CN115902706A - Method, device and equipment for analyzing defects of lightning arrester and storage medium - Google Patents

Method, device and equipment for analyzing defects of lightning arrester and storage medium Download PDF

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CN115902706A
CN115902706A CN202310101809.2A CN202310101809A CN115902706A CN 115902706 A CN115902706 A CN 115902706A CN 202310101809 A CN202310101809 A CN 202310101809A CN 115902706 A CN115902706 A CN 115902706A
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current amplitude
target
amplitude
defect analysis
harmonic
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周原
魏俊涛
彭向阳
吴吉
李馨
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Guangdong Power Grid Co Ltd
Electric Power Research Institute of Guangdong Power Grid Co Ltd
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Guangdong Power Grid Co Ltd
Electric Power Research Institute of Guangdong Power Grid Co Ltd
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Abstract

The application discloses a defect analysis method, a device, equipment and a storage medium of an arrester, wherein a fundamental wave voltage amplitude, a third harmonic voltage amplitude, a fifth harmonic voltage amplitude and a first phase corresponding to each voltage amplitude of a bus voltage signal where the arrester is located, and a fundamental wave current amplitude, a third harmonic current amplitude, a fifth harmonic current amplitude and a second phase corresponding to each current amplitude of a leakage current signal are obtained; determining a target fundamental wave current amplitude, a target third harmonic current amplitude and a target fifth harmonic current amplitude which correspond to a second phase which is the same as the first phase in the leakage current signal; obtaining defect analysis data based on preset defect analysis conditions; and determining the defect type of the lightning arrester based on the defect analysis data. The monitoring and the comparison of the three important indexes are realized simultaneously, so that the accurate analysis of the state of the lightning arrester and the identification of the defect category of the lightning arrester are realized, and the monitoring accuracy of the state of the lightning arrester is improved.

Description

Method, device and equipment for analyzing defects of lightning arrester and storage medium
Technical Field
The application relates to the technical field of power grid safety, in particular to a method, a device, equipment and a storage medium for analyzing the defects of a lightning arrester.
Background
In a high-voltage power grid, a zinc oxide arrester is a protection device for protecting electrical equipment from being damaged by overvoltage, but the protection capability of the zinc oxide arrester is reduced due to the fact that a zinc oxide valve plate is affected by dampness, self aging, environmental pollution and operation under abnormal conditions. Therefore, it is necessary to monitor the condition of the zinc oxide arrester on line.
At present, the common method for monitoring the state of the arrester is to measure the resistive current of the zinc oxide arrester, and the measurement is divided into the measurement of the resistive current value and the measurement of the third harmonic component in the resistive current. However, the reference voltage signal needs to be acquired when the resistive current is measured, and PT short circuit may be caused in the process of acquiring the signal, so that the difficulty in acquiring the reference voltage signal is high. The problem of signal acquisition of PT can be avoided by measuring the third harmonic component, but the measurement interference is large and the judgment basis is lacked, so that only qualitative judgment can be carried out. Therefore, the problem of low monitoring accuracy exists in the current lightning arrester state monitoring.
Disclosure of Invention
The application provides a defect analysis method, device, equipment and storage medium of an arrester, and aims to solve the technical problem that monitoring accuracy is low in current arrester state monitoring.
In order to solve the above technical problem, in a first aspect, the present application provides a defect analysis method for an arrester, including:
acquiring a fundamental wave voltage amplitude, a third harmonic voltage amplitude, a fifth harmonic voltage amplitude and a first phase corresponding to each voltage amplitude of a voltage signal of a bus where the lightning arrester is located, and acquiring a fundamental wave current amplitude, a third harmonic current amplitude, a fifth harmonic current amplitude and a second phase corresponding to each current amplitude of a leakage current signal of the lightning arrester;
determining a target fundamental wave current amplitude, a target third harmonic current amplitude and a target fifth harmonic current amplitude corresponding to a second phase which is the same as the first phase in the leakage current signal according to the first phase and the second phase;
analyzing the target fundamental wave current amplitude, the target third harmonic current amplitude and the target fifth harmonic current amplitude based on preset defect analysis conditions to obtain defect analysis data;
determining a defect type of the arrester based on the defect analysis data.
