CN114660413A - Method and device for detecting defects of conducting wire of power transmission line - Google Patents

Method and device for detecting defects of conducting wire of power transmission line Download PDF

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Publication number
CN114660413A
CN114660413A CN202210316816.XA CN202210316816A CN114660413A CN 114660413 A CN114660413 A CN 114660413A CN 202210316816 A CN202210316816 A CN 202210316816A CN 114660413 A CN114660413 A CN 114660413A
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electromagnetic
spectrum distribution
wire
electromagnetic spectrum
power transmission
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CN202210316816.XA
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Inventor
缪钟灵
张广洲
姚隽雯
吴念
刘平原
柯贤彬
李梦齐
龚浩
别士光
刘锋
陈程
朱劲松
白波
潘晓敏
李强
施源
汪小武
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Wuhan NARI Ltd
Guangdong Power Grid Co Ltd
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Wuhan NARI Ltd
Guangdong Power Grid Co Ltd
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Priority to CN202210316816.XA priority Critical patent/CN114660413A/en
Publication of CN114660413A publication Critical patent/CN114660413A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/088—Aspects of digital computing

Abstract

The application discloses a method and a device for detecting the defects of a wire of a power transmission line, wherein the electromagnetic interference signal of the power transmission wire is obtained, and a spectrum analyzer is utilized to carry out spectrum analysis on the electromagnetic interference signal to obtain the electromagnetic interference value of the power transmission wire, so that the defect detection is realized by utilizing the electromagnetic field change of the power transmission wire by utilizing the characteristic that the electromagnetic field around the power transmission wire changes when the power transmission wire has the defects of aging, strand breakage and the like of a line; and then, according to the target correlation between the broken strand defect of the conductor and the electromagnetic spectrum distribution, performing correlation analysis on the electromagnetic interference value to obtain the defect condition of the power transmission conductor, so that the defect detection can be still performed by using the method under the condition that the defect detection cannot be performed by using image recognition, infrared recognition and the like.

Description

Method and device for detecting defects of conducting wire of power transmission line
Technical Field
The application relates to the technical field of power grids, in particular to a method and a device for detecting a wire defect of a power transmission line.
Background
When the high-voltage transmission line transmits electric power, the wire may be damaged, aged or damaged due to weather influences such as rain, snow, lightning and the like. If the handling is not performed in time, the strand-broken wire can be rapidly strained, disconnected and even short-circuited near the strand-broken point, so that serious consequences such as service data interruption, large-area power failure and even equipment personnel loss are caused. Therefore, the high-voltage transmission line is subjected to strand breakage detection to ensure the safe and reliable transmission line and the normal operation of power equipment.
At present, the traditional detection method is mainly used for identifying the defects of the power transmission line by observation means such as an image recognition method or an infrared recognition method. However, when the power transmission line has defects such as strand breakage, the line generates electromagnetic interference level changes, and the traditional observation means is easily interfered by electromagnetic environment, so that the traditional observation means cannot well detect the defects of the conducting wire, and the detection result accuracy of the traditional observation means is not high.
Disclosure of Invention
The application provides a method and a device for detecting a wire defect of a power transmission line, which aim to solve the technical problem of low accuracy of a current detection result.
In order to solve the above technical problem, in a first aspect, the present application provides a method for detecting a wire defect of a power transmission line, including:
acquiring an electromagnetic interference signal of a power transmission conductor;
performing spectrum analysis on the electromagnetic interference signal by using a spectrum analyzer to obtain an electromagnetic interference value of the power transmission conductor;
and performing correlation analysis on the electromagnetic interference value according to the target correlation between the strand breakage defect of the conductor and the electromagnetic spectrum distribution to obtain the defect condition of the power transmission conductor.
According to the method, the electromagnetic interference signal of the power transmission conductor is obtained, the spectrum analyzer is utilized to perform spectrum analysis on the electromagnetic interference signal, the electromagnetic interference value of the power transmission conductor is obtained, and the defect detection is realized by utilizing the electromagnetic field change of the power transmission conductor by utilizing the characteristic that the electromagnetic field around the power transmission conductor changes when the power transmission conductor has the defects of line aging, strand breakage and the like; and then, according to the target correlation between the broken strand defect of the conductor and the electromagnetic spectrum distribution, performing correlation analysis on the electromagnetic interference value to obtain the defect condition of the power transmission conductor, so that the defect detection can be still performed by using the method under the condition that the defect detection cannot be performed by using image recognition, infrared recognition and the like.
