CN110133459A - A kind of line insulator operating condition ground detection method - Google Patents
A kind of line insulator operating condition ground detection method Download PDFInfo
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- CN110133459A CN110133459A CN201910441093.4A CN201910441093A CN110133459A CN 110133459 A CN110133459 A CN 110133459A CN 201910441093 A CN201910441093 A CN 201910441093A CN 110133459 A CN110133459 A CN 110133459A
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- insulator
- frequency spectrum
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1245—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of line insulators or spacers, e.g. ceramic overhead line cap insulators; of insulators in HV bushings
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention belongs to technical field of electric power, more particularly to a kind of line insulator operating condition detection method, include the following steps: the first step, acquire the frequency spectrum data that the insulator on shaft tower to be detected generates by the detection of high-frequency detection instrument, each shaft tower detects acquisition multiple groups frequency spectrum data every time；Second step analyzes the multiple groups frequency spectrum data being collected into using insulator chain Leakage Current pulse analysis software, and different analysis results is obtained for different insulator spectrograms.The detection method acquires the discharge pulse signal that integral basis shaft tower insulator issues by high-frequency detection instrument, and these signal datas are analyzed by insulator chain Leakage Current pulse analysis software, to can determine whether abnormal composite insulator characteristic frequency spectrum, failure composite insulator characteristic frequency spectrum, and by judging that insulator runs time limit range to composite insulator spectrum sigtral response, judge that the Ageing of Insulators degree provides foundation to formulate Strategies of Maintenance.
Description
Technical field
The invention belongs to technical field of electric power, and in particular to a kind of line insulator operating condition ground detection method.
Background technique
The improvement project of power equipment constantly carries out, length of service near or above critical limit equipment proportional numbers still
Right very high, especially high voltage distribution installation, including high-voltage circuitbreaker.High-voltage circuitbreaker operation practice have shown that, influence its work
The important component of reliability is insulator, and mechanical strength degree is the emphasis having to check for, and the destruction of insulator will lead to user
Power failure or other accidents.
Dosage of the insulator in transmission line of electricity is huge, many kinds of, is one of the critical component of line power equipment,
It plays a very important role, is directly related to the safe and stable operation of transmission line of electricity.When insulator local environment is more severe
And surface, when having filthy, internal field is stronger, has and larger is likely to occur corona and arcing events.Therefore China's exploitation
And the monitoring running state of contact net means is carried out using overhead contact line state-detection monitoring device (abbreviation 4C system),
In also include detection to contact net insulator.Insulator on-line detection method mainly uses manual inspection mode at present, this
There are many problems for kind manual inspection maintenance mode.Manual inspection maintenance is mainly staff periodically in transmission line of electricity to exhausted
The state of edge carries out eye-observation or special inspecting equipment is detected, and eye-observation has certain subjectivity, exists certain
Security risk, by the method for special inspecting equipment is complicated for operation, cost is high, detection speed it is slow, consumption man power and material very
Greatly.
With the development of Intelligent patrol robot for power transmission circuits technology and digital image processing techniques, for image procossing with
Application of the identification technology in status of electric power detection, has been carried out some beneficial explorations, as based on image recognition
Disconnecting link state recognition, instrument automatic reading etc..It is combined by image recognition technology with robot inspection technology, robot is gradually
The inspection of ground replacement (or part replaces) operator on duty's progress transmission line of electricity power equipment, the exception of instant discovery running equipment,
Defect and failure.The inspection of transmission line of electricity power equipment is carried out by intelligent robot, not only saves manpower, also timely to send out
Failure and existing potential faults in existing equipment running process lay the foundation.