In some implementations, the obtaining a fundamental voltage amplitude, a third harmonic voltage amplitude, a fifth harmonic voltage amplitude, and a first phase corresponding to each voltage amplitude of a bus voltage signal where the arrester is located, and obtaining a fundamental current amplitude, a third harmonic current amplitude, a fifth harmonic current amplitude, and a second phase corresponding to each current amplitude of a leakage current signal of the arrester include:
collecting a voltage signal of a bus where the lightning arrester is located and a leakage current signal of the lightning arrester;
performing Fourier operation on the voltage signal to obtain a fundamental wave voltage amplitude, a third harmonic voltage amplitude, a fifth harmonic voltage amplitude and a first phase corresponding to each voltage amplitude of the voltage signal;
and carrying out Fourier operation on the leakage current signal to obtain a fundamental current amplitude, a third harmonic current amplitude, a fifth harmonic current amplitude and a second phase corresponding to each current amplitude of the leakage current signal.
In some implementations, the determining, according to the first phase and the second phase, a target fundamental wave current amplitude, a target third harmonic current amplitude, and a target fifth harmonic current amplitude corresponding to a second phase of the leakage current signal that is the same as the first phase includes:
querying a target second phase of the leakage current signal that is the same as the first phase;
and extracting a current component corresponding to the target second phase in the leakage current signal based on an equivalent circuit relation of the lightning arrester, wherein the current component comprises a target fundamental wave current amplitude, a target third harmonic current amplitude and a target fifth harmonic current amplitude.
In some implementations, the analyzing the target fundamental current amplitude, the target third harmonic current amplitude, and the target fifth harmonic current amplitude based on a preset defect analysis condition to obtain defect analysis data includes:
comparing the target fundamental wave current amplitude with a primary measurement result or a previous measurement result based on the preset defect analysis condition to obtain first defect analysis data;
comparing the target third harmonic current amplitude with a primary measurement result or a previous measurement result based on the preset defect analysis condition to obtain second defect analysis data;
and comparing the target fifth harmonic current amplitude with the primary measurement result or the previous measurement result based on the preset defect analysis condition to obtain third defect analysis data.
In some implementations, the determining the defect type of the arrester based on the defect analysis data includes:
and determining the defect type of the lightning arrester according to the first defect analysis data, the second defect analysis data and the third defect analysis data by utilizing the corresponding relation between the preset defect type and the defect analysis data.
In a second aspect, the present application also provides a defect analysis device for an arrester, including:
the acquisition module is used for acquiring a fundamental wave voltage amplitude, a third harmonic voltage amplitude, a fifth harmonic voltage amplitude and a first phase corresponding to each voltage amplitude of a voltage signal of a bus where the lightning arrester is located, and acquiring a fundamental wave current amplitude, a third harmonic current amplitude, a fifth harmonic current amplitude and a second phase corresponding to each current amplitude of a leakage current signal of the lightning arrester;
a first determining module, configured to determine, according to the first phase and the second phase, a target fundamental wave current amplitude, a target third harmonic current amplitude, and a target fifth harmonic current amplitude corresponding to a second phase, which is the same as the first phase, in the leakage current signal;
the analysis module is used for analyzing the target fundamental wave current amplitude, the target third harmonic current amplitude and the target fifth harmonic current amplitude based on preset defect analysis conditions to obtain defect analysis data;
and the second determining module is used for determining the defect type of the lightning arrester based on the defect analysis data.
In some implementations, the analysis module is specifically configured to:
comparing the target fundamental wave current amplitude with a primary measurement result or a previous measurement result based on the preset defect analysis condition to obtain first defect analysis data;
comparing the target third harmonic current amplitude with a primary measurement result or a previous measurement result based on the preset defect analysis condition to obtain second defect analysis data;
and comparing the target fifth harmonic current amplitude with the primary measurement result or the previous measurement result based on the preset defect analysis condition to obtain third defect analysis data.
In some implementations, the second determining module is specifically configured to:
and determining the defect type of the lightning arrester according to the first defect analysis data, the second defect analysis data and the third defect analysis data by utilizing the corresponding relation between the preset defect type and the defect analysis data.