Preferably, before the correlation analysis is performed on the electromagnetic interference value according to the target correlation between the strand breakage defect of the power transmission line and the electromagnetic spectrum distribution to obtain the defect condition of the power transmission line, the method further comprises the following steps:
acquiring first electromagnetic spectrum distribution of a normal wire and second electromagnetic spectrum distribution of a defective wire;
and comparing the first electromagnetic spectrum distribution with the second electromagnetic spectrum distribution to obtain the target correlation between the broken strand defect of the wire and the electromagnetic spectrum distribution.
Preferably, the acquiring a first electromagnetic spectrum distribution of the normal wire and a second electromagnetic spectrum distribution of the defective wire includes:
acquiring a first electromagnetic signal set of a normal wire and a second electromagnetic signal set of a defective wire according to a preset measuring point;
and performing spectrum analysis on the first electromagnetic signal set and the second electromagnetic signal set by using a spectrum analyzer to obtain first electromagnetic spectrum distribution and second electromagnetic spectrum distribution.
Preferably, comparing the first electromagnetic spectrum distribution with the second electromagnetic spectrum distribution to obtain the target correlation between the wire strand breakage defect and the electromagnetic spectrum distribution, includes:
calculating electromagnetic field parameters of preset measuring points based on a preset antenna model;
performing data verification on the electromagnetic field parameters and the first electromagnetic spectrum distribution and the second electromagnetic spectrum distribution;
and if the data passes the verification, comparing the first electromagnetic spectrum distribution with the second electromagnetic spectrum distribution to obtain the target correlation.
Preferably, the calculating the electromagnetic field parameters of the preset measuring points based on the preset antenna model comprises:
taking a single corona source during corona discharge as an element current section, and acquiring a positive corona parameter of the corona source;
and calculating the electromagnetic field parameters of the preset measuring point according to the positive corona parameters and the distance between the preset measuring point and the corona discharge point by using the preset antenna model.
In a second aspect, the present application provides a wire defect detection device for a power transmission line, comprising:
the first acquisition module is used for acquiring electromagnetic interference signals of the power transmission conductors;
the frequency spectrum analysis module is used for carrying out frequency spectrum analysis on the electromagnetic interference signals by using a frequency spectrum analyzer to obtain electromagnetic interference values of the power transmission conductors;
and the correlation analysis module is used for carrying out correlation analysis on the electromagnetic interference value according to the target correlation between the broken strand defect of the wire and the electromagnetic spectrum distribution to obtain the defect condition of the power transmission wire.
Preferably, the apparatus further comprises:
the second acquisition module is used for acquiring first electromagnetic spectrum distribution of the normal wire and second electromagnetic spectrum distribution of the defective wire;
and the comparison module is used for comparing the first electromagnetic spectrum distribution with the second electromagnetic spectrum distribution to obtain the target correlation between the broken strand defect of the lead and the electromagnetic spectrum distribution.
Preferably, the comparison module comprises:
the calculation unit is used for calculating the electromagnetic field parameters of the preset measurement points based on the preset antenna model;
the verification unit is used for carrying out data verification on the electromagnetic field parameters and the first electromagnetic spectrum distribution and the second electromagnetic spectrum distribution;
and the comparison unit is used for comparing the first electromagnetic spectrum distribution with the second electromagnetic spectrum distribution to obtain the target correlation if the data verification is passed.
In a third aspect, the present application provides an electronic device comprising a processor and a memory for storing a computer program, the computer program when executed by the processor implementing the wire defect detection method according to the first aspect.
In a fourth aspect, the present application provides a computer-readable storage medium storing a computer program which, when executed by a processor, implements the wire defect detection method according to the first aspect.
Please refer to the relevant description of the first aspect for the beneficial effects of the second to fourth aspects, which are not repeated herein.
Drawings
Fig. 1 is a schematic flow chart of a method for detecting a wire defect of a power transmission line according to an embodiment of the present application;
FIG. 2 is a schematic diagram illustrating a distribution of measurement points according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of an antenna model according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a wire defect detection device of a power transmission line according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
As described in the related art, the conventional detection method mainly identifies the defects of the power transmission line by using an observation means such as an image recognition method or an infrared recognition method. However, when the power transmission line has defects such as strand breakage, the line generates electromagnetic interference level changes, and the traditional observation means is easily interfered by electromagnetic environment, so that the traditional observation means cannot well detect the defects of the conducting wire, and the detection result accuracy of the traditional observation means is not high.