Notification number are as follows: the patent of 106383274 B of CN discloses a kind of transmission line insulator live detection method, leads to
It crosses and the Electric Field Numerical at insulator chain full skirt to be measured edge is measured, obtain electric field sequence；Internal field is asked to electric field sequence
Minimum and label, minimum serial number are exactly insulator umbrella serial number in order to minimum；With minimum serial number abscissa,
Minimum is ordinate, draws out field distribution curve, and then whether judge insulator using existing electric field method diagnostic techniques
There are conductive defects.The detection method identifies insulator umbrella by internal field's minimum, is axis used in electric field method
Tested dot position information is provided to electric field curve, insulator umbrella cannot be accurately identified by overcoming existing electric field method detector
Deficiency, but the detection method uses original Instrument sensor to measure insulator electricity as trigger signal by insulator umbrella
, the electric field value at the position between fitting and the first full skirt cannot be measured, it is not square to the current defect inspection in insulator high-voltage end road
Just, step is complicated, intelligent low, and it is unknown to distort to the one-dimensional longitudinal electric field distribution curve of the conductive defect in the middle part of insulator
It is aobvious, it is difficult to judge.It can detect that insulator high-voltage end minimum defect length is 7 centimetres, middle part minimum defect length is 15 centimetres.
Publication No. is that the patent of 109580713 A of CN discloses a kind of insulator on-line detection method.The technical solution is first
A kind of device for being exclusively used in insulator on-line detection is first developed, which is socketed on insulator chain apical position and completely patch
Insulator is closed, insulator temperature is detected downwards using infrared detector thereon, the insulator temperature information detected is passed through
485 lines are sent to mainboard ram plate, are compared with information such as insulator chain model, material of the initial storage in mainboard, into
And insulator state is determined according to temperature anomaly situation, and analyze potential cause, finally comparison result is sent by 2G network
To background server, conclusion is exported.The detection method determines insulator state in view of insulator shell temperature is extracted, and passes through
Its potential cause of manual analysis needs manually to participate in analysis, and its potential cause is relatively more, cannot further determine that insulator is
It is no there are exception or failure, can not discriminatory analysis go out its pollution level and the operation time limit, which analyzes than shallower
Aobvious, to exception, failure, pollution level etc., further the basic goal of detection is not achieved without too big help in analysis.
Summary of the invention
It is an object of the invention to providing a kind of line insulator operating condition aiming at the problems existing in the prior art
Face detection method, the detection method are suitable for 110-220kV electric transmission line isolator on-line checkings, pass through high-frequency detection instrument
The discharge pulse signal that integral basis shaft tower insulator issues is acquired, and by insulator chain Leakage Current pulse analysis software to these
Signal data is analyzed, thus can determine whether abnormal composite insulator characteristic frequency spectrum, failure composite insulator characteristic frequency spectrum, and
By judging that insulator runs time limit range to composite insulator spectrum sigtral response, the Ageing of Insulators degree is judged to formulate inspection
It repairs strategy and foundation is provided.
The technical scheme is that
A kind of line insulator operating condition ground detection method is suitable for 110-220kV transmission line insulators
The detection of son, includes the following steps:
The first step acquires the frequency spectrum data that the insulator on shaft tower to be detected generates, each bar by the detection of high-frequency detection instrument
Tower detects acquisition multiple groups frequency spectrum data every time；
Second step is analyzed the multiple groups frequency spectrum data being collected into using insulator chain Leakage Current pulse analysis software, needle
Different analysis results is obtained to different insulator spectrograms.
Specifically, the insulator in the first step on shaft tower to be detected is porcelain insulator either compound inslation
Son.
Specifically, being adopted when the insulator on the shaft tower to be detected is porcelain insulator by analysis
The porcelain insulator frequency spectrum of collection finds out porcelain faulty insulator characteristic frequency spectrum, further finds out zero resistance insulator existing for shaft tower.
Specifically, the insulator on the shaft tower to be detected is the compound inslation period of the day from 11 p.m. to 1 a.m, pass through the compound of analysis acquisition
Insulator spectrogram finds out abnormal composite insulator characteristic frequency spectrum and failure composite insulator characteristic frequency spectrum.
Specifically, by analyzing and determining that insulator runs time limit range to composite insulator characteristic frequency spectrum, to judge absolutely
Edge degree of aging.
Specifically, the high-frequency detection instrument that the step one uses is high-tension insulator detector.