In a third aspect, the present application further provides a computer device comprising a processor and a memory for storing a computer program, which when executed by the processor, implements the method for defect analysis of a lightning arrester according to the first aspect.
In a fourth aspect, the present application also provides a computer-readable storage medium storing a computer program, which when executed by a processor, implements the method for analyzing the defects of the arrester according to the first aspect.
Compared with the prior art, the application has the following beneficial effects at least:
obtaining a fundamental wave voltage amplitude, a third harmonic voltage amplitude, a fifth harmonic voltage amplitude and a first phase corresponding to each voltage amplitude of a voltage signal of a bus where the lightning arrester is located, and obtaining a fundamental wave current amplitude, a third harmonic current amplitude, a fifth harmonic current amplitude and a second phase corresponding to each current amplitude of a leakage current signal of the lightning arrester; determining a target fundamental wave current amplitude, a target third harmonic current amplitude and a target fifth harmonic current amplitude corresponding to a second phase, which is the same as the first phase, in the leakage current signal according to the first phase and the second phase; analyzing the target fundamental wave current amplitude, the target third harmonic current amplitude and the target fifth harmonic current amplitude based on preset defect analysis conditions to obtain defect analysis data; determining a defect type of the arrester based on the defect analysis data. The monitoring and the comparison of the three important indexes are realized simultaneously, and the three important indexes are used as examination objects, so that the accurate analysis of the state of the arrester and the identification of the defect category of the arrester are realized, and the monitoring accuracy of the state of the arrester is improved.
Drawings
Fig. 1 is a schematic flow chart illustrating a method for analyzing defects of an arrester according to an embodiment of the present application;
fig. 2 is a schematic diagram of an equivalent circuit and vector relationship of a zinc oxide arrester according to an embodiment of the present application;
fig. 3 is a schematic structural view of a defect analysis device for an arrester according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a computer device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
Referring to fig. 1, fig. 1 is a schematic flowchart of a defect analysis method for an arrester according to an embodiment of the present disclosure. The defect analysis method for the lightning arrester can be applied to computer equipment, and the computer equipment comprises equipment such as but not limited to a smart phone, a notebook computer, a tablet computer, a desktop computer, a physical server and a cloud server. As shown in fig. 1, the method for analyzing the defect of the arrester of the present embodiment includes steps S101 to S104, which are detailed as follows:
step S101, obtaining a fundamental wave voltage amplitude, a third harmonic voltage amplitude, a fifth harmonic voltage amplitude and a first phase corresponding to each voltage amplitude of a voltage signal of a bus where the lightning arrester is located, and obtaining a fundamental wave current amplitude, a third harmonic current amplitude, a fifth harmonic current amplitude and a second phase corresponding to each current amplitude of a leakage current signal of the lightning arrester.
Step S102, determining a target fundamental wave current amplitude, a target third harmonic current amplitude and a target fifth harmonic current amplitude corresponding to a second phase, which is the same as the first phase, in the leakage current signal according to the first phase and the second phase.
Step S103, analyzing the target fundamental wave current amplitude, the target third harmonic current amplitude and the target fifth harmonic current amplitude based on preset defect analysis conditions to obtain defect analysis data.
And S104, determining the defect type of the lightning arrester based on the defect analysis data.
In this embodiment, a voltage monitoring device installed in a substation (for example, a voltage monitoring device installed on a secondary side of a bus PT or a voltage monitoring device of other contact or non-contact methods) and a lightning arrester leakage current testing device perform wireless communication, so as to realize simultaneous determination of multiple indicators of a lightning arrester. Compared with the problem that the accuracy is poor when the testing is only carried out on one characteristic quantity of resistive current fundamental wave components or third harmonic waves in the past, the method and the device measure the resistive current fundamental wave components, the third harmonic waves and the fifth harmonic waves of the arrester simultaneously as criteria, and the testing accuracy is greatly improved.