Therefore, the embodiment of the application provides a method for detecting the defects of the conducting wires of the power transmission line, which comprises the steps of obtaining electromagnetic interference signals of the conducting wires of the power transmission line, carrying out spectrum analysis on the electromagnetic interference signals by using a spectrum analyzer to obtain electromagnetic interference values of the conducting wires of the power transmission line, and realizing defect detection by using the electromagnetic field change of the conducting wires of the power transmission line by using the characteristic that the electromagnetic field around the conducting wires of the power transmission line changes when the conducting wires have the defects of line aging, strand breakage and the like; and then, according to the target correlation between the broken strand defect of the conductor and the electromagnetic spectrum distribution, performing correlation analysis on the electromagnetic interference value to obtain the defect condition of the power transmission conductor, so that the defect detection can be still performed by using the method under the condition that the defect detection cannot be performed by using image recognition, infrared recognition and the like.
Referring to fig. 1, fig. 1 is a schematic flow chart of a method for detecting a wire defect of a power transmission line according to an embodiment of the present disclosure. The method for detecting the defect of the wire of the power transmission line can be applied to electronic equipment, and the electronic equipment comprises but is not limited to unmanned aerial vehicles, smart phones, notebook computers, tablet computers and the like. As shown in fig. 1, the method for detecting a wire defect of a power transmission line of the present embodiment includes steps S101 to S103, which are detailed as follows:
step S101, an electromagnetic interference signal of a power transmission conductor is obtained.
In this step, the loop antenna may be used to collect electromagnetic interference signals of the power transmission line at a measurement point around the power transmission line, and the collected electromagnetic interference signals may be sent to the electronic device for signal processing.
And S102, performing spectrum analysis on the electromagnetic interference signal by using a spectrum analyzer to obtain an electromagnetic interference value of the power transmission conductor.
In the step, the electronic equipment is in communication connection with the spectrum analyzer, the electronic equipment sends the electromagnetic interference signal to the spectrum analyzer for spectrum analysis, and the spectrum analyzer returns the electromagnetic interference value obtained by analysis to the electronic equipment.
And S103, performing correlation analysis on the electromagnetic interference value according to the target correlation between the strand breakage defect of the power transmission conductor and the electromagnetic spectrum distribution to obtain the defect condition of the power transmission conductor.
In this step, the electromagnetic spectrum distribution includes a plurality of electromagnetic interference values, and the target correlation is a correspondence between the wire strand breakage defect and the electromagnetic interference values, that is, the wire strand breakage defect is a corresponding electromagnetic interference value interval distribution. Optionally, correlation analysis is performed by means of data comparison to determine whether the power transmission conductor is defective, so as to obtain a defect condition of the power transmission conductor, wherein the defect condition includes that the conductor is defective and the conductor is not defective.
In an embodiment, on the basis of the embodiment shown in fig. 1, before performing correlation analysis on the electromagnetic interference value according to a target correlation between a strand breakage defect of the power transmission line and an electromagnetic spectrum distribution to obtain a defect condition of the power transmission line, the method further includes:
acquiring first electromagnetic spectrum distribution of a normal wire and second electromagnetic spectrum distribution of a defective wire;
and comparing the first electromagnetic spectrum distribution with the second electromagnetic spectrum distribution to obtain the target correlation between the broken strand defect of the lead and the electromagnetic spectrum distribution.
In this embodiment, by comparing the electromagnetic spectrum distribution of the normal conductor with the electromagnetic spectrum distribution of the defective conductor, the electromagnetic spectrum distribution characteristic of the defective conductor relative to the normal conductor can be determined, so that the electromagnetic spectrum distribution characteristic can be used as a basis for determining whether the power transmission conductor is defective in a subsequent application process.
Optionally, the acquiring a first electromagnetic spectrum distribution of a normal wire and a second electromagnetic spectrum distribution of a defective wire includes:
acquiring a first electromagnetic signal set of the normal lead and a second electromagnetic signal set of the defective lead according to a preset measuring point;
and performing spectrum analysis on the first electromagnetic signal set and the second electromagnetic signal set by using a spectrum analyzer to obtain the first electromagnetic spectrum distribution and the second electromagnetic spectrum distribution.