High voltage transmission line road, when there is a phenomenon where pass through when shelf depreciation or incomplete breakdown for interior insulator medium
It will appear the discharge pulse signal being consequently formed in the earth-return circuit of shaft tower, if detecting this discharge pulse signal, can find
The situation that insulator breaks down, and faulty insulator especially zero resistance insulator will substantially reduce the insulation water of high-tension line
It is flat.Pulse signal appears in 3MHZ -5MHZ, and pulse amplitude is more than that 50,000 (critical values) can determine that there are failures on the shaft tower
Insulator, pulse signal is more intensive, and pulse amplitude is higher illustrates that failure is more serious, fault severity level can be approximately considered with
Pulse signal concentration and pulse amplitude height are proportional.
The beneficial effects of the present invention are: this detection method uses high-tension insulator detector, which utilizes wideband clamp electricity
Flow sensor is inserted in tower grounding lead, the extremely faint leakage current pulse current signal issued by acquisition insulator, to institute
The leakage current pulse signal of acquisition carries out amplitude and FFT spectrum analysis, and observation is compared in a power frequency period with or without faulty insulator
Difference in the presence of son between impulse waveform and frequency spectrum finds out the characteristic frequency spectrum of faulty insulator generation, reaches ground detection event
Hinder the purpose of insulator.The detection method is suitable for 110-220kV electric transmission line isolator on-line checkings, high-frequency detection instrument
The discharge pulse signal that acquisition integral basis shaft tower insulator issues obtains characteristic frequency spectrum, and passes through insulator chain Leakage Current pulse point
Analysis software carries out analysis to these signal datas and forms spectrogram, to can determine whether abnormal composite insulator characteristic frequency spectrum, failure
Composite insulator characteristic frequency spectrum, and by judging that insulator runs time limit range to composite insulator spectrum sigtral response, together
One phase angle frequently occurs pulse signal number and limits more for many years bigger, and composite insulator has occurred and that aging phenomenon is unfavorable for for a long time
Operation, should gradually replace.The Ageing of Insulators degree can be approximately considered and the voltage of pulse signal and same phase angle pulse letter
Number number is proportional, judges that the Ageing of Insulators degree provides foundation to formulate Strategies of Maintenance.
Detection method provided by the invention is live detection, can be detected to insulator without line outage；It can be with
Operation conditions is carried out to insulators all on integral basis shaft tower to differentiate；It can detecte porcelain insulator and composite insulator；It surveys
Examination personnel do not have to step on the high-risk movement such as bar using the detection method, and running isolator detecting can be completed conveniently on ground,
Efficiently, fast, corresponding work can be completed in one group of two people, saves manpower, improves testing efficiency, has greatly economic effect
Benefit.
Detailed description of the invention
Fig. 1 is characteristic frequency spectrum figure existing for the faulty insulator of porcelain insulator；
Fig. 2 is characteristic frequency spectrum figure existing for porcelain insulator fault-free insulator；
Fig. 3 is characteristic frequency spectrum figure when composite insulator state is preferable；
Fig. 4 is characteristic frequency spectrum figure when surface of composite insulator has filthy；
Fig. 5 be longtime running it is possible that composite insulator breakdown fault characteristic frequency spectrum figure.
Specific embodiment
Below in conjunction with attached drawing, the present invention will be described in more detail.