In some embodiments, the step S101 includes:
collecting a voltage signal of a bus where the lightning arrester is located and a leakage current signal of the lightning arrester;
performing Fourier operation on the voltage signal to obtain a fundamental wave voltage amplitude, a third harmonic voltage amplitude, a fifth harmonic voltage amplitude and a first phase corresponding to each voltage amplitude of the voltage signal;
and carrying out Fourier operation on the leakage current signal to obtain a fundamental current amplitude, a third harmonic current amplitude, a fifth harmonic current amplitude and a second phase corresponding to each current amplitude of the leakage current signal.
In this embodiment, a voltage monitoring device is installed on the secondary side of a voltage sensor such as a transformer to obtain the fundamental wave and harmonic voltage phase of a transformer substation, and a full-cycle fourier operation is performed on the voltage signals of at least two collected cycles every N sampling points to obtain a voltage amplitude U of the fundamental wave passing through the system power frequency 1 And a corresponding first phase
Figure BDA0004073326010000061
Third harmonic voltage amplitude U 3 And a corresponding first phase->
Figure BDA0004073326010000062
Fifth harmonic voltage amplitude U 5 And a corresponding first phase->
Figure BDA0004073326010000063
The method comprises the steps of synchronously acquiring leakage current signals of the lightning arrester by adopting a current sensor at a grounding end of the lightning arrester of a transformer substation, and carrying out full-cycle Fourier operation on the acquired current signals of at least two cycles every N sampling points to obtain a fundamental wave current amplitude I of the lightning arrester 1 And a corresponding second phase +>
Figure BDA0004073326010000064
Third harmonic current amplitude I 3 And a corresponding second phase->
Figure BDA0004073326010000065
Fifth harmonic current amplitude I 5 And a corresponding second phase->
Figure BDA0004073326010000066
In some embodiments, the step S102 includes:
querying a target second phase of the leakage current signal that is the same as the first phase;
and extracting a current component corresponding to the target second phase in the leakage current signal based on an equivalent circuit relation of the lightning arrester, wherein the current component comprises a target fundamental wave current amplitude, a target third harmonic current amplitude and a target fifth harmonic current amplitude.
In this embodiment, a wireless communication mode (such as bluetooth, wifi, etc.) is adopted to realize data transmission between the voltage monitoring device and the current sensor, and the voltage phase is compared
Figure BDA0004073326010000067
And the current phase of the lightning arrester>
Figure BDA0004073326010000068
The phase angle difference between the two phases; based on the equivalent circuit versus vector diagram as shown in FIG. 2, by pairing ≥ er>
Figure BDA0004073326010000069
And &>
Figure BDA00040733260100000610
Comparing to obtain the neutral current of the lightning arrester fundamental wave
Figure BDA00040733260100000611
The current components having the same phase are the fundamental resistive current amplitude (target fundamental current amplitude) K in the leakage current 1 . In the same way, compare>
Figure BDA00040733260100000612
And &>
Figure BDA00040733260100000613
Obtaining the target third harmonic current amplitude K 3 And contrast->
Figure BDA00040733260100000614
And &>
Figure BDA00040733260100000615
Obtaining the target fifth harmonic current amplitude K 5 。
In some embodiments, the step S103 includes:
comparing the target fundamental wave current amplitude with a primary measurement result or a previous measurement result based on the preset defect analysis condition to obtain first defect analysis data;
comparing the target third harmonic current amplitude with a primary measurement result or a previous measurement result based on the preset defect analysis condition to obtain second defect analysis data;
and comparing the target fifth harmonic current amplitude with the primary measurement result or the previous measurement result based on the preset defect analysis condition to obtain third defect analysis data.
In the present embodiment, when one or more preset defect analysis conditions are satisfied, the arrester is considered to be defective. The preset defect analysis conditions include:
condition 1: the ratio of the fundamental current amplitude K1 to the measured value in the initial installation or the previous measurement is larger than a certain value (such as 50%);
condition 2: the ratio of the 3 th harmonic to the measured value in the first installation or the previous measurement is larger than a certain value (such as 100%);
condition 3: the ratio of the 5-wave to the value measured at the initial installation or the previous measurement is greater than a certain value (e.g., 100%).
In some embodiments, the step S104 includes:
and determining the defect type of the lightning arrester according to the first defect analysis data, the second defect analysis data and the third defect analysis data by utilizing the corresponding relation between the preset defect type and the defect analysis data.