In this alternative embodiment, for example, at a plurality of measurement points, the loop antenna is used to measure the electromagnetic interference value, the length of the wire is 28m, the wire is pressurized to 63.5kV, the electromagnetic interference signals of the normal wire and the broken wire under the condition of 0.5KHz are tested, and the corresponding electromagnetic spectrum distribution is analyzed by a spectrum analyzer.
Optionally, fig. 2 shows a distribution schematic diagram of the measurement points provided in the embodiment of the present application. As shown in fig. 2, the point-to-ground height h of the conductor is 2.95m, the simulated fault point is set as the middle point of the conductor, the origin is selected as the position which is 3.3m away from the fault point on the ground projection, and the connecting line of the point and the fault point is perpendicular to the conductor. 7 points are selected each time, which are 2.5m and 4.5m to the right of the origin, 2m and 3.8m to the left of the origin and 1.7m, 3.5m and 5m away from the wire.
In an embodiment, on the basis of the embodiment shown in fig. 1, the comparing the first electromagnetic spectrum distribution with the second electromagnetic spectrum distribution to obtain the target correlation between the wire stranding defect and the electromagnetic spectrum distribution includes:
calculating electromagnetic field parameters of preset measuring points based on a preset antenna model;
performing data validation on the electromagnetic field parameters and the first electromagnetic spectrum distribution and the second electromagnetic spectrum distribution;
and if the data verification is passed, comparing the first electromagnetic spectrum distribution with the second electromagnetic spectrum distribution to obtain the target correlation.
In this embodiment, two sets of data of the normal wire and the defective wire are compared. Including the instantaneous value of radio interference at 0.5MHz in the case of a normal wire, and the instantaneous value of radio interference at 0.5MHz in the case of a broken wire.
Optionally, in the calculation of the preset antenna model, the propagation attenuation of the corona current on the wire is not considered, the wire is an ideal free space, the influence of the earth is ignored, an electromagnetic interference electric field value, i.e., an electromagnetic field parameter, is obtained at the frequency of 0.5MHz by taking 1 μ V/m as a reference, and the calculation result is compared with the electromagnetic interference value (the first electromagnetic spectrum distribution and the second electromagnetic spectrum distribution) under the condition of 0.5MHz to obtain a verification result. Optionally, if the data difference is within a preset difference range, the verification is determined to be passed.
Optionally, the calculating the electromagnetic field parameter of the preset measurement point based on the preset antenna model includes:
taking a single corona source during corona discharge as an element current section, and acquiring a positive corona parameter of the corona source;
and calculating the electromagnetic field parameters of the preset measuring point according to the positive corona parameters and the distance between the preset measuring point and the corona discharge point by using the preset antenna model.
In this alternative embodiment, fig. 3 shows a schematic diagram of an antenna model provided in an embodiment of the present application. Taking a single corona source of corona discharge as an element current segment, calculating a high-frequency electric field at a receiving point by using the antenna model of fig. 3, wherein the scale of the positive polarity initial flow is about delta l, and the distance between a discharge point and a measurement point is r.
Wherein the parameters of the positive corona generating pulse are as follows:
Figure BDA0003568501910000071
in the time domain, the positive polarity corona pulse may be represented by a double exponential:
i(t)＝K·ip·(eαt-eβt)；
in the formula ipIs the current amplitude (in mA), K, α and β are empirical constants determined from the waveform, and t is in ns.
The electromagnetic field parameters include magnetic field values and electric field values, based on the antenna model of fig. 3, the magnetic field values are:
Figure BDA0003568501910000072
the electric field value is:
Figure BDA0003568501910000073
assuming that a positive polarity initial flow in alternating current corona discharge is analyzed as a main contribution component of electromagnetic interference, pulse current amplitude is 20mA in double index, a single corona source of the corona discharge is used as an element current section, a high-frequency electric field (0.5MHz) at a receiving point is calculated by using an antenna model, the scale of the positive polarity initial flow is about 2cm, the distance between a discharge point and a measuring point is 8m, and a magnetic field and an electric field at the measuring point are calculated by using the formula.
