quickly locate the fault and take corresponding measures, thereby improving the operation and maintenance efficiency and reducing the maintenance cost.

[0133] Next, taking the leakage current monitoring device as a leakage current monitoring meter, the operation times monitoring device as an operation counter, and the lightning arrester as a gapless metal oxide lightning arrester as an example, how to use the lightning arrester operation monitoring method provided by the embodiments of the present application will be illustrated by examples. Figure 2 Flow schematic of the lightning arrester operation monitoring method provided by the embodiments of the present application Figure 2 , as Figure 2 shown, this method includes the following parts:

[0134] 1. With the help of an intelligent lightning arrester leakage current monitoring meter, when the line is under live operation, compare the obtained three-phase real-time leakage current values with the three-phase leakage current reference values. When any one of the three-phase real-time leakage current values is higher than the three-phase leakage current reference value, give an alarm for the reduction of the insulation of the lightning arrester; when a certain phase of the three-phase real-time leakage current is 0, give an alarm for the abnormality of the lightning arrester leakage current meter; when the traveling wave device detects a lightning strike but the operation counter of the lightning arrester does not change, give an alarm for the abnormality of the lightning arrester operation times counter;

[0135] 2. If any of the three-phase real-time leakage current values is less than or equal to the three-phase leakage current reference value, proceed to the next step. Determine the first deviation of the three-phase real-time leakage current values based on the real-time leakage current values of each phase. If the first deviation is greater than 20%, give an alarm for reduced insulation of the arrester. If the first deviation is less than 20%, continue to determine the second deviation of the real-time leakage current values of each phase in the three-phase real-time leakage current values based on the initial values of the three-phase real-time leakage current. If none of the multiple second deviations is less than 20%, give an alarm for reduced insulation of the arrester. If there is one second deviation less than 20% among the multiple second deviations, end this round of judgment and enter the next round.

[0136] Further, whether the line is operating live can be judged by the active power of the line current and voltage in the background. The three-phase leakage current reference value is related to the rated voltage level of the arrester. If the rated voltage level of the arrester is 500 KV, the three-phase leakage current reference value is 3 mA; if the rated voltage level of the arrester is 200 KV or below 200 KV, the three-phase leakage current reference value is 2 mA.

[0137] It should be noted that the calculation principles of the first deviation and the second deviation have been elaborated in detail in the previous embodiments, so they will not be repeated in the embodiments of the present application here.

[0138] In summary, the arrester operation monitoring method provided by the embodiments of the present application aims to solve the problems of inefficiency and lag in traditional manual inspections. This method makes full use of the applications of intelligent devices in the current digital substation, realizes the online reading of the data of the arrester monitoring meters, and thus gets rid of the limitation of manual transcription. By performing multi-dimensional analysis on the data read online, the operation status of the arrester can be evaluated more comprehensively and accurately, and potential abnormal situations can be detected in a timely manner. This early warning mechanism avoids the forced shutdown of equipment caused by sudden failures and effectively improves the safety and stability of the power system.

[0139] The following is the device embodiment of the present application, which can be used to execute the method embodiment of the present application. For the details not disclosed in the device embodiment of the present application, please refer to the method embodiment of the present application.

[0140] Figure 3 It is a schematic structural diagram of the arrester operation monitoring device provided by the present application, as Figure 3 shown. The arrester operation monitoring device 300 provided in this embodiment includes:

[0141] An acquisition module 301, configured to acquire the three-phase leakage current values recorded by the leakage current monitoring device in the arrester, and the first lightning strike times within a preset duration recorded by the action times monitoring device in the arrester;

[0142] A determination module 302, configured to determine whether the leakage current monitoring device is normal according to the three-phase leakage current values, and determine whether the action times monitoring device is normal according to the first lightning strike times;

[0143] An analysis module 303, configured to perform deviation analysis on the three-phase leakage current values to obtain the insulation state of the lightning arrester if the leakage current monitoring device is normal.