In this embodiment, if the ratio of the condition 1 rises significantly, but the conditions 2 and 3 are not significant, it is determined that the lightning arrester is highly likely to be dampened; if the ratio of the condition 2 or the ratio of the condition 3 rises significantly, it is determined that the possibility of deterioration of the arrester is high.
It should be noted that, compared with the related art that only one of the fundamental wave and the third harmonic wave is tested, because the characteristic quantities corresponding to different defects are different, the previous test accuracy is poor, and because the difficulty in obtaining the voltage reference signal temporarily is high, the risk of short circuit of the transformer is increased due to the existence of the voltage signal obtained on site, the method and the device adopt the wireless communication mode to realize information transmission between the current sensor and the voltage sensor, and use the reference voltage as a voltage monitoring device stably installed for a long time (such as a voltage monitoring device installed on the secondary side of a bus PT or a voltage monitoring device of other contact and non-contact methods), so that the three important indexes can be monitored and compared at the same time and used as an examination object, thereby realizing the accurate analysis of the state of the lightning arrester and the identification of the defect type of the lightning arrester.
The defect analysis method of the lightning arrester is corresponding to the method embodiment, so that corresponding functions and technical effects are achieved. Referring to fig. 3, fig. 3 is a block diagram illustrating a defect analyzing apparatus for an arrester according to an embodiment of the present application. For convenience of explanation, only a part related to the present embodiment is shown, and the defect analyzing apparatus for an arrester according to the embodiment of the present application includes:
the acquisition module 301 is configured to acquire a fundamental wave voltage amplitude, a third harmonic voltage amplitude, a fifth harmonic voltage amplitude, and a first phase corresponding to each voltage amplitude of a bus voltage signal where the arrester is located, and acquire a fundamental wave current amplitude, a third harmonic current amplitude, a fifth harmonic current amplitude, and a second phase corresponding to each current amplitude of a leakage current signal of the arrester;
a first determining module 302, configured to determine, according to the first phase and the second phase, a target fundamental wave current amplitude, a target third harmonic current amplitude, and a target fifth harmonic current amplitude corresponding to a second phase, which is the same as the first phase, in the leakage current signal;
the analysis module 303 is configured to analyze the target fundamental wave current amplitude, the target third harmonic current amplitude, and the target fifth harmonic current amplitude based on a preset defect analysis condition to obtain defect analysis data;
a second determining module 304 for determining a defect type of the arrester based on the defect analysis data.
In some embodiments, the obtaining module 301 is specifically configured to:
collecting a voltage signal of a bus where the lightning arrester is located and a leakage current signal of the lightning arrester;
performing Fourier operation on the voltage signal to obtain a fundamental wave voltage amplitude, a third harmonic voltage amplitude, a fifth harmonic voltage amplitude and a first phase corresponding to each voltage amplitude of the voltage signal;
and carrying out Fourier operation on the leakage current signal to obtain a fundamental current amplitude, a third harmonic current amplitude, a fifth harmonic current amplitude and a second phase corresponding to each current amplitude of the leakage current signal.
In some embodiments, the first determining module 302 is specifically configured to:
querying a target second phase of the leakage current signal that is the same as the first phase;
and extracting a current component corresponding to the target second phase in the leakage current signal based on an equivalent circuit relation of the lightning arrester, wherein the current component comprises a target fundamental wave current amplitude, a target third harmonic current amplitude and a target fifth harmonic current amplitude.
In some embodiments, the analysis module 303 is specifically configured to:
comparing the target fundamental current amplitude with a primary measurement result or a previous measurement result based on the preset defect analysis condition to obtain first defect analysis data;
comparing the target third harmonic current amplitude with a primary measurement result or a previous measurement result based on the preset defect analysis condition to obtain second defect analysis data;
and comparing the target fifth harmonic current amplitude with the primary measurement result or the previous measurement result based on the preset defect analysis condition to obtain third defect analysis data.