The method for detecting the wire defect of the power transmission line is corresponding to the method embodiment, so that corresponding functions and technical effects are achieved. Referring to fig. 4, fig. 4 is a block diagram illustrating a structure of a device for detecting a wire defect of a power transmission line according to an embodiment of the present application. For convenience of explanation, only the parts related to the present embodiment are shown, and the apparatus for detecting a wire defect of a power transmission line provided in the embodiment of the present application includes:
a first obtaining module 401, configured to obtain an electromagnetic interference signal of a power transmission line;
a spectrum analysis module 402, configured to perform spectrum analysis on the electromagnetic interference signal by using a spectrum analyzer, to obtain an electromagnetic interference value of the power transmission line;
and a correlation analysis module 403, configured to perform correlation analysis on the electromagnetic interference value according to a target correlation between a wire strand breakage defect and electromagnetic spectrum distribution, to obtain a defect condition of the power transmission wire.
In one embodiment, the apparatus further comprises:
the second acquisition module is used for acquiring first electromagnetic spectrum distribution of the normal wire and second electromagnetic spectrum distribution of the defective wire;
and the comparison module is used for comparing the first electromagnetic spectrum distribution with the second electromagnetic spectrum distribution to obtain the target correlation between the broken strand defect of the lead and the electromagnetic spectrum distribution.
In an embodiment, the second obtaining module includes:
the acquisition unit is used for acquiring a first electromagnetic signal set of the normal lead and a second electromagnetic signal set of the defective lead according to a preset measurement point;
and the analysis unit is used for carrying out spectrum analysis on the first electromagnetic signal set and the second electromagnetic signal set by using a spectrum analyzer to obtain the first electromagnetic spectrum distribution and the second electromagnetic spectrum distribution.
In one embodiment, the comparison module includes:
the calculation unit is used for calculating the electromagnetic field parameters of the preset measurement points based on the preset antenna model;
the verification unit is used for carrying out data verification on the electromagnetic field parameters and the first electromagnetic spectrum distribution and the second electromagnetic spectrum distribution;
and the comparison unit is used for comparing the first electromagnetic spectrum distribution with the second electromagnetic spectrum distribution to obtain the target correlation if the data verification is passed.
In one embodiment, the computing unit includes:
the acquisition subunit is used for taking a single corona source during corona discharge as an element current segment and acquiring a positive corona parameter of the corona source;
and the calculation subunit is used for calculating the electromagnetic field parameters of the preset measuring point according to the positive corona parameters and the distance between the preset measuring point and the corona discharge point by using the preset antenna model.
The wire defect detection device of the power transmission line can implement the wire defect detection method of the power transmission line of the embodiment of the method. 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. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application. As shown in fig. 5, the electronic apparatus 5 of this embodiment includes: at least one processor 50 (only one shown in fig. 5), a memory 51, and a computer program 52 stored in the memory 51 and executable on the at least one processor 50, the processor 50 implementing the steps of any of the above-described method embodiments when executing the computer program 52.
The electronic device 5 may be a computing device such as a smart phone, a tablet computer, a desktop computer, and a cloud server. The electronic device may include, but is not limited to, a processor 50, a memory 51. Those skilled in the art will appreciate that fig. 5 is merely an example of the electronic device 5, and does not constitute a limitation of the electronic device 5, and may include more or less components than those shown, or combine some of the components, or different components, such as an input-output device, a network access device, etc.
The Processor 50 may be a Central Processing Unit (CPU), and the Processor 50 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, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 51 may in some embodiments be an internal storage unit of the electronic device 5, such as a hard disk or a memory of the electronic device 5. The memory 51 may also be an external storage device of the electronic device 5 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 electronic device 5. Further, the memory 51 may also include both an internal storage unit and an external storage device of the electronic device 5. The memory 51 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 51 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 running on an electronic device, enables the electronic device to implement the steps in the above method embodiments when executed.
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 an electronic 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 other various media capable of storing program codes.
The above-mentioned embodiments are further detailed to explain the objects, technical solutions and advantages of the present application, 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 any modifications, equivalents, improvements and the like, which come within the spirit and principle of the present application, may occur to those skilled in the art and are intended to be included within the scope of the present application.