[0144] In a possible implementation manner, the analysis module 303 is specifically configured to:

[0145] Determine the leakage current difference of each phase according to the three-phase leakage current values and the three-phase leakage current reference values;

[0146] If any one of the leakage current differences of each phase exceeds the difference threshold, determine that the insulation state of the lightning arrester is insulation abnormality;

[0147] If the leakage current differences of each phase do not exceed the difference threshold, determine the first deviation of the three-phase leakage current values according to the leakage current values of each phase;

[0148] Determine the insulation state of the lightning arrester according to the first deviation.

[0149] In a possible implementation manner, the determination module 302 is specifically configured to:

[0150] Determine the absolute value of the current difference between any two phases according to the leakage current values of each phase;

[0151] Determine the minimum leakage current value from the leakage current values of each phase;

[0152] Determine the maximum absolute value of the current difference from multiple absolute values of the current differences;

[0153] Divide the maximum absolute value of the current difference by the minimum leakage current value to obtain the first deviation.

[0154] In a possible implementation manner, the determination module 302 is specifically configured to:

[0155] If the first deviation is greater than or equal to the first deviation threshold, determine that the insulation state of the lightning arrester is insulation abnormality;

[0156] If the first deviation is less than the first deviation threshold, determine the second deviation of the leakage current values of each phase in the three-phase leakage current values according to the initial three-phase leakage current values;

[0157] Determine the insulation state of the lightning arrester according to the second deviation.

[0158] In a possible implementation manner, the determination module 302 is specifically configured to:

[0159] For the leakage current value of the target phase among the three-phase leakage current values, determine the difference between the leakage current value of the target phase and the initial value of the leakage current of the target phase;

[0160] Divide the difference of the initial value of the leakage current of the target phase by the initial value of the leakage current of the target phase to obtain the second deviation of the leakage current of the target phase.

[0161] In a possible implementation manner, the determining module 302 is specifically configured to: if the second deviation is greater than or equal to the second deviation threshold, determine that the insulation state of the lightning arrester is abnormal insulation; if the first deviation is less than the first deviation threshold, determine that the insulation state of the lightning arrester is normal insulation.

[0162] In a possible implementation manner, the determining module 302 is specifically configured to: if any one of the three-phase leakage current values is zero, determine that the leakage current monitoring device is abnormal; if any one of the three-phase leakage current values is not zero, determine that the leakage current monitoring device is normal.

[0163] In a possible implementation manner, the lightning arrester operation monitoring device further includes a processing module (not shown), and the processing module is specifically configured to: if any one of the leakage current monitoring device, the action times monitoring device, and the insulation state is abnormal, output an alarm message corresponding to the abnormality, where the alarm message includes at least one of the following: sound alarm, light alarm, and short message alarm.

[0164] In a possible implementation manner, the determining module 302 is further configured to: obtain the second lightning strike shock times within a preset duration monitored by the traveling wave monitoring device; if the first lightning strike shock times are the same as the second lightning strike shock times, determine that the action times monitoring device is normal; if the first lightning strike shock times are not the same as the second lightning strike shock times, determine that the action times monitoring device is abnormal.

[0165] The lightning arrester operation monitoring device provided in this embodiment can execute the method provided in the above method embodiment, and its implementation principle and technical effect are similar, which will not be elaborated here in this embodiment.

[0166] It should be noted that it should be understood that the division of each module of the above device is only a division of logical functions. In actual implementation, it can be fully or partially integrated into a physical entity, or physically separated. And these modules can all be implemented in the form of software called by a processing element; they can also all be implemented in the form of hardware; or some modules can be implemented in the form of software called by a processing element, and some modules can be implemented in the form of hardware. For example, the processing module can be a separately established processing element, or can be integrated in a certain chip of the above device. In addition, it can also be stored in the memory of the above device in the form of program code, and the function of the above processing module is called and executed by a certain processing element of the above device. The implementation of other modules is similar. In addition, all or part of these modules can be integrated together or can be independently implemented. Here, the processing element can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each of the above modules can be completed by the integrated logic circuit of the hardware in the processor element or the instruction in the form of software.