Embodiment 1
The present embodiment is detected for 220kV transmission line ceramic insulator, uses a kind of line insulation provided by the invention
Sub- operating condition ground detection method, includes the following steps:
The first step acquires the frequency spectrum data that the porcelain insulator on shaft tower to be detected generates by the detection of high-frequency detection instrument, often
One shaft tower detects 20 groups of frequency spectrum datas of acquisition every time, and the detecting instrument that the present embodiment uses is GJ-1 high-tension insulator detector,
The detecting instrument technical performance is safe and reliable, saves human time and cost, improves the unsafe operating environment of worker, reduces work
Make the working strength of personnel；
Second step, using insulator chain Leakage Current pulse analysis software to 20 groups of frequency spectrum datas being collected into generate spectrogram into
Row analysis is characteristic frequency spectrum figure existing for the faulty insulator of porcelain insulator of acquisition, the letter of pulse shown in Fig. 1 as shown in Figure 1
Number appear in 3MHZ -5MHZ, and pulse amplitude is more than 50,000 and a large amount of pulse signals occurs to determine on the shaft tower that there are failures exhausted
Edge, pulse signal is more intensive, and pulse amplitude is higher illustrates that failure is more serious, can rapidly find out the insulation of zero existing for shaft tower
Son；The existing characteristic frequency spectrum figure of porcelain insulator fault-free insulator is shown in Fig. 2, can be with according to laboratory test result
Knowing only could embody discharge pulse as judgment basis using the section 3MHZ -5MHZ, other not as judgment basis, and
It is only used as judging that the region interference signal is strong and weak, although so there is pulse signal in 1-2MHZ in Fig. 2, in 3MHZ-
The section 5MHZ does not have pulse signal to illustrate that faulty insulator is not present on shaft tower,.The present embodiment uses GJ-1 pulse signal
Analyze software V1.1.0.
Embodiment 2
The present embodiment is detected for 220kV transmission line composite insulator unlike the first embodiment, is mentioned using the present invention
A kind of line insulator operating condition ground detection method supplied, includes the following steps:
The first step acquires the spectrum number that the composite insulator on shaft tower to be detected generates by the detection of GJ-1 high-frequency detection instrument
According to each shaft tower detects 20 groups of frequency spectrum datas of acquisition every time；
Second step generates spectrogram simultaneously to 20 groups of frequency spectrum datas being collected into using insulator chain Leakage Current pulse analysis software
It is analyzed, finds out abnormal composite insulator characteristic frequency spectrum and failure composite insulator characteristic frequency spectrum, be illustrated in figure 3 compound exhausted
Characteristic frequency spectrum figure when edge state is preferable, it is shown that there is pulse signal in test spectrogram when voltage is greater than 0.8V, it can
There is no 1.5V or more pulse signal to find out in pulse signal, can determine that the insulator operation time limit is equivalent to III grade of filthy area's operation
5 years and following composite insulator, composite insulator state preferably can longtime runnings；It is that surface of composite insulator is deposited as shown in Figure 4
Characteristic frequency spectrum figure in filth includes 2V in pulse signal as can be seen from Figure 4, and can determine that persistently occurs in pulse signal
Composite insulator has already appeared more serious filth as abnormal compound exhausted insulator on the shaft tower, and quantity occur according to pulse signal can
Composite insulator pollution level is determined, when appearance can determine that insulation greater than 1.5V and less than 2.5V pulse signal in pulse signal
The son operation time limit is equivalent to III grade of filthy area and runs 5-10 years composite insulators, and pulse signal number it is fewer closer to 5 years,
Pulse signal number is mostly closer to 10 years, when same phase angle frequently occurs greater than 10 2V pulse signal longtime runnings possibility
It will appear pollution flashover tripping fault；If in pulse signal include 3V, and pulse signal persistently occurs be can determine that it is compound on the shaft tower
It is failure composite insulator that insulator, which has already appeared aging, and dielectric strength reduces, when same phase angle frequently occurs 1 or more
3V pulse signal longtime running is it is possible that composite insulator punctures tripping fault.
Fig. 5 be longtime running it is possible that composite insulator breakdown fault characteristic frequency spectrum figure, as can be drawn from Figure 5,
Occur being greater than 3V pulse signal in pulse signal, can determine that the insulator operation time limit is equivalent to III grade of filth area operation 10 years or more
Composite insulator, it is bigger that same phase angle frequently occurs pulse signal number more composite insulator service lives, compound inslation
Son has occurred and that aging phenomenon is unfavorable for longtime running, should gradually replace.