Claims (10)

1. A method for detecting a wire defect of a power transmission line is characterized by comprising the following steps:
acquiring an electromagnetic interference signal of a power transmission conductor;
performing spectrum analysis on the electromagnetic interference signal by using a spectrum analyzer to obtain an electromagnetic interference value of the power transmission conductor;
and performing correlation analysis on the electromagnetic interference value according to the target correlation between the strand breakage defect of the wire and the electromagnetic spectrum distribution to obtain the defect condition of the power transmission wire.
2. The method for detecting the defects of the conductive wire according to claim 1, wherein before the correlation analysis is performed on the electromagnetic interference values according to the target correlation between the strand breakage defects of the conductive wire and the electromagnetic spectrum distribution to obtain the defect condition of the power transmission conductive wire, the method further comprises:
acquiring first electromagnetic spectrum distribution of a normal wire and second electromagnetic spectrum distribution of a defective wire;
and comparing the first electromagnetic spectrum distribution with the second electromagnetic spectrum distribution to obtain the target correlation between the broken strand defect of the lead and the electromagnetic spectrum distribution.
3. The wire defect detection method of claim 2, wherein said obtaining a first electromagnetic spectrum distribution of normal wires and a second electromagnetic spectrum distribution of defective wires comprises:
acquiring a first electromagnetic signal set of the normal lead and a second electromagnetic signal set of the defective lead according to a preset measuring point;
and performing spectrum analysis on the first electromagnetic signal set and the second electromagnetic signal set by using a spectrum analyzer to obtain the first electromagnetic spectrum distribution and the second electromagnetic spectrum distribution.
4. The method for detecting the wire defect according to claim 2, wherein the comparing the first electromagnetic spectrum distribution with the second electromagnetic spectrum distribution to obtain the target correlation between the wire strand breakage defect and the electromagnetic spectrum distribution comprises:
calculating electromagnetic field parameters of preset measuring points based on a preset antenna model;
performing data validation on the electromagnetic field parameters and the first electromagnetic spectrum distribution and the second electromagnetic spectrum distribution;
and if the data verification is passed, comparing the first electromagnetic spectrum distribution with the second electromagnetic spectrum distribution to obtain the target correlation.
5. The method for detecting the defects of the lead wire as claimed in claim 4, wherein the step of calculating the electromagnetic field parameters of the preset measuring points based on the preset antenna model comprises the following steps:
taking a single corona source during corona discharge as an element current section, and acquiring a positive corona parameter of the corona source;
and calculating the electromagnetic field parameters of the preset measuring point according to the positive corona parameters and the distance between the preset measuring point and the corona discharge point by using the preset antenna model.
6. A wire defect detection device of transmission line, characterized by comprising:
the first acquisition module is used for acquiring electromagnetic interference signals of the power transmission conductors;
the frequency spectrum analysis module is used for carrying out frequency spectrum analysis on the electromagnetic interference signal by using a frequency spectrum analyzer to obtain an electromagnetic interference value of the power transmission conductor;
and the correlation analysis module is used for performing correlation analysis on the electromagnetic interference value according to the target correlation between the broken strand defect of the wire and the electromagnetic spectrum distribution to obtain the defect condition of the power transmission wire.
7. The wire defect detecting apparatus of claim 6, further comprising:
the second acquisition module is used for acquiring first electromagnetic spectrum distribution of the normal wire and second electromagnetic spectrum distribution of the defective wire;
and the comparison module is used for comparing the first electromagnetic spectrum distribution with the second electromagnetic spectrum distribution to obtain the target correlation between the broken strand defect of the lead and the electromagnetic spectrum distribution.
8. The wire defect detecting apparatus of claim 7, wherein the comparing module comprises:
the calculation unit is used for calculating the electromagnetic field parameters of the preset measurement points based on the preset antenna model;
the verification unit is used for carrying out data verification on the electromagnetic field parameters and the first electromagnetic spectrum distribution and the second electromagnetic spectrum distribution;
and the comparison unit is used for comparing the first electromagnetic spectrum distribution with the second electromagnetic spectrum distribution to obtain the target correlation if the data verification is passed.
9. An electronic device comprising a processor and a memory for storing a computer program which, when executed by the processor, implements the wire defect detection method of 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 the wire defect detection method according to any one of claims 1 to 5.
CN202210316816.XA 2022-03-28 2022-03-28 Method and device for detecting defects of conducting wire of power transmission line Pending CN114660413A (en)

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