[0167] For example, the above modules can be one or more integrated circuits configured to implement the above method, such as: one or more Application Specific Integrated Circuits (ASICs), or, one or more Digital Signal Processors (DSPs), or, one or more Field Programmable Gate Arrays (FPGAs), etc. Again, when a certain module above is implemented in the form of a processing element scheduling program code, the processing element can be a general-purpose processor, such as a Central Processing Unit (CPU) or other processors that can call program code. Again, these modules can be integrated together and implemented in the form of a System-On-a-Chip (SOC).

[0168] Figure 4 The structural schematic diagram of the electronic device provided by an embodiment of the present application. As Figure 4 shown, the electronic device 400 provided by the embodiment of the present application may include: a processor 401, and a memory 402 communicatively connected to the processor, where:

[0169] The memory stores computer-executable instructions;

[0170] The processor executes the computer-executable instructions stored in the memory to implement the method described in the foregoing method embodiment.

[0171] It should be understood that the processor 401 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), etc. The general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the method disclosed in combination with the application can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor. The memory 402 may include high-speed random access memory (RAM), and may also include non-volatile memory (NVM), such as at least one disk memory, and may also be a USB flash drive, a mobile hard disk, a read-only memory, a magnetic disk, or an optical disc, etc.

[0172] Optionally, the electronic device 400 may further include a communication interface 403. In a specific implementation, if the communication interface 403, the memory 402, and the processor 401 are implemented independently, the communication interface 403, the memory 402, and the processor 401 may be interconnected through a bus and communicate with each other. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc., but it does not mean that there is only one bus or one type of bus.

[0173] Optionally, in a specific implementation, if the communication interface 403, the memory 402, and the processor 401 are integrated on a single chip, the communication interface 403, the memory 402, and the processor 401 may communicate through an internal interface.

[0174] The embodiment of the present application further provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed, they are used to implement the method described in any of the foregoing embodiments.

[0175] It can be understood that the computer-readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM for short), electrically erasable programmable read-only memory (EEPROM for short), erasable programmable read-only memory (EPROM for short), programmable read-only memory (PROM for short), read-only memory (ROM for short), magnetic memory, flash memory, a magnetic disk or an optical disc. The readable storage medium can be any available medium accessible by a general-purpose or special-purpose computer.

[0176] An exemplary computer-readable storage medium is coupled to the processor, enabling the processor to read information from the computer-readable storage medium and write information to the computer-readable storage medium. Of course, the computer-readable storage medium can also be a component of the processor. The processor and the computer-readable storage medium can be located in an ASIC. Of course, the processor and the computer-readable storage medium can also exist as discrete components in an electronic device.

[0177] The integrated modules implemented in the form of software functional modules as described above can be stored in a computer-readable storage medium. The above-mentioned software functional modules stored in a computer-readable storage medium include several instructions for causing an electronic device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute some steps of the methods described in various embodiments of the present application.

[0178] The embodiments of the present application also provide a computer program product, including a computer program, which when executed implements the method described in any one of the foregoing embodiments.

[0179] It should be noted that for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the present application is not limited by the described action sequence, because according to the present application, some steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to the present application.

[0180] It should be further noted that although the steps in the flowchart are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise clearly stated in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowchart may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed alternately or in turn with at least a part of other steps or sub-steps or stages of other steps.

[0181] In the above embodiments, the descriptions of the various embodiments have their own emphases. For parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments. The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0182] Those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include known common general knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and the embodiments are only regarded as exemplary, and the true scope and spirit of the present application are pointed out by the following claims.

[0183] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A lightning arrester operation monitoring method, characterized in that: include: Obtaining the three-phase leakage current value recorded by the leakage current monitoring device in the arrester, and the number of first lightning impulses within a preset time length recorded by the action number monitoring device in the arrester; Determine whether the leakage current monitoring device is normal according to the three-phase leakage current value, and determine whether the action number monitoring device is normal according to the first lightning impulse number; If the leakage current monitoring device is normal, a deviation analysis is performed on the three-phase leakage current values ​​to obtain the insulation state of the arrester.