In some embodiments, the second determining module 304 is specifically configured to:
and determining the defect type of the lightning arrester according to the first defect analysis data, the second defect analysis data and the third defect analysis data by utilizing the corresponding relation between the preset defect type and the defect analysis data.
The defect analysis device of the lightning arrester can implement the defect analysis method of the lightning arrester of the above method embodiment. The alternatives in the above-described method embodiments are also applicable to this embodiment and will not be described in detail here. The rest of the embodiments of the present application may refer to the contents of the above method embodiments, and in this embodiment, details are not described again.
Fig. 4 is a schematic structural diagram of a computer device according to an embodiment of the present application. As shown in fig. 4, the computer device 4 of this embodiment includes: at least one processor 40 (only one shown in fig. 4), a memory 41, and a computer program 42 stored in the memory 41 and executable on the at least one processor 40, the steps of any of the above-described method embodiments being implemented when the computer program 42 is executed by the processor 40.
The computer device 4 may be a computing device such as a smart phone, a tablet computer, a desktop computer, and a cloud server. The computer device may include, but is not limited to, a processor 40, a memory 41. Those skilled in the art will appreciate that fig. 4 is merely an example of the computer device 4 and does not constitute a limitation of the computer device 4, and may include more or less components than those shown, or combine certain components, or different components, such as input output devices, network access devices, etc.
The Processor 40 may be a Central Processing Unit (CPU), and the Processor 40 may be other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 41 may in some embodiments be an internal storage unit of the computer device 4, such as a hard disk or a memory of the computer device 4. The memory 41 may also be an external storage device of the computer device 4 in other embodiments, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are provided on the computer device 4. Further, the memory 41 may also include both an internal storage unit and an external storage device of the computer device 4. The memory 41 is used for storing an operating system, an application program, a BootLoader (BootLoader), data, and other programs, such as program codes of the computer program. The memory 41 may also be used to temporarily store data that has been output or is to be output.
In addition, an embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements the steps in any of the method embodiments described above.
The embodiments of the present application provide a computer program product, which when executed on a computer device, enables the computer device to implement the steps in the above method embodiments.
In several embodiments provided herein, it will be understood that each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, and various media capable of storing program codes.
The above-mentioned embodiments are provided to further explain the objects, technical solutions and advantages of the present application in detail, and it should be understood that the above-mentioned embodiments are only examples of the present application and are not intended to limit the scope of the present application. It should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application as defined by the appended claims.

Claims (10)

1. A defect analysis method of a lightning arrester is characterized by comprising the following steps:
acquiring a fundamental wave voltage amplitude, a third harmonic voltage amplitude, a fifth harmonic voltage amplitude and a first phase corresponding to each voltage amplitude of a voltage signal of a bus where the lightning arrester is located, and acquiring a fundamental wave current amplitude, a third harmonic current amplitude, a fifth harmonic current amplitude and a second phase corresponding to each current amplitude of a leakage current signal of the lightning arrester;
determining a target fundamental wave current amplitude, a target third harmonic current amplitude and a target fifth harmonic current amplitude corresponding to a second phase which is the same as the first phase in the leakage current signal according to the first phase and the second phase;
analyzing the target fundamental wave current amplitude, the target third harmonic current amplitude and the target fifth harmonic current amplitude based on preset defect analysis conditions to obtain defect analysis data;
determining a defect type of the arrester based on the defect analysis data.
2. The method for analyzing the defects of the lightning arrester according to claim 1, wherein the obtaining of the fundamental voltage amplitude, the third harmonic voltage amplitude, the fifth harmonic voltage amplitude and the first phase corresponding to each voltage amplitude of the voltage signal of the bus where the lightning arrester is located, and the obtaining of the fundamental current amplitude, the third harmonic current amplitude, the fifth harmonic current amplitude and the second phase corresponding to each current amplitude of the leakage current signal of the lightning arrester comprises:
collecting a voltage signal of a bus where the lightning arrester is located and a leakage current signal of the lightning arrester;
performing Fourier operation on the voltage signal to obtain a fundamental wave voltage amplitude, a third harmonic voltage amplitude, a fifth harmonic voltage amplitude and a first phase corresponding to each voltage amplitude of the voltage signal;
and performing Fourier operation on the leakage current signal to obtain a fundamental current amplitude, a third harmonic current amplitude, a fifth harmonic current amplitude and a second phase corresponding to each current amplitude of the leakage current signal.