If when appearance is greater than 4V pulse signal and number is more than 5 and constantly illustrates that composite insulator is weathered serious,
Be not suitable for charging operation, should replace in a short time.
The present embodiment uses GJ-1 pulse signal to analyze software V1.1.0.
Detection method provided by the invention is live detection, can be detected to insulator without line outage；It can be with
Operation conditions is carried out to insulators all on integral basis shaft tower to differentiate；It can detecte porcelain insulator and composite insulator；It surveys
Examination personnel do not have to step on the high-risk movement such as bar using the detection method, and running isolator detecting can be completed conveniently on ground,
Efficiently, fast, corresponding work can be completed in one group of two people, saves manpower, improves testing efficiency, has greatly economic effect
Benefit.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, it should be understood by those ordinary skilled in the art that: still
It can modify to a specific embodiment of the invention or some technical features can be equivalently replaced；Without departing from this hair
The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.
Claims (6)
1. a kind of line insulator operating condition ground detection method is suitable for 110-220kV transmission line insulators
The detection of son, which comprises the steps of:
The first step acquires the frequency spectrum data that the insulator on shaft tower to be detected generates, each bar by the detection of high-frequency detection instrument
Tower detects acquisition multiple groups frequency spectrum data every time；
Second step is analyzed the multiple groups frequency spectrum data being collected into using insulator chain Leakage Current pulse analysis software, needle
Different analysis results is obtained to different insulator spectrograms.
2. line insulator operating condition ground detection method according to claim 1, which is characterized in that the first step
In insulator on shaft tower to be detected be porcelain insulator either composite insulator.
3. line insulator operating condition ground detection method according to claim 2, which is characterized in that be detected described
Shaft tower on insulator be porcelain insulator when, by analysis acquisition porcelain insulator frequency spectrum find out porcelain faulty insulator
Characteristic frequency spectrum further finds out zero resistance insulator existing for shaft tower.
4. line insulator operating condition ground detection method according to claim 2, which is characterized in that be detected described
Shaft tower on insulator be the compound inslation period of the day from 11 p.m. to 1 a.m, by analysis acquisition composite insulator spectrogram find out abnormal compound inslation
Subcharacter frequency spectrum and failure composite insulator characteristic frequency spectrum.
5. line insulator operating condition ground detection method according to claim 2, which is characterized in that by compound exhausted
Edge subcharacter spectrum analysis judges that insulator runs time limit range, to judge the Ageing of Insulators degree.
6. line insulator operating condition ground detection method according to claim 1, which is characterized in that the step one
The high-frequency detection instrument used is high-tension insulator detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910441093.4A CN110133459A (en) | 2019-05-24 | 2019-05-24 | A kind of line insulator operating condition ground detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910441093.4A CN110133459A (en) | 2019-05-24 | 2019-05-24 | A kind of line insulator operating condition ground detection method |
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| Publication Number | Publication Date |
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| CN110133459A true CN110133459A (en) | 2019-08-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910441093.4A Withdrawn CN110133459A (en) | 2019-05-24 | 2019-05-24 | A kind of line insulator operating condition ground detection method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113419150A (en) * | 2021-07-15 | 2021-09-21 | 贵州电网有限责任公司 | Fault insulator online detection device and detection method based on electromagnetic compounding |
| CN113740673A (en) * | 2021-07-15 | 2021-12-03 | 贵州电网有限责任公司 | Fault insulator online detection device and detection method based on magnetic array |
-
2019
- 2019-05-24 CN CN201910441093.4A patent/CN110133459A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113419150A (en) * | 2021-07-15 | 2021-09-21 | 贵州电网有限责任公司 | Fault insulator online detection device and detection method based on electromagnetic compounding |
| CN113740673A (en) * | 2021-07-15 | 2021-12-03 | 贵州电网有限责任公司 | Fault insulator online detection device and detection method based on magnetic array |
| CN113740673B (en) * | 2021-07-15 | 2024-05-03 | 贵州电网有限责任公司 | Fault insulator online detection device and detection method based on magnetic array |
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Application publication date: 20190816 |