2. The method according to claim 1, characterized in that: The performing deviation analysis on the three-phase leakage current value to obtain the insulation state of the arrester includes: Determine the leakage current difference of each phase according to the three-phase leakage current value and the three-phase leakage current reference value; If any phase leakage current difference among the phase leakage current differences exceeds the difference threshold, determining that the insulation state of the arrester is insulation abnormality; If the difference of the leakage current of each phase does not exceed the difference threshold, determining the first deviation of the three-phase leakage current value according to the leakage current value of each phase; The insulation state of the arrester is determined according to the first deviation.

3. The method according to claim 2, characterized in that The step of determining the first deviation of the three-phase leakage current value according to the leakage current value of each phase includes: Determine the absolute value of the current difference between any two phases according to the leakage current value of each phase; Determining a minimum leakage current value from the leakage current values ​​of each phase; determining a maximum current difference absolute value from a plurality of current difference absolute values; The first deviation is obtained by dividing the absolute value of the maximum current difference by the minimum leakage current value.

4. The method according to claim 2, characterized in that: Determining the insulation state of the arrester according to the first deviation includes: If the first deviation is greater than or equal to a first deviation threshold, determining that the insulation state of the arrester is insulation abnormality; If the first deviation is less than a first deviation threshold, determining a second deviation of a leakage current value of each phase in the three-phase leakage current value according to the initial value of the three-phase leakage current; The insulation state of the arrester is determined based on the second deviation.

5. The method according to claim 4, characterized in that The step of determining the second deviation of the leakage current value of each phase in the three-phase leakage current value according to the initial value of the three-phase leakage current comprises: For a target phase leakage current value among the three-phase leakage current values, determining a difference between the target phase leakage current value and an initial value of the target phase leakage current; The difference between the initial values ​​of the target phase leakage current is divided by the initial value of the target phase leakage current to obtain a second deviation of the target phase leakage current.

6. The method according to claim 4, characterized in that Determining the insulation state of the arrester according to the second deviation includes: If the second deviation is greater than or equal to a second deviation threshold, determining that the insulation state of the arrester is insulation abnormality; If the first deviation is less than a first deviation threshold, it is determined that the insulation state of the arrester is normal.

7. The method according to any one of claims 1 to 6, characterized in that The step of determining whether the leakage current monitoring device is normal according to the three-phase leakage current value comprises: If any phase leakage current value among the three-phase leakage current values ​​is zero, it is determined that the leakage current monitoring device is abnormal; If any phase leakage current value among the three-phase leakage current values ​​is not zero, it is determined that the leakage current monitoring device is normal.

8. The method according to any one of claims 1 to 6, characterized in that Also includes: If any of the leakage current monitoring device, the operation number monitoring device and the insulation state is abnormal, an alarm message corresponding to the abnormality is output, wherein the alarm message includes at least one of the following: a sound alarm, a light alarm and a text message alarm.

9. The method according to any one of claims 1 to 6, characterized in that The determining, according to the first lightning impulse number, whether the action number monitoring device is normal includes: Obtaining the number of second lightning impulses within the preset time period monitored by the traveling wave monitoring device; If the first lightning strike impulse number is consistent with the second lightning strike impulse number, it is determined that the action number monitoring device is normal; If the first lightning strike impulse number is inconsistent with the second lightning strike impulse number, it is determined that the action number monitoring device is abnormal.

10. A lightning arrester operation monitoring device, characterized in that: include: An acquisition module, used to acquire the three-phase leakage current value recorded by the leakage current monitoring device in the arrester, and the first lightning impulse number within a preset time length recorded by the action number monitoring device in the arrester; A determination module, used to determine whether the leakage current monitoring device is normal according to the three-phase leakage current value, and determine whether the action number monitoring device is normal according to the first lightning impulse number; The analysis module is used to perform deviation analysis on the three-phase leakage current values ​​to obtain the insulation status of the arrester if the leakage current monitoring device is normal.

11. An electronic device, characterized in that: include: Memory, processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor performs the method according to any one of claims 1 to 10.

12. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 10 when executed by a processor.

13. A computer program product, characterized in that The invention comprises a computer program, which implements the method according to any one of claims 1 to 10 when being executed by a processor.

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