3. The method for analyzing defects of an arrester according to claim 1, wherein the determining a target fundamental wave current amplitude, a target third harmonic current amplitude and a target fifth harmonic current amplitude corresponding to a second phase of the leakage current signal, which is the same as the first phase, based on the first phase and the second phase comprises:
querying a target second phase of the leakage current signal that is the same as the first phase;
and extracting a current component corresponding to the target second phase in the leakage current signal based on an equivalent circuit relation of the lightning arrester, wherein the current component comprises a target fundamental wave current amplitude, a target third harmonic current amplitude and a target fifth harmonic current amplitude.
4. The method for analyzing defects of an arrester according to claim 1, wherein the analyzing the target fundamental current amplitude, the target third harmonic current amplitude and the target fifth harmonic current amplitude based on preset defect analysis conditions to obtain defect analysis data comprises:
comparing the target fundamental wave current amplitude with a primary measurement result or a previous measurement result based on the preset defect analysis condition to obtain first defect analysis data;
comparing the target third harmonic current amplitude with a primary measurement result or a previous measurement result based on the preset defect analysis condition to obtain second defect analysis data;
and comparing the target fifth harmonic current amplitude with the primary measurement result or the previous measurement result based on the preset defect analysis condition to obtain third defect analysis data.
5. The method of analyzing defects of an arrester according to claim 1, wherein the determining the type of the defects of the arrester based on the defect analysis data includes:
and determining the defect type of the lightning arrester according to the first defect analysis data, the second defect analysis data and the third defect analysis data by utilizing the corresponding relation between the preset defect type and the defect analysis data.
6. A defect analysis device for a lightning arrester, comprising:
the acquisition module is used for acquiring a fundamental wave voltage amplitude, a third harmonic voltage amplitude, a fifth harmonic voltage amplitude and a first phase corresponding to each voltage amplitude of a voltage signal of a bus where the lightning arrester is located, and acquiring a fundamental wave current amplitude, a third harmonic current amplitude, a fifth harmonic current amplitude and a second phase corresponding to each current amplitude of a leakage current signal of the lightning arrester;
a first determining module, configured to determine, according to the first phase and the second phase, a target fundamental wave current amplitude, a target third harmonic current amplitude, and a target fifth harmonic current amplitude corresponding to a second phase, which is the same as the first phase, in the leakage current signal;
the analysis module is used for analyzing the target fundamental wave current amplitude, the target third harmonic current amplitude and the target fifth harmonic current amplitude based on preset defect analysis conditions to obtain defect analysis data;
and the second determining module is used for determining the defect type of the lightning arrester based on the defect analysis data.
7. A defect analysis device of a lightning arrester according to claim 6, characterized in that the analysis module is specifically configured to:
comparing the target fundamental wave current amplitude with a primary measurement result or a previous measurement result based on the preset defect analysis condition to obtain first defect analysis data;
comparing the target third harmonic current amplitude with a primary measurement result or a previous measurement result based on the preset defect analysis condition to obtain second defect analysis data;
and comparing the target fifth harmonic current amplitude with the primary measurement result or the previous measurement result based on the preset defect analysis condition to obtain third defect analysis data.
8. A defect analysis device of a lightning arrester according to claim 6, characterized in that the second determination module is specifically configured to:
and determining the defect type of the lightning arrester according to the first defect analysis data, the second defect analysis data and the third defect analysis data by utilizing the corresponding relation between the preset defect type and the defect analysis data.
9. A computer arrangement, characterized by comprising a processor and a memory for storing a computer program which, when executed by the processor, implements a method of defect analysis of a lightning arrester as claimed in any one of claims 1 to 5.
10. A computer-readable storage medium, characterized in that it stores a computer program which, when executed by a processor, implements a defect analysis method of an arrester according to any one of claims 1 to 5.
CN202310101809.2A 2023-02-08 2023-02-08 Method, device and equipment for analyzing defects of lightning arrester and storage medium Pending CN115902706A (en